CN115079485A - Lens driving device - Google Patents
Lens driving device Download PDFInfo
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- CN115079485A CN115079485A CN202210850900.XA CN202210850900A CN115079485A CN 115079485 A CN115079485 A CN 115079485A CN 202210850900 A CN202210850900 A CN 202210850900A CN 115079485 A CN115079485 A CN 115079485A
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- elastic
- supporting frame
- elastic bending
- damping
- fixing
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
- G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- Adjustment Of Camera Lenses (AREA)
Abstract
The present invention provides a lens driving device, including: a base; a support frame; a lens barrel holder and an elastic component; the elastic assembly comprises a first fixing arm, a second fixing arm and a plurality of elastic arms connected with the first fixing arm and the second fixing arm; each elastic arm comprises a first elastic bending part and a plurality of second elastic bending parts; the radius of curvature of the first resilient curved portion is greater than the radius of curvature of the second resilient curved portion; the lens driving device further comprises a plurality of damping rubbers, and each damping rubber is arranged between the first elastic bending part and the supporting frame; the surface of the supporting frame corresponding to the first elastic bending portion along the optical axis direction protrudes towards the first elastic bending portion to form a fixed structure for fixing damping glue, the first elastic bending portion and the fixed structure are fixedly connected through the damping glue, and at least part of the damping glue is coated on the first elastic bending portion. Compared with the related art, the lens driving device has the advantages of good anti-shake effect and low production cost.
Description
[ technical field ] A method for producing a semiconductor device
The present disclosure relates to driving devices, and particularly to a lens driving device.
[ background of the invention ]
With the development of imaging technology, lens driving devices have been widely used in various imaging devices. The combination of a lens driving device with various portable electronic devices such as a mobile phone, a video camera, a computer, etc. is more popular among consumers.
The driving mechanism of the lens driving device in the related art is usually a driving structure formed by assembling a coil and magnetic steel, a supporting frame is supported on a base, the driving coil and the driving magnetic steel are respectively fixed on a lens cone bracket and the supporting frame, and the lens cone bracket is supported on the supporting frame through an upper elastic sheet; the OIS coil (anti-shake coil) is fixed on the shell and positioned above the supporting frame, the anti-shake magnetic steel is fixed on one side of the supporting frame, which is far away from the base, and damping glue is added between the supporting frame and the lens cone bracket for the anti-shake function of the lens cone. When the driving coil applies current, the driving coil and the driving magnetic steel generate an electromagnetic field, and the driving coil is subjected to the action of Lorentz force of the electromagnetic field to drive the driving magnetic steel to move linearly along the optical axis direction of the lens cone, so that the lens cone is driven to move along the optical axis direction; when the current was applyed to the anti-shake coil, the anti-shake coil produced the electromagnetic field with the anti-shake magnet steel, and the anti-shake coil received the effect of the lorentz power of electromagnetic field, and this anti-shake magnet steel of drive is followed the motion of perpendicular to optical axis direction, utilizes the effect of damping gum buffering to drive the lens cone and realize OIS anti-shake performance.
However, in the lens driving device of the related art, since the damping paste is added between the lens barrel holder and the support frame, there are risks that the position of the paste amount is difficult to control, the paste amount is unstable due to the influence of the stroke, and the reliability fails. The damping glue is positioned in a gap between the support frame and the lens cone bracket and is in a suspended position, the up-and-down movement stroke is larger in the normal focusing work or falling process of the lens cone in the lens cone bracket, the position form of the damping glue is dragged along with the movement of the lens cone bracket, and the risk of fracture or displacement is generated; and when the clearance between the supporting frame and the lens cone bracket has deviation, the glue amount and consistency are poor, and the production cost is increased.
Therefore, it is necessary to provide a new lens driving apparatus to solve the above problems.
[ summary of the invention ]
The invention aims to provide a lens driving device which is small in size, simple to assemble, good in stability and capable of reducing production cost.
In order to solve the above technical problem, the present invention provides a lens driving device, including:
a base;
the supporting frame is provided with an accommodating space and is supported on the base;
the lens cone bracket is accommodated in the accommodating space and is used for installing a lens cone with an optical axis;
the elastic components are fixed on two opposite sides of the supporting frame along the optical axis direction to elastically support the lens cone bracket in the accommodating space; it is characterized in that the preparation method is characterized in that,
the elastic assembly comprises a first fixing arm fixed on the support frame, a second fixing arm fixed on the lens barrel support and a plurality of elastic arms connected with the first fixing arm and the second fixing arm, and the elastic arms are arranged at intervals with the support frame along the optical axis direction; each elastic arm comprises a first elastic bending part and a plurality of second elastic bending parts, wherein the first elastic bending part is bent and extended towards the direction close to the lens barrel support by the first fixing arm, and the second elastic bending parts are bent and extended towards the direction close to the lens barrel support by the first elastic bending part and connected to the second fixing arm; a radius of curvature of the first resilient curved portion is greater than a radius of curvature of the second resilient curved portion;
the lens driving device further comprises a plurality of damping rubbers, and each damping rubber is arranged between the first elastic bending part and the supporting frame; the surface of the supporting frame corresponding to the first elastic bending part along the optical axis direction protrudes towards the first elastic bending part to form a fixing structure for fixing the damping glue, the first elastic bending part is fixedly connected with the fixing structure through the damping glue, and the damping glue at least partially covers the first elastic bending part.
Preferably, the elastic assembly comprises an upper elastic sheet fixed on one side of the supporting frame far away from the base and a lower elastic sheet fixed on one side of the supporting frame close to the base; the damping glue is arranged between the upper elastic sheet and the supporting frame.
Preferably, the support frame is rectangular, the fixing structures comprise four fixing structures which are respectively located at four corners of the support frame, the upper elastic sheet comprises two elastic arms which are arranged oppositely at intervals, each elastic arm comprises two elastic arms which are arranged at intervals, and the four elastic bending portions are respectively in one-to-one correspondence with the four fixing structures.
Preferably, braced frame includes certainly braced frame orientation the surface of bullet arm is followed optical axis direction to keeping away from the sunken formation of bullet arm and with the main part plastic face that the bullet arm interval set up, fixed knot constructs including by the main part plastic face is close to a lateral direction of bullet arm the bellying that the bullet arm protrusion extended, the bellying with first elastic bending portion just sets up just to the interval the damping is glued in on the bellying.
Preferably, the bulge part is of an annular structure, and the damping rubber part is filled in an annular area of the bulge part.
Preferably, the fixed knot constructs still include by the main part plastic face is kept away from the sunken gluey groove that forms of elastic component direction, glue the groove and be located the within range that the bellying encloses, damping glue at least part set up in glue the inslot.
Preferably, the inner diameter of the protruding part gradually increases from one end close to the glue groove to one end far away from the glue groove.
Preferably, the damping rubber completely covers the first elastic bending part.
Preferably, the lens driving device further includes a housing covering the base and enclosing with the base to form an accommodation space, and a suspension wire movably supporting the support frame in the accommodation space, wherein one end of the suspension wire is connected to the base, and the other end of the suspension wire is connected to the elastic component.
Preferably, the lens driving device further comprises an anti-shake coil fixed on the base, a magnetic steel fixed on the support frame and spaced from the anti-shake coil, and an auto-focusing coil fixed on the lens barrel support and spaced from the magnetic steel, wherein the anti-shake coil interacts with the magnetic steel and drives the support frame to move in a direction perpendicular to the optical axis; the automatic focusing coil and the magnetic steel interact to drive the lens cone bracket to move along the direction of the optical axis.
Compared with the prior art, in the lens driving device, each elastic arm comprises a first elastic bending part which is bent and extended towards the direction close to the lens cone bracket by the first fixed arm and a plurality of second elastic bending parts which are bent and extended towards the direction close to the lens cone by the first elastic bending part and connected to the second fixed arm; the curvature radius of the first elastic bending parts is larger than that of the second elastic bending parts, and each first elastic bending part is correspondingly arranged above one of the fixed structures and forms a gap with the corresponding fixed structure; the lens driving device further comprises a plurality of damping rubbers, and each damping rubber is arranged between the first elastic bending part and the supporting frame; the supporting frame protrudes towards the first elastic bending part along the surface of the optical axis direction corresponding to the first elastic bending part to form a fixing structure for fixing the damping glue, the first elastic bending part is fixedly connected with the fixing structure through the damping glue, and the damping glue at least partially covers the first elastic bending part. In the structure, the lens cone moves up and down for a larger stroke in the normal focusing work or falling process, but the position of the damping glue is located on one side of the elastic sheet close to the support frame along the optical axis direction, the up-and-down movement amount of the first elastic bending part of the elastic component is smaller, and the damping glue is not in a large pulling state generated by the conventional scheme, so that the lens cone is more stable. When taking place X/Y direction anti-shake work or X/Y direction and fall, lens cone support and braced frame take place to become relatively nearly or become far away, and the damping glue is because not between the two, therefore receives the influence degree very little, and only big curvature flexion takes place slight movement, and lens cone support form is more stable, and the anti-shake effect is better, simultaneously can also great degree the reduction in production cost.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
fig. 1 is a schematic perspective view of a lens driving device according to the present invention;
FIG. 2 is a schematic diagram of a partially exploded view of a lens driving apparatus according to the present invention;
FIG. 3 is a schematic view of an overall exploded structure of the lens driving apparatus according to the present invention;
FIG. 4 is a sectional view taken along line A-A of FIG. 1;
FIG. 5 is a sectional view taken along line B-B of FIG. 1;
FIG. 6 is a partial enlarged view of C of FIG. 5;
FIG. 7 is a schematic view of a portion of the construction of the elastomeric component of the present invention;
FIG. 8 is a schematic structural view of a support frame of the present invention;
FIG. 9 is a diagram of frequency response of a lens driving device according to the present invention;
fig. 10 is a frequency response characteristic diagram of a lens driving device according to the prior art.
[ detailed description ] embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.
Referring to fig. 1 to 10, a lens driving apparatus 100 is provided, which includes: a base 1; a supporting frame 2, a lens barrel support 4, an elastic component 5 and a flexible circuit board 11.
The supporting frame 2 has an accommodating space 13, and the supporting frame 2 is supported by the base 1.
The housing 3 is covered on the base 1 such that the support frame 2 is located within the housing 3.
The lens barrel support 4 is accommodated in the accommodating space 13 and used for installing a lens group.
The elastic assembly 5 includes a first fixing arm 51 fixed to the support frame 2, a second fixing arm 54 fixed to the lens barrel holder 4, and a plurality of elastic arms 14 connecting the first fixing arm 51 and the second fixing arm 54, and the elastic arms 14 are spaced from the support frame 2 along the optical axis direction. The first fixing arm 51 is fixed to the support frame 2, the second fixing arm 54 is fixed to the tip of the lens barrel holder 4, and the lens barrel holder 4 is elastically supported in the accommodation space 13 by connecting the lens barrel holder 4 and the support frame 2 by the elasticity of the plurality of elastic arms 14. In this embodiment, each elastic arm 14 includes a first elastic bending portion 52 bent and extended from the first fixing arm 51 toward the lens barrel holder 4, and a plurality of second elastic bending portions 53 bent and extended from the first elastic bending portion 52 toward the lens barrel holder 4 and connected to the second fixing arm 54; the radius of curvature of the first elastic curved portion 52 is larger than the radius of curvature of the second elastic curved portion 53. The first elastic bending portion 52 is disposed close to the supporting frame 2, and the first elastic bending portion 52 is mainly used for the lens barrel holder 4 to twist or launch when the supporting frame 2 is in a relative translation state, so as to bear a main deformation effect. The plurality of second elastic bending portions 53 are provided near the lens barrel holder 4, and the second elastic bending portions 53 are mainly used for balancing performance design and stress action without bearing deformation. Therefore, under the action of the elastic component 5, the lens barrel holder 4 is matched with the first elastic bending part 52 and the plurality of second elastic bending parts 53 for use, so that the lens barrel holder 4 is prevented from twisting or translating, and the anti-shake performance of the lens driving device 100 is improved.
The lens driving device 100 further includes a plurality of damping rubbers 12, and each damping rubber 12 is respectively disposed between the first elastic bending portion 52 and the supporting frame 2; the surface of the supporting frame 2 corresponding to the first elastic bending portion 52 along the optical axis direction protrudes toward the first elastic bending portion 52 to form a fixing structure 21 for fixing the damping adhesive 12, the first elastic bending portion 52 and the fixing structure 21 are fixedly connected through the damping adhesive 12, wherein the damping adhesive 12 at least partially covers the first elastic bending portion 52. In the normal focusing or falling process of the lens cone bracket 4, the up-down movement stroke is large, but the position of the damping rubber 12 is located at one side of the elastic sheet close to the support frame 2 along the optical axis direction, the up-down movement amount of the first elastic bending part 52 of the elastic component 5 is small, and the damping rubber 12 is not in a large pulling state generated by the conventional scheme, so that the stability is higher. When taking place X/Y direction anti-shake work or X/Y direction and fall, lens cone support 4 and braced frame 2 take place to become relatively nearly or become far away, and damping glue 12 is because not between the two, therefore receives the influence degree very little, and only big curvature flexion takes place slight movement, and lens cone support 4 form is more stable, and the anti-shake effect is better, simultaneously can also great degree the reduction in production cost.
Each of the first elastic bending portions 52 is correspondingly disposed above one of the fixing structures 21 and forms a gap with the corresponding fixing structure 21.
In this embodiment, the elastic component 5 includes an upper elastic sheet 15 fixed to a side of the supporting frame 2 away from the base 1 and a lower elastic sheet 6 fixed to a side of the supporting frame 2 close to the base 1; the damping rubber 12 is arranged between the upper spring plate 15/the lower spring plate 6 and the supporting frame 2.
One end of the upper elastic sheet 15 is fixed to the top end of the supporting frame 2 along the optical axis direction of the lens barrel support 4, and the other end of the upper elastic sheet 15 is fixed to the top end of the lens barrel support 4 along the optical axis direction, so that the lens barrel support 4 is elastically suspended in the accommodating space 13. In this embodiment, the upper elastic sheet 15 is provided with a conductive path for realizing the transmission of the electrical signal. For example, the upper elastic sheet 15 is an FPC, and the conductive path is implemented by a conductive circuit on the FPC.
One end of the lower elastic sheet 6 is fixed at the bottom end of the support frame 2 along the optical axis direction, and the other end of the lower elastic sheet 6 is fixed at the bottom end of the lens cone bracket 4 along the optical axis direction; the upper elastic sheet 15 and the lower elastic sheet 6 together elastically support the lens barrel support 4 in the accommodating space 13. For providing a restoring force to the lens barrel holder 4 at the time of an Automatic Focusing (AF) function.
In this embodiment, the lens driving device 100 further includes a housing 3 covering the base 1 and enclosing with the base 1 to form an accommodating space, and a suspension wire 7 movably supporting the supporting frame 2 in the accommodating space, wherein one end of the suspension wire 7 is connected to the base 1, and the other end is connected to the elastic component 5. The suspension wires 7 comprise 4 wires which are uniformly distributed at the positions of four corners of the supporting frame 2 and are used for movably suspending the supporting frame in a space enclosed by the shell and the base.
In this embodiment, the lens driving device 100 further includes an anti-shake coil 9 fixed on the base 1, a magnetic steel 10 fixed on the supporting frame 2 and spaced from the anti-shake coil 9, and an auto-focus coil 8 fixed on the lens barrel holder 4 and spaced from the magnetic steel 10, where the anti-shake coil 9 interacts with the magnetic steel 10 and drives the supporting frame 2 to move in a direction perpendicular to the optical axis; the automatic focusing coil 8 interacts with the magnetic steel 10 to drive the lens barrel support 4 to move along the optical axis direction.
The lens cone support 4, the upper spring plate 15, the lower spring plate 6, the suspension wire 7, the automatic focusing coil 8, the anti-shake coil 9, the magnetic steel 10 and the flexible circuit board 11 are all accommodated in the housing 3.
The suspension wires 7 are made of metal conductive materials, each suspension wire 7 comprises a plurality of wires which are arranged around the supporting frame 2 at intervals, one end of each suspension wire 7 is fixed on the base 1, and the other end of each suspension wire 7 is fixed on the upper elastic sheet 15 and forms electric connection. The suspension wires 7 serve to provide restoring force to the support frame 2 when the anti-shake function is provided.
The anti-shake coil 9 is fixed on the base 1, the magnetic steel 10 is fixed on one side of the supporting frame 2 close to the lens cone support 4, and the anti-shake coil 9 is located in the magnetic field range of the magnetic steel 10 and drives the magnetic steel 10 to move in the direction perpendicular to the optical axis.
The magnetic steel 10 comprises first driving magnetic steels 101 which are respectively fixed on two opposite sides of the supporting frame 2 and second driving magnetic steels 102 which are fixed on two other opposite sides of the supporting frame 2 along the direction perpendicular to the optical axis, and each magnetic steel 10 is a single pole magnetizing. The two opposite sides of the magnetic steel 10 are provided with a single magnetic pole.
The automatic focusing coil 8 is fixed on the periphery of the lens cone support 4 in a sleeved mode and is spaced from the magnetic steel 10, the automatic focusing coil 8 is electrically connected with the upper elastic sheet 15, and the magnetizing direction of the magnetic steel 10 is parallel to the winding plane of the automatic focusing coil 8 and drives the automatic focusing coil 8 to move along the optical axis direction (Z axis direction). The lens cone support 4 is driven by the automatic focusing coil 8 to move along the optical axis direction, so that the Automatic Focusing (AF) function can be realized. In this embodiment, the magnetizing direction of the magnetic steel 10 is parallel to the winding plane of the auto-focusing coil 8.
Of course, the magnetizing direction of each magnetic steel can be perpendicular to the optical axis direction.
The anti-shake coil 9 comprises a first anti-shake coil 91 fixed on the base 1 and opposite to the first driving magnetic steel 101 at intervals in a direction parallel to the optical axis, and a second anti-shake coil 92 fixed on the base 1 and opposite to the second driving magnetic steel 102 at intervals in a direction parallel to the optical axis, wherein the first anti-shake coil 91 is located in the magnetic field range of the first driving magnetic steel 101 and drives the first driving magnetic steel 101 to move in a first direction perpendicular to the optical axis; the second anti-shake coil 92 is located within the magnetic field range of the second driving magnetic steel 102 and drives the second driving magnetic steel 102 to move along a second direction perpendicular to the optical axis direction; the first direction and the second direction are perpendicular to each other, and in this embodiment, the first direction is defined as an X-axis direction, and the second direction is defined as a Y-axis direction. That is, the first anti-shake coil 91 and the second anti-shake coil 92 are disposed on the supporting frame 2 along the radial space of the lens barrel holder 4, and the anti-shake coil 9 does not occupy the space of the lens driving device 100 along the optical axis (Z-axis direction) due to the structural arrangement, so that the thickness of the lens driving device 100 along the optical axis direction is effectively reduced, the thinning requirement of the product is facilitated, the assembling mode is simplified, and the assembling efficiency is improved.
The anti-shake coil 9 is formed by pre-winding, and a plane where the winding direction of the anti-shake coil 9 is located is perpendicular to the optical axis direction. The anti-shake drive mode that this structure formed compares in the anti-shake drive mode of multilayer circuit board 11 structure among the prior art, and its cost can reduce by a wide margin.
In the present embodiment, the flexible wiring board 11 is electrically connected to the autofocus coil 8 and the anti-shake coil 9, respectively.
The flexible circuit board 11 is further provided with a pin 111 portion, and the pin 111 portion is convenient for connecting an external signal line.
The supporting frame 2 further comprises a first mounting groove 23 and a second mounting groove 24 which are formed by recessing two opposite sides of the supporting frame 2 away from the lens barrel support 4, the first driving magnetic steel 101 is arranged in the first mounting groove 23 in a matching manner, and the second driving magnetic steel 102 is arranged in the second mounting groove 24 in a matching manner. The supporting frame 2 is used for supporting and fixing the upper elastic sheet 15 and the lower elastic sheet 6, and the first mounting groove 23 and the second mounting groove 24 are used for mounting the first driving magnetic steel 101 and the second driving magnetic steel 102 respectively, so that the first driving magnetic steel 101 and the second driving magnetic steel 102 save mounting space in the lens driving device 100, and the structure of the lens driving device 100 is integrally miniaturized.
In this embodiment, the supporting frame 2 is rectangular, the fixing structure 21 includes four and is located at four corners of the supporting frame 2, the upper elastic sheet 15 includes two elastic arms 14, and the two elastic arms are spaced from each other and are opposite to each other. The four first elastic bending portions 52 correspond to the four fixing structures 21 one to one. Therefore, the upper elastic sheet 15 is conveniently fixed on the fixing structure 21 through the matching of the damping glue 12, the fixing effect of the lens cone support 4 is improved, and the lens cone support 4 is more stable.
In this embodiment, the two upper elastic pieces 15 are insulated from each other and form a ring shape together, and each upper elastic piece 15 forms a conductive path; so as to realize the transmission of the positive pole and the negative pole of the electric signal. In this embodiment, the two upper elastic pieces 15 are arranged in a central symmetry with respect to the lens barrel holder 4. Of course, the two upper spring pieces 15 may also be of a unitary structure, and only two conductive paths need to be insulated from each other, which is easy to think.
In this embodiment, the support frame 2 includes certainly the support frame 2 orientation the surface of bullet arm 14 is followed optical axis direction is to keeping away from the sunken formation of bullet arm 14 and with the main part plastic surface 22 that the interval of bullet arm 14 set up, fixed knot constructs 21 include by main part plastic surface 22 is close to a lateral direction of bullet arm 14 the protruding bellying 211 of extending of bullet arm 14, bellying 211 with first elastic bending 52 just sets up just to the interval damping glue 12 laminate in on the bellying 211. The damping glue 12 is fixedly attached to the main plastic surface 22, so that the support frame 2 is fixedly connected with the upper elastic sheet 15 of the elastic assembly 5. A fixing structure 21 for storing damping glue 12 is arranged at a position corresponding to the supporting frame 2, a certain gap is reserved in the height direction between the fixing structure and the upper elastic sheet 15 for connecting the damping glue 12, and the upper elastic sheet 15 is ensured not to interfere with the supporting frame 2 when the mechanism moves; the periphery of the position of the damping rubber 12 of the supporting frame 2 is provided with a convex part 211 higher than the main plastic surface 22, and has a height difference with a peripheral structure, so that the damping rubber 12 is ensured to be in a shape, and the damping rubber can not slide along an external plane during extrusion and is more stable.
Optionally, the protrusion 211 is of an annular structure, and the damping rubber 12 is partially filled in an annular region of the protrusion 211. The protruding portion 211 includes an overall ring shape, an annular shape opened on the overall ring shape, and an annular shape surrounded by a plurality of protruding portions at intervals.
In this embodiment, the fixing structure 21 further includes a glue groove 212 formed by the main plastic surface 22 being recessed away from the elastic component 5, the glue groove 212 is located in a range surrounded by the protruding portion 211, and the damping glue 12 is at least partially disposed in the glue groove 212. Through set up gluey groove 212 in main part plastic face 22 to in gluey inslot 212 pour into damping glue 12, can increase the fixed effect of damping glue 12 and braced frame 2. Preferably, the main body plastic surface 22 is recessed in a direction away from the upper elastic piece 15 to form the glue groove 212.
Specifically, the inner diameter of the protrusion 211 gradually increases from the end close to the glue groove 212 to the end far from the glue groove 212. The fixing area between the damping rubber 12 and the fixing structure 21 is increased conveniently, and the fixing effect is good.
In this embodiment, the glue groove 212 is circular or square. The round and square shapes are convenient, the stress is stable, and the fixing effect is good.
Of course, the glue groove 212 is not limited to the specific shape (circular or square, etc.) described above, and may be triangular, parallelogram, etc. It is within the scope of the present invention to provide the opening on the plastic groove 212 as long as there is a height difference between the plastic surface 22 of the main body and the protrusion 211.
In this embodiment, the damping rubber 12 completely covers the first elastic bending portion 52. The fixing effect between the first elastic bending part 52 and the supporting frame 2 is good, the elastic effect of the upper elastic sheet 15 is better, and the anti-shaking effect is better. Optionally, the damping rubber 12 at least partially covers the main body or the whole of the first elastic bending portion 52, so that a better fixing effect is achieved and the cost can be saved.
In this embodiment, the lower spring 6 includes a third fixing arm 61 fixed to the lower portion of the support frame 2, a fourth fixing arm 63 for fixing the bottom end of the lens barrel holder 4, a third elastic bending portion 62 connecting the third fixing arm 61 and the fourth fixing arm 63, and a fixing ring 64 fixed to the end of the fourth fixing arm 63, and the fourth fixing arm 63 is fixedly connected to the bottom end of the lens barrel holder 4. The support stability of the lens cone bracket is improved.
In this embodiment, the fixing ring 64 has a circular structure.
In the present embodiment, as shown in fig. 9 to 10, the lens driving apparatus 100 can effectively achieve the objective of the OIS motor frequency response characteristic through practical verification: the resonance point amplitude peak is obviously inhibited within 1KHz, and the closed-loop debugging requirement and the anti-shaking effect are met.
Compared with the prior art, each elastic arm comprises a first elastic bending part which is bent and extended towards the direction close to the lens cone bracket by the first fixed arm and a plurality of second elastic bending parts which are bent and extended towards the direction close to the lens cone by the first elastic bending part and connected to the second fixed arm; the curvature radius of the first elastic bending parts is larger than that of the second elastic bending parts, and each first elastic bending part is correspondingly arranged above one of the fixed structures and forms a gap with the corresponding fixed structure; the lens driving device further comprises a plurality of damping rubbers, and each damping rubber is arranged between the first elastic bending part and the supporting frame; the supporting frame protrudes towards the first elastic bending part along the surface of the optical axis direction corresponding to the first elastic bending part to form a fixing structure for fixing the damping glue, the first elastic bending part is fixedly connected with the fixing structure through the damping glue, and the damping glue at least partially covers the first elastic bending part. In the structure, the lens cone moves up and down for a larger stroke in the normal focusing work or falling process, but the position of the damping glue is located on one side of the elastic sheet close to the support frame along the optical axis direction, the up-and-down movement amount of the first elastic bending part of the elastic component is smaller, and the damping glue is not in a large pulling state generated by the conventional scheme, so that the lens cone is more stable. When taking place X/Y direction anti-shake work or X/Y direction and fall, lens cone support and braced frame take place to become relatively nearly or become far away, and the damping glue is because not between the two, therefore receives the influence degree very little, and only big curvature flexion takes place slight movement, and lens cone support form is more stable, and the anti-shake effect is better, simultaneously can also great degree the reduction in production cost.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (10)
1. A lens driving device, comprising:
a base;
the supporting frame is provided with an accommodating space and is supported on the base;
the lens cone bracket is accommodated in the accommodating space and is used for installing a lens cone with an optical axis;
the elastic components are fixed on two opposite sides of the supporting frame along the optical axis direction to elastically support the lens cone bracket in the accommodating space; it is characterized in that the preparation method is characterized in that,
the elastic assembly comprises a first fixing arm fixed on the support frame, a second fixing arm fixed on the lens barrel support and a plurality of elastic arms connected with the first fixing arm and the second fixing arm, and the elastic arms are arranged at intervals with the support frame along the optical axis direction; each elastic arm comprises a first elastic bending part and a plurality of second elastic bending parts, wherein the first elastic bending part is bent and extended towards the direction close to the lens barrel support by the first fixing arm, and the second elastic bending parts are bent and extended towards the direction close to the lens barrel support by the first elastic bending part and connected to the second fixing arm; a radius of curvature of the first resilient curved portion is greater than a radius of curvature of the second resilient curved portion;
the lens driving device further comprises a plurality of damping rubbers, and each damping rubber is arranged between the first elastic bending part and the supporting frame; the supporting frame protrudes towards the first elastic bending part along the surface of the optical axis direction corresponding to the first elastic bending part to form a fixing structure for fixing the damping glue, the first elastic bending part is fixedly connected with the fixing structure through the damping glue, and the damping glue at least partially covers the first elastic bending part.
2. The lens driving apparatus according to claim 1, wherein the elastic member includes an upper elastic piece fixed to a side of the supporting frame away from the base and a lower elastic piece fixed to a side of the supporting frame close to the base; the damping glue is arranged between the upper elastic sheet and the supporting frame.
3. The lens driving device as claimed in claim 2, wherein the supporting frame is rectangular, the fixing structures include four fixing structures respectively located at four corners of the supporting frame, the upper resilient plate includes two upper resilient plates disposed opposite to each other at intervals, each upper resilient plate includes two resilient arms spaced apart from each other, and the four first resilient bending portions respectively correspond to the four fixing structures one to one.
4. The lens driving apparatus as claimed in claim 1, wherein the supporting frame includes a main body plastic surface recessed from a surface of the supporting frame facing the elastic arm in the optical axis direction and spaced apart from the elastic arm, the fixing structure includes a protrusion protruding from a side of the main body plastic surface close to the elastic arm toward the elastic arm, the protrusion is spaced apart from the first elastic bending portion, and the damping adhesive is attached to the protrusion.
5. The lens driving device as claimed in claim 4, wherein the protrusion has a ring structure, and the damping rubber is partially filled in the ring region of the protrusion.
6. The lens driving apparatus as claimed in claim 5, wherein the fixing structure further includes a glue groove formed by recessing the main body plastic surface away from the elastic component, the glue groove is located within a range surrounded by the protruding portion, and the damping glue is at least partially disposed in the glue groove.
7. The lens driving device according to claim 6, wherein an inner diameter of the boss portion gradually increases from an end close to the glue groove to an end far from the glue groove.
8. The lens driving apparatus according to claim 1, wherein the damping paste entirely covers the first elastic bending portion.
9. The lens driving device according to claim 1, further comprising a housing covering the base and enclosing an accommodation space with the base, and a suspension movably supporting the supporting frame in the accommodation space, wherein one end of the suspension is connected to the base, and the other end of the suspension is connected to the elastic member.
10. The lens driving device according to claim 1, further comprising an anti-shake coil fixed to the base, a magnetic steel fixed to the supporting frame and spaced opposite to the anti-shake coil, and an auto-focus coil fixed to the lens barrel holder and spaced apart from the magnetic steel, wherein the anti-shake coil interacts with the magnetic steel and drives the supporting frame to move in a direction perpendicular to the optical axis; the automatic focusing coil and the magnetic steel interact to drive the lens cone bracket to move along the direction of the optical axis.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210850900.XA CN115079485A (en) | 2022-07-19 | 2022-07-19 | Lens driving device |
| PCT/CN2022/118140 WO2024016448A1 (en) | 2022-07-19 | 2022-09-09 | Lens driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210850900.XA CN115079485A (en) | 2022-07-19 | 2022-07-19 | Lens driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115079485A true CN115079485A (en) | 2022-09-20 |
Family
ID=83259651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210850900.XA Pending CN115079485A (en) | 2022-07-19 | 2022-07-19 | Lens driving device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115079485A (en) |
| WO (1) | WO2024016448A1 (en) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100845333B1 (en) * | 2005-07-11 | 2008-07-10 | 주식회사 모비너스 | Plate Spring for Auto-focus actuator of Miniature Optical Lens |
| JP5004579B2 (en) * | 2006-12-28 | 2012-08-22 | 日本電産サンキョー株式会社 | Lens drive device |
| JP6669677B2 (en) * | 2014-07-03 | 2020-03-18 | エルジー イノテック カンパニー リミテッド | Lens drive |
| US9791713B2 (en) * | 2014-07-24 | 2017-10-17 | Lg Innotek Co., Ltd. | Lens moving apparatus |
| CN112114467B (en) * | 2015-01-20 | 2022-06-14 | Lg伊诺特有限公司 | Lens driving device, camera module and optical apparatus |
| CN113341525B (en) * | 2016-01-11 | 2023-10-27 | Lg伊诺特有限公司 | Lens driving device, camera module and optical device |
| CN114114482B (en) * | 2016-05-09 | 2024-04-09 | Lg伊诺特有限公司 | Lens driving device, camera module and optical device |
| JP6723629B2 (en) * | 2016-09-16 | 2020-07-15 | アルプスアルパイン株式会社 | Lens driving device and camera module using the lens driving device |
| WO2019039804A1 (en) * | 2017-08-23 | 2019-02-28 | 엘지이노텍(주) | Lens driving device, camera module comprising same, and optical apparatus |
| US11555978B2 (en) * | 2018-07-05 | 2023-01-17 | Mcnex Co., Ltd. | Camera module with optical image stabilization function |
| CN114174886A (en) * | 2019-08-02 | 2022-03-11 | Lg 伊诺特有限公司 | Lens driving apparatus, and camera module and optical device including the same |
-
2022
- 2022-07-19 CN CN202210850900.XA patent/CN115079485A/en active Pending
- 2022-09-09 WO PCT/CN2022/118140 patent/WO2024016448A1/en unknown
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| Publication number | Publication date |
|---|---|
| WO2024016448A1 (en) | 2024-01-25 |
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Address after: 530031 plant of powder injection workshop, No. 100 Gaoling Road, Nanning City, Guangxi Zhuang Autonomous Region Applicant after: AAC Optics (Nanning) Technologies Co.,Ltd. Address before: Factory of powder injection workshop, No. 100 Gaoling Road, Nanning City, Guangxi Zhuang Autonomous Region, 530000 Applicant before: Chengrui optics (Nanning) Co.,Ltd. |