WO2023082979A1

WO2023082979A1 - Motor and electronic device

Info

Publication number: WO2023082979A1
Application number: PCT/CN2022/126983
Authority: WO
Inventors: 刘彬; 郑科; 边心秀; 李邓峰; 张百亮
Original assignee: 华为技术有限公司
Priority date: 2021-11-11
Filing date: 2022-10-24
Publication date: 2023-05-19
Also published as: CN116131657A

Abstract

The present application relates to a motor and an electronic device. The motor comprises a rotor and a stator; the stator comprises a mounting plate, a driving member and a fixing member; the mounting plate is used for mounting a vibration sheet; the vibration sheet can drive the mounting plate and the driving member to vibrate; the driving member is used for driving the rotor to move in a first direction. The fixing member is connected to the mounting plate by means of a connecting member, the connecting member can elastically deform, and the connecting member, the fixing member and the mounting plate are of an integrated structure. By providing the connecting member to apply pressure to the stator, the overall structure of the motor is simplified, the volume of the motor is reduced, and the motor can be conveniently mounted in a miniature electronic device.

Description

Electrical and Electronic Equipment

This application claims the priority of the Chinese patent application with the application number 202111337398.4 and the title of the invention "Electrical and Electronic Equipment" filed with the China Patent Office on November 11, 2021, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of motors, in particular to a motor and electronic equipment.

Background technique

Electronic equipment usually uses a voice coil motor to drive the camera to complete autofocus, but because the voice coil motor has a magnet inside, other magnetic components inside the electronic equipment will interfere with the voice coil motor, affecting the normal operation of the voice coil motor. The coil motor also has problems such as its large size, and cannot be applied to electronic equipment that requires high performance of the motor.

application content

The present application provides a motor and an electronic device, which apply pressure to the stator through the elastic deformation of the connecting piece, improve the contact reliability between the mover and the stator, improve the performance of the motor, and reduce the volume of the motor.

The first aspect of the present application provides a motor, the motor comprising:

Movers;

Stator, the stator includes a mounting plate, a driving piece and a fixing piece, the mounting plate is used to install a vibrating piece, the vibrating piece can drive the mounting plate and the driving piece to vibrate, and the driving piece is used to drive the The mover moves along the first direction;

Wherein, the fixing part is connected to the installation board through a connecting part, the connecting part can be elastically deformed, and the connecting part is integrated with the fixing part and the installation board.

In the above solution, the restoring force generated after the elastic deformation of the connecting piece can provide the required pressure for the stator, so that it is always in contact with the mover, so that the drive of the mover is realized through the friction between the driving member and the mover , improve the contact reliability between the mover and the stator, and improve the performance of the motor. At the same time, the connecting piece, the fixing piece and the mounting plate are arranged as an integral structure, which makes the overall structure of the motor simpler, reduces the volume of the motor, and facilitates the installation of the motor in microelectronic equipment.

In a possible design, the section moment of inertia of the connecting piece is smaller than the section moment of inertia of the fixing piece and the section moment of inertia of the mounting plate.

In the above scheme, by setting the section moment of inertia of the connecting piece to be smaller than the section moment of inertia of the fixing piece and the section moment of inertia of the mounting plate, when the elastic modulus of the connecting piece is the same as that of the fixing piece and the mounting plate (that is, the connecting piece and the mounting plate are the same) When the fixing part and the mounting plate are an integral structure with the same material), it can ensure that the stiffness of the connecting part is less than that of the fixing part and the rigidity of the mounting plate. degree of deformation. Therefore, during the working process of the motor, the connecting piece will not suppress the vibration of the mounting plate. At the same time, it can exert pressure on the stator through the large degree of deformation of the connecting piece, so that the mover and the stator are always maintained during the working process of the motor. touch.

In a possible design, the connecting piece has a first end connected to the fixing piece and a second end connected to the mounting plate, and the position of the largest cross-sectional area of the connecting piece is at the first end Or the position where the second end is located, the position of the smallest cross-sectional area of the connecting member is located between the first end and the second end.

In the above solution, when the position with the smallest cross-sectional area is located between the first end and the second end, the position where the connector deforms the most under the action of an external force is between the first end and the second end. The largest position is not connected with the fixing piece and the mounting plate, thereby reducing the influence of the position of the largest deformation of the connecting piece on the fixing piece and the mounting plate during the deformation process. At the same time, when the first end or the second end is the position with the largest cross-sectional area, it can reduce the impact of the connecting piece on the fixing piece and the mounting plate while ensuring the connection strength between the first end and the fixing piece, and the second end and the mounting plate. Impact.

In a possible design, the first end and the second end are connected by an arc surface, and the arc surface is recessed toward the inside of the connecting member.

In the above solution, along the second direction, both ends of the connector are arc structures that are concave inward toward the arc surface, which is simple in structure and easy to process. At the same time, the arc-shaped structure can reduce the stress concentration between the first end and the second end, thereby improving the working life of the connecting piece.

In a possible design, the connecting piece has a first end connected to the fixing piece and a second end connected to the mounting plate, and a Depression.

In the above solution, a recessed part is provided between the first end and the second end of the connecting part, so as to reduce the section moment of inertia of the part of the connecting part between the first end and the second end, so that the degree of deformation in the connecting part The largest position is between the first end and the second end, and the position with the largest degree of deformation is not connected with the fixing part and the mounting plate, thereby reducing the impact on the fixing part and the mounting plate during the deformation process of the position with the largest degree of deformation of the connecting part. Influence. At the same time, when the recessed part is provided between the first end and the first end, the connection strength between the first end and the fixing piece, the second end and the mounting plate can be ensured, and the impact of the connecting piece on the fixing piece and the mounting plate can be reduced. Influence.

In a possible design, the connecting piece is located on a side of the installation plate away from the driving piece along the second direction, and/or, the connecting piece is located on both sides of the installation plate along the first direction .

In the above solution, by arranging the connecting piece on the side of the mounting plate away from the driving piece along the second direction, and/or arranging the connecting piece on both sides of the mounting plate along the first direction, it can be ensured that the connecting piece is Elastic deformation occurs, that is, the restoring force of the connecting part can drive the mounting plate and the driving part to move close to the mover along the second direction.

In a possible design, the fixing member has a U-shaped groove, at least part of the mounting plate and the connecting piece are located in the U-shaped groove, and the mounting plate and the side wall of the U-shaped groove They are only connected by the connecting piece, so that there is a gap between the mounting plate and the side wall and the bottom wall of the U-shaped groove.

In the above scheme, a U-shaped groove is provided on the fixing part, so that the mounting plate and the fixing part are only connected through the connecting part, and the mounting plate and the fixing part can be separated, so that the external fixing structure will not interfere with the mounting plate and vibration The contact between the plate and the plate reduces the suppression effect of the external fixed structure on the vibration of the mounting plate, thereby improving the driving effect of the mounting plate and the driving member on the mover.

In a possible design, the driving member is in interference fit with the mover.

In the above solution, the drive part and the mover always maintain an interference fit during the working process of the motor, so that friction can be generated between the drive part and the mover, so that the mover can move in the first direction driven by the drive part , and through the elastic deformation of the connecting piece, pressure can be applied to the driving piece, so that the mover and the driving piece are always in contact during the working process of the motor.

In a possible design, the motor further includes a clamping part, and the clamping part clamps the fixing part along a third direction.

In the above solution, clamping pieces are provided on both sides of the fixing piece along the third direction Z, and the clamping piece clamps the fixing piece, that is, it can limit the fixing piece along the third direction, and the holding piece is connected with the electronic Other structures of the equipment are connected to realize the fixed installation of the stator.

In a possible design, the mounting plate, the driving part, the fixing part and the connecting part are integrally formed.

In the above solution, since the driving part and the mover are driven by friction, the integrally formed structure can increase the connection strength between the driving part and the mounting plate, and reduce the friction between the driving part and the mounting plate due to shear deformation during the driving process. Risk of breakage, thereby increasing the working life of the motor.

In a possible design, the driving member has a through hole.

In the above solution, when the through hole is provided on the driving part, the weight of the driving part can be reduced, and the amplification effect of the driving part on the vibration generated by the mounting plate along the second direction can be further improved.

In a possible design, the driving member has a trapezoidal or triangular cross-section, and the cross-sectional area of the driving member that cooperates with the mover is smaller than the cross-sectional area that is connected with the mounting plate.

In the above solution, when the section of the driving member is trapezoidal or triangular, the contact area between the driving member and the mover is smaller, which reduces the frictional resistance between the driving member and the mover, and can improve the driving force of the driving member to the mover. Effect. The cross-sectional area of the driver and the mover is smaller than the cross-sectional area of the connection with the mounting plate, which ensures the structural stability of the driver itself and the stability of the connection between the driver and the mounting plate, and prevents the connection between the driver and the mounting plate from occurring. fracture.

In a possible design, along the third direction, both sides of the mounting plate are provided with the vibrating piece, the vibrating piece is a piezoelectric ceramic piece, and the vibrating piece includes a first partition, a second partition , the third partition and the fourth partition, the first partition and the second partition, the third partition and the fourth partition are distributed along the first direction, the first partition and the fourth partition, The second subregion and the third subregion are distributed along the second direction; the polarity of the first subregion is the same as that of the second subregion, and the polarity of the third subregion is the same as that of the fourth subregion, so The polarities of the first subregion and the fourth subregion are opposite, and the polarities of the second subregion and the third subregion are opposite.

In the above scheme, the polarities of the first and second partitions are the same, the polarities of the third and fourth partitions are the same, the polarities of the first and fourth partitions are opposite, and the polarities of the second and third partitions are On the contrary, it reduces the difficulty of wiring when applying a voltage signal to the vibrating piece.

In a possible design, the phase difference between the sinusoidal voltage signals of the first partition and the fourth partition and the sinusoidal voltage signals of the second partition and the third partition is 90°, so that the The mounting plate and the driving member move along an elliptical track in the plane where the first direction and the second direction are located.

In the above scheme, by setting the phase difference between the sinusoidal voltage signals applied by the first and fourth partitions and the sinusoidal voltage signals applied by the second and third partitions to be 90°, the first-order bending mode of the mounting plate can be simultaneously excited and the second-order bending mode, so that the mounting plate and the driving member move along an elliptical trajectory in the plane where the first direction and the second direction are located, so as to drive the mover to move horizontally along the first direction.

The second aspect of the present application provides a device, and the electronic device includes:

Camera;

A motor, the motor is used to drive the camera to move, wherein the motor is the above-mentioned motor.

In the above solution, the motor can drive the camera to move to achieve focusing.

It is to be understood that both the foregoing general description and the following detailed description are exemplary only and are not restrictive of the application.

Description of drawings

Fig. 1 is the schematic structural diagram of the motor provided by the present application in the first embodiment;

Fig. 2 is a structural schematic diagram of the stator in Fig. 1;

Fig. 3 is the schematic structural diagram of the motor provided by the present application in the second embodiment;

FIG. 4 is a schematic structural view of the motor provided by the present application in a third embodiment;

Fig. 5 is a schematic structural diagram of the vibrating piece in Fig. 1 when it is connected to a voltage signal;

Fig. 6 is the first-order modal diagram of the stator in Fig. 1;

Fig. 7 is the second-order modal diagram of the stator in Fig. 1;

FIG. 8 is a schematic diagram of the stator moving along an elliptical track in FIG. 1 .

Reference signs:

1 - mover;

2 - stator;

21 - mounting plate;

22-driver;

221 - through hole;

23-Fixer;

231-U-shaped groove;

24-connector;

241 - first end;

242 - second end;

3- vibrating piece;

31 - the first division;

32 - second division;

33 - third division;

34 - the fourth division;

4-Clamping piece.

X - first direction;

Y - the second direction;

Z - third direction.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

Detailed ways

In order to better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

In a specific embodiment, the present application will be further described in detail below through a specific embodiment and in conjunction with the accompanying drawings.

Piezoelectric motors do not have magnetic components inside and will not generate electromagnetic interference. Therefore, electronic equipment can use piezoelectric motors instead of voice coil motors. Piezoelectric motors have a strong load capacity and a long motion stroke, which enables the camera to expand the focus range.

The piezoelectric motor includes a mover and a stator, and the stator can drive the mover to move, so that the camera connected to the mover moves with the mover to complete focusing. Since the stator and the mover are driven by friction, it is necessary to apply pressure to the stator so that the mover and the stator are always in contact during the driving process. At present, a spring is usually installed at one end of the stator, and the restoring force generated by the compression of the spring is used as the pressure on the stator. However, the spring is large and needs to occupy additional space, resulting in the overall volume of the piezoelectric motor being too large. At the same time, the vibration generated by the spring itself will interfere with the movement of the stator, affecting the focusing effect.

In order to solve the above technical problems, an embodiment of the present application provides a motor that can be installed in an electronic device, such as a camera, a mobile phone, a tablet computer, a desktop computer, a laptop computer, a handheld computer, a notebook computer, a super mobile personal computer (ultra-mobile personal computer, UMPC), netbook, and cell phone, personal digital assistant (personal digital assistant, PDA), augmented reality (augmented reality, AR) equipment, virtual reality (virtual reality, VR) equipment, Artificial intelligence (artificial intelligence, AI) devices, wearable devices, vehicle-mounted devices, smart home devices and/or smart city devices, etc., the embodiments of the present application do not specifically limit the specific types of the electronic devices.

The following describes the application of a motor in a mobile phone as an example. The motor can specifically be used to drive the camera of the mobile phone to complete focusing. The motor is a piezoelectric motor, which can use the inverse piezoelectric effect of piezoelectric materials (materials capable of converting mechanical energy into electrical energy) to convert electrical energy into mechanical energy, that is, to apply voltage to the piezoelectric material installed on the motor drive structure, It can make it vibrate, so as to drive the driving structure of the motor to vibrate, and realize the driving of the moving structure through the friction between the driving structure and the moving structure on the motor.

As shown in Figures 1 and 2, the motor includes a mover 1 and a stator 2, and the stator 2 includes a mounting plate 21, a driving element 22 and a fixing element 23. The mounting plate 21 is used to install the vibrating piece 3, and the vibrating piece 3 can drive the installation The plate 21 and the driving member 22 vibrate, and the driving member 22 is used to drive the mover 1 to move along the first direction X. The fixing piece 23 and the mounting plate 21 are connected by a connecting piece 24 , the connecting piece 24 can be elastically deformed, and the connecting piece 24 is integrated with the fixing piece 23 and the mounting plate 21 .

In this embodiment, the vibrating piece 3 is a piezoelectric material, the mounting plate 21 and the driving member 22 are the driving structure of the motor, and the mover 1 is the moving structure of the motor. Applying a voltage to the vibrating piece 3 can cause it to vibrate, thereby Drive the mounting plate 21 and the driving member 22 to vibrate, and then drive the mover 1 to move along the first direction X.

When the motor is working, the mounting plate 21 vibrates under the drive of the vibrating plate 3, as shown in the embodiment of Figure 1, one end of the driver 22 is connected to the mounting plate 21, and the other end is in contact with the mover 1, therefore, the driver 22 can vibrate synchronously with the mounting plate 21 , and drive the mover 1 to move along the first direction X through the friction between the driving member 22 and the mover 1 . When the stator 2 is fixed and installed, since the distance between the fixing piece 23 and the mover 1 is fixed, along the second direction Y, the fixing piece 23 and the mover 1 can squeeze the mounting plate 21 and the driving piece 22, ensuring the drive The stable contact between the part 22 and the mover 1, at this time, the mounting plate 21 and the driving part 22 move close to the fixed part 23 in the second direction Y under the extrusion of the mover 1, so that it is used to connect the fixed part 23 and the mounting plate The connector 24 of 21 produces elastic deformation. Under the action of the restoring force of the connecting piece 24, the mounting plate 21 and the driving piece 22 can move close to the mover 1 along the second direction Y, so that the contact between the driving piece 22 and the mover 1 is closer, and the stator 2 and the moving piece are improved. The contact reliability between sub-1s ensures the normal driving of the motor.

Wherein, the second direction Y is perpendicular to the moving direction of the mover 1 .

In the embodiment of the present application, the restoring force generated by the elastic deformation of the connecting piece 24 can provide the required pressure for the stator 2, so that it is always in contact with the mover 1, so that through the friction between the drive member 22 and the mover 1 The function realizes the driving of the mover 1. At the same time, the connecting piece 24 is integrated with the fixing piece 23 and the mounting plate 21, which makes the overall structure of the motor simpler, reduces the volume of the motor, and facilitates the installation of the motor in microelectronic devices.

In addition, the integrated structure can also make the vibration frequency generated by the mounting plate 21, the fixing piece 23 and the connecting piece 24 under the action of the vibrating piece 3 the same, and there will be no interference between them, thereby ensuring that the mounting plate 21 and the driving piece 22 The vibration effect improves the stability and work efficiency of the motor.

In a specific embodiment, the driving member 22 is in interference fit with the mover 1 .

In this embodiment, the driver 22 and the mover 1 always maintain an interference fit during the operation of the motor, so that friction can be generated between the driver 22 and the mover 1, so that the mover 1 can be driven by the driver 22 The lower part can move along the first direction X, and through the elastic deformation of the connecting part 24, it can exert pressure on the driving part 22, so that the mover 1 and the driving part 22 always keep in contact during the working process of the motor.

Specifically, the section moment of inertia of the connecting piece 24 is smaller than the section moment of inertia of the fixing piece 23 and the section moment of inertia of the mounting plate 21 .

In this embodiment, by setting the section moment of inertia of the connecting piece 24 to be smaller than the section moment of inertia of the fixing piece 23 and the section moment of inertia of the mounting plate 21, when the elastic modulus of the connecting piece 24 is different from the elastic modulus of the fixing piece 23 and the mounting plate 21 When the amount is the same (that is, the connecting piece 24, the fixing piece 23, and the mounting plate 21 are an integral structure of the same material), it can ensure that the stiffness of the connecting piece 24 is less than the stiffness of the fixing piece 23 and the stiffness of the mounting plate 21. , the degree of deformation of the connecting member 24 is greater than the degree of deformation of the fixing member 23 and the mounting plate 21 . Therefore, during the working process of the motor, the connecting piece 24 will not suppress the vibration of the mounting plate 21. At the same time, it can exert pressure on the stator 2 through the large degree of deformation of the connecting piece 24, so that the mover 1 and the stator 2 are in the same position. Always keep in contact with the motor during operation.

Among them, the section moment of inertia can measure the ability of a section to resist bending deformation, that is, the smaller the section moment of inertia, the weaker the section's bending resistance and the smaller the stiffness. The section moment of inertia of the connecting piece 24 is smaller than the section moment of inertia of the fixing piece 23 and the section moment of inertia of the mounting plate 21 can be realized by at least the following two embodiments.

In a specific embodiment, the connector 24 has a first end 241 connected to the fixing member 23 and a second end 242 connected to the mounting plate 21, and the position of the largest cross-sectional area of the connector 24 is at the first end 241 or the second end. Where the two ends 242 are located, the smallest cross-sectional area of the connecting member 24 is located between the first end 241 and the second end 242 .

As shown in the embodiment of FIG. 2 , the position of the largest cross-sectional area of the connector 24 is set at the first end 241 or the second end 242 , and the position of the smallest cross-sectional area is set between the first end 241 and the second end 242 , and in the connector 24 , the position with the smallest cross-sectional area is the position with the smallest sectional moment of inertia in the connector 24 , that is, the position in the connector 24 that deforms the most under the action of an external force. Therefore, when the position with the smallest cross-sectional area is located between the first end 241 and the second end 242, the position where the connector 24 deforms the most under the action of external force is between the first end 241 and the second end 242, The position with the largest degree of deformation is not connected to the fixing member 23 and the mounting plate 21 , thereby reducing the influence of the position of the largest degree of deformation of the connecting member 24 on the fixing member 23 and the mounting plate 21 during deformation. At the same time, when the first end 241 or the second end 242 is the position with the largest cross-sectional area, it is possible to reduce the connecting member while ensuring the connection strength between the first end 241 and the fixing member 23, and the second end 242 and the mounting plate 21. 24 on the fixture 23 and the mounting plate 21.

Specifically, as shown in FIG. 2 , the first end 241 and the second end 242 are connected by an arc surface, and the arc surface is concave toward the inside of the connecting member 24 .

In this embodiment, along the second direction Y, both ends of the connecting member 24 are circular arc structures that are recessed toward the arc surface, which is simple in structure and easy to process. At the same time, the arc-shaped structure can reduce the stress concentration between the first end 241 and the second end 242 , thereby improving the working life of the connecting member 24 .

Wherein, along the second direction Y, the radii of the arcs at both ends of the connector 24 may be equal or unequal. In this embodiment, the radii of the arcs at both ends are equal, which can reduce the difficulty of the manufacturing process of the connector.

In another embodiment, the connecting member 24 has a first end 241 connected to the fixing member 23 and a second end 242 connected to the mounting plate 21, a recess ( not shown in the figure).

In this embodiment, according to the specific structure of the fixing piece 23 and the mounting plate 21, a recess can be provided between the first end 241 and the second end 242 of the connecting piece 24, so as to reduce the distance between the first end 241 and the second end 242 of the connecting piece 24. The section moment of inertia of the part between the second end 242 makes the position of the maximum degree of deformation in the connecting member 24 between the first end 241 and the second end 242, and the position of the maximum degree of deformation is not in contact with the fixing member 23 and the installation. The plates 21 are connected, so as to reduce the influence of the position of the connecting part 24 having the largest deformation degree on the fixing part 23 and the mounting plate 21 during the deformation process. At the same time, when the recessed portion is provided between the first end 241 and the first end 241, the connecting member 24 can be lowered while ensuring the connection strength between the first end 241 and the fixing member 23, and the second end 242 and the mounting plate 21. Influence on the fixing part 23 and the mounting plate 21 . .

Wherein, the present application does not limit the specific structure of the recessed portion, which may be a square, circular, elliptical through-hole structure or groove structure, but it should be ensured that the position of the maximum cross-sectional moment of inertia of the connector 24 is at the first end 241 Or the position of the second end 242 , the position of the minimum section moment of inertia of the connecting member 24 is located between the first end 241 and the second end 242 .

In a specific embodiment, the connecting member 24 is located on a side of the mounting plate 21 away from the driving member 22 along the second direction Y, and/or, the connecting member 24 is located on both sides of the mounting plate 21 along the first direction X.

In this embodiment, when the mounting plate 21 and the driving member 22 move away from the mover 1 along the second direction Y, the connecting member 24 can be elastically deformed. In order to keep the driving member 22 in contact with the mover 1 during the driving process, The restoring force of the connecting member 24 should make the driving member 22 move closer to the mover 1 along the second direction Y, that is, the connecting member 24 should be elastically deformed along the second direction Y.

When the connecting piece 24 is arranged on the side of the mounting plate 21 away from the driving piece 22 along the second direction Y, the two ends of the connecting piece 24 along the second direction Y are respectively connected to the mounting plate 21 and the fixing piece 23, when the stator 2 is installed Finally, the mounting plate 21 and the driving member 22 are pressed by the mover 1 and move away from the mover 1 along the second direction Y. The second direction Y moves away from the mover 1, resulting in elastic deformation. In this case, the restoring force of the connecting piece 24 makes the end of the connecting piece 24 connected to the mounting plate 21 move closer to the mover 1 along the second direction Y, so that the installation The plate 21 and the driving member 22 move close to the mover 1 along the second direction Y. When the connecting piece 24 is arranged on both sides of the mounting plate 21 along the first direction X, the two ends of the connecting piece 24 along the first direction X are respectively connected to the mounting plate 21 and the fixing piece 23. After the stator 2 is installed, the mounting plate 21 and the driving part 22 are pressed by the mover 1 and move away from the mover 1 along the second direction Y. At this time, the end of the connecting part 24 connected to the installation plate 21 is pulled by the installation plate 21 and moves away from the mover 1 along the second direction Y. The mover 1 moves to produce elastic deformation. In this case, the restoring force of the connecting piece 24 makes the end of the connecting piece 24 connected to the mounting plate 21 move closer to the mover 1 along the second direction Y, so that the mounting plate 21 and the driving piece 22 moves close to the mover 1 along the second direction Y.

By arranging the connecting piece 24 on the side of the mounting plate 21 away from the driving piece 22 along the second direction Y, and/or, arranging the connecting piece 24 on both sides of the mounting plate 21 along the first direction X, it is possible to ensure that the connecting piece 24 Elastic deformation occurs along the second direction Y, that is, the restoring force of the connecting member 24 can drive the mounting plate 21 and the driving member 22 to move closer to the mover 1 along the second direction Y.

Wherein, when the connecting member 24 is located on both sides of the mounting plate 21 along the second direction Y, as shown in FIG. The stability of the connection with the mounting plate 21.

In a specific embodiment, as shown in FIG. 2, the fixing member 23 has a U-shaped groove 231, at least part of the mounting plate 21 and the connecting piece 24 are located in the U-shaped groove 231, and the mounting plate 21 and the U-shaped groove 231 The side walls are only connected by the connecting piece 24 , so that there is a gap between the mounting plate 21 and the side wall and the bottom wall of the U-shaped groove 231 . In this embodiment, the fixing member 23 can be connected with the fixing structure in the electronic equipment to install the stator 2 in the electronic equipment. At this time, the fixing structure can suppress the vibration of the mounting plate 21 of the stator 2 . Therefore, the U-shaped groove 231 is set on the fixing part 23, so that the mounting plate 21 and the fixing part 23 are only connected by the connecting part 24, and the mounting plate 21 and the fixing part 23 can be separated, so that the external fixing structure will not Contact with the mounting plate 21 and the vibrating plate 3 reduces the suppression effect of the external fixed structure on the vibration of the mounting plate 21 , thereby improving the driving effect of the mounting plate 21 and the driving member 22 on the mover 1 .

In a specific embodiment, as shown in FIG. 1 , the motor further includes a clamping part 4 , and the clamping part 4 clamps the fixing part 23 along the third direction Z.

In this embodiment, clamping pieces 4 are provided on both sides of the fixing piece 23 along the third direction Z, and the clamping piece 4 clamps the fixing piece 23, that is, it can limit the fixing piece 23 along the third direction Z, And the clamping part 4 is connected with other structures of the electronic equipment, so as to realize the fixed installation of the stator 2 .

Wherein, the concrete structure of clamping piece 4 is not limited, and in the present embodiment, the shape of clamping piece 4, size are all identical with fixing piece 23, has increased the connection area of clamping piece 4 and fixing piece 23, thereby has improved The connection strength between the clamping piece 4 and the fixing piece 23. Specifically, the clamping part 4 and the fixing part 23 can be fixed by glue bonding, the process is simple and the stress distribution on the connecting surface is even, and the fixing part 23 will not be damaged.

It should be noted that the third direction Z is perpendicular to the plane where the first direction X and the second direction Y are located.

In a specific embodiment, as shown in FIG. 2 , the mounting plate 21 , the driving part 22 , the fixing part 23 and the connecting part 24 are integrally formed.

In this embodiment, the mounting plate 21 , the driving part 22 , the fixing part 23 and the connecting part 24 are integrally formed, that is, the stator 2 is integrally formed. When the mounting plate 21 vibrates under the driving of the vibrating plate 3 , it can drive the driving member 22 to vibrate synchronously with the mounting plate 21 , improving the reliability and controllability of the vibration of the driving member 22 . Since the driving part 22 and the mover 1 are driven by friction, the integrally formed structure can increase the connection strength of the connection between the driving part 22 and the mounting plate 21, and reduce the contact between the driving part 22 and the installation due to shear deformation during the driving process. The plate 21 creates a risk of breakage, thereby increasing the working life of the motor.

In a specific embodiment, as shown in FIG. 4 , the driving member 22 has a through hole 221 .

In this embodiment, the driving member 22 can convert the vibration of the mounting plate 21 in the second direction Y into a displacement along the second direction Y, that is, the driving member 22 has an effect on the vibration of the mounting plate 21 along the second direction Y. Magnification. When the driving member 22 is provided with the through hole 221 , the weight of the driving member 22 can be reduced, and the amplification effect of the driving member 22 on the vibration generated by the mounting plate 21 along the second direction Y can be further improved.

Specifically, as shown in FIG. 3 and FIG. 4 , the section of the driving member 22 is trapezoidal or triangular, and the cross-sectional area of the driving member 22 matched with the mover 1 is smaller than the cross-sectional area connected with the mounting plate 21 .

In this embodiment, as shown in the embodiment shown in FIG. 3 and FIG. 4 , when the section of the driving member 22 is trapezoidal or triangular, the contact area between the driving member 22 and the mover 1 is smaller, reducing the contact area between the driving member 22 and the mover 1. The frictional resistance between the movers 1 can improve the driving effect of the driving member 22 on the mover 1 . The cross-sectional area of the driving part 22 matched with the mover 1 is smaller than the cross-sectional area connected with the mounting plate 21, which ensures the structural stability of the driving part 22 itself and the connection stability between the driving part 22 and the mounting plate 21, and prevents the driving part 22 from The connection with the mounting plate 21 breaks.

In a specific embodiment, as shown in Figure 1, along the third direction Z, vibrating pieces 3 are arranged on both sides of the mounting plate 21, and the vibrating pieces 3 are piezoelectric ceramic pieces, as shown in Figure 5, the vibrating The slice 3 includes a first subregion 31, a second subregion 32, a third subregion 33 and a fourth subregion 34, the first subregion 31 and the second subregion 32, the third subregion 33 and the fourth subregion 34 are distributed along the first direction X, and the No. The first subregion 31 and the fourth subregion 34 are distributed along the second direction Y along the second subregion 32 and the third subregion 33 . The polarities of the first division 31 and the second division 32 are the same, the polarities of the third division 33 and the fourth division 34 are the same, the polarities of the first division 31 and the fourth division 34 are opposite, and the polarities of the second division 32 and the third division are The polarity of 33 is reversed.

In this embodiment, the vibrating piece 3 is a piezoelectric ceramic piece. When a voltage signal is applied to the surface of the vibrating piece 3 , the vibrating piece 3 can convert electrical energy into mechanical energy and generate mechanical deformation, thereby driving the mounting plate 21 to vibrate. In this embodiment, the polarities of the first subregion 31 and the second subregion 32 are the same, the polarities of the third subregion 33 and the fourth subregion 34 are the same, the polarities of the first subregion 31 and the fourth subregion 34 are opposite, and the polarities of the second subregion 31 and the fourth subregion 34 are opposite. 32 and the third partition 33 have opposite polarities, which reduces the difficulty of wiring when applying a voltage signal to the vibrating piece 3 .

Among them, the piezoelectric ceramic sheet is easy to be made into various shapes, has high sensitivity and electromechanical coupling coefficient, that is, the piezoelectric ceramic sheet has a high efficiency of converting electrical energy into mechanical energy, and is suitable as a material for the vibrating sheet 3 .

In addition, the vibrating piece 3 and the mounting plate 21 can be connected by glue, which will not affect the vibration effect of the vibrating piece 3 and the mounting plate 21 .

In a specific embodiment, as shown in FIG. 5, the phase difference between the sinusoidal voltage signal of the first subregion 31 and the fourth subregion 34 and the sinusoidal voltage signal of the second subregion 32 and the third subregion 33 is 90°, so that Make the mounting plate 21 and the driving member 22 move along an elliptical track in the plane where the first direction X and the second direction Y are located.

When the phase difference between the sinusoidal voltage signal applied to the first partition 31 and the fourth partition 34 and the sinusoidal voltage signal applied to the second partition 32 and the third partition 33 is 0°, the vibrating piece 3 vibrates along the second direction Y , at this time, the first-order bending mode of the mounting plate 21 can be excited, as shown in FIG. 6 , the mounting plate 21 and the driving member 22 can generate displacement in the second direction Y.

When the phase difference between the sinusoidal voltage signals of the first partition 31 and the fourth partition 34 and the sinusoidal voltage signals of the second partition 32 and the third partition 33 is 180°, the vibrating piece 3 vibrates along the first direction X. At this time, The second-order bending mode of the mounting plate 21 can be excited, and as shown in FIG. 7 , the mounting plate 21 and the driving member 22 can generate displacement in the first direction X.

When applying the voltage signal as shown in Figure 5 to the vibrating plate 3 (that is, the phase difference between the sinusoidal voltage signal of the first partition 31 and the fourth partition 34 and the sinusoidal voltage signal of the second partition 32 and the third partition 33 is 90°) , the vibrating plate 3 can simultaneously excite the first-order bending mode and the second-order bending mode of the mounting plate 21, and the two modes can be coupled to each other, so that the mounting plate 21 and the driving member 22 can move in the first direction X and the second In the plane where the two directions Y are located, move clockwise along the elliptical trajectory.

Specifically, when the period of the sinusoidal voltage signal is T, the process of the mounting plate 21 and the driving member 22 moving clockwise along the elliptical trajectory in the plane where the first direction X and the second direction Y are located is shown in FIG. 8, t= When 0, the mass point a on the driver 22 is positioned at the right apex of the minor axis of the elliptical locus; during t=T/4, the mass point a on the driver 22 is positioned at the lower vertex of the major axis of the elliptical locus; when t=T/2 , the mass point a on the driver 22 is located at the left vertex of the minor axis of the elliptical locus; when t=3T/4, the mass point a on the driver 22 is located at the upper vertex of the major axis of the elliptical locus.

In this embodiment, by setting the phase difference between the sinusoidal voltage signal applied by the first subregion 31 and the fourth subregion 34 and the sinusoidal voltage signal applied by the second subregion 32 and the third subregion 33 to be 90°, the mounting board 21 can be excited simultaneously The first-order bending mode and the second-order bending mode make the mounting plate 21 and the driving member 22 move along an elliptical trajectory in the plane where the first direction X and the second direction Y are located, thereby driving the mover 1 along the first direction X horizontal movement.

Wherein, when a voltage signal opposite to that of the embodiment in FIG. 5 is applied to the vibrating plate 3 , the mounting plate 21 and the driving member 22 can move counterclockwise along an elliptical trajectory in the plane where the first direction X and the second direction Y are located.

In addition, the present application also provides an electronic device, the electronic device includes a camera and a motor, and the motor is used to drive the camera to move, wherein the motor is the motor described in any of the above embodiments, since the motor has the above technical effects , the electronic equipment including the motor should also have corresponding technical effects, which will not be repeated here.

It should be pointed out that a part of the patent application documents contains content protected by copyright. Copyright is reserved by the copyright owner other than to make copies of the contents of the patent file or records of the Patent Office.

Claims

A motor, characterized in that the motor comprises:

mover(1);

The stator (2), the stator (2) includes a mounting plate (21), a driving element (22) and a fixing element (23), the mounting plate (21) is used for mounting the vibrating piece (3), and the vibrating piece (3) capable of driving the mounting plate (21) and the driving member (22) to vibrate, and the driving member (22) is used to drive the mover (1) to move along the first direction (X);

Wherein, the fixing piece (23) is connected to the mounting plate (21) through a connecting piece (24), the connecting piece (24) can be elastically deformed, and the connecting piece (24) and the fixed The piece (23) and the mounting plate (21) are of an integral structure.
The motor according to claim 1, characterized in that the section moment of inertia of the connecting piece (24) is smaller than the section moment of inertia of the fixing piece (23) and the section moment of inertia of the mounting plate (21).
The motor according to claim 2, characterized in that, the connecting piece (24) has a first end (241) connected to the fixing piece (23) and a second end (241) connected to the mounting plate (21) end (242), the position of the largest cross-sectional area of the connector (24) is the position where the first end (241) or the second end (242) is located, and the minimum cross-sectional area of the connector (24) is located between the first end (241) and the second end (242).
The motor according to claim 3, characterized in that, the first end (241) and the second end (242) are connected by an arc surface, and the arc surface faces the connecting piece (24) internal depression.
The motor according to claim 2, characterized in that, the connecting piece (24) has a first end (241) connected to the fixing piece (23) and a second end (241) connected to the mounting plate (21) end (242), a recess is provided between the first end (241) and the second end (242).
The motor according to claim 2, characterized in that, the connecting member (24) is located on a side of the mounting plate (21) away from the driving member (22) along the second direction (Y), and/or , the connecting piece (24) is located on both sides of the mounting plate (21) along the first direction (X).
The motor according to claim 2, characterized in that, the fixing member (23) has a U-shaped groove (231), and at least part of the mounting plate (21) and the connecting member (24) are located in the U-shaped groove (231). In the groove (231);

The mounting plate (21) and the side wall of the U-shaped groove (231) are only connected by the connecting piece (24), so that the mounting plate (21) and the U-shaped groove (231) There is a gap between the side wall and the bottom wall.
The motor according to any one of claims 1-7, characterized in that the drive member (22) is in interference fit with the mover (1).
The motor according to any one of claims 1-7, characterized in that the motor further comprises a clamping piece (4), and the clamping piece (4) clamps the Fasteners (23).
The motor according to any one of claims 1-7, characterized in that, the mounting plate (21), the driving part (22), the fixing part (23) and the connecting part (24) One piece.
The motor according to any one of claims 1-7, characterized in that the drive member (22) has a through hole (221).
The motor according to claim 11, characterized in that, the cross-section of the driving member (22) is trapezoidal or triangular, and the cross-sectional area of the driving member (22) matched with the mover (1) is smaller than that of the mover (1). Describe the cross-sectional area that the mounting plate (21) connects.
The motor according to any one of claims 1-7, characterized in that, along the third direction (Y), both sides of the mounting plate (21) are provided with the vibrating piece (3), the The vibrating piece (3) is a piezoelectric ceramic piece;

The vibrating plate (3) includes a first partition (31), a second partition (32), a third partition (33) and a fourth partition (34), the first partition (31) and the second partition (32), the third partition (33) and the fourth partition (34) are distributed along the first direction (X), the first partition (31) and the fourth partition (34), the The second subregion (32) and the third subregion (33) are distributed along the second direction (Y);

The first subregion (31) and the second subregion (32) have the same polarity, the third subregion (33) and the fourth subregion (34) have the same polarity, and the first subregion ( 31) The polarity of the fourth subregion (34) is opposite, and the polarity of the second subregion (32) is opposite to that of the third subregion (33).
The motor according to claim 13, characterized in that, the sinusoidal voltage signals of the first subregion (31) and the fourth subregion (34) are compatible with the second subregion (32) and the third subregion ( 33) The phase difference of the sinusoidal voltage signal is 90°, so that the mounting plate (21) and the driving member (22) are elliptical in the plane where the first direction (X) and the second direction (Y) are located trajectory movement.
An electronic device, characterized in that the electronic device comprises:

Camera;

A motor, the motor is used to drive the camera to move, wherein the motor is the motor according to any one of claims 1-14.