Rotary structure and electronic device

Abstract

The embodiment of the invention discloses a rotating structure and electronic equipment. Wherein the rotating structure comprises a shell, a rotating shaft, a magnetostriction assembly and a magnet, the rotating shaft is provided with an arc-shaped surface with curvature changes and is movably connected with the shell, and the magnetostriction assembly and the magnet are arranged in the shell. When the rotating structure works, the magnet is adopted to form a magnetic field, the arc-shaped surface with the curvature change is utilized to extrude the magnetostriction assembly, and the extruded magnetostriction assembly deforms and further changes the state of the magnetic field. The rotating state of the rotating shaft is reflected through the magnetic field change, the magnetic field state change is achieved through the magnetostriction assembly, the overall structure is simplified, occupied space is reduced, the magnetic field is slightly affected by the outside, and good stability and accuracy are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic devices, and particularly to a rotating structure and an electronic device. Background Art

[0002] The rotating structure is usually located on the side of the watch case, and a part of it extends outside the case. Users can perform functions such as time setting through pressing and rotating operations. In a smart watch, the rotating structure can also enhance the user experience and facilitate users to perform fine operations. Compared with directly operating on a small screen, using the rotating structure can achieve more precise control.

[0003] In order to better provide timely and accurate feedback on users' operations, existing rotating structures are usually designed using mechanical transmission, electronic induction principle or photoelectric induction principle. However, the rotating structures implemented using the above several principles are usually relatively complex and are easily affected by the environment. For example, mechanical transmission requires gear cooperation for transmission, the capacitive elements or resistive elements required by the electronic induction principle are easily affected by the environment, and the photoelectric induction principle requires ensuring that the laser light path is not blocked. Therefore, existing rotating structures often occupy a relatively large space and the adjustment accuracy is unstable. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a rotating structure and an electronic device, which simplify the structure, reduce the space occupation, and improve the adjustment stability and accuracy.

[0005] In a first aspect, an embodiment of the present invention provides a rotating structure, including:

[0006] A housing;

[0007] A rotating shaft, movably connected to the housing. One end of the rotating shaft extending into the housing forms a driving part, and one end of the rotating shaft located outside the housing forms a transmission part. The side surface of the driving part is an arc surface with a changing curvature;

[0008] A magnetostrictive component, disposed inside the housing. The side surface of the driving part contacts and presses the magnetostrictive component, causing the magnetostrictive component to deform;

[0009] A magnet, disposed inside the housing. The magnetostrictive component is located in the magnetic field of the magnet, and the magnetic field changes through the deformation of the magnetostrictive component.

[0010] Optionally, the magnetostrictive component includes a magnetostrictive block and a rigid block. The magnetostrictive block is fixed inside the housing, and the rigid block is fixed on the side of the magnetostrictive block facing the driving part.

[0011] Optionally, the rotating structure further includes a magnetic sensor disposed within the housing, and the magnetic sensor is located within the magnetic field of the magnet.

[0012] Optionally, a magnet groove is formed in the housing, and the magnet is disposed within the magnet groove.

[0013] Optionally, an adhesive layer is provided between the magnetostrictive component and the housing, and an adhesive layer is provided between the magnet and the housing.

[0014] Optionally, the rotating structure further includes:

[0015] An electrostrictive component disposed within the housing, the electrostrictive component being disposed opposite to an axial end of the driving portion, and the driving portion moves to press the electrostrictive component to cause deformation.

[0016] Optionally, the electrostrictive component includes a piezoelectric element and a piezoelectric circuit board, the piezoelectric element is electrically connected to the piezoelectric circuit board, the piezoelectric circuit board is installed within the housing, and the piezoelectric element is disposed on a side of the piezoelectric circuit board close to the axial end of the driving portion.

[0017] Optionally, an end face shape of the piezoelectric element is a spherical surface protruding toward the axial end of the driving portion, and the piezoelectric element corresponds to the axial end of the driving portion in position.

[0018] Optionally, the rotating structure further includes a second elastic member, the second elastic member is disposed between the electrostrictive component and the driving portion, and the second elastic member is connected within the housing.

[0019] Optionally, a convex block protrudes from an end of the driving portion close to the electrostrictive component, a deformed portion protruding toward the convex block is formed on the second elastic member, and the deformed portion corresponds to the convex block in position.

[0020] Optionally, the rotating structure further includes a first elastic member, the first elastic member connects the transmission portion and the first frame, a through hole is formed in the first frame, an inner diameter of the through hole is the same as an outer diameter of the transmission portion, and the transmission portion is movably disposed within the through hole and extends outside the through hole.

[0021] Optionally, an annular groove is formed on a side surface of the transmission portion, the annular groove is located on a side of the first frame close to the driving portion, the first elastic member includes an annular portion and two connecting portions, and the annular portion is rotatably disposed within the annular groove.

[0022] Optionally, two limiting frames are provided on the first frame, and the two connecting portions are respectively connected to the two limiting frames.

[0023] Optionally, the housing includes a first housing and a second housing which are oppositely arranged. The first housing includes a housing body and an extension cylinder that are internally connected. The extension cylinder is arranged on a side of the housing body away from the second housing. Part of the transmission part is rotatably arranged in the extension cylinder. The magnetostrictive assembly is arranged in the housing body, and the electrostrictive assembly is arranged in the second housing.

[0024] Optionally, a shaft hole is formed on a side of the housing body connected to the extension cylinder. The shaft hole communicates the extension cylinder with the housing body. The driving part penetrates through the shaft hole. The inner diameter of the shaft hole is smaller than the outer diameter of the transmission part and larger than the outer diameter of the driving part.

[0025] Optionally, the housing further includes a side connecting plate. A first connecting groove is formed on the outer side of the housing body, and a second connecting groove is formed on the inner side of the second housing. The first connecting groove and the second connecting groove are in corresponding positions. The side connecting plate is arranged in a space formed by the first connecting groove and the second connecting groove and connects the housing body and the second housing.

[0026] Optionally, a fixing block is arranged in the second housing, and the second elastic member is connected to the fixing block.

[0027] Optionally, a magnet groove is formed in the housing body. One side of the magnet groove facing the second housing has an opening. A positioning part extends from a side of the second housing facing the housing body. The positioning part extends into the magnet groove and presses on the magnet.

[0028] Optionally, a through groove is formed in the housing body. The through groove and the shaft hole communicate to form an open structure. An opening is formed on the side surface of the extension cylinder. The dimension of the opening in a direction perpendicular to the axial direction of the extension cylinder is smaller than the diameter of the extension cylinder.

[0029] Optionally, the magnet and the magnet groove are T-shaped.

[0030] In a second aspect, an embodiment of the present invention provides an electronic device, including:

[0031] A frame, the frame includes a first frame and a second frame. The first frame is connected to the second frame, and a through hole is formed in the first frame;

[0032] The rotating structure as described in the first aspect, the rotating structure is installed in a space formed by the first frame and the second frame, and the transmission part extends from the through hole to the outside of the first frame;

[0033] A control structure, installed in the second frame, and the control structure is electrically connected to the rotating structure.

[0034] An embodiment of the present invention provides a rotating structure and an electronic device. The rotating structure includes a housing, a rotating shaft, a magnetostrictive component, and a magnet. The rotating shaft is provided with an arc-shaped surface having a curvature change and is movably connected to the housing. The magnetostrictive component and the magnet are disposed inside the housing. When the rotating structure works, a magnetic field is formed by the magnet, and the magnetostrictive component is extruded by the arc-shaped surface having a curvature change. The extruded magnetostrictive component generates a deformation and further changes the magnetic field state. The rotation state of the rotating shaft is reflected by the magnetic field change, and the magnetostrictive component is provided to realize the change of the magnetic field state, which simplifies the overall structure, reduces the space occupation, and the magnetic field is less affected by the outside world, having better stability and accuracy. Description of the Drawings

[0035] Through the following description of the embodiments of the present invention with reference to the drawings, the above and other objects, features, and advantages of the present invention will become more clear. In the drawings:

[0036] Figure 1 is a front side structure schematic diagram of the rotating structure, the first circuit board, and the frame of an embodiment of the present invention;

[0037] Figure 2 is a rear side structure schematic diagram of the rotating structure, the first circuit board, and the frame of an embodiment of the present invention;

[0038] Figure 3 is an exploded structure schematic diagram of the rotating structure and the first frame of an embodiment of the present invention;

[0039] Figure 4 is a top surface sectional view of the rotating structure and the first frame of an embodiment of the present invention;

[0040] Figure 5 is a side surface sectional view of the rotating structure and the first frame of an embodiment of the present invention;

[0041] Figure 6 is a three-dimensional schematic diagram of the rotating structure after removing the rotating shaft of an embodiment of the present invention;

[0042] Figure 7 is a front view of the first housing of an embodiment of the present invention;

[0043] Figure 8 is an exploded structure schematic diagram of the rotating structure after removing the rotating shaft of an embodiment of the present invention;

[0044] Figure 9 is a three-dimensional schematic diagram of the rotating structure after removing the housing of an embodiment of the present invention.

[0045] Description of the Reference Numerals:

[0046] 1 - Outer shell; 11 - First outer shell; 111 - Housing; 112 - Extension tube; 113 - Through slot; 114 - Magnet slot; 115 - Shaft hole; 116 - Opening; 117 - First connection slot; 12 - Second outer shell; 121 - Fixed block; 122 - Piezoelectric slot; 123 - Positioning portion; 124 - Second connection slot; 13 - Side connection plate; 2 - Rotating shaft; 21 - Driving portion; 22 - Transmission portion; 221 - Ring groove; 23 - Projection; 3 - Magnetostrictive component; 31 - Magnetostrictive block; 32 - Rigid block; 4 - Magnet; 5 - Magnetic sensor; 61 - First circuit board; 62 - Second circuit board; 7 - Adhesive layer; 81 - Second elastic member; 811 - Deformation portion; 82 - Electro - strictive component; 821 - Piezoelectric element; 822 - Piezoelectric circuit board; 91 - First frame; 911 - Limiting frame; 912 - Through hole; 92 - Second frame; 93 - First elastic member; 931 - Annular portion; 932 - Connection portion. Detailed implementation mode

[0047] The following describes the present application based on embodiments, but the present application is not limited to these embodiments. In the following detailed description of the present application, some specific details are described in detail. Those skilled in the art can fully understand the present application without the description of these details. In order to avoid obscuring the essence of the present application, well - known methods, processes, flows, components, and circuits are not described in detail.

[0048] In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only, and the drawings are not necessarily drawn to scale.

[0049] Unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0050] For ease of explanation, spatially relative terms such as "inner", "outer", "beneath", "below", "lower", "above", "upper", etc. are used herein to describe the relationship of one element or feature illustrated in the figures to another element or feature. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as "below" or "beneath" another element or feature will then be oriented "above" that other element or feature. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0051] Unless the context clearly requires otherwise, the words such as "comprising", "including", etc. throughout the application shall be construed in an inclusive sense rather than an exclusive or exhaustive sense; that is, the meaning of "including but not limited to".

[0052] In the description of the present application, it should be understood that the terms "first", "second", etc. are used only for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0053] Due to the change in the magnetization state of the magnetic material, if the length becomes longer, the width will become smaller, but the change in its width is much smaller than the change in length. On the contrary, when such a magnetic material is subjected to mechanical stress, such as extrusion, a change in its internal magnetization state, such as a change in magnetic permeability, i.e., the inverse magnetostrictive effect, can also be called the piezomagnetic effect, will occur. Materials that work based on the above two effects are usually called magnetostrictive materials or piezomagnetic materials, such as ferrite piezomagnetic materials, iron-based amorphous piezomagnetic materials, ferromagnetic shape memory alloy piezomagnetic materials, Terfenol-D giant magnetostrictive materials (terbium dysprosium iron alloy), etc. The occurrence degree of the magnetostrictive positive reaction and the inverse reaction can be adjusted by specific material types, processes, etc. Usually, magnetostrictive metals are used to make devices such as piezomagnetic sensors.

[0054] Since structural defects always occur during the processing of materials, the interior of the material is actually inhomogeneous, which can cause magnetic field changes. The smallest unit of action is the magnetic domain, and the movement of magnetic domains leads to magnetic field changes. When magnetic domains move in a specified direction, they encounter magnetic domain walls, which prevent them from moving to the specified position. On the way back, they may also be blocked by another magnetic domain wall. Therefore, during the reciprocating process, they cannot fully return to the initial position. Further, due to the conductor characteristics of magnetostrictive metals, eddy currents are generated inside them, and the eddy currents further generate a reverse magnetic field, causing the actual magnetic induction intensity inside the magnetostrictive metal to lag behind the external magnetization magnetic field, resulting in energy loss. Therefore, finally, the intensity of the magnetic field that needs to be sensed by the magnetic sensor is much greater than the loss error range.

[0055] At the same time, an external magnetic field can also magnetize and assist the magnetostrictive metal, or an external magnetic field must magnetize the magnetostrictive metal. For example, it can increase the amplitude of the change in the state of the magnetostrictive metal due to changes in external conditions; improve the linearity of the magnetostrictive effect and the inverse magnetostrictive effect, making it more convenient for design and calculation; and accelerate the response speed of the magnetostrictive metal to changes in external conditions. This application uses the magnetostrictive effect of the magnetostrictive metal to determine the rotation angle of the rotating shaft in the rotating structure.

[0056] Electrostrictive materials can produce the electrostrictive effect, that is, when some dielectric materials are placed in an electric field, an elastic deformation phenomenon will occur, which is also called the inverse piezoelectric effect; correspondingly, when mechanical stress is applied to the electrostrictive material to cause deformation, the electrostrictive material will also generate a charge distribution to form a voltage, which is called the direct piezoelectric effect. This application uses the current generated when the electrostrictive material is pressed to achieve the transmission of electrical signals.

[0057] Electrostrictive materials include polymer electrostrictive metamaterials, ceramic electrostrictive materials, composite electrostrictive materials, etc. The commonly used electrostrictive material is piezoelectric ceramics. Before using piezoelectric ceramics, they need to be polarized to form an anisotropic structure by applying an external strong DC electric field. After removing the external electric field, the piezoelectric ceramics still retain the macroscopic polarization direction. When subjected to mechanical stress, charges are generated on the surface of the piezoelectric ceramics, that is, the direct piezoelectric effect is generated. Piezoelectric ceramics have strong adaptability. For example, in terms of mechanics, piezoelectric ceramics can withstand large stresses; in terms of chemistry, piezoelectric ceramics are inert and are not easily affected by the environment. According to different requirements, other impurities or chemical components can be added to piezoelectric ceramics to partially change their raw material ratios to diversify their properties.

[0058] Refer to Figure 1 - Figure 2 、 Figure 5, the rotating structure of the embodiment of the present invention includes a housing 1, a rotating shaft 2, a magnetostrictive component 3, and a magnet 4. Among them, the housing 1 isolates the main part of the rotating structure from other structures to avoid interference between structures. The rotating shaft 2 is movably connected to the housing 1, and one end of the rotating shaft 2 extends to the outside of the housing 1 to form a knob. In some embodiments, structures such as an adjustment cap can also be installed at the end of the rotating shaft 2 extending to the outside to make it more convenient for users to operate. When the user rotates the knob, the rotating shaft 2 is driven, and it squeezes the magnetostrictive component 3, causing it to deform and change the magnetic field state. The magnetostrictive component 3 is arranged inside the housing 1, contacts and squeezes with the rotating shaft 2 and generates deformation, producing the inverse magnetostrictive effect. The deformation causes the magnetostrictive component 3 to affect the magnetic field state. The magnet 4 is arranged inside the housing 1, provides a relatively stable magnetic field environment for the magnetostrictive component 3 within a certain range, and assists in magnetizing the magnetostrictive component 3, making the change in its internal magnetization state caused by the inverse magnetostrictive effect larger, thereby causing a more obvious change in the magnetic field state.

[0059] Refer to Figure 3 , Figure 4 , one end of the rotating shaft 2 extending into the housing 1 forms a driving part 21, and one end of the rotating shaft 2 located outside the housing 1 forms a transmission part 22. According to the actual situation, the diameters of the driving part 21 and the transmission part 22 are often different to facilitate the positioning of the rotating shaft 2. Under the condition of ensuring effective transmission of rotation, the driving part 21 and the transmission part 22 can be integrally formed or can be set as two components for assembly. The side surface of the driving part 21 is an arc surface with a changing curvature, which is used to drive the magnetostrictive component 3 to generate deformation. When the rotating shaft 2 rotates, the arc surface of the driving part 21 squeezes the magnetostrictive component 3 along the rotation direction. Since the curvatures of different positions of the arc surface are different, the magnetostrictive component 3 will also generate different amounts of deformation, thereby bringing different magnetic field changes. According to the change in the magnetic field state, the rotation state of the rotating shaft 2, such as the rotation direction, rotation length, rotation number of turns, etc., can be detected. According to the actual situation, the side surface of the driving part 21 can be various shapes with a changing curvature. Specifically, for a cross-section perpendicular to the axial direction, the side surface of the driving part 21 can form shapes such as a rounded triangle, a rounded quadrilateral, a petal shape, etc.

[0060] Refer to Figure 5, the magnetostrictive component 3 is disposed inside the housing 1. The side surface of the driving part 21 contacts and presses the magnetostrictive component 3, causing the magnetostrictive component 3 to deform. During the rotation of the rotating shaft 2, the magnetostrictive component 3 needs to always contact the side surface of the driving part 21. Therefore, the height of the magnetostrictive component 3 needs to be at least greater than the distance between the driving part 21 and the bottom surface of the magnetostrictive component 3 to ensure that the magnetostrictive component 3 can form a continuous feedback on the side surface of the driving part 21. According to the actual situation, on the premise of ensuring effective contact between the magnetostrictive component 3 and the side surface of the driving part 21, the magnetostrictive component 3 can be disposed at any position such as the bottom, top, or side of the housing 1, making the spatial layout more flexible and simplifying the overall structure.

[0061] Specifically, referring to Figure 5 , Figure 6 , Figure 7 , Figure 8 , the magnetostrictive component 3 includes a magnetostrictive block 31 and a rigid block 32. The magnetostrictive block 31 is fixed inside the housing 1, and the rigid block 32 is fixed on the side of the magnetostrictive block 31 facing the driving part 21. The magnetostrictive block 31 is made of magnetostrictive metal. After being extruded and deformed, the magnetization state inside it will change, further changing the physical state shown by the overall magnetic field, such as magnetic induction intensity, magnetic field intensity, etc. The rigid block 32 is disposed between the magnetostrictive block 31 and the side surface of the driving part 21 and protrudes above the top surface of the magnetostrictive block 31 by a part to prevent the driving part 21 from directly contacting the magnetostrictive block 31 and generating friction, resulting in rapid loss of the magnetostrictive block 31. Due to its rigid characteristics, the rigid block 32 can effectively transmit the extrusion brought by the driving part 21 to the magnetostrictive block 31, causing the magnetostrictive block 31 to generate corresponding deformation. That is to say, the top surface of the magnetostrictive block 31 never contacts the side surface of the driving part 21 during operation.

[0062] Specifically, the surface of the rigid block 32 is subjected to wear-resistant treatment to slow down its loss rate, and anti-magnetization treatment is carried out, such as wrapping magnetic shielding materials, etc., to prevent the rigid block 32 from being magnetized and affecting the magnetic field. Further, lubricating oil is applied to the surfaces of the rotating shaft 2 and the rigid block 32 for anti-oxidation treatment to reduce friction loss and oxidation loss. At the same time, considering that both the magnetostrictive block 31 and the rigid block 32 are stressed for a long time, therefore, they need to have good creep properties, that is, they can resist the ability of plastic deformation under the action of constant stress and specific temperature. Selecting materials with good creep properties to make the magnetostrictive block 31 and the rigid block 32 can further extend the service life of the rotating structure.

[0063] Referring to Figure 9, according to the actual situation, the sizes of the magnetostrictive block 31 and the rigid block 32 can be changed to match the shape of the side surface of the driving part 21 and the sensitivity requirements. For example, in the direction perpendicular to the axial direction of the rotating shaft 2, the rigid block 32 with a shorter length is more sensitive to the curvature change of the side surface of the driving part 21 because its surface can better extend into the concave part of the side surface of the driving part 21. The magnetostrictive block 31 is fixed in the housing 1 through the adhesive layer 7. According to the technological process, materials such as pressure-sensitive adhesive can be used to form the adhesive layer 7. Slots can also be opened in the housing 1 to limit the position of the magnetostrictive block 31 to prevent the rotation of the driving part 21 from causing its position to shift, which may affect the timely conduction of the extrusion of the rigid block 32 on the driving part 21. Its appropriate orientation can be selected according to specific experiments.

[0064] Refer to Figure 6 , to generate an external magnetic field, a magnet 4 is arranged in the rotating structure to make the generated magnetic field stable within a certain range. According to the actual situation, a permanent magnet is usually selected as the magnet 4 for generating the external magnetic field. The permanent magnet does not require external structures such as circuits to maintain its magnetism, reducing the space occupation. At the same time, after the magnetic field is formed, it is less affected by the outside world and has better stability and accuracy. The magnet 4 is arranged inside the housing 1, and a magnet slot 114 is opened in the housing 1, and the magnet 4 is arranged in the magnet slot 114. The magnet 4 is fixed through the adhesive layer 7. According to the technological process, materials such as pressure-sensitive adhesive can be used to form the adhesive layer 7. The shape of the magnet 4 is set according to the process requirements. In this embodiment, a T-shaped magnet 4 is used, and a T-shaped magnet slot 114 is opened to cooperate with it for limiting. It should be understood that the shape of the magnet 4 can also be bar-shaped, L-shaped, etc. The shape in the figure is only for illustration. The magnetostrictive assembly 3 is located in the magnetic field of the magnet 4, and the magnetic field changes through the deformation of the magnetostrictive assembly 3. In actual processes, in order to improve the intensity of the inverse magnetostrictive effect, experiments can be carried out to determine the optimal heat treatment magnetic field size and placement angle.

[0065] Refer to Figure 2 - Figure 5 , to obtain and analyze the changes generated by the magnetic field and give feedback to the user, the rotating structure further includes a magnetic sensor 5 to detect the changes in the magnetic field in a timely manner. The magnetic sensor 5 is arranged inside the housing 1 and is located in the magnetic field of the magnet 4 to monitor the changes in the magnetic field throughout the rotating structure. The magnetic sensor 5 is connected to structures such as a circuit board, wires, and metal pads through the adhesive layer 7 to facilitate the timely feedback of the obtained signals. The adhesive layer 7 can be formed by a pressure-sensitive adhesive. A suitable magnetic sensor 5 is selected according to the actual situation. For example, a Hall sensor is selected as the magnetic sensor 5 to detect the change in the magnetic induction intensity. Since the magnetic field generated by the permanent magnet is not completely constant, and considering the possible external influences and the slight disturbances caused by accidental touch, it is necessary for the control system in the main board to analyze the change in the magnetic flux. The signal of the magnetic flux change is transmitted to the main board through structures such as a circuit board, wires, and metal pads, and the control system in the main board judges the rotation state of the rotating shaft to reduce incorrect feedback.

[0066] Referring to Figure 9 , when the rotating shaft 2 rotates, the driving part 21 squeezes the rigid block 32, and the rigid block 32 further squeezes the magnetostrictive block 31 to deform it. The deformation of the magnetostrictive block 31 brings about a change in its internal magnetization state and affects the external magnetic field, causing a change in the overall magnetic field state detected by the magnetic sensor 5. Specifically, first, the magnet 4 magnetizes the magnetostrictive block 31, but at this time, the rigid block 32 does not participate in the magnetization process. When the user performs a rotation operation, the rotation is transmitted to the driving part 21 via the transmission part 22 of the rotating shaft 2. The rotation direction can be clockwise or counterclockwise, and the rotation has a non-linear speed change and is a continuous rotational motion. The movement range of the rotating shaft 2 cannot be adjusted, and its reciprocating motion is bidirectional.

[0067] Furthermore, referring to Figure 9 , the side surface of the driving part 21 is in close contact with the rigid block 32 and squeezes the magnetostrictive block 31 through it. The surface of the rigid block 32 is treated with wear resistance and anti-magnetization. Therefore, no non-contact force will be generated between the rotating shaft 2 and the rigid block 32, and only mechanical stress generated by their contact can deform the magnetostrictive block 31. According to the actual situation, the material of the rotating shaft 2 is also selected to be a material that will not be magnetized and will not generate non-contact forces with the rigid block 32 or other components. Since the cross-sectional pattern of the side surface of the driving part 21 in the direction perpendicular to the axial direction is determined, the rotation direction and rotation degree of the rotating shaft 2 can be inferred based on the change in the magnetic field state detected by the magnetic sensor 5. Different curvature positions on the side surface of the driving part 21 continuously squeeze the rigid block 32, causing the rigid block 32 to move in its height direction and further squeezing the magnetostrictive block 31 to deform it due to the transmission of force in a continuous medium. The deformation of the magnetostrictive block 31 generates the inverse magnetostrictive effect, changes the magnetization state inside the magnetostrictive block 31, and affects the external magnetic field, causing parameters such as the magnetic induction intensity of the overall magnetic field state to change. The magnetic sensor 5 detects the change in the magnetic field state, converts the change in the magnetic field state into an electrical signal, and transmits it to the main board through structures such as a circuit board and / or wires and metal pads. The control system in the main board judges the signal and finally decides whether to respond to this rotation.

[0068] In some embodiments, referring to Figure 4 - Figure 6 、 Figure 8, the rotating structure further includes an electrostrictive component 82 to realize the feedback of the rotating structure to the pressing operation. When a pressing operation is performed on the rotating shaft 2, the rotating shaft 2 moves to squeeze the electrostrictive component 82, causing it to generate the direct piezoelectric effect and resulting in a change in the charge distribution, forming a special electrical signal. The electrostrictive component 82 is disposed within the housing 1 and is oppositely arranged with respect to the axial end of the driving portion 21. The driving portion 21 moves to press the electrostrictive component 82 to cause deformation. During pressing, the entire rotating shaft 2 moves in the axial direction. Therefore, at this time, the motion type of the rotating shaft 2 is translational motion, which is a continuous motion with a non-linear speed, and the pressing motion is unidirectional, that is, in the direction towards the inside of the housing 1. The motion axis is along the axis of the rotating shaft 2, and the motion range is not adjustable.

[0069] Refer to Figure 5 , Figure 8 , the electrostrictive component 82 includes a piezoelectric element 821 and a piezoelectric circuit board 822, and the piezoelectric element 821 is electrically connected to the piezoelectric circuit board 822. The piezoelectric element 821 is the main element that generates the direct piezoelectric effect. According to the actual situation, different electrostrictive materials such as piezoelectric ceramics can be selected to make the piezoelectric element 821. Specifically, when piezoelectric ceramics are used as the electrostrictive material to make the piezoelectric element 821, by utilizing its direct piezoelectric effect and applying a force to the piezoelectric element 821, equal amounts of opposite charges are generated on the two surfaces determined by the piezoelectric element 821, that is, a potential difference is generated. By setting a reasonable circuit, it is possible to detect whether a signal is generated. Before being used as the piezoelectric element 821, the piezoelectric ceramics need to be polarized to make them exhibit piezoelectricity. Using piezoelectric ceramics as the electrostrictive material has low cost, simple structure, is less affected by dirt, is sensitive to transmitting continuous signals, can transmit signals when the displacement is small, and has a small torque, resulting in a smooth feel during rotation.

[0070] Refer to Figure 5 , Figure 8, when the piezoelectric component 821 is squeezed and deformed, a voltage is generated. This electrical signal is conducted outward to the main board through the piezoelectric circuit board 822 connected to the piezoelectric component 821, and the main board determines whether this operation is a press or a mis-touch. The piezoelectric circuit board 822 is installed inside the housing 1, and the piezoelectric component 821 is arranged on one side of the piezoelectric circuit board 822 close to the axial end of the driving part 21. Since it is necessary to capture the voltage or current generated by the piezoelectric component 821 in a timely manner, the piezoelectric circuit board 822 is arranged inside the housing 1. According to the actual situation, a piezoelectric groove 122 can be opened in the housing 1 to accommodate the piezoelectric circuit board 822, further reducing the space occupation. The piezoelectric circuit board 822 arranged in the piezoelectric groove 122 is welded and fixed to the piezoelectric component 821, and extends outward from the housing 1 to form a metal pad for welding and connecting with external circuit boards or flexible circuit boards and other structures to form the conduction of the circuit. According to the actual situation, when a piezoelectric ceramic is selected as the piezoelectric component 821, a ceramic circuit board is selected as the piezoelectric circuit board 822, and welding is carried out through a reflow soldering process. In some embodiments, the piezoelectric circuit board 822 can also be welded and fixed in the piezoelectric groove 122 to prevent the piezoelectric circuit board 822 and the piezoelectric component 821 from falling off due to multiple presses. By welding the piezoelectric component 821, the piezoelectric circuit board 822, and the metal pad, the circuit conduction is achieved, and the electrical signal generated by the direct piezoelectric effect can be conducted to the main board more timely.

[0071] Referring to Figure 4 - Figure 5 , Figure 9 , in order to provide a more sensitive feedback for the pressing operation, the end face shape of the piezoelectric component 821 is set as a spherical surface protruding towards the axial end of the driving part 21, and the piezoelectric component 821 corresponds to the axial end position of the driving part 21. When the driving part 21 is pressed and moves, the spherical surface of the end face of the piezoelectric component 821 will be squeezed from a point closest to the driving part 21, and as the driving part 21 moves further, more and more of the spherical surface is squeezed. Compared with the flat end face of the piezoelectric component 821, the spherical end face of the piezoelectric component 821 can amplify the degree of deformation generated when under pressure, achieving the effect of strengthening the direct piezoelectric effect. Correspondingly, a convex block 23 can also protrude at one end of the driving part 21 close to the electrostrictive component 821, and the end face of the convex block 23 can also be set as a spherical surface protruding towards the piezoelectric component 821, further increasing the degree of deformation generated when the piezoelectric component 821 is squeezed.

[0072] In some embodiments, referring to Figure 4 - Figure 5 , Figure 8 - Figure 9, the rotating structure further includes a second elastic member 81 disposed between the electrostrictive component 82 and the driving portion 21, and its edge is connected inside the housing 1. According to the actual situation, structures such as a fixing block 121 can be provided inside the housing 1 to fix the second elastic member 81, preventing it from being driven by the rotating shaft 2 to deviate from its original position and affecting the operation of the rotating structure. Since the rotating shaft 2 is movably disposed inside the housing 1, dirt and debris from the outside are likely to accumulate in the space where it is located, and the second elastic member 81 can separate the electrostrictive component 82 from the space where the rotating shaft 2 is located, preventing dirt from adhering to the surface of the piezoelectric member 821 and affecting its sensitivity. At the same time, the second elastic member 81 can also act as a buffer between the bump 23 and the piezoelectric member 821, preventing the ends of the piezoelectric member 821 and the bump 23 from wearing out too quickly.

[0073] According to the actual situation, referring to Figure 4 - Figure 5 , a deformed portion 811 protruding toward the bump 23 is formed on the second elastic member 81, and the deformed portion 811 corresponds to the position of the bump 23. The deformed portion 811 can further provide a buffering effect. When the bump 23 moves toward the piezoelectric member 821 due to pressing, it first contacts the deformed portion 811, and then drives the deformed portion 811 to protrude toward the piezoelectric member 821. The portion of the second elastic member 81 near the middle is driven to protrude accordingly until the bump 23 squeezes the deformed portion 811 into contact with the piezoelectric member 821 and transmits the pressure.

[0074] Since the rotating shaft 2 needs to be reset after the pressing operation, referring to Figure 3 - Figure 5 , the rotating structure further includes a first elastic member 93 for providing elastic force for the reset of the rotating shaft 2. The first elastic member 93 can be an elastic component such as a leaf spring or a ring spring. Taking the fixed external component in the extending direction of the rotating shaft 2 outward as the first frame 91, the first elastic member 93 connects the transmission portion 22 and the first frame 91, limits the transmission portion 22 and provides a reset elastic force. A through hole 912 is formed on the first frame 91, and the inner diameter of the through hole 912 is the same as the outer diameter of the transmission portion 22 to achieve a certain degree of limitation. The transmission portion 22 is movably disposed inside the through hole 912 and extends to the outside of the through hole 912. According to the actual situation, the portion of the transmission portion 22 extending to the outside of the through hole 912 can be connected to an additional structure such as an adjustment cap to improve the user experience.

[0075] In some embodiments, referring to Figure 3, a ring groove 221 is formed on the side surface of the transmission part 22, so that the transmission part 22 can be limited in the axial direction by the first elastic member 93, but is not affected by it in the circumferential direction. On the transmission part 22, the ring groove 221 is located on the side of the first frame 91 close to the driving part 21, avoiding exposure to the outside and reducing the influence of the environment on the first elastic member 93 in the ring groove 221. The first elastic member 93 includes an annular portion 931 and two connecting portions 932. The annular portion 931 is rotatably arranged in the ring groove 221 to limit the rotation shaft 2 in the axial direction, and the connecting portion 932 is used to fix the annular portion 931 to the first frame 91, so that the annular portion 931 can reset the rotation shaft 2 after the pressing operation. According to the actual situation, the annular portion 931 may be circular, C-shaped, U-shaped and other structures. Correspondingly, two limiting frames 911 are arranged on the first frame 91, so that the two connecting portions 932 can be respectively connected to the two limiting frames 911 to achieve fixation. According to the actual situation, three, four or one connecting portions 932 can also be set for fixation. During rotation, the annular portion 931 slides in the ring groove 221. Since the annular portion 931 and the transmission part 22 are not fixed in the circumferential direction, the rotation of the rotation shaft 2 will not cause the annular portion 931 to tighten or loosen.

[0076] Specifically, referring to Figure 3 - Figure 5 , when pressing, the user applies a force to the end of the rotation shaft 2 extending to the outside, and the entire rotation shaft 2 moves axially into the housing 1. The convex block 23 first contacts the deformation part 811, and further deforms the entire second elastic part. The second elastic part resists the movement of the convex block 23 to provide a certain buffer. At the same time, the annular portion 931 of the first elastic part is driven in the ring groove 221 and moves axially. The connecting portion 932 is still fixed in the limiting frame 911 of the first frame 91, that is, the first elastic part is stretched in the axial direction. As the rotation shaft 2 moves further, the convex block 23 continues to move and makes the deformation part 811 of the second elastic part contact the protruding end face of the piezoelectric element 821. The protruding end face of the piezoelectric element 821 is compressed and deformed, and due to the positive piezoelectric effect, a charge distribution is generated, converting mechanical energy into electrical energy to form an electrical signal. The piezoelectric circuit board 822 obtains this electrical signal and transmits it to the main board through an external circuit via a metal pad. The main board determines whether this operation is a press or a mis-touch according to the signal. After a pressing operation is completed, the external force applied by the user disappears, and the first elastic part rebounds. The annular portion 931 drives the rotation shaft 2 to move out of the housing 1 through the ring groove 221 to reset it. Considering that users often cannot perform completely rotational operations and point operations when using, for example, they may also perform extrusion during rotation, and the signals finally transmitted to the main board may simultaneously have rotation signals and press signals. At this time, the control system in the main board will analyze the signals to determine the actual operation and feedback requirements of the user.

[0077] In some embodiments, referring toFigure 8 The housing 1 includes a first housing 11 and a second housing 12 which are oppositely arranged to facilitate assembly in the process. According to the actual situation and the process flow, more components such as a third housing 1 or an integrally formed structure can be set. The first housing 11 includes a housing body 111 and an extension cylinder 112 that are internally connected. The housing body 111 is used to accommodate the rotating shaft 2, the magnetostrictive component 3, etc. The extension cylinder 112 provides limit and support for the rotating shaft 2 to prevent the rotating shaft 2 from tilting and causing the rotation process to get out of control. The extension cylinder 112 is arranged on the side of the housing body 111 away from the second housing 12, and part of the transmission part 22 is rotatably arranged in the extension cylinder 112. Since the extension cylinder 112 contacts the transmission part 22 and plays a limiting role, it is necessary to control the roughness and surface topography of the outer surface of the rotating shaft 2 and the inner surface of the extension cylinder 112 to reduce the loss caused by friction.

[0078] Refer to Figure 6 、 Figure 8 Specifically, in this embodiment, the magnetostrictive component 3 and the magnet 4 are arranged in the housing body 111, and the electrostrictive component 82 is arranged in the second housing 12. A magnet groove 114 is formed in the housing body 111 to accommodate the magnet 4, and an adhesive layer 7 can also be applied between the magnet 4 and the magnet groove 114 to achieve further fixation. The side of the magnet groove 114 facing the second housing 12 has an opening 116. A positioning part 123 is extended and arranged on the side of the second housing 12 facing the housing body 111. The positioning part 123 extends into the magnet groove 114 and is pressed above the magnet 4 to further fix the magnet 4 and prevent the magnet 4 from falling off due to the reduced viscosity of the adhesive layer 7. A fixing block 121 is arranged in the second housing 12, and at this time, the second elastic member 81 is connected to the fixing block 121 to achieve fixation. It should be understood that the foregoing position settings are only one possibility. The setting position of the magnetostrictive component 3 is not limited to the housing body 111, and the setting position of the electrostrictive component 82 is not limited to the second housing 12 either.

[0079] Refer to Figure 6 、 Figure 8 One side of the housing body 111 connected to the extension cylinder 112 is provided with a shaft hole 115. The shaft hole 115 connects the extension cylinder 112 and the housing body 111. The driving part 21 penetrates through the shaft hole 115. The inner diameter of the shaft hole 115 is smaller than the outer diameter of the transmission part 22 and larger than the outer diameter of the driving part 21. Due to the size of the shaft hole 115, an annular blocking plate is formed between the housing body 111 and the extension cylinder 112. When a pressing operation is performed, the transmission part 22 stops after contacting the surface of the blocking plate outside the shaft hole 115, so it plays a limiting role to prevent damage to the second elastic member 81 and the piezoelectric member 821 caused by excessive pressing.

[0080] In some embodiments, refer to Figure 3 、 Figure 6 、 Figure 8, the housing 1 further includes a side connecting plate 13 for connecting the first housing 11 and the second housing 12. A first connecting groove 117 is formed on the outer side of the housing 111 of the first housing 11, and a second connecting groove 124 is formed on the inner side of the second housing 12. The positions of the first connecting groove 117 and the second connecting groove 124 correspond to each other. The side connecting plate 13 is disposed in the space formed by the first connecting groove 117 and the second connecting groove 124 and connects the housing 111 and the second housing 12. According to the actual situation, the connection between the first housing 11, the second housing 12 and the side connecting plate 13 can be achieved by welding, gluing or other means. The number of the side connecting plates 13 can be one, two or more. The first housing 11, the side connecting plate 13 and the second housing 12 can be made of the same or different materials. For example, the first housing 11 can be made of a metal material, the second housing 12 can be made of a plastic material, and the side connecting plate 13 can be made of a metal material. It should be understood that the above material selection is only for example, and the materials of each component are not limited to the above materials.

[0081] In some embodiments, referring to Figure 7 , a through groove 113 is formed on the housing 111. The through groove 113 communicates with the shaft hole 115 to form an open structure, so as to facilitate the installation of the rotating shaft 2 in the process. An opening 116 is formed on the side surface of the extension cylinder 112. The dimension of the opening 116 in the direction perpendicular to the axial direction of the extension cylinder 112 is smaller than the diameter of the extension cylinder 112. Specifically, the cross section of the extension cylinder 112 in the direction perpendicular to the axial direction is a partial ring with a notch. The central angle corresponding to the ring is usually greater than a semicircle to prevent the rotating shaft 2 from falling out. Preferably, a partial ring with a central angle greater than three-quarters of the circle can be selected as the cross-sectional shape of the extension cylinder 112 in the direction perpendicular to the axial direction to better position the rotating shaft 2.

[0082] On this basis, an embodiment of the present invention further provides an electronic device. The electronic device includes a frame, a control structure, and the rotating structure as described above. Among them, the fixed external component in the extending direction of the rotating shaft 2 is the first frame 91. The frame includes the first frame 91 and the second frame 92, and the rotating structure is installed in the space formed by the first frame 91 and the second frame 92. It should be understood that the difference between the first frame 91 and the second frame 92 is only used to describe technical features, and the actual structure is not limited to the description of the first frame 91 and the second frame 92. The first frame 91 is connected to the second frame 92 to form an integral body. The first frame 91 is provided with a through hole 912, and the transmission part 22 extends from the through hole 912 to the outside of the first frame 91. According to the actual situation, structures such as an adjustment cap usually need to be additionally provided for the transmission part 22 extending to the outside of the first frame 91 to form a final knob. The control structure is installed in the second frame 92 and separated from the rotating structure to prevent the magnetic field in the rotating structure from affecting it, and further reduce the influence of external dirt on the control structure. According to the actual situation, integrated circuit structures such as chips, main boards, and circuit boards are usually arranged in the control structure, and a control system is carried to analyze and process the signals transmitted by the rotating structure. For example, a first circuit board 61 is arranged at a position close to the magnetic sensor 5, or the magnetic sensor 5 is pasted on the surface of the first circuit board 61 through an adhesive layer 7 and connected to the magnetic sensor 5 through a pad to timely obtain the magnetic field change detected by the magnetic sensor 5. Another example is that a second circuit board 62 is arranged at a position close to the piezoelectric circuit board 822, or the second circuit board 62 is installed outside the second housing 111 and connected to the piezoelectric circuit board 822 through a pad to timely obtain the current or voltage change captured by the piezoelectric circuit board 822. The control structure is electrically connected to the rotating structure to facilitate the timely transmission of signals.

[0083] An embodiment of the present application provides a rotating structure and an electronic device. A magnetic field is formed by a magnet, and a magnetostrictive component is extruded by an arc surface with a curvature change. The extruded magnetostrictive component generates deformation and further changes the magnetic field state. The rotation state of the rotating shaft is reflected by the magnetic field change, and a magnetostrictive component is set to realize the change of the magnetic field state, which simplifies the overall structure, reduces the space occupation, and the magnetic field is less affected by the outside world, having better stability and accuracy.

[0084] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various modifications and changes can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotating structure, characterized in that: The rotating structure comprises: Housing (1); A rotating shaft (2) is movably connected to the housing (1); one end of the rotating shaft (2) extending to the inside of the housing (1) forms a driving portion (21); one end of the rotating shaft (2) located outside the housing (1) forms a transmission portion (22); and a side surface of the driving portion (21) is an arc-shaped surface with a changing curvature; A magnetostrictive component (3) is arranged inside the housing (1), and a side surface of the driving part (21) contacts and presses the magnetostrictive component (3) so that the magnetostrictive component (3) is deformed; The magnet (4) is arranged inside the housing (1), and the magnetostrictive component (3) is located in the magnetic field of the magnet (4), and the magnetic field changes through the deformation of the magnetostrictive component (3).

2. The rotating structure according to claim 1, characterized in that: The magnetostrictive assembly (3) comprises a magnetostrictive block (31) and a rigid block (32); the magnetostrictive block (31) is fixed in the housing (1); and the rigid block (32) is fixed on a side of the magnetostrictive block (31) facing the driving part (21).

3. The rotating structure according to claim 1, characterized in that: The rotating structure further comprises a magnetic sensor (5) which is arranged in the housing, and the magnetic sensor (5) is located in the magnetic field of the magnet (4).

4. The rotating structure according to claim 1, characterized in that: A magnet slot (114) is provided in the housing (1), and the magnet (4) is arranged in the magnet slot (114).

5. The rotating structure according to claim 1, characterized in that: A glue layer (7) is provided between the magnetostrictive component (3) and the housing (1), and a glue layer (7) is provided between the magnet (4) and the housing (1).

6. The rotating structure according to claim 1, characterized in that: The rotating structure further comprises: The electrostrictive component (82) is arranged in the housing (1), and the electrostrictive component (82) is arranged opposite to the axial end of the driving part (21). The driving part (21) moves to press the electrostrictive component (82) to generate deformation.

7. The rotating structure according to claim 6, characterized in that: The electrostrictive component (82) comprises a piezoelectric component (821) and a piezoelectric circuit board (822); the piezoelectric component (821) is electrically connected to the piezoelectric circuit board (822); the piezoelectric circuit board (822) is installed in the housing (1); and the piezoelectric component (821) is arranged on one side of the piezoelectric circuit board (822) close to the axial end of the driving part (21).

8. The rotating structure according to claim 7, characterized in that: The end face shape of the piezoelectric element (821) is a spherical surface protruding toward the axial end of the driving portion (21), and the piezoelectric element (821) corresponds to the position of the axial end of the driving portion (21).

9. The rotating structure according to claim 6, characterized in that: The rotating structure further comprises a second elastic member (81), wherein the second elastic member (81) is arranged between the electrostrictive component (82) and the driving part (21), and the second elastic member (81) is connected to the inside of the housing (1).

10. The rotating structure according to claim 9, characterized in that: A convex block (23) is protruded from one end of the driving part (21) close to the electrostrictive component (82), and a deformation part (811) protruding toward one side of the convex block (23) is formed on the second elastic member (81), and the deformation part (811) corresponds to the position of the convex block (23).

11. The rotating structure according to claim 1, characterized in that: The rotating structure further comprises a first elastic member (93), wherein the first elastic member (93) connects the transmission part (22) and the first frame (91); a through hole (912) is provided on the first frame (91); the inner diameter of the through hole (912) is the same as the outer diameter of the transmission part (22); the transmission part (22) is movably arranged in the through hole (912) and extends to the outside of the through hole (912).

12. The rotating structure according to claim 11, characterized in that: The side surface of the transmission part (22) is provided with an annular groove (221), and the annular groove (221) is located on a side of the first frame (91) close to the driving part (21). The first elastic member (93) comprises an annular portion (931) and two connecting portions (932), and the annular portion (931) is rotatably arranged in the annular groove (221).

13. The rotating structure according to claim 12, characterized in that: Two limiting frames (911) are arranged on the first frame (91), and the two connecting parts (932) are respectively connected to the two limiting frames (911).

14. The rotating structure according to claim 9, characterized in that: The housing (1) comprises a first housing (11) and a second housing (12) which are arranged opposite to each other, the first housing (11) comprising a shell (111) and an extension tube (112) which are internally connected, the extension tube (112) being arranged on a side of the shell (111) away from the second housing (12), a part of the transmission part (22) being rotatably arranged in the extension tube (112), the magnetostrictive component (3) being arranged in the shell (111), and the electrostrictive component (82) being arranged in the second housing (12).

15. The rotating structure according to claim 14, characterized in that: An axial hole (115) is provided on one side where the shell (111) is connected to the extension tube (112). The axial hole (115) connects the extension tube (112) and the shell (111). The driving part (21) passes through the axial hole (115). The inner diameter of the axial hole (115) is smaller than the outer diameter of the transmission part (22) and larger than the outer diameter of the driving part (21).

16. The rotating structure according to claim 14, characterized in that: The shell (1) further comprises a side connecting plate (13); a first connecting groove (117) is provided on the outer side of the shell (111); a second connecting groove (124) is provided on the inner side of the second shell (12); the first connecting groove (117) and the second connecting groove (124) correspond in position to each other; the side connecting plate (13) is arranged in a space formed by the first connecting groove (117) and the second connecting groove (124) and connects the shell (111) and the second shell (12).

17. The rotating structure according to claim 14, characterized in that: A fixing block (121) is provided inside the second housing (12), and the second elastic member (81) is connected to the fixing block (121).

18. The rotating structure according to claim 14, characterized in that: A magnet slot (114) is provided in the shell (111), and the magnet slot (114) has an opening on a side facing the second shell (12). A positioning portion (123) is extended on a side of the second shell (12) facing the shell (111), and the positioning portion (123) is extended in the magnet slot (114) and crimped onto the magnet (4).

19. The rotating structure according to claim 15, characterized in that: The shell (111) is provided with a through groove (113), the through groove (113) is connected with the shaft hole (115) to form an open structure, and the side of the extension tube (112) is provided with an opening (116), and the size of the opening (116) in a direction perpendicular to the axial direction of the extension tube (112) is smaller than the diameter of the extension tube (112).

20. The rotating structure according to claim 18, characterized in that: The magnet (4) and the magnet slot (114) are T-shaped.

21. An electronic device, characterized in that: The electronic device comprises: A frame, the frame comprising a first frame (91) and a second frame (92), the first frame (91) being connected to the second frame (92), and the first frame (91) being provided with a through hole (912); The rotating structure according to any one of claims 1 to 20, wherein the rotating structure is installed in a space formed by the first frame (91) and the second frame (92), and the transmission part (22) extends from the through hole (912) to the outside of the first frame (91); A control structure is installed in the second frame (92), and the control structure is electrically connected to the rotating structure.

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