WO2022000540A1 - Lens module - Google Patents

Abstract

Disclosed is a lens module, comprising a housing having a containing cavity, a lens suspended in the containing cavity, a first fixing block fixed on the lens in a surrounding manner, a second fixing block spaced from the first fixing block and fixed on the housing, and a piezoelectric driving device arranged between the first fixing block and the second fixing block, wherein the piezoelectric driving device is arranged on the periphery of the lens in a surrounding manner to drive the lens to make a deflection motion. According to the lens module provided in the present utility model, the piezoelectric driving device can drive the lens to deflect so as to realize an anti-shake function, such that the position of the lens can be conveniently adjusted in all directions without additionally arranging a fulcrum structure; the piezoelectric driving device is very rapid in terms of response, such that the operation experience of a user is greatly improved; and moreover, the piezoelectric driving device can be made to be very thin, such that the occupied space of the piezoelectric driving device is small, and miniaturization of the lens module is facilitated.

Description

lens module

【Technical field】

The utility model relates to the technical field of lens optical imaging, in particular to a lens module.

【Background technique】

In recent years, high-performance lens modules have been installed on electronic products such as smartphones, tablet computers, and cameras. When taking a photo, if the lens module shakes, the captured photo will be blurred. In order to ensure the quality of the captured image, the lens module usually has an anti-shake function.

In the existing anti-shake solution, the drive coil and the magnetic steel are usually installed on the side of the lens, and the position of the lens is adjusted by the lateral thrust, so as to realize the anti-shake function of the lens module. However, the response of the electromagnetic drive method is relatively slow, and the electromagnetic push device is installed on the side, which requires a fulcrum structure at the bottom to easily adjust the angle of the camera, thus affecting the user's operating experience and the product performance of the lens module, which does not satisfy the lens module. Features of quick response.

Therefore, it is necessary to provide an improved lens module to solve the above problems.

【Content of utility model】

The purpose of the present invention is to provide a lens module, which has the advantages of quick response and convenient and omnidirectional adjustment of the position of the camera head without the need for a bottom fulcrum structure.

The purpose of this utility model adopts following technical scheme to realize:

A lens module, comprising a casing with an accommodation cavity, a lens suspended in the accommodation cavity, a first fixing block arranged around the lens and fixed to the lens, spaced from the first fixing block and fixed to the lens. The second fixing block of the casing, and the piezoelectric driving device arranged between the first fixing block and the second fixing block, the piezoelectric driving device is arranged around the lens to drive the The lens makes a yaw motion.

As an improvement, the extension direction of the piezoelectric driving device is perpendicular to the optical axis of the lens.

As an improvement, the first fixing block, the piezoelectric driving device and the second fixing block are spaced and distributed in parallel along the optical axis direction of the lens.

As an improvement, the lens module further includes a third fixing block extending from the first fixing block and fixed on one surface of the piezoelectric driving device, and a third fixing block extending from the second fixing block and being fixed on one surface of the piezoelectric driving device. A fourth fixing block fixed on the other surface of the piezoelectric driving device.

As an improvement, the third fixing block is fixed on one end of the piezoelectric driving device, and the fourth fixing block is fixed on the other end of the piezoelectric driving device.

As an improvement, the piezoelectric driving device includes a first piezoelectric sheet and a second piezoelectric sheet that are arranged in layers, and the third fixing block is fixed to the second piezoelectric sheet facing the first fixing block. On one side, the fourth fixing block is fixed on the side of the first piezoelectric sheet facing the second fixing block.

As an improvement, the third fixing block and the first fixing block are integrally formed or separately assembled; and/or,

The fourth fixing block and the second fixing block are integrally formed or separately assembled.

As an improvement, a plurality of piezoelectric driving devices are provided, and the plurality of piezoelectric driving devices are evenly distributed along the circumferential direction of the lens.

As an improvement, the casing includes a side plate and a first cover plate and a second cover plate respectively connected to opposite sides of the side plate, the first cover plate, the side plate and the second cover The accommodating cavity is formed by enclosing the board, the first cover plate is provided with a light-through hole communicating with the accommodating cavity and facing the lens, and the piezoelectric driving device is located on the side of the lens and the lens. between the boards.

As an improvement, the lens module further includes an elastic support member connected between the lens and the inner wall of the receiving cavity, the elastic support member includes an inner frame fixed around the lens, An outer frame outside the inner frame and spaced from the inner frame, and a flexible connecting beam connected between the inner frame and the outer frame, the outer frame is fixedly connected to the outer casing.

As an improvement, one end of the flexible connecting beam is connected to the outer frame, and the other end extends to the inner frame along an arc-shaped track.

Compared with the prior art, the embodiment of the present invention provides a first fixing block that is fixedly connected to the lens and a second fixing block that is fixedly connected to the housing, and a piezoelectric element is connected between the first fixing block and the second fixing block. Driving device, when the piezoelectric driving device is supplied with voltages of different polarities, the piezoelectric driving device will deform, and then drive the lens to perform yaw motion, so as to compensate for the displacement of the lens due to shaking, and realize the lens module. Anti-shake function to ensure shooting quality. Since there is a piezoelectric drive device that can realize the anti-shake function of the lens module, there is no need to set an additional fulcrum structure to adjust the position of the lens in a convenient and all-round way, and the piezoelectric drive device responds very quickly, which greatly improves the The operation experience of the user is improved, and the piezoelectric driving device can be made very thin, so it occupies a small space, which is helpful to realize the miniaturization of the lens module.

【Description of drawings】

1 is a schematic structural diagram of a lens module provided by an embodiment of the present invention;

Fig. 2 is the sectional schematic diagram along the line A～A of Fig. 1;

3 is an exploded schematic view of a lens module provided by an embodiment of the present invention;

FIG. 4 is an assembly schematic diagram of the first fixed block, the second fixed block, the third fixed block, the fourth fixed block and the piezoelectric driving device shown in FIG. 3;

FIG. 5 is a schematic structural diagram of the elastic support shown in FIG. 3 .

Reference numerals: 100, lens module; 10, housing; 20, lens; 30, first fixing block; 40, second fixing block; 50, piezoelectric driving device; 51, first piezoelectric sheet; 52, first Two piezoelectric sheets; 11, accommodating cavity; 12, side plate; 13, first cover plate; 14, second cover plate; 131, light through hole; 60, flexible circuit board; 70, third fixing block; 80, Fourth fixing block; 90, elastic support; 91, inner frame; 92, outer frame; 93, flexible connecting beam.

【detailed description】

The present utility model will be further described below with reference to the accompanying drawings and embodiments.

It should be noted that all directional indications (such as up, down, left, right, front, back, inner, outer, top, bottom...) in the embodiments of the present invention are only used to explain the If the specific posture changes, the directional indication also changes accordingly.

It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Referring to FIGS. 1-5 , a lens module 100 provided by an embodiment of the present invention is suitable for electronic equipment. The lens module 100 includes a housing 10 , a lens 20 , a first fixing block 30 , and a second fixing block 40 and the piezoelectric drive device 50 , the housing 10 is provided with a receiving cavity 11 , the lens 20 , the first fixing block 30 , the second fixing block 40 and the piezoelectric driving device 50 are all arranged in the receiving cavity 11 , and the lens 20 is suspended in the receiving cavity 11 and can move relative to the housing 10, the first fixed block 30 and the second fixed block 40 are arranged opposite to each other along the optical axis direction of the lens 20, and the first fixed block 30 is fixed around the outer circumference of the lens 20, and the second fixed block 40 is fixed on the inner wall of the housing 10, the piezoelectric driving device 50 is located between the first fixing block 30 and the second fixing block 40 and is arranged around the lens 20, and the piezoelectric driving device 50 passes through the first fixing block 30 and the lens. 20 is connected to the housing 10 through the second fixing block 40 , and the piezoelectric driving device 50 is used to drive the lens 20 to perform a yaw motion.

The piezoelectric driving device 50 includes a first piezoelectric sheet 51 and a second piezoelectric sheet 52 stacked along the optical axis direction of the lens 20 , the first piezoelectric sheet 51 is connected to the second fixing block 40 , and the second piezoelectric sheet 52 Connect with the first fixing block 30 . It can be understood that the arrangement of the piezoelectric driving device 50 is not limited to the above, for example, an additional deformable support member may be provided between the first piezoelectric sheet 51 and the second piezoelectric sheet 52 .

The piezoelectric driving device 50 has a piezoelectric effect, that is, when voltages in different directions are applied to the first piezoelectric sheet 51 and the second piezoelectric sheet 52, the first piezoelectric sheet 51 and the second piezoelectric sheet 52 will Deformation will occur, specifically, one of the first piezoelectric sheet 51 and the second piezoelectric sheet 52 is stretched, and the other is contracted, so that the piezoelectric driving device 50 is convex or concave as a whole (even if the piezoelectric driving The device 50 is arch-shaped), and the degree of convexity or concave of the piezoelectric drive device 50 is related to the magnitude of the input voltage, and drives the lens 20 to oscillate to compensate for the displacement of the lens 20 due to shaking, and realizes the lens model. The anti-shake function of the group 100 ensures the shooting quality. Since the piezoelectric drive device 50 is provided to realize the anti-shake function, the position of the lens 20 can be adjusted conveniently and in all directions without the need for additional fulcrum structure. The first piezoelectric sheet 51 and the second piezoelectric sheet 52 respond very quickly, and can be deformed in a very short time to realize the anti-shake function, which greatly improves the user's operating experience. The piezoelectric sheet 52 can be made very thin, so the space occupied by the piezoelectric sheet 52 is small, which is helpful for realizing the miniaturization of the lens module 100 .

The type of the electronic device is not limited. For example, the electronic device may be a smart terminal such as a mobile phone or a tablet computer, or a digital device including a lens such as a camera.

The shapes of the housing 10 and the lens 20 are not limited, for example, they may be cylindrical or square.

Preferably, the extension direction of the piezoelectric driving device 50 is perpendicular to the optical axis of the lens 20 , that is, the extension direction of the first piezoelectric sheet 51 and the second piezoelectric sheet 52 is perpendicular to the optical axis of the lens 20 . When a piezoelectric sheet 51 and a second piezoelectric sheet 52 are supplied with voltages in different directions, they will expand or contract in a plane perpendicular to the optical axis.

As an improvement of this embodiment, the housing 10 includes a side plate 12 and a first cover plate 13 and a second cover plate 14 respectively connected to opposite sides of the side plate 12 . The first cover plate 13 , the side plate 12 and the second cover plate 14 The two cover plates 14 enclose the receiving cavity 11 , and the first cover plate 13 is provided with a light-through hole 131 communicating with the receiving cavity 11 , and the light-through hole 131 is disposed opposite to the lens 20 .

Preferably, the side plate 12 is a square frame formed by enclosing four plates, the first cover plate 13 and the second cover plate 14 are vertically connected on both sides of the side plate 12, so that the casing 10 is square as a whole, The light hole 131 penetrates the first cover plate 13 along the direction of the optical axis, and light can enter the lens 20 through the light hole 131 .

It can be understood that the first cover plate 13 is not necessary, that is, it is also possible not to provide the first cover plate 13; and the light through hole 131 is also not necessary. For example, when the first cover plate 13 is a transparent plate body, the light The lens 20 can also be entered through the first cover plate 13 , and the entire transparent first cover plate 13 is the light through hole 131 , as long as the light can enter the lens 20 .

In this embodiment, the lens module 100 further includes a flexible circuit board 60 , and one end of the flexible circuit board 60 is electrically connected to the lens 20 after passing through the side plate 12 .

As an improvement of this embodiment, the lens module 100 further includes a third fixing block 70 extending from the first fixing block 30 and being fixed on a surface of the piezoelectric driving device 50 , and a third fixing block 70 extending from the second fixing block 40 The fourth fixing block 80 which comes out and is fixed on the other surface of the piezoelectric driving device 50 .

In this embodiment, the third fixing block 70 is fixed on the side of the second piezoelectric sheet 52 facing the first fixing block 30 , and the fourth fixing block 80 is fixed on the side of the first piezoelectric sheet 51 facing the second fixing block 40 , the third fixed block 70 is vertically connected between one end of the second piezoelectric sheet 52 and the first fixed block 30, and the fourth fixed block 80 is vertically connected between one end of the first piezoelectric sheet 51 away from the third fixed block 70 and the first fixed block 30. Between the two fixed blocks 40 , that is, the piezoelectric drive device 50 , the first fixed block 30 and the second fixed block 40 are spaced and distributed in parallel along the optical axis direction of the lens 20 , so that the piezoelectric drive device 50 and the first fixed block 30 There is a space between the second fixing block 40 and the second fixing block 40 to allow space for the piezoelectric driving device 50 to be convex or concave. Understandably, the third fixing block 70 does not necessarily need to be vertically connected to the second piezoelectric sheet 52, and the fourth fixing block 80 does not necessarily need to be vertically connected to the first piezoelectric sheet 51. For example, the third fixing block 70, the It is also possible that the four fixing blocks 80 , the first piezoelectric sheet 51 and the second piezoelectric sheet 52 are assembled together in a zigzag shape.

Preferably, the first fixing block 30 is fixedly connected to the lens 20 , and the second fixing block 40 is fixed to the inner side of the side plate 12 and is located directly below the first fixing block 30 , that is, the first fixing block 30 is spaced away from the first fixing block 30 . On one side of the cover plate 13 , the piezoelectric driving device 50 is located between the lens 20 and the side plate 12 . It can be understood that the arrangement of the first fixing block 30 and the second fixing block 40 is not limited to the above. For example, the second fixing block 40 is fixedly connected with the lens 20 , and the first fixing block 30 is fixed with the side plate 12 . It is also possible to connect and then make one end of the lens 20 movably pass through the first fixing block 30 .

Preferably, the third fixing block 70 and the first fixing block 30 are integrally formed, and the fourth fixing block 80 and the second fixing block 40 are integrally formed. The overall strength of the first fixing block 30 and the third fixing block 70 as well as the second fixing block 40 and the fourth fixing block 80 is guaranteed. It can be understood that the first fixing block 30 and the third fixing block 70 and the second fixing block 40 and the fourth fixing block 80 can also be assembled and formed separately.

As an improvement of this embodiment, a plurality of piezoelectric driving devices 50 are provided, and the plurality of piezoelectric driving devices 50 are evenly spaced along the circumferential direction of the lens 20 , that is, any two adjacent piezoelectric driving devices 50 The distances between the centers of the lens 20 are the same. When voltages of different magnitudes are applied to the plurality of piezoelectric driving devices 50, the deformation amount generated by each piezoelectric driving device 50 is also different, and the lens 20 will change from the one with the larger deformation amount. The side is inclined toward the side with the smaller deformation (or inclined from the convex side to the concave side), so that the lens 20 performs a yaw motion, and since there are multiple piezoelectric drive devices, multiple drive devices 50 By cooperating with each other, the lens 20 is controlled to swing so as to adjust the position of the lens 20 in an all-round way, thereby improving the anti-shake effect of the lens module 100 . Specifically, there are three piezoelectric driving devices 50 , the center line of the three piezoelectric driving devices 50 is an equilateral triangle, and one end of each piezoelectric driving device 50 is fixedly connected with a third fixing block 70 , The other end is fixedly connected with a fourth fixing block 80 , and the three piezoelectric driving devices 50 jointly control the movement of the lens 20 . It can be understood that the distance between two adjacent piezoelectric driving devices 50 may also be different.

As an improvement of this embodiment, the lens module 100 further includes an elastic support member 90, the elastic support member 90 is located between the first cover plate 13 and the first fixing block 30, and the elastic support member 90 can serve to support the lens The elastic support member 90 includes an inner frame 91, an outer frame 92 and a flexible connecting beam 93, the inner frame 91 and the outer frame 92 are annular, and the inner frame 91 is annular The outer frame 92 is arranged outside the lens 20 and is fixedly connected to the lens 20. The outer frame 92 is arranged around the inner frame 91 and is spaced apart from the inner frame 91. The outer frame 92 is fixed to the inner wall of the side plate 12. The flexible connecting beam 93 is located between the inner frame 91 and the outer frame 91. Between the frames 92 , one end of the flexible connecting beam 93 is fixedly connected to the outer frame 92 , and the other end extends to the inner frame 91 along an arc-shaped track.

In this embodiment, when the piezoelectric driving device 50 drives the lens 20 to move, since the inner frame 91 is fixedly connected with the lens 20, the inner frame 91 will move with the lens 20, so that the flexible connecting beam 93 is deformed, and the flexibility The connecting beam 93 is preferably made of a flexible material, and the flexible connecting beam 93 extends from the outer frame 92 to the inner frame 91 along an arc-shaped trajectory, which increases the length of the flexible connecting beam 93, thereby reducing the rigidity of the flexible connecting beam 93, effectively Therefore, the problem of affecting the movement of the lens 20 due to the excessive rigidity of the flexible connecting beam 93 is avoided.

Preferably, three flexible connecting beams 93 are provided, and the three flexible connecting beams 93 are evenly spaced between the inner frame 91 and the outer frame 92, that is, the inner frame 91 and the outer frame 92 are evenly distributed with three connection points, One end of the flexible connecting beam 93 is connected to the connecting point on the inner frame 91, and the other end extends along the arc-shaped trajectory to a corresponding connecting point on the outer frame 92, so that the three flexible connecting beams 93 are dislocated. Therefore, the three flexible connecting beams The lengths of 93 do not affect each other. It can be understood that the number of the flexible connecting beams 93 is not limited to three, for example, one, two or other numbers are also possible, and the flexible connecting beams 93 do not necessarily need to extend in an arc shape, for example, flexible It is also possible that the connecting beam 93 extends vertically or obliquely from the inner frame 91 to the outer frame 92 .

The above are only the embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these belong to The scope of protection of the utility model.

Claims (11)

A lens module is characterized in that it comprises a casing with an accommodation cavity, a lens suspended in the accommodation cavity, a first fixing block surrounding and fixed to the lens, and spaced from the first fixing block. and a second fixing block fixed to the casing, and a piezoelectric driving device arranged between the first fixing block and the second fixing block, the piezoelectric driving device is arranged around the lens to drive the lens to perform yaw motion. The lens module according to claim 1, wherein the extension direction of the piezoelectric driving device is perpendicular to the optical axis of the lens. The lens module according to claim 1, wherein the first fixing block, the piezoelectric driving device and the second fixing block are spaced and distributed in parallel along the optical axis direction of the lens. The lens module according to claim 1, wherein the lens module further comprises a third fixing block extending from the first fixing block and fixed on a surface of the piezoelectric driving device, and a third fixing block extending from the first fixing block and fixed on a surface of the piezoelectric driving device A fourth fixing block extending from the second fixing block and being fixed on the other surface of the piezoelectric driving device. The lens module according to claim 4, wherein the third fixing block is fixed to one end of the piezoelectric driving device, and the fourth fixing block is fixed to the other end of the piezoelectric driving device. The lens module according to claim 4, wherein the piezoelectric driving device comprises a first piezoelectric sheet and a second piezoelectric sheet arranged in layers, and the third fixing block is fixed on the second piezoelectric sheet. The electric sheet faces the side of the first fixing block, and the fourth fixing block is fixed to the side of the first piezoelectric sheet that faces the second fixing block. The lens module according to claim 4, wherein the third fixing block and the first fixing block are integrally formed or separately assembled; and/or, The fourth fixing block and the second fixing block are integrally formed or separately assembled. The lens module according to claim 1, wherein a plurality of piezoelectric driving devices are provided, and the plurality of piezoelectric driving devices are evenly spaced along the circumferential direction of the lens. The lens module according to claim 1, wherein the housing comprises a side plate and a first cover plate and a second cover plate respectively connected to opposite sides of the side plate, the first cover plate, The side plate and the second cover plate are enclosed to form the receiving cavity, the first cover plate is provided with a light-through hole communicating with the receiving cavity and facing the lens, and the piezoelectric A driving device is located between the lens and the side plate. The lens module according to claim 1, wherein the lens module further comprises an elastic support member connected between the lens and the inner wall of the receiving cavity, and the elastic support member comprises a ring mounted on a The inner frame of the lens, the outer frame arranged around the inner frame and spaced from the inner frame, and the flexible connecting beam connected between the inner frame and the outer frame, the outer frame fixedly connected to the housing. The lens module according to claim 10, wherein one end of the flexible connecting beam is connected to the outer frame, and the other end extends to the inner frame along an arc-shaped trajectory.