阅读说明：本技术 一种电位器 (Potentiometer ) 是由 张宇阳 于 2019-10-30 设计创作，主要内容包括：本发明公开了一种电位器，包括活动块、基体块和电位调节结构，活动块嵌入在基体块上，活动块上设有电位调节结构，活动块上远离电位调节结构的部分嵌入有导磁吸块结构，导磁吸块结构伸出活动块的端部吸附有导磁片，导磁片嵌入并紧固在基体块上，而基体块上对应电位调节结构设有霍尔元件，也就实现活动块相对基体块活动，电位调节结构与霍尔元件之间的位置关系发生变化，使得霍尔元件受周围磁场发生变化的影响而产生相应的霍尔电势变化。本发明利用基体块上电位调节结构与线性霍尔元件之间位置关系产生变化，实现无级或有档位的霍尔电势调节，可调节性好，且导磁吸块结构在磨损后还能够与导磁片磁性吸附在一起，使用寿命长，稳定性好。(The invention discloses a potentiometer, which comprises a movable block, a base block and a potential adjusting structure, wherein the movable block is embedded in the base block, the movable block is provided with the potential adjusting structure, the part of the movable block, which is far away from the potential adjusting structure, is embedded with a magnetic conducting suction block structure, the end part of the magnetic conducting suction block structure, which extends out of the movable block, is adsorbed with a magnetic conducting sheet, the magnetic conducting sheet is embedded and fastened on the base block, the base block is provided with a Hall element corresponding to the potential adjusting structure, so that the movable block moves relative to the base block, and the position relation between the potential adjusting structure and the Hall element is changed, so that the Hall element is influenced by the change of a surrounding magnetic field to generate corresponding Hall potential change. The invention realizes stepless or geared Hall potential adjustment by utilizing the change of the position relation between the potential adjusting structure on the substrate block and the linear Hall element, has good adjustability, can be magnetically adsorbed with the magnetic conductive sheet after the magnetic conductive sucker structure is worn, and has long service life and good stability.)

1. The potentiometer comprises a movable block, a base block and a potential adjusting structure, wherein the movable block is embedded in the base block, and the potential adjusting structure is arranged between the movable block and the base block, and is characterized in that: the part of keeping away from the potential adjustment structure on the movable block is embedded with the magnetic conduction and inhales the block structure, the end that the block structure stretches out the movable block of magnetic conduction adsorbs has the magnetic conduction piece, the magnetic conduction piece embedding is fastened on the base block for the block structure is inhaled with the magnetic conduction piece magnetism and is produced the resistance that hinders the movable block relative base block activity together, and the potential adjustment structure produces adjustable potential variation.

2. A potentiometer according to claim 1, wherein: the magnetic conduction is inhaled the block structure and is included non-magnetic conduction spacer block, magnetic force generation piece and magnetic conduction lateral plate, non-magnetic conduction spacer block supports and leans on the magnetic conduction piece, the tip of keeping away from the magnetic conduction piece on the non-magnetic conduction spacer block presses and has the magnetic force generation piece, the both sides of magnetic force generation piece and non-magnetic conduction spacer block are fixed with the magnetic conduction lateral plate respectively, the tip that the magnetic conduction lateral plate is close to the magnetic conduction piece supports and leans on the magnetic conduction lateral plate for two magnetic pole ends of magnetic force generation piece support respectively and lean on and inhale mutually through magnetic conduction lateral plate and magnetic conduction piece magnetism.

3. A potentiometer according to claim 2, wherein: the potential adjusting structure is a magnetic generating block capable of generating magnetism, a Hall element socket capable of being embedded with a Hall element is arranged on the part, close to the potential adjusting structure, of the base block, so that the movable block moves relative to the base block in the state that the Hall element is embedded into the Hall element socket, the position relation between the potential adjusting structure and the Hall element changes, and the Hall element is influenced by the change of a surrounding magnetic field to generate corresponding Hall potential change.

4. A potentiometer according to claim 3, wherein: the movable block is of a rectangular block structure and is embedded in the inner cavity of the base block, the inner cavity of the base block is of a rectangular structure, a poking long hole communicated with the outside is formed in the center of the upper end of the inner cavity of the base block, a poking block penetrates through the poking long hole, the lower end of the poking block extends into the inner cavity of the base block, and the lower end of the poking block is fixedly arranged on the movable block, so that the movable block moves back and forth in the inner cavity of the base block under the condition that the poking block moves back and forth along the poking.

5. A potentiometer according to claim 4, wherein: the utility model discloses a resistance that the movable block removed in the inner chamber of base member piece is inhaled to magnetic conduction, the movable block both ends are equipped with the potential adjustment structure of vertical embedding and the magnetic conduction of horizontal embedding respectively around, correspond the potential adjustment structure on the base member block and be equipped with hall element socket at the front end, it inhales the block structure rear end downside to be equipped with the magnetic conduction piece to correspond the magnetic conduction on the base member block for the magnetic conduction inhales the resistance that the block structure and the magnetic conduction piece's magnetic adsorption effect hindered the movable block and removed in the inner chamber.

6. A potentiometer according to claim 3, wherein: the movable block is a fan-shaped block structure, the left side and the right side of the movable block are respectively provided with hinged bulges, and the hinged bulges extend in opposite directions respectively and are embedded into and hinged on the base block, so that the movable block swings relative to the base block by taking the two hinged bulges as a rotation center.

7. A potentiometer according to claim 6, wherein: the movable block is embedded into the front end and the rear end in the base block and is transversely embedded with an electric potential adjusting structure and a magnetic conductive suction block structure respectively, a Hall element socket with a downward opening is arranged at the front end of the base block corresponding to the electric potential adjusting structure, and a magnetic conductive sheet is arranged on the right side of the rear end of the base block corresponding to the magnetic conductive suction block structure, so that the magnetic conductive suction block structure is always adsorbed together with the magnetic conductive sheet in the swinging process of the movable block relative to the base block.

8. A potentiometer according to claim 6, wherein: the upper and lower two parts of movable block embedding in the base member piece transversely imbed respectively and have potential control structure and magnetic conduction to inhale the block structure, it is equipped with hall element socket down to correspond the potential control structure at the front end on the base member piece, the lower extreme of movable block is the arc curved surface form that the centre of a circle is in two articulated protruding central lines, it is equipped with the magnetic conduction piece that is arc sheet structure to correspond magnetic conduction block structure on the base member piece bottom for the relative base member piece swing in-process magnetic conduction of movable block inhales the block structure and is in the same place with magnetic conduction piece magnetic adsorption all the time.

9. A potentiometer according to claim 8, wherein: two the both ends of articulated arch for embedding and fixing the pivot on the movable block, and two the bellied one end of articulated extends and stretches out the base member block to the direction of keeping away from the activity, the fixed runner that is provided with of tip that the articulated arch stretches out the base member block for rotate the runner that is located outside the base member block, the movable block swings in the base member block.

10. A potentiometer according to any of claims 1-9, wherein: the magnetic conduction pieces are respectively provided with gear holes corresponding to the shapes and the intervals of the two magnetic conduction side pieces, so that under the condition that the movable block moves to a certain position relative to the base block, the two magnetic conduction side pieces respectively correspond to the gear holes and the projections of the two magnetic conduction side pieces to the magnetic conduction pieces are respectively superposed with the corresponding gear holes, a certain gear is formed in the movable block in the process of moving relative to the base block, and the influence of a potential adjusting structure on the Hall element is convenient to control.

11. A potentiometer according to claim 1, wherein: the electric potential adjusting structure is a resistance-type electric potential adjusting structure capable of generating resistance change, so that the resistance-type electric potential adjusting structure generates dislocation in the resistance-type electric potential adjusting structure along with relative sliding between the sliding block and the base body block, and stepless or gear-position electric potential adjustment is realized.

12. A potentiometer according to claim 11, wherein: the resistance type potential adjusting structure comprises a sliding wiring end, a sliding groove, a fixed wiring end, a resistance sheet and a sliding sheet, the substrate block is a first outer sleeve block, the movable block is a sliding block, the resistance sheet is embedded in the right end of the bottom in the first outer sleeve block, the lower side of the right end is provided with the fixed wiring end extending out of the first outer sleeve block, the sliding sheet is embedded in the right end of the sliding block, the lower end of the sliding sheet extends out of the lower end of the sliding block, and the sliding sheet is in contact with the resistance sheet along with the sliding of the sliding block rightward in the first outer sleeve block, so that the resistance is adjusted from; and the sliding sheet is provided with a sliding wiring end, in order to adapt to the sliding of the sliding sheet along with the first outer sleeve block, the side wall of the first outer sleeve block is provided with a sliding groove, and the sliding wiring end also slides along the sliding groove along with the sliding of the sliding block in the first outer sleeve block towards the right.

Technical Field

The invention relates to the technical field of switching elements, in particular to a potentiometer.

Background

At present, a considerable number of hall potentiometers, switches and the like utilize the hall effect, and generally include a hall element, a permanent magnet and a spring, wherein the permanent magnet is close to the hall element to change the hall potential of the hall element, so that the circuit connected with the hall element changes correspondingly, for example, chinese patent with patent application number "2018214016136" and patent name "a safety switch", including a base, a shaft rod, a spring, a magnetic element and the hall element, the spring, the magnetic element and the hall element are located in the base, at least a part of the shaft rod can be located outside the base, the rest of the shaft rod is located in the base, one end of the spring is abutted against the shaft rod, the other end of the spring is abutted against the base, the magnetic element and the shaft rod are located in the base and fixed by a split phase, when the shaft rod is not subjected to an external force, the magnetic element is far away from the, the magnetic element enters the effective range of the Hall element, and the safety switch further comprises an interface which is electrically connected with the output end of the Hall element, so that the safety of the safety switch can be relatively improved. In use, the spring is easy to wear in the using process, so that the adjusting precision is reduced, stepless adjustment is difficult to realize, the spring is easy to fatigue damage, the service life of the whole switch is influenced, and therefore the Hall potentiometer without the spring is designed for solving the problem that the spring in the potentiometer and the switch is easy to damage.

Disclosure of Invention

Aiming at the existing problems, the invention provides a potentiometer, which changes the position relation between a potential adjusting structure on a base block and a linear Hall element by stepless adjustment of relative movement between a movable block and the base block, namely by utilizing a magnetic conductive suction block structure on the movable block and a magnetic conductive sheet on the base block which are magnetically sucked together, thereby realizing stepless or geared Hall potential adjustment, having good adjustability, and the magnetic conductive suction block structure can be magnetically sucked together with the magnetic conductive sheet after being worn, thereby avoiding the defect that the service life of the whole Hall potentiometer is restricted by a spring on the existing Hall potentiometer.

The technical scheme of the invention is as follows:

the invention provides a potentiometer, which comprises a movable block, a base block and a potential adjusting structure, wherein the movable block is embedded in the base block, the potential adjusting structure is arranged between the movable block and the base block, a magnetic conductive suction block structure is embedded in the part, far away from the potential adjusting structure, of the movable block, a magnetic conductive sheet is adsorbed at the end, extending out of the movable block, of the magnetic conductive suction block structure, the magnetic conductive sheet is embedded and fastened on the base block, so that the magnetic conductive suction block structure and the magnetic conductive sheet are magnetically adsorbed together to generate resistance for preventing the movable block from moving relative to the base block, and the potential adjusting structure generates adjustable potential change.

Further, the block structure is inhaled to magnetic conduction includes non-magnetic conduction spacing block, magnetic force generation piece and magnetic conduction lateral plate, non-magnetic conduction spacing block supports and leans on the magnetic conduction piece, the tip of keeping away from the magnetic conduction piece on the non-magnetic conduction spacing block presses and has magnetic force generation piece, the both sides of magnetic force generation piece and non-magnetic conduction spacing block are fixed with the magnetic conduction lateral plate respectively, the tip that the magnetic conduction lateral plate is close to the magnetic conduction piece supports and leans on the magnetic conduction lateral plate for two magnetic pole ends of magnetic force generation piece support respectively and lean on and inhale mutually through magnetic conduction lateral plate and magnetic conduction piece magnetism.

Furthermore, the potential adjusting structure is a magnetic generating block capable of generating magnetism, a hall element socket capable of being embedded with a hall element is arranged on the part, close to the potential adjusting structure, of the base block, so that the movable block moves relative to the base block in a state that the hall element is embedded in the hall element socket, the position relation between the potential adjusting structure and the hall element changes, and the hall element is influenced by the change of a surrounding magnetic field to generate corresponding hall potential change.

Furthermore, the movable block is of a rectangular block structure and is embedded in the inner cavity of the base block, the inner cavity of the base block is of a rectangular structure, a poking long hole communicated with the outside is formed in the center of the upper end of the inner cavity of the base block, a poking block penetrates through the poking long hole, the lower end of the poking block extends into the inner cavity of the base block, and the lower end of the poking block is fixedly arranged on the movable block, so that the movable block moves back and forth in the inner cavity of the base block under the condition that the poking block moves back and forth along the poking long hole.

Furthermore, the front end and the rear end of the movable block are respectively provided with a vertically embedded potential adjusting structure and a horizontally embedded magnetic conducting suction block structure, the front end of the substrate block corresponding to the potential adjusting structure is provided with a Hall element socket, and the rear end of the substrate block corresponding to the magnetic conducting suction block structure is provided with a magnetic conducting sheet, so that the magnetic adsorption effect of the magnetic conducting suction block structure and the magnetic conducting sheet can block the resistance of the movable block moving in the inner cavity of the substrate block.

Furthermore, the movable block is a fan-shaped block structure, the left side and the right side of the movable block are respectively provided with a hinged protrusion, and the hinged protrusions extend in opposite directions and are embedded into and hinged on the base block respectively, so that the movable block can swing relative to the base block by taking the two hinged protrusions as a rotation center.

Furthermore, the front end and the rear end of the movable block embedded in the base block are respectively transversely embedded with a potential adjusting structure and a magnetic conductive suction block structure, the front end of the base block corresponding to the potential adjusting structure is provided with a Hall element socket with a downward opening, and the rear end right side of the base block corresponding to the magnetic conductive suction block structure is provided with a magnetic conductive sheet, so that the magnetic conductive suction block structure and the magnetic conductive sheet are magnetically adsorbed together all the time in the swinging process of the movable block relative to the base block.

Furthermore, the upper part and the lower part of the movable block embedded in the base block are respectively transversely embedded with an electric potential adjusting structure and a magnetic conductive suction block structure, the front end of the base block corresponding to the electric potential adjusting structure is provided with a Hall element socket with a downward opening, the lower end of the movable block is in an arc-shaped curved surface shape with the circle center positioned on two hinged raised central lines, and the bottom of the base block corresponding to the magnetic conductive suction block structure is provided with a magnetic conductive sheet with an arc-shaped sheet structure, so that the magnetic conductive suction block structure and the magnetic conductive sheet are always magnetically adsorbed together in the swinging process of the movable block relative to the base block.

Furthermore, the two hinged protrusions are embedded into and fixed at two ends of a rotating shaft on the movable block, one end of each hinged protrusion extends in the direction away from the movement and extends out of the base block, a rotating wheel is fixedly arranged at the end part of each hinged protrusion extending out of the base block, so that the rotating wheel outside the base block is rotated, and the movable block swings in the base block.

Furthermore, the magnetic conduction pieces are respectively provided with gear holes corresponding to the shapes and the intervals of the two magnetic conduction side pieces, so that under the condition that the movable block moves to a certain position relative to the base block, the two magnetic conduction side pieces respectively correspond to the gear holes and the projections of the two magnetic conduction side pieces to the magnetic guide pieces are respectively superposed with the corresponding gear holes, a certain gear is formed in the movable block in the process of moving relative to the base block, and the influence of the potential adjusting structure on the Hall element is convenient to control.

Furthermore, the electric potential adjusting structure is a resistance-type electric potential adjusting structure capable of generating resistance change, so that the resistance-type electric potential adjusting structure generates dislocation in the resistance-type electric potential adjusting structure along with relative sliding between the sliding block and the base block, and stepless or gear-position electric potential adjustment is realized.

Furthermore, the resistance type potential adjusting structure comprises a sliding wiring end, a sliding groove, a fixed wiring end, a resistance sheet and a sliding sheet, the substrate block is a first outer sleeve block, the movable block is a sliding block, the resistance sheet is embedded in the right end of the bottom in the first outer sleeve block, the lower side of the right end is provided with the fixed wiring end extending out of the first outer sleeve block, the sliding sheet is embedded in the right end of the sliding block, the lower end of the sliding block extends out of the lower end of the sliding block, and the sliding sheet is in contact with the resistance sheet along with the sliding of the sliding block rightward in the first outer sleeve block, so that the resistance is adjusted from large to; and the sliding sheet is provided with a sliding wiring end, in order to adapt to the sliding of the sliding sheet along with the first outer sleeve block, the side wall of the first outer sleeve block is provided with a sliding groove, and the sliding wiring end also slides along the sliding groove along with the sliding of the sliding block in the first outer sleeve block towards the right.

Due to the adoption of the technology, compared with the prior art, the invention has the following specific positive beneficial effects:

1. the invention does not need a spring, realizes the position relation change between the potential adjusting structure on the base block and the linear Hall element by stepless adjustment of relative movement between the movable block and the base block, namely by utilizing the magnetic attraction block structure on the movable block and the magnetic conducting sheet on the base block which are magnetically attracted together, realizes the stepless or geared Hall potential adjustment, and has good adjustability.

2. The magnetic attraction block structure can be magnetically attracted with the magnetic conduction sheet after being worn, so that the defect that the service life of the whole Hall potentiometer is limited by a spring on the existing Hall potentiometer is overcome, the service life is long, and the stability is good.

3. The invention provides a plurality of solutions, and can meet the use requirements under different use conditions.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is an exploded schematic view of the structure shown in FIG. 1;

FIG. 3 is a schematic diagram of the structure of the nested block numbered 6 in FIG. 1;

FIG. 4 is a schematic structural view of a second embodiment of the present invention;

FIG. 5 is a top view of the structure shown in FIG. 4;

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;

fig. 7 is a schematic structural view of the modified lower magnetic conductive plate 18 in fig. 6;

FIG. 8 is a schematic structural view of a third embodiment of the present invention;

FIG. 9 is a top view of the structure shown in FIG. 8;

FIG. 10 is a cross-sectional view taken at B-B of FIG. 9;

FIG. 11 is a schematic structural view of a fourth embodiment of the present invention;

fig. 12 is a schematic structural view of a magnetic conductive sheet according to a first embodiment of the present invention after modification;

fig. 13 is a schematic structural view of a magnetic conductive sheet according to a third embodiment of the present invention after being modified;

FIG. 14 is a schematic structural view of a sixth embodiment of the present invention;

FIG. 15 is a top plan view of a sixth embodiment of the present invention;

fig. 16 is a cross-sectional view at C-C in fig. 15.

In the figure: 1-a first adjusting swinging block, 2-a nested block, 3-a magnetic conductive fixed block, 4-a first hinged bulge, 5-a first pressing notch, 6-a side embedded sheet groove, 7-a first isolating block, 8-a first magnetic force generating block, 9-a magnetic conductive end sheet, 10-a first embedded magnetic block, 11-a first Hall element socket, 12-a shifting block, 13-a shifting long hole, 14-a first outer sleeve block, 15-a first Hall element, 16-a sliding block, 17-a second embedded magnetic block, 18-a lower magnetic conductive sheet, 19-a first vertical magnetic conductive sheet, 20-a second isolating block, 21-a second vertical magnetic conductive sheet, 22-a second magnetic force generating block, 23-a gear hole, 24-a second adjusting swinging block, 25-a rotating shaft, 26-a second outer sleeve block, 27-a second Hall element, 28-a second pressing notch, 29-a third vertical magnetic conductive sheet, 30-a third isolating block, 31-a fourth vertical magnetic conductive sheet, 32-an arc magnetic attraction sheet, 33-a third magnetic force generation block, 34-a swinging connecting block, 35-a third embedded magnetic block, 36-a second Hall element socket, 37-a rotating wheel, 38-a sliding terminal, 39-a sliding groove, 40-a fixed terminal, 41-a resistor sheet and 42-a sliding sheet.

Detailed Description

The invention provides a potentiometer, which comprises a movable block, a base block and a potential adjusting structure, wherein the movable block is embedded in the base block, the movable block is provided with the potential adjusting structure, the part of the movable block, which is far away from the potential adjusting structure, is embedded with a magnetic conductive suction block structure, the end part of the magnetic conductive suction block structure, which extends out of the movable block, is adsorbed with a magnetic conductive sheet, the magnetic conductive sheet is embedded and fastened on the base block, so that the magnetic conductive suction block structure and the magnetic conductive sheet are magnetically adsorbed together to generate resistance for hindering the movable block to move relative to the base block, the base block is provided with a Hall element corresponding to the potential adjusting structure, the Hall element is a linear Hall integrated circuit, the movable block is driven to move relative to the base block manually, the position relation between the potential adjusting structure and the Hall element is changed, and the Hall potential.

The magnetic attraction block structure comprises a non-magnetic conduction isolation block made of plastics, a magnetic force generation block made of a magnet block and a magnetic conduction side plate made of magnetic conduction materials, wherein the non-magnetic conduction isolation block abuts against the magnetic conduction plate, the end part, far away from the magnetic conduction plate, of the non-magnetic conduction isolation block is pressed against the magnetic force generation block, the magnetic conduction side plates are fixed on two sides of the magnetic force generation block and two sides of the non-magnetic conduction isolation block respectively, and the end part, close to the magnetic conduction plate, of the magnetic conduction side plate abuts against the magnetic conduction plate, so that two magnetic pole ends of the magnetic force generation block abut against the magnetic conduction side plate respectively and are magnetically attracted with the.

The Hall element socket capable of being embedded with the Hall element is arranged on the part, close to the potential adjusting structure, of the base block, so that the movable block moves relative to the base block in the state that the Hall element is embedded into the Hall element socket, the position relation between the potential adjusting structure and the Hall element is changed, and the Hall element is influenced by the change of the surrounding magnetic field to generate corresponding Hall potential change.

The movable block is in a rectangular block structure and is embedded in the inner cavity of the base block, the inner cavity of the base block is in a rectangular structure, a poking long hole 13 communicated with the outside is formed in the center of the upper end of the inner cavity of the base block, a poking block 12 penetrates through the poking long hole 13, the lower end of the poking block 12 extends into the inner cavity of the base block, and the lower end of the poking block 12 is fixedly arranged on the movable block, so that the movable block moves back and forth in the inner cavity of the base block under the condition that the poking block 12 moves back and forth along the poking long hole.

The movable block is further limited to be provided with a vertically embedded potential adjusting structure and a transversely embedded magnetic conducting suction block structure at the front end and the rear end of the movable block respectively, a Hall element socket is arranged at the front end of the base block corresponding to the potential adjusting structure, and a magnetic conducting sheet is arranged at the lower side of the rear end of the base block corresponding to the magnetic conducting suction block structure, so that the magnetic adsorption effect of the magnetic conducting suction block structure and the magnetic conducting sheet can block the resistance of the movable block moving in the inner cavity of the base block.

The movable block is further limited to be in a fan-shaped block structure, the left side and the right side of the movable block are respectively provided with a hinge protrusion, the two hinge protrusions respectively extend in opposite directions and are embedded into and hinged on the base block, and the movable block can swing relative to the base block by taking the two hinge protrusions as a rotation center.

The movable block is embedded into the base block, and the front end and the rear end of the movable block are respectively transversely embedded with a potential adjusting structure and a magnetic conductive suction block structure, the front end of the base block corresponding to the potential adjusting structure is provided with a Hall element socket with a downward opening, and the rear end right side of the base block corresponding to the magnetic conductive suction block structure is provided with a magnetic conductive sheet, so that the magnetic conductive suction block structure and the magnetic conductive sheet are always magnetically adsorbed together in the swinging process of the movable block relative to the base block.

The upper part and the lower part of the movable block embedded in the base block are respectively and transversely embedded with an electric potential adjusting structure and a magnetic conductive suction block structure, the front end of the base block corresponding to the electric potential adjusting structure is provided with a Hall element socket with a downward opening, the lower end of the movable block is in an arc-shaped curved surface shape with the circle center positioned on the central line of the two hinged bulges, and the bottom of the base block corresponding to the magnetic conductive suction block structure is provided with a magnetic conductive sheet in an arc-shaped sheet structure, so that the magnetic conductive suction block structure and the magnetic conductive sheet are always magnetically adsorbed together in the swinging process of the movable block relative to the base block.

It is further defined that the two hinge protrusions are two ends of a rotating shaft 25 embedded and fixed on the movable block, one end of the two hinge protrusions extends in a direction away from the movement and extends out of the base block, and a rotating wheel 37 is fixedly arranged at the end of the hinge protrusion extending out of the base block, so that the rotating wheel 37 outside the base block is rotated and the movable block swings in the base block.

And further, the magnetic conducting sheets are respectively provided with gear holes 23 corresponding to the shapes and the intervals of the two magnetic conducting side sheets, so that under the condition that the movable block moves to a certain position relative to the base block, the two magnetic conducting side sheets respectively correspondingly contact the gear holes 23, and the projections of the two magnetic conducting side sheets to the magnetic conducting sheets are respectively superposed with the corresponding gear holes 23, so that a certain gear is formed in the movable block in the process of moving relative to the base block, and the influence of a potential adjusting structure on the Hall element is convenient to control.