CN115765382A

CN115765382A - Rotary input control device and user input device

Info

Publication number: CN115765382A
Application number: CN202211364750.8A
Authority: CN
Inventors: 冯红开; 郭项培; 王悦
Original assignee: Shanghai Puyuan Jingdian Enterprise Development Co ltd
Current assignee: Shanghai Puyuan Jingdian Enterprise Development Co ltd
Priority date: 2022-11-02
Filing date: 2022-11-02
Publication date: 2023-03-07
Also published as: WO2024093988A1

Abstract

The present invention relates to a rotary input control device and a user input device. The input control device includes: a rotary input mechanism provided with a magnet; an electropermanent magnet assembly comprising an electropermanent magnet and a coil; the coil is arranged on the electric permanent magnet to magnetize or demagnetize the electric permanent magnet when electrified; and the control module is used for controlling the current of the coil so that the electric permanent magnet is in a magnetizing state or a demagnetizing state. The purpose of generating ratchet wheel damping hand feeling, resistance constant hand feeling or resistance-free hand feeling when a user rotates and inputs is achieved by magnetizing or demagnetizing the electro-permanent magnet, and the input control device can be assembled in the user input equipment by adopting a patch scheme, so that the assembly is convenient.

Description

Rotary input control device and user input device

Technical Field

The present invention relates to the field of electronic devices, and in particular, to a rotary input control device and a user input device.

Background

Rotatable input controls are used in electronic devices to allow a user to make inputs by rotating a knob or scroll wheel. The existing rotatable input control device has single rotating hand feeling.

At present, the schemes for adjusting the rotating hand feel are common:

(1) The motor controls the displacement of the reed to regulate and control the meshing degree of the reed and the toothed driving plate so as to achieve the purpose of adjusting the hand feeling of the knob. The scheme has the following defects: the motor is difficult to reduce in size, occupies a large space and is not suitable for compact application scenes; the life of the reed is limited; the assembly is complicated and the time is long.

(2) The elastic or magnetic structure is regulated and controlled by controlling the magnetic field of the electric permanent magnet, the elastic or magnetic structure is provided with a ratchet hand feeling generating device, and the purpose of adjusting the hand feeling of the knob is achieved by regulating and controlling the structure to control the meshing degree between the structures. The scheme has the following defects: the parts are many, the structure is complicated, the assembly is complicated.

(3) The electromagnetic acting force of the two electropermanent magnets on the toothed turntable is controlled by controlling a magnetic circuit between the two electropermanent magnets, and finally the purpose of controlling hand feeling mode conversion is achieved. The scheme has the following defects: the control scheme needs to continuously change the control current of the electropermanent magnet to ensure the accuracy of the magnetic circuit between the two electropermanent magnets, and the control scheme is complex, has high requirements on materials and needs to be continuously calibrated. Furthermore, since one of the electropermanent magnets is not controlled by the circuit, it cannot be re-magnetized when it is demagnetized, so that this solution cannot be applied to a patch solution when assembled to some overall apparatus.

Disclosure of Invention

Based on the above defects in the prior art, the present invention aims to provide a rotary input control device, which can generate ratchet damping hand feeling, resistance-constant hand feeling or resistance-free hand feeling when a user performs rotary input by magnetizing or demagnetizing an electro-permanent magnet, and has the advantages of simple structure and simple and convenient control.

Therefore, the invention provides the following technical scheme.

The present invention provides a rotary input control device, comprising:

a rotary input mechanism provided with a magnet;

an electropermanent magnet assembly comprising an electropermanent magnet and a coil; the coil is arranged on the electric permanent magnet to magnetize or demagnetize the electric permanent magnet when electrified;

and the control module is used for controlling the current of the coil so that the electro-permanent magnet is in a magnetizing state or a demagnetizing state.

Preferably, when the electric permanent magnet is in a magnetizing state, the magnetic field formed by the electric permanent magnet is coupled with the magnetic field formed by the magnet so as to change the resistance distribution of the rotation input mechanism when the rotation input mechanism rotates; when the electro-permanent magnet is in a demagnetized state, the resistance of the rotary input mechanism is constant or no resistance when the rotary input mechanism rotates.

Preferably, the electropermanent magnet is formed with at least two protrusions, and the at least two protrusions are arranged at intervals; the raised portion is configured to concentrate an electromagnetic field emitted by the electropermanent magnet when the coil is energized.

Preferably, the number of the magnets is at least two, the at least two magnets being arranged evenly spaced apart in the rotational direction of the rotational input mechanism; the projection is located opposite to a first circumferential track on which the at least two magnets are located in an axial direction of the rotary input mechanism.

Preferably, the rotary input mechanism comprises a metal ring, and the metal ring is of a soft magnetic structure; the magnet set up in on the metal ring, and be located the metal ring with between the electropermanent magnet subassembly.

Preferably, the electropermanent magnet comprises a body portion and two arcuate portions; the two bow-shaped parts are respectively positioned at two ends of the body part; the at least two convex parts are respectively arranged on the two arch parts.

Preferably, the number of projections on each of said arcuate portions is at least two; all of the protrusions on the electropermanent magnet form a second circumferential track, the first circumferential track and the second circumferential track being located opposite to each other in the axial direction; the central angle of two adjacent convex parts on the arch part is equal to the central angle of any two adjacent magnets.

Preferably, the number of the coils is two, and the two coils are respectively wound at the two ends of the body part.

Preferably, the electric permanent magnet is of a central symmetrical structure; and/or

The electropermanent magnet is a semi-hard magnet.

Preferably, the input control device further comprises:

a base;

a bearing provided in the base for supporting the rotation input mechanism.

Preferably, the control module comprises:

an input/output interface;

and the control unit comprises a magnetizing and demagnetizing controller and a driver, wherein the magnetizing and demagnetizing controller is electrically connected with the input and output interface and is used for controlling the driver to electrify the coil.

Preferably, the control module further comprises an energy storage unit, the energy storage unit comprising:

a capacitor energy storage array;

the energy storage controller is used for sending a power-on permission instruction to the charging and demagnetizing controller when the voltage of the capacitor energy storage array is within a preset voltage range; and conversely, the energy storage controller controls the capacitor energy storage array to charge.

The invention also provides a user input device comprising the rotary input control device.

The invention has the following technical effects:

the invention provides a rotary input control device, which magnetizes or demagnetizes an electropermanent magnet of an electropermanent magnet assembly through a control coil, changes the electromagnetic acting force generated by the electropermanent magnet on a magnet of a rotary input mechanism, and further changes the resistance distribution of the rotary input mechanism during rotation, so that ratchet wheel damping hand feeling, resistance constant hand feeling or resistance-free hand feeling can be generated when a user rotates and inputs, the structure is simple, and the control is simple and convenient. In addition, the input control device can be assembled into the user input equipment by adopting a patch scheme, so that the assembly is convenient.

Drawings

FIG. 1 is an exploded view of the rotary input control device of the present invention;

FIG. 2 is a partial perspective view of the rotational input assembly of the present invention;

FIG. 3 is a schematic view of an assembly structure of a magnet and a metal ring according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of the rotary input assembly of the present invention;

FIG. 5 is a schematic perspective view of an electropermanent magnet according to the present invention;

FIG. 6 is a schematic view of the magnetic field of an electropermanent magnet of the present invention in a charged state;

FIG. 7 is a side view of the coupled magnetic field lines of the rotary input assembly and the electropermanent magnet assembly of the present invention;

FIG. 8 is a top view of the coupling magnetic field lines of the rotary input assembly and the electropermanent magnet assembly of the present invention;

FIG. 9 is a cross-sectional view of the rotary input control device of the present invention;

FIG. 10 is a block diagram of a control module according to the present invention.

Description of the reference numerals

1. A rotary input mechanism;

11. a magnet; 12. a metal ring; 13. a knob; 14. a key section; 15. a main body portion;

2. an electro-permanent magnet assembly;

21. an electropermanent magnet; 211. a boss portion; 212. a body portion; 213. an arcuate portion; 22. a coil;

3. a control module; 31. an input/output interface; 311. a power input interface; 312. a control signal input interface; 313. a status output interface; 32. a control unit; 321. a magnetizing and demagnetizing controller; 322. a driver; 33. an energy storage unit; 331. a capacitor energy storage array; 332. an energy storage controller; 34. a detection unit;

4. a base;

5. and a bearing.

Detailed Description

In order to make the technical solutions and advantages of the present invention more comprehensible, the following description is given in detail by way of specific examples. Unless defined otherwise, technical and scientific terms used herein have the same meaning as those in the technical field to which this application belongs.

In the description of the present invention, unless otherwise expressly limited, the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in an orientation or positional relationship indicated in the drawings for ease of simplicity of description only and are not intended to indicate that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

In the present invention, the terms "first" and "second" are used for descriptive clarity only and are not to be construed as relative importance of the indicated features or number of the indicated technical features. Thus, a feature defined as "first" or "second" may expressly include at least one such feature. In the description of the present invention, "a plurality" means at least two; "several" means at least one; unless explicitly defined otherwise.

In the present invention, the terms "mounted," "connected," "secured," "disposed," and the like are to be construed broadly unless otherwise specifically limited. For example, "connected" may be fixedly connected, removably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the interconnection of two elements or through the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless expressly defined otherwise, the first feature may be "on", "above" and "above", "below", "beneath", "below" or "beneath" the second feature such that the first feature and the second feature are in direct contact, or the first feature and the second feature are in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the level of the first feature is higher than the level of the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser level than the second feature.

The rotary input control device of the present invention will be described in detail with reference to fig. 1 to 10.

In the present embodiment, the input control device includes a rotary input mechanism 1, an electropermanent magnet assembly 2, and a control module 3.

In the present embodiment, as shown in fig. 1 to 9, the rotation input mechanism 1 is provided with a magnet 11; the electropermanent magnet assembly 2 includes an electropermanent magnet 21 and a coil 22, the coil 22 being disposed on the electropermanent magnet 21. The control module 3 is used for controlling the energization state of the coil 22, so that the electro-permanent magnet 21 is in a magnetizing state or a demagnetizing state.

In the present embodiment, since the electro-permanent magnet 21 has two states of magnetization and demagnetization, the input control device can be assembled to the user input device by a patch scheme, which is convenient for assembly.

In one embodiment, when the electro-permanent magnet 21 is in a charged state, a magnetic field formed by the electro-permanent magnet 21 is coupled with the magnet 11, and in the process of rotating the rotation input mechanism 1, because the electromagnetic acting force generated by the electro-permanent magnet 21 on the magnet 11 is changed, the resistance distribution of the rotation input mechanism 1 can be changed, and a ratchet wheel damping hand feeling with different damping feelings is formed. When the electro-permanent magnet 21 is in a demagnetized state, the magnet 11 and the electro-permanent magnet 21 are in a decoupled state, and the resistance of the rotary input mechanism 1 is constant or no resistance when rotating. The user selects ratchet damping hand feeling, resistance constant hand feeling or resistance-free hand feeling by self according to the favor of rotating hand feeling, or matches a corresponding hand feeling mode according to a menu selected by the user on the user input equipment, the rotating hand feeling is diversified, the user experience feeling is better, and the rotating input control device is simple in structure and simple and convenient to control.

In one embodiment, magnet 11 is a hard magnetic structure.

In one embodiment, as shown in fig. 5, at least two protrusions 211 are formed on the electropermanent magnet 21, and the at least two protrusions 211 are spaced apart from each other; the raised portion 211 serves to concentrate the electromagnetic field emitted by the electropermanent magnet 21 when the coil 22 is energized. Specifically, when the electropermanent magnet 21 is in the magnetized state, both ends of the electropermanent magnet 21 constitute two magnetic poles of an N pole and an S pole, respectively. Both ends of the electropermanent magnet 21 are provided with the protrusions 211, or one end of the electropermanent magnet 21 is provided with the protrusions 211, so as to concentrate the electromagnetic field generated by the electropermanent magnet 21. Wherein the N and S poles of the electropermanent magnet 21 are as shown in fig. 6 to 8.

It should be understood that the electromagnetic field generated by the electropermanent magnet 21 may also be concentrated by dimensioning or other structural forms at both poles of the electropermanent magnet 21.

Further, as shown in fig. 2 to 4, the number of the magnets 11 is at least two, and at least two magnets are disposed at regular intervals in the rotational direction of the rotational input mechanism 1, that is, all the magnets 11 are evenly distributed along the first circumferential track. As shown in fig. 7 to 9, the first circumferential track of the protrusion 211 and the first circumferential track of the at least two magnets are opposite to each other in the axial direction of the rotation input mechanism, so that the distance between the magnet 11 and the protrusion 211 can be shortened, the electromagnetic force between the magnet 11 and the protrusion 211 can be enhanced when the electro-permanent magnet 21 is in the magnetizing state, and the hand feeling caused by the change of the resistance can be enhanced, and in addition, when the rotation input mechanism 1 stops rotating, at least one protrusion 211 can attract one magnet 11, so that the rotation input mechanism 1 can be stably in the stationary state. The number of magnets 11 may be two, three, four or even more.

Further, as shown in fig. 3, the rotary input mechanism 1 includes a metal ring 12, and the metal ring 12 is a soft magnetic structure; the magnet 11 is arranged on the metal ring 12 and is positioned between the metal ring 12 and the electropermanent magnet assembly 2. The metal ring 12 is arranged to play a role in fixing the magnet 11, and when the electric permanent magnet 21 is in a magnetizing state, the metal ring 12 has magnetism, so that an electromagnetic field generated by the electric permanent magnet 21 can be concentrated in an inner area of the metal ring 12 to enhance an electromagnetic acting force of the electric permanent magnet 21, and thus the electromagnetic acting force between the electric permanent magnet 21 and the magnet 11 is enhanced, and a magnetic conduction effect is achieved. When the electro-permanent magnet 21 is demagnetized, the metal ring 12 is not magnetic.

It should be understood that the circular metal ring 12 may be replaced by a square metal ring or other metal ring to fix the magnet 11 and to perform the function of magnetic conduction.

In one embodiment, as shown in fig. 5 and 6, the electropermanent magnet 21 includes a body portion 212 and two arcuate portions 213; the two arcuate portions 213 are respectively located at both ends of the body portion 212; at least two convex portions 211 are respectively provided on the two arcuate portions 213. It is understood that both ends of the body portion 212 may be provided with an elliptical portion, a square portion, or other shaped structure instead of the arcuate portion 213.

Further, the number of the convex portions 211 on each arcuate portion 213 is at least two; all the convex portions 211 on the electropermanent magnet 21 form a second circumferential track, and the first circumferential track and the second circumferential track are opposite in position in the axial direction; the central angle of two adjacent convex portions 211 on the arcuate portion 213 is equal to the central angle of any two adjacent magnets. By providing the positions of the protruding portions 211 and the positional relationship between two adjacent protruding portions 211 in this way, when the electro-permanent magnet 21 is in the magnetized state, a periodic distribution of resistance can be generated when the rotation input mechanism 1 rotates.

Specifically, when a certain magnet 11 is located at the middle of two adjacent convex portions 211 in the rotation direction of the magnet 11 when the electropermanent magnet 21 is in the magnet charging state, the electromagnetic forces applied to the magnet 11 by the two convex portions 211 are equal, and the electromagnetic force generated by the electropermanent magnet 21 to the rotation input mechanism 1 is in a balanced state, at this time, the tangential resistance received by the rotation input mechanism 1 is the minimum; when the rotation input mechanism 1 generates a tiny rotation, the balanced electromagnetic force is broken, and the rotation input mechanism 1 is pulled to the convex part 211 which is closer to the rotation input mechanism under the electromagnetic force until the convex part 211 is attracted to one magnet 11, as shown in fig. 8; when the rotation input mechanism 1 continues to rotate, the electromagnetic force of the electropermanent magnet 21 on the rotation input mechanism 1 gradually increases with the rotation of the rotation input mechanism 1, and at this time, the convex portion 211 is pulled toward the magnet 11 which is attracted to it before by the electromagnetic force. Therefore, the rotary input mechanism 1 generates periodically-changed resistance distribution when rotating, and ratchet wheel damping hand feeling is generated. When the electro-permanent magnet 21 is demagnetized, the periodic magnetic field disappears, and further the periodic resistance distribution disappears, at this time, the input control device is in an undamped or constant damping state.

Further, the number of the convex portions 211 on each of the arcuate portions 213 may be three, four or even more, and as shown in fig. 5 and 6, in order to provide a ratchet damping feel to the rotation input mechanism 1 while enabling the user to easily rotate the rotation input mechanism 1, the number of the convex portions 211 on each of the arcuate portions 213 is three.

In one embodiment, as shown in fig. 5 and 6, the number of the coils 22 is two, and the two coils 22 are wound around both ends of the body portion 212, respectively. When the two coils 22 are electrified with currents in the same direction, the electropermanent magnet 21 is in a magnetizing state; when the two coils 22 are energized with oscillating current, the electro-permanent magnet 21 returns to the demagnetized state. The electromagnetic acting force of the electropermanent magnet 21 is adjusted by changing the electrifying quantity of the coil 22, so that ratchet wheel damping hand feelings with different damping feelings are formed.

In one embodiment, as shown in fig. 5 and 6, the electropermanent magnet 21 has a central symmetric structure, which is advantageous for generating a uniform electromagnetic field. Two coils 22 are symmetrically arranged on the electropermanent magnet 21.

In one embodiment, the electropermanent magnet 21 is a semi-hard magnet, which does not generate magnetic flux leakage, does not need to calibrate the magnetic weakness of the electropermanent magnet assembly 2, and is easy to control by the input control device. The ratchet damping hand feeling is generated through the electromagnetic acting force, and the ratchet damping hand feeling is reliable and long in service life. In addition, only one semi-hard magnet is needed, the structure is simple, the number of parts is small, and the assembly is convenient.

In one embodiment, the electropermanent magnet 21 has an intrinsic coercivity of 1-20 kA/m.

In one embodiment, as shown in fig. 1, 4 and 9, the rotation input mechanism 1 includes a knob 13, and the knob 13 is rotated to input rotation information; the magnets 11 move in synchronism with the knob 13.

Further, as shown in fig. 1, the rotation input mechanism 1 includes a menu selection section 14 for inputting a menu selection signal. The menu selection unit 14 includes, but is not limited to, a key selection unit or a touch selection unit.

Further, the menu selection part 14 rotates in synchronization with the knob 13.

Further, as shown in fig. 1, 2 and 4, the rotation input mechanism 1 includes a main body portion 15, and the plurality of magnets 11 and the knob 13 are provided to the main body portion 15 to facilitate assembly.

In one embodiment, as shown in fig. 1 and 9, the input control device further includes a base 4 and a bearing 5, the bearing 5 being provided in the base 4 for stably supporting the rotation input mechanism 1. The rotation input mechanism can perform stable rotational movement with respect to the base 4 by the bearing 5. The bearing 5 has the characteristics of high stability, long service life, smooth rotation and the like, and can ensure the stability of an undamped mode and a constant damping mode.

Further, the rotation input mechanism 1 is connected to the bearing 5 through the body 15, and is rotatable with respect to the base 4 in cooperation with the bearing 5.

In one embodiment, as shown in fig. 10, the control module 3 includes an input/output interface 31 and a control unit 32, the control unit 32 includes a magnetizing/demagnetizing controller 321 and a driver 322, and the magnetizing/demagnetizing controller 321 is electrically connected to the input/output interface 31 and is used to control the driver 322 to energize the coil 22. The input/output interface 31 is used for communicating with an external device, after a user selects a hand feeling on the external device or the user input device matches a corresponding hand feeling mode according to a menu selected by the user, the hand feeling mode corresponds to a magnetizing instruction signal or a demagnetizing instruction signal and is input to the input/output interface 31, the input/output interface 31 transmits the signal to the magnetizing/demagnetizing controller 321, the magnetizing/demagnetizing controller 321 generates a pulse voltage signal with a specific polarity and duration or generates a bipolar pulse voltage signal with a characteristic frequency and amplitude to control the driver 322 to energize the coil 22, and then the electromagnetic magnet 21 is magnetized or demagnetized through the coil 22.

Further, the input/output interface 31 includes a power input interface 311, a control signal input interface, and a status output interface 312. The status output interface 312 is used to send a prompt to the user when an abnormality occurs in the control module 3. The control signal input interface is used for inputting a magnetizing instruction signal or a demagnetizing instruction signal.

Further, the magnetizing and demagnetizing controller 321 includes, but is not limited to, an MCU (micro controller Unit), a logic device, an active device, or a passive device.

In an embodiment, as shown in fig. 10, the control module 3 further includes an energy storage unit 33, and the energy storage unit 33 includes a capacitor energy storage array 331 and an energy storage controller 332. The energy storage controller 332 is configured to send a power-on permission instruction to the magnetizing and demagnetizing controller 321 when the voltage of the capacitor energy storage array 331 is within a preset voltage range; on the contrary, when the voltage of the capacitor energy storage array 331 exceeds the preset voltage range, the energy storage controller 332 controls the capacitor energy storage array 331 to charge, so as to ensure that the voltage of the capacitor energy storage array 331 can be stably maintained within the preset voltage range. When the control module 3 controls the electro-permanent magnet 21 to be magnetized or demagnetized, the influence of the magnetizing or demagnetizing operation on the input current is reduced by the energy storage controller 332.

Further, the energy storage unit 33 is also used to provide energy for the control unit 32.

In one embodiment, as shown in fig. 10, the control module 3 further includes a detection unit 34 for detecting the rotation angle of the rotation input mechanism 1.

Further, the detection unit 34 includes, but is not limited to, an optical encoder, a mechanical encoder, or a detection circuit.

The invention also provides a user input device comprising the rotary input control device. The rotary input control device provides a rotary input function for a user, and simultaneously can provide ratchet damping, undamped or constant damping rotary hand feeling for the user, so that the use experience of the user can be improved.

In particular, the user input device includes a handheld multimeter or any other device requiring rotational input.

It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations encompassed by the claims. Various modifications and changes may also be made on the basis of the above embodiments without departing from the scope of the present disclosure. Likewise, various features of the above embodiments may be arbitrarily combined to form additional embodiments of the present invention that may not be explicitly described. Therefore, the above examples only represent some embodiments of the present invention, and do not limit the scope of the present invention.

Claims

1. A rotary input control device, the input control device comprising:

a rotation input mechanism (1) provided with a magnet (11);

an electropermanent magnet assembly (2) comprising an electropermanent magnet (21) and a coil (22); the coil (22) is arranged on the electropermanent magnet (21) to magnetize or demagnetize the electropermanent magnet when electrified;

a control module (3) for controlling the current of the coil (22) such that the electro-permanent magnet (21) is in a magnetized state or a demagnetized state.

2. The rotary input control device of claim 1, wherein when the electropermanent magnet (21) is in a charged state, the magnetic field formed by it couples with the magnetic field formed by the magnet (11) to change the resistance profile of the rotary input mechanism (1) as the rotary input mechanism (1) rotates; when the electro-permanent magnet (21) is in a demagnetized state, the resistance of the rotation input mechanism (1) is constant or no resistance.

3. The rotary input control device according to claim 1, wherein the electropermanent magnet (21) has at least two protrusions (211) formed thereon, the at least two protrusions (211) being disposed at a spacing; the raised portion (211) is configured to concentrate the electromagnetic field emitted by the electropermanent magnet (21) when the coil (22) is energized.

4. The rotary input control device according to claim 3, wherein the number of magnets (11) is at least two, the at least two magnets being arranged evenly spaced apart in the direction of rotation of the rotary input mechanism (1); the convex portion (211) is located opposite to a first circumferential track where the at least two magnets are located in an axial direction of the rotation input mechanism.

5. The rotary input control device according to claim 4, wherein the rotary input mechanism (1) comprises a metal ring (12), the metal ring (12) being a soft magnetic structure; the magnet (11) is arranged on the metal ring (12) and is positioned between the metal ring (12) and the electric permanent magnet assembly (2).

6. The rotary input control device according to claim 4, wherein the electropermanent magnet (21) comprises a body portion (212) and two arcuate portions (213); the two arc-shaped parts (213) are respectively positioned at two ends of the body part (212); the at least two convex portions (211) are respectively arranged on the two arcuate portions (213).

7. The rotary input control device of claim 6, wherein the number of projections (211) on each arcuate portion (213) is at least two; all of the protrusions (211) on the electropermanent magnet (21) form a second circumferential track, the first and second circumferential tracks being located opposite in the axial direction; the central angle of two adjacent convex parts (211) on the arch part (213) is equal to that of any two adjacent magnets.

8. The rotary input control device of claim 6, wherein the number of the coils (22) is two, and the two coils (22) are wound around the two ends of the body portion (212), respectively.

9. The rotary input control device according to any one of claims 1 to 8, wherein the electropermanent magnet (21) is a centrosymmetric structure; and/or

The electropermanent magnet (21) is a semi-hard magnet.

10. The rotary input control device of any one of claims 1-8, further comprising:

a base (4);

a bearing (5) provided in the base for supporting the rotation input mechanism (1).

11. The rotary input control device according to any one of claims 1 to 8, wherein the control module (3) comprises:

an input/output interface (31);

a control unit (32) comprising a magnetizing and demagnetizing controller (321) and a driver (322), wherein the magnetizing and demagnetizing controller (321) is electrically connected with the input/output interface (31) and is used for controlling the driver (322) to electrify the coil (22).

12. The rotary input control device according to claim 11, wherein the control module (3) further comprises an energy storage unit (33), the energy storage unit (33) comprising:

a capacitor energy storage array (331);

an energy storage controller (332) for sending an instruction for allowing power-on to the magnetizing and demagnetizing controller (321) when the voltage of the capacitor energy storage array (331) is within a preset voltage range; conversely, the energy storage controller (332) controls the capacitor energy storage array (331) to charge.

13. A user input device comprising a rotary input control apparatus as claimed in any one of claims 1 to 12.