Non-contact rocker potentiometer

Abstract

The invention provides a non-contact rocker potentiometer. The non-contact rocker potentiometer comprises a base, a cover shell, a metal piece, a supporting frame, a magnetic part, a reset spring, a rocker structure, a non-contact Hall sensor, an FPC 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 invention relates to the technical field of potentiometers, and in particular to a non-contact rocker potentiometer. Background Art

[0002] The Chinese patent authorization announcement number is CN1218568558U, and the authorization announcement date is March 3, 2023. The invention name is a new type of electromagnetic induction rocker potentiometer, including a bottom shell, a magnetic induction circuit board, a base, a sliding disk, a rocker, a permanent magnet and an upper cover. The magnetic induction circuit board is installed on the lower side of the base, and a magnetic induction module is installed on the magnetic induction circuit board; the base includes a cavity, the sliding disk is installed in the cavity of the base, the rocker is installed on the sliding disk, and the lower end of the rocker is installed with the permanent magnet, and the permanent magnet and the magnetic induction module are magnetically matched; the upper cover is installed on the base, and the middle part of the upper cover is provided with a first middle hole for the rocker to pass through. The utility model installs the magnetic induction circuit board with the magnetic induction module on the lower side of the base, and installs the permanent magnet at the lower end of the rocker, and the permanent magnet and the magnetic induction module are magnetically matched. As the rocker shakes, the magnetic induction module senses the change of the magnetic field strength of the permanent magnet and outputs an induction signal. The utility model is small in size, low in cost, and high in induction accuracy. The defects of the prior art are: a first spring seat is provided on the 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 gauge 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 gauge return accuracy is urgently needed. Summary of the invention

[0003] In view of the above problems, the present invention provides a non-contact rocker potentiometer, in which the rocker can accurately find the midpoint of the gauge and has high reset accuracy.

[0004] 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 socket 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 coaxially arranged with the rocker structure; a first avoidance hole for the movement of the rocker structure is opened on the top of the cover shell, and a second avoidance hole for the movement of the rocker structure is opened on the top of the upper rocker arm; 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 The sensor is correspondingly installed on the FPC board; the support frame is connected to the base by corresponding positioning pins that penetrate the FPC board; a socket piece receiving groove for receiving the socket piece is coaxially opened on the upper surface of the support frame, and the socket piece is correspondingly arranged in the socket piece receiving groove; a sensor receiving groove for receiving the non-contact Hall sensor is coaxially opened on the bottom of the support frame; the magnetic part is correspondingly arranged in 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 sequentially penetrates the second avoidance hole and the first avoidance hole 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 is integrally formed at the lower part of the rocker, and the magnetic part is arranged coaxially with the bottom of the rocker; an annular elastic gasket coaxial with the rocker is arranged at the bottom of the arc-shaped rocking part, and the annular elastic gasket 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 located below the arc-shaped rocking part, the top of the return spring is in contact with the bottom of the annular elastic gasket, and the annular elastic gasket 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 number of times that the upper portion of the return spring is wound around the outer side surface of the rocker arm is set to be 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 of the cover shell and at positions corresponding to the fastening parts; when in the assembled state, the fastening parts are correspondingly hooked on the fastening protrusions.

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

[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, the base is formed on two opposite sides to form a lower arc groove for accommodating the upper rocker arm, and the cover shell is formed on two opposite sides to form an upper arc groove for accommodating the upper rocker arm. When in the assembled state, the lower arc groove and the upper arc 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 arranged in a cone shape with a narrow upper end and a wide lower end, the upper part of the return spring is wound correspondingly to the outer side surface of the rocker and is located below the arc-shaped rocking part, and 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 arranged 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 achieve rapid and accurate centering action. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 2 It is a three-dimensional view of the first embodiment of the present invention.

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

[0017] Figure 4 It 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 gasket 26, nest piece storage 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 is further described in detail below in conjunction with examples and drawings, but the embodiments of the present invention are not limited thereto.

[0020] The 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 coaxially arranged with the rocker structure 32; a first avoidance hole 33 for the rocker structure 32 to move is opened on the top of the cover shell 16, and a second avoidance hole 22 for the rocker structure 32 to move is opened 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 1 2 is correspondingly installed on the FPC board 11; the support frame 13 is connected to the base 10 by the positioning pin 23 correspondingly penetrating 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 sequentially penetrates the second avoidance hole 22 and the first avoidance hole 33 and extends out of the cover shell 16;

[0021] The rocker structure 32 includes a rocker 20 and an arc-shaped rocking portion 28. The arc-shaped rocking portion 28 is integrally formed at the lower part of the rocker 20. A magnetic member 19 is coaxially arranged at the bottom of the rocker 20; an annular elastic washer 26 coaxial with the rocker 20 is arranged at the bottom of the arc-shaped rocking portion 28, and 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 reset spring 15 is configured to be a cone with a narrow upper end and a wide lower end. The upper part of the reset spring 15 is correspondingly wound around the outer side of the rocker 20 and is located below the arc-shaped rocking portion 28. The top of the reset spring 15 is in contact with the bottom of the annular elastic washer 26, and the annular elastic washer 26 is in contact with the bottom of the arc-shaped rocking portion 28 under the elastic force of the reset spring 15; the lower part of the reset spring 15 extends into the spring limiting space 29 and is wound around the outer side of the support frame 13. The lower arc groove 30 for accommodating the upper rocker arm 17 is formed on the opposite sides of the base 10, and the upper arc groove 31 for accommodating the upper rocker arm 17 is formed on the opposite sides of the cover shell 16. When in the assembled state, the lower arc groove 30 and the upper arc groove 31 are combined to form mounting holes corresponding to the rotating pins 21 on both sides of the upper rocker arm 17. The cross section of the return spring 15 is set to be circular or rectangular. The number of the upper part of the return spring 15 wound around the outer side of the rocker is set to be more than half a circle. 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.

[0022] In the present embodiment, the return spring is configured to be a cone with a narrow upper end and a wide lower end. The upper part of the return spring is wound around the outer side surface of the rocker arm and is located below the arc-shaped rocking portion. 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 arm structure to better find the center point and complete accurate centering action. The return accuracy is high and the internal structure is simplified. An annular elastic washer coaxial with the rocker arm is provided at the bottom of the arc-shaped rocking portion. 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 portion 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 achieve a quick and accurate centering action.

[0023] The base 10 is provided with fastening parts 24 on opposite sides, and fastening protrusions 25 are formed on the outer side of the cover shell 16 and at positions corresponding to the fastening parts 24; when in the assembled state, the fastening parts 24 are correspondingly hooked on the fastening protrusions 25. Such a structural setting facilitates assembly.

[0024] The bottom of the rocker 20 is provided with a magnetic member receiving groove with an opening at the lower end for receiving the magnetic member 19, and the bottom opening side of the rocker 20 is provided with a touch portion 18 that cooperates with the socket piece 14. This structural arrangement facilitates the assembly of the magnetic member 19, and the cooperation structure of the touch portion 18 and the socket piece 14 can achieve a good pressing touch.

[0025] The second embodiment, referring to Figure 4 As shown: the rocker 20 is provided with a magnetic component mounting hole 34 from the top coaxially, 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 and arranged at the bottom of the inner cavity of the magnetic component mounting hole 34. Through such a structural setting, it is convenient to assemble the magnetic component 19 and improve production efficiency.

[0026] The above embodiments only express two implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached 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 covered on the base (10) to form an assembly space, the reset spring (15) is arranged in the assembly space and is coaxially arranged with the rocker structure (32); a first avoidance hole (33) for the rocker structure (32) to move is opened on the top of the cover shell (16), and a second avoidance hole (22) for the rocker structure (32) to move is opened 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 upper rocker arm (17). 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); a nest piece storage groove (27) for storing the nest piece (14) is coaxially opened on the upper surface of the support frame (13), and the nest piece (14) is correspondingly arranged in the nest piece storage groove (27); a sensor storage groove for storing the non-contact Hall sensor (12) is coaxially opened on the bottom of the support frame (13); 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 in that The rocker structure (32) comprises 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 magnetic member (19) is coaxially arranged at the bottom of the rocker (20); an annular elastic washer (26) coaxially arranged with the rocker (20) is arranged at the bottom of the arc-shaped rocking portion (28), 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 (29) is arranged on the inner side wall of the base (10); 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); and 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 part 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. A non-contact rocker potentiometer according to claim 1, characterized in that: The number of the return springs (15) wound around the outer side of the support frame (13) is set to be more than half a circle.

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

5. A non-contact rocker potentiometer according to claim 1, characterized in that: The bottom of the rocker (20) is provided with a magnetic component storage groove for storing the magnetic component (19) and having an opening at the lower end, and the bottom opening side of the rocker (20) is covered with a trigger part (18) that cooperates with the nest piece (14).

6. A 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, 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 at the bottom of the inner cavity of the magnetic component mounting hole (34).

7. A 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) for accommodating the upper rocker arm (17) on opposite sides, and the cover shell (16) is provided with upper arc-shaped grooves (31) for accommodating the upper rocker arm (17) on opposite sides. 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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