CN213581531U

CN213581531U - Lens module

Info

Publication number: CN213581531U
Application number: CN202021245801.1U
Authority: CN
Inventors: 王洪兴; 郭顺; 史卫领
Original assignee: Chengrui Optics Changzhou Co Ltd
Current assignee: AAC Optics Changzhou Co Ltd; Chengrui Optics Changzhou Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-06-29
Anticipated expiration: 2030-06-30
Also published as: WO2022000540A1

Abstract

The utility model discloses a lens module, including having the shell of acceping the chamber, suspend in the camera lens of acceping the intracavity, encircle establish the first fixed block that is fixed in the camera lens, set up and be fixed in the second fixed block of shell and set up the piezoelectric drive device between first fixed block and second fixed block with first fixed block interval, the piezoelectric drive device ring is located the camera lens and is made the beat motion with the drive camera lens all around. The utility model discloses a lens module, piezoelectric drive device can drive the camera lens beat in order to realize the anti-shake function, consequently need not additionally set up the fulcrum structure again, can be convenient, the position of omnidirectional adjusting lens, and piezoelectric drive device responds very rapidly moreover, has promoted user's operation greatly and has experienced, and piezoelectric drive device can be done simultaneously very thin, and its occupation space is little consequently, helps realizing the miniaturization of lens module.

Description

Lens module

[ technical field ] A method for producing a semiconductor device

The utility model relates to a camera lens optical imaging technical field especially relates to a camera lens module.

[ background of the invention ]

In recent years, high performance lens modules are mounted on electronic products such as smart phones, tablet computers, and cameras. When taking a picture, if the lens module shakes to blur the shot picture, the lens module usually has an anti-shake function in order to ensure the quality of the shot image.

The current anti-shake scheme is usually installed drive coil and magnet steel in the side of camera lens, adjusts the position of camera lens through side thrust to realize the anti-shake function of lens module. But the mode response of electromagnetic drive is relatively slow, and side-mounting electromagnetism thrust unit need set up the angle of fulcrum structure just can be convenient adjustment camera in the bottom moreover to influence user's operation experience and the product property ability of lens module, unsatisfied lens module quick response's characteristics.

Therefore, there is a need for an improved lens module to solve the above problems.

[ Utility model ] content

An object of the utility model is to provide a lens module, it has the response rapidly, does not need the bottom fulcrum structure can be convenient with the advantage of omnidirectional adjustment camera position.

The purpose of the utility model is realized by adopting the following technical scheme:

a lens module comprises a shell with an accommodating cavity, a lens suspended in the accommodating cavity, a first fixed block fixed on the lens, a second fixed block arranged at an interval with the first fixed block and fixed on the shell, and a piezoelectric driving device arranged between the first fixed block and the second fixed block, wherein the piezoelectric driving device is annularly arranged around the lens to drive the lens to make deflection 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 fixed block, the piezoelectric driving device and the second fixed block are distributed in parallel at intervals along the optical axis direction of the lens.

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

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

As a modification, the piezoelectric driving device includes a first piezoelectric sheet and a second piezoelectric sheet which are stacked, the third fixing block is fixed to a side of the second piezoelectric sheet facing the first fixing block, and the fourth fixing block is fixed to a side of the first piezoelectric sheet facing the second fixing block.

As an improvement, the third fixed block and the first fixed block are integrally formed or assembled and formed in a split mode; and/or the presence of a gas in the atmosphere,

the fourth fixed block and the second fixed block are integrally formed or assembled and formed in a split mode.

As an improvement, the piezoelectric driving device is provided with a plurality of piezoelectric driving devices, and the plurality of piezoelectric driving devices are uniformly distributed at intervals along the circumferential direction of the lens.

As an improvement, the housing includes a side plate, and a first cover plate and a second cover plate respectively connected to two opposite sides of the side plate, the first cover plate, the side plate and the second cover plate enclose to form the accommodating cavity, the first cover plate is provided with a light through hole which is communicated with the accommodating cavity and is opposite to the lens in a penetrating manner, and the piezoelectric driving device is located between the lens and the side plate.

As an improvement, the lens module further includes an elastic support member connected between the lens and the inner wall of the accommodating chamber, the elastic support member includes an inner frame fixed to the lens, an outer frame surrounding the inner frame and spaced from the inner frame, and a flexible connecting beam connected between the inner frame and the outer frame, and the outer frame is fixedly connected to the housing.

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

The utility model discloses embodiment is for prior art, through setting up with camera lens fixed connection's first fixed block and with shell fixed connection's second fixed block, be connected with piezoelectric drive device between first fixed block and the second fixed block, when piezoelectric drive device lets in the voltage of different polarity, piezoelectric drive device will produce deformation, and then drive camera lens carry out the beat motion to the displacement that the compensation camera lens produced because of shaking, realize the anti-shake function of camera lens module, in order to guarantee to shoot the quality. Owing to be provided with the piezoelectric drive device that can realize lens module anti-shake function, consequently need not additionally set up the fulcrum structure again, can be convenient, the position of omnidirectional adjustment camera lens, piezoelectric drive device responds very rapidly moreover, has promoted user's operation experience greatly, and piezoelectric drive device can be done very thinly simultaneously, and its occupation space is little consequently, helps realizing the miniaturization of lens module.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of a lens module according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is an exploded schematic view of a lens module according to an embodiment of the present invention;

fig. 4 is an assembly view of the first fixing block, the second fixing block, the third fixing block, the fourth fixing block and the piezoelectric driving device shown in fig. 3;

fig. 5 is a schematic structural view of the elastic support member shown in fig. 3.

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

[ detailed description ] embodiments

The present invention will be further described with reference to the accompanying drawings and embodiments.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, back, inner, outer, top, bottom … …) in the embodiments of the present invention are only used to explain the relative position between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

It will also be understood that when an element is referred to as being "secured 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 fig. 1 to 5, a lens module 100 according to an embodiment of the present invention is suitable for an electronic device, the lens module 100 includes a housing 10, a lens 20, a first fixing block 30, a second fixing block 40 and a piezoelectric driving device 50, the housing 10 includes 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 disposed in the receiving cavity 11, the lens 20 is suspended in the receiving cavity 11 and can move relative to the housing 10, the first fixing block 30 and the second fixing block 40 are disposed opposite to each other along an optical axis direction of the lens 20, the first fixing block 30 is fixed around the lens 20, the second fixing block 40 is fixed on an inner wall of the housing 10, the piezoelectric driving device 50 is disposed between the first fixing block 30 and the second fixing block 40 and around the lens 20, and the piezoelectric driving device 50 is connected to the lens 20 through the first fixing block 30, The piezoelectric driving device 50 is connected to the housing 10 through the second fixing block 40, and is used for driving the lens 20 to perform a yawing motion.

The piezoelectric driving device 50 includes a first piezoelectric sheet 51 and a second piezoelectric sheet 52 stacked in the optical axis direction of the lens 20, the first piezoelectric sheet 51 being connected to the second fixed block 40, and the second piezoelectric sheet 52 being connected to the first fixed block 30. It is understood that the arrangement of the piezoelectric driving device 50 is not limited to the above, and for example, a deformable support member may be additionally arranged 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 patch 51 and the second piezoelectric patch 52, the first piezoelectric patch 51 and the second piezoelectric patch 52 are deformed, specifically, one of the first piezoelectric patch 51 and the second piezoelectric patch 52 is extended, and the other one is contracted, so that the piezoelectric driving device 50 is integrally protruded or recessed (even if the piezoelectric driving device 50 is arched), and the protruded or recessed degree of the piezoelectric driving device 50 is related to the magnitude of the applied voltage, and drives the lens 20 to deflect, so as to compensate the displacement of the lens 20 caused by the shake, thereby realizing the anti-shake function of the lens module 100, ensuring the shooting quality, and realizing the anti-shake function by providing the piezoelectric driving device 50, therefore, the position of the lens 20 can be conveniently and omnidirectionally adjusted without additionally providing a fulcrum structure, moreover, the first piezoelectric patch 51 and the second piezoelectric patch 52 are very fast in response, and can deform in a short time to realize the anti-shake function, so that the operation experience of a user is greatly improved, and meanwhile, the first piezoelectric patch 51 and the second piezoelectric patch 52 can be made very thin, so that the occupied space is small, and the miniaturization of the lens module 100 is facilitated.

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

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

Preferably, the extension direction of the piezoelectric driving device 50 is perpendicular to the optical axis of the lens 20, that is, the extension directions of the first piezoelectric patch 51 and the second piezoelectric patch 52 are perpendicular to the optical axis of the lens 20, so that when voltages in different directions are applied to the first piezoelectric patch 51 and the second piezoelectric patch 52, the first piezoelectric patch and the second piezoelectric patch will expand or contract in a plane perpendicular to the optical axis.

As an improvement of the present embodiment, the housing 10 includes a side plate 12, and a first cover plate 13 and a second cover plate 14 respectively connected to two opposite sides of the side plate 12, the first cover plate 13, the side plate 12, and the second cover plate 14 enclose to form an accommodating cavity 11, the first cover plate 13 is provided with a light through hole 131 communicating with the accommodating 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 plate bodies, the first cover plate 13 and the second cover plate 14 are vertically connected to two sides of the side plate 12, so that the whole housing 10 is square, the light-passing hole 131 penetrates through the first cover plate 13 along the direction of the optical axis, and light can enter the lens 20 through the light-passing hole 131.

It is understood that the first cover 13 is not essential, i.e. it is also possible that no first cover 13 is provided; the light-passing hole 131 is not necessary, for example, when the first cover 13 is a transparent plate, light can also enter the lens 20 through the first cover 13, and the transparent first cover 13 is the light-passing hole 131 as a whole, as long as 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 penetrates through the side plate 12 and is electrically connected to the lens 20.

As a modification of this embodiment, the lens module 100 further includes a third fixing block 70 extending from the first fixing block 30 and fixed to one surface of the piezoelectric driving unit 50, and a fourth fixing block 80 extending from the second fixing block 40 and fixed to the other surface of the piezoelectric driving unit 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, the fourth fixing block 80 is fixed on the side of the first piezoelectric sheet 51 facing the second fixing block 40, the third fixing block 70 is vertically connected between one end of the second piezoelectric sheet 52 and the first fixing block 30, and the fourth fixing block 80 is vertically connected between one end of the first piezoelectric sheet 51 away from the third fixing block 70 and the second fixing block 40, that is, the piezoelectric driving device 50, the first fixing block 30 and the second fixing block 40 are distributed in parallel at intervals along the optical axis direction of the lens 20, so that a space is reserved between the piezoelectric driving device 50 and the first fixing block 30 and the second fixing block 40, so as to make the piezoelectric driving device 50 protrude upward or recede downward. It is understood that the third fixing block 70 is not necessarily vertically connected to the second piezoelectric sheet 52, and the fourth fixing block 80 is not necessarily vertically connected to the first piezoelectric sheet 51, for example, it is also possible that the third fixing block 70, the fourth fixing block 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, the second fixing block 40 is fixed to the inner side of the side plate 12 and located right below the first fixing block 30, that is, at an interval, on a side of the first fixing block 30 away from the first cover plate 13, and the piezoelectric driving device 50 is located between the lens 20 and the side plate 12. It is to 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, it is also possible to fixedly connect the second fixing block 40 to the lens 20, fixedly connect the first fixing block 30 to the side plate 12, and then movably pass one end of the lens 20 through the first fixing block 30.

Preferably, the third fixing block 70 is integrally formed with the first fixing block 30, and the fourth fixing block 80 is integrally formed with the second fixing block 40. The overall strength of the first and third fixing blocks 30 and 70 and the second and fourth fixing blocks 40 and 80 is ensured. It is 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 may be formed by separate assembly.

As an improvement of this embodiment, a plurality of piezoelectric driving devices 50 are provided, and the plurality of piezoelectric driving devices 50 are uniformly distributed along the circumferential direction of the lens 20 at intervals, that is, the distances between the centers of any two adjacent piezoelectric driving devices 50 are the same, when voltages with different magnitudes are applied to the plurality of piezoelectric driving devices 50, the deformation amounts generated by the respective piezoelectric driving devices 50 are also different, and the lens 20 tilts from the side with the larger deformation amount to the side with the smaller deformation amount (or tilts from the side with the upper projection to the side with the lower projection), so that the lens 20 performs a wobbling motion, and because the plurality of piezoelectric driving devices are provided, the plurality of driving devices 50 cooperate with each other to jointly control the lens 20 to perform a wobbling motion, so as to adjust the position of the lens 20 in an omnidirectional manner, thereby improving the anti-shake effect of the lens module 100. Specifically, three piezoelectric driving devices 50 are provided, the central connecting lines of the three piezoelectric driving devices 50 are equilateral triangles, one end of each piezoelectric driving device 50 is fixedly connected with a third fixed block 70, the other end of each piezoelectric driving device 50 is fixedly connected with a fourth fixed block 80, and the three piezoelectric driving devices 50 control the movement of the lens 20 together. It is understood that the distance between two adjacent piezoelectric drivers 50 may be different.

As an improvement of the present embodiment, the lens module 100 further includes an elastic supporting member 90, the elastic supporting member 90 is located between the first cover 13 and the first fixing block 30, and the elastic supporting member 90 can play a role of supporting the lens 20, so as to suspend the lens 20 in the accommodating cavity 11, the elastic supporting 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 both annular, the inner frame 91 is annularly disposed outside the lens 20 and is fixedly connected to the lens 20, the outer frame 92 is annularly disposed inside the inner frame 91 and is spaced 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 92, one end of the flexible connecting beam 93 is fixedly connected to the outer frame 92, and the other end of the flexible connecting beam extends to the.

In this embodiment, when the piezoelectric driving device 50 drives the lens 20 to move, because the inner frame 91 is fixedly connected to the lens 20, the inner frame 91 can move along with the lens 20, so that the flexible connection beam 93 deforms, the flexible connection beam 93 is preferably made of a flexible material, and the flexible connection beam 93 extends from the outer frame 92 to the inner frame 91 along an arc-shaped track, so as to increase the length of the flexible connection beam 93, reduce the rigidity of the flexible connection beam 93, and effectively avoid the problem that the movement of the lens 20 is affected due to the over-high rigidity of the flexible connection beam 93.

Preferably, flexible coupling roof beam 93 is equipped with threely, and three flexible coupling roof beam 93 even interval sets up between inside casing 91 and frame 92, promptly, and the equipartition has three tie point on inside casing 91 and the frame 92, and the one end of flexible coupling roof beam 93 is connected with the tie point on the inside casing 91, and the other end extends to a corresponding tie point on the frame 92 along the arc orbit for three flexible coupling roof beam 93 dislocation set, therefore three flexible coupling roof beam 93's length does not influence each other. It is understood that the number of the flexible connection beams 93 is not limited to three, and for example, one, two or other numbers of the flexible connection beams 93 are possible, and the flexible connection beams 93 do not necessarily have to extend in an arc shape, and for example, it is also possible that the flexible connection beams 93 extend perpendicularly or obliquely from the inner frame 91 to the outer frame 92.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. A lens module is characterized by comprising a shell with an accommodating cavity, a lens suspended in the accommodating cavity, a first fixed block fixed on the lens in a surrounding mode, a second fixed block arranged at an interval with the first fixed block and fixed on the shell, and a piezoelectric driving device arranged between the first fixed block and the second fixed block, wherein the piezoelectric driving device is arranged around the lens to drive the lens to make deflection motion.

2. The lens module as claimed in claim 1, wherein the piezoelectric actuator extends in a direction perpendicular to the optical axis of the lens.

3. The lens module as claimed in claim 1, wherein the first fixing block, the piezoelectric driving device and the second fixing block are spaced apart and parallel to each other along an optical axis of the lens.

4. The lens module as claimed in claim 1, wherein the lens module further includes a third fixing block extending from the first fixing block and fixed to one surface of the piezoelectric actuator, and a fourth fixing block extending from the second fixing block and fixed to the other surface of the piezoelectric actuator.

5. The lens module as claimed in 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.

6. The lens module as claimed in claim 4, wherein the piezoelectric actuator includes a first piezoelectric plate and a second piezoelectric plate stacked together, the third fixing block is fixed to the second piezoelectric plate on a side facing the first fixing block, and the fourth fixing block is fixed to the first piezoelectric plate on a side facing the second fixing block.

7. The lens module as claimed in claim 4, wherein the third fixing block is integrally formed with the first fixing block or separately assembled; and/or the presence of a gas in the atmosphere,

8. The lens module as claimed in claim 1, wherein the piezoelectric actuator is provided in plural numbers, and the plural piezoelectric actuators are uniformly spaced along the circumference of the lens.

9. The lens module as claimed in claim 1, wherein the housing includes a side plate, and a first cover plate and a second cover plate respectively connected to two opposite sides of the side plate, the first cover plate, the side plate and the second cover plate enclose the receiving cavity, the first cover plate has a light-passing hole penetrating therethrough, the light-passing hole is in communication with the receiving cavity and faces the lens, and the piezoelectric actuator is located between the lens and the side plate.

10. The lens module as claimed in claim 1, further comprising an elastic supporting member connected between the lens and the inner wall of the accommodating chamber, wherein the elastic supporting member comprises an inner frame fixed around the lens, an outer frame surrounding the inner frame and spaced from the inner frame, and a flexible connecting beam connected between the inner frame and the outer frame, and the outer frame is fixedly connected to the housing.

11. The lens module as claimed in claim 10, wherein one end of the flexible beam is connected to the outer frame, and the other end extends to the inner frame along an arc-shaped path.