Elastic support member, linear motor and electronic device

Abstract

The invention provides an elastic supporting piece, a linear motor and electronic equipment, relates to the technical field of electronic equipment, and is used for solving the problem that a spring piece in an existing linear motor is prone to fatigue fracture. The elastic supporting piece comprises a bending part, an elastic arm and a connecting piece. The first end of the first elastic arm and the first end of the second elastic arm are connected with the two ends of the bent part respectively. The connecting piece is fixed to the second end of the first elastic arm. The side wall, close to the bent part, of the connecting piece is provided with a concave part, and the concave part penetrates through the two side surfaces of the connecting piece in the width direction of the connecting piece. According to the elastic supporting piece provided by the invention, when the vibrator mechanism in the linear motor vibrates, the connecting piece on the first elastic arm can generate elastic deformation at the position of the sunken part, so that a part of stress on the first elastic arm is released, and fatigue fracture of the first elastic arm caused by stress concentration can be avoided.

Description

[0001] This application is a divisional application. The application number of the original application is 202311806589.X, the original application date is December 23, 2023, and the entire content of the original application is incorporated herein by reference. Technical Field

[0002] The embodiments of this application relate to the technical field of vibration motors, and in particular, to an elastic support member, a linear motor, and an electronic device. Background Art

[0003] With the development of electronic devices (such as mobile phones, tablet computers, smart watches, handheld game consoles, etc.), the user's vibration tactile experience has become an important indicator in electronic devices. In electronic devices, a vibration motor is generally used for system feedback, such as the incoming call reminder of a mobile phone, the vibration feedback of a game console, etc. Linear motors have gradually been widely used in mid- to high-end electronic devices due to their advantages such as fast response speed, high sensitivity and followability, and smooth movement.

[0004] However, when a linear motor operates for a long time, the spring piece inside the motor is prone to fatigue fracture, resulting in the oscillator being unable to vibrate and the motor failing. Summary of the Invention

[0005] The embodiments of this application provide an elastic support member, a linear motor, and an electronic device to solve the problem that the spring piece inside the existing linear motor is prone to fatigue fracture.

[0006] To achieve the above object, the embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, the embodiments of this application provide an elastic support member, which includes a bent portion, elastic arms, and a connecting member.

[0008] Wherein, the first ends of the first elastic arm and the second elastic arm are respectively connected to both ends of the bent portion.

[0009] The connecting member is fixed to the second end of the first elastic arm. A recessed portion is provided on the side wall of the connecting member close to the bent portion, and the recessed portion penetrates through both side surfaces of the connecting member along the width direction of the connecting member.

[0010] For the elastic support member provided in the first aspect of this application, by providing a connecting member at the second end of the first elastic arm and providing a recessed portion penetrating through the connecting member on the side wall of the connecting member close to the bent portion, when the first elastic arm vibrates along with the oscillator mechanism in the linear motor, the connecting member on the first elastic arm can produce elastic deformation at the position of the recessed portion, thereby releasing a part of the stress on the first elastic arm, and further being able to avoid fatigue fracture of the first elastic arm caused by stress concentration.

[0011] In combination with the first aspect, in a possible implementation, two connecting members are fixedly arranged at the second end of the first elastic arm, and the two connecting members are respectively located on one side of the first elastic arm close to the second elastic arm and on the side away from the second elastic arm.

[0012] In this way, the two connecting members can release more stress on the first elastic arm, further reducing the risk of fatigue fracture of the first elastic arm due to stress concentration. And the two connecting members are respectively located on both sides of the first elastic arm, which is equivalent to clamping the second end of the first elastic arm between the two connecting members, and can ensure that the second end of the first elastic arm has sufficient stiffness.

[0013] In combination with the first aspect, in another possible implementation, a connecting member is fixedly arranged at the second end of the second elastic arm. With this arrangement, when the second elastic arm vibrates along with the oscillator mechanism in the linear motor, the connecting member on the second elastic arm can generate elastic deformation, thereby releasing a part of the stress on the second elastic arm, and further avoiding fatigue fracture of the second elastic arm caused by stress concentration.

[0014] In combination with the first aspect, in another possible implementation, two connecting members are fixedly arranged at the second end of the second elastic arm, and the two connecting members are respectively located on one side of the second elastic arm close to the first elastic arm and on the side away from the first elastic arm.

[0015] In this way, the two connecting members on the first elastic arm can release more stress on the second elastic arm, further reducing the risk of fatigue fracture of the second elastic arm due to stress concentration. And the two connecting members are respectively located on both sides of the second elastic arm, which is equivalent to clamping the second end of the second elastic arm between the two connecting members, and can ensure that the second end of the second elastic arm has sufficient stiffness.

[0016] In combination with the first aspect, in another possible implementation, recessed portions are also provided on the side wall of the connecting member away from the bending portion, and the openings of the two recessed portions face in opposite directions. With this arrangement, whether the elastic support member is compressed or stretched, the connecting member can generate elastic deformation in the corresponding direction, thereby releasing a part of the stress on the first elastic arm, and further avoiding fracture of the first elastic arm caused by stress concentration.

[0017] In combination with the first aspect, in another possible implementation, the two recessed portions are arranged centrally symmetrically with respect to the axis of the connecting member. With this arrangement, it is beneficial to improve the structural stability of the connecting member.

[0018] In combination with the first aspect, in another possible implementation, the connecting member includes a first supporting portion and a second supporting portion. The first supporting portion is fixed on the first elastic arm, and the second supporting portion is fixed on the side wall of the first supporting portion close to the bending portion and is arranged at an interval from the first elastic arm, so as to form a recessed portion between the second supporting portion and the first elastic arm.

[0019] In combination with the first aspect, in another possible implementation, the connecting member further includes an elastic colloid, and the elastic colloid is filled in the recessed portion.

[0020] In this way, on the one hand, the first supporting portion can ensure that the first elastic arm has sufficient stiffness, so as to maintain the vibration performance of the linear motor. On the other hand, the elastic deformation of the elastic colloid filled between the second supporting portion and the first elastic arm can be used to disperse the stress on the first elastic arm, thereby reducing the risk of fatigue fracture of the first elastic arm due to stress concentration, improving the anti-fatigue performance of the elastic support member and the reliability of the linear motor.

[0021] In combination with the first aspect, in another possible implementation, a reinforcing block is provided on the first elastic arm and / or the second elastic arm.

[0022] In this way, the stiffness of the first elastic arm or the second elastic arm is compensated by the reinforcing block, so that the equivalent stiffness of the elastic support member remains unchanged, ensuring the vibration performance of the linear motor.

[0023] In combination with the first aspect, in another possible implementation, the reinforcing block is located at the middle position of the first elastic arm or the second elastic arm. Since the stress at the middle position of the elastic arm is relatively low, the reinforcing block is arranged at the middle position of the elastic arm, so as to realize the stiffness compensation of the elastic arm without changing the overall stress distribution of the elastic support member.

[0024] In combination with the first aspect, in another possible implementation, the bending portion is U-shaped;

[0025] The first elastic arm includes a first portion, a second portion and a third portion connected in sequence. The first portion is connected to the bending portion, and the connecting member is fixed on the third portion;

[0026] The second elastic arm includes a fourth portion, a fifth portion and a sixth portion connected in sequence. The fourth portion is connected to the bending portion;

[0027] The first portion and the fourth portion are arranged in parallel, the third portion and the sixth portion are arranged in parallel, and the distance between the first portion and the fourth portion is greater than the distance between the third portion and the sixth portion.

[0028] In this way, it is convenient to arrange the elastic support member in the limited space of the linear motor.

[0029] In a second aspect, the present application provides a linear motor, which includes a housing and the elastic support member provided in the first aspect above. Specifically, an accommodation cavity is formed inside the housing, and the elastic support member is disposed in the accommodation cavity.

[0030] In combination with the second aspect, in a possible implementation manner, there are two elastic support members, and the two elastic support members are centrally symmetrically arranged with respect to the central axis of the housing. With this arrangement, the vibration stability of the linear motor can be maintained.

[0031] It can be understood that for the beneficial effects that the electronic device described in the second aspect and any of its possible implementation manners can achieve, reference can be made to the beneficial effects in the first aspect and any of its possible implementation manners, which will not be elaborated here.

[0032] In a third aspect, the present application provides an electronic device, which includes a housing, a main board, and the linear motor in the second aspect above. Specifically, both the main board and the linear motor are disposed inside the housing, and the linear motor is electrically connected to the main board.

[0033] It can be understood that for the beneficial effects that the electronic device described in the third aspect and any of its possible implementation manners can achieve, reference can be made to the beneficial effects in the first aspect and any of its possible implementation manners, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic diagram of the overall structure of the electronic device provided by an embodiment of the present application;

[0035] Figure 2 is Figure 1 the exploded view of the structure of the electronic device in ;

[0036] Figure 3 is a schematic diagram of the overall structure of a linear motor provided by an embodiment of the present application;

[0037] Figure 4 is Figure 3 the exploded schematic diagram of the structure of the linear motor in ;

[0038] Figure 5 is a schematic diagram of the position where the spring piece is disposed in the linear motor;

[0039] Figure 6 is a schematic diagram of the structure of an elastic support member provided by an embodiment of the present application;

[0040] Figure 7 is Figure 6 the cross-sectional view of the elastic support member in ;

[0041] Figure 8 is a schematic diagram of the structure of another elastic support member provided by an embodiment of the present application;

[0042] Figure 9 is Figure 8 a cross-sectional view of the elastic support member in

[0043] Figure 10 is Figure 8 a schematic diagram of the installation position of the elastic support member in the linear motor in

[0044] Figure 11 is Figure 8 a schematic diagram of the deflection of the first elastic arm relative to the connecting member in

[0045] Figure 12 is Figure 8 a cross-sectional view of the connecting member in

[0046] Figure 13 is Figure 12 a cross-sectional view at M-M in

[0047] Figure 14 is a cross-sectional view of another elastic support member provided by the embodiment of the present application;

[0048] Figure 15 is a schematic structural diagram of another elastic support member provided by the embodiment of the present application;

[0049] Figure 16 is Figure 15 a cross-sectional view of the elastic support member in

[0050] Figure 17 is Figure 15 a schematic diagram of the deflection of the first elastic arm relative to the first support portion of the connecting member in

[0051] Figure 18 is a schematic structural diagram of another elastic support member provided by the embodiment of the present application;

[0052] Figure 19 is Figure 18 a cross-sectional view of the elastic support member in

[0053] Figure 20 is a schematic structural diagram of another elastic support provided by the embodiment of the present application;

[0054] Figure 21 is Figure 20 a cross-sectional view of the elastic support member in

[0055] Figure 22 is a schematic structural diagram of another elastic support member provided by the embodiment of the present application;

[0056] Figure 23 is Figure 22 a cross-sectional view of the elastic support member in

[0057] Figure 24 is Figure 5 the stress simulation diagram after the spring piece and the welding piece are welded in

[0058] Figure 25 is Figure 22 the stress simulation diagram of the elastic support member in

[0059] Figure 26 the structural schematic diagram of another elastic support member provided by the embodiment of the present application;

[0060] Figure 27 is Figure 26 the cross-sectional view of the elastic support member in

[0061] Reference numerals:

[0062] 01, electronic device; 10, display module; 11, light-transmitting cover plate; 12, display screen; 20, housing; 21, rear cover; 22, frame; 23, middle plate; 30, camera module; 40, main board; 50, camera decorative cover; 60, linear motor; 61, housing; 61a, central axis; 610, accommodating cavity; 611, top cover; 612, bottom plate; 62, stator mechanism; 621, coil; 622, circuit board; 63, oscillator mechanism; 631, mass block; 632, permanent magnet; 64, spring piece; 641, first spring piece; 642, second spring piece; 643, welding piece; 65, elastic support member; 65a, first elastic support member; 65b, second elastic support member; 650, recessed part; 650, recessed part; 650a, first recessed part; 650b, second recessed part; 651, bent part; 652, first elastic arm; 652a, first part; 652b, second part; 652c, third part; 653, second elastic arm; 653a, fourth part; 653b, fifth part; 653c, sixth part; 654, connecting piece; 6541, first supporting part; 6542, second supporting part; 6543, elastic colloid; 654a, first connecting piece; 654b, second connecting piece; 654c, third connecting piece; 654d, fourth connecting piece; 654e, first side wall; 654f, second side wall; 654g, third side wall; 654h, fourth side wall; 655, reinforcing block; 66, magnetic conduction sheet; 67, damping member. Detailed implementation manners

[0063] In order to make the purpose, technical solutions and advantages of the application clearer, the following further describes the present application in detail with reference to embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0064] In the description of the present application, it should be clear that the terms "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "horizontal", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, rather than meaning that the indicated device or element must have a specific orientation or position. Therefore, it should not be construed as a limitation to the present application. The "quantity" should also not be construed as a limitation to the present application.

[0065] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. 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.

[0066] The embodiments of the present application provide an electronic device. Specifically, the electronic device can be a portable electronic device or other types of electronic devices. For example, the electronic device can be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a monitor, a camera, a personal computer, a notebook computer, a wearable device, etc. For the convenience of description below, the electronic device is taken as an example of a mobile phone for illustration.

[0067] Please refer to Figure 1 and Figure 2 as shown in Figure 1 which is a schematic diagram of the overall structure of the electronic device 01 provided by the embodiments of the present application, Figure 2 and Figure 1 is an exploded view of the structure of the electronic device 01 in the above. As can be seen from the above, in this embodiment, the electronic device 01 is a mobile phone, and the electronic device 01 can have an approximately rectangular plate-like structure. The electronic device 01 can include a display module 10, a housing 20, a camera module 30, a main board 40, a camera decorative cover 50, a battery 70, and a linear motor 60.

[0068] For the convenience of the following description, an XYZ coordinate system is established, and it is defined that the width direction of the electronic device 01 is the X-axis direction, the length direction of the electronic device 01 is the Y-axis direction, and the thickness direction of the electronic device 01 is the Z-axis direction. Therefore, the present application does not make special limitations on this. It can be understood that, Figure 1 and Figure 2Only some components included in the electronic device 10 are schematically shown, and the actual shape, actual size, actual position, and actual structure of these components are not limited by Figure 1 and Figure 2 . In some other examples, the electronic device 10 may not include the camera decorative cover 50.

[0069] The above display module 10 is used to display images, videos, etc. The display module 10 may include a light-transmitting cover plate 11 and a display screen 12 (English name: panel, also known as a display panel), and the light-transmitting cover plate 11 and the display screen 12 are stacked. The material of the light-transmitting cover plate 11 includes but is not limited to glass. For example, the light-transmitting cover plate 11 may adopt a common light-transmitting cover plate to protect the display screen to avoid damage to the display screen caused by external forces and can play a role in dust prevention. Or, the light-transmitting cover plate 11 may also adopt a light-transmitting cover plate with a touch function to enable the electronic device 01 to have a touch function, thereby making it more convenient for users to use. Therefore, the present application does not make special limitations on the specific material of the light-transmitting cover plate 11.

[0070] In addition, the above display screen 12 may adopt a flexible display screen or a rigid display screen. For example, the display screen 12 may be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a quantum dot light-emitting diode (QLED) display screen, or a liquid crystal display (LCD).

[0071] The above-mentioned housing 20 is used to protect the electronic components inside the electronic device 01. The housing 20 may include a rear cover 21 and a frame 22. The rear cover 21 is located on the side of the display screen 12 away from the light-transmitting cover plate 11 and is stacked with the light-transmitting cover plate 11 and the display screen 12. The frame 22 is located between the light-transmitting cover plate 11 and the rear cover 21. The frame 22 is fixed to the rear cover 21. Exemplarily, the frame 22 can be fixed to the rear cover 21 by means such as bonding, screw connection, welding, snap connection, etc.; alternatively, the frame 22 and the rear cover 21 can also be an integrally formed structure, that is, the frame 22 and the rear cover 21 form a structural member as a whole. The light-transmitting cover plate 11 can be fixed to the frame 22 by gluing, so that the light-transmitting cover plate 11, the rear cover 21 and the frame 22 enclose an accommodation cavity inside the electronic device 01. The above-mentioned display screen 12, main board 40 and camera module 30 are all arranged in this internal accommodation space.

[0072] In some embodiments, the above-mentioned housing 20 may further include a middle plate 23. The middle plate 23 is arranged in the above-mentioned accommodation cavity and is located on the side of the display screen 12 away from the light-transmitting cover plate 11. The middle plate 23 is fixedly connected to the frame 22 to form the middle frame of the electronic device 10. Exemplarily, the middle plate 23 and the frame 22 can be fixedly connected by means such as gluing, screw connection, welding, snap connection, etc.; alternatively, the middle plate 23 and the frame 22 can also be an integrally formed structure, that is, the middle plate 23 and the frame 22 form a structural member as a whole. The middle plate 23 divides the above-mentioned accommodation cavity into two independent spaces. One space is between the light-transmitting cover plate 11 and the middle plate 23, and the display screen 12 is located in this space. The other space is between the middle plate 23 and the rear cover 21, and the above-mentioned main board 40, camera module 30, battery 70 and linear motor 60 are all arranged in this space.

[0073] The above-mentioned main board 40 is used to arrange the electronic components of the electronic device 10 and realize the electrical connection between the electronic components. The battery 70 is electrically connected to the main board 40 and is used to provide electrical energy for each electronic component. Exemplarily, the electronic components can be a control chip (such as a system-on-chip, SOC), a graphics control chip (graphics processing unit, GPU), a universal flash storage (UFS), a receiver, a flash light module, and the above-mentioned linear motor 60, etc.

[0074] The above-mentioned linear motor 60 is used to provide vibration feedback (such as the incoming call reminder of a mobile phone, the vibration feedback of a game console, etc.). The linear motor 60 can be arranged at a position close to the bottom edge of the frame 22 as shown in Figure 1 the figure. Alternatively, the linear motor 60 can be located at a position close to the two side edges of the frame 22 (not shown in the figure). Therefore, the specific position of the linear motor 60 in this application is not specially limited.

[0075] Please refer to Figure 3 and Figure 4 as shown Figure 3 which is a schematic diagram of the overall structure of a linear motor 60 provided by an embodiment of the present application Figure 4 is Figure 3 an exploded view of the structure of the linear motor 60 in. The linear motor 60 may include a housing 61, a stator mechanism 62, a vibrator mechanism 63, and a spring piece 64.

[0076] Among them, a receiving cavity 610 is formed inside the housing 61, and the stator mechanism 62, the vibrator mechanism 63, and the elastic support member 65 are all located in the receiving cavity 610. The housing 61 has a central axis 61a, and this central axis 61a is also the central axis 61a of the linear motor 60. In the description of the following embodiments of the present application, the central axis 61a of the housing 61 always refers to the central axis 61a of the housing 61 parallel to the Z-axis.

[0077] In some embodiments, the housing 61 may include a top cover 611 and a bottom plate 612, and the top cover 611 and the bottom plate 612 are buckled with each other to form the receiving cavity 610. In this way, the structure of the housing 61 is relatively simple, which is convenient for production and processing and reduces costs.

[0078] The material of the housing 61 may be a metal with relatively high structural strength such as aluminum alloy or stainless steel, and the top cover 611 and the bottom plate 612 can be connected by means of bonding, welding, riveting, etc.

[0079] The stator mechanism 62 is fixed on the inner wall of the receiving cavity 610, and the vibrator mechanism 63 is arranged on one side of the stator mechanism 62. An electromagnetic force can be generated between the stator mechanism 62 and the vibrator mechanism 63, and under the action of this electromagnetic force, the vibrator mechanism 63 can vibrate reciprocally in the first direction. It should be noted that the above first direction may be parallel to the width direction (i.e., the X-axis direction) of the electronic device 01. Or, the first direction may also be parallel to the length direction (i.e., the Y-axis direction) of the electronic device 01. The following examples are all described with the first direction being the X-axis direction.

[0080] The stator mechanism 62 may include a coil 621 and a circuit board 622. Among them, the circuit board 622 is fixed on the bottom plate 612, the coil 621 is electrically connected to the circuit board 622, and the interface of the circuit board 622 extends out of the housing 61. It should be noted that the coil 621 can be fixed on the bottom plate 612 or on the circuit board 622. The above circuit board 622 may be an FPC board (Flexible Printed Circuit).

[0081] The oscillator mechanism 63 may include a mass 631 and a permanent magnet 632. Among them, the permanent magnet 632 is disposed on the mass 631. It should be noted that the permanent magnet 632 may be composed of multiple magnetic steels.

[0082] To enhance the magnetic field strength of the permanent magnet 632 and improve the vibration performance of the linear motor 60, a magnetic conductive sheet 66 is also disposed on the mass 631. Regarding the installation positions of the magnetic conductive sheet 66 and the permanent magnet 632 on the mass 631, this application does not make special limitations, as long as the dynamic balance of the mass 631 is not damaged. For example, both the permanent magnet 632 and the magnetic conductive sheet 66 are disposed at the geometric center of the mass 631. The permanent magnet 632 is embedded in the mass 631, and the magnetic conductive sheet 66 is located on the side of the permanent magnet 632 away from the coil 621.

[0083] Moreover, a damping member 67 is also provided on the mass 631, and the damping member 67 is used to provide vibration damping for the oscillator mechanism 63.

[0084] Spring pieces 64 are provided on both sides of the mass 631. One end of the spring piece 64 is fixedly connected to the mass 631, and the other end is fixedly connected to the housing 61. The spring piece 64 is used to suspend and support the mass 631 (so that the mass 631 does not contact the housing 61 or the stator mechanism 62 to avoid friction with the housing 61 or the stator mechanism 62 during movement), and use the elastic force generated by the spring piece 64 to help the mass 631 return to the initial position, thereby realizing the vibration of the mass 631.

[0085] When the above-mentioned coil 621 is energized with alternating current, the coil 621 will be subjected to an Ampere force in the magnetic field generated by the permanent magnet 632. However, since the coil 621 is fixed to the housing 61, the Ampere force received by the coil 621 will act on the permanent magnet 632 in the opposite direction. The permanent magnet 632 will drive the mass 631 to move in the first direction, and the movement of the mass 631 will cause the spring piece 64 to deform. At this time, an elastic force in the first direction will be generated on the spring piece 64, and the direction of this elastic force is opposite to the moving direction of the mass 631 to drive the mass 631 back to the initial position. Under the combined action of the reaction force of the coil 621 on the permanent magnet 632 and the elastic force of the spring piece 64, the vibration of the mass 631 in the first direction is thus realized.

[0086] In some embodiments, please refer to Figure 5 as shown Figure 5 is a schematic diagram of the installation position of the spring piece 64 in the linear motor 60. To improve the vibration intensity of the linear motor 60, a spring piece 64 is provided on each side of the mass 631 along the first direction. The two spring pieces 64 are the first spring piece 641 and the second spring piece 642 respectively. Moreover, the first spring piece 641 and the second spring piece 642 are centrally symmetrically arranged with respect to the central axis 61a of the housing 61.

[0087] In this way, when the mass block 631 vibrates, the connection point of the mass block 631 with the first spring piece 641 is its force application point A, and the connection point of the mass block 631 with the first spring piece 641 is its force application point B. The connection line ( Figure 5 the dotted line in) between the force application point A and the force application point B passes through the central axis 61a parallel to the Z-axis of the mass block 631 ( Figure 5 the black dot C in), so that the mass block 631 can vibrate along the first direction and will not deviate from the first direction.

[0088] In this field, to ensure the durability of use, the above-mentioned housing 61, mass block 631 and spring piece 64 are generally made of metal materials. Therefore, the mass block 631 and the housing 61 are respectively fixed by welding to the spring piece 64. For example, laser welding, arc welding, argon arc welding or other welding methods.

[0089] In addition, to facilitate welding and enhance the welding strength, a welding piece 643 is added between the spring piece 64 and the housing 61 and between the spring piece 64 and the mass block 631 before welding, or the spring piece 64 is sandwiched between the welding piece 643 and the mass block 631 and then welded.

[0090] However, due to the large vibration amount and high vibration frequency (up to 500 Hz at most) of the mass block 631 of the linear motor 60, the deformation amount and deformation frequency of the spring piece 64 are also relatively high. During long-term operation, fatigue fracture is likely to occur at the junction of the spring piece 64 and the welding piece 643 (fatigue fracture refers to the fracture caused by the generation of cracks due to local stress concentration first and then the expansion of the cracks), resulting in the failure of the linear motor 60.

[0091] To solve the above problems, an elastic support 65 is provided in an embodiment of the present application. The elastic support 65 can be applied to the above-mentioned linear motor 60, that is, the elastic support 65 is installed in the above-mentioned accommodation cavity 610.

[0092] In some embodiments, the above-mentioned elastic support 65 is made of metal material, with higher durability and is convenient for welding with the housing 61 and the mass block 631.

[0093] Please refer to Figure 6 、 Figure 7 shown, Figure 6 which is a schematic structural diagram of an elastic support 65 provided by an embodiment of the present application, Figure 7 and Figure 6 is a cross-sectional view (parallel to the XY plane) of the elastic support 65 in. It can be seen that the elastic support 65 can include a bending part 651, a first elastic arm 652, a second elastic arm 653 and a connecting part 654.

[0094] Among them, the first ends of the first elastic arm 652 and the second elastic arm 653 are respectively connected to both ends of the bending part 651.

[0095] It should be noted that the above-mentioned bending part 651, the first elastic arm 652 and the second elastic arm 653 can be distributed and connected in a C-shaped structure, or in a V-shaped structure, or in a U-shaped structure. This application does not make special limitations on this. Hereinafter, an example will be given with the bending part 651, the first elastic arm 652 and the second elastic in a V-shaped structure distribution connection.

[0096] Exemplarily, please refer back to Figure 6 as shown. Among them, the bending part 651 is U-shaped. The first elastic arm 652 and the second elastic arm 653 are respectively connected to both ends of the bending part 651.

[0097] Among them, the first elastic arm 652 includes a first part 652a, a second part 652b and a third part 652c connected in sequence. The first part 652a is connected to one end of the bending part 651, and the connecting piece 654 is fixed on the third part 652c.

[0098] The second elastic arm 653 includes a fourth part 653a, a fifth part 653b and a sixth part 653c connected in sequence. The fourth part 653a is connected to the other end of the bending part 651.

[0099] The first part 652a and the fourth part 653a are arranged in parallel, the third part 652c and the sixth part 653c are arranged in parallel, and the distance between the first part 652a and the fourth part 653a is greater than the distance between the third part 652c and the sixth part 653c.

[0100] In this way, the elastic support 65 can be made into a V-shaped structure with a narrow upper part and a wide lower part in the illustrated orientation, which is convenient for arrangement in the limited space of the linear motor 60.

[0101] On this basis, the above-mentioned connecting piece 654 is fixed to the end of the third part 652c far from the bending part 651 (that is, the second end of the first elastic arm 652). And a recess 650 is provided on the side wall of the connecting piece 654 close to the bending part 651, and the recess 650 penetrates through both side surfaces of the connecting piece 654 along the width direction of the connecting piece 654.

[0102] For example, please refer back to Figure 7As shown. The connecting member 654 has a first side wall 654e and a second side wall 654f parallel to the XZ plane, a third side wall 654g and a fourth side wall 654h parallel to the YZ plane, and a fifth side wall (not shown in the figure) and a sixth side wall (not shown in the figure) parallel to the XY plane. The width direction of the connecting member 654 is the Z-axis direction. The third side wall 654g is connected to the third part 652c of the first elastic arm 652. The recess 650 is provided on the first side wall 654e and penetrates the fifth side wall and the sixth side wall of the connecting member 654 in the Z-axis direction.

[0103] In this way, during use, the connecting member 654 on the first elastic arm 652 is fixedly connected to the housing 61, and the second elastic arm 653 is fixedly connected to the oscillator mechanism 63. When the first elastic arm 652 vibrates along with the oscillator mechanism 63 in the linear motor 60, the connecting member 654 can elastically deform at the position of the recess 650, thereby releasing a part of the stress on the first elastic arm 652, and further avoiding the fracture of the first elastic arm 652 caused by stress concentration.

[0104] Furthermore, recesses 650 are also provided on the side wall of the connecting member 654 away from the bending portion 651, and the openings of the two recesses 650 face in opposite directions. And the two recesses 650 are symmetrically arranged about the axis of the connecting member 654.

[0105] For example, please refer to Figure 8 、 Figure 9 as shown. Figure 8 is a schematic structural diagram of another elastic support member 65 provided by an embodiment of the present application, Figure 9 is Figure 8 a cross-sectional view (parallel to the XY plane) of the elastic support member 65 in Figure 9 The connecting member 654 in Figure 7 is equivalent to adding a recess 650 to the second side wall 654f of the connecting member 654 in the foregoing

[0106] At this time, the two recesses 650 are respectively a first recess 650a and a second recess 650b. The first recess 650a is located on the first side wall 654e, and the second recess 650b is located on the second side wall 654f. The first recess 650a and the second recess 650b are symmetrically arranged about the axis of the connecting member 654 (the black dot D in the figure).

[0107] For example, please refer to Figure 10 as shown, Figure 10 isFigure 8 Schematic diagram of the setting position of the elastic support member 65 in the linear motor 60. The two elastic support members 65 are respectively a first elastic support member 65a and a second elastic support member 65b. The first elastic support member 65a is located on the left side of the mass 631 in the illustrated orientation, and the second elastic support member 65b is located on the right side of the mass 631 in the illustrated orientation. Moreover, the first elastic support member 65a and the second elastic support member 65b are centrosymmetric about the central axis 61a of the housing 61.

[0108] The connecting members 654 in both the first elastic support member 65a and the second elastic support member 65b are connected to the housing 61, and the second elastic arms 653 in both the first elastic support member 65a and the second elastic support member 65b are connected to the mass 631.

[0109] When the mass 631 moves to the left side of the illustrated orientation in the first direction, the first elastic support member 65a is gradually compressed, and the second elastic support member 65b is gradually stretched.

[0110] At this time, the connecting member 654 of the first elastic support member 65a will undergo elastic deformation. The first elastic arm 652 of the first elastic support member 65a will deflect relative to the connecting member 654 of the first elastic support member 65a, causing the opening of the first recess 650a on the connecting member 654 of the first elastic support member 65a to shrink and the opening of the second recess 650b to expand.

[0111] The connecting member 654 of the second elastic support member 65b will also undergo elastic deformation. The first elastic arm 652 of the second elastic support member 65b will deflect relative to the connecting member 654 of the second elastic support member 65b, causing the opening of the first recess 650a on the connecting member 654 of the second elastic support member 65b to expand and the opening of the second recess 650b to shrink.

[0112] When the mass 631 moves to the right side of the illustrated orientation in the first direction, the deformation directions of the connecting member 654 of the first elastic support member 65a and the connecting member 654 of the second elastic support member 65b will be opposite to those when the mass 631 moves to the left side of the illustrated orientation in the first direction.

[0113] In this way, regardless of whether the elastic support member 65 is compressed or stretched, the connecting member 654 on the elastic support member 65 can undergo elastic deformation in the corresponding direction, thereby releasing a part of the stress on the first elastic arm 652, and further being able to avoid the fracture of the first elastic arm 652 caused by stress concentration.

[0114] In other words, the connecting member 654 provided with the two recesses 650 is equivalent to a single-axis symmetric flexible hinge.

[0115] Please refer toFigure 11 , Figure 12 and Figure 13 as shown, Figure 11 is Figure 8 a schematic diagram of the deflection of the first elastic arm 652 relative to the connecting member 654 in Figure 12 is Figure 8 a cross-sectional view (parallel to the XY plane) of the connecting member 654 in Figure 13 is Figure 12 a cross-sectional view at M-M in . Assuming that when the first elastic arm 652 deflects relative to the connecting member 654, the generated moment causes a small angular displacement of θ angle in the connecting member 654. Due to the small angular displacement, the rotation angle θ of the connecting member 654 is obtained by using the approximation principle as:

[0116]

[0117] The deformation of the connecting member 654 is actually the result of the accumulation of the bending deformations of many micro-segments. If each micro-segment is equivalent to a rectangular beam with a constant cross-section and a length of dx, the formula for the radius of curvature ρ of the neutral plane of the connecting member 654 is:

[0118]

[0119] In the above formula, M(x) is the bending moment on the micro-segment, E is the elastic modulus, and I is the moment of inertia of the cross-section.

[0120] Since the deflection caused by the bending deformation is much smaller than the full length of the connecting member 654 along the X-axis direction, the rotation angle θ << 1. Therefore:

[0121]

[0122] Approximately consider M(x) as constant within the length (along the X-axis direction) of the connecting member 654, and perform a polar coordinate transformation on the above formula to get:

[0123] dx = rsin(α)dα

[0124]

[0125] h = 2r + t - 2rsinα

[0126] In the above formula, dα is the rotation angle of the micro-segment dx, t is the minimum thickness of the connecting member 654 along the Y-axis direction (i.e., the distance between the lowest points of the two recesses), b is the width of the connecting member along the Z-axis direction, and h is the maximum thickness of the connecting member along the Y-axis direction.

[0127] Substituting it in, the rotation angle of the connecting member 654 is obtained as:

[0128]

[0129] Therefore, the connecting member can be approximately equivalent to a torsion spring, and the equivalent stiffness is:

[0130]

[0131] where T is the torsional force.

[0132] According to the above formula, it can be seen that the equivalent stiffness of the connecting member 654 is related to the elastic modulus E, the width b of the connecting member 654 in the Z-axis direction, the radius r of the recess 650 on the connecting member 654, and the minimum thickness t of the connecting member 654 in the Y-axis direction. Among them, the minimum thickness t has a significant impact on the stiffness, and the radius r of the recess 650 has a relatively small impact. In order to achieve greater flexibility of the connecting member 654, it is necessary to reduce the minimum thickness t of the connecting member 654 and appropriately increase the radius r of the recess 650.

[0133] In addition, in order to ensure that the total equivalent stiffness of the elastic support member 65 remains unchanged, it is necessary to compensate for the stiffness reduced due to the elastic deformation of the connecting member 654 on the elastic support member 65.

[0134] Therefore, a reinforcing block 655 is provided on the elastic support member 65. It can be understood that the reinforcing block 655 can be provided on the first elastic arm 652, or can be provided on the second elastic arm 653, or the reinforcing block 655 can be provided on both the first elastic arm 652 and the second elastic arm 653 at the same time.

[0135] Furthermore, since the stress at the middle position of the first elastic arm 652 or the second elastic arm 653 is relatively low, the reinforcing block 655 is provided at the middle position of the first elastic arm 652 or the second elastic arm 653, so as to achieve stiffness compensation for the first elastic arm 652 or the second elastic arm 653 without changing the overall stress distribution of the elastic support member 65.

[0136] For example, please refer to Figure 14 as shown Figure 14 This is a cross-sectional view (parallel to the XY plane) of another elastic support member 65 provided by the embodiment of the present application. Reinforcing blocks 655 are respectively provided at the middle positions of the first elastic arm 652 and the second elastic arm 653. And the thickness of the reinforcing block 655 in the X-axis direction is greater than the thickness of the first elastic arm 652 and the second elastic arm 653 in the X-axis direction.

[0137] In some embodiments, the connecting member 654 may include a first support portion 6541, a second support portion 6542, and an elastic colloid 6543. Among them, the first support portion 6541 is fixed on the first elastic arm 652, the second support portion 6542 is fixed on the side wall of the first support portion 6541 close to the bending portion 651, and is spaced apart from the first elastic arm 652, so as to form the above-mentioned recess 650 between the second support portion 6542 and the first elastic arm 652.

[0138] The elastic colloid 6543 is filled in the recess 650. It should be noted that the elastic colloid 6543 can be hot melt adhesive, UV adhesive, glass adhesive, etc., and this application does not make special limitations on this.

[0139] In this way, on the one hand, the first support portion 6541 can ensure that the first elastic arm 652 has sufficient stiffness, so as to maintain the vibration performance of the linear motor 60. On the other hand, the elastic deformation of the elastic colloid 6543 filled between the second support portion 6542 and the first elastic arm 652 can be used to disperse the stress on the first elastic arm 652, thereby reducing the risk of fatigue fracture of the first elastic arm 652 due to stress concentration, and improving the fatigue resistance of the elastic support member 65 and the reliability of the linear motor 60.

[0140] For example, please refer to Figure 15 and Figure 16 as shown in Figure 15 which is a schematic structural diagram of another elastic support member 65 provided by the embodiment of the present application. Figure 16 is Figure 15 a cross-sectional view (parallel to the XY plane) of the elastic support member 65 in . The cross-sections (parallel to the XY plane) of the first support portion 6541 and the second support portion 6542 are both rectangular, and the width of the second support portion 6542 in the X-axis direction is smaller than the width of the first support portion 6541 in the X-axis direction. The first support portion 6541 is fixed on the third portion 652c of the first elastic arm 652, and the second support portion 6542 is fixed on one side of the first support portion 6541 close to the bending portion 651, so as to form a recess 650 between the second support portion 6542 and the third portion 652c of the first elastic arm 652, and the recess 650 is filled with an elastic colloid 6543.

[0141] Please refer to Figure 17 as shown in Figure 17 which is Figure 15 a schematic diagram of the deflection of the first elastic arm 652 relative to the first support portion 6541 of the connecting member 654 in . When the elastic support member 65 is compressed and the first elastic arm 652 deflects relative to the first support portion 6541, the opening of the recess 650 shrinks, the elastic colloid 6543 in the recess 650 is extruded, and a part of the stress on the first elastic arm 652 is dispersed to the elastic colloid 6543.

[0142] In some embodiments, two connecting members 654 can be provided on the elastic support member 65. The two connecting members 654 can be provided on the first elastic arm 652 at the same time, or can be respectively provided on the first elastic arm 652 and the second elastic arm 653.

[0143] For example, please refer to Figure 18 andFigure 19 As shown Figure 18 This is another structural schematic diagram of the elastic support member 65 provided by the embodiment of the present application, Figure 19 which is Figure 18 a cross-sectional view (parallel to the XY plane) of the elastic support member 65 in [[ ]]. Both connecting members 654 are located on the third part 652c of the first elastic arm 652. The two connecting members 654 are respectively a first connecting member 654a and a second connecting member 654b. Among them, the first connecting member 654a is located on one side of the third part 652c of the first elastic arm 652 away from the second elastic arm 653. The second connecting member 654b is located on one side of the third part 652c of the first elastic arm 652 close to the second elastic arm 653. The recessed portions 650 formed between the first connecting member 654a and the third part 652c, and the recessed portions 650 formed between the second connecting member 654b and the third part 652c are both filled with elastic colloid 6543.

[0144] In this way, it is equivalent to clamping the third part 652c of the first elastic arm 652 between the first connecting member 654a and the second connecting member 654b, which can ensure that the third part 652c of the first elastic arm 652 has sufficient stiffness to maintain the vibration performance of the linear motor 60. The elastic deformation of the elastic colloid 6543 can also be used to disperse the stress on the third part 652c of the first elastic arm 652.

[0145] Or, please refer to Figure 20 and Figure 21 as shown Figure 20 This is another structural schematic diagram of the elastic support member 65 provided by the embodiment of the present application, Figure 21 which is Figure 20 a cross-sectional view (parallel to the XY plane) of the elastic support member 65 in [[ ]]. In the figure, the first connecting member 654a is arranged on the third part 652c of the first elastic arm 652, and the second connecting member 654b is arranged on the sixth part 653c of the second elastic arm 653. And the first connecting member 654a is located on one side of the third part 652c of the first elastic arm 652 away from the second elastic arm 653. The second connecting member 654b is located on one side of the sixth part 653c of the second elastic arm 653 close to the first elastic arm 652. The recessed portions 650 formed between the first connecting member 654a and the third part 652c, and the recessed portions 650 formed between the second connecting member 654b and the sixth part 653c are both filled with elastic colloid 6543.

[0146] In some embodiments, three connecting members 654 may be provided on the elastic support member 65. Specifically, two of the connecting members 654 may be provided on the third portion 652c of the first elastic arm 652, and the other connecting member 654 may be provided on the sixth portion 653c of the second elastic arm 653. Alternatively, two of the connecting members 654 may be provided on the sixth portion 653c of the second elastic arm 653, and the other connecting member 654 may be provided on the third portion 652c of the first elastic arm 652.

[0147] For example, please refer to Figure 22 、 Figure 23 as shown, Figure 22 which is a schematic structural diagram of another elastic support member 65 provided by an embodiment of the present application, Figure 23 and Figure 22 is a cross-sectional view (parallel to the XY plane) of the elastic support member 65 in Figure 22 The elastic support member 65 in Figure 18 is equivalent to adding a third connecting member 654c on the basis of the elastic support member 65 in the foregoing

[0148] With this arrangement, when the second elastic arm 653 vibrates along with the oscillator mechanism 63 in the linear motor 60, the elastic colloid 6543 filled in the recess 650 formed between the third connecting member 654c and the sixth portion 653c can produce elastic deformation, thereby releasing a part of the stress on the second elastic arm 653, and further avoiding fatigue fracture of the second elastic arm 653 caused by stress concentration.

[0149] Please refer to Figure 24 and Figure 25 as shown, Figure 24 which is Figure 5 a stress simulation diagram after the spring piece 64 and the welding piece 643 in Figure 25 are welded, Figure 22 and Figure 24 is Figure 25 a stress simulation diagram of the elastic support member 65 in

[0150] The simulation background is that the oscillator mechanisms 63 of the same specification are in the same working conditions. Figure 24 In Figure 24As can be seen from the chart on the left, the maximum stress in this area reaches 445 MPa. And from Figure 25 it can be seen that for the elastic support member 65 provided in the embodiment of the present application, in the area where the stress is the largest on the second elastic arm 653, the color is lighter, indicating that the stress in this area is smaller. From Figure 25 the chart on the left, it can be known that the maximum stress in this area is 403 MPa, which is 42 MPa lower than that of the spring piece 64 in the related art, and the decrease rate reaches 9.61%.

[0151] In some embodiments, four connecting members 654 can also be provided on the elastic support member 65. That is, two connecting members 654 are respectively provided on the first elastic arm 652 and the second elastic arm 653.

[0152] For example, please refer to Figure 26 and Figure 27 as shown. Figure 26 This is a schematic structural diagram of another elastic support member 65 provided in the embodiment of the present application. Figure 27 It is Figure 26 a cross-sectional view (parallel to the XY plane) of the elastic support member 65 in Figure 26 The elastic support member 65 in Figure 18 is equivalent to adding a third connecting member 654c and a fourth connecting member 654d on the basis of the elastic support member 65 in the foregoing

[0153] It should be noted that the above-mentioned connecting member 654 and the first elastic arm 652 or the second elastic arm 653 can be of a split structure or can be connected as an integrally formed structure. When it is an integrally formed structure, the first elastic arm 652 or the second elastic arm 653 and the connecting member 654 are a whole, and there is no separation fault between them. The integrally formed structure is stronger and more solid than the split structure and is also convenient for assembly.

[0154] In the description of this specification, specific features, structures, materials or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0155] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An electronic device, characterized in that, It includes a housing, a main board and a linear motor, and the linear motor includes at least one elastic support member; The elastic support member includes: A bent portion; A first elastic arm and a second elastic arm, the first ends of the first elastic arm and the second elastic arm are respectively connected to both ends of the bent portion; A connecting member fixed to the second end of the first elastic arm or the second elastic arm; a recessed portion is provided on the side wall of the connecting member close to the bent portion, and the recessed portion penetrates through both side surfaces of the connecting member along the bending axis direction of the bent portion.

2. The electronic device according to claim 1, wherein One connecting member is fixedly provided at the second end of the first elastic arm, and the connecting member is located on one side of the first elastic arm close to the second elastic arm or on the side away from the second elastic arm.

3. The electronic device according to claim 1, characterized in that, Two connecting members are fixedly provided at the second end of the first elastic arm, and the two connecting members are respectively located on one side of the first elastic arm close to the second elastic arm and on the side away from the second elastic arm.

4. The electronic device according to claim 1, wherein One connecting member is fixedly provided at the second end of the second elastic arm, and the connecting member is located on one side of the second elastic arm close to the first elastic arm or on the side away from the first elastic arm.

5. The electronic device according to claim 1, characterized in that, Two connecting members are fixedly provided at the second end of the second elastic arm, and the two connecting members are respectively located on one side of the second elastic arm close to the first elastic arm and on the side away from the first elastic arm.

6. The electronic device according to claim 5, characterized in that, The connecting member further includes an elastic colloid, and the elastic colloid is filled in the recessed portion.

7. The electronic device according to claim 1, wherein The bent portion is in a U shape, a V shape or a C shape.

8. An elastic support member, characterized in that, The elastic support member includes: A bent portion; A first elastic arm and a second elastic arm, the first ends of the first elastic arm and the second elastic arm are respectively connected to both ends of the bent portion; A connecting member fixed to the second end of the first elastic arm or the second elastic arm; a recessed portion is provided on the side wall of the connecting member close to the bent portion, and the recessed portion penetrates through both side surfaces of the connecting member along the bending axis direction of the bent portion.

9. The elastic support member according to claim 8, wherein One connecting member is fixedly provided at the second end of the first elastic arm, and the connecting member is located on one side of the first elastic arm close to the second elastic arm or on the side away from the second elastic arm.

10. The elastic support member according to claim 8, characterized in that, Two connecting members are fixedly provided at the second end of the first elastic arm, and the two connecting members are respectively located on one side of the first elastic arm close to the second elastic arm and on the side away from the second elastic arm.

11. The elastic support member according to claim 8, wherein One connecting member is fixedly provided at the second end of the second elastic arm, and the connecting member is located on one side of the second elastic arm close to the first elastic arm or on the side away from the first elastic arm.

12. The elastic support member according to claim 11, wherein, Two connecting members are fixedly provided at the second end of the second elastic arm, and the two connecting members are respectively located on one side of the second elastic arm close to the first elastic arm and on the side away from the first elastic arm.

13. The elastic support member according to any one of claims 8 to 12, characterized in that, The recessed portion is also provided on the side wall of the connecting member away from the bent portion, and the openings of the two recessed portions face in opposite directions.

14. The elastic support member according to claim 13, wherein, The two recessed portions are symmetrically arranged about the axis of the connecting member.

15. The elastic support member according to any one of claims 8 to 12, characterized in that, The connecting member includes a first supporting portion and a second supporting portion. The first supporting portion is fixed on the first elastic arm, and the second supporting portion is fixed on the side wall of the first supporting portion close to the bending portion and is spaced from the first elastic arm to form the concave portion between the second supporting portion and the first elastic arm.

16. The elastic support member according to claim 15, characterized in that, The connecting member further includes an elastic colloid which is filled in the concave portion.

17. The elastic support member according to any one of claims 8 to 12, characterized in that, Reinforcing blocks are provided on the first elastic arm and / or the second elastic arm.

18. The elastic support member according to claim 17, wherein The reinforcing blocks are located at the middle positions of the first elastic arm or the second elastic arm.

19. The elastic support member according to any one of claims 8 to 12, characterized in that, The bending portion is U-shaped; The first elastic arm includes a first portion, a second portion and a third portion which are connected in sequence. The first portion is connected to the bending portion, and the connecting member is fixed on the third portion; The second elastic arm includes a fourth portion, a fifth portion and a sixth portion which are connected in sequence. The fourth portion is connected to the bending portion; The first portion and the fourth portion are arranged in parallel, and the third portion and the sixth portion are arranged in parallel.

20. A linear motor, characterized in that, Comprising: A housing, within which a receiving cavity is formed; A stator mechanism and a vibrator mechanism, both of which are located within the receiving cavity, and the vibrator mechanism is disposed on one side of the stator mechanism; The elastic support member according to any one of claims 8-19, the elastic support member is disposed within the receiving cavity and one of the elastic arms is fixedly connected to the vibrator mechanism, and the other elastic arm is fixedly connected to the inner wall of the housing.

21. An electronic device, characterized in that, Comprising a housing, a main board and the linear motor according to claim 20, both the main board and the linear motor are located within the housing, and the linear motor is electrically connected to the main board.

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