CN114942505A

CN114942505A - Zoom camera module

Info

Publication number: CN114942505A
Application number: CN202110182408.5A
Authority: CN
Inventors: 袁栋立; 王启; 周胄; 郑程倡; 熊实; 沈耀栋; 王海涛; 廖书伟; 吴志涵
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2022-08-26
Anticipated expiration: 2041-02-08
Also published as: CN114942505B

Abstract

Disclosed is a variable-focus camera module, which includes: a zoom lens group provided with an optical axis, including a fixed portion, a zoom portion and a focusing portion; a photosensitive component corresponding to the zoom lens group; and, a drive assembly comprising: the zoom lens comprises a driving shell, a first carrier, a second carrier, a first driving element and a second driving element, wherein the first carrier, the second carrier, the first driving element and the second driving element are positioned in the driving shell, the zoom part is installed in the first carrier, the focusing part is installed in the second carrier, the first driving element is configured to drive the first carrier to drive the zoom part to move along the direction of an optical axis, and the second driving element is configured to drive the second carrier to drive the focusing part to move along the direction of the optical axis. In particular, the first drive element and/or the second drive element are/is embodied as a piezo actuator and are arranged in the variable focus camera module in a smart layout to meet the structural and dimensional requirements of the camera module.

Description

Zoom camera module

Technical Field

The present application relates to the field of camera modules, and more particularly, to a variable focus camera module, wherein the variable focus camera module employs a piezoelectric actuator as a driver to provide a sufficiently large driving force and a relatively better driving performance. And moreover, the piezoelectric actuator is arranged in the variable-focus camera module by adopting a reasonable arrangement scheme so as to meet the structural and dimensional design requirements of the variable-focus camera module.

Background

With the popularization of mobile electronic devices, technologies related to camera modules used in mobile electronic devices for helping users acquire images (e.g., videos or images) have been rapidly developed and advanced, and in recent years, camera modules have been widely used in many fields such as medical treatment, security, industrial production, and the like.

In order to meet the increasingly wide market demands, high pixels, large chips and small sizes are the irreversible development trend of the existing camera modules. As the photo-sensing chip is developed toward high pixels and large chips, the size of the optical lens fitted with the photo-sensing chip is gradually increased, which brings new challenges to a driving element for driving the optical lens for optical performance adjustment (e.g., optical focusing, optical anti-shake, etc.).

Specifically, the conventional driving element for driving the optical lens is an electromagnetic Motor, such as a Voice Coil Motor (VCM), a Shape Memory Alloy Actuator (SMA), and the like. However, as the optical lens increases in size and weight, the conventional electromagnetic motor has been unable to provide sufficient driving force to drive the optical lens to move. In quantification, the conventional voice coil motor and shape memory alloy driver are only suitable for driving an optical lens with a weight less than 100mg, that is, if the weight of the optical lens exceeds 100mg, the conventional driver cannot meet the application requirements of the camera module.

In addition, with the change and development of market demands, in recent years, an image pickup module configured in a terminal device is also required to be capable of realizing a zoom photographing function, for example, a demand for realizing a distant view photographing by an optical zoom. In comparison with a conventional camera module (e.g., a moving-focus camera module), the optical zoom camera module not only includes a lens having a larger size and weight, that is, a driver is required to provide a larger driving force, but also the driver for driving the lens to move is required to provide a driving performance with higher precision and longer stroke. The above technical requirements cannot be met by the conventional electromagnetic drive motor. Meanwhile, the conventional electromagnetic actuator has a problem of electromagnetic interference.

Therefore, a new driving scheme for the camera module with an adaptive function is needed, and the new driver can meet the development requirements of the camera module for light weight and thin type.

Disclosure of Invention

An advantage of the present application is to provide a variable focus camera module, wherein the variable focus camera module uses a piezoelectric actuator as a driver to provide a driving force large enough, and further, to provide a driving performance with higher precision and longer stroke, so as to meet the optical performance adjustment requirement of the variable focus camera module.

Yet another advantage of the present application is to provide a variable focus camera module, wherein the piezoelectric actuators are arranged in the variable focus camera module using a reasonable arrangement scheme, so as to satisfy the requirement that the variable focus camera module satisfies the structural and dimensional design requirements thereof.

It is yet another advantage of the present application to provide a variable focus camera module, wherein at least a portion of the piezoelectric actuator is disposed in an otherwise unused space in the variable focus camera module, so that the space in the variable focus camera module can be more fully utilized, and the compactness of the spatial arrangement of the variable focus camera module is improved.

Other advantages and features of the present application will become apparent from the following description and may be realized by means of the instrumentalities and combinations particularly pointed out in the appended claims.

In order to realize at least one of the above advantages, the present application provides a variable focus camera module, which includes:

a variable focus lens package provided with an optical axis, comprising: a fixed portion, a zoom portion, and a focus portion;

a photosensitive assembly corresponding to the zoom lens group; and

a drive assembly, comprising: the device comprises a driving shell, a first carrier, a second carrier, a first driving element and a second driving element, wherein the first carrier, the second carrier, the first driving element and the second driving element are positioned in the driving shell;

wherein the zoom portion is mounted in the first carrier, the focusing portion is mounted in the second carrier, the first driving element is configured to drive the first carrier to bring the zoom portion to move in the direction set by the optical axis, the second driving element is configured to drive the second carrier to bring the focusing portion to move in the direction set by the optical axis, wherein the first driving element and/or the second driving element is implemented as a piezoelectric actuator;

at least one first receiving channel is arranged between the bottom surface of the driving shell and the bottom surface of the first carrier, at least one second receiving channel is arranged between the bottom surface of the driving shell and the bottom surface of the second carrier, and at least one part of the piezoelectric actuator is arranged in the at least one first receiving channel or the at least one second receiving channel.

In the variable focus camera module according to the present application, the first drive element is implemented as a first piezoelectric actuator and the second drive element is implemented as a second piezoelectric actuator.

In the variable focus camera module according to the present application, at least a portion of the first piezoelectric actuator is disposed in the first receiving channel, and at least a portion of the second piezoelectric actuator is disposed in the second receiving channel.

In the zoom camera module according to the present application, the first piezoelectric actuator includes a first piezoelectric driving part, a first driven shaft driveably coupled to the first piezoelectric driving part, and a first driving part tightly fitted to the first driven shaft, wherein under the action of the first piezoelectric driving part and the first driven shaft, the first driving part is configured to drive the first carrier to move along a direction set by the optical axis; the second piezoelectric actuator comprises a second piezoelectric driving part, a second driven shaft which is driveably coupled to the second piezoelectric driving part, and a second driving part which is tightly matched with the second driven shaft, wherein under the action of the second piezoelectric driving part and the second driven shaft, the second driving part is configured to drive the second carrier to move along the direction set by the optical axis;

at least a part of the first driven shaft of the first piezoelectric actuator extends into the first receiving channel, and at least a part of the second driven shaft of the second piezoelectric actuator extends into the second receiving channel.

In a variable focus camera module according to the present application, the first piezoelectric actuator and the second piezoelectric actuator are disposed on a first side of the optical axis.

In the variable focus camera module according to the present application, the first piezoelectric actuator and the second piezoelectric actuator are respectively provided on a first side of the optical axis and a second side opposite to the first side.

In the variable focus camera module according to the present application, the first piezoelectric actuator and the second piezoelectric actuator are provided in different directions.

In the variable focus camera module according to the present application, the first piezoelectric actuator and the second piezoelectric actuator are provided in the same direction.

In the variable focus camera module according to the present application, the first piezoelectric actuator and the second piezoelectric actuator have the same mounting height with respect to the bottom surface of the drive housing.

In the variable focus camera module according to the present application, the first piezoelectric actuator and the second piezoelectric actuator are provided in different directions or in the same direction.

In the variable focus camera module according to the present application, the first piezoelectric active part of the first piezoelectric actuator is adjacent to the second piezoelectric active part of the second piezoelectric actuator.

In the variable focus camera module according to the present application, the first driven shaft of the first piezoelectric actuator is adjacent to a second driven shaft of the second piezoelectric actuator.

In the variable focus camera module according to the present application, the first piezoelectric active part of the first piezoelectric actuator is mounted to a first side wall of the drive housing, and the second piezoelectric active part of the second piezoelectric actuator is attached to a second side wall of the drive housing opposite to the first side wall.

In the variable focus camera module according to the present application, the driving assembly further comprises a guiding structure disposed on a second side of the optical axis opposite to the first side, the guiding structure being configured to guide the focusing portion and the zooming portion to move along a direction set by the optical axis.

In the zoom camera module according to the application, the guide structure includes: the optical axis-parallel driving device comprises a first supporting part and a second supporting part which are formed on the driving shell at intervals, and at least one guide rod which is erected between the first supporting part and the second supporting part and penetrates through the first carrier and the second carrier, wherein the guide rod is parallel to the optical axis, so that the first carrier and the second carrier can be guided to move along the direction set by the guide rod parallel to the optical axis.

In the variable focus camera module according to the present application, the driving assembly further includes a first guiding mechanism configured to guide the zoom portion to move along the direction set by the optical axis, and a second guiding mechanism configured to guide the focusing portion to move along the direction set by the optical axis.

In the zoom camera module according to the present application, the first guide mechanism includes a first mounting portion and a second mounting portion, and at least one first guide rod that is erected between the first mounting portion and the second mounting portion and that penetrates the first carrier, the first guide rod being parallel to the optical axis, so that the first carrier can be guided to move along a direction set by the first guide rod that is parallel to the optical axis; the second guide mechanism comprises a third installation part, a fourth installation part and at least one second guide rod which is erected between the third installation part and the fourth installation part and penetrates through the second carrier, and the second guide rod is parallel to the optical axis, so that the second carrier can be guided to move along the direction parallel to the optical axis and set by the first guide rod.

In the variable focus camera module according to the present application, the first guide rod and the second guide rod are flush with each other.

In the variable focus camera module according to the present application, a height of the first guide bar and the second guide bar with respect to the bottom surface of the driving housing is flush with a mounting height of the first driven shaft and the second driven shaft with respect to the bottom surface of the driving housing.

In the zoom camera module according to the present application, the first guide mechanism includes at least one ball disposed between the first carrier and the driving housing, and a receiving groove disposed between the first carrier and the driving housing for receiving the at least one ball.

In the zoom camera module according to the present application, the first guide mechanism includes: the sliding rail is arranged between the driving shell and the first carrier and is suitable for the sliding of the sliding block.

In the zoom camera module according to the present application, the second guide mechanism includes at least one ball disposed between the second carrier and the driving housing, and a receiving groove disposed between the second carrier and the driving housing for receiving the at least one ball.

In the zoom camera module according to the present application, the second guide mechanism includes: the sliding rail is arranged between the driving shell and the second carrier and is suitable for the sliding of the sliding block.

In the variable-focus camera module according to the application, the first carrier comprises a first carrier base and a first extension arm and a second extension arm which integrally extend upwards from the first carrier base respectively, so that a first mounting cavity for mounting the zooming part and a first opening communicated with the first mounting cavity are formed among the first carrier base, the first extension arm and the second extension arm.

In the variable focus camera module according to the present application, one of the first receiving channels is formed between a bottom surface of the first carrier base and a bottom surface of the drive housing, and another of the first receiving channels is formed between a bottom surface of the second extension arm and a bottom surface of the drive housing.

In the variable-focus camera module according to the application, the second carrier comprises a second carrier base, and a third extension arm and a fourth extension arm which integrally extend upwards from the second carrier base respectively, so that a second mounting cavity for mounting the focusing part and a second opening communicated with the second mounting cavity are formed among the second carrier base, the third extension arm and the fourth extension arm.

In the variable focus camera module according to the present application, one of the at least one second receiving channel is formed between a bottom surface of the third extension arm and a bottom surface of the driving housing, and another of the at least one second receiving channel is formed between a side surface of the second carrier base and a bottom surface of the fourth extension arm and a bottom surface of the driving housing.

In the zoom camera module according to the present application, the magnitude of the driving force generated by the piezoelectric actuator is 0.6N to 2N.

In the zoom camera module according to the present application, the first receiving channel and the second receiving channel are lower than the optical axis.

In the variable focus camera module according to the present application, a mounting height of the first driven shaft and the second driven shaft with respect to the bottom surface of the drive housing is lower than a height of the optical axis with respect to the bottom surface of the drive housing.

In the variable focus camera module according to the present application, the piezoelectric active part includes an electrode plate and at least one piezoelectric substrate stacked on the electrode plate.

In the zoom camera module according to the application, the at least one piezoelectric substrate includes a first piezoelectric substrate and a second piezoelectric substrate, and the electrode plate is sandwiched between the first piezoelectric substrate and the second piezoelectric substrate.

In the module of making a video recording of zooming according to the application, the module of making a video recording of zooming further includes: and the light blocking element is arranged on a photosensitive path of the photosensitive assembly.

In the module of making a video recording of zooming according to the application, the module of making a video recording of zooming further includes: and the light turning element is used for turning the imaging light to the zoom lens group.

In the module of making a video recording of can zooming according to the application, the module of making a video recording of can zooming further includes: a third driving element for driving the light turning element.

In the variable focus camera module according to the present application, the zoom portion and the focus portion are adjacently disposed.

In the variable focus camera module according to the present application, the zoom portion is located between the fixed portion and the focusing portion.

In the variable focus camera module according to the present application, the focusing portion is located between the fixed portion and the zooming portion.

Further objects and advantages of the present application will become apparent from a reading of the ensuing description and drawings.

These and other objects, features and advantages of the present application will become more fully apparent from the following detailed description, the accompanying drawings and the claims.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings, like reference numbers generally represent like parts or steps.

Fig. 1 illustrates a schematic diagram of a variable focus camera module according to an embodiment of the present application.

Fig. 2 illustrates a schematic diagram of an optical system of the variable focus camera module according to an embodiment of the present application.

Fig. 3 illustrates another schematic diagram of the variable focus camera module according to an embodiment of the present application.

Fig. 4 illustrates a schematic diagram of a specific example of a light-blocking element of the variable focus camera module according to an embodiment of the present application.

Fig. 5A and 5B illustrate schematic diagrams of a first driving element and a second driving element of the variable focus imaging module according to an embodiment of the present application.

Fig. 6A and 6B are schematic diagrams illustrating a modified embodiment of the first and second drive elements of the variable focus camera module according to an embodiment of the present application.

Fig. 7 is a schematic diagram illustrating a variant implementation of the variable focus camera module according to an embodiment of the present application.

Fig. 8A illustrates a schematic diagram of a variant implementation of the variable focus camera module according to an embodiment of the present application.

Fig. 8B illustrates another schematic diagram of the variable focus camera module illustrated in fig. 8A.

Fig. 9 illustrates a schematic diagram of another variant implementation of the guiding structure of the variable focus camera module according to an embodiment of the present application.

Fig. 10 is a schematic diagram illustrating a further variant implementation of the variable focus camera module according to an embodiment of the present application.

Detailed Description

Hereinafter, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of the present application and not all embodiments of the present application, and that the present application is not limited by the example embodiments described herein.

Summary of the application

As described above, the driving elements for driving the components of the camera module, such as the optical lens and the zoom component, are electromagnetic motors, such as Voice Coil Motors (VCM), Shape Memory Alloy actuators (SMA), and the like. Since the camera module is conventionally disposed along the thickness direction of an electronic apparatus such as a mobile phone, the components in the camera module tend to be thin and small, and in this case, the electromagnetic motor can provide a sufficient driving force. However, the structure and the positional relationship of the camera module relative to the electronic device are changed along with the periscopic camera module and other novel camera modules, that is, the camera module can be arranged along the length or the width direction of the electronic device, so that the camera module is not limited by the thickness direction of the electronic device, and the camera module can obtain a larger degree of freedom in the aspect of size increase.

Further, as the demand for the imaging performance of the camera module increases, higher demands are made on each component of the camera module, particularly the zoom component, and with the reduction of the limitation in terms of the increase in size, the component design of the camera module also brings about an increase in the size of the component in order to realize a stronger function, resulting in a further increase in the weight of the component. In this situation, the conventional electromagnetic motor can no longer provide enough driving force, and as a result, the conventional voice coil motor driver can only drive the optical lens with a weight less than 100mg, while the memory alloy motor requires a larger stroke space, that is, if the weight of the component to be driven in the camera module exceeds 100mg, the conventional driver cannot meet the application requirement of the camera module or needs to increase the size of the driver by a very large amount to provide a larger driving force, so that a new generation of driving scheme for the camera module must be developed.

Based on this, the technical route of the present application is to provide a design of a variable focus camera module based on a piezoelectric actuator capable of providing a larger driving force, so as to satisfy a demand for the driving force of a component after the component in a novel variable focus camera module is enlarged.

Here, as can be understood by those skilled in the art, since the technical requirements of the novel variable-focus camera module are completely opposite to those of the conventional variable-focus camera module which needs to be miniaturized, a whole set of design solutions based on the technical requirements of the novel variable-focus camera module is required in the technical route for the novel variable-focus camera module, rather than simply applying the novel actuating element to the design of the conventional variable-focus camera module.

Specifically, the technical scheme of this application provides a module of making a video recording of zooming, includes: a zoom lens group comprising: the zoom lens comprises a fixed part, a zooming part and a focusing part, wherein the zooming lens group is provided with an optical axis; a photosensitive component corresponding to the zoom lens group; and, a drive assembly comprising: a driving housing, at least one driving element located in the driving housing, wherein the at least one driving element is disposed at a first side of the zoom lens group, configured to drive the zoom portion and/or the focus portion to move along the optical axis, and the at least one driving element is a piezoelectric actuator.

In this way, by configuring the overall structure of the variable focus camera module based on the piezoelectric actuator capable of providing a greater driving force, using the piezoelectric actuator as a driving element of the zoom portion and/or the focus portion that needs to be moved, it is possible to drive the optical components of the variable focus camera module having a greater weight, that is, optical components having a weight much greater than 100mg, for example, up to a weight of more than 1 gram. Moreover, even if the stroke provided by the single deformation of the piezoelectric actuator is limited, the optical component to be moved can be moved for a long distance in a mode of superposing the strokes provided by multiple deformations, and the time of the single deformation and recovery of the piezoelectric actuator is short, so that the requirement on zooming time can be completely met.

It should be noted that the variable focus camera module according to the embodiment of the present application is implemented as a variable focus periscopic camera module. Of course, it should be understood by those skilled in the art that, although the variable-focus camera module is implemented as a variable-focus periscopic camera module in the embodiment of the present application, in other examples of the present application, the variable-focus camera module may also be implemented as other types of camera modules, and is not limited by the present application.

Furthermore, it can be understood by those skilled in the art that, although the embodiment of the present application is described by taking a piezoelectric actuator as an example, the technical solution of the variable focus camera module according to the embodiment of the present application can also be applied to other actuators capable of providing a larger driving force, besides the piezoelectric actuator, and the present application is not intended to limit the present application in any way.

Exemplary variable focus camera module

Fig. 1 illustrates a schematic diagram of a variable focus camera module according to an embodiment of the present application. As shown in fig. 1, the variable focus camera module according to the embodiment of the present application includes: a light turning element 10, a zoom lens group 20, a photosensitive assembly 30 and a driving assembly 40.

Accordingly, as shown in fig. 1 and 2, in the embodiment of the present application, the light turning element 10 is configured to receive an imaging light ray from a subject and turn the imaging light ray to the zoom lens group 20. In particular, in the embodiment of the present application, the light turning element 10 is configured to turn the imaging light from the object by 90 °, so that the overall height dimension of the variable focus camera module can be reduced. Here, in consideration of manufacturing tolerance, in an actual operation, an error of within 1 ° may exist in the angle at which the light bending element 10 bends the imaging light, as will be understood by those skilled in the art.

In a specific example of the present application, the light-turning element 10 may be implemented as a mirror (e.g., a plane mirror), or a light-turning prism (e.g., a triangular prism). For example, when the light turning element 10 is implemented as a light turning prism, the light incident surface and the light exiting surface of the light turning prism are perpendicular to each other and the light reflecting surface of the light turning prism is inclined at an angle of 45 ° to the light incident surface and the light exiting surface, so that when the imaging light enters the light turning prism perpendicularly to the light incident surface, the imaging light can be turned by 90 ° at the light reflecting surface and output from the light exiting surface perpendicularly to the light exiting surface.

Of course, in other examples of the present application, the light turning element 10 may also be implemented as other types of optical elements, and is not limited to the present application. In the embodiment of the present application, the variable focus camera module may further include a greater number of light turning elements 10, one reason for which is that: one function of introducing the light turning element 10 is: and (3) turning the imaging light so as to fold the optical system of the variable-focus camera module with a longer Total Track Length (TTL) in structural dimension. Accordingly, when the total optical length (TTL) of the zoom camera module is too long, a greater number of light turning elements 10 may be disposed to meet the size requirement of the zoom camera module, for example, the light turning elements 10 may be disposed at the image side of the zoom camera module or between two optical lenses.

As shown in fig. 1 and fig. 2, in the embodiment of the present application, the zoom lens group 20 corresponds to the light turning element 10, and is configured to receive the imaging light from the light turning element 10 to converge the imaging light. Accordingly, as shown in fig. 2, the variable focus lens package 20 includes, along its set optical axis direction: the zoom lens module comprises a fixed part 21, a zoom part 22 and a focusing part 23, wherein the fixed part 21 has a predetermined installation position, and the zoom part 22 and the focusing part 23 can be respectively adjusted relative to the position of the fixed part 21 under the action of the driving assembly 40, so that the adjustment of the optical performance of the variable focus camera module, including but not limited to optical focusing and optical zooming functions, is realized. For example, the zoom portion 22 and the focus portion 23 can be adjusted by the driving assembly 40, so that the focal length of the zoom lens group 20 of the variable focus camera module is adjusted, thereby clearly shooting objects at different distances.

In the embodiment of the present application, the fixing portion 21 includes a first barrel and at least one optical lens accommodated in the first barrel. Also, the fixed portion 21 is adapted to be fixed to a non-moving part in the driving assembly 40, such that the position of the fixed portion 21 in the variable focus lens package 20 remains constant.

It should be noted that in other examples of the present application, the fixing portion 21 may not be provided with the first lens barrel, and may only include at least one optical lens, for example, only include a plurality of optical lenses that are embedded with each other. That is, in other examples of the application, the fixing portion 21 may be implemented as a "bare lens".

The zoom portion 22 includes a second barrel and at least one optical lens accommodated in the second barrel, wherein the zoom portion 22 is adapted to be driven by the driving assembly 40 to move along the optical axis direction set by the zoom lens group 20, so as to implement an optical zoom function of the variable focus camera module, so that the variable focus camera module can achieve clear shooting of objects to be shot at different distances.

It should be noted that in other examples of the present application, the zoom portion 22 may not be provided with the second barrel, and only includes at least one optical lens, for example, only includes a plurality of optical lenses that are embedded with each other. That is, in other examples of the application, the zoom portion 22 may also be implemented as a "bare lens".

The focusing portion 23 includes a third barrel and at least one optical lens accommodated in the third barrel, wherein the focusing portion 23 is adapted to be driven by the driving assembly 40 to move along the optical axis direction set by the zoom lens group 20, so as to achieve the focusing function of the zoom camera module. More specifically, the optical focusing achieved by driving the focusing portion 23 can compensate for the focus shift caused by moving the zoom portion 22, thereby compensating for the imaging performance of the variable focus camera module so that the imaging quality thereof meets the preset requirements.

It should be noted that, in other examples of the present application, the focusing portion 23 may not be provided with the third barrel, and only includes at least one optical lens, for example, only includes a plurality of optical lenses that are embedded with each other. That is, in other examples of the application, the focusing portion 23 may also be implemented as a "bare lens".

More specifically, as shown in fig. 2, in the embodiment of the present application, the fixed portion 21, the zooming portion 22 and the focusing portion 23 of the zoom lens group 20 are sequentially disposed (i.e., in the zoom lens group 20, the zooming portion 22 is located between the fixed portion 21 and the focusing portion 23), i.e., the imaging light from the light turning element 10 will firstly pass through the fixed portion 21, then pass through the zooming portion 22 and then pass through the focusing portion 23 in the process of passing through the zoom lens group 20.

Of course, in other examples of the present application, the relative positional relationship among the fixed portion 21, the zoom portion 22, and the focus portion 23 may also be adjusted, for example, the fixed portion 21 is disposed between the zoom portion 22 and the focus portion 23, and the focus portion 23 is disposed between the zoom portion 22 and the fixed portion 21. It should be understood that, in the embodiment of the present application, the relative positional relationship among the fixing portion 21, the zooming portion 22 and the focusing portion 23 can be adjusted according to the optical design requirement and the structural design requirement of the variable focus camera module.

In particular, however, in the embodiment of the present application, in view of the structural design of the variable focus camera module (more specifically, to facilitate the layout of the driving assembly 40), it is preferable that the focusing portion 23 and the zooming portion 22 are adjacently disposed. That is, the positions of the respective portions in the variable focus lens group 20 according to the embodiment of the present application are preferably configured to: the zoom portion 22 is located between the fixed portion 21 and the focusing portion 23, or the focusing portion 23 is located between the fixed portion 21 and the zoom portion 22. It should be understood that the zooming portion 22 and the focusing portion 23 are portions of the zoom lens group 20 that need to be moved, and therefore, disposing the focusing portion 23 and the zooming portion 22 adjacent to each other facilitates the arrangement of the driving assembly 40, which will be described in detail in the detailed description of the driving assembly 40.

It should be noted that, in the example illustrated in fig. 2, although the variable focus lens group 20 including one of the fixed portions 21, one of the variable focus portions 22 and one of the focus portions 23 is taken as an example, it should be understood by those skilled in the art that, in other examples of the present application, the specific number of the fixed portions 21, the variable focus portions 22 and the focus portions 23 is selected and is not limited by the present application, and can be adjusted according to the optical design requirement of the variable focus camera module.

In order to limit the imaging light entering the photosensitive component 30, in some examples of the present application, the variable focus camera module further includes a light blocking element 50 disposed on the photosensitive path of the photosensitive component 30, wherein the light blocking element 50 can at least partially block the light from passing through, so as to reduce the influence of stray light on the imaging quality of the variable focus camera module as much as possible.

Fig. 4 illustrates a schematic diagram of a specific example of a light-blocking element 50 of the variable focus camera module according to an embodiment of the present application. As shown in fig. 4, in this specific example, the light blocking element 50 is installed at the light exit surface of the light turning element 10, wherein the light blocking element 50 has a light transmitting hole 500 adapted to allow an effective portion of the imaging light to pass through and block at least a portion of the stray light in the imaging light. Preferably, the light-transmitting hole 500 is a circular hole to match the circular effective optical area of the variable focus lens group 20, so as to reduce the influence of stray light on the imaging quality as much as possible.

It should be noted that, in other examples of the present application, the light blocking element 50 may be disposed at other positions of the light turning element 10, for example, a light incident surface or a light reflecting surface of the light turning element 10, which is not limited by the present application. It should also be noted that, in other examples of the present application, the light blocking element 50 may also be disposed on the photosensitive path of the photosensitive component 30 as a separate component, for example, as a separate component disposed between the light turning element 10 and the zoom lens group 20, and further, as a separate component disposed between the zoom lens group 20 and the photosensitive component 30, which is not limited by the present application.

As shown in fig. 1 and fig. 2, in the embodiment of the present application, the photosensitive assembly 30 corresponds to the zoom lens group 20, and is configured to receive imaging light from the zoom lens group 20 and perform imaging, where the photosensitive assembly 30 includes a circuit board 31, a photosensitive chip 32 electrically connected to the circuit board 31, and a filter element 33 held on a photosensitive path of the photosensitive chip 32. More specifically, in the example illustrated in fig. 1 and 2, the photosensitive assembly 30 further includes a support 34 provided on the circuit board 31, wherein the filter element 33 is mounted on the support 34 to be held on the photosensitive path of the photosensitive chip 32.

It should be noted that, in other examples of the present application, the specific implementation manner of the filter element 33 being held on the photosensitive path of the photosensitive chip 32 is not limited in the present application, for example, the filter element 33 may be implemented as a filter film and coated on a surface of a certain optical lens of the zoom lens group 20 to play a filtering effect, and for example, the photosensitive assembly 30 may further include a filter element support (not shown) mounted on the support 34, wherein the filter element 33 is held on the photosensitive path of the photosensitive chip 32 in a manner of being mounted on the filter element support.

As described above, in order to meet the increasingly wide market demand, high pixel, large chip, and small size are irreversible trends in the development of the existing camera module. As the photosensitive chip 32 progresses toward high pixels and large chips, the size of the zoom lens group 20 fitted to the photosensitive chip 32 also gradually increases, which puts new technical requirements on drivers for driving the focusing part 23 and the zooming part 22 of the zoom lens group 20.

The new technical requirements are mainly focused on two aspects: a relatively larger driving force, and a more excellent driving performance (specifically, including a more accurate driving control and a longer driving stroke). Further, in addition to the need to find a driver that meets new technical requirements, it is also necessary to consider that the selected driver can be adapted to the current trend of making the camera module lighter and thinner.

Through research and experiments, the inventor of the application finds that the technical requirements of the variable-focus camera module on the driver can be met by selecting the piezoelectric actuator. Specifically, as shown in fig. 1 and fig. 2, in the embodiment of the present application, the driving assembly 40 for driving the variable focus lens group 20 includes: a driving housing 41, a first carrier 44, a second carrier 45 and a first driving element 42 and a second driving element 43 located in the driving housing 41, wherein the zooming portion 22 is installed in the first carrier 44, the focusing portion 23 is installed in the second carrier 45, the first driving element 42 is configured to drive the first carrier 44 to drive the zooming portion 22 to move along the direction set by the optical axis, and the second driving element 43 is configured to drive the second carrier 45 to drive the focusing portion 23 to move along the direction set by the optical axis. In particular, in the present exemplary embodiment, the first drive element 42 and/or the second drive element 43 are embodied as piezo actuators, i.e. at least one of the first drive element 42 and the second drive element 43 is embodied as a piezo actuator.

Preferably, in the embodiment of the present application, the first driving element 42 and the second driving element 43 are implemented as piezoelectric actuators at the same time, and for convenience of illustration and description, the piezoelectric actuator of the first driving element 42 is defined as a first piezoelectric actuator 420, and the piezoelectric actuator of the second driving element 43 is defined as a second piezoelectric actuator 430. Also, more preferably, in the present embodiment, the first piezoelectric actuator 420 and the second piezoelectric actuator 430 are the same type of piezoelectric actuator.

Fig. 5A and 5B illustrate schematic diagrams of a first driving element and a second driving element of the variable focus camera module according to an embodiment of the present application. As shown in fig. 5A and 5B, in the embodiment of the present application, the first piezoelectric actuator 420 and the second piezoelectric actuator 430 are implemented as the same type of piezoelectric actuator, wherein the piezoelectric actuator 100 includes: the optical axis driving device comprises a piezoelectric driving part 110, a driven shaft 120 driveably coupled to the piezoelectric driving part 110, and a driving part 130 tightly fitted to the driven shaft 120, wherein the driving part 130 is configured to drive the first carrier 44 or the second carrier 45 to move along a direction set by the optical axis under the action of the piezoelectric driving part 110 and the driven shaft 120.

That is, in the embodiment of the present application, the first piezoelectric actuator 420 includes a first piezoelectric driving part 421, a first driven shaft 422 driveably coupled to the first piezoelectric driving part 421, and a first driving part 423 closely fitted to the first driven shaft 422, wherein under the action of the first piezoelectric driving part 421 and the first driven shaft 422, the first driving part 423 is configured to drive the first carrier 44 to move along the direction set by the optical axis. The second piezoelectric actuator 430 includes a second piezoelectric driving part 431, a second driven shaft 432 driveably coupled to the second piezoelectric driving part 431, and a second driving part 433 tightly fitted to the second driven shaft 432, wherein under the action of the second piezoelectric driving part 431 and the second driven shaft 432, the second driving part 433 is configured to drive the second carrier 45 to move along the direction set by the optical axis.

As shown in fig. 5A and 5B, the piezoelectric active part 110 includes an electrode plate 111 and at least one piezoelectric substrate stacked on the electrode plate 111. The piezoelectric substrate is a substrate having an inverse piezoelectric effect and contracting or expanding according to a polarization direction and an electric field direction, and for example, it may be made and used by using substrate polarization in a thickness direction in a single crystal or polycrystalline ceramic, a polymer, or the like. Here, the inverse piezoelectric effect means that an electric field is applied in a polarization direction of a dielectric, and the dielectric is mechanically deformed when a potential difference is generated.

More specifically, in the example illustrated in fig. 5A and 5B, the at least one piezoelectric substrate includes a first piezoelectric substrate 112 and a second piezoelectric substrate 113, and the electrode plate 111 is sandwiched between the first piezoelectric substrate 112 and the second piezoelectric substrate 113. Also, in this example, the piezoelectric active part 110 further includes electrode layers 115 formed on the upper and lower surfaces of the first piezoelectric substrate 112, respectively, and electrode layers 115 formed on the upper and lower surfaces of the second piezoelectric substrate 113, respectively, to supply a pulse voltage to the first and second

piezoelectric substrates

112 and 113 through the electrode layers 115 and the electrode plates 111.

In this example, the electrode plate 111 may be formed of a plate-shaped member with certain elasticity, for example, a metal plate with certain elasticity. As shown in fig. 5A and 5B, the piezoelectric active part 110 further includes at least one electrically conductive site 114 electrically connected to the electrode plate 111, for example, the at least one electrically conductive site 114 may be welded to the electrode plate 111 by welding, or the at least one electrically conductive site 114 may be integrally formed with the electrode plate 111. It is worth mentioning that when the number of the electric conduction sites 114 is plural, it is preferable that the plural electric conduction sites 114 are symmetrically distributed on the outer surface of the electrode plate 111.

In this example, the first piezoelectric substrate 112 and the second piezoelectric substrate 113 are attached to a first side surface and a second side surface opposite to the first side surface of the electrode plate 111 through the electrode layer 115, respectively. For example, in this example, the first piezoelectric substrate 112 and the second piezoelectric substrate 113 may be fixed to the electrode plate 111 in a surface-to-surface engagement with each other, or the first piezoelectric substrate 112 and the second piezoelectric substrate 113 may be attached to the electrode plate 111 by conductive silver paste.

Preferably, in this example, the shapes of the first piezoelectric substrate 112 and the second piezoelectric substrate 113 are similar or identical in size to the electrode plate 111, so that the piezoelectric active part 110 has better vibration efficiency. In this specific example, the first piezoelectric substrate 112, the second piezoelectric substrate 113, and the electrode plate 111 are circular plates.

As shown in fig. 5A and 5B, the follower shaft 120 is fixed to the piezoelectric driving part 110, for example, attached to the center of the piezoelectric driving part 110 by an adhesive. Specifically, the driven shaft 120 may be attached to the electrode layer 115 on the outer surface of the first piezoelectric substrate 112 by an adhesive, or nestingly attached to the center hole of the electrode layer 115 on the outer surface of the first piezoelectric substrate 112 by an adhesive, or the first piezoelectric substrate 112 has a center hole, and the driven shaft 120 is further fitted into the center hole of the first piezoelectric substrate 112, or the piezoelectric active part 110 has a center hole penetrating through the upper and lower surfaces thereof, and the driven shaft 120 is fitted into the center hole of the piezoelectric active part 110 by an adhesive. In a specific implementation, the driven shaft 120 may be implemented as a carbon rod. In this example, the cross-sectional shape of the driven shaft 120 is circular or polygonal, preferably circular

As shown in fig. 5A and 5B, the driving part 130 is tightly fitted on the driven shaft 120. In this example, the driving portion 130 is friction-fitted with the driven shaft 120 such that the driving portion 130 is tightly fitted on the driven shaft 120. More specifically, in this example, the driving part 130 may be implemented as a clamping mechanism that clamps the driven shaft 120, wherein the clamping mechanism may be a clamping mechanism with an adjustable clamping force, or a clamping mechanism partially or entirely made of an elastic material.

As shown in fig. 5A and 5B, the electrode layer 115 exposed on the surface of the piezoelectric active part 110 is electrically connected to the positive electrode 117 of the power control part 116, and the electrode plate 111 is electrically connected to the negative electrode 118 of the power control part 116 through the electrical conduction part 114, so that when the power control part 116 repeatedly applies a pulse voltage to the electrode layer 115 and the electrode plate 111, the first piezoelectric substrate 112 and the second piezoelectric substrate 113 are deformed in one direction by the inverse piezoelectric effect and rapidly return to a flat plate shape by the elasticity of the electrode plate 111. In the above deformation process, the driven shaft 120 reciprocates in the set axial direction, and since the driving part 130 and the driven shaft 120 are in frictional engagement, when the piezoelectric driving part 110 is deformed in one direction, the driving part 130 and the driven shaft 120 move together, and when the piezoelectric driving part 110 is rapidly restored to its original shape, the driven shaft 120 also moves in the reverse direction and the driving part 130 cannot return to its original position due to the inertia effect and cannot follow the movement of the driven shaft 120, and only stays at the position. Accordingly, the position of the driving part 130 is changed during one deformation process, and accordingly, the movement can be repeated by repeatedly applying the pulse voltage, so that the driving part 130 is moved to a target position.

Fig. 6A and 6B are schematic diagrams illustrating a modified embodiment of the first drive element 42 and the second drive element 43 of the variable focus imaging module according to the embodiment of the present application. As shown in fig. 6A and 6B, in this modified implementation, the piezoelectric actuator 100 includes: the zoom lens comprises a piezoelectric driving part 110, a driven shaft 120 which is drivingly connected to the piezoelectric driving part 110 of the piezoelectric driving part 110, and a driving part 130 which is movably arranged on the driven shaft 120, wherein the driving part 130 is configured to drive the first carrier 44 or the second carrier 45 under the action of the piezoelectric driving part 110 and the driven shaft 120 so as to drive the zoom part 22 or the focusing part 23 to move along the optical axis.

As shown in fig. 6A and 6B, in this example, the piezoelectric active part 110 includes a piezoelectric element 111A, and the piezoelectric element 111A has a laminated structure as illustrated in fig. 6A. Specifically, as shown in fig. 6A, the piezoelectric element 111A includes a plurality of piezoelectric telescopic bodies 112A and a plurality of electrodes 113A, and the plurality of piezoelectric telescopic bodies 112A and the plurality of electrodes 113A are alternately stacked. In particular, with the laminated structure as described above, the piezoelectric element 111A can obtain a relatively large amount of deformation even in the case where a small electric field is applied.

In this example, for convenience of explanation, the electrodes 113A alternately sandwiching the plurality of piezoelectric telescopic bodies 112A are defined as inner electrodes, the electrodes 113A disposed on the surface of the piezoelectric telescopic body 112A and positioned on the upper and lower surfaces of the piezoelectric element 111A are defined as upper and lower electrodes, respectively, and the electrodes 113A disposed on the surface of the piezoelectric telescopic body 112A and positioned on the side surface of the piezoelectric element 111A are defined as side electrodes. Accordingly, in the case of the multilayer, the electrodes 113A of the same polarity are electrically connected through the side electrodes.

As shown in fig. 6B, in this example, the driven shaft 120 has a cylindrical shape and is attached to a middle region of the upper surface of the piezoelectric element 111A by an adhesive so that the moving shaft is coupled to the piezoelectric element 111A. Of course, in other examples of the present application, the shape of the moving axis may also be adjusted, and the present application is not limited thereto.

The driven shaft 120 is made of a material containing, as a main component, any one of "carbon, a heavy metal, a carbide of a heavy metal, a boride of a heavy metal, and a nitride of a heavy metal", and the piezoelectric element 111A has a rectangular parallelepiped shape having sides along X, Y, and Z axes orthogonal to each other. In this example, the length of the piezoelectric element 111A in the X-axis direction is 1mm, the length of the piezoelectric element 111A in the Y-axis direction is 1mm, and the length (height) of the piezoelectric element 111A in the Z-axis direction is 2 mm.

It should be noted that the piezoelectric actuator 100 illustrated in fig. 6A and 6B has advantages of small volume, large thrust and high precision compared to a conventional electromagnetic actuator. Moreover, compared to the piezoelectric actuator 100 illustrated in fig. 5A and 5B, the piezoelectric active part 110 of the piezoelectric actuator 100 illustrated in fig. 6A and 6B has a relatively smaller cross-sectional size, and is suitable for being used in a module with a compact space, but has a relatively larger thickness, and the internal structure of the piezoelectric element 111A is relatively complex.

Accordingly, the piezoelectric actuator 100 according to the embodiment of the present application can provide a relatively high driving force. More specifically, the piezoelectric actuator 100 selected for the present application is capable of providing a driving force of 0.6N to 2N, which is sufficient to drive components having a weight greater than 100 mg.

Also, in addition to being able to provide a relatively large driving force, the piezoelectric actuator 100 has other advantages over conventional electromagnetic motor solutions and memory alloy motor solutions, including but not limited to: the size is relatively small (with slender shape), the response precision is better, the structure is relatively simpler, the driving control is relatively simpler, the product consistency is high, no electromagnetic interference exists, the stroke is relatively large, the stabilization time is short, the weight is relatively small, and the like.

Specifically, the variable focus camera module requires that the driver configured for the variable focus camera module has features such as a long driving stroke and a need to ensure good alignment accuracy. In current voice coil motor scheme, need additionally to design guide arm or ball guide in order to guarantee the motion linearity, need simultaneously at the large-size drive magnet of camera lens lateral part adaptation/coil etc. need set up auxiliary positioning device such as ball, shell fragment, suspension wire simultaneously, for holding more parts, guarantee structural strength and reservation structure clearance, often lead to the module horizontal size to be big partially, and structural design is complicated, and module weight is heavier. The memory alloy motor scheme is limited by relatively few strokes that the memory alloy scheme can provide in the same proportion, and meanwhile, the reliability risks of potential wire breakage and the like exist.

The piezoelectric actuator 100 has a relatively simple structure, the assembly structure is simpler, and the sizes of the active elements such as the piezoelectric active part 110, the driven shaft 120 and the driving part 130 are basically independent of the size of the movement stroke, so that the piezoelectric actuator 100 can realize the advantages of large thrust, small size, small weight and the like in optical zoom products, and simultaneously, the design is performed by matching with larger stroke or heavier weight of the devices, and the integration level in the design is higher.

Further, the piezoelectric actuator 100 utilizes friction force and inertia during vibration to push an object to be pushed (for example, the focusing portion 23 or the zooming portion 22) to perform micron-scale motion in a friction contact manner, which has the advantages of greater thrust, greater displacement and lower power consumption compared to a friction force manner in which an electromagnetic scheme drives the object to be pushed in a non-contact manner and electromagnetic force is required to counteract gravity, and meanwhile, the control precision is higher, and high-precision continuous zooming can be realized. In addition, when a plurality of motor mechanisms are provided, the piezoelectric actuator 100 has no magnet coil structure, and thus has no magnetic interference problem. In addition, the piezoelectric actuator 100 can be self-locked by means of friction force between components, so that shaking noise of the variable-focus camera module during optical zooming can be reduced.

After the piezoelectric actuator 100 is selected as the first driving element 42 and the second driving element 43, that is, the first driving element 42 is implemented as a first piezoelectric actuator 420 and the second driving element 43 is implemented as a second piezoelectric actuator 430, wherein the first driving element 42 and the second driving element 43 can be electrically connected to an external power supply in the following manner. For example, it may be electrically connected to the electrode layers 115 of the first and

second driving elements

42 and 43 and the electrically conductive portions 114 of the electrode plate 111 through a connection circuit, which may be implemented as a flexible board connection tape or a plurality of leads, to be electrically connected to the outside through the connection circuit. Further, when the piezoelectric actuator 100 is disposed in the driving housing 41, the piezoelectric actuator 100 is adapted to be directly led out through the flexible board, so as to be electrically connected to the circuit board 31 of the photosensitive assembly 30.

In other examples of the present application, the first driving element 42 and the second driving element 43 may also be directly led out through a flexible board, and electrically connected to the circuit board 31 of the photosensitive assembly 30. Or, at least two LDS grooves are disposed on the surface of the driving housing 41, the depth of the LDS groove is not greater than 20-30 μm, the width of the LDS groove is not less than 60 μm, and an LDS (laser direct structuring) technique is applied in the LDS groove, and a conductive coating (for example, a nickel-palladium-gold coating) is plated on the surface of the LDS groove, so as to avoid interference of other metals inside the LDS groove, and the connection circuit of the first driving element 42 and the second driving element 43 is connected with the conductive coating in the LDS groove, so as to lead out the circuit, and is electrically connected with the circuit board 31 of the photosensitive component 30. Alternatively, at least two wires may be molded in the driving housing 41 by Insert Molding (Insert Molding) technology, so that the connection circuit of the first driving element 42 and the second driving element 43 is electrically connected to the wires to lead out the circuit, and is electrically connected to the circuit board 31 of the photosensitive assembly 30.

Accordingly, in the embodiment of the present application, the first driving element 42 and the second driving element 43 are implemented as the first piezoelectric actuator 420 and the second piezoelectric actuator 430, wherein the first driving part 423 of the first driving element 42 is configured to drive the first carrier 44 under the action of the first piezoelectric driving part 421 and the first driven shaft 422 to move the zooming part 22 along the optical axis direction; the second driving part 433 of the second driving element 43 is configured to drive the second carrier 45 under the action of the second piezoelectric driving part 431 and the second driven shaft 432 to drive the focusing part 23 to move along the optical axis direction.

After the first driving element 42 and the second driving element 43 are configured as the first piezoelectric actuator 420 and the second piezoelectric actuator 430, the first driving element 42 and the second driving element 43 need to be further arranged in a reasonable manner in the variable focus camera module.

As shown in fig. 1 and 3, in the embodiment of the present application, the first carrier 44 and the second carrier 45 have a special structural configuration, such that when the first carrier 44 and the second carrier 45 are installed in the driving housing 41, at least one first receiving channel is disposed between the bottom surface of the driving housing 41 and the bottom surface of the first carrier 44, and at least one second receiving channel is disposed between the bottom surface of the driving housing 41 and the bottom surface of the second carrier 45. In the conventional camera module structure arrangement, the spaces between the first and

second carriers

44 and 45 and the driving housing 41 are usually left unused because: the space between the first and

second carriers

44, 45 and the drive housing 41 is too small to fit other components.

However, when the first driving element 42 and the second driving element 43 are implemented as the piezoelectric actuator 100, as is apparent from the description of the piezoelectric actuator 100 described above, the piezoelectric actuator 100 has an elongated shape (i.e., the driven shaft 120 extends perpendicularly outward from the piezoelectric driving part 110 to have an elongated shape), and particularly, the driven shaft 120 of the piezoelectric actuator 100 has an elongated bar-like structure. Accordingly, since the piezoelectric actuator 100 has a special structure and size configuration, it is preferable that, in the embodiment of the present application, at least a portion of the piezoelectric actuator 100 is disposed in at least one of the first receiving channel and the second receiving channel.

More specifically, when the first driving element 42 is implemented as a first piezoelectric actuator 420 and the second driving element 43 is implemented as a second piezoelectric actuator 430, at least a portion of the first piezoelectric actuator 420 is disposed in the first receiving channel 440, and at least a portion of the second piezoelectric actuator 430 is disposed in the second receiving channel 450. For example, in the example illustrated in fig. 1 and 3, at least a portion of the first driven shaft 422 of the first piezoelectric actuator 420 extends within the first receiving channel 440, and at least a portion of the second driven shaft 432 of the second piezoelectric actuator 430 extends within the second receiving channel 450, that is, the first driven shaft 422 of the first piezoelectric actuator 420 is disposed within the first receiving channel 440, and the second driven shaft 432 of the second piezoelectric actuator 430 is disposed within the second receiving channel 450.

As shown in fig. 1 and 3, in the embodiment of the present application, the first carrier 44 includes a first carrier base 441 and a first elongated arm 442 and a second elongated arm 443 integrally extending upward from the first carrier base 441, respectively, so as to form a first mounting cavity 444 for mounting the zooming portion 22 and a first opening 445 communicating with the first mounting cavity 444 between the first carrier base 441, the first elongated arm 442 and the second elongated arm 443, wherein the zooming portion 22 is adapted to have the first opening 445 mounted in the first mounting cavity 444.

As shown in fig. 1 and 3, in this example, two first receiving channels 440 are formed between the first carrier 44 and the driving case 41, wherein one of the first receiving channels 440 is formed between a side surface of the first carrier base 441 and a bottom surface of the first extension arm 442 and a bottom surface of the driving case 41, and the other of the first receiving channels 440 is formed between a side surface of the first carrier base 441 and a bottom surface of the second extension arm 443 and a bottom surface of the driving case 41.

It should be understood that, in the embodiment of the present application, the first driven shaft 422 of the first piezoelectric actuator 420 may be disposed in any one of the first receiving channels 440. It should be noted that, in the embodiment of the present application, the structure of the first carrier 44 or the shape of the bottom surface of the driving shell 41 may be appropriately adjusted, so that only one first receiving channel 440 is formed between the driving shell 41 and the first carrier 44, which is not limited in the present application.

As shown in fig. 1 and 3, in the embodiment of the present application, the second carrier 45 includes a second carrier base 451, and a third elongated arm 452 and a fourth elongated arm 453 integrally extending upward from the second carrier base 451, respectively, so as to form a second mounting cavity 454 for mounting the focusing portion 23 and a second opening 455 communicating with the second mounting cavity 454 among the second carrier base 451, the third elongated arm 452, and the fourth elongated arm 453, wherein the focusing portion 23 is adapted to be mounted into the second mounting cavity 454 from the second opening 455.

As shown in fig. 1 and 3, in this example, two second receiving channels 450 are formed between the second carrier 45 and the driving housing 41, wherein one of the second receiving channels 450 is formed between a side surface of the second carrier base 451 and a bottom surface of the third extension arm 452 and a bottom surface of the driving housing 41, and the other of the second receiving channels 450 is formed between a side surface of the second carrier base 451 and a bottom surface of the fourth extension arm 453 and a bottom surface of the driving housing 41.

It should be understood that, in the embodiment of the present application, the second driven shaft 432 of the second piezoelectric actuator 430 may be disposed in any one of the second receiving channels 450. It should be noted that, in the embodiment of the present application, the configuration of the second carrier 45 or the bottom surface of the driving housing 41 may be appropriately adjusted, so that only one second receiving channel 450 is formed between the driving housing 41 and the second carrier 45, which is not limited in the present application.

In particular, it should be noted that, in the present embodiment, the first receiving passage 440 and the second receiving passage 450 are lower than the optical axis, that is, when the first driven shaft 422 of the first piezoelectric actuator 420 is mounted in the first receiving passage 440, the height of the first driven shaft 422 with respect to the bottom surface of the driving housing 41 is lower than the height of the optical axis with respect to the bottom surface of the driving housing 41. Accordingly, when the second driven shaft 432 of the second piezoelectric actuator 430 is mounted in the second receiving passage 450, the height of the second driven shaft 432 with respect to the bottom surface of the driving housing 41 is also lower than the height of the optical axis with respect to the bottom surface of the driving housing 41.

In the present embodiment, the driving portion 130 of the piezoelectric actuator 100 is also mounted in the first receiving passage 440 and the second receiving passage 450. For example, the driving portion 130 of the piezoelectric actuator 100 may be disposed in the first receiving channel 440 or the second receiving channel 450 by being adhered to or integrally molded with a lower surface of the first carrier 44 or the second carrier 45.

In particular, in the example illustrated in fig. 1 and 3, the first driving portion 413 and the second driving portion 433 are implemented by two clamping plates which are at least partially elastic and are oppositely arranged, wherein the first driven shaft 421 of the first piezoelectric actuator 420 and the second driven shaft 432 of the second piezoelectric actuator 430 are respectively tightly clamped in a clamping cavity formed by the two clamping plates. Accordingly, after the first piezoelectric actuator 420 and the second piezoelectric actuator 430 are activated, the first piezoelectric actuator 420 and the second piezoelectric actuator 430 can apply a driving force on the bottom of the first carrier 44 and the second carrier 45, and by the configuration of the driving positions, the driving difficulty is reduced, and the driving smoothness is improved.

It is worth mentioning that, in the embodiment of the present application, the first receiving channel 440 is preferably aligned with the second receiving channel 450. For example, in one example of the present application, the structures of the first and

second carriers

44 and 45 may be appropriately adjusted such that the first and second receiving

passages

440 and 450 are aligned in the longitudinal direction set by the drive housing 41. In some particular examples, the first receiving channel 440 and the second receiving channel 450 may even have the same cross-sectional shape and cross-sectional size, thereby promoting symmetry of the first carrier 44 and the second carrier 45.

Further, as shown in fig. 1, in the embodiment of the present application, the first driving element 42 and the second driving element 43 are selectively disposed on the first side of the optical axis, that is, the first piezoelectric actuator 420 and the second piezoelectric actuator 430 are selectively disposed on the same side of the optical axis, so that the first driving element 42 and the second driving element 43 are more compactly arranged in the driving housing 41, and occupy less space in the longitudinal direction of the driving housing 41. Here, the longitudinal space of the driving housing 41 refers to a space occupied by the driving housing 41 in a length direction thereof, and accordingly, the lateral space of the driving housing 41 refers to a space occupied by the driving housing 41 in a width direction thereof, and the height space of the driving housing 41 refers to a space occupied by the driving housing 41 in a height direction thereof.

Also, when the first drive element 42 and the second drive element 43 are disposed on the same side of the optical axis, when the zooming portion 22 is driven by the first drive element 42 and the focusing portion 23 is driven by the second drive element 43, the relative positional relationship (particularly, the relative tilt relationship) between the zooming portion 22 and the focusing portion 23 can be reduced to improve the consistency between the focusing portion 23 and the zooming portion 22 and reduce the possibility of the imaging quality degradation of the variable focus camera module due to the tilt of the zooming portion 22 and the focusing portion 23.

Further, as shown in fig. 1 and 3, in this example, the first driving element 42 and the second driving element 43 are located on the same side of the optical axis, and the first driving element 42 and the second driving element 43 located on the same side are disposed in a different direction, or the first driving element 42 and the second driving element 43 located on the same side are disposed opposite to each other, in such a way as to increase the compactness of the arrangement of the first driving element 42 and the second driving element 43 in the space formed by the driving housing 41. In the present embodiment, the first driving element 42 and the second driving element 43 are implemented as a piezoelectric actuator 100, which includes a piezoelectric driving part 110 and a driven shaft 120 extending from the piezoelectric driving part 110. If the piezoelectric driving part 110 is set as the head of the piezoelectric actuator 100, the driven shaft 120 is set as the tail of the piezoelectric actuator 100, the head of the piezoelectric actuator 100 is set to be forward and the tail thereof is set to be backward in a first direction, and the head of the piezoelectric actuator 100 is set to be backward and the tail thereof is set to be forward in a second direction, in this example, the first driving element 42 is arranged in the first direction and the second driving element 43 is arranged in the second direction. That is, in this example, the head of the first drive element 42 is adjacent to the tail of the second drive element 43, i.e., the first follower shaft 422 of the first piezoelectric actuator 420 is adjacent to the second follower shaft 432 of the second piezoelectric actuator 430.

Preferably, in the present embodiment, the first driving element 42 and the second driving element 43 have the same installation height with respect to the bottom surface of the driving housing 41, that is, the first piezoelectric actuator 420 and the second piezoelectric actuator 430 have the same installation height with respect to the bottom surface of the driving housing 41, that is, the first driving element 42 and the second driving element 43 may be disposed on the same line on the height space of the driving housing 41. In this way, the consistency of the focusing portion 23 and the zooming portion 22 in the height direction set by the driving housing 41 after being driven by the first driving element 42 and the driving element is relatively higher, that is, the consistency of the zooming portion 22 and the focusing portion 23 in the height direction set by the driving housing 41 after the zooming portion 22 is driven by the first driving element 42 and the focusing portion 23 is driven by the second driving element 43 is relatively higher, so as to ensure the imaging quality of the variable focus camera module.

More preferably, in the embodiment of the present application, the first driving element 42 and the second driving element 43 are arranged in relative alignment in the width direction set by the driving housing 41. That is, more preferably, in the embodiment of the present application, the first driven shaft 422 of the first piezoelectric actuator 420 and the second driven shaft 432 of the second piezoelectric actuator 430 are aligned with each other. That is, the first drive element 42 and the second drive element 43 are also provided in alignment in the width direction on the first side of the optical axis to further increase the uniformity and compactness in the spatial arrangement of the first drive element 42 and the second drive element 43, and to increase the uniformity of the focusing section 23 and the zooming section 22 after being driven.

In a specific implementation, the first driving element 42 may be suspended and fixed in the driving housing 41 and the first driven shaft 422 of the first driving element 42 extends into the first receiving channel 440 by fixing the first piezoelectric driving portion 421 of the first driving element 42 to the first side wall of the driving housing 41, for example, the first piezoelectric driving portion 421 of the first driving element 42 is attached to the first side wall of the driving housing 41 by an adhesive, wherein the adhesive preferably has a certain elasticity. Meanwhile, the second driving element 43 is suspended and fixed in the driving housing 41 and the second driven shaft 432 of the second driving element 43 extends into the second receiving channel 450 by fixing the second piezoelectric driving part 431 of the second driving element 43 to a second side wall of the driving housing 41 opposite to the first side wall, for example, the second piezoelectric driving part 431 of the second driving element 43 is attached to the second side wall of the driving housing 41 by an adhesive, wherein the adhesive preferably has certain elasticity.

It is worth mentioning that in other examples of the present application, the first drive element 42 and the second drive element 43 may be arranged in other ways opposite to each other. For example, in other examples of the present application, the first driving elements 42 are arranged in the second direction, and the second driving elements 43 are arranged in the first direction, that is, the first driving elements 42 are arranged in the direction with the head portion in front and the tail portion in back, and the second driving elements 43 are arranged in the direction with the head portion in back and the tail portion in front. That is, in these examples, the first piezoelectric active portion 421 of the first piezoelectric actuator 420 is adjacent to the second piezoelectric active portion 431 of the second piezoelectric actuator 430.

It is also worth mentioning that in other examples of the present application, the first driving element 42 and the second driving element 43 may be arranged in the same direction, provided that the first driving element 42 and the second driving element 43 are arranged on the same side of the optical axis. For example, the first driving element 42 and the second driving element 43 are arranged in a first direction at the same time, or the first driving element 42 and the second driving element 43 are arranged in a second direction at the same time.

Further, on the premise that the first driving element 42 and the second driving element 43 are disposed on the same side of the optical axis, in order to further improve the consistency of the focusing part 23 and the zooming part 22 after being driven, as shown in fig. 1 and 3, in the embodiment of the present application, the driving assembly 40 further includes: a guide structure 46 disposed on a second side of the optical axis opposite to the first side, the guide structure 46 being configured to guide the focusing part 23 and the zooming part 22 to move along a direction set by the optical axis.

It should be noted that in the present embodiment, the first driving element 42 and the second driving element 43, and the guiding structures are respectively located on both sides of the optical axis, and by such a position arrangement, the internal space of the variable focus camera module is sufficiently utilized to facilitate the weight and thickness reduction of the variable focus camera module.

As shown in fig. 1, in the embodiment of the present application, the first driving element 42 and the second driving element 43 share one guiding structure 46, that is, the first carrier 44 and the second carrier 45 share one guiding structure 46, in this way, the relative positional relationship between the first carrier 44 and the second carrier 45 is favorably and stably maintained, so as to favorably and stably maintain the relative positional relationship between the focusing portion 23 and the zooming portion 22 of the zoom lens group 20, so as to improve the resolving power of the zoom lens group 20.

More specifically, as shown in fig. 1, in this example, the guide structure 46 includes: a first supporting portion 461 and a second supporting portion 462 formed at an interval in the driving housing 41, and at least one guide arm 463 erected between the first supporting portion 461 and the second supporting portion 462 and penetrating the first carrier 44 and the second carrier 45, the guide arm 463 being parallel to the optical axis so that the first carrier 44 and the second carrier 45 can be guided to move along a direction set by the guide arm 463 parallel to the optical axis.

As shown in fig. 1, in this example, the first and

second support portions

461 and 462 function to span the guide 463. For example, in a specific embodiment of this example, the first support 461 and the second support 462 may be mounted on the bottom surface of the driving housing 41 (for example, the first support 461 and the second support 462 may be implemented as support brackets), and of course, the first support 461 and the second support 462 may be integrally formed on the bottom surface of the driving housing 41, which is not limited in this application. Of course, in other specific embodiments of this example, the first support 461 and the second support 462 may also be implemented as at least a portion of a side wall of the drive housing 41, that is, two opposite side walls of the drive housing 41 form the first support 461 and the second support 462. Here, the side walls of the driving housing 41 may be two opposite side walls of the driving housing 41 along a direction in which an optical axis is set, and/or two opposite side walls of the driving housing 41 perpendicular to the direction in which the optical axis is set.

Accordingly, in order to allow the guide 463 to pass through, guide grooves 464 may be provided on the first and

second support portions

461 and 462, and guide channels 465 penetrating both side surfaces thereof are formed in the first and

second carriers

44 and 45, so that the guide 463 can be erected on the first and

second support portions

461 and 462 while passing through the guide channels 465 of the first and

second carriers

44 and 45 in such a manner as to be fitted to the guide grooves 464. Further, in this particular example, balls and/or lubrication may be optionally disposed within the guide rod channels 465 of the first and

second carriers

44, 45 to reduce friction.

It should be noted that, in the embodiment of the present application, the guide rod 463 is preferably flush with the driven shaft 120 of the first driving element 42 and/or the driven shaft 120 of the second driving element 43, so as to reduce the risk of tilting between the focusing portion and the zooming portion, so as to ensure the imaging quality of the variable focus camera module.

Fig. 7A illustrates a schematic diagram of a variant implementation of the variable focus camera module according to an embodiment of the present application. As shown in fig. 7A, in this modified embodiment, the configuration of the structure of the guide structure 46 is changed. Specifically, in this modified embodiment, the driving assembly 40 further includes a first guiding mechanism 47 and a second guiding mechanism 48, wherein the first guiding mechanism 47 is configured to guide the zoom portion 22 to move along the direction set by the optical axis, and the second guiding mechanism 48 is configured to guide the focusing portion 23 to move along the direction set by the optical axis.

More specifically, the first guiding mechanism 47 includes a first mounting portion 471 and a second mounting portion 472, and at least one first guide rod 473 that is mounted between the first mounting portion 471 and the second mounting portion 472 and passes through the first carrier 44, and the first guide rod 473 is parallel to the optical axis, so that the first carrier 44 can be guided to move along a direction set by the first guide rod 473 that is parallel to the optical axis. The second guide mechanism 48 includes a third mounting portion 481 and a fourth mounting portion 482, and at least one second guide rod 483 bridging between the third mounting portion 481 and the fourth mounting portion 482 and penetrating the second carrier 45, the second guide rod 483 being parallel to the optical axis so that the second carrier 45 can be guided to move in a direction set by the first guide rod 473 parallel to the optical axis.

That is, in this modified embodiment, one guide mechanism is provided for each of the first carrier 44 and the second carrier 45, and the guide mechanisms are implemented on the principle of guiding by the guide rods 463.

Preferably, in this modified embodiment, the first guide rods 473 and the second guide rods 483 are flush with each other, so that when the movement of the first carrier 44 and the second carrier 45 is guided by the first guide mechanism 47 and the second guide mechanism 48, respectively, the uniformity of the first carrier 44 and the second carrier 45 after being moved can be more effectively ensured. More preferably, in this modified embodiment, the height of the first guide rod 473 and the second guide rod 483 with respect to the bottom surface of the drive housing 41 is flush with the mounting height of the first driven shaft 422 and the second driven shaft 432 with respect to the bottom surface of the drive housing 41, as shown in fig. 7B, which is more advantageous in ensuring the consistency of the first carrier 44 and the second carrier 45 with respect to each other after being moved.

Fig. 8A illustrates a schematic diagram of a variant implementation of the variable focus camera module according to an embodiment of the present application. Fig. 8B illustrates another schematic diagram of the variable focus camera module illustrated in fig. 8A. As shown in fig. 8A and 8B, in this modified embodiment, the configuration of the guide structure 46 is changed again.

Specifically, as shown in fig. 8A and 8B, in this modified embodiment, the driving assembly 40 further includes a first guide mechanism 47 disposed between the first carrier 44 and the driving housing 41, and a second guide mechanism 48 disposed between the second carrier 45 and the driving housing 41, wherein the first guide mechanism 47 is configured to guide the zoom portion 22 to move along the optical axis, and the second guide mechanism 48 is configured to guide the focusing portion 23 to move along the optical axis.

As shown in fig. 8A and 8B, the first guiding mechanism 47 includes at least one ball 401 disposed between the first carrier 44 and the driving housing 41, and a receiving groove 402 disposed between the first carrier 44 and the driving housing 41 for receiving the at least one ball 401. That is, the first guide structure 46 is a ball 401 guide structure 46.

In this example embodiment, the housing groove 402 may be formed on a surface of the first carrier 44 facing the driving housing 41, and the at least one ball 401 may slide or roll in the housing groove 402, and a longitudinal direction of the housing groove 402 may be aligned with the optical axis direction. The opposite surfaces of the first carrier 44 and the driving housing 41 may further be provided with a magnetic attraction structure that is attracted to each other by magnetic force, for example, a magnetic element is provided on the first carrier 44, and a magnetic attraction element adapted to be attracted by the magnetic element is formed on the bottom surface of the driving housing 41, so that the first carrier 44 can be attracted by the driving housing 41, and the ball 401 is fixed between the first carrier 44 and the driving housing 41.

Accordingly, in the example shown in fig. 8B, the second guiding mechanism 48 includes at least one ball 401 disposed between the second carrier 45 and the driving housing 41, and a receiving groove 402 disposed between the second carrier 45 and the driving housing 41 for receiving the at least one ball 401. That is, in this example, the second guide structure 46 is also a ball 401 guide structure 46.

That is, in this particular example, the second guide mechanism 48 of the second carrier 45 is similar to the first guide mechanism 47 of the first carrier 44. Specifically, the housing groove 402 is formed on the surface of the second carrier 45 facing the driving housing 41, so that the at least one ball 401 slides or rolls in the housing groove 402. Similarly, the opposite surfaces of the second carrier 45 and the driving housing 41 may be further provided with a magnetic attraction structure that is attracted to each other by magnetic force, for example, a magnetic element is disposed on the bottom surface of the second carrier 45, and a magnetic attraction element adapted to be attracted by the magnetic element is formed on the bottom surface of the driving housing 41, so that the second carrier 45 can be attracted by the driving housing 41, and the at least one ball 401 is rollably disposed between the second carrier 45 and the driving housing 41.

Preferably, the first guide mechanism 47 and the second guide structure 46 are configured identically, and the receiving groove 402 of the first guide structure 46 and the receiving groove 402 of the second guide structure 46 are in the same line and connected to each other, so that the inclination between the first carrier 44 and the second carrier 45 can be reduced.

Fig. 9 illustrates a schematic diagram of another variant implementation of the guide structure 46 of the variable focus camera module according to an embodiment of the present application. As shown in fig. 9, in this example, the first guide mechanism 47 includes: at least one slider 403 disposed between the first carrier 44 and the driving housing 41, and a sliding rail 404 disposed between the driving housing 41 and the first carrier 44 and adapted to slide the at least one slider 403. That is, in this example, the first guide structure 46 is a slider 403 and slide rail 404 structure.

In a specific embodiment of this example, the slider 403 is fixed to the lower surface of the first carrier 44, and the slide rails 404 are formed at corresponding positions on the bottom surface of the driving housing 41. Of course, in other embodiments of this example, the slide rails 404 and the slide blocks 403 may be disposed in other manners, for example, the slide rails 404 may be further disposed on the lower surface of the first carrier 44. Further, in this example, a magnetic attraction structure may be provided between the first carrier 44 and the drive housing 41, so that the first carrier 44 can be attracted to the drive housing 41.

As shown in fig. 9, in this example, the second guide mechanism 48 includes: at least one slider 403 disposed between the second carrier 45 and the driving housing 41, and a slide rail 404 disposed between the driving housing 41 and the second carrier 45 and adapted to slide the at least one slider 403. That is, in this example, the second guide structure 46 is a slider 403 and slide rail 404 structure.

In a specific embodiment of this example, the slider 403 is fixed to the lower surface of the second carrier 45, and the slide rails 404 are formed at corresponding positions on the bottom surface of the driving housing 41. Of course, in other embodiments of this example, the slide rails 404 and the slide blocks 403 may also be disposed in other manners, for example, the slide rails 404 may be further disposed on the lower surface of the second carrier 45. Further, in this example, a magnetic attraction structure may be further provided between the second carrier 45 and the driving housing 41, so that the second carrier 45 can be attracted to the driving housing 41.

Preferably, the arrangement of the slide 403 and the slide rail 404 between the first carrier 44 and the drive housing 41 is the same as the arrangement of the slide 403 and the slide rail 404 between the second carrier 45 and the drive housing 41, in particular the size of the slide 403 and the size of the slide rail 404. Further, two slide rails 404 provided on the driving housing 41 corresponding to the first carrier 44 and the second carrier 45 are in the same line and may be connected to each other, so that the inclination of the first carrier 44 and the second carrier 45 may be further reduced.

It is worth mentioning that in other examples of the present application, the first driving element 42 and the second driving element 43 can also be arranged in other ways, for example, the first piezoelectric actuator 420 and the second piezoelectric actuator 430 are respectively disposed on a first side of the optical axis and a second side opposite to the first side, as shown in fig. 10. That is, in these examples, the first drive element 42 and the second drive element 43 are provided on the left and right sides of the optical axis, respectively.

Accordingly, in these examples, the first piezoelectric actuator 420 and the second piezoelectric actuator 430 are disposed either anisotropically or isotropically. That is, in these examples, the arrangement orientation of the first drive element 42 and the second drive element 43 is not limited. Likewise, the first drive element 42 and the second drive element 43 may be provided with corresponding guide structures 46 (or guide mechanisms), as shown in fig. 10. Here, since the guide structure or the guide mechanism has been sufficiently discussed in the foregoing section, it will not be described in detail.

In summary, the variable focus camera module according to the embodiments of the present application is illustrated, wherein the variable focus camera module employs the piezoelectric actuator 100 as a driver to provide not only a sufficiently large driving force, but also a driving performance with higher precision and longer stroke to meet the zooming requirement of the variable focus camera module.

Further, in the embodiment of the present application, the piezoelectric actuator 100 has a relatively small size to better adapt to the trend of making the camera module lighter and thinner. Moreover, the variable-focus camera module adopts a reasonable layout scheme to arrange the piezoelectric actuator 100 in the variable-focus camera module so as to meet the requirements of the structure and the size of the variable-focus camera module.

Further, in the embodiment of the present application, at least a portion of the piezoelectric actuator 100 is disposed in an originally unused space in the variable focus camera module, so that the space in the variable focus camera module can be more fully used, and the compactness of the space layout of the variable focus camera module is improved.

It should be noted that, in other examples of the present application, the driving assembly 40 of the variable focus camera module further includes a third driving element (not shown) for driving the third driving element of the light turning element 10 to move, so as to implement the optical anti-shake function of the variable focus camera module through the third driving element.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments, and any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

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

a photosensitive component corresponding to the zoom lens group; and

wherein the zooming part is mounted in the first carrier, the focusing part is mounted in the second carrier, the first driving element is configured to drive the first carrier to move the zooming part along the direction set by the optical axis, the second driving element is configured to drive the second carrier to move the focusing part along the direction set by the optical axis, wherein the first driving element and/or the second driving element is/are implemented as a piezoelectric actuator;

2. The variable focus camera module of claim 1, wherein said first drive element is implemented as a first piezoelectric actuator and said second drive element is implemented as a second piezoelectric actuator.

3. The variable focus camera module of claim 2, wherein at least a portion of the first piezoelectric actuator is disposed within the first receiving channel and at least a portion of the second piezoelectric actuator is disposed within the second receiving channel.

4. The variable focus camera module of claim 2, wherein the first piezoelectric actuator comprises a first piezoelectric active part, a first driven shaft driveably coupled to the first piezoelectric active part, and a first driving part tightly fitted to the first driven shaft, wherein under the action of the first piezoelectric active part and the first driven shaft, the first driving part is configured to drive the first carrier to move along the direction set by the optical axis; the second piezoelectric actuator comprises a second piezoelectric driving part, a second driven shaft driveably coupled to the second piezoelectric driving part, and a second driving part tightly matched with the second driven shaft, wherein under the action of the second piezoelectric driving part and the second driven shaft, the second driving part is configured to drive the second carrier to move along the direction set by the optical axis;

5. The variable focus camera module of claim 4, wherein the first and second piezoelectric actuators are disposed on a first side of the optical axis.

6. The variable focus camera module of claim 4, wherein the first and second piezoelectric actuators are disposed on a first side of the optical axis and a second side opposite the first side, respectively.

7. The variable focus camera module of claim 5, wherein said first piezoelectric actuator and said second piezoelectric actuator are arranged in opposite directions.

8. The variable focus camera module of claim 5, wherein said first piezoelectric actuator and said second piezoelectric actuator are arranged in the same direction.

9. The variable focus camera module of claim 7 or 8, wherein the first and second piezoelectric actuators have the same mounting height relative to the bottom surface of the drive housing.

10. The variable focus camera module of claim 6, wherein the first and second piezoelectric actuators are arranged either in opposite directions or in the same direction.

11. The variable focus camera module of claim 10, wherein the first and second piezoelectric actuators have the same mounting height relative to a bottom surface of the drive housing.

12. The variable focus camera module of claim 5, wherein a first piezo active portion of the first piezo actuator is adjacent to a second piezo active portion of the second piezo actuator.

13. The variable focus camera module of claim 5, wherein the first driven shaft of the first piezoelectric actuator is adjacent to a second driven shaft of the second piezoelectric actuator.

14. The variable focus camera module of claim 13, wherein a first piezoelectric active portion of the first piezoelectric actuator is mounted to a first sidewall of the drive housing and a second piezoelectric active portion of the second piezoelectric actuator is attached to a second sidewall of the drive housing opposite the first sidewall.

15. The variable focus camera module of claim 12 or 13, wherein the drive assembly further comprises a guide structure disposed on a second side of the optical axis opposite the first side, the guide structure being configured to guide the movement of the focusing portion and the zooming portion along the direction in which the optical axis is set.

16. The variable focus camera module of claim 15, wherein the guide structure comprises: the optical axis-parallel driving device comprises a first supporting part and a second supporting part which are formed on the driving shell at intervals, and at least one guide rod which is erected between the first supporting part and the second supporting part and penetrates through the first carrier and the second carrier, wherein the guide rod is parallel to the optical axis, so that the first carrier and the second carrier can be guided to move along the direction set by the guide rod parallel to the optical axis.

17. The variable focus camera module of claim 15, wherein the drive assembly further comprises a first guide mechanism configured to guide the movement of the zoom portion along the direction set by the optical axis and a second guide mechanism configured to guide the movement of the focus portion along the direction set by the optical axis.

18. The variable focus camera module of claim 17, wherein the first guide mechanism comprises a first mounting portion and a second mounting portion and at least a first guide rod mounted between the first mounting portion and the second mounting portion and passing through the first carrier, the first guide rod being parallel to the optical axis such that the first carrier can be guided to move in a direction set by the first guide rod parallel to the optical axis; the second guide mechanism comprises a third installation part, a fourth installation part and at least one second guide rod which is erected between the third installation part and the fourth installation part and penetrates through the second carrier, and the second guide rod is parallel to the optical axis, so that the second carrier can be guided to move along the direction set by the first guide rod which is parallel to the optical axis.

19. The variable focus camera module of claim 18, wherein said first guide bar and said second guide bar are flush with each other.

20. The variable focus camera module of claim 18, wherein a height of the first and second guide rods relative to a bottom surface of the drive housing is flush with a mounting height of the first and second driven shafts relative to the bottom surface of the drive housing.

21. The variable focus camera module of claim 17, wherein the first guide mechanism comprises at least one ball disposed between the first carrier and the drive housing, and a receiving slot disposed between the first carrier and the drive housing for receiving the at least one ball.

22. The variable focus camera module of claim 17, wherein said first guide mechanism comprises: the sliding rail is arranged between the driving shell and the first carrier and is suitable for the sliding of the sliding block.

23. The variable focus camera module of claim 21, wherein said second guide mechanism comprises at least one ball disposed between said second carrier and said drive housing, and a receptacle disposed between said second carrier and said drive housing for receiving said at least one ball.

24. The variable focus camera module of claim 22, wherein said second guide mechanism comprises: the sliding rail is arranged between the driving shell and the second carrier and is suitable for the sliding of the sliding block.

25. The variable focus camera module of claim 1, wherein the first carrier includes a first carrier base and first and second elongated arms integrally extending upwardly from the first carrier base, respectively, to form a first mounting cavity for mounting the zoom portion and a first opening communicating with the first mounting cavity between the first carrier base, the first elongated arm, and the second elongated arm.

26. The variable focus camera module of claim 25, wherein one of said at least one first receiving channel is formed in a side surface of said first carrier base, between a bottom surface of said first elongated arm and a bottom surface of said drive housing, and another of said at least one first receiving channel is formed in a side surface of said first carrier base, between a bottom surface of said second elongated arm and a bottom surface of said drive housing.

27. The variable focus camera module of claim 5, wherein the second carrier includes a second carrier base and third and fourth elongated arms integrally extending upwardly from the second carrier base, respectively, to form a second mounting cavity for mounting the focusing portion and a second opening communicating with the second mounting cavity between the second carrier base, the third elongated arm and the fourth elongated arm.

28. The variable focus camera module of claim 27, wherein one of said at least one second receiving channel is formed in a side surface of said second carrier base between a bottom surface of said third elongated arm and a bottom surface of said drive housing, and another of said at least one second receiving channel is formed in a side surface of said second carrier base between a bottom surface of said fourth elongated arm and a bottom surface of said drive housing.

29. The variable focus camera module of claim 1, wherein the magnitude of the driving force generated by the piezoelectric actuator is 0.6N to 2N.

30. The variable focus camera module of claim 1, wherein said first and second receiving channels are below said optical axis.

31. The variable focus camera module of claim 4 wherein the first and second driven shafts are mounted at a lower height relative to the bottom surface of the drive housing than the optical axis.

32. The variable focus camera module of claim 29, wherein said piezoelectric active portion comprises an electrode plate and at least one piezoelectric substrate stacked on said electrode plate.

33. The variable focus camera module of claim 32, wherein said at least one piezoelectric substrate comprises a first piezoelectric substrate and a second piezoelectric substrate, said electrode plate being sandwiched between said first piezoelectric substrate and said second piezoelectric substrate.

34. The variable focus camera module of claim 1, further comprising: and the light turning element is used for turning the imaging light to the zoom lens group.

35. The variable focus camera module of claim 34, further comprising: a third driving element for driving the light turning element.

36. The variable focus camera module of claim 1, wherein the zoom portion and the focus portion are disposed adjacent.

37. The variable focus camera module of claim 36, wherein the zoom portion is located between the fixed portion and the focus portion.

38. The variable focus camera module of claim 36, wherein the focusing portion is located between the fixed portion and the zooming portion.