CN211352077U

CN211352077U - Piezoelectric driving structure, camera lens and electronic device

Info

Publication number: CN211352077U
Application number: CN201921449505.0U
Authority: CN
Inventors: 谢俊; 付乾炎; 张戈; 郭利德
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-08-25
Anticipated expiration: 2029-08-30

Abstract

The application provides a piezoelectric driving structure, a camera lens and an electronic device, wherein the piezoelectric driving structure comprises a supporting component and a first resonator; the supporting component and the first resonator are matched to form a gap for accommodating the driven piece and limiting the moving path of the driven piece; the first resonator comprises a fixed part and two resonance parts respectively connected with the fixed part, each resonance part comprises a resonance body and a piezoelectric element which is arranged on the resonance body and can be controlled independently, and a contact part for contacting the driven part is formed on one side of the resonance body facing the supporting component; placing a driven member in a gap between the support component and the first resonator, and placing the driven member in the gap between the first resonator and the support component, wherein one resonant member is used for driving the driven member to move along a set direction, and the other resonant member is used for limiting the driven member not to deflect; the driven member can be driven to reciprocate by changing the pressurizing mode of the piezoelectric elements in the two resonant members.

Description

Piezoelectric driving structure, camera lens and electronic device

Technical Field

The application relates to the technical field of electronic equipment, in particular to a piezoelectric driving structure, a camera lens and electronic equipment.

Background

The camera lens is an important component 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. When the electronic device captures a long-distance object image, the camera lens needs to be zoomed to obtain a clear image of the object, and currently, the zooming modes include optical zooming and digital zooming.

Currently, in optical zooming, the focal length of a camera lens is changed by changing the relative position of each lens in the camera lens, so that zooming is realized, and the resolution and the image quality of images shot by the camera lens before and after optical zooming are not changed. In optical zooming, a driving structure is required to drive each lens group structure in the lens to move linearly, and at the present stage, a piezoelectric driver is generally adopted to realize the linear movement of the long stroke of the lens group. Fig. 1 shows a schematic diagram of a driving follower 20 of a conventional piezoelectric driving structure 10, in which the driving structure 10 includes a resonator 101 and a piezoelectric element 102, wherein the resonator 101 is a symmetrical structure and is divided into a first section 101a, two second sections 101b connected to two sides of the first section 101a, and two third sections 101c connected to ends of the two second sections 101b away from the first section 101 a; the first section 101a is used for being fixedly connected with other structures, the piezoelectric elements 102 are two and are respectively arranged on the third sections 101c, and the free ends M of the two third sections 101c are opposite to form a space for accommodating the driven member 20; when the driving structure works, a voltage with a certain frequency is applied to the piezoelectric element 102, the piezoelectric element 102 generates stretching deformation and transmits force to the third section 101c of the resonator 101, the resonator 101 vibrates, and then the free end 101c of the third section of the resonator 101 and the driven member 20 are mutually squeezed and rubbed, so that the driven member 20 is driven to move along a straight line; by adjusting the frequency of the voltage applied to the piezoelectric element 102 and changing the mode of the resonator 101, the linear reciprocating motion of the follower 20 can be realized, as shown in the reciprocating direction in fig. 1. In the driving structure 10, the follower 20 is located between the two third sections 101c of the resonator 101, and the driving structure 10 has a larger size compared with the follower 20 (if the follower 20 is larger in size, the driving structure 10 cannot realize driving); during operation, when the third section 101c of the resonator 101 is in a non-contact state with the follower 20, the follower 20 is not guided or positioned and limited, and deflection may occur to affect linear motion; in addition, in order to realize the linear reciprocating motion of the driven member 20, it is necessary to apply driving voltages of different frequencies to the piezoelectric element 102, so that the resonator 101 generates different vibration modes and amplitudes, and therefore, the mutual extrusion or friction state between the third section 101c of the resonator 101 and the driven member 20 is different, and further, the motion parameters such as the speed, the acceleration, and the like of the driven member 20 in the reciprocating motion are different, in this case, when the driven member 20 reciprocates in the same stroke, the response time is different, so that the driving structure 10 cannot satisfy the condition that the corresponding time for driving the driven member 20 to linearly reciprocate is kept consistent, and the stability of the motion of the driven member 20 is affected.

SUMMERY OF THE UTILITY MODEL

The application provides a piezoelectric driving structure, a camera lens and electronic equipment, so that when a driven piece is driven to do reciprocating motion, the driven piece has a stable motion state.

In a first aspect, the present application provides a piezoelectric driving structure comprising a support member and a first resonator, the support member and the first resonator being matched to form a gap therebetween, the gap being adapted to receive a driven member and to define a path of movement of the driven member; the first resonator comprises a fixed part and two resonance parts, the fixed part is used for being fixed on other structures of an application environment, and the two resonance parts are connected to the fixed part; each resonant piece specifically comprises a resonant body and a piezoelectric element which is arranged on the resonant body and is independently controllable, correspondingly, a contact part for contacting the driven piece is formed on one side of the resonant body facing the supporting component, when voltage is applied to the piezoelectric element, the piezoelectric element deforms to cause the resonant body to act, and the action of the resonant body is transmitted to the driven piece between the first resonator and the supporting component, so that the state of the driven piece is influenced; specifically, in each resonant piece, when a high-frequency voltage is applied to the piezoelectric element, the piezoelectric element generates a vibration shape to drive the resonant body to vibrate, and the vibration of the resonant body is acted on the driven piece through the contact part to drive the driven piece to move along a set direction according to a moving path defined by the supporting component and the first resonator; when the piezoelectric element is applied with stable voltage, the piezoelectric element deforms to drive the resonant body to approach the supporting component, so that the resonant body is contacted with the driven piece, and under the matching of the supporting component, the resonant body and the driven piece act together to limit the driven piece to move without deflection; in practical application, the first resonator and the support component are respectively arranged on two opposite sides of the driven member, high-frequency voltage can be applied to the piezoelectric element in one of the resonance pieces of the first resonator, and the resonance body in the resonance piece vibrates under the driving of the piezoelectric element, so that the contact part of the resonance body is in contact with and pressed against the driven member and generates friction, and the driven member is driven to move along a set direction according to a limited moving path; the piezoelectric element in the other resonant piece in the first resonator is applied with stable voltage, the resonant body in the resonant piece slightly presses the driven piece under the driving of the piezoelectric element, and under the matching of the supporting component, the resonant body and the supporting component simultaneously act on two sides of the moving direction of the driven piece so that the driven piece does not shift in the moving process; under the matching of the two resonant pieces of the first resonator and the supporting component, the driven piece can be driven to move linearly along a defined path; in addition, in the two resonance parts, the driving force generated by the vibration body of one resonance part when vibrating to the driven part and moving along the moving path is opposite to the driving force generated by the resonance body of the other resonance part when vibrating to the driven part and moving along the moving path, the mode of applying voltage to the piezoelectric element in the two resonance parts is changed according to the requirement, the moving direction of the driven part can be changed, and the mode of applying voltage to the piezoelectric element in the two resonance parts is changed according to a certain frequency, so that the linear reciprocating motion of the driven part according to the limited path can be realized. The fixed part and the two resonant parts in the first resonator are of an integrated structure for structural and operational stability.

On the basis, the fixing piece can be divided into a first fixing part and a second fixing part which are independently arranged, wherein one resonance piece is connected to the first fixing part, and the other resonance piece is connected to the second fixing part; the arrangement positions of the two resonance parts can be adjusted according to actual use requirements by the structure, and space is saved.

Specifically, the resonant body may include a straight section and a bent section, one end of the straight section is connected to the fixing member, and the other end of the straight section is connected to the bent section; the piezoelectric element is arranged on one side of the straight section, which is far away from the supporting component, and can drive the straight section to act when the piezoelectric element is deformed by applying voltage; the bending section of the resonance body is provided with a bulge facing the supporting component to form the contact part, and when the straight section acts, the action amplitude of the straight section is amplified by the bending section positioned at the end part of the straight section, so that the contact part can contact the driven piece along with the action of the straight section to influence the state of the driven piece.

Because the contact part is formed by the protrusion of the bending section, the bending section can be bent along the direction that the straight section is far away from the fixed part to form the protrusion, and the projection of the contact part formed by the protrusion on the supporting component is not overlapped with the projection of the straight section on the supporting component; or the bent section can be bent along the direction that the straight section is close to the fixing part to form a protrusion, and the projection of the contact part formed by the protrusion on the supporting component is overlapped with the projection of the straight section on the supporting component.

In a possible implementation, the support assembly may be a second resonator identical to the first resonator, the second resonator thus also comprising a fixed part and two resonant parts connected to the fixed part; and the second resonator and the first resonator are symmetrically arranged with respect to the above-mentioned gap for accommodating the follower, the two resonators of the first resonator are also symmetrical with respect to the above-mentioned gap for accommodating the follower with respect to the two resonators of the second resonator, and the follower can be driven by the cooperation of the first resonator and the second resonator. For example, a high-frequency voltage is applied to the piezoelectric element of one of the first resonators, and a high-frequency voltage is applied to the piezoelectric element of one of the second resonators corresponding to the resonator to which the high-frequency voltage is applied, the two resonators driving the driven member to move in the set direction along the movement path; and applying a stable voltage to the piezoelectric element of the other resonance piece in the first resonator, and simultaneously applying a stable voltage to the piezoelectric element of the other resonance piece corresponding to the resonance piece applied with the stable voltage in the first resonator in the second resonator, wherein the two resonance pieces apply slight pressure to the driven piece on two sides of the driven piece so as to prevent the driven piece from shifting in the moving process.

On the basis of the above-mentioned supporting component structure, a first resonator and a second resonator are taken as a group of resonant components, the piezoelectric driving structure may include a plurality of groups of resonant components, in each group of resonant components, the first resonator and the second resonator are symmetrically arranged on both sides of the gap for accommodating the driven member as described above; the multiple groups of resonance assemblies are arranged according to the set path, each group of resonance assemblies can drive the driven piece to reciprocate along a set direction, and the driven piece can realize compound motion under the combined action of the multiple resonance assemblies.

In another possible implementation, the support assembly may include a support for cooperating with the first resonator to form a gap for accommodating the follower and for defining a path of movement of the follower; in particular, the support has a support surface parallel to the above-mentioned set direction, limiting the movement of the follower in the plane of the support surface. Further, a guide groove may be formed on the support surface to directly define a moving path of the follower.

In a second aspect, the present application further provides a camera lens, which includes a lens, a lens holder, and any one of the piezoelectric driving structures; the lens is arranged on the lens support, the lens support is equivalent to a driven piece driven by the piezoelectric driving structure, and the position of the lens can be adjusted by driving the lens support through the piezoelectric driving structure, so that the focal length of a camera lens is changed, and optical zooming is realized.

In a third aspect, the present application further provides an electronic device, in which the camera lens is disposed on a device body of the electronic device, so that shooting operation can be performed. The optical zooming effect of the camera lens is stable, so that the camera lens is favorable for optimizing the shooting effect and brings better use experience for users.

Drawings

Fig. 1 is a schematic structural diagram of a piezoelectric actuator in the prior art;

fig. 2 is a schematic structural diagram of a piezoelectric driving structure according to an embodiment of the present disclosure;

fig. 3 is a schematic usage state diagram of a piezoelectric driving structure according to an embodiment of the present disclosure;

fig. 4 is a schematic usage state diagram of a piezoelectric driving structure according to an embodiment of the present disclosure;

fig. 5 is a schematic perspective view of a first resonator in a piezoelectric driving structure according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a first resonator in a piezoelectric driving structure according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a first resonator in a piezoelectric driving structure according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a first resonator in a piezoelectric driving structure according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a first resonator in a piezoelectric driving structure according to an embodiment of the present disclosure;

fig. 10 is a schematic diagram illustrating a usage state of a first resonator in a piezoelectric driving structure according to an embodiment of the present application;

fig. 11 is a schematic usage state diagram of a piezoelectric driving structure according to an embodiment of the present disclosure;

fig. 12 is a schematic usage state diagram of a piezoelectric driving structure according to an embodiment of the present disclosure;

fig. 13 is a schematic usage state diagram of a piezoelectric driving structure according to an embodiment of the present disclosure;

fig. 14 is a schematic usage state diagram of a piezoelectric driving structure according to an embodiment of the present disclosure;

fig. 15 is a schematic usage state diagram of a piezoelectric driving structure according to an embodiment of the present application.

Detailed Description

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.

First, an application scenario of the present application is introduced, in which when a photographing module of an electronic device (e.g., a mobile phone or a tablet computer) switches between a long-range view and a short-range view, a lens needs to be zoomed so as to obtain a clearer image. When optical zooming is adopted, the relative position of each lens in the lens needs to be adjusted, and in the driving process of a piezoelectric driver (shown in fig. 1) which is used for driving the lens to adjust the position of the lens at present, because a structure for limiting the moving direction of a driven part (namely the lens of the camera lens) is not provided, the driven part has the risk of deviating from the set direction; moreover, the piezoelectric driver realizes the reciprocating motion mode of the driven piece by changing the frequency of the driving voltage, and has the problem that the corresponding time of the driven piece cannot be kept consistent in the reciprocating motion process. Therefore, the embodiment of the present application provides a piezoelectric driving structure that can be applied to a camera lens to ensure that a driven member (which can be a lens of the camera lens) has a stable motion state when being driven to reciprocate.

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.

The piezoelectric driving structure provided by the embodiment of the present application includes a first resonator 1 and a supporting component 2, as shown in fig. 2, the first resonator 1 and the supporting component 2 are disposed opposite to each other, and a gap is formed therebetween, and in practical applications, the gap is used for accommodating a driven member (for example, the driven member may be a lens in a camera lens). The first resonator comprises a fixed part 11 and two resonance parts 12, the first resonator 1 shown in fig. 2 is of a bilaterally symmetrical structure, the fixed part 11 is located at the middle position, and the two resonance parts 12 are respectively and integrally formed on two sides of the fixed part 11; each resonant member 12 specifically includes a resonant body 121 and a piezoelectric unit 122, as shown in fig. 2, the piezoelectric element 122 is disposed on a side of the resonant body 121 facing away from the support component 2, and when the piezoelectric element 122 is deformed by applying a voltage, the resonant body 121 deforms along with the piezoelectric element 122; on the other hand, a contact portion M is formed on the side of the resonator body 121 facing the support member 2, and is used for contacting the follower when the resonator body 121 is driven by the piezoelectric element 122. The contact M is preferably located at an edge of the resonator body 121 away from the piezoelectric element 122, and when the resonator body 121 moves along with the piezoelectric element 122, the contact M located at the edge of the resonator body 121 can amplify the movement.

In one way of matching the piezoelectric driving structure with the driven member 3 as shown in fig. 3, the supporting member 2 is configured as a supporting member 21, and the working principle of the piezoelectric driving structure is described by taking the supporting member 21 as an example. The support member 21 and the first resonator 1 are respectively arranged on two opposite sides of the driven member 3; the support 21 has a support surface 21A facing the first resonator 1, the support surface 21A and the first resonator 1 cooperate to define a plane of a moving path of the driven member 3 between the support 21 and the first resonator 1, it should be noted that, when the piezoelectric driving structure is not activated, the fixing member 11 of the first resonator 1 is fixed to a structure of an application environment, and at this time, the first resonator 1 can apply a certain pre-tension to the driven member 3 according to a use requirement. For the first resonator 1, the two

resonators

12a, 12b are independently controllable, when a high-frequency voltage is applied to the piezoelectric element 122a in one resonator 12a, the piezoelectric element 122a is subjected to vibration deformation, the piezoelectric element 122a is arranged on the resonant body 121A, the resonant body 121A resonates with the piezoelectric element 122a, the contact part M of the resonator 12a is pressed and rubbed with the driven member 3, and a driving force is applied to the driven member 3 to move along a set direction (for example, the X direction in the example of fig. 3) on the plane of the supporting surface 21A; meanwhile, when a stable voltage is applied to the piezoelectric element 122b in the other resonator 12b, the piezoelectric element 122b is structurally deformed, and since the piezoelectric element 122b is disposed on the resonator body 121b, the resonator body 121b is displaced toward the driven member 3 in response to the deformation of the piezoelectric element 122b, the contact portion M' of the resonator 12b is in contact with the driven member 3, and applies a pressing force to the driven member 3 so as to move in a predetermined direction (for example, X direction in the example of fig. 3) on the plane of the supporting surface 21A without being displaced; here, one of the resonator elements 12a of the first resonator 1 is used for driving, and the other resonator element 12b is used for limiting, so that the certainty of the moving direction of the driven member 3 is ensured.

Since the two resonator elements 12 of the first resonator 1 are individually controllable, by exchanging the voltage application modes of the two

resonator elements

12a, 12b shown in fig. 3, specifically, by applying a stable voltage to the piezoelectric element 122a in the resonator element 12a and applying a high-frequency voltage to the piezoelectric element 122b in the resonator element 12b, the effects of the two

resonator elements

12a, 12b on the driven member 3 are exchanged, specifically, the resonator element 12a limits the driven member 3, and the resonator element 12b drives the driven member 3. The direction of the driving force applied to the driven member 3 by the resonating member 12b (the X' direction shown in fig. 4) is opposite to the direction of the driving force applied to the driven member by the resonating member 12a in the previous process (the X direction shown in fig. 3).

By combining the operation state shown in fig. 3 with the operation state shown in fig. 4, the driven member 3 can be driven to reciprocate, which is equivalent to driving the driven member 3 to go forward by one resonator 12a of the first resonator 1 and driving the driven member 3 to go backward by the other resonator 12b of the first resonator 1, as long as the parameters of the high-frequency voltage applied to the piezoelectric element 122a of the resonator 12a and the high-frequency voltage applied to the piezoelectric element 122b of the resonator 12b are controlled to be the same, the mode and amplitude of the vibration of the resonant body 121a and the resonant body 121b driven by the piezoelectric element 122a and the piezoelectric element 122b are controlled to be the same, and finally the driving force applied to the driven member 3 in the going process and the driving force applied to the driven member 3 in the returning process of the piezoelectric driving structure are the same except for the opposite directions, the motion parameters such as the speed and the acceleration of the motion of the driven part 3 are the same, and when the driven part 3 is driven to do reciprocating motion, the response time is the same, so that the piezoelectric driving structure can drive the driven part 3 more accurately.

It should be noted that, referring to fig. 3 and 4, when a stable voltage is applied to the

resonant member

12a or 12b in the first resonator 1, the magnitude of the pressure applied to the driven member 3 by the

resonant member

12a or 12b can be changed by adjusting the frequency of the stable voltage.

The first resonator 1 in the above embodiments is the structure shown in fig. 5, one end of the resonant body 121 of the two resonant pieces 12 is connected to the fixed piece 11, the other end forms the contact portion M, and the piezoelectric element 122 is disposed on the side of the resonant body 121 away from the support component 2. Referring to the specific structure of one of the resonator elements 12 of the first resonator 1 shown in fig. 6, the resonator body 121 includes a straight section 1211 and a bent section 1212, where the bent section 1212 is bent along the straight section 1211 away from the fixing element 11 to form a protrusion, which is a contact portion M. When the first resonator 1 of this structure is mated with the support member 2, there is no overlap between the projection of the contact portion M on the support member 2 and the projection of the straight section 1211 on the support member 2.

Fig. 7 shows another structure of the first resonator 1, and unlike fig. 6, the structure of the first resonator 1 shown in fig. 7 has the piezoelectric element 122 in each of the resonance members 12 disposed on the side of the resonance body 121 facing the support member 2. Of course, in order to ensure the stability of the structure and the operating state of the first resonator 1, the positions of the piezoelectric elements 122 in the two resonator elements 12 with respect to the resonator body 121 are symmetrical with respect to the fixed member 11. That is, when the piezoelectric element 122 of one of the resonator elements 12 is disposed on the side of the resonator body 121 facing away from the support member 2, the piezoelectric element 122 of the other resonator element 12 is also disposed on the side of the resonator body 121 facing away from the support member 2 (as shown in fig. 6); alternatively, when the piezoelectric element 122 of one of the resonator members 12 is disposed on the side of the resonator body 121 facing the support member 2, the piezoelectric element 122 of the other resonator member 12 is also disposed on the side of the resonator body 121 facing the support member 2 (as shown in fig. 7). Of course, the piezoelectric element 122 of the resonator 12 may be disposed at other positions of the resonator body 121 in other manners, as long as the effect of driving the resonator body 121 to operate by the deformation of the piezoelectric element 122 can be achieved.

On the basis of the structure of the first resonator 1 shown in fig. 6, the structure of the bent segment 1212 is deformed to be bent in a direction in which the straight segment 1211 approaches the fixed member 12 to form a protrusion as the contact portion M, resulting in the structure of the first resonator 1 shown in fig. 8. When the first resonator 1 of this structure is mated with the support member 2, there is an overlap between the projection of the contact portion M on the support member 2 and the projection of the straight section 1211 on the support member 2.

According to the above embodiment, the fixing member 11 in the first resonator 1 is used to be fixed to other structures in an application scene to provide stable support for the whole first resonator 1, and the fixing member 11 herein may be divided into two parts, as shown in fig. 9, the fixing member 11 in the first resonator 1 is divided into the first fixing portion 11a and the second fixing portion 11b which are independent, one of the resonance members 12a is connected to the first fixing portion 11a, and the other resonance member 12b is connected to the second fixing portion 11 b. The fixing member 11 is divided into two independent parts and is respectively matched and connected with the two resonance members 12, and the positions of the two resonance members 12 can be reasonably set according to the requirements of the driven member 3 and the space of an application scene. As shown in fig. 10, in a manner that the first resonator 1 is arranged with respect to the driven member 3, the two resonance members 12 are arranged in parallel with each other. It is to be noted that, with the first resonator 1 of this structure, the orientation of one of the resonating members 12a with respect to the first fixed block 11a is opposite to the orientation of the other resonating member 12b with respect to the second fixed block 11 b. Of course, the positions of the two resonant members 12 can be adjusted reasonably according to other structures or sizes of the driven member 3.

On the basis of the structure of the support assembly 2 shown in fig. 3 or fig. 4, the support 21 may further have a guide groove 211 formed thereon, for example, as shown in fig. 11, the guide groove 211 is used to form a gap for accommodating the follower 3 corresponding to the first resonator 1. When the follower 3 is disposed in the gap between the guide groove 211 of the support 21 and the first resonator 1, the guide groove 211 matches the follower 3, the guide groove 211 corresponds to a track for the follower 3 to move, and the first resonator 1 is located on the other side of the follower 3 with respect to the support 21.

In a possible implementation manner, as in the piezoelectric driving structure shown in fig. 12, the supporting component 2 may be a second resonance member 22, and the second resonance member 22 has the same structure as the first resonance member 1 and is symmetrically disposed about the driven member. Of course, the second resonator element 22 also comprises a fixed element 221 and two resonator elements 222, similar in structure to the first resonator element 1. Specifically, as shown in fig. 13, the two resonator pieces 222 of the second resonator 22 are

resonator pieces

222a and 222b, respectively, wherein the resonator piece 222a includes a resonator body 2221a and a piezoelectric element 2222a disposed on a side of the resonator body 2221a away from the first resonator 1, and the resonator piece 222b includes a resonator body 2221b and a piezoelectric element 2222b disposed on a side of the resonator body 2221b away from the first resonator 1. As can be seen from fig. 13, the first resonator 1 and the second resonator 22 have the same structure and are symmetrically disposed, the resonator 12a of the first resonator 1 corresponds to the resonator 222a of the second resonator 22, and the resonator 12b of the first resonator 1 corresponds to the resonator 222b of the second resonator 22. In operation, a high-frequency voltage with the same parameters is simultaneously applied to the piezoelectric element 122a of the resonator 12a in the first resonator 1 and the piezoelectric element 2222a of the resonator 222a in the second resonator 22, and the two

resonators

12a and 222a can simultaneously drive the driven member 3 to move along the set direction; and, the piezoelectric element 122b of the resonator 12b in the first resonator 1 and the piezoelectric element 2222b of the resonator 222b in the second resonator 22 are applied with the same parameters of stable voltage at the same time, and the two

resonators

12b and 222b can limit the driven member 3 at the same time so that it does not deflect during the movement.

Of course, in the piezoelectric driving structure shown in fig. 13, by simultaneously exchanging the voltage application manner of the two

resonant elements

12a and 12b in the first resonator 1 and the voltage application manner of the two

resonant elements

222a and 222b in the second resonator 22, the driven element 3 can be driven to reciprocate (as shown by the arrow in fig. 13), and the principle thereof is the same as the driving manner of the piezoelectric driving structure, and is not repeated here.

It is foreseen that in this embodiment, a first resonator 1 and a second resonator 22 are taken as a set of resonant components, and multiple sets of resonant components are disposed on both sides of the follower 3, so as to obtain a piezoelectric driving structure as shown in fig. 14, wherein two first resonators 1a and 1b are disposed on one side 3a of the follower 3, and two

second resonators

22a and 22b are disposed on the other side 3b of the follower 3, respectively, wherein the first resonator 1a and the second resonator 22a are symmetrical with respect to the follower 3, and the first resonator 1b and the second resonator 22b are symmetrical with respect to the follower 3. Referring to fig. 15, the relative positions of the first resonator 1a and the second resonator 22a on one side 3a of the follower 3 are shown (the first resonator 1b and the second resonator 22b on the other side 3b of the follower 3 are not shown in fig. 15), the first resonator 1a and the second resonator 22a are controlled to apply a driving force to the follower 2 in the Y direction shown in fig. 15, the second resonator 1b and the second resonator 22b are controlled to apply a driving force to the follower 2 in the X direction shown in fig. 15, and then the moving direction of the follower 3, that is, the X direction and the Y direction are combined. By analogy, the positions of each group of resonance components are reasonably set by utilizing a plurality of groups of resonance components, and the motion path of the driven part 3 is planned, so that the compound motion of the driven part 3 can be realized, for example, the driven part 3 is driven to move along a certain non-linear track.

Any piezoelectric driving structure provided by the above embodiments is applied to a camera lens of an electronic device (e.g., a mobile phone or a tablet computer), and the piezoelectric driving structure can drive a lens of the camera lens to perform a reciprocating linear motion (here, the lens of the camera lens is a driven member) as required. Specifically, the lens is installed on the lens support, and the piezoelectric driving structure drive is used for installing the lens support removal of lens to drive the stable accurate removal of lens.

Certainly, this application also provides an electronic equipment, and above-mentioned camera lens is installed to this kind of electronic equipment's equipment body, can get better shooting effect in the shooting process, brings better use experience for the user.

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

1. A piezoelectric driving structure, comprising a support member and a first resonator; the supporting component and the first resonator are matched to form a gap for accommodating a driven piece and limiting a moving path of the driven piece;

the first resonator comprises a fixed part and two resonance parts respectively connected with the fixed part, each resonance part comprises a resonance body and a piezoelectric element which is arranged on the resonance body and can be controlled independently, and a contact part for contacting the driven part is formed on one side of the resonance body facing the supporting component;

in each of the resonant pieces, when the piezoelectric element is applied with a stable voltage, the piezoelectric element drives the resonant body to move towards the supporting component so as to cooperate with the supporting component to define a moving path of the driven piece; when the piezoelectric element is applied with high-frequency voltage, the piezoelectric element drives the resonance body to vibrate so as to drive the driven piece to move along a set direction according to a defined moving path;

and in the two resonant members, the driving force generated by the resonant body of one resonant member when vibrating on the driven member and moving along the moving path is opposite to the driving force generated by the resonant body of the other resonant member when vibrating on the driven member and moving along the moving path.

2. The piezoelectric driving structure according to claim 1, wherein the resonant body comprises a straight section and a bent section, one end of the straight section is connected to the fixing member, and the other end of the straight section is connected to the bent section;

the piezoelectric element is arranged on one side of the straight section, which is far away from the supporting component;

the bent section has a projection toward the support member to form the contact portion.

3. The piezoelectric driving structure according to claim 2, wherein the bending section bends from an end of the straight section away from the fixing member to a direction away from the fixing member to form the protrusion.

4. The piezoelectric driving structure according to claim 2, wherein the bending section bends from an end of the straight section away from the fixing member to a direction close to the fixing member to form the protrusion.

5. The piezoelectric driving structure according to claim 1, wherein the fixing member includes a first fixing portion and a second fixing portion which are independently provided, one of the resonance members being connected to the first fixing portion, and the other of the resonance members being connected to the second fixing portion.

6. The piezoelectric driving structure according to claim 1, wherein the fixing member is a unitary structure with both of the resonating members.

7. The piezoelectric driving structure according to claim 1, wherein the support member includes a second resonator identical to the first resonator and symmetrical to the first resonator with respect to the gap.

8. The piezoelectric driving structure according to claim 7, wherein the number of the first resonators is plural, the number of the second resonators is plural, and the first resonators and the second resonators are provided in one-to-one correspondence.

9. The piezoelectric driving structure according to claim 1, wherein the support member includes a support member having a support surface parallel to the setting direction and facing the first resonator.

10. A piezoelectric driving construction according to claim 9, wherein the support surface is provided with guide grooves extending along a defined path of movement.

11. A camera lens comprising a lens, a lens holder and a piezo-electric drive structure according to any of claims 1 to 10;

the lens is arranged on the lens support, and the piezoelectric driving structure is used for driving the lens support to move along a set direction.

12. An electronic apparatus characterized by comprising an apparatus body on which the camera lens according to claim 11 is provided.