CN111130303A

CN111130303A - Be applied to two string silk 3D of VCM motor spring piece subassembly down of bending

Info

Publication number: CN111130303A
Application number: CN202010049683.5A
Authority: CN
Inventors: 卢煌杰; 白华
Original assignee: Chengdu Yixun Photoelectric Technology Co Ltd
Current assignee: Chengdu Yixun Photoelectric Technology Co Ltd
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2020-05-08

Abstract

The application discloses a double-chord wire 3D bending lower spring assembly applied to a VCM motor, which consists of four lower spring units which are opposite pairwise and are arranged in a central symmetry manner, wherein each lower spring unit consists of a vertical spring sheet unit and a horizontal spring sheet unit which are integrally formed and are mutually connected in a 90-degree bending manner; the horizontal elastic sheet unit is arranged on one side close to the inner side wall of the vertical elastic sheet unit, and two ends of the horizontal elastic sheet unit are connected with the vertical elastic sheet unit through the double-string wire elastic sheet to form an integral structure. The problem that a single-string structure is difficult to achieve strength and stress balance can be solved by adopting a double-string design, if the width is too wide, the resistance generated by the lower spring piece is large, the design stress cannot be adjusted to be below the yield stress of the spring raw material, and the focal length adjusting effect is poor; if the width of the string wire is designed to be too small, the elastic coefficient of the spring cannot meet the design requirement, the requirement of a customer cannot be met, and meanwhile, the problem that the wire is broken easily in the installation and use processes due to too small spring wire is solved.

Description

Be applied to two string silk 3D of VCM motor spring piece subassembly down of bending

Technical Field

The invention relates to the field of precision micro-electromechanical equipment, in particular to a lower spring piece for realizing lens adjustment in a VCM (Voice coil Motor), and particularly relates to a double-chord wire 3D bending lower spring piece assembly applied to the VCM.

Background

A Voice Coil Motor (also called VCM Motor) is a device that converts electrical energy into mechanical energy and realizes linear and limited swing motion. The device generates regular movement by utilizing the interaction between the magnetic field from the permanent magnetic steel and the magnetic poles in the magnetic field generated by the conductor of the electrified coil. Since the voice coil motor is a non-commutating type power device. The main components are simple, coils, springs, magnets, hall and IC devices and some fixed structures. The spring of the voice coil motor is generally divided into an upper spring and a lower spring, and the main function of the spring is to fix the lens and the fixing mechanism thereof so that the lens can simultaneously move along the axial direction, the radial direction or the axial/radial direction under the electromagnetic action of the coil to balance the electromagnetic force and limit the moving displacement of the lens.

The structure of the existing voice coil motor lower spring is very simple, and although the design concept and the matching lens are different according to different manufacturers, the whole structure is basically consistent. The lens carrier is connected with the voice coil motor and achieves the effect of similar suspension through the connection effect of the springs, as long as slight current generates the effect of acting on the lens carrier through the interaction of an electromagnetic coil arranged on the lens carrier and a permanent magnet arranged on a shell of the voice coil motor, and finally the movement of the lens is achieved, so that the effects of adjusting the focal length and the like are achieved.

Prior art 1: the chinese invention patent, publication No. CN 104460180B, discloses a voice coil motor for realizing optical anti-shake by open-loop translation, and the patent document specification and the specification drawings thereof specifically disclose a lower spring plate, and the whole plane arrangement mode adopted by the lower spring plate can be clearly seen by combining the text part of the patent specification and the drawings thereof. The mode is a traditional voice coil motor and is also a mainstream design mode at present, and the voice coil motor has the advantage that the structure of the lower spring can be correspondingly designed according to the weight of a lens and a fixed carrier structure thereof which are actually matched with the voice coil motor, the number of turns of a coil and the design size of current. However, the disadvantage is that as the lens becomes larger and the thrust becomes larger, the spring reaches the designed elastic coefficient by simply increasing the width of the spring under the condition that the design space of the VCM motor is limited, and the stress of the spring exceeds the yield stress of the spring raw material, so that the spring is easy to break during the life test and the mechanical test. The product structure is influenced, and the use effect is poor; meanwhile, the lower spring piece in the same plane design can only move along the axial direction of the lens, namely, the focal length is adjusted, but cannot be adjusted along the radial direction of the lens, namely, the anti-shake effect is poor.

Prior art 2: chinese design patent, application number: 201530035691.4, the appearance discloses a lower spring plate for voice coil motor with inner and outer double-layer structure, which can be clearly seen and confirmed by the front view and the back view combined with the left and right view or the pitching view, the lower spring plate disclosed by the technology still adopts a type plane type, and the inner spring ring and the outer spring ring are connected by four tiny string wires arranged in S shape, so as to realize the adjustment movement of the lens in the axial direction; meanwhile, although the S-shaped wires are arranged on the same plane, radial adjustment within a certain range can be realized due to the fact that the S-shaped wires are very small, and the anti-shaking effect can be achieved. The main direction of the structure is focusing adjustment.

It can be seen from the above analysis of the two typical prior art that the existing voice coil motor lower spring design is mainly designed for the focus adjustment, the anti-shake effect cannot be well considered, and meanwhile, the single-layer string wires designed on the same plane have disadvantages in terms of width. Therefore, a brand-new voice coil motor lower spring is provided to solve the technical problems, which are particularly important and necessary, so that the existing digital lens can achieve a better shooting effect.

Disclosure of Invention

In order to solve the problems that the balance of strength and stress design is difficult to achieve by adopting a single-string structure when a lower spring of a voice coil motor in the prior art is large in a large lens and large in thrust, if the width is too wide, the resistance generated by the lower spring piece is large, the design stress is easy to increase (even exceeds the yield stress), the adjustment is difficult, and the focal length adjustment effect is poor; if the width of the string wire is designed to be too small, the design requirement for designing the elastic coefficient of the spring cannot be met, and meanwhile, the problem that the string wire is easy to break in the installation and use processes is solved.

Meanwhile, the existing lower spring piece adopts a structure designed in the same plane, the structural design is mainly to adjust the focal length setting for the axial movement along the lens, and the radial adjustment of the lens is not ideal to realize the anti-shake effect. The application provides a be applied to spring assembly under two string silk 3D of VCM motor bends, structural thought through abandoning traditional planar design adopts the three-dimensional design of pertinence, adopts planar design to the focus adjustment of camera lens axial, to the anti-shake effect adopt with the spring leaf realization of adjusting the spring string silk vertically of focus to can realize focusing and anti-shake atress alone, adjust alone, can compromise focusing and anti-shake simultaneously. Moreover, the lower spring piece structure for focusing adopts a double-string wire design, so that the problems that the lower spring piece structure is easy to break due to overlarge stress and has high installation difficulty are solved, and the problems that the lower spring piece structure is not easy to break due to overlarge width of the string wire, so that the design stress of the spring is overlarge, and the spring is not easy to break during mechanical tests and service life tests are solved.

In order to achieve the above object, the present application provides the following technical solutions:

a double-chord wire 3D bending lower spring assembly applied to a VCM motor comprises four lower spring units which are arranged in a central symmetry mode in a pairwise opposite mode, wherein each lower spring unit comprises a vertical spring unit and a horizontal spring unit which are integrally formed and are connected in a 90-degree bending mode; the plane of the vertical spring unit is parallel to the focusing axis of a lens mounted in the VCM motor, so that the elastic deformation direction of the vertical spring unit is consistent with the radial direction of the lens, and the anti-shake adjustment is realized; in a similar way, the horizontal elastic sheet unit is arranged along the radial direction of the lens, and the elastic deformation of the horizontal elastic sheet unit is square and consistent with the axial direction of the lens, so that focusing is realized. That is to say, focusing and anti-shake of the lens are in two mutually perpendicular directions, namely, the axial direction and the radial direction of the lens, however, the invention aims at setting the lower spring unit into a three-dimensional structure which is bent mutually perpendicular, and adopts adjustment and anti-shake of the focal length corresponding to the horizontal spring sheet unit and the vertical spring sheet unit respectively, so that the advantage of the setting is that the problem of poor anti-shake effect caused by non-linear elasticity and incapability of realizing accurate adjustment when the adjustment is carried out in the direction coinciding with the plane where the spring sheet body is located due to the fact that the adjustment is carried out by adopting the same plane structure in the prior art to finish the adjustment in an angle of 90 degrees mutually is avoided. The above meaning relating to the linearity of the spring force means: the spring piece is in the elastic deformation range, and the external force and the deformation quantity are in a linear relation, so that accurate calculation can be facilitated. If the elasticity does not change linearly and is interfered by various factors, the elasticity is confirmed only by means of sample experiments, so that not only the precision is lost, but also the operation difficulty is high, and the focusing and anti-shaking effects are obviously and negatively influenced.

The end head of the free end of the horizontal elastic sheet unit is provided with a first connecting hole for connecting a lens carrier, the end head of the free end of the vertical elastic sheet unit is provided with a third connecting hole for connecting a VCM motor base, and the end head of one end of the horizontal elastic sheet unit connected with the vertical elastic sheet unit is provided with a second connecting hole for connecting a support which is suspended between the base and the lens carrier; the effect of first connecting hole, second connecting hole and third connecting hole have two: one is used for positioning a connecting structure so as to ensure the convenience and accuracy of installation; and secondly, the vertical elastic sheet unit and the horizontal elastic sheet unit are convenient to weld and electrify, not only the elastic sheet connection effect is required to be achieved, and the lens is suspended and moved, but also the wire conduction effect is required to be achieved, and the vertical elastic sheet unit and the horizontal elastic sheet unit are used for supplying power to a coil arranged on a lens carrier. It should be understood that the above description of the operation and principle is only for the purpose of facilitating understanding of the technical effects brought by the novel structural design of the present invention, and is not intended to be protected, and the working principle related to the installation of the coil and the precise focusing of the lens driven by the electromagnetic action is already in the prior art and known to those skilled in the art, and is not related to the present application; the reference is only used to further illustrate the delicate design of the present application, and the beneficial effects of the anti-shake and focusing effects.

The horizontal elastic sheet unit is arranged on one side close to the inner side wall of the vertical elastic sheet unit, and two ends of the horizontal elastic sheet unit are connected with the vertical elastic sheet unit through the double-string wire elastic sheet to form an integral structure. The double-string wire elastic sheet solves the technical problems that the strength and the stress of a single-string wire formed by the sum of the widths of two string wires are easier to control and softer, solves the problem of the contradiction of stress increase caused by the increase of the elastic coefficient of a spring, is more suitable for controlling a coil in a voice coil motor, and solves the technical problems of large internal stress and inconvenience for adjustment; meanwhile, as the two string wires are stressed simultaneously, the cable is better in strength and reliability compared with a single thin string wire, is not easy to break abnormally, is small in self-deformation amount in the installation process, is more beneficial to installation, and improves the assembly efficiency and the problem of the inclination of an axis shaft in product characteristics.

As the preferable structural design of the application: the vertical elastic sheet unit comprises a first vertical elastic sheet and a second vertical elastic sheet which are mutually perpendicular and connected, the free end of the first vertical elastic sheet is fixedly connected with the base through the third connecting hole in a positioning mode, and the second vertical elastic sheet is fixedly connected with the horizontal elastic sheet unit. First vertical shell fragment is the effect of perpendicular connection setting with the vertical shell fragment of second and has two: one is that the actual adjusting direction corresponding to the vertical elastic sheet is the radial direction of the lens, namely the X-Y plane of the world coordinate, and the magnetic force calculation corresponding to the electromagnetic coil for the anti-shake design is more facilitated through the first vertical elastic sheet and the second vertical elastic sheet which are perpendicular to each other. And secondly, the shapes of a support and a base in the voice coil motor can be perfectly matched, and the voice coil motor is convenient to mount.

As a preferred technical scheme of the invention: the first vertical elastic sheet and the second vertical elastic sheet are fixedly connected through a fold joint arranged at the joint. Because first vertical shell fragment and second vertical shell fragment all are straight strip structure, its elastic deformation possesses linear law, possesses the magnitude relation of accurate calculation deflection (the displacement distance value that needs the regulation of anti-shake regulation promptly) and the magnetic force of exerting more. The purpose of setting up the fold joint is to reduce very probably because of the influence of the small deformation that the connection position of first vertical shell fragment and second vertical shell fragment produced to whole vertical shell fragment unit deformation linear law. The fold joint is adopted, so that the fold joint basically has no elastic deformation amount compared with the straight first vertical elastic sheet and the straight second vertical elastic sheet due to large deformation curvature of the fold joint, and deformation amount of the whole vertical elastic sheet unit is ensured to be from the first vertical elastic sheet and the second vertical elastic sheet which have linear elastic change rules.

Preferably, a reinforcing sheet for increasing the bending strength of the corrugated joint is arranged on one of the upper end face and the lower end face of the corrugated joint, and the reinforcing sheet is parallel to the plane where the double-string wire elastic sheet is located. The effect of setting up the enhancement piece is the resistance to deformation ability that strengthens fold joint, because strengthen the piece in the X-Y plane, the radial plane of camera lens promptly, the plane that anti-shake skew direction place does not have deformability for the fold joint self takes place the possibility that deformation influences the anti-shake and is zero, promotes anti-shake's adjustment accuracy.

Preferably, the fold joint is an arc-shaped sheet bent by 90 degrees, and a plurality of fold-resistant folds are arranged on the arc-shaped sheet. The purpose of setting up a plurality of folds is to guarantee that the resistance to deformation ability of fold joint up and down terminal surface is even, and although the anti deformability that the enhancement piece played is fine, in the time of actually setting up, based on installation space's restriction or for the convenience of assembly, be not convenient for all set up the enhancement piece at fold joint up and down terminal surface, so the fold also has very important anti shape effect, has substantial meaning to the accurate calculation of the anti-shake of realization camera lens. The number of the folds is 2-5. The number of the folds is set by taking the factors into consideration mainly the size of the structure, and the size is preferably that the maximum radius of the folds is 10-15% of the bending radius of the fold joints.

As a preferred technical solution of the present invention, specifically, the two-string elastic sheet is composed of two inner string wires and two outer string wires which are in the same plane and arranged at the same interval and/or width. And two free ends of the lower spring unit are provided with reserved welding sheets for power-on welding.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a left side view of FIG. 2;

fig. 4 is a perspective view of the lower spring unit;

FIG. 5 is an assembly view of the lower spring plate assembly and the base;

FIG. 6 is an assembly view of the lens carrier, mount and lower spring assembly;

FIG. 7 is a schematic view of an orientation for placing the present application in a world coordinate system.

In the figure: 1-a lower spring leaf assembly; 2-a base; 3-support; 4-a lens carrier;

10-lower spring unit; 11-a double-string wire shrapnel; 111-inner string; 112-outer chord wire; 12-a first connection hole; 13-a second connection hole;

21-a third connection hole; 22-a first vertical spring sheet; 23-crimp joints; 24-a second vertical spring sheet; 25-reinforcing sheet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application. Furthermore, the appearances of the terms "first," "second," and the like in the description herein are only used for distinguishing between similar elements and are not intended to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present application do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example 1:

the double-chord wire 3D bending lower spring assembly applied to the VCM motor and shown in the attached drawings 1-6 of the specification is composed of four lower spring units 10 which are arranged in a central symmetry mode in a pairwise opposite mode, wherein each lower spring unit 10 is composed of a vertical spring sheet unit and a horizontal spring sheet unit which are integrally formed and are connected in a 90-degree bending mode; the plane of the vertical spring unit is parallel to the focusing axis of a lens mounted in the VCM motor, so that the elastic deformation direction of the vertical spring unit is consistent with the radial direction of the lens, and the anti-shake adjustment is realized; in a similar way, the horizontal elastic sheet unit is arranged along the radial direction of the lens, and the elastic deformation of the horizontal elastic sheet unit is square and consistent with the axial direction of the lens, so that focusing is realized. That is to say, focusing and anti-shake of the lens are in two mutually perpendicular directions, namely, the axial direction and the radial direction of the lens, however, the invention aims at setting the lower spring unit into a three-dimensional structure which is bent mutually perpendicular, and adopts adjustment and anti-shake of the focal length corresponding to the horizontal spring sheet unit and the vertical spring sheet unit respectively, so that the advantage of the setting is that the problem of poor anti-shake effect caused by non-linear elasticity and incapability of realizing accurate adjustment when the adjustment is carried out in the direction coinciding with the plane where the spring sheet body is located due to the fact that the adjustment is carried out by adopting the same plane structure in the prior art to finish the adjustment in an angle of 90 degrees mutually is avoided.

The end head of the free end of the horizontal spring sheet unit is provided with a first connecting hole 12 for connecting a lens carrier 4, the end head of the free end of the vertical spring sheet unit is provided with a third connecting hole 21 for connecting a VCM motor base 2, and the end head of one end of the horizontal spring sheet unit connected with the vertical spring sheet unit is provided with a second connecting hole 13 for connecting a support 3 suspended between the base 2 and the lens carrier 4; the first connecting hole 12, the second connecting hole 13 and the third connecting hole 21 have two functions: one is used for positioning a connecting structure so as to ensure the convenience and accuracy of installation; and secondly, the vertical elastic sheet unit and the horizontal elastic sheet unit are convenient to weld and electrify, not only the elastic sheet connection effect is required to be achieved to enable the lens to be suspended and moved, but also the wire conduction effect is required to be achieved, and the vertical elastic sheet unit and the horizontal elastic sheet unit are used for supplying power to a coil arranged on the lens carrier 4. It should be understood that the above description of the operation and principle is only for the purpose of facilitating understanding of the technical effects brought by the novel structural design of the present invention, and is not intended to be protected, and the working principle related to the installation of the coil and the precise focusing of the lens driven by the electromagnetic action is already in the prior art and known to those skilled in the art, and is not related to the present application; the reference is only used to further illustrate the delicate design of the present application, and the beneficial effects of the anti-shake and focusing effects.

The horizontal elastic sheet unit is arranged on one side close to the inner side wall of the vertical elastic sheet unit, and two ends of the horizontal elastic sheet unit are connected with the vertical elastic sheet unit through the double-string wire elastic sheet 11 to form an integral structure. The double-string wire elastic sheet 11 solves the technical problems that the strength and the stress of a single-string wire formed by the sum of the widths of two string wires are easier to control and softer, is more suitable for controlling a coil in a voice coil motor, and solves the technical problems of large internal stress and inconvenience in adjustment; meanwhile, as the two string wires are stressed simultaneously, the cable is better in strength and reliability than a single thin string wire, is not easy to break abnormally, has small self-deformation in the installation process, is more beneficial to installation and improves the assembly efficiency.

The principle of focusing and anti-shake of the lens in this embodiment is as follows: before proceeding to the explanation of the principle, in order to better explain the advantages of the present invention, the existing adjusting principle is first briefly explained. The adjustment of the focal length is realized by changing the distance between the lens and the photosensitive element, and from the analysis of the movement angle, the lens performs reciprocating motion in a smaller range along the axial direction to change the specific realization of zooming and focusing between the lens and the photosensitive element, so as to obtain a clearer image. Similarly, the anti-shake function is implemented by applying an acceleration motion to the lens in a radial direction in a direction opposite to the actual acceleration of the lens to counteract shake caused by moving the lens due to external force. Meanwhile, the driving force for driving the lens to move in the radial plane and the driving force for driving the lens to move in the axial plane are realized by the action of magnets arranged on the base 2 or the lens carrier 4, and the elastic force generated by the lower spring assembly is overcome by electromagnetic force to finally drive the lens to move in the radial direction so as to realize anti-shake or drive the lens to move in the axial direction so as to realize focusing. The radial direction is defined as the X-Y coordinate in the world coordinate system, specifically the orientation shown in fig. 7, and then the movement in the axial direction is the Z coordinate. For the present embodiment, the first connection holes 12 are connected to the lens carrier 4, and since there are four horizontal spring units uniformly distributed, the lens carrier 4 is connected to the support 3 in a floating manner through the four double-string wire springs 11, and the support 3 is connected to a position where the second connection holes 13 are disposed on another segment of the double-string wire springs 11. The double-string wire elastic sheet 11 is arranged along the radial X-Y plane, so that the lens can move along the axial direction of the lens, namely the Z axis, and the focusing is realized. It is worth mentioning that: the lens carrier 4 and the support 3 for fixedly connecting the lens are connected through the structure of four double-chord wire elastic sheets 11 to form a suspension structure capable of axially moving mutually.

Furthermore, the third connecting hole 21 is fixedly connected with the base 2, so that the support 3 is connected with the base 2 through the four vertical elastic sheet units, and the vertical elastic sheet units are arranged along the axial direction Z axis direction, so that the vertical elastic sheet units can move on the radial plane X-Y plane to realize anti-shake adjustment. At this time, the support 3 and the base 2 are connected through four vertical elastic sheet units to form a suspension structure which can move in a radial plane. The lens is kept static relatively without the action of other external force, and is correspondingly adjusted after receiving radial or axial external force so as to realize focusing or anti-shake action. The driving force for driving the two-string wire elastic sheet 11 to move in the axial Z-axis direction and driving the vertical elastic sheet unit to move in the radial plane X-Y comes from the electromagnetic coil, which is not different from the prior art and has been mentioned in the background art and the description, and thus is not described herein.

Example 2:

for better explaining the present invention, based on the structure and principle of embodiment 1, and further with reference to the contents shown in fig. 1-7 of the specification, the vertical spring piece unit includes a first vertical spring piece 22 and a second vertical spring piece 24 which are vertically connected to each other, a free end of the first vertical spring piece 22 is fixedly connected to the base 2 through the third connecting hole 21, and the second vertical spring piece 24 is fixedly connected to the horizontal spring piece unit. First vertical shell fragment 22 is the effect that the perpendicular connection set up with second vertical shell fragment 24 and has two: one is that the actual adjustment direction corresponding to the vertical spring plate is the radial direction of the lens, i.e. the X-Y plane of the world coordinate, and the magnetic force calculation corresponding to the electromagnetic coil for the anti-shake design is facilitated through the first vertical spring plate 22 and the second vertical spring plate 24 which are perpendicular to each other. And secondly, the shapes of a support and a base in the voice coil motor can be perfectly matched, and the voice coil motor is convenient to mount.

As a preferred technical scheme of the invention: the first vertical elastic sheet 22 and the second vertical elastic sheet 24 are fixedly connected through a corrugated joint 23 arranged at the joint. Because the first vertical elastic piece 22 and the second vertical elastic piece 24 are both straight strip-shaped structures, the elastic deformation of the first vertical elastic piece and the second vertical elastic piece has a linear rule, and the size relationship between the displacement distance value required to be adjusted by accurately calculating the deformation, namely the anti-shake adjustment, and the applied magnetic force is further provided. The purpose of the corrugated joint 23 is to reduce the influence of the small deformation generated at the connection portion of the first vertical elastic sheet 22 and the second vertical elastic sheet 24 on the linear deformation law of the whole vertical elastic sheet unit. The fold joint 23 is adopted for the purpose, because the fold joint 23 has a large deformation curvature, and basically has no elastic deformation amount compared with the straight first vertical elastic piece 22 and the straight second vertical elastic piece 24, the deformation amount of the whole vertical elastic piece unit is ensured to be from the first vertical elastic piece 22 and the second vertical elastic piece 24 with linear elastic change rules.

Preferably, a reinforcing sheet 25 for increasing the bending strength of the crimp joint 23 is selectively arranged on the upper end surface and the lower end surface of the crimp joint 23, and the reinforcing sheet 25 is parallel to the plane of the twinned wire spring plate 11. The reinforcing sheet 25 is arranged to reinforce the deformation resistance of the folded joint 23, and the reinforcing sheet 25 does not have deformation capacity on the X-Y plane, namely the radial plane of the lens, and the plane where the anti-shake deviation direction is located, so that the possibility that the folded joint 23 deforms to influence the anti-shake effect is zero, and the anti-shake adjustment precision is improved.

Further preferably, the folding joint 23 is an arc-shaped sheet bent by 90 degrees, and a plurality of folding-resistant folds are arranged on the arc-shaped sheet. The purpose of setting up a plurality of folds is to guarantee that the resistance to deformation ability of fold joint 23 up and down terminal surface is even, and although the anti deformability that reinforcing piece 25 played is fine, in the time of the actual setting, based on the restriction of installation space or for the convenience of assembly, be not convenient for all set up reinforcing piece 25 at fold joint 23 up and down terminal surface, so the fold also has very important anti shape effect, has substantial meaning to the accurate calculation of the anti-shake of realization camera lens. The number of the folds is 2-5. The number of the folds is considered to be mainly the size of the structure, and the size is preferably 10-15% of the maximum radius of the folds of the fold joint 23.

As a preferred technical solution of the present invention, specifically, the two-string shrapnel 11 is composed of two inner string wires 111 and two outer string wires 112 which are in the same plane and are arranged at the same interval and/or width. Two free ends of the lower spring unit 10 are provided with reserved welding sheets for power-on welding. And a notch for welding by adopting silver paste is further formed at one end close to the third connecting hole 21. The purpose of setting up the breach is for silver thick liquid welding provides the requisite condition, has both guaranteed the product circular telegram effect, has also promoted the operating efficiency, has reduced equipment cost, has promoted the reliability of product, has guaranteed the cleanliness of product, promotes product quality. At present, the lower spring piece and the base are welded in a limited space in the industry, and the following mode is generally adopted; firstly, PIN foot characteristics are made on the elastic sheet, then the PIN foot is bent, and then the solder paste is used for welding with the base, and the method has the following defects: 1. when the PIN foot on the elastic sheet is bent, the bending angle can not be ensured to be vertical to 90 degrees; the PIN foot is easy to break during welding, so that the material waste is caused, and the material cost is increased. 2, the PIN is small in position, the requirements on the precision of a bending machine table and a jig are high, and the equipment cost is increased; 3. the problems of tin explosion, rosin and the like are easily caused by using the tin paste for welding, so that the cleanness of the product is influenced; the method in the embodiment can also completely avoid the defects in the prior art.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a be applied to two string silk 3D of VCM motor spring piece subassembly down of bending which characterized in that: the spring is characterized by comprising four lower spring units (10) which are arranged in a central symmetry manner in pairs, wherein each lower spring unit (10) consists of a vertical spring sheet unit and a horizontal spring sheet unit which are integrally formed and are mutually bent and connected in 90 degrees;

the free end of the horizontal spring plate unit is provided with a first connecting hole (12) for connecting a lens carrier (4), the free end of the vertical spring plate unit is provided with a third connecting hole (21) for connecting a VCM motor base (2), and the end of one end of the horizontal spring plate unit connected with the vertical spring plate unit is provided with a second connecting hole (13) for connecting a support (3) between the suspension and the base (2) and the lens carrier (4);

the horizontal elastic sheet unit is arranged on one side close to the inner side wall of the vertical elastic sheet unit, and two ends of the horizontal elastic sheet unit are connected with the vertical elastic sheet unit through a double-string wire elastic sheet (11) to form an integral structure.

2. The double-chord wire 3D bending lower spring assembly applied to the VCM motor according to claim 1, is characterized in that: the vertical elastic sheet unit comprises a first vertical elastic sheet (22) and a second vertical elastic sheet (24) which are vertically connected with each other, the free end of the first vertical elastic sheet (22) is fixedly connected with the base (2) in a positioning mode through the third connecting hole (21), and the second vertical elastic sheet (24) is fixedly connected with the horizontal elastic sheet unit.

3. The double-chord wire 3D bending lower spring assembly applied to the VCM motor according to claim 2, wherein: the first vertical elastic sheet (22) is fixedly connected with the second vertical elastic sheet (24) through a fold joint (23) arranged at the joint.

4. The double-chord wire 3D bending lower spring assembly applied to the VCM motor, according to claim 3, is characterized in that: one of the upper end face and the lower end face of the corrugated joint (23) is provided with a reinforcing sheet (25) for increasing the bending strength of the corrugated joint (23), and the reinforcing sheet (25) is parallel to the plane where the two-string wire elastic sheet (11) is located.

5. The double-chord wire 3D bending lower spring assembly applied to the VCM motor according to claim 4, wherein: the fold joint (23) is an arc-shaped sheet bent by 90 degrees, and a plurality of fold-resistant folds are arranged on the arc-shaped sheet.

6. The double-chord wire 3D bending lower spring assembly applied to the VCM motor, according to claim 5, is characterized in that: the number of the folds is 2-5.

7. The double-chord wire 3D bending lower spring assembly applied to the VCM motor according to claim 1, is characterized in that: the double-string wire elastic sheet (11) is composed of two inner string wires (111) and two outer string wires (112) which are positioned in the same plane and are arranged at the same interval and/or width.

8. The double-chord wire 3D bending lower spring assembly applied to the VCM motor according to claim 1, is characterized in that: and two free ends of the lower spring unit (10) are provided with reserved welding sheets for power-on welding.

9. The double-chord wire 3D bending lower spring assembly applied to the VCM motor according to claim 1, is characterized in that: and a notch for welding by adopting silver paste is further formed at one end close to the third connecting hole (21).