Magnetic induction type linear sliding potentiometer for stage sound equipment

Abstract

The utility model provides a magnetic induction type linear sliding potentiometer for stage sound equipment, and relates to the technical field of potentiometers. Comprising a potentiometer shell, a slidable magnet mechanism, a circuit board and magnetic induction sensors, the slidable magnet mechanism is arranged in the potentiometer shell, the circuit board is arranged on one side of the slidable magnet mechanism, the front face of the circuit board faces the slidable magnet mechanism, and the magnetic induction sensors are evenly distributed on the back face of the circuit board. A single-chip microcomputer chip is arranged on the circuit board. According to the magnetic induction type linear sliding potentiometer provided by the utility model, a contact type structure of an electric brush and a carbon film is not adopted any more, but a novel contact-free structure consisting of the slidable magnet mechanism, the circuit board and the magnetic induction sensor is provided, so that the problem of sliding contact effect between the electric brush and the carbon film in the existing linear sliding potentiometer is solved; and the electric signal is easily influenced by an unclean use environment and a long use time, so that the change of the electric signal is unstable.

Description

Technical Field

[0001] This utility model relates to the field of potentiometer technology, specifically a magnetic sliding potentiometer for stage audio equipment. Background Technology

[0002] Potentiometers are frequently used electronic components in various stage sound equipment, and their performance is closely related to the sound quality of the equipment. Existing potentiometers are mainly divided into two types: rotary potentiometers and slide potentiometers. Rotary potentiometers adjust the resistance value by rotating a knob, thereby regulating the current or voltage; while slide potentiometers adjust the resistance value by pushing a push rod. Slide potentiometers are increasingly widely used due to their simple structure and ease of operation.

[0003] However, current sliding potentiometers still have a significant limitation: the electrical signal output is easily affected. Specifically, sliding potentiometers use a contact structure between a brush and a carbon film. The resistance changes by the brush moving across different positions on the carbon film, thus affecting the electrical signal. For example, Chinese patent CN216871690U discloses a miniature potentiometer, including a potentiometer kit and a variable resistor kit. The potentiometer kit includes the potentiometer body and a printed carbon film, while the variable resistor kit includes a rotating shaft, a rotating shell, and a brush. However, in practical applications of this type of potentiometer, if the environment is not clean enough or after prolonged use, the surface of the carbon film is easily contaminated with dust, oil, and other impurities. This causes unstable resistance changes when the brush moves across the carbon film, affecting the stability of the electrical signal. Even without the influence of impurities, because a sliding contact is required between the brush and the carbon film to cause a change in resistance, wear and tear is inevitable after long-term use, also leading to signal instability. Utility Model Content

[0004] The purpose of this invention is to provide a magnetic sliding potentiometer for stage audio equipment, in order to solve the problem mentioned in the background art, where the sliding contact effect between the brush and the carbon film in existing sliding potentiometers is easily affected by unclean operating environments and long operating times, which leads to unstable changes in electrical signals.

[0005] This utility model is achieved using the following technical solution:

[0006] A magnetic sliding potentiometer for stage audio equipment includes a potentiometer housing, a sliding magnet mechanism, a circuit board, and magnetic induction sensors. The sliding magnet mechanism is provided in the potentiometer housing, and a circuit board is provided on one side of the sliding magnet mechanism. The front of the circuit board faces the sliding magnet mechanism, and a plurality of magnetic induction sensors are evenly arranged on the back of the circuit board. A microcontroller chip is provided on the circuit board.

[0007] The magnetic sliding potentiometer provided by this invention no longer uses a contact structure of brushes and carbon film. Instead, it proposes a novel contactless structure consisting of a sliding magnet mechanism, a circuit board, and magnetic induction sensors. Specifically, the circuit board is placed between the sliding magnet mechanism and the magnetic induction sensors. As the sliding magnet mechanism moves, several magnetic induction sensors can sense changes in the magnetic field. The microcontroller chip on the circuit board can convert the magnetic induction signal intensity of several magnetic induction sensors into the corresponding electrical signal change value, thereby achieving the working effect of a sliding potentiometer.

[0008] As a further preferred embodiment of this solution, the slidable magnet mechanism includes a push handle, a sliding assembly, and a magnet. The push handle is connected to the sliding assembly, and the magnet is connected to the sliding assembly. One side of the magnet is the front of the circuit board. A strip-shaped through hole is provided on the potentiometer housing, and the push handle extends out of the strip-shaped through hole. By pushing and pulling the push handle, the sliding assembly can be moved, which in turn can move the magnet. During the movement, the magnet will successively approach, pass by, and move away from several magnetic induction sensors, allowing the several magnetic induction sensors to detect changes in magnetic field strength respectively, thereby generating different magnetic induction signal intensities.

[0009] As a further preferred embodiment of this solution, the sliding assembly includes a slide rail and a slider, the slider being slidably disposed on the slide rail, the slider being connected to a push handle, and a magnet being attached to the surface of the slider.

[0010] As a further preferred embodiment of this solution, a guide rail parallel to the slide rail is provided on one side, and the push handle is slidably connected to the guide rail. By setting the guide rail to guide the movement of the push handle, the movement process becomes more stable and faster.

[0011] As a further preferred embodiment of this solution, slide rail fixing blocks are provided at both ends of the slide rail. The slide rail fixing blocks serve to fix, support, and protect the internal structure.

[0012] As a further preferred embodiment of this solution, rubber rings are provided between both ends of the slide rail and the two slide rail fixing blocks. The rubber rings serve to limit the sliding range of the slider and buffer collisions.

[0013] As a further preferred embodiment of this solution, a mode switching switch is also provided on the back of the circuit board, protruding from the potentiometer housing. By operating the mode switching switch, the electrical signal output mode can be switched; in practical applications, according to the user's pre-configuration, the output mode can be on / off, linear, exponential, logarithmic, etc.

[0014] The beneficial effects achieved by this utility model are:

[0015] A novel contactless structure for a magnetically controlled sliding potentiometer used in stage audio equipment comprises a sliding magnet mechanism, a circuit board, and a magnetic induction sensor. During use, the sliding magnet mechanism is activated, and the magnetic induction sensor detects changes in the magnetic field. A microcontroller chip on the circuit board then converts the movement of the sliding magnet mechanism into a corresponding electrical signal change, thus achieving the function of a sliding potentiometer. Compared to existing sliding potentiometers that are susceptible to damage from unclean environments and prolonged use, this invention eliminates the contact structure of brushes and carbon films, effectively avoiding these effects and resulting in more stable performance. Attached Figure Description

[0016] Figure 1 This is a structural disassembly diagram of the magnetic induction type sliding potentiometer described in this embodiment of the utility model. Figure I ;

[0017] Figure 2 This is a structural disassembly diagram of the magnetic induction type sliding potentiometer described in this embodiment of the utility model. Figure II ;

[0018] In the diagram: 1. Potentiometer housing; 2. Strip-shaped through hole; 3. Push handle; 4. Slider; 5. Slide rail; 6. Guide rail; 7. Magnet; 8. Circuit board; 9. Slide rail fixing block; 10. Rubber ring; 11. Magnetic induction sensor; 12. Mode switching switch. Detailed Implementation

[0019] To clearly illustrate the solution in this utility model, further explanation is provided below with reference to the accompanying drawings:

[0020] Example 1

[0021] Please refer to Figure 1 and Figure 2 This embodiment provides a magnetic sliding potentiometer for stage audio equipment, including a potentiometer housing 1, a sliding magnet mechanism, a circuit board 8, and magnetic induction sensors 11. The potentiometer housing 1 is provided with a sliding magnet mechanism, and a circuit board 8 is provided on one side of the sliding magnet mechanism. The front of the circuit board 8 faces the sliding magnet mechanism, and a plurality of magnetic induction sensors 11 are evenly arranged on the back of the circuit board 8. A microcontroller chip is provided on the circuit board 8.

[0022] Specifically, in this embodiment:

[0023] The potentiometer housing 1 is a cuboid shape with one open side; a circuit board 8 is provided at the open side of the potentiometer housing 1, and the two ends of the circuit board 8 are respectively connected to the two inner sides of the potentiometer housing 1, with the front of the circuit board 8 facing the potentiometer housing 1.

[0024] A sliding magnet mechanism is provided between the circuit board 8 and the potentiometer housing 1. The sliding magnet mechanism includes a push handle 3, a sliding assembly, and a magnet 7. The push handle 3 is connected to the sliding assembly, and the magnet 7 is connected to the sliding assembly. The sliding assembly includes a slider 4, a slide rail 5, and a guide rail 6. The slider 4 slides through the slide rail 5 and is connected to the push handle 3. A guide rail 6 parallel to the slide rail 5 is provided on one side, and the push handle 3 is slidably connected to the guide rail 6. The magnet 7 is attached to the surface of the slider 4 and is close to the front of the circuit board 8. In addition, slide rail fixing blocks are provided at both ends of the slide rail 5 and the guide rail 6, and rubber rings 10 are provided between the two ends of the slide rail 5 and the two slide rail fixing blocks.

[0025] A strip-shaped through hole 2 is provided on the surface of the potentiometer housing 1, and the push handle 3 extends out from the strip-shaped through hole 2.

[0026] Four magnetic induction sensors 11 are evenly arranged on the back of the circuit board 8 (in other embodiments, the number may vary, and one of the criteria for selecting the number is the travel distance of the push handle), and the magnetic induction sensors 11 are preferably Hall sensors. In addition, a mode switching switch 12 is also provided on the back of the circuit board 8, and the mode switching switch 12 may be specifically selected as a button.

[0027] Based on the above structure, the working principle of this embodiment is as follows:

[0028] When the user pushes or pulls the push handle 3, it moves the slider 4 along the slide rail 5, which in turn moves the magnet 7. During this movement, the magnet 7 approaches, passes by, and moves away from the four magnetic induction sensors 11, allowing each sensor to detect changes in magnetic field strength and generate different magnetic induction signal intensities. The microcontroller chip on the circuit board 8 collects the magnetic induction signal intensities from the four sensors 11, determines the current position of the magnet 7, calculates the position of the slider 4 on the slide rail 5, and then calculates the travel distance of the push handle 3. This travel distance is then converted into a corresponding electrical signal change value for subsequent output, thus achieving the working effect of a sliding potentiometer. The output mode of the electrical signal can be switched using the operation mode switch 12.

[0029] In summary, the magnetic sliding potentiometer for stage audio equipment provided in this embodiment, by setting a novel contactless structure consisting of a sliding magnet mechanism, a circuit board 8, and a magnetic induction sensor 11, can convert the stroke variation of the sliding magnet mechanism into a corresponding electrical signal change value. It is not easily affected by unclean operating environments and long operating times, and has more stable performance.

[0030] It should be noted that the parts not described in detail or in an elaborate manner in the above solution are all prior art, not improvements made by this utility model to the prior art, nor are they within the protection scope of this utility model's technical solution. Therefore, they will not be elaborated upon in this article.

[0031] Of course, the above description is only a preferred embodiment of this utility model and should not be considered as limiting the scope of the embodiments of this utility model. This utility model is not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of this utility model should be included in the patent coverage of this utility model.

Claims

1. A magnetic induction type sliding potentiometer for stage sound equipment, characterized in that: The device includes a potentiometer housing (1), a sliding magnet mechanism, a circuit board (8), and a magnetic induction sensor (11). The potentiometer housing (1) is provided with a sliding magnet mechanism. A circuit board (8) is provided on one side of the sliding magnet mechanism. The front of the circuit board (8) faces the sliding magnet mechanism. Several magnetic induction sensors (11) are evenly arranged on the back of the circuit board (8). A microcontroller chip is provided on the circuit board (8). The slidable magnet mechanism includes a push handle (3), a sliding component and a magnet (7). The push handle (3) is connected to the sliding component, and the magnet (7) is connected to the sliding component. One side of the magnet (7) is the front of the circuit board (8). A strip-shaped through hole (2) is provided on the potentiometer housing (1), and the push handle (3) extends out from the strip-shaped through hole (2).

2. The magnetic induction type sliding potentiometer for stage sound equipment according to claim 1, characterized in that: The sliding assembly includes a slide rail (5) and a slider (4). The slider (4) is slidably disposed on the slide rail (5). The slider (4) is connected to the push handle (3). A magnet (7) is connected to the surface of the slider (4).

3. A magnetic induction type sliding potentiometer for stage sound equipment according to claim 2, characterized in that: The slide rail (5) has a guide rail (6) on one side that is parallel to the slide rail (5), and the push handle (3) is slidably connected to the guide rail (6).

4. A magnetic induction type sliding potentiometer for stage sound equipment according to claim 2, characterized in that: Both ends of the slide rail (5) are provided with slide rail fixing blocks.

5. A magnetic induction type sliding potentiometer for stage sound equipment according to claim 4, characterized in that: Rubber rings (10) are provided between both ends of the slide rail (5) and the two slide rail fixing blocks.

6. A magnetic induction type sliding potentiometer for stage sound equipment according to claim 1, characterized in that: The circuit board (8) is also provided with a mode switching switch (12) on the back side, which is exposed from the potentiometer housing (1).

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