Potentiometer capable of automatically resetting

Abstract

The utility model belongs to the technical field of potentiometers, and discloses a potentiometer capable of resetting automatically. The potentiometer capable of automatically resetting comprises a base, a handle assembly, a PCB (Printed Circuit Board), a potentiometer body and a resetting assembly, the handle assembly comprises a rotating shaft and a handle. The reset assembly comprises a reset piece and an elastic piece. The two ends of the elastic piece are connected with the base and the reset piece respectively. When the handle is rotated, the handle assembly can drive the reset piece to rotate and enable the elastic piece to generate elastic deformation. When the handle is released, the elastic piece can drive the reset piece and the handle assembly to reset. The arrangement of the elastic piece and the reset piece enables the handle assembly to automatically reset, the reset speed is high, the reset result is accurate, and the accuracy of the measurement result of the potentiometer in subsequent use is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of potentiometers, in particular to a potentiometer capable of automatic resetting. Background Art

[0002] A potentiometer is an electromechanical component, which usually consists of a resistor body and a movable brush. When the brush moves along the resistor body, the resistance value of the resistor body can be changed, so as to realize the control of the voltage or current magnitude.

[0003] At present, the potentiometer adopts a connection between a rotating shaft and a brush. After the brush is driven to move by rotating or moving the rotating shaft, the rotating shaft cannot automatically reset, that is, the brush of the potentiometer cannot automatically reset, which affects the next use of the potentiometer. Therefore, it is necessary to manually reset the rotating shaft. Manually resetting the rotating shaft has the problem of inaccurate resetting of the rotating shaft, which affects the accuracy of the measurement result when the potentiometer is used subsequently. Content of the Utility Model

[0004] The purpose of the utility model is to provide a potentiometer capable of automatic resetting to solve the problem that the core shaft of the potentiometer cannot automatically reset, and the structure is simple, convenient for assembly, and ensures the accuracy of the measurement result.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A potentiometer capable of automatic resetting, comprising:

[0007] A base, the base is provided with a first mounting hole;

[0008] A handle assembly, including a rotating shaft and a handle, the rotating shaft is rotatably arranged in the first mounting hole, and the handle is fixed to the rotating shaft;

[0009] A PCB board, the PCB board is arranged on the base;

[0010] A potentiometer body, the potentiometer body is arranged on the PCB board, the brush of the potentiometer body is connected to the rotating shaft, and the rotation of the handle can drive the rotating shaft to drive the brush to move, so that the output voltage of the potentiometer body changes;

[0011] A reset assembly, including a reset member and an elastic member; the reset member is rotatably connected to the base, and two ends of the elastic member are respectively connected to the base and the reset member; when the handle is rotated, the handle assembly can drive the reset member to rotate and make the elastic member elastically deformed; when the handle is released, the elastic member can drive the reset member and the handle assembly to reset.

[0012] Preferably, the reset member is a V-shaped pull rod, which includes a first rod portion and a second rod portion. Two ends of the elastic member are respectively connected to the first rod portion and the base. One end of the second rod portion is rotatably connected to the base, and one side of the second rod portion close to the handle assembly is used for abutting against the handle assembly.

[0013] Preferably, the handle assembly further includes an abutting member fixedly connected to the handle. The abutting member includes a first abutting portion and a second abutting portion. The side surface of the second rod portion has a third abutting portion and a fourth abutting portion. The first abutting portion abuts against the third abutting portion, and the second abutting portion abuts against the fourth abutting portion to rotate the reset member.

[0014] Preferably, the abutting member further includes a sleeving portion. The rotating shaft passes through the sleeving portion. One side of the sleeving portion is connected to the first abutting portion, and the other side is connected to the second abutting portion. An avoidance groove is provided on the side surface of the second rod portion for avoiding the rotating shaft and the sleeving portion. The avoidance groove is provided between the third abutting portion and the fourth abutting portion.

[0015] Preferably, a first limiting member and a second limiting member are provided on the base. The handle is in a cover-like structure and is buckled on the base. First limiting portions and second limiting portions are provided on the inner wall of the handle. The first limiting member cooperates with the first limiting portion to limit the extreme position of the handle rotating in one direction, and the second limiting member cooperates with the second limiting portion to limit the extreme position of the handle rotating in the other direction.

[0016] Preferably, a connecting member is provided on the base. The elastic member is a spring. One end of the spring is connected to the connecting member, and the other end of the spring is connected to one end of the first rod portion far from the bending portion of the V-shaped pull rod.

[0017] Preferably, an anti-disengagement buckle is provided at the top end of the connecting member, and a groove is provided at one end of the first rod portion far from the bending portion of the V-shaped pull rod. The anti-disengagement buckle is used for limiting one end of the spring, and the other end of the spring is placed in the groove.

[0018] Preferably, a plurality of supporting members are provided on the base. The PCB board is fixed on the plurality of supporting members. The handle is located between the PCB board and the base, and one end of the rotating shaft penetrates through the PCB board.

[0019] Preferably, a heightening block is provided on the base. The reset member is in sliding fit with the top surface of the heightening block.

[0020] Preferably, a second mounting hole is further provided on the base, and the second mounting hole is used to mount the automatically resetable potentiometer on an external device.

[0021] Advantages of the present utility model:

[0022] The automatically resetable potentiometer provided by the present utility model includes a base, a handle assembly, a PCB board, a potentiometer body, and a reset assembly. The base is provided with a first mounting hole. The handle assembly includes a rotating shaft and a handle. The rotating shaft is rotatably arranged in the first mounting hole, and the handle is fixed to the rotating shaft. The PCB board is arranged on the base. The potentiometer body is arranged on the PCB board, and the brush of the potentiometer body is connected to the rotating shaft. When the handle rotates, the rotating shaft can drive the brush to move, so that the output voltage of the potentiometer body changes. The reset assembly includes a reset member and an elastic member. The reset member is rotatably connected to the base, and two ends of the elastic member are respectively connected to the base and the reset member. When the handle is rotated, the handle assembly can drive the reset assembly to rotate and cause the elastic member to undergo elastic deformation. When the handle is released, the elastic member can drive the reset member and the handle assembly to reset. The arrangement of the elastic member and the reset member enables the handle assembly to automatically reset. After the handle assembly rotates, the elastic member deforms, and the elastic force for the elastic member to recover deformation enables the handle assembly to drive the brush to reset. The reset speed is relatively fast, and the reset result is relatively accurate, ensuring the accuracy of the measurement result when the potentiometer is used subsequently. Description of the drawings

[0023] Figure 1 is a schematic structural diagram of the potentiometer provided by an embodiment of the present utility model;

[0024] Figure 2 is an exploded view of the potentiometer provided by an embodiment of the present utility model;

[0025] Figure 3 is a schematic structural diagram of the base and the reset assembly of the present utility model;

[0026] Figure 4 is a schematic structural diagram of the handle provided by an embodiment of the present utility model;

[0027] Figure 5 is a schematic structural diagram of the base provided by an embodiment of the present utility model.

[0028] In the figure:

[0029] 1. Base; 11. First mounting hole; 12. Second mounting hole; 13. First limiting member; 14. Second limiting member; 15. Connecting member; 151. Anti-release buckle; 16. Lifting block; 17. Third mounting hole;

[0030] 2. Handle assembly; 21. Handle; 211. First limiting part; 212. Second limiting part; 22. Rotating shaft; 23. Contact part; 231. First contact part; 2311. First contact end; 232. Second contact part; 2321. Second contact end; 233. Sheathed part;

[0031] 3. PCB board;

[0032] 4. Potentiometer body;

[0033] 5. Reset assembly; 51. Reset part; 511. First rod part; 5111. Groove; 512. Second rod part; 5121. Third contact part; 5122. Fourth contact part; 5123. Avoidance groove; 52. Elastic part; 53. Rivet;

[0034] 6. Support part; 61. Support column; 62. Connection part. Detailed implementation mode

[0035] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0036] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0038] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] As Figures 1 to 5 shown, the embodiment of the present utility model provides an automatically resetable potentiometer, which can be applied to fields such as unmanned aerial vehicles and is used to detect the flight speed of unmanned aerial vehicles. The automatically resetable potentiometer includes a base 1, a handle assembly 2, a PCB board 3, a potentiometer body 4, and a reset assembly 5. The base 1 is provided with a first mounting hole 11. The handle assembly 2 includes a rotating shaft 22 and a handle 21. The rotating shaft 22 is rotatably arranged in the first mounting hole 11, and the handle 21 is fixed to the rotating shaft 22. The PCB board 3 is arranged on the base 1. The potentiometer body 4 is arranged on the PCB board 3. The brush of the potentiometer body 4 is connected to the rotating shaft 22. When the handle 21 rotates, the rotating shaft 22 can drive the brush to move, causing the output voltage of the potentiometer body 4 to change. The reset assembly 5 includes a reset member 51 and an elastic member 52. The reset member 51 is rotatably connected to the base 1, and the two ends of the elastic member 52 are respectively connected to the base 1 and the reset member 51. When the handle 21 is rotated, the handle assembly 2 can drive the reset assembly 5 to rotate and cause the elastic member 52 to undergo elastic deformation. When the handle 21 is released, the elastic member 52 can drive the reset member 51 and the handle assembly 2 to reset.

[0040] The arrangement of the elastic member 52 and the reset member 51 enables the handle assembly 2 to automatically reset. After the handle assembly 2 rotates, the elastic member 52 deforms. The elastic force for the elastic member 52 to recover from deformation enables the handle assembly 2 to drive the brush to reset. The reset speed is relatively fast, and the reset result is relatively accurate, ensuring the accuracy of the measurement result when the potentiometer is used subsequently.

[0041] As Figure 3 and Figure 5 shown, the base 1 is further provided with a second mounting hole 12, which is used to mount the automatically resetable potentiometer on an external device. This facilitates the cooperation of the automatically resetable potentiometer with other devices or electronic components. Specifically, the material of the base 1 is plastic. When connecting the base 1 to other devices, the plastic material can play a role in protecting the base 1 and other devices, preventing the product from being broken due to collision.

[0042] As Figure 1 and Figure 3As shown in the figure, in order to make the overall structure of the self - resetting potentiometer more compact and facilitate the setting of the PCB board 3, a number of support members 6 are provided on the base 1. The PCB board 3 is fixed on the number of support members 6. The handle 21 is located between the PCB board 3 and the base 1, and one end of the rotating shaft 22 penetrates the PCB board 3. Specifically, in this embodiment, the PCB board 3 is made of fiberglass material, with resistors, capacitors and connection wire harnesses soldered on its surface. By soldering with the potentiometer body 4, it plays the role of connecting and fixing the potentiometer body 4 and transmitting signals. The support member 6 includes a support column 61 and a connecting portion 62 provided on the support column 61. The PCB board 3 is connected to the connecting portion 62. In order to play a better supporting role, the support column 61 is in a cross - shaped structure or a cylindrical structure.

[0043] As Figures 2 to 5 shown, the reset member 51 is a V - shaped pull rod. The V - shaped pull rod includes a first rod portion 511 and a second rod portion 512. Two ends of the elastic member 52 are respectively connected to the first rod portion 511 and the base 1. One end of the second rod portion 512 is rotatably connected to the base 1, and the side of the second rod portion 512 close to the handle assembly 2 is used to abut against the handle assembly 2. The structure of the reset assembly 5 in this embodiment is simple and convenient for assembly. Specifically, in this embodiment, the reset assembly 5 further includes a rivet 53. The base 1 is provided with a third mounting hole 17. One end of the second rod portion 512 far from the bent portion of the V - shaped pull rod is provided with a rivet through - hole. The rivet 53 can pass through the rivet through - hole and the third mounting hole 17 in sequence to connect the reset member 51 to the base 1.

[0044] As Figures 2 to 4 shown, in order to enable the handle assembly 2 to drive the reset member 51 to rotate smoothly, the handle assembly 2 further includes an abutting member 23. The abutting member 23 is fixedly connected to the handle 21. The abutting member 23 includes a first abutting portion 231 and a second abutting portion 232. The side of the second rod portion 512 has a third abutting portion 5121 and a fourth abutting portion 5122. The first abutting portion 231 abuts against the third abutting portion 5121, and the second abutting portion 232 abuts against the fourth abutting portion 5122 to enable the reset member 51 to rotate. In this embodiment, during the process of rotating the handle 21, the handle 21 can drive the first abutting portion 231 and the second abutting portion 232 to move. Since the first abutting portion 231 abuts against the third abutting portion 5121 of the second rod portion 512, and the second abutting portion 232 abuts against the fourth abutting portion 5122 of the second rod portion 512, when the handle 21 is rotated, the abutting member 23 can drive the reset member 51 to rotate.

[0045] Specifically, in this embodiment, the first abutting portion 231 includes a first abutting end 2311, the second abutting portion 232 includes a second abutting end 2321. The surfaces of the first abutting end 2311 and the second abutting end 2321 both have an arc structure. The first abutting end 2311 abuts against the third abutting portion 5121, and the second abutting end 2321 abuts against the fourth abutting portion 5122. The arc structure serves to protect the abutting member 23. The length of the first abutting portion 231 is greater than that of the second abutting portion 232. As Figure 3 and Figure 4 shown, when the handle 21 is rotated counterclockwise along the position shown in the figure, the first abutting portion 231 can drive the third abutting portion 5121 to rotate, causing the reset member 51 to rotate counterclockwise and stretching the elastic member 52; after releasing the handle 21, the elastic member 52 drives the reset member 51 and the handle assembly 2 to reset. Since the length of the fourth abutting portion 5122 is shorter and the end of the second rod portion 512 away from the bent portion is rotatably connected to the base 1, when the handle 21 is rotated clockwise along the Figure 4 position shown in the figure, the second abutting portion 232 abuts against the fourth abutting portion 5122, causing the reset member 51 to rotate counterclockwise and stretching the elastic member 52; after releasing the handle 21, the elastic member 52 drives the reset member 51 and the handle assembly 2 to reset.

[0046] Furthermore, in order to make the structure of the self - resetting potentiometer more compact, the abutting member 23 further includes a sleeving portion 233 for the rotating shaft 22 to pass through. One side of the sleeving portion 233 is connected to the first abutting portion 231, and the other side is connected to the second abutting portion 232; an avoidance groove 5123 is provided on the side surface of the second rod portion 512 for avoiding the rotating shaft 22 and the sleeving portion 233. The avoidance groove 5123 is provided between the third abutting portion 5121 and the fourth abutting portion 5122. In this embodiment, the sleeving portion 233 is a cylindrical structure, and the rotating shaft 22 passes through the cylindrical structure. In order to reduce the volume of the base 1, make the self - resetting potentiometer applicable to more occasions and reduce production costs, the handle 21 has a semicircular structure, and the side passing through the diameter is an open portion. The rotating shaft 22 partially protrudes from the open portion, and the first abutting portion 231 and the second abutting portion 232 are respectively located on both sides of the rotating shaft 22. Preferably, in order to facilitate manual rotation of the handle 21, the side of the handle 21 away from the open portion is provided with anti - slip corrugations in the circumferential direction, and the material of the handle 21 is plastic. In other embodiments, the side of the handle 21 away from the open portion may be provided with anti - slip materials in the circumferential direction.

[0047] To prevent the handle 21 from falling off during the rotation of the handle 21, a first limiting member 13 and a second limiting member 14 are provided on the base 1; the handle 21 is a cover-shaped structure buckled on the base 1, and a first limiting portion 211 and a second limiting portion 212 are provided on the inner wall of the handle 21. The first limiting member 13 cooperates with the first limiting portion 211 to limit the extreme position of the handle 21 rotating in one direction, and the second limiting portion 212 cooperates with the second limiting member 14 to limit the extreme position of the handle 21 rotating in the other direction.

[0048] As Figure 3 shown, to facilitate the installation of the elastic member 52, a connecting member 15 is provided on the base 1. The elastic member 52 is a spring, one end of the spring is connected to the connecting member 15, and the other end of the spring is connected to one end of the first rod portion 511 away from the bent portion of the V-shaped pull rod.

[0049] Furthermore, a anti-disengagement buckle 151 is provided at the top end of the connecting member 15, and a groove 5111 is provided at one end of the first rod portion 511 away from the bent portion of the V-shaped pull rod. The anti-disengagement buckle 151 is used to limit one end of the spring, and the other end of the spring is placed in the groove 5111. The settings of the anti-disengagement buckle 151 and the groove 5111 make the connection between the spring and the base 1 more stable, preventing the spring from falling off during the deformation process.

[0050] Preferably, as Figure 5 shown, to improve the smoothness of the rotation of the reset member 51 on the base 1, a heightening block 16 is provided on the base 1, and the reset member 51 is slidably fitted with the top surface of the heightening block 16.

[0051] When assembling the self-resetting potentiometer, the potentiometer body 4 is welded and fixed to the PCB board 3 to form a semi-finished PCB board. One end of the spring is placed in the groove 5111 of the reset member 51, the other end of the spring is fixed to the connecting member 15 on the base 1, and the reset member 51 is rotatably connected to the base 1 by a rivet 53 to form a semi-finished base. The rotating shaft 22 is inserted into the first mounting hole 11 to assemble the handle assembly 2 onto the semi-finished base. Finally, the semi-finished PCB board is assembled onto the base 1 through the support member 6, and the semi-finished PCB board and the support member 6 are riveted and fixed by a riveting device to form the final self-resetting potentiometer product.

[0052] When the self-resetting potentiometer is in use, as Figure 2 and Figure 3 shown, by rotating the handle 21 clockwise or counterclockwise, the position of the brush in the potentiometer body 4 is changed, so that the self-resetting sensor outputs different voltage signals, and the reset assembly 5 can make the handle assembly 2 drive the brush to reset.

[0053] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A potentiometer capable of automatic reset, characterized in that: include: A base (1), wherein the base (1) is provided with a first mounting hole (11); A handle assembly (2), comprising a rotating shaft (22) and a handle (21), wherein the rotating shaft (22) is rotatably disposed in the first mounting hole (11), and the handle (21) is fixed to the rotating shaft (22); A PCB board (3), wherein the PCB board (3) is arranged on the base (1); A potentiometer body (4), wherein the potentiometer body (4) is arranged on the PCB board (3), a brush of the potentiometer body (4) is connected to the rotating shaft (22), and the rotation of the handle (21) can cause the rotating shaft (22) to drive the brush to move, thereby causing the output voltage of the potentiometer body (4) to change; A reset assembly (5) comprises a reset member (51) and an elastic member (52); the reset member (51) is rotatably connected to the base (1), and two ends of the elastic member (52) are respectively connected to the base (1) and the reset member (51); when the handle (21) is rotated, the handle assembly (2) can drive the reset member (51) to rotate and cause the elastic member (52) to undergo elastic deformation; when the handle (21) is released, the elastic member (52) can drive the reset member (51) and the handle assembly (2) to reset.

2. The automatically resettable potentiometer according to claim 1, characterized in that: The reset member (51) is a V-shaped pull rod, which includes a first rod portion (511) and a second rod portion (512). The two ends of the elastic member (52) are respectively connected to the first rod portion (511) and the base (1), one end of the second rod portion (512) is rotatably connected to the base (1), and the side of the second rod portion (512) close to the handle assembly (2) is used to abut against the handle assembly (2).

3. The automatically resettable potentiometer according to claim 2, characterized in that: The handle assembly (2) further comprises an abutment member (23), wherein the abutment member (23) is fixedly connected to the handle (21), and the abutment member (23) comprises a first abutment portion (231) and a second abutment portion (232); the side surface of the second rod portion (512) comprises a third abutment portion (5121) and a fourth abutment portion (5122), wherein the first abutment portion (231) abuts against the third abutment portion (5121), and the second abutment portion (232) abuts against the fourth abutment portion (5122), so as to enable the reset member (51) to rotate.

4. The automatically resettable potentiometer according to claim 3, characterized in that: The abutment member (23) further comprises a sleeve portion (233), the rotating shaft (22) is passed through the sleeve portion (233), one side of the sleeve portion (233) is connected to the first abutment portion (231), and the other side is connected to the second abutment portion (232); a side surface of the second rod portion (512) is provided with an avoidance groove (5123) for avoiding the rotating shaft (22) and the sleeve portion (233), and the avoidance groove (5123) is arranged between the third abutment portion (5121) and the fourth abutment portion (5122).

5. The automatically resettable potentiometer according to claim 1, characterized in that: The base (1) is provided with a first limiting member (13) and a second limiting member (14); the handle (21) is a cover-shaped structure and is buckled on the base (1); the inner wall of the handle (21) is provided with a first limiting portion (211) and a second limiting portion (212); the first limiting member (13) cooperates with the first limiting portion (211) to limit the extreme position of the handle (21) when rotating in one direction; the second limiting member (14) cooperates with the second limiting portion (212) to limit the extreme position of the handle (21) when rotating in another direction.

6. The automatically resettable potentiometer according to claim 2, characterized in that: A connecting piece (15) is provided on the base (1); the elastic piece (52) is a spring; one end of the spring is connected to the connecting piece (15); and the other end of the spring is connected to an end of the first rod portion (511) away from the bending portion of the V-shaped pull rod.

7. The automatically resettable potentiometer according to claim 6, characterized in that: The top end of the connecting member (15) is provided with an anti-drop buckle (151), and the end of the first rod portion (511) away from the bending portion of the V-shaped pull rod is provided with a groove (5111), the anti-drop buckle (151) is used to limit one end of the spring, and the other end of the spring is placed in the groove (5111).

8. The automatically resettable potentiometer according to any one of claims 1 to 7, characterized in that: A plurality of support members (6) are arranged on the base (1), the PCB board (3) is fixed on the plurality of support members (6), the handle (21) is located between the PCB board (3) and the base (1), and one end of the rotating shaft (22) passes through the PCB board (3).

9. The automatically resettable potentiometer according to any one of claims 1 to 7, characterized in that: The base (1) is provided with a padding block (16), and the resetting member (51) is slidably matched with the top surface of the padding block (16).

10. The automatically resettable potentiometer according to any one of claims 1 to 7, characterized in that: The base (1) is also provided with a second mounting hole (12), and the second mounting hole (12) is used to mount the automatically resettable potentiometer on an external device.

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