CN113985564A - Drive module, camera module and electronic equipment - Google Patents
Drive module, camera module and electronic equipment Download PDFInfo
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- CN113985564A CN113985564A CN202010653873.8A CN202010653873A CN113985564A CN 113985564 A CN113985564 A CN 113985564A CN 202010653873 A CN202010653873 A CN 202010653873A CN 113985564 A CN113985564 A CN 113985564A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/682—Vibration or motion blur correction
- H04N23/685—Vibration or motion blur correction performed by mechanical compensation
- H04N23/687—Vibration or motion blur correction performed by mechanical compensation by shifting the lens or sensor position
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The application provides a drive module, a camera module and an electronic device. The driving module comprises a first bracket, a second bracket, a fixed base and two piezoelectric driving motors, wherein the second bracket is used for mounting a driven piece; one piezoelectric driving motor is fixed on the fixed base, and the power output end of the piezoelectric motor is connected with the first support in a driving mode so as to drive the first support to rotate around a first direction relative to the fixed base; the other piezoelectric driving motor is fixed on the first support, and the power output end of the piezoelectric motor is connected with the second support in a driving mode so as to drive the second support to rotate around the second direction relative to the first support; the first direction is perpendicular to the second direction. The driving module is applied to the camera module, and the whole driving module can enable the optical element of the camera module to have a two-degree-of-freedom motion mode, so that a good anti-shake effect can be achieved.
Description
Technical Field
The application relates to the technical field of terminals, in particular to a driving module, a camera module and electronic equipment.
Background
The camera lens is an important part of electronic equipment such as a mobile phone and a tablet personal computer, and is used for photographing or shooting, and the quality of the photographing quality directly affects the use experience of a customer. With the development of science and technology and the increasing requirements of consumers on the shooting and image pick-up functions of the camera, the camera with the optical anti-shake and automatic focusing functions is widely applied to terminal equipment.
The optical anti-shake or auto-focus function generally utilizes a driving module to drive an optical assembly to perform directional translation or rotational motion, so as to change the distance or angle between the optical assembly and an optical image sensor, thereby obtaining the best photographing or image capturing effect. The driving module can be selected from a voice coil motor, a memory alloy motor and a piezoelectric motor. Since the piezoelectric motor technology has the advantages of small structure, large thrust, flexible design, self-locking, high stepping precision, low electromagnetic radiation and the like, the piezoelectric motor becomes the most common driving structure at present and is applied to more fields.
However, the current piezoelectric motor driving module can only realize the translational motion of the driving optical component, and can not realize the two-degree-of-freedom motion.
Disclosure of Invention
The application provides a drive module, a camera module and an electronic device, which are used for driving a driven part (such as an optical element in the camera module) to realize two-degree-of-freedom and non-simultaneous shift motion so as to obtain a better anti-shake effect.
In a first aspect, the present application provides a driving module, which may be applied to a camera module, and specifically may be used to drive an optical element in the camera module to move; the driving module comprises a first bracket, a second bracket, a fixed base and two piezoelectric driving motors, wherein the second bracket is used for mounting a driven piece (such as an optical element in a camera module); the first support can rotate around a first direction relative to the fixed base, the second support can rotate around a second direction relative to the first support, and the first direction is perpendicular to the second direction; the two piezoelectric driving motors can be specifically a first piezoelectric driving motor and a second piezoelectric driving motor, the first support is driven by the first piezoelectric driving motor, the second support is driven by the second piezoelectric driving motor, and the first piezoelectric driving motor and the second piezoelectric driving motor have the same structure; specifically, a first piezoelectric driving motor is fixed on the fixed base, and a power output end is in driving connection with the first support; the first piezoelectric driving motor and the second piezoelectric driving motor can respectively control the first support and the second support to move, so that the driven part can be driven to realize two-degree-of-freedom non-simultaneous shaft shifting movement.
The driving module is applied to the camera module, the whole driving module can enable the optical element of the camera module to have a two-degree-of-freedom motion mode, and the optical element can have the possibility of multiple motions by controlling the first piezoelectric driving motor and the second piezoelectric driving motor to work in a coordinated mode, so that a better anti-shaking effect can be obtained.
The first piezoelectric driving motor and the second piezoelectric driving motor have the same structure, and any one piezoelectric driving motor comprises a base, a rudder shaft, a driven shaft and two groups of piezoelectric driving components; the two groups of piezoelectric driving components are fixed on the base, the two groups of piezoelectric driving components clamp the fixed rudder shaft to drive the rudder shaft to swing, the driven shaft is connected with the rudder shaft, and the axial lead of the driven shaft penetrates through the swing center of the rudder shaft; for the first piezoelectric driving motor, the first support is driven by the first piezoelectric driving motor, so that a driven shaft of the first support is connected with the first support, and the two groups of piezoelectric driving components are matched with the driving rudder shaft to swing so as to drive the driven shaft to rotate and drive the first support to rotate relative to the fixed base; for the second piezoelectric driving motor, the second piezoelectric driving motor is used for driving the second support, so that the driven shaft of the second piezoelectric driving motor is connected with the second support, and the two groups of piezoelectric driving components are matched with the driving rudder shaft to swing so as to drive the driven shaft to rotate and drive the second support to rotate relative to the first support.
Each group of piezoelectric driving components comprises a flexible hinge structure and a piezoelectric stack; in any group of piezoelectric driving components, the flexible hinge structure is provided with an abutting part and a cantilever part corresponding to the abutting part, and the cantilever part is used for abutting against a rudder shaft; the piezoelectric stack is fixed on the base and is abutted against the abutting part. When the piezoelectric stack works to output power, the abutting part generates structural deformation, the deformation of the abutting part drives the cantilever part to move, and the cantilever part drives the rudder shaft to swing. In the working process, the working parameters of the piezoelectric stacks in the two groups of piezoelectric driving components are controlled, so that the rudder shaft can be driven to swing by a set angle according to a set direction.
In a possible implementation manner, each group of piezoelectric driving components may further include a pre-pressing elastic sheet, and the pre-pressing elastic sheet may provide a pre-tightening force for the piezoelectric stack; in any group of piezoelectric driving components, the pre-pressing elastic sheet is arranged between the piezoelectric stack and the base.
In a possible implementation manner, the flexible hinge structures in the two groups of piezoelectric driving components have an integrated structure, which is beneficial to simplifying the process.
In order to precisely control the driving mode of the driving module, the driving module is further provided with a first detection component for detecting the rotation angle of the first bracket relative to the fixed base, and a second detection component for detecting the rotation angle of the second bracket relative to the first bracket. In the working process, the working parameters of the first piezoelectric driving motor and the second piezoelectric driving motor are controlled to be adjusted through the detection information fed back by the first detection assembly and the second detection assembly, and a better and more stable driving mode can be obtained.
In a mode that probably realizes, first detection component includes first sensor and first detection magnetite, and wherein, first sensor is installed in fixed baseplate, and first detection magnetite is installed in first support, and when first support is rotatory relatively fixed baseplate, first detection magnetite is rotatory along with first support, and first sensor can sense the position change of first detection magnetite to obtain the rotation angle change of first support relatively fixed baseplate.
Correspondingly, the second detection assembly comprises a second sensor and a second detection magnet, wherein the second sensor is installed on the first support, the second detection magnet is installed on the second support, when the second support rotates relative to the first support, the second detection magnet rotates along with the second support, and the second sensor can sense the position change of the second detection magnet, so that the rotation angle change of the second support relative to the first support is obtained.
In a second aspect, the present application further provides a camera module, which may include an optical element and any one of the driving modules, and the optical element is mounted on the second support of the driving module, so that the optical element can be driven to realize two-degree-of-freedom and asynchronous shift motion, thereby providing more possibilities for the motion of the optical element, obtaining a better anti-shake effect, and further improving the camera effect.
The third aspect, this application still provides an electronic equipment, and this electronic equipment's equipment body is provided with the above-mentioned module of making a video recording, has the function of making a video recording of shooing, because the module of making a video recording has better shooting effect, can bring better use for the consumer and experience.
Drawings
Fig. 1 is a schematic structural diagram of a driving module according to an embodiment of the present disclosure;
fig. 2 is an exploded view of a driving module according to an embodiment of the present disclosure;
fig. 3 is a schematic view of an application state of a driver module according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a control principle of a driving module in application according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of another driving module provided in the embodiment of the present application;
fig. 6 is an exploded view of another driving module provided in the embodiments of the present application;
fig. 7 is a schematic view of an application state of another driving module according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a first piezoelectric driving motor in a driving module according to an embodiment of the present disclosure;
fig. 9 is an exploded view of a first piezoelectric driving motor in a driving module according to an embodiment of the present disclosure;
fig. 10 is a schematic diagram illustrating an operation principle of a first piezoelectric driving motor in a driving module according to an embodiment of the present disclosure;
fig. 11 is a schematic structural diagram of a camera module according to an embodiment of the present application.
Reference numerals: 100-a camera module; 10-a drive module; 1-a first scaffold; 11-a first substrate; 12-a first side panel; 2-a second scaffold; 21-a second substrate; 22-a second side panel; 23-fixing the plate; 3-fixing the base; 31-a base plate; 32-a mounting plate; 33-fixing the side plate; 41-a first piezo-electric drive motor; 411-a first stator; 412-a first power take-off shaft; 412' -a first auxiliary power take-off shaft; 42-a second piezo-electric drive motor; 421-a second stator; 422-second power take-off shaft; 422' -a second auxiliary power take-off shaft; 401-a base; 402-rudder shaft; 403-a piezoelectric drive component; 404-prepressing the elastic sheet; 405-a driven shaft; 4031-flexible hinge structure; 4032-piezoelectric stack; 51-a first detection assembly; 511-a first sensor; 512-first detection magnet; 52-a second detection assembly; 521-a second sensor; 522-a second detection magnet; 61-a first bearing; 61' -a first auxiliary bearing; 62-a second bearing; 62' -a second auxiliary bearing; 7-a driven member; 8-a control unit; 9-optical lens.
Detailed Description
Firstly, an application scene of the application is introduced, and the driving module is an important structure in the camera module and is mainly used for driving an optical component in the camera module to move so as to realize functions of optical anti-shake, automatic focusing and the like, thereby meeting requirements of photographing or camera shooting on picture quality. The driving module used for driving the optical component to move in the existing camera module can only drive the optical component to move in a translation mode, and cannot drive the optical component to move in two degrees of freedom or multiple degrees of freedom. Based on this, the embodiment of the present application provides a driving module, which is used for driving an optical component to implement two-degree-of-freedom and non-simultaneous shift motion.
In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings. The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of this application and the appended claims, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, such as "one or more", unless the context clearly indicates otherwise.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
Referring to fig. 1, a structure of a driving module 10 provided in an embodiment of the present application is shown, where the driving module 10 includes a first bracket 1, a second bracket 2, a fixed base 3, and two piezoelectric driving motors (i.e., a first piezoelectric driving motor 41 and a second piezoelectric driving motor 42); when being installed, the first piezoelectric driving motor 41 is fixed on the fixed base 3, and the power output end of the first piezoelectric driving motor 41 is connected to the first bracket 1 in a driving manner, where the power output end of the first piezoelectric driving motor 41 extends along the first direction (i.e. the X direction) shown in fig. 1, so that the first piezoelectric driving motor 41 can drive the first bracket 1 to rotate around the X direction relative to the fixed base 3; the second piezoelectric driving motor 42 is fixed to the first frame 1, and a power output end of the second piezoelectric driving motor 42 is drivingly connected to the second frame 2, where the power output end of the second piezoelectric driving motor 42 extends along a second direction (i.e. Y direction) shown in fig. 1, so that the second piezoelectric driving motor 42 can drive the second frame 2 to rotate around the Y direction relative to the first frame 1, and the Y direction is perpendicular to the X direction.
In order to accurately control the motion state of the driven element, the driving module 10 further includes a first detecting component 51 for detecting the rotation angle of the first bracket 1 relative to the fixed base 3 and a second detecting component 52 for detecting the rotation angle of the second bracket 2 relative to the first bracket 1, but due to the structural obstruction, only a first sensor 511 in the first detecting component 51 is shown in fig. 1, and in order to fully embody the structure of each part in the driving module 10, the exploded view of the driving module 10 shown in fig. 2 can be referred to.
As shown in fig. 2, the fixed base 3 is composed of a bottom plate 31 and a mounting plate 32 vertically fixed to the bottom plate 31, the bottom plate 31 and the mounting plate 32 constituting a space for accommodating the first bracket 1; the first piezoelectric driving motor 41 includes a first stator 411 and a first power output shaft 412, the first stator 411 is fixed on the fixed base 3, the first power output shaft 412 is the power output end of the first piezoelectric driving motor 41, and the axial line of the first power output shaft 412 is parallel to the X direction; when the motor is installed, the first stator 411 is fixed on the mounting plate 32 of the fixed base 3, and the first power output shaft 412 penetrates through the mounting plate 32 to be in transmission connection with the first bracket 1; the fixed base 3 is further provided with a first bearing 61 matched with the first power output shaft 412, so that the rotation stability of the first power output shaft 412 can be improved. When the first piezoelectric driving motor 41 is started, the first power output shaft 412 can drive the first bracket 1 to rotate around the X direction relative to the fixed base 3.
The first bracket 1 comprises a first base plate 11 and two first side plates 12 symmetrically arranged at two sides of the first base plate 11, the first base plate 11 is parallel to the mounting plate 32 of the fixed base 3, the two first side plates 12 are perpendicular to the first base plate 11, and a space for mounting the second bracket 2 is formed between the two first side plates 12 and the first base plate 11; the second piezoelectric driving motor 42 includes a second stator 421 and a second power output shaft 422, the second stator 421 is used for being fixed to the first bracket 1, the second power output shaft 422 is a power output end of the second piezoelectric driving motor 42, and an axial line of the second power output shaft 422 is parallel to the Y direction; when the motor is installed, the second stator 421 is fixed on one of the first side plates 12 of the first bracket 1, and the second power output shaft 422 passes through the first side plate 12 and is in transmission connection with the second bracket 2; the first bracket 1 is also provided with a second bearing 62 matched with the second power output shaft 422, so that the rotation stability of the second power output shaft 422 can be improved. When the second piezoelectric driving motor 42 is started, the second power output shaft 422 can drive the second frame 2 to rotate around the Y direction relative to the first frame 1. As shown in fig. 2, based on the structure of the first base plate 11 and the two first side plates 12 in the first bracket 1, in order to improve the motion stability of the second bracket 2, a second auxiliary power output shaft 422 'collinear with the second power output shaft 422 may be provided on the first side plate 12 to which the second stator 421 is not fixed, the second auxiliary power output shaft 422' is pivoted with the second bracket 2, and a second auxiliary bearing 62 'matched with the second auxiliary power output shaft 422' is further provided on the first side plate 12.
The first detecting component 51 for detecting the rotation angle of the first bracket 1 relative to the fixed base 3 includes a first sensor 511 and a first detecting magnet 512, the first sensor 511 is installed on the fixed base 3, the first detecting magnet 512 is installed on the first bracket 1, electromagnetic induction can be generated between the first sensor 511 and the first detecting magnet 512, when the first detecting magnet 512 rotates relative to the fixed base 3 along with the first bracket 1, the first sensor 511 can obtain the rotation angle of the first bracket 1 relative to the fixed base 3 through the change of the electromagnetic induction.
Referring to fig. 2, the second bracket 2 includes a second base plate 21, a fixing plate 23 and two second side plates 22 symmetrically disposed at two sides of the second base plate 21, the second base plate 21 and the fixing plate 23 are perpendicular to each other, the two second side plates 22 are perpendicular to the second base plate 21 and the fixing plate 23, respectively, and the second base plate 21, the fixing plate 23 and the two second side plates 22 form a space for installing a driven member; the second piezoelectric driving motor 42 comprises a second stator 421 and a second power output shaft 422, the second stator 421 is used for being fixed on the first bracket 1, the second power output shaft 422 is a power output end of the second piezoelectric driving motor 42, and the axis line of the second transmission shaft 422 is parallel to the Y direction; when the motor is installed, the second stator 421 is fixed on one of the first side plates 12 of the first bracket 1, and the second power output shaft 422 passes through the first side plate 12 and is in transmission connection with the second bracket 2; the first bracket 1 is also provided with a second bearing 62 matched with the second power output shaft 422, so that the rotation stability of the second power output shaft 422 can be improved. When the second piezoelectric driving motor 42 is activated, the second shaft 422 can drive the second frame 2 to rotate around the Y direction relative to the first frame 1. As shown in fig. 2, based on the structure of the first base plate 11 and the two first side plates 12 in the first bracket 1, in order to improve the motion stability of the second bracket 2, a second auxiliary power output shaft 422 'that is coaxial with the second power output shaft 422 may be disposed on the first side plate 12 to which the second stator 421 is not fixed, the second auxiliary power output shaft 422' is pivotally connected to the second bracket 2, and a second auxiliary bearing 62 'that is matched with the second auxiliary power output shaft 422' is further disposed on the first side plate 12.
The second detecting component 52 for detecting the rotation angle of the second bracket 2 relative to the first bracket 1 includes a second sensor 521 and a second detecting magnet 522, the second sensor 521 is mounted on the first bracket 1, the second detecting magnet 522 is mounted on the second bracket 2, electromagnetic induction can be generated between the second sensor 521 and the second detecting magnet 522, and when the second detecting magnet 522 rotates relative to the first bracket 1 along with the second bracket 2, the second sensor 521 can obtain the rotation angle of the second bracket 2 relative to the first bracket 1 through the change of the electromagnetic induction.
According to the above embodiment, the rotation direction of the first carriage 1 is perpendicular to the X direction, and the rotation direction of the second carriage 2 is perpendicular to the Y direction; as shown in fig. 3, the driving module 10 can be applied to drive other driven members 7, the second bracket 2 is mounted on the first bracket 1, when the first piezoelectric driving motor 41 (not shown here) works, the first bracket 1 rotates with the first power output shaft 412 of the first piezoelectric driving motor 41, and drives the second bracket 2 and the driven members 7 to rotate together around the axial center line of the first power output shaft 412 (i.e. the direction parallel to X); the driven member 7 is mounted on the second support 2, and when the second piezoelectric driving motor 42 operates, the second support 2 rotates with the second power output shaft 422 of the second piezoelectric driving motor 42, and drives the driven member 7 to rotate together around the axial center line of the second power output shaft 422 (i.e. the direction parallel to Y). The entire drive module 10 can be such that the driven member 7 has a two degree of freedom motion pattern.
In practical application of the driving module 10, for example, the driving module 10 is applied to a camera module, as shown in fig. 4, the camera module has a control unit 8, the control unit 8 can control two piezoelectric driving motors, the first sensor 511 can feed back the detected rotation angle of the first support 1 relative to the fixed base 3 to the control unit 8, the second sensor 521 can feed back the detected rotation angle of the second support 2 relative to the first support 1 to the control unit 8, the control unit 8 controls the first piezoelectric driving motor 41 to drive the first support 1 to rotate in the direction perpendicular to the X direction and controls the second piezoelectric driving motor 42 to drive the second support 2 to rotate in the direction perpendicular to the Y direction relative to the first support 1 according to the movement requirement of the driven member 7, when the first support 1 rotates relative to the fixed base 3, the first sensor 511 can cooperate with the first detecting magnet 512 to detect the rotation degree of the first support 1 relative to the fixed base 3, when the second holder 2 rotates relative to the first holder 1, the second sensor 521 may detect the degree of rotation of the second holder 2 relative to the first holder 1 in cooperation with the second detection magnet 522. Therefore, the first detection component 51 and the second detection component 52 can be matched to accurately monitor the motion states of the first support 1 and the second support 2, so that the control unit 8 can conveniently and accurately control the first piezoelectric driving motor 41 and the second piezoelectric driving motor 42, and the camera module can obtain a better and more stable shooting effect.
It will be appreciated that the fixed base 3 and the first bracket 1 shown in fig. 1 to 3 have a clearance therebetween, which is capable of allowing rotation of the first bracket 1 relative to the fixed base 3 about the first power take-off shaft 412; accordingly, the first bracket 1 and the second bracket 2 also have a gap therebetween, which can allow the second bracket 2 to rotate about the second power take-off shaft 422 relative to the fixed base 3.
Similar to the structure of the driving module 10 shown in fig. 1 to 3, the embodiment of the present application further provides a driving module 10 as shown in fig. 5 and 6, where the driving module 10 includes a first support 1, a second support 2, a fixed base 3, and two piezoelectric driving motors (i.e., a first piezoelectric driving motor 41 and a second piezoelectric driving motor 42), where a first detecting component 51 and a second detecting component 52 are not shown; fig. 5 shows an exploded view of the driving module 10, where the structure of the first bracket 1 is similar to that of the first bracket 1 in fig. 2, and the structure of the second bracket 2 is similar to that of the second bracket 2 in fig. 2, except that the fixing base 3 includes a bottom plate 31 and two fixing side plates 33 perpendicular to the bottom plate 31, the first stator 411 of the first piezoelectric driving motor 41 is fixed to one of the fixing side plates 33, the first power output shaft 412 passes through the fixing side plate 33 to be connected to the first bracket 1, and the axial line of the first power output shaft 412 is parallel to the Y direction; the first bearing 61 matched with the first power output shaft 412 is further arranged on the fixed side plate 33, so that the rotation stability of the first power output shaft 412 can be improved. Based on the structure of the bottom plate 31 and the two fixed side plates 33 in the fixed base 3, in order to improve the motion stability of the first bracket 1, a first auxiliary power output shaft 412 'collinear with the first power output shaft 412 may be disposed on the fixed side plate 33 to which the first stator 411 is not fixed, the first auxiliary power output shaft 412' is pivoted with the first bracket 1, and a first auxiliary bearing 61 'matched with the first auxiliary power output shaft 412' is further disposed on the fixed side plate 33; the first base plate 11 of the first bracket 1 is parallel to the axial direction of the first power output shaft 412, the two first side plates 12 correspond to the two fixed side plates 33 of the fixed base 3, respectively, one of the first side plates 12 is connected with the first power output shaft 412, and the other first side plate 12 is pivoted with the first auxiliary power output shaft 412', so that the first bracket 1 can rotate along the direction perpendicular to the Y direction along with the first power output shaft 412 relative to the fixed base 3; the second stator 421 of the second piezoelectric driving motor 42 is fixed on the first base plate 11 of the first bracket 1, the second power output shaft 422 passes through the first base plate 11 to be connected with the second bracket 2, and the first base plate 11 is provided with a second bearing 62 for matching the second power output shaft 422; the second base plate 21 of the second bracket 2 is coupled to the second power take-off shaft 422 so that the second bracket 2 can rotate with the second power take-off shaft 422 in a direction perpendicular to the X direction.
Of course, such a driving module 10 can also be used to drive the driven member 7, as shown in fig. 7, the second frame 2 is mounted on the first frame 1, and when the first piezoelectric driving motor 41 (not shown here) works, the first frame 1 rotates along with the first power output shaft 412 of the first piezoelectric driving motor 41 along the direction perpendicular to the Y direction, and drives the second frame 2 and the driven member 7 to rotate together around the axial line of the first power output shaft 412 (i.e. the direction parallel to the Y direction); the driven member 7 is mounted on the second support 2, when the second piezoelectric driving motor 42 operates, the second support 2 rotates with the second power output shaft 422 of the second piezoelectric driving motor 42 to drive the driven member 7 to rotate together around the axial line of the second power output shaft 422 (i.e. the direction parallel to X), and the whole driving module 10 can enable the driven member 7 to have a two-degree-of-freedom non-simultaneous shaft moving motion mode.
In a possible way of realisation, the first piezoelectric drive motor 41 and the second piezoelectric drive motor 42 have the same structure and are both powered by piezoelectric drives. Taking the first piezoelectric driving motor 41 as an example, as shown in the structure of the first piezoelectric driving motor 41 shown in fig. 8 and the exploded view of the first piezoelectric driving motor 41 shown in fig. 9, the first piezoelectric driving motor 41 includes a base 401, a steering shaft 402, a driven shaft 405, and two sets of piezoelectric driving components 403, where the base 401 corresponds to the first stator 411 in the first piezoelectric driving motor 41, that is, the base 401 is fixed to the fixed base 3; the driven shaft 405 corresponds to a first power output shaft 412 in the first piezoelectric driving motor 41 and is in driving connection with the first bracket 1 when in use; the two sets of piezoelectric driving assemblies 403 are respectively arranged on two sides of the rudder shaft 402, one end of each set of piezoelectric driving assemblies 403 is fixed on the base 401, and the other end of each set of piezoelectric driving assemblies 403 is abutted against the rudder shaft 402, so that the two sets of piezoelectric driving assemblies 403 can clamp and fix the rudder shaft 402 as shown in fig. 7, and the two sets of piezoelectric driving assemblies 403 are controlled to drive the rudder shaft 402 to swing, so that the rudder shaft 402 swings to drive the driven shaft 405 to rotate, thereby driving the first support 1 to rotate relative to the fixed base 3.
With continued reference to fig. 8 and 9, each set of piezoelectric drive assemblies 403 includes a flexible hinge structure 4031 and a piezoelectric stack 4032, and two flexible hinge structures 4031 in two sets of piezoelectric drive assemblies 403 may have an integral structure. Taking the piezoelectric driving assembly 403 on the right side shown in fig. 8 as an example, one end of the piezoelectric stack 4032 is fixed to the base 401, and a pre-pressing elastic sheet 404 is disposed between the piezoelectric stack 4032 and the base 401, and the pre-pressing elastic sheet 404 can provide a pre-tightening force for the piezoelectric stack 4032; the flexible hinge structure 4031 has an abutting portion a and a cantilever portion B corresponding to the abutting portion a, the abutting portion a in fig. 8 has a hollow structure, and is deformed when a force is applied, and the deformation can change the position of the cantilever portion B; corresponding to the two groups of piezoelectric driving assemblies 403 in fig. 8, the two cantilever portions B of the two flexible hinge structures 4031 clamp and fix the rudder shaft 402 (specifically, the rudder shaft 402 may be fixed between the two cantilever portions B by gluing), and the piezoelectric stacks 4032 in the two groups of piezoelectric driving assemblies 403 are activated as required, so that the rudder shaft 402 can be driven to swing in a set direction by a set angle. It should be understood that the structure of the flexible hinge structure 4031 in fig. 8 is only an example, and other implementations of the structure are possible as long as the effect of generating deformation under the driving of the piezoelectric stack 4032 to swing the rudder shaft 402 can be achieved, and the structure is not illustrated here.
In a specific use, the rudder shaft 402 of the first piezoelectric driving motor 41 shown in fig. 8 is connected to the driven shaft 405, and the driven shaft 405 is drivingly connected to the first bracket 1. Referring to fig. 8, it can be seen that a jack C for matching with the rudder shaft 402 is provided on the driven shaft 405, and when the rudder shaft 402 is installed in a matching manner, the rudder shaft 402 is inserted into the jack C, and when the rudder shaft 402 is driven to swing, the first power output shaft 412 can be driven to rotate; here, the swing center of the rudder shaft 402 needs to be located on the axial center line of the driven shaft 405, so that the swing of the rudder shaft 402 can drive the driven shaft 405 to rotate around the axial center line of the driven shaft 405.
For example, referring to fig. 10, taking the right piezoelectric driving component 403 as an example, setting that the piezoelectric stack 4032 starts to apply a force in a direction shown in a to the flexible hinge structure 4031, the abutting portion a of the flexible hinge structure 4031 generates a deformation that compresses downward, and the cantilever portion B generates a swing in a direction shown in B in the deformation process of the abutting portion a, so as to drive the rudder shaft 402 to generate a swing in a direction shown in c, and the swing of the rudder shaft 402 drives the driven shaft 405 to rotate in a direction shown in fig. 10; the operating parameters of the piezoelectric stack 4032 are controlled, and the swing angle of the rudder shaft 402 can be controlled. During this process, the left piezoelectric drive assembly 403 is not activated. It will be understood that when the left piezoelectric driving element 403 is driven and the right piezoelectric driving element 403 is not activated, the rudder shaft 402 can be driven to swing in the direction opposite to the direction c shown in fig. 10, which is not shown in the figure. It can be seen that, in the working process, as long as the working parameters of the two piezoelectric stacks 4032 are precisely controlled, the rudder shaft 402 can be controlled to swing in the required direction and angle, and further the driven shaft 405 is driven to rotate by the set angle in the required direction.
It should be understood that fig. 8 to 10 describe the piezoelectric driving motor in the driving module 10 provided in the embodiment of the present application by taking the first piezoelectric driving motor 41 as an example, and the structure of the second piezoelectric driving motor 42 is the same as that of the first piezoelectric driving motor 41, except that in use, the steering shaft 402 is connected with the second power output shaft 422 of the second piezoelectric driving motor 42 to drive the second power output shaft 422 to rotate according to a required direction and angle, which will not be described herein.
Based on the driving module 10 provided in the foregoing embodiment, an image capturing module 100 is further provided in the embodiment of the present application, as shown in fig. 11, and includes an optical element and any one of the driving modules 10, where the optical element may be an optical lens 9, and taking the driving module 10 shown in fig. 1 as an example, the optical lens 9 is installed in the second bracket 2 in the driving module 10; the first piezoelectric driving motor 41 and the second piezoelectric driving motor 42 cooperate to drive the second support 2 to rotate in two degrees of freedom, so as to drive the optical lens 9 to realize two-degree of freedom and non-simultaneous shift motion, thereby providing more possibilities for the motion of the optical lens 9; in this process, the first detection assembly 51 and the second detection assembly 52 (only the first sensor 511 in the first detection assembly 51 is shown in fig. 11 due to the limited viewing angle) can respectively detect the movement of the first support 1 and the second support 2, precisely control the first piezoelectric driving motor 41 and the second piezoelectric driving motor 42, and control the anti-shake to achieve the effect of stabilizing the image.
In addition, an embodiment of the present application further provides an electronic device, where the electronic device has the camera module 100, and can perform photographing and shooting (the electronic device may be a mobile phone, a tablet computer, a smart watch, and the like, and is not shown here by an illustration); when the electronic equipment is used for photographing, the optical device can realize two-degree-of-freedom and non-simultaneous shift movement, the anti-shaking effect is better, the photographed image is more stable and clear, and better use experience can be brought to consumers.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A drive module, comprising: the piezoelectric driving device comprises a first bracket, a second bracket, a fixed base and two piezoelectric driving motors, wherein the second bracket is used for mounting a driven piece;
one piezoelectric driving motor is fixed on the fixed base, and a power output end of the piezoelectric driving motor is in driving connection with the first support so as to drive the first support to rotate around a first direction relative to the fixed base;
the other piezoelectric driving motor is fixed on the first bracket, and a power output end of the piezoelectric driving motor is in driving connection with the second bracket so as to drive the second bracket to rotate around a second direction relative to the first bracket;
the first direction is perpendicular to the second direction.
2. The drive module of claim 1, further comprising a first detection assembly for detecting an angle of rotation of the first support relative to the fixed base and a second detection assembly for detecting an angle of rotation of the second support relative to the first support.
3. The drive module of claim 2, wherein the first sensing assembly includes a first sensor mounted to the stationary base and a first sensing magnet mounted to the first bracket.
4. The drive module according to claim 2 or 3, wherein the second detection member includes a second sensor and a second detection magnet, the second sensor being mounted to the first bracket, the second detection magnet being mounted to the second bracket.
5. The drive module according to any one of claims 1 to 4, wherein each of the piezoelectric drive motors comprises a base, a rudder shaft, a driven shaft, and two sets of piezoelectric drive components;
the two groups of piezoelectric driving components are fixed on the base and clamp the rudder shaft to drive the rudder shaft to swing; the rudder shaft is connected with the driven shaft, and the axis of the driven shaft passes through the swing center of the rudder shaft.
6. The drive module of claim 5, wherein each set of the piezoelectric drive components includes a flexible hinge structure and a piezoelectric stack;
in any group of the piezoelectric driving components, the flexible hinge structure is provided with an abutting part and a cantilever part corresponding to the abutting part, and the cantilever part is used for abutting against the rudder shaft;
the piezoelectric stack is fixed on the base, and the piezoelectric stack is abutted against the abutting part.
7. The drive module of claim 6 wherein the flexible hinge structures in both sets of piezoelectric drive components have a unitary structure.
8. The drive module according to claim 6 or 7, wherein each set of piezoelectric drive components further comprises a pre-stressed spring; in any group of the piezoelectric driving assemblies, the pre-pressing elastic sheet is arranged between the piezoelectric stack and the base.
9. A camera module comprising an optical element and a drive module according to any one of claims 1-8, wherein the optical element is secured to a second support of the drive module.
10. An electronic apparatus characterized by comprising an apparatus body provided with the camera module according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010653873.8A CN113985564A (en) | 2020-07-08 | 2020-07-08 | Drive module, camera module and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010653873.8A CN113985564A (en) | 2020-07-08 | 2020-07-08 | Drive module, camera module and electronic equipment |
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| CN113985564A true CN113985564A (en) | 2022-01-28 |
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| CN202010653873.8A Pending CN113985564A (en) | 2020-07-08 | 2020-07-08 | Drive module, camera module and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114827408A (en) * | 2022-04-13 | 2022-07-29 | Oppo广东移动通信有限公司 | Camera module and electronic equipment |
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2020
- 2020-07-08 CN CN202010653873.8A patent/CN113985564A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114827408A (en) * | 2022-04-13 | 2022-07-29 | Oppo广东移动通信有限公司 | Camera module and electronic equipment |
| CN114827408B (en) * | 2022-04-13 | 2024-04-26 | Oppo广东移动通信有限公司 | Camera module and electronic equipment |
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