A stepless adjustment control structure

Abstract

The application relates to a stepless adjustment operation structure, which comprises a casing, a rotating part rotatably connected to the casing, a restoring part connected to the casing and used for providing a rotating restoring force to the rotating part, a magnetic part fixedly connected to the rotating part, and a Hall detection part, wherein the restoring part, the magnetic part and the Hall detection part are located in the casing, when the rotating part drives the magnetic part to rotate, the magnetic field direction and / or field strength passing through the Hall detection part changes, so that the rotating part of the application rotates to different angles, the signal value output by the Hall detection part is different, according to the characteristic, the system can match different signal values with different control instructions, so that multiple instructions can be generated only by controlling the rotating action of the rotating part, the operation cost is reduced, and the operation accuracy is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric appliance switch, in particular to a stepless adjustment operation structure. BACKGROUND

[0002] In the current intelligent furniture, an operation structure for controlling the action of the intelligent furniture is usually provided, which can be a wired or wireless remote controller (mobile type), or a control panel or button fixed on the surface of the furniture (fixed type).

[0003] At present, the fixed type operation structure has the following problems: taking the operation structure with multiple keys as an example, it is difficult for the user to accurately and quickly press the key to be pressed without looking at the keys in advance; or taking the operation structure with a touch panel as an example, it is also difficult for the user to accurately and quickly find the area to be pressed without looking at the control panel. SUMMARY

[0004] In order to facilitate the user to accurately control the operation structure, the present application provides a stepless adjustment operation structure.

[0005] The stepless adjustment operation structure provided by the present application adopts the following technical solution:

[0006] The stepless adjustment operation structure comprises a shell, a rotating member rotatably connected to the shell, a restoring member connected to the shell and used for providing a rotating restoring force to the rotating member, a magnetic member fixedly connected to the rotating member, and a Hall detection member, wherein the restoring member, the magnetic member and the Hall detection member are all located in the shell, and when the rotating member drives the magnetic member to rotate, the magnetic field direction and / or field strength passing through the Hall detection member changes.

[0007] By adopting the above technical solution, the magnetic field direction and / or strength passing through the Hall detection member constantly changes during the rotation of the rotating member, and then the electrical signal value output by the Hall detection member can also constantly change, and different electrical signal values can be matched into different control instructions, which is equivalent to that the user only needs to operate the rotating member to complete the switching of multiple instructions, so as to facilitate the user to accurately control the operation structure; taking an electric sofa as an example, the motor can drive the sofa backrest to overturn, and the multiple instructions above represent different gears of the motor speed, that is, the angle of the rotating member rotation corresponds to the speed of the motor output, and the user can realize stepless speed regulation of the motor of the electric sofa by rotating the rotating member.

[0008] Preferably, a signal input member is further installed in the shell, and the rotating member is rotatably and slidingly connected to the shell; when the rotating member slides to a specific position in the direction of the shell, the signal input member outputs a switching signal.

[0009] By adopting the technical scheme, more operation instructions are given to the rotating member, that is, when the user presses the rotating member to a specific position, the signal input member outputs a switching signal, and in actual application, taking a sofa with two motors respectively controlling different actions as an example, when the system does not acquire the switching signal, the user can realize stepless speed regulation of a first motor of the electric sofa by rotating the rotating member, and when the system acquires the switching signal, the user can realize stepless speed regulation of a second motor of the electric sofa by rotating the rotating member.

[0010] Preferably, the rotating member comprises an outer rotating part connected to the cabinet and an inner rotating part rotatingly arranged in the outer rotating part, and a limiting structure for limiting mutual rotation is arranged between the outer rotating part and the inner rotating part; the magnetic member comprises an outer magnetic part fixed to the outer rotating part and an inner magnetic part fixed to the inner rotating part.

[0011] By adopting the technical scheme, the rotating member can have two gears of acceleration regulation and deceleration regulation for motor speed; if the user wants to accelerate the gear, the magnetic field direction of the inner magnetic part is adjusted to be the same as or similar to that of the outer magnetic part, and then the outer rotating part and the inner rotating part are rotated together, so that the magnetic field strength passing through the Hall detection member is stronger, and the change of the motor speed of the sofa is faster; if the user wants to decelerate the gear, the inner magnetic part needs to be kept in the initial position and then the outer magnetic part is rotated, so that the magnetic field strength passing through the Hall detection member gradually increases, but in this process, the increasing rate is small, and the acceleration of the motor of the sofa is slower.

[0012] Preferably, a limiting part is fixed in the cabinet, the limiting part blocks the rotating path of the magnetic member, and is used for limiting the angle of the magnetic member rotating around the positive direction or the reverse direction from the initial position to be not greater than ninety degrees.

[0013] By adopting the technical scheme, the detection principle of the Hall detection member is that control current I is passed through both ends of the Hall detection member, and a magnetic field with a magnetic induction strength of B is applied in the vertical direction of the detection member, so that Hall voltage with a potential difference of UH is generated in the direction perpendicular to the current and the magnetic field; in the scheme, the rotation of the magnetic member causes the change of the magnetic field direction, but no matter how the change is, the main magnetic field direction changes in a reference plane, so that the passing direction of the current is perpendicular to the reference plane, and with the rotation of the magnetic member, the potential difference of a specific direction also changes, and one cycle of change of the potential difference is completed when the rotating member rotates by ninety degrees from the initial position, so that the potential difference changes from zero to a peak value, and therefore the rotation angle of the rotating member is limited in the scheme, so that the rotating member can positively control the motor speed in the angle range, that is, the greater the rotation angle of the rotating member, the faster the motor speed.

[0014] Preferably, the inner rotating part and the outer rotating part are in rotating and sliding fit, the inner rotating part comprises a first stop position and a second stop position on its sliding path, the second stop position is closer to the inside of the shell than the first stop position; the limiting structure comprises a positioning member fixed in the shell, when the inner rotating part slides to the first stop position, the positioning member does not limit the rotation of the inner rotating part, when the inner rotating part slides to the second stop position, the positioning member limits the rotation of the inner rotating part.

[0015] By adopting the above technical scheme, since the inner rotating part and the outer rotating part have magnetic force of mutual repulsion or mutual attraction, when the user wants to keep the inner rotating part still and only rotate the outer rotating part, the inner rotating part can be slid to the second stop position, at this time, the inner rotating part is limited from rotating by the positioning member, so the user does not need to separately leave a hand to limit the rotation of the inner rotating part in the subsequent process; in addition, in the initial state, the magnetic poles of the inner rotating part and the outer rotating part close to each other are the same kind of magnetic poles, that is, there is strong repulsive force between the inner rotating part and the outer rotating part in the initial state; and the positioning member is arranged to provide assistance to the user when the user only needs to rotate the outer rotating part, which just offsets part of the resistance of the restoring member, thereby reducing the work done by the user in controlling the outer rotating part.

[0016] Preferably, the limiting structure comprises a movable slot opened in the outer rotating part, a limiting slot opened in the outer rotating part, and a clamping member fixed on the outer wall of the inner rotating part, the movable slot and the limiting slot are arranged and communicated along the length direction of the rotating member; when the inner rotating part slides to the first stop position, the clamping member is located in the limiting slot, and the limiting slot limits the circumferential rotation of the inner rotating part, when the inner rotating part slides to the second stop position, the clamping member is located in the movable slot, and the movable slot does not limit the circumferential rotation of the inner rotating part.

[0017] By adopting the above technical scheme, a structure for locking the circumferential rotation of the inner rotating part and the outer rotating part is provided, and the structure can cooperate with the positioning member, so that when the user needs the inner rotating part and the outer rotating part to rotate synchronously, the clamping member can be slid into the limiting slot, and in the subsequent process, the user can control the synchronous rotation of the entire rotating member by only controlling the outer rotating part, thereby saving operation cost.

[0018] Preferably, one end of the limiting slot away from the movable slot is communicated with the end of the outer rotating part.

[0019] By adopting the above technical scheme, the assembly of the inner rotating part and the outer rotating part is facilitated.

[0020] Preferably, when the inner rotating part slides to the first stop position, the two magnetic pole connecting line segments of the inner magnetic part are located on one side of the two magnetic pole connecting line of the outer magnetic part, and when the inner rotating part slides to the second stop position, the two magnetic pole connecting line segments of the inner magnetic part are located on the other side of the two magnetic pole connecting line of the outer magnetic part.

[0021] By adopting the technical scheme, in the initial state, the N poles of the inner and outer magnetic parts are arranged close to each other, and the S poles of the inner and outer magnetic parts are also arranged close to each other, so that a large repulsion force exists between the inner and outer magnetic parts, at this time, if it is needed to make the inner and outer rotating parts rotate asynchronously, the inner rotating part can be pushed inward from the first stop position to the second stop position, in the whole pushing process, because the position where the repulsion force of the outer magnetic part to the inner magnetic part is the largest is at the line connecting the two poles of the outer magnetic part, the repulsion force of the outer magnetic part to the inner magnetic part first increases and then decreases, so that the probability that the inner rotating part changes the stop position due to accidental touch or the like can be reduced.

[0022] Preferably, a signal input element is arranged in the shell, and the inner rotating part and the outer rotating part rotate and slide together, and when the inner rotating part slides to a specific position in the direction of the shell, the signal input element outputs a switching signal.

[0023] By adopting the technical scheme, more operation instructions are given to the rotating part, that is, when the user presses the inner rotating part to a specific position, the signal input element outputs a switching signal, and in actual application, taking a sofa controlled by two motors to perform different actions as an example, when the system does not obtain the switching signal, the user can realize stepless speed regulation of the first motor of the electric sofa by rotating the rotating part, and when the system obtains the switching signal, the user can realize stepless speed regulation of the second motor of the electric sofa by rotating the rotating part.

[0024] Preferably, a force applying element is fixed to the end of the inner rotating part away from the inner magnetic part.

[0025] By adopting the technical scheme, the user can conveniently push and pull the inner rotating part.

[0026] In summary, the present application has at least one of the following beneficial technical effects of the stepless adjustment control structure:

[0027] The rotating part rotates to different angles, and the signal values output by the Hall detection element are different, according to this feature, the system can match different signal values with different control instructions, so that the user only needs to control the rotation of the rotating part, that is, multiple instructions can be generated, so the user does not need to stare at the control panel to complete the operation, which greatly reduces the operation cost, in other words, the control can be more accurately realized; moreover, the rotating part includes two inner and outer rotating parts, and can perform synchronous or asynchronous actions, so that the control instructions that can be realized by the rotating part are increased; in addition, due to the repulsion between the same poles of the inner and outer magnetic parts, the inner magnetic part can slide along the axial direction without easily changing the position without setting a limiting structure, and has high position stability. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a cross-sectional structure schematic diagram of embodiment one of the present application;

[0029] Figure 2 is a cross-sectional structure schematic diagram of embodiment two of the present application, showing the state of the inner rotating part at the first stop position;

[0030] Figure 3 is a cross-sectional structure schematic diagram of embodiment two of the present application, showing the state of the inner rotating part at the second stop position;

[0031] Figure 4 is Figure 2 and Figure 3 is an exploded cross-sectional structure diagram of the inner rotating part and the outer rotating part in

[0032] Figure 5 is Figure 2 is a cooperation structure diagram of the inner and outer magnetic parts, i.e. the inner and outer rotating parts, showing the state of the inner rotating part at the first stop position in

[0033] Figure 6 is Figure 3 is a cooperation structure diagram of the inner and outer magnetic parts, i.e. the inner and outer rotating parts, showing the state of the inner rotating part at the first stop position and the outer magnetic part rotating by ninety degrees in

[0034] Figure 7 is a cross-sectional structure schematic diagram of embodiment three of the present application.

[0035] Mark explanation: 1, the shell; 11, the fixed plate; 111, the signal input piece; 112, the female pipe; 113, the sub-pipe; 114, the spring; 12, the hall detection piece; 121, the wire; 2, the rotating piece; 21, the outer rotating part; 211, the clamping ring; 22, the inner rotating part; 221, the force applying piece; 3, the recovery piece; 4, the magnetic piece; 41, the outer magnetic part; 42, the inner magnetic part; 5, the mounting plate; 51, the outer mounting part; 52, the inner mounting part; 6, the movable slot; 61, the limiting slot; 62, the clamping piece; 7, the limiting piece; 8, the positioning piece; 81, the round rod; 9, the two magnetic pole connecting lines of the outer magnetic part. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings Figures 1-7 The present application will be further described in detail.

[0037] The embodiment of the present application discloses a stepless adjustment control structure.

[0038] Embodiment 1:

[0039] Reference Figure 1The stepless adjustment operation structure comprises a shell 1, a rotating piece 2 rotatably connected to the shell 1, a restoring piece 3 connected to the shell 1 and used for providing a rotating restoring force to the rotating piece 2, a mounting plate 5 fixedly connected to an end of the rotating piece 2, a magnetic piece 4 fixed to a side of the mounting plate 5 away from the rotating piece 2, and a Hall detection piece 12; when the operation structure is applied to furniture, the shell 1 can be selected as part of the shell of the furniture, and in this embodiment, the shell 1 is part of the shell of an electric sofa; the restoring piece 3 can be selected as a coil spring, one end of which is fixed in the shell 1 and the other end of which is connected to the outer periphery of the rotating piece 2, the magnetic piece 4 can be selected as a U-shaped magnet, the Hall detection piece 12 can be selected as a linear Hall sensor, and a wire 121 is connected to the Hall detection piece 12; the Hall detection piece 12 is located at a position substantially between the two poles of the magnetic piece 4, and the two poles of the magnetic piece 4 are wrapped around the outer periphery of the Hall detection piece 12 when the rotating piece 2 drives the magnetic piece 4 to rotate.

[0040] During the rotation of the rotating piece 2, the magnetic field direction and / or strength of the Hall detection piece 12 continuously changes, and the electrical signal value that can be output by the Hall detection piece 12 also continuously changes; different electrical signal values can be matched into different control instructions, which is equivalent to that the user only needs to operate the rotating piece 2 to complete the switching of multiple instructions, thereby facilitating the user to accurately control the operation structure; for example, the electric motor of the electric sofa can drive the sofa backrest to overturn, and the multiple instructions described above represent different gears of the motor speed, that is, the rotating angle of the rotating piece 2 corresponds to the rotating speed output by the motor, and the user can realize stepless speed adjustment of the motor of the electric sofa by rotating the rotating piece 2.

[0041] It is worth noting that the detection principle of the Hall detection piece 12 is that control current I is passed through both ends of the Hall detection piece 12, and a magnetic field with a magnetic induction strength of B is applied in the vertical direction of the detection piece, and then a Hall voltage with a potential difference of UH is generated in the direction perpendicular to the current and the magnetic field; in this scheme, the rotation of the magnetic piece 4 will cause the change of the magnetic field direction, but no matter how the change, the main magnetic field direction changes in a reference plane, and the current passing direction is perpendicular to the reference plane, so that with the rotation of the magnetic piece 4, the potential difference in a specific direction will change, and the rotating piece 2 rotates one circle, and the potential difference completes a period of change; in the actual process, the rotating piece 2 rotates ninety degrees from the initial position in the forward or reverse direction, and the potential difference changes from zero to the peak value. The field strength of the rotating piece 2 in the forward and reverse directions is the same, but the direction is opposite.

[0042] In this embodiment, the reply 3, magnetic member 4 and Hall detection member 12 are located in the shell 1, and the shell 1 is also fixed with a fixed plate 11, the fixed plate 11 is installed with a telescopic pipe, the telescopic pipe includes a female pipe 112 fixed to the fixed plate 11 and a male pipe 113 slidingly arranged in the female pipe 112, the Hall detection member 12 is installed at the end of the male pipe 113, and the telescopic pipe is provided with a spring 114; The fixed plate 11 can also be installed with a signal input member 111, which can be selected as a touch switch or a proximity switch. When the user presses the rotary member 2 inward, the rotary member 2 can push the magnetic member 4 to move inward, and finally push the Hall detection member 12 to move inward, until the Hall detection member 12 moves to a specific position or abuts against the signal input member 111, then the signal input member 111 can output a switching signal.

[0043] In another embodiment, the Hall detection member 12 and the fixed plate 11 are not provided with a telescopic pipe, but are fixedly connected, and when the user presses the rotary member 2 inward, the rotary member 2 can push the magnetic member 4 to move inward, and after a certain distance, the signal input member 111 can output a switching signal.

[0044] The switching signal can realize the switching of the object controlled by the rotary member 2. Taking a sofa controlled by two motors as an example, when the system does not obtain the switching signal, the user can realize stepless speed regulation of the first motor of the electric sofa by rotating the rotary member 2, and when the system obtains the switching signal, the user can realize stepless speed regulation of the second motor of the electric sofa by rotating the rotary member 2.

[0045] The implementation principle of embodiment 1 is that the rotary member 2 is rotated to different angles, and the signal value output by the Hall detection member 12 thereof is different. According to this feature, the system can match different signal values with different control instructions, so that multiple instructions can be generated by only controlling the rotation of the rotary member 2, and the user does not need to stare at the control panel to complete the operation, which greatly reduces the operation cost, in other words, the control can be more accurate.

[0046] Embodiment 2:

[0047] Reference Figure 2 and Figure 3 The difference between this embodiment and embodiment 1 is that the rotary member 2 and the magnetic member 4 are both disassembled into two components, and there is a certain structural relationship between them, which is as follows:

[0048] The rotating member 2 comprises an outer rotating part 21 connected to the casing 1 and an inner rotating part 22 rotatingly penetrating into the outer rotating part 21, and a limiting structure is arranged between the outer rotating part 21 and the inner rotating part 22 for limiting the mutual rotation; the magnetic member 4 comprises an outer magnetic part 41 and an inner magnetic part 42, one end of the outer rotating part 21 fixedly arranged in the casing 1 is provided with an outer mounting part 51, the outer magnetic part 41 is fixed on the outer mounting part 51, one end of the inner rotating part 22 fixedly arranged in the casing 1 is provided with an inner mounting part 52, and the inner magnetic part 42 is fixed on the inner mounting part 52;

[0049] The outer periphery of the outer rotating part 21 is fixedly provided with two clamping rings 211, the two clamping rings 211 are clamped between the casing 1, for preventing the outer rotating part 21 from moving along the axial direction, i.e. the outer rotating part 21 can only rotate around the central axis thereof, and the restoring member 3 is connected to the outer rotating part 21;

[0050] The purpose of the above arrangement is to make the rotating member 2 have two gears of acceleration adjustment and deceleration adjustment for the motor rotating speed; if the user wants to accelerate the gear, the magnetic field direction of the inner magnetic part 42 is adjusted to be the same as or similar to the magnetic field direction of the outer magnetic part 41, and then the outer rotating part 21 and the inner rotating part 22 are rotated together, so that the magnetic field intensity passing through the Hall detection member 12 is stronger, and the rotating speed of the sofa motor is changed faster; if the user wants to decelerate the gear, the inner magnetic part 42 needs to be kept in the initial position, and then the outer magnetic part 41 is rotated, so that the magnetic field intensity passing through the Hall detection member 12 is gradually increased, but the increasing rate is small in this process, and the increasing speed of the sofa motor is slower;

[0051] It is worth mentioning that the inner magnetic part 42 and the outer magnetic part 41 are in the same-pole close state in the initial position.

[0052] The inner rotating part 22 is rotationally and slidingly fitted with the outer rotating part 21, the inner rotating part 22 comprises a first stop position and a second stop position on the sliding path thereof, and the second stop position is closer to the inside of the casing 1 than the first stop position;

[0053] When the inner rotating part 22 slides to the first stop position (see Figure 2 ), the two magnetic pole connecting line segments of the inner magnetic part 42 are located on one side of the two magnetic pole connecting lines of the outer magnetic part 41, and when the inner rotating part 22 slides to the second stop position (see Figure 3 ), the two magnetic pole connecting line segments of the inner magnetic part 42 are located on the other side of the two magnetic pole connecting lines of the outer magnetic part 41.

[0054] Since the N-poles of the outer magnetic part 41 and the inner magnetic part 42 are arranged close to each other in the initial state, and the S-poles of the two are also arranged close to each other, there is a large repulsion force between them. At this time, if it is necessary to push the inner rotating part 22 inward to move from the first stop position to the second stop position, the repulsion force of the outer magnetic part 41 to the inner magnetic part 42 will first increase and then decrease during the entire pushing process, because the position where the repulsion force of the outer magnetic part 41 to the inner magnetic part 42 is the largest is at the line connecting the two poles of the outer magnetic part 41. The purpose of the above arrangement can be summarized as follows: by means of the same repulsion characteristics of the inner and outer magnetic parts 41, the inner rotating part 22 can be relatively stably stopped at the two stop positions, and will not easily change position, thereby improving the control stability.

[0055] With reference to Figure 4 , the limiting structure includes a movable groove 6 formed in the outer rotating part 21, a limiting groove 61 formed in the outer rotating part 21, and a block-shaped clamping piece 62 fixed to the outer wall of the inner rotating part 22. The movable groove 6 and the limiting groove 61 are arranged along the length direction of the rotating part 2. The limiting groove 61 is provided with three limiting grooves, which are arranged at equal intervals around the central axis of the outer rotating part 21. One end of the limiting groove 61 is connected to the movable groove 6, and the other end is connected to the end of the outer rotating part 21.

[0056] When the inner rotating part 22 slides to the first stop position, the clamping piece 62 is located in the limiting groove 61, and the limiting groove 61 limits the circumferential rotation of the inner rotating part 22. At this time, the inner rotating part 22 and the outer rotating part 21 can rotate synchronously. When the inner rotating part 22 slides to the second stop position, the clamping piece 62 is located in the movable groove 6, and the movable groove 6 does not limit the circumferential rotation of the inner rotating part 22. At this time, the outer rotating part 21 can rotate independently.

[0057] With reference to Figure 5 and Figure 6 , the casing 1 is fixed with a limiting piece 7, which is in the form of a sheet. The limiting piece 7 blocks the rotation path of the magnetic part 4, and is used to limit the angle of rotation of the magnetic part 4 from the initial position in the forward or reverse direction, which is not greater than ninety degrees.

[0058] The limiting structure further comprises a positioning member 8 fixed in the casing 1. The positioning member 8 is in a C shape and is fixed to the casing 1 through a round rod 81. When the inner rotating part 22 slides to the first stop position, the positioning member 8 does not limit the rotation of the inner rotating part 22. When the user pushes the inner rotating part 22 inward to slide to the second stop position, the inner magnetic part 42 moves to one side of the positioning member 8, and at this time, the positioning member 8 can prevent the rotation of the inner rotating part 22. It is worth noting that the inner magnetic part 42 can be pushed to one side of the positioning member 8 only when the inner magnetic part 42 is at the initial angle. If the inner magnetic part 42 rotates by a certain angle, the positioning member 8 blocks the side of the inner magnetic part 42 away from the inner rotating part 22, that is, the inner magnetic part 42 cannot be pushed inward, and the inner rotating part 22 cannot move from the first stop position to the second stop position.

[0059] Reference Figure 2 The end of the inner rotating part 22 away from the inner magnetic part 42 is fixed with a force applying member 221, which facilitates the user to push and pull the inner rotating part 22.

[0060] The implementation principle of the embodiment 2 is that the rotating part 2 has two gears of acceleration adjustment and deceleration adjustment for the motor speed, thereby further increasing the purposes that can be achieved by controlling the rotating part 2.

[0061] Embodiment 3

[0062] Reference Figure 7 The difference between the embodiment 3 and the embodiment 2 is that a telescopic pipe is connected between the Hall detection member 12 and the fixed plate 11, and the structure of the telescopic pipe is the same as that described in the embodiment 1, and the fixed plate 11 is also provided with a signal input member 111.

[0063] The implementation principle of the embodiment 3 is that the rotating part 2 is given more operation instructions, that is, when the user presses the inner rotating part 22 to a specific position, the signal input member 111 outputs a switching signal. In the actual application process, taking a sofa with two motors respectively controlling different actions as an example, when the system does not obtain the switching signal, the user can realize stepless speed adjustment of the first motor of the electric sofa by rotating the rotating part 2, and when the system obtains the switching signal, the user can realize stepless speed adjustment of the second motor of the electric sofa by rotating the rotating part 2.

[0064] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A continuously variable adjustment actuation structure characterized by: The application relates to a rotating device, which comprises a casing (1), a rotating part (2) rotatably connected to the casing (1), a restoring part (3) connected to the casing (1) and used for providing a rotating restoring force to the rotating part (2), a magnetic part (4) fixedly connected to the rotating part (2), and a Hall detecting part (12), wherein the restoring part (3), the magnetic part (4) and the Hall detecting part (12) are located in the casing (1), and when the rotating part (2) drives the magnetic part (4) to rotate, the magnetic field direction and / or field intensity of the Hall detecting part (12) changes. The rotating part (2) comprises an outer rotating part (21) connected to the casing (1) and an inner rotating part (22) rotatably arranged in the outer rotating part (21), and a limiting structure is arranged between the outer rotating part (21) and the inner rotating part (22) for limiting the rotation of the outer rotating part (21) and the inner rotating part (22); the magnetic part (4) comprises an outer magnetic part (41) fixed to the outer rotating part (21) and an inner magnetic part (42) fixed to the inner rotating part (22). The inner rotating part (22) is rotatably and slidably connected to the outer rotating part (21), the inner rotating part (22) comprises a first stop position and a second stop position on the sliding path of the inner rotating part (22), and the second stop position is closer to the inside of the casing (1) than the first stop position; the limiting structure comprises a positioning part (8) fixed in the casing (1), when the inner rotating part (22) slides to the first stop position, the positioning part (8) does not limit the rotation of the inner rotating part (22), and when the inner rotating part (22) slides to the second stop position, the positioning part (8) limits the rotation of the inner rotating part (22). A limiting part (7) is fixed in the casing (1), the limiting part (7) is arranged on the rotating path of the magnetic part (4) and is used for limiting the rotation angle of the magnetic part (4) from the initial position to be not greater than 90 degrees in the forward direction or the reverse direction.

2. A stepless adjustment operating structure according to claim 1, characterized in that: A signal input part (111) is further arranged in the casing (1), the rotating part (2) is rotatably and slidably connected to the casing (1), and when the rotating part (2) slides to a specific position in the casing (1), the signal input part (111) outputs a switching signal.

3. A stepless adjustment operating structure according to claim 1, characterized in that: The limiting structure comprises a movable groove (6) arranged in the outer rotating part (21), a limiting groove (61) arranged in the outer rotating part (21), and a clamping part (62) fixed to the outer wall of the inner rotating part (22), the movable groove (6) and the limiting groove (61) are arranged and communicated along the length direction of the rotating part (2); when the inner rotating part (22) slides to the first stop position, the clamping part (62) is located in the limiting groove (61), and the limiting groove (61) limits the circumferential rotation of the inner rotating part (22); when the inner rotating part (22) slides to the second stop position, the clamping part (62) is located in the movable groove (6), and the movable groove (6) does not limit the circumferential rotation of the inner rotating part (22).

4. A stepless adjustment operating structure according to claim 3, characterized in that: One end of the limiting groove (61) far from the movable groove (6) is communicated with the end of the outer rotating part (21).

5. A stepless adjustment operating structure according to claim 1, characterized in that: When the inner rotating part (22) slides to the first stop position, the two magnetic pole connecting line segments of the inner magnetic part (42) are located on one side of the two magnetic pole connecting lines of the outer magnetic part (41), and when the inner rotating part (22) slides to the second stop position, the two magnetic pole connecting line segments of the inner magnetic part (42) are located on the other side of the two magnetic pole connecting lines of the outer magnetic part (41).

6. A stepless adjustment operating structure according to any one of claims 1, 3-5, characterized in that: The signal input part (111) is installed in the casing (1), the inner rotating part (22) is in rotating and sliding cooperation with the outer rotating part (21), and when the inner rotating part (22) slides to a specific position in the direction of the casing (1), the signal input part (111) outputs a switching signal.

7. A stepless adjustment operating structure according to claim 1, characterized in that: A force applying part (221) is fixed to the end of the inner rotating part (22) away from the inner magnetic part (42).

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