Elastic support, linear motor and electronic device

Abstract

The application provides an elastic support, a linear motor and an electronic device, relates to the technical field of electronic devices, and aims to solve the problem that the spring sheet inside the existing linear motor is prone to fatigue fracture. The elastic support provided by the application comprises a bending part, elastic arms and a connecting piece. The first end of the first elastic arm and the first end of the second elastic arm are connected to the two ends of the bending part respectively. The connecting piece is fixed to the second end of the first elastic arm. The connecting piece is provided with a recess on the side wall close to the bending part, and the recess penetrates through the two side surfaces of the connecting piece along the width direction of the connecting piece. The elastic support provided by the application can produce elastic deformation at the position of the recess of the connecting piece on the first elastic arm when the vibrator mechanism in the linear motor vibrates, thereby releasing part of the stress on the first elastic arm, and fatigue fracture of the first elastic arm caused by stress concentration can be avoided.

Description

[0001] This application is a divisional application of the original application with the application number 202311806589.X and the original filing date of December 23, 2023, and the entire contents of the original application are incorporated herein by reference. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the technical field of vibration motors, in particular to an elastic support, a linear motor and an electronic device. BACKGROUND

[0003] With the development of electronic devices (such as mobile phones, tablets, 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 incoming call prompts for mobile phones, vibration feedback for game consoles, etc. Linear motors are gradually being widely used in high-end electronic devices due to their fast reaction speed, high sensitivity and follow-up ability, and smooth movement.

[0004] However, when the linear motor works for a long time, the spring sheet inside the motor is prone to fatigue fracture, which causes the vibrator to be unable to vibrate and the motor to fail. SUMMARY

[0005] Embodiments of the present application provide an elastic support, a linear motor and an electronic device to solve the problem that the spring sheet inside the existing linear motor is prone to fatigue fracture.

[0006] To achieve the above-mentioned purpose, embodiments of the present application adopt the following technical solutions:

[0007] In a first aspect, the present application provides an elastic support, which comprises a bending part, an elastic arm and a connecting piece.

[0008] The first end of the first elastic arm and the first end of the second elastic arm are respectively connected to the two ends of the bending part.

[0009] The connecting piece is fixed to the second end of the first elastic arm. The connecting piece is provided with a recess near the side wall of the bending part, and the recess penetrates through the two side surfaces of the connecting piece along the width direction of the connecting piece.

[0010] The elastic support provided by the first aspect of the present application sets the connecting piece at the second end of the first elastic arm, and sets the recess penetrating through the connecting piece near the side wall of the bending part, so that when the first elastic arm vibrates with the vibrator mechanism in the linear motor, the connecting piece on the first elastic arm can be elastically deformed at the position of the recess, thereby releasing part of the stress on the first elastic arm, and further avoiding fatigue fracture of the first elastic arm caused by stress concentration.

[0011] With reference to the first aspect, in a possible implementation manner, the second end of the first elastic arm is fixedly provided with two connecting pieces, and the two connecting pieces are respectively located on the side of the first elastic arm close to the second elastic arm and the side of the first elastic arm away from the second elastic arm.

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

[0013] With reference to the first aspect, in another possible implementation manner, the second end of the second elastic arm is fixedly provided with a connecting piece. In this way, when the second elastic arm vibrates along with the vibrator mechanism in the linear motor, the connecting piece on the second elastic arm can be elastically deformed, thereby releasing part of the stress on the second elastic arm, and further avoiding fatigue fracture of the second elastic arm due to stress concentration.

[0014] With reference to the first aspect, in another possible implementation manner, the second end of the second elastic arm is fixedly provided with two connecting pieces, and the two connecting pieces are respectively located on the side of the second elastic arm close to the first elastic arm and the side of the second elastic arm away from the first elastic arm.

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

[0016] With reference to the first aspect, in another possible implementation manner, the connecting piece is also provided with a recess on the side wall away from the bending part, and the openings of the two recesses face opposite directions. In this way, no matter whether the elastic support is compressed or stretched, the connecting piece can be elastically deformed in the corresponding direction, thereby releasing part of the stress on the first elastic arm, and further avoiding fracture of the first elastic arm due to stress concentration.

[0017] With reference to the first aspect, in another possible implementation manner, the two recesses are centrally symmetric about the axis of the connecting piece. In this way, the structural stability of the connecting piece can be improved.

[0018] With reference to the first aspect, in a possible implementation manner, the connecting piece comprises a first supporting portion and a second supporting portion, the first supporting portion is fixed to the first elastic arm, and the second supporting portion is fixed to the first supporting portion and is arranged on the side wall of the bending portion close to the first elastic arm.

[0019] With reference to the first aspect, in a possible implementation manner, the connecting piece further comprises an elastic glue, and the elastic glue is filled in the recess.

[0020] In this way, on the one hand, the first supporting portion can ensure that the first elastic arm has sufficient rigidity, thereby maintaining the vibration performance of the linear motor. On the other hand, the elastic deformation of the elastic glue 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, and improving the fatigue resistance of the elastic support and the reliability of the linear motor.

[0021] With reference to the first aspect, in a possible implementation manner, the first elastic arm and / or the second elastic arm is / are provided with a reinforcing block.

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

[0023] With reference to the first aspect, in a possible implementation manner, the reinforcing block is located at a middle position of the first elastic arm or the second elastic arm. Since the stress at the middle position of the elastic arm is low, the reinforcing block is arranged at the middle position of the elastic arm, so as to compensate the rigidity of the elastic arm while not changing the stress distribution of the whole elastic support.

[0024] With reference to the first aspect, in a possible implementation manner, the bending portion is in a U shape.

[0025] The first elastic arm comprises a first portion, a second portion and a third portion connected in sequence, the first portion is connected with the bending portion, and the connecting piece is fixed to the third portion.

[0026] The second elastic arm comprises a sixth portion, a fifth portion and a sixth portion connected in sequence, and the third portion is connected with 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, the elastic support can be arranged in the limited space of the linear motor.

[0029] In a second aspect, the present application provides a linear motor, which comprises a shell and the elastic support provided in the first aspect. The shell has a receiving cavity formed therein, and the elastic support is arranged in the receiving cavity.

[0030] In a possible implementation manner of the second aspect, two elastic supports are arranged, and the two elastic supports are arranged in a central symmetry about a central axis of the shell. In this way, the vibration stability of the linear motor can be maintained.

[0031] It can be understood that the electronic device provided in the second aspect and any possible implementation manner thereof can achieve the beneficial effects as described in the first aspect and any possible implementation manner thereof, which will not be described herein again.

[0032] In a third aspect, the present application provides an electronic device, which comprises a shell, a mainboard and the linear motor provided in the second aspect. The mainboard and the linear motor are arranged in the shell, and the linear motor is electrically connected to the mainboard.

[0033] It can be understood that the electronic device provided in the third aspect and any possible implementation manner thereof can achieve the beneficial effects as described in the first aspect and any possible implementation manner thereof, which will not be described herein again. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 The electronic device provided in the present application is shown in a schematic diagram of the overall structure;

[0035] Figure 2 The electronic device provided in the present application is shown in a schematic diagram of the overall structure; Figure 1 The electronic device provided in the present application is shown in a schematic diagram of the overall structure;

[0036] Figure 3 The electronic device provided in the present application is shown in a schematic diagram of the overall structure;

[0037] Figure 4 The electronic device provided in the present application is shown in a schematic diagram of the overall structure; Figure 3 The electronic device provided in the present application is shown in a schematic diagram of the overall structure;

[0038] Figure 5 The electronic device provided in the present application is shown in a schematic diagram of the overall structure;

[0039] Figure 6 The electronic device provided in the present application is shown in a schematic diagram of the overall structure;

[0040] Figure 7 The electronic device provided in the present application is shown in a schematic diagram of the overall structure; Figure 6 The electronic device provided in the present application is shown in a schematic diagram of the overall structure;

[0041] Figure 8 The electronic device provided in the present application is shown in a schematic diagram of the overall structure;

[0042] Figure 9 for Figure 8 a cross-sectional view of the elastic support in the middle;

[0043] Figure 10 for Figure 8 a schematic view of the setting position of the elastic support in the middle in the linear motor;

[0044] Figure 11 for Figure 8 a schematic view of the deflection of the first elastic arm relative to the connecting piece in the middle;

[0045] Figure 12 for Figure 8 a cross-sectional view of the connecting piece in the middle;

[0046] Figure 13 for Figure 12 a cross-sectional view of M-M in the middle;

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

[0048] Figure 15 fora structural schematic view of another elastic support provided by an embodiment of the present application;

[0049] Figure 16 fora cross-sectional view of the elastic support in the middle; Figure 15

[0050] for a schematic view of the deflection of the first elastic arm relative to the first support part of the connecting piece in the middle; Figure 17 Figure 15 for a structural schematic view of another elastic support provided by an embodiment of the present application;

[0051] Figure 18 for a cross-sectional view of the elastic support in the middle;

[0052] Figure 19 Figure 18 for a structural schematic view of another elastic support provided by an embodiment of the present application;

[0053] Figure 20 for a structural schematic view of another elastic support provided by an embodiment of the present application;

[0054] Figure 21 for a cross-sectional view of the elastic support in the middle; Figure 20

[0055] for a structural schematic view of another elastic support provided by an embodiment of the present application; Figure 22

[0056] for a cross-sectional view of the elastic support in the middle; Figure 23 Figure 22 for a structural schematic view of another elastic support provided by an embodiment of the present application;

[0057] Figure 24 For Figure 5 Stress simulation diagram of the spring sheet and the welding sheet after welding;

[0058] Figure 25 For Figure 22 Stress simulation diagram of the elastic support;

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

[0060] Figure 27 For Figure 26 Sectional view of the elastic support.

[0061] Reference signs:

[0062] 01, electronic device; 10, display module; 11, light-transmitting cover plate; 12, display screen; 20, shell; 21, back cover; 22, frame; 23, middle plate; 30, camera module; 40, mainboard; 50, camera decoration cover; 60, linear motor; 61, shell; 61a, central axis; 610, accommodating cavity; 611, top cover; 612, bottom plate; 62, stator mechanism; 621, coil; 622, circuit board; 63, vibrator mechanism; 631, mass block; 632, permanent magnet; 64, spring sheet; 641, first spring sheet; 642, second spring sheet; 643, welding sheet; 65, elastic support; 65a, first elastic support; 65b, second elastic support; 650, recessed part; 650, recessed part; 650a, first recessed part; 650b, second recessed part; 651, bending 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 support part; 6542, second support 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 conducting sheet; 67, damping piece. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical scheme and advantages of the application more clear, the application is further described in detail below in combination with embodiments. It should be understood that the specific embodiments described herein are only used to explain the application, and are not used to limit the application.

[0064] In the description of the present application, it needs to be clear that the terms "vertical", "transverse", "longitudinal", "front", "back", "left", "right", "up", "down", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application, and do not mean that the device or element referred to must have a particular orientation or position, so it cannot be understood as a limitation on the present application. The "number" cannot be understood as a limitation on the present application.

[0065] In the description of the present application, it needs to be clear that the terms "installation", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0066] The electronic device provided by the embodiment of the present application. 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, the following examples are taken as a mobile phone.

[0067] Please refer to Figure 1 and Figure 2 , as shown in Figure 1 the overall structure schematic diagram of the electronic device 01 provided by the embodiment of the present application, Figure 2 the structure of the above Figure 1 electronic device 01 explosion diagram. From the above, it can be seen that in the embodiment, the electronic device 01 is a mobile phone, and the electronic device 01 can be in the form of a rectangular plate structure. The electronic device 01 can include a display module 10, a shell 20, a camera module 30, a mainboard 40, a camera decoration cover 50, a battery 70 and a linear motor 60.

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

[0069] The display module 10 is used to display images, videos, and the like. The display module 10 can 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 can be a common light-transmitting cover plate, which is used to protect the display screen to avoid damage caused by external force, and can also play a dustproof role. Alternatively, the light-transmitting cover plate 11 can also be a light-transmitting cover plate with touch function, so that the electronic device 01 has touch function, thereby making the user use more convenient. Therefore, the specific material of the light-transmitting cover plate 11 is not specially limited in the present application.

[0070] In addition, the display screen 12 can be a flexible display screen or a rigid display screen. For example, the display screen 12 can 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 shell 20 is used to protect the electronic devices inside the electronic device 01. The shell 20 can include a back cover 21 and a frame 22. The back 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 back cover 21. The frame 22 is fixed to the back cover 21. For example, the frame 22 can be fixed to the back cover 21 by adhesion, threaded connection, welding, clamping, or the like. Alternatively, the frame 22 and the back cover 21 can be integrally formed, i.e., the frame 22 and the back cover 21 form a whole structure. The light-transmitting cover plate 11 can be fixed to the frame 22 by adhesion, so as to form an accommodation cavity inside the electronic device 01. The display screen 12, the main board 40, and the camera module 30 are arranged in the accommodation cavity.

[0072] In some embodiments, the shell 20 can further include a middle plate 23. The middle plate 23 is arranged in the 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 with the frame 22 to form a middle frame of the electronic device 10. For example, the middle plate 23 and the frame 22 can be fixedly connected by adhesion, threaded connection, welding, clamping, or the like. Alternatively, the middle plate 23 and the frame 22 can be integrally formed, i.e., the middle plate 23 and the frame 22 form a whole structure. The middle plate 23 divides the accommodation cavity into two independent spaces. One of the spaces is located between the light-transmitting cover plate 11 and the middle plate 23, and the display screen 12 is arranged in the space. The other space is located between the middle plate 23 and the back cover 21, and the main board 40, the camera module 30, the battery 70, and the linear motor 60 are arranged in the space.

[0073] The main board 40 is used to arrange electronic components of the electronic device 10 and realize electrical connection between the electronic components. The battery 70 is electrically connected with the main board 40 and is used to provide power for the electronic components. For example, the electronic components can include a control chip (e.g., a system on chip, SOC), a graphics processing unit (GPU), a universal flash storage (UFS), a receiver, a flash module, and the linear motor 60.

[0074] The linear motor 60 is used to provide vibration feedback (e.g., incoming call prompt of a mobile phone, vibration feedback of a game console, or the like). The linear motor 60 can be arranged at a position close to the bottom edge of the frame 22, as shown in FIG. 6. Alternatively, the linear motor 60 can be arranged 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 is not limited in the present application. Figure 1 ​

[0075] Please refer to Figure 3 and Figure 4 as shown, Figure 3 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. The linear motor 60 can include a housing 61, a stator mechanism 62, a vibrator mechanism 63, and a spring sheet 64.

[0076] The housing 61 has a center axis 61a, which is also the center axis 61a of the linear motor 60. In the following description of the embodiments of the present application, the center axis 61a of the housing 61 always refers to the center axis 61a of the housing 61 parallel to the Z axis.

[0077] In some embodiments, the housing 61 can include a top cover 611 and a bottom plate 612, and the top cover 611 and the bottom plate 612 are mutually buckled to form the accommodation cavity 610. In this way, the structure of the housing 61 is relatively simple, which is convenient for production and processing and reduces the cost.

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

[0079] The stator mechanism 62 is fixed to the inner wall of the accommodation 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 the electromagnetic force, the vibrator mechanism 63 can reciprocate in a first direction. It should be noted that the first direction can be parallel to the width direction (i.e., the X axis direction) of the electronic device 01. Alternatively, the first direction can also be parallel to the length direction (i.e., the Y axis direction) of the electronic device 01. The following examples are described with the first direction as the X axis direction.

[0080] The stator mechanism 62 can include a coil 621 and a circuit board 622. The circuit board 622 is fixed to 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 to the bottom plate 612 or the circuit board 622. The circuit board 622 can be a FPC board (Flexible Printed Circuit).

[0081] The oscillator mechanism 63 can include a mass block 631 and a permanent magnet 632. The permanent magnet 632 is arranged on the mass block 631. It should be noted that the permanent magnet 632 can 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 conducting sheet 66 is further arranged on the mass block 631. The arrangement positions of the magnetic conducting sheet 66 and the permanent magnet 632 on the mass block 631 are not particularly limited, as long as the dynamic balance of the mass block 631 is not destroyed. For example, the permanent magnet 632 and the magnetic conducting sheet 66 are arranged at the geometric center of the mass block 631, the permanent magnet 632 is embedded in the mass block 631, and the magnetic conducting sheet 66 is located on the side of the permanent magnet 632 away from the coil 621.

[0083] In addition, a damping member 67 is further arranged on the mass block 631, and the damping member 67 is used to provide vibration damping for the oscillator mechanism 63.

[0084] The mass block 631 is provided with spring sheets 64 on both sides. One end of each spring sheet 64 is fixedly connected to the mass block 631, and the other end is fixedly connected to the shell 61. The spring sheets 64 are used to suspend and support the mass block 631 (so that the mass block 631 does not contact the shell 61 or the stator mechanism 62 to avoid friction between them when moving), and the elastic force generated by the spring sheets 64 helps the mass block 631 to return to the initial position, thereby realizing the vibration of the mass block 631.

[0085] When the coil 621 is supplied with alternating current, the coil 621 will be subjected to Ampere force in the magnetic field generated by the permanent magnet 632. However, since the coil 621 is fixed to the shell 61, the Ampere force acting on the coil 621 will act on the permanent magnet 632 in the opposite direction, and the permanent magnet 632 will drive the mass block 631 to move in the first direction. The movement of the mass block 631 will cause the spring sheets 64 to deform, and at this time, the spring sheets 64 will generate an elastic force in the first direction, and the direction of the elastic force is opposite to the direction of the movement of the mass block 631, so as to drive the mass block 631 to return 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 sheets 64, the vibration of the mass block 631 in the first direction is realized.

[0086] In some embodiments, please refer to Figure 5 shown, Figure 5 which is a schematic view of the arrangement position of the spring sheets 64 in the linear motor 60. To improve the vibration strength of the linear motor 60, one spring sheet 64 is arranged on each side of the mass block 631 in the first direction, and the two spring sheets 64 are respectively a first spring sheet 641 and a second spring sheet 642. In addition, the first spring sheet 641 and the second spring sheet 642 are arranged in a central symmetry about the central axis 61a of the shell 61.

[0087] Thus, when the mass block 631 vibrates, the connection point between the mass block 631 and the first spring plate 641 is its force point A, and the connection point between the mass block 631 and the first spring plate 641 is its force point B. The line connecting force point A and force point B ( Figure 5 The dashed line passes through mass block 631 and is parallel to the central axis 61a of the Z-axis. Figure 5 The black dot C in the middle enables the mass block 631 to maintain vibration along the first direction without deviating from the first direction.

[0088] In this field, to ensure durability, the aforementioned housing 61, mass block 631, and spring plate 64 are generally made of metal. Therefore, the mass block 631 and housing 61 are welded and fixed to the spring plate 64, for example, by laser welding, arc welding, argon arc welding, or other welding methods.

[0089] In addition, to facilitate welding and enhance welding strength, welding plates 643 will be added between the spring plate 64 and the housing 61, and between the spring plate 64 and the mass block 631 before welding, or the spring plate 64 will be sandwiched between the welding plate 643 and the mass block 631 before welding.

[0090] However, due to the large vibration amplitude and high vibration frequency (up to 500Hz) of the mass block 631 of the linear motor 60, the deformation amplitude and deformation frequency of the spring plate 64 are also high. During long-term operation, fatigue fracture (fatigue fracture refers to fracture caused by cracks first forming due to local stress concentration and then propagating) is prone to occur at the junction of the spring plate 64 and the weld plate 643, leading to the failure of the linear motor 60.

[0091] To address the aforementioned issues, this application provides an elastic support 65 that can be applied to the linear motor 60, i.e., the elastic support 65 is installed within the accommodating cavity 610.

[0092] In some embodiments, the elastic support 65 is made of metal, which is more durable and easier to weld to the housing 61 and the mass block 631.

[0093] Please see Figure 6 , Figure 7 As shown, Figure 6 This is a structural schematic diagram of an elastic support member 65 provided in an embodiment of this application. Figure 7 for Figure 6 A cross-sectional view of the elastic support member 65 (parallel to the XY plane). It can be seen that the elastic support member 65 may include a bent portion 651, a first elastic arm 652, a second elastic arm 653, and a connecting member 654.

[0094] The first end of the first elastic arm 652 and the first end of the second elastic arm 653 are connected to the two ends of the bending part 651 respectively.

[0095] It should be noted that the bending part 651, the first elastic arm 652 and the second elastic arm 653 can be connected in a C-shaped structure, or in a V-shaped structure, or in a U-shaped structure, which is not specially limited in the present application. Hereinafter, the bending part 651, the first elastic arm 652 and the second elastic arm 653 are taken as an example to be connected in a V-shaped structure.

[0096] For example, please refer to Figure 6 The bending part 651 is in a U-shaped structure. The first elastic arm 652 and the second elastic arm 653 are connected to the two ends of the bending part 651 respectively.

[0097] The first elastic arm 652 comprises 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 comprises 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 arranged in a V-shaped structure with narrow top and wide bottom in the illustrated orientation, which is convenient for arranging in the limited space of the linear motor 60.

[0101] On this basis, the connecting piece 654 is fixed to the end of the third part 652c away from the bending part 651 (i.e. the second end of the first elastic arm 652). The connecting piece 654 is provided with a recess 650 on the side wall close to the bending part 651, and the recess 650 penetrates through the two side surfaces of the connecting piece 654 along the width direction of the connecting piece 654.

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

[0103] In this way, in use, the connecting piece 654 on the first elastic arm 652 is fixedly connected with the shell 61, the second elastic arm 653 is fixedly connected with the vibrator mechanism 63, when the first elastic arm 652 vibrates along with the vibrator mechanism 63 in the linear motor 60, the connecting piece 654 can be elastically deformed at the position of the recess 650, thereby releasing 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] Further, the recess 650 is also arranged on the sidewall of the connecting piece 654 away from the bending part 651, and the openings of the two recesses 650 face opposite directions. The two recesses 650 are centrally symmetrically arranged about the axis of the connecting piece 654.

[0105] For example, please refer to Figure 8 、 Figure 9 as shown. Figure 8 Another structure schematic view of the elastic support 65 provided in the embodiment of the present application, Figure 9 is Figure 8 a sectional view (parallel to the XY plane) of the elastic support 65 in Figure 9 The connecting piece 654 in the foregoing Figure 7 is equivalent to adding a recess 650 on the second sidewall 654f of the connecting piece 654 in the foregoing, 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 sidewall 654e, and the second recess 650b is located on the second sidewall 654f. The first recess 650a and the second recess 650b are centrally symmetrically arranged about the axis (black dot D in the figure) of the connecting piece 654.

[0106] The elastic support 65 described above can be arranged at a position similar to the arrangement position of the spring sheet 64 in use, one elastic support 65 described above is arranged on each side of the mass block 631 along the first direction, and the two elastic supports 65 are centrally symmetrically arranged about the central axis 61a of the shell 61.

[0107] For example, please refer to Figure 10 as shown, Figure 10 isFigure 8 Fig. 6 is a schematic view of the setting position of the elastic support 65 in the linear motor 60. The two elastic supports 65 are respectively a first elastic support 65a and a second elastic support 65b, the first elastic support 65a is located at the left side of the mass 631 in the illustrated orientation, the second elastic support 65b is located at the right side of the mass 631 in the illustrated orientation, and the first elastic support 65a and the second elastic support 65b are centrally symmetric about the central axis 61a of the housing 61.

[0108] The connecting piece 654 in each of the first elastic support 65a and the second elastic support 65b is connected with the housing 61, and the second elastic arm 653 in each of the first elastic support 65a and the second elastic support 65b is connected with the mass 631.

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

[0110] At this time, the connecting piece 654 of the first elastic support 65a will be elastically deformed, the first elastic arm 652 of the first elastic support 65a will be deflected relative to the connecting piece 654 of the first elastic support 65a, so that the opening of the first recess 650a on the connecting piece 654 of the first elastic support 65a is reduced, and the opening of the second recess 650b is enlarged.

[0111] The connecting piece 654 of the second elastic support 65b will also be elastically deformed, the first elastic arm 652 of the second elastic support 65b will be deflected relative to the connecting piece 654 of the second elastic support 65b, so that the opening of the first recess 650a on the connecting piece 654 of the second elastic support 65b is enlarged, and the opening of the second recess 650b is reduced.

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

[0113] In this way, no matter whether the elastic support 65 is compressed or stretched, the connecting piece 654 on the elastic support 65 can be elastically deformed in the corresponding direction, thereby releasing 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.

[0114] In another aspect, the connecting piece 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 are shown in FIGS. 31 4, 31 5 and 31 6, respectively, Figure 11 is a schematic view of the deflection of the first elastic arm 652 relative to the connecting piece 654 in FIG. 31 7, Figure 8 is a sectional view (parallel to the XY plane) of the connecting piece 654 in FIG. 31 8, Figure 12 is a sectional view (parallel to the XY plane) of the connecting piece 654 in FIG. 31 9, Figure 8 is a sectional view (parallel to the XY plane) of the connecting piece 654 in FIG. 32 0. Assuming that the first elastic arm 652 is deflected relative to the connecting piece 654, the resulting moment causes the connecting piece 654 to produce a small angular displacement of angle θ. Since the angular displacement is very small, the connecting piece 654 angular displacement θ is obtained by using the approximation principle: Figure 13 Figure 12

[0116] The deformation of the connecting piece 654 is actually the result of the accumulation of many micro-segment bending deformations. If each micro-segment is equivalent to a rectangular beam with equal cross-section and length dx, the formula for the radius of curvature p of the neutral surface of the connecting piece 654 is:

[0117]

[0118] In the above formula, M(x) is the bending moment on the micro-segment, E is the elastic modulus, and I is the cross-sectional moment of inertia.

[0119] Since the deflection due to bending deformation is much smaller than the full length of the connecting piece 654 along the X-axis direction, the angular displacement θ << 1, so:

[0120]

[0121] Approximating M(x) as constant within the length of the connecting piece 654 (along the X-axis direction), and making a polar coordinate transformation of the above formula, we get:

[0122] dx = rsin(a) da

[0123]

[0124] h = 2r + t - 2rsin(a)

[0125] In the above formula, da is the angular displacement of the micro-segment dx, t is the minimum thickness of the connecting piece 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 piece along the Z-axis direction, and h is the maximum thickness of the connecting piece along the Y-axis direction.

[0126] Substituting the above formula, we get the angular displacement of the connecting piece 654:

[0127]

[0128]

[0129] ​​Therefore, the connector can be approximated as a torsion spring, and the equivalent stiffness is:

[0130]

[0131] Where T is the torsional force.

[0132] According to the above formula, the equivalent stiffness of connector 654 is related to the elastic modulus E, the width b of connector 654 along the Z-axis, the radius r of the recess 650 on connector 654, and the minimum thickness t of connector 654 along the Y-axis. Among these, the minimum thickness t has a significant impact on stiffness, while the radius r of the recess 650 has a relatively small impact. To achieve greater flexibility in connector 654, it is necessary to reduce the minimum thickness t of connector 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 65 remains unchanged, it is necessary to compensate for the decrease in stiffness of the elastic support 65 due to the elastic deformation of the connector 654.

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

[0135] Furthermore, since the stress at the middle position of the first elastic arm 652 or the second elastic arm 653 is low, the reinforcing block 655 is set 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 65.

[0136] For example, see Figure 14 As shown, Figure 14 This is a cross-sectional view (parallel to the XY plane) of another elastic support member 65 provided in an embodiment of this application. Reinforcing blocks 655 are respectively provided at the middle positions of the first elastic arm 652 and the second elastic arm 653. The thickness of the reinforcing blocks 655 along the X-axis is greater than the thickness of the first elastic arm 652 and the second elastic arm 653 along the X-axis.

[0137] In some embodiments, the connector 654 may include a first support portion 6541, a second support portion 6542, and an elastic colloid 6543. The first support portion 6541 is fixed to the first elastic arm 652, and the second support portion 6542 is fixed to the side wall of the first support portion 6541 near the bending portion 651 and is spaced apart from the first elastic arm 652, thereby forming the aforementioned recess 650 between the second support portion 6542 and the first elastic arm 652.

[0138] The elastic glue 6543 is filled in the recess 650. It should be noted that the elastic glue 6543 can be hot melt glue, UV glue, glass glue, etc., which are not specially limited in the present application.

[0139] In this way, on the one hand, the first support part 6541 can ensure that the first elastic arm 652 has sufficient rigidity, thereby maintaining the vibration performance of the linear motor 60. On the other hand, the elastic deformation of the elastic glue 6543 filled between the second support part 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 65 and the reliability of the linear motor 60.

[0140] For example, please refer to Figure 15 and Figure 16 , Figure 15 is another structure schematic diagram of the elastic support 65 provided by the embodiments of the present application, Figure 16 is Figure 15 the cross-sectional view (parallel to the XY plane) of the elastic support 65 in The cross sections (parallel to the XY plane) of the first support part 6541 and the second support part 6542 are both rectangular, and the width of the second support part 6542 along the X-axis direction is smaller than the width of the first support part 6541 along the X-axis direction. The first support part 6541 is fixed on the third part 652c of the first elastic arm 652, and the second support part 6542 is fixed to one side of the first support part 6541 close to the bending part 651, thereby forming a recess 650 between the second support part 6542 and the third part 652c of the first elastic arm 652, and the elastic glue 6543 is filled in the recess 650.

[0141] Figure 17 Please refer to Figure 17 is a schematic diagram of the deflection of the first elastic arm 652 relative to the first support part 6541 of the connecting piece 654 in Figure 15 When the elastic support 65 is compressed to cause the first elastic arm 652 to deflect relative to the first support part 6541, the opening of the recess 650 is reduced, the elastic glue 6543 in the recess 650 is extruded, and part of the stress on the first elastic arm 652 is dispersed to the elastic glue 6543.

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

[0143] For example, please refer to Figure 18 andFigure 19 As shown in FIG. 6, Figure 18 FIG. 6 is a structural schematic diagram of another elastic support 65 provided by an embodiment of the present application, Figure 19 As shown in FIG. 6, Figure 18 FIG. 6 is a sectional view (parallel to the XY plane) of the elastic support 65. Both of the two connecting members 654 are located on the third portion 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. The first connecting member 654a is located on the third portion 652c of the first elastic arm 652 on a side away from the second elastic arm 653. The second connecting member 654b is located on the third portion 652c of the first elastic arm 652 on a side close to the second elastic arm 653. The recess 650 formed between the first connecting member 654a and the third portion 652c, and the recess 650 formed between the second connecting member 654b and the third portion 652c are both filled with the elastic colloid 6543.

[0144] In this way, the third portion 652c of the first elastic arm 652 is equivalent to being clamped between the first connecting member 654a and the second connecting member 654b, which can ensure that the third portion 652c of the first elastic arm 652 has sufficient rigidity 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 portion 652c of the first elastic arm 652.

[0145] Alternatively, please refer to Figure 20 、 Figure 21 As shown in FIG. 6, Figure 20 FIG. 6 is a structural schematic diagram of another elastic support 65 provided by an embodiment of the present application, Figure 21 As shown in FIG. 6, Figure 20 FIG. 6 is a sectional view (parallel to the XY plane) of the elastic support 65. In the figure, the first connecting member 654a is arranged on the third portion 652c of the first elastic arm 652, and the second connecting member 654b is arranged on the sixth portion 653c of the second elastic arm 653. The first connecting member 654a is located on the third portion 652c of the first elastic arm 652 on a side away from the second elastic arm 653. The second connecting member 654b is located on the sixth portion 653c of the second elastic arm 653 on a side close to the first elastic arm 652. The recess 650 formed between the first connecting member 654a and the third portion 652c, and the recess 650 formed between the second connecting member 654b and the sixth portion 653c are both filled with the elastic colloid 6543.

[0146] In some embodiments, three connectors 654 can be arranged on the elastic support 65. Specifically, two of the connectors 654 can be arranged on the third portion 652c of the first elastic arm 652, and the other connector 654 can be arranged on the sixth portion 653c of the second elastic arm 653. Alternatively, two of the connectors 654 can be arranged on the sixth portion 653c of the second elastic arm 653, and the other connector 654 can be arranged on the third portion 652c of the first elastic arm 652.

[0147] For example, as shown in Figure 22 , Figure 23 , Figure 22 is another structural schematic view of the elastic support 65 provided by the embodiments of the present application, Figure 23 is a cross-sectional view (parallel to the XY plane) of the elastic support 65 in Figure 22 . Figure 22 The elastic support 65 in Figure 18 is equivalent to the elastic support 65 in the foregoing , which is additionally provided with a third connector 654c. The third connector 654c is arranged on the sixth portion 653c of the second elastic arm 653 close to the first elastic arm 652, and the recess 650 formed between the third connector 654c and the sixth portion 653c is filled with an elastic colloid 6543.

[0148] Therefore, when the second elastic arm 653 vibrates along with the vibrator mechanism 63 in the linear motor 60, the elastic colloid 6543 filled in the recess 650 formed between the third connector 654c and the sixth portion 653c can be elastically deformed, thereby releasing 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] Figure 24 As shown in Figure 25 , Figure 24 is a stress simulation diagram of the spring sheet 64 and the solder sheet 643 after being soldered in Figure 5 , Figure 25 is a stress simulation diagram of the elastic support 65 in Figure 22 . The simulation background is that the vibrator mechanism 63 of the same specification is in the same working condition. Figure 24 and Figure 25 , the area in the dashed circle is the area with the maximum stress on the spring sheet 64 or the elastic support 65. The lighter the color in this area, the smaller the stress in this area.

[0150] As can be seen from Figure 24 , the color in the dashed circle on the spring sheet 64 is relatively dark, indicating that the stress in this area is relatively large, and from Figure 24It can be seen from the chart on the left side of FIG. 13 that the maximum stress in this region reaches 445 MPa. It can be seen from the chart on the left side of FIG. 14 that the maximum stress in this region is 403 MPa, which is reduced by 42 MPa compared with the spring sheet 64 in the related art, and the reduction reaches 9.61%. Figure 25 It can be seen from the chart on the left side of FIG. 13 that the maximum stress in this region reaches 445 MPa. It can be seen from the chart on the left side of FIG. 14 that the maximum stress in this region is 403 MPa, which is reduced by 42 MPa compared with the spring sheet 64 in the related art, and the reduction reaches 9.61%. Figure 25 It can be seen from the chart on the left side of FIG. 13 that the maximum stress in this region reaches 445 MPa. It can be seen from the chart on the left side of FIG. 14 that the maximum stress in this region is 403 MPa, which is reduced by 42 MPa compared with the spring sheet 64 in the related art, and the reduction reaches 9.61%.

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

[0152] For example, as shown in FIG. 15 and FIG. 16, FIG. 15 is a structure schematic diagram of another elastic support 65 provided by an embodiment of the present application, and FIG. 16 is a sectional view (parallel to the XY plane) of the elastic support 65 in FIG. 15. Figure 26 、 Figure 27 FIG. 17 is a structure schematic diagram of still another elastic support 65 provided by an embodiment of the present application. Figure 26 , Figure 27 FIG. 18 is a sectional view (parallel to the XY plane) of the elastic support 65 in FIG. 17. Figure 26 The elastic support 65 in FIG. 17 is equivalent to adding a third connecting piece 654c and a fourth connecting piece 654d to the elastic support 65 in the foregoing FIG. 16. The third connecting piece 654c and the fourth connecting piece 654d are both arranged on the sixth part 653c of the second elastic arm 653, and the third connecting piece 654c is located on the side of the second elastic arm 653 close to the first elastic arm 652. The fourth connecting piece 654d is located on the side of the second elastic arm 653 away from the first elastic arm 652. The recessed part 650 formed between the third connecting piece 654c and the sixth part 653c and the recessed part 650 formed between the fourth connecting piece 654d and the sixth part 653c are both filled with the elastic colloid 6543. Figure 26 Figure 18 It should be noted that the connecting piece 654 and the first elastic arm 652 or the second elastic arm 653 can be a split structure or be connected as an integral molding structure. When being an integral molding structure, the first elastic arm 652 or the second elastic arm 653 and the connecting piece 654 are an integral whole, and there is no separation layer between them. The integral molding structure is more solid and firm than the split structure, and is also convenient for assembly.

[0153] In the description of this specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

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

[0155] ​The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A linear motor characterized by, The linear motor comprises: a housing, an accommodating cavity is formed inside the housing; a mass, a first elastic arm, a second elastic arm, a first bending part and a first connecting piece are located in the accommodating cavity; wherein 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 first bending part respectively; the first connecting piece is fixed to the second end of the first elastic arm; the first connecting piece is connected with the housing, and the mass is connected with the second elastic arm; the first connecting piece is provided with a first recess on the side wall close to the first bending part, and the first recess penetrates through the two side surfaces of the first connecting piece along the bending axis direction of the first bending part.

2. The linear motor according to claim 1, characterized in that The first elastic arm comprises a first part, a second part and a third part connected in sequence, the first part is connected with one end of the first bending part; one side of the first connecting piece is connected with the third part of the first elastic arm away from the second elastic arm, and the other side of the first connecting piece is also connected with the housing.

3. The linear motor according to claim 2, characterized in that The linear motor further comprises a second connecting piece, the second connecting piece is connected with the third part of the first elastic arm close to the second elastic arm.

4. Linear motor according to any of claims 1-3, characterized in that The first connecting piece comprises a first support part and a second support part, the first support part is connected to the first elastic arm, the second support part is connected to the side wall close to the first bending part of the first support part, and is spaced apart from the first elastic arm to form the first recess between the second support part and the first elastic arm.

5. The linear motor according to claim 4, characterized in that Further comprising a third connecting piece, the second elastic arm comprises a fourth part, a fifth part and a sixth part connected in sequence, the fourth part is connected with the other end of the first bending part, and the third connecting piece is connected with the sixth part of the second elastic arm close to the first elastic arm.

6. The linear motor according to claim 5, characterized by The linear motor further comprises a fourth connecting piece, the fourth connecting piece is connected with the sixth part of the second elastic arm away from the first elastic arm.

7. The linear motor according to claim 6, characterized in that The fourth connecting piece is provided with a second recess on the side wall close to the first bending part, and the second recess penetrates through the two side surfaces of the fourth connecting piece along the bending axis direction of the first bending part.

8. The linear motor according to claim 7, characterized by The first bending part is in U shape.

9. The linear motor according to claim 8, characterized in that Further comprising a third elastic arm and a fourth elastic arm, and the first elastic arm and the second elastic arm are respectively located on both sides of the mass, and are centrally symmetrically arranged about the central axis of the housing.

10. The linear motor of claim 9, wherein, Further comprising a second bending part and a fifth connecting piece, the first end of the third elastic arm and the first end of the fourth elastic arm are connected with the two ends of the second bending part respectively; the fifth connecting piece is fixed to the second end of the third elastic arm; the fifth connecting piece is connected with the housing, and the mass is connected with the fourth elastic arm; the fifth connecting piece is provided with a third recess on the side wall close to the second bending part, and the third recess penetrates through the two side surfaces of the fifth connecting piece along the bending axis direction of the second bending part.

11. The linear motor according to claim 10, characterized by The linear motor further comprises a sixth connecting piece connected to the fourth elastic arm on a side away from the third elastic arm, and a fourth recess is arranged on a side wall of the sixth connecting piece close to the second bending part, and the fourth recess penetrates through both side surfaces of the sixth connecting piece along the bending axis direction of the second bending part.

12. Linear motor according to any of claims 10-11, characterized in that The linear motor further comprises a seventh connecting piece connected to the third elastic arm on a side close to the fourth elastic arm.

13. The linear motor of claim 12, wherein, The linear motor further comprises an eighth connecting piece connected to the fourth elastic arm on a side close to the third elastic arm.

14. The linear motor according to any one of claims 10 to 11, 13, characterized by When the mass moves along the length direction of the first connecting piece towards the first elastic arm and the second elastic arm, the first elastic arm and the second elastic arm are compressed, the first elastic arm is deflected relative to the first connecting piece, the opening of the first recess is reduced, and the opening of the third recess is enlarged.

15. The linear motor of claim 11, wherein, The elastic colloid is filled in the first recess and / or the second recess and / or the third recess and / or the fourth recess.

16. The linear motor according to any one of claims 1 to 3, 5 to 11, 13, 15, characterized by A magnetic conducting sheet and / or a damping piece are arranged on the mass.

17. An electronic device, comprising: The linear motor comprises a shell, a main board and the linear motor of any one of claims 1 to 16, the main board and the linear motor are located in the shell, and the linear motor is electrically connected to the main board.

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