Magnetic induction type sliding potentiometer

Abstract

The utility model relates to the field of sliding potentiometers, in particular to a magnetic induction type sliding potentiometer. The sliding potentiometer comprises a PCB (printed circuit board) with a plurality of magnetic induction chips, and further comprises a fixed support, a sliding block and a magnet, the fixed support is mounted on the PCB, the sliding block slides along the length direction of the fixed support, the magnet is arranged at the bottom of the sliding block, and the magnetic induction chips are arranged on the fixed support. And the sliding block with the magnet moves along the arrangement direction of the magnetic induction chips in the fixed bracket. The feedback of the product is much faster than that of a resistance type, the precision is higher, and the product is simple in structure, easy to assemble, good in hand feeling and adjustable.

Description

Technical Field

[0001] The utility model relates to the field of sliding potentiometers, in particular to a magnetic induction sliding potentiometer. Background Art

[0002] Some of the existing sliding potentiometers are resistor type, and some are carbon film type. Because these types of modules need to calculate the moving distance through the change of resistance, the main defects are:

[0003] (1) Slow response and long feedback time;

[0004] (2) The structure is too simple and the sliding feel is poor;

[0005] (3) There are no parts that enhance the feel, such as adding damping oil. Utility Model Content

[0006] 1. Technical issues to be solved

[0007] In view of the deficiencies in the prior art, the utility model provides a magnetic induction sliding potentiometer, which optimizes the feel of the device, so that the feel and control are superior to previous sliding potentiometers.

[0008] (II) Technical solution

[0009] A magnetic induction sliding potentiometer comprises a PCB board with a plurality of magnetic induction chips, and further comprises a fixed bracket, a sliding block and a magnet. The fixed bracket is mounted on the PCB board, the sliding block slides and moves along the long direction of the fixed bracket, a magnet is arranged at the bottom of the sliding block, and the sliding block with the magnet moves along the arrangement direction of the magnetic induction chips in the fixed bracket.

[0010] Preferably, there are three magnetic induction chips, which are arranged along the inner length direction of the fixed bracket.

[0011] Preferably, the PCB board is fixed to the fixing bracket via fixing holes, and the fixing bracket is aligned with the positioning holes on the PCB board via positioning columns at the bottom.

[0012] Preferably, the fixed bracket is provided with sliding grooves on both sides along the length direction, and sliding shafts are provided on both sides of the sliding block, and the sliding shafts translate along the sliding grooves.

[0013] Preferably, the sliding shaft is made of stainless steel.

[0014] Preferably, an adjustment slot is provided at the top of the fixed bracket along the length direction, and a push rod is provided at the top of the sliding block, and the push rod translates along the adjustment slot.

[0015] Preferably, damping oil grooves are provided on both sides of the sliding block close to the fixed bracket.

[0016] Preferably, the slide groove is a long waist hole in the shape of a runway.

[0017] Preferably, the distance between the surface of the magnetic induction chip and the surface of the magnet is at least 5.75 mm.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the utility model provides a new type of magnetic induction sliding potentiometer. The feedback of this product is much faster than that of the resistance type, the precision is also higher, the product structure is simple and easy to assemble, the hand feel is good and it is adjustable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of this product;

[0021] Figure 2 This is a structural diagram of the PCB board with a magnetic induction chip for this product;

[0022] Figure 3 This is a schematic diagram of the structure of the fixed bracket of this product;

[0023] Figure 4 for Figure 3 A view from another angle;

[0024] Figure 5 This is a schematic diagram of the structure of the sliding block of this product;

[0025] Figure 6 This is a structural diagram of the fixed bracket combined with the sliding block of this product.

[0026] Description of reference numerals: magnetic induction chip 1, PCB board 2, fixing hole 21, positioning hole 22, fixing bracket 3, positioning column 31, sliding groove 32, adjusting groove 33, sliding block 4, sliding shaft 41, push rod 42, damping oil groove 43, magnet 5. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings, wherein the same components are represented by the same figure numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower", "bottom surface" and "top surface" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Design concept: Design a sliding potentiometer that integrates the magnetic sensing chip and the PCB board that fixes the magnetic sensing chip into the sliding structure, and it needs to have a damping feel.

[0030] Example:

[0031] like Figure 1-Figure 6 As shown, the technical solution provided by the utility model is a magnetic induction sliding potentiometer, including a PCB board 2 with a plurality of magnetic induction chips 1, and further including a fixed bracket 3, a sliding block 4 and a magnet 5. The fixed bracket 3 is installed on the PCB board 2, and the sliding block 4 slides and moves along the long direction of the fixed bracket 3. The magnetic induction chip 1 has three pieces and is arranged along the inner long direction of the fixed bracket 3. More specifically, the magnetic induction chip 1 is three KTH5701 chips, and the surface of the chip is 5.75mm away from the surface of the magnet 5. A magnet 5 is provided at the bottom of the sliding block 4. The magnet 5 can be adjusted to different sizes and different brands as needed. The N54 ideal magnet used in this embodiment has a length of 10mm, a width of 10mm, and a thickness of 2.5mm. The sliding block 4 with the magnet 5 moves along the arrangement direction of the magnetic induction chip 1 in the fixed bracket 3.

[0032] In this embodiment, the PCB board 2 and the fixing bracket 3 are fixed via the fixing holes 21 , and the fixing bracket 3 is precisely aligned with the positioning holes 22 on the PCB board 2 via the positioning columns 31 at the bottom.

[0033] The fixed bracket 3 of this embodiment has slide grooves 32 on both sides along the long direction. The slide grooves 32 are long waist holes in the shape of a runway or other forms of slide grooves, such as embedded grooves. Sliding shafts 41 are provided on both sides of the sliding block 4. The sliding shafts 41 translate along the slide grooves 32. The sliding shafts 41 are made of stainless steel.

[0034] In this embodiment, the top of the fixed bracket 3 is provided with an adjustment slot 33 along the longitudinal direction, and the top of the sliding block 4 is provided with a push rod 42, which moves along the adjustment slot 33, and a variety of push rod caps can be compatible with the push rod 42. Furthermore, the sliding block 4 is provided with damping oil grooves 43 on both sides close to the fixed bracket 3.

[0035] Working principle description:

[0036] like Figure 2 As shown, in order to achieve higher accuracy, the magnetic induction chips 1 of this product are three. Figure 3 , Figure 4 As shown, the fixed bracket 3 has two functions, one is to provide a slide groove 32 for the magnet 5 to slide, and the other is to provide connection fixation and maintain relative accuracy. The fixed bracket 3 has two positioning PINs (i.e., positioning columns 31), which can ensure a relatively accurate relative position when connected to the PCB board 2. There are four threaded holes on the fixed bracket 3, and the screws can be screwed upward from the bottom of the PCB board 2, so that the fixed bracket 3 can be connected to the PCB board 2 assembly. Because the slide groove 32 on the fixed bracket 3 has different lengths, it corresponds to different strokes. The stroke of this product is in the range of 40MM to 45MM.

[0037] The sliding part of this product consists of two stainless steel sliding shafts 41 that match the sliding groove 32. The stainless steel sliding shaft 41 is not easily magnetized by the magnet 5, which affects the magnetism of the magnet 5. The sliding block 4 has a damping oil groove 43 for placing damping oil. When installing the sliding block 4 and the fixed bracket 3, first apply damping oil, then place the sliding block 4 in the corresponding position, put on the stainless steel sliding shaft 41 to complete the fixation, and the stainless steel sliding shaft 41 can be fixed to the sliding block 4 by dispensing glue. The sliding block 4 and the fixed bracket 3 form a small sealed cavity at the damping oil groove 43. Although they slide relative to each other, the damping oil will not leak. Here, the stable damping oil is used to provide a sliding feel. The amount of damping oil can be more or less, and the process is optimized to change and optimize different feels.

[0038] During the movement of the slider 4 adjusting the magnet 5, the change of magnetic induction intensity at the center of the magnetic induction chip 1 and the chip output angle can be measured. In the actual test, only one chip magnet 5, KTH5701_#2, was used in the movement stroke, and the system error of the calculated position was about ±2mm; when three chip magnets 5, KTH5701_#1, 2, and 3, were used in the movement stroke, the system error of the calculated position was about ±0.06mm.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A magnetic induction sliding potentiometer, comprising a PCB board with a plurality of magnetic induction chips, characterized in that: It also includes a fixed bracket, a sliding block and a magnet. The fixed bracket is installed on the PCB board. The sliding block slides and moves along the long direction of the fixed bracket. A magnet is provided at the bottom of the sliding block. The sliding block with the magnet moves along the arrangement direction of the magnetic induction chip in the fixed bracket.

2. A magnetic induction sliding potentiometer according to claim 1, characterized in that: There are three magnetic induction chips, which are arranged along the inner length direction of the fixed bracket.

3. A magnetic induction sliding potentiometer according to claim 1, characterized in that: The PCB board is fixed to the fixing bracket through the fixing holes, and the fixing bracket is aligned with the positioning holes on the PCB board through the positioning columns at the bottom.

4. A magnetic induction sliding potentiometer according to claim 1, characterized in that: The fixed bracket is provided with sliding grooves on both sides along the length direction, and sliding shafts are provided on both sides of the sliding block, and the sliding shafts translate along the sliding grooves.

5. A magnetic induction sliding potentiometer according to claim 4, characterized in that: The sliding shaft is made of stainless steel.

6. A magnetic induction sliding potentiometer according to claim 1, characterized in that: The top of the fixed bracket along the long direction is provided with an adjusting groove, and the top of the sliding block is provided with a push rod, which moves horizontally along the adjusting groove.

7. The magnetic induction sliding potentiometer according to claim 1, characterized in that: Damping oil grooves are arranged on both sides of the sliding block close to the fixed bracket.

8. The magnetic induction sliding potentiometer according to claim 4, characterized in that: The chute is a long waist hole in the shape of a runway.

9. The magnetic induction sliding potentiometer according to claim 1, characterized in that: The shortest distance between the surface of the magnetic induction chip and the surface of the magnet is 5.75 mm.

Images