CN112887555B - Piezoelectric motor, camera module and electronic equipment - Google Patents

Abstract

The application discloses piezoelectric motor, module and electronic equipment make a video recording. The piezoelectric motor includes: the piezoelectric element comprises a mounting seat and a piezoelectric body arranged on the mounting seat; the first conductor is connected with one end of the piezoelectric body and is used as a first electrode; the second conductor is connected with the other end of the piezoelectric body and used as a second electrode, and the second conductor comprises a butting part which is used for butting against the carrier and driving the carrier to move. This application drives the carrier motion through the characteristics that the piezoelectricity body takes place deformation under the circular telegram state. The mode of utilizing deformation to drive the carrier motion drives power reinforce, is favorable to driving heavier camera lens, realizes the purpose that the camera lens zooms, and then can adopt the structure more complicated, the bigger camera lens of weight promotes the performance of shooing of cell-phone. And the piezoelectric motor serving as the driving mechanism does not need to displace, occupies small space, has a simple structure, and is easy to install on electronic equipment such as a mobile phone.

Description

Piezoelectric motor, camera module and electronic equipment

Technical Field

The application belongs to the technical field of electronic equipment, concretely relates to piezoelectric motor, a module and an electronic equipment make a video recording.

Background

With the development of smart phone technology, the camera function has become the standard configuration of smart phones. The mobile phone is convenient to carry, and becomes the first choice when people take pictures and make video. Accordingly, people have higher and higher requirements on the performance of photographing smart phones. The lens is an important part for realizing the photographing function of the mobile phone, and the performance requirement of the lens is higher and higher. Because the photographing performance of the lens is greatly related to the optical performance of the lens, and the realization of the optical performance of the lens depends on various solid parts on the lens, the weight of the lens is increased correspondingly as the requirement on the image effect is improved, and the number or the volume of various solid parts on the lens is increased. The requirement for the driving force is correspondingly improved when the lens is zoomed due to the increased weight, so that the magnetic thrust of the existing electromagnetic motor cannot meet the requirement, and the conventional motor is too large in size and inconvenient to mount on a mobile phone, so that the photographing performance of the mobile phone is further improved.

Disclosure of Invention

The application aims at providing a piezoelectric motor, a camera module and electronic equipment, and solves the problem that a lens cannot be pushed at least.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides a piezoelectric motor, including:

a mounting base;

the piezoelectric body is arranged on the mounting seat;

a first conductor connected to one end of the piezoelectric body in a contact manner, the first conductor serving as a first electrode;

a second conductor connected to the other end of the piezoelectric body, a part of the second conductor serving as a second electrode, the second conductor including an abutting portion that abuts against the carrier;

the first conductor and the second conductor are used for being connected with a power supply, and when the piezoelectric body is electrified, the piezoelectric body deforms and drives the carrier to move through the abutting part.

In a second aspect, an embodiment of the present application provides a camera module, including:

the base is provided with an accommodating groove;

the carrier is arranged in the accommodating groove and used for bearing a lens, and avoidance holes suitable for avoiding the lens are respectively formed in the base and the carrier;

a piezoelectric motor according to any one of the first to third aspects, wherein the piezoelectric motor is provided on the base, and a contact portion of the piezoelectric motor contacts the carrier.

In a third aspect, an embodiment of the present application provides an electronic device, including:

a housing;

a piezoelectric motor provided in the housing, the piezoelectric motor being the piezoelectric motor according to any one of the first aspect; or

The camera module is arranged in the shell and is any one of the camera modules in the second aspect.

In the embodiment of the present application, by providing the piezoelectric body on the mount pad and connecting the first conductor and the second conductor to the piezoelectric body, the first conductor can be used as the first electrode and the second conductor can be used as the second electrode, and the power supply can be turned on to the piezoelectric body. When the piezoelectric body is electrified, the piezoelectric body can deform under the action of electric charges, so that the second conductor connected with the piezoelectric body is driven to move. Meanwhile, the second electric conductor comprises the abutting part abutting against the carrier, so that friction force exists between the abutting part and the carrier, the carrier can be driven to move through the friction force, and the purpose of driving the lens on the carrier is achieved. Because the piezoelectric motor drives the carrier to move by utilizing the deformation of the piezoelectric body, and the piezoelectric body can be repeatedly electrified to carry out high-frequency oscillation, namely can repeatedly deform, so that the piezoelectric body can drive the carrier to move through multiple times of deformation under the condition that the piezoelectric body does not move, the driving force is strong, and the occupied space is small. Even install heavier camera lens on the carrier, also can be promoted to realize the purpose that the camera lens zooms, be favorable to using the structure more complicated, the bigger camera lens of weight, thereby promote the performance of shooing. In addition, a part of the second conductor is used as a second electrode, and the second conductor further comprises a butting part, namely the second electrode and the butting part are arranged on one component, so that the number of the components is reduced, the size of the piezoelectric motor is further reduced, and the space is saved.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic perspective exploded view of a piezoelectric motor according to one embodiment of the present application;

FIG. 2 is a schematic partial perspective view of a piezoelectric motor according to one embodiment of the present application;

FIG. 3 is a schematic partial perspective view of a piezoelectric motor according to another embodiment of the present application;

FIG. 4 is a schematic partial perspective view of a piezoelectric motor according to yet another embodiment of the present application;

FIG. 5 is a schematic partial perspective view of a piezoelectric motor according to another embodiment of the present application;

FIG. 6 is a schematic partial perspective view of a piezoelectric motor according to another embodiment of the present application;

FIG. 7 is a schematic diagram of a partial side view of a piezoelectric motor according to yet another embodiment of the present application;

fig. 8 is a schematic perspective exploded view of a camera module according to an embodiment of the present application;

fig. 9 is a schematic perspective view of a camera module according to an embodiment of the present application;

fig. 10 is a schematic partial perspective view of a camera module according to another embodiment of the present application;

fig. 11 is a schematic perspective view of a camera module according to another embodiment of the present application;

fig. 12 is a schematic front view of a camera module according to an embodiment of the present application;

fig. 13 is a schematic partial structure diagram of a camera module according to an embodiment of the present application;

fig. 14 is a schematic partial structure diagram of a camera module according to another embodiment of the present application;

fig. 15 is a schematic partial structure diagram of a camera module according to another embodiment of the present application;

fig. 16 is a schematic partial structure diagram of a camera module according to another embodiment of the present application;

fig. 17 is a schematic view of a partial structure of a camera module according to another embodiment of the present application;

fig. 18 is a schematic partial structure diagram of a camera module according to another embodiment of the present application;

fig. 19 is a schematic view of a partial structure of a camera module according to another embodiment of the present application;

FIG. 20 is a schematic illustration of voltage versus time for a piezoelectric motor according to one embodiment of the present application;

FIG. 21 is a schematic voltage versus time diagram of a piezoelectric motor according to another embodiment of the present application;

FIG. 22 is a voltage versus time diagram of a piezoelectric motor according to another embodiment of the present application;

FIG. 23 is a schematic voltage versus time diagram of a piezoelectric motor according to another embodiment of the present application;

FIG. 24 is a schematic voltage versus time diagram of a piezoelectric motor according to another embodiment of the present application;

FIG. 25 is a schematic representation of displacement versus time of a carrier according to one embodiment of the present application;

FIG. 26 is a voltage versus time diagram of a piezoelectric motor according to another embodiment of the present application;

FIG. 27 is a schematic representation of displacement versus time of a carrier according to another embodiment of the present application;

FIG. 28 is a schematic diagram of the electrical movement of a piezoelectric body according to one embodiment of the present application;

FIG. 29 is a block diagram schematic of a structure of an electronic device according to one embodiment of the present application;

fig. 30 is a block diagram schematically illustrating the structure of an electronic device according to another embodiment of the present application.

Reference numerals are as follows:

the piezoelectric device comprises a piezoelectric motor 10, a mounting seat 100, a piezoelectric body 102, a first conductor 104, a first connecting part 1040, a first electric connecting part 1042, a second conductor 106, a second connecting part 1060, a second electric connecting part 1062, an abutting part 1064, a camera module 20, a carrier 200, a base 202, an elastic body 204, an abrasion-resistant layer 206, a sensor 208, a circuit board 210, a shell 212, a containing groove 214, a relief hole 216, an electronic device 30 and a shell 300.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of those features. In the description of the present application, "a plurality" means two or more unless otherwise specified. Further, "and/or" in the specification and claims means at least one of the connected objects.

In the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

A piezoelectric motor, an image pickup module, and an electronic apparatus according to an embodiment of the present application are described below with reference to fig. 1 to 30.

As shown in fig. 1 to 7, a piezoelectric motor 10 according to some embodiments of the present application, for driving a carrier 200, includes a mounting base 100, a piezoelectric body 102, a first conductive body 104, and a second conductive body 106. The piezoelectric body 102 is provided on the mount 100. The first conductor 104 is connected to one end of the piezoelectric body. The first conductor 104 is used as a first electrode. The second conductor 106 is connected to the other end of the piezoelectric body 102. The second conductor 106 is movable with the piezoelectric body 102. The second conductor 106 is used as a second electrode. The second electrical conductor 106 includes an abutment 1064, and the abutment 1064 is configured to abut against the carrier 200 and drive the carrier 200 to move. The first and second conductors are used to connect a power supply, and when the piezoelectric body 102 is energized, the piezoelectric body deforms, and the carrier 200 is driven to move by the abutting portion 1064.

According to the piezoelectric motor 10 of the embodiment of the present application, the piezoelectric body 102 is disposed on the mounting base 100, and the carrier 200 is driven to move by electrifying the piezoelectric body 102 and utilizing the deformation characteristic of the piezoelectric body 102 in the electrified state. This kind of mode of utilizing deformation to drive carrier 200 motion drives power reinforce to be favorable to driving heavier camera lens, realize the purpose that the camera lens zooms, and then can adopt the structure more complicated, the bigger camera lens of weight, thereby promote the performance of shooing of cell-phone. The piezoelectric motor 10 as a driving mechanism does not require displacement, occupies a small space, has a simple structure, and is easily mounted on an electronic device 30 such as a mobile phone.

Specifically, the piezoelectric body 102 can be energized by providing the first conductor 104 as a first electrode and the second conductor 106 as a second electrode. The piezoelectric body 102 is deformable in an energized state, and is elongated or shortened. Since the second conductor 106 includes the abutting portion 1064, and the abutting portion 1064 is configured to abut against the carrier 200, a friction force is generated between the abutting portion 1064 and the carrier 200, and when the piezoelectric body 102 is deformed and extended or shortened, the second conductor 106 moves along with the extension or shortening of the piezoelectric body 102, so that the abutting portion 1064 can drive the carrier 200 to move by using the friction force. Further, since the piezoelectric motor 10 drives the carrier 200 to move by the elongation or contraction caused by the deformation of the piezoelectric body 102, the distance that the carrier 200 is driven by each deformation is very short, which is less than about 1 μm, and thus, the power needs to be repeatedly applied to repeatedly push the carrier 200 to move so as to move the carrier 200 to a longer distance.

More specifically, the present embodiment employs the deformation of the piezoelectric body as the driving force. By connecting the conductor to the piezoelectric body and applying current to both ends of the piezoelectric body, the piezoelectric body can be vibrated in a high frequency (generally, 20KHz or more) back and forth in a fixed direction. The piezoelectric body 102 is slowly electrified to the maximum value, so that the piezoelectric body 102 is slowly extended to drive the second conductor 106 to move, and the abutting part 1064 can drive the carrier 200 to move due to the friction force between the carrier 200 and the abutting part 1064 of the second conductor 106. When the piezoelectric body 102 is deformed by applying a current, the amount of current applied is rapidly reduced or the polarity of the current applied is reversed, so that the piezoelectric body 102 is rapidly retracted. At this time, the carrier 200 is in an inertial state and remains in place, and the second conductive body 106 moves in the opposite direction as the piezoelectric body 102 retracts. Thus, although the carrier 200 can not move for 1 micron due to each deformation of the piezoelectric body 102, the carrier 200 can be pushed to move for a long distance only by repeatedly electrifying and repeating the above processes, thereby realizing the purpose of zooming a heavier lens and improving the photographing performance.

Compared with an electromagnetic motor, the piezoelectric motor 10 pushes the carrier 200 to move through deformation, the driving force is strong, the carrier 200 can move only through repeated power-on and power-off, and the operation is convenient. In addition, because the piezoelectric motor 10 pushes the carrier 200 to move through deformation, the piezoelectric motor does not generate displacement by itself, and therefore basically, a displacement space does not need to be set for the piezoelectric motor 10, which is beneficial to reducing the space occupied by the piezoelectric motor 10, and transmission members such as a driving shaft are not needed on the piezoelectric motor 10, as long as the piezoelectric motor can be abutted against the carrier 200, the number of components is small, the connection is not needed, the installation is convenient, the occupied space is small, and the maintenance is easy. It should be noted that the second conductive body 106 is used as a second electrode, the second conductive body 106 includes the abutting portion 1064, and the second conductive body 106 is further connected to the piezoelectric body 102, so that one component achieves multiple functions, and the structure of the piezoelectric motor 10 is further simplified.

The mounting seat 100 is configured to facilitate supporting the piezoelectric body 102, and to provide protection for the piezoelectric body 102 to prevent the piezoelectric body 102 from being damaged. It is understood that the mounting base 100 is made of a non-conductive material.

Alternatively, the piezoelectric body 102 is a piezoelectric ceramic, and a piezoelectric ceramic having a high electrical property and a high dielectric constant can be processed into any shape, so that a layout can be easily provided in a small electronic device 30 such as a mobile phone, and a narrow space can be fully utilized.

In other embodiments according to the present application, the piezoelectric body 102 is a piezoelectric crystal, which has high stability and high mechanical quality factor. Alternatively, the piezoelectric body 102 may be made of a piezoelectric polymer such as polyvinylidene fluoride or other organic piezoelectric materials typified by the above. The material has the advantages of flexibility, low density, low impedance, high voltage constant and the like.

According to some embodiments of the present application, the first electrical conductor 104 includes a first connection portion 1040 and a first electrical connection portion 1042. The first connecting portion 1040 is provided between the mounting seat 100 and the piezoelectric body 102, and one side of the first connecting portion 1040 is connected to the piezoelectric body and the other side is connected to the mounting seat. In this way, the first connecting portion 1040 can be pressed against the mounting seat 100 by the piezoelectric body 102, and a connecting structure is not required. In some practical applications, the piezoelectric body 102 and the mounting base 100 are bonded to both sides of the first connecting portion 1040. Since the piezoelectric body 102 does not displace itself but only deforms during the process of pushing the carrier 200, the first connection portion 1040 of the first conductor 104 can be always pressed between the mounting seat 100 and itself, thereby ensuring the stability of the fixation of the first conductor 104. Meanwhile, the first conductor 104 is pressed between the mount 100 and the piezoelectric body 102, and can maintain contact with the piezoelectric body 102, so that a current can be maintained to stably flow between the first conductor 104 and the piezoelectric body 102. The first electrical connecting portion 1042 is connected to the first connecting portion 1040, and the first electrical connecting portion 1042 is used for connecting one end of a power supply. The first electrical connection portion 1042 transmits a current to the piezoelectric body 102 through the first connection portion 1040, thereby deforming the piezoelectric body 102.

Alternatively, the first electrical connecting portions 1042 and 1040 may be formed in an L-shape, which is advantageous in increasing the area of the first connecting portions 1040 to facilitate connection with a power source. The L-shaped first conductive body 104 facilitates the first connection portion 1040 to abut against the piezoelectric body 102, thereby reducing the overall space occupied by the two. The L-shaped first conductor 104 also facilitates the first connecting portion 1040 to limit the displacement of the first connecting portion 1042 in one direction, thereby improving the stability and reliability of the operation of the first conductor 104 itself.

In a further embodiment, as shown in FIG. 2, the second conductor 106 further includes a second electrical connection portion 1062 and a second connection portion 1060. The second electric connection part 1062 is used for connecting the other end of the power supply. One end of the second connection portion 1060 is connected to the second electrical connection portion 1062, the other end of the second connection portion 1060 is connected to the abutting portion 1064, and the second connection portion 1060 is further fixedly connected to the piezoelectric body 102, so that the second electrical connection portion 1062 and the abutting portion 1064 are respectively located at two sides of the piezoelectric body 102, accordingly, the positions of the power supplies on the carrier 200 and the piezoelectric motor 10 can be staggered, the operation is convenient when the power supplies are connected, and the movement of the carrier 200 is not affected by the power supplies.

Further, the abutting portion 1064 is provided in suspension. The abutting portion 1064 is provided in a floating manner, that is, one end of the abutting portion 1064 is connected to the second connection portion 1060, and the other end of the abutting portion 1064 is a free end. With such a structure, the second conductor 106 has a certain elasticity on the side of the abutting portion 1064. When the abutting portion 1064 abuts against the carrier 200, the abutting portion 1064 has a certain movable space, and particularly when the mutual pressure is relatively large, the abutting portion 1064 rotates at a certain distance, so that the influence of the pressure on the carrier 200 can be reduced, and the abutting portion 1064 is prevented from being damaged due to the excessive pressure. Further, the abutting portion 1064 is provided in a floating manner, and it is possible to prevent the piezoelectric body 102 from being damaged by transmitting all the pressure on the carrier 200 to the piezoelectric body 102.

According to some embodiments of the present application, the second electrical connection 1062 on the second electrical conductor 106 is also suspended. The second electric connection part 1062 is arranged in a suspended manner, so that the bonding pad can be conveniently connected, and the problem of connection and separation caused by the telescopic movement of the piezoelectric material can be prevented. In addition, a certain symmetry can be maintained with respect to the abutting portion 1064, thereby improving the stability and reliability of the operation of the second electrical conductor 106.

In order to reduce the space occupied by the second conductive body 106 and make the piezoelectric motor 10 more compact, a bending structure is provided between the abutting portion 1064 and the second connecting portion 1060, so that the abutting portion 1064 can abut against the carrier 200 on the side of the piezoelectric motor 10 without occupying too much space. In addition, the bent structure is provided, so that the abutting portion 1064 can shift the displacement after being pressed, and the second conductor 106 and the piezoelectric body 102 are not easily torn or separated from each other when the tape carrier 200 moves. Similarly, a bending structure is provided between the second connecting portion 1062 and the second connecting portion 1060, which can also reduce the space occupied by the entire piezoelectric motor 10 and make the structure more compact.

According to some embodiments of the present application, the first electrical conductor 104 and the second electrical conductor 106 are both metallic electrical conductors. Further, a sheet metal conductor is used. The first conductor 104 and the second conductor 106 are both configured to be sheet-shaped structures, so that the volume is small, the occupied space is small, and the processing and the production are easy. The sheet metal conductor has certain elasticity and high strength. Thus, the second conductor 106 can withstand a large pressure when it is pressed against the carrier 200, and is not easily broken.

Since the abutment 1064 frictionally moves the carrier 200, when the power is turned off or turned on rapidly, the abutment 1064 also moves rapidly relative to the carrier 200, thereby repeatedly rubbing against the carrier 200. In order to reduce the wear of the carrier 200 and the abutment 1064, the abutment 1064 is provided with a wear layer 206, which can prolong the service life of the abutment 1064 and the carrier 200 and improve the stability and reliability of the operation of the apparatus.

It should also be noted that the use of metallic conductors also provides better wear resistance.

According to some embodiments of the present application, the second electrical conductor 106 is integrally formed with the piezoelectric body 102. The integral structure is advantageous to ensure that the second conductive body 106 moves following the deformation of the piezoelectric body 102.

According to further embodiments of the present application, a first conductor 104 is disposed at one end of the piezoelectric body 102, and a second conductor 106 is disposed at the other end of the piezoelectric body 102, and accordingly, the first electrode and the second electrode are naturally separated, so that current flows from one end of the piezoelectric body 102 to the other end, and the piezoelectric body 102 is energized. This is also advantageous to avoid short-circuiting and the like due to the close distance between the two electrodes.

As shown in fig. 8 to 19, according to an embodiment of the second aspect of the present application, there is provided a camera module 20, including: a base 202, a carrier 200, and a piezoelectric motor 10. The base 202 has a receiving groove 214, and the carrier 200 is disposed in the receiving groove 214. The carrier 200 is used to carry a lens. An avoiding hole 216 for avoiding the lens is arranged on the base 202 and the carrier 200. The piezoelectric motor 10 is the piezoelectric motor 10 according to any one of the embodiments of the first aspect described above. The piezoelectric motor is also provided on the base 202, and the abutting portion 1064 of the piezoelectric motor 10 abuts against the carrier 200.

By adopting the piezoelectric motor 10 according to any one of the embodiments of the first aspect, all the advantages of any one of the embodiments of the first aspect are achieved, and details are not repeated here. The abutting portion 1064 of the piezoelectric motor 10 abuts against the carrier 200, and when the piezoelectric motor 10 is electrically energized to deform and extend or shorten, the carrier 200 is driven to move, so that the lens carried on the carrier 200 moves accordingly.

The carrier 200 and the piezo motor 10 are disposed on the base 202, which facilitates mounting of the carrier 200 and the piezo motor 10 as a unit, and the movement of the carrier 200 is also performed on the base 202, which is advantageous to avoid affecting the operation of other components.

The camera module 20 further includes: a plurality of elastic bodies 204, the plurality of elastic bodies 204 being disposed along the circumferential surface of the accommodation groove 214 in a dispersed manner; the carrier 200 also abuts the plurality of resilient bodies 204. The carrier 200 is abutted against the plurality of elastic bodies 204, so that the carrier 200 is pressed by the elastic force of the elastic bodies 204, and the position of the carrier 200 is relatively fixed. That is, by providing a plurality of elastic bodies 204, a function of clamping can be performed. At the same time, the piezoelectric body 102 and the elastic body 204 also abut against the carrier 200, thereby functioning together to hold the carrier 200. The arrangement of the elastic bodies 204 makes the number of stress points on the carrier 200 large, thereby facilitating the reduction of the pressure of each stress point, and improving the uniformity and balance of the stress of the carrier 200, so that the working stability of the lens can be ensured when the lens moves along with the piezoelectric motor 10. The elastic body 204 and the piezoelectric body 102 are used for clamping the carrier 200, so that the elasticity of the elastic body 204 can be conveniently utilized to play a certain pre-tightening role for the carrier 200. In addition, as the piezoelectric body 102 is continuously extended and shortened when being switched between the power-on state and the power-off state, the pressure on the carrier 200 is correspondingly changed, and the carrier 200 is clamped by the plurality of elastic bodies 204 and the piezoelectric motor 10, so that the pressure on the carrier 200 can be favorably adjusted along with the power-on and power-off states of the piezoelectric motor 10, and the vibration caused by the repeated deformation of the piezoelectric motor 10 can be absorbed to a certain extent, thereby maintaining the stability of the carrier 200 and the lens.

Alternatively, the elastic body 204 may be a metal elastic sheet, or may be a rubber body or a plastic elastic sheet.

As shown in fig. 11 and 12, in some embodiments, the base 202 has a substantially quadrilateral shape, and the piezoelectric motor 10 is disposed at one of four corners of the quadrilateral shape, and the elastic bodies 204 are disposed at the other three corners of the quadrilateral shape. The three elastic bodies 204 and the piezoelectric motor 10 form a four-corner clamping, so that the carrier is more balanced when moving. The stress points of the carrier 200 are also approximately symmetrical, which is beneficial to improving the uniformity of the stress of the carrier 200, and when the carrier 200 moves, the arrangement of the plurality of elastic bodies 204 can also play a role of a guide rail, so that the carrier 200 is not easy to deviate.

According to some embodiments of the present application, not only the abutting portion 1064 of the piezoelectric motor 10 is provided with the wear-resistant layer 206, but also the wear-resistant layer 206 is provided on the carrier 200 at a position abutting against the abutting portion 1064. This is beneficial to extending the service life of the carrier 200 and improving the stability of the carrier 200. In addition, during the movement of the carrier 200, friction may occur with the elastic body 204, and therefore, a wear-resistant layer 206 is also provided on the carrier 200 at a position corresponding to the elastic body 204.

As shown in fig. 10, in other embodiments according to the present application, only the carrier 200 is provided with the wear layer 206.

As shown in fig. 11 and 12, according to a further embodiment of the present application, the camera module 20 further includes a sensor 208, such as a hall element, a photoelectric displacement sensor, or the like. The sensor 208 is coupled to the carrier 200 and is used to sense the position of the carrier 200. The sensor 208 is also used for feeding back the position of the carrier 200, so that the movement distance of the carrier 200 can be accurately controlled, the focal length change of the lens can be controlled, and the photographing precision can be improved.

As shown in fig. 11, further, the sensor 208 is disposed apart from the piezoelectric motor 10. Generally, the sensor 208 is more hall-element. The hall element is a magnetic sensor, and electromagnetic interference easily occurs between the hall element and the piezoelectric motor 10. The two are arranged at intervals, so that the electromagnetic interference between the two can be reduced.

According to some embodiments of the present application, the camera module 20 further includes a circuit board 210. The circuit board 210 is disposed on the base 202. The circuit board 210 is connected to the piezoelectric motor 10 and also to the sensor 208. The circuit board 210 is used to connect an external power source to energize the piezo motor 10 and the sensor 208.

Optionally, the circuit board 210 is a flexible circuit board. The first and second electrodes of the piezoelectric motor 10 are respectively connected to a flexible printed circuit board, that is, the first electrical connection portions 1042 and the second electrical connection portions 1062 are respectively connected to the flexible printed circuit board as a power source.

In addition to the base 202, the camera module 20 includes a housing 212. The housing 212 is disposed over the base 202. By arranging the housing 212 and matching with the base 202, the piezoelectric motor 10, the carrier 200 and other components can be integrated into a whole to form a modular structure, so that the integrated installation on the electronic equipment 30 such as a mobile phone is facilitated, and the convenience of assembly is improved.

The camera module 20 further includes a lens, which is disposed on the carrier 200 to move along with the carrier 200, so as to achieve the purpose of zooming the lens.

It should be noted that, in some related arts, the driving mechanism and the clamping structure of the carrier are designed as a single body, and the installation and maintenance are inconvenient. According to the camera module of the embodiment of the application, the driving mechanism of the carrier is a piezoelectric motor, and a split structure is arranged between the piezoelectric motor and the carrier. The piezoelectric motor drives the carrier to move through deformation and friction force, when the carrier moves, the piezoelectric motor does not move along with the carrier, the mounting seat of the piezoelectric motor does not move, and the elastic body for clamping the carrier does not move. The structure is simple, the carrier and the piezoelectric motor do not need to be connected, and the installation and maintenance are easy.

As shown in fig. 29, an electronic device 30 is provided according to an embodiment of the third aspect of the present application. The electronic device 30 includes a chassis 300 and a piezoelectric motor 10. The piezo motor 10 is disposed in the housing 300. The piezoelectric motor 10 is the piezoelectric motor 10 according to any one of the embodiments of the first aspect described above.

By adopting the piezoelectric motor 10 according to any one of the embodiments of the first aspect, all the advantageous effects of the embodiments are achieved, and the description thereof is omitted. The housing 300 is provided to provide a receiving space for the piezo motor 10 and other components.

As shown in fig. 30, in other embodiments according to the present application, the electronic device 30 includes a housing 300 and a camera module 20. The camera module 20 is disposed in the housing 300. The camera module 20 is the camera module 20 according to any of the embodiments of the second aspect.

By adopting the camera module 20 according to any one of the embodiments of the second aspect, all the beneficial effects of the embodiments are achieved, and are not described herein again. The housing 300 is provided to provide a space for accommodating the camera module 20 and other components.

The electronic device 30 includes any one of a mobile phone, a tablet computer, a digital camera, and a palm computer.

According to the camera module 20 of the present disclosure, a design solution for an auto-focus motor with a counterweight lens can be provided. At the same time, the problem of magnetic interference can be reduced.

Specifically, the camera module 20 of the present embodiment includes a piezoelectric motor 10, a carrier 200, a circuit board 210, a hall element (i.e., a sensor 208), a spring (i.e., an elastic body 204), a base 202, and a housing 212. The housing 212 serves to protect the piezoelectric motor 10. The base 202 is used for fixing the elastic sheet and the circuit board 210 and sealing the bottom of the piezoelectric motor 10. The circuit board 210 is a flexible circuit board that leads the electrodes of the piezoelectric body 102 and the hall element to the outside.

The number of the elastic sheets is multiple, and the elastic sheets are fixed on the base 202. The elastic pieces serve to restrict the position of the carrier 200 and serve as a guide rail for the carrier 200. A hall element is used as a sensor 208, connected to the carrier 200, and providing position feedback. The carrier 200 is used for carrying a lens, and the carrier 200 is provided with an abrasion resistant layer 206. The wear layer 206 serves to protect the carrier 200 from failure after multiple actuations have resulted in wear of the carrier 200.

The piezoelectric motor 10 includes a piezoelectric body 102, a mount 100, a first electrical conductor 104, and a second electrical conductor 106. The piezoelectric body 102 is electrically energized to change its expansion and contraction. The mounting base 100 is not conductive in itself, and the mounting base 100 is used to support and protect the piezoelectric body 102. The first conductor 104 is embedded with metal for fixing the piezoelectric body 102, and is connected to the circuit board 210 as a first electrode of the piezoelectric body 102. The second conductor 106 is made of a metal sheet. The second conductor 106 is integrally formed with the piezoelectric body 102. The second conductor 106 pushes and restricts the movement of the carrier 200, and is connected to the circuit board 210 as a second electrode of the piezoelectric body 102.

The piezoelectric body 102, the case 212, the first conductor 104, and the second conductor 106 are integrally assembled to form the piezoelectric motor 10.

The first electrode and the second electrode are two electrodes drawn from the piezoelectric body 102, and function to energize the piezoelectric body 102.

As shown in fig. 8, the camera module 20 includes a housing 212, a carrier 200, a spring (i.e., an elastic body 204), a piezoelectric motor 10, a hall element (i.e., a sensor 208), a base 202, and a circuit board 210.

As shown in fig. 1, the piezoelectric motor 10 includes a first conductor 104, a second conductor 106, a piezoelectric body 102, and a mount 100.

The connection relationship of the components integrally formed by the camera module 20 is as follows:

as shown in fig. 9, the base 202 is connected: the base 202 is mainly used for carrying the fixed circuit board 210, the piezoelectric motor 10 and the elastic sheet (the elastic body 204).

As shown in fig. 10 and 11, the carrier 200 is connected: the carrier 200 is primarily used to carry the wear layer 206 and the hall element (sensor 208). The camera module 20 is formed by the connection of the wear-resistant layer 206 and the piezoelectric motor 10, and the housing 212.

The connection relationship of the components of the piezoelectric motor 10 is as follows:

as shown in fig. 2, the second conductor 106 is connected: the second conductor 106 is integrally formed with the piezoelectric body 102. The second conductor 106 is made of a metal sheet, and after the metal sheet is formed, the piezoelectric body 102 is formed on the surface of the metal sheet with the metal sheet as a reference. One end of the metal sheet is suspended for connecting the bonding pad, and meanwhile, the problem of connection and separation caused by the stretching and moving of the piezoelectric body 102 can be prevented. The other end of the metal sheet is also designed to be suspended, one section of the metal sheet is used for supporting the wear-resistant layer 206, the tail end of the metal sheet is not fixed, and the displacement after being pressed can be transferred to the position to prevent the piezoelectric body 102 from being cracked due to overlarge pressure.

Mount 100 connection relation of piezoelectric motor 10: as shown in fig. 3 and 4, the first conductor 104 is embedded before the mount 100 of the piezoelectric motor 10 is molded. The first conductor 104 (e.g., using an embedded metal sheet) is made to be one electrode of the piezoelectric motor 10.

Finished state of the piezoelectric motor 10: as shown in fig. 5 and 6, the piezoelectric body 102 is connected to the first conductor 104. The first conductor 104 and the second conductor 106 lead the positive and negative electrodes of the piezoelectric body 102.

According to an embodiment of an example of the present application:

the following description will be made on the principle of the piezoelectric body 102 pushing the carrier 200 to move:

state 1: as shown in fig. 7, when the piezoelectric motor 10 is not energized, the piezoelectric body 102 is in a stationary state. As shown in fig. 13, due to the assembly relationship, the wear layer 206 needs to press the second conductor 106, which causes the second conductor 106 to deform, resulting in a pressure lock on the carrier 200, so that the carrier 200 maintains a static state, thereby achieving a self-locking function.

State 2: as shown in fig. 20, the piezoelectric body 102 is slowly energized, and as shown in fig. 14, the piezoelectric body 102 is in a slowly elongated state. At this time, the second conductor 106 connected to the piezoelectric body 102 is gradually raised along with the extension of the piezoelectric body 102, and the carrier 200 is lifted due to the friction between the second conductor 106 and the wear-resistant layer 206.

State 3: as shown in fig. 21, the piezoelectric body 102 is energized to a maximum value, and the power is momentarily turned off or the electrode is replaced (the direction of current is switched), and as shown in fig. 15, the piezoelectric body 102 contracts rapidly. At this time, the second conductor 106 connected to the piezoelectric body 102 moves down with the contraction of the piezoelectric body 102, and the carrier 200 is stopped at the original position by the frictional force much smaller than the contraction force of the piezoelectric body 102 and the inertial action.

And 4: as shown in fig. 22, when the piezoelectric body 102 is energized rapidly, the piezoelectric body 102 is in a rapidly elongated state as shown in fig. 16. At this time, the second conductor 106 connected to the piezoelectric body 102 rises as the piezoelectric body 102 expands, and the carrier 200 is stopped at the original position by the frictional force much smaller than the contraction force of the piezoelectric body 102 and the inertial action.

And state 5: as shown in fig. 23, when the piezoelectric body 102 is slowly energized to a minimum value, the piezoelectric body 102 slowly contracts as shown in fig. 17. At this time, the second conductor 106 connected to the piezoelectric body 102 is gradually lowered along with the contraction of the piezoelectric body 102, and the carrier 200 is lowered due to the friction between the second conductor 106 and the wear-resistant layer 206.

As shown in fig. 18, 24 and 25, the carrier 200 can be raised continuously by repeating the above states 2 and 3. In which fig. 24 shows the voltage versus time and fig. 25 shows the displacement of the carrier versus time.

As shown in fig. 19, 26 and 27, the carrier 200 can be continuously lowered by repeating the above states 4 and 5. In which fig. 26 shows the voltage versus time and fig. 27 shows the displacement of the carrier versus time.

As shown in fig. 12, in the embodiment of the present application, since there is only one hall element on the piezoelectric motor 10, the magnetic interference problem can be avoided by avoiding the hall element position.

As shown in fig. 28, when current is applied to both ends of the piezoelectric body 102, the piezoelectric body 102 moves in the corresponding direction. This solution is only effective for the piezoelectric body 102 of the type of fig. 28. U in fig. 28 represents a voltage.

The beneficial effects of this embodiment:

1. the camera lens with larger weight can be pushed, so that the photographing effect is better.

2. The magnetic interference problem is reduced.

3. The spring plate of the conventional motor is not limited, and a larger focusing range can be achieved.

Other configurations of the camera module according to the embodiment of the present application, such as specific configurations of the lens, circuit board structures, etc., and operations, are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (11)

1. A piezoelectric motor for driving a carrier, comprising:

a mounting base;

the piezoelectric body is arranged on the mounting seat;

a first conductor connected to one end of the piezoelectric body, the first conductor serving as a first electrode;

a second conductor connected to the other end of the piezoelectric body, the second conductor serving as a second electrode, the second conductor including an abutting portion that abuts against the carrier;

the first conductor and the second conductor are used for being connected with a power supply, and when the piezoelectric body is electrified, the piezoelectric body deforms and drives the carrier to move through the abutting part;

the second electrical conductor further comprises:

the second power connection part is used for connecting the other end of the power supply;

and one end of the second connecting part is connected with the second power connection part, the other end of the second connecting part is connected with the abutting part, and the second connecting part is fixedly connected with the piezoelectric body.

2. The piezoelectric motor according to claim 1, wherein the first conductor comprises:

one side of the first connecting part is connected with the piezoelectric body, and the other side of the first connecting part is connected with the mounting seat;

and the first electric connection part is connected with the first connecting part and is used for connecting one end of a power supply.

3. The piezoelectric motor according to claim 1,

the abutting part and the second electric connection part are respectively arranged in a suspended mode.

4. The piezoelectric motor according to claim 1,

a bending structure is arranged between the abutting part and the second connecting part; and/or

And a bending structure is arranged between the second electric connection part and the second connection part.

5. The piezoelectric motor according to claim 1 or 2,

and the abutting part is provided with a wear-resistant layer.

6. The piezoelectric motor according to claim 1 or 2,

the second conductor is integrally formed with the piezoelectric body.

7. The utility model provides a module of making a video recording which characterized in that includes:

the base is provided with an accommodating groove;

the carrier is arranged in the accommodating groove and used for bearing a lens, and avoidance holes suitable for avoiding the lens are respectively formed in the base and the carrier;

the piezoelectric motor according to any one of claims 1 to 6, wherein the piezoelectric motor is provided on the base, and an abutting portion of the piezoelectric motor abuts against the carrier.

8. The camera module of claim 7, further comprising:

a plurality of elastic bodies which are arranged along the circumferential surface of the accommodating groove in a dispersed manner;

the carrier is also abutted against the plurality of elastic bodies.

9. The camera module of claim 7 or 8,

and the carrier is provided with a wear-resistant layer.

10. The camera module of claim 7 or 8, further comprising:

the sensor is connected with the carrier and used for sensing and feeding back the position of the carrier;

the sensor is spaced from the piezoelectric motor.

11. An electronic device, comprising:

a housing;

a piezoelectric motor disposed within the housing, the piezoelectric motor being in accordance with any one of claims 1 to 6; or

A camera module disposed in the housing, the camera module being in accordance with any one of claims 7 to 10.

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