CN216979403U

CN216979403U - Lens driving device

Info

Publication number: CN216979403U
Application number: CN202220212298.2U
Authority: CN
Inventors: 闫锋; 韦锁和
Original assignee: Changzhou Ruitai Photoelectric Co Ltd
Current assignee: Changzhou Ruitai Photoelectric Co Ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-07-15
Anticipated expiration: 2032-01-25

Abstract

The lens driving device comprises a shell which is provided with an accommodating space and is composed of a shell body and a base, a lens module, a driving component for driving the lens module to move, a first supporting frame for accommodating and fixing the lens module, a second supporting frame sleeved on the first supporting frame and a first spring part for connecting the first supporting frame and the second supporting frame, wherein the first spring part comprises a first spring part and a second spring part which are integrally formed; the second spring part with first spring part integrated into one piece supports lens module, first braced frame and second braced frame and removes for the base and realize the anti-shake effect, and the use of integrative spring part has reduced assembly process's the degree of difficulty and has promoted the equipment precision when having reduced manufacturing cost, effectively promotes the yield, has effectively reduced the fracture risk when falling, has promoted anti-falling performance and reliability.

Description

Lens driving device

[ technical field ] A method for producing a semiconductor device

The present disclosure relates to driving devices, and particularly to a lens driving device for a portable electronic device.

[ background of the utility model ]

With the development of imaging technology, lens driving devices have been widely used in various imaging devices. In addition to portable cameras, portable terminals like smart phones and tablet computers are also equipped with high-performance lens driving devices. A high-performance lens driving apparatus provided in a portable terminal generally has an auto-focusing (AF) function and an Optical Image Stabilization (OIS) function. The optical anti-shake function (OIS) can reduce shaking of a picture due to external vibration or shaking of a user's hand.

A lens driving device having an auto-focusing function (AF) and an optical anti-shake function (OIS) in the related art generally includes a housing, a lens module, an AF bracket, an OIS bracket, a driving coil, an anti-shake coil, magnetic steel, and an AF spring piece, and an OIS supporting member is required to be disposed to drive a lens assembly to move in a direction perpendicular to an optical axis, and a common OIS supporting member is a suspension wire, a shape memory alloy wire, etc., and is various in parts and inconvenient to mount, and the anti-shake coil occupies a certain space in the housing, which limits the size of the lens driving device.

However, in the lens driving device of the related art, the number of components is large, the assembly process is complex, and the yield is affected; in the related art, the OIS supporting component of the lens driving device is generally in a linear structure, the risk of breakage is high when the OIS supporting component falls, the falling resistance performance is poor, the reliability of the OIS supporting component is influenced, the assembly precision of the OIS supporting component is difficult to control during assembly, and the product consistency is not high.

Therefore, it is desirable to provide an improved lens driving apparatus to solve the above problems.

[ Utility model ] content

In view of the above problems, the present invention provides a lens driving apparatus.

Specifically, the scheme provided by the utility model is as follows:

a lens driving device, comprising:

the shell comprises a base and a shell body which is fixed with the base and encloses to form an accommodating space;

the lens module comprises a lens and a lens barrel for accommodating the lens;

the first support frame is supported on the base, and the lens cone is accommodated and fixed in the first support frame;

the second supporting frame is sleeved on the first supporting frame and arranged at intervals with the first supporting frame;

a first spring member including a first spring portion and a second spring portion that are integrally formed, the first spring portion connecting the first support frame and the second support frame to support the first support frame to move relative to the second support frame in the optical axis direction, the second spring portion connecting the second support frame and the base to support the second support frame and the first support frame to move relative to the base in the direction perpendicular to the optical axis direction; and

the driving assembly drives the first supporting frame and/or the second supporting frame to move relative to the base;

the first spring part comprises a first fixing part fixed on the first support frame, a second fixing part fixed on the second support frame and a first elastic part connecting the first fixing part and the second fixing part; the second spring portion comprises a third fixing portion connected with the second fixing portion, a fourth fixing portion connected with the base and a second elastic portion connected with the third fixing portion and the fourth fixing portion, and the second elastic portion faces towards the base along the direction of the optical axis from the third fixing portion and fixedly connected with the fourth fixing portion.

Preferably, the second elastic part comprises at least two extension arms arranged along the optical axis direction at intervals and a connecting arm connecting the two adjacent extension arms, and any two adjacent extension arms are equal to each other along the optical axis direction.

Preferably, the connecting arms are U-shaped or V-shaped, and the opening directions of two adjacent connecting arms are opposite.

Preferably, the connecting arm is linear, and the connecting arm is perpendicular to the extension arm.

Preferably, the base includes the orientation the loading face of camera lens, with the bottom surface that the loading face set up relatively and be connected the side surface of loading face and bottom surface, be equipped with on the base certainly the loading face to the sunken fixed slot that forms of bottom surface, the fixed slot include the tank bottom surface and with the tank side face that the tank bottom surface is connected, the fourth fixed part is fixed in the tank side face.

Preferably, the second elastic part further comprises an upper connecting arm connected with the third fixing part and a lower connecting arm connected with the fourth connecting part, the upper connecting arm is connected with one end of the extension arm adjacent to the upper connecting arm, and the lower connecting arm is connected with one end of the extension arm adjacent to the lower connecting arm.

Preferably, be equipped with on the base certainly the groove side is from keeping away from the sunken gluey groove of holding that forms of side surface, it glues to hold to be equipped with the damping in the gluey inslot, the damping glue with lower linking arm butt.

Preferably, the base comprises a fixing column formed by protruding outwards from the side surface of the groove, and a fixing hole fixedly matched with the fixing column is formed in the fourth fixing portion.

Preferably, the base includes from the groove lateral surface is to the fixed boss of evagination formation, be equipped with the joint groove of sunken formation in the optical axis direction on the fixed boss, the fourth fixed part card is located the joint groove.

Preferably, a cross section of the third fixing portion in a width direction thereof is arc-shaped.

Preferably, the first spring part is fixed on the end of the first support frame far away from the base, the lens driving device further comprises a second spring part connected with the first support frame and the second support frame, and the second spring part comprises a fifth fixing part fixed on one side of the first support frame facing the base, a sixth fixing part fixed on one side of the second support frame facing the base, and a third elastic part connecting the fifth fixing part and the sixth fixing part.

Preferably, the driving assembly comprises a focusing coil fixed on the first support frame, a driving magnetic steel fixed on the second support frame and arranged corresponding to the focusing coil, and an anti-shake coil fixed on the base and arranged corresponding to the driving magnetic steel; the lens driving device further comprises a flexible circuit board and a metal insert, wherein the flexible circuit board and the metal insert are fixed on the base, the anti-shake coil is electrically connected with the outside through the flexible circuit board, the focusing coil is electrically connected with the first fixing portion, and the fourth fixing portion is electrically connected with the metal insert.

The lens driving device structure comprises a shell which is provided with an accommodating space and is composed of a shell body and a base, a lens module used for shooting, a driving component used for driving the lens module to move, a first supporting frame used for accommodating and fixing the lens module, a second supporting frame sleeved on the first supporting frame and a first spring part used for connecting the first supporting frame and the second supporting frame, wherein the first spring part comprises a first spring part and a second spring part which are integrally formed, the first spring part is connected with the first supporting frame and the second supporting frame to enable the first supporting frame to move relative to the second supporting frame along the optical axis direction, the second spring part is connected with the second supporting frame and the base to enable the second supporting frame and the first supporting frame to move relative to the base along the direction vertical to the optical axis, and the lens module is supported by the second spring part which is integrally formed with the first spring part, The first supporting frame and the second supporting frame move relative to the base to achieve an anti-shaking effect, and due to the use of the integrated spring piece, the production cost is reduced, the difficulty of an assembly process is reduced, the assembly precision is improved, and the yield is effectively improved; second spring portion certainly the third fixed part is followed the optical axis direction orientation the base extend to with fourth fixed part fixed connection has effectively reduced the fracture risk when falling, has promoted the anti performance and the reliability of falling of product.

[ description of the drawings ]

Fig. 1 is a perspective view of a lens driving apparatus according to the present invention;

fig. 2 is an exploded view of the lens driving apparatus of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a partial perspective view of the lens driving device according to the present invention;

FIG. 5 is an enlarged view of portion B of FIG. 4;

FIG. 6 is a perspective view of a partial structure of a lens driving apparatus according to the present invention;

FIG. 7 is a perspective view of a first spring member of the lens driving device according to the present invention;

FIG. 8 is a perspective view of a lens driving device according to another embodiment of the present invention;

fig. 9 is an enlarged view of a portion C in fig. 8.

[ 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.

As shown in fig. 1 to 9, the present invention provides a lens driving device 100, the lens driving device 100 includes a housing 1 having an accommodating space 10, a lens module 2, a first supporting frame 3, a second supporting frame 4, a first spring member 5, a second spring member 6, and a driving assembly 7. The housing 1 includes a base 11 and a housing 12 fixed to the base 11 and enclosing to form an accommodating space 10, and the lens module 2, the first support frame 3, the second support frame 4, the first spring element 5, the second spring element 6 and the driving element 7 are all accommodated in the accommodating space 10.

As shown in fig. 1 to 3, the lens module 2 includes a lens for taking a picture and a lens barrel 21 accommodating the lens; the first supporting frame 3 is supported on the base 11 and is arranged at intervals with the base 11, the first supporting frame 3 is a hollow annular structure, and the lens cone 21 is arranged in the first supporting frame 3 and fixed on the first supporting frame 3; the second supporting frame 4 is sleeved outside the first supporting frame 3 and spaced from the first supporting frame 3, and correspondingly, the second supporting frame 4 is also in an annular structure.

The first spring member 5 includes a first spring portion 51 and a second spring portion 52 which are integrally formed; specifically, the first spring portion 51 connects the first support frame 3 and the second support frame 4, so that the first support frame 3 carries the lens module 2 to move relative to the second support frame 4 along the optical axis direction; the second spring portion 52 connects the second support frame 4 and the chassis 11 so that the second support frame 4 and the first support frame 3 carry the lens module 2 to move in a direction perpendicular to the optical axis relative to the chassis 11.

As shown in fig. 1-6, the driving assembly 7 is used to drive the first support frame 3 and/or the second support frame 4 to move relative to the base. Specifically, the driving assembly 7 includes a focusing coil 71 fixed to the first support frame 3, a driving magnetic steel 72 fixed to the second support frame 4 and disposed corresponding to the focusing coil 71, and an anti-shake coil 73 fixed to the base 11 and disposed corresponding to the driving magnetic steel 72; in the present embodiment, the focus coil 71 is wound outside the first support frame 3, i.e., on the surface facing the second support frame 4. The driving magnetic steel 72 is fixed on the surface of the second support frame 4 facing the first support frame 3. In this embodiment, the number of the driving magnetic steels 72 is four. It can be understood that the lens driving device 100 of the present invention has a rectangular shape, and therefore, the base 11, the first supporting frame 3, the second supporting frame 4 and the casing 12 have rectangular shapes, and therefore, the four driving magnetic steels 72 are respectively fixed to the four sides of the second supporting frame 4. Correspondingly, the number of the anti-shake coils 73 is four, and the four anti-shake coils 73 are fixed on the base 11 and correspond to the four driving magnetic steels 72 one by one. Specifically, the lens driving device 100 further includes a flexible circuit board 8 fixed to the base 11 and a metal insert 9, the anti-shake coil 73 is electrically connected to the outside through the flexible circuit board 8, and the second spring portion 52 is electrically connected to the metal insert 9.

As shown in fig. 2 to 7, in particular, the first spring part 51 includes a first fixing part 511 fixed to the first support frame 3, a second fixing part 512 fixed to the second support frame 4, and a first elastic part 513 connecting the first fixing part 511 and the second fixing part 512; the second spring portion 52 includes a third fixing portion 521 connected to the second fixing portion 512, a fourth fixing portion 522 connected to the base 11, and a second elastic portion 523 connecting the third fixing portion 521 and the fourth fixing portion 522. It can be understood that, since the first spring portion 51 and the second spring portion 52 are integrally formed, the second fixing portion 512 and the third fixing portion 521 are integrally formed. The second spring portion 52 can be regarded as being formed by bending and extending the second fixing portion 512 of the first spring portion 51 toward the base 11. The second elastic portion 523 extends from the third fixing portion 521 toward the base 11 along the optical axis direction to be fixedly connected to the fourth fixing portion 522.

The operation principle of the lens driving device 100 will be briefly described below.

When the lens of the lens driving device 100 moves along the optical axis direction, since the focusing coil 71 is connected to the first fixing portion 511 of the first spring portion 51, the fourth fixing portion 522 of the second spring portion 52 is electrically connected to the metal insert 9, and the metal insert 9 is communicated with an external circuit, the power of the focusing coil 71 is realized through the conductive paths of the metal insert 9, the second spring portion 52, and the first spring portion 51, and at this time, under the support of the first elastic portion 513 of the first spring portion 51, the first support frame 3 drives the lens module 2 to move relative to the base 11 and the second support frame 4 along the optical axis direction, so as to realize the focusing function of the lens module 2.

When the lens of the lens driving apparatus 100 moves along the direction perpendicular to the optical axis, the anti-shake coil 73 is electrically connected to an external circuit through the flexible circuit board 8, and the anti-shake coil 73 is energized, and at this time, the second supporting frame 4 and the first supporting frame 3 drive the lens module 2 to move along the direction perpendicular to the optical axis under the support of the second elastic portion 523 of the second spring portion 52, so as to achieve the anti-shake effect of the lens module 2.

In order to better support the first support frame 3 and the second support frame 4 and avoid the risk of breaking due to the first elastic part 513 of the first spring part 51 bearing too much load, the lens driving device 100 further comprises a second spring part 6, and the second spring part 6 connects the first support frame 3 and the second support frame 4; the second spring element 6 is fixed to one end of the first support frame 3 facing the base 11 along the optical axis, and specifically, the second spring element 6 includes a fifth fixing portion 61 fixed to an end surface of the first support frame 3 facing the base 11, a sixth fixing portion 62 fixed to an end surface of the second support frame 4 facing the base 11, and a third elastic portion 63 connecting the fifth fixing portion 61 and the sixth fixing portion 62. Correspondingly, the first fixing portion 511 of the first spring portion 51 is fixed to the end surface of the first support frame 3 away from the base 11 in the optical axis direction, and the second fixing portion 512 is fixed to the end surface of the second support frame 4 away from the base 11 in the optical axis direction.

In the present invention, since the first support frame 3, the second support frame 4 and the lens module 2 are all supported above the base 11 by the second spring portion 52, in order to make the second spring portion 52 have stronger reliability, specifically, the second elastic portion 523 includes a connecting arm 5233 connecting the upper connecting arm 5231 with the third fixing portion 521, at least two extending arms 5232 arranged at intervals along the optical axis direction connecting two adjacent extending arms 5232, and a lower connecting arm 5234 connecting the fourth fixing portion 522; the extension arm 5232 closest to the upper connecting arm has one end connected to the upper connecting arm 5231 and the other end connected to its adjacent connecting arm 5233, and the extension arm 5232 closest to the lower connecting arm 5234 has one end connected to the lower connecting arm 5234 and the other end connected to its adjacent connecting arm 5233. As can be seen, the upper connection arm 5231 extends from the third fixing portion 521 toward the base 11 in the optical axis direction, and the lower connection arm 5234 extends in a direction parallel to the upper connection arm 5231. Further, the intervals of any two adjacent extension arms 5232 in the optical axis direction are equal; preferably, the extension arm 5232 extends in a direction perpendicular to the optical axis direction. In this embodiment, the connecting arm 5233 is U-shaped, in other embodiments, the connecting arm 5233 may also be V-shaped, and the opening directions of two adjacent connecting arms 5233 are opposite, so that the second elastic portion 523 forms a zigzag wave-shaped structure, and the second spring portion 52 can be buffered by using the deformation of the second elastic portion 523 when falling, thereby effectively reducing the risk of fracture, and improving the reliability of the lens driving device 100. In other embodiments, the connecting arm 5233 can also be straight, in which case the extending direction of the connecting arm 5233 is perpendicular to the extending direction of the extending wall 5232.

The base 11 includes a bearing surface 111 facing the lens, a bottom surface 112 opposite to the bearing surface 111, and a side surface 113 connecting the bearing surface 111 and the bottom surface 112, the base 11 is provided with a fixing groove 114 formed by recessing from the bearing surface 111 to the bottom surface 112, wherein the fixing groove 114 includes a groove bottom surface 114 parallel to the bearing surface 111 and a groove side surface 1142 connected to the groove bottom surface 114, and the fourth fixing portion 522 of the second spring portion 52 is fixed to the groove side surface 1142. In order to reduce the risk of fracture of the lower connecting arm 5234 of the second spring portion 52, the base 11 is provided with a glue containing groove 115 formed by inwards recessing the groove side surface 1142, and damping glue is arranged in the glue containing groove 115, so that the lower connecting arm 5234 abuts against the damping glue, the reliability of the second spring portion 52 is effectively improved, and the risk of fracture of the spring element is further reduced. In this embodiment, in order to stably fix the fourth fixing portion 522 on the base 11, the base 11 further includes a fixing post 116 protruding outward from the groove side 1142, and correspondingly, a fixing hole 5221 matched with the fixing post 116 is formed on the fourth fixing portion 522. As shown in fig. 8-9, in another embodiment, the base 11 includes a fixing protrusion 117 protruding outward from the groove side 1142, a locking groove 1171 recessed along the optical axis direction is formed on the fixing protrusion 117, and the fourth fixing portion 522 is locked in the locking groove 1171. Further, still be equipped with the injecting glue groove 1172 that communicates with joint groove 1171 on this fixed boss 117, beat through injecting glue groove 1172 and glue for fourth fixed part 522 is more firm is fixed in base 11.

In the present embodiment, the fixing grooves 114 are disposed at four corner positions of the base 11, wherein the groove side 1142 forms an angle of 45 degrees with the side surface 113 of the base 11, and in other embodiments, the groove side 1142 may be parallel to one of the side edges of the base 11. In addition, in order to avoid noise generated by the collision of the third fixing portion 521 of the second spring portion 52 with the second support frame 4 and to affect reliability, the third fixing portion 521 is provided in a non-flat plate-like structure, and preferably, the cross section of the third fixing portion 521 in the width direction thereof is arc-shaped. It can be understood that the extending direction of the third fixing portion 521 is parallel to the fourth fixing portion 522.

The lens driving device structure comprises a shell which is provided with an accommodating space and is composed of a shell body and a base, a lens module used for shooting, a driving component used for driving the lens module to move, a first supporting frame used for accommodating and fixing the lens module, a second supporting frame sleeved on the first supporting frame and a first spring part used for connecting the first supporting frame and the second supporting frame, wherein the first spring part comprises a first spring part and a second spring part which are integrally formed, the first spring part is connected with the first supporting frame and the second supporting frame to enable the first supporting frame to move relative to the second supporting frame along the optical axis direction, the second spring part is connected with the second supporting frame and the base to enable the second supporting frame and the first supporting frame to move relative to the base along the direction vertical to the optical axis, and the lens module is supported by the second spring part which is integrally formed with the first spring part, The first supporting frame and the second supporting frame move relative to the base to achieve an anti-shaking effect, and the use of the integrated spring part reduces the production cost, reduces the difficulty of an assembly process, improves the assembly precision and effectively improves the yield; second spring portion certainly the third fixed part is followed the optical axis direction orientation the base extend to with fourth fixed part fixed connection has effectively reduced the fracture risk when falling, has promoted anti falling performance and reliability.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the utility model.

Claims

1. A lens driving device, characterized by comprising:

the lens module comprises a lens and a lens barrel for accommodating the lens;

the first support frame is supported on the base, and the lens barrel is accommodated and fixed in the first support frame;

2. The lens driving apparatus as claimed in claim 1, wherein the second elastic portion includes at least two extending arms spaced apart from each other in the optical axis direction and a connecting arm connecting two adjacent extending arms, and a distance between any two adjacent extending arms in the optical axis direction is equal.

3. A lens driving apparatus according to claim 2, wherein the connecting arms are U-shaped or V-shaped, and the opening directions of two adjacent connecting arms are opposite.

4. The lens driving apparatus as claimed in claim 2, wherein the connecting arm is linear, and the connecting arm is perpendicular to the extending arm.

5. The lens driving apparatus according to claim 2, wherein the base includes a bearing surface facing the lens, a bottom surface disposed opposite to the bearing surface, and a side surface connecting the bearing surface and the bottom surface, the base is provided with a fixing groove formed by recessing the bearing surface toward the bottom surface, the fixing groove includes a groove bottom surface and a groove side surface connected to the groove bottom surface, and the fourth fixing portion is fixed to the groove side surface.

6. The lens driving apparatus as claimed in claim 5, wherein the second elastic portion further includes an upper connecting arm connected to the third fixing portion and a lower connecting arm connected to a fourth connecting portion, the upper connecting arm being connected to one end of the extension arm adjacent thereto, and the lower connecting arm being connected to one end of the extension arm adjacent thereto.

7. The lens driving device according to claim 6, wherein a glue containing groove is formed in the base by recessing from the groove side surface away from the side surface, and damping glue is provided in the glue containing groove and abuts against the lower connecting arm.

8. The lens driving apparatus as claimed in claim 5, wherein the base includes a fixing post formed to protrude outward from the groove side surface, and the fourth fixing portion is provided with a fixing hole fixedly engaged with the fixing post.

9. The lens driving device as claimed in claim 5, wherein the base includes a fixing boss protruding outward from the side of the groove, the fixing boss is provided with a locking groove recessed along the optical axis, and the fourth fixing portion is locked in the locking groove.

10. The lens driving device according to claim 1, wherein a cross section of the third fixing portion in a width direction thereof is arc-shaped.

11. A lens driving apparatus according to claim 1, wherein said first spring member is fixed to an end of said first support frame away from said base, said lens driving apparatus further comprising a second spring member connecting said first support frame and said second support frame, said second spring member including a fifth fixing portion fixed to a base-facing side of said first support frame, a sixth fixing portion fixed to a base-facing side of said second support frame, and a third elastic portion connecting said fifth fixing portion and said sixth fixing portion.

12. The lens driving apparatus according to claim 1, wherein the driving assembly includes a focusing coil fixed to the first supporting frame, a driving magnetic steel fixed to the second supporting frame and disposed corresponding to the focusing coil, and an anti-shake coil fixed to the base and disposed corresponding to the driving magnetic steel; the lens driving device further comprises a flexible circuit board and a metal insert, wherein the flexible circuit board and the metal insert are fixed on the base, the anti-shake coil is electrically connected with the outside through the flexible circuit board, the focusing coil is electrically connected with the first fixing portion, and the fourth fixing portion is electrically connected with the metal insert.