Non-contact rocker potentiometer

Abstract

The utility model provides a non-contact rocker potentiometer. The non-contact rocker potentiometer comprises a base, a cover shell, a metal piece, a support frame, a magnetic piece, a reset spring, a rocker structure, a non-contact Hall sensor, an FPC (Flexible Printed Circuit) board and an upper rocker arm, the rocker structure comprises a rocker and an arc-shaped rocking part, the arc-shaped rocking part is integrally formed at the lower part of the rocker, and a magnetic part is coaxially arranged at the bottom of the rocker; an annular elastic washer coaxial with the rocker is arranged at the bottom of the arc-shaped rocking part, and the annular elastic washer is correspondingly arranged on the outer side face of the rocker in a sleeving mode; a spring limiting space is formed between the outer side face of the supporting frame and the inner side wall of the base, the reset spring is arranged to be in a conical shape with the narrow upper end and the wide lower end, and the upper portion of the reset spring is correspondingly wound around the outer side face of the rocker and located below the arc-shaped rocking part. The lower portion of the reset spring extends into the spring limiting space and is wound on the outer side face of the supporting frame. The rocker can accurately find the gauge midpoint, and the resetting accuracy is high.

Description

Technical Field

[0001] The utility model relates to the technical field of potentiometers, in particular to a non-contact rocker potentiometer. Background Art

[0002] The Chinese patent application, with the publication number CN1218568558U and the publication date March 3, 2023, is titled "A New Electromagnetic Induction Rocker Potentiometer." The invention comprises a base, a magnetic induction circuit board, a base, a sliding plate, a rocker, a permanent magnet, and a top cover. The magnetic induction circuit board is mounted on the underside of the base, with a magnetic induction module mounted on top of the magnetic induction circuit board. The base includes a cavity, the sliding plate is mounted within the cavity, the rocker is mounted on the sliding plate, and the permanent magnet is mounted at the lower end of the rocker, engaging magnetic induction with the magnetic induction module. The top cover is mounted on the base, with a first central hole in the middle of the top cover for the rocker to pass through. The utility model comprises a magnetic induction circuit board with a magnetic induction module mounted on the underside of the base, a permanent magnet mounted at the lower end of the rocker, engaging magnetic induction with the magnetic induction module. As the rocker is shaken, the magnetic induction module senses changes in the magnetic field strength of the permanent magnet and outputs an induction signal. The utility model is compact, low-cost, and highly accurate. The defects of this existing technology are: a first spring seat is provided on the outer periphery of the cavity of the base, a second spring seat is provided on the lower side of the sliding plate, the lower end of the spring is installed on the first spring seat, and the upper end of the spring is installed under the second spring seat. Although such a structure can limit the spring and improve the accuracy of the regulation to a certain extent, it makes the overall internal structure of the rocker potentiometer more complicated and increases the overall weight of the product. In view of this situation, a rocker potentiometer with a simplified internal structure and good regulation return accuracy is urgently needed. Utility Model Content

[0003] In view of the above problems, the utility model provides a non-contact rocker potentiometer, the rocker can accurately find the center point of the gauge and has high reset accuracy.

[0004] In order to achieve the above-mentioned purpose, the present invention solves the problem through the following technical solutions: a non-contact rocker potentiometer, comprising a base, a cover shell, a nest piece, a support frame, a magnetic part, a reset spring, a rocker structure, a non-contact Hall sensor, an FPC board, and an upper rocker arm; the cover shell is arranged on the base to form an assembly space, the reset spring is arranged in the assembly space and is coaxial with the rocker structure; the top of the cover shell is provided with a first avoidance hole for the movement of the rocker structure, and the top of the upper rocker arm is provided with a second avoidance hole for the movement of the rocker structure; the upper rocker arm is rotatably installed in the assembly space; the FPC board is installed at the bottom of the inner cavity of the base, and the non-contact Hall sensor is installed at the bottom of the inner cavity of the base. The Hall sensor is correspondingly installed on the FPC board; the support frame is connected to the base through a positioning pin that passes through the FPC board; a wedge piece receiving groove for receiving the wedge piece is coaxially provided on the upper surface of the support frame, and the wedge piece is correspondingly arranged in the wedge piece receiving groove; a sensor receiving groove for receiving the non-contact Hall sensor is coaxially provided at the bottom of the support frame; the magnetic part is correspondingly arranged at the lower part of the inner cavity of the rocker structure and is coaxially arranged with the non-contact Hall sensor; the lower part of the rocker structure is arranged above the reset spring, and the upper part of the rocker structure passes through the second avoidance hole and the first avoidance hole in sequence and extends out of the cover shell.

[0005] The rocker structure includes a rocker and an arc-shaped rocking part, the arc-shaped rocking part being integrally formed at the lower part of the rocker, and the magnetic part is arranged coaxially with the bottom of the rocker; the bottom of the arc-shaped rocking part is provided with an annular elastic washer coaxial with the rocker, and the annular elastic washer is correspondingly sleeved on the outer side surface of the rocker; a spring limiting space is formed between the outer side surface of the support frame and the inner side wall of the base, and the return spring is arranged to be a cone with a narrow upper end and a wide lower end, and the upper part of the return spring is correspondingly wound around the outer side surface of the rocker and is located below the arc-shaped rocking part, the top of the return spring is in contact with the bottom of the annular elastic washer, and the annular elastic washer is in contact with the bottom of the arc-shaped rocking part under the elastic force of the return spring; the lower part of the return spring extends into the spring limiting space and is wound around the outer side surface of the support frame.

[0006] Preferably, the upper portion of the return spring is wound around the outer side of the rocker arm for more than half a circle.

[0007] Preferably, the number of the return springs wound around the outer side of the support frame is set to be more than half a circle.

[0008] Preferably, fastening parts are provided on opposite sides of the base, and fastening protrusions are formed on the outer side surface of the cover shell and at positions corresponding to each of the fastening parts; when in the assembled state, the fastening parts are correspondingly hooked on the fastening protrusions.

[0009] Preferably, the bottom of the rocker is provided with a magnetic component receiving groove with an opening at the lower end for receiving the magnetic component, and the corresponding cover on the bottom opening side of the rocker is provided with a touch portion that cooperates with the nest piece.

[0010] Preferably, the rocker is provided with a magnetic component mounting hole coaxially from the top, the magnetic component mounting hole extends to the position of the arc-shaped rocking portion, and the magnetic component is coaxially embedded in the bottom of the inner cavity of the magnetic component mounting hole.

[0011] Preferably, the cross section of the return spring is set to be circular or rectangular.

[0012] Preferably, lower arc-shaped grooves for accommodating the upper rocker arm are formed on opposite sides of the base, and upper arc-shaped grooves for accommodating the upper rocker arm are formed on opposite sides of the cover shell. When in the assembled state, the lower arc-shaped groove and the upper arc-shaped groove are combined to form mounting holes corresponding to the rotating pins on both sides of the upper rocker arm.

[0013] The beneficial effects of the present invention are as follows: the return spring is configured to be conical with a narrow upper end and a wide lower end, the upper part of the return spring is correspondingly wound around the outer side surface of the rocker and is located below the arc-shaped rocking part, the lower part of the return spring extends into the spring limiting space and is wound around the outer side surface of the support frame, thereby enabling the rocker structure to better find the center point and complete accurate centering action, with high return accuracy and simplified internal structure; an annular elastic washer coaxial with the rocker is provided at the bottom of the arc-shaped rocking part, the top of the return spring is in contact with the bottom of the annular elastic washer, and the annular elastic washer is in contact with the bottom of the arc-shaped rocking part under the elastic force of the return spring, and an upward pre-pressure is generated by the annular elastic washer, which assists and limits the return spring to be able to quickly and accurately complete the centering action. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an exploded view of the first embodiment of the present invention.

[0015] Figure 2 This is a three-dimensional view of the first embodiment of the present utility model.

[0016] Figure 3 This is a first cross-sectional view of the first embodiment of the present invention.

[0017] Figure 4 This is a cross-sectional view of the rocker structure in the second embodiment of the present invention.

[0018] The accompanying drawings are marked as: base 10, non-contact Hall sensor 12, FPC board 11, cover shell 16, nest piece 14, support frame 13, reset spring 15, upper rocker arm 17, trigger part 18, magnetic part 19, rocker 20, rotating pin 21, second avoidance hole 22, positioning pin 23, fastening part 24, fastening protrusion 25, annular elastic washer 26, nest piece receiving groove 27, arc-shaped rocking part 28, spring limiting space 29, lower arc-shaped groove 30, upper arc-shaped groove 31, rocker structure 32, first avoidance hole 33, magnetic part mounting hole 34. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below with reference to the embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0020] First embodiment, referring to Figure 1-3 As shown: A non-contact rocker potentiometer, including a base 10, a cover shell 16, a nest piece 14, a support frame 13, a magnetic member 19, a reset spring 15, a rocker structure 32, a non-contact Hall sensor 12, an FPC board 11, and an upper rocker arm 17; the cover shell 16 is covered on the base 10 to form an assembly space, the reset spring 15 is arranged in the assembly space and is coaxial with the rocker structure 32; the top of the cover shell 16 is provided with a first avoidance hole 33 for the rocker structure 32 to move, and the top of the upper rocker arm 17 is provided with a second avoidance hole 22 for the rocker structure 32 to move; the upper rocker arm 17 is rotatably installed in the assembly space; the FPC board 11 is installed at the bottom of the inner cavity of the base 10, and the non-contact Hall sensor 1 2 is mounted on the FPC board 11; the support frame 13 is connected to the base 10 via a positioning pin 23 that passes through the FPC board 11; a slot 27 for receiving the slot 14 is defined coaxially on the upper surface of the support frame 13, and the slot 14 is correspondingly disposed within the slot 27; a sensor receiving slot for receiving the non-contact Hall effect sensor 12 is defined coaxially on the bottom of the support frame 13; the magnetic member 19 is correspondingly disposed in the lower portion of the inner cavity of the rocker structure 32 and coaxially with the non-contact Hall effect sensor 12; the lower portion of the rocker structure 32 is disposed above the reset spring 15, and the upper portion of the rocker structure 32 sequentially passes through the second avoidance hole 22 and the first avoidance hole 33 and extends outside the cover 16;

[0021] The rocker structure 32 includes a rocker 20 and an arc-shaped rocking part 28. The arc-shaped rocking part 28 is integrally formed at the lower part of the rocker 20. A magnetic part 19 is provided coaxially with the bottom of the rocker 20; an annular elastic washer 26 is provided at the bottom of the arc-shaped rocking part 28, which is coaxial with the rocker 20. The annular elastic washer 26 is correspondingly sleeved on the outer side of the rocker 20; a spring limiting space 29 is formed between the outer side of the support frame 13 and the inner side wall of the base 10, and the return spring 15 is configured to be conical with a narrow upper end and a wide lower end. The upper part of the return spring 15 is correspondingly wound around the outer side of the rocker 20 and is located below the arc-shaped rocking part 28. The top of the return spring 15 is in contact with the bottom of the annular elastic washer 26. The annular elastic washer 26 is in contact with the bottom of the arc-shaped rocking part 28 under the elastic force of the return spring 15; the lower part of the return spring 15 extends into the spring limiting space 29 and is wound around the outer side of the support frame 13. Lower arcuate slots 30 for accommodating the upper rocker arm 17 are formed on opposite sides of the base 10, while upper arcuate slots 31 for accommodating the upper rocker arm 17 are formed on opposite sides of the cover 16. When assembled, the lower arcuate slots 30 and the upper arcuate slots 31 combine to form mounting holes corresponding to the pivot pins 21 on either side of the upper rocker arm 17. The return spring 15 has a circular or rectangular cross-section. The upper portion of the return spring 15 is wound around the outer surface of the rocker arm for at least half a turn. The return spring 15 is wound around the outer surface of the support frame 13 for at least half a turn.

[0022] In this embodiment, the return spring is configured to be conical with a narrow upper end and a wide lower end. The upper part of the return spring is correspondingly wound around the outer side surface of the rocker and is located below the arc-shaped rocking part. The lower part of the return spring extends into the spring limiting space and is wound around the outer side surface of the support frame, thereby enabling the rocker structure to better find the center point and complete accurate centering action, with high return accuracy and simplified internal structure; an annular elastic washer coaxial with the rocker is provided at the bottom of the arc-shaped rocking part, and the top of the return spring is in contact with the bottom of the annular elastic washer. The annular elastic washer is in contact with the bottom of the arc-shaped rocking part under the elastic force of the return spring, and an upward pre-pressure is generated by the annular elastic washer, which assists and limits the return spring to be able to quickly and accurately complete the centering action.

[0023] The base 10 is provided with fastening portions 24 on opposite sides thereof, and fastening protrusions 25 are formed on the outer side of the cover 16 at positions corresponding to the fastening portions 24. When assembled, the fastening portions 24 are hooked onto the corresponding fastening protrusions 25. This structural arrangement facilitates assembly.

[0024] The bottom of the rocker 20 has a magnetic slot with an opening at the lower end for accommodating the magnetic element 19. A trigger 18 is located on the corresponding side of the rocker 20's bottom opening, which mates with the tactile pad 14. This arrangement facilitates assembly of the magnetic element 19, and the interaction between the trigger 18 and the tactile pad 14 provides a pleasant tactile feel when pressed.

[0025] The second embodiment, referring to Figure 4 As shown, the rocker 20 has a magnetic mounting hole 34 extending from the top coaxially to the arc-shaped rocking portion 28. The magnetic member 19 is coaxially embedded in the bottom of the inner cavity of the magnetic member mounting hole 34. This structural arrangement facilitates the assembly of the magnetic member 19 and improves production efficiency.

[0026] The above examples represent only two implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A non-contact rocker potentiometer, comprising a base (10), a cover shell (16), a nest piece (14), a support frame (13), a magnetic member (19), a reset spring (15), a rocker structure (32), a non-contact Hall sensor (12), an FPC board (11), and an upper rocker arm (17); the cover shell (16) is arranged on the base (10) to form an assembly space, the reset spring (15) is arranged in the assembly space and is coaxial with the rocker structure (32); a first avoidance hole (33) for the rocker structure (32) to move is provided on the top of the cover shell (16), and a second avoidance hole (22) for the rocker structure (32) to move is provided on the top of the upper rocker arm (17); the upper rocker arm (17) is rotatably installed in the assembly space; the FPC board (11) is installed at the bottom of the inner cavity of the base (10), and the non-contact Hall sensor (12) is opposite to the rocker structure (32). It should be installed on the FPC board (11); the support frame (13) is connected to the base (10) through a positioning pin (23) that passes through the FPC board (11); the upper surface of the support frame (13) is coaxially provided with a nest piece receiving groove (27) for receiving the nest piece (14), and the nest piece (14) is correspondingly arranged in the nest piece receiving groove (27); the bottom of the support frame (13) is coaxially provided with a sensor receiving groove for receiving the non-contact Hall sensor (12); the magnetic member (19) is correspondingly arranged at the lower part of the inner cavity of the rocker structure (32) and is coaxially arranged with the non-contact Hall sensor (12); the lower part of the rocker structure (32) is arranged above the reset spring (15), and the upper part of the rocker structure (32) passes through the second avoidance hole (22) and the first avoidance hole (33) in sequence and extends out of the cover shell (16); It is characterized by: The rocker structure (32) includes a rocker (20) and an arc-shaped rocking portion (28), wherein the arc-shaped rocking portion (28) is integrally formed at the lower portion of the rocker (20), and the bottom of the rocker (20) is provided with the magnetic member (19) coaxially; the bottom of the arc-shaped rocking portion (28) is provided with an annular elastic washer (26) coaxially with the rocker (20), and the annular elastic washer (26) is correspondingly sleeved on the outer side surface of the rocker (20); a spring limiting space (29) is formed between the outer side surface of the support frame (13) and the inner side wall of the base (10), and the reset spring The spring (15) is configured to be tapered with a narrow upper end and a wide lower end. The upper portion of the return spring (15) is correspondingly wound around the outer side surface of the rocking arm (20) and is located below the arc-shaped rocking portion (28). The top of the return spring (15) is in contact with the bottom of the annular elastic washer (26). The annular elastic washer (26) is in contact with the bottom of the arc-shaped rocking portion (28) under the elastic force of the return spring (15). The lower portion of the return spring (15) extends into the spring limiting space (29) and is wound around the outer side surface of the support frame (13).

2. A non-contact rocker potentiometer according to claim 1, characterized in that: The number of times that the upper portion of the return spring (15) is wound around the outer side surface of the rocker (20) is set to be more than half a circle.

3. The non-contact rocker potentiometer according to claim 1, characterized in that: The number of the return spring (15) wound around the outer side of the support frame (13) is set to be more than half a circle.

4. The non-contact rocker potentiometer according to claim 1, characterized in that: Fastening portions (24) are provided on opposite sides of the base (10), and fastening protrusions (25) are formed on the outer side surface of the cover shell (16) and at positions corresponding to the fastening portions (24); when in an assembled state, the fastening portions (24) are correspondingly hooked on the fastening protrusions (25).

5. The non-contact rocker potentiometer according to claim 1, characterized in that: The bottom of the rocker (20) is provided with a magnetic component receiving groove for receiving the magnetic component (19) and having an opening at the lower end. The corresponding cover on the bottom opening side of the rocker (20) is provided with a touch portion (18) that cooperates with the nest piece (14).

6. The non-contact rocker potentiometer according to claim 1, characterized in that: The rocker (20) is provided with a magnetic component mounting hole (34) coaxially from the top, and the magnetic component mounting hole (34) extends to the position of the arc-shaped rocking portion (28), and the magnetic component (19) is coaxially embedded in the bottom of the inner cavity of the magnetic component mounting hole (34).

7. The non-contact rocker potentiometer according to claim 1, characterized in that: The cross section of the return spring (15) is arranged to be circular or rectangular.

8. A non-contact rocker potentiometer according to any one of claims 1 to 7, characterized in that: The base (10) is provided with lower arc-shaped grooves (30) on opposite sides for accommodating the upper rocker arm (17), and the cover shell (16) is provided with upper arc-shaped grooves (31) on opposite sides for accommodating the upper rocker arm (17). When in an assembled state, the lower arc-shaped grooves (30) and the upper arc-shaped grooves (31) are combined to form mounting holes corresponding to the rotating pins (21) on both sides of the upper rocker arm (17).

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