Potentiometer with compact structure

Abstract

The utility model relates to the technical field of potentiometers, and discloses a potentiometer with a compact structure, which comprises a rotary electric brush, a resistor disc, a substrate, a lock plate cover and a clamping lock structure, the resistor disc is attached to the upper end surface of the substrate; the rotary electric brush is rotatably connected to the substrate; the resistor disc is provided with a ring-shaped resistor paint layer which is in electric contact with the rotary electric brush; the outer diameter of the resistance paint layer is 12 to 15mm; the thickness of the resistor disc is 0.2 to 0.5 mm; and the locking plate cover is matched with the substrate and is fixed on the substrate through the clamping and locking structure so as to press and fix the resistor disc on the substrate. The compact-structure potentiometer provided by the utility model has the advantages of small volume design, small occupied space and compact structure, is particularly suitable for being mounted in electronic equipment with limited space, effectively improves the integration level and portability of the equipment, is better applied to various miniaturized and integrated electronic equipment, and is suitable for popularization and application. Such as smart watches, unmanned aerial vehicles, portable medical equipment and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to potentiometer technical field, in particular to a compact structure potentiometer. BACKGROUND

[0002] With the rapid development of electronic technology, various electronic devices and systems have increasingly higher requirements for the miniaturization and integration of components. As a common adjusting component in electronic circuits, potentiometers are widely used in volume control, position sensing, current regulation and other fields. Due to the limitations of structural design, traditional potentiometers are often large in size, which cannot meet the efficient use of space requirements of modern electronic devices. For example, a patent application number CN202321475984.X discloses a rotary potentiometer easy to assemble, which comprises an insulating shell, one side of the insulating shell is provided with a containing cavity, the containing cavity is installed with a resistance sheet and a rotating brush clamped between the insulating shell and the containing cavity, the insulating shell and the resistance sheet are connected through a clamping structure, and each conductive terminal of the rotating brush is respectively in electrical contact with the corresponding resistance paint on the resistance sheet. However, the rotary potentiometer easy to assemble sets the containing cavity for mounting the resistance sheet on the insulating shell, which can easily increase the structural volume and occupy a large space, and cannot be well applied to various miniaturized and integrated electronic devices such as smart watches, unmanned aerial vehicles and portable medical devices, thereby failing to meet the efficient use of space requirements of modern electronic devices. SUMMARY

[0003] The utility model aims at overcoming the prior art problems, and provides a compact structure potentiometer.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following scheme:

[0005] A compact structure potentiometer, comprising a rotating brush, a resistance sheet, a substrate, a lock plate cover and a clamping structure, wherein,

[0006] The substrate is provided with a resistance sheet attached to the upper end face of the substrate; the rotating brush is rotatably connected to the substrate; the resistance sheet has a resistance paint layer in electrical contact with the rotating brush and in the shape of a ring; the outer diameter of the resistance paint layer is 12-15mm; the thickness of the resistance sheet is 0.2-0.5mm;

[0007] The lock plate cover and the clamping structure are matched with the substrate and fixed on the substrate by the clamping structure to press and fix the resistance sheet on the substrate.

[0008] Further, the outer diameter of the resistance paint layer is 12.3-13.3mm; the thickness of the resistance sheet is 0.2mm.

[0009] Further, the locking structure comprises a clasp hook part and a clasp mouth part; the edge of the base plate is provided with a plurality of clasp mouth parts; the lock plate cover is provided with the same number of clasp hook parts as the clasp mouth parts and the positions of the clasp hook parts correspond to the positions of the clasp mouth parts.

[0010] When the lock plate cover is matched and covered on the base plate, the clasp hook part is buckled on the clasp mouth part.

[0011] Further, the resistance paint layer is a conductive silver paint layer; the surface of the rotating brush is coated with a silver paint coating.

[0012] Further, the rotating brush has a plurality of brush filaments which are separated at intervals; the contact part of the brush filament and the resistance paint layer is provided with a wrinkle part.

[0013] Further, the brush filament is arranged to be bent towards the resistance paint layer.

[0014] Further, the bottom surface of the base plate is provided with a clamping support column.

[0015] Further, the rotating brush is rotatably connected to the base plate through a rotating shaft sleeve.

[0016] Further, the center position of the base plate is provided with a rotating shaft hole; the top surface of the base plate is provided with a shaft sleeve groove which is opened downward and corresponds to the position of the rotating shaft hole; the lower end of the rotating shaft sleeve is provided with a positioning convex part which is matched with the shaft sleeve groove and can rotate along the groove wall of the shaft sleeve groove; the lock plate cover is provided with a shaft sleeve hole which can be passed through by the upper end of the rotating shaft sleeve and corresponds to the position of the rotating shaft hole.

[0017] Compared with the prior art, the utility model has the advantages of the following:

[0018] The utility model discloses a rotating brush, a resistance sheet, a base plate, a lock plate cover and a locking structure are combined, the resistance sheet is directly attached to the upper end surface of the base plate, and the resistance sheet is fixed in combination with the lock plate cover and the locking structure, the groove structure or the accommodating cavity for positioning the resistance sheet is reduced, the thickness of the resistance sheet and the outer diameter of the resistance paint layer are reasonably designed, and then the size of the rotating brush can be optimized and limited, the design guarantees the adjustment accuracy, realizes the miniaturization design of the structure, occupies small space, and is compact, is especially suitable for being installed in the internal electronic equipment of limited space, effectively improves the integration and portability of the equipment, and is better applied to various miniaturization and integration electronic equipment, such as smart watches, unmanned planes and portable medical equipment. BRIEF DESCRIPTION OF DRAWINGS

[0019] The application will be described in further detail below in combination with the drawings and specific embodiments.

[0020] Fig. 1It is the exploded perspective structural schematic diagram of the compact structure potentiometer.

[0021] Fig. 2 It is the perspective structural schematic diagram of the compact structure potentiometer.

[0022] The figure includes:

[0023] Rotary brush 1, brush wire 11, wrinkle part 111, resistance sheet 2, resistance paint layer 21, base plate 3, rotating shaft hole 31, shaft sleeve groove 32, lock plate cover 4, shaft sleeve hole 41, locking structure 5, clamping hook part 51, clamping mouth part 52, clamping embedding pillar 6, rotating shaft sleeve 7, positioning convex part 8. Specific implementation

[0024] The specific implementation of the utility model will be described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0025] As Figs. 1-2 shown, a compact structure potentiometer includes rotary brush 1, resistance sheet 2, base plate 3, lock plate cover 4 and locking structure 5, wherein the base plate 3 can be made of high-strength and high-insulation material, ensuring structural stability and electrical safety. The resistance sheet 2 is attached to the upper end face of the base plate 3; the rotary brush 1 is rotatably connected to the base plate 3; the resistance sheet 2 has a resistance paint layer 21 in electrical contact with the rotary brush 1 and in the shape of a ring; the outer diameter of the resistance paint layer 21 is 12-15mm, preferably 12.3-13.3mm, and specifically can be 12.3mm, 12.5mm or 13mm. The thickness of the resistance sheet 2 is 0.2-0.5mm, preferably 0.2mm. The lock plate cover 4 is matched with the base plate 3 and fixed on the base plate 3 by the locking structure 5 to press and fix the resistance sheet 2 on the base plate 3. The lock plate cover 4 serves as the external protective shell of the potentiometer, is matched with the base plate 3 in shape, and is fixed on the base plate 3 by the unique locking structure 5. Specifically, the locking structure 5 includes clamping hook part 51 and clamping mouth part 52; the base plate 3 is provided with a plurality of clamping mouth parts 52 along the edge; the lock plate cover 4 is provided with the same number of clamping hook parts 51 as the clamping mouth parts 52 and corresponding to the positions of the clamping mouth parts 52; when the lock plate cover 4 is matched and covered on the base plate 3, the clamping hook parts 51 are buckled on the clamping mouth parts 52. This design of the locking structure 5 not only facilitates installation and removal, but also effectively presses and fixes the resistance sheet 2 on the base plate 3, preventing loosening or falling off, and further improving the overall stability and reliability of the potentiometer.

[0026] The compact structure potentiometer is combined by the rotary brush 1, the resistance sheet 2, the substrate 3, the lock plate cover 4 and the locking structure 5, the resistance sheet 2 is directly attached on the upper end face of the substrate 3, and the resistance sheet 2 is fixed in combination with the lock plate cover 4 and the locking structure 5, the groove structure or the accommodating cavity design for positioning the resistance sheet 2 is reduced, and the thickness of the resistance sheet 2 and the outer diameter of the resistance paint layer 21 are reasonably designed, and then the size of the rotary brush 1 can be optimized, the design can guarantee the adjustment accuracy, realize the small size design of the structure, occupy small space, and the structure is compact, and the compact structure potentiometer is especially suitable for being installed in the internal space of electronic equipment, effectively improves the integration and portability of the equipment, and is better applied to various miniaturization and integration electronic equipment, such as smart watches, unmanned aerial vehicles, portable medical equipment and the like.

[0027] In order to improve the good conductivity between the resistance sheet 2 and the rotary brush 1, the resistance paint layer 21 is a conductive silver paint layer, and the surface of the rotary brush 1 is coated with a silver paint coating. The design of the resistance sheet 2 and the rotary brush 1 improves the conductivity of the two, thereby improving the overall conductivity of the potentiometer, and better applying to various miniaturization and integration electronic equipment, such as smart watches, unmanned aerial vehicles, portable medical equipment and the like.

[0028] Preferably, the rotary brush 1 has a plurality of brush filaments 11 which are spaced apart; and the contact between the brush filaments 11 and the resistance paint layer 21 is provided with a wrinkle part 111. By designing the wrinkle part 111 on the brush filaments 11, better electrical contact with the resistance paint layer 21 is achieved, and good conductivity is achieved.

[0029] In order to further ensure the conductivity between the brush filaments 11 and the resistance paint layer 21 is better, the brush filaments 11 are bent towards the resistance paint layer 21.

[0030] In the embodiment, the rotary brush 1 is rotatably connected to the substrate 3 through a shaft sleeve 7. Specifically, a shaft hole 31 is arranged at the center of the substrate 3; a shaft sleeve groove 32 is arranged on the top surface of the substrate 3 and faces downward; the lower end of the shaft sleeve 7 is provided with a positioning convex part 8 which is matched with the shaft sleeve groove 32 and can rotate along the groove wall of the shaft sleeve groove 32; and the lock plate cover 4 is provided with a shaft sleeve hole 41 which is matched with the shaft sleeve 7. The positioning convex part 8 is arranged at the lower end of the shaft sleeve 7, and the positioning convex part 8 is arranged in the shaft sleeve groove 32, so that the stability of the rotatable connection between the rotary brush 1 and the substrate 3 is improved, and the rotary brush 1 is not easy to be loosened. At the same time, the shaft sleeve hole 41 is arranged on the lock plate cover 4, so that the lock plate cover 4 can well position the shaft sleeve 7, and the rotary brush 1 driven by the shaft sleeve 7 can rotate more stably and reliably on the substrate 3.

[0031] In order to better position and install the compact structure potentiometer as a whole, the bottom surface of the substrate 3 is provided with a clamping support 6. The clamping support 6 is matched and clamped with the mounting hole on the electronic equipment, so that the compact structure potentiometer is quickly and simply mounted on the electronic equipment, and the assembly efficiency is high.

[0032] In summary, the compact structure potentiometer provided by the embodiments of the present application comprises a rotating brush 1, a resistor sheet 2, a substrate 3, a lock plate cover 4 and a locking structure 5. The resistor sheet 2 is directly attached to the upper end surface of the substrate 3 and is fixed in combination with the lock plate cover 4 and the locking structure 5, thereby reducing the design of the groove structure or the accommodating cavity for positioning the resistor sheet 2, and reasonably designing the thickness of the resistor sheet 2 and the outer diameter of the resistive paint layer 21. In turn, the size of the rotating brush 1 can be optimized. The design ensures the adjustment accuracy and realizes the miniaturization design of the structure, occupies small space, and is compact in structure. The compact structure potentiometer is particularly suitable for installation in the internal space-limited electronic equipment, effectively improves the integration and portability of the equipment, and is better applied to various miniaturized and integrated electronic equipment, such as smart watches, unmanned aerial vehicles and portable medical equipment.

[0033] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, several improvements and replacements can be made without departing from the technical principles of the present application. These improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A compact structure potentiometer comprising a rotary brush and a resistance sheet; characterized in that, Also include: A substrate, the resistance sheet is attached to the upper end surface of the substrate; the rotating brush can be rotatably connected to the substrate; The resistance sheet has a resistance paint layer in electrical contact with the rotating brush and in the shape of a ring; the outer diameter of the resistance paint layer is 12-15mm; the thickness of the resistance sheet is 0.2-0.5mm; Lock plate cover, locking structure; the lock plate cover matches the substrate and is fixed on the substrate by the locking structure to press and fix the resistance sheet on the substrate.

2. A compact structure potentiometer according to claim 1, characterized in that, The outer diameter of the resistance paint layer is 12.3-13.3mm; the thickness of the resistance sheet is 0.2mm.

3. A compact structure potentiometer according to claim 1 or 2, characterized in that, The locking structure includes a hook portion and a socket portion; the edge of the substrate is provided with a plurality of socket portions; the lock plate cover is provided with a plurality of hook portions corresponding to the position of the socket portion and the number of socket portions is the same as the number of hook portions. When the lock plate cover is matched and covered on the substrate, the hook portion is buckled on the socket portion.

4. A compact structure potentiometer according to claim 1 or 2, characterized in that, The resistance paint layer is a conductive silver paint layer; the surface of the rotating brush is coated with a silver paint coating.

5. A compact structure potentiometer according to claim 1 or 2, characterized in that, The rotating brush has a plurality of brush wires separated by intervals; the contact between the brush wire and the resistance paint layer is provided with a wrinkle portion.

6. A compact structure potentiometer according to claim 5, characterized in that, The brush wire is bent towards the resistance paint layer.

7. The compact structure potentiometer according to claim 1, characterized in that, The bottom surface of the substrate is provided with a card-embedded support.

8. The compact structure potentiometer according to claim 1, characterized in that, The rotating brush is rotatably connected to the substrate through a shaft sleeve.

9. A compact structure potentiometer according to claim 8, characterized in that, The center of the substrate is provided with a shaft hole; the top surface of the substrate is provided with a shaft sleeve groove facing downward corresponding to the position of the shaft hole; the lower end of the shaft sleeve is provided with a positioning convex portion which is matched with the shaft sleeve groove and can rotate along the groove wall of the shaft sleeve groove; the lock plate cover is provided with a shaft sleeve hole corresponding to the position of the shaft hole, which can be passed through the upper end of the shaft sleeve.

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