CN111130303B - A double-string 3D bending lower spring sheet assembly for VCM motor - Google Patents
A double-string 3D bending lower spring sheet assembly for VCM motor Download PDFInfo
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- CN111130303B CN111130303B CN202010049683.5A CN202010049683A CN111130303B CN 111130303 B CN111130303 B CN 111130303B CN 202010049683 A CN202010049683 A CN 202010049683A CN 111130303 B CN111130303 B CN 111130303B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/035—DC motors; Unipolar motors
- H02K41/0352—Unipolar motors
- H02K41/0354—Lorentz force motors, e.g. voice coil motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/18—Leaf springs
- F16F1/182—Leaf springs with inter-engaging portions between leaves or between leaves and mountings, e.g. ridges, notches, ripples
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/18—Leaf springs
- F16F1/185—Leaf springs characterised by shape or design of individual leaves
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- Mechanical Engineering (AREA)
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- Chemical & Material Sciences (AREA)
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- Electromagnetism (AREA)
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Abstract
本申请公开了一种应用于VCM马达的双弦丝3D折弯下弹簧片组件，由四个两两相对呈中心对称设置的下弹簧单元组成，所述下弹簧单元由一体成型且相互呈90°折弯连接的竖向弹片单元和水平弹片单元组成；所述水平弹片单元设置在靠近竖向弹片单元内侧壁一侧且两端头通过双弦丝弹片连接与竖向弹片单元形成一体结构。本申请采用双弦丝设计能够避免单弦丝结构很难达到强度和应力平衡的问题，如果宽度过宽，那么下弹簧片产生的阻力就大，而且设计应力不容调整到弹簧原材料的屈服应力下,焦距调整效果差；若将弦丝宽度设计过小，那么弹簧的弹性系数就达不到设计要求，无法满足客户需要，同时弹簧丝太小在安装和使用过程中容易发生断丝的问题。
The present application discloses a double-string 3D bent lower spring sheet assembly for VCM motors, which is composed of four lower spring units arranged in pairs and in a central symmetric manner. The lower spring unit is composed of a vertical spring sheet unit and a horizontal spring sheet unit that are integrally formed and connected to each other at 90° bends; the horizontal spring sheet unit is arranged on one side close to the inner wall of the vertical spring sheet unit, and the two ends are connected to the vertical spring sheet unit through double-string spring sheets to form an integrated structure. The double-string design adopted in the present application can avoid the problem that it is difficult to achieve strength and stress balance in a single-string structure. If the width is too wide, the resistance generated by the lower spring sheet will be large, and the design stress cannot be adjusted to the yield stress of the spring raw material, and the focal length adjustment effect is poor; if the string width is designed to be too small, the elastic coefficient of the spring will not meet the design requirements and cannot meet customer needs. At the same time, if the spring wire is too small, it is easy to break the wire during installation and use.
Description
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 motor, and particularly relates to a double-chord 3D bending lower spring piece assembly applied to the VCM motor.
Background
Voice Coil motors (Voice Coil Actuator/Voice Coil motors), also known as VCM motors, are devices that convert electrical energy to mechanical energy and achieve linear and limited-swing motion. And a device for generating regular motion by utilizing the interaction between the magnetic field from the permanent magnet steel and the magnetic pole in the magnetic field generated by the electrified coil conductor. Because the voice coil motor is a non-commutated power device. The main components are simpler, coils, springs, magnets, hall and IC devices, and some fixed structures. The springs of the voice coil motor are generally divided into upper springs and lower springs, and the main function of the springs is to enable the lens to move in the axial direction, the radial direction or the axial/radial direction simultaneously under the electromagnetic action of the coil by fixing the lens and a fixing mechanism thereof, so as to balance the electromagnetic force and limit the movement displacement of the lens.
The existing voice coil motor lower spring has a very simple structure, and the whole structure is basically consistent although the structure is designed according to different manufacturers and different general matching lenses. The inner ring spring and the outer ring spring are arranged in the same plane and are mutually connected, wherein the inner ring spring is used for connecting the lens carrier, the outer ring spring is used for being connected to the outside of the voice coil motor, the lens carrier is connected with the outside of the voice coil motor through the connection function of the springs, the function similar to suspension is realized, and as long as fine current interacts with a permanent magnet arranged on a shell of the voice coil motor through an electromagnetic coil arranged on the lens carrier to exert the function on the lens carrier, the movement of the lens is finally realized, and the functions of adjusting focal length and the like are realized.
In the prior art 1, chinese patent invention, bulletin number CN 104460180B discloses a voice coil motor for realizing optical anti-shake by open loop translation, a lower spring leaf is specifically disclosed in the specification of the patent document and the drawings of the specification, and the mode that the lower spring leaf is still arranged in an integral plane can be clearly seen by combining the text part of the specification and the drawings of the patent document. The mode is a traditional voice coil motor and is also a mainstream design mode at present, and the design method has the advantages that the structure of the lower spring can be correspondingly designed according to the weight of a lens actually matched with the voice coil motor and a fixed carrier structure thereof, the number of turns of the coil and the current design size. However, as the lens becomes larger, the thrust becomes larger, and under the condition that the design space of the VCM motor is limited, the single string wire can achieve the designed elastic coefficient by simply increasing the width of the spring, so that the stress of the spring exceeds the yield stress of the raw material of the spring, and the spring is easy to break when a life test and a mechanical test are carried out. The lower spring piece in the same plane design can only realize axial movement along the lens, namely, the focal length can not be adjusted along the radial direction of the lens, namely, the anti-shake effect is poor.
The prior art 2 is a Chinese design patent with application number 201530035691.4, the appearance discloses a lower spring piece for a voice coil motor with an inner-outer double-layer structure, the lower spring piece can be clearly seen and confirmed through a front view and a rear view and combined with a left-right view or a pitching view, the lower spring piece disclosed by the technology still adopts a plane type design, the inner spring ring and the outer spring ring are connected through four fine chord wires which are arranged in an S shape so as to realize the adjustment movement of a lens in the axial direction, meanwhile, the S shape is adopted, although the S shape is positioned on the same plane, the radial adjustment in a certain range can be realized due to the fact that the chord wires of the S shape are very tiny, but the radial adjustment in the direction is consistent with the plane in which the chord wires are positioned, the radial adjustment can be realized due to the fact that the radial adjustment is realized, the anti-shake effect can be realized, but the linear adjustment is difficult to realize due to the adjustment degree of the adjustment, the chord wire elasticity coefficient is not linear, the accurate calculation difficulty is very large, and the adjustment range is very small and the effect is not ideal. The main adjusting direction of the structure is focusing adjustment.
The analysis of the two typical prior art shows that the existing voice coil motor lower spring design is mainly designed for focal length adjustment, the anti-shake effect cannot be well considered, and meanwhile, the single-layer string wire in the same plane design has defects no matter the width. Therefore, it is particularly important and necessary to provide a new voice coil motor lower spring for solving the above technical problems, so that the existing digital lens can achieve better shooting effect.
Disclosure of Invention
In order to solve the problems that in the prior art, when a voice coil motor lower spring is used for large-lens large-pixel and large-thrust, the balance of strength and stress design is difficult to achieve by adopting a single string wire structure, if the width is too wide, the resistance generated by a lower spring piece is large, the design stress is easy to become large (even exceeds yield stress), the adjustment is difficult, the focal length adjustment effect is poor, and if the string wire width is designed to be too small, the design requirement of the elastic coefficient of the design spring cannot be met, and meanwhile, the string wire width is small, and the breakage easily occurs in the installation and use processes.
Meanwhile, the existing lower spring piece adopts the structure which is designed on the same plane, and the structural design is mainly used for adjusting the focal length along the axial movement of the lens, so that the radial adjustment of the lens is not ideal for realizing the anti-shake effect. The application provides a double-chord wire 3D bending lower spring piece component applied to a VCM motor, which structurally adopts a targeted three-dimensional design by abandoning the traditional thought of planar design, adopts planar design for axial focal length adjustment of a lens, and adopts a spring piece perpendicular to a spring chord wire for adjusting the focal length for anti-shake effect, so that independent stress of focusing and anti-shake can be realized, and focusing and anti-shake can be simultaneously considered. Furthermore, the double-chord wire design is adopted for the lower spring piece structure for focusing, so that the problems that the stress is over da Yi, the breakage occurs, the installation difficulty is high are solved, and the problem that the spring design stress is too large due to the fact that the chord wire width is too large, and the breakage during a mechanical test and a life test is not facilitated is solved.
In order to achieve the above purpose, the present application specifically provides the following technical solutions:
The utility model provides a be applied to two string silk 3D of VCM motor and bend spring leaf subassembly under, by four two relative lower spring units that are the central symmetry setting, lower spring unit comprises integrated into one piece and each other is 90 vertical shell fragment units and horizontal shell fragment unit that the connection is bent to the angle of degree, the plane that vertical spring unit was located is parallel arrangement with the focusing axis of the camera lens of VCM motor interior installation, consequently the elastic deformation direction of vertical spring unit is unanimous with the camera lens radial direction for realize the regulation of anti-shake, the same reason, horizontal shell fragment unit sets up along the radial direction of camera lens, its elastic deformation square is unanimous with the axial direction of camera lens for realize focusing. That is, the focusing and anti-shake of the lens are two directions perpendicular to each other, namely the axial direction and the radial direction of the lens, however, the invention sets the lower spring unit to a three-dimensional structure bent perpendicularly to each other, and adopts the adjustment and anti-shake of the corresponding focal lengths of the horizontal spring unit and the vertical spring unit, so that the invention has the advantage of avoiding the problem that the adjustment of the same plane structure in the prior art, which is completed at 90 degrees, causes the non-linearity of elasticity when the adjustment is performed in the direction coincident with the plane where the spring body is located, and cannot realize accurate adjustment, thereby causing the poor anti-shake effect. The meaning of the fact that the elastic force is linear means that the spring piece is in linear relation with the occurrence of deformation due to the fact that the external force is in the elastic deformation range, and therefore accurate calculation can be facilitated. If the elasticity is not changed linearly and is interfered by various factors, the accuracy is only lost by confirming the elasticity in a sample experiment mode, the operation difficulty is high, and the method has obvious negative effects on focusing and anti-shake effects.
The free end of the horizontal spring plate unit is provided with a first connecting hole for connecting a lens carrier, the free end of the vertical spring plate unit is provided with a third connecting hole for connecting a VCM motor base, one end of the horizontal spring plate unit connected with the vertical spring plate unit is provided with a second connecting hole for connecting a suspension and a support between the base and the lens carrier, one of the first connecting hole, the second connecting hole and the third connecting hole is used for positioning a structure connected with the first connecting hole, the second connecting hole and the third connecting hole so as to ensure convenience and accuracy of installation, the other is convenient for welding and electrifying, and the vertical spring plate unit and the horizontal spring plate unit not only need to play the roles of spring plate connection, lens suspension and movement, but also play the role of conducting wires for supplying power to coils arranged on the lens carrier. Of course, it should be noted that the above description of the action and principle is only for facilitating understanding of the technical effects brought by the novel structural design of the present application, not for protecting the technical effects, and the working principle of coil installation and electromagnetic action to push the lens to perform precise focusing is already known in the prior art, and is not related to the present application, and only the subtle points for further illustrating the structural design of the present application and the beneficial effects brought by anti-shake and focusing are mentioned here.
The horizontal spring plate unit is arranged on one side close to the inner side wall of the vertical spring plate unit, and two ends of the horizontal spring plate unit are connected with the vertical spring plate unit through double-string spring plates to form an integrated structure. The technical problem solved by the double-string wire elastic sheet is 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, the contradiction problem that the stress is increased due to the fact that the elastic coefficient of a spring is increased is solved, the double-string wire elastic sheet is more suitable for controlling a coil in a voice coil motor, the technical problem that the internal stress is large and is not beneficial to adjustment is solved, meanwhile, because the two string wires are stressed simultaneously, the strength is better than that of a single string wire, the reliability is better, abnormal fracture is not easy to occur, in the installation process, the self-deformation is small, the installation is facilitated, and the assembly efficiency and the axis inclination problem in the product characteristics are improved.
The vertical spring plate unit comprises a first vertical spring plate and a second vertical spring plate which are mutually and vertically connected, the free end of the first vertical spring plate is fixedly connected with the base in a positioning way through the third connecting hole, and the second vertical spring plate is fixedly connected with the horizontal spring plate unit. The first vertical elastic piece and the second vertical elastic piece are vertically connected, and the effect is that the actual adjusting direction of the corresponding vertical elastic piece 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 piece and the second vertical elastic piece which are mutually perpendicular. Secondly, the shape of a support and a base in the voice coil motor can be perfectly cut and combined, and the voice coil motor is convenient to install.
According to the preferable technical scheme, the first vertical elastic piece and the second vertical elastic piece are fixedly connected through a fold joint arranged at the connecting position. Because the first vertical elastic sheet and the second vertical elastic sheet are straight strip structures, the elastic deformation of the elastic sheet has a linear rule, and the elastic sheet has the magnitude relation between the accurate calculated deformation (namely the displacement distance value required to be regulated by anti-shake regulation) and the applied magnetic force. The purpose of setting up the fold joint is very probable reduction because of the little deformation that first vertical shell fragment and the junction of second vertical shell fragment produced to the influence of whole vertical shell fragment unit deformation linearity rule. The purpose of adopting the fold joint is also that the fold joint basically does not have any elastic deformation quantity compared with the first vertical elastic piece and the second vertical elastic piece which are straight because of large deformation curvature of the fold joint, so that the deformation quantity of the whole vertical elastic piece unit is ensured to be from the first vertical elastic piece and the second vertical elastic piece which have a linear elastic change rule.
In a further preferred aspect, the upper end surface and the lower end surface of the fold joint are alternatively provided with reinforcing sheets for increasing bending strength of the fold joint, and the reinforcing sheets are parallel to a plane where the double string wire elastic sheet is located. The reinforcing piece is arranged to strengthen the anti-deformation capability of the fold joint, and the plane where the anti-shake offset direction is located is not deformed because the reinforcing piece is arranged on the X-Y plane, namely the radial plane of the lens, so that the possibility that the fold joint deforms to influence the anti-shake is zero, and the adjustment precision of the anti-shake is improved.
Further preferably, the fold joint is an arc-shaped sheet bent at 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 deformation resistance of fold joint up and down terminal surface is even, and although the deformation resistance that the reinforcement piece played is fine, but in the time of the actual setting, based on the restriction of installation space or for the convenience of assembly, be inconvenient for all setting up the reinforcement piece at fold joint up and down terminal surface, so the fold also has very important deformation resistance, has essential meaning to the accurate calculation of anti-shake that realizes the camera lens. The number of the folds is 2-5. The number is set to account for the size of the structural dimensions of the device, preferably the size is such that the maximum radius of the corrugations is 10% -15% of the bending radius of the corrugated connector.
As a preferable technical scheme of the invention, the double-chord wire elastic sheet is specifically composed of two inner chord wires and outer chord wires which are arranged at the same plane at the same interval and/or width. The 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 application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
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 leaf spring assembly with the base;
FIG. 6 is an assembly view of the lens carrier, mount and lower spring assembly;
FIG. 7 is a schematic view of the placement of the present application in a world coordinate system.
In the figure, the lower spring piece component is 1-and the base is 2-and the support is 3-and the lens carrier is 4-;
10-lower spring units, 11-double string spring sheets, 111-inner string wires, 112-outer string wires, 12-first connecting holes and 13-second connecting holes;
the connecting device comprises a first connecting hole, a second connecting hole, a third connecting hole, a first vertical elastic piece, a second vertical elastic piece and a reinforcing piece.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following 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. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which a product of the application is conventionally put in use, it is merely for convenience of describing the present application and simplifying the description, and it is not indicated or implied that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like in the description of the present application, if any, are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance.
Furthermore, the terms "horizontal," "vertical," and the like in the description of the present application, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its 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 explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or in communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
Example 1:
The double-chord wire 3D bending lower spring piece assembly for the VCM motor is shown in the accompanying drawings 1-6 in combination with the specification, and consists of four lower spring units 10 which are arranged in a central symmetry mode in pairs, wherein each lower spring unit 10 consists of a vertical spring piece unit and a horizontal spring piece unit which are integrally formed and are connected in a 90-degree bending mode, the plane where the vertical spring unit is located is arranged in parallel with the focusing axis of a lens arranged in the VCM motor, therefore, the elastic deformation direction of the vertical spring unit is consistent with the radial direction of the lens and is used for realizing anti-shake adjustment, and the horizontal spring piece unit is arranged along the radial direction of the lens, and the elastic deformation square of the horizontal spring piece unit is consistent with the axial direction of the lens and is used for realizing focusing. That is, the focusing and anti-shake of the lens are two directions perpendicular to each other, namely the axial direction and the radial direction of the lens, however, the invention sets the lower spring unit to a three-dimensional structure bent perpendicularly to each other, and adopts the adjustment and anti-shake of the corresponding focal lengths of the horizontal spring unit and the vertical spring unit, so that the invention has the advantage of avoiding the problem that the adjustment of the same plane structure in the prior art, which is completed at 90 degrees, causes the non-linearity of elasticity when the adjustment is performed in the direction coincident with the plane where the spring body is located, and cannot realize accurate adjustment, thereby causing the poor anti-shake effect.
The free end of the horizontal spring plate unit is provided with a first connecting hole 12 for connecting the lens carrier 4, the free end of the vertical spring plate unit is provided with a third connecting hole 21 for connecting the VCM motor base 2, one end of the horizontal spring plate unit is connected with a second connecting hole 13 for connecting the suspension and the support 3 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, namely, one is used for positioning with a connected structure so as to ensure the convenience and the accuracy of installation, the other is convenient for welding and electrifying, the vertical spring plate unit and the horizontal spring plate unit not only have the function of connecting the spring plates to suspend and move the lens, but also have the function of conducting wires for supplying power to a coil arranged on the lens carrier 4. Of course, it should be noted that the above description of the action and principle is only for facilitating understanding of the technical effects brought by the novel structural design of the present application, not for protecting the technical effects, and the working principle of coil installation and electromagnetic action to push the lens to perform precise focusing is already known in the prior art, and is not related to the present application, and only the subtle points for further illustrating the structural design of the present application and the beneficial effects brought by anti-shake and focusing are mentioned here.
The horizontal spring plate unit is arranged on one side close to the inner side wall of the vertical spring plate unit, and two ends of the horizontal spring plate unit are connected with the vertical spring plate unit through the double-string spring plate 11 to form an integrated structure. The technical problem solved by the double-string wire elastic sheet 11 is 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, softer, more suitable for controlling a coil in a voice coil motor, and more beneficial to adjusting, and meanwhile, the two string wires are stressed simultaneously, so that the strength is better than that of a single fine string wire, the reliability is better, the abnormal fracture is not easy to occur, the self-deformation is small in the installation process, the installation is also more beneficial, and the assembly efficiency is improved.
The principles of focusing and anti-shake of the lens in this embodiment are as follows, and in order to better explain the superiority of the present invention, the existing adjusting principles are briefly described first. The adjustment of the focal length is realized by changing the distance between the lens and the photosensitive element, and from the motion angle analysis, the lens is in a smaller range along the axial direction through reciprocating motion so as to change the specific realization of zooming and focusing between the lens and the photosensitive element, thereby obtaining a clearer image. Similarly, the principle of anti-shake is that a lens is applied with a motion with acceleration in a direction opposite to the acceleration actually generated by the lens along the radial direction so as to counteract shake caused by external force to move the lens, so as to realize the anti-shake effect is existing. 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 through the action of a magnet arranged on the base 2 or the lens carrier 4, and the movement of the lens in the radial direction is finally driven by overcoming the elastic force generated by the lower spring assembly through electromagnetic force so as to realize anti-shake, or the lens is driven 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 connecting hole 12 is connected with the lens carrier 4, and since the horizontal spring units have four evenly distributed, the lens carrier 4 is connected with the support 3 in a suspending manner through the four double-string spring units 11, and the support 3 is connected with the position of the other section of the double-string spring unit 11 where the second connecting hole 13 is provided. Because the double-chord wire elastic sheet 11 is arranged along the X-Y plane in the radial direction, the double-chord wire elastic sheet can move along the axial direction of the lens, namely the Z axis, and the focusing is realized. It should be noted that, at this time, the lens carrier 4 and the support 3 for fixedly connecting the lens are connected by the structures of four double-string elastic pieces 11 to form a suspension structure capable of mutually moving axially.
Furthermore, the third connecting hole 21 is fixedly connected with the base 2, and then the support 3 is connected with the base 2 through four vertical spring plate units, and the vertical spring plate units are arranged along the axial Z-axis direction, so that the vertical spring plate units can move in the radial plane X-Y plane, and the anti-shake adjustment is realized. At this time, the support 3 and the base 2 are connected through four vertical spring plate units to form a suspension structure which can move in a radial plane. Under the action of no other external force, the device is relatively kept static, and when the device receives the external force in the radial direction or the axial direction, the device is correspondingly adjusted to realize the focusing or anti-shake effect. The driving force for driving the double-string elastic sheet 11 to move in the axial direction Z and the driving force for driving the vertical elastic sheet unit to move in the radial plane X-Y are derived from the electromagnetic coil, which is not different from the prior art, and is already mentioned in the background art and the description, and will not be described herein.
Example 2:
In order to better illustrate the present invention, based on the structure and principle of embodiment 1, and further combined with the content shown in fig. 1-7 of the specification, the vertical spring unit includes a first vertical spring 22 and a second vertical spring 24 that are connected vertically, where a free end of the first vertical spring 22 is fixedly connected to the base 2 through the third connection hole 21, and the second vertical spring 24 is fixedly connected to the horizontal spring unit. The first vertical elastic piece 22 and the second vertical elastic piece 24 are vertically connected, and one of the two functions is that the actual adjusting direction of the corresponding vertical elastic piece is the radial direction of the lens, namely the X-Y plane of world coordinates, and the magnetic force calculation corresponding to the electromagnetic coil for anti-shake design is more facilitated through the first vertical elastic piece 22 and the second vertical elastic piece 24 which are mutually perpendicular. Secondly, the shape of a support and a base in the voice coil motor can be perfectly cut and combined, and the voice coil motor is convenient to install.
In a preferred embodiment of the present invention, the first vertical spring 22 and the second vertical spring 24 are fixedly connected through a fold joint 23 disposed at the connection portion. Because the first vertical elastic sheet 22 and the second vertical elastic sheet 24 are both in flat strip structures, the elastic deformation is linear, and the relationship between the displacement distance value required to be adjusted for accurately calculating the deformation, namely the anti-shake adjustment, and the applied magnetic force is further provided. The purpose of the crimped joint 23 is to reduce the influence of the micro deformation generated at the connection part of the first vertical spring 22 and the second vertical spring 24 on the deformation linearity rule of the whole vertical spring unit. The purpose of adopting the fold joint 23 is also that, because the fold joint 23 has large deformation curvature due to the fold joint itself, the fold joint basically does not have any elastic deformation amount compared with the first vertical elastic piece 22 and the second vertical elastic piece 24 which are straight, so that the deformation amount of the whole vertical elastic piece unit is ensured to come from the first vertical elastic piece 22 and the second vertical elastic piece 24 which have a linear elastic change rule.
In a further preferred embodiment, the upper and lower end surfaces of the crimp connector 23 are alternatively provided with a reinforcing sheet 25 for increasing the bending strength of the crimp connector 23, and the reinforcing sheet 25 is parallel to the plane of the double string elastic sheet 11. The reinforcing sheet 25 is also arranged to strengthen the deformation resistance of the fold joint 23, and the deformation resistance of the fold joint 23 is zero because the reinforcing sheet 25 is arranged on the X-Y plane, namely the radial plane of the lens, and the plane in which the anti-shake offset direction is located is not deformed, so that the possibility that the fold joint 23 deforms to influence the anti-shake is zero, and the adjustment accuracy of the anti-shake is improved.
Further preferably, the fold joint 23 is an arc-shaped piece bent at 90 °, and a plurality of fold resistant folds are arranged on the arc-shaped piece. The purpose of setting up a plurality of folds is to guarantee that the deformation resistance ability of fold joint 23 up and down terminal surface is even, and although the deformation resistance 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 inconvenient to all set up reinforcing piece 25 at fold joint 23 up and down terminal surface, so the fold also has very important deformation resistance, has the essence to the accurate calculation of anti-shake of realization camera lens. The number of the folds is 2-5. The number of considerations is mainly the size of the construction itself, preferably the size such that the maximum radius of the corrugations is 10% -15% of the bending radius of the corrugated connector 23.
As a preferred solution of the present invention, specifically, the double-string elastic sheet 11 is composed of two inner string wires 111 and two outer string wires 112 that are disposed in the same plane at the same interval and/or width. Both free ends of the lower spring unit 10 are provided with reserved welding pieces for power-on welding. A notch for welding with silver paste is also provided near one end of the third connecting hole 21. The purpose that sets up the breach provides the prerequisite for silver thick liquid welding, both guaranteed the product circular telegram effect, also promoted the operating efficiency, reduced equipment cost, promoted the reliability of product, guaranteed the cleanliness of product, promoted product quality. The prior art generally adopts a mode that firstly, PIN foot characteristics are made on an elastic sheet, then the PIN foot is bent, and then solder paste is used for welding with the base, wherein the mode has the following defects that 1, the bending angle cannot be ensured to be 90 degrees vertically when the PIN foot characteristics on the elastic sheet are bent, the PIN foot is easy to break during welding, material waste is caused, and material cost is increased. 2, the small position of the PIN pin has high requirements on precision of a doubling and bending machine and a jig, and equipment cost is increased, 3, the problems of tin frying, rosin and the like are easy to generate when tin paste is used for welding, cleaning of products is affected, and defects or defects in the prior art can be completely avoided by adopting the mode in the embodiment.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
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| CN113389832B (en) * | 2021-07-16 | 2025-01-07 | 成都易迅光电科技有限公司 | A new type of stacked filled spring |
| CN114137686B (en) * | 2021-12-30 | 2025-03-18 | 成都易迅光电科技有限公司 | A corner reinforcement spring for a VCM motor |
| CN114810888B (en) * | 2022-05-30 | 2024-06-04 | 成都易迅吉正科技有限公司 | 3D spring structure |
| CN119828398B (en) * | 2023-10-12 | 2025-10-10 | 宁波舜宇光电信息有限公司 | Driving device and camera module |
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| CN211530988U (en) * | 2020-01-16 | 2020-09-18 | 成都易迅光电科技有限公司 | Be applied to two string silk 3D of VCM motor spring piece subassembly down of bending |
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| CN101931305B (en) * | 2009-06-25 | 2013-02-13 | 鸿富锦精密工业（深圳）有限公司 | Voice coil motor combination |
| US9341860B2 (en) * | 2012-02-21 | 2016-05-17 | Tdk Taiwan Corp. | Elastic supporting structure and optical image stabilizer having the elastic supporting structure |
| CN107763126A (en) * | 2016-08-17 | 2018-03-06 | 东莞市东坑合利美电子电器有限公司 | Elastic grillage |
| US10969561B2 (en) * | 2017-05-17 | 2021-04-06 | Tdk Taiwan Corp. | Driving mechanism |
| KR102669072B1 (en) * | 2018-04-06 | 2024-05-27 | 엘지이노텍 주식회사 | Lens driving device and camera apparatus comprising the same |
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