CN213482582U - Optical anti-shake lens driving device - Google Patents

Abstract

The utility model relates to an optical anti-shake lens driving device, including fixed part, movable part and spring element, spring element includes the last reed that sets up near the optical axis front side and sets up the lower reed near the optical axis rear side, the lower reed includes two mutually independent reed subassemblies, two reed subassemblies regard optical axis as the axle and are the rotational symmetry setting; the spring assembly comprises a first spring and a second spring, wherein first elastic parts are arranged at two ends of the first spring, a first connecting end and a second connecting end are formed at two ends of the first elastic part respectively, and the first connecting end and the second connecting end are connected with the fixed part and the movable part respectively; the second reed includes a second elastic portion, both ends of the second elastic portion form a third connecting end, and the third connecting end is connected to both the movable portion and the second connecting end. The utility model discloses can improve the anti-shake performance of camera lens, simplify the camera lens structure simultaneously, improve camera lens packaging efficiency, improve product competitiveness.

Description

Optical anti-shake lens driving device

Technical Field

The utility model relates to an optical lens drive technical field particularly, relates to optics anti-shake lens drive arrangement.

Background

With the development of technology in recent years, various mobile devices such as notebook computers, tablet computers, mobile phones, etc. are rapidly updated, and the integrated functions are more and more, and photographing has become the basic function of such mobile devices. At present, a camera lens loaded on a mobile device generally has an optical anti-shake function, wherein the optical anti-shake function is to compensate a light path of hand shake through a movable component in the lens to avoid or reduce instrument shake in the process of capturing an optical signal, so that the effect of reducing the blur of a picture is achieved, and the imaging quality is improved.

In the existing lens, a plate spring is generally arranged in front of and behind a lens support along the direction of an optical axis of the lens, the lens is suspended inside the lens through the plate spring, a plurality of suspension ring lines parallel to the optical axis are arranged between the plate springs, and the suspension ring lines can realize the displacement of the lens in the direction orthogonal to the optical axis on one hand and achieve the effect of preventing hand shock; on the other hand, the lens driving device can be electrically connected with the circuit board and the driving coil so as to drive the lens to focus.

However, in practical applications, the suspension ring wire is weak in strength and is easily broken when being impacted by a large external force, so that the optical anti-shake system fails, and the focusing system is opened at an opportunity, so that focusing is impossible. In addition, because the lens structure is complicated, the assembly process of the suspension ring line is very complicated, the overall assembly difficulty of the lens is improved, and the mass production of products and the rationalization of the price are not facilitated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an optics anti-shake lens drive arrangement can improve the anti-shake performance of camera lens, simplifies the camera lens structure simultaneously, improves camera lens packaging efficiency, improves product competitiveness.

An optical anti-shake lens driving apparatus for driving a lens defining a subject to be positioned in front of an optical axis direction of the lens, the optical anti-shake lens driving apparatus comprising: a fixing portion having an opening formed in an optical axis direction; a movable part movably arranged inside the fixed part; and a spring element connected between the fixed part and the movable part for suspending and supporting the movable part inside the fixed part; the spring element comprises an upper reed arranged close to the front side of the optical axis and a lower reed arranged close to the rear side of the optical axis, the lower reed comprises two independent reed assemblies, and the two reed assemblies are rotationally and symmetrically arranged by taking the optical axis as an axis; the spring assembly comprises a first spring and a second spring, wherein first elastic parts are arranged at two ends of the first spring, a first connecting end and a second connecting end are formed at two ends of the first elastic part respectively, and the first connecting end and the second connecting end are connected with the fixed part and the movable part respectively; the second reed includes a second elastic portion, both ends of the second elastic portion form a third connecting end, and the third connecting end is connected to both the movable portion and the second connecting end.

Furthermore, a first connecting surface is arranged between the first elastic part and the second connecting end, a second connecting surface is arranged between the second elastic part and the third connecting end, the first connecting surface and the second connecting surface are parallel to the optical axis, and the first connecting surface and the second connecting surface are located on the same plane.

Further, the movable part comprises a lens support, a driving coil sleeved on the periphery of the lens support, and a magnetic part arranged on the periphery of the lens support and opposite to the driving coil in a spaced mode.

Further, the fixed part comprises a base, a flat coil arranged on the base and a cover body connected with the base from the front of the optical axis.

Further, the second reed is electrically connected with the driving coil, the flat coil is electrically connected with the first reed through a first connecting end, and the second connecting end is electrically connected with a third connecting end.

Furthermore, a plurality of disc-shaped supporting pieces for providing damping are arranged between the movable part and the fixed part.

Furthermore, a third connecting surface is arranged at the joint of the first connecting end and the fixed part, a fourth connecting surface is arranged at the joint of the second connecting end and the movable part, and the third connecting surface is positioned at the rear side of the fourth connecting surface.

Further, the disk-shaped supporting member is attached to a surface of the fixed portion facing the movable portion or a surface of the movable portion facing the fixed portion.

Further, the first spring and the second spring are made of conductive metal.

Further, the first elastic part and the second elastic part are both in a serpentine shape.

Compared with the prior art, the beneficial effects of the utility model are that:

1. replace current rings line structure through the reed structure under the modified, can promote the reliability of camera lens structure on the one hand, on the other hand can simplify the camera lens structure, simplifies the equipment flow to reduce cost improves product competitiveness.

2. The spring assembly consists of a first spring and a second spring, and the thickness and the rigidity coefficient of the first spring and the second spring can be independently adjusted according to actual needs, so that the overall performance of the springs can be adjusted more flexibly and conveniently.

3. In order to reduce the vibrations of the lens, the prior art is usually provided with between movable part and the fixed part and inhales the shake gel, inhales and shakes the gel intensity low, and easy fracture causes the mirror head to shake, the utility model discloses set up disk type support piece between movable part and fixed part, can provide the damping for the movable part to avoid inhaling the shake-proof system that the gel fracture caused and become invalid.

4. The third connecting surface is positioned at the rear side of the fourth connecting surface, so that the movable part has a restoring force towards the rear side of the optical axis under the action of the spring assembly, and the movable part is stably contacted with the fixed part through the disc-shaped supporting piece, thereby further improving the stability of the lens.

Drawings

Fig. 1 is a schematic view of the overall structure of the optical anti-shake lens driving device of the present invention.

Fig. 2 is a schematic view of an exploded structure of the optical anti-shake lens driving device of the present invention.

Fig. 3 is a schematic view illustrating an exploded structure of a fixing portion of the optical anti-shake lens driving apparatus according to the present invention.

Fig. 4 is an exploded schematic view of a movable portion of the optical anti-shake lens driving device according to the present invention.

Fig. 5 is an exploded schematic view of a spring element of the optical anti-shake lens driving device according to the present invention.

Fig. 6 is a schematic structural diagram of a first reed of the optical anti-shake lens driving device according to the present invention.

Fig. 7 is a schematic structural diagram of a second reed of the optical anti-shake lens driving device according to the present invention.

Fig. 8 is a partially enlarged schematic view of a joint between the first reed and the second reed of the optical anti-shake lens driving device according to the present invention.

Fig. 9 is a partially enlarged schematic view of a joint between a lower spring, a fixed part and a movable part of an optical anti-shake lens driving device according to the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In this specification, for convenience of explanation, it is defined that a subject is located forward in the optical axis direction of the lens. In the following description, an end/surface located forward in the optical axis direction is referred to as a front/upper/lower surface of the member, and an end/surface located rearward in the optical axis direction is referred to as a rear/lower surface of the member.

As shown in fig. 1 and 2, the optical anti-shake lens driving apparatus 1 of the present invention can be mounted on various mobile devices such as a notebook computer, a tablet computer, and a mobile phone, and has an Auto Focusing (AF) function and an Optical Image Stabilization (OIS) function.

In a preferred embodiment, the optical anti-shake lens driving device 1 of the present invention mainly includes a fixed portion 11, a movable portion 12, and a spring element 13. The fixed portion 11 is formed with an opening in the optical axis direction, the movable portion 12 is disposed inside the fixed portion 11, the movable portion 12 can move in the direction parallel to the optical axis relative to the fixed portion 11 to adjust the focal length of the lens, and the movable portion 12 can also move in the direction perpendicular to the optical axis to compensate the optical path of the shake, thereby achieving optical anti-shake. The spring element 13 is connected between the fixed part 11 and the movable part 12, and the spring element 13 is used for suspending and supporting the movable part 12 inside the fixed part 11 and forming elastic restoring force for the movable part 12, so that the movable part 12 can be restored under the restoring force after moving in the fixed part 11.

Referring to fig. 3, the fixing portion 11 includes a base 111, a flat coil 112, and a cover 113. The cover 113 is made of a resin material and includes a square surface 113a, a circular through hole formed at a central portion of the surface for allowing light to pass therethrough, and a side plate 113b formed at a periphery of the surface and extending vertically downward to form a ring shape. The base 111 is formed in a square shape and made of a resin material, a through hole is formed in the center of the base 111, and the periphery of the base 111 is engaged with the lower end of the side plate 113 b. The flat coil 112 is disposed on the front end surface of the base 111, a plurality of pins 111a electrically connected to the flat coil 112 are disposed in the base 111, and the pins 111a extend to the lower side of the base 111 in the direction of the rear side of the optical axis.

Referring to fig. 4, the movable portion 12 includes a lens holder 121, a driving coil 122, and a magnetic member, wherein the magnetic member includes a magnet holder 123 and a plurality of permanent magnets 124 disposed in the magnet holder 123. The lens holder 121 has a substantially columnar shape, and a through hole for mounting a lens, not shown, is formed at the center thereof in the optical axis direction. The outer peripheral surface of the lens support 121 is provided with a groove 121a, and the driving coil 122 is sleeved on the outer periphery of the lens support 121 and is embedded in the groove 121 a. The magnet holder 123 is ring-shaped and is fitted around the lens holder 121, and a gap is formed between the magnet holder 123 and the lens holder 121. The permanent magnets 124 are mounted in the magnet holder 123, the permanent magnets 124 are strip-shaped plate-like magnets, the number of which is four, and are provided in the magnet holder 123 so as to surround the lens holder 121, and the magnetic pole surfaces of the permanent magnets 124 are opposed to the driving coils 122 with a space therebetween. The permanent magnet 124 makes the driving coil 122 in the magnetic field, when the driving coil 124 is energized, the driving coil 124 will generate a lorentz force along the optical axis direction of the lens, so as to drive the lens support 121 to move to a predetermined position, thereby realizing the focusing of the lens.

Referring to fig. 5 to 8, the spring element 13 includes an upper spring 131 disposed near the front side of the optical axis and a lower spring 132 disposed near the rear side of the optical axis. When the movable part 12 is moved in the optical axis direction by the lorentz force, the spring element 13 exerts a restoring force on the movable part 12, and the movable part 12 is moved to a position where the lorentz force and the restoring force of the spring element 13 are balanced.

The upper spring 131 is a substantially square plate spring including a substantially square first frame 131a that matches the contour of the front end face of the movable section 12 and a substantially circular second frame 131b that matches the through hole of the movable section 12, and a plurality of serpentine elastic strings 131c are provided between the first frame 131a and the second frame 131 b.

The lower reed 132 includes two independent reed assemblies 133 which are not in contact with each other, the two reed assemblies 133 are disposed in rotational symmetry with the optical axis as an axis, and each reed assembly 133 includes a first reed 134 and a second reed 135.

Referring to fig. 6, the first spring 134 includes a bar 134a having a long strip shape, two ends of the bar 134a are provided with first elastic portions 134b, the first elastic portions 134b are elastic chords having a serpentine shape, two ends of the first elastic portions 134b are respectively formed as first connection ends 134c and second connection ends 134d, and the first connection ends 134c and the second connection ends 134d are respectively connected with the fixed portion 11 and the movable portion 12.

Referring to fig. 7, the second spring 135 includes a second elastic portion 135a, the second elastic portion 135a is a winding string having elasticity, a support portion 135b having a semicircular shape is formed in the middle of the second elastic portion 135a and matches with the through hole of the movable portion 12, both ends of the second elastic portion 135a are formed as third connection ends 135c, and the third connection ends 135c are connected to the movable portion 12 and the second connection ends 134 d.

Compare in the monolithic structure of prior art lower reed, the utility model discloses a lower reed 132 comprises two reed assemblies 133, and reed assembly 133 comprises first reed 134 and second reed 135 two parts, and the thickness and the rigidity coefficient of first reed 134 and second reed 135 can independently be adjusted according to actual need, and it is more nimble, more convenient to make the regulation of lower reed 132 wholeness ability.

Referring to fig. 8, a first connection surface a1 is disposed between the first elastic portion 134B and the second connection end 134d, a second connection surface B1 is disposed between the second elastic portion 135a and the third connection end 135c, the first connection surface a1 and the second connection surface B1 are parallel to the optical axis, and the first connection surface a1 and the second connection surface B1 are overlapped. By disposing the first connecting surface a1 and the second connecting surface B1 on the same plane, the first elastic portion 134B and the second elastic portion 135a can be connected conveniently, and the chord between them can be easily designed.

It should be noted that, the first reed 134 and the second reed 135 are made of conductive metal, the second reed 135 is electrically connected to the driving coil 124, the flat coil 112 is electrically connected to the first reed 134 through the first connection end 134c, and the second connection end 134b is electrically connected to the third connection end 135c, so as to connect the driving coil 124 to the flat coil 112, and there is no need to further set a suspension loop wire. It should be understood that, in implementation, the electrical connection between the second spring 135 and the driving coil 124, and between the flat coil 112 and the first connection end 134c can be achieved through an electrical conductor or a wire, and the electrical connection between the second connection end 134b and the third connection end 135c can be achieved through soldering.

Referring to fig. 2 again, a plurality of disc-shaped supporting members 14 are disposed between the movable portion 12 and the fixed portion 11, the disc-shaped supporting members 14 are made of deformable rubber, and when the movable portion 12 contacts the fixed portion 11, the disc-shaped supporting members 14 can provide damping therebetween, thereby preventing the movable portion 12 from vibrating and improving the optical anti-shake effect. Compared with the existing structure adopting shock-absorbing gel, the disc-shaped support piece 14 has higher strength, can not break, can avoid the failure of the anti-shake system caused by the breakage of the shock-absorbing gel, and improves the stability of the lens structure.

In a specific implementation, the disc-shaped supporting member 14 may be attached to a front end surface of the flat coil 112 facing the movable portion 12, a rear end surface of the magnet holder 123 facing the fixed portion 11, or another surface between the movable portion 12 and the fixed portion 11, which is not limited herein.

Referring to fig. 9, as a preferred embodiment, the connection position of the first connection end 134c and the fixed portion 11 has a third connection surface a2, the connection position of the second connection end 134d and the third connection end 135c and the movable portion 12 has a fourth connection surface B2, and the third connection surface a2 is located at the rear side of the fourth connection surface B2.

The third connecting surface a2 is located at the rear side of the fourth connecting surface B2 in the optical axis direction, so that the movable part 12 has a restoring force toward the rear side of the optical axis under the action of the spring assembly 133, and the movable part 12 is stably contacted with the fixed part 11 through the disc-shaped supporting member 14, further increasing the stability of the lens.

In the above embodiments, the magnetic member is provided in the movable portion and moves with the movable portion. It is understood that in other embodiments, the magnetic member may be disposed on the fixed portion, which does not move with the movable portion, as long as the magnetic member forms a magnetic field for driving the driving coil 124 to move.

In the above embodiment, the lens driving device is substantially square as a whole when viewed from the front of the optical axis, and the lens holder and the magnet holder are also square, and four square plate magnets are correspondingly used. It will be appreciated that in other embodiments, the lens holder and the magnet holder may be circular or of other regular shapes, and correspondingly, a number of 4 or 6 or 8 arc-shaped or trapezoidal or triangular magnets may be used.

In other embodiments, the lens driving device may be an optical anti-shake driving device, and the fixing portion may be a magnet fixing bracket for fixing the magnetic component. The lens driving device further includes a yoke covering front and outer peripheral sides of the movable portion and the fixed portion from a front side in the optical axis direction, a base connecting the yoke from a rear side in the optical axis direction, and a linear spring suspending and supporting the fixed portion on the base. The fixing portion extends out of the edge portion of the lens support to form a plurality of fixing tables, and the first connecting portion is fixed to the fixing tables of the fixing portion. The effects are similar to those of the above embodiments, and are not described again.

In the description of the present invention, it is to be understood that the terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.

Claims (10)

1. An optical anti-shake lens driving apparatus for driving a lens defining a subject to be positioned in front of an optical axis direction of the lens, the optical anti-shake lens driving apparatus comprising:

a fixing portion having an opening formed in an optical axis direction;

a movable part movably arranged inside the fixed part; and

a spring element connected between the fixed part and the movable part for supporting the movable part suspension inside the fixed part, the spring element including an upper spring disposed near a front side of the optical axis and a lower spring disposed near a rear side of the optical axis;

the lower reed is characterized by comprising two independent reed assemblies, wherein the two reed assemblies are rotationally and symmetrically arranged by taking an optical axis as an axis; the spring assembly comprises a first spring and a second spring, wherein first elastic parts are arranged at two ends of the first spring, a first connecting end and a second connecting end are formed at two ends of the first elastic part respectively, and the first connecting end and the second connecting end are connected with the fixed part and the movable part respectively; the second reed includes a second elastic portion, both ends of the second elastic portion form a third connecting end, and the third connecting end is connected to both the movable portion and the second connecting end.

2. The optical anti-shake lens driving apparatus according to claim 1, wherein a first connecting surface is disposed between the first elastic portion and the second connecting end, a second connecting surface is disposed between the second elastic portion and the third connecting end, the first connecting surface and the second connecting surface are parallel to the optical axis, and the first connecting surface and the second connecting surface are located on the same plane.

3. The optical anti-shake lens driving device according to claim 1, wherein the movable portion includes a lens holder, a driving coil fitted around an outer periphery of the lens holder, and a magnetic member provided on the outer periphery of the lens holder and facing the driving coil with a space therebetween.

4. The optical anti-shake lens driving apparatus according to claim 3, wherein the fixing portion includes a base, a flat coil provided on the base, and a cover connected to the base from the front of the optical axis.

5. The optical anti-shake lens driving device according to claim 4, wherein the second spring is electrically connected to the driving coil, the plate coil is electrically connected to the first spring through a first connection terminal, and the second connection terminal is electrically connected to a third connection terminal.

6. The optical anti-shake lens driving device according to claim 1, wherein a plurality of disc-shaped supports for providing damping are provided between the movable part and the fixed part.

7. The optical anti-shake lens driving apparatus according to claim 6, wherein the first connecting end and the fixed part have a third connecting surface, the second and third connecting ends and the movable part have a fourth connecting surface, and the third connecting surface is located on a rear side of the fourth connecting surface.

8. The optical anti-shake lens driving device according to claim 6, wherein the disk-shaped support is attached to a surface of the fixed portion on the side facing the movable portion or a surface of the movable portion on the side facing the fixed portion.

9. The optical anti-shake lens driving apparatus according to any one of claims 1 to 8, wherein the first spring and the second spring are made of a conductive metal.

10. The optical anti-shake lens driving device according to any one of claims 1 to 8, wherein the first and second elastic portions each have a meandering shape.

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