Spring system, focus motor, and photographing apparatus

Abstract

A spring system, a focus motor, and a photographing apparatus. The spring system (10) comprises elastic pieces (100), and each elastic piece comprises a fixed portion (1), a movable portion (2), and a first deformation portion (3). The first deformation portion comprises a first elastic arm (31), a second elastic arm (32) and a third elastic arm (33) which are connected in sequence, the end of the first elastic arm distant from the second elastic arm is connected to the fixed portion, the end of the third elastic arm distant from the second elastic arm is connected to the movable portion, and the first elastic arm and the third elastic arm are located on the same side of the second elastic arm. By means of the length relationships of the first elastic arm, the second elastic arm and the third elastic arm in different directions, the spring system can prevent the spring constant of the elastic pieces under a large stroke from being significantly increased, improve the linearity of the elastic pieces under the large stroke, and improve the focusing performance of the focus motor under a long focusing stroke.

Description

Spring system, focusing motor and photographing device

[0001] Cross-reference to related applications

[0002] This application claims priority to the Chinese patent application No. 202411092368.5, filed on August 9, 2024, and entitled “Spring system, focusing motor and photographing device”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of photographing technology, in particular to a spring system, a focusing motor and a photographing device. BACKGROUND

[0004] In recent years, small photographing devices have become very popular and their application range has been continuously expanding, including smart phones, smart glasses, action cameras, law enforcement recorders and car recorders. When taking photos and videos, the photos and videos taken by the device may be blurred or shaky due to external vibrations, affecting the quality of the photos and videos. This problem is more serious when the vibration is more intense or in low light conditions.

[0005] In order to solve the above problems, many small focusing technologies have appeared on the market. Among them, the spring piece focusing motor uses a spring piece to connect the movable structure and the fixed structure. Its working principle is to control the compensation movement of the movable structure relative to the fixed structure by using the interaction between the magnetic field from the magnet and the magnetic field generated when the coil is energized. The compensation movement of the movable structure will pull the spring piece to deform elastically. During the elastic deformation of the spring piece, the tension of the deformed part will cause the spring constant of the spring piece to rise in the direction perpendicular to the plane in which the spring piece is located (i.e., the plane in which the spring piece is located before it deforms elastically).

[0006] The spring piece of the existing focusing motor is a conventional spring piece. When the stroke of the movable structure is large, the tension of the deformed part of the conventional spring piece in the direction perpendicular to the plane in which the spring piece is located is large, thereby causing the spring constant of the spring piece to rise significantly at a large stroke, reducing the linearity of the spring piece at a large stroke, and affecting the accuracy of the compensation movement of the focusing motor at a large stroke, resulting in poor focusing effect of the focusing motor at a long stroke. SUMMARY

[0007] To at least solve one of the technical problems existing in the prior art, the present application aims to provide a spring system, a focusing motor and a photographing device, which can improve the linearity of the spring piece at a large stroke and improve the focusing effect of the focusing motor at a long stroke.

[0008] To achieve the above object, in a first aspect, the present application provides a spring system, comprising a spring sheet, the spring sheet comprising a fixed part, a movable part and a first deformation part; the first deformation part comprising a first elastic arm, a second elastic arm and a third elastic arm connected in sequence, one end of the first elastic arm away from the second elastic arm being connected to the fixed part, one end of the third elastic arm away from the second elastic arm being connected to the movable part, the first elastic arm and the third elastic arm being on the same side of the second elastic arm; wherein, along the X-axis direction, the size of the first elastic arm is W1, and the size of the third elastic arm is W3; along the Y-axis direction, the size of the first elastic arm is L1, and the size of the third elastic arm is L3; satisfying: L1>W1, L3>W3, 0.8L1≤L3≤1.2L1.

[0009] In some embodiments, along the X-axis direction, the size of the second elastic arm is W2; along the Y-axis direction, the size of the second elastic arm is L2; satisfying: L2

[0010] Exemplarily, the third elastic arm comprises a third strip-shaped segment and an arc-shaped connecting segment connected in sequence, one end of the third strip-shaped segment away from the arc-shaped connecting segment being connected to the second elastic arm, one end of the arc-shaped connecting segment away from the third strip-shaped segment being connected to the movable part.

[0011] Exemplarily, the second elastic arm comprises a first arc-shaped segment, a first strip-shaped segment and a second arc-shaped segment connected in sequence; one end of the first arc-shaped segment away from the first strip-shaped segment being connected to the first elastic arm, one end of the second arc-shaped segment away from the first strip-shaped segment being connected to the third elastic arm.

[0012] Alternatively, the second elastic arm comprises a first arc-shaped segment, a first strip-shaped segment, a third arc-shaped segment, a second strip-shaped segment and a second arc-shaped segment connected in sequence, one end of the first arc-shaped segment away from the first strip-shaped segment being connected to the first elastic arm, one end of the second arc-shaped segment away from the first strip-shaped segment being connected to the third elastic arm.

[0013] Optionally, L1>W2, L3>W2.

[0014] In some embodiments, the first elastic arm has opposite first and second end portions, the second elastic arm has opposite third and fourth end portions, the first end portion is connected to the fixed part, the second end portion is connected to the third end portion, and the fourth end portion is connected to the third elastic arm; along the direction from the first end portion to the second end portion, the width of the first elastic arm gradually decreases; the width of the second end portion is equal to the width of the third end portion; the ratio of the average width of the first elastic arm to the average width of the second elastic arm is greater than 3:2.

[0015] In some embodiments, the second elastic arm has opposite third and fourth ends, the third strip-shaped segment has opposite fifth and sixth ends, the third end is connected to the first elastic arm, the fourth end is connected to the fifth end, and the sixth end is connected to the arc-shaped connecting segment; the width of the third strip-shaped segment gradually decreases in the direction from the sixth end to the fifth end; the width of the fifth end is equal to the width of the fourth end; the ratio of the average width of the third elastic arm to the average width of the second elastic arm is greater than 3:2.

[0016] Preferably, L1>3W1, and L3>3W3.

[0017] In some embodiments, the elastic sheet further comprises a second deformation part, which is respectively connected to the fixed part and the movable part and is arranged in axial symmetry with the first deformation part.

[0018] In some embodiments, the elastic sheet further comprises a second deformation part, a third deformation part, and a fourth deformation part, which are respectively connected to the fixed part and the movable part; the first deformation part, the second deformation part, the third deformation part, and the fourth deformation part are arranged in rotational symmetry around the center of the movable part.

[0019] Preferably, the number of the elastic sheets is multiple, and the maximum included angle between the plane where any one of the elastic sheets is located and the XY plane is less than 10°.

[0020] In some embodiments, the multiple elastic sheets comprise a first elastic sheet and a second elastic sheet which are spaced apart along the Z-axis direction.

[0021] In some embodiments, the first elastic sheet and the second elastic sheet are arranged in central symmetry.

[0022] In some embodiments, the number of the first elastic sheets is two, and the two first elastic sheets are spaced apart along the X-axis direction and arranged in central symmetry; the number of the second elastic sheets is two, and the two second elastic sheets are spaced apart along the X-axis direction and arranged in central symmetry.

[0023] In the second aspect, the application further provides a focusing motor, which comprises any one of the spring systems described above, and further comprises a fixed structure and a movable structure; the fixed part of the elastic sheet is connected to the fixed structure, and the movable part of the elastic sheet is connected to the movable structure.

[0024] In some embodiments, the fixed structure comprises a housing and a magnet, the housing has a receiving cavity, the magnet set is arranged in the receiving cavity and connected to the housing, the spring system is arranged in the receiving cavity, and the fixed part is connected to the housing; the movable structure is arranged in the receiving cavity, the movable structure comprises a lens and a coil, the lens is arranged in the receiving cavity, the coil is connected to the lens and arranged opposite to the magnet, and the movable part of the spring sheet is connected to the lens.

[0025] In some embodiments, the movable structure further comprises an electromagnetic damping bracket, the electromagnetic damping bracket is connected to the lens, the electromagnetic damping bracket is provided with a through hole, and the coil is located in the through hole; the material of the electromagnetic damping bracket is a conductive material.

[0026] In some embodiments, the fixed structure further comprises a magnetic conducting sheet, the magnetic conducting sheet is connected to the housing and arranged between the inner wall of the housing and the magnet.

[0027] In some embodiments, along the X-axis direction, the size of the housing is W4; along the Y-axis direction, the size of the housing is L4; and the following conditions are met: 0.125W4

[0028] In some embodiments, the spring system comprises a first spring sheet and a second spring sheet spaced apart along the Z-axis direction; along the Z-axis direction, the minimum distance between the first spring sheet and the second spring sheet is H1, and the length of the housing is H2; and the following condition is met: 0.5H2≤H1.

[0029] In a third aspect, the present application further provides a shooting device comprising the spring system of any one of the above or the focusing motor of any one of the above.

[0030] Compared with the prior art, the spring system, focusing motor, and shooting device of this invention have the following advantages: By employing a first elastic arm, a second elastic arm, and a third elastic arm connected in sequence and limiting L1 > W1, when the movable part moves along the Z-axis direction, causing an increase in the relative distance in the Z-axis direction between J1 (the junction of the movable part and the third elastic arm) and J2 (the junction of the third elastic arm and the second elastic arm), when the spring is subjected to a force in the Z-axis direction, since L1 > W1, the third elastic arm has a larger force in the X-axis direction compared to the Y-axis direction. The maximum elastic deformation is such that J2 moves closer to J1 in the Y-axis direction and reduces the relative distance between J1 and J2 in the Y-axis direction. This reduces the component of the tension of the third elastic arm in the direction perpendicular to the plane of the spring, preventing a significant increase in the spring constant of the spring under a large stroke and improving the linearity of the spring under a large stroke. By limiting L1 > W1, 0.8L1 ≤ L3 ≤ 1.2L1, and the first elastic arm and the third elastic arm being located on the same side of the second elastic arm, the first elastic arm and the third elastic arm are on the same side of the second elastic arm. With relatively similar lengths on one side, the movable part can move along the Z-axis, causing an increase in the relative distance between J4 (the junction of the fixed part and the first elastic arm) and J3 (the junction of the second elastic arm and the first elastic arm) in the Z-axis direction. When the spring is subjected to a force in the Z-axis direction, since L1 > W1, the first elastic arm has a larger maximum elastic deformation in the X-axis direction compared to the Y-axis direction. This causes J3 to move closer to J4 in the Y-axis direction and reduces the relative distance between J4 and J3 in the Y-axis direction, thereby reducing the tension of the first elastic arm. The component of the force in the direction perpendicular to the plane of the spring is further reduced to prevent a significant increase in the spring constant of the spring under a large stroke, thereby further improving the linearity of the spring under a large stroke. In summary, by limiting the length relationship between the first elastic arm and the third elastic arm in different directions, this invention can reduce the component of the tension of the first elastic arm and the third elastic arm in the direction perpendicular to the plane of the spring, prevent a significant increase in the spring constant of the spring under a large stroke, improve the linearity of the spring under a large stroke, and enhance the focusing performance of the focusing motor under a long stroke. Attached Figure Description

[0031] Figure 1 is a schematic diagram of a spring system provided in Embodiment 1 of the present invention;

[0032] Figure 2 is a schematic diagram of the structure of the spring sheet provided in Embodiment 1 of the present invention;

[0033] Figure 3 is a top view of the spring sheet provided in Embodiment 1 of the present invention;

[0034] Figure 4 is a schematic diagram of the first structure of the first deformed part provided in Embodiment 1 of the present invention;

[0035] Fig. 5 is a second structure diagram of the first deformation part according to the first embodiment of the present application;

[0036] Fig. 6 is a structure diagram of a spring system according to the second embodiment of the present application;

[0037] Fig. 7 is a line graph of the z-direction force and the z-direction stroke according to the second embodiment of the present application;

[0038] Fig. 8 is a line graph of the z-direction stroke and the maximum stress according to the second embodiment of the present application;

[0039] Fig. 9 is a structure diagram of a spring system according to the third embodiment of the present application;

[0040] Fig. 10 is a structure diagram of a spring piece according to the third embodiment of the present application;

[0041] Fig. 11 is a structure diagram of the first deformation part according to the third embodiment of the present application;

[0042] Fig. 12 is a structure diagram of a spring system according to the fourth embodiment of the present application;

[0043] Fig. 13 is a structure diagram of a focus motor according to the fifth embodiment of the present application;

[0044] Fig. 14 is a sectional view of the focus motor according to the fifth embodiment of the present application;

[0045] Fig. 15 is an exploded view of the focus motor according to the fifth embodiment of the present application;

[0046] Fig. 16 is a sectional view of a focus motor according to the sixth embodiment of the present application;

[0047] Fig. 17 is an exploded view of the focus motor according to the sixth embodiment of the present application.

[0048] In the figure, 100, a spring piece; 101, a first spring piece; 102, a second spring piece; 1, a fixed part; 2, a movable part; 3, a first deformation part; 31, a first elastic arm; 32, a second elastic arm; 33, a third elastic arm; 311, a first end part; 312, a second end part; 321, a first arc-shaped segment; 322, a first linear segment; 323, a second arc-shaped segment; 324, a third arc-shaped segment; 325, a second linear segment; 331, a third linear segment; 332, an arc-shaped connecting segment; 3211, a third end part; 3231, a fourth end part; 3311, a fifth end part; 3312, a sixth end part; 4, a second deformation part; 5, a third deformation part; 6, a fourth deformation part; J1, an intersection position of the movable part and the third elastic arm; J2, an intersection position of the third elastic arm and the second elastic arm; J3, an intersection position of the second elastic arm and the first elastic arm; J4, an intersection position of the fixed part and the first elastic arm; 10, a spring system; 20, a fixed structure; 201, a housing; 202, a magnet; 203, damping glue; 204, a connecting terminal; 205, a position sensor; 206, a magnetic conducting sheet; 2011, an outer shell; 2012, a base; 2013, a containing cavity; 30, a movable structure; 301, a lens; 302, a coil; 303, an electromagnetic damping support; 304, a lens seat; 3031, a through hole. DETAILED DESCRIPTION

[0049] The specific embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0050] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0051] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0052] In the present application, unless specifically defined otherwise, the terms "mounting", "connected", "connection", "fixed", and the like, should be construed broadly and can include fixed connections, detachable connections, or integral connections; can include mechanical connections, or electrical connections; can include direct connections, or indirect connections via an intermediate medium; can include internal communication between two elements, or interaction between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0053] In the present application, unless specifically defined otherwise, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. "Under", "below" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0054] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0055] In the present application, referring to "embodiments" means that the specific features, structures or properties described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it independent or alternative to other embodiments.

[0056] The present application provides a photographing device, the photographing device comprising any one of the spring system 10 or any one of the focusing motor. The photographing device can be, but is not limited to, a smart phone, smart glasses, a camera, a law enforcement recorder, a driving recorder, and the like.

[0057] In the description of the present application, it should be understood that the terms "X-axis direction", "Y-axis direction", "Z-axis direction", "XY plane" and the like indicate the orientation or positional relationship based on the optical axis of the imaging device, wherein the X-axis direction is perpendicular to the optical axis of the imaging device, the Y-axis direction is perpendicular to the optical axis of the imaging device, the Y-axis direction is perpendicular to the X-axis direction, the Z-axis direction is parallel to the optical axis of the imaging device, and the XY plane is the plane formed by the intersection of the X-axis direction and the Y-axis direction.

[0058] In a first aspect, referring to FIGS. 1-12, the present application provides a spring system 10 comprising a plurality of spring pieces 100. The maximum included angle between the plane of any one spring piece 100 and the XY plane is less than 10°. That is, the plane of the spring piece 100 and the XY plane are substantially parallel, and using a maximum included angle of less than 10° can reduce the total spring constant of the plurality of spring pieces 100 of the spring system 10 in the Z-axis direction, which helps to reduce the power consumption of the focusing motor.

[0059] In the description of the present application, it should be understood that the plane of the spring piece 100 refers to the plane perpendicular to the thickness direction of the spring piece 100.

[0060] Embodiment One

[0061] Referring to FIGS. 1-5, the spring system 10 provided by embodiment one comprises two spring pieces 100, which comprise a first spring piece 101 and a second spring piece 102 spaced apart along the Z-axis direction. In this way, the spring system 10 can be connected to the movable structure 30 and the fixed structure 20 at two positions in the Z-axis direction, respectively. The force generated during the movement of the movable structure 30 in the Z-axis direction can be effectively balanced, and the vibration and deviation caused by unbalanced force can be reduced, thereby improving the stability and precision of the focusing motor.

[0062] The spring piece 100 comprises a fixed portion 1, a movable portion 2, a first deformation portion 3 and a second deformation portion 4, the first deformation portion 3 and the second deformation portion 4 are symmetrically arranged on both sides of the movable portion 2 about the Y-axis, the two ends of the first deformation portion 3 are connected to the fixed portion 1 and the movable portion 2, respectively, and the two ends of the second deformation portion 4 are connected to the fixed portion 1 and the movable portion 2, respectively.

[0063] Referring to FIGS. 1-5, the first deformation portion 3 includes a first elastic arm 31, a second elastic arm 32, and a third elastic arm 33 connected in sequence, one end of the first elastic arm 31 away from the second elastic arm 32 is connected to the fixed portion 1, one end of the third elastic arm 33 away from the second elastic arm 32 is connected to the movable portion 2, the first elastic arm 31 and the third elastic arm 33 are located on the same side of the second elastic arm 32; wherein, along the X-axis direction, the size of the first elastic arm 31 is W1, the size of the second elastic arm 32 is W2, and the size of the third elastic arm 33 is W3; along the Y-axis direction, the size of the first elastic arm 31 is L1, the size of the second elastic arm 32 is L2, and the size of the third elastic arm 33 is L3; it is satisfied that L1> W1, L3> W3, 0.8L1≤ L3≤ 1.2L1.

[0064] By adopting the first elastic arm 31, the second elastic arm 32 and the third elastic arm 33 connected in sequence and defining L1>W1, when the movable part 2 moves along the Z-axis direction to cause the relative distance between J1 (the junction position of the movable part and the third elastic arm) and J2 (the junction position of the third elastic arm and the second elastic arm) in the Z-axis direction to increase, and the spring 100 is subjected to the force in the Z-axis direction, due to L1>W1, the third elastic arm 33 has a larger maximum elastic deformation in the X-axis direction than in the Y-axis direction, so that J2 is close to J1 in the Y-axis direction and the relative distance between J1 and J2 in the Y-axis direction is reduced. By defining L1>W1, 0.8L1≤L3≤1.2L1, and the first elastic arm 31 and the third elastic arm 33 are located on the same side of the second elastic arm 32, the first elastic arm 31 and the third elastic arm 33 have a relatively close length on the same side of the second elastic arm 32, when the movable part 2 moves along the Z-axis direction to cause the relative distance between J3 (the junction position of the second elastic arm and the first elastic arm) and J4 (the junction position of the fixed part and the first elastic arm) in the Z-axis direction to increase, and the spring 100 is subjected to the force in the Z-axis direction, due to L1>W1, the first elastic arm has a larger maximum elastic deformation in the X-axis direction than in the Y-axis direction, so that J3 is close to J4 in the Y-axis direction and the relative distance between J3 and J4 in the Y-axis direction is reduced; due to 0.8L1≤L3≤1.2L1, the relative distance change of J3 and J4 in the Y-axis direction is close to the relative distance change of J1 and J2 in the Y-axis direction, so that the component of the tension of the first elastic arm 31 and the third elastic arm 33 in the direction perpendicular to the plane of the spring 100 can be reduced, the spring constant of the spring 100 in a large stroke can be prevented from rising obviously, and the linearity of the spring 100 in a large stroke is further improved; therefore, by defining the length relationship of the first elastic arm 31 and the third elastic arm 33 in different directions, the component of the tension of the first elastic arm 31 and the third elastic arm 33 in the direction perpendicular to the plane of the spring 100 can be reduced, the spring constant of the spring 100 in a large stroke can be prevented from rising obviously, the linearity of the spring in a large stroke is improved, and the focusing performance of the focusing motor in a long stroke is improved.

[0065] In the embodiment, the thickness direction of the spring 100 is parallel to the Z-axis direction, that is, the plane of the spring 100 is parallel to the XY plane, and the component of the tension of each elastic arm in the direction perpendicular to the plane of the spring 100 is the component of the tension of each elastic arm in the Z-axis direction.

[0066] In other embodiments, the maximum included angle between the plane of the spring 100 and the XY plane can be 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, or any angle less than 10°, which is not limited herein.

[0067] In the description of the present application, it is understood that the length of each structure in the X-axis direction and the length of each structure in the Y-axis direction are respectively described as the X length and the Y length of each structure, for example, the X length of the first elastic arm 31 refers to the size W1 of the first elastic arm 31 in the X-axis direction, the Y length of the first elastic arm 31 refers to the size L1 of the first elastic arm in the Y-axis direction, and so on.

[0068] L1>W1, that is, the Y length of the first elastic arm 31 is greater than the X length, the first elastic arm 31 has a larger maximum elastic deformation in the X-axis direction than in the Y-axis direction, which can improve the anti-impact stability of the first deformation part 3 in the X-axis direction.

[0069] It should be noted that the anti-impact stability refers to the ability of the elastic arm structure to reduce vibration, deviation or nonlinear deformation when subjected to external force (such as displacement or impact in the Z-axis direction), thereby maintaining the stability and functional integrity of the overall system.

[0070] In other embodiments, any limiting manner such as L1>2W1, L1>3W1, L1>4W1, L1>5W1, L1>6W1, L1>7W1, L1>8W1, L1>9W1 and L1>10W1 can be used to make the first elastic arm 31 have a larger maximum elastic deformation in the X-axis direction, which is not limited here.

[0071] L3>W3, that is, the Y length of the third elastic arm 33 is greater than the X length, the third elastic arm 33 has a larger maximum elastic deformation in the X-axis direction than in the Y-axis direction, which can improve the anti-impact stability of the first deformation part 3 in the X-axis direction.

[0072] In other embodiments, any limiting manner such as L3>2W3, L3>3W3, L3>4W3, L3>5W3, L3>6W3, L3>7W3, L3>8W3, L3>9W3, L3>10W3 can be used to make the third elastic arm 33 have a larger maximum elastic deformation in the X-axis direction, which is not limited here.

[0073] In this embodiment, L2

[0074] In other embodiments, 2L2

[0075] The ratio of the minimum width of the first deformation portion 3 to the thickness of the first deformation portion 3 (the thickness refers to the dimension of the first deformation portion 3 in the Z-axis direction) is greater than 2:1. Stress concentration of the first deformation portion 3 can be reduced, and the carrying capacity and service life of the spring can be improved.

[0076] It should be noted that the minimum width of the first deformation portion 3 refers to the narrowest dimension of the first deformation portion 3, which is the minimum geometric dimension among the narrowest dimensions of the first elastic arm 31, the second elastic arm 32, and the third elastic arm 33 of the first deformation portion 3.

[0077] Preferably, the surface of the spring 100 is dark with a visible light reflectance of less than 50%. The dark spring can reduce the chance of glare caused by light reflection.

[0078] In the present embodiment, referring to FIGS. 1-5, the first elastic arm 31 has a strip structure extending along the Y-axis direction, the length direction of the first elastic arm 31 is parallel to the Y-axis direction, and the width direction of the first elastic arm 31 is parallel to the X-axis direction.

[0079] In the present embodiment, the second elastic arm 32 includes a first arc segment 321, a first strip segment 322, a third arc segment 324, a second strip segment 325, and a second arc segment 323 connected in sequence, one end of the first arc segment 321 away from the first strip segment 322 is connected to the first elastic arm 31, and one end of the second arc segment 323 away from the first strip segment 322 is connected to the third elastic arm 33.

[0080] The first elastic arm 31 and the second elastic arm 32 can be naturally and smoothly connected through the first arc-shaped section 321, so as to reduce the stress at the connection position of the first elastic arm 31 and the second elastic arm 32, and help to improve the anti-falling performance of the spring piece 100. The second elastic arm 32 has better structural strength to bear larger load through the first strip-shaped section 322, so as to help to ensure that the second elastic arm 32 maintains stable performance in long-term use. The first strip-shaped section 322 and the second strip-shaped section 325 can be naturally and smoothly connected through the third arc-shaped section 324, and the Y length of the second elastic arm 32 is increased to increase the maximum elastic deformation of the second elastic arm 32 in the X axis direction. The second elastic arm 32 has better anti-falling performance in the Y axis direction through the second strip-shaped section 325 in cooperation with the first strip-shaped section 322. The third elastic arm 33 and the second elastic arm 32 can be naturally and smoothly connected through the second arc-shaped section 323, so as to reduce the stress at the connection position of the third elastic arm 33 and the second elastic arm 32, help to improve the linearity of the spring piece 100, and help to improve the anti-falling performance of the spring piece 100.

[0081] In the embodiment, the first strip-shaped section 322 and the second strip-shaped section 325 are substantially parallel, and the X length of the first strip-shaped section 322 and the X length of the second strip-shaped section 325 are close. The component of the pulling force of the second elastic arm 32 in the direction perpendicular to the plane of the spring piece 100 is reduced, the spring constant of the spring piece 100 under large stroke is further prevented from rising obviously, the linearity of the spring piece 100 under large stroke is further improved, and the focusing performance of the focusing motor under long stroke is further improved.

[0082] Preferably, the X length of the first strip-shaped section 322 and the X length of the second strip-shaped section 325 are equal.

[0083] In the embodiment, the second elastic arm comprises a first arc segment 321, a first strip segment 322, a third arc segment 324, a second strip segment 325 and a second arc segment 323 connected in sequence, in the second elastic arm 32, the length direction of the first arc segment 321 is the circumferential direction of the first arc segment 321, the width direction of the first arc segment 321 is the radial direction of the first arc segment 321, the length direction of the first strip segment 322 is parallel to the X-axis direction, the width direction of the first strip segment 322 is parallel to the Y-axis direction, the length direction of the third arc segment 324 is the circumferential direction of the third arc segment 324, the width direction of the third arc segment 324 is the radial direction of the third arc segment 324, the length direction of the second strip segment 325 is parallel to the X-axis direction, the width direction of the second strip segment 325 is parallel to the Y-axis direction, the length direction of the second arc segment 323 is the circumferential direction of the second arc segment 323, and the width direction of the second arc segment 323 is the radial direction of the second arc segment 323; the third elastic arm 33 comprises a third strip segment 331 and an arc connecting segment 332 connected in sequence, in the third elastic arm 33, the length direction of the third strip segment 331 is parallel to the Y-axis direction, the width direction of the third strip segment 331 is parallel to the X-axis direction, the length direction of the arc connecting segment 332 is the circumferential direction of the arc connecting segment 332, and the width direction of the arc connecting segment 332 is the radial direction of the arc connecting segment 332.

[0084] In the embodiment, referring to FIG. 5, L1>W2 and L3>W2. Defining L1>W2 can make the first elastic arm 31 have a larger length, so as to reduce the angle between the pulling force of the first elastic arm 31 and the plane where the elastic sheet 100 is located, since the larger the angle between the pulling force and the plane where the elastic sheet 100 is located, the greater the component of the pulling force in the Z-axis direction, therefore, by reducing the angle between the pulling force of the first elastic arm 31 and the plane where the elastic sheet 100 is located, the component of the pulling force of the first elastic arm 31 in the Z-axis direction can be reduced, and the linearity of the elastic sheet under a larger stroke can be further improved; similarly, defining L3>W2 can make the third elastic arm 33 have a larger length, so as to reduce the angle between the pulling force of the third elastic arm 33 and the plane where the elastic sheet 100 is located, and then the component of the pulling force of the third elastic arm 33 in the Z-axis direction can be reduced, and the linearity of the elastic sheet under a larger stroke can be further improved.

[0085] In the embodiment, referring to FIGS. 1-5, the first elastic arm 31 has opposite first and second end portions 311 and 312, the second elastic arm 32 has opposite third and fourth end portions 3211 and 3231, the first end portion 311 is connected to the fixed portion 1, the second end portion 312 is connected to the third end portion 3211, and the fourth end portion 3231 is connected to the third elastic arm 33.

[0086] The width of the first elastic arm 31 gradually decreases along the direction from the first end 311 to the second end 312; the width of the second end 312 is equal to the width of the third end 3211; thus, the connection position of the first elastic arm 31 and the second elastic arm 32 can be naturally transitioned.

[0087] The ratio of the average width of the first elastic arm 31 to the average width of the second elastic arm 32 is greater than 3:2. The problem of the spring coefficient of the first elastic arm 31 being too low in the X-axis direction due to the longer Y length can be alleviated.

[0088] Specifically, the measurement method of the average width of the first elastic arm 31 is as follows:

[0089] (1) Prepare the elastic sheet 100 and a vernier caliper that has been calibrated;

[0090] (2) Measure the maximum width of the first elastic arm 31 at the widest position by using the vernier caliper, which is denoted as A max1 ; measure the minimum width of the first elastic arm 31 at the narrowest position by using the vernier caliper, which is denoted as A min1 ;

[0091] (3) The average width of the first elastic arm 31 is A1, A1=(A max1 +A min1 ) / 2.

[0092] In the embodiment, the second elastic arm 32 is of equal width.

[0093] In other embodiments, when the second elastic arm 32 is of unequal width, the average width of the second elastic arm 32 can be obtained by referring to the measurement method of the average width of the first elastic arm 31, which is not described herein.

[0094] In the embodiment, referring to FIGS. 1-5, the third strip segment 331 has opposite fifth and sixth ends 3311 and 3312, the third end 3211 is connected to the first elastic arm 31, the fourth end 3231 is connected to the fifth end 3311, and the sixth end 3312 is connected to the arc-shaped connecting segment 332.

[0095] The width of the third strip segment 331 gradually decreases along the direction from the sixth end 3312 to the fifth end 3311, and the width of the fifth end 3311 is equal to the width of the fourth end 3231. The connection position of the third strip segment 331 and the second elastic arm 32 can be naturally transitioned.

[0096] The width of the sixth end 3312 is equal to the width of the arc-shaped connecting segment 332, and the connection position of the third strip segment 331 and the arc-shaped connecting segment 332 can be naturally transitioned.

[0097] The ratio of the average width of the third elastic arm 33 to the average width of the second elastic arm 32 is greater than 3:2. By limiting the average width of the third elastic arm 33 to be greater than the average width of the second elastic arm 32, the problem of the third elastic arm 33 having too low a spring coefficient in the X-axis direction due to the longer Y length can be alleviated.

[0098] Specifically, the measurement method of the average width of the third elastic arm 33 is as follows:

[0099] (1) Prepare the spring sheet 100 and a calibrated vernier caliper;

[0100] (2) Measure the maximum width of the third elastic arm 33 at the widest position using the vernier caliper, denoted as A max3 , and measure the minimum width of the third elastic arm 33 at the narrowest position using the vernier caliper, denoted as A min3 ;

[0101] (3) The average width of the third elastic arm 33 is A3, A3 = (A max3 +A min3 ) / 2.

[0102] Example Two

[0103] Referring to FIG. 6, different from example one, the spring system 10 provided by the present embodiment includes four spring sheets 100, which include first spring sheets 101 and second spring sheets 102 spaced apart along the Z-axis direction, and the first spring sheets 101 and the second spring sheets 102 are centrally symmetrically arranged.

[0104] The number of the first spring sheets 101 is two, and the two first spring sheets 101 are spaced apart along the X-axis direction and are centrally symmetrically arranged; the number of the second spring sheets 102 is two, and the two second spring sheets 102 are spaced apart along the X-axis direction and are centrally symmetrically arranged. This can reduce the displacement of the spring system 10 in the X-axis direction and the Y-axis direction under the long stroke in the Z-axis direction, and improve the image clarity and stability.

[0105] The performance simulation evaluation method of the average width of the spring system 10 is as follows:

[0106] Specifically, the performance simulation evaluation method of the average width of the spring system 10 is as follows:

[0107] (1) Define the simulation target: evaluate the z-direction stroke, linearity, and maximum stress of the spring sheet design under the action of different z-direction forces;

[0108] (2) Import the model: create a three-dimensional model that needs to be simulated in SOLIDWORKS, or import an existing model from other software;

[0109] (3) Set up the simulation environment: specify the material properties of the model, simulate the clamping and installation method of the model in the real situation, add clamps to the model for constraint, and ensure that the model maintains the correct position and posture during simulation;

[0110] (4) Apply load: according to the actual working condition, apply the corresponding z-direction force to the model. The application of z-direction force needs to accurately simulate the actual situation to ensure the reliability of the simulation results;

[0111] (5) Meshing: discretize the model into a finite number of elements (i.e. mesh);

[0112] (6) Run analysis: set simulation parameters such as solver type, solution accuracy, etc., and start simulation calculation. During the calculation process, SOLIDWORKS will use the finite element analysis (FEA) method to solve the travel and maximum stress of the spring in the model;

[0113] (7) After the simulation calculation is completed, view and analyze the simulation results.

[0114] In the experimental examples and comparative examples provided in the following table, the material of the spring 100 is copper alloy material, L3 = 5.1 mm, and all other conditions are the same except for the value of L1. Among them, the z-direction travel refers to the displacement of the movable part of the spring in the Z-axis direction; under the same z-direction force, the greater the z-direction travel, the longer the focusing travel that the spring can support in the focusing motor; under the same z-direction travel, the smaller the maximum stress, the higher the drop resistance of the spring; the performance simulation evaluation results of the spring 100 are shown in Table 1 as follows:

[0115] Table 1

[0116] As can be seen from Table 1, under the same z-direction force, the closer L1 is to L3, the greater the z-direction travel, and the spring can support a longer focusing travel in the focusing motor.

[0117] According to the data in Table 1, the relationship between the z-direction force and the z-direction travel is shown in Figure 7. As can be seen from Figure 7, the closer L1 is to L3, the better the linearity of the z-direction force and the z-direction travel of the spring, and the better the focusing performance of the focusing motor.

[0118] According to the data in Table 1, the relationship between the z-direction travel and the maximum stress is shown in Figure 8. As can be seen from Figure 8, under the same travel, the closer L1 is to L3, the smaller the maximum stress of the spring, and the higher the drop resistance of the spring.

[0119] Example Three

[0120] Referring to FIGS. 9-11, unlike the first embodiment, the two spring pieces 100 of the spring system 10 provided by the third embodiment are arranged in a central symmetry. The second elastic arm 32 of the spring piece 100 includes a first arc segment 321, a first linear segment 322 and a second arc segment 323 connected in sequence; the first arc segment 321 is connected to the first elastic arm 31 at an end away from the first linear segment 322, and the second arc segment 323 is connected to the third elastic arm 33 at an end away from the first linear segment 322. That is, the second elastic arm 32 of the spring piece 100 provided by the third embodiment does not include the third arc segment 324 and the second linear segment 325 in the first embodiment.

[0121] In the third embodiment, L1 < W2, and L3 < W2.

[0122] Embodiment Four

[0123] Referring to FIG. 12, unlike the first embodiment, the spring piece 100 in the spring system 10 provided by the fourth embodiment further includes a third deformation part 5 and a fourth deformation part 6, the second deformation part 4 is connected to the fixed part 1 and the movable part 2 respectively, the third deformation part 5 is connected to the fixed part 1 and the movable part 2 respectively, and the fourth deformation part 6 is connected to the fixed part 1 and the movable part 2 respectively; the movable part 2 is a square plate structure; the first deformation part 3, the second deformation part 4, the third deformation part 5 and the fourth deformation part 6 are arranged in a rotational symmetry around the center of the movable part 2. The four deformation parts arranged in a rotational symmetry can make the spring piece 100 have a larger maximum elastic deformation in multiple directions, improve the anti-falling performance of the spring system 10 under long stroke, and have high reliability.

[0124] In the fourth embodiment, specifically, the first deformation part 3 coincides with the second deformation part 4 by rotating 90° in the counterclockwise direction around the center of the movable part 2, the first deformation part 3 coincides with the third deformation part 5 by rotating 180° in the counterclockwise direction around the center of the movable part 2, and the first deformation part 3 coincides with the fourth deformation part 6 by rotating 270° in the counterclockwise direction around the center of the movable part 2.

[0125] In a second aspect, referring to FIGS. 13-16, the present application further provides a focusing motor, which includes the spring system 10 in any of the above embodiments, and further includes a fixed structure 20 and a movable structure 30; the fixed part 1 of the spring piece 100 is connected to the fixed structure 20, and the movable part 2 of the spring piece 100 is connected to the movable structure 30.

[0126] Embodiment Five

[0127] Referring to Figs. 13-15, embodiment five provides a focusing motor, the fixed structure 20 of the focusing motor includes a housing 201 and a magnet 202, the housing 201 has a receiving cavity 2013, the magnet 202 is arranged in the receiving cavity 2013 and connected to the housing 201, the spring system 10 is arranged in the receiving cavity 2013, and the fixed part 1 is connected to the housing 201; the movable structure 30 is arranged in the receiving cavity 2013, the movable structure 30 includes a lens 301 and a coil 302, the lens 301 is arranged in the receiving cavity 2013, the coil 302 is connected to the lens 301 and arranged opposite to the magnet 202, and the movable part 2 of the spring is connected to the lens 301.

[0128] Most of the current long-stroke focusing motors set the magnet 202 in the movable structure 30, the magnet 202 is easily attracted and interfered by other magnets 202 near the focusing motor when the movable structure 30 does not need to perform focusing movement, causing the movable structure 30 to move, resulting in the position of the movable structure 30 deviating from the initial preset position, and further affecting the focusing movement of the movable structure 30 from the initial preset position, reducing the focusing effect; because the magnet 202 is heavy, the mass of the movable structure 30 of the focusing motor is high, which is not conducive to focusing stability and reducing power consumption; in the shooting device, because the magnet 202 of the focusing motor is installed on the movable structure 30, the housing 201 of the focusing motor cannot be made of magnetic conductive material, causing the focusing motor to be easily interfered by other magnetic components in the shooting device, so the focusing motor needs to have a large distance with other magnetic components in the shooting device, wasting the installation space in the shooting device.

[0129] The focusing motor provided by the application can drive the movable structure 30 to move when focusing is needed, and can drive the lens 301 to move from the initial preset position to the focusing position when focusing is not needed.

[0130] In the embodiment, the size of the shell 201 along the X-axis direction is W4, and the size of the shell 201 along the Y-axis direction is L4, and 0.125W4

[0131] It should be noted that the drop reliability refers to the ability of a device (such as a focusing motor) to maintain structural integrity and normal function in a drop test.

[0132] The spring system 10 comprises a first elastic sheet 101 and a second elastic sheet 102 distributed along the Z-axis direction.

[0133] In the Z-axis direction, the minimum distance between the first elastic sheet 101 and the second elastic sheet 102 is H1, and the length of the shell 201 is H2, and 0.5H2≤H1 is satisfied. In this way, the ratio of the minimum distance between the first elastic sheet 101 and the second elastic sheet 102 to the length of the shell 201 is greater than or equal to 1:2, so that the two elastic sheets can have a relatively far distance in the Z-axis direction, so that the lens 301 can have a relatively large spring constant in the X-axis direction and the Y-axis direction, and the angle of inclination of the lens 301 caused by the gravity in the X-axis direction and the Y-axis direction is small, thereby reducing the edge blur problem caused by the inclination of the lens 301.

[0134] Specifically, the spring system 10 in embodiment five takes the spring system 10 provided in embodiment one as an example.

[0135] The shell 201 includes an outer shell 2011 and a base 2012, and the base 2012 is connected to the outer shell 2011 and forms a containing cavity 2013 with the outer shell 2011. The fixed structure 20 further includes a damping glue 203, which is arranged in the containing cavity 2013 and connected to the shell 201 and the lens 301. The damping glue 203 can increase the damping coefficient of the spring system 10, thereby reducing the risk of resonance and image blur of the lens 301.

[0136] The material of the elastic sheet 100 is a conductive material. The elastic sheet 100 and the coil 302 are electrically connected; by changing the current of the coil 302, the movable structure 30 can perform single-axis linear motion in the Z-axis direction, achieving the effect of open-loop automatic focusing.

[0137] Optionally, the material of the elastic sheet 100 can be any conductive material such as copper material, copper alloy material, aluminum material, aluminum alloy material, and composite conductive material, which is not limited here.

[0138] Embodiment six

[0139] Referring to FIGS. 16-17, embodiment six provides a focusing motor, which is different from embodiment five in that the movable structure 30 provided by embodiment six further comprises an electromagnetic damping support 303 connected to the lens 301, the electromagnetic damping support 303 is provided with a through hole 3031, and the coil 302 is located in the through hole 3031; the electromagnetic damping support 303 is made of a conductive material. When the electromagnetic damping support 303 moves in the Z-axis direction, the electromagnetic damping support 303 will generate a counter electromotive force and an induced current due to the magnetic field of the magnet 202, according to Faraday's law of electromagnetic induction and Lorentz force principle, the induced current interacts with the magnetic field of the magnet 202 to generate an electromagnetic force opposite to the moving direction of the electromagnetic damping support 303, the electromagnetic force directly acts on the electromagnetic damping support 303 to hinder the movement of the electromagnetic damping support 303 in the Z-axis direction, thereby providing electromagnetic damping and increasing the damping coefficient in the spring system 10, and further reducing the risk of deformation and falling of the movable structure 30 under impact, and improving the reliability of the focusing motor.

[0140] Alternatively, the material of the electromagnetic damping support 303 can be any conductive material such as copper material, copper alloy material, aluminum material, aluminum alloy material, conductive plastic material, conductive rubber material, and composite conductive material, which is not limited herein.

[0141] Specifically, the spring system 10 in embodiment six takes the spring system 10 provided in embodiment two as an example.

[0142] The movable structure 30 further comprises a lens seat 304, the lens 301 is detachably connected in the lens seat 304, and the movable part 2 of the spring piece 100 is connected through the lens seat 304 and the lens 301. By using the lens seat 304, when the focusing motor is defective, the lens 301 can be taken out and reused, thereby reducing the cost.

[0143] The fixed structure 20 further comprises a connection terminal 204 connected to the housing 201 and used for electrically connecting the internal electronic components of the focusing motor and the external electronic components of the focusing motor.

[0144] The movable structure 30 further comprises a position sensor 205 connected to the lens seat 304 and oppositely arranged with the magnet 202. The displacement of the movable structure 30 in the Z-axis direction can be sensed by the position sensor 205 as the feedback of the closed-loop control. By changing the current of the coil 302 and reading the signal of the position sensor 205, the movable structure 30 can perform single-axis linear motion in the Z-axis direction to achieve the effect of closed-loop automatic focusing.

[0145] In some embodiments, an image sensor can also be arranged below the lens 301 to provide an automatic focusing function for the focusing motor, and the image sensor provides an image signal.

[0146] In some embodiments, the position sensor 205 can be added to the driving circuit to form a driving chip with position sensor 205, and the coil 302 is driven by the driving chip to perform closed-loop auto-focusing control; the driving chip can be electrically connected to the electronic components outside the focusing motor through the spring sheet 100 and / or the connection terminal 204.

[0147] The fixed structure 20 further comprises a magnetic conducting sheet 206 connected to the shell 201 and arranged between the inner wall of the shell 201 and the magnet 202. The magnetic conducting sheet 206 can facilitate the assembly of the magnet 202, increase the magnetic field strength through the coil 302, reduce the power consumption of the coil 302, and reduce the magnetic interference on the parts near the focusing motor.

[0148] The above description is only the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and replacements can be made, and these improvements and replacements should be considered as the protection scope of the present application.

Claims

1. A spring system (10), characterized by The elastic sheet (100) comprises a fixed part (1), a movable part (2) and a first deformation part (3); The first deformation part (3) comprises a first elastic arm (31), a second elastic arm (32) and a third elastic arm (33) connected in sequence, one end of the first elastic arm (31) away from the second elastic arm (32) is connected to the fixed part (1), one end of the third elastic arm (33) away from the second elastic arm (32) is connected to the movable part (2), and the first elastic arm (31) and the third elastic arm (33) are located on the same side of the second elastic arm (32); Wherein, along the X-axis direction, the size of the first elastic arm (31) is W1, and the size of the third elastic arm (33) is W3; along the Y-axis direction, the size of the first elastic arm (31) is L1, and the size of the third elastic arm (33) is L3, and the X-axis direction and the Y-axis direction are perpendicular; satisfy: L1>W1, L3>W3, 0.8L1≤L3≤1.2L1.

2. The spring system (10) according to claim 1, characterized in that Along the X-axis direction, the size of the second elastic arm (32) is W2; along the Y-axis direction, the size of the second elastic arm (32) is L2; satisfy: L2 3. The spring system (10) according to claim 2, characterized in that The third elastic arm (33) comprises a third strip segment (331) and an arc-shaped connecting segment (332) connected in sequence, one end of the third strip segment (331) away from the arc-shaped connecting segment (332) is connected to the second elastic arm (32), and one end of the arc-shaped connecting segment (332) away from the third strip segment (331) is connected to the movable part (2).

4. The spring system (10) according to claim 3, characterized in that The second elastic arm (32) comprises a first arc-shaped segment (321), a first strip segment (322) and a second arc-shaped segment (323) connected in sequence; one end of the first arc-shaped segment (321) away from the first strip segment (322) is connected to the first elastic arm (31), and one end of the second arc-shaped segment (323) away from the first strip segment (322) is connected to the third elastic arm (33).

5. The spring system (10) according to claim 3, characterized in that The second elastic arm (32) comprises a first arc-shaped segment (321), a first strip segment (322), a third arc-shaped segment (324), a second strip segment (325) and a second arc-shaped segment (323) connected in sequence, one end of the first arc-shaped segment (321) away from the first strip segment (322) is connected to the first elastic arm (31), and one end of the second arc-shaped segment (323) away from the first strip segment (322) is connected to the third elastic arm (33).

6. The spring system (10) according to claim 5, characterized in that L1>W2, L3>W2.

7. The spring system (10) according to claim 6, characterized in that The first elastic arm (31) has opposite first and second ends (311, 312), the second elastic arm (32) has opposite third and fourth ends (3211, 3231), the first end (311) is connected to the fixed part (1), the second end (312) is connected to the third end (3211), and the fourth end (3231) is connected to the third elastic arm (33); the width of the first elastic arm (31) gradually decreases in the direction from the first end (311) to the second end (312); the width of the second end (312) is equal to the width of the third end (3211). The ratio of the average width of the first elastic arm (31) to the average width of the second elastic arm (32) is greater than 3:

2.

8. The spring system (10) according to claim 7, characterized in that The third bar-shaped segment (331) has opposite fifth and sixth ends (3311, 3312), the third end (3211) is connected to the first elastic arm (31), the fourth end (3231) is connected to the fifth end (3311), and the sixth end (3312) is connected to the arc-shaped connecting segment (332); the width of the third bar-shaped segment (331) gradually decreases in the direction from the sixth end (3312) to the fifth end (3311); the width of the fifth end (3311) is equal to the width of the fourth end (3231). The ratio of the average width of the third elastic arm (33) to the average width of the second elastic arm (32) is greater than 3:

2.

9. The spring system (10) according to claim 1, characterized in that The elastic sheet (100) further comprises a second deformation part (4), the first and second deformation parts (3, 4) are symmetrically arranged on both sides of the movable part (2) about the Y-axis, and the second deformation part (4) is connected to the fixed part (1) and the movable part (2) respectively.

10. The spring system (10) according to claim 1, characterized in that The elastic sheet (100) further comprises a second deformation part (4), a third deformation part (5), and a fourth deformation part (6), the second deformation part (4) is connected to the fixed part (1) and the movable part (2) respectively, the third deformation part (5) is connected to the fixed part (1) and the movable part (2) respectively, and the fourth deformation part (6) is connected to the fixed part (1) and the movable part (2) respectively. The first, second, third, and fourth deformation parts (3, 4, 5, 6) are rotationally symmetrically arranged about the center of the movable part (2).

11. The spring system of any one of claims 1, 2, 3, 5, 6, 7, wherein, The number of the elastic sheets (100) is multiple, and the multiple elastic sheets (100) comprise first and second elastic sheets (101, 102) which are spaced apart along the Z-axis direction.

12. The spring system (10) according to claim 11, characterized in that The first and second elastic sheets (101, 102) are centrally symmetrically arranged.

13. The spring system (10) according to claim 12, characterized in that The number of the first elastic sheets (101) is two, and the two first elastic sheets (101) are spaced apart along the X-axis direction and are centrally symmetrically arranged. The number of the second elastic sheets (102) is two, and the two second elastic sheets (102) are spaced apart along the X-axis direction and are centrally symmetrically arranged.

14. The spring system (10) according to any one of claims 1-10, characterized in that The X-axis direction and the Y-axis direction intersect to form an XY plane, and the maximum angle between the plane where the elastic sheet (100) is located and the XY plane is less than 10°.

15. A focus motor characterized by comprising: The spring system (10) according to any one of claims 1-14, further comprising a fixed structure (20) and a movable structure (30); The fixed part (1) of the elastic sheet (100) is connected to the fixed structure (20), and the movable part (2) of the elastic sheet (100) is connected to the movable structure (30).

16. The focus motor of claim 15, wherein, The fixed structure (20) comprises a shell (201) and a magnet (202), the shell (201) has a receiving cavity (2013), the magnet (202) is arranged in the receiving cavity (2013) and connected to the shell (201), the spring system (10) is arranged in the receiving cavity (2013), and the fixed part (1) is connected to the shell (201); The movable structure (30) is arranged in the receiving cavity (2013), the movable structure (30) comprises a lens (301) and a coil (302), the lens (301) is arranged in the receiving cavity (2013), the coil (302) is connected to the lens (301) and arranged opposite to the magnet (202), and the movable part (2) of the elastic sheet (100) is connected to the lens (301).

17. The focus motor of claim 16, wherein, The movable structure (30) further comprises an electromagnetic damping support (303), the electromagnetic damping support (303) is connected to the lens (301), and the electromagnetic damping support (303) is provided with a through hole (3031), and the coil (302) is located in the through hole (3031); The electromagnetic damping support (303) is made of a conductive material.

18. The focus motor of claim 17, wherein, The fixed structure (20) further comprises a magnetic conductive sheet (206), the magnetic conductive sheet (206) is connected to the shell (201) and arranged between the inner wall of the shell (201) and the magnet (202).

19. The focus motor of claim 16, wherein, Along the X-axis direction, the size of the shell (201) is W4, and the size of the second elastic arm (32) is W2; along the Y-axis direction, the size of the shell (201) is L4; and the following conditions are met: 0.125W4W2, 0.6L4L3.

20. The focus motor according to any one of claims 15-19, wherein, The elastic sheet (100) comprises first elastic sheets (101) and second elastic sheets (102) which are spaced apart along a Z-axis direction, and the X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other; Along the Z-axis direction, the minimum distance between the first elastic sheet (101) and the second elastic sheet (102) is H1, and the size of the shell (201) is H2; and the following condition is met: 0.5H2≤H1.

21. An imaging device, comprising: The spring system according to any one of claims 1-14 or the focusing motor according to any one of claims 15-20.

Images