CN114783708A

CN114783708A - Potentiometer

Info

Publication number: CN114783708A
Application number: CN202210309167.0A
Authority: CN
Inventors: 蒋明义
Original assignee: Ningbo Huayu Electronic Co ltd
Current assignee: Ningbo Huayu Electronic Co ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-07-22

Abstract

The application discloses potentiometre, including base plate, adjusting part and brush, adjusting part a side seted up the mounting groove, set up the mounting groove on adjusting part and be used for installing the brush. The mounting groove is internally provided with at least one positioning column, the electric brush is sleeved outside the positioning column, and the electric brush can be quickly positioned through the positioning column, so that the electric brush and the adjusting assembly are assembled. The positioning column is riveted with the electric brush, and the electric brush partially extends out of the mounting groove to be contacted with the substrate. Compare in the mounting means of traditional joint, the riveting scheme that this application adopted is operated more simply. And riveting is completed by an automatic machine, so that the processing efficiency of the product is effectively improved.

Description

Potentiometer

Technical Field

The application relates to the technical field of potentiometers, in particular to a glass glaze potentiometer.

Background

The potentiometer is a resistance element which is provided with three leading-out terminals and the resistance value of which can be adjusted according to a certain change rule. Potentiometers are generally composed of a resistive body and a movable brush. When the brush moves along the resistor body, a resistance value or a voltage having a certain relation with the displacement amount is obtained at the output terminal. The potentiometer can be used as a three-terminal device or a two-terminal device. The latter can be regarded as a variable resistor, and is called a potentiometer because its role in the circuit is to obtain an output voltage in relation to the input voltage (applied voltage).

The glass glaze potentiometer is an adjustable electronic element using glass glaze as a resistance material and consists of a glass glaze resistor body and a rotating or sliding system. When a voltage is applied between two fixed contacts of the resistor body, the position of the contact on the resistor body is changed through a rotating or sliding system, and a voltage which has a certain relation with the position of the moving contact can be obtained between the moving contact and the fixed contact. The glass glaze potentiometer is a small potentiometer, is mostly square in shape, is a few round in shape, and generally has the shape size of not more than 10mm multiplied by 5 mm.

Therefore, the volume structure of the glass glaze potentiometer is limited, the used substrate is thin and fragile, the pins can be connected on the substrate only by adopting a welding process, the process cannot be completed by mechanical automation in the production field of the glass glaze potentiometer, manual welding is adopted at present, and the production efficiency of the glass glaze is low and the production cost is high.

In addition, the brush structure in the glass glaze potentiometer is smaller, so that the installation mode between the brush and the adjusting component is limited. It is currently used to snap the brushes onto the adjustment assembly. And because the electric brush structure is very small, the clamping difficulty of mechanical automatic clamping is high, the process is also manually completed in the existing production and processing, and the working efficiency is low.

Disclosure of Invention

An object of this application is to provide a potentiometre, improves the structure of glass glaze potentiometre for it can reduce the cost of labor in the production course of working, reduction in production cost.

The technical scheme adopted by the application is as follows: a potentiometer comprises a substrate, an adjusting component and an electric brush, wherein the substrate is made of glass fiber, a plurality of pins are mounted on the substrate, and the pins are riveted with the substrate; the adjusting component is provided with at least one positioning column, the electric brush is sleeved outside the positioning column, the positioning column is riveted with the electric brush, and the electric brush is contacted with the substrate.

Compared with the prior art, the advantage of this application lies in, at first adopts the glass fiber board to process and obtains the base plate, compares the glass glaze among the prior art, and the base plate of this application can bear the pressure that riveting technology brought. Therefore, the manual work can be reduced in the production and processing process of the potentiometer, and mechanical equipment is adopted for riveting, so that the production cost is reduced. Secondly, this application sets up the reference column on adjusting part, and the brush cover is established outside the reference column. The electric brush can be quickly positioned through the positioning column, and the electric brush and the adjusting component are assembled. Then, riveting of the electric brush and the positioning column is achieved through pressure riveting of the positioning column, and connection of the electric brush and the adjusting assembly is achieved. Compare in the mounting means of traditional joint, the riveting scheme that this application adopted is operated more simply. And riveting is completed by an automatic machine, so that the processing efficiency of the product is effectively improved.

In some embodiments of the present application, the substrate surface is brushed with a conductive layer. In the actual production process, the difficulty of brushing the conductive layer on the glass fiber board is low, and the production cost is not high. And brushing the conductive layer helps to improve the performance of the potentiometer.

In some embodiments of the present application, the substrate with the conductive layer has a temperature coefficient of resistance of ±)

500-1000 ppm/DEG C. The resistance temperature coefficient of the potentiometer of the prior glass glaze is +/-100-. The temperature coefficient of resistance of the potentiometer is adjusted to be 500-1000 ppm/DEG C by adopting the glass fiber board and the conductive layer. In this state, the technical parameters of the potentiometer are slightly inferior to those of the conventional glass glaze potentiometer, but the overall production cost is reduced by about 50%.

In some embodiments of the present application, the pins are stamped and formed into the rivet posts. The riveting post be different from the riveting post among the prior art for solid cylinder, this application adopts directly punching press on the pin, the riveting post of this application is hollow cylindric structure. This application adopts and stretches out the base plate end to the riveting post and do the reaming processing for the riveting post tip turns over the card outwards at the base plate surface, realizes pin and base plate riveting.

In some embodiments of the application, a mounting groove is formed in one side surface of the adjusting component, and the positioning column is arranged in the mounting groove.

In some embodiments of the present application, the brush includes a mounting plate and a brush body, the mounting plate is mounted in a mounting groove, and the mounting groove is configured to accommodate the structure of the mounting plate.

In this application, the structure through setting up the mounting groove suits with the mounting plate structure, can play good limiting displacement to the mounting panel. In the working process of the potentiometer, the electric brush can always keep a stable connection relation with the adjusting assembly.

In some embodiments of the present application, the adjusting assembly includes a rotating disc, the mounting groove is disposed on the rotating disc, and a cross section of the mounting groove has a substantially L-shaped cross section.

Specifically, the mounting groove is arranged around the periphery of a central shaft of the turntable. This application adopts above-mentioned mounting groove structure, can effectively increase mounting groove area, has just also increased the installation controlling part of brush, improves the stability of assembly.

In some embodiments of the present application, the mounting plate has an L-shape, the mounting plate includes a first section and a second section, the first section is riveted to the positioning pillar, and the brush body is connected to the second section.

In some embodiments of the present application, two positioning pillars are disposed in the mounting groove. For the preferred scheme of this application, when the brush suit was on the reference column, two reference columns can be spacing with the brush, also be convenient for the brush follow-up installation in the mounting groove.

In some embodiments of the present application, the brush includes two brush bodies spaced apart from each other on the mounting 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 pins are correspondingly provided with convex columns, the convex columns penetrate through the mounting hole, and the convex columns are riveted with the mounting hole.

In some embodiments of the present application, the brush is a unitary structural member. I.e. the brush has a high structural strength.

In some embodiments of the present application, the adjusting assembly includes a screw, the outer peripheral surface of the rotating disc is provided with gear teeth, and the screw is engaged with the rotating disc. The rotation of the screw rod drives the rotating disc to rotate, and the rotating disc drives the electric brush to move.

In some embodiments of the present application, the present application further comprises a housing, the dial is mounted in the housing, and the adjustment end of the screw extends out of the housing. The user rotates the screw rod through the regulation end of operation screw rod, and then drives the brush motion, changes the resistance value or the voltage of pin end.

In some embodiments of the present application, the screw comprises a threaded section and connecting sections disposed at both ends of the threaded section, the surface of the connecting sections is provided with at least one circle of textures, the cross section of the textures is in a triangular structure, and the textures are in line contact with the wall of the shell. This application has realized being connected of screw rod and casing through the setting of texture for the screw rod can not drop from the casing. The installation of screw rod among the prior art is through setting up structures such as jump ring. The application reduces parts and simplifies assembly steps. In addition, prior art's jump ring all to the one end of installing at the screw rod, this application sets up the linkage segment through the both ends at the screw thread section, can make the installation of screw rod more reliable and more stable.

In some embodiments of the present application, the screws are disposed parallel or perpendicular to the pins.

Drawings

The present application will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the present application. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a schematic structural diagram of the present application;

FIG. 2 is a schematic view of a backside structure of the present application;

FIG. 3 is a first exemplary diagram illustrating an internal structure of the present application;

FIG. 4 is a second schematic diagram of the internal structure of the present application;

FIG. 5 is a schematic view of the construction of the mounting groove portion of the present application;

FIG. 6 is an exploded view of FIG. 5;

FIG. 7 is a cross-sectional view of the present application;

FIG. 8 is an enlarged view of a portion of FIG. 7 at A;

FIG. 9 is an enlarged view of a portion of FIG. 7 at B;

fig. 10 is a cross-sectional view of section CC in fig. 2.

Wherein the reference numerals are specified as follows: 1. a substrate; 2. an electric brush; 2a, mounting plates; 2b, a brush body; 3. mounting grooves; 4. a positioning column; 5. a pin; 5a, riveting columns; 6. a turntable; 7. a screw; 7a, a threaded section; 7b, a connecting section; 8. a housing; 9. a limiting bulge; 10. a limiting groove.

Detailed Description

The present application will now be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

An embodiment of a potentiometer is shown in fig. 1 and 5: the glass fiber reinforced plastic composite material brush comprises a substrate 1, an adjusting assembly and an electric brush 2, wherein the substrate 1 is made of glass fiber materials, a plurality of pins 5 are mounted on the substrate 1, and the pins 5 are riveted with the substrate 1; specifically, the substrate 1 is provided with a mounting hole, the pin 5 is correspondingly provided with a convex column, the convex column penetrates through the mounting hole, and the convex column is riveted with the mounting hole.

The adjusting component in be provided with at least one

reference column

4, 2 covers of brush establish outside reference column 4, can fix a position brush 2 fast through reference column 4, realize brush 2 and adjusting component's assembly. The positioning column 4 is riveted with the electric brush 2, and the electric brush 2 is contacted with the substrate 1. Compare in the mounting means of traditional joint, the riveting scheme that this application adopted is operated simplyr. And riveting is completed by an automatic machine, so that the processing efficiency of the product is effectively improved.

As shown in fig. 10, the pin 5 is stamped and formed with a rivet post 5 a. Riveting post 5a be different from the riveting post 5a among the prior art for solid cylinder, this application adopts directly punching press on pin 5, the riveting post 5a of this application is hollow cylindric structure. This application adopts and stretches out 1 end of base plate to riveting post 5a and do the reaming processing for riveting post 5a tip turns over the card outwards at 1 surface of base plate, realizes that pin 5 and base plate 1 rivet.

The surface of the substrate 1 is brushed with a conductive layer. In the actual production process, the difficulty of brushing the conductive layer on the glass fiber board is low, and the production cost is not high. And the brushing of the conductive layer helps to improve the performance of the potentiometer.

The temperature coefficient of resistance of the substrate 1 with the conductive layer is + -500-1000 ppm/DEG C. The current potentiometer resistance temperature coefficient of the glass glaze is +/-100-250 ppm/DEG C. The application adopts the glass fiber board to match with the conductive layer to adjust the resistance temperature coefficient of the potentiometer to 500-1000 ppm/DEG C. In this state, the technical parameters of the potentiometer are slightly inferior to those of the conventional glass glaze potentiometer, but the overall production cost is reduced by about 50%.

Example two: as shown in fig. 5 and 6, a mounting groove 3 is formed in one side surface of the adjusting assembly, and the mounting groove 3 is formed in the adjusting assembly and used for mounting the brush 2. The positioning column 4 is positioned in the mounting groove 3.

Brush 2 include mounting panel 2a and brush body 2b, mounting panel 2a install in mounting groove 3, mounting groove 3's structure and mounting panel 2a structure suit.

In this application, structure through setting up mounting groove 3 suits with mounting panel 2a structure, can play good limiting displacement to mounting panel 2 a. During the working process of the potentiometer, the electric brush 2 can be always stably connected with the adjusting component.

The adjusting component comprises a rotary disc 6, the mounting groove 3 is arranged on the rotary disc 6, and the section of the mounting groove 3 is basically L-shaped.

Specifically, the mounting groove 3 is provided around the outer periphery of the center axis of the turntable 6. This application adopts above-mentioned mounting groove 3 structure, can effectively increase the 3 areas of mounting groove, has just also increased brush 2's installation controlling part, improves the stability of assembly.

Two positioning columns 4 are arranged in the mounting groove 3. For the preferred scheme of this application, when brush 2 suit was on reference column 4, two reference columns 4 can be spacing with brush 2, also be convenient for brush 2 follow-up installation in mounting groove 3.

The rest of the second embodiment is the same as the first embodiment.

Example three: as shown in fig. 5 and 6, the brush 2 includes 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 2 a.

The basic shape of the mounting plate 2a is L-shaped, 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.

The electric brush 2 comprises two brush bodies 2b, and the two brush bodies 2b are arranged on the mounting plate 2a at intervals. The reliability of two brush bodies 2b arranged at an interval is higher compared to a single brush body 2 b.

The brush 2 is an integral structure. I.e. the brush 2 has a high structural strength.

The rest of the third embodiment is the same as the first or second embodiment.

Example four: the adjusting assembly comprises a rotating disc 6.

The adjusting component comprises a screw rod 7, gear teeth are arranged on the peripheral surface of the rotary table 6, and the screw rod 7 is meshed with the rotary table 6. The rotation of the screw 7 drives the rotation of the turntable 6, and the rotation of the turntable 6 drives the electric brush 2 to move.

As shown in fig. 3 and 4, the screw 7 is disposed parallel or perpendicular to the pin 5.

The rest of the fourth embodiment is the same as any of the above embodiments.

Example five: as shown in fig. 1 and 2, the present application further comprises a housing 8, the rotating disc 6 is mounted in the housing 8, and the adjusting end of the screw 7 extends out of the housing 8. The user rotates the screw 7 by operating the adjusting end of the screw 7, and then drives the electric brush 2 to move, and changes the resistance value or the voltage of the pin 5 end.

As shown in fig. 7 to 9, the screw 7 includes a threaded section 7a and connecting sections 7b disposed at both ends of the threaded section 7a, the surface of the connecting section 7b is provided with at least one circle of texture, the cross section of the texture is in a triangular structure, and the texture is in line contact with the wall surface of the housing 8. This application has realized being connected of screw rod 7 and casing 8 through the setting of texture for screw rod 7 can not drop from casing 8. Screw rod 7's installation is through setting up structures such as jump ring among the prior art. The application reduces parts and simplifies assembly steps. In addition, prior art's jump ring all is to installing the one end at screw rod 7, and this application can make screw rod 7's installation more reliable and stable through setting up linkage segment 7b at the both ends of screw section 7 a.

As shown in fig. 7, a limiting protrusion 9 is disposed on an inner wall surface of the housing 8, a limiting groove 10 is disposed on a surface of the turntable 6, the limiting protrusion 9 is embedded in the limiting groove 10, and the limiting protrusion 9 moves in the limiting groove 10 when the turntable 6 rotates. Specifically, the cross section of the limiting groove 10 is an open circular structure, that is, the movement of the limiting protrusion 9 in the limiting groove 10 has two movement limits, which limits the movement stroke of the limiting protrusion 9, and also limits the rotation angle (less than or equal to 330 °) of the turntable 6.

The rest of the fifth embodiment is the same as any of the above-described embodiments.

The present application has been described in detail above, and specific examples thereof are used herein to explain the principles and implementations of the present application, which are presented solely to aid in understanding the present application and its core concepts. It should be noted that, for those skilled in the art, without departing from the principle of the present application, the present application can also make several improvements and modifications, and those improvements and modifications also fall into the protection scope of the claims of the present application.

Claims

1. A potentiometer is characterized by comprising a substrate, an adjusting component and an electric brush, wherein the substrate is made of glass fiber materials, a plurality of pins are mounted on the substrate, and the pins are riveted with the substrate; the adjusting component is provided with at least one positioning column, the electric brush is sleeved outside the positioning column, the positioning column is riveted with the electric brush, and the electric brush is contacted with the substrate.

2. A potentiometer according to claim 1, wherein the substrate is coated with a conductive layer; the temperature coefficient of resistance of the substrate with the conductive layer is +/-500-1000 ppm/DEG C.

3. A potentiometer according to claim 1, wherein the brush comprises a mounting plate and a brush body, the mounting plate is mounted in a mounting slot, and the mounting slot is configured to fit the mounting plate.

4. A potentiometer according to claim 3, characterized in that the adjusting assembly comprises a rotary plate, the mounting groove is arranged on the rotary plate, and the section of the mounting groove is substantially L-shaped.

5. A potentiometer according to claim 3 or 4, wherein the mounting plate is generally L-shaped and comprises a first section and a second section, the first section is riveted to the locating stud, and the brush body is connected to the second section.

6. A potentiometer according to claim 4, characterized in that two positioning posts are arranged in the mounting groove; the electric brush comprises two brush bodies which are arranged on the mounting plate at intervals.

7. A potentiometer according to claim 4, wherein the adjusting assembly comprises a screw, the outer periphery of the rotary plate is provided with gear teeth, and the screw is engaged with the rotary plate.

8. A potentiometer according to claim 7, further comprising a housing, wherein the rotary plate is mounted in the housing and the adjustment end of the threaded rod extends out of the housing; the screw rod is arranged in parallel or vertical to the pin; the screw comprises a threaded section and connecting sections arranged at two ends of the threaded section, at least one circle of texture is arranged on the surface of each connecting section, the cross section of each texture is of a triangular structure, and the textures are in line contact with the wall of a shell.

9. A potentiometer according to claim 8, characterized in that the inner wall of the housing is provided with a limiting protrusion, the surface of the rotary plate is provided with a limiting groove, the limiting protrusion is embedded into the limiting groove, and the rotation of the rotary plate causes the limiting protrusion to move in the limiting groove.

10. A potentiometer according to claim 1, wherein the substrate has a mounting hole, the pins have a corresponding protrusion, the protrusion passes through the mounting hole, and the protrusion is riveted with the mounting hole.