Conductive stable potentiometer

Abstract

The utility model relates to the technical field of potentiometers, and discloses a conductive stable potentiometer which comprises a base, a positioning column, a resistor disc, a rotary electric brush and a lock cover shell, an accommodating groove is formed in the base; the positioning column is mounted on the groove bottom of the accommodating groove; the resistor discs are provided with positioning holes; the resistor disc is adaptively embedded into the accommodating groove, and the positioning column is aligned to and penetrates through the positioning hole so as to fix the resistor disc in the accommodating groove; the rotary electric brush is rotatably connected to the base and is in electric contact connection with the resistor disc; the lock cover shell is connected to the base in a matched and buckled mode at the position corresponding to the containing groove. According to the conductive stable potentiometer provided by the utility model, a triple positioning mechanism is designed, so that the structure is stable and reliable, the position deviation of the resistor disc in the using process is effectively avoided, the conductive stability of the potentiometer in the adjusting process is ensured, and the overall performance of equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of potentiometers, in particular to a potentiometer with stable conductivity. Background Art

[0002] A potentiometer is a resistive element with three leads and a resistance value that can be adjusted according to a certain variation law. A potentiometer usually consists of a resistive body and a movable brush. When the brush moves along the resistive body, a resistance value or voltage related to the displacement is obtained at the output end.

[0003] Chinese Patent with application number CN202321475984.X discloses a rotary potentiometer with easy assembly, including an insulating housing. One side of the insulating housing is provided with a receiving cavity, in which a resistance sheet and a rotary brush sandwiched between the insulating housing and the receiving cavity are installed. The insulating housing and the resistance sheet are connected through a snap structure. Each conductive terminal of the rotary brush is in electrical contact with the corresponding resistance paint on the resistance sheet. The snap structure includes a snap provided on the edge of the insulating housing and a slot provided on the edge of the resistance sheet. After assembly, the snap is snapped into the slot. However, the way of assembling the resistance sheet of this rotary potentiometer with easy assembly in the insulating housing through the snap structure still has problems such as loose structure and inaccurate positioning during use, resulting in unstable conductivity, which in turn affects the overall performance and service life of the device. Especially in high-frequency vibration or harsh environments, the reliability of the potentiometer faces severe challenges. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the problems of the prior art and provide a potentiometer with stable conductivity.

[0005] To achieve the above purpose, the utility model adopts the following scheme:

[0006] A potentiometer with stable conductivity includes a base; there is a receiving groove on the base; the potentiometer with stable conductivity further includes:

[0007] A positioning post, which is installed on the bottom of the receiving groove;

[0008] A resistance sheet, which has a positioning hole adapted to the positioning post; the resistance sheet is fitted into the receiving groove, and the positioning post is aligned and passed through the positioning hole to fix the resistance sheet in the receiving groove;

[0009] A rotary brush, which is rotatably connected to the base and is in electrical contact with the resistance sheet;

[0010] A lock cover, which is snap-fitted to the base at a position corresponding to the receiving groove.

[0011] Further, a limiting hook is provided on the groove side wall of the accommodating groove; a limiting protrusion is provided at a position corresponding to the limiting hook along the edge of the resistance sheet;

[0012] When the resistance sheet is fitted and embedded into the accommodating groove, the limiting protrusion slides over the limiting hook along with the embedding movement of the resistance sheet and is buckled in the limiting hook.

[0013] Further, a plurality of lock cover hooks are arranged on the outer peripheral wall of the base; on the edge of the lock cover shell, there are lock hook notches with the same number and one-to-one corresponding positions as the lock cover hooks;

[0014] When the lock cover shell is fitted and covered on the base, the lock hook notches are fitted and buckled on the lock cover hooks.

[0015] Further, a positioning protrusion is provided on the base on the groove side wall of the accommodating groove; a positioning groove is provided at a position corresponding to the positioning protrusion on the resistance sheet.

[0016] Further, an arc-shaped or annular first resistance paint layer is provided on the surface of the resistance sheet, and a second resistance paint layer in a ring shape is located inside the first resistance paint layer;

[0017] The rotary brush includes a first conductive part in electrical contact with the first resistance paint layer, a second conductive part in electrical contact with the second resistance paint layer, and a conductive sheet electrically connected to both the first conductive part and the second conductive part; the radius of the first conductive part is greater than the radius of the second conductive part;

[0018] The conductive sheet is rotatably connected to the base through a rotating shaft sleeve.

[0019] Further, the first conductive part and the second conductive part are both provided with wrinkled parts in electrical contact with the first resistance paint layer and the second resistance paint layer respectively.

[0020] Further, the first conductive part and the second conductive part both have arc-shaped conductive wires, there are several conductive wires, and adjacent conductive wires are separated from each other.

[0021] Further, the first conductive part bends towards the first resistance paint layer; the second conductive part bends towards the second resistance paint layer.

[0022] Further, both the first resistance paint layer and the second resistance paint layer are conductive silver paint layers.

[0023] Further, a first conductive extension layer and a second conductive extension layer electrically connected to the first resistance paint layer and the second resistance paint layer respectively are connected to the resistance sheet;

[0024] A first power connection terminal and a second power connection terminal which are electrically connected to the first conductive extension layer and the second conductive extension layer respectively are connected to the base.

[0025] Compared with the prior art, the utility model has the following advantages:

[0026] By combining a base, positioning posts, a resistance sheet, a rotating brush and a locking cover shell, the utility model first designs a receiving groove to be adaptively installed with the resistance sheet to form a first-level positioning, then designs positioning holes on the resistance sheet to be adaptively sleeved on the positioning posts to form a second-level positioning, and further forms a third-level positioning by adaptively snap-connecting the locking cover shell to the base corresponding to the position of the receiving groove. Through such a design of a triple positioning mechanism, the structure is stable and reliable, effectively avoiding the position deviation of the resistance sheet during use, ensuring the conductive stability of the potentiometer during the adjustment process, and improving the overall performance of the device. Description of the Drawings

[0027] The following further describes the present application in detail with reference to the drawings and specific embodiments.

[0028] Figure 1 is an exploded three-dimensional structural schematic diagram of the conductive stable potentiometer of the present utility model.

[0029] Figure 2 is a three-dimensional structural schematic diagram of the conductive stable potentiometer of the present utility model.

[0030] Figure 3 is a three-dimensional structural schematic diagram of the base of the present utility model.

[0031] Figure 4 is a three-dimensional structural schematic diagram of the resistance sheet of the present utility model.

[0032] Figure 5 is a three-dimensional structural schematic diagram of the rotating brush of the present utility model.

[0033] The figures include:

[0034] Base 1, receiving groove 11, limit hook 12, positioning protrusion 13, positioning post 2, resistance sheet 3, positioning hole 31, limit protrusion 32, positioning groove 33, first resistance paint layer 34, second resistance paint layer 35, first conductive extension layer 36, second conductive extension layer 37, rotating brush 4, first conductive part 41, second conductive part 42, conductive sheet 43, corrugated part 44, conductive wire 45, locking cover shell 5, lock hook bayonet 51, lock cover hook 6, rotating shaft sleeve 7, first power connection terminal 8, second power connection terminal 9. Specific Embodiments

[0035] The following will further describe in detail the specific implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0036] As Figures 1 to 5 shown, a conductive stable potentiometer includes a base 1, a positioning post 2, a resistance sheet 3, a rotating brush 4, and a lock cover 5; a receiving groove 11 is provided on the base 1; the positioning post 2 is installed on the bottom of the receiving groove 11; the resistance sheet 3 has a positioning hole 31 adapted to the positioning post 2; the resistance sheet 3 is fitted and embedded in the receiving groove 11, and the positioning post 2 is aligned and passed through the positioning hole 31 to fix the resistance sheet 3 in the receiving groove 11; the rotating brush 4 is rotatably connected to the base 1 and is electrically connected to the resistance sheet 3; the lock cover 5 is snap-connected to the base 1 at a position corresponding to the receiving groove 11.

[0037] By combining the base 1, the positioning post 2, the resistance sheet 3, the rotating brush 4, and the lock cover 5, the conductive stable potentiometer first designs the receiving groove 11 to be adapted to the installation of the resistance sheet 3 to form a first-level positioning, and then designs the positioning hole 31 on the resistance sheet 3 to be adapted to fit on the positioning post 2 to form a second-level positioning. Further, the lock cover 5 is snap-connected to the base 1 at a position corresponding to the receiving groove 11 to form a third-level positioning. By designing such a three-level positioning mechanism, the structure is stable and reliable, effectively avoiding the position deviation of the resistance sheet 3 during use, ensuring the conductive stability of the potentiometer during the adjustment process, and improving the overall performance of the device.

[0038] In order to strengthen the stability of the resistance sheet 3 in the receiving groove 11, effectively avoid the position deviation of the resistance sheet 3 during use, ensure the conductive stability of the potentiometer during the adjustment process, and improve the overall performance of the device. Limit hooks 12 are provided on the side wall of the receiving groove 11; limit protrusions 32 are provided on the edge of the resistance sheet 3 corresponding to the position of the limit hooks 12; when the resistance sheet 3 is fitted and embedded in the receiving groove 11, the limit protrusions 32 slide over the limit hooks 12 along with the embedding movement of the resistance sheet 3 and are snapped in the limit hooks 12. Designing the limit hooks 12 and the limit protrusions 32 in this way is beneficial to the resistance sheet 3 being clamped in the receiving groove 11, not easily loosening and jumping out of the receiving groove 11, effectively avoiding the position deviation of the resistance sheet 3 during use, ensuring the conductive stability of the potentiometer during the adjustment process, and improving the overall performance of the device.

[0039] In order to enhance the connection stability between the lock cover housing 5 and the base 1 and facilitate disassembly and assembly, a number of lock cover hooks 6 are arranged on the outer peripheral wall of the base 1; on the edge of the lock cover housing 5, there are lock hook bayonets 51 with the same number and corresponding positions as the lock cover hooks 6; when the lock cover housing 5 is properly covered on the base 1, the lock hook bayonets 51 are properly snapped onto the lock cover hooks 6. Snapping a number of lock cover hooks 6 onto the lock hook bayonets 51 one by one has a simple structure, is convenient for disassembly and assembly, and is convenient for installation and maintenance. At the same time, it can enhance the connection stability between the lock cover housing 5 and the base 1, ensuring the conductive stability of the potentiometer during the adjustment process and improving the overall performance of the device.

[0040] In order to further enhance the connection stability between the resistance sheet 3 and the base 1, the base 1 has positioning protrusions 13 on the groove side walls of the accommodation groove 11; at positions corresponding to the positioning protrusions 13 on the resistance sheet 3, there are positioning grooves 33. Embedding the positioning protrusions 13 into the positioning grooves 33 forms a fourth-level positioning, making it difficult for the resistance sheet 3 to shift in the horizontal direction relative to the base 1, effectively avoiding the position shift of the resistance sheet 3 during use, ensuring the conductive stability of the potentiometer during the adjustment process, and improving the overall performance of the device.

[0041] In this embodiment, an arc-shaped or ring-shaped first resistance paint layer 34 and a ring-shaped second resistance paint layer 35 located within the first resistance paint layer 34 are provided on the surface of the resistance sheet 3; the rotary brush 4 includes a first conductive part 41 in electrical contact with the first resistance paint layer 34, a second conductive part 42 in electrical contact with the second resistance paint layer 35, and a conductive sheet 43 electrically connected to both the first conductive part 41 and the second conductive part 42; the radius of the first conductive part 41 is greater than the radius of the second conductive part 42; the conductive sheet 43 is rotatably connected to the base 1 through a shaft sleeve 7. Thus, by designing the first resistance paint layer 34 and the second resistance paint layer 35 on the resistance sheet 3, and forming the rotary brush 4 through the first conductive part 41, the second conductive part 42, and the conductive sheet 43, and rotating circumferentially around the axis of the rotary brush 4, electrical connection between the resistance sheet 3 and the rotary brush 4 is achieved, facilitating adjustment of the resistance value of the resistance sheet 3, so that this conductive stability type potentiometer can be better applied in electronic devices such as robots and drones.

[0042] Preferably, the first conductive part 41 and the second conductive part 42 are both provided with wrinkled parts 44 that are in electrical contact with the first resistance paint layer 34 and the second resistance paint layer 35 respectively. By designing the wrinkled parts 44 on both the first conductive part 41 and the second conductive part 42, better electrical contact with the first resistance paint layer 34 and the second resistance paint layer 35 is achieved, resulting in a good conductive effect.

[0043] Furthermore, both the first conductive part 41 and the second conductive part 42 have arc-shaped conductive wires 45. There are several conductive wires 45, and adjacent conductive wires 45 are separated from each other.

[0044] To ensure better electrical conductivity between the first conductive part 41 and the first resistive paint layer 34, and between the second conductive part 42 and the second resistive paint layer 35, and improve the electrical contact between structures, the first conductive part 41 is bent towards the first resistive paint layer 34; the second conductive part 42 is bent towards the second resistive paint layer 35.

[0045] Preferably, both the first resistive paint layer 34 and the second resistive paint layer 35 are conductive silver paint layers. Designing the first resistive paint layer 34 and the second resistive paint layer 35 in this way improves the high electrical conductivity between the rotary brush 4 and the resistive sheet 3, thereby ensuring the electrical conductivity stability during the adjustment of the potentiometer and improving the overall performance of the device.

[0046] To better connect and conduct electricity and enable the conductive stability potentiometer to be better applied in electronic devices such as robots and drones, a first conductive extension layer 36 and a second conductive extension layer 37 electrically connected to the first resistive paint layer 34 and the second resistive paint layer 35 are respectively connected to the resistive sheet 3; a first power connection terminal 8 and a second power connection terminal 9 electrically connected to the first conductive extension layer 36 and the second conductive extension layer 37 are respectively connected to the base 1.

[0047] In summary, the embodiment of the present utility model provides a conductive stability potentiometer. Among them, the conductive stability potentiometer combines the base 1, the positioning post 2, the resistive sheet 3, the rotary brush 4 and the locking cover 5. First, the accommodating groove 11 is designed to be adapted to the resistive sheet 3 for installation to form a first-level positioning. Then, the positioning hole 31 on the resistive sheet 3 is designed to be sleeved on the positioning post 2 to form a second-level positioning. Further, the locking cover 5 is snap-connected to the base 1 at a position corresponding to the accommodating groove 11 to form a third-level positioning. By designing such a three-level positioning mechanism, the structure is stable and reliable, effectively avoiding the position deviation of the resistive sheet 3 during use, ensuring the electrical conductivity stability during the adjustment of the potentiometer, and improving the overall performance of the device.

[0048] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present application, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present application.

Claims

1. A conductive and stable potentiometer, comprising a base; characterized in that, The base has a receiving groove thereon; The electrically conductive and stable potentiometer further includes: Positioning posts, which are installed on the bottom of the receiving groove; A resistance sheet, which has positioning holes adapted to the positioning posts; the resistance sheet is fittingly embedded in the receiving groove, and the positioning posts are aligned and passed through the positioning holes to fix the resistance sheet in the receiving groove; A rotary brush, which is rotatably connected to the base and is electrically connected in contact with the resistance sheet; A lock cover shell, which is fittingly snap-connected to the base at a position corresponding to the receiving groove.

2. The conductive stable potentiometer according to claim 1, wherein Limit hooks are provided on the side wall of the receiving groove; limit protrusions are provided on the edge of the resistance sheet corresponding to the position of the limit hooks; When the resistance sheet is fittingly embedded in the receiving groove, the limit protrusions slide over the limit hooks as the resistance sheet is embedded and are snapped into the limit hooks.

3. The conductive and stable potentiometer according to claim 1 or 2, characterized in that, A number of lock cover hooks are arranged on the outer peripheral wall of the base; lock hook notches with the same number and corresponding positions one by one as the lock cover hooks are provided on the edge of the lock cover shell; When the lock cover shell is fittingly covered on the base, the lock hook notches are fittingly snapped onto the lock cover hooks.

4. The conductive stable potentiometer according to claim 1, wherein Positioning protrusions are provided on the base on the side wall of the receiving groove; positioning grooves are provided on the resistance sheet corresponding to the positions of the positioning protrusions.

5. The conductive and stable potentiometer according to claim 1, wherein, An arc-shaped or annular first resistance paint layer and a ring-shaped second resistance paint layer located inside the first resistance paint layer are provided on the surface of the resistance sheet; The rotary brush includes a first conductive part in electrical contact with the first resistance paint layer, a second conductive part in electrical contact with the second resistance paint layer, and a conductive sheet electrically connected to both the first conductive part and the second conductive part; the radius of the first conductive part is greater than the radius of the second conductive part; The conductive sheet is rotatably connected to the base through a rotating shaft sleeve.

6. The conductive stable potentiometer according to claim 5, wherein, Both the first conductive part and the second conductive part are provided with wrinkled parts in electrical contact with the first resistance paint layer and the second resistance paint layer respectively.

7. The conductive and stable potentiometer according to claim 5, wherein, Both the first conductive part and the second conductive part have arc-shaped conductive wires, and there are several conductive wires, and adjacent conductive wires are separated from each other.

8. The conductive and stable potentiometer according to claim 5, wherein The first conductive part bends towards the first resistance paint layer; the second conductive part bends towards the second resistance paint layer.

9. The conductive stable potentiometer according to claim 5, characterized in that, Both the first resistance paint layer and the second resistance paint layer are conductive silver paint layers.

10. The conductive stable potentiometer according to claim 5, wherein A first conductive extension layer and a second conductive extension layer electrically connected to the first resistance paint layer and the second resistance paint layer respectively are connected to the resistance sheet; A first power connection terminal and a second power connection terminal electrically connected to the first conductive extension layer and the second conductive extension layer respectively are connected to the base.

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