Forward pushing type linear sliding potentiometer

Abstract

The utility model discloses a forward push type linear sliding potentiometer, which comprises a base, a PCB (printed circuit board), a sliding piece and an upper cover, the upper cover is provided with a sliding groove, a handle part at the upper end of the sliding piece penetrates through the sliding groove and is exposed out of the upper cover, the left side and the right side of the upper cover are both provided with limiting edge parts, and the sliding piece is arranged between the two limiting edge parts of the upper cover in a sliding manner. A contact piece is fixedly arranged at the lower end of the sliding piece, and a carbon film matched with the contact piece is arranged on the upper surface of the PCB. The sliding piece can be limited through the limiting edge parts on the left side and the right side of the upper cover, the sliding piece can be conveniently pushed and pulled in the forward direction, the connecting plate parts on the front side and the rear side of the upper cover can be directly and fixedly connected with the base, the stability and the reliability of the potentiometer are guaranteed, the assembly cost can be greatly reduced, and the potentiometer is suitable for mass production.

Description

Technical Field

[0001] This utility model relates to a potentiometer, and more particularly to a positive push-type linear sliding potentiometer. Background Technology

[0002] A linear sliding potentiometer is an electronic component that adjusts resistance by sliding a slider in a straight line, and is widely used in industrial instruments and other fields. A linear sliding potentiometer allows for voltage division or adjustment of circuit parameters by manually pushing the slider to change the position of the contact point. Chinese patent CN2018102326615 discloses a sliding potentiometer, which includes an upper housing, a lower base, terminals, and a sliding push rod. The lower base is located below the upper housing, forming a cavity for accommodating the resistive element. The sliding push rod includes a connecting seat mounted on the slide and fastening tabs on both sides of the connecting seat. The fastening tabs are L-shaped pieces, with the two bent pieces respectively attached to the top and side of the upper housing. Rotatable fastening bolts are mounted on the fastening tabs on the side of the upper housing, with the rotating heads of the fastening bolts protruding from the outside of the fastening tabs. This sliding potentiometer adds an interface or access piece for securing the sliding push rod by setting L-shaped fastening fins on both sides of the sliding push rod and using fastening bolts. While this ensures the push rod is firmly in the desired sliding position and effectively improves the stability and reliability of the potentiometer, the fastening fins and bolts need to be manually fixed at the sliding push rod. This significantly increases the assembly cost during mass production. Therefore, we propose a positive push-type straight sliding potentiometer. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a positive push-type linear sliding potentiometer.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a positive push-type sliding potentiometer, comprising a base, a PCB board, a sliding component, and a top cover. The top cover has a sliding groove, and the handle portion at the upper end of the sliding component passes through the sliding groove and protrudes from the top cover. Limiting edges are provided on both the left and right sides of the top cover. The sliding component is slidably disposed between the two limiting edges of the top cover. A contact piece is fixedly disposed at the lower end of the sliding component, and a carbon film that cooperates with the contact piece is provided on the upper surface of the PCB board.

[0005] To further elaborate, the upper cover has connecting plate portions on both the front and rear sides, and the connecting plate portions have bent ears on both sides. The base has a groove portion that mates with the bent ears of the upper cover.

[0006] To further elaborate, both ends of the PCB board are connected to terminal components, which are embedded in the base and exposed from the base.

[0007] To further elaborate, the contact piece includes a connecting piece portion and a brush claw portion, the included angle between the connecting piece portion and the brush claw portion is an acute angle, the connecting piece portion is provided with a positioning hole, and the positioning pin portion of the sliding member passes through the positioning hole of the connecting piece portion of the contact piece.

[0008] To further elaborate, the positioning pin is located on the bottom rear side of the sliding member, the bottom front side of the sliding member is provided with a limiting protrusion, the contact piece is provided with a limiting groove that cooperates with the limiting protrusion, and the limiting groove is located between the two brush claws.

[0009] The beneficial effects of this utility model are as follows: the sliding parts can be limited by the limiting edges on the left and right sides of the top cover, which facilitates the forward pushing and pulling of the sliding parts. In addition, the connecting plates on the front and rear sides of the top cover can be directly fixedly connected to the base, which not only ensures the stability and reliability of the potentiometer, but also greatly reduces the assembly cost, making it suitable for mass production. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is an exploded view of the structure of this utility model.

[0012] Figure 3 This is an exploded view of the structure of this utility model.

[0013] Figure 4 This is a schematic diagram of the assembly of the sliding component and the contact piece.

[0014] Reference numerals: 10, base; 11, groove; 20, top cover; 21, sliding groove; 22, limiting edge; 23, connecting plate; 231, bent ear; 30, PCB board; 40, sliding component; 41, handle; 42, positioning pin; 43, limiting protrusion; 50, contact piece; 51, connecting piece; 511, positioning hole; 512, limiting slot; 52, brush claw; 60, terminal piece. Detailed Implementation

[0015] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0016] Combined with appendix Figure 1 and attached Figure 2As shown, a positive push-type linear potentiometer includes a base 10, a top cover 20, a PCB board 30, and a sliding member 40. The top cover 20 has a sliding groove 21. The handle portion 41 at the upper end of the sliding member 40 passes through the sliding groove 21 and protrudes from the top cover 20. Limiting edges 22 are provided on both the left and right sides of the top cover 20. When the top cover 20 is installed on the base 10, the limiting edges 22 of the top cover 20 contact the side wall of the base 10. The width of the sliding member 40 does not exceed the width of the base 10. The limiting edges 22 on both sides are symmetrically arranged on the top cover 20, thereby ensuring that the sliding member 40 is located in the center of the base 10. The sliding path of the sliding member 40 is along the center line of the base 10.

[0017] Specifically, the top cover 20 has connecting plate portions 23 on both the front and rear sides, and bending ears 231 on both sides of the connecting plate portions 23. The base 10 has a groove portion 11 that mates with the bending ears 231 of the top cover 20. The top cover 20 is a metal sheet, which can be bent downwards by a stamping process. The bending ears 231 of the connecting plate portions 23 are then bent laterally, so that the bending ears 231 can be inserted into the groove portion 11 of the base 10. When the handle portion 41 at the upper end of the sliding member 40 is pushed or pulled, the handle portion 41 can be stably fixed in the desired sliding position, effectively improving the stability and reliability of the potentiometer. Compared with the prior art, this utility model adopts a special structural design of the top cover 20. The limiting edges 22 on the left and right sides of the top cover 20 can limit the sliding part 40, and the connecting plates 23 on the front and rear sides of the top cover 20 can be directly fixedly connected to the base 10. This not only ensures the stability and reliability of the potentiometer, but also greatly reduces the assembly cost, making it suitable for mass production.

[0018] Combined with appendix Figure 2 To be continued Figure 4 As shown, the sliding member 40 is slidably disposed between the two limiting edges 22 of the upper cover 20. A contact piece 50 is fixedly disposed at the lower end of the sliding member 40, and a carbon film that mates with the contact piece 50 is disposed on the upper surface of the PCB board 30. Terminal pieces 60 are connected to both ends of the PCB board 30. The terminal pieces 60 are embedded in the base 10 and protrude from the base 10.

[0019] Combined with appendix Figure 3 and attached Figure 4 As shown, the contact piece 50 includes a connecting piece portion 51 and a brush claw portion 52. The included angle between the connecting piece portion 51 and the brush claw portion 52 is an acute angle. The connecting piece portion 51 has a positioning hole 511, and the positioning pin portion 42 of the sliding member 40 passes through the positioning hole 511 of the connecting piece portion 51 of the contact piece 50.

[0020] The positioning pin 42 is located on the bottom rear side of the sliding member 40. The bottom front side of the sliding member 40 is provided with a limiting protrusion 43. The contact piece 50 is provided with a limiting groove 512 that cooperates with the limiting protrusion 43. The limiting groove 512 is located between the two brush claws 52.

[0021] With the cooperation of the positioning pin 42 and the limiting protrusion 43 of the sliding member 40, the contact piece 50 can be accurately installed below the sliding member 40. When the handle 41 at the upper end of the sliding member 40 is pushed or pulled, the sliding member 40 can simultaneously drive the contact piece 50 to slide on the carbon film on the upper surface of the PCB board 30, making the sliding smoother and improving the feel of the potentiometer.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be called "second" information, and similarly, "second" information can also be called "first" information.

[0024] The above description does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the technical scope of this utility model.

Claims

1. A positive push-type linear sliding potentiometer, characterized in that: The device includes a base (10), a top cover (20), a PCB board (30), and a sliding member (40). The top cover (20) has a sliding groove (21). The handle (41) at the upper end of the sliding member (40) passes through the sliding groove (21) and protrudes from the top cover (20). The top cover (20) has limiting edges (22) on both the left and right sides. The sliding member (40) is slidably disposed between the two limiting edges (22) of the top cover (20). A contact piece (50) is fixedly disposed at the lower end of the sliding member (40). The upper surface of the PCB board (30) is provided with a carbon film that cooperates with the contact piece (50).

2. A positive push-type linear sliding potentiometer according to claim 1, characterized in that: The upper cover (20) has connecting plate portions (23) on both the front and rear sides, and the connecting plate portions (23) have bent ears (231) on both sides. The base (10) has a groove portion (11) that cooperates with the bent ears (231) of the upper cover (20).

3. A positive push-type linear sliding potentiometer according to claim 1, characterized in that: Both ends of the PCB board (30) are connected to terminal pieces (60), which are embedded in the base (10) and exposed from the base (10).

4. A positive push-type linear sliding potentiometer according to claim 1, characterized in that: The contact piece (50) includes a connecting piece portion (51) and a brush claw portion (52). The included angle between the connecting piece portion (51) and the brush claw portion (52) is an acute angle. The connecting piece portion (51) has a positioning hole (511). The positioning pin portion (42) of the sliding member (40) passes through the positioning hole (511) of the connecting piece portion (51) of the contact piece (50).

5. A positive push-type linear sliding potentiometer according to claim 4, characterized in that: The positioning pin (42) is located on the bottom rear side of the sliding member (40), and the bottom front side of the sliding member (40) is provided with a limiting protrusion (43). The contact piece (50) is provided with a limiting slot (512) that cooperates with the limiting protrusion (43). The limiting slot (512) is located between the two brush claws (52).

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