CN220984269U - Electromagnetic induction type potentiometer assembly and rocker potentiometer - Google Patents

Abstract

The utility model discloses an electromagnetic induction type potentiometer assembly and a rocker potentiometer, wherein the electromagnetic induction type potentiometer assembly comprises a shell, a rotor, a rotating shaft, a permanent magnet and a magnetic induction circuit board; the rotor can rotate for the shell, and the right-hand member of shell seals the magnetic induction circuit board of moulding plastics, and the rotor is equipped with first through-hole and second cavity, and the core axle of changeing closely peg graft in first through-hole, and the core axle of changeing is equipped with the second through-hole that is used for receiving outside rotation output, and permanent magnet fixed mounting is in the second cavity, and the right side of permanent magnet is towards the magnetic induction module. The magnetic induction module is accurate in position on the shell and cannot change, so that induction accuracy is improved; when the rotor rotates in the forward direction or the reverse direction, the magnetic intensity of the permanent magnet at the position of the magnetic induction module can be linearly and gradually increased or gradually reduced; the position of the rotor in the first concave cavity of the shell can be finely adjusted, so that the position between the permanent magnet and the magnetic induction module can be finely adjusted.

Description

Electromagnetic induction type potentiometer assembly and rocker potentiometer

Technical Field

The utility model relates to the technical field of potentiometers, in particular to an electromagnetic induction potentiometer assembly and a rocker potentiometer.

Background

The rocker potentiometer is a variable potentiometer suitable for a rocker control handle of a game machine, an unmanned aerial vehicle and the like, and the control of state changes of internal related parts of the game machine, the unmanned aerial vehicle and the like is realized by rocking a rocker of the rocker potentiometer and then adjusting a resistance value through a brush mechanism of the potentiometer.

Referring to a chinese patent document CN218384665U, it discloses a rocker potentiometer with a centrally located slider, which includes a base, a slider, a rocker, a lower rocker, an upper rocker, an iron shell, a first potentiometer component and a second potentiometer component; the structure of the first potentiometer component and the second potentiometer component consists of a resistor body and a rotating or sliding system, namely, the resistor body moves by a movable contact to obtain partial voltage output, the potentiometer component adopts a carbon film or resistance wire structure, and contacts are required to be contacted with the carbon film for friction so as to realize detection of different positions of the potentiometer, and the potentiometer component has the following defects: the carbon film has short abrasion life and large production error; (2) Contact noise is generated when the position is changed due to friction of the junction contact. The electromagnetic induction type potentiometer overcomes the defects of the contact type potentiometer, uses a permanent magnet as a rotating or sliding part component, and uses a linear Hall sensor to detect the position of the permanent magnet in real time. When the electromagnetic induction potentiometer is used for adjusting the position, the electromagnetic induction potentiometer is contactless, abrasion-free and clutter interference during adjustment is avoided.

See chinese patent document CN215815437U, which discloses an electromagnetic induction potentiometer, comprising a housing, a rotor, a permanent magnet and a magnetic induction module; the shell is provided with a first cavity, the rotor is accommodated in the first cavity, and the rotor can rotate relative to the shell; the shell is provided with a second cavity, and the magnetic induction module is accommodated in the second cavity; the rotor is provided with a through hole for receiving external rotation input, the rotor is provided with a clamping piece, and the clamping piece is used for fixing the permanent magnet on the rotor. However, the above patent CN217210723U has problems: the first cavity of the shell can accommodate the magnetic induction module, but cannot accommodate the magnetic induction circuit board; because the magnetic induction module is usually packaged as an integrated circuit chip, and the integrated circuit chip needs to be welded on a circuit board, when the magnetic induction module is stored in the shell, the circuit board needs to be fixedly installed on other external mechanisms, and then the second cavity of the shell can be sleeved on the magnetic induction module of the circuit board, so that the installation mode is easy to ensure that the position between the circuit board and the shell is not accurate enough, the position of the magnetic induction module in the second cavity is easy to change slightly, and the induction accuracy of the electromagnetic induction potentiometer is reduced; thirdly, along with the rotation of the rotor, the distance between the permanent magnet and the magnetic induction module is continuously changed, the permanent magnet has an S pole and an N pole, and when the rotor rotates at a uniform speed in the forward direction or the reverse direction, the magnetic intensity of the permanent magnet at the position of the magnetic induction module is accelerated to be increased or accelerated to be reduced in a jumping type change phenomenon, so that the jumping type change phenomenon easily causes the problem that the induction signal of the electromagnetic induction potentiometer is changed too fast or too slow; fourth, the position of the rotor in the first cavity cannot be finely adjusted, so that the position between the permanent magnet and the magnetic induction module cannot be finely adjusted.

Disclosure of utility model

The utility model aims to solve the technical problems of the prior art, and provides an electromagnetic induction type potentiometer assembly, wherein a magnetic induction circuit board of the electromagnetic induction type potentiometer assembly is directly injection-molded and sealed by a shell, and the position of a magnetic induction module on the shell is accurate and cannot change, so that the induction accuracy of the electromagnetic induction type potentiometer assembly is improved; the axial distance between the permanent magnet of the electromagnetic induction potentiometer assembly and the magnetic induction module is not changed along with the rotation of the rotor, and when the rotor rotates in the forward direction or the reverse direction, the magnetic intensity of the permanent magnet at the position of the magnetic induction module is gradually increased or gradually reduced linearly, so that the synchronism between the change process of the induction signal of the electromagnetic induction potentiometer assembly and the rotation process of the rotor is maintained; the position of the rotor of the electromagnetic induction potentiometer assembly in the first concave cavity of the shell can be finely adjusted, so that the position between the permanent magnet and the magnetic induction module can be finely adjusted.

In order to solve the technical problems, the first technical scheme of the utility model is as follows: an electromagnetic induction potentiometer assembly comprises a shell, a rotor, a rotating shaft, a permanent magnet and a magnetic induction circuit board; the left side of the shell is provided with a first concave cavity, the rotor is accommodated in the first concave cavity, and the rotor can rotate relative to the shell; the right end of the shell is injection-molded to seal the magnetic induction circuit board, the lower end of the magnetic induction circuit board is connected with metal pins, the metal pins downwards extend out of the shell, a magnetic induction module is arranged on the magnetic induction circuit board, and the magnetic induction module faces into a first concave cavity on the left side of the shell; the rotor is provided with a first through hole and a second concave cavity, the rotating shaft is tightly inserted into the first through hole, the rotating shaft is provided with a second through hole for receiving external rotation output, the permanent magnet is fixedly arranged in the second concave cavity, the right side of the permanent magnet faces the magnetic induction module, and the axial distance between the permanent magnet and the magnetic induction module is not changed along with the rotation of the rotor.

Preferably, the first through hole of the rotor is a circular through hole, the side part of the circular through hole is provided with a through hole edging surface, the rotating shaft comprises a circular inserting part and an extending part, the side part of the circular inserting part is provided with an inserting part edging surface, the circular inserting part is tightly inserted into the circular through hole, the through hole edging surface is contacted with the inserting part edging surface, and the extending part extends out of the circular through hole.

Preferably, a first limiting surface is arranged at the bottom of the first concave cavity, and the right side surface of the extending part of the rotating shaft is in limiting fit with the first limiting surface; the lower extreme of first cavity is equipped with the arc stopper, the left side of arc stopper is equipped with the arc limiting surface, the lower extreme right flank of rotor with the arc limiting surface limit fit mutually.

Preferably, the second through hole of the rotating shaft is an in-line through hole or a rectangular through hole.

Preferably, a third through hole is formed at the right end of the housing, the third through hole is communicated between the first concave cavity and the magnetic induction circuit board, the magnetic induction module passes through the third through hole leftwards and extends into the first concave cavity, and the magnetic induction module is packaged into an integrated circuit chip.

Preferably, the second concave cavity is arranged at the lower end of the rotor, the right side of the second concave cavity is open, the permanent magnet is clamped into the second concave cavity from right to left, the second concave cavity and the permanent magnet are respectively rectangular, a magnet groove is arranged at the left side of the middle part between two magnetic poles of the permanent magnet, and a convex strip matched with the magnet groove is arranged in the second concave cavity.

Preferably, a plurality of shell positioning columns extending leftwards are arranged at four corners of the left side of the shell, and two positioning hooks extending leftwards are arranged in the middle of the left side of the shell.

Preferably, the electromagnetic induction potentiometer assembly further comprises an iron sheet, four corners of the iron sheet are connected with the housing positioning columns, a fourth through hole is formed in the middle of the iron sheet, and the fourth through hole corresponds to the first through hole of the rotor.

In order to solve the technical problems, the second technical scheme of the utility model is as follows: a rocker potentiometer comprises a base, a slide plate, a rocker, a lower rocker, an upper rocker, an iron shell, a first potentiometer component and a second potentiometer component; the base comprises a cavity, the sliding disc is arranged in the cavity of the base, the rocking bars are arranged on the sliding disc, the iron shell is arranged outside the base, the lower rocking bars and the upper rocking bars are respectively sleeved on the rocking bars, the upper rocking bars are positioned on the upper side of the lower rocking bars, and two ends of the lower rocking bars and the upper rocking bars respectively extend out of the iron shell and the base; the first potentiometer assembly and the second potentiometer assembly are respectively arranged on the iron shell, one end of the lower rocker arm is rotatably inserted into the second through hole of the rotating core shaft of the first potentiometer assembly, and one end of the upper rocker arm is rotatably inserted into the second through hole of the rotating core shaft of the second potentiometer assembly.

Preferably, the side part of the cavity of the base is connected with a plurality of guide feet, and the side part of the sliding plate is connected with guide strips which correspond to the guide feet and are in sliding fit with the guide feet; the middle part of the cavity of the base is provided with a vertical central rod, the middle part of the sliding plate is provided with a vertical central pipe, the central pipe is provided with a central hole which is vertically penetrated, and the central rod is inserted into the central hole of the central pipe upwards; the lower end of the rocker is provided with a rocker chassis which is in sliding fit with the upper side surface of the sliding disc, the lower side of the rocker chassis is provided with a spherical protruding part, and the spherical protruding part is positioned in the middle part above the middle hole; the upper end of the central rod is provided with a truncated cone-shaped protruding part, the upper end of the truncated cone-shaped protruding part is provided with a concave surface, and the spherical protruding part corresponds to the concave surface up and down; the lower rocker arm comprises a lower rocker arm main body and lower rocker arm rotating shafts connected to two ends of the lower rocker arm main body, and the lower rocker arm main body is arched upwards and movably sleeved on the rocker arm; the upper rocker arm comprises an upper rocker arm main body and upper rocker arm rotating shafts connected to two ends of the upper rocker arm main body, and the upper rocker arm main body is arched upwards and movably sleeved on the rocker arm; the ends of the lower rocker arm rotating shaft and the upper rocker arm rotating shaft are provided with a straight-line-shaped inserted link or a rectangular inserted link which is matched with the second through hole; a pin shaft is inserted between the lower rocker arm and the rocker arm, and the axial direction of the pin shaft is consistent with the axial direction of the rotating shaft of the upper rocker arm.

The beneficial effects of the utility model are as follows: the magnetic induction circuit board of the electromagnetic induction type potentiometer assembly is directly sealed at the right end of the shell by the shell in an injection molding way, and the structure ensures that the magnetic induction circuit board is directly and fixedly connected into the shell, so that the position of the magnetic induction module on the shell is accurate and cannot change, and the induction accuracy of the electromagnetic induction type potentiometer assembly is improved; the permanent magnet of the electromagnetic induction potentiometer assembly is fixedly arranged in the second concave cavity of the rotor, the right side of the permanent magnet faces the magnetic induction module, the axial distance between the permanent magnet and the magnetic induction module in the rotating shaft does not change along with the rotation of the rotor, and the structure ensures that the magnetic intensity of the permanent magnet in the position of the magnetic induction module is linearly and gradually increased or gradually reduced when the rotor and the rotating shaft rotate in the forward direction or the reverse direction, so that the synchronous performance is maintained between the change process of an induction signal of the electromagnetic induction potentiometer assembly and the rotation process of the rotor; the utility model adopts the mode of injection molding to seal the magnetic induction circuit board, thereby greatly improving the assembly efficiency of the magnetic induction circuit board and the shell and the connection and fixation accuracy; the rotor of the electromagnetic induction type potentiometer assembly is provided with the first through hole, the rotating mandrel is tightly inserted into the first through hole, the rotating mandrel is provided with the second through hole for receiving external rotation output, when the electromagnetic induction type potentiometer assembly is arranged on the rocker potentiometer, the rotor is positioned by an external device, and the rotating mandrel can be slightly rotated in a manner of pulling the rocker by force, so that the position of the rotor in the first concave cavity of the shell can be finely adjusted, and further, the position between the permanent magnet and the magnetic induction module can be finely adjusted.

Drawings

Fig. 1 is a diagram showing an overall structure of an electromagnetic induction type potentiometer assembly.

FIG. 2 is a second overall structure of the electromagnetic induction type potentiometer assembly.

Fig. 3 is a longitudinal sectional view of the electromagnetic induction type potentiometer assembly.

Fig. 4 is one of the decentralized block diagrams of the electromagnetic induction potentiometer assembly.

FIG. 5 is a second diagram of a distributed structure of an electromagnetic induction potentiometer assembly.

FIG. 6 is a third embodiment of a distributed structure of an electromagnetic induction potentiometer assembly.

Fig. 7 is an overall construction diagram of a preferred embodiment of an electromagnetic induction potentiometer assembly.

Fig. 8 is an overall structure diagram of the rocker potentiometer.

Fig. 9 is one of the dispersion structure diagrams of the rocker potentiometer.

FIG. 10 is a second diagram of a distributed structure of a rocker potentiometer.

Fig. 11 is a longitudinal sectional view of the rocking lever potentiometer.

Detailed Description

The structural and operational principles of the present utility model will be described in further detail below with reference to the accompanying drawings.

In the description of the present utility model with respect to the first potentiometer assembly and the second potentiometer assembly, it is to be understood that the terms "upper end", "lower end", "left side", "right side", "inner", "outer", etc. refer to an orientation or a positional relationship based on the orientation or the positional relationship shown in the drawings, in particular, the orientation or the positional relationship shown in fig. 3. The foregoing terminology is for the purpose of describing the utility model only and is not intended to indicate or imply that the device or element being referred to must be in a particular orientation, be constructed and operate in a particular orientation, and is therefore not to be construed as limiting the utility model.

As shown in fig. 1 to 6, the present utility model is an electromagnetic induction type potentiometer assembly, which comprises a housing 71, a rotor 72, a spindle 75, a permanent magnet 73 and a magnetic induction circuit board 74; a first concave cavity 711 is formed on the left side of the housing 71, the rotor 72 is accommodated in the first concave cavity 711, and the rotor 72 can rotate relative to the housing 71; the right end of the housing 71 is injection-molded to seal the magnetic induction circuit board 74, the lower end of the magnetic induction circuit board 74 is connected with a metal pin 742, the metal pin 742 extends downwards out of the housing 71, a magnetic induction module 741 is arranged on the magnetic induction circuit board 74, and the magnetic induction module 741 faces into a first concave cavity 711 on the left side of the housing 71; the rotor 72 is provided with a first through hole 721 and a second cavity 722, the spindle 75 is tightly inserted into the first through hole 721, the spindle 75 is provided with a second through hole 751 for receiving external rotation output, the permanent magnet 73 is fixedly arranged in the second cavity 722, the right side of the permanent magnet 73 faces the magnetic induction module 741, and the distance between the permanent magnet 73 and the magnetic induction module 741 in the spindle axial direction is not changed along with the rotation of the rotor 72.

The magnetic induction circuit board 74 of the electromagnetic induction type potentiometer assembly is directly sealed at the right end of the shell 71 by the shell through injection molding, and the structure ensures that the magnetic induction circuit board 74 is directly and fixedly connected into the shell 71, the position of the magnetic induction module 741 on the shell 71 is accurate and cannot change, so that the induction accuracy of the electromagnetic induction type potentiometer assembly is improved; the permanent magnet 73 of the electromagnetic induction potentiometer assembly is fixedly arranged in the second concave cavity 722 of the rotor 72, the right side of the permanent magnet 73 faces the magnetic induction module 741, and the axial distance between the permanent magnet 73 and the magnetic induction module 741 in the rotating shaft 75 is not changed along with the rotation of the rotor 72, so that the magnetic intensity of the permanent magnet 73 at the position of the magnetic induction module 741 is linearly and gradually increased or gradually reduced when the rotor 72 and the rotating shaft 75 rotate in the forward direction or the reverse direction, and the synchronous performance is kept between the change process of the induction signal of the electromagnetic induction potentiometer assembly and the rotation process of the rotor; the utility model adopts the mode of injection molding to seal the magnetic induction circuit board 741, thereby greatly improving the assembly efficiency and the connection fixing accuracy of the magnetic induction circuit board 741 and the shell 71; the rotor 72 of the electromagnetic induction potentiometer assembly is provided with a first through hole 721, the rotating core shaft 75 is tightly inserted into the first through hole 721, the rotating core shaft 75 is provided with a second through hole 751 for receiving external rotation output, when the electromagnetic induction potentiometer assembly is installed on a rocker potentiometer, the rotor is positioned by an external device, and the position of the rotor 72 in the first concave cavity 711 of the shell 71 can be finely adjusted by finely rotating the rotating core shaft 751 in a force pulling manner, so that the position between the permanent magnet 73 and the magnetic induction module 751 can be finely adjusted.

As shown in fig. 1-6, the first through hole 721 of the rotor 72 is a circular through hole, a through hole chamfered surface 7211 is provided at a side portion of the circular through hole, the rotating shaft 75 includes a circular insertion portion 752 and an extension portion 753, a insertion portion chamfered surface 7521 is provided at a side portion of the circular insertion portion 752, the circular insertion portion 752 is tightly inserted into the circular through hole, the through hole chamfered surface 7211 is in contact with the insertion portion chamfered surface 7521, and the extension portion 753 extends out of the circular through hole.

As shown in fig. 1-6, a first limiting surface 7111 is provided at the bottom of the first cavity 711, and the right side surface of the protruding portion 753 of the rotating shaft 75 is in limiting fit with the first limiting surface 7111; the lower end of the first cavity 711 is provided with an arc-shaped limiting block 7112, the left side of the arc-shaped limiting block 7112 is provided with an arc-shaped limiting surface 7113, and the right side surface of the lower end of the rotor 72 is in limit fit with the arc-shaped limiting surface 7113.

As shown in fig. 1-6, the second through hole 751 of the spindle 75 is a "in-line" through hole or a rectangular through hole.

As shown in fig. 1-6, a third through hole 713 is disposed at the right end of the housing 71, the third through hole 713 is connected between the first cavity 711 and the magnetic induction circuit board 74, the magnetic induction module 741 passes through the third through hole 713 to the left and extends into the first cavity 711, and the magnetic induction module 741 is packaged as an integrated circuit chip. The third through hole 713 is provided, so that no obstruction exists between the magnetic induction module 741 and the permanent magnet 73, and the magnetic induction module 741 directly faces the permanent magnet 73.

As shown in fig. 1-6, the second cavity 722 is disposed at the lower end of the rotor 72, the right side of the second cavity 722 is open, the permanent magnet 73 is clamped into the second cavity 722 from right to left, the shapes of the second cavity 722 and the permanent magnet 73 are respectively rectangular, a magnet slot 731 is disposed at the left side of the middle between the two magnetic poles of the permanent magnet 73, and the second cavity 722 is provided with a raised strip 7222 matched with the magnet slot 731. The magnet grooves 731 are provided to distinguish two poles of the magnet, i.e., the S pole and the N pole, on the one hand, and to stabilize the magnetism of the S pole and the N pole after magnetizing on the other hand.

As shown in fig. 1-6, a plurality of left-extending housing positioning posts 716 are disposed at four corners of the left side of the housing 71, and two left-extending positioning hooks 717 are disposed at the middle of the left side of the housing 71.

As shown in fig. 7, the electromagnetic induction potentiometer assembly further includes an iron sheet 76, four corners of the iron sheet 76 are connected to the housing positioning posts 716, a fourth through hole 761 is provided in the middle of the iron sheet 76, and the fourth through hole 761 corresponds to the first through hole 721 of the rotor 72. When the electromagnetic induction type potentiometer assembly is provided with the iron sheet 76, the electromagnetic induction type potentiometer assembly can be used as a single potentiometer; when the electromagnetic induction type potentiometer assembly is not provided with the iron sheet 76, the electromagnetic induction type potentiometer assembly is generally used in combination with a rocker potentiometer.

As shown in fig. 8-11, referring to fig. 1-6 in combination, a rocker potentiometer comprises a base 1, a slide plate 2, a rocker 3, a lower rocker 4, an upper rocker 5, an iron shell 6, a first potentiometer assembly 7 and a second potentiometer assembly 8; the base 1 comprises a cavity 11, the slide plate 2 is arranged in the cavity 11 of the base, the rocker 3 is arranged on the slide plate 2, the iron shell 6 is arranged outside the base 1, the lower rocker 4 and the upper rocker 5 are respectively sleeved on the rocker 3, the upper rocker 5 is positioned on the upper side of the lower rocker 4, and two ends of the lower rocker 4 and the upper rocker 5 respectively extend out of the iron shell 6 and the base 1; the first potentiometer assembly 7 and the second potentiometer assembly 8 are respectively the electromagnetic induction potentiometer assemblies, the first potentiometer assembly 7 and the second potentiometer assembly 8 are respectively arranged on the iron shell 6, one end of the lower rocker arm 4 is rotatably inserted into the second through hole 751 of the rotating core shaft 75 of the first potentiometer assembly 7, and one end of the upper rocker arm 5 is rotatably inserted into the second through hole 751 of the rotating core shaft 75 of the second potentiometer assembly 8.

As shown in fig. 8-11, the side part of the cavity of the base is connected with a plurality of guide feet, and the side part of the sliding disc is connected with guide strips which correspond to the guide feet and are in sliding fit with the guide feet; the middle part of the cavity of the base is provided with a vertical central rod, the middle part of the slide plate is provided with a vertical central tube, the central tube is provided with a central hole which is vertically penetrated, and the central rod is inserted into the central hole of the central tube upwards. The slide plate 2 of the utility model can be positioned at the side part with the guide feet 12 of the base 1 through the guide strip 21 at the side part; the slide plate 2 can be used for carrying out center positioning through the center tube 22 and the center rod 13 of the base 1, and has accurate center positioning and high resetting accuracy.

As shown in fig. 8-11, the lower end of the rocker 3 is provided with a rocker chassis 31, the rocker chassis 31 is in sliding fit with the upper side surface of the slide plate 2, the lower side of the rocker chassis 31 is provided with a spherical protruding part 311, and the spherical protruding part 311 is positioned in the middle part above the middle hole 221; the upper end of the center rod 13 is provided with a truncated cone-shaped protruding portion 131, the upper end of the truncated cone-shaped protruding portion 131 is provided with a concave surface 132, and the spherical protruding portion 311 corresponds to the concave surface 132 vertically.

As shown in fig. 8-11, referring to fig. 1-6, the lower rocker arm 4 includes a lower rocker arm main body and lower rocker arm rotating shafts 41 connected to two ends of the lower rocker arm main body, and the lower rocker arm main body arches upwards and is movably sleeved on the rocker arm 3; the upper rocker arm 5 comprises an upper rocker arm main body and upper rocker arm rotating shafts 51 connected to two ends of the upper rocker arm main body, and the upper rocker arm main body is arched upwards and movably sleeved on the rocker arm 3; the ends of the lower rocker arm rotating shaft 41 and the upper rocker arm rotating shaft 51 are provided with a straight-line-shaped inserted bar or a rectangular inserted bar 411 and 511 which are matched with the second through holes 751; a pin shaft 10 is inserted between the lower rocker arm 4 and the rocker arm 3, and the axial direction of the pin shaft 10 is consistent with the axial direction of the upper rocker arm rotating shaft 51.

As shown in fig. 8-11, the rocker potentiometer further comprises a spring 9, a first spring seat 14 is arranged in the cavity 11 of the base 1, a second spring seat 23 is arranged at the lower end of the sliding plate 2, the lower end of the spring 9 is mounted on the first spring seat 14, and the upper end of the spring 9 is mounted below the second spring seat 23; the inner wall of the guide leg 12 is provided with a guide groove 121, and the guide groove 121 of at least one guide leg 12 is provided with a limiting mechanism for limiting the sliding end position of the guide bar.

In the foregoing, only the preferred embodiment of the present utility model is described, and any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical solutions of the present utility model fall within the scope of the technical solutions of the present utility model.

Claims (10)

1. An electromagnetic induction type potentiometer assembly, which is characterized in that: the magnetic induction motor comprises a shell, a rotor, a rotating shaft, a permanent magnet and a magnetic induction circuit board; the left side of the shell is provided with a first concave cavity, the rotor is accommodated in the first concave cavity, and the rotor can rotate relative to the shell; the right end of the shell is injection-molded to seal the magnetic induction circuit board, the lower end of the magnetic induction circuit board is connected with metal pins, the metal pins downwards extend out of the shell, a magnetic induction module is arranged on the magnetic induction circuit board, and the magnetic induction module faces into a first concave cavity on the left side of the shell; the rotor is provided with a first through hole and a second concave cavity, the rotating shaft is tightly inserted into the first through hole, the rotating shaft is provided with a second through hole for receiving external rotation output, the permanent magnet is fixedly arranged in the second concave cavity, the right side of the permanent magnet faces the magnetic induction module, and the axial distance between the permanent magnet and the magnetic induction module is not changed along with the rotation of the rotor.

2. The electromagnetic induction potentiometer assembly according to claim 1, wherein: the first through hole of rotor is circular through hole, and the lateral part of circular through hole has the through hole edging face, the commentaries on classics dabber includes circular grafting portion and extension, and the lateral part of circular grafting portion has grafting portion edging face, circular grafting portion closely peg graft in circular through hole, and through hole edging face and grafting portion edging face contact, extension stretches out outside the circular through hole.

3. The electromagnetic induction potentiometer assembly according to claim 2, wherein: the bottom of the first concave cavity is provided with a first limiting surface, and the right side surface of the extending part of the rotating core shaft is in limiting fit with the first limiting surface; the lower extreme of first cavity is equipped with the arc stopper, the left side of arc stopper is equipped with the arc limiting surface, the lower extreme right flank of rotor with the arc limiting surface limit fit mutually.

4. The electromagnetic induction potentiometer assembly according to claim 1, wherein: the second through hole of the rotating shaft is a straight-line-shaped through hole or a rectangular through hole.

5. The electromagnetic induction potentiometer assembly according to claim 1, wherein: the right end of the shell is provided with a third through hole, the third through hole is communicated between the first concave cavity and the magnetic induction circuit board, the magnetic induction module passes through the third through hole leftwards and stretches into the first concave cavity, and the magnetic induction module is packaged into an integrated circuit chip.

6. The electromagnetic induction potentiometer assembly according to claim 1, wherein: the second concave cavity is arranged at the lower end of the rotor, the right side of the second concave cavity is open, the permanent magnet is clamped into the second concave cavity from right to left, the second concave cavity and the permanent magnet are respectively rectangular, a magnet groove is formed in the left side of the middle between two magnetic poles of the permanent magnet, and a convex strip matched with the magnet groove is arranged in the second concave cavity.

7. The electromagnetic induction potentiometer assembly according to claim 1, wherein: the left side four corners position of shell is equipped with a plurality of shell reference column that stretches out to left, and the left side middle part of shell is equipped with two location pothooks that stretch out to left.

8. The electromagnetic induction potentiometer assembly according to claim 7, wherein: the electromagnetic induction type potentiometer assembly further comprises an iron sheet, four corners of the iron sheet are connected with the positioning columns of the shell, a fourth through hole is formed in the middle of the iron sheet, and the fourth through hole corresponds to the first through hole of the rotor.

9. A rocker potentiometer, characterized in that: the device comprises a base, a sliding disc, a rocker, a lower rocker, an upper rocker, an iron shell, a first potentiometer assembly and a second potentiometer assembly; the base comprises a cavity, the sliding disc is arranged in the cavity of the base, the rocking bars are arranged on the sliding disc, the iron shell is arranged outside the base, the lower rocking bars and the upper rocking bars are respectively sleeved on the rocking bars, the upper rocking bars are positioned on the upper side of the lower rocking bars, and two ends of the lower rocking bars and the upper rocking bars respectively extend out of the iron shell and the base; the first potentiometer component and the second potentiometer component are respectively the electromagnetic induction potentiometer component as claimed in any one of claims 1-7, the first potentiometer component and the second potentiometer component are respectively arranged on the iron shell, one end of the lower rocker arm is rotatably inserted into the second through hole of the rotating core shaft of the first potentiometer component, and one end of the upper rocker arm is rotatably inserted into the second through hole of the rotating core shaft of the second potentiometer component.

10. The rocker potentiometer according to claim 9, wherein: the side part of the cavity of the base is connected with a plurality of guide pins, and the side part of the sliding plate is connected with guide strips which correspond to the guide pins and are in sliding fit; the middle part of the cavity of the base is provided with a vertical central rod, the middle part of the sliding plate is provided with a vertical central pipe, the central pipe is provided with a central hole which is vertically penetrated, and the central rod is inserted into the central hole of the central pipe upwards; the lower end of the rocker is provided with a rocker chassis which is in sliding fit with the upper side surface of the sliding disc, the lower side of the rocker chassis is provided with a spherical protruding part, and the spherical protruding part is positioned in the middle part above the middle hole; the upper end of the central rod is provided with a truncated cone-shaped protruding part, the upper end of the truncated cone-shaped protruding part is provided with a concave surface, and the spherical protruding part corresponds to the concave surface up and down; the lower rocker arm comprises a lower rocker arm main body and lower rocker arm rotating shafts connected to two ends of the lower rocker arm main body, and the lower rocker arm main body is arched upwards and movably sleeved on the rocker arm; the upper rocker arm comprises an upper rocker arm main body and upper rocker arm rotating shafts connected to two ends of the upper rocker arm main body, and the upper rocker arm main body is arched upwards and movably sleeved on the rocker arm; the ends of the lower rocker arm rotating shaft and the upper rocker arm rotating shaft are provided with a straight-line-shaped inserted link or a rectangular inserted link which is matched with the second through hole; a pin shaft is inserted between the lower rocker arm and the rocker arm, and the axial direction of the pin shaft is consistent with the axial direction of the rotating shaft of the upper rocker arm.