CN211858300U

CN211858300U - Sliding potentiometer with long service life

Info

Publication number: CN211858300U
Application number: CN202020684117.7U
Authority: CN
Inventors: 刘晟睿
Original assignee: Favor Electronics Dongguan Co ltd
Current assignee: Favor Electronics Dongguan Co ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-11-03
Anticipated expiration: 2030-04-29

Abstract

The utility model provides a long-life sliding potentiometer, which comprises a bottom plate, wherein a slide seat is connected on the bottom plate, an upper cover is connected on the slide seat, a resistance layer is arranged at the upper end of the slide seat, and a rolling brush module is connected on the resistance layer; the rolling electric brush module comprises a sliding block, a poke rod, a first conducting strip, a second conducting strip and four rolling balls, wherein intervals are formed between the first conducting strip and the second conducting strip, and the four rolling balls are respectively in rolling connection with the upper end faces of the first carbon membrane, the second carbon membrane, the third carbon membrane and the fourth carbon membrane. The utility model discloses a slip potentiometre changes traditional slidingtype contact into the roll and makes the contact, has improved product life, has improved the precision.

Description

Sliding potentiometer with long service life

Technical Field

The utility model relates to a potentiometre technical field, concretely relates to long-life slip potentiometre.

Background

The potentiometer is an adjustable electronic component, which is composed of a 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 by 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. It is mostly used as a voltage divider, when the potentiometer is a four-terminal element. The potentiometer is basically a slide rheostat, has several types, and is generally used as an adjustable electronic component for a sound box volume switch and a laser head power size adjusting potentiometer.

The sliding potentiometer, also called a direct sliding potentiometer, is a resistor disc of an electric brush on a sliding seat slides along a straight line, and the electric brush and the resistor disc act together to adjust voltage. In the sliding potentiometer in the prior art, a contact end which is bent downwards is usually contacted with a resistor disc, the contact position is adjusted in a sliding mode, the contact position of the contact end and the resistor disc has great sliding friction force, the contact position is easy to wear and has short service life, and a brush of the contact end is easy to deform without recovery after long-term use, so that the conductivity of the brush of the contact end and the resistor disc is influenced.

SUMMERY OF THE UTILITY MODEL

To above problem, the utility model provides a long-life slip potentiometre changes traditional slidingtype contact into the roll and makes the contact, has improved product life, has improved the precision.

In order to achieve the above object, the present invention provides the following technical solutions:

a sliding potentiometer with a long service life comprises a bottom plate, wherein a sliding seat is connected to the bottom plate, an upper cover is connected to the sliding seat, a resistance layer is arranged at the upper end of the sliding seat, and a rolling electric brush module is connected to the resistance layer;

the upper cover is provided with a abdicating groove;

the resistance layer comprises a first carbon diaphragm, a second carbon diaphragm, a third carbon diaphragm and a fourth carbon diaphragm, wherein one end of the first carbon diaphragm and one end of the fourth carbon diaphragm are connected with a conductive pin, and the two ends of the second carbon diaphragm and the third carbon diaphragm are both connected with the conductive pin;

the rolling electric brush module comprises a sliding block, a poke rod connected to the upper end of the sliding block, a first conducting strip, a second conducting strip, a spring connected to the lower ends of the first conducting strip and the second conducting strip, and balls located on the lower side of the spring, wherein the number of the balls is four, and the balls are in rolling connection with the upper end faces of the first carbon diaphragm, the second carbon diaphragm, the third carbon diaphragm and the fourth carbon diaphragm respectively.

Specifically, the lower end of the bottom plate is also connected with a mounting foot.

Specifically, the edge of the lower end of the upper cover is connected with a limiting pin, and the edges of the sliding seat and the bottom plate are provided with limiting grooves for inserting the limiting pin.

Specifically, first supplementary installation department has still been extended at first conducting strip both ends, second conducting strip both ends have still extended the supplementary installation department of second.

Specifically, the poke rod lower extreme is equipped with the installation end, the installation end embedding the sliding block inboard with the sliding block integration is connected, the sliding block inboard still is equipped with the locating lever, be equipped with on the installation end with locating lever matched with locating hole.

Specifically, the lower end of the sliding block is provided with four round holes for accommodating the spring.

The utility model has the advantages that:

the utility model discloses a sliding potentiometer changes traditional slidingtype contact into the roll and makes the contact, becomes sliding friction rolling friction to improve product life, improve the precision, also make the contact performance improve simultaneously, reduce the brush deformation phenomenon of the contact jaw that leads to in equipment or the use, thereby make the quality of product obtain better assurance.

Drawings

Fig. 1 is a schematic structural view of a sliding potentiometer with a long service life according to the present invention.

Fig. 2 is a right side view of the sliding potentiometer with a long service life according to the present invention.

3 fig. 3 3 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 the 3 plane 3 a 3- 3 a 3 in 3 fig. 32 3. 3

Fig. 4 is an exploded view of a long-life sliding potentiometer according to the present invention.

Fig. 5 is a schematic structural diagram of the rolling brush module according to the present invention.

The reference signs are: the carbon film type electric brush comprises a bottom plate 1, a mounting pin 11, a sliding seat 2, a limiting groove 21, an upper cover 3, a yielding groove 31, a limiting pin 32, a resistance layer 4, a first carbon film 41, a second carbon film 42, a third carbon film 43, a fourth carbon film 44, a rolling brush module 5, a sliding block 51, a positioning rod 511, a poke rod 52, a mounting end 521, a first conducting strip 53, a first auxiliary mounting part 531, a second conducting strip 54, a second auxiliary mounting part 541, a spring 55, a ball 56 and a conducting pin 6.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

Referring to FIGS. 1-5:

the utility model provides a long-life slip potentiometre, includes bottom plate 1, is connected with slide 2 on the bottom plate 1, is connected with upper cover 3 on the slide 2, and slide 2 upper ends are equipped with resistive layer 4, are connected with rolling brush module 5 on the resistive layer 4.

The upper cover 3 is provided with a receding groove 31, the receding groove 31 is of a waist-hole structure, and has the functions of allowing the upper end of the rolling electric brush module 5 to slide and limiting two side faces of the upper end of the rolling electric brush module 5, so that the rolling electric brush module 5 is ensured to roll along a straight line.

The resistance layer 4 includes a first carbon diaphragm 41, a second carbon diaphragm 42, a third carbon diaphragm 43, and a fourth carbon diaphragm 44, wherein one end of the first carbon diaphragm 41 or the fourth carbon diaphragm 44 is connected with a conductive pin 6, and both ends of the second carbon diaphragm 42 or the third carbon diaphragm 43 are connected with the conductive pin 6.

The rolling brush module 5 includes a sliding block 51, a dial rod 52 connected to the upper end of the sliding block 51, a first conductive sheet 53 fixed to the inner side of the sliding block 51, a second conductive sheet 54, a spring 55 connected to the lower ends of the first conductive sheet 53 and the second conductive sheet 54, and four balls 56 located below the spring 55, wherein the first conductive sheet 53 and the second conductive sheet 54 are spaced apart from each other, and the number of the balls 56 is four, and the four balls are respectively connected to the upper end surfaces of the first carbon diaphragm 41, the second carbon diaphragm 42, the third carbon diaphragm 43, and the fourth carbon diaphragm 44 in a rolling manner. The first conductive sheet 53 should be disposed above the first carbon membrane 41 and the second carbon membrane 42, the first carbon membrane 41 and the second carbon membrane 42 are electrically connected through the balls 56, the springs 55, the first conductive sheet 53, the springs 55 and the balls 56, and the first conductive sheet 53 serves as a "bridge" between the first carbon membrane 41 and the second carbon membrane 42; the second conductive sheet 54 should be disposed above the third carbon membrane 43 and the fourth carbon membrane 44, the third carbon membrane 43 and the fourth carbon membrane 44 are electrically connected through the balls 56, the springs 55, the second conductive sheet 54, the springs 55 and the balls 56, and the second conductive sheet 54 serves as a "bridge" between the two. In order to realize the continuous electrical conduction between the first conductive sheet 53 and the first and

second carbon diaphragms

41 and 42 and the continuous electrical conduction between the second conductive sheet 54 and the third and

fourth carbon diaphragms

43 and 44, the spring 55 and the balls 56 are made of conductive materials, the conduction principle between the rolling brush module 5 and the resistance layer 4 is similar to that of a conventional sliding rheostat, and the output resistance is adjusted by utilizing the difference of the contact positions of the balls 56 on the first, second, third and

fourth carbon diaphragms

41, 42, 43 and 44, so that the output voltage or current is changed.

Preferably, a mounting leg 11 is further connected to the lower end of the base plate 1 to facilitate mounting of the slide potentiometer.

Preferably, in order to improve the structural stability between the upper cover 3 and the sliding base 2 and the bottom plate 1 and prevent the upper cover 3 from deviating, the lower end edge of the upper cover 3 is connected with a limiting pin 32, and the edges of the sliding base 2 and the bottom plate 1 are provided with a limiting groove 21 for inserting the limiting pin 32.

Preferably, in order to stabilize the first conductive sheet 53 and the second conductive sheet 54 in the slide block 51 and prevent them from loosening, first auxiliary mounting portions 531 are further extended from both ends of the first conductive sheet 53, and second auxiliary mounting portions 541 are further extended from both ends of the second conductive sheet 54.

Preferably, the lower end of the toggle rod 52 is provided with an installation end 521, the sliding block 51 is coated outside the installation end 521 by injection molding technology, after molding, the installation end 521 is embedded inside the sliding block 51 and integrally connected with the sliding block 51, the inner side of the sliding block 51 is further provided with a positioning rod 511, and the installation end 521 is provided with a positioning hole matched with the positioning rod 511.

Preferably, the sliding block 51 lower extreme is equipped with four round holes that supply the holding of spring 55, and the round hole is used for having the direction limiting displacement to spring 55, prevents spring 55 off normal, has guaranteed that spring 55 is perpendicular putting to have and lasting decurrent pressure, guaranteed the stability of electrical contact between ball 56 and first carbon diaphragm 41, second carbon diaphragm 42, third carbon diaphragm 43, the fourth carbon diaphragm 44.

The above examples only represent 1 embodiment of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The sliding potentiometer with the long service life is characterized by comprising a bottom plate (1), wherein a sliding seat (2) is connected onto the bottom plate (1), an upper cover (3) is connected onto the sliding seat (2), a resistance layer (4) is arranged at the upper end of the sliding seat (2), and a rolling electric brush module (5) is connected onto the resistance layer (4);

the upper cover (3) is provided with a yielding groove (31);

the resistor layer (4) comprises a first carbon diaphragm (41), a second carbon diaphragm (42), a third carbon diaphragm (43) and a fourth carbon diaphragm (44), wherein one end of each of the first carbon diaphragm (41) and the fourth carbon diaphragm (44) is connected with a conductive pin (6), and two ends of each of the second carbon diaphragm (42) and the third carbon diaphragm (43) are connected with the conductive pin (6);

the rolling electric brush module (5) comprises a sliding block (51), a poke rod (52) connected to the upper end of the sliding block (51), a first conducting strip (53) and a second conducting strip (54) fixed on the inner side of the sliding block (51), a spring (55) connected to the lower ends of the first conducting strip (53) and the second conducting strip (54), and balls (56) located on the lower side of the spring (55), wherein intervals are formed between the first conducting strip (53) and the second conducting strip (54), and the number of the balls (56) is four, and the four balls are respectively in rolling connection with the upper end faces of the first carbon membrane (41), the second carbon membrane (42), the third carbon membrane (43) and the fourth carbon membrane (44).

2. A long life sliding potentiometer according to claim 1, characterized in that the lower end of the base plate (1) is further connected with a mounting foot (11).

3. The sliding potentiometer with long service life according to claim 1, wherein the lower end edge of the upper cover (3) is connected with a limit pin (32), and the edges of the sliding base (2) and the bottom plate (1) are both provided with limit grooves (21) for the limit pin (32) to insert.

4. A long life sliding potentiometer according to claim 1, wherein a first auxiliary mounting portion (531) extends from each end of the first conductive plate (53), and a second auxiliary mounting portion (541) extends from each end of the second conductive plate (54).

5. The long-life sliding potentiometer according to claim 1, wherein the lower end of the toggle rod (52) is provided with a mounting end (521), the mounting end (521) is embedded into the inner side of the sliding block (51) and integrally connected with the sliding block (51), the inner side of the sliding block (51) is further provided with a positioning rod (511), and the mounting end (521) is provided with a positioning hole matched with the positioning rod (511).

6. A long life sliding potentiometer according to claim 1, characterized in that the lower end of the sliding block (51) is provided with four circular holes for receiving the springs (55).