Elastic supports, linear motors and electronics

Abstract

The present application provides an elastic support member, a linear motor and an electronic device, which relates to the technical field of electronic devices, and is used to solve the problem that the spring sheet inside the existing linear motor is prone to fatigue fracture. The elastic support member provided by the present application includes a bending portion, an elastic arm and a connecting member. Among them, 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 portion. 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 bending portion, and the recessed portion passes through the two side surfaces of the connecting member along the width direction of the connecting member. The elastic support member provided by the present application, when the vibrator mechanism in the linear motor vibrates, the connecting member on the first elastic arm can produce elastic deformation at the position of the recessed portion, thereby releasing a portion of the stress on the first elastic arm, and then avoiding fatigue fracture of the first elastic arm due to stress concentration.

Description

Technical Field

[0001] The embodiments of the present 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

[0002] With the development of electronic devices (such as mobile phones, tablets, smart watches, handheld game consoles, etc.), users' vibration tactile experience has become a relatively important indicator in electronic devices. In electronic devices, vibration motors are generally used for system feedback, such as incoming call notifications on mobile phones and vibration feedback on game consoles. Linear motors are gradually being widely used in mid-to-high-end electronic devices due to their advantages such as fast response speed, high sensitivity and responsiveness, and smooth movement.

[0003] However, when a linear motor is operating for a long period of time, the spring sheets inside the motor are prone to fatigue fracture, which can cause the vibrator to be unable to vibrate and the motor to fail. Summary of the invention

[0004] The embodiments of the present application provide an elastic support member, a linear motor and an electronic device, which are used to solve the problem that spring sheets inside existing linear motors are prone to fatigue fracture.

[0005] In order to achieve the above purpose, the embodiment of the present application adopts the following technical solution:

[0006] In a first aspect, an embodiment of the present application provides an elastic support member, which includes a bending portion, an elastic arm and a connecting member.

[0007] 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 portion.

[0008] The connecting piece is fixed to the second end of the first elastic arm. A concave portion is provided on the side wall of the connecting piece close to the bending portion, and the concave portion penetrates through the two side surfaces of the connecting piece along the width direction of the connecting piece.

[0009] The elastic support member provided in the first aspect of the present application is configured by arranging a connecting member at the second end of the first elastic arm, and arranging a recessed portion penetrating the connecting member on the side wall of the connecting member near the bending portion, so that when the first elastic arm vibrates with the vibrator mechanism in the linear motor, the connecting member on the first elastic arm can generate elastic deformation at the position of the recessed portion, thereby releasing a portion of the stress on the first elastic arm, thereby avoiding fatigue fracture of the first elastic arm due to stress concentration.

[0010] In combination with the first aspect, in a possible implementation, two connecting members are fixedly provided on the second end of the first elastic arm, and the two connecting members are respectively located on a side of the first elastic arm close to the second elastic arm and a side away from the second elastic arm.

[0011] 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. 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, which can ensure that the second end of the first elastic arm has sufficient rigidity.

[0012] In combination with the first aspect, in another possible implementation, a connecting piece is fixedly provided at the second end of the second elastic arm. With this arrangement, when the second elastic arm vibrates along with the vibrator mechanism in the linear motor, the connecting piece on the second elastic arm can produce elastic deformation, thereby releasing a portion of the stress on the second elastic arm, thereby preventing the second elastic arm from being fatigued and fractured due to stress concentration.

[0013] In combination with the first aspect, in another possible implementation, two connecting members are fixedly provided on the second end of the second elastic arm, and the two connecting members are respectively located on a side of the second elastic arm close to the first elastic arm and a side away from the first elastic arm.

[0014] 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. 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, which can ensure that the second end of the second elastic arm has sufficient rigidity.

[0015] In combination with the first aspect, in another possible implementation, a 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 opposite directions. In this configuration, no matter the elastic support member is compressed or stretched, the connecting member can produce elastic deformation in the corresponding direction, thereby releasing a portion of the stress on the first elastic arm, thereby avoiding the first elastic arm from being broken due to stress concentration.

[0016] In combination with the first aspect, in another possible implementation, the two recessed portions are centrally symmetrically arranged about the axis of the connecting member, which is conducive to improving the structural stability of the connecting member.

[0017] 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, the second supporting portion is fixed on the side wall of the first supporting portion close to the bending portion, and is spaced apart from the first elastic arm to form a recessed portion between the second supporting portion and the first elastic arm.

[0018] In combination with the first aspect, in another possible implementation manner, the connecting member further includes an elastic colloid, and the elastic colloid is filled in the recessed portion.

[0019] In this way, on the one hand, the first support part 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 colloid filled between the second support part 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, thereby improving the fatigue resistance of the elastic support and the reliability of the linear motor.

[0020] In combination with the first aspect, in another possible implementation manner, a reinforcement block is provided on the first elastic arm and / or the second elastic arm.

[0021] 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, thereby ensuring the vibration performance of the linear motor.

[0022] In combination with the first aspect, in another possible implementation, the reinforcement block is located in the middle of the first elastic arm or the second elastic arm. Since the stress in the middle of the elastic arm is relatively low, the reinforcement block is arranged in the middle of the elastic arm, thereby achieving stiffness compensation for the elastic arm without changing the stress distribution of the elastic support as a whole.

[0023] In combination with the first aspect, in another possible implementation, the bent portion is U-shaped;

[0024] The first elastic arm comprises a first part, a second part and a third part which are connected in sequence, the first part is connected to the bending part, and the connecting member is fixed on the third part;

[0025] The second elastic arm comprises a fourth portion, a fifth portion and a sixth portion which are connected in sequence, and the fourth portion is connected to the bending portion;

[0026] The first part and the fourth part are arranged in parallel, the third part and the sixth part are arranged in parallel, and the distance between the first part and the fourth part is greater than the distance between the third part and the sixth part.

[0027] In this way, it is convenient to arrange the elastic support member in the limited space of the linear motor.

[0028] 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, wherein an accommodating cavity is formed inside the housing, and the elastic support member is disposed in the accommodating cavity.

[0029] In conjunction with the second aspect, in a possible implementation, two elastic support members are provided, and the two elastic support members are centrally symmetrically arranged about the central axis of the housing. This arrangement can maintain the vibration stability of the linear motor.

[0030] It can be understood that the beneficial effects that can be achieved by the electronic device described in the second aspect and any possible implementation thereof provided above can refer to the beneficial effects in the first aspect and any possible implementation thereof, and will not be repeated here.

[0031] In a third aspect, the present application provides an electronic device, which includes a housing, a mainboard, and the linear motor of the second aspect, wherein the mainboard and the linear motor are both disposed in the housing, and the linear motor is electrically connected to the mainboard.

[0032] It can be understood that the beneficial effects that can be achieved by the electronic device described in the third aspect and any possible implementation thereof provided above can refer to the beneficial effects in the first aspect and any possible implementation thereof, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the overall structure of an electronic device provided in an embodiment of the present application;

[0034] Figure 2 for Figure 1 Structural explosion diagram of electronic equipment;

[0035] Figure 3 A schematic diagram of the overall structure of a linear motor provided in an embodiment of the present application;

[0036] Figure 4 for Figure 3 Exploded diagram of the linear motor structure;

[0037] Figure 5 A schematic diagram of the position of the spring sheet in the linear motor;

[0038] Figure 6 A schematic diagram of the structure of an elastic support member provided in an embodiment of the present application;

[0039] Figure 7 for Figure 6 A cross-sectional view of the elastic support member;

[0040] Figure 8 A schematic diagram of the structure of another elastic support member provided in an embodiment of the present application;

[0041] Fig. 9 for Figure 8 A cross-sectional view of the elastic support member;

[0042] Fig.10 for Figure 8 A schematic diagram of the arrangement position of the elastic support member in the linear motor;

[0043] Fig.11 for Figure 8A schematic diagram of the first elastic arm deflecting relative to the connecting member;

[0044] Fig.12 for Figure 8 A cross-sectional view of the connecting piece;

[0045] Fig.13 for Fig.12 Cross-sectional view at the middle MM;

[0046] Fig.14 A cross-sectional view of another elastic support member provided in an embodiment of the present application;

[0047] Fig.15 A schematic diagram of the structure of another elastic support member provided in an embodiment of the present application;

[0048] Fig.16 for Fig.15 A cross-sectional view of the elastic support member;

[0049] Fig.17 for Fig.15 A schematic diagram of the first elastic arm in the figure deflecting relative to the first supporting portion of the connecting member;

[0050] Fig.18 A schematic diagram of the structure of another elastic support member provided in an embodiment of the present application;

[0051] Fig.19 for Fig.18 A cross-sectional view of the elastic support member;

[0052] Fig. 20 A schematic diagram of the structure of another elastic support provided in an embodiment of the present application;

[0053] Fig.21 for Fig. 20 A cross-sectional view of the elastic support member;

[0054] Fig. 22 A schematic diagram of the structure of another elastic support member provided in an embodiment of the present application;

[0055] Fig.23 for Fig. 22 A cross-sectional view of the elastic support member;

[0056] Fig.24 for Figure 5 Stress simulation diagram after welding the middle spring piece and the welding piece;

[0057] Fig.25 for Fig. 22 Stress simulation diagram of the elastic support;

[0058] Fig.26 A schematic diagram of the structure of another elastic support member provided in an embodiment of the present application;

[0059] Fig. 27 for Fig.26 Cross-sectional view of the elastic support member.

[0060] Reference numerals:

[0061] 01. electronic device; 10. display module; 11. light-transmitting cover plate; 12. display screen; 20. housing; 21. back 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. 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 member; 65a. first elastic support member; 65b. second elastic support member; 650. recessed portion; 650. recessed portion; 650a, first recessed portion; 650b, second recessed portion; 651, bending portion; 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 member; 6541, first supporting portion; 6542, second supporting portion; 6543, elastic colloid; 654a, first connecting member; 654b, second connecting member; 654c, third connecting member; 654d, fourth connecting member; 654e, first side wall; 654f, second side wall; 654g, third side wall; 654h, fourth side wall; 655, reinforcing block; 66, magnetic conductive sheet; 67, damping member. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the application more clear, the present application is further described in detail below in conjunction with the 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.

[0063] In the description of the present application, it should be clarified that the terms "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "horizontal" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application, and do not mean that the devices or elements referred to must have a specific direction or position, and therefore cannot be understood as limiting the present application. The "quantity" mentioned above cannot be understood as limiting the present application.

[0064] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0065] The embodiment of the present application provides an electronic device. Specifically, the electronic device may be a portable electronic device or other types of electronic devices. For example, the electronic device may 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 explanation, the following examples are all taken as an example of the electronic device being a mobile phone.

[0066] See also Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the overall structure of the electronic device 01 provided in the embodiment of the present application. Figure 2 For the above Figure 1 Exploded diagram of the structure of the electronic device 01. As can be seen from the above, in this embodiment, the electronic device 01 is a mobile phone, and the electronic device 01 can be in an approximately rectangular plate-shaped structure. The electronic device 01 can include a display module 10, a housing 20, a camera module 30, a mainboard 40, a camera decorative cover 50, a battery 70, and a linear motor 60.

[0067] For the convenience of the following description, an 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, this application does not make any special restrictions on this. It can be understood that Figure 1 and Figure 2 Only some components of the electronic device 10 are schematically shown, and the actual shapes, sizes, positions and structures of these components are not subject to the present invention. Figure 1 and Figure 2 In some other examples, the electronic device 10 may not include the camera decorative cover 50.

[0068] The above-mentioned 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 called 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 adopt an ordinary light-transmitting cover plate to protect the display screen to avoid damage to the display screen due to external force, and it can play a dust-proof role. Alternatively, the light-transmitting cover plate 11 can also adopt a light-transmitting cover plate with a touch function, so that the electronic device 01 has a touch function, which makes it more convenient for users to use. Therefore, the present application does not specifically limit the specific material of the light-transmitting cover plate 11.

[0069] In addition, the display screen 12 may be 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 or 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).

[0070] The housing 20 is used to protect the electronic components inside the electronic device 01. The housing 20 may 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 may be fixed to the back cover 21 by bonding, threading, welding, snapping, etc.; or, the frame 22 may also be an integrally formed structure with the back cover 21, that is, the frame 22 and the back cover 21 form a structural component as a whole. The light-transmitting cover plate 11 may be fixed to the frame 22 by gluing, so that the light-transmitting cover plate 11, the back cover 21 and the frame 22 enclose a receiving cavity inside the electronic device 01, and the display screen 12, the main board 40 and the camera module 30 are all arranged in the internal receiving space.

[0071] In some embodiments, the housing 20 may further include a middle plate 23, which is disposed in the accommodating 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. For example, the middle plate 23 and the frame 22 may be fixedly connected by gluing, threading, welding, snapping, etc.; or, the middle plate 23 and the frame 22 may also be an integrally formed structure, that is, the middle plate 23 and the frame 22 form a structural component as a whole. The middle plate 23 divides the accommodating cavity into two independent spaces, one of which is located between the light-transmitting cover plate 11 and the middle plate 23, and the display screen 12 is located 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 all arranged in the space.

[0072] The mainboard 40 is used to set 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 mainboard 40 and is used to provide power to the electronic components. Exemplarily, the electronic components can be a control chip (such as a system on chip, System on Chip, SOC), a graphics control chip (graphics processing unit, GPU), a universal flash storage (UFS), an earpiece, a flash module, and the above-mentioned linear motor 60, etc.

[0073] The linear motor 60 is used to provide vibration feedback (such as incoming call notification of a mobile phone, vibration feedback of a game console, etc.). The linear motor 60 can be as follows: Figure 1 As shown, the linear motor 60 is disposed near the bottom edge of the frame 22. Alternatively, the linear motor 60 may be located near the edges of both sides of the frame 22 (not shown in the figure). Therefore, the specific position of the linear motor 60 is not particularly limited in the present application.

[0074] See also Figure 3 and Figure 4 As shown, Figure 3 This is a schematic diagram of the overall structure of a linear motor 60 provided in an embodiment of the present application. Figure 4 for Figure 3 The linear motor 60 is an exploded view of the structure. The linear motor 60 may include a housing 61 , a stator mechanism 62 , a vibrator mechanism 63 and a spring sheet 64 .

[0075] The housing 61 has an accommodating cavity 610 formed inside, and the stator mechanism 62, the vibrator mechanism 63 and the elastic support member 65 are all located in the accommodating cavity 610. The housing 61 has a central axis 61a, which is also the central axis 61a of the linear motor 60. In the following embodiments of the present application, the central axis 61a of the housing 61 refers to the central axis 61a of the housing 61 parallel to the Z axis.

[0076] In some embodiments, the housing 61 may include a top cover 611 and a bottom plate 612, which are engaged with each other to form the accommodating cavity 610. In this way, the structure of the housing 61 is relatively simple, which is convenient for production and processing and reduces costs.

[0077] The shell 61 may be made of a metal with high structural strength such as aluminum alloy or stainless steel. The top cover 611 and the bottom plate 612 may be connected by bonding, welding, riveting, or the like.

[0078] The stator mechanism 62 is fixed on the inner wall of the above-mentioned accommodating 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 along the first direction. It should be noted that the above-mentioned first direction can be parallel to the width direction of the electronic device 01 (i.e., the X-axis direction). Alternatively, the first direction can also be parallel to the length direction of the electronic device 01 (i.e., the Y-axis direction). The following examples are all described with the first direction as the X-axis direction.

[0079] The stator mechanism 62 may include a coil 621 and a circuit board 622. 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 may be fixed on the bottom plate 612 or on the circuit board 622. The circuit board 622 may be an FPC (Flexible Printed Circuit).

[0080] The vibrator mechanism 63 may include a mass block 631 and a permanent magnet 632. The permanent magnet 632 is disposed on the mass block 631. It should be noted that the permanent magnet 632 may be composed of a plurality of magnetic steels.

[0081] In order 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 provided on the mass block 631. The present application does not specifically limit the location of the magnetic conductive sheet 66 and the permanent magnet 632 on the mass block 631, provided that the dynamic balance of the mass block 631 is not destroyed. For example, the permanent magnet 632 and the magnetic conductive sheet 66 are both provided at the geometric center of the mass block 631, the permanent magnet 632 is embedded in the mass block 631, and the magnetic conductive sheet 66 is located on the side of the permanent magnet 632 away from the coil 621.

[0082] In addition, a damping member 67 is provided on the mass block 631 , and the damping member 67 is used to provide vibration damping for the vibrator mechanism 63 .

[0083] Spring sheets 64 are provided on both sides of the mass block 631. One end of the spring sheet 64 is fixedly connected to the mass block 631, and the other end is fixedly connected to the housing 61. The spring sheet 64 is used to suspend and support the mass block 631 (so that the mass block 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 the elastic force generated by the spring sheet 64 is used to help the mass block 631 return to the initial position, thereby achieving vibration of the mass block 631.

[0084] When the coil 621 is supplied with alternating current, the coil 621 will be subjected to the Ampere force in the magnetic field generated by the permanent magnet 632. However, since the coil 621 is fixed on the housing 61, the Ampere force on the coil 621 will react on the permanent magnet 632, and the permanent magnet 632 will drive the mass block 631 to move in the first direction, and the movement of the mass block 631 will cause the spring sheet 64 to deform. At this time, an elastic force along the first direction will be generated on the spring sheet 64, and the direction of the elastic force is opposite to the moving direction of the mass block 631, so as to drive the mass block 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 sheet 64, the mass block 631 is vibrated in the first direction.

[0085] In some embodiments, see Figure 5 As shown, Figure 5 The figure is a schematic diagram of the position of the spring sheet 64 in the linear motor 60. In order to improve the vibration strength of the linear motor 60, a spring sheet 64 is provided on both sides of the mass block 631 along the first direction, and the two spring sheets 64 are respectively a first spring sheet 641 and a second spring sheet 642. Moreover, the first spring sheet 641 and the second spring sheet 642 are centrally symmetrically arranged about the central axis 61a of the housing 61.

[0086] Thus, when the mass block 631 vibrates, the connection point between the mass block 631 and the first spring sheet 641 is the force point A, and the connection point between the mass block 631 and the first spring sheet 641 is the force point B. The line connecting the force point A and the force point B ( Figure 5 The dashed line) passes through the central axis 61a of the mass block 631 and is parallel to the Z axis ( Figure 5 The black dot C in the middle) enables the mass block 631 to keep vibrating along the first direction without deviating from the first direction.

[0087] In the art, in order to ensure durability, the housing 61, mass block 631 and spring sheet 64 are generally made of metal. Therefore, the mass block 631 and the housing 61 are respectively welded to the spring sheet 64, for example, by laser welding, arc welding, argon arc welding or other welding methods.

[0088] In addition, to facilitate welding and enhance welding strength, welding pieces 643 are 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 clamped between the welding piece 643 and the mass block 631 before welding.

[0089] However, since the vibration amount of the mass block 631 of the linear motor 60 is large and the vibration frequency is high (up to 500 Hz), the deformation amount and deformation frequency of the spring sheet 64 are also high. During long-term operation, fatigue fracture (fatigue fracture refers to fracture caused by cracks first generated due to local stress concentration and then expanding) is likely to occur at the junction of the spring sheet 64 and the welding sheet 643, resulting in failure of the linear motor 60.

[0090] In order to solve the above problem, an embodiment of the present application provides an elastic support member 65 , which can be applied to the above linear motor 60 , that is, the elastic support member 65 is installed in the above accommodating cavity 610 .

[0091] In some embodiments, the elastic support member 65 is made of metal, which has higher durability and is easy to weld with the shell 61 and the mass block 631 .

[0092] See also Figure 6 , Figure 7 As shown, Figure 6 This is a schematic diagram of the structure of an elastic support member 65 provided in an embodiment of the present application. Figure 7 for Figure 6 65 is 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 bending portion 651, a first elastic arm 652, a second elastic arm 653 and a connecting member 654.

[0093] The first end of the first elastic arm 652 and the first end of the second elastic arm 653 are connected to two ends of the bending portion 651 respectively.

[0094] It should be noted that the above-mentioned bending portion 651, the first elastic arm 652 and the second elastic arm 653 can be connected in a C-shaped structure, a V-shaped structure, or a U-shaped structure, and this application does not specifically limit this. The following is an example of the bending portion 651, the first elastic arm 652 and the second elastic arm being connected in a V-shaped structure.

[0095] For example, please refer to Figure 6 The bending portion 651 is U-shaped. The first elastic arm 652 and the second elastic arm 653 are connected to two ends of the bending portion 651 respectively.

[0096] The first elastic arm 652 includes a first portion 652a, a second portion 652b and a third portion 652c which are connected in sequence. The first portion 652a is connected to one end of the bending portion 651, and the connecting member 654 is fixed on the third portion 652c.

[0097] The second elastic arm 653 includes a fourth portion 653 a , a fifth portion 653 b and a sixth portion 653 c which are connected in sequence. The fourth portion 653 a is connected to the other end of the bent portion 651 .

[0098] The first portion 652a and the fourth portion 653a are arranged in parallel, the third portion 652c and the sixth portion 653c are arranged in parallel, and the distance between the first portion 652a and the fourth portion 653a is greater than the distance between the third portion 652c and the sixth portion 653c.

[0099] In this way, the elastic support member 65 can be made to have a V-shaped structure that is narrow at the top and wide at the bottom in the orientation shown in the figure, which is convenient for arrangement in the limited space of the linear motor 60.

[0100] On this basis, the connecting member 654 is fixed to one end of the third portion 652c away from the bending portion 651 (i.e., the second end of the first elastic arm 652). A recessed portion 650 is provided on the side wall of the connecting member 654 close to the bending portion 651, and the recessed portion 650 penetrates the two side surfaces of the connecting member 654 along the width direction of the connecting member 654.

[0101] For example, refer back to Figure 7The 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 portion 652c of the first elastic arm 652, and the recessed portion 650 is provided on the first side wall 654e, and the recessed portion 650 passes through the fifth side wall and the sixth side wall of the connecting member 654 along the Z-axis direction.

[0102] In this way, when in use, the connecting piece 654 on the first elastic arm 652 is fixedly connected to the shell 61, and the second elastic arm 653 is fixedly connected to 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 produce elastic deformation at the position of the recessed portion 650, thereby releasing part of the stress on the first elastic arm 652, thereby avoiding the breakage of the first elastic arm 652 caused by stress concentration.

[0103] Furthermore, a recessed portion 650 is also provided on the side wall of the connecting member 654 away from the bending portion 651 , and the openings of the two recessed portions 650 face opposite directions. The two recessed portions 650 are centrally symmetrically arranged about the axis of the connecting member 654 .

[0104] For example, see Figure 8 , Fig. 9 shown. Figure 8 This is a schematic diagram of the structure of another elastic support member 65 provided in an embodiment of the present application. Fig. 9 for Figure 8 Cross-sectional view of the elastic support member 65 (parallel to the XY plane). Fig. 9 The connector 654 is equivalent to the connector 654 in the aforementioned Figure 7 A recessed portion 650 is additionally provided on the second side wall 654f of the middle connecting member 654. At this time, the two recessed portions 650 are respectively a first recessed portion 650a and a second recessed portion 650b. The first recessed portion 650a is located on the first side wall 654e, and the second recessed portion 650b is located on the second side wall 654f. The first recessed portion 650a and the second recessed portion 650b are centrally symmetrically arranged about the axis of the connecting member 654 (black dot D in the figure).

[0105] When the elastic support member 65 is in use, the setting position of the spring sheet 64 can be referred to. One elastic support member 65 is respectively provided on both sides of the mass block 631 along the first direction, and the two elastic support members 65 are centrally symmetrically arranged about the central axis 61a of the shell 61.

[0106] For example, see Fig.10 As shown, Fig.10 for Figure 8 Schematic diagram of the arrangement 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 block 631 in the illustrated orientation, and the second elastic support member 65b is located on the right side of the mass block 631 in the illustrated orientation, and the first elastic support member 65a and the second elastic support member 65b are centrally symmetrical about the central axis 61a of the housing 61.

[0107] The connecting members 654 in the first elastic supporting member 65a and the second elastic supporting member 65b are both connected to the housing 61 , and the second elastic arms 653 in the first elastic supporting member 65a and the second elastic supporting member 65b are both connected to the mass block 631 .

[0108] When the mass block 631 moves along the first direction to the left side of the illustrated orientation, the first elastic support member 65 a is gradually compressed, and the second elastic support member 65 b is gradually stretched.

[0109] At this time, the connecting piece 654 of the first elastic support member 65a will produce elastic deformation, and the first elastic arm 652 of the first elastic support member 65a will deflect relative to the connecting piece 654 of the first elastic support member 65a, so that the opening of the first recessed portion 650a on the connecting piece 654 of the first elastic support member 65a will be reduced, and the opening of the second recessed portion 650b will be expanded.

[0110] The connecting piece 654 of the second elastic support member 65b will also produce elastic deformation, and the first elastic arm 652 of the second elastic support member 65b will deflect relative to the connecting piece 654 of the second elastic support member 65b, so that the opening of the first recessed portion 650a on the connecting piece 654 of the second elastic support member 65b is enlarged and the opening of the second recessed portion 650b is reduced.

[0111] When the mass block 631 moves along the first direction to the right side of the illustrated orientation, the deformation direction of the connecting member 654 of the first elastic support member 65a and the deformation direction of the connecting member 654 of the second elastic support member 65b will be opposite to when the mass block 631 moves along the first direction to the left side of the illustrated orientation.

[0112] In this way, no matter the elastic support member 65 is compressed or stretched, the connecting member 654 on the elastic support member 65 can produce elastic deformation in the corresponding direction, thereby releasing part of the stress on the first elastic arm 652, thereby avoiding the breakage of the first elastic arm 652 caused by stress concentration.

[0113] From another perspective, the connecting member 654 having two recessed portions 650 is equivalent to a uniaxially symmetrical flexible hinge.

[0114] See also Fig.11 , Fig.12 and Fig.13 As shown, Fig.11 for Figure 8 Schematic diagram of the first elastic arm 652 deflecting relative to the connecting member 654, Fig.12 for Figure 8 A cross-sectional view of the middle connector 654 (parallel to the XY plane), Fig.13 for Fig.12 Assuming that when the first elastic arm 652 deflects relative to the connecting member 654, the torque generated causes the connecting member 654 to produce a small angular displacement of angle θ. Since the angular displacement is very small, the rotation angle θ of the connecting member 654 is obtained by using the approximate principle as follows:

[0115]

[0116] The deformation of the connector 654 is actually the result of the accumulation of bending deformations of many micro-segments. If each micro-segment is equivalent to a rectangular beam with a length of dx, the formula for the curvature radius ρ of the neutral surface of the connector 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 section moment of inertia.

[0119] Since the deflection caused by the bending deformation is much smaller than the total length of the connecting member 654 along the X-axis direction, the rotation angle θ<<1, therefore:

[0120]

[0121] M(x) is approximately considered to be constant within the length of the connecting member 654 (along the X-axis direction), and the above equation is transformed into polar coordinates as follows:

[0122] dx=rsin(α)dα

[0123]

[0124] h=2r+t-2rsinα

[0125] 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 recessed portions), 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.

[0126] Substituting the rotation angle of the connector 654 into the equation:

[0127]

[0128] Therefore, the connector can be approximately equivalent to a torsion spring, and the equivalent stiffness is:

[0129]

[0130] Where T is the torsional force.

[0131] According to the above formula, the equivalent stiffness of the connector 654 is related to the elastic modulus E, the width b of the connector 654 along the Z axis, the radius r of the recessed portion 650 on the connector 654, and the minimum thickness t of the connector 654 along the Y axis. Among them, the minimum thickness t has a significant effect on the stiffness, and the radius r of the recessed portion 650 has a smaller effect. In order to achieve greater flexibility of the connector 654, it is necessary to reduce the minimum thickness t of the connector 654 and appropriately increase the radius r of the recessed portion 650.

[0132] 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 of the elastic support member 65 that is reduced due to the elastic deformation of the connecting member 654 .

[0133] Therefore, a reinforcing block 655 is provided on the elastic support member 65. It is understandable that the reinforcing block 655 can be provided on the first elastic arm 652, can also be provided on the second elastic arm 653, or can be provided on both the first elastic arm 652 and the second elastic arm 653.

[0134] Furthermore, since the stress in the middle of the first elastic arm 652 or the second elastic arm 653 is lower, the reinforcement block 655 is set in the middle 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.

[0135] For example, see Fig.14 As shown, Fig.14 A cross-sectional view (parallel to the XY plane) of another elastic support member 65 provided in an embodiment of the present application. A reinforcing block 655 is provided at the middle of the first elastic arm 652 and the middle of the second elastic arm 653, respectively. The thickness of the reinforcing block 655 along the X-axis direction is greater than the thickness of the first elastic arm 652 and the second elastic arm 653 along the X-axis direction.

[0136] In some embodiments, the connecting member 654 may include a first supporting portion 6541, a second supporting portion 6542 and an elastic colloid 6543. The first supporting portion 6541 is fixed to the first elastic arm 652, and the second supporting portion 6542 is fixed to the side wall of the first supporting portion 6541 close to the bending portion 651 and is spaced apart from the first elastic arm 652, so that the above-mentioned recessed portion 650 is formed between the second supporting portion 6542 and the first elastic arm 652.

[0137] The elastic colloid 6543 is filled in the recessed portion 650. It should be noted that the elastic colloid 6543 can be hot melt adhesive, UV adhesive, glass adhesive, etc., and the present application does not make any special limitation on this.

[0138] In this way, on the one hand, the first support part 6541 can ensure that the first elastic arm 652 has sufficient rigidity, 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 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 member 65 and the reliability of the linear motor 60.

[0139] For example, see Fig.15 and Fig.16 As shown, Fig.15 This is a schematic diagram of the structure of another elastic support member 65 provided in an embodiment of the present application. Fig.16 for Fig.15 The cross-section of the elastic support member 65 (parallel to the XY plane) is a rectangular shape in cross-section (parallel to the XY plane) of the first support portion 6541 and the second support portion 6542. The width of the second support portion 6542 along the X-axis direction is smaller than the width of the first support portion 6541 along the X-axis direction. The first support portion 6541 is fixed to the third portion 652c of the first elastic arm 652, and the second support portion 6542 is fixed to the side of the first support portion 6541 close to the bending portion 651, so that a recessed portion 650 is formed between the second support portion 6542 and the third portion 652c of the first elastic arm 652, and the recessed portion 650 is filled with an elastic colloid 6543.

[0140] See also Fig.17 As shown, Fig.17 for Fig.15 Schematic diagram of the first elastic arm 652 deflecting relative to the first support portion 6541 of the connecting member 654. 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 recessed portion 650 is reduced, the elastic colloid 6543 in the recessed portion 650 is squeezed, and part of the stress on the first elastic arm 652 is dispersed to the elastic colloid 6543.

[0141] In some embodiments, two connecting members 654 may be provided on the elastic support member 65. The two connecting members 654 may be provided on the first elastic arm 652 at the same time, or may be provided on the first elastic arm 652 and the second elastic arm 653 respectively.

[0142] For example, see Fig.18 and Fig.19 As shown, Fig.18 This is a schematic diagram of the structure of another elastic support member 65 provided in an embodiment of the present application. Fig.19 for Fig.18 65 is a cross-sectional view of the elastic support member 65 in FIG. 6 (parallel to the XY plane). Both 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. Among them, the first connecting member 654a is located on the side of the third portion 652c of the first elastic arm 652 away from the second elastic arm 653. The second connecting member 654b is located on the side of the third portion 652c of the first elastic arm 652 close to the second elastic arm 653. The recessed portion 650 formed between the first connecting member 654a and the third portion 652c, and the recessed portion 650 formed between the second connecting member 654b and the third portion 652c are filled with elastic colloid 6543.

[0143] In this way, the third portion 652c of the first elastic arm 652 is sandwiched between the first connecting member 654a and the second connecting member 654b, so 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.

[0144] Alternatively, see Fig. 20 , Fig.21 As shown, Fig. 20 This is a schematic diagram of the structure of another elastic support member 65 provided in an embodiment of the present application. Fig.21 for Fig. 20 65 is a cross-sectional view of the elastic support member 65 (parallel to the XY plane). 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 side of the third portion 652c of the first elastic arm 652 away from the second elastic arm 653. The second connecting member 654b is located on the side of the sixth portion 653c of the second elastic arm 653 close to the first elastic arm 652. The recessed portion 650 formed between the first connecting member 654a and the third portion 652c, and the recessed portion 650 formed between the second connecting member 654b and the sixth portion 653c are both filled with elastic colloid 6543.

[0145] 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 another 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 another connecting member 654 may be provided on the third portion 652c of the first elastic arm 652.

[0146] For example, see Fig. 22 , Fig.23 As shown, Fig. 22 This is a schematic diagram of the structure of another elastic support member 65 provided in an embodiment of the present application. Fig.23 for Fig. 22 Cross-sectional view of the elastic support member 65 (parallel to the XY plane). Fig. 22 The elastic support member 65 is equivalent to the elastic support member 65 in the aforementioned Fig.18 A third connecting member 654c is added on the basis of the middle elastic support member 65. The third connecting member 654c is arranged on the sixth portion 653c of the second elastic arm 653 near the first elastic arm 652, and the recessed portion 650 formed between the third connecting member 654c and the sixth portion 653c is filled with elastic colloid 6543.

[0147] With this arrangement, 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 connecting member 654c and the sixth part 653c can produce elastic deformation, thereby releasing a portion of the stress on the second elastic arm 653, thereby avoiding fatigue fracture of the second elastic arm 653 due to stress concentration.

[0148] See also Fig.24 and Fig.25 As shown, Fig.24 for Figure 5 The stress simulation diagram after the spring piece 64 and the welding piece 643 are welded, Fig.25 for Fig. 22 Stress simulation diagram of the elastic support member 65. The simulation background is that the vibrator mechanism 63 of the same specification is under the same working condition. Fig.24 and Fig.25 In the figure, the area within the dotted circle is the area with the greatest stress on the spring sheet 64 or the elastic support member 65. The lighter the color in the area, the smaller the stress in the area.

[0149] from Fig.24 As can be seen from the figure, the color in the dotted circle on the spring sheet 64 is darker, indicating that the stress in this area is greater. Fig.24From the left graph, we can see that the maximum stress in this area reaches 445MPa. Fig.25 It can be seen from the figure that the elastic support member 65 provided in the embodiment of the present application has a lighter color in the area with the greatest stress on the second elastic arm 653, indicating that the stress in this area is relatively small. Fig.25 As can be seen from the chart on the middle left, the maximum stress in this area is 403 MPa, which is 42 MPa lower than that of the spring leaf 64 of the related art, and the reduction rate reaches 9.61%.

[0150] In some embodiments, four connecting members 654 may be further provided on the elastic support member 65. That is, two connecting members 654 are provided on the first elastic arm 652 and the second elastic arm 653 respectively.

[0151] For example, see Fig.26 , Fig. 27 As shown, Fig.26 This is a schematic diagram of the structure of another elastic support member 65 provided in an embodiment of the present application. Fig. 27 for Fig.26 Cross-sectional view of the elastic support member 65 (parallel to the XY plane). Fig.26 The elastic support member 65 is equivalent to the elastic support member 65 in the aforementioned Fig.18 A third connecting member 654c and a fourth connecting member 654d are additionally provided on the basis of the middle elastic support member 65. The third connecting member 654c and the fourth connecting member 654d are both provided on the sixth portion 653c of the second elastic arm 653, and the third connecting member 654c is located on the side of the second elastic arm 653 close to the first elastic arm 652. The fourth connecting member 654d is located on the side of the second elastic arm 653 away from the first elastic arm 652. The recessed portion 650 formed between the third connecting member 654c and the sixth portion 653c, and the recessed portion 650 formed between the fourth connecting member 654d and the sixth portion 653c are both filled with elastic colloid 6543.

[0152] 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 a split structure, or they can be connected to form an integral structure. When it is an integral 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 the two. Compared with the split structure, the integral structure is stronger and more secure, and is also easier to assemble.

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

[0154] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An elastic support member for use in a linear motor, characterized in that: The elastic support member comprises: Bending part; a first elastic arm and a second elastic arm, wherein a first end of the first elastic arm and a first end of the second elastic arm are respectively connected to two ends of the bending portion; A 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 bending portion, and the recessed portion penetrates through the two side surfaces of the connecting member along the bending axis direction of the bending portion.

2. The elastic support member according to claim 1, characterized in that: The second end of the first elastic arm is fixedly provided with two connecting members, and the two connecting members are respectively located on a side of the first elastic arm close to the second elastic arm and a side away from the second elastic arm.

3. The elastic support member according to claim 1, characterized in that: The connecting piece is fixedly disposed on the second end of the second elastic arm.

4. The elastic support member according to claim 3, characterized in that: The second end of the second elastic arm is fixedly provided with two connecting members, and the two connecting members are respectively located on a side of the second elastic arm close to the first elastic arm and a side away from the first elastic arm.

5. The elastic support member according to any one of claims 1 to 4, characterized in that: The recessed portion is also provided on the side wall of the connecting member away from the bending portion, and the openings of the two recessed portions face opposite directions.

6. The elastic support member according to claim 5, characterized in that: The two recessed portions are centrally symmetrically arranged about the axis of the connecting member.

7. The elastic support member according to any one of claims 1 to 4, 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, the second supporting portion is fixed on the side wall of the first supporting portion close to the bending portion, and is spaced apart from the first elastic arm to form the recessed portion between the second supporting portion and the first elastic arm.

8. The elastic support member according to claim 7, characterized in that: The connecting member further comprises an elastic colloid, and the elastic colloid is filled in the recessed portion.

9. The elastic support member according to any one of claims 1 to 4, characterized in that: A reinforcement block is provided on the first elastic arm and / or the second elastic arm.

10. The elastic support member according to claim 9, characterized in that: The reinforcing block is located in the middle of the first elastic arm or the second elastic arm.

11. The elastic support member according to any one of claims 1 to 4, characterized in that: The bending portion is U-shaped; The first elastic arm comprises a first part, a second part and a third part which are connected in sequence, the first part is connected to the bending part, and the connecting member is fixed to the third part; The second elastic arm comprises a fourth portion, a fifth portion and a sixth portion which are connected in sequence, and the fourth portion is connected to the bending portion; The first part and the fourth part are arranged in parallel, and the third part and the sixth part are arranged in parallel.

12. A linear motor, characterized in that: include: A housing, wherein a receiving cavity is formed inside the housing; The elastic support member described in any one of claims 1 to 11 is arranged in the accommodating cavity.

13. The linear motor according to claim 12, characterized in that: Two elastic support members are provided, and the two elastic support members are centrally symmetrically arranged with respect to the central axis of the shell.

14. An electronic device, characterized in that: It comprises a housing, a main board and the linear motor according to claim 12 or 13, wherein the main board and the linear motor are both located in the housing, and the linear motor is electrically connected to the main board.

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