CN113035477A - Variable resistance device - Google Patents
Variable resistance device Download PDFInfo
- Publication number
- CN113035477A CN113035477A CN202011547082.3A CN202011547082A CN113035477A CN 113035477 A CN113035477 A CN 113035477A CN 202011547082 A CN202011547082 A CN 202011547082A CN 113035477 A CN113035477 A CN 113035477A
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- Prior art keywords
- gear
- shaft
- force
- suppression
- adhesive
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- 230000008878 coupling Effects 0.000 claims abstract description 69
- 238000010168 coupling process Methods 0.000 claims abstract description 69
- 238000005859 coupling reaction Methods 0.000 claims abstract description 69
- 230000000452 restraining effect Effects 0.000 claims abstract description 17
- 239000000853 adhesive Substances 0.000 claims description 53
- 230000001070 adhesive effect Effects 0.000 claims description 53
- 230000001629 suppression Effects 0.000 claims description 52
- 230000037431 insertion Effects 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 7
- 230000002401 inhibitory effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000035807 sensation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C10/00—Adjustable resistors
- H01C10/30—Adjustable resistors the contact sliding along resistive element
- H01C10/32—Adjustable resistors the contact sliding along resistive element the contact moving in an arcuate path
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C10/00—Adjustable resistors
- H01C10/14—Adjustable resistors adjustable by auxiliary driving means
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Adjustable Resistors (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
- Mechanical Control Devices (AREA)
Abstract
The invention provides a variable resistance device which can be smoothly rotated with a constant torque when a shaft is operated by hand. The variable resistance device includes: a shaft (4) rotatably connected to the variable resistor (3); a gear (6) that is connected to the motor (5) and transmits a rotational force corresponding to the driving force of the motor (5) to the shaft (4); a connecting section (8) which connects the surface of the gear (6) and the shaft (4) with a predetermined connecting force in a disconnectable manner; and a restraining unit (9) that restrains rotation of the gear (6) with a restraining force that is greater than the predetermined coupling force and less than the rotational force of the gear (6).
Description
Technical Field
The present invention relates to a variable resistance device.
Background
Conventionally, for example, in an acoustic apparatus or the like, a variable resistance device is used to adjust a volume. The variable resistance device is generally formed such that an operator can adjust not only the volume by rotating a knob but also the volume by remotely operating a driving motor.
For example, patent document 1 discloses an electronic device in which a shaft connected to a knob is connected to a motor driven by remote operation via a plurality of gears. Such an electronic device is configured such that when the motor is driven, the shaft is rotated by the gear, and when the shaft is rotated, the shaft idles and the gear does not rotate.
Documents of the prior art
Patent document
Patent document 1: japanese Kokai publication Hei-4-111267
Disclosure of Invention
Problems to be solved by the invention
However, in the electronic device of patent document 1, since the shaft is directly coupled to the teeth of the gear, when the operator rotates the shaft, it is difficult to smoothly rotate the shaft with a constant torque due to backlash caused by the fitting play of the teeth of the gear.
The purpose of the present invention is to provide a variable resistance device that can be smoothly rotated with a constant torque when a shaft is manually operated.
Means for solving the problems
The variable resistance device of the present invention includes: a shaft rotatably connected to the variable resistor; a gear connected to the motor and transmitting a rotational force corresponding to a driving force of the motor to the shaft; a connecting portion for connecting the surface of the gear and the shaft with a predetermined connecting force in a disconnectable manner; and a restraining section that restrains rotation of the gear with a restraining force that is greater than the predetermined coupling force and smaller than a rotational force of the gear.
Effects of the invention
According to the present invention, when the shaft is operated by hand, the rotation operation can be smoothly performed with a constant torque.
Drawings
Fig. 1(a) and 1(b) are diagrams showing the structure of a variable resistance device according to embodiment 1 of the present invention.
Fig. 2 is a diagram showing the structure of the coupling portion.
Fig. 3 is a diagram showing a configuration of a variable resistance device according to embodiment 2.
Description of the reference numerals
1 casing
1a base
1b mounting plate
2 Gear support part
2a, 2b support holes
3 variable resistor
3a mounting screw
3b nut
3c shaft
4-shaft
4a shaft body
4b opposite part for connection
4c fixing part
4d recess
5 electric machine
6. 7 Gear
6a insert into the hole
6b axle part
6c, 6d surface
8 connecting part
8a connecting contact part
8b stop
8c, 21 adhesive part for connection
9 suppression section
9a suppressing contact part
10 bearing part
22 opposing part for suppressing
23 inhibiting adhesive part
Direction of thrust T
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings.
(embodiment mode 1)
Fig. 1(a) and 1(b) show the structure of a variable resistance device according to embodiment 1 of the present invention. The variable resistance device includes: a housing 1; a gear support portion 2; a variable resistor 3; a shaft 4; a motor 5; two gears 6, 7; a connecting portion 8; and a suppression section 9.
The housing 1 supports each part of the variable resistor device, and includes a base 1a and an attachment plate 1 b. The base 1a supports each part of the variable resistance device from below and has a flat plate shape. The mounting plate 1b is plate-shaped and is erected on the base 1a so as to form a side wall of the variable resistance device.
The gear support portion 2 supports the gears 6 and 7 so that the two gears 6 and 7 can rotate, and is disposed to face the mounting plate 1 b. A support hole 2a that supports the shaft portion of the gear 6 so that the shaft portion of the gear 6 is rotatable, and a support hole 2b that supports the shaft portion of the gear 7 so that the shaft portion of the gear 7 is rotatable are formed in the gear support portion 2.
The variable resistor 3 is provided to be able to change a resistance value in accordance with rotation of the shaft 4, and is attached to the mounting plate 1 b. Specifically, the resistor body is disposed on the outer side surface of the mounting plate 1b, and the mounting screw 3a and the shaft 3c of the resistor body are disposed so as to penetrate the mounting plate 1b and extend toward the inside of the case 1. The variable resistor 3 is fixed to the mounting plate 1b by a nut 3 b.
The shaft 4 is used for adjusting the resistance value of the variable resistor 3, and includes a shaft main body 4a, a coupling opposing portion 4b, and a fixing portion 4 c.
The shaft main body 4a has an elongated cylindrical shape extending from the outside of the housing 1 to the inside of the housing 1 through the support hole 2a of the gear support portion 2, and has a base end portion fixed to a not-shown knob and a tip end portion connected to the coupling opposing portion 4b so as to be integrated with the coupling opposing portion 4 b. A bearing 10 is disposed between the shaft body 4a and the gear support portion 2, and the shaft body 4a is rotatably supported by the bearing 10.
The coupling opposing portion 4b has a disk shape radially extending from the shaft main body 4a, and is disposed so that a surface thereof faces the gear 6.
The fixing portion 4c is disposed on the opposite side of the shaft main body 4a from the coupling opposing portion 4b, and is connected to the coupling opposing portion 4b so as to be integrated with the coupling opposing portion 4 b. The fixing portion 4c is formed in a cylindrical shape surrounding the shaft 3c of the variable resistor 3, and the shaft 3c is fixed on the inner side thereof. The fixing portion 4c is fixed to the shaft 3c by, for example, a socket set screw.
The motor 5 is a gear transmission motor having a built-in speed reducer, and is a motor that reduces the rotational speed and outputs its driving force. The motor 5 is disposed on the outer side surface of the mounting plate 1b adjacent to the variable resistor 3, and the output shaft of the motor 5 is disposed so as to penetrate the mounting plate 1b and extend toward the inside of the housing 1.
The gears 6 and 7 are arranged in parallel between the gear support portion 2 and the attachment plate 1b in a direction orthogonal to the shaft 4. The gears 6 and 7 are connected to an output shaft of the motor 5, and transmit torque, which is rotational force corresponding to the driving force of the motor 5, to the shaft 4. The gears 6 and 7 are so-called spur gears having a circular plate shape and having gear teeth cut parallel to the central axis formed on the outer peripheral surface thereof.
The gear 7 transmits a rotational force corresponding to the driving force of the motor 5 to the gear 6, and is disposed between the output shaft of the motor 5 and the gear 6 so as to mesh with each other.
The gear 6 transmits the rotational force transmitted from the gear 7 to the shaft 4, and has a larger diameter than the shaft main body 4 a. The gear 6 is disposed so that the central axis thereof is coaxial with the shaft main body 4 a. That is, the gear 6 is formed with an insertion hole 6a passing through the central axis, and the shaft body 4a is inserted into the insertion hole 6 a. Here, the gear 6 is disposed such that the surface 6c faces the gear support portion 2 and the surface 6d faces the coupling facing portion 4b of the shaft 4. The gear 6 has a shaft portion 6b protruding into the support hole 2a of the gear support portion 2. The shaft portion 6b has a cylindrical shape in which an insertion hole 6a is formed, and an outer peripheral surface thereof is rotatably supported by the gear support portion 2.
The coupling portion 8 is disposed between the gear 6 and the shaft 4, and couples the surface of the gear 6 and the shaft 4 with a predetermined coupling force so as to be disconnectable.
The suppressing portion 9 suppresses rotation of the gear 6 with a suppressing force larger than the coupling force of the coupling portion 8 and smaller than the rotational force of the gear 6 corresponding to the driving force of the motor 5, and has a suppressing abutment portion 9a protruding from the gear supporting portion 2 toward the surface 6c of the gear 6. The suppressing abutment portion 9a is disposed so that a distal end portion thereof abuts against the surface 6c of the gear 6, and suppresses rotation of the gear 6 by a frictional force with the surface 6c of the gear 6. That is, the suppression force of the suppression portion 9 includes a frictional force between the suppression abutment portion 9a and the surface 6c of the gear 6.
In addition, the gear 6 has a larger diameter than the shaft main body 4 a. Therefore, the inertial force around the rotation axis of the gear 6 is larger than the inertial force around the shaft main body 4a, and the rotation of the gear 6 with respect to the shaft main body 4a is suppressed. That is, the suppression force of the suppression unit 9 includes an inertial force around the rotation axis of the gear 6.
Next, the structure of the coupling portion 8 will be described in detail.
As shown in fig. 2, the coupling portion 8 includes a coupling abutting portion 8a, a stopper portion 8b, and a coupling adhesive portion 8 c.
The stopper 8b is configured to prevent the shaft 4 from moving in the thrust direction T, and is configured to engage with a recess 4d formed in the shaft main body 4 a. The recess 4d is formed corresponding to the outer surface of the bearing 10. The stopper 8b has a plate shape, and one surface thereof abuts against the inner surface of the recess 4d, and the other surface thereof abuts against the outer surface of the bearing 10. The stopper 8b may be formed of, for example, a so-called E-shaped stopper ring that radially sandwiches the shaft body 4 a.
The connecting abutment portion 8a is disposed between the gear 6 and the connecting opposing portion 4b of the shaft 4, and its surface abuts against the surface 6d of the gear 6 and the surface of the connecting opposing portion 4 b. Here, the connecting abutting portion 8a has an elastic force in the thrust direction T of the shaft 4, that is, an elastic force in a direction of separating the gear 6 and the connecting opposing portion 4 b. At this time, the movement of the shaft 4 in the thrust direction T is stopped by the stopper 8 b. Therefore, the connecting contact portion 8a presses the gear 6 and the connecting opposing portion 4b in the thrust direction T. Thus, friction is generated between the surface 6d of the gear 6 and the surface of the coupling opposing portion 4b in the coupling abutting portion 8a, and the gear 6 and the coupling opposing portion 4b can be coupled by the frictional force. That is, the coupling force of the coupling portion 8 includes a frictional force between the coupling abutting portion 8a and the surface 6d of the gear 6 and a frictional force between the coupling abutting portion 8a and the surface of the coupling opposing portion 4 b. The connecting contact portion 8a can be formed of a spring washer, for example.
The connecting adhesive portion 8c is disposed between the surface of the insertion hole 6a of the gear 6 and the surface of the shaft main body 4a, and has adhesive force for connecting the gear 6 and the shaft main body 4 a. That is, the coupling force of the coupling portion 8 includes the adhesive force of the coupling adhesive portion 8 c. The connecting viscous portion 8c can be made of grease or the like having relatively high viscosity.
Here, the frictional force of the connecting abutting portion 8a is larger than the adhesive force of the connecting adhesive portion 8c in the connecting force of the connecting portion 8. The coupling force of the coupling portion 8 is smaller than a suppression force including an inertial force acting on the gear 6 and a frictional force of the suppression contact portion 9 a.
Next, the operation of embodiment 1 will be explained.
First, the operator rotates the knob, and the shaft 4 shown in fig. 1(a) and 1(b) rotates together with the knob. This enables the resistance value of the variable resistor 3 connected to the shaft 4 to be changed.
At this time, the shaft 4 is connected not only to the variable resistor 3 but also to the gear 6 via the connecting portion 8. On the other hand, the rotation of the gear 6 is hindered by the suppression portion 9. Here, the connecting portion 8 connects the shaft 4 and the gear 6 with a connecting force smaller than a restraining force of the restraining portion 9 restraining rotation of the gear 6. Thus, when the shaft 4 rotates, the shaft 4 and the gear 6 are disconnected by the connecting portion 8 due to the restraining force of the restraining portion 9, and only the variable resistor 3 can be rotationally operated without rotating the gear 6.
The coupling portion 8 couples the gear 6 and the shaft 4 to each other so as to be disconnectable. Conventionally, for example, when a gear is fixed to a shaft and the shaft rotates, the gear and the motor are disconnected by a torque limiter or the like provided on the motor. Therefore, the gear rotates by the amount of the backlash between the gear teeth, that is, the so-called backlash, and the tactile sensation due to the rotation is transmitted to the operator via the shaft, and the operator may feel the sense of incongruity.
Therefore, the coupling portion 8 couples the gear 6 and the shaft 4 to be disconnectable, and the coupling between the shaft 4 and the gear 6 is disconnected according to the rotation of the shaft 4. Accordingly, since the gear 6 does not rotate with the rotation of the shaft 4, the operator does not feel the feeling of backlash and can smoothly rotate the shaft 4 with a constant torque.
In addition, conventionally, the coupling portion is disposed so as to couple the shaft to the teeth of the gear, and is configured to move on the teeth of the gear when the shaft is rotated. At this time, the coupling portion moves on the gear teeth of the gear having the concave and convex portions, and the tactile sensation caused by the movement is transmitted to the operator via the shaft, so that the operator may feel a sense of incongruity.
Therefore, the connecting abutting portion 8a connects the surface 6d of the gear 6 and the surface of the connecting opposing portion 4b to each other so as to be disconnectable. The coupling adhesive portion 8c couples the surface of the insertion hole 6a of the gear 6 to the surface of the shaft body 4a so as to be disconnectable. Thus, the coupling portion 8 disconnects the gear 6 from the shaft 4 so as to slide on the smooth surface of the gear 6, and therefore the operator can smoothly rotate the shaft 4 with a constant torque without feeling a sense of incongruity.
Further, since the connecting contact portion 8a is connected by the frictional force between the shaft 4 and the gear 6, the shaft 4 and the gear 6 can be easily connected to each other so as to be disconnectable.
Further, since the connecting adhesive portion 8c is connected by adhesion, the shaft 4 and the gear 6 can be easily connected to each other so as to be disconnectable.
On the other hand, the suppression portion 9 suppresses the rotation of the gear 6 with a suppression force larger than the coupling force of the coupling portion 8. Therefore, the rotation of the gear 6 can be reliably prevented.
Here, since the suppression force of the suppression portion 9 includes a frictional force between the suppression abutment portion 9a and the surface 6c of the gear 6, the rotation of the gear 6 can be more reliably suppressed. Further, the suppression force of the suppression portion 9 includes an inertial force acting on the gear 6, and the inertial force acting on the gear 6 is larger than the inertial force acting on the shaft 4, so that the rotation of the gear 6 can be more reliably prevented.
Further, it is preferable that the contact area of the restraining abutment 9a with the surface 6c of the gear 6 is larger than the contact area of the connecting abutment 8a with the surface 6d of the gear 6. This enables the suppression unit 9 to more reliably prevent the rotation of the gear 6.
Then, when the operator wirelessly operates the motor 5, for example, by a remote operation device, the motor 5 is driven in accordance with the operation, and the driving force of the motor 5 is transmitted to the gear 6 via the gear 7. Here, the rotation of the gear 6 is hindered by the suppression portion 9. However, since the suppression portion 9 suppresses the rotation of the gear 6 with a suppression force smaller than the rotational force of the gear 6 corresponding to the driving force of the motor 5, the gear 6 rotates against the suppression force of the suppression portion 9.
Here, the suppressing portion 9 suppresses rotation of the gear 6 by suppressing a frictional force between the abutting portion 9a and the surface 6c of the gear 6. The suppressing abutment portion 9a interrupts the suppression of the rotation of the gear 6 so as to slide on the smooth surface 6c of the gear 6, and therefore the gear 6 can be smoothly rotated.
As the gear 6 rotates, the shaft 4 coupled to the gear 6 via the coupling portion 8 rotates. At this time, since the shaft 4 is arranged to be smoothly rotatable without being hindered in rotation, the coupling by the coupling portion 8 is not disconnected in accordance with the rotation of the gear 6, and the coupling with the gear 6 can be maintained. Thereby, the shaft 4 smoothly rotates in accordance with the rotation of the gear 6, and the resistance value of the variable resistor 3 connected to the shaft 4 can be changed.
Also, by changing the resistance value of the variable resistor 3, for example, the sound volume of the acoustic apparatus is adjusted.
According to the present embodiment, the connecting portion 8 connects the surface of the gear 6 and the shaft 4 with a predetermined connecting force so as to be disconnectable, and the suppressing portion 9 suppresses the rotation of the gear 6 with a suppressing force larger than the predetermined connecting force. Accordingly, since the coupling portion 8 disconnects the gear 6 from the shaft 4 so as to slide on the surface of the gear 6 in response to the rotation of the shaft 4, the operator can smoothly rotate the shaft 4 with a constant torque without feeling a sense of incongruity.
(embodiment mode 2)
In embodiment 1 described above, the coupling portion 8 couples the surface of the gear 6 to the shaft 4 by the frictional force of the coupling abutting portion 8a and the adhesive force of the coupling adhesive portion 8c, but the present invention is not limited to this as long as the surface of the gear 6 and the shaft 4 can be coupled to each other so as to be disconnectable.
In embodiment 1, the suppression portion 9 suppresses rotation of the gear 6 by the frictional force of the suppression contact portion 9a, but is not limited thereto as long as rotation of the gear 6 can be suppressed.
For example, as shown in fig. 3, the adhesive portion for connection 8c of embodiment 1 may be eliminated, the adhesive portion for connection 21 may be disposed instead of the abutting portion for connection 8a, the opposing portion for suppression 22 may be disposed instead of the abutting portion for suppression 9a, and the adhesive portion for suppression 23 may be newly disposed.
The connecting adhesive portion 21 is disposed between the surface 6d of the gear 6 and the surface of the connecting opposing portion 4b of the shaft 4, and has an adhesive force for connecting the gear 6 and the connecting opposing portion 4 b. That is, the coupling force of the coupling portion 8 includes the adhesive force of the coupling adhesive portion 21. The connecting viscous part 21 may be made of, for example, grease with high viscosity.
The restraining facing portion 22 projects from the gear supporting portion 2 toward the surface 6c of the gear 6, and a tip end portion thereof is formed to face the surface 6c of the gear 6.
The suppressing adhesive portion 23 is disposed between the front surface 6c of the gear 6 and the distal end portion of the suppressing facing portion 22, and has an adhesive force for bonding the gear 6 and the suppressing facing portion 22 to each other. That is, the suppression force of the suppression portion 9 includes the adhesion force of the suppression adhesive portion 23. The viscosity-suppressing portion 23 may be made of, for example, grease having a high viscosity.
With such a configuration, as in embodiment 1, when the operator rotates the shaft 4, the resistance value of the variable resistor 3 is changed. At this time, the connecting portion 8 connects the shaft 4 and the gear 6 with a connecting force smaller than a restraining force with which the restraining portion 9 restrains rotation of the gear 6. Thus, when the shaft 4 rotates, the shaft 4 and the gear 6 are disconnected from each other by the restraining force of the restraining part 9, and only the variable resistor 3 can be rotationally operated without rotating the gear 6.
Here, the adhesive coupling portion 21 of the coupling portion 8 couples the surface 6d of the gear 6 and the surface of the coupling opposing portion 4b to each other by adhesive force so as to be disconnectable from each other. Thus, the coupling adhesive portion 21 disconnects the coupling between the gear 6 and the shaft 4 so as to slide on the smooth surface of the gear 6, and therefore the operator can smoothly rotate the shaft 4 with a constant torque without feeling a sense of incongruity.
At this time, the coupling adhesive portion 21 couples the gear 6 and the shaft 4 by adhesive force, and therefore the gear 6 and the shaft 4 can be coupled so as not to press the gear 6 and the shaft 4 in the thrust direction T.
On the other hand, the suppression unit 9 suppresses the rotation of the gear 6 with a suppression force larger than the coupling force of the coupling unit 8, and therefore, the rotation of the gear 6 can be reliably prevented.
Specifically, the inhibiting adhesive portion 23 adheres the distal end portion of the inhibiting facing portion 22 to the surface 6c of the gear 6, and thus can more reliably prevent the rotation of the gear 6.
Further, it is preferable that the facing area of the suppression facing portion 22 facing the surface 6c of the gear 6 is larger than the facing area of the connection facing portion 4b facing the surface 6d of the gear 6. Accordingly, the bonding area between the suppressing adhesive portion 23 and the gear 6 is larger than the bonding area between the coupling adhesive portion 21 and the gear 6, so that the suppressing force of the suppressing portion 9 can be reliably made larger than the coupling force of the coupling portion 8, and the rotation of the gear 6 can be more reliably prevented.
The inhibiting adhesive portion 23 may be made of a material having a higher adhesive force than the connecting adhesive portion 21.
Further, since the suppressing adhesive portion 23 suppresses the rotation of the gear 6 by the adhesive force, the rotation of the gear 6 can be suppressed so as not to press the gear 6 against the suppressing opposing portion 22.
Here, the gear 6 is formed with a larger diameter than the shaft 4. Therefore, the inertial force around the rotation axis of the gear 6 is larger than the inertial force around the shaft 4, and the inertial force is included in the suppression force of the suppression portion 9. Therefore, for example, even when the adhesion of the suppressing adhesive portion 23 is small, the coupling of the gear 6 and the shaft 4 via the coupling portion 8 can be easily disconnected in accordance with the rotation of the shaft 4, and the rotation of the gear 6 can be more reliably prevented.
When the motor 5 is driven by the operator, the driving force of the motor 5 is transmitted to the gear 6 via the gear 7. Here, the rotation of the gear 6 is hindered by the suppression portion 9. However, since the suppression portion 9 suppresses the rotation of the gear 6 with a suppression force smaller than the rotational force of the gear 6 corresponding to the driving force of the motor 5, the gear 6 rotates against the suppression force of the suppression portion 9.
At this time, the suppressing portion 9 suppresses the rotation of the gear 6 by suppressing the adhesive force of the adhesive portion 23. The suppressing viscous part 23 interrupts the suppression of the rotation of the gear 6 so as to slide on the smooth surface 6c of the gear 6, and therefore the gear 6 can be smoothly rotated.
According to the present embodiment, since the coupling adhesive portion 21 couples the gear 6 and the shaft 4 by adhesive force, the gear 6 and the shaft 4 can be coupled without pressing them in the thrust direction T. Further, since the rotation of the gear 6 is suppressed by the adhesive force of the suppressing adhesive portion 23, the rotation of the gear 6 can be suppressed so as not to press the gear 6 in the thrust direction T.
In embodiments 1 and 2, the suppression portion 9 is configured to abut against the surface 6c of the gear 6, but is not limited thereto as long as the rotation of the gear 6 can be suppressed.
In embodiments 1 and 2, the coupling portion 8 is disposed at a different position. For example, the connecting abutting portion 8a and the connecting adhesive portion 8c are disposed at different positions, but the present invention is not limited thereto as long as the gear 6 and the shaft 4 can be connected. For example, the connecting abutting portion 8a and the connecting adhesive portion 21 may be disposed between the surface 6d of the gear 6 and the connecting opposing portion 4 b.
Similarly, in embodiments 1 and 2, the suppression unit 9 may be disposed at the same position.
In embodiments 1 and 2, a plurality of gears 6 and 7 are disposed, but the present invention is not limited to this as long as the rotational force corresponding to the driving force of the motor 5 can be transmitted to the shaft 4.
The above embodiments are merely examples of embodying the present invention, and the technical scope of the present invention should not be limited by these embodiments. That is, the present invention can be implemented in various forms without departing from the gist or main features thereof. For example, the shapes, numbers, and the like of the respective parts described in the above description of the embodiments are merely examples, and can be implemented by being appropriately changed.
Industrial applicability
The variable resistance device of the present invention can be applied to a device in which a shaft for rotating a variable resistor is connected to a motor through a gear.
Claims (8)
1. A variable resistance device is characterized by comprising:
a shaft rotatably connected to the variable resistor;
a gear connected to a motor and transmitting a rotational force corresponding to a driving force of the motor to the shaft;
a connecting portion that connects a surface of the gear to the shaft with a predetermined connecting force so as to be disconnectable; and
and a restraining unit that restrains rotation of the gear with a restraining force that is greater than the predetermined coupling force and smaller than a rotational force of the gear.
2. The variable resistance device according to claim 1,
the connecting portion has a connecting abutting portion disposed between a surface of the gear and the shaft, and includes a frictional force between the connecting abutting portion and the gear and a frictional force between the connecting abutting portion and the shaft as the predetermined connecting force.
3. The variable resistance device according to claim 1,
the connecting portion has a connecting adhesive portion disposed between a surface of the gear and the shaft, and includes an adhesive force of the connecting adhesive portion as the predetermined connecting force.
4. The variable resistance device according to claim 3,
the gear has an insertion hole into which the shaft is inserted,
the adhesive part for connection is disposed between the surface of the insertion hole of the gear and the shaft.
5. The variable resistance device according to claim 3,
the shaft has a coupling opposing portion that opposes a surface of the gear,
the adhesive portion for connection is disposed between the surface of the gear and the opposing portion for connection.
6. The variable resistance device according to claim 1,
the suppression portion has a suppression abutment portion disposed so as to abut against a surface of the gear, and the suppression force of the suppression portion includes a frictional force between the suppression abutment portion and the gear.
7. The variable resistance device according to claim 1,
the gear has a larger diameter than the shaft,
the suppression force of the suppression portion includes an inertial force around a rotation axis of the gear.
8. The variable resistance device according to any one of claims 1 to 7,
the suppressing portion has a suppressing opposing portion that opposes a surface of the gear, and a suppressing adhesive portion that is disposed between the gear and the suppressing opposing portion, and the suppressing force of the suppressing portion includes an adhesive force of the suppressing adhesive portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-234001 | 2019-12-25 | ||
| JP2019234001A JP7360932B2 (en) | 2019-12-25 | 2019-12-25 | variable resistance device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113035477A true CN113035477A (en) | 2021-06-25 |
| CN113035477B CN113035477B (en) | 2024-04-19 |
Family
ID=76459058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011547082.3A Active CN113035477B (en) | 2019-12-25 | 2020-12-24 | Variable resistor device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7360932B2 (en) |
| CN (1) | CN113035477B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5855610Y2 (en) * | 1979-05-02 | 1983-12-20 | アルプス電気株式会社 | variable resistor |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113035477B (en) | 2024-04-19 |
| JP7360932B2 (en) | 2023-10-13 |
| JP2021103721A (en) | 2021-07-15 |
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