Inductive slide potentiometer

Abstract

This invention provides an inductive sliding potentiometer, comprising a PCB, a housing, a slider, a sliding base, and a superconductor. The PCB is mounted on the bottom of the housing to form an assembly cavity. An inductor coil is printed in an orderly array on the surface of the PCB facing the assembly cavity. Stop blocks are fixedly disposed on opposite sides of the housing cavity, and the slider is connected between the opposite stop blocks. The sliding base is slidably disposed on the slider, and a lever extends from the upper part of the sliding base beyond the housing. A groove communicating with the assembly cavity and allowing the lever to move is formed on the upper surface of the housing along its length. The superconductor is riveted to the bottom of the sliding base. A gap is formed between the superconductor and the inductor coil. This design eliminates mechanical wear, greatly extends service life, is less susceptible to moisture, and is suitable for harsh operating environments.

Description

Technical Field

[0001] This utility model relates to the field of sliding potentiometer technology, specifically to an inductive sliding potentiometer. Background Technology

[0002] Chinese patent application publication number CN110364322A, published on October 22, 2019, discloses a method for manufacturing a contact-type sliding resistor, comprising the following steps: printing conductive metal paste onto a first thin-film substrate using a squeegee to obtain a first electrode substrate; printing low-resistivity conductive carbon paste onto the first electrode substrate using a squeegee to obtain an electrode layer; printing conductive metal paste onto a second thin-film substrate using a squeegee to obtain a second electrode substrate, forming a high-carbon sliding change effective region within the second conductive film; printing high-resistivity conductive carbon paste onto the second electrode substrate using a squeegee to obtain a circuit layer; preparing a spacer, and using the spacer to bond the electrode layer and the circuit layer together to obtain the contact-type sliding resistor. This invention's method for manufacturing a contact-type sliding resistor can replace traditional levers and contact pieces and be applied to rocker potentiometers, resulting in a small product size, simple operation, and high processing efficiency. The existing technology has the following drawbacks: contact-type sliding resistors suffer from mechanical wear, have a short lifespan, and the carbon film is easily affected by moisture, limiting its usability in certain environments. Therefore, improvements are urgently needed. Utility Model Content

[0003] To address the above problems, this utility model provides an inductive sliding potentiometer that eliminates mechanical wear, greatly extends service life, is less susceptible to moisture, and is suitable for harsh operating environments.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an inductive sliding potentiometer, comprising a PCB, a housing, a slider, a sliding base, and a superconductor; the PCB is mounted on the bottom of the housing to form an assembly cavity; an inductor coil is printed in an orderly array on the surface of the PCB facing the assembly cavity; stop blocks are fixedly provided on opposite sides of the housing cavity, and the slider is connected between the stop blocks on opposite sides; the sliding base is slidably mounted on the slider, and a lever extends out of the housing from the upper part of the sliding base; a groove is formed on the upper surface of the housing along its length direction, communicating with the assembly cavity and allowing the lever to move; the superconductor is riveted to the bottom of the sliding base; a gap is formed between the superconductor and the inductor coil.

[0005] Preferably, the bottom of each of the opposite sides of the outer casing along its length is provided with a fastening portion for connection to the PCB.

[0006] The beneficial effects of this utility model are: the surface of the PCB facing the inner cavity is printed with an orderly array of inductor coils, and a superconductor is riveted to the bottom of the sliding seat. A gap is formed between the superconductor and the inductor coil, realizing physical isolation between the sliding contact and the resistive body, which will not produce mechanical wear and greatly improve the service life; the temperature coefficient is reduced by 50% compared with the traditional carbon film potentiometer, and it maintains stable output in the range of -40℃ to 150℃; the inductive structure avoids the problems of carbon film oxidation and metal film moisture absorption, and can withstand more stringent environmental tests. Attached Figure Description

[0007] Figure 1 This is a perspective view of the present invention.

[0008] Figure 2 This is a cross-sectional view of the present invention.

[0009] Figure 3 This is an exploded view of the present invention.

[0010] The attached figures are labeled as follows: housing 10, PCB 11, lever 12, slide groove 13, inductor coil 14, fastening part 15, stop block 16, slide rod 17, superconductor 18, sliding seat 19. Detailed Implementation

[0011] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0012] Reference Figure 1-3As shown: An inductive sliding potentiometer includes a PCB 11, a housing 10, a slider 17, a sliding base 19, and a superconductor 18. The PCB 11 is mounted on the bottom of the housing 10 to form an assembly cavity. The bottom of opposite sides of the housing 10 along its length has fastening portions 15 for connection with the PCB 11, facilitating assembly. An inductor coil 14 is printed in an orderly array on the surface of the PCB 11 facing the assembly cavity. Stop blocks 16 are fixedly installed on opposite sides of the housing 10's cavity, and a slider 17 is connected between the opposite stop blocks 16. The sliding base 19 is slidably mounted on the slider 17, and a lever 12 extends from the upper part of the sliding base 19 beyond the housing 10. A groove 13, communicating with the assembly cavity and allowing the lever 12 to move, is formed on the upper surface of the housing 10 along its length. A superconductor 18 is riveted to the bottom of the sliding base 19, and a gap is formed between the superconductor 18 and the inductor coil 14. The working principle of this embodiment is as follows: Inductor coils 14 are printed in an orderly array on the surface of PCB11 facing the inner cavity. Each inductor coil 14 and a capacitor integrated in parallel on PCB11 form an LC resonant circuit. During the sliding process, due to the dynamic change in the proportion of superconductor 18 covering different inductor coils 14, the inductance of each inductor coil 14 is different. The system calculates the absolute position of the slider by comparing the frequency offset or impedance change of adjacent inductor coils 14 using an interpolation algorithm.

[0013] In this embodiment, an inductor coil is printed in an orderly array on the surface of the PCB facing the assembly cavity. A superconductor is riveted to the bottom of the sliding seat, and a gap is formed between the superconductor and the inductor coil to achieve physical isolation between the sliding contact and the resistive element, which will not produce mechanical wear and greatly improve the service life. The temperature coefficient is reduced by 50% compared with traditional carbon film potentiometers, and stable output is maintained in the range of -40℃ to 150℃. The inductive structure avoids the problems of carbon film oxidation and metal film moisture absorption, and can withstand more stringent environmental tests.

[0014] The above embodiments illustrate only one implementation of this utility model, and while the description is relatively specific and detailed, it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An inductive sliding potentiometer, characterized in that: The assembly includes a PCB (11), a housing (10), a slide bar (17), a sliding seat (19), and a superconductor (18). The PCB (11) is installed at the bottom of the housing (10) to form an assembly cavity. The surface of the PCB (11) facing the assembly cavity is printed with an ordered array of inductor coils (14). Stop blocks (16) are fixedly provided on both sides of the inner cavity of the housing (10), and the slide bar (17) is connected between the stop blocks (16) on both sides. The sliding seat (19) is slidably disposed on the slide bar (17), and the upper part of the sliding seat (19) extends out of the housing (10) to form a lever (12). The upper surface of the housing (10) is provided with a groove (13) along its length direction that communicates with the assembly cavity and allows the lever (12) to move. The superconductor (18) is riveted to the bottom of the sliding seat (19). A gap is formed between the superconductor (18) and the inductor coil (14).

2. An inductive sliding potentiometer according to claim 1, characterized in that, The bottom of the outer casing (10) on both sides along its length is provided with a fastening part (15) for connection with the PCB (11).

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