CN111142309A

CN111142309A - Piezoelectric optical anti-shake mechanism, camera device, and electronic apparatus

Info

Publication number: CN111142309A
Application number: CN202010055989.1A
Authority: CN
Inventors: 余林涛; 曹宏
Original assignee: Ruien Photoelectric Co Ltd
Current assignee: Ruien Photoelectric Co Ltd
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2020-05-12

Abstract

The present disclosure provides a piezoelectric optical anti-shake mechanism, including: a lens support for accommodating at least one lens; a first frame forming a space for accommodating the lens support part, and the lens support part can be controlled to move relative to the first frame so as to perform automatic focusing; a second frame body forming a space for accommodating the first frame body; a third frame body forming a space for accommodating the second frame body; a first piezoelectric driving device located between the first frame and the second frame so as to drive the first frame in a first direction with respect to the second frame; and a second piezoelectric driving device located between the second frame and the third frame so as to drive the second frame in a second direction with respect to the third frame, wherein the first direction is perpendicular to the second direction and is located in a plane perpendicular to an optical axis direction of the lens. The disclosure also provides a camera device and an electronic device.

Description

Piezoelectric optical anti-shake mechanism, camera device, and electronic apparatus

Technical Field

The present disclosure relates to a piezoelectric optical anti-shake mechanism, a camera device, and an electronic apparatus.

Background

Camera modules having an Auto Focusing (AF) function are widely used in mobile electronic products such as digital cameras, mobile phones, or tablet computers. However, the auto-focus motor can only drive the lens to move in the optical axis direction, and thus the problem caused by such lens deflection cannot be solved, and therefore, the camera module should have not only an auto-focus function but also an optical anti-shake function.

However, the optical anti-shake device in the prior art has a complex structure, and the control in different directions is easy to interfere, resulting in an unsatisfactory anti-shake effect.

Disclosure of Invention

To solve at least one of the above technical problems, the present disclosure provides a piezoelectric motor.

According to an aspect of the present disclosure, a piezoelectric optical anti-shake mechanism includes: a lens support for accommodating at least one lens; a first frame body forming a space for accommodating the lens support part, and the lens support part being controllable to move relative to the first frame body for auto-focusing; a second frame body forming a space for accommodating the first frame body; a third frame body forming a space for accommodating the second frame body; a first piezoelectric driving device located between the first frame and the second frame so as to drive the first frame in a first direction with respect to the second frame; and a second piezoelectric driving device located between the second frame and the third frame so as to drive the second frame in a second direction with respect to the third frame, wherein the first direction is perpendicular to the second direction and is located in a plane perpendicular to an optical axis direction of the lens.

According to the piezoelectric optical anti-shake mechanism of at least one embodiment of the present disclosure, the first piezoelectric driving means includes a first piezoelectric element provided at an inner side wall of the second frame, and a first rod-shaped portion provided on the first piezoelectric element and in contact with an outer side surface of the first frame, deformation of the first piezoelectric element causing the first rod-shaped portion to drive the first frame in the first direction.

According to the piezoelectric optical anti-shake mechanism of at least one embodiment of the present disclosure, the second piezoelectric driving means includes a second piezoelectric element provided at an inner side wall of the third frame, and a second rod-shaped portion provided on the second piezoelectric element and in contact with an outer side surface of the second frame, deformation of the second piezoelectric element causing the second rod-shaped portion to drive the second frame in the second direction.

According to the piezoelectric optical anti-shake mechanism of at least one embodiment of the present disclosure, the permanent magnet is provided on the outer side of the lens support portion, the driving coil is provided on the inner side surface of the first frame at a position corresponding to the position where the permanent magnet is provided, and the movement of the lens support portion with respect to the first frame is controlled by controlling the current supplied to the driving coil.

According to the piezoelectric optical anti-shake mechanism of at least one embodiment of the present disclosure, the first piezoelectric driving device is located on a first side of the optical anti-shake mechanism, and the second piezoelectric optical anti-shake mechanism is located on a second side of the optical anti-shake mechanism adjacent to the first side.

According to the piezoelectric optical anti-shake mechanism of at least one embodiment of the present disclosure, the first ball is provided between the first frame and the second frame on the third side of the optical anti-shake mechanism, and the third side is opposite to the first side.

According to the piezoelectric optical anti-shake mechanism of at least one embodiment of the present disclosure, the first balls include two sets of balls, each set of balls includes three balls in the optical axis direction, and V-shaped grooves are provided on the second frame body so as to accommodate the balls.

According to the piezoelectric optical anti-shake mechanism of at least one embodiment of the present disclosure, the second ball is disposed between the second frame and the third frame on the fourth side of the optical anti-shake mechanism, and the fourth side is opposite to the second side.

According to the piezoelectric optical anti-shake mechanism of at least one embodiment of the present disclosure, the second balls include two sets of balls, each set of balls includes three balls in the optical axis direction, and V-shaped grooves are provided on the third frame body so as to accommodate the balls.

The piezoelectric optical anti-shake mechanism according to at least one embodiment of the present disclosure further includes first direction position detection means provided in the vicinity of the first piezoelectric driving means for detecting a position change of the lens support portion in the first direction, and second direction position detection means provided in the vicinity of the second piezoelectric driving means for detecting a position change of the lens support portion in the second direction.

According to the piezoelectric type optical anti-shake mechanism of at least one embodiment of the present disclosure, the first direction position detection means includes a first detection permanent magnet provided on the first frame body, and a sensor is provided at a corresponding position of the second frame body to detect a change in a magnetic field of the first detection permanent magnet; the second direction position detection device includes a second detection permanent magnet provided on the second frame body, and a sensor is provided at a corresponding position of the third frame body to detect a change in the magnetic field of the second detection permanent magnet.

According to the piezoelectric optical anti-shake mechanism of at least one embodiment of the present disclosure, the third ball is provided in the vicinity of the first detection permanent magnet and between the lower side wall of the bottom wall of the first frame and the upper side wall of the bottom wall of the second frame, so that the first frame moves smoothly with respect to the second frame.

According to the piezoelectric optical anti-shake mechanism of at least one embodiment of the present disclosure, the fourth ball is provided in the vicinity of the second detection permanent magnet and between the lower side wall of the bottom wall of the second frame and the upper side wall of the bottom wall of the third frame, so that the second frame moves smoothly with respect to the third frame.

According to still another aspect of the present disclosure, a camera apparatus includes the piezoelectric optical anti-shake mechanism as described in any one of the above.

According to still another aspect of the present disclosure, an electronic apparatus includes the camera device as described above.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

Fig. 1 is a schematic view of a piezoelectric driving device of a piezoelectric optical anti-shake mechanism according to an embodiment of the present disclosure.

Fig. 2 is a schematic operation diagram of the piezoelectric driving device shown in fig. 1.

Fig. 3 is a schematic view of the electrode surface of the piezoelectric actuator shown in fig. 1.

Fig. 4 is a piezoelectric optical anti-shake mechanism according to one embodiment of the present disclosure.

Fig. 5 is a partial side view of the piezoelectric optical anti-shake mechanism shown in fig. 4.

Fig. 6 is a partial bottom view of the piezoelectric optical anti-shake mechanism shown in fig. 4.

Description of reference numerals:

10 piezoelectric type optical anti-shake mechanism

100 piezoelectric driving device

101 piezoelectric element

101a first part of a piezoelectric element

101b second part of the piezoelectric element

101c third part of the piezoelectric element

101d fourth part of piezoelectric element

1011 electrode terminal

1012 ground terminal

102 rod-shaped part

103 groove

100A first piezoelectric driving device

101A first piezoelectric element

102A first rod-shaped part

100B second piezoelectric drive device

101B second piezoelectric element

102B second rod-shaped part

201 lens support

202A first permanent magnet

203A first drive coil

202B second permanent magnet

203B second driving coil

204 first rolling ball

205 first V-groove

206 second ball

207 second V-shaped groove

208A first direction position detection device

2081A first detecting permanent magnet

2082A first sensor

2083A first magnetic yoke

208B second-direction position detecting device

2081B second detecting permanent magnet

2082B second sensor

2083B second magnetic yoke

210 first frame body

220 second frame body

230 third frame body

301 third ball

302 fourth ball

Detailed Description

The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. Technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Unless otherwise indicated, the illustrated exemplary embodiments/examples are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Accordingly, unless otherwise indicated, features of the various embodiments may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present disclosure.

The use of cross-hatching and/or shading in the drawings is generally used to clarify the boundaries between adjacent components. As such, unless otherwise noted, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, proportion, commonality between the illustrated components and/or any other characteristic, attribute, property, etc., of a component. Further, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. While example embodiments may be practiced differently, the specific process sequence may be performed in a different order than that described. For example, two processes described consecutively may be performed substantially simultaneously or in reverse order to that described. In addition, like reference numerals denote like parts.

When an element is referred to as being "on" or "on," "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no intervening elements present. For purposes of this disclosure, the term "connected" may refer to physically, electrically, etc., and may or may not have intermediate components.

For descriptive purposes, the present disclosure may use spatially relative terms such as "below … …," "below … …," "below … …," "below," "above … …," "above," "… …," "higher," and "side (e.g., as in" side walls ") to describe one component's relationship to another (other) component as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below … …" can encompass both an orientation of "above" and "below". Further, the devices may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Referring to fig. 1, there is provided a schematic view of a piezoelectric driving device of a piezoelectric optical anti-shake mechanism according to an embodiment of the present disclosure, in which fig. 1(a) shows a plan view of the piezoelectric driving device, fig. 1(b) shows a side view of the plan view, and fig. 1(c) shows a bottom view of the plan view.

As shown in fig. 1, the piezoelectric driving device 100 may include a piezoelectric element 101 and a rod portion 102.

The piezoelectric element 101 may be composed of four parts, and the specific composition will be described in detail below.

The rod-shaped portion 102 may be made of metal, may be in the shape of a circular rod, and may be provided on the piezoelectric element 101.

At the position where the rod-shaped portion of the piezoelectric element 101 is provided, a groove 103 may be provided. The shape of the recess 103 may be triangular, but may also be other shapes. The groove 103 is used to accommodate a part of the rod portion 102, and the groove 103 may also be filled with an adhesive resin to fix the rod portion 102 to the piezoelectric element 101.

When the piezoelectric element 101 is deformed by electricity, the rod-shaped portion 102 is moved. This will be explained with reference to fig. 2.

In fig. 2, an operation diagram of the piezoelectric driving device 100 is shown. The piezoelectric element 101 includes four parts: a first portion 101a, a second portion 101b, a third portion 101c and a fourth portion 101 d. As shown in fig. 2(a), when the second portion 101b and the third portion 101c are energized, the piezoelectric driving device 100 will act in the direction shown in fig. 2(a), and when the first portion 101a and the fourth portion 101d are energized, the piezoelectric driving device 100 will act in the direction shown in fig. 2 (b).

Fig. 3 shows a schematic diagram of an electrode surface of the piezoelectric actuator 100, which may be provided with electrode terminals 1011 and a ground terminal 1012, in order to supply power to the piezoelectric element 101 of the piezoelectric actuator 100 via these electrode terminals.

Fig. 4 shows a piezoelectric optical anti-shake mechanism 10 according to one embodiment of the present disclosure. The piezoelectric optical anti-shake mechanism 10 includes: a lens support part 201, the lens support part 201 being used for accommodating at least one lens, a first frame body 210, the first frame body 210 forming a space for accommodating the lens support part 201, and the lens support part 201 being capable of being controlled to move relative to the first frame body 210 for auto-focusing; a second frame body 220, the second frame body 220 forming a space to accommodate the first frame body 210; a third frame body 230, the third frame body 230 forming a space to accommodate the second frame body 220; a first piezoelectric driving device 100A, the first piezoelectric driving device 100A being located between the first frame body 210 and the second frame body 220 so as to drive the first frame body 210 in a first direction with respect to the second frame body 220; and a second piezoelectric driving device 100B, the second piezoelectric driving device 100B being located between the second frame 220 and the third frame 230 so as to drive the second frame 220 in a second direction with respect to the third frame 230, wherein the first direction is perpendicular to the second direction and is located in a plane perpendicular to the optical axis direction of the lens.

When the first piezoelectric driving device 100A drives the first frame body 210 to move relative to the second frame body 220 in the first direction (vertical direction along the paper surface in fig. 4), interference with the positional relationship or relative movement between the second frame body 220 and the third frame body 220 is avoided.

When the second piezoelectric driving device 100B drives the second housing 220 to move relative to the third housing 230 in the second direction (horizontal direction along the paper surface in fig. 4), interference with the positional relationship or relative movement between the first housing 210 and the second housing 220 is avoided.

Preferably, the first piezoelectric driving device 100A includes a first piezoelectric element 101A and a first rod-shaped portion 102A, the first piezoelectric element 101A is disposed at an inner side wall of the second frame body 220, the first rod-shaped portion 102A is disposed on the first piezoelectric element 101A and is in contact with an outer side face of the first frame body 210, and deformation of the first piezoelectric element 101A causes the first rod-shaped portion 102A to drive the first frame body 210 in a first direction (vertical direction along the paper face in fig. 4).

Preferably, the second piezoelectric driving device 100B includes a second piezoelectric element 101B and a second rod-shaped portion 102B, the second piezoelectric element 101B is disposed at an inner side wall of the third frame 230, the second rod-shaped portion 102B is disposed on the second piezoelectric element 101B and is in contact with an outer side face of the second frame 220, and deformation of the second piezoelectric element 101B causes the second rod-shaped portion 102B to drive the second frame 220 in the second direction (horizontal direction along the paper face in fig. 4).

Preferably, the first piezoelectric driving device 100A is located on a first side of the optical anti-shake mechanism 10, and the second piezoelectric driving device 100B is located on a second side of the optical anti-shake mechanism 10 adjacent to the first side.

Preferably, a permanent magnet is disposed on the outside of the lens supporting part 201, a driving coil is disposed on the inner side surface of the first frame 210 at a position corresponding to the position where the permanent magnet is disposed, and the movement of the lens supporting part 201 with respect to the first frame 210 is controlled by controlling the current supplied to the driving coil.

Preferably, two sets of permanent magnets and drive coils are included, the first set of permanent magnets and drive coils being: a first permanent magnet 202A and a first drive coil 203A, and a second set of permanent magnets and drive coils: a second permanent magnet 202B and a second driving coil 203B. The first set of permanent magnets and drive coils are disposed opposite the second set of permanent magnets and drive coils.

Preferably, the first ball 204 is disposed between the first housing 210 and the second housing 220 on a third side of the optical anti-shake mechanism 10, the third side being opposite to the first side.

Preferably, the first balls 204 include two sets of three balls in the optical axis direction, and the first V-shaped groove 205 is provided on the second frame 202 so as to accommodate the balls. As can be seen in fig. 4, the two sets of first balls 204 are spaced apart. Accordingly, two sets of first V-shaped grooves 205 are also provided at intervals.

Preferably, on the fourth side of the optical anti-shake mechanism 10, the second ball 206 is disposed between the second frame 220 and the third frame 230, and the fourth side is opposite to the second side.

Preferably, the second balls 206 include two sets of three balls in the optical axis direction, and a second V-shaped groove 207 is provided on the third frame body 230 so as to accommodate the balls. As can be seen in fig. 4, the two sets of second balls 206 are spaced apart. Accordingly, two sets of second V-shaped grooves 207 are also provided at intervals.

The spacing distance of the two sets of first balls 204 and the spacing distance of the two sets of second balls 206 are preferably set to be the same.

According to a preferred embodiment of the present disclosure, the piezoelectric optical anti-shake mechanism 10 further includes first direction position detection means 208A and second direction position detection means 208B, the first direction position detection means 208A being provided in the vicinity of the first piezoelectric driving means 100A for detecting a position change of the lens support 201 in the first direction, the second direction position detection means 208B being provided in the vicinity of the second piezoelectric driving means 100B for detecting a position change of the lens support 201 in the second direction. The first direction in fig. 4 is a vertical direction along the paper, and the second direction is a horizontal direction along the paper.

Preferably, the first direction position detection device 208A includes a first detection permanent magnet 2081A, the first detection permanent magnet 2081A is disposed on the first frame 210, and a first sensor 2082A is disposed at a corresponding position of the second frame 220 to detect a change in the magnetic field of the first detection permanent magnet 2081A; the second direction position detection device 208B includes a second detection permanent magnet 2081B, the second detection permanent magnet 2081B is provided on the second frame 220, and a second sensor 2082B is provided at a corresponding position of the third frame 230 to detect a change in the magnetic field of the second detection permanent magnet 2081A.

Preferably, the first sensor 2082A is disposed on the first yoke 2083A, and the first yoke 2083A is disposed on the second frame 220 at a position opposite to the first detecting permanent magnet 2081A.

Preferably, the second sensor 2082B is disposed on the second yoke 2083B, and the second yoke 2083B is disposed on the third frame body 230 at a position opposite to the second detection permanent magnet 2081B.

Fig. 5 is a partial side view of the piezoelectric optical anti-shake mechanism 10 shown in fig. 4.

Fig. 6 is a partial bottom view of the piezoelectric optical anti-shake mechanism 10 shown in fig. 4.

Referring to fig. 4, 5 and 6, the first frame body 210 has a side wall and a bottom wall, the second frame body 220 has a side wall and a bottom wall, and the third frame body 230 has a bottom wall and a side wall.

Preferably, third balls 301 are provided between the lower surface of the bottom wall of the first frame 210 and the upper surface of the bottom wall of the second frame 220, the number of the third balls 301 may be one or more so that the first frame 210 moves smoothly with respect to the second frame 220, and fourth balls 302 are provided between the lower surface of the bottom wall of the second frame 220 and the upper surface of the bottom wall of the third frame 230, the number of the fourth balls may be one or more so that the second frame 220 moves smoothly with respect to the third frame 230.

More preferably, the third ball 301 is provided in the vicinity of the first detection permanent magnet 2081A and between the lower surface of the bottom wall of the first frame 210 and the upper surface of the bottom wall of the second frame 220.

More preferably, the fourth ball 302 is provided in the vicinity of the second detection permanent magnet 2081B and between the lower surface of the bottom wall of the second frame 220 and the upper surface of the bottom wall of the third frame 230.

The piezoelectric optical anti-shake mechanism 10 of the present disclosure does not interfere with each other when anti-shake control is performed in different directions.

According to still another aspect of the present disclosure, there is provided a camera apparatus including the piezoelectric optical anti-shake mechanism 10 as described above.

According to yet another aspect of the present disclosure, there is provided an electronic apparatus including the camera device as described above.

In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.

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

It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.

Claims

1. A piezoelectric optical anti-shake mechanism, comprising:

a lens support for accommodating at least one lens;

a first frame body forming a space accommodating the lens support part, and the lens support part being controllable to move relative to the first frame body so as to perform auto-focusing;

a second frame body forming a space accommodating the first frame body;

a third frame body forming a space accommodating the second frame body;

a first piezoelectric driving device located between the first frame and the second frame so as to drive the first frame in a first direction with respect to the second frame; and

a second piezoelectric driving device located between the second frame and the third frame so as to drive the second frame in a second direction with respect to the third frame,

wherein the first direction is perpendicular to the second direction and lies in a plane perpendicular to an optical axis direction of the lens.

2. The piezoelectric optical anti-shake mechanism according to claim 1, wherein the first piezoelectric driving means includes a first piezoelectric element provided at an inner side wall of a second frame, and a first rod-shaped portion provided on the first piezoelectric element and contacting an outer side surface of the first frame, deformation of the first piezoelectric element causing the first rod-shaped portion to drive the first frame in a first direction.

3. The piezoelectric optical anti-shake mechanism according to claim 2, wherein the second piezoelectric driving means includes a second piezoelectric element provided at an inner side wall of a third frame, and a second rod-shaped portion provided on the second piezoelectric element and contacting an outer side surface of the second frame, the deformation of the second piezoelectric element causing the second rod-shaped portion to drive the second frame in a second direction.

4. The piezoelectric optical anti-shake mechanism according to claim 1, wherein a permanent magnet is provided on an outer side of the lens support portion, a driving coil is provided on an inner side surface of the first frame at a position corresponding to a position where the permanent magnet is provided, and movement of the lens support portion with respect to the first frame is controlled by controlling a current supplied to the driving coil.

5. The piezoelectric optical anti-shake mechanism according to claim 1, wherein the first piezoelectric drive is located on a first side of the optical anti-shake mechanism and the second piezoelectric optical anti-shake mechanism is located on a second side of the optical anti-shake mechanism adjacent to the first side.

6. The piezoelectric optical anti-shake mechanism according to claim 5, wherein a first ball is provided between the first frame and the second frame on a third side of the optical anti-shake mechanism, the third side being opposite to the first side.

7. The piezoelectric optical anti-shake mechanism according to claim 6, wherein the first balls comprise two sets of balls, each set comprising three balls in the optical axis direction, and a V-shaped groove is provided on the second frame to accommodate the balls.

8. The piezoelectric optical anti-shake mechanism according to claim 5 or 6, wherein a second ball is disposed between the second frame and the third frame on a fourth side of the optical anti-shake mechanism, the fourth side being opposite to the second side.

9. The piezoelectric optical anti-shake mechanism according to claim 8, wherein the second balls comprise two sets of balls, each set of balls comprising three balls in the optical axis direction, and V-grooves are provided on the third frame to accommodate the balls.

10. The piezoelectric optical anti-shake mechanism according to any one of claims 1 to 7 and 9, further comprising first direction position detection means and second direction position detection means,

the first direction position detection means is provided in the vicinity of the first piezoelectric drive means for detecting a change in position of the lens support section in the first direction,

the second-direction position detecting means is provided in the vicinity of the second piezoelectric driving means for detecting a change in position of the lens support section in the second direction.