Durable potentiometer

Abstract

The present utility model relates to the technical field of potentiometers, and in particular to a durable potentiometer, which comprises a housing, a rotating arm and a resistive plate; the inside of the housing is configured as a cavity, the resistive plate being arranged at one end in the cavity; a terminal is connected to one side of the resistive plate, pins of the terminal protruding outwards from the outer side of the housing; the rotating arm is rotatably arranged in the cavity, one end of the rotating arm being provided with a wiper; a resistive element is provided on the resistive plate, and the wiper is in contact with and abuts against the resistive element; one side of the rotating arm is provided with a metal limiting member, and the inner wall of the cavity is provided with a limiting slot, the metal limiting member being slidably arranged in the limiting slot. The present utility model features novel structure and ingenious design; the cooperation of the metal limiting member and the limiting slot achieves limitation of the rotation range of the rotating arm; positioning accuracy and precise rotation angle control of the potentiometer are ensured, and the service life of the potentiometer is prolonged.

Description

Durable potentiometer TECHNICAL FIELD

[0001] The utility model relates to potentiometer technical field especially is a kind of durable potentiometer. BACKGROUND

[0002] Potentiometer is a kind of variable resistance element widely used in electronic equipment, for adjusting voltage or current in circuit. The structure of traditional potentiometer usually includes a shaft core, a resistance body fixed in the shell and a shaft sleeve for limiting. The rotation angle of shaft core is limited by the cooperation of plastic bump and limiting groove between shell and shaft sleeve, to ensure that potentiometer can operate smoothly within the predetermined range.

[0003] However, this traditional design has significant defects. Specifically, due to the physical properties of plastic material, such as relatively low hardness and susceptibility to environmental factors (such as temperature changes), the plastic bump is prone to wear and deformation over time. This wear not only reduces the positioning accuracy of the potentiometer, leading to inaccurate rotation angle control, but also accelerates the overall aging process of the potentiometer, shortening its service life. In addition, when the potentiometer works in high-load or frequently used environments, the wear problem of the plastic bump will be more prominent. As the shape of the bump gradually changes, the fitting gap between the shaft core and the shaft sleeve increases, which may cause poor operation feel and even jamming phenomenon, seriously affecting user experience and product reliability. Therefore, the existing potentiometer limiting structure has obvious problems of insufficient durability and stability.

[0004] SUMMARY

[0005] The utility model provides a durable potentiometer for the prior art problem, novel structure, clever design, the rotation range of rotating arm is limited by the cooperation of metal limiting piece and limiting groove;Ensure the positioning accuracy of potentiometer and rotation angle control accurate, increase the service life of potentiometer.

[0006] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0007] The utility model provides a durable potentiometer, it includes shell, rotating arm, resistance sheet and shell, the inside of shell is provided with cavity, the resistance sheet is arranged in one end in the cavity, the side of resistance sheet is connected with terminal, the pin of terminal protrudes the outside of shell, rotating arm rotation is arranged in the cavity, the one end of rotating arm is provided with brush, be provided with resistance body on resistance sheet, and the brush is in contact with resistance body and abuts;One side of rotating arm is provided with metal limiting piece, the inner wall of cavity is provided with limiting groove, and the metal limiting piece is slidably arranged in the limiting groove.

[0008] The rotating arm comprises a shaft core and a shaft sleeve, the outer periphery of one end of the shaft core is provided with the shaft sleeve, the brush is arranged on the shaft sleeve, and one end of the metal limiting piece is riveted and connected with the shaft core and / or the shaft sleeve.

[0009] The shaft core is provided with a riveted positioning portion, and one end of the metal limiting piece is provided with a positioning opening.

[0010] Preferably, the metal limiting piece is arranged in an L shape.

[0011] The rotating arm further comprises a torsion spring, the torsion spring is sleeved on the outer periphery of the shaft core, the two ends of the torsion spring radially led out are respectively located on the two sides of the metal limiting piece, and the two ends of the torsion spring radially led out are respectively in abutment with the inner wall of the cavity.

[0012] The inner wall of the cavity is provided with a reset groove used for cooperating with the two ends of the torsion spring radially led out.

[0013] The shaft core and the shaft sleeve are provided with a gap, the torsion spring is located in the gap, one side of the shaft sleeve is provided with an opening, and the two ends of the torsion spring radially led out are stretched out to the two sides of the metal limiting piece from the opening.

[0014] One end of the shell is provided with a rear cover used for sealing one end of the cavity.

[0015] The other end of the shaft core protrudes out of the other end of the shell, and the other end of the shell is further provided with an E-shaped clasp ring.

[0016] The other end of the shaft core is further provided with a detachably connected connecting support, the other end of the shaft core is provided with a buckle groove, a buckle ring is buckled on the buckle groove, the buckle ring is used for locking the connecting support on the other end of the shaft core, the other end of the shaft core is provided with a limiting portion used for abutting against the connecting support, one end of the connecting support is provided with a plug hole for the other end of the shaft core to pass through, and the other end of the connecting support is provided with at least two mounting holes.

[0017] The utility model discloses the beneficial effects of:

[0018] The utility model discloses novel structure, clever design is under the setting, rotates, drives the synchronous rotation of brush, and the contact of brush and point makes the resistance body cooperation and realizes the control of potentiometer, wherein, because the one side of rotating arm is provided with metal limit piece, and the rotation range of rotating arm is limited through the cooperation of metal limit piece and limit recess, in addition, because adopting metal limit piece, its material is metal, is not easy to be influenced by outside temperature environment, is not easy to be abraded and deformed, guarantees the positioning accuracy and rotation angle control accuracy of potentiometer, increases the service life of potentiometer. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is a durable potentiometer structure schematic diagram of the utility model.

[0020] Fig. 2 is another view structure schematic diagram of a durable potentiometer of the utility model.

[0021] Fig. 3 is the structure schematic diagram of the utility model hidden shell and rear cover.

[0022] Fig. 4 is the structure exploded view of the utility model hidden shell and rear cover.

[0023] Fig. 5 is the structure exploded view of the utility model rotating arm and connecting support cooperation connection.

[0024] Fig. 6 is the structure schematic diagram of the shell of the utility model.

[0025] The reference numerals in Fig. 1 to Fig. 6 include:

[0026] 1, shell, 2, rotating arm, 3, resistance sheet, 4, cavity, 5, brush, 6, metal limit piece, 7, limit recess, 8, shaft core, 9, shaft sleeve, 10, riveting positioning part, 11, positioning mouth, 12, torsion spring, 13, reset recess, 14, opening, 15, rear cover, 16, E type snap ring, 17, connecting support, 18, buckle groove, 19, buckle ring, 20, limit part, 21, jack, 22, mounting hole, 23, fixed hole. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of those skilled in the art, the utility model is further explained below in conjunction with examples and drawings, and the content mentioned in the implementation manner is not the limitation of the utility model. The utility model is described in detail below in conjunction with the drawings.

[0028] Example one

[0029] A durable potentiometer, as shown in FIG. 1 to FIG. 6, comprising a shell 1, a rotating arm 2, a resistance sheet 3 and the shell 1, the shell 1 is a plastic shell 1, the inside of the shell 1 is provided with a cavity 4, the resistance sheet 3 is arranged at one end in the cavity 4, one side of the resistance sheet 3 is connected with a terminal, the pin of the terminal protrudes out of the outside of the shell 1, the rotating arm 2 is rotatably arranged in the cavity 4, one end of the rotating arm 2 is provided with a brush 5, the resistance sheet 3 is provided with a resistance body, the brush 5 is in contact with the resistance body; one side of the rotating arm 2 is provided with a metal limiting piece 6, the inner wall of the cavity 4 is provided with a limiting groove 7, the metal limiting piece 6 is slidably arranged in the limiting groove 7. Specifically, the utility model has novel structure and ingenious design, under the above setting, in working, the rotating arm 2 rotates, drives the brush 5 to rotate synchronously, the brush 5 is in contact with the resistance body to realize the control of the potentiometer; wherein, one side of the rotating arm 2 is provided with the metal limiting piece 6, the rotation range of the rotating arm 2 is limited by the cooperation of the metal limiting piece 6 and the limiting groove 7; in addition, the metal limiting piece 6 is made of metal, is not easy to be affected by external temperature environment, is not easy to be abraded and deformed, ensures the positioning accuracy and rotation angle control accuracy of the potentiometer, and increases the service life of the potentiometer.

[0030] Preferably, the metal limiting piece 6 is made of aluminum alloy, stainless steel or the like.

[0031] In the embodiment of the application, the rotating arm 2 comprises a shaft core 8 and a shaft sleeve 9, the shaft sleeve 9 is arranged on the outer periphery of one end of the shaft core 8, the brush 5 is arranged on the shaft sleeve 9, and one end of the metal limiting piece 6 is riveted and connected with the shaft core 8 and / or the shaft sleeve 9. Specifically, the shaft sleeve 9 can protect one end of the shaft core 8, and the conventional technology will not be described here.

[0032] In the embodiment of the application, the shaft core 8 is provided with a riveting positioning part 10, one end of the metal limiting piece 6 is provided with a positioning port 11, and the riveting positioning part 10 is clamped in the positioning port 11. Specifically, after the positioning port 11 and the riveting positioning part 10 are cooperatively inserted, one end of the metal limiting piece 6 is riveted on the shaft core 8, so that the structure is stable and not easy to loosen.

[0033] Preferably, the metal limiting piece 6 is arranged in an L shape. Specifically, under this arrangement, the structure is stable, the occupied space can be further reduced, and the structure of the utility model is compact.

[0034] In the embodiment of the application, the rotating arm 2 further comprises a torsion spring 12, the torsion spring 12 is sleeved on the outer periphery of the shaft core 8, the two ends of the torsion spring 12 radially guided are respectively located on the two sides of the metal limiting piece 6, the two ends of the torsion spring 12 radially guided are respectively in abutment with the inner wall of the cavity 4, the shaft core 8 and the shaft sleeve 9 are provided with a gap, the torsion spring 12 is located in the gap, one side of the shaft sleeve 9 is provided with an opening 14, the two ends of the torsion spring 12 radially guided are stretched out from the opening 14 to the two sides of the metal limiting piece 6. Specifically, under the above setting, the torsion spring 12 is accommodated in the gap, the space between the shaft sleeve 9 and the shaft core 8 is reasonably utilized, which is beneficial to reduce the occupied space, so that the structure of the utility model is more compact; the opening 14 is provided, which facilitates the two ends of the torsion spring 12 radially guided to stretch out from the opening 14 to the two sides of the metal limiting piece 6.

[0035] In the embodiment of the application, the inner wall of the cavity 4 is provided with a reset groove 13 for cooperating with the two ends of the torsion spring 12 radially guided. Specifically, under the above setting, the two ends of the torsion spring 12 are limited and abutted, which facilitates the reset of the torsion spring 12.

[0036] In the embodiment of the application, one end of the shell 1 is provided with a rear cover 15, the rear cover 15 is used for sealing one end of the cavity 4. Specifically, under the above setting, the sealing effect is achieved.

[0037] In the embodiment of the application, the other end of the shaft core 8 protrudes out of the other end of the shell 1 after penetrating through the other end of the cavity 4, and the other end of the shell 1 is further provided with an E-shaped snap ring 16. Specifically, under the above setting, the other end of the shaft core 8 is fixed with the E-shaped snap ring 16 after penetrating through the other end of the cavity 4, the E-shaped snap ring 16 is made of insulating material, which is beneficial to the rotation of the shaft core 8.

[0038] Embodiment two

[0039] In the second embodiment of the present application, as shown in Fig. 5, the other end of the shaft core 8 is further provided with a detachable connecting bracket 17, the other end of the shaft core 8 is provided with a clamping groove 18, a clamping ring 19 is clamped on the clamping groove 18, the clamping ring 19 is used to lock the connecting bracket 17 at the other end of the shaft core 8, the other end of the shaft core 8 is provided with a limiting portion 20 for abutting against the connecting bracket 17; one end of the connecting bracket 17 is provided with a insertion hole 21 for the other end of the shaft core 8 to pass through, the other end of the connecting bracket 17 is provided with at least two mounting holes 22. Specifically, in assembly, after the other end of the shaft core 8 passes through the insertion hole 21, the connecting bracket 17 abuts against the limiting portion 20 of the shaft core 8, the connecting bracket 17 is limited, then the clamping ring 19 is clamped into the clamping groove 18, the connecting bracket 17 is realized to be tightly abutted and locked, so as to prevent the connecting bracket 17 from loosening; further, the mounting holes 22 of the connecting bracket 17 are matched with external screws, so as to facilitate locking the utility model on external equipment, and the utility model is convenient to use.

[0040] Embodiment three

[0041] In the third embodiment of the present application, the two sides of the shell 1 are provided with fixing holes 23; the fixing holes 23 are matched with external screws, so as to facilitate locking the utility model on external equipment, and the utility model is convenient to use.

[0042] The above is only the preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as above, it is not used to limit the utility model. Any skilled person in the art can make some changes or modifications without departing from the technical scheme of the utility model, and the equivalent embodiments with equivalent changes are equivalent to the above-mentioned disclosed technical content. Any simple modification, equivalent change and modification of the above embodiments are within the scope of the technical scheme of the utility model.

Claims

1. A robust potentiometer, characterized by: The utility model provides a resistance piece, a rotating arm and a brush are arranged in the cavity of the shell, the resistance piece is connected with the terminal, the terminal's pin protrudes outside the shell, the rotating arm rotates and is arranged in the cavity, the brush is arranged on the resistance piece, the brush and the resistance piece contact abutment, the rotating arm one side is provided with metal limiting piece, the cavity inner wall is provided with limiting groove, the metal limiting piece sliding is arranged in the limiting 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 arranged on the outer periphery of one end of the shaft core, the brush is arranged on the shaft sleeve, one end of the metal limiting piece is riveted and connected with the shaft core and / or the shaft sleeve.

3. A durable potentiometer according to claim 1, 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 port, and the riveted positioning portion is clamped in the positioning port.

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

5. A rugged potentiometer according to claim 2, characterized in that: The rotating arm further includes a torsion spring, the torsion spring is sleeved on the outer periphery of the shaft core, the two ends of the torsion spring directed radially are located on the two sides of the metal limiting piece respectively, and the two ends of the torsion spring directed radially are in abutment with the inner wall of the cavity respectively.

6. A rugged potentiometer according to claim 5, characterized in that: The inner wall of the cavity is provided with a reset groove for cooperating with the two ends of the torsion spring directed radially.

7. A rugged potentiometer as claimed in claim 5, characterized in that: The shaft core and the shaft sleeve are provided with a gap, the torsion spring is located in the gap, one side of the shaft sleeve is provided with an opening, and the two ends of the torsion spring directed radially extend out of the opening to the two sides of the metal limiting piece.

8. A durable potentiometer as defined in claim 1, wherein: One end of the shell is provided with a rear cover for sealing one end of the cavity.

9. A rugged potentiometer as claimed in claim 2, characterized in that: The other end of the shaft core protrudes out of the other end of the shell through the other end of the cavity, and the other end of the shell is further provided with an E-shaped clasp.

10. A rugged potentiometer as claimed in claim 1, characterized in that: The other end of the shaft core is further provided with a detachably connected connecting bracket, the other end of the shaft core is provided with a buckle groove, a buckle ring is buckled on the buckle groove, the buckle ring is used for locking the connecting bracket on the other end of the shaft core, and the other end of the shaft core is provided with a limiting portion for abutting against the connecting bracket; one end of the connecting bracket is provided with a insertion hole 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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