CN215344113U - Driver - Google Patents

Abstract

The present disclosure relates to a driver comprising: a fixed part; the moving part can move along a preset direction relative to the fixed part; the sliding shaft extends along the preset direction and is arranged between the fixed part and the moving part so as to support the moving part to move along the preset direction; a coil provided to the moving part; the magnet is arranged on the fixing part so as to drive the coil to move along a preset direction when the coil is electrified, and the magnetic pole distribution direction of the magnet is vertical to the preset direction; the first magnetic pieces are arranged on two sides of the magnet along the distribution direction of the magnetic poles, the coil surrounds one first magnetic piece, and the annular surface of the coil is vertical to the preset direction; and second magnetic members provided on both sides of the magnet in a predetermined direction. The fixed part and the moving part are supported by the sliding shaft, so that stable rigid support is provided, and abrasion of the driver caused by pits due to concentrated pressure on the driver is avoided. The coil arranged in the closed magnetic circuit can be subjected to larger driving force, and the requirement of large stroke of an optical device is met.

Description

Driver

Technical Field

The present disclosure relates to the field of optical technology, and in particular, to a driver.

Background

The optical system is a system for imaging or optical information processing, and can be applied to various fields, such as a camera of a mobile phone, a camera or a lens of a projection technology, and as the application of the optical system is more extensive, a user more seeks an imaging high-definition optical system. In the related art, a voice coil type motor is mostly adopted in a conventional optical device, and the optical device is moved by utilizing the principle that an electrified coil receives ampere force in a magnetic field. However, when the stroke of the optical device is large, the magnet has an edge effect, and the electromagnetic force at the two ends is insufficient. In addition, factors such as instability in the movement process of the optical device, overlarge movement acceleration caused by ampere force and the like can cause poor optical anti-shake effect, and the imaging effect is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the present disclosure is to provide a driver to at least partially solve the problems in the related art.

In order to achieve the above object, the present disclosure provides a driver including:

a fixed part;

the moving part can move along a preset direction relative to the fixed part;

the sliding shaft extends along the preset direction and is arranged between the fixed part and the moving part so as to support the moving part to move along the preset direction;

a coil provided to the moving part;

the magnet is arranged on the fixing part and used for driving the coil to move along the preset direction when the coil is electrified, and the magnetic pole distribution direction of the magnet is perpendicular to the preset direction;

the first magnetic pieces are arranged on two sides of the magnet in the magnetic pole distribution direction, the coil surrounds one first magnetic piece, and the annular surface of the coil is perpendicular to the preset direction; and

and the second magnetic parts are arranged on two sides of the magnet along the preset direction.

Optionally, the preset direction includes an x direction and a y direction, and the sliding shaft includes a first sliding shaft extending along the x direction and a second sliding shaft extending along the y direction.

Optionally, the first sliding shaft and the second sliding shaft are arranged in contact in a z direction perpendicular to the x direction and the y direction.

Optionally, the number of the first sliding shaft and the second sliding shaft is at least three respectively.

Optionally, the number of the coils and the number of the magnets are respectively multiple, and the multiple coils and the multiple magnets are arranged so that the moving part can rotate in a plane where the x direction and the y direction are located.

Optionally, the driver further includes a focusing module movably disposed on the fixing portion.

Optionally, the number of the magnets is two, two of the magnets are arranged at intervals along the magnetic pole distribution direction, the first magnetic part is arranged on both sides of the two of the magnets along the magnetic pole distribution direction, and the coil surrounds the first magnetic part between the two of the magnets.

Optionally, the magnetic poles of the two magnets are distributed in opposite directions, and are both located inside the coil or both located outside the coil.

Optionally, two sides of the two magnets in the preset direction are provided with second magnetic parts, and the first magnetic parts and the second magnetic parts form a shape like a Chinese character 'ri'.

Optionally, a magnetic attraction piece is arranged at a position of the moving portion corresponding to the magnet, and the magnetic attraction piece is configured to enable the sliding shaft to be abutted between the fixed portion and the moving portion through a magnetic attraction force between the magnetic attraction piece and the magnet, and to provide a tendency of resetting to the initial position for the moving portion when the moving portion deviates from the initial position relative to the fixed portion.

Through above-mentioned technical scheme, support through the slide shaft between the fixed part of driver and the motion part, provide stable rigid support, avoid again to the driver produce concentrated pressure and cause the wearing and tearing of pit lead to the driver. In addition, magnetic parts are arranged on four sides of the magnet, the coil surrounds the first magnetic part located on one magnetic pole side of the magnet, one side of the coil is arranged in an area surrounded by the magnetic parts on the periphery, on the basis that the magnetic parts restrain magnetic lines of force of the magnet, the magnetic circuit of the magnet is closed, the coil arranged in the closed magnetic circuit can be subjected to large driving force, and the fixed part and the moving part are driven to move relatively along the preset direction. The driver in the embodiment of the disclosure can generate a larger driving force, and meet the large stroke requirement of the optical device or the driving requirement of the optical device with larger weight.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic structural diagram of a driver provided in an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a coil and magnet arrangement provided in an exemplary embodiment of the present disclosure;

FIG. 3 is a magnetic flux distribution plot for the embodiment of FIG. 2;

FIG. 4 is a schematic view of a coil and magnet arrangement provided in another exemplary embodiment of the present disclosure;

FIG. 5 is a magnetic flux distribution plot for the embodiment of FIG. 4;

FIG. 6 is a schematic view of a coil and magnet arrangement provided in another exemplary embodiment of the present disclosure;

FIG. 7 is a magnetic flux distribution plot for the embodiment of FIG. 6;

FIG. 8 is a schematic view of a coil and magnet arrangement provided in another exemplary embodiment of the present disclosure;

FIG. 9 is a magnetic flux distribution plot for the embodiment of FIG. 8;

fig. 10 is an assembly view of a driver provided in an exemplary embodiment of the present disclosure.

Description of the reference numerals

10-fixed part, 20-moving part, 21-mounting block, 22-mounting groove, 30-magnet, 40-coil, 50-sliding shaft, 51-first sliding shaft, 52-second sliding shaft, 61-first magnetic part, 62-second magnetic part, 70-focusing module, 80-magnetic part.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, the use of directional terms such as "inner and outer" is intended with respect to the proper contours of the respective parts, unless otherwise specified. In addition, the terms "first, second, and the like" used in the embodiments of the present disclosure are for distinguishing one element from another, and have no order or importance. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.

Referring to fig. 1 and 10, the present disclosure provides a driver including a fixed part 10, a moving part 20 capable of moving in a preset direction with respect to the fixed part 10, and a slide shaft 50, the slide shaft 50 being extended in the preset direction between the fixed part 10 and the moving part 20 to support the moving part 20 to move in the preset direction. When the driver is used in the optical field, optical devices may be respectively disposed on the fixed portion 10 and the moving portion 20, for example, a mirror may be disposed on the fixed portion 10, and an image sensor may be disposed on the moving portion 20, which may be adjusted according to requirements in practical applications, and the embodiment of the present disclosure is not limited thereto. When the moving portion 20 and the fixed portion 10 move relatively, it is converted into a contact sliding between the sliding shaft 50 and the fixed portion 10 or between the sliding shaft 50 and the moving portion 20, for example, when the sliding shaft 50 is mounted on the moving portion 20, the sliding shaft 50 and the fixed portion 10 contact and slide, when the sliding shaft 50 is mounted on the fixed portion 10, the sliding shaft 50 and the moving portion 20 contact and slide, and when the sliding shaft 50 is mounted on the fixed portion 10 and the moving portion 20, respectively, as described below, a sliding occurs between the two contacting sliding shafts 50. The slide shaft 50 may be mounted in the mounting groove 22, such as by adhesive. The sliding support of the sliding shaft 50 can avoid damage to the position where the sliding shaft is installed, such as a pit, and can also provide rigid support for the moving part 20, thereby ensuring the stability of the moving process.

In the embodiment of the present disclosure, the driver may further include a coil 40 disposed on the moving portion 20 and a magnet 30 disposed on the fixing portion 10, and when the coil 40 is powered on, an ampere force may be generated in a magnetic field of the magnet 30 to drive the coil 40 to move along a predetermined direction, and a magnetic pole distribution direction of the magnet 30 is perpendicular to the predetermined direction. The preset direction may include, but is not limited to, the x direction and the y direction shown in fig. 1, and may also be other directions within the plane of the x direction and the y direction.

Further, first magnetic members 61 are provided on both sides of the magnet 30 in the magnetic pole distribution direction, and second magnetic members 62 are provided on both sides of the magnet 30 in the predetermined direction. The coil 40 surrounds a first magnetic member 61, and the annular surface of the coil 40 is perpendicular to the predetermined direction, when the predetermined direction is the x direction, the annular surface of the coil 40 is perpendicular to the x direction, and when the predetermined direction is the y direction, the annular surface of the coil 40 is perpendicular to the y direction. Referring to fig. 2 to 9, the magnetic poles of the magnet 30 may be arranged in a vertical direction in the drawing, such as in a vertical direction, e.g., in a horizontal direction, e.g., in a vertical direction, e.g., in a horizontal direction, or in a vertical direction, e.g., in a vertical direction, in the drawing. In practical applications, such magnets 30 and coils 40 may be provided on adjacent sides of the driver to achieve movement in two directions for better anti-shake effect. Both ends of the coil 40 may be mounted to the moving part 20 through the mounting blocks 21.

Through the technical scheme, the fixed part 10 and the moving part 20 of the driver are supported through the sliding shaft 50, stable rigid support is provided, and abrasion of the driver caused by pits due to concentrated pressure on the driver is avoided. In addition, magnetic members are further disposed on four sides of the magnet 30, the coil 40 surrounds the first magnetic member 61 located on one magnetic pole side of the magnet 30, one side of the coil 40 is disposed in an area surrounded by the magnetic members on the periphery, and on the basis that the magnetic force lines of the magnet 30 are restrained by the magnetic members, the magnetic circuit of the magnet 30 is closed, so that the coil 40 disposed in the closed magnetic circuit can receive a large driving force, and the fixed portion 10 and the moving portion 20 are driven to move relatively in a preset direction. The driver in the embodiment of the disclosure can generate a larger driving force, and meet the large stroke requirement of the optical device or the driving requirement of the optical device with larger weight.

When the preset direction includes the x-direction and the y-direction as described above, referring to fig. 1, the slide shaft 50 may include a first slide shaft 51 provided to extend in the x-direction and a second slide shaft 52 provided to extend in the y-direction. In this way, the length direction of the slide shaft 50 can satisfy the moving stroke requirement of the moving part 20 no matter in which direction the moving part 20 moves. The first slide shaft 51 and the second slide shaft 52 may be disposed on the fixed part 10 or the moving part 20 at the same height, and the first slide shaft 51 plays a main supporting role when moving in the x direction and the second slide shaft 52 plays a main supporting role when moving in the y direction.

In one embodiment, referring to fig. 1, the first slide shaft 51 and the second slide shaft 52 may be disposed in contact in a z direction perpendicular to the x direction and the y direction, that is, the first slide shaft 51 and the second slide shaft 52 may be disposed to intersect, and in particular, may be disposed to intersect perpendicularly. The upper sliding shaft 50 may be installed on the fixed portion 10, and the lower sliding shaft 50 may be installed on the moving portion 20, so that when the moving portion 20 moves, sliding may occur between the two sliding shafts 50 in the up-down direction, and abrasion caused by direct contact between the fixed portion 10 and the moving portion 20 is avoided.

The number of the first slide shaft 51 and the second slide shaft 52 may be at least three. As shown in fig. 1, the number of the first slide shafts 51 and the second slide shafts 52 is three, respectively, and one first slide shaft 51 and two second slide shafts 52 may be mounted on the fixed portion 10, and correspondingly, two first slide shafts 51 and one second slide shaft 52 are mounted on the moving portion 20. This arrangement ensures more stable support of the moving part 20.

In the embodiment of the present disclosure, the number of the coils 40 and the number of the magnets 30 may be plural, and the plural coils 40 and the plural magnets 30 are provided so that the moving portion 20 can rotate in the plane in which the x direction and the y direction are located. Referring to fig. 1, the coils 40 and the magnets 30 may be disposed on four sides of the driver, and the coils 40 and the magnets 30 on opposite sides may be arranged in a staggered manner, so that the moving portion 20 may be controlled to translate or rotate in a predetermined direction by controlling the magnitude and direction of the current of each set of coils 40. When the moving part 20 is capable of rotating, by providing the above-described two-directional first slide shaft 51 and second slide shaft 52, it is also possible to provide appropriate support for the rotation of the moving part 20. When the two slide shafts 50 are disposed in contact with each other in the z direction, the rotation process of the moving part 20 can be supported by the rotation between the two slide shafts 50.

Referring to fig. 1, a magnetic member 80 may be disposed at a position of the moving portion 20 corresponding to the magnet 30, and the magnetic member 80 may be configured to enable the sliding shaft 50 to be pressed between the fixing portion 10 and the moving portion 20 by a magnetic attraction force between the magnetic member and the magnet 30. Specifically, the magnetic member 80 may be disposed along the z-direction with the magnet 30, and the fixed portion 10 and the moving portion 20 are moved close to each other along the z-direction by the magnetic attraction, so as to press the sliding shaft 50 therebetween, thereby ensuring the stability of the sliding shaft 50. Further, the magnetic attraction force between the magnetic attraction member 80 and the magnet 30 can also provide the moving part 20 with a tendency to return to the initial position when the moving part 20 deviates from the initial position with respect to the fixed part 10. For example, when the moving portion 20 moves along the x axis or the y axis, the magnetic attraction force can prevent the moving portion 20 from deflecting during the movement, and can drive the moving portion 20 to reset by the magnetic attraction effect after the moving portion 20 completes the movement; when the moving part 20 rotates in the plane xy, the magnetic attraction may also bring the moving part 20 back to the initial position after the moving part 20 finishes moving.

As shown in fig. 1, the actuator in the embodiment of the present disclosure may further include a focusing module 70 movably disposed on the fixing portion 10, and the focusing module 70 may move along the z direction. By providing the focusing module 70, the functions of the driver can be more integrated, and a high-definition imaging effect can be ensured.

According to an embodiment of the present disclosure, referring to fig. 2 to 5, the number of the magnets 30 may be one, the cross section surrounded by the first magnetic member 61 and the second magnetic member 62 may be configured in a square shape, the coil 40 is wound on the first magnetic member 61 on the upper side or the lower side of the magnet 30, and fig. 3 and 5 show the magnetic line distribution corresponding to the embodiment of fig. 2 and 4, respectively.

In another embodiment, the number of the magnets 30 may be two, and referring to fig. 6 to 9, the two magnets 30 are arranged at intervals along the magnetic pole distribution direction (i.e., the vertical direction of the drawing), the first magnetic members 61 are arranged on both sides of the two magnets 30 along the magnetic pole distribution direction, and the coil 40 surrounds the first magnetic member 61 located between the two magnets 30. This arrangement makes it possible to make one coil 40 cooperate with two magnets 30, thereby increasing the driving force of the entire driver.

Specifically, the magnetic poles of the two magnets 30 are distributed in opposite directions, i.e., the magnetic poles of one magnet 30 are distributed in an up-N-down-S manner, and the magnetic poles of the other magnet 30 are distributed in an up-S-down-N manner, so that the directions of the forces exerted on the coil 40 between the two magnets 30 are consistent according to the left-hand rule, and are all left or right. As shown in fig. 8, the two magnets 30 may be both located inside the coil 40, i.e., the coil 40 may surround the first magnetic member 61 in the middle and the two magnets 30, and fig. 9 shows the magnetic flux distribution pattern of the arrangement of fig. 8; alternatively, in other embodiments, referring to fig. 6, both the magnets 30 may be located outside the coil 40, i.e., the magnets 30 may be respectively disposed on the first magnetic members 61 on both sides opposite to the middle first magnetic member 61, the coil 40 surrounds only the middle first magnetic member 61, and fig. 7 shows the magnetic flux distribution pattern of this arrangement of fig. 6. As can be seen from fig. 6 to 9, the magnet 30 disposed inside the coil 40 increases the size of the coil 40, but the distribution of the magnetic force lines is more restricted, and in practical applications, an appropriate arrangement may be selected according to the requirement.

When two magnets 30 are provided, referring to fig. 6 to 9, the second magnetic members 62 are provided on both sides of the two magnets 30 in the first direction, respectively, and the first magnetic member 61 and the second magnetic member 62 may be formed in a shape of a Chinese character 'ri'. The zigzag structure may be formed by superimposing two rectangular structures, or may be formed by adding a magnetic member between the rectangular structures, in other words, the thickness of the first magnetic member 61 between the two magnets 30 may be twice or the same as the thickness of the magnetic member on the other side of the magnets 30.

In one embodiment, the first magnetic member 61 and the second magnetic member 62 may be integrally formed to provide a strong integrity of the magnetic members. In other embodiments, the magnetic member may be a separate combination type structure, for example, a combination of two square magnetic members, or a combination of one or several sides of a rectangular magnetic member, and the combination may be an adhesive method.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (10)

1. A driver, comprising:

a fixed part (10);

a moving part (20) capable of moving in a predetermined direction relative to the fixed part (10);

a sliding shaft (50) extending along the preset direction and arranged between the fixed part (10) and the moving part (20) to support the moving part (20) to move along the preset direction;

a coil (40) provided to the moving section (20);

the magnet (30) is arranged on the fixing part (10) and used for driving the coil (40) to move along the preset direction when the coil (40) is electrified, and the magnetic pole distribution direction of the magnet (30) is perpendicular to the preset direction;

the first magnetic pieces (61) are arranged on two sides of the magnet (30) in the magnetic pole distribution direction, the coil (40) surrounds one first magnetic piece (61), and the annular surface of the coil (40) is perpendicular to the preset direction; and

and second magnetic members (62) provided on both sides of the magnet (30) in the predetermined direction.

2. The drive according to claim 1, characterized in that the predetermined directions comprise an x-direction and a y-direction, and the slide shaft (50) comprises a first slide shaft (51) arranged extending in the x-direction and a second slide shaft (52) arranged in the y-direction.

3. An actuator according to claim 2, wherein the first slide shaft (51) and the second slide shaft (52) are arranged in contact in a z-direction perpendicular to the x-direction and the y-direction.

4. A drive as claimed in claim 3, characterized in that the number of the first and second sliding shafts (51, 52) is at least three each.

5. The driver according to any one of claims 2 to 4, wherein the number of the coils (40) and the number of the magnets (30) are plural, respectively, and the plural coils (40) and the plural magnets (30) are arranged so that the moving portion (20) can rotate in a plane in which an x direction and a y direction are located.

6. The drive according to claim 1, characterized in that it further comprises a focusing module (70) movably arranged at the fixed part (10).

7. The driver according to claim 1, wherein the number of the magnets (30) is two, two of the magnets (30) are arranged at intervals in a magnetic pole distribution direction, and the first magnetic member (61) is arranged on both sides of the two magnets (30) in the magnetic pole distribution direction, and the coil (40) is wound around the first magnetic member (61) between the two magnets (30).

8. Driver according to claim 1, wherein the two magnets (30) have magnetic poles distributed in opposite directions and are located either both inside the coil (40) or both outside the coil (40).

9. The driver according to claim 7 or 8, wherein both sides of the two magnets (30) in a predetermined direction are provided with second magnetic members (62), and the first magnetic member (61) and the second magnetic member (62) form a zigzag shape.

10. The driver according to claim 1, characterized in that a magnetic attraction member (80) is disposed at a position of the moving portion (20) corresponding to the magnet (30), and the magnetic attraction member (80) is configured to enable the sliding shaft (50) to be pressed between the fixed portion (10) and the moving portion (20) by a magnetic attraction force between the magnetic attraction member and the magnet (30), and to provide a tendency of the moving portion (20) to return to an initial position when the moving portion (20) deviates from the initial position relative to the fixed portion (10).

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