Rotary structure and electronic device

Abstract

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

Description

Technical Field

[0001] This utility model relates to the field of electronic equipment technology, specifically to a rotating structure and an electronic device. Background Technology

[0002] The rotating mechanism is typically located on the side of the watch frame, with a portion extending outside the frame. Users can perform functions such as setting the time by pressing and rotating it. In smartwatches, the rotating mechanism also enhances the user experience, facilitating fine-tuning and allowing for more precise control compared to operating directly on the small screen.

[0003] To provide better and more accurate feedback to user operations, existing rotating structures are typically designed using mechanical transmission, electronic sensing, or photoelectric sensing principles. However, rotating structures implemented using these principles are usually quite complex and easily affected by the environment. For example, mechanical transmission requires gears, electronic sensing requires capacitors or resistors that are susceptible to environmental influences, and photoelectric sensing requires ensuring the laser beam path is unobstructed. Therefore, existing rotating structures often occupy a large amount of space and their adjustment accuracy is unstable. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a rotating structure and electronic device that simplifies the structure, reduces space occupation, and improves adjustment stability and accuracy.

[0005] In a first aspect, embodiments of the present invention provide a rotating structure, comprising:

[0006] frame;

[0007] A camshaft is movably connected to the frame. The camshaft includes a drive part and a transmission part. The drive part is connected to the transmission part. The drive part extends into the interior of the frame. The transmission part is located outside the frame. The side surface of the drive part has at least one protrusion in a direction perpendicular to the axial direction. The maximum diameter of the drive part is smaller than the diameter of the transmission part.

[0008] A magnetic piezomagnetic assembly is disposed inside the frame, and the side surface of the drive unit contacts and presses against the magnetic piezomagnetic assembly, causing the magnetic piezomagnetic assembly to deform.

[0009] A magnet is disposed inside the frame, and the piezomagnetic component is located within the magnetic field of the magnet. The magnetic field changes through the deformation of the piezomagnetic component.

[0010] Optionally, the magnetic assembly includes a magnetic block and a rigid block, the magnetic block being fixed within the frame, and the rigid block being fixed to the side of the magnetic block facing the drive unit.

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

[0012] Optionally, a magnet slot is provided within the frame, and the magnet is disposed within the magnet slot.

[0013] Optionally, the rotating structure further includes:

[0014] A piezoelectric component is disposed within the frame, and the piezoelectric component is disposed opposite to the axial end of the drive unit. The drive unit moves and presses the piezoelectric component to generate deformation.

[0015] Optionally, the piezoelectric assembly 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 mounted in the frame, and the piezoelectric element is disposed on the side of the piezoelectric circuit board near the axial end of the drive unit.

[0016] Optionally, the end face of the piezoelectric element is a spherical surface that protrudes toward the axial end of the drive unit, and the piezoelectric element corresponds to the axial end of the drive unit.

[0017] Optionally, the rotating structure further includes a second elastic element disposed between the piezoelectric assembly and the driving part, and the second elastic element is connected within the frame.

[0018] Optionally, the driving part has a pressing block protruding at one end near the piezoelectric component, and the second elastic member has a deformable part protruding toward the pressing block, the deformable part corresponding to the position of the pressing block.

[0019] Optionally, the rotating structure further includes a first elastic element, which connects the transmission part and the first frame. The first frame has a through hole with the same inner diameter as the outer diameter of the transmission part. The transmission part is movably disposed in the through hole and extends to the outside of the through hole.

[0020] Optionally, the transmission part has an annular groove on its side surface, the annular groove being located on the side of the first frame near the drive part, and the first elastic member including an annular part and two connecting parts, the annular part being rotatably disposed in the annular groove.

[0021] Optionally, the first frame is provided with two limiting frames, and the two connecting parts are respectively connected to the two limiting frames.

[0022] Optionally, the frame includes a first frame and a second frame disposed opposite to each other. The first frame includes a housing and an extension tube that are internally connected. The extension tube is disposed on the side of the housing away from the second frame. Part of the transmission part is rotatably disposed in the extension tube. The piezoelectric component is disposed in the housing. The piezoelectric component is disposed in the second frame.

[0023] Optionally, a shaft hole is provided on the side of the housing connected to the extension cylinder, the shaft hole connects the extension cylinder and the housing, the drive unit passes through the shaft hole, and the inner diameter of the shaft hole is smaller than the outer diameter of the transmission unit and larger than the outer diameter of the drive unit.

[0024] Optionally, a magnet groove is provided inside the housing, the magnet groove has an opening on the side facing the second frame, and a positioning part is provided on the side of the second frame facing the housing. The positioning part extends into the magnet groove and presses against the magnet.

[0025] Optionally, the housing has a through groove that communicates with the shaft hole to form an open structure, and the extension cylinder has an opening on its side. The size of the opening in the direction perpendicular to the axial direction of the extension cylinder is smaller than the diameter of the extension cylinder.

[0026] Secondly, embodiments of the present invention provide an electronic device, comprising:

[0027] The rack includes a first rack and a second rack, the first rack being connected to the second rack, and the first rack having through holes;

[0028] As described in the first aspect, the rotating structure is installed in the 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;

[0029] A control structure is installed inside the second frame, and the control structure is electrically connected to the rotating structure.

[0030] This invention provides a rotating structure and an electronic device. The rotating structure includes a frame, a camshaft, a magnetic diaphragm assembly, and a magnet. The camshaft has an arc-shaped surface with varying curvature and is movably connected to the frame. The magnetic diaphragm assembly and the magnet are disposed inside the frame. During operation, the magnet generates a magnetic field, and the arc-shaped surface with varying curvature compresses the magnetic diaphragm assembly. The compressed magnetic diaphragm assembly deforms, further altering the magnetic field state. By reflecting the camshaft's rotational state with changes in the magnetic field and using the magnetic diaphragm assembly to achieve these changes, the overall structure is simplified, space is reduced, and the magnetic field is less affected by external influences, exhibiting good stability and accuracy. Attached Figure Description

[0031] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0032] Figure 1 This is a schematic diagram of the rotating structure, the first circuit board, and the frame according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the rotating structure, the first circuit board, and the rear structure of the frame according to an embodiment of the present invention;

[0034] Figure 3 This is an exploded view of the rotating structure and the first frame according to one embodiment of the present invention;

[0035] Figure 4 This is a top cross-sectional view of the rotating structure and the first frame according to an embodiment of the present invention;

[0036] Figure 5 This is a side cross-sectional view of the rotating structure and the first frame according to an embodiment of the present invention;

[0037] Figure 6 This is a three-dimensional schematic diagram of the rotating structure after removing the camshaft according to an embodiment of the present invention;

[0038] Figure 7 This is a front view of the first frame of an embodiment of the present invention;

[0039] Figure 8 This is an exploded structural diagram of the rotating structure after removing the camshaft according to an embodiment of the present invention;

[0040] Figure 9 This is a three-dimensional schematic diagram of the rotating structure after removing the frame according to an embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1-Frame; 11-First frame; 111-Housing; 112-Extension tube; 113-Through groove; 114-Magnet groove; 115-Shaft hole; 116-Opening; 117-First mounting groove; 12-Second frame; 121-Fixing block; 122-Piezoelectric groove; 123-Positioning part; 124-Second mounting groove; 13-Side mounting plate; 2-Camshaft; 21-Drive part; 22-Transmission part; 221-Annular groove; 23-Pressing block; 3- Magnetic assembly; 31-Magnetic block; 32-Rigid block; 4-Magnet; 5-Magnetic sensor; 61-First circuit board; 62-Second circuit board; 7-Adhesive layer; 81-Second elastic element; 811-Deformable part; 82-Piezoelectric assembly; 821-Piezoelectric element; 822-Piezoelectric circuit board; 91-First frame; 911-Limiting frame; 912-Through hole; 92-Second frame; 93-First elastic element; 931-Annular part; 932-Connecting part. Detailed Implementation

[0043] The present application is described below based on embodiments, but it is not limited to these embodiments. In the detailed description of the present application below, certain specific details are described in detail. Those skilled in the art can fully understand the present application without these details. To avoid obscuring the substance of the present application, well-known methods, processes, flows, elements, and circuits are not described in detail.

[0044] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0045] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] For ease of explanation, spatially related terms such as “inside,” “outside,” “below,” “below,” “lower,” “above,” “upper,” etc., are used herein to describe the relationship between one element or feature illustrated in the figure and another. It will be understood that spatially related terms may be intended to encompass different orientations of the device in use or operation besides those depicted in the figure. For example, if the device in the figure is flipped, an element described as “below” or “below” another element or feature would then be positioned “above” that other element or feature. Thus, the exemplified term “below” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially related descriptive terms used herein should be interpreted accordingly.

[0047] Unless the context explicitly requires it, words such as "including" or "contains" throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to".

[0048] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0049] Due to changes in the magnetization state, a magnetic material that increases in length will have a smaller width, although the change in width is much smaller than the change in length. Conversely, when subjected to mechanical stress, such as compression, these magnetic materials will undergo changes in their internal magnetization state, such as a change in permeability, a phenomenon known as inverse magnetostriction, or piezomagnetic effect. Materials operating based on these two effects are generally called magnetostrictive or piezomagnetic materials, such as ferrite piezomagnetic materials, iron-based amorphous piezomagnetic materials, ferromagnetic shape memory alloy piezomagnetic materials, and Terfenol-D supermagnetostrictive materials (terbium-dysprosium iron alloy). The degree of occurrence of the forward and reverse magnetostrictive reactions can be adjusted through specific material types and processes. Magnetostrictive metals are commonly used to fabricate piezomagnetic sensors and other devices.

[0050] Because structural defects inevitably occur during material processing, the material's internal structure is inherently non-uniform, causing changes in the magnetic field. The smallest unit of this interaction is the magnetic domain. The movement of these domains leads to changes in the magnetic field. When a domain moves in a specific direction, it encounters a domain wall, preventing it from reaching its intended position. On its return journey, it may also encounter another domain wall, thus preventing it from completely returning to its initial position during the reciprocating process. Furthermore, the conductive properties of magnetostrictive metals generate eddy currents within them. These eddy currents further produce a reverse magnetic field, causing the actual magnetic induction intensity inside the magnetostrictive metal to lag behind the external magnetizing magnetic field, resulting in energy loss. Therefore, the magnetic field strength ultimately needs to be much greater than the loss error range that the magnetic sensor detects.

[0051] Simultaneously, an external magnetic field can also assist in magnetizing the magnetostrictive metal, or an external magnetic field is necessary to magnetize the magnetostrictive metal. For example, it can increase the magnitude of the change in the state of the magnetostrictive metal caused by changes in external conditions; improve the linearity of the magnetostrictive and inverse magnetostrictive effects, making them easier to design and calculate; 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 camshaft in a rotating structure.

[0052] Electrostrictive materials can produce the electrostrictive effect, which is the phenomenon of elastic deformation that occurs when certain dielectric materials are placed in an electric field; this is also known as the inverse piezoelectric effect. Correspondingly, when mechanical stress is applied to an electrostrictive material, causing it to deform, the material will also generate a charge distribution, forming a voltage; this is known as the direct piezoelectric effect. This application uses the current generated by pressing an electrostrictive material to transmit electrical signals.

[0053] Electrostrictive materials include polymer electrostrictive metamaterials, ceramic electrostrictive materials, and composite electrostrictive materials, with piezoelectric ceramics being the most commonly used. Before using piezoelectric ceramics, they need to be polarized by applying an external strong DC electric field to create an anisotropic structure. After removing the external electric field, the piezoelectric ceramic retains its macroscopic polarization direction. When subjected to mechanical stress, a charge is generated on the surface of the piezoelectric ceramic, resulting in the positive piezoelectric effect. Piezoelectric ceramics have strong adaptability; for example, mechanically, they can withstand large stresses; chemically, they are inert and not easily affected by the environment. Depending on the requirements, other impurities or chemical components can be added to the piezoelectric ceramic to partially change its raw material ratio, thus diversifying its properties.

[0054] Reference Figures 1-2 , Figure 5The rotating structure of this embodiment includes a frame 1, a camshaft 2, a magnetizing assembly 3, and a magnet 4. The frame 1 isolates the main body of the rotating structure from other structures, preventing interference. The camshaft 2 is movably connected to the frame 1, with one end extending outside the frame 1 to form a knob. In some embodiments, an adjustment cap or similar structure can be added to the external end of the camshaft 2 for easier user operation. When the user rotates the knob, the camshaft 2 is driven, compressing the magnetizing assembly 3 and causing it to deform, thus altering the magnetic field state. The magnetizing assembly 3, located inside the frame 1, contacts and deforms the camshaft 2, generating a contramagnetic-strictive effect, which influences the magnetic field state. The magnet 4, located inside the frame 1, provides a relatively stable magnetic field environment within a certain range for the magnetizing assembly 3 and assists in magnetizing it, resulting in a greater change in its internal magnetization state due to the contramagnetic-strictive effect, thereby causing a more significant change in the magnetic field state.

[0055] Reference Figure 3 , Figure 4 The camshaft 2 extends into the frame 1 at one end to form a drive section 21, and the camshaft 2 extends out of the frame 1 to form a transmission section 22. Depending on the actual situation, the drive section 21 and the transmission section 22 can be integrally formed or assembled as two parts, provided that rotation can be effectively transmitted. The side surface of the drive section 21 has at least one protrusion perpendicular to the axial direction; that is, the side surface of the drive section 21 is an arc-shaped surface with varying curvature, used to drive the magnetic actuator 3 to deform. Furthermore, to position the camshaft 2, the maximum diameter of the drive section 21 is smaller than the diameter of the transmission section 22. In other words, by limiting the transmission section 22, the axial movement of the entire camshaft 2 can be restricted. When the camshaft 2 rotates, the arc-shaped surface of the drive section 21 presses against the magnetic actuator 3 along the rotation direction. Because the curvature of the arc-shaped surface varies at different locations, the magnetic actuator 3 will also produce different deformations, resulting in different changes in the magnetic field. Based on the changes in the magnetic field state, the rotational state of the camshaft 2, such as the rotation direction, rotation length, and number of rotations, can be detected. Depending on the actual situation, the side surface of the drive unit 21 can be of various shapes with varying curvature. Specifically, for a cross-section perpendicular to the axial direction, the side surface of the drive unit 21 can be formed into a rounded triangle, a rounded quadrilateral, a petal shape, or other shapes.

[0056] Reference Figure 5The magnetic diaphragm assembly 3 is disposed inside the frame 1. The side surface of the drive unit 21 contacts and presses against the magnetic diaphragm assembly 3, causing the magnetic diaphragm assembly 3 to deform. During the rotation of the camshaft 2, the magnetic diaphragm assembly 3 needs to maintain constant contact with the side surface of the drive unit 21. Therefore, the height of the magnetic diaphragm assembly 3 must be at least greater than the distance between the drive unit 21 and the bottom surface of the magnetic diaphragm assembly 3 to ensure that the magnetic diaphragm assembly 3 can provide continuous feedback to the side surface of the drive unit 21. Depending on the actual situation, provided that the magnetic diaphragm assembly 3 can effectively contact the side surface of the drive unit 21, the magnetic diaphragm assembly 3 can be disposed at any position such as the bottom, top, or side of the frame 1, making the spatial layout more flexible and simplifying the overall structure.

[0057] Specifically, refer to Figure 5 , Figure 6 , Figure 7 , Figure 8 The magnetic accelerometer assembly 3 includes a magnetic block 31 and a rigid block 32. The magnetic block 31 is fixed inside the frame 1, and the rigid block 32 is fixed on the side of the magnetic block 31 facing the drive unit 21. The magnetic block 31 is made of magnetostrictive metal. After being compressed and deformed, its internal magnetization state changes, further altering the overall physical state of the magnetic field, such as magnetic induction intensity and magnetic field strength. The rigid block 32 is positioned between the magnetic block 31 and the side surface of the drive unit 21, and extends slightly above the top surface of the magnetic block 31 to prevent direct contact between the drive unit 21 and the magnetic block 31, thus avoiding friction and rapid wear of the magnetic block 31. Due to its rigidity, the rigid block 32 effectively transmits the compression from the drive unit 21 to the magnetic block 31, causing it to deform accordingly. In other words, the top surface of the magnetic block 31 never contacts the side surface of the drive unit 21 during operation.

[0058] Specifically, the surface of the rigid block 32 undergoes wear-resistant treatment to slow down its wear rate, and is subjected to anti-magnetization treatment, such as wrapping it with magnetic shielding material, to prevent the rigid block 32 from affecting the magnetic field after being magnetized. Furthermore, the surfaces of the camshaft 2 and the rigid block 32 are coated with lubricating oil for anti-oxidation treatment to reduce frictional and oxidation losses. Meanwhile, considering that both the magnetic pressing block 31 and the rigid block 32 are subjected to stress for extended periods, they need to have good creep properties, i.e., the ability to resist plastic deformation under constant stress and specific temperature. Using materials with good creep properties to manufacture the magnetic pressing block 31 and the rigid block 32 can further extend the service life of the rotating structure.

[0059] Reference Figure 9Depending on the actual situation, the dimensions of the magnetic block 31 and the rigid block 32 can be changed to match the shape of the side surface of the drive unit 21 and the sensitivity requirements. For example, in the direction perpendicular to the axial direction of the camshaft 2, the shorter rigid block 32 is more sensitive to changes in the curvature of the side surface of the drive unit 21 because its surface can better extend into the concave part of the side surface of the drive unit 21. The magnetic block 31 is fixed in the frame 1 by the adhesive layer 7, which can be formed using materials such as pressure-sensitive adhesive according to the process flow. A slot can also be opened in the frame 1 to limit the magnetic block 31, preventing its position from shifting due to the rotation of the drive unit 21, which would affect the timely transmission of the pressure of the rigid block 32 on the drive unit 21. The appropriate orientation can be selected according to the specific experiment.

[0060] Reference Figure 6 To generate an external magnetic field, a magnet 4 is placed in the rotating structure, and the magnetic field it generates is stabilized within a certain range. Depending on the actual situation, a permanent magnet is usually chosen as the magnet 4 to generate the external magnetic field. Permanent magnets do not require external circuitry or other structures to maintain their magnetism, reducing space occupation. At the same time, the magnetic field is less affected by external factors after it is formed, exhibiting better stability and accuracy. The magnet 4 is placed inside the frame 1, and a magnet slot 114 is formed within the frame 1, within which the magnet 4 is placed. The magnet 4 is fixed by an adhesive layer 7, which can be formed using pressure-sensitive adhesive or other materials according to the process flow. The shape of the magnet 4 is set according to process requirements; in this embodiment, a T-shaped magnet 4 is used, with a T-shaped magnet slot 114 provided to cooperate with it for positioning. It should be understood that the shape of the magnet 4 can also be strip-shaped, L-shaped, etc.; the shapes in the figure are only illustrative. The piezoelectric component 3 is located within the magnetic field of the magnet 4, and the magnetic field changes through the deformation of the piezoelectric component 3. In practical processes, in order to improve the intensity of the diamagnetic effect, experiments can be conducted to determine the optimal size and placement angle of the heat treatment magnetic field.

[0061] Reference Figures 2-5 To acquire and analyze changes in the magnetic field and provide feedback to the user, the rotating structure also includes a magnetic sensor 5 to detect these changes in real time. The magnetic sensor 5 is located within the frame 1 and within the magnetic field of the magnet 4 to monitor changes in the magnetic field throughout the rotating structure. The magnetic sensor 5 is connected to the circuit board, wires, metal pads, and other structures via an adhesive layer 7 to facilitate timely signal feedback. The adhesive layer 7 can be formed of pressure-sensitive adhesive. A suitable magnetic sensor 5 can be selected based on the actual situation; for example, a Hall effect sensor can be chosen to detect changes in magnetic flux density. Since the magnetic field generated by the permanent magnet is not completely constant, and considering potential external influences and slight disturbances caused by accidental touches, the control system on the motherboard needs to analyze the changes in magnetic flux. The signal of the magnetic flux change is transmitted to the motherboard through the circuit board, wires, metal pads, and other structures, where the control system determines the camshaft rotation status, reducing erroneous feedback.

[0062] Reference Figure 9 When the camshaft 2 rotates, the drive unit 21 compresses the rigid block 32, which in turn compresses the magnetic block 31, causing it to deform. This deformation alters the internal magnetization state of the magnetic block 31 and affects the external magnetic field, resulting in a change in the overall magnetic field state detected by the magnetic sensor 5. Specifically, the magnet 4 first magnetizes the magnetic block 31, but the rigid block 32 does not participate in the magnetization process at this time. When the user performs a rotation operation, the rotation is transmitted to the drive unit 21 via the transmission unit 22 of the camshaft 2. The direction of rotation can be clockwise or counterclockwise, and the speed change is non-linear, making it a continuous rotational motion. The range of motion of the camshaft 2 is not adjustable, and its reciprocating motion is bidirectional.

[0063] Furthermore, referring to Figure 9 The drive unit 21's side surface is tightly attached to the rigid block 32, causing it to press against the magnetic block 31. The surface of the rigid block 32 has undergone wear-resistant and anti-magnetic treatment, so no non-contact force is generated between the camshaft 2 and the rigid block 32; only mechanical stress generated through their contact causes the magnetic block 31 to deform. Based on actual conditions, the material of the camshaft 2 is also selected to be non-magnetized and to avoid generating non-contact forces with the rigid block 32 or other components. Since the cross-sectional shape of the drive unit 21's side surface in the direction perpendicular to the axial direction is determined, the rotation direction and degree of rotation of the camshaft 2 can be inferred from the changes in the magnetic field state detected by the magnetic sensor 5. The drive unit 21's side surface continuously presses against the rigid block 32 at positions with different curvatures, causing the rigid block 32 to move in its height direction and further press against the magnetic block 31 due to the force transmission in the continuous medium, causing it to deform. The deformation of the magnetic block 31 produces a contramagnetic-strictive effect, changing the magnetization state within the magnetic block 31 and affecting the external magnetic field, causing changes in parameters such as the overall magnetic field state and magnetic induction intensity. The magnetic sensor 5 detects changes in the magnetic field state and converts these changes into electrical signals. These signals are then transmitted to the motherboard via a circuit board and / or wires, metal pads, or other structures. The control system within the motherboard then judges the signals and ultimately decides whether to respond to the rotation.

[0064] In some embodiments, refer to Figures 4-6 , Figure 8The rotating structure also includes a piezoelectric component 82 to provide feedback for the pressing operation. When the camshaft 2 is pressed, the camshaft 2 moves and compresses the piezoelectric component 82, causing it to exhibit a positive piezoelectric effect and resulting in a change in charge distribution, forming a special electrical signal. The piezoelectric component 82 is disposed within the frame 1 and is positioned opposite to the axial end of the drive unit 21. The drive unit 21 moves and presses the piezoelectric component 82, causing deformation. During pressing, the entire camshaft 2 moves axially. Therefore, the motion of the camshaft 2 is translational, continuous, and non-linear. The pressing motion is unidirectional, i.e., towards the interior of the frame 1, with the axis of motion along the axis of the camshaft 2, and the range of motion is not adjustable.

[0065] Reference Figure 5 , Figure 8 The piezoelectric component 82 includes a piezoelectric element 821 and a piezoelectric circuit board 822, with the piezoelectric element 821 electrically connected to the piezoelectric circuit board 822. The piezoelectric element 821 is the main component generating the positive piezoelectric effect. Depending on 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, its positive piezoelectric effect is utilized. When a force is applied to the piezoelectric element 821, equal amounts of opposite charges are generated on the two surfaces defined by the piezoelectric element 821, i.e., a potential difference is generated. A suitable circuit can be used to detect whether a signal is generated. Before being used as the piezoelectric element 821, the piezoelectric ceramic needs to be polarized to exhibit piezoelectric properties. Using piezoelectric ceramics as the electrostrictive material is low-cost, simple in structure, less affected by dirt, and sensitive to continuous signal transmission. It can transmit signals even with small displacements, and the torque is not high, resulting in a smooth feel during rotation.

[0066] Reference Figure 5 , Figure 8When the piezoelectric element 821 is compressed and deformed, it generates a voltage. This electrical signal is conducted outward to the main board via the piezoelectric circuit board 822 connected to the piezoelectric element 821, where the main board determines whether the operation is a press or a mis-touch. The piezoelectric circuit board 822 is installed inside the frame 1, and the piezoelectric element 821 is located on the side of the piezoelectric circuit board 822 near the axial end of the drive unit 21. Because it is necessary to capture the voltage or current generated by the piezoelectric element 821 in a timely manner, the piezoelectric circuit board 822 is located inside the frame 1. Depending on the actual situation, a piezoelectric groove 122 can be formed inside the frame 1 to accommodate the piezoelectric circuit board 822, further reducing space occupation. The piezoelectric circuit board 822, located in the piezoelectric groove 122, is welded and fixed to the piezoelectric element 821, and extends outward from the frame 1 to form a metal pad for welding and connecting with external circuit boards or flexible circuit boards to form a conductive circuit. Depending on the actual situation, when piezoelectric ceramic is selected as the piezoelectric element 821, a ceramic circuit board is selected as the piezoelectric circuit board 822, and welding is performed using a reflow soldering process. In some embodiments, the piezoelectric circuit board 822 can also be fixed in the piezoelectric groove 122 by soldering to prevent the piezoelectric circuit board 822 and the piezoelectric element 821 from falling off due to repeated pressing. By soldering the piezoelectric element 821, the piezoelectric circuit board 822 and the metal pads, the circuit is made conductive, and the electrical signal generated by the positive piezoelectric effect can be transmitted to the motherboard more promptly.

[0067] Reference Figures 4-5 , Figure 9 To provide more sensitive feedback to the pressing operation, the end face of the piezoelectric element 821 is shaped as a spherical surface protruding towards the axial end of the drive unit 21, with the piezoelectric element 821 corresponding to the axial end of the drive unit 21. When the drive unit 21 is pressed and moved, the spherical surface of the end face of the piezoelectric element 821 is compressed from the point closest to the drive unit 21, and as the drive unit 21 moves further, more and more of the spherical surface is compressed. Compared to the planar end face of the piezoelectric element 821, the spherical end face of the piezoelectric element 821 can amplify the degree of deformation that occurs when subjected to pressure, thereby enhancing the positive piezoelectric effect. Correspondingly, a pressing block 23 can also protrude from the end of the drive unit 21 near the piezoelectric component 82, and the end face of the pressing block 23 can also be shaped as a spherical surface protruding towards the piezoelectric element 821, further increasing the degree of deformation of the piezoelectric element 821 when compressed.

[0068] In some embodiments, refer to Figures 4-5 , Figures 8-9The rotating structure also includes a second elastic element 81, which is disposed between the piezoelectric component 82 and the drive unit 21, with its edge connected to the frame 1. Depending on the actual situation, a fixing block 121 or similar structure can be installed within the frame 1 to fix the second elastic element 81, preventing it from being driven out of its original position by the camshaft 2 and affecting the operation of the rotating structure. Since the camshaft 2 is movably disposed within the frame 1, its space is prone to accumulating external dirt and debris. The second elastic element 81 can separate the piezoelectric component 82 from the space containing the camshaft 2, preventing dirt from adhering to the surface of the piezoelectric component 821 and affecting its sensitivity. Simultaneously, the second elastic element 81 can also act as a buffer between the pressing block 23 and the piezoelectric component 821, preventing excessive wear on the ends of the piezoelectric component 821 and the pressing block 23.

[0069] Based on the actual situation, refer to Figures 4-5 The second elastic member 81 has a deformable portion 811 protruding towards the pressing block 23, and the deformable portion 811 corresponds to the position of the pressing block 23. The deformable portion 811 can further provide a cushioning effect. When the pressing block 23 moves towards the piezoelectric member 821 due to pressing, it first contacts the deformable portion 811, and then drives the deformable portion 811 to bulge towards the piezoelectric member 821. The part of the second elastic member 81 near the middle is also driven to bulge, until the pressing block 23 squeezes the deformable portion 811 into contact with the piezoelectric member 821 and transmits pressure.

[0070] Since the camshaft 2 needs to be reset after the pressing operation, refer to... Figures 3-5 The rotating structure also includes a first elastic element 93, which provides elastic force for the camshaft 2 to return to its original position. The first elastic element 93 can be a leaf spring, a ring spring, or other elastic component. A first frame 91 is fixed to the external assembly extending outward from the camshaft 2. The first elastic element 93 connects the transmission part 22 to the first frame 91, limiting the transmission part 22 and providing a return force. A through hole 912 is provided on the first frame 91, with the inner diameter of the through hole 912 being the same as the outer diameter of the transmission part 22, to achieve a certain degree of limitation. The transmission part 22 is movably disposed within the through hole 912 and extends to the outside of the through hole 912. Depending on the actual situation, the portion of the transmission part 22 extending to the outside of the through hole 912 can be connected to an external structure such as an adjusting cap to improve the user experience.

[0071] In some embodiments, refer to Figure 3The transmission part 22 has an annular groove 221 on its side surface, allowing the transmission part 22 to be limited by the first elastic member 93 in the axial direction, but unaffected in the circumferential direction. The annular groove 221 is located on the side of the first frame 91 near the drive part 21, preventing it from being exposed to the outside and reducing the influence of the environment on the first elastic member 93 within the annular groove 221. The first elastic member 93 includes an annular portion 931 and two connecting portions 932. The annular portion 931 is rotatably disposed within the annular groove 221 to limit the camshaft 2 in the axial direction. The connecting portions 932 are used to fix the annular portion 931 to the first frame 91, allowing the annular portion 931 to reset the camshaft 2 after a pressing operation. Depending on the actual situation, the annular portion 931 may have a circular, C-shaped, or U-shaped structure. Correspondingly, the first frame 91 is provided with two limiting brackets 911, allowing the two connecting portions 932 to be connected to the two limiting brackets 911 respectively for fixation. Depending on the actual situation, three, four, or one connecting parts 932 can be provided for fixation. During rotation, the annular part 931 slides in the annular groove 221. Since the annular part 931 and the transmission part 22 are not fixed in the circumferential direction, the rotation of the camshaft 2 will not cause the annular part 931 to tighten or loosen.

[0072] Specifically, refer to Figures 3-5 When pressed, the user applies force to the outer end of the camshaft 2, causing the entire camshaft 2 to move axially inward toward the frame 1. The pressing block 23 first contacts the deformable part 811, further deforming the entire second elastic part. The second elastic part resists the movement of the pressing block 23, providing a certain degree of cushioning. Simultaneously, the annular part 931 of the first elastic part is driven in the annular groove 221, moving axially. The connecting part 932 remains fixed within the limiting frame 911 of the first frame 91, meaning the first elastic part is stretched axially. As the camshaft 2 moves further, the pressing block 23 continues to move, causing the deformable part 811 of the second elastic part to contact the protruding end face of the piezoelectric element 821. The protruding end face of the piezoelectric element 821 deforms under pressure, generating charge distribution due to the positive piezoelectric effect, converting mechanical energy into electrical energy and forming an electrical signal. The piezoelectric circuit board 822 receives this electrical signal and transmits it to the main board via external circuitry through metal pads. The main board determines whether the operation was a press or a misclick based on the signal. After a press operation is completed, the external force applied by the user disappears, the first elastic part rebounds, and the annular part 931 drives the camshaft 2 to move outward from the frame 1 through the annular groove 221 to reset it. Considering that users often cannot perform complete rotation and point operations, for example, they may also squeeze while rotating, the signal transmitted to the main board may contain both rotation and press signals. At this time, the control system in the main board will analyze the signal to determine the user's actual operation and feedback requirements.

[0073] In some embodiments, refer to Figure 8 The frame 1 includes a first frame 11 and a second frame 12 arranged opposite to each other to facilitate assembly during the process. Depending on the actual situation and process flow, more components such as a third frame 1 can be added, or it can be integrally formed. The first frame 11 includes a housing 111 and an extension cylinder 112 that are internally connected. The housing 111 is used to accommodate the camshaft 2 and to house the magnetic actuator 3, etc. The extension cylinder 112 provides limiting and support for the camshaft 2 to prevent the camshaft 2 from tilting and causing the rotation process to become uncontrollable. The extension cylinder 112 is located on the side of the housing 111 away from the second frame 12, and part of the transmission part 22 is rotatably disposed inside the extension cylinder 112. Since the extension cylinder 112 contacts the transmission part 22 and provides limiting, it is necessary to control the roughness and surface morphology of the outer surface of the camshaft 2 and the inner surface of the extension cylinder 112 to reduce wear caused by friction.

[0074] Reference Figure 6 , Figure 8 Specifically, in this embodiment, the piezoelectric component 3 and the magnet 4 are disposed within the housing 111, and the piezoelectric component 82 is disposed within the second frame 12. A magnet groove 114 is provided within the housing 111 to accommodate the magnet 4. An adhesive layer 7 can be applied between the magnet 4 and the magnet groove 114 for further fixation. The magnet groove 114 has an opening 116 on the side facing the second frame 12. A positioning part 123 extends from the side of the second frame 12 facing the housing 111. The positioning part 123 extends into the magnet groove 114 and presses against the magnet 4, further fixing the magnet 4 and preventing it from falling off due to reduced adhesiveness of the adhesive layer 7. A fixing block 121 is provided within the second frame 12, at which point the second elastic member 81 connects with the fixing block 121 for fixation. It should be understood that the aforementioned positional configuration is only one possibility; the placement of the piezoelectric component 3 is not limited to within the housing 111, and the placement of the piezoelectric component 82 is not limited to within the second frame 12.

[0075] Reference Figure 6 , Figure 8 A shaft hole 115 is provided on the side where the housing 111 connects to the extension tube 112. The shaft hole 115 connects the extension tube 112 and the housing 111. The drive unit 21 passes through the shaft hole 115. The inner diameter of the shaft hole 115 is smaller than the outer diameter of the transmission unit 22 but larger than the outer diameter of the drive unit 21. Due to the size of the shaft hole 115, an annular baffle is formed between the housing 111 and the extension tube 112. When a pressing operation is performed, the transmission unit 22 is blocked and stops after contacting the surface of the baffle outside the shaft hole 115, thus playing a limiting role and preventing excessive pressing from damaging the second elastic element 81 and the piezoelectric element 821.

[0076] In some embodiments, refer to Figure 3 , Figure 6 , Figure 8The frame 1 also includes a side mounting plate 13 for connecting the first frame 11 and the second frame 12. The outer side of the housing 111 of the first frame 11 has a first mounting groove 117, and the inner side of the second frame 12 has a second mounting groove 124. The first mounting groove 117 and the second mounting groove 124 are positioned correspondingly. The side mounting plate 13 is disposed within the space formed by the first mounting groove 117 and the second mounting groove 124, and connects the housing 111 and the second frame 12. Depending on the actual situation, welding, gluing, or other methods can be used to connect the first frame 11, the second frame 12, and the side mounting plate 13. The number of side mounting plates 13 can be one, two, or more. The first frame 11, the side mounting plate 13, and the second frame 12 can be made of the same or different materials. For example, the first frame 11 can be made of metal, the second frame 12 can be made of plastic, and the side mounting plate 13 can be made of metal. It should be understood that the above material selections are only examples, and the materials of each component are not limited to the above materials.

[0077] In some embodiments, refer to Figure 7 The housing 111 has a through groove 113, which communicates with the shaft hole 115 to form an open structure, facilitating the installation of the camshaft 2 during the process. The extension cylinder 112 has an opening 116 on its side, the size of which in the direction perpendicular to the axial direction 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 partially annular section with a notch, and the central angle corresponding to the annular section is typically greater than half a circle to prevent the camshaft 2 from falling out. Preferably, a partially annular section with a central angle greater than four-thirds can be selected as the cross-sectional shape of the extension cylinder 112 in the direction perpendicular to the axial direction for better positioning of the camshaft 2.

[0078] Based on this, this utility model embodiment also provides an electronic device. The electronic device includes a frame, a control structure, and a rotating structure as described above. The fixed external component extending outward from the camshaft 2 is the first frame 91. The frame includes a first frame 91 and a second frame 92. The rotating structure is installed within 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 connects the first frame 91 and the second frame 92 to form a whole. The first frame 91 has a through hole 912, and the transmission part 22 extends from the through hole 912 to the outside of the first frame 91. Depending on the actual situation, the transmission part 22 extending to the outside of the first frame 91 usually needs to be additionally equipped with an adjusting cap or other structure to form the final knob. The control structure is installed within the second frame 92, separated from the rotating structure, to avoid interference from the magnetic field within the rotating structure and to further reduce the impact of external contaminants on the control structure. Depending on the specific requirements, the control structure typically houses integrated circuit structures such as chips, motherboards, and circuit boards, and is equipped with a control system to analyze and process signals transmitted from the rotating structure. For example, a first circuit board 61 is positioned near the magnetic sensor 5, or the magnetic sensor 5 is adhered to the surface of the first circuit board 61 via adhesive layer 7 and connected to the magnetic sensor 5 via solder pads to promptly acquire changes in the magnetic field detected by the magnetic sensor 5. Alternatively, a second circuit board 62 is positioned near the piezoelectric circuit board 822, or the second circuit board 62 is mounted outside the second housing 111 and connected to the piezoelectric circuit board 822 via solder pads to promptly acquire changes in current or voltage captured by the piezoelectric circuit board 822. The control structure is electrically connected to the rotating structure to facilitate timely signal transmission.

[0079] This application provides a rotating structure and electronic device that uses a magnet to generate a magnetic field. A curved surface with varying curvature is used to compress a piezomagnetic component, causing deformation and further altering the magnetic field state. By reflecting the camshaft rotation state with changes in the magnetic field and using a piezomagnetic component to achieve these changes, the overall structure is simplified, space is reduced, and the magnetic field is less affected by external influences, exhibiting good stability and accuracy.

[0080] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A rotating structure, characterized in that, The rotating structure includes: Framework (1); A camshaft (2) is movably connected to the frame (1). The camshaft (2) includes a drive part (21) and a transmission part (22). The drive part (21) is connected to the transmission part (22). The drive part (21) extends into the interior of the frame (1). The transmission part (22) is located outside the frame (1). The side surface of the drive part (21) is provided with at least one protrusion in a direction perpendicular to the axial direction. The maximum diameter of the drive part (21) is smaller than the diameter of the transmission part (22). A magnetic diaphragm assembly (3) is disposed inside the frame (1). The side surface of the drive unit (21) contacts and presses against the magnetic diaphragm assembly (3), causing the magnetic diaphragm assembly (3) to deform. A magnet (4) is disposed inside the frame (1), and the piezomagnetic component (3) is located within the magnetic field of the magnet (4). The magnetic field changes through the deformation of the piezomagnetic component (3).

2. The rotating structure according to claim 1, characterized in that, The magnetic assembly (3) includes a magnetic block (31) and a rigid block (32). The magnetic block (31) is fixed inside the frame (1), and the rigid block (32) is fixed on the side of the magnetic block (31) facing the drive unit (21).

3. The rotating structure according to claim 1, characterized in that, The rotating structure also includes a magnetic sensor (5) disposed within the frame, the magnetic sensor (5) being located within the magnetic field of the magnet (4).

4. The rotating structure according to claim 1, characterized in that, The frame (1) has a magnet slot (114) inside, and the magnet (4) is disposed in the magnet slot (114).

5. The rotating structure according to claim 1, characterized in that, The rotating structure further includes: A piezoelectric component (82) is disposed within the frame (1). The piezoelectric component (82) is disposed opposite to the axial end of the drive unit (21). The drive unit (21) moves and presses the piezoelectric component (82) to generate deformation.

6. The rotating structure according to claim 5, characterized in that, The piezoelectric assembly (82) includes a piezoelectric element (821) and a piezoelectric circuit board (822). The piezoelectric element (821) is electrically connected to the piezoelectric circuit board (822). The piezoelectric circuit board (822) is installed in the frame (1). The piezoelectric element (821) is located on the side of the piezoelectric circuit board (822) near the axial end of the drive unit (21).

7. The rotating structure according to claim 6, characterized in that, The end face of the piezoelectric element (821) is a spherical surface that protrudes toward the axial end of the drive unit (21), and the piezoelectric element (821) corresponds to the axial end of the drive unit (21).

8. The rotating structure according to claim 5, characterized in that, The rotating structure further includes a second elastic element (81), which is disposed between the piezoelectric assembly (82) and the drive unit (21) and is connected within the frame (1).

9. The rotating structure according to claim 8, characterized in that, The drive unit (21) has a pressing block (23) protruding from one end near the piezoelectric component (82), and the second elastic member (81) has a deformable part (811) protruding toward the pressing block (23), the deformable part (811) corresponding to the position of the pressing block (23).

10. The rotating structure according to claim 1, characterized in that, The rotating structure also includes a first elastic element (93), which connects the transmission part (22) and the first frame (91). The first frame (91) has a through hole (912), the inner diameter of which is the same as the outer diameter of the transmission part (22), and the transmission part (22) is movably disposed in the through hole (912) and extends to the outside of the through hole (912).

11. The rotating structure according to claim 10, characterized in that, The transmission part (22) has an annular groove (221) on its side surface. The annular groove (221) is located on the side of the first frame (91) near the drive part (21). The first elastic member (93) includes an annular part (931) and two connecting parts (932). The annular part (931) is rotatably disposed in the annular groove (221).

12. The rotating structure according to claim 11, characterized in that, The first frame (91) is provided with two limiting frames (911), and the two connecting parts (932) are respectively connected to the two limiting frames (911).

13. The rotating structure according to claim 8, characterized in that, The frame (1) includes a first frame (11) and a second frame (12) arranged opposite to each other. The first frame (11) includes a housing (111) and an extension tube (112) that are internally connected. The extension tube (112) is disposed on the side of the housing (111) away from the second frame (12). Part of the transmission part (22) is rotatably disposed in the extension tube (112). The piezoelectric assembly (3) is disposed in the housing (111). The piezoelectric assembly (82) is disposed in the second frame (12).

14. The rotating structure according to claim 13, characterized in that, The housing (111) has a shaft hole (115) on the side where it connects to the extension tube (112). The shaft hole (115) connects the extension tube (112) and the housing (111). The drive unit (21) passes through the shaft hole (115). The inner diameter of the shaft hole (115) is smaller than the outer diameter of the transmission unit (22) and larger than the outer diameter of the drive unit (21).

15. The rotating structure according to claim 13, characterized in that, The housing (111) has a magnet groove (114) inside, and the magnet groove (114) has an opening on the side facing the second frame (12). The second frame (12) extends to the side facing the housing (111) and is provided with a positioning part (123). The positioning part (123) extends into the magnet groove (114) and is pressed against the magnet (4).

16. The rotating structure according to claim 14, characterized in that, The housing (111) has a through groove (113) which communicates with the shaft hole (115) to form an open structure. The extension cylinder (112) has an opening (116) on its side. The size 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).

17. An electronic device, characterized in that, The electronic device includes: The rack includes a first rack (91) and a second rack (92), the first rack (91) is connected to the second rack (92), and the first rack (91) has a through hole (912); The rotating structure as described in any one of claims 1-16 is installed in the 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 is electrically connected to the rotating structure.

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