Durable potentiometer

Abstract

The utility model relates to the technical field of potentiometers, in particular to a durable potentiometer, which comprises a shell, a rotating arm, a resistor disc and a shell, a cavity is arranged in the shell, the resistor disc is arranged at one end in the cavity, one side of the resistor disc is connected with a terminal, a pin of the terminal protrudes out of the outer side of the shell, and the rotating arm is arranged in the shell. The rotating arm is rotatably arranged in the cavity, an electric brush is arranged at one end of the rotating arm, a resistor body is arranged on the resistor disc, and the electric brush is in contact with and abuts against the resistor body; a metal limiting piece is arranged on one side of the rotating arm, a limiting groove is formed in the inner wall of the cavity, and the metal limiting piece is arranged in the limiting groove in a sliding mode. The rotating arm is novel in structure and ingenious in design, and the rotating range of the rotating arm is limited through cooperation of the metal limiting piece and the limiting groove; the positioning precision and rotation angle control accuracy of the potentiometer are ensured, and the service life of the potentiometer is prolonged.

Description

Technical Field

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

[0002] Potentiometers are variable resistors widely used in electronic devices to adjust voltage or current in circuits. Traditional potentiometers typically consist of a shaft, a resistor element secured within a housing, and a sleeve for limiting position. Plastic bumps and retaining grooves work together between the housing and sleeve to limit the shaft's rotation angle, ensuring smooth operation within a predetermined range.

[0003] However, this traditional design has significant defects. Specifically, due to the physical properties of plastic materials, such as relatively low hardness and susceptibility to environmental factors (such as temperature changes), plastic bumps are prone to wear and deformation under long-term use. This wear not only reduces the positioning accuracy of the potentiometer, resulting in inaccurate control of the rotation angle, but also accelerates the overall aging process of the potentiometer, shortening its service life. In addition, when the potentiometer is working under high load or frequent use, the wear problem of the plastic bump will be more prominent. As the shape of the bump gradually changes, the fitting clearance between the shaft core and the sleeve increases, which may cause the operating feel to deteriorate, or even cause a jamming phenomenon, seriously affecting the user experience and product reliability. Therefore, the existing potentiometer limit structure has obvious problems of insufficient durability and stability. Summary of the Invention

[0004] The utility model aims to solve the problems of the prior art and provides a durable potentiometer with a novel structure and ingenious design. The metal limiter cooperates with the limit groove to limit the rotation range of the rotating arm, thereby ensuring the positioning accuracy of the potentiometer and accurate control of the rotation angle, thereby increasing the service life of the potentiometer.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The utility model provides a durable potentiometer, which includes a shell, a rotating arm, a resistor and a shell, the interior of the shell is set as a cavity, the resistor is set at one end of the cavity, one side of the resistor is connected to a terminal, the pin of the terminal protrudes from the outside of the shell, the rotating arm is rotatably set in the cavity, one end of the rotating arm is provided with a brush, the resistor is provided on the resistor, and the brush contacts and abuts the resistor; one side of the rotating arm is provided with a metal limiter, the inner wall of the cavity is provided with a limit groove, and the metal limiter is slidably set in the limit groove.

[0007] The rotating arm includes a shaft core and a shaft sleeve, the shaft sleeve is provided on the periphery of one end of the shaft core, the brush is provided on the shaft sleeve, and one end of the metal limiter is riveted to the shaft core and / or the shaft sleeve.

[0008] Wherein, a riveted positioning portion is provided on the shaft core, a positioning opening is provided at one end of the metal limiting member, and the riveted positioning portion is clamped in the positioning opening.

[0009] Preferably, the metal limiting member is arranged in an L-shape.

[0010] Wherein, the rotating arm also includes a torsion spring, which is sleeved on the outer periphery of the shaft core, and the two radially extended ends of the torsion spring are respectively located on both sides of the metal limiter, and the two radially extended ends of the torsion spring are respectively in contact with the inner wall of the cavity.

[0011] The inner wall of the cavity is provided with reset grooves for cooperating with the two radially extended end portions of the torsion spring.

[0012] A gap is provided between the shaft core and the sleeve, the torsion spring is located in the gap, an opening is provided on one side of the sleeve, and the two radially extended ends of the torsion spring extend from the opening to both sides of the metal limiter.

[0013] Wherein, a back cover is provided at one end of the shell, and the back cover is used to seal one end of the cavity.

[0014] The other end of the shaft core passes through the other end of the cavity and then protrudes out of the other end of the shell. The other end of the shell is also equipped with an E-type clamping ring.

[0015] Among them, the other end of the shaft core is also provided with a connecting bracket that is detachably connected, the other end of the shaft core is provided with a buckle groove, and the buckle groove is buckled with a buckle ring, and the buckle ring is used to lock the connecting bracket at the other end of the shaft core, and the other end of the shaft core is provided with a limiting portion for abutting the connecting bracket; one end of the connecting bracket is provided with a socket for the other end of the shaft core to pass through, and the other end of the connecting bracket is provided with at least two mounting holes.

[0016] Beneficial effects of the utility model:

[0017] The utility model has a novel structure and an ingenious design. Under the above-mentioned setting, when working, the rotating arm rotates, driving the brush to rotate synchronously, and the brush and the resistor body made of dots cooperate to contact and abut to realize the control of the potentiometer. Among them, since a metal limiter is provided on one side of the rotating arm, the rotation range of the rotating arm is limited by the cooperation of the metal limiter and the limiting groove. In addition, since the metal limiter is made of metal, it is not easily affected by the external temperature environment and is not easily affected by wear and deformation, thereby ensuring the positioning accuracy of the potentiometer and accurate control of the rotation angle, and increasing the service life of the potentiometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of a durable potentiometer of the present utility model.

[0019] Figure 2 This is a structural schematic diagram of a durable potentiometer from another perspective of the present utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the utility model after the shell and the back cover are hidden.

[0021] Figure 4 This is an exploded view of the structure of the utility model after the shell and back cover are hidden.

[0022] Figure 5 This is a structural exploded view of the cooperative connection between the rotating arm and the connecting bracket of the utility model.

[0023] Figure 6 It is a structural schematic diagram of the shell of the utility model.

[0024] exist Figures 1 to 6 Reference numerals in the figures include:

[0025] 1. Housing; 2. Rotating arm; 3. Resistor; 4. Cavity; 5. Brush; 6. Metal limiter; 7. Limiting groove; 8. Shaft core; 9. Bushing; 10. Riveted positioning part; 11. Positioning opening; 12. Torsion spring; 13. Reset groove; 14. Opening; 15. Back cover; 16. E-type retaining ring; 17. Connecting bracket; 18. Buckle groove; 19. Buckle ring; 20. Limiter; 21. Socket; 22. Mounting hole; 23. Fixing hole. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0027] Example 1

[0028] A durable potentiometer, such as Figures 1 to 6As shown, it includes a shell 1, a rotating arm 2, a resistor 3 and a shell 1, wherein the shell 1 is a plastic shell 1, the interior of the shell 1 is set as a cavity 4, the resistor 3 is set at one end of the cavity 4, one side of the resistor 3 is connected to a terminal, the pin of the terminal protrudes from the outside of the shell 1, the rotating arm 2 is rotatably set in the cavity 4, one end of the rotating arm 2 is provided with a brush 5, the resistor 3 is provided with a resistor body, and the brush 5 contacts and abuts the resistor body; a metal limiter 6 is provided on one side of the rotating arm 2, and a limiting groove 7 is provided on the inner wall of the cavity 4, and the metal limiter 6 is slidably set in the limiting groove 7. Specifically, the utility model has a novel structure and ingenious design. Under the above-mentioned setting, when working, the rotating arm 2 rotates, driving the brush 5 to rotate synchronously, and the brush 5 cooperates with the resistor body made of dots to contact and abut to realize the control of the potentiometer; among them, since a metal limiter 6 is provided on one side of the rotating arm 2, the rotation range of the rotating arm 2 is limited by the cooperation of the metal limiter 6 and the limiting groove 7; in addition, since the metal limiter 6 is made of metal, it is not easily affected by the external temperature environment, and is not easily affected by wear and deformation, thereby ensuring the positioning accuracy of the potentiometer and accurate control of the rotation angle, and increasing the service life of the potentiometer.

[0029] Preferably, the metal limiter 6 is made of aluminum alloy, stainless steel or other materials.

[0030] In the embodiment of the present application, the rotating arm 2 includes a shaft core 8 and a shaft sleeve 9. The shaft sleeve 9 is provided on the outer periphery of one end of the shaft core 8, the brush 5 is provided on the shaft sleeve 9, and one end of the metal stopper 6 is riveted to the shaft core 8 and / or the shaft sleeve 9. Specifically, the shaft sleeve 9 can protect one end of the shaft core 8, which is conventional technology and will not be further described here.

[0031] In the embodiment of the present application, a riveted positioning portion 10 is provided on the shaft core 8, and a positioning opening 11 is provided at one end of the metal stopper 6. The riveted positioning portion 10 is locked in the positioning opening 11. Specifically, after the positioning opening 11 is engaged with the riveted positioning portion 10, one end of the metal stopper 6 is riveted onto the shaft core 8, resulting in a strong structural stability and not easy to loosen.

[0032] Preferably, the metal limiting member 6 is arranged in an L-shape. Specifically, under this arrangement, the structure is stable, and the occupied space is further reduced, making the structure of the utility model compact.

[0033] In the embodiment of the present application, the rotating arm 2 further includes a torsion spring 12, which is sleeved on the outer periphery of the shaft core 8. The two radially extended ends of the torsion spring 12 are respectively located on both sides of the metal limiter 6, and the two radially extended ends of the torsion spring 12 are respectively in contact with the inner wall of the cavity 4. A gap is provided between the shaft core 8 and the sleeve 9, and the torsion spring 12 is located within the gap. An opening 14 is provided on one side of the sleeve 9, and the two radially extended ends of the torsion spring 12 extend from the opening 14 to both sides of the metal limiter 6. Specifically, under the above-mentioned setting, the torsion spring 12 is accommodated in the gap, and the space between the sleeve 9 and the shaft core 8 is reasonably utilized, which is conducive to reducing the occupied space and making the structure of the present invention more compact. The opening 14 is provided to facilitate the two radially extended ends of the torsion spring 12 to extend from the opening 14 to both sides of the metal limiter 6.

[0034] In the embodiment of the present application, the inner wall of the cavity 4 is provided with a reset groove 13 for cooperating with the two radially extended ends of the torsion spring 12. Specifically, under the above arrangement, the two ends of the torsion spring 12 are limited and abutted, making it convenient for the torsion spring 12 to reset.

[0035] In the embodiment of the present application, a back cover 15 is provided at one end of the housing 1, and the back cover 15 is used to seal one end of the cavity 4. Specifically, under the above arrangement, a sealing effect is achieved.

[0036] In the embodiment of the present application, the other end of the shaft core 8 passes through the other end of the cavity 4 and then protrudes out of the other end of the housing 1. The other end of the housing 1 is also equipped with an E-shaped retaining ring 16. Specifically, under the above arrangement, the other end of the shaft core 8 passes through the other end of the cavity 4 and is fixed with the E-shaped retaining ring 16. The E-shaped retaining ring 16 is made of an insulating material, which facilitates the rotation of the shaft core 8.

[0037] Example 2

[0038] In the second embodiment of the present application, Figure 5As shown, the other end of the shaft core 8 is also provided with a detachably connected connecting bracket 17, the other end of the shaft core 8 is provided with a buckle groove 18, and the buckle groove 18 is buckled with a buckle ring 19, and the buckle ring 19 is used to lock the connecting bracket 17 at the other end of the shaft core 8, and the other end of the shaft core 8 is provided with a limiting portion 20 for abutting the connecting bracket 17; one end of the connecting bracket 17 is provided with a socket 21 for the other end of the shaft core 8 to pass through, and the other end of the connecting bracket 17 is provided with at least two mounting holes 22. Specifically, during assembly, after the other end of the shaft core 8 is passed through the socket 21, the connecting bracket 17 is abutted against the limiting portion 20 of the shaft core 8 to limit the connecting bracket 17, and then the buckle 19 is buckled into the buckle groove 18 to tighten the connecting bracket 17 and lock the connecting bracket 17 to prevent the connecting bracket 17 from loosening; further, the mounting hole 22 of the connecting bracket 17 is used to cooperate with the external screw to facilitate locking the utility model on external equipment, which is easy to use.

[0039] Example 3

[0040] In the third embodiment of the present application, fixing holes 23 are provided on both sides of the housing 1; the fixing holes 23 are convenient for cooperating with external screws, so as to facilitate locking the utility model on external equipment and facilitate use.

[0041] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention is disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of the above-disclosed technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention, which do not depart from the content of the technical solution of the present invention, are within the scope of the technical solution of the present invention.

Claims

1. A durable potentiometer, characterized in that: The utility model comprises a shell, a rotating arm, a resistor sheet and a shell, wherein the interior of the shell is set as a cavity, the resistor sheet is set at one end of the cavity, one side of the resistor sheet is connected to a terminal, the pin of the terminal protrudes from the outside of the shell, the rotating arm is rotatably set in the cavity, one end of the rotating arm is provided with a brush, the resistor sheet is provided with a resistor body, and the brush contacts and abuts the resistor body; a metal limiter is provided on one side of the rotating arm, and a limit groove is provided on the inner wall of the cavity, and the metal limiter is slidably set in the limit groove.

2. A durable potentiometer according to claim 1, characterized in that: The rotating arm includes a shaft core and a shaft sleeve. The shaft sleeve is provided on the periphery of one end of the shaft core. The brush is provided on the shaft sleeve. One end of the metal limiter is riveted to the shaft core and / or the shaft sleeve.

3. A durable potentiometer according to claim 2, characterized in that: The shaft core is provided with a riveted positioning portion, one end of the metal limiting piece is provided with a positioning opening, and the riveted positioning portion is clamped in the positioning opening.

4. A durable potentiometer according to any one of claims 1 to 3, characterized in that: The metal limiting piece is arranged in an L shape.

5. The durable potentiometer according to claim 2, characterized in that: The rotating arm also includes a torsion spring, which is sleeved on the outer circumference of the shaft core. The two radially extended ends of the torsion spring are respectively located on both sides of the metal limiter, and the two radially extended ends of the torsion spring are respectively in contact with the inner wall of the cavity.

6. The durable potentiometer according to claim 5, characterized in that: The inner wall of the cavity is provided with reset grooves for cooperating with the two radially extended end portions of the torsion spring.

7. The durable potentiometer according to claim 5, characterized in that: A gap is provided between the shaft core and the sleeve, the torsion spring is located in the gap, an opening is provided on one side of the sleeve, and the two radially extended ends of the torsion spring extend from the opening to both sides of the metal limiter.

8. The durable potentiometer according to claim 1, characterized in that: A rear cover is provided at one end of the shell, and the rear cover is used to seal one end of the cavity.

9. The durable potentiometer according to claim 2, characterized in that: The other end of the shaft core passes through the other end of the cavity and then protrudes out of the other end of the shell. The other end of the shell is also equipped with an E-type clamping ring.

10. The durable potentiometer according to claim 2, characterized in that: The other end of the shaft core is also provided with a connecting bracket that is detachably connected, the other end of the shaft core is provided with a buckle groove, and the buckle groove is buckled with a buckle ring, and the buckle ring is used to lock the connecting bracket to the other end of the shaft core, and the other end of the shaft core is provided with a limiting portion for abutting the connecting bracket; one end of the connecting bracket is provided with a socket for the other end of the shaft core to pass through, and the other end of the connecting bracket is provided with at least two mounting holes.

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