A potentiometer

Abstract

The application discloses a potentiometer, which comprises a base plate, an adjusting assembly and a brush, and an installation groove is formed in one side of the adjusting assembly, and the installation groove is used for installing the brush. At least one positioning column is arranged in the installation groove, and the brush is sleeved outside the positioning column, the brush can be quickly positioned through the positioning column, and the assembly of the brush and the adjusting assembly is realized. The positioning column is riveted with the brush, and the brush partially extends out of the installation groove and contacts the base plate. Compared with a traditional clamping installation mode, the riveting scheme is simpler to operate. Moreover, riveting is completed by an automatic machine, and the machining efficiency of products is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of potentiometer, in particular to a glass enamel potentiometer. BACKGROUND

[0002] A potentiometer is a resistance element with three terminals, the resistance value of which can be adjusted according to a certain change rule. The potentiometer is usually composed of a resistance body and a movable brush. When the brush moves along the resistance body, the resistance value or voltage related to the displacement amount is obtained at the output terminal. The potentiometer can be used as a three-terminal element or a two-terminal element. The latter can be regarded as a variable resistor. Since its role in the circuit is to obtain an output voltage related to the input voltage (applied voltage), it is called a potentiometer.

[0003] The glass enamel potentiometer is a kind of adjustable electronic element using glass enamel as resistance material. It is composed of a glass enamel resistance body and a rotating or sliding system. When an external voltage is applied between the two fixed contacts of the resistance body, the position of the contact on the resistance body is changed through the rotating or sliding system, and a voltage related to the position of the moving contact can be obtained between the moving contact and the fixed contact. The glass enamel potentiometer is a small potentiometer, which is mostly square in shape and a few are round, and its outer dimensions are generally not more than 10mm x 10mm x 5mm.

[0004] Therefore, due to the limitation of the structure of the glass enamel potentiometer, the substrate used is thin and fragile, and the connection of the pins on the substrate can only be achieved by welding process. However, this process cannot be completed by mechanical automation in the production field of glass enamel potentiometers, and manual welding is currently used, which results in low production efficiency and high production cost of glass enamel.

[0005] In addition, the brush structure in the glass enamel potentiometer is smaller, which limits the installation method between the brush and the adjusting assembly. Currently, the brush is clamped on the adjusting assembly. Due to the very small structure of the brush, it is difficult to clamp mechanically, so this process is also completed manually in the current production and processing, which is low in efficiency. SUMMARY

[0006] An object of the present application is to provide a potentiometer, which improves the structure of the glass enamel potentiometer to reduce labor costs and production costs in the production and processing process.

[0007] The technical solution adopted by the present application is as follows: a potentiometer, comprising a substrate, an adjusting assembly and a brush, the substrate is made of glass fiber material, a plurality of pins are installed on the substrate, and the pins are riveted with the substrate; the adjusting assembly is provided with at least one positioning column, the brush is sleeved outside the positioning column, the positioning column is riveted with the brush, and the brush is in contact with the substrate.

[0008] Compared with existing technologies, the advantages of this application are as follows: First, it uses fiberglass board to process the substrate, which, compared to the glass enamel used in existing technologies, can withstand the pressure of the riveting process. Therefore, manual labor can be reduced in the potentiometer manufacturing process, and mechanical equipment can be used for riveting, thus reducing production costs. Second, this application sets positioning posts on the adjustment component, with the brush sleeved on the positioning posts. The positioning posts enable quick positioning of the brush, achieving assembly of the brush and the adjustment component. Then, the brush and positioning posts are riveted together by pressing, thus connecting the brush and the adjustment component. Compared with the traditional snap-fit ​​installation method, the riveting scheme adopted in this application is simpler to operate. Moreover, the riveting is completed by automated machinery, effectively improving product processing efficiency.

[0009] In some embodiments of this application, a conductive layer is brushed onto the surface of the substrate. In actual manufacturing processes, brushing a conductive layer onto a fiberglass board is relatively easy and inexpensive. Furthermore, brushing on a conductive layer helps improve the performance of the potentiometer.

[0010] In some embodiments of this application, the temperature coefficient of resistance of the substrate with the conductive layer is ±

[0011] 500-1000ppm / ℃. The temperature coefficient of resistance (TCR) of existing glass enamel potentiometers is ±100-250ppm / ℃. This application uses a glass fiber board in conjunction with a conductive layer to adjust the TCR of the potentiometer to 500-1000ppm / ℃. Under these conditions, the technical parameters of the potentiometer in this application will be slightly inferior to those of existing glass enamel potentiometers, but its overall production cost is reduced by approximately 50%.

[0012] In some embodiments of this application, the pin is stamped to form the riveting post. Unlike the solid cylinders in the prior art, the riveting post in this application is directly stamped onto the pin, making it a hollow cylindrical structure. This application uses a method of enlarging the end of the riveting post extending from the substrate, causing the end of the riveting post to fold outwards and lock onto the outer surface of the substrate, thus achieving the riveting of the pin to the substrate.

[0013] In some embodiments of this application, the adjustment component has a mounting groove on one side, and the positioning post is disposed in the mounting groove.

[0014] In some embodiments of this application, the brush includes a mounting plate and a brush body, the mounting plate is installed in a mounting groove, and the structure of the mounting groove is adapted to the structure of the mounting plate.

[0015] In the application, the installation groove structure is adapted to the installation plate structure, so that the installation plate can be well limited. In the working process of the potentiometer, the brush can always be stably connected with the adjusting assembly.

[0016] In some embodiments of the application, the adjusting assembly comprises a rotating disc, the installation groove is arranged on the rotating disc, and the cross section of the installation groove is substantially L-shaped.

[0017] Specifically, the installation groove is arranged around the outer periphery of the central axis of the rotating disc. The installation groove structure can effectively increase the area of the installation groove, so that the installation control of the brush is increased, and the assembly stability is improved.

[0018] In some embodiments of the application, the installation plate is substantially L-shaped, and comprises a first segment and a second segment, the first segment is riveted with the positioning column, and the brush body is connected with the second segment.

[0019] In some embodiments of the application, two positioning columns are arranged in the installation groove. It is a preferred scheme of the application that when the brush is sleeved on the positioning column, the two positioning columns can limit the brush, and the brush is convenient to be subsequently installed in the installation groove.

[0020] In some embodiments of the application, the brush comprises two brush bodies, and the two brush bodies are arranged at intervals on the installation plate. Compared with a single brush body, the reliability of the two brush bodies arranged at intervals is higher. The base plate is provided with a mounting hole, the pin is provided with a protruding column corresponding to the mounting hole, the protruding column passes through the mounting hole, and the protruding column is riveted with the mounting hole.

[0021] In some embodiments of the application, the brush is a whole structure. That is, the brush has high structural strength.

[0022] In some embodiments of the application, the adjusting assembly comprises a screw rod, the outer periphery of the rotating disc is provided with a gear, and the screw rod is engaged with the rotating disc. The rotation of the screw rod drives the rotation of the rotating disc, and the rotating disc drives the movement of the brush.

[0023] In some embodiments of the application, the application further comprises a housing, the rotating disc is installed in the housing, and the adjusting end of the screw rod extends out of the housing. The user rotates the screw rod by operating the adjusting end of the screw rod, so as to drive the movement of the brush and change the resistance value or voltage of the pin end.

[0024] In some embodiments of the present application, the screw rod comprises a threaded segment and connecting segments arranged at both ends of the threaded segment, the connecting segments are provided with at least one circle of textures, the cross section of the textures is in a triangular structure, and the textures are in linear contact with the shell wall. The present application realizes the connection between the screw rod and the shell by arranging the textures, so that the screw rod cannot fall off the shell. In the prior art, the screw rod is installed by arranging a snap spring and the like. The present application reduces the parts and simplifies the assembly steps. In addition, the snap spring in the prior art is installed at one end of the screw rod, and the present application can make the installation of the screw rod more stable and reliable by arranging the connecting segments at both ends of the threaded segment.

[0025] In some embodiments of the present application, the screw rod is arranged parallel or perpendicular to the pin. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application will be further described in detail below in combination with the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present application. In addition, unless specifically indicated, the drawings only schematically show the composition or structure of the described objects and can contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0027] Figure 1 is a structural schematic diagram of the present application;

[0028] Figure 2 is a back structure schematic diagram of the present application;

[0029] Figure 3 is a schematic diagram of the internal structure of the present application Figure 1 ;

[0030] Figure 4 is a schematic diagram of the internal structure of the present application Figure 2 ;

[0031] Figure 5 is a structural schematic diagram of the mounting groove part of the present application;

[0032] Figure 6 is an exploded structural schematic diagram of Figure 5 ;

[0033] Figure 7 is a sectional view of the present application;

[0034] Figure 8 is a partial enlarged view of A in Figure 7 ;

[0035] Figure 9 is a partial enlarged view of B in Figure 7 ;

[0036] Figure 10 For Figure 2 A sectional view of a middle CC section.

[0037] Wherein, the reference signs are specifically explained as follows: 1, base plate; 2, brush; 2a, mounting plate; 2b, brush body; 3, mounting groove; 4, positioning column; 5, pin; 5a, riveting column; 6, rotating disc; 7, screw rod; 7a, threaded segment; 7b, connecting segment; 8, shell; 9, limiting protrusion; 10, limiting groove. DETAILED DESCRIPTION

[0038] The application will be described in detail below with reference to the drawings.

[0039] In order to make the purpose, technical scheme and advantages of the application more clear, the application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the application and not to limit the application.

[0040] A potentiometer, embodiment one is as shown in Figure 1 , Figure 5 : including base plate 1, adjustment assembly and brush 2, the base plate 1 adopts glass fiber material, the base plate 1 is installed with several pins 5, the pin 5 is riveted with the base plate 1; Specifically, the mounting hole is set up on the base plate 1, the convex column is set up on the pin 5 correspondingly, the convex column passes through the mounting hole, and the convex column is riveted with the mounting hole.

[0041] The adjustment assembly is provided with at least one positioning column 4, the brush 2 is sleeved outside the positioning column 4, the brush 2 can be quickly positioned through the positioning column 4, the assembly of the brush 2 and the adjustment assembly is realized. The positioning column 4 is riveted with the brush 2, and the brush 2 is in contact with the base plate 1. Compared with the traditional clamping mounting mode, the riveting scheme adopted by the application is more simple to operate. Moreover, the riveting is completed by automatic machinery, so that the processing efficiency of the product is effectively improved.

[0042] As shown in Figure 10 , the pin 5 is stamped into a riveting column 5a. The riveting column 5a is different from the solid cylindrical riveting column 5a in the prior art, and the riveting column 5a of the application is a hollow cylindrical structure. The end of the riveting column 5a extending out of the base plate 1 is treated by hole expansion, so that the end of the riveting column 5a is folded outward and clamped on the outer surface of the base plate 1, and the pin 5 is riveted with the base plate 1.

[0043] The surface of the base plate 1 is brushed with a conductive layer. In actual production process, it is low in difficulty and cost to brush the conductive layer on the glass fiber plate. Moreover, brushing the conductive layer helps to improve the performance of the potentiometer.

[0044] The resistance temperature coefficient of the substrate 1 with the conductive layer is ±500-1000ppm / ℃. The resistance temperature coefficient of the existing glass glaze potentiometer is ±100-250ppm / ℃. The glass fiber plate is used in combination with the conductive layer in the application, and the resistance temperature coefficient of the potentiometer is adjusted to 500-1000ppm / ℃. In this state, the technical parameters of the potentiometer of the application are slightly worse than those of the existing glass glaze potentiometer, but the overall production cost is reduced by about 50%.

[0045] Embodiment two: as shown in Figure 5 、 Figure 6 The adjusting assembly is provided with a mounting groove 3 on one side, and the mounting groove 3 is used for mounting the brush 2. The positioning column 4 is located in the mounting groove 3.

[0046] The brush 2 comprises a mounting plate 2a and a brush body 2b. The mounting plate 2a is mounted in the mounting groove 3, and the structure of the mounting groove 3 is adapted to the structure of the mounting plate 2a.

[0047] In the application, the structure of the mounting groove 3 is adapted to the structure of the mounting plate 2a, which can effectively limit the mounting plate 2a. During the working process of the potentiometer, the brush 2 can always maintain a stable connection relationship with the adjusting assembly.

[0048] The adjusting assembly comprises a rotating disc 6, and the mounting groove 3 is arranged on the rotating disc 6. The cross section of the mounting groove 3 is basically in the shape of L.

[0049] Specifically, the mounting groove 3 is arranged around the outer periphery of the center axis of the rotating disc 6. The application of the above mounting groove 3 structure can effectively increase the area of the mounting groove 3, thereby increasing the installation control of the brush 2 and improving the stability of assembly.

[0050] Two positioning columns 4 are arranged in the mounting groove 3. As a preferred scheme of the application, when the brush 2 is sleeved on the positioning column 4, the two positioning columns 4 can limit the brush 2, and the brush 2 is convenient to install in the mounting groove 3 subsequently.

[0051] The other contents of embodiment two are the same as those of embodiment one.

[0052] Embodiment three: as shown in Figure 5 、 Figure 6 The brush 2 comprises a mounting plate 2a and a brush body 2b. The mounting plate 2a is mounted in the mounting groove 3, and the structure of the mounting groove 3 is adapted to the structure of the mounting plate 2a.

[0053] The mounting plate 2a is basically in the shape of L, and the mounting plate 2a comprises a first section and a second section. The first section is riveted with the positioning column 4, and the brush body 2b is connected with the second section.

[0054] The brush 2 comprises two brush bodies 2b which are arranged at intervals on the mounting plate 2a. Compared with a single brush body 2b, the two brush bodies 2b arranged at intervals have higher reliability.

[0055] The brush 2 is a whole structural member. That is, the brush 2 has high structural strength.

[0056] The other contents of the third embodiment are the same as those of the first embodiment or the second embodiment.

[0057] The fourth embodiment: the adjusting assembly comprises a rotating disc 6.

[0058] The adjusting assembly comprises a screw rod 7, and the rotating disc 6 is provided with gear teeth on the outer circumferential surface, and the screw rod 7 is engaged with the rotating disc 6. The rotation of the screw rod 7 drives the rotating disc 6 to rotate, and the rotating rotating disc 6 drives the brush 2 to move.

[0059] As shown in Figure 3 , Figure 4 , the screw rod 7 is arranged in parallel or perpendicular to the pin 5.

[0060] The other contents of the fourth embodiment are the same as those of any one of the above embodiments.

[0061] The fifth embodiment: as shown in Figure 1 Figure 2 , the application further comprises a shell 8, the rotating disc 6 is arranged in the shell 8, and the adjusting end of the screw rod 7 extends out of the shell 8. A user rotates the screw rod 7 by operating the adjusting end of the screw rod 7, and then drives the brush 2 to move, so as to change the resistance value or voltage at the end of the pin 5.

[0062] As shown in Figures 7 to 9 , the screw rod 7 comprises a threaded segment 7a and connecting segments 7b arranged at both ends of the threaded segment 7a, the surface of the connecting segment 7b is provided with at least one circle of textures, the cross section of the texture is a triangular structure, and the texture is in linear contact with the wall surface of the shell 8. By arranging the texture, the application realizes the connection between the screw rod 7 and the shell 8, so that the screw rod 7 will not fall off from the shell 8. In the prior art, the screw rod 7 is installed by arranging a snap spring and the like. The application reduces the parts and simplifies the assembly steps. In addition, the snap spring in the prior art is installed at one end of the screw rod 7, and the application can make the installation of the screw rod 7 more stable and reliable by arranging the connecting segments 7b at both ends of the threaded segment 7a.

[0063] As shown in Figure 7As shown, the inner wall of the shell 8 is provided with a limiting protrusion 9, the surface of the rotating disc 6 is provided with a limiting groove 10, the limiting protrusion 9 is embedded into the limiting groove 10, and the rotating disc 6 rotates and the limiting protrusion 9 moves in the limiting groove 10. Specifically, the cross section of the limiting groove 10 is an open circular ring structure, i.e. the movement of the limiting protrusion 9 in the limiting groove 10 has two movement limits, which limits the moving stroke of the limiting protrusion 9 and the rotating angle of the rotating disc 6 (less than or equal to 330°).

[0064] The other contents of the fifth embodiment are the same as any of the above embodiments.

[0065] The above has carried on the detailed introduction to the application, the principle and implementation mode of the application are set forth by applying specific examples in this paper, the above embodiment is only for helping understanding the application and core idea. It should be pointed out that for ordinary skilled person in the art, without departing from the principle of the application, the application can be improved and modified, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims

1. A potentiometer, characterized by The utility model provides a brush, including substrate, adjusting assembly and brush, substrate adopts glass fiber material, a plurality of pins are installed on the substrate, and the pin is riveted with the substrate, the adjusting assembly is provided with at least one positioning column, the brush is sleeved outside the positioning column, and the positioning column is riveted with the brush, and the brush contacts the substrate, The substrate surface is brushed with a conductive layer; the resistance temperature coefficient of the substrate with the conductive layer is ±500-1000ppm / ℃; The brush includes a mounting plate and a brush body, the mounting plate is installed in a mounting groove, and the structure of the mounting groove is adapted to the structure of the mounting plate; The adjusting assembly includes a rotating disc, the mounting groove is arranged on the rotating disc, and the cross section of the mounting groove is substantially L-shaped; The mounting plate is substantially L-shaped, and the mounting plate includes a first segment and a second segment, the first segment is riveted with the positioning column, and the brush body is connected with the second segment; The adjusting assembly includes a screw rod, the outer circumferential surface of the rotating disc is provided with a gear, and the screw rod is engaged with the rotating disc; Further comprising a shell, the rotating disc is installed in the shell, and the adjusting end of the screw rod extends out of the shell; the screw rod is arranged in parallel or perpendicular to the pin; the screw rod includes a threaded segment and connecting segments arranged at both ends of the threaded segment, at least one circle of textures is arranged on the surface of the connecting segment, the cross section of the texture is triangular structure, and the texture is in line contact with the wall surface of the shell; The inner wall of the shell is provided with a limiting protrusion, the surface of the rotating disc is provided with a limiting groove, the limiting protrusion is embedded into the limiting groove, and the rotating of the rotating disc moves the limiting protrusion in the limiting groove. The substrate is provided with a mounting hole, the pin is provided with a convex column correspondingly, the convex column passes through the mounting hole, and the convex column is riveted with the mounting hole.

2. A potentiometer according to claim 1, characterised in that The mounting groove is provided with two positioning columns; the brush includes two brush bodies, and the two brush bodies are arranged on the mounting plate at intervals.

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