Multi-gear adjustable resistance potentiometer

Abstract

The utility model discloses a multi-gear adjustable resistance potentiometer in the technical field of circuit components, and aims to solve the problem that the resistance value of a potentiometer in the prior art is continuously and linearly changed, so that the use requirements under multiple working conditions cannot be met. The device comprises a substrate and an electric brush rotating in the middle of the substrate, an inner ring wire copper sheet and two wiring copper sheets located on the two sides of the inner ring wire copper sheet are laid on the substrate, and an annular carbon film resistor and an annular circuit sheet are connected between the two wiring copper sheets. The annular circuit piece and the annular carbon film resistor can directly communicate with the two wiring copper pieces respectively, the radiuses of rings where the annular circuit piece and the annular carbon film resistor are located are different, and the annular circuit piece and the annular carbon film resistor are connected through a plurality of second wires. According to the utility model, the linear change resistance of the traditional potentiometer is converted into the multi-gear control resistance, and the adjustment of various gears can be realized through rotation, so that the requirements of customers in different application scenes are met.

Description

Technical Field

[0001] This utility model relates to a multi-position adjustable resistor potentiometer, belonging to the technical field of circuit components. Background Technology

[0002] With the development of electronic products, the demand for product diversification is increasing. As a feedback source for electronic product control, PCB products with carbon film are subject to higher quality and diversification requirements. Currently, customers require potentiometers with non-linear adjustable resistors. However, based on the principle of traditional potentiometers, the contacts slide on the toroidal carbon film resistor, which basically exhibits a continuous linear change in resistance. To transform linear control into multi-level non-linear control, traditional potentiometers are difficult to achieve by simply rotating them. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a multi-level adjustable potentiometer, which transforms the linear variable resistance of a traditional potentiometer into a multi-level controllable resistance. It can be adjusted to various levels by rotation to meet the needs of customers in different application scenarios.

[0004] To achieve the above objectives, this utility model employs the following technical solution:

[0005] This utility model provides a multi-position adjustable resistor potentiometer, including a substrate and a brush rotating in the middle of the substrate. The substrate has an inner ring copper wire sheet and two connecting copper sheets on both sides of the inner ring copper wire sheet. An annular carbon film resistor and an annular circuit piece are connected between the two connecting copper sheets. The annular circuit piece and the annular carbon film resistor can be directly connected to the two connecting copper sheets. The radii of the annular circuit piece and the annular carbon film resistor are different. The annular circuit piece and the annular carbon film resistor are connected by multiple second wires. Each second wire can be disconnected individually. The brush includes at least two conductive contacts, which are in contact with the annular carbon film resistor and the inner ring copper wire sheet, respectively.

[0006] Specifically, the second conductor is a carbon film resistor printed between the toroidal carbon film resistor and the toroidal circuit chip.

[0007] Specifically, the multiple contact points of the carbon film resistors and the annular carbon film resistors are arranged at equal intervals.

[0008] Specifically, the ring-shaped circuit chip is a printed silver layer or copper foil.

[0009] Specifically, the width of the ring circuit piece is 0.15mm to 0.2mm.

[0010] Specifically, it also includes a protective shell mounted on the substrate, and the brush further includes a rotating head and a connecting rod. The rotating head is rotatably disposed on a rotating hole opened in the middle of the substrate, and the connecting rod extends in a direction perpendicular to the axis of the rotating head. Two electrically connected conductive contacts are fixedly disposed on the connecting rod, and the protective shell completely covers the rotation path of the connecting rod.

[0011] Specifically, a viewing window is provided at the top of the protective shell.

[0012] Specifically, the inner side of the viewing window is covered with a doped tungsten oxide film.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0014] This invention, by setting a ring circuit piece on the side of the ring carbon film resistor and a second wire that can be independently switched on and off, allows the connection of each wire to be adjusted before the potentiometer leaves the factory. This enables different resistance values ​​to be achieved in different sections of the potentiometer through parallel connection, thus allowing for multiple adjustment levels during brush rotation. This is beneficial for meeting customers' needs for multi-level variable resistors. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the potentiometer provided in this embodiment of the utility model;

[0016] Figure 2 This is a partial structural schematic diagram of the potentiometer provided in an embodiment of the present invention;

[0017] Figure 3 This is a utility model Figure 2 An enlarged view of the potentiometer structure at point A provided in the embodiment;

[0018] Figure 4 This is a top view of the carbon film resistor layout provided in an embodiment of the present invention;

[0019] Figure 5 This is a utility model Figure 4 A cross-sectional view of the potentiometer along the BB direction provided in the embodiment;

[0020] Reference numerals: 1. Substrate; 2. Inner ring copper conductor sheet; 3. Connecting copper sheet; 4. Annular carbon film resistor; 5. Annular circuit piece; 6. Second conductor; 7. Rotating column head; 8. Connecting rod; 9. Conductive contact piece; 10. Protective shell; 11. Viewing window. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example:

[0024] This utility model provides a multi-level adjustable potentiometer, which transforms the linear resistance of a traditional potentiometer into a multi-level controllable resistor. It allows for adjustment of various levels through rotation to meet the needs of different application scenarios. To achieve the functional structure of the potentiometer, it includes a substrate 1 and a brush that rotates at the center of the substrate 1. Figure 2 as well as Figure 4 As shown, an inner ring copper conductor 2 and two connecting copper pieces 3 located on both sides of the inner ring copper conductor 2 are laid on the substrate 1. These copper pieces can be attached to the substrate 1 by printing or electroplating. The inner ring copper conductor 2 is circular in shape and is used to connect to the terminals. The two connecting copper pieces 3 are respectively connected to their corresponding terminals. To achieve multi-range adjustable resistance, a ring-shaped carbon film resistor 4 and a ring-shaped circuit piece 5 are connected between the two connecting copper pieces 3. (Refer to...) Figure 4The circuit is laid out in a manner where the annular circuit piece 5 and the annular carbon film resistor 4 are directly connected to two copper connecting pieces 3. The radii of the annular circuit piece 5 and the annular carbon film resistor 4 are different. The annular circuit piece 5 can be distributed inside or outside the annular carbon film resistor 4. The annular circuit piece 5 and the annular carbon film resistor 4 are connected by multiple second wires 6, and each second wire 6 can be disconnected individually. In actual use of this circuit module, the annular carbon film resistor 4 can be adjusted by laser and divided into several different resistance value segments. By connecting the corresponding second wires 6, a parallel resistor circuit is formed, providing different parallel resistance value ranges, thereby realizing multi-level adjustment function. In order to achieve normal circuit connection, the brush is set to include at least two conductive contacts 9, and the two conductive contacts 9 are respectively in contact with the annular carbon film resistor 4 and the inner ring copper connecting piece 2. After laser adjustment and changing the on / off state of the corresponding second wire 6, the current flows from the ring circuit piece 5 through the corresponding second wire 6 and then through the conductive contact 9. Multiple different sections can exhibit different resistance value changes during the rotation of the conductive contact 9, thereby achieving the effect of multi-segment control and improving the applicability of the product.

[0025] This utility model provides a multi-position adjustable potentiometer. To facilitate the control of disconnecting the second lead 6, the second lead 6 can be configured as a carbon film resistor printed between the annular carbon film resistor 4 and the annular circuit chip 5. Figure 4 As shown, before the finished product is prepared, the carbon film resistor segment uniformly covers and connects the annular carbon film resistor 4 and the annular circuit piece 5. When the resistance value varies in different ranges corresponding to the customer's requirements, the resistance range of the carbon film structure is adjusted by laser until the customer's requirements are met and the finished product is finally prepared.

[0026] This utility model provides a multi-position adjustable resistor potentiometer. In order to facilitate the calculation of the required resistance fluctuation range, multiple carbon film resistors and multiple connecting contact points of the ring carbon film resistor 4 can be set at equal intervals. That is, the positions of every two adjacent connecting contact points represent the rated resistance range, which is beneficial to setting and processing according to the actual product requirements.

[0027] This utility model provides a multi-position adjustable resistor potentiometer. In order to improve the energizing effect of the ring circuit piece 5 as a circuit, the ring circuit piece 5 can be set to a printed silver layer or copper foil. In a preferred embodiment, the width of the ring circuit piece 5 can be designed to be 0.15mm~0.2mm.

[0028] This utility model provides a multi-position adjustable potentiometer. To prevent damage to the internal carbon film resistor from affecting the resistance value, the potentiometer also includes a protective shell 10 mounted on the substrate 1. Specifically, the brush also includes a rotating post 7 and a connecting rod 8. Figure 2 and Figure 3 As shown, the rotating head 7 is rotatably mounted on the rotating hole opened in the middle of the substrate 1. The connecting rod 8 extends in a direction perpendicular to the axis of the rotating head 7. Two electrically connected conductive contacts 9 are fixedly mounted on the connecting rod 8. The protective shell 10 completely covers the rotation path of the connecting rod 8 to protect against accidental contact or wear from the outside.

[0029] This utility model provides a multi-position adjustable resistor potentiometer. In order to facilitate observation of whether the internal circuit structure has been burned or damaged in the event of a system failure, and thus facilitate diagnosis and repair, a viewing window 11 can be provided at the top of the protective shell 10.

[0030] This utility model provides a multi-position adjustable potentiometer. In order to determine whether the potentiometer has abnormal temperature rise during operation during maintenance, a doped tungsten oxide film can be applied to the inside of the viewing window 11. Preferably, the tungsten oxide film can undergo irreversible discoloration at a temperature above 60 degrees Celsius. This allows for determination during maintenance whether the resistive part exceeds the abnormal temperature during operation. In the event of abnormal damage, this provides evidence for updating the product design (such as the thickness and width of the ring circuit piece 5 or the contact point design of the conductive contact piece 9).

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A multi-position adjustable resistance potentiometer, characterized by, The utility model relates to a carbon film resistance brush, which comprises a substrate (1) and a brush rotating at a middle position of the substrate (1), wherein the substrate (1) is provided with an inner ring conductor copper sheet (2) and two terminal copper sheets (3) on both sides of the inner ring conductor copper sheet (2), an annular carbon film resistance (4) and an annular circuit sheet (5) are connected between the two terminal copper sheets (3), the annular circuit sheet (5) and the annular carbon film resistance (4) can directly communicate with the two terminal copper sheets (3) respectively, the annular circuit sheet (5) and the annular carbon film resistance (4) are located in different radius circles, a plurality of second conductors (6) are connected between the annular circuit sheet (5) and the annular carbon film resistance (4), each second conductor (6) can be disconnected individually, and the brush comprises at least two conductive contact pieces (9) which are in contact with the annular carbon film resistance (4) and the inner ring conductor copper sheet (2) respectively.

2. A multi-position adjustable resistance potentiometer according to claim 1, wherein, The second conductor (6) is a carbon film resistance printed between the annular carbon film resistance (4) and the annular circuit sheet (5).

3. A multi-position adjustable resistance potentiometer according to claim 2, wherein, The plurality of carbon film resistances are arranged at equal intervals with the plurality of connecting points of the annular carbon film resistance (4).

4. A multi-position adjustable resistance potentiometer according to claim 1, wherein, The annular circuit sheet (5) is a printed silver layer or copper foil.

5. A multi-position adjustable resistance potentiometer according to claim 4, wherein, The width of the annular circuit sheet (5) is 0.15mm-0.2mm.

6. A multi-position adjustable resistance potentiometer according to claim 1, wherein, The utility model further comprises a protective shell (10) mounted on the substrate (1), the brush further comprises a rotating stud (7) and a connecting rod (8), the rotating stud (7) is arranged on a rotating hole formed at a middle position of the substrate (1), the connecting rod (8) extends in a direction perpendicular to the axis of the rotating stud (7), and the two conductive contact pieces (9) are fixedly arranged on the connecting rod (8), and the protective shell (10) completely covers the rotating path of the connecting rod (8).

7. A multi-position adjustable resistance potentiometer according to claim 6, wherein, A perspective window (11) is arranged at a top position of the protective shell (10).

8. A multi-position adjustable resistance potentiometer according to claim 7, wherein, A doped tungsten oxide film is arranged on the inner side of the perspective window (11).

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