CN117639424A - Vibration motor - Google Patents

Vibration motor Download PDF

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Publication number
CN117639424A
CN117639424A CN202311117604.XA CN202311117604A CN117639424A CN 117639424 A CN117639424 A CN 117639424A CN 202311117604 A CN202311117604 A CN 202311117604A CN 117639424 A CN117639424 A CN 117639424A
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CN
China
Prior art keywords
vibration motor
coil
vibrator
mass body
disposed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311117604.XA
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Chinese (zh)
Inventor
冈本法恭
井上顺
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Nidec Corp
Original Assignee
Nidec Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2023026364A external-priority patent/JP2024035032A/en
Application filed by Nidec Corp filed Critical Nidec Corp
Publication of CN117639424A publication Critical patent/CN117639424A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

The invention provides a vibration motor. The vibration motor has a stator and a vibrator capable of vibrating in a first direction. The stator has a coil and a housing. The coil is opposed to the vibrator in a second direction perpendicular to the first direction. The case houses the coil and the vibrator. The vibrator has a mass body, a magnet member, and a sliding member. The mass extends in a first direction. The magnet member is fixed to the mass body and faces the coil in the second direction. The sliding member is disposed on an end surface of the mass body in a direction intersecting the first direction, and slides on an inner surface of the case when the sliding member contacts the inner surface of the case when the vibrator vibrates.

Description

Vibration motor
Technical Field
The present invention relates to a vibration motor.
Background
Conventionally, a vibration motor that vibrates in one direction is known. For example, the vibration motor has a housing, a vibrator, and a guide shaft. Guide shafts are provided at both ends of the vibrator. The vibrator is disposed in a space formed in the housing and vibrates along the guide shaft (see international patent application publication No. 2021/134173).
In addition, a vibration motor that vibrates in one direction has been known. For example, the vibration motor has a vibration member provided in a housing and an elastic connection portion for suspending the vibration member from the housing. One end of the elastic connection part is welded on the side surface of the vibration part. The other end is welded to the housing (see Japanese patent application laid-open No. 2016-131973).
By vibrating the vibrator along the guide shaft, the posture of the vibrator can be controlled. For example, the vibrator is prevented from moving in a direction other than the vibration direction, and the vibrator is prevented from coming into contact with the case. In addition, rotational vibration of the vibrator about an axis parallel to a direction intersecting the vibration direction is suppressed. In addition, in the above case, it may be difficult to connect the vibrator to the side surface of the vibration member, and it may be difficult to increase the vibration amplitude of the vibrator. Therefore, the inventors of the present application studied to mount an elastic member at an end in the vibration direction. In this case, the elastic member is easily positioned and connected by forming the portion of the mass body of the vibration member that engages with the elastic member.
Patent document 1: international patent application publication No. 2021/134173
Patent document 2: japanese patent laid-open publication 2016-131973
However, in the case of performing attitude control of vibration of the vibrator by the guide shaft, it is necessary to reduce the volume of the vibrator and secure a space for disposing the guide shaft. Therefore, the weight of the vibrator is significantly reduced. The weight of the vibrator has a great influence on the vibration performance of the vibration motor. Therefore, it is desirable to control the posture of the vibrator with a simple structure without disposing the guide shaft.
In addition, a coil for driving the vibrator to reciprocate is disposed in the vibration motor. In general, an end portion (i.e., a lead wire) of a conductor that starts winding around a predetermined axis when manufacturing a coil is disposed at a position axially outward of a winding portion of the coil. Therefore, if the lead wire is arranged between the vibrator and the winding portion of the coil, the interval therebetween becomes wider. Therefore, the lorentz force acting on the vibrator due to the magnetic flux of the coil is less likely to be increased, and the output of the vibration motor may not be increased. In addition, if the above-described lead wire is disposed between the coil and the case to which the coil is fixed, a gap is formed therebetween, and thus, it may be difficult to achieve downsizing of the vibration motor.
In addition, in the vibration motor, in order to further improve the performance of the vibrator in a limited space, a metal material having a high specific gravity such as tungsten is used for the mass body. Tungsten has a high hardness and thus has low machinability. Therefore, it is difficult to form a portion of the mass body that engages with the elastic member. Therefore, it may be difficult to connect the elastic member to the mass body.
Disclosure of Invention
A first object of the present invention is to provide a vibration motor in which a vibrator is stably vibrated with a simple structure. Further, a second object of the present invention is to further increase the output of a vibration motor while miniaturizing the vibration motor.
Further, an object of the present invention is to provide a vibration motor capable of easily connecting a mass body and an elastic member.
To achieve the first object, an exemplary vibration motor of the present invention has a stator and a vibrator capable of vibrating in a first direction. The stator has a coil and a housing. The coil is opposed to the vibrator in a second direction perpendicular to the first direction. The housing accommodates the coil and the vibrator. The vibrator has a mass body, a magnet member, and a sliding member. The mass extends in the first direction. The magnet member is fixed to the mass body and faces the coil in the second direction. The sliding member is disposed on an end surface of the mass body in a direction intersecting the first direction, and slides on an inner surface of the case when contacting the inner surface of the case when the vibrator vibrates.
To achieve the second object, an exemplary vibration motor of the present invention has a stator and a vibrator capable of vibrating in a first direction. The stator has a coil and a housing. The coil is opposed to the vibrator in a second direction perpendicular to the first direction. The housing accommodates the coil and the vibrator. The vibrator has a mass body and a magnet member. The mass extends in the first direction. The magnet member is fixed to the mass body and faces the coil in the second direction. The coil has a lead wire led out from a winding portion made of a coil-shaped wire, and the lead wire is disposed on the side of the case in the second direction with respect to the winding portion. The housing has an opening that receives the lead-out wire.
To achieve the third object, an exemplary vibration motor of the present invention has a stator, a vibrator, and an elastic member. The vibrator is capable of vibrating at least in a first direction. The elastic component is connected with the vibrator and the stator. The stator has a coil. The coil is opposed to the vibrator in a second direction perpendicular to the first direction. The vibrator has a mass body, a magnet member, and a connection member. The mass extends in the first direction. The magnet member is fixed to the mass body and faces the coil in the second direction. The connecting member connects the mass body and the elastic member. The material of the connecting part is different from the mass body.
Further features and advantages of the present invention are further apparent from the embodiments shown below.
According to the exemplary vibration motor of the present invention, a vibration motor in which a vibrator is stably vibrated with a simple structure can be provided. In addition, the output of the vibration motor can be further increased while the vibration motor is miniaturized.
In addition, a vibration motor that can easily connect a mass body and an elastic member can be provided.
Drawings
Fig. 1 is a perspective view of a vibration motor according to an exemplary embodiment of the present invention.
Fig. 2 is a sectional view of the vibration motor along the chain line II-II of fig. 1.
Fig. 3 is a sectional view of the vibration motor along the dash-dot line III-III of fig. 1.
Fig. 4 is an exploded perspective view of the vibration motor of fig. 1.
Fig. 5 is a perspective view of a vibration motor according to a modification of the embodiment.
Fig. 6 is a sectional view of the vibration motor along the dotted line VI-VI of fig. 5.
Fig. 7 is an exploded perspective view of the vibration motor of fig. 5.
Fig. 8 is a schematic diagram showing an example of an electronic device.
Fig. 9 is a sectional view of the vibration motor along the dash-dot line II-II of fig. 1.
Fig. 10 is an exploded perspective view of the vibration motor.
Fig. 11 is an exploded perspective view showing an example of a connection portion between the mass body and the elastic member via the connection member.
Fig. 12 is an exploded perspective view showing a first modification of the connecting member.
Fig. 13 is an exploded perspective view showing a second modification of the connecting member.
Fig. 14 is an exploded perspective view showing a third modification of the connecting member.
Description of the reference numerals
100: a vibration motor; 101: a stator; 1: a housing; 11: a cover portion; 111: a top surface portion; 112: a front side surface portion; 113: a rear side surface portion; 114: a left side surface portion; 115: a right side surface portion; 12: a bottom plate; 121: a protruding piece; 13: a first housing; 131: a top surface portion; 1311: a concave portion; 1312: a first opening; 132: a front side surface portion; 133: a rear side surface portion; 14: a second housing; 141: a bottom surface portion; 1411: a second opening; 142: a left side surface portion; 143: a right side surface portion; 144: a convex portion; 145: a protruding piece; 2: a substrate; 21: a base; 21A, 21B: an electrode section; 22. 23: a bending part; 22A, 23A: an electrode section; 3: a coil; 301: a winding section; 302: a lead-out wire; 302U: a first lead-out wire; 302D: a second lead-out wire; 31: a first coil; 32: a second coil; 4: a protection member; 41: a first protective member; 42: a second protection member; 102: a vibrator; 6: a mass body; 601: an upper surface; 601L, 601R: a region; 602: a lower surface; 602L, 602R: a region; 603: a front surface; 604: a rear surface; 61: a central portion; 62. 621, 622: a side body portion; 64U, 64D: a groove; 641U, 641D: a bottom surface; 65: a through hole; 66: corner recess; 67: a protruding portion; 7: a magnet member; 8. 81, 82, 83, 84: a connecting member; 9: a sliding member; 91U, 91D: a first sliding member; 92F, 92B: a second sliding member; 93U, 93D: a third sliding member; 94: a chamfering part; 103. 1031, 1032, 1033, 1034: an elastic member; 200: an electronic device; 201: a concave portion; b: and a buffer member.
Detailed Description
Hereinafter, exemplary embodiments will be described with reference to the drawings.
In the present specification, in the drawings, the longitudinal direction of the vibration motor 100 is defined as the X-axis direction.
The left side of the drawing in the X-axis direction is shown as X1, and the right side is shown as X2. The width direction of the vibration motor 100 is defined as the Y-axis direction. The front of the drawing in the Y-axis direction is shown as Y1, and the rear is shown as Y2. The thickness direction of the vibration motor 100 is set to the Z-axis direction. The upper side of the drawing in the Z-axis direction is shown as Z1, and the lower side is shown as Z2. The X-axis direction, the Y-axis direction, and the Z-axis direction are orthogonal to each other.
The X-axis direction is an example of the "first direction" of the present invention, and is referred to as "left-right direction" in the present specification. The Y-axis direction is an example of the "third direction" of the present invention, and is referred to as the "front-rear direction" in the present specification. The Z-axis direction is an example of the "second direction" of the present invention, and is referred to as "up-down direction" in the present specification.
In addition, the term "parallel" in the positional relationship of any one of the azimuth, the line, and the plane with any other one includes not only a state where both are completely disjoint wherever they extend, but also a substantially parallel state. In addition, "perpendicular" and "orthogonal" include not only a state in which both intersect each other at 90 degrees, but also a substantially perpendicular state and a substantially orthogonal state, respectively. That is, the terms "parallel", "perpendicular" and "orthogonal" include a state in which the positional relationship of the two is angularly offset to an extent that does not deviate from the gist of the present invention.
These are for illustration only, and are not intended to limit the actual positional relationship, direction, names, etc.
< 1. Embodiment >
1-1. Integral Structure of vibration Motor 100 >, and method for manufacturing the same
Fig. 1 is a perspective view of a vibration motor 100 according to an exemplary embodiment of the present invention. Fig. 2 is a sectional view of the vibration motor 100 along the dash-dot line II-II of fig. 1. Fig. 3 is a sectional view of the vibration motor 100 along the dash-dot line III-III of fig. 1. Fig. 4 is an exploded perspective view of the vibration motor 100 of fig. 1. In fig. 1, a lid 11 described later is shown in a transparent manner.
The vibration motor 100 is a so-called lateral linear vibration motor capable of generating vibrations in the lateral direction. The vibration motor 100 includes a stator 101, a vibrator 102, and an elastic member 103.
1-2 stator 101 >, stator
The stator 101 includes a housing 1, a substrate 2, a coil 3, and a protective member 4.
The case 1 houses the coil 3, the vibrator 102, and the like. The case 1 is made of a metal material such as stainless steel. However, the material of the case 1 is not limited to this example, and may be resin.
The housing 1 has a cover 11 and a bottom plate 12. The cover 11 is attached from above the bottom plate 12 to form the housing 1. The cover 11 has a rectangular body shape with a lower opening. The cover 11 includes a top surface 111, a front surface 112, a rear surface 113, a left surface 114, and a right surface 115. The top surface 111 has a plate shape extending in the left-right direction and the front-rear direction, and faces the vibrator 102 with a gap therebetween in the up-down direction. The front side surface 112, the rear side surface 113, the left side surface 114, and the right side surface 115 extend downward from the edge of the top surface 111. The front side surface 112 and the rear side surface 113 are plate-shaped extending in the left-right direction, and are opposed to the vibrator 102 with a gap therebetween in the front-rear direction. The front side surface 112 is disposed forward of the rear side surface 113. The left side surface 114 and the right side surface 115 are plate-shaped extending in the front-rear direction, and are opposed to the vibrator 102 with a gap therebetween in the left-right direction. The left side surface 114 is disposed to the left of the right side surface 115. The bottom plate 12 is a plate-like member extending in the left-right direction and the front-rear direction, and is opposed to the vibrator 102 with a gap therebetween in the up-down direction. The vibrator 102, the coil 3, the protection member 4, and the elastic member 103 are housed in a space surrounded by the cover 11 and the bottom plate 12.
The substrate 2 is, for example, an FPC (flexible printed circuit board). However, this illustration does not exclude a structure in which the substrate 2 is not an FPC. For example, the substrate 2 may be a rigid (rib) substrate such as a glass epoxy substrate.
The substrate 2 has a base 21 and bending portions 22 and 23 bent with respect to the base 21. The bottom plate 12 has a protruding piece 121 protruding forward from the front edge.
The base 21 is disposed on the protruding piece 121. The bent portions 22 and 23 are disposed along the front side surface portion 112 of the cover 11. The coil 3 is electrically connected to the substrate 2. Specifically, the substrate 2 is mounted with a wiring (not shown) electrically connected to the coil 3. The vibration motor 100 has a base plate 2. The substrate 2 is provided for supplying current to the coil 3.
The coil 3 is opposed to the vibrator 102 in the up-down direction perpendicular to the left-right direction. The coil 3 has a first coil 31 and a second coil 32. The first coil 31 is disposed above the second coil 32. The first coil 31 and the second coil 32 are configured by winding a wire around an axis along the up-down direction. Magnetic force lines are generated by supplying current to the first coil 31 and the second coil 32.
It is preferable that the width of (the winding portion of) the coil 3 in the front-rear direction is wider than the width of the magnet member 7 in the front-rear direction. For example, at least one of the first coil 31 and the second coil 32 has a width in the front-rear direction that is wider than a width in the front-rear direction of the magnet member 7. In this way, the portion extending in the front-rear direction in the winding portion of the coil 3 can be made longer. Therefore, the lorentz force acting on the magnet member 7 can be further increased when the coil 3 is energized, and therefore the moving speed and the vibration width of the vibrator 102 can be further increased. However, this example does not exclude a configuration in which the width of the coil 3 in the front-rear direction is equal to or smaller than the width of the magnet member 7 in the front-rear direction.
The outgoing line of the coil 3 passes throughA lead-out port (reference numeral omitted) provided in the front side surface portion 112 of the cover 11 is led out of the case 1 from the winding portion 301, and is connected to electrode portions 22A, 23A provided in the bent portions 22, 23 of the substrate 2. The electrode portion 22A is connected to an electrode portion 21A provided on the base 21 through a wiring, not shown, provided on the substrate 2. The electrode portion 23A is connected to an electrode portion 21B provided on the base 21 via a wiring, not shown, provided on the substrate 2. The current supplied to the coil 3 is in accordance with the electrode portion 21A (or 21B)Electrode portion 22A (or 23A)/(S)>Coil 3->Electrode portion 23A (or 22A)/(S)>The electrode portions 21B (or 21A) sequentially flow.
In addition, the coil 3 has a first coil 31 and a second coil 32. The first coil 31 is disposed above the second coil 32. The first coil 31 and the second coil 32 are configured by winding a wire around an axis along the up-down direction.
The protection member 4 covers at least the end portions in the left-right direction of the coil 3. As described above, the stator 101 has the protection member 4. In the present embodiment, the protection member 4 is made of, for example, resin, and surrounds and protects the coil 3. The protection member 4 has a first protection member 41 and a second protection member 42. The first protective member 41 surrounds the first coil 31. The first coil 31 and the first protective member 41 are disposed on the lower surface of the top surface portion 111 of the cover 11, and are opposed to the vibrator 102 with a space therebetween in the up-down direction. In addition, the second protection member 42 surrounds the second coil 32. The second coil 32 and the second protective member 42 are disposed on the upper surface of the base plate 12, and are opposed to the vibrator 102 with a gap therebetween in the up-down direction.
The end portion of the protection member 4 on the vibrator 102 side in the up-down direction is disposed on the vibrator 102 side in the up-down direction with respect to the coil 3. For example, the lower end portion of the first protection member 41 is disposed below the lower end portion of the first coil 31. The upper end portion of the second protection member 42 is disposed above the upper end portion of the second coil 32. In this way, even if the vibrator 102 shakes in the up-down direction, contact with the coil 3 can be prevented by the protection member 4 coming into contact with the vibrator 102. Further, the protector 4 slides on third sliding members 93U and 93D described later, so that the vibrator 102 can be vibrated stably.
< 1-3 vibrator 102 >)
The vibrator 102 is capable of vibrating at least in the left-right direction. The vibrator 102 includes a mass body 6, a magnet member 7, a connection member 8, and a sliding member 9. The slide member 9 will be described later.
The mass body 6 is made of tungsten or an alloy thereof, for example, and increases the weight of the vibrator 102 to thereby increase the vibration output of the vibration motor 100. The mass body 6 extends in the left-right direction. In addition, the mass body 6 expands in the front-rear direction and has a thickness in the up-down direction. For example, the width of the mass body 6 in the up-down direction is narrower than the width in the front-back direction perpendicular to the left-right direction and the up-down direction. This makes it possible to thin the vibration motor 100 in the vertical direction.
The mass body 6 has a central portion 61 and 2 side body portions 621, 622. Hereinafter, the side body portions 621 and 622 may be collectively referred to as "side body portion 62". The central portion 61 and the side body portions 621, 622 are each rectangular in shape when viewed in the up-down direction. However, this example does not exclude a structure in which at least one of the central portion 61 and the side body portions 621 and 622 is not rectangular. The central portion 61 and the side body portions 621 and 622 may have shapes that are not inconsistent with the gist of the present invention.
The central portion 61 and the side body portions 621, 622 are integral and one piece. The center portion 61 is a portion at the center of the mass body 6 in the lateral direction. The left side body 621 protrudes leftward from the center portion 61. The left end portion of the side body portion 621 faces the left side surface portion 114 with a sufficient distance therebetween in the left-right direction. The right side body 622 protrudes rightward from the center portion 61. The right end portion of the side body 622 is opposed to the right side surface portion 115 with a sufficient distance therebetween in the left-right direction. The front ends of the side body portions 621 and 622 are disposed rearward of the front end of the central portion 61. Rear end portions of the side body portions 621 and 622 are disposed forward of the rear end portion of the central portion 61.
The mass body 6 has grooves 64U and 64D. The grooves 64U and 64D are disposed at the left-right direction central portions of the upper and lower surfaces of the mass body 6, respectively, and extend in the front-rear direction. The groove 64U is disposed on the upper surface 601 of the central portion 61 and is recessed downward. The groove 64D is disposed on the lower surface 602 of the central portion 61 and is recessed upward. The front ends of the grooves 64U, 64D reach the front end of the central portion 61, respectively. The rear end portions of the grooves 64U, 64D reach the rear end portion of the central portion 61, respectively.
The first coil 31 and the first protection member 41 are disposed inside the groove 64U, and are opposed to the upward-facing bottom surface 641U of the groove 64U with a gap therebetween in the vertical direction. The second coil 32 and the second protection member 42 are disposed inside the groove 64D, and are opposed to the bottom surface 641D of the groove 64D facing downward with a gap therebetween in the vertical direction. This makes it possible to further thin the vibration motor 100. In addition, since electromagnetic force can be obtained by the upper and lower coils 3, vibration output is improved.
The mass body 6 has a through hole 65. The through hole 65 has a polygonal shape when viewed from the vertical direction, and accommodates the magnet member 7. For example, the through hole 65 is rectangular when viewed from the vertical direction, and penetrates in the vertical direction between the bottom surfaces 641U, 641D of the grooves 64U, 64D facing each other in the vertical direction. The illustration does not exclude a configuration in which the through hole 65 has a shape other than a polygonal shape when viewed from the vertical direction. For example, the through hole 65 may be circular when viewed from the vertical direction. The upper end of the through hole 65 opens to the upward bottom 641U of the groove 64U. The lower end of the through hole 65 opens to the bottom 641D of the groove 64D facing downward.
The magnet member 7 is fixed to the mass body 6 and faces the coil 3 in the up-down direction. The magnet member 7 is disposed inside the grooves 64U and 64D as viewed in the vertical direction on the mass body 6, and is fixed to the inside of the through hole 65 by an adhesive or the like. As a result, the vibration motor 100 can be made thinner than in the case where the magnet members 7 are provided on the bottom surfaces 641U, 641D of the grooves 64U, 64D.
The magnet member 7 has magnetic poles in the left-right direction. That is, the magnet member 7 has an N pole in the left direction, an S pole in the right direction, or an S pole in the left direction and an N pole in the right direction.
The magnet member 7 is opposed to the coil 3 in the up-down direction. For example, as described above, the coil 3 has the first coil 31 and the second coil 32. The first coil 31 and the first protective member 41 are disposed above the magnet member 7. The second coil 32 and the second protection member 42 are disposed below the magnet member 7.
By disposing the coils 3 on both sides of the magnet member 7 in the up-down direction, a driving force of vibration is generated on both sides of the magnet member 7. Therefore, the vibrator 102 is less likely to shake in the up-down direction than a case where the coil 3 is used and the driving force is generated only on one side of the magnet member 7, for example, and therefore the vibrator 102 can be vibrated stably in the left-right direction.
In addition, the arrangement of the magnet member 7 can be simplified. Since it is not necessary to maximize the magnetic field strength on one side (the coil 3 side on one side) of the magnet member 7 in the vertical direction, it is not necessary to construct the magnet member 7 from a plurality of magnet pieces arranged in halbach, for example.
The connection member 8 connects the mass body 6 and the elastic member 103. The connection member 8 is made of a material (e.g., stainless steel) different from that of the mass body 6, and is fixed to the mass body 6 by, for example, an adhesive, brazing, welding, diffusion bonding, or the like. In the present embodiment, the connection member 8 includes 4 connection members 81, 82, 83, 84. The 4 connection members 81, 82, 83, 84 are disposed at both ends in the front-rear direction of the central portion 61 at both ends in the left-right direction thereof.
1-4 elastic part 103 >
The elastic member 103 connects the vibrator 102 and the stator 101. As described above, the vibration motor 100 has the elastic member 103. The elastic member 103 is stretchable in the left-right direction.
The elastic members 103 are disposed between the both end portions of the mass body 6 in the lateral direction and the inner surface of the housing 1. The elastic members 103 are disposed at both ends in the front-rear direction at the respective ends in the left-right direction of the mass body 6. The front-rear direction is a direction perpendicular to the left-right direction and the up-down direction. In the present embodiment, the elastic member 103 includes 4 elastic members 1031, 1032, 1033, 1034.
For example, in the present embodiment, 2 elastic members 1031 and 1032 are arranged between the left side surface 114 and the left end of the transducer 102. At the left end portion of the mass body 6, the right end portion of the elastic member 1031 is fixed to the front end portion of the central portion 61 via the connecting member 81. The right end portion of the elastic member 1032 is fixed to the rear end portion of the central portion 61 via the connecting member 82. The left end portions of the elastic members 1031, 1032 are fixed to the inner surface of the left side surface portion 114 of the cover portion 11.
Further, 2 elastic members 1033 and 1034 are arranged between the right side surface portion 115 and the right end portion of the vibrator 102. At the right end portion of the mass body 6, the left end portion of the elastic member 1033 is fixed to the front end portion of the central portion 61 via the connecting member 83. The left end portion of the elastic member 1034 is fixed to the rear end portion of the central portion 61 via a connecting member 84. Right end portions of the elastic members 1033, 1034 are fixed to an inner surface of the right side surface portion 115 of the cover 11.
By disposing the elastic member 103 as described above, the shake of the vibrator 102 in the front-rear direction can be reduced. The vibrator 102 is not likely to rotate around a predetermined axis parallel to the left-right direction during vibration. Therefore, the vibrator 102 can vibrate stably.
However, the number of elastic members 103 is not limited to the above-described examples. The number of the elastic members 103 arranged on the left and right sides of the vibrator 102 may be one or more than 3.
The elastic member 103 is a coil spring that can expand and contract in the left-right direction. In the vibration motor 100 which is thin in the up-down direction, coil springs are suitably used. For example, in the case of assuming that a leaf spring having a V-shape when viewed from above is used, the width of the leaf spring in the up-down direction needs to be reduced in the thin vibration motor 100. However, in this way, the mechanical strength of the leaf spring may be reduced by fatigue due to repeated buckling of the leaf spring. On the other hand, in the case of using a coil spring in which a wire rod is formed in a coil shape, even in the vibration motor 100 which is thin in the up-down direction, the thickness of the wire rod constituting the coil spring may not be reduced as long as the outer diameter of the coil spring is reduced. Therefore, the elastic member 103 can maintain a sufficient strength.
Preferably, the material of the coil spring is piano wire. That is, the elastic member 103 is constituted by a piano wire. The piano wire has higher reliability such as strength and durability than hard steel wires, stainless steel wires, and the like. Therefore, by using the piano wire, the life of the elastic member 103 can be improved. The above-described example does not exclude a configuration in which the coil spring is made of a material other than piano wire. For example, the material may be a hard steel wire, a stainless steel wire, or the like.
The above examples do not exclude a configuration other than the coil spring as at least one of the elastic members 103. For example, at least any one of the elastic members 103 may be a plate spring.
In the vibration motor 100 having the above-described structure, by supplying a current to the coil 3 through the substrate 2, magnetic lines of force are generated in the coil 3, and the vibrator 102 can be driven in the left-right direction by interaction with the magnetic lines of force generated by the magnet member 7. By controlling the supply of an appropriate current to the coil 3 and the elastic force of the elastic member 103, the vibration motor 100 vibrates in the left-right direction.
< 1-5. Sliding part 9 >
Next, the slide member 9 will be described with reference to fig. 1 to 4.
The slide member 9 is disposed on an end surface of the mass body 6 in a direction intersecting the left-right direction. The sliding member 9 slides on the inner surface of the case 1 when contacting the inner surface of the case 1 when the vibrator 102 vibrates. In this way, even if the vibrator 102 vibrating in the left-right direction shakes to come into contact with the inner surface of the housing 1, the sliding member 9 slides smoothly on the inner surface. Thus, for example, even if an axis guiding the vibration of the vibrator 102 is not arranged, the vibration of the vibrator 102 can be suppressed or prevented from increasing and rotating vibration around a direction perpendicular to the left-right direction. The slide member 9 is disposed on an end surface of the mass body 6 in a direction intersecting the left-right direction. Therefore, it is not necessary to miniaturize the vibrator 102 or to enlarge the vibration motor 100 by securing a space for disposing the sliding member 9. Therefore, the vibrator 102 can be stably vibrated with a simple configuration.
The sliding member 9 is a film-like body. In this way, an increase in the size of the mass body 6 in the direction intersecting the left-right direction can be suppressed. Therefore, contact between the vibrator 102 and the inner surface of the case 1 can be suppressed, and an increase in size of the vibration motor 100 can be suppressed.
In the present embodiment, the sliding member 9 is in a film shape and is adhered to the surface of the mass body 6. However, the present invention is not limited to this example, and may be a thin belt-like belt shape. In this way, the sliding member 9 can be easily disposed on the surface of the mass body 6.
In the present embodiment, the material of the sliding member 9 is a fluororesin. In this way, the sliding characteristics of the sliding member 9 can be improved. The material of the slide member 9 is not limited to this example. The material of the sliding member 9 may be a material having a low friction coefficient and excellent sliding properties. Alternatively, the sliding member 9 may be a coating layer using a material having good lubricity such as molybdenum disulfide.
The slide member 9 is disposed on an end surface of the mass body 6 facing in the up-down direction and on an end surface of the mass body 6 facing in the front-rear direction perpendicular to the left-right direction and the up-down direction. For example, the slide member 9 is disposed on at least any one of the upper surface 601 and the lower surface 602 and at least any one of the front surface 603 and the rear surface 604 of the mass body 6. In this way, the slide member 9 is easily slid in the vibration direction (i.e., the left-right direction). In addition, for example, the runout of the rectangular mass body 6 can be effectively prevented.
In the present embodiment, the slide member 9 is disposed on both end surfaces 601 and 602 in the up-down direction of the mass body 6 and on both end surfaces 603 and 604 in the front-rear direction of the mass body 6. In this way, rotational shake around the up-down direction and rotational shake around the front-back direction can be more reliably prevented. Further, the mass body 6 can be prevented from directly sliding against the inner surface or the like of the housing 1, and generation of noise during sliding can be prevented.
For example, the slide member 9 has first slide members 91U, 91D and second slide members 92F, 92B.
The first slide member 91U is disposed on the upper surface 601 of the mass body 6. Specifically, the number of first sliding members 91U is 2, and the first sliding members are arranged in the left-right direction. The left first slide member 91U is disposed in a region 601L on the left side of the groove 64U in the upper surface 601 of the mass body 6. The first sliding member 91U on the left covers at least a part of the area 601L. The first slide member 91U on the right side is disposed in a region 601R on the right side of the groove 64U in the upper surface 601 of the mass body 6. The first slide member 91U on the right covers at least a part of the region 601R. By disposing the first sliding member 91U, for example, even if the vibrator 102 contacts the inner surface of the top surface portion 111 during vibration, the vibrator can smoothly slide on the inner surface of the top surface portion 111. Therefore, even if the vibrator 102 shakes upward, the influence on the vibration of the vibrator 102 can be reduced.
The first sliding member 91D is disposed on the lower surface 602 of the mass body 6. Specifically, the number of first sliding members 91D is 2, and the first sliding members are arranged in the left-right direction. The left first slide member 91D is disposed in a region 602L on the left side of the groove 64D in the lower surface 602 of the mass body 6. The first sliding member 91U on the left covers at least a part of the area 601L. The first slide member 91D on the right side is disposed in a region 602R on the right side of the groove 64D in the lower surface 602 of the mass body 6. The first slide member 91U on the right covers at least a part of the region 601R. By disposing the first sliding member 91D, even if the vibrator 102 contacts the inner surface of the bottom plate 12 during vibration, for example, the vibrator can smoothly slide on the inner surface of the bottom plate 12. Therefore, even if the vibrator 102 shakes downward, the influence on the vibration of the vibrator 102 can be reduced.
The second slide member 92F is disposed on the front surface 603 of the mass body 6, covering at least a part of the front surface 603. By disposing the second slide member 92F, for example, even if the vibrator 102 contacts the inner surface of the front surface portion 112 during vibration, the vibrator can smoothly slide on the inner surface of the front surface portion 112. Therefore, even if the vibrator 102 shakes forward, the influence on the vibration of the vibrator 102 can be reduced.
The second slide member 92B is disposed on the rear surface 604 of the mass body 6, covering at least a part of the rear surface 604. By disposing the second slide member 92B, for example, even if the vibrator 102 contacts the inner surface of the rear surface portion 113 during vibration, the vibrator can smoothly slide on the inner surface of the rear surface portion 113. Therefore, even if the vibrator 102 shakes backward, the influence on the vibration of the vibrator 102 can be reduced.
Preferably, the sliding members 9 are disposed at least at both ends in the left-right direction on the end surfaces of the mass body 6 in the direction intersecting the left-right direction. By disposing the sliding members 9 at both ends in the vibration direction, the pendulum rotation of the vibrator 102 can be prevented more reliably.
For example, the left first slide member 91U is disposed on at least the left end portion in the region 601L on the upper surface of the mass body 6 (see, for example, a portion L1 surrounded by a broken line in fig. 1). The first slide member 91U on the right side is disposed on at least the right end portion in the region 601R on the upper surface of the mass body 6 (for example, refer to a portion R1 surrounded by a broken line in fig. 1).
Similarly, the left first slide member 91D is disposed on at least the left end portion of the region 602L on the lower surface of the mass body 6. The first slide member 91D on the right side is disposed on at least the right end portion in the region 602R on the lower surface of the mass body 6.
The second slide member 92F is disposed at least at the left end portion (for example, see a portion L2 surrounded by a broken line in fig. 1) and the right end portion (for example, see a portion R2 surrounded by a broken line in fig. 1) of the front surface 603 of the mass body 6. Similarly, the second slide members 92B are disposed at least at the left and right end portions of the rear surface 604 of the mass body 6.
Further, it is preferable that the end portions of the sliding members 9 in the left-right direction have chamfer portions 94 whose corner portions are chamfered when viewed from the normal direction of the respective sliding members 9. In other words, the end portions of the slide member 9 in the left-right direction have curved edge portions protruding outward at the corner portions as viewed from the normal direction. By R chamfering the corners of the sliding member 9 arranged at the ends in the vibration direction, the sliding member 9 is less likely to be peeled off from the mass body 6 when sliding with the inner surface of the housing 1. Therefore, the lifetime of the sliding member 9 disposed on the surface of the mass body 6 can be increased.
For example, in the chamfer 94 at the end portions of the first sliding members 91U, 91D in the left-right direction, the corners are chamfered by R, as viewed from the up-down direction. In the corner portion, one end of the curved shape protruding outward when viewed from the vertical direction is connected to the edge portion extending in the left-right direction. The other end is connected to the edge portion extending in the front-rear direction.
In addition, in the chamfer 94 at the end portions of the second slide members 92F, 92B in the left-right direction as viewed in the front-rear direction, the corners are chamfered by R. In the corner portion, one end of the curved shape protruding outward when viewed from the front-rear direction is connected to the edge portion extending in the left-right direction. The other end is connected to the edge extending in the up-down direction.
However, the above-described example does not exclude a structure in which at least one corner of the end portion of the slide member 9 in the left-right direction is not chamfered when viewed from the normal direction of the at least one slide member 9.
It is preferable that the sliding members 9 are disposed at least at both ends in the front-rear direction on the end surfaces of the mass body 6 facing in the up-down direction. In this way, the vibrator 102 can be prevented from rotating and vibrating about a predetermined axis parallel to the vibration direction.
For example, the left first slide member 91U is disposed on the upper surface 601 of the mass body 6 at least at the front end portion (for example, see a portion L3 surrounded by a broken line in fig. 1) and the rear end portion (for example, see a portion L4 surrounded by a broken line in fig. 1) in the region 601L. The first slide member 91U on the right side is disposed on the upper surface of the mass body 6 at least at the front end portion (see, for example, a portion R3 surrounded by a broken line in fig. 1) and the rear end portion (see, for example, a portion R4 surrounded by a broken line in fig. 1) in the region 601R.
Similarly, the left first slide member 91D is disposed on at least the front end portion and the rear end portion in the region 602L on the lower surface of the mass body 6. The first slide member 91D on the right side is disposed on at least the front end portion and the rear end portion in the region 602R on the lower surface of the mass body 6.
This example does not exclude a configuration in which the sliding members 9 are not disposed at both ends in the front-rear direction on the end surfaces of the mass body 6 in the up-down direction. For example, at least one of the second slide members 92F and 92B may be omitted.
Next, the slide member 9 is preferably further provided with third slide members 93U, 93D having openings.
The third slide member 93U is disposed on the upward facing bottom surface 641U of the groove 64U, covering the bottom surface 641U. By disposing the third sliding member 93U, for example, even if the lower end portion of the first protection member 41 is in contact with the vibrator 102 when the vibrator 102 vibrates, the first protection member 41 can smoothly slide on the third sliding member 93U. Therefore, the influence on the vibration of the vibrator 102 can be reduced.
In the third slide member 93U, the edge of the opening overlaps the edge of the upper end of the through hole 63 when viewed in the vertical direction. Alternatively, the edge of the opening is disposed outside the edge of the upper end of the through hole 63 when viewed in the vertical direction. Thus, the upper surface of the magnet member 7 in the through hole 63 is not covered by the third slide member 93U, but is exposed to the inside of the housing 1. Thereby, the third sliding member 93U can be prevented from affecting the magnetic interaction between the first coil 31 and the magnet member 7.
The third sliding member 93D is disposed on the bottom surface 641D of the groove 64D facing downward, and covers the bottom surface 641D. By disposing the third slide member 93D, for example, even if the upper end portion of the second protection member 42 is in contact with the vibrator 102 when the vibrator 102 vibrates, the second protection member 42 can smoothly slide on the third slide member 93D. Therefore, the influence on the vibration of the vibrator 102 can be reduced.
In the third slide member 93D, the edge of the opening overlaps the edge of the lower end of the through hole 63 when viewed in the vertical direction. Alternatively, the edge of the opening is disposed outside the edge of the lower end of the through hole 63 when viewed in the vertical direction. Thus, the lower surface of the magnet member 7 in the through hole 63 is exposed to the inside of the housing 1 without being covered with the third slide member 93D. Thereby, the third sliding member 93D can be prevented from affecting the magnetic interaction between the second coil 32 and the magnet member 7.
However, the above-described example does not exclude a configuration in which the slide member 9 does not have at least one of the third slide members 93U, 93D. That is, at least one of the third sliding members 93U and 93D may be omitted.
< 2 > modification of the embodiment >
Next, a modification of the embodiment will be described with reference to fig. 5 to 7. Fig. 5 is a perspective view of a vibration motor 100 according to a modification of the embodiment. Fig. 6 is a sectional view of the vibration motor 100 along the dotted line VI-VI of fig. 5. Fig. 7 is an exploded perspective view of the vibration motor 100 of fig. 5. In fig. 5, a first housing 13 described later is shown in a transparent manner. In the following, a structure different from the above embodiment in the modification will be described. The same reference numerals are given to the same components as those of the above embodiments, and the description thereof may be omitted.
< 2-1 stator 101 >
The stator 101 includes a housing 1, a substrate 2, and a coil 3. That is, in the modification, the protection member 4 is omitted. However, the following modification does not exclude the structure in which the stator 101 includes the protection member 4.
The housing 1 has a first housing 13 and a second housing 14. The second housing 14 is mounted below the first housing 13. That is, the first housing 13 is mounted from above the second housing 14 to constitute the housing 1. The coil 3, the vibrator 102, and the elastic member 103 are housed in a space surrounded by the first case 13 and the second case 14.
The first housing 13 has a top surface portion 131. The top surface 131 is plate-shaped and extends in a direction intersecting the vertical direction. For example, the top surface 131 has a plate shape extending in the left-right direction and the front-rear direction, and faces the vibrator 102 with a gap therebetween in the up-down direction. The first coil 31 is fixed to the lower surface of the top surface portion 131.
In addition, the first housing 13 further has a front side surface portion 132 and a rear side surface portion 133. The front side surface portion 132 and the rear side surface portion 133 extend downward from the edge portion in the front-rear direction of the top surface portion 131. The front side surface 132 and the rear side surface 133 have a plate shape extending in the left-right direction, and are opposed to the vibrator 102 with a gap therebetween in the front-rear direction. The front side surface 132 is disposed forward of the rear side surface 133. The bent portions 22, 23 of the substrate 2 are arranged on the front side surface 132.
In addition, the first housing 13 has a recess 1311. The concave portions 1311 are disposed at both lateral end portions of the top surface portion 131, and are recessed in the lateral direction (inward).
In addition, the first housing 13 has a first opening 1312. The first opening 1312 is disposed on the top surface 131. The first opening 1312 penetrates the top surface portion 131 in the up-down direction and extends in the front-back direction, and further opens toward the front end portion of the top surface portion 131. As shown in fig. 1 and the like, the front end of the first opening 1312 is connected to the outlet of the front side surface 132.
The second housing 14 has a bottom surface portion 141. The bottom surface portion 141 is plate-shaped and extends in a direction intersecting the vertical direction. For example, the bottom surface 141 is a plate-like member extending in the left-right direction and the front-rear direction, and faces the vibrator 102 with a gap therebetween in the up-down direction. The second coil 32 is fixed to the upper surface of the bottom surface 141.
In addition, the second housing 14 also has a left side surface portion 142 and a right side surface portion 143. Hereinafter, the left side surface portion 142 and the right side surface portion 143 may be collectively referred to as "side surface portions 142 and 143". For example, the side portions 142, 143 extend upward from both edges of the bottom portion 141 in the left-right direction. The left side surface portion 142 and the right side surface portion 143 have a plate shape extending in the front-rear direction, and are opposed to the vibrator 102 with a gap therebetween in the left-right direction. The left side surface 142 is disposed to the left of the right side surface 143.
In addition, the second housing 14 has a second opening 1411. The second opening 1411 is disposed in the bottom portion 141. The second opening 1411 penetrates the bottom surface portion 141 in the up-down direction and extends in the front-rear direction, for example, toward the front end portion of the bottom surface portion 141.
The second housing 14 has a convex portion 144 fitted into the concave portion 1311. The protruding portion 144 is disposed at the upper end of the left side surface portion 142 and the upper end of the right side surface portion 143, and protrudes upward.
In the case 1 of fig. 5 and 7, the concave portion 1311 is disposed on the top surface portion 131, and the convex portion 144 is disposed on the side surface portions 142, 143. However, the present invention is not limited to this example, and the concave portion 1311 may be disposed on the side surface portions 142 and 143, and the convex portion 144 may be disposed on the top surface portion 131. That is, the recess 1311 may be disposed at one of the lateral end portions of the top surface portion 131 and the upper end portions of the side surface portions 142 and 143. Further, the convex portion 144 fitted into the concave portion 1311 may be disposed at the other one of the left-right direction end portion of the top surface portion 131 and the upper end portions of the side surface portions 142, 143.
According to the structure of the housing 1 described above, the housing 1 can be easily formed, so that the manufacturing cost can be reduced, and the productivity of the housing 1 can be improved. For example, the first housing 13 can be formed by forming the first opening 1312 and one of the concave portion 1311 and the convex portion 144 (bending both ends in the front-rear direction downward) in the plate material. Further, the second case 14 can be formed by bending both ends in the left-right direction of the other plate material in which the second opening 1411 and the other of the concave portion 1311 and the convex portion 144 are formed upward. Further, the first housing 13 can be attached to the second housing 14 by fitting the convex portions 144 into the concave portions 1311 at both end portions of the top surface portion 131 in the lateral direction.
In addition, the second housing 14 has a protruding piece 145. The protruding piece 145 extends toward the outside of the housing 1 at an end portion in one direction perpendicular to the up-down direction of the second housing 14, holding the substrate 2.
For example, the protruding piece 145 protrudes forward from the front edge of the bottom surface 141, and expands in the left-right direction. The base 21 of the substrate 2 is disposed on the protruding piece 145.
Next, the coil 3 has a winding portion 301 and a lead wire 302. The winding portion 301 is formed of a coil-shaped wire. The lead wires 302 are led out from the winding portion 301 and are arranged on the case 1 side in the up-down direction with respect to the winding portion 301. The lead wires 302 are accommodated in openings 1312 and 1411 provided in the case 1. In the first housing 13, the openings 1312 and 1411 are collectively referred to as a first opening 1312 and a second opening 1411.
In this way, since the lead wires 302 of the coil 3 are arranged on the case 1 side in the up-down direction with respect to the winding portion 301, the interval between the magnet member 7 and the winding portion 301 of the coil 3 can be further reduced. Therefore, the lorentz force acting on the magnet member 7 can be further increased when the coil 3 is energized, and therefore the moving speed and the vibration width of the vibrator 102 can be further increased. Since the lead wires 302 are accommodated in the openings 1312 and 1411 provided in the case 1, a gap between the case 1 and the coil 3 is not required. Therefore, the vertical dimension of the vibration motor 100 can be further reduced. Therefore, the output of the vibration motor 100 can be further increased while miniaturizing the vibration motor 100.
In this case, insulating members such as a resin material and an adhesive may be disposed in the openings 1312 and 1411 for housing the lead wires 302. That is, the openings 1312 and 1411 may be filled with the insulating material. Thus, the coil 3 can be prevented from being exposed to the outside of the case 1 through the openings 1312 and 1411. Therefore, the electrical insulation of the vibration motor 100 can be improved. Further, dust and the like can be prevented from entering the inside of the case 1 through the openings 1312 and 1411. Therefore, the vibrator 102 can be prevented or prevented from being unable to move due to dust or the like existing between the stator 101 and the vibrator 102.
The shape of the openings 1312 and 1411 as viewed from the up-down direction is not limited to fig. 5 to 7. The shape may be an oval shape extending in the front-rear direction, a perfect circle shape, or an n-side shape extending in the front-rear direction (n is an integer of 3 or more).
For example, the first coil 31 has a first lead wire 302U. The first lead wire 302U is led out from the winding portion 301 of the first coil 31 and is disposed above the winding portion 301. The winding portion 301 of the first coil 31 is an example of the "first winding portion" of the present invention. In addition, the first lead wire 302U is received in the first opening 1312. As previously described, the first housing 13 has the first opening 1312.
The second coil 32 has a second lead wire 302D. The second lead wire 302D is led out from the winding portion 301 of the second coil 32 and is arranged below the winding portion 301. The winding portion 301 of the second coil 32 is an example of the "second winding portion" of the present invention. In addition, the second lead wire 302D is received in the second opening 1411. As previously described, the second housing 14 has the second opening 1411.
In this way, the gap between the first housing 13 and the first coil 31 is not required, and the gap between the magnet member 7 and the winding portion 301 of the first coil 31 can be further reduced. In addition, the gap between the second case 14 and the second coil 32 is not required, and the gap between the magnet member 7 and the winding portion 301 of the second coil 32 can be further reduced. Therefore, even in the structure in which the coils 3 are arranged on both sides of the magnet member 7 in the vertical direction, the vertical dimension of the vibration motor 100 can be further reduced, and the output of the vibration motor 100 can be further increased.
Here, the first opening 1312 also faces one direction perpendicular to the up-down direction of the first housing 13 at an end portion thereof. For example, the first opening 1312 also opens forward at the end on the front side perpendicular to the left-right direction and the up-down direction. In this way, the first lead wire 302U can be easily led out to the outside of the case 1.
As shown in fig. 5 and the like, the width of the front end portion of the first opening 1312 in the lateral direction is wider than the width of the rear side portion of the first opening 1312 in the lateral direction. For example, the left end portion of the front end portion of the first opening 1312 is disposed to the left of the left end portion of the rear side portion of the first opening 1312. In other words, the first housing 13 has a left concave portion (reference numeral omitted) recessed leftward from the front end portion of the first opening 1312. The right end portion of the front end portion of the first opening 1312 is disposed right of the right end portion of the rear side portion of the first opening 1312. In other words, the first housing 13 has a right concave portion (reference numeral omitted) recessed rightward from the front end portion of the first opening 1312. In this way, the substrate side of the first lead wire 302U is less likely to contact the top surface portion 131 of the first housing 13. Therefore, the first lead wire 302U can be made less likely to break.
A part of the second opening 1411 is disposed on the protruding piece 145 and is located inside the outer edge of the protruding piece 145. For example, the tip end portion of the second opening 1411 is disposed on the protruding piece 145 and is located inside the outer edge portion (particularly, the tip end portion) of the protruding piece 145. In this way, the second lead wire 302D can be easily led out to the outside of the case 1. In addition, since the second opening 1411 does not reach the outer edge portion of the protruding piece 145, the strength of the protruding piece 145 can be suppressed from decreasing.
Further, when the vibration motor 100 is stopped, the central positions of the openings 1312 and 1411 in the left-right direction are preferably arranged so as to be offset from the central position of the winding portion 301 in the left-right direction toward the lead line 302. For example, as shown in fig. 6, when the vibration motor 100 is stopped, the center position in the left-right direction of the first opening 1312 is offset from the center position in the left-right direction of the winding portion 301 of the first coil 31 toward the first lead line 302U. The center position in the lateral direction of the second opening 1411 is offset from the center position in the lateral direction of the winding portion 301 of the second coil 32 toward the second lead line 302D.
The lead wires 302 disposed on the case 1 side in the up-down direction with respect to the winding portion 301 are usually end portions of conductors that start winding when the winding portion 301 is manufactured, and are led out from a portion (for example, an outer edge portion of a hollow formed in the center of the coil-shaped winding portion 301) that is offset from the center position of the winding portion 301 to the outside of the case 1. Therefore, by shifting the center positions of the openings 1312 and 1411 as described above, it is easy to dispose the lead wires 302 extending in the front-rear direction at the center positions of the openings 1312 and 1411 in the left-right direction when the vibration motor 100 is stopped. Therefore, when the vibration motor 100 is driven, the lead wires 302 can be suppressed or prevented from contacting (portions along the outer edge portions of the openings 1312, 1411) of the casing 1.
However, the arrangement positions of the openings 1312 and 1411 in the left-right direction are not limited to the above-described example, and may be, for example, arranged at positions overlapping the coil 3 in the up-down direction.
< 2-3 vibrator 102 >)
In the modification, the material of the mass body 6 of the vibrator 102 is, for example, a metal such as aluminum or iron or an alloy thereof. However, the material of the mass body 6 is not limited to this example, and may be a high-density metal such as tungsten or an alloy thereof.
In addition, the mass body 6 preferably further has a plurality of corner recesses 66. Each corner recess 66 is recessed from each corner of the through hole 65 in a direction perpendicular to the up-down direction. For example, in fig. 5 and 7, the through hole 65 is rectangular when viewed from the up-down direction. The corner recesses 66 are arranged at four corners of the rectangular through-hole 65, respectively, and are recessed in a direction perpendicular to the vertical direction (for example, the left-right direction and/or the front-rear direction) toward the outside of the through-hole 65 when viewed from the vertical direction. In this way, each corner of the through hole 65 may not be formed as a pin corner (corner of a sharp shape at the tip) when viewed from the vertical direction. Therefore, even if the magnet member 7 has the same polygonal shape (for example, rectangular shape) as the through-hole 65 when viewed from the vertical direction, the through-hole 65 accommodating the magnet member 7 can be easily formed. This example does not exclude a configuration in which the corner recess 66 is not disposed in at least one corner of the through hole 65 having a polygonal shape when viewed from the vertical direction.
In addition, the mass body 6 preferably further has a protruding portion 67. The protruding portion 67 protrudes in the front-rear direction at a left-right direction central portion of at least one end portion in the front-rear direction perpendicular to the left-right direction and the up-down direction, and faces the housing 1 in the front-rear direction. For example, the mass body 6 has at least one of the front protruding portion 67 and the rear protruding portion 67. The front protruding portion 67 protrudes forward at the left-right direction center portion of the front end portion of the mass body 6, and faces the front side surface portion 132 of the first housing 13 in the front-rear direction. The rear protruding portion 67 protrudes rearward at the left-right direction central portion of the rear end portion of the mass body 6, and faces the rear side surface portion 133 of the first housing 13 in the front-rear direction.
In this way, even if the vibrator 102 vibrating in the left-right direction moves in the front-rear direction, the protruding portion 67 abuts against the case 1, and the corner portion (front-rear direction end) of the left-right direction end portion of the mass body 6 can be prevented from contacting the case 1. Therefore, the vibrator 102 can smoothly vibrate. In addition, the influence on the members (for example, the connecting member 8 and the elastic member 103) disposed near the corners of the right and left direction ends of the mass body 6 can be reduced or prevented.
In the modification, a step is provided at the lateral end of the mass body 6 and at the front-rear end thereof. The step is composed of a first face, a second face and a third face. The first surface is disposed at the front-rear direction end of the mass body 6 and faces in the up-down direction. The second surface is disposed at the center of the mass body 6 in the front-rear direction and faces in the up-down direction. The third surface connects the front-rear direction inner side end of the first surface and the front-rear direction outer side end of the second surface.
The connecting members 8 are disposed at the front-rear direction both ends of the left-right direction both ends of the central portion 61 at positions outside the steps in the front-rear direction, respectively. That is, the connection member 8 is disposed in contact with the first surface. At this time, the connection member 8 is disposed so as to be separated from the third surface in the front-rear direction and outward direction. In this way, even if the pin angle is not formed between the first surface and the third surface, the connecting member 8 does not float from the first surface and can be brought into contact with the first surface. Therefore, the attachment strength of the connecting member 8 to the central portion 61 of the mass body 6 can be improved.
Next, the vibrator 102 of the modification further includes a buffer member B. The buffer member B is disposed at least at one of both ends of the mass body 6 in the lateral direction. The material of the buffer member B is thermoplastic polyurethane. However, the present invention is not limited to this example, and a material having high cushioning properties may be used for the cushioning material B. For example, the material of the cushion member B may be a porous body deformable as a resin foam, or may be an elastic member such as rubber. In this way, the mass body 6 can be prevented from contacting the housing 1 in at least any one of the left-right directions. In addition, even if the vibrator 102 contacts the case 1 in at least any one of the left and right directions, the occurrence of impact sound at this time can be suppressed or prevented.
< 3. Electronic device 200 >)
The vibration motor 100 of the first and second embodiments described above may be mounted on, for example, an electronic device 200 schematically shown in fig. 8. That is, the electronic apparatus 200 has the vibration motor 100. The electronic apparatus 200 is an apparatus that applies tactile stimulus to a person who operates the electronic apparatus 200 by vibration of the vibration motor 100. The electronic device 200 shown in fig. 8 is a smart phone as an example, but a tablet computer, a game device, a wearable terminal, and the like may be employed in addition to this.
In the case of the electronic apparatus 200 shown in fig. 8, various notifications such as an incoming call can be made to the operator or tactile feedback can be provided to the operator by outputting vibrations by the vibration motor 100. As the tactile feedback, for example, when the concave portion 201 shown in fig. 8 is pressed, the vibration motor 100 outputs vibration, whereby the operator can obtain a feeling like pressing a button. In particular, by using the vibration motor 100 according to the above embodiment, the coil 3 can be protected, and the problem of vibration of the electronic device 200 caused by the problem of the coil 3 can be suppressed.
< 4. Other >
The embodiments of the present invention have been described above. The scope of the present invention is not limited to the above embodiment. The present invention can be implemented by applying various modifications to the above-described embodiments within a range not departing from the gist of the invention. The matters described in the above embodiments can be appropriately combined in any range where no contradiction occurs.
For example, the vibration motor 100 (see fig. 1, for example) of the embodiment does not have the protruding portion 67 (see fig. 5, for example) of the modification example, but is not limited to this example, and may have the protruding portion 67. At this time, the second slide members 92F, 92B are preferably disposed on the front-rear outer side surfaces of the protruding portion 67. The vibration motor 100 (see fig. 1, for example) of the embodiment does not have the buffer member B (see fig. 5, for example) of the modification example, but is not limited to this example, and may have the buffer member B.
< 5. Summary >
The embodiments described above are generally described below.
For example, the vibration motor disclosed in the present specification adopts the following structure (first structure):
the vibration motor has:
a stator; and
a vibrator capable of vibrating in a first direction,
the stator has:
a coil facing the vibrator in a second direction perpendicular to the first direction; and
a case accommodating the coil and the vibrator,
the vibrator has:
a mass extending along the first direction;
a magnet member fixed to the mass body and facing the coil in the second direction; and
and a sliding member disposed on an end surface of the mass body in a direction intersecting the first direction, the sliding member sliding on an inner surface of the case when the sliding member contacts the inner surface of the case when the vibrator vibrates.
Alternatively, the vibration motor disclosed in the present specification adopts the following structure (second structure):
the vibration motor has:
a stator; and
a vibrator capable of vibrating in a first direction,
the stator has:
a coil facing the vibrator in a second direction perpendicular to the first direction; and
a case accommodating the coil and the vibrator,
the vibrator has:
a mass extending along the first direction; and
a magnet member fixed to the mass body and facing the coil in the second direction,
the coil has a lead wire led out from a winding portion formed of a coil-shaped wire, the lead wire being disposed on the side of the case in the second direction with respect to the winding portion,
the housing has an opening that receives the lead-out wire.
In addition, the following structure (third structure) may be adopted: in the vibration motor of the second structure, the vibrator further has a sliding member disposed on an end surface of the mass body in a direction intersecting the first direction,
the sliding member slides on the inner side surface of the housing when the vibrator is in contact with the inner side surface of the housing when vibrating.
In addition, the following structure (fourth structure) may be adopted: in the vibration motor of the first or third configuration, the sliding member is disposed on an end face of the mass body facing in the second direction and an end face of the mass body facing in a third direction perpendicular to the first direction and the second direction.
In addition, the following structure (fifth structure) may be adopted: in the vibration motor of the fourth configuration, the sliding members are disposed on both end surfaces of the mass body in the second direction and both end surfaces of the mass body in the third direction.
In addition, the following structure (sixth structure) may be adopted: in the vibration motor according to any one of the first, third, and fifth configurations, the sliding members are disposed at least at both end portions in the first direction on end surfaces of the mass body in a direction intersecting the first direction.
In addition, the following structure (seventh structure) may be adopted: in the vibration motor of any one of the first and third to sixth structures, a width of the mass body in the second direction is narrower than a width of the mass body in a third direction perpendicular to the first direction and the second direction,
the sliding members are disposed at least at both ends in the third direction on an end face of the mass body facing the second direction.
In addition, the following structure (eighth structure) may be adopted: in the vibration motor of any one of the first and third to seventh structures, the sliding member is a film-like body.
In addition, the following structure (ninth structure) may be adopted: in the vibration motor according to the eighth aspect, an end portion of the sliding member in the first direction has a chamfered portion in which a corner is chamfered, when viewed from a normal direction of the sliding member.
In addition, the following structure (tenth structure) may be adopted: in the vibration motor of any one of the first and third to ninth structures, the material of the sliding member is a fluororesin.
In addition, the following structure (eleventh structure) may be adopted: in the vibration motor of any one of the first to tenth structures, the stator further has a protection member covering at least an end portion of the coil in the first direction,
an end portion of the protective member on the vibrator side in the second direction is disposed on the vibrator side in the second direction with respect to the coil.
In addition, the following structure (twelfth structure) may be adopted: in the vibration motor of any one of the first to eleventh structures,
The coil has:
a first coil disposed at a position closer to one of the second directions than the magnet member; and
and a second coil disposed at the other side of the second direction with respect to the magnet member.
In addition, the following structure (thirteenth structure) may be adopted: in the vibration motor of any one of the second to eleventh structures,
the coil has:
a first coil disposed at a position closer to one of the second directions than the magnet member; and
a second coil disposed at the other side of the second direction with respect to the magnet member,
the first coil has a first lead wire led out from a first winding portion, the first lead wire being arranged at a position closer to one of the second directions than the first winding portion,
the second coil has a second lead wire led out from a second winding portion, the second lead wire being arranged at the other side of the second winding portion in the second direction,
the housing has:
a first housing having a first opening for receiving the first lead wire; and
and a second housing having a second opening for receiving the second lead wire, the second housing being attached to the other of the first housing in the second direction.
In addition, the following structure (fourteenth structure) may be adopted: in the vibration motor of the thirteenth structure,
the first housing has a plate-like top surface portion that expands in a direction intersecting the second direction,
the second housing has:
a plate-shaped bottom surface portion that extends in a direction intersecting the second direction; and
side portions extending from both ends of the bottom portion in the first direction toward one of the second directions, respectively,
a concave portion is arranged at one of the first-direction end portion of the top surface portion and the second-direction end portion of the side surface portion,
a convex portion fitted into the concave portion is disposed at the other of the end portion of the top surface portion in the first direction and the end portion of the side surface portion in the second direction.
In addition, the following structure (fifteenth structure) may be adopted: in the vibration motor of the thirteenth or fourteenth structure, the first opening may also be open to one direction of the first housing perpendicular to the second direction at an end of the one direction.
In addition, the following structure (sixteenth structure) may be adopted: in the vibration motor of any one of the thirteenth to fifteenth structures,
The vibration motor further has a substrate on which wiring electrically connected to the coil is mounted,
the second housing has a protruding piece extending toward the outside of the housing at an end of the second housing in one direction perpendicular to the second direction, the protruding piece holding the substrate,
and a part of the second opening is arranged on the protruding piece and positioned at an inner side than an outer edge part of the protruding piece.
In addition, the following structure (seventeenth structure) may be adopted: in the vibration motor of any one of the thirteenth to sixteenth structures,
when the vibration motor is stopped, a center position of the opening in the first direction is offset from a center position of the winding portion in the first direction toward the lead wire side.
In addition, the following structure (eighteenth structure) may be adopted: in the vibration motor of any one of the first to seventeenth structures,
the vibration motor further has an elastic member connecting the vibrator and the stator,
the elastic member is disposed between both ends of the mass body in the first direction and an inner surface of the housing,
the elastic members are disposed at both ends of the mass body in a third direction perpendicular to the first direction and the second direction, respectively, at the respective ends in the first direction.
In addition, the following structure (nineteenth structure) may be adopted: in the vibration motor of any one of the first to eighteenth structures,
the vibration motor further has an elastic member connecting the vibrator and the stator,
the elastic member is a coil spring that is stretchable in the first direction.
In addition, the following structure (twentieth structure) may be adopted: in the vibration motor of the nineteenth structure, the material of the coil spring is a piano wire.
In addition, the following structure (twenty-first structure) may be adopted: in the vibration motor of any one of the first to twentieth structures,
the mass body has:
a through hole having a polygonal shape when viewed from the second direction, the through hole accommodating the magnet member; and
and a plurality of corner recesses recessed from each corner of the through hole in a direction perpendicular to the second direction.
In addition, the following structure (twenty-second structure) may be adopted: in the vibration motor of any one of the first to twenty-first structures,
the mass body further has a protruding portion protruding in the third direction at a first direction center portion of at least one side end portion of the third direction perpendicular to the first direction and the second direction and opposing the housing in the third direction.
In addition, the following structure (twenty-third structure) may be adopted: in the vibration motor of any one of the first to twenty-second structures,
the third directional width of the coil is wider than the third directional width of the magnet member.
In addition, the following structure (twenty-fourth structure) may be adopted: in the vibration motor of any one of the first to twenty-third structures,
the vibrator further includes a buffer member disposed at least one of both end portions of the mass body in the first direction.
Hereinafter, exemplary embodiments will be described with reference to the drawings.
(1) A vibration motor, comprising:
a stator;
a vibrator capable of vibrating at least in a first direction; and
an elastic member connecting the vibrator and the stator,
the stator has a coil opposed to the vibrator in a second direction perpendicular to the first direction,
the vibrator has:
a mass extending along the first direction;
a magnet member fixed to the mass body and facing the coil in the second direction; and
a connecting member connecting the mass body and the elastic member,
The material of the connecting part is different from the material of the mass body.
(2) The vibration motor according to (1), wherein at least any one of hardness and rigidity of a material of the connecting member is smaller than the mass body.
(3) The vibration motor according to (1), wherein the connecting member is fixed to the mass body via a first adhesive.
(4) The vibration motor according to any one of (1) to (3), wherein one of the elastic member and the connecting member has a protruding portion, and the other has a receiving portion for receiving the protruding portion.
(5) The vibration motor according to (4), wherein the connecting member has the protruding portion and a hole portion provided with a second adhesive, and at least a part of the hole portion is opened toward the elastic member in the fixing portion of the elastic member and the connecting member.
(6) The vibration motor according to (5), wherein the hole portion is a through hole.
(7) The vibration motor according to (5), wherein the connection member further has a groove portion arranged around the protruding portion and extending along an outer periphery of the protruding portion, the third adhesive is arranged in the groove portion, and the groove portion is opened toward the elastic member in the elastic member and the fixed portion of the connection member.
(8) The vibration motor according to (7), wherein the groove portion is connected to the hole portion.
(9) The vibration motor according to (7), wherein a part of the elastic member is fitted into the groove portion.
(10) The vibration motor according to any one of (1) to (3), wherein the elastic member is a coil spring that is stretchable in the first direction.
(11) The vibration motor according to any one of (1) to (3), wherein the elastic member is a coil spring that is stretchable in the first direction, and the connection member has a cylindrical portion protruding in the first direction, the cylindrical portion accommodating an end portion of the coil spring in the first direction.
In the present specification, in the drawings, the longitudinal direction of the vibration motor 100 is shown as X in the X-axis direction. The left side of the drawing in the X-axis direction is shown as X1, and the right side is shown as X2. The width direction of the vibration motor 100 is shown as Y in the Y-axis direction. The front of the drawing in the Y-axis direction is shown as Y1, and the rear is shown as Y2. The thickness direction of the vibration motor 100 is set to the Z-axis direction. The upper side of the drawing in the Z-axis direction is shown as Z1, and the lower side is shown as Z2. The X-axis direction, the Y-axis direction, and the Z-axis direction are orthogonal to each other.
The X-axis direction is an example of the "first direction" of the present invention, and is referred to as "left-right direction" in the present specification. The Y-axis direction is an example of the "third direction" of the present invention, and is referred to as the "front-rear direction" in the present specification. The Z-axis direction is an example of the "second direction" of the present invention, and is referred to as "up-down direction" in the present specification.
In addition, the term "parallel" in the positional relationship of any one of the azimuth, the line, and the plane with any other one includes not only a state where both are completely disjoint wherever they extend, but also a substantially parallel state. In addition, "perpendicular" and "orthogonal" include not only a state in which both intersect each other at 90 degrees, but also a substantially perpendicular state and a substantially orthogonal state, respectively. That is, the terms "parallel", "perpendicular" and "orthogonal" include a state in which the positional relationship of the two is angularly offset to an extent that does not deviate from the gist of the present invention.
These are for illustration only, and are not intended to limit the actual positional relationship, direction, names, etc.
< 1. Embodiment >
1-1. Integral Structure of vibration Motor 100 >, and method for manufacturing the same
Fig. 1 is a perspective view of a vibration motor 100 according to an exemplary embodiment of the present invention. Fig. 9 is a sectional view of the vibration motor 100 along the dash-dot line II-II of fig. 1. Fig. 10 is an exploded perspective view of the vibration motor 100. In fig. 1, a lid 11 described later is shown in a transparent manner.
The vibration motor 100 is a so-called lateral linear vibration motor capable of generating vibrations in the lateral direction. The vibration motor 100 includes a stator 101, a vibrator 102, and an elastic member 103.
1-2 stator 101 >, stator
The stator 101 includes a housing 1, a substrate 2, a coil 3, and a protective member 4.
The case 1 houses the coil 3, the vibrator 102, and the like. The case 1 is made of a metal material such as stainless steel. However, the material of the case 1 is not limited to this example, and may be resin.
The housing 1 has a cover 11 and a bottom plate 12. The cover 11 is attached from above the bottom plate 12 to form the housing 1. The cover 11 has a rectangular body shape with a lower opening. The cover 11 includes a top surface 111, a front surface 112, a rear surface 113, a left surface 114, and a right surface 115. The top surface 111 has a plate shape extending in the left-right direction and the front-rear direction, and faces the vibrator 102 with a gap therebetween in the up-down direction. The front side surface 112, the rear side surface 113, the left side surface 114, and the right side surface 115 extend downward from the edge of the top surface 111. The front side surface 112 and the rear side surface 113 are plate-shaped extending in the left-right direction, and are opposed to the vibrator 102 with a gap therebetween in the front-rear direction. The front side surface 112 is disposed forward of the rear side surface 113. The left side surface 114 and the right side surface 115 are plate-shaped extending in the front-rear direction, and are opposed to the vibrator 102 with a gap therebetween in the left-right direction. The bottom plate 12 is a plate-like member extending in the left-right direction and the front-rear direction, and is opposed to the vibrator 102 with a gap therebetween in the up-down direction. The left side surface 114 is disposed to the left of the right side surface 115. The vibrator 102, the coil 3, the protection member 4, and the elastic member 103 are housed in a space surrounded by the cover 11 and the bottom plate 12.
The substrate 2 is, for example, an FPC (flexible printed circuit board). However, this illustration does not exclude a structure in which the substrate 2 is not an FPC. For example, the substrate 2 may be a rigid (rib) substrate such as a glass epoxy substrate.
The housing 1 has a base 21 and bending portions 22 and 23 bent with respect to the base 21. The bottom plate 12 has a protruding piece 121 protruding forward from the front edge. The base 21 is disposed on the protruding piece 121. The bent portions 22 and 23 are disposed along the front side surface portion 112 of the cover 11. The coil 3 is electrically connected to the substrate 2. The substrate 2 is provided for supplying current to the coil 3.
The coil 3 is opposed to the vibrator 102 in the up-down direction perpendicular to the left-right direction. The coil 3 has a first coil 31 and a second coil 32. The first coil 31 is disposed above the second coil 32. The first coil 31 and the second coil 32 are configured by winding a wire around an axis along the up-down direction. Magnetic force lines are generated by supplying current to the first coil 31 and the second coil 32.
The lead wires of the coil 3 are led out from the lead openings provided in the front surface portion 112 of the cover 11, and are connected to the electrode portions 22A, 23A provided in the bent portions 22, 23 of the substrate 2. The electrode portion 22A is connected to an electrode portion 21A provided on the base 21 through a wiring, not shown, provided on the substrate 2. The electrode portion 23A is connected to an electrode portion 21B provided on the base 21 via a wiring, not shown, provided on the substrate 2. The current supplied to the coil 3 is in accordance with the electrode portion 21A (or 21B) Electrode portion 22A (or 23A)/(S)>Coil 3->Electrode portion 23A (or 22A)/(S)>The electrode portions 21B (or 21A) sequentially flow.
The protection member 4 covers at least the end portions in the left-right direction of the coil 3. In the present embodiment, the protection member 4 is made of, for example, resin, and surrounds and protects the coil 3. The protection member 4 has a first protection member 41 and a second protection member 42. The first protective member 41 surrounds the first coil 31. The first coil 31 and the first protective member 41 are disposed on the lower surface of the top surface portion 111 of the cover 11, and are opposed to the vibrator 102 with a space therebetween in the up-down direction. In addition, the second protection member 42 surrounds the second coil 32. The second coil 32 and the second protective member 42 are disposed on the upper surface of the base plate 12, and are opposed to the vibrator 102 with a gap therebetween in the up-down direction.
The end portion of the protection member 4 on the vibrator 102 side in the up-down direction is disposed on the vibrator 102 side in the up-down direction with respect to the coil 3. For example, the lower end portion of the first protection member 41 is disposed below the lower end portion of the first coil 31. The upper end portion of the second protection member 42 is disposed above the upper end portion of the second coil 32. In this way, even if the vibrator 102 shakes in the up-down direction, contact with the coil 3 can be prevented by the protection member 4 coming into contact with the vibrator 102. Further, the protector 4 slides on the sliding member 9 described later, so that the vibrator 102 can be vibrated stably.
< 1-3 vibrator 102 >)
The vibrator 102 is capable of vibrating at least in the left-right direction. The vibrator 102 includes a mass body 6, a magnet member 7, a connection member 8, and a sliding member 9.
The mass body 6 is made of tungsten or an alloy thereof, for example, and increases the weight of the vibrator 102 to thereby increase the vibration output of the vibration motor 100. The mass body 6 extends in the left-right direction. In addition, the mass body 6 expands in the front-rear direction and has a thickness in the up-down direction. For example, the width of the mass body 6 in the up-down direction is narrower than the width in the front-back direction perpendicular to the left-right direction and the up-down direction. This makes it possible to thin the vibration motor 100 in the vertical direction.
The mass body 6 has a central portion 61 and 2 side body portions 621, 622. Hereinafter, the side body portions 621 and 622 may be collectively referred to as "side body portion 62". The central portion 61 and the side body portions 621, 622 are each rectangular in shape when viewed in the up-down direction. However, this example does not exclude a structure in which at least one of the central portion 61 and the side body portions 621 and 622 is not rectangular. The central portion 61 and the side body portions 621 and 622 may have shapes that are not inconsistent with the gist of the present invention.
The central portion 61 and the side body portions 621, 622 are integral and one piece. The center portion 61 is a portion at the center of the mass body 6 in the lateral direction. The left side body 621 protrudes leftward from the center portion 61. The left end portion of the side body portion 621 faces the left side surface portion 114 with a sufficient distance therebetween in the left-right direction. The right side body 622 protrudes rightward from the center portion 61. The right end portion of the side body 622 is opposed to the right side surface portion 115 with a sufficient distance therebetween in the left-right direction. The front ends of the side body portions 621 and 622 are disposed rearward of the front end of the central portion 61. Rear end portions of the side body portions 621 and 622 are disposed forward of the rear end portion of the central portion 61.
The mass body 6 has grooves 64U and 64D. The grooves 64U and 64D are disposed at the left-right direction central portions of the upper and lower surfaces of the mass body 6, respectively, and extend in the front-rear direction. The groove 64U is disposed on the upper surface 601 of the central portion 61 and is recessed downward. The groove 64D is disposed on the lower surface 602 of the central portion 61 and is recessed upward. The front ends of the grooves 64U, 64D reach the front end of the central portion 61, respectively. The rear end portions of the grooves 64U, 64D reach the rear end portion of the central portion 61, respectively.
The first coil 31 and the first protection member 41 are disposed inside the groove 64U, and are opposed to the upward-facing bottom surface 641U of the groove 64U with a gap therebetween in the vertical direction. The second coil 32 and the second protection member 42 are disposed inside the groove 64D, and are opposed to the bottom surface 641D of the groove 64D facing downward with a gap therebetween in the vertical direction. This makes it possible to further thin the vibration motor 100. In addition, since electromagnetic force can be obtained by the upper and lower coils 3, vibration output is improved.
The mass body 6 has a through hole 65. The through hole 65 penetrates in the vertical direction between the bottom surfaces 641U, 641D of the grooves 64U, 64D facing each other in the vertical direction. The upper end of the through hole 65 opens to the upward bottom 641U of the groove 64U. The lower end of the through hole 65 opens to the bottom 641D of the groove 64D facing downward.
The mass body 6 further has a plurality of concave portions 66. The concave portions 66 are disposed at lower ends of both ends in the front-rear direction at both ends in the left-right direction of the central portion 61. Each concave portion 66 is recessed upward from the lower surface 602 of the central portion 61, and opens at the left-right direction end and the front-rear direction end.
The magnet member 7 is fixed to the mass body 6 and faces the coil 3 in the up-down direction. The magnet member 7 is disposed inside the grooves 64U and 64D as viewed in the vertical direction on the mass body 6, and is fixed to the inside of the through hole 65 by an adhesive or the like. As a result, the vibration motor 100 can be made thinner than in the case where the magnet members 7 are provided on the bottom surfaces 641U, 641D of the grooves 64U, 64D.
The magnet member 7 has magnetic poles in the left-right direction. That is, the magnet member 7 has an N pole in the left direction, an S pole in the right direction, or an S pole in the left direction and an N pole in the right direction.
The magnet member 7 is opposed to the coil 3 in the up-down direction. For example, as described above, the coil 3 has the first coil 31 and the second coil 32. The first coil 31 and the first protective member 41 are disposed above the magnet member 7. The second coil 32 and the second protection member 42 are disposed below the magnet member 7.
By disposing the coils 3 on both sides of the magnet member 7 in the up-down direction, a driving force of vibration is generated on both sides of the magnet member 7. Therefore, the vibrator 102 is less likely to shake in the up-down direction than a case where the coil 3 is used and the driving force is generated only on one side of the magnet member 7, for example, and therefore the vibrator 102 can be vibrated stably in the left-right direction.
In addition, the arrangement of the magnet member 7 can be simplified. Since it is not necessary to maximize the magnetic field strength on one side (the coil 3 side on one side) of the magnet member 7 in the vertical direction, it is not necessary to construct the magnet member 7 from a plurality of magnet pieces arranged in halbach, for example.
The connection member 8 connects the mass body 6 and the elastic member 103. In the present embodiment, the connection member 8 includes 4 connection members 81, 82, 83, 84. Further, the structure of the connection member 8 will be described later.
The slide member 9 is disposed on an end surface of the mass body 6 in a direction intersecting the left-right direction. For example, the sliding member 9 is disposed on the upper surface 601, the lower surface 602, the front surface and the rear surface (reference numerals are omitted) of the mass body 6 and the bottom surfaces 641U, 641D of the grooves 64U, 64D, respectively. In addition, the sliding member 9 may be disposed on the upper and lower surfaces of the connecting member 8. In this way, even if the vibrator 102 vibrating in the left-right direction shakes and comes into contact with the inner surface of the case 1, the protection member 4, and the like, the sliding member 9 slides smoothly on the surface thereof. In this way, rotational shake of the vibrator 102 about a direction perpendicular to the left-right direction due to increase in shake can be suppressed or prevented. Therefore, the vibrator 102 can be stably vibrated with a simple configuration. The slide member 9 is disposed on an end surface of the mass body 6 in a direction intersecting the left-right direction. Therefore, the vibrator 102 can be stably vibrated with a simple configuration.
In the present embodiment, the sliding member 9 is a film-like body, and is formed, for example, in a film-like or belt-like shape made of a fluororesin. In this way, the mass body 6 can be prevented from increasing in size in the direction intersecting the left-right direction. Therefore, the vibrator 102 can be prevented from contacting the inner surface of the case 1, and the vibration motor 100 can be prevented from being enlarged. In addition, the sliding member 9 can be easily disposed on the surface of the mass body 6. In addition, the slide member 9 is easily slid in the vibration direction (i.e., the left-right direction).
1-4 elastic part 103 >
The elastic member 103 connects the vibrator 102 and the stator 101. The elastic member 103 is capable of expanding and contracting in the left-right direction, and is disposed between both ends of the mass body 6 in the left-right direction and the inner surface of the housing 1. The elastic members 103 are disposed at both ends in the front-rear direction at the respective ends in the left-right direction of the mass body 6. The front-rear direction is a direction perpendicular to the left-right direction and the up-down direction. In the present embodiment, the elastic member 103 includes 4 elastic members 1031, 1032, 1033, 1034.
For example, in the present embodiment, 2 elastic members 1031 and 1032 are arranged between the left side surface 114 and the left end of the transducer 102. At the left end portion of the mass body 6, the right end portion of the elastic member 1031 is fixed to the front end portion of the central portion 61 via the connection member 81. The right end portion of the elastic member 1032 is fixed to the rear end portion of the central portion 61 via the connecting member 82. The left end portions of the elastic members 1031, 1032 are fixed to the inner surface of the left side surface portion 114 of the cover portion 11.
Further, 2 elastic members 1033 and 1034 are arranged between the right side surface portion 115 and the right end portion of the vibrator 102. At the right end portion of the mass body 6, the left end portion of the elastic member 1033 is fixed to the front end portion of the central portion 61 via the connecting member 83. The left end portion of the elastic member 1034 is fixed to the rear end portion of the central portion 61 via a connecting member 84. Right end portions of the elastic members 1033, 1034 are fixed to an inner surface of the right side surface portion 115 of the cover 11.
By disposing the elastic member 103 as described above, the shake of the vibrator 102 in the front-rear direction can be reduced. The vibrator 102 is not likely to rotate around a predetermined axis parallel to the left-right direction during vibration. Therefore, the vibrator 102 can vibrate stably.
However, the number of elastic members 103 is not limited to the above-described examples. The number of the elastic members 103 arranged on the left and right sides of the vibrator 102 may be one or more than 3.
The elastic member 103 is a coil spring that can expand and contract in the left-right direction. By using the coil spring, the vibration amplitude of the vibrator 102 in the left-right direction can be further increased. The coil spring extends in the left-right direction. The coil spring is hollow inside and functions as a receiving portion 1030 for receiving a projection 803 of the connecting member 8, which will be described later.
Preferably, the material of the coil spring is piano wire. That is, the elastic member 103 is constituted by a piano wire. The piano wire has higher reliability such as strength and durability than hard steel wires, stainless steel wires, and the like. Therefore, by using the piano wire, the life of the elastic member 103 can be improved. The above-described example does not exclude a configuration in which the coil spring is made of a material other than piano wire. For example, the material may be a hard steel wire, a stainless steel wire, or the like.
The present invention is not limited to the above example, and at least one of the elastic members 103 may be a member other than a coil spring. For example, a plate spring or a rubber member may be used.
In the vibration motor 100 having the above-described structure, by supplying a current to the coil 3 through the substrate 2, magnetic lines of force are generated in the coil 3, and the vibrator 102 can be driven in the left-right direction by interaction with the magnetic lines of force generated by the magnet member 7. By controlling the supply of an appropriate current to the coil 3 and the elastic force of the elastic member 103, the vibration motor 100 vibrates in the left-right direction.
< 1-5. Connecting part 8 >
Next, the connection member 8 will be described with reference to fig. 1 to 11. Fig. 11 is an exploded perspective view showing an example of a connection portion between the mass body 6 and the elastic member 103 via the connection member 8. In fig. 11, the adhesives B1 and B2 described later are not shown. The same applies to fig. 12 to 14 described later.
In the present embodiment, the connection member 8 is fixed to the mass body 6 via the first adhesive B1 (see fig. 1 and 9, for example). Specifically, the 4 connection members 81, 82, 83, 84 are fixed to the front-rear direction end portions of the central portion 61 at the left-right direction end portions thereof, respectively. By using the first adhesive B1, the connecting member 8 can be easily fixed while suppressing the size of the fixing portion from becoming large. However, the present invention is not limited to this example, and the connecting member 8 may be fixed to the mass body 6 by brazing, welding, diffusion bonding, or the like. The number of the connection members 8 is determined based on the number of the elastic members 103.
The material of the connection member 8 is different from the mass body 6, and is, for example, stainless steel. However, the material of the connection member 8 is not limited to this example, and may be other than stainless steel.
By connecting the mass body 6 and the elastic member 103 via the connecting member 8 made of a material different from that of the mass body 6, connection of both is easy. For example, a high-density material is used for the mass body 6. In the case where the portion to which the elastic member 103 is to be connected is to be formed on the vibrator 102, even if the mass body 6 is formed of a material which is difficult to process, the connecting member 8 may be formed of a material which is easier to process than the mass body 6, and the connecting member 8 may be disposed at the portion of the mass body 6. In this way, the mass body 6 and the elastic member 103 can be easily connected via the connecting member 8.
The connecting member 8 is made of a material having better machinability than the mass body 6. The machinability includes, for example, bending workability, press workability, machinability, and the like. Preferably, at least any one of the hardness and rigidity of the material of the connection member 8 is smaller than that of the mass body 6. The hardness may be evaluated by any one of, for example, brinell hardness, vickers hardness, rockwell hardness, shore hardness, knoop hardness, and mohs hardness. Rigidity can be evaluated by Young's modulus and elastic modulus, for example.
In this way, the connecting member 8 is easily formed by improving the machinability. For example, when the connecting member 8 is made of a material having lower rigidity than the mass body 6, bending, pressing, and the like of the connecting member 8 are facilitated. Therefore, the connecting member 8 can be more easily deformed into a desired shape. In addition, the connecting member 8 is made of a material having a lower hardness than the mass body 6, so that cutting and the like of the connecting member 8 are facilitated. Therefore, the protruding portion 803, the hole portion 804, and the like, which will be described later, can be more easily formed on the connecting member 8.
The connection member 8 has a stage 801, a plate 802, and a projection 803.
The stage 801 is disposed on the left-right end surface 610 of the central portion 61 of the mass body 6, and extends in the front-rear direction and the up-down direction. The positioning of the connecting member 8 in the left-right direction can be performed by disposing the stage 801 on the end face 610.
The plate portion 802 extends from the lower end portion of the mesa 801 toward the central portion 61 in the lateral direction, and expands in the front-rear direction. The plate portion 802 is disposed on a bottom surface 661 of the recess 66 of the mass body 6 facing downward. This enables the connection member 8 to be positioned in the up-down direction.
Preferably, at least one of the table portion 801 and the plate portion 802 is fixed to the end surface 620 via the first adhesive B1, while the end portion on the side body portion 62 side in the front-rear direction is in contact with the end surface 620 on the side body portion 62 in the front-rear direction. The end surface 620 includes an inner surface 662 of the recess 66 facing in the front-rear direction. In this way, the connecting member 8 can be positioned in the front-rear direction. However, this example does not exclude a configuration in which the end portions of the table portion 801 and the plate portion 802 on the side body portion 62 side in the front-rear direction are both disposed apart from the end surface 620.
Further, the lower surface of the plate 802 is preferably located above the lower surface 602 of the mass body 6 or at the same vertical position as the lower surface 602. Thus, the plate 802 does not protrude downward from the lower surface 602 of the mass body 6. Therefore, the lower surface of the plate portion 802 is not easily in contact with the upper surface of the bottom plate 12. In addition, the vibrator 102 can be prevented from becoming larger (an increase in the vertical dimension). Therefore, contact between the vibrator 102 and the inner surface of the case 1 can be effectively suppressed. However, this example does not exclude a configuration in which the lower surface of the plate portion 802 is disposed below the lower surface 602 of the mass body 6.
The protruding portion 803 is disposed on the stage 801 and protrudes toward the elastic member 103 in the left-right direction. The protruding portion 803 is accommodated in an accommodating portion 1030 (i.e., inside the coil spring) in the elastic member 103. Further, the present invention is not limited to this example, and the protruding portion 803 may be disposed on the elastic member 103 side, and the housing portion 1030 may be disposed on the table portion 801 side. For example, the end of the coil spring on the table portion 801 side may function as a protruding portion, and a recess portion recessed in the lateral direction and functioning as a receiving portion may be disposed on the table portion 801. That is, any structure may be used as long as one of the elastic member 103 and the connecting member 8 has the protruding portion 803 and the other has the receiving portion 1030 for receiving the protruding portion 803. In this way, the connection position of the elastic member 103 with respect to the connection member 8 can be easily determined.
The outer edge of the protrusion 803 is formed of an arc shape and a straight line connecting both ends of the arc shape when viewed from the left-right direction. That is, the protruding portion 803 has a cylindrical shape having a flat surface 8031 on the radially outer side surface. The flat surface 8031 is arranged at the lower end portion of the protruding portion 803, and extends in the left-right direction and the front-rear direction.
Further, it is preferable that the outer diameter of the protruding portion 803 is smaller than the diameter dimension of the receiving portion 1030 (for example, the inner diameter of the coil spring) to such an extent that the protruding portion 803 can be pressed into the receiving portion 1030. In other words, the outer side surface of the protruding portion 803 is, for example, the radially outer side surface of the protruding portion 803 with respect to the central axis of the protruding portion 803 parallel to the left-right direction, and is in contact with the inner side surface of the receiving portion 1030. In the present embodiment, the inner surface of the housing 1030 is the inner surface of the coil spring as the elastic member 103. In this way, by engaging the protruding portion 803 with the receiving portion 1030, the connection strength between the connection member 8 and the elastic member 103 can be improved. However, this example does not exclude a configuration in which the outer surface of the protruding portion 803 does not contact the inner surface of the receiving portion 1030.
Then, the connecting member 8 preferably further has a hole 804. The hole 804 is recessed from the end surface of the mesa 801 on the elastic member 103 side in the lateral direction toward the opposite side thereof. In addition, a second adhesive B2 (for example, see fig. 9) is disposed in the hole 804. In the fixed portion of the elastic member 103 and the connection member 8, at least a portion of the hole 804 is opened toward the elastic member 103. For example, in the present embodiment, the hole 804 overlaps with the end of the coil spring on the table 801 side when viewed from the left-right direction. In this way, the second adhesive B2 can be brought into contact with the elastic member 103 from the opening of the hole 804. This allows the elastic member 103 to be bonded to the connecting member 8. When the elastic member 103 is connected to the connecting member 8, the hole 804 is arranged vertically above the protrusion 803. That is, for example, in fig. 9, Z2 is vertically upward, and Z1 is vertically downward. By disposing the second adhesive B2 in the hole 804, the second adhesive B2 flows downward (Z1 direction) from the hole 804 toward the protrusion 803. Therefore, the second adhesive B2 can be made to penetrate between the elastic member 103 and the connecting member 8. This can further expand the bonding area between the elastic member 103 and the connecting member 8, and thus can improve the bonding strength between the two.
The hole 804 is disposed near the plane 8031 of the protruding portion 803 when viewed from the left-right direction. Thus, a part of the hole 804 overlaps a part of the accommodation portion 1030 of the elastic member 103 when viewed from the left-right direction. In other words, a part of the hole 804 opens to the receiving portion 1030. In this way, the second adhesive B2 can be disposed between at least the flat surface 8031 of the radially outer side surfaces of the protruding portion 803 and the inner side surface of the receiving portion 1030 of the elastic member 103. Therefore, the flat surface 8031 can be bonded to the inner surface of the housing 1030. The second adhesive B2 is then impregnated between the area of the radially outer surface of the protruding portion 803 and the inner surface of the receiving portion 1030, so that the two can be bonded together. Therefore, the elastic member 103 can be more firmly connected to the connecting member 8.
Preferably, the hole 804 is a through hole. In this way, the hole 804 can be easily formed in the connecting member 8. The elastic member 103 can be bonded to both the connection member 8 and the central portion 61 via the second adhesive B2. For example, by disposing the same adhesive on the surface of the connecting member 8 facing the central portion 61 and the hole 804, the same adhesive can be used to bond between the central portion 61 and the connecting member 8 and between the connecting member 8 and the elastic member 103. That is, the first adhesive B1 may be the same member as the second adhesive B2. Therefore, the connection of the elastic member 103 to the mass body 6 via the connection member 8 can be performed more easily. However, this example does not exclude a configuration in which the first adhesive B1 is different from the second adhesive B2 even if the hole 804 is a through hole.
The hole 804 extends downward in the mesa 801 and extends from the end of the plate 802 on the side of the elastic member 103 in the lateral direction toward the center 61. That is, a part of the hole 804 is disposed on the stage 801. The remaining portion of the hole 804 is disposed on the plate 802.
However, the above illustration does not exclude the structure in which the plane 8031 is omitted. The protrusion 803 may have a cylindrical shape. The above example does not exclude a configuration in which the protruding portion 803 is not cylindrical. The protruding portion 803 may have any columnar shape, and may have an n-prism shape (n is an integer of 3 or more), for example. The above-described example does not exclude a structure in which the hole 804 is not a through hole and a structure in which a part of the hole 804 is not disposed on the plate 802. The present embodiment is not limited to the example, and the plate 802 may be omitted. The above-described example does not exclude a configuration in which the connecting member 8 does not have the hole 804. That is, the hole 804 may be omitted.
As described above, the connecting member 8 is fixed to the mass body 6 via the first adhesive B1. However, this example does not exclude a structure in which the connecting member 8 is fixed to the mass body 6 by a method other than the first adhesive B1. For example, the connection member 8 may be fixed by any one of soldering, welding, diffusion bonding, and the like using silver solder or the like.
As described above, the elastic member 103 is connected to the connecting member 8 via the second adhesive B2. However, this example does not exclude a configuration in which the elastic member 103 is connected to the connecting member 8 by a method other than the second adhesive B2. For example, the elastic member 103 may be connected by any one of soldering, welding, diffusion bonding, and the like using silver solder or the like.
< 1-6. Modification of connecting Member 8 >
Next, first to third modifications of the connecting member 8 will be described. The above-described embodiments and the first to third modifications described below may be arbitrarily combined unless otherwise contradictory.
< 1-6-1. First modification of connecting member 8 >
Fig. 12 is an exploded perspective view showing a first modification of the connecting member 8. In the first modification, the connection member 8 further includes a plate portion 802a. The plate portion 802a extends from the upper end portion of the stage portion 801 toward the central portion 61 in the lateral direction, and is disposed on the upper surface of the central portion 61. In this way, the connecting member 8 can be more stably attached to the mass body 6 because the plate portions 802, 802a can be disposed with the central portion 61 interposed therebetween.
Further, the mass body 6 preferably has a plurality of concave portions 66a arranged on the upper surface of the central portion 61. The concave portions 66a are disposed at upper end portions of both ends in the front-rear direction at both ends in the left-right direction of the central portion 61. Each concave portion 66a is recessed downward from the upper surface 601 of the central portion 61, and opens at the left-right direction end and the front-rear direction end. The plate portion 802a is disposed on the upward facing bottom surface of the recess 66a. However, this illustration does not exclude a structure in which the connecting member 8 does not have the plate portion 802 and a structure in which the mass body 6 does not have the concave portion 66a.
Preferably, at least one of the front-rear direction end portion of the side body portion 62 side of at least one of the table portion 801, the plate portion 802, and the plate portion 802a is in contact with the front-rear direction end surface 620 of the side body portion 62 or fixed to the end surface 620 via the first adhesive B1. In this way, the connecting member 8 can be positioned in the front-rear direction. However, this example does not exclude a configuration in which the table portion 801, the plate portion 802, and the plate portion 802a are disposed so that the end portions on the side of the side body portion 62 in the front-rear direction are separated from the end surface 620.
Further, the upper surface of the plate 802a is preferably located below the upper surface 601 of the mass body 6 or at the same vertical position as the upper surface 601. Thus, the plate 802a does not protrude upward from the upper surface 601 of the mass body 6. Therefore, the upper surface of the plate portion 802a is not easily in contact with the lower surface of the top surface portion 111 of the cover portion 11. In addition, the vibrator 102 can be prevented from becoming larger (an increase in the vertical dimension). Therefore, contact between the vibrator 102 and the inner surface of the case 1 can be effectively suppressed. However, this example does not exclude a configuration in which the upper surface of the plate portion 802a is disposed above the upper surface 601 of the mass body 6.
< 1-6-2. Second modification of connecting member 8 >
Fig. 13 is an exploded perspective view showing a second modification of the connecting member 8. In the second modification, the connection member 8 further has a groove 805. The groove 805 is arranged around the protrusion 803, and extends along the outer periphery of the protrusion 803. Specifically, the groove 805 is disposed on the mesa 801 and extends along the outer periphery of the root of the protrusion 803. As shown in fig. 13, the groove 805 may be formed in an annular shape integrally. However, this example does not exclude a configuration in which the groove 805 has a single or a plurality of circular arc shapes.
A third adhesive B3 is disposed in the groove 805. In the fixed portion of the elastic member 103 and the connection member 8, the groove 805 opens toward the elastic member 103. In this way, the second adhesive B3 can be brought into contact with the elastic member 103 from the opening of the groove 805. Thus, the third adhesive B3 can firmly and reliably adhere the elastic member 103 to the connecting member 8.
Preferably, the groove 805 is connected to the hole 804. In this way, the second adhesive B2 can be disposed as the third adhesive B3 in the groove 805. However, this example does not exclude a configuration in which the groove 805 is not connected to the hole 804 and a configuration in which the second adhesive B2 is different from the third adhesive B3.
Further, it is preferable that a part of the elastic member 103 is fitted into the groove 805. For example, an end portion of the elastic member 103 (for example, coil spring) on the connection member 8 side is disposed in the groove 805. By embedding a part of the elastic member 103 in the groove 805 in which the third adhesive B3 is disposed, the elastic member 103 can be more firmly fixed to the connecting member 8. However, this illustration does not exclude a configuration in which a part of the elastic member 103 is not fitted into the groove 805.
< 1-6-3. Third modification of connecting Member 8 >
Fig. 14 is an exploded perspective view showing a third modification of the connecting member 8. In the third modification, the connecting member 8 has a cylindrical portion 806 instead of the protruding portion 803 (see fig. 9 to 11, etc.). The cylindrical portion 806 protrudes in the left-right direction, and accommodates the end portion of the coil spring (the elastic member 103) in the left-right direction. The tubular portion 806 is disposed on the table portion 801 and protrudes toward the elastic member 103 in the left-right direction. By accommodating the end portions of the coil spring in the left-right direction in the tube portion 806, the coil spring can be easily positioned with respect to the connection member 8. In addition, the coil spring can be prevented from expanding and contracting in a direction perpendicular to the left-right direction. Further, by disposing an adhesive in the tube portion 806, the coil spring can be more firmly connected to the connecting member 8.
< 2. Electronic device 200 >)
The vibration motor 100 according to the above embodiment can be mounted on, for example, an electronic device 200 schematically shown in fig. 8. That is, the electronic apparatus 200 has the vibration motor 100. The electronic apparatus 200 is an apparatus that applies tactile stimulus to a person who operates the electronic apparatus 200 by vibration of the vibration motor 100. The electronic device 200 shown in fig. 8 is a smart phone as an example, but a tablet computer, a game device, a wearable terminal, and the like may be employed in addition to this.
In the case of the electronic apparatus 200 shown in fig. 8, various notifications such as an incoming call can be made to the operator or tactile feedback can be provided to the operator by outputting vibrations by the vibration motor 100. As the tactile feedback, for example, when the concave portion 201 shown in fig. 8 is pressed, the vibration motor 100 outputs vibration, whereby the operator can obtain a feeling like pressing a button. In particular, by using the vibration motor 100 according to the above embodiment, the coil 3 can be protected, and the problem of vibration of the electronic device 200 caused by the problem of the coil 3 can be suppressed.
< 3 other >
The embodiments of the present invention have been described above. The scope of the present invention is not limited to the above embodiment. The present invention can be implemented by applying various modifications to the above-described embodiments within a range not departing from the gist of the invention. The matters described in the above embodiments can be appropriately combined in any range where no contradiction occurs.
< 4. Summary >
The embodiments described above are generally described below.
For example, the vibration motor disclosed in the present specification adopts the following structure (first structure):
the vibration motor has:
a stator;
a vibrator capable of vibrating at least in a first direction; and
an elastic member connecting the vibrator and the stator,
the stator has a coil opposed to the vibrator in a second direction perpendicular to the first direction,
the vibrator has:
a mass extending along the first direction;
a magnet member fixed to the mass body and facing the coil in the second direction; and
a connecting member connecting the mass body and the elastic member,
the material of the connecting part is different from the material of the mass body.
In addition, the following structure (second structure) may be adopted: in the vibration motor of the first structure, at least any one of the hardness and the rigidity of the material of the connecting member is smaller than the mass body.
In addition, the following structure (third structure) may be adopted: in the vibration motor of the first or second configuration, the connecting member is fixed to the mass body via a first adhesive.
In addition, the following structure (fourth structure) may be adopted: in the vibration motor according to any one of the first to third configurations, one of the elastic member and the connecting member has a protruding portion, and the other has a receiving portion for receiving the protruding portion.
In addition, the following structure (fifth structure) may be adopted: in the vibration motor of the fourth configuration, the connection member has the protruding portion and a hole portion in which the second adhesive is disposed, and at least a part of the hole portion is opened toward the elastic member in the fixed portion of the elastic member and the connection member.
In addition, the following structure (sixth structure) may be adopted: in the vibration motor of the fifth configuration, the hole portion is a through hole.
In addition, the following structure (seventh structure) may be adopted: in the vibration motor of the fifth or sixth configuration, the connection member further has a groove portion disposed around the protruding portion and extending along an outer periphery of the protruding portion, the third adhesive is disposed in the groove portion, and the groove portion is opened toward the elastic member in the elastic member and the fixed portion of the connection member.
In addition, the following structure (eighth structure) may be adopted: in the vibration motor of the seventh configuration, the groove portion is connected to the hole portion.
In addition, the following structure (ninth structure) may be adopted: in the vibration motor according to the seventh or eighth aspect, a part of the elastic member is fitted into the groove.
In addition, the following structure (tenth structure) may be adopted: in the vibration motor of any one of the first to ninth structures, the elastic member is a coil spring that is stretchable in the first direction.
In addition, the following structure (eleventh structure) may be adopted: in the vibration motor according to any one of the first to third configurations, the elastic member is a coil spring that is stretchable in the first direction, and the connecting member has a cylindrical portion protruding in the first direction, the cylindrical portion accommodating an end portion of the coil spring in the first direction.
Industrial applicability
The present invention is useful, for example, in vibration motors mounted on various devices.

Claims (16)

1. A vibration motor, comprising:
a stator; and
a vibrator capable of vibrating in a first direction,
the stator has:
a coil facing the vibrator in a second direction perpendicular to the first direction; and
a case accommodating the coil and the vibrator,
The vibrator has:
a mass extending along the first direction;
a magnet member fixed to the mass body and facing the coil in the second direction; and
and a sliding member disposed on an end surface of the mass body in a direction intersecting the first direction, the sliding member sliding on an inner surface of the case when the sliding member contacts the inner surface of the case when the vibrator vibrates.
2. The vibration motor according to claim 1, wherein,
the sliding member is disposed on an end face of the mass body facing in the second direction and an end face of the mass body facing in a third direction perpendicular to the first direction and the second direction.
3. The vibration motor according to claim 2, wherein,
the sliding members are disposed on both end surfaces of the mass body in the second direction and both end surfaces of the mass body in the third direction.
4. A vibration motor according to any one of claims 1 to 3, wherein,
the sliding members are disposed at least at both end portions in the first direction on end surfaces of the mass body in a direction intersecting the first direction.
5. A vibration motor according to any one of claims 1 to 3, wherein,
The width of the mass body in the second direction is narrower than the width of the mass body in a third direction perpendicular to the first direction and the second direction,
the sliding members are disposed at least at both ends in the third direction on an end face of the mass body facing the second direction.
6. A vibration motor according to any one of claims 1 to 3, wherein,
the sliding member is a film-like body.
7. The vibration motor of claim 6, wherein,
the end portion of the sliding member in the first direction has a chamfer portion with a corner portion chamfered when viewed from a normal direction of the sliding member.
8. A vibration motor according to any one of claims 1 to 3, wherein,
the material of the sliding member is a fluororesin.
9. A vibration motor according to any one of claims 1 to 3, wherein,
the stator further has a protective member covering at least an end portion of the coil in the first direction,
an end portion of the protective member on the vibrator side in the second direction is disposed on the vibrator side in the second direction with respect to the coil.
10. A vibration motor according to any one of claims 1 to 3, wherein,
The coil has:
a first coil disposed at a position closer to the second direction than the magnet member; and
and a second coil disposed at a position closer to the other side in the second direction than the magnet member.
11. A vibration motor according to any one of claims 1 to 3, wherein,
the vibration motor further has an elastic member connecting the vibrator and the stator,
the elastic member is disposed between both ends of the mass body in the first direction and an inner surface of the housing,
the elastic members are disposed at both ends of the mass body in a third direction perpendicular to the first direction and the second direction, respectively, at the respective ends of the mass body in the first direction.
12. A vibration motor according to any one of claims 1 to 3, wherein,
the vibration motor further has an elastic member connecting the vibrator and the stator,
the elastic member is a coil spring that is stretchable in the first direction.
13. The vibration motor of claim 12, wherein,
the material of the coil spring is piano wire.
14. A vibration motor according to any one of claims 1 to 3, wherein,
The mass body has:
a through hole having a polygonal shape when viewed from the second direction, the through hole accommodating the magnet member; and
and a plurality of corner recesses recessed from each corner of the through hole in a direction perpendicular to the second direction.
15. A vibration motor according to any one of claims 1 to 3, wherein,
the mass body further has a protruding portion protruding in the third direction at a first direction center portion of at least one side end portion of the third direction perpendicular to the first direction and the second direction and opposing the housing in the third direction.
16. A vibration motor according to any one of claims 1 to 3, wherein,
the vibrator further includes a buffer member disposed at least one of both end portions of the mass body in the first direction.
CN202311117604.XA 2022-08-31 2023-08-31 Vibration motor Pending CN117639424A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2022-138597 2022-08-31
JP2022-138601 2022-08-31
JP2023026364A JP2024035032A (en) 2022-08-31 2023-02-22 vibration motor
JP2023-026364 2023-02-22

Publications (1)

Publication Number Publication Date
CN117639424A true CN117639424A (en) 2024-03-01

Family

ID=90031001

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311117604.XA Pending CN117639424A (en) 2022-08-31 2023-08-31 Vibration motor

Country Status (1)

Country Link
CN (1) CN117639424A (en)

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