Driving assembly for driving lens and camera module

Abstract

The application provides a driving assembly for driving a lens and a camera module. The driving assembly comprises a driving carrier having a carrier body for carrying an adjustable group of lenses; a driving element for providing a driving force for moving the driving carrier along an adjustment direction; and a friction plate arranged between the driving element and the carrier body of the driving carrier, one end of the friction plate being fixedly connected to the carrier body of the driving carrier and the other end of the friction plate being movably connected to the driving element. The driving element comprises an upper driving element and a lower driving element, which are arranged on both sides of the friction plate and clamp the friction plate therebetween. The overall height of the upper driving element, the lower driving element and the friction plate clamped therebetween is not greater than the maximum height of the carrier body of the driving carrier. The driving assembly and the camera module have a compact structure and can provide stable, reliable and large enough driving force.

Description

TECHNICAL FIELD

[0001] The present application relates to a driving assembly for driving a lens and a camera module. BACKGROUND

[0002] The description herein merely provides background information related to the present application and does not necessarily constitute the prior art.

[0003] With the improvement of living standards, consumers have higher and higher requirements for the camera function of terminal devices such as mobile phones and tablets. Not only do they require effects such as background blurring and night shooting, but they also demand telephoto. Consumers need terminal devices that can clearly capture the picture of a distant scene at different distances.

[0004] To achieve the above-mentioned telephoto function, an optical zoom lens is usually added to the camera module to form an optical zoom module. The optical zoom module changes the focal length of the lens by changing the distance between the lenses of the optical zoom lens to achieve zooming. It can clearly capture objects at different distances, and the imaging quality of the image it produces is relatively high. Here, zooming refers to changing the focal length to capture scenes at different distances.

[0005] However, due to the increasing demands of consumers, the parameters of the optical zoom module are constantly increasing, the size and weight of the lenses are constantly increasing, and the thrust required to drive the movement of the lenses is also increasing, thus the volume of the motor is also increasing. Moreover, the existing electromagnetic motor solution has a short stroke, a large volume, and electromagnetic interference, making it difficult to meet the needs of optical zoom for lens movement.

[0006] To achieve the telephoto function, an optical zoom lens is usually added to the camera module to form an optical zoom module. The optical zoom module changes the focal length of the lens by changing the distance between the lenses of the optical zoom lens to achieve zooming. It can clearly capture objects at different distances, and the imaging quality of the image it produces is relatively high. Here, zooming refers to changing the focal length to capture scenes at different distances.

[0007] The existing driving motor for driving optical zoom camera module adopts voice coil motor (VCM), shape memory alloy driver (SMA) and the like. With the increasing requirement for the imaging performance of the camera module, higher requirements are put forward for each component of the camera module, especially the zoom component. With the decrease of the limitation of the size increase, in order to realize stronger function, the component design of the camera module also brings the increase of the component size, thereby further increasing the weight of the component. In this case, the traditional electromagnetic motor can no longer provide sufficient driving force. For example, the existing voice coil motor driver can only drive the optical lens with a weight less than 100 mg, and the memory alloy motor needs a larger stroke space setting. That is, if the weight of the component to be driven in the camera module exceeds 100 mg, the existing driver will not meet the application requirement of the camera module or need to increase the size of the driver very much to provide larger thrust. Therefore, a new generation of driving scheme must be developed for the camera module. SUMMARY

[0008] An object of the present application is to provide a driving assembly for driving a lens and a camera module, wherein the driving elements and the friction plate for providing driving force to the driving carrier are reasonably configured and arranged, so as to ensure that the driving assembly and the camera module have a small enough size.

[0009] An object of the present application is to provide a driving assembly for driving a lens and a camera module, wherein the overall height of the upper driving element and the lower driving element and the friction plate clamped between the upper driving element and the lower driving element is not greater than the maximum height of the lens group, so as to ensure that the camera module has a small enough size in the height direction.

[0010] An object of the present application is to provide a driving assembly for driving a lens and a camera module, wherein the upper driving element and the lower driving element and the friction plate and the like components are reasonably configured and arranged, so that the upper driving element and the lower driving element can cooperatively drive the driving carrier for carrying the adjustable group of the lens, and provide stable, reliable and large enough driving force.

[0011] An object of the present application is to provide a driving assembly for driving a lens and a camera module, wherein the friction plate and the driving element and the like components of the first carrier and the second carrier are reasonably configured and arranged, so that the zoom group and the focusing group of the lens group avoid interference between each other during driving, and at the same time ensure that the structure of the driving assembly and the camera module is more compact.

[0012] One object of the present invention is to provide a driving component for driving a lens and a camera module, wherein the module structure design of the driving component and the camera module not only simplifies the module structure and reduces the module size and weight, but also provides a greater lens movement stroke and thrust.

[0013] To achieve the above objectives, according to a first aspect of this application, a driving assembly for driving a lens is provided, comprising:

[0014] A drive carrier having a carrier body with adjustable groups for carrying lenses;

[0015] A driving element for providing a driving force to move the driving carrier along the adjustment direction;

[0016] A friction plate is disposed between the driving element and the carrier body of the driving carrier, with one end of the friction plate fixedly connected to the carrier body of the driving carrier and the other end operatively connected to the driving element, so that the driving element can drive the friction plate to move along the adjustment direction.

[0017] The driving element includes an upper driving element and a lower driving element, which are disposed on both sides of the friction plate and clamp the friction plate in the middle, so that the friction plate can move along the adjustment direction under the cooperative driving action of the upper driving element and the lower driving element.

[0018] The overall height of the upper driving element, the lower driving element, and the friction plate sandwiched between the upper driving element and the lower driving element is not greater than the maximum height of the carrier body of the driving carrier.

[0019] According to some embodiments of the first aspect of this application, a pre-pressure device is provided to provide pre-pressure to the upper driving element and the lower driving element, such that the upper driving element and the lower driving element maintain frictional contact with the friction plate under the action of the pre-pressure.

[0020] According to some embodiments of the first aspect of this application, the pre-pressure device includes an upper clamping portion, a lower clamping portion, and a connecting portion connecting the upper clamping portion and the lower clamping portion, wherein the pre-pressure device elastically clamps a friction plate and an upper driving element and a lower driving element arranged on both sides of the friction plate between the upper clamping portion and the lower clamping portion of the pre-pressure device.

[0021] According to some embodiments of the first aspect of this application, the drive assembly further includes a drive substrate electrically connected to the upper drive element and the lower drive element for supplying current to the upper drive element and the lower drive element, wherein the drive substrate is clamped on the upper drive element and the lower drive element by the pre-pressure device.

[0022] According to some embodiments of the first aspect of this application, the driving substrate includes a first conductive end, a second conductive end, and a connecting strip connecting the first conductive end and the second conductive end, wherein the first conductive end is clamped on the upper driving element by the upper clamp of the pre-pressure device, and the second conductive end is clamped on the lower driving element by the lower clamp of the pre-pressure device.

[0023] According to some embodiments of the first aspect of this application, the second conductive end of the driving substrate is provided with an extension, wherein a position sensing element is provided on the extension, and a sensing magnet is provided on the friction plate opposite to the position of the position sensing element.

[0024] According to some embodiments of the first aspect of this application, the upper driving element and the lower driving element are configured as piezoelectric actuators, each including a piezoelectric plate and a friction driving part fixed on the piezoelectric plate, wherein the friction driving parts of the upper driving element and the lower driving element are respectively connected to the friction plate on both sides, thereby enabling them to collaboratively drive the friction plate to move along the adjustment direction.

[0025] According to some embodiments of the first aspect of this application, the drive assembly further includes a support mechanism having a plurality of positioning posts forming a placement space, wherein the upper drive element and the lower drive element are disposed in the placement space under the clamping of the pre-pressure device, wherein the drive base plate is fixed on the positioning posts of the support mechanism.

[0026] According to some embodiments of the first aspect of this application, the bearing mechanism further has a bearing connection portion, which is fixedly connected to the drive housing, wherein the drive housing includes an upper housing and a lower housing connected to the upper housing to form a closed structure.

[0027] According to some embodiments of the first aspect of this application, a connecting groove is provided on the side wall of the lower housing of the drive housing, and the bearing connection part of the bearing mechanism is embedded in the connecting groove for fixation.

[0028] According to some embodiments of the first aspect of this application, the side wall of the lower housing of the drive housing is further provided with an overlapping groove, the overlapping groove including an inner overlapping groove and an outer overlapping groove, the height of the inner overlapping groove being greater than the height of the outer overlapping groove.

[0029] According to some embodiments of the first aspect of this application, the drive assembly further includes a guide device configured to be slidably connected to the drive carrier, such that the drive carrier can move along the guide device under the cooperative drive of the upper drive element and the lower drive element.

[0030] According to some embodiments of the first aspect of the present application, the guide device comprises a guide rod, which passes through a connecting hole of a connecting end of the drive carrier in parallel to the adjustment direction, so that the drive carrier can be moved along the guide device under the cooperative driving of the upper driving element and the lower driving element.

[0031] According to some embodiments of the first aspect of the present application, the connecting end of the drive carrier comprises a first connecting end extending outward from a carrier body of the drive carrier and a second connecting end extending outward from the carrier body of the drive carrier, wherein the first connecting end and the second connecting end are respectively located on two sides of the carrier body opposite to each other, and

[0032] The guide device comprises a first guide rod and a second guide rod, wherein the first guide rod passes through a first connecting hole of a first connecting end of the drive carrier, and the second guide rod passes through a second connecting hole of a second connecting end of the drive carrier, so that the drive carrier can be moved along the first guide rod and the second guide rod of the guide device under the cooperative driving of the upper driving element and the lower driving element, wherein the first guide rod and the second guide rod are parallel to each other and arranged along the adjustment direction.

[0033] According to some embodiments of the first aspect of the present application, the first guide rod and the second guide rod of the guide device have a height difference.

[0034] According to the second aspect of the present application, a camera module is provided, comprising

[0035] The driving assembly for driving the lens as claimed in any one of claims 1 to 15;

[0036] A photosensitive assembly for receiving a light signal and converting the received light signal into an image signal;

[0037] A lens group comprising a fixed group and an adjustable group, wherein the adjustable group of the lens group is arranged to be cooperatively driven by the driving assembly under the cooperative driving of the upper driving element and the lower driving element.

[0038] According to some embodiments of the second aspect of the present application, the adjustable group of the lens group comprises a zoom group and a focus group, wherein the drive carrier of the driving assembly comprises a first carrier for carrying the zoom group and a second carrier for carrying the focus group, wherein the first carrier and the second carrier are coaxially arranged in sequence along the adjustment direction and can be driven individually.

[0039] According to some embodiments of the second aspect of the present application, the driving assembly further comprises:

[0040] A first driving element for providing a driving force for moving the first carrier along the adjustment direction;

[0041] a first friction plate disposed between the carrier body of the first carrier and the first driving element, wherein one end of the first friction plate is fixedly connected with the carrier body of the first carrier, and the other end is operatively connected with the first driving element, so that the first driving element can drive the first friction plate to move along the adjustment direction,

[0042] wherein the first driving element comprises a first upper driving element and a first lower driving element, which are disposed on both sides of the first friction plate and clamp the first friction plate therebetween, so that the first friction plate can move along the adjustment direction under the cooperative driving action of the first upper driving element and the first lower driving element;

[0043] a second driving element for providing a driving force for moving the second carrier along the adjustment direction;

[0044] a second friction plate disposed between the carrier body of the second carrier and the second driving element, wherein one end of the second friction plate is fixedly connected with the carrier body of the second carrier, and the other end is operatively connected with the second driving element, so that the second driving element can drive the second friction plate to move along the adjustment direction,

[0045] wherein the second driving element comprises a second upper driving element and a second lower driving element, which are disposed on both sides of the second friction plate and clamp the second friction plate therebetween, so that the second friction plate can move along the adjustment direction under the cooperative driving action of the second upper driving element and the second lower driving element.

[0046] According to some embodiments of the second aspect of the present application, the first upper driving element and the first lower driving element disposed on both sides of the first friction plate and clamping the first friction plate therebetween are located on a first side of the driving assembly, and the second upper driving element and the second lower driving element disposed on both sides of the second friction plate and clamping the second friction plate therebetween are located on a second side of the driving assembly, wherein the first side and the second side are opposite to each other with respect to the axis of the first carrier and the second carrier.

[0047] According to some embodiments of the second aspect of the present application, the overall height of the first upper driving element and the first lower driving element and the first friction plate clamped therebetween is not greater than the maximum height of the lens group, and the overall height of the second upper driving element and the second lower driving element and the second friction plate clamped therebetween is not greater than the maximum height of the lens group. BRIEF DESCRIPTION OF DRAWINGS

[0048] The technical solutions of the present application will be further described in detail below in combination with the drawings and examples. In the drawings, the same reference signs are used to represent the same parts unless otherwise specified. Among them:

[0049] Figure 1 is a light path schematic diagram of some embodiments of the camera module according to the present application;

[0050] Figure 2 is a schematic cross-sectional view of some embodiments of the camera module according to the present application;

[0051] Figure 3 is an exploded view of some embodiments of the drive assembly according to the present application;

[0052] Figure 4 is an exploded view of the drive carrier and the friction plate according to some embodiments of the present application;

[0053] Figure 5 is an axial view of some embodiments of the first carrier according to the present application;

[0054] Figure 6 is an axial view of some embodiments of the second carrier according to the present application;

[0055] Figure 7 is a perspective view of the first carrier and the second carrier according to some embodiments of the present application, including the first friction plate and the second friction plate fixedly connected with the first carrier and the second carrier respectively;

[0056] Figure 8 is an axial view of the first carrier and the second carrier according to some embodiments of the present application, including the first friction plate and the second friction plate fixedly connected with the first carrier and the second carrier respectively, and the first guide rod and the second guide rod penetrating through the first carrier and the second carrier respectively;

[0057] Figure 9 is Figure 8 a perspective view of the structure state shown;

[0058] Figure 10 is a plan view of the first carrier and the second carrier according to some embodiments of the present application, including the first friction plate and the second friction plate fixedly connected with the first carrier and the second carrier respectively, the first guide rod and the second guide rod penetrating through the first carrier and the second carrier, and the first and second drive elements driving the first friction plate and the second friction plate respectively;

[0059] Figure 11 is Figure 10 a perspective view of the structure state shown;

[0060] Figure 12 a-c are schematic diagrams of the action relationship between the piezoelectric driver and the friction plate according to some embodiments of the present application;

[0061] Figure 13is a schematic side view of a first carrier according to some embodiments of the present application, comprising an assembled first friction plate, a first drive element and a first friction mechanism;

[0062] Figure 14 is a schematic side view of a second carrier according to some embodiments of the present application, comprising an assembled second friction plate, a second drive element and a second friction mechanism;

[0063] Figure 15 is a schematic side view of a first carrier according to some embodiments of the present application, comprising a first upper drive element and a first lower drive element on both sides of the first friction plate;

[0064] Figure 16 a-d are schematic diagrams of piezoelectric drive principles according to some embodiments of the present application;

[0065] Figure 17 is a schematic side view of a second carrier according to some embodiments of the present application, comprising a second upper drive element and a second lower drive element on both sides of the second friction plate;

[0066] Figure 18 is a perspective view of a drive assembly according to some embodiments of the present application;

[0067] Figure 19 is a perspective view of a pre-stress device according to some embodiments of the present application;

[0068] Figure 20 is a perspective view of a drive substrate according to some embodiments of the present application;

[0069] Figure 21 is a perspective view of a drive assembly according to some embodiments of the present application, comprising an installed pre-stress device and a drive substrate;

[0070] Figure 22a is an axial view of a drive assembly according to some embodiments of the present application, wherein each friction plate is equipped with one drive element and one friction mechanism on both sides;

[0071] Figure 22b is an axial view of a drive assembly according to further embodiments of the present application, wherein each friction plate is equipped with one upper drive element and one lower drive element on both sides;

[0072] Figure 23 is a perspective view of a drive assembly according to some embodiments of the present application, comprising an installed carrier mechanism;

[0073] Figure 24 is a perspective view of a carrier mechanism according to some embodiments of the present application;

[0074] Figure 25is a perspective view of a driving assembly according to some embodiments of the present application, including a driving housing having an upper housing and a lower housing;

[0075] Figure 26 is a flowchart of an assembling method of a driving assembly for driving a lens according to some embodiments of the present application;

[0076] Figure 27 is a flowchart of an assembling method of a camera module according to some embodiments of the present application. DETAILED DESCRIPTION

[0077] For a better understanding of the present application, various aspects of the present application will be described in greater detail below with reference to the accompanying drawings. It is to be understood that the detailed description is merely exemplary of the application and is not intended to limit the scope of the application in any way. Throughout the specification, like reference numerals refer to like elements in which:

[0078] It should be noted that the terms first, second, third, etc. are used herein only to distinguish one element from another, and do not imply any limitation on the elements. Thus, the first driving element discussed below can also be referred to as a zoom driving element, and the second driving element can also be referred to as a focus driving element, without departing from the teachings of the present application. Similarly, the first driving substrate can also be referred to as a zoom substrate, and the second driving substrate can also be referred to as a focus substrate, and so on.

[0079] In the drawings, the thickness, size, and shape of the lenses have been exaggerated slightly for ease of explanation. Specifically, the structural shapes shown in the drawings are shown by way of example. The drawings are merely examples and are not drawn to scale.

[0080] It should also be understood that the terms "comprises", "comprising", "includes", "including", "has", "having" and / or "contains", when used in this specification, specify the presence of stated features, elements and / or components, but do not preclude the presence or addition of one or more other features, elements, components and / or groups thereof. Furthermore, when describing the embodiments of the present application, the use of "may" means that one or more embodiments of the present application. Also, the term "exemplary" is intended to mean an example or an illustration.

[0081] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense unless expressly so specified herein.

[0082] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0083] like Figures 1-2 As shown, the camera module 100 according to some embodiments of this application is implemented as a periscope camera module, which includes a zoom lens group 10, a driving assembly 20, a photosensitive assembly 30, and a light-deflecting element 40. The zoom lens group 10 is also referred to as a lens in the following description. The light-deflecting element 40 is used to receive imaging light from the subject and deflect the imaging light to the zoom lens group 10. The zoom lens group 10 corresponds to the light-deflecting element 40 and is used to receive the imaging light from the light-deflecting element 40 and converge the imaging light. The zoom lens group 10 is disposed on the light-sensing path of the photosensitive assembly 30. The photosensitive assembly 30 corresponds to the zoom lens group 10 and is used to receive the imaging light from the zoom lens group 10 and form an image.

[0084] In some embodiments of this application, the light-deflecting element 40 is configured to deflect the imaging light from the target by 90°, thereby reducing the overall height of the zoom camera module 100. Here, considering manufacturing tolerances, in actual operation, the angle at which the light-deflecting element 40 deflects the imaging light may have an error of less than 1°, which should be understood by those skilled in the art.

[0085] In a specific example of this application, the light-deflecting element 40 can be implemented as a reflector (e.g., a plane reflector) or a light-deflecting prism (e.g., a triangular prism). For example, when the light-deflecting element 40 is implemented as a light-deflecting prism, the light incident surface and the light exiting surface of the light-deflecting prism are perpendicular to each other, and the light reflecting surface of the light-deflecting prism is inclined at a 45° angle to the light incident surface and the light exiting surface. In this way, when the imaging light enters the light-deflecting prism perpendicular to the light incident surface, the imaging light can be deflected at 90° at the light reflecting surface and output from the light exiting surface perpendicular to the light exiting surface.

[0086] Of course, in other embodiments of this application, the light-deflecting element 40 can also be implemented as other types of optical elements, and this is not limited to this embodiment. Furthermore, in some embodiments of this application, the zoom camera module 100 can also include a greater number of light-deflecting elements 40, one reason being that one function of introducing the light-deflecting element 40 is to deflect the imaging light rays, enabling structural folding of the optical system of the zoom camera module 100, which has a relatively long total track length (TTL). Accordingly, when the total track length (TTL) of the zoom camera module 100 is too long, a greater number of light-deflecting elements 40 can be provided to meet the size requirements of the zoom camera module 100. For example, the light-deflecting element 40 can be positioned on the image side of the zoom camera module 100 or between any two lenses in the zoom lens group 10.

[0087] like Figures 1-2 As shown, in some embodiments of this application, the zoom lens group 10 includes a fixed group 11 and an adjustable group. The adjustable group includes, for example, a zoom group 12 and a focus group 13. Obviously, the adjustable group can include other lens groups that need to be adjusted, and their number and type can be set as needed, and are not limited to the examples herein. For example, the adjustable group can include only one zoom group 12, only one focus group 13, or any combination of focus group 13 and zoom group 12. Optionally, each adjustable lens group is provided with a separate drive carrier and drive element, thereby enabling each lens group to be adjusted independently of each other.

[0088] It should be pointed out that, Figures 1-2 The dashed line in the diagram represents the optical axis along which the light beam propagates within the camera module 100. The drive carrier carries the adjustable group of lenses, thus enabling adjustment and movement along the optical axis. It should be noted that the adjustment direction, drive direction, and optical axis direction coincide here. In the following description, "along the optical axis" and "along the drive direction" are therefore also referred to as "along the adjustment direction," meaning that the adjustment direction of the drive carrier, as an azimuth reference, is the same as the optical axis. For the same reason, the geometric axis of the drive carrier also coincides with the optical axis and the adjustment direction. In the following text, directions expressed using these terms are technically equivalent unless otherwise specified.

[0089] The fixed group 11 includes a first lens barrel 111 and at least one optical lens 112 accommodated in the first lens barrel 111. In some embodiments of the present application, the fixed group 11 is adapted to be fixed to a non-moving part of the driving assembly 20, i.e., the position of the fixed group 11 in the zoom lens group 10 remains constant, and the fixed group 11 does not move in position when the variable focus camera module 100 implements the optical focusing and / or optical zooming functions. It is worth mentioning that in other embodiments of the present application, the fixed group 11 can also not be provided with the first lens barrel 111, and only include at least one optical lens 112, for example, only include multiple optical lenses 112 that are embedded with each other. That is, in other embodiments of the present application, the fixed group 111 can be implemented as a "bare lens". The number of the fixed group 11 is at least one.

[0090] The zoom group 12 includes a second lens barrel 121 and at least one optical lens 122 accommodated in the second lens barrel 121, wherein the zoom group 12 is adapted to be driven by the driving assembly 20 to move along the optical axis direction set by the zoom lens group 10, thereby realizing the optical zooming function of the variable focus camera module 100, so that the variable focus camera module 100 can realize clear shooting of subjects at different distances. It is worth mentioning that in other embodiments of the present application, the zoom group 12 can also not be provided with the second lens barrel 121, and only include at least one optical lens 122, for example, only include multiple optical lenses 122 that are embedded with each other. That is, in other embodiments of the present application, the zoom group 12 can also be implemented as a "bare lens". The number of the zoom group 12 is at least one.

[0091] The focusing group 13 includes a third lens barrel 131 and at least one optical lens 132 accommodated in the third lens barrel 131, wherein the focusing group 13 is adapted to be driven by the driving assembly 20 to move along the optical axis direction set by the zoom lens group 10, thereby realizing the focusing function of the variable focus camera module 100. More specifically, the optical focusing realized by driving the focusing group 13 can compensate for the focus shift caused by moving the zoom group 12, thereby compensating for the imaging performance of the variable focus camera module 100, so that the imaging quality meets the preset requirements. It is worth mentioning that in other embodiments of the present application, the focusing group 13 can also not be provided with the third lens barrel 131, and only include at least one optical lens 132, for example, only include multiple optical lenses 132 that are embedded with each other. That is, in other embodiments of the present application, the focusing group 13 can also be implemented as a "bare lens". The number of the focusing group 13 is at least one.

[0092] In some embodiments of the present application, preferably, the fixed group 11, the zoom group 12, and the focus group 13 are arranged in sequence along the optical axis direction of the zoom lens group 10 (i.e., in the zoom lens group 10, the zoom group 12 is located between the fixed group 11 and the focus group 13), that is, the imaging light from the light folding element 40 will sequentially pass through the fixed group 11, the zoom group 12, and then the focus group 13 when passing through the zoom lens group 10. The zoom group 12 and the focus group 13 can be adjusted in position relative to the fixed group 11 under the driving of the driving assembly 20, so as to realize the adjustment of the optical performance of the variable focus camera module 100, including but not limited to the optical focusing and optical zoom functions. Of course, in other embodiments of the present application, the relative position relationship among the fixed group 11, the zoom group 12, and the focus group 13 can be adjusted according to the optical design requirements and structural design requirements of the variable focus camera module 100, for example: the fixed group 11, the focus group 13, and the zoom group 12 are arranged in sequence along the optical axis direction of the zoom lens group 10, that is, the focus group 13 is arranged between the fixed group 11 and the zoom group 12. Alternatively, the zoom group 12, the fixed group 11, and the focus group 13 are arranged in sequence along the optical axis direction of the zoom lens group 10, that is, the fixed group 11 is arranged between the focus group 13 and the zoom group 12. However, particularly in some embodiments of the present application, considering the structural design of the variable focus camera module 100, preferably, the focus group 13 and the zoom group 12 are arranged adjacently. That is, according to the positions of the various parts in the zoom lens group 10 of some embodiments of the present application, preferably, the zoom group 12 is located between the fixed group 11 and the focus group 13, or the focus group 13 is located between the fixed group 11 and the zoom group 12. It should be understood that the zoom group 12 and the focus group 13 are the parts that need to be moved in the zoom lens group 10, and therefore, the arrangement of the focus group 13 and the zoom group 12 adjacently is beneficial for arranging the driving assembly 20, which will be described in detail in the specific description of the driving assembly 20.

[0093] It is also worth mentioning that, in the case of Figure 2In the embodiment shown, although the zoom lens group 10 is taken as an example, including one fixed group 11, one zoom group 12 and one focusing group 13, it should be known by those skilled in the art that in other embodiments of the present application, the specific number of the fixed group 11, the zoom group 12 and the focusing group 13 is selected and limited to this embodiment, which can be adjusted according to the optical design requirements of the variable zoom camera module 100.

[0094] In order to limit the imaging light entering the photosensitive assembly 30, in some examples of the present application, the variable zoom camera module 100 further includes a light blocking element (not shown) arranged on the photosensitive path of the photosensitive assembly 30, wherein the light blocking element can at least partially block the projection of imaging light to reduce the influence of stray light on the imaging quality of the variable zoom camera module 100 as much as possible. Preferably, the light blocking element is arranged on the light entrance surface or the light exit surface of the light turning element 40.

[0095] As shown in Figure 1 and Figure 2 In some embodiments of the present application, the photosensitive assembly 30 includes a circuit board 31, a photosensitive chip 32, an electronic element 33, a base 34 and a filter element 35. The photosensitive chip 32 is arranged on the circuit board 31 and electrically connected to the circuit board 31. The base 34 is arranged on the circuit board 31 and located on the side of the photosensitive chip 32, and the filter element 35 is mounted on the base 34 to be held on the photosensitive path of the photosensitive chip 32. The photosensitive chip 32 includes a photosensitive area and a non-photosensitive area surrounding the photosensitive area.

[0096] In one example of the present application, the photosensitive chip 32 is mounted on the upper surface of the circuit board 31 and electrically connected to the circuit board 31 by means of gold wire bonding. Of course, in other embodiments of the present application, the photosensitive chip 32 can also be arranged on the circuit board 31 and / or electrically connected to the circuit board 31 in other ways, for example, attached to the lower surface of the circuit board 31 in a flip-chip manner, and this is not limited to this embodiment. It should be understood that in some embodiments of the present application, the photosensitive path of the photosensitive chip 32 forms the photosensitive path of the photosensitive assembly 30.

[0097] The base 34 is arranged on the circuit board 31 to encapsulate the electronic devices on the circuit board 31 and to support other components. In one specific example of the present application, the base is implemented as a separately formed plastic support which is attached to the surface of the circuit board 31 by adhesive and is used to support other components. Of course, in other embodiments of the present application, the base can also be formed on the circuit board 31 in other ways, for example, the base is implemented as a molded base which is integrally formed in a predetermined position of the circuit board 31 by a molding process, and is not limited to this embodiment.

[0098] In some embodiments of the present application, the filter element 35 is held in the light sensing path of the light sensing chip 32 for filtering the imaging light entering the light sensing chip 32. In one specific example, the filter element 35 is mounted on the base 34 and corresponds to at least the light sensing region of the light sensing chip 32, in this way, the filter element 35 is held in the light sensing path of the light sensing chip 32. It is worth mentioning that in other embodiments of the present application, the filter element 35 can also be mounted on the base 34 in other ways, for example, a filter element 35 support is first arranged on the base 34, and then the filter element 35 is mounted on the filter element 35 support, that is, in this example, the filter element 35 can be indirectly mounted on the base 34 by other supports. And in other embodiments of the present application, the filter element 35 can also be mounted at other positions of the variable focus camera module 100, for example, the filter element 35 is formed in the zoom lens group 10 (for example, as a layer of filter film attached to the surface of a certain optical lens of the zoom lens group 10), and is not limited to this embodiment.

[0099] As mentioned earlier, according to the development trend of high-pixel, large-chip, and small-size camera modules, this puts forward more technical requirements for the drive assembly 20 for driving the focus group 13 and the zoom group 12 of the zoom lens group 10. Mainly including: relatively larger driving force, and better driving performance (specifically including: higher precision driving control and longer driving stroke). After research and experiment, the present inventors propose a piezoelectric actuator with a new structure, which can meet the technical requirements of the variable focus camera module 100 for the driver. And further, the piezoelectric actuator is arranged in the variable focus camera module 100 in a suitable arrangement manner, so as to meet the structural design requirements and size design requirements of the variable focus camera module 100.

[0100] According to one aspect of the present application, a drive assembly 20 for driving a lens is proposed, comprising:

[0101] a drive carrier 22 having a carrier body for carrying an adjustable group of lenses;

[0102] a drive element 21 for providing a driving force for moving the drive carrier along an adjustment direction;

[0103] a friction plate having one end fixedly connected with the carrier body of the drive carrier 22 and the other end movably connected with the drive element 21, so that the drive element 21 can drive the friction plate to move along the adjustment direction.

[0104] It is to be noted that in the drive assembly 20 according to the present application, one or more drive carriers 22 can be included, and in particular, each drive carrier 22 can be provided with a respective drive element 21, so that each drive carrier 22 can carry an adjustable group of lenses and can be driven by the corresponding drive element 21 to move along the adjustment direction, thereby achieving zooming or focusing or other optical functions. Correspondingly, each drive element 21 can be provided with corresponding components, including the friction plate, the friction mechanism 215, the pre-stress device 23, the drive substrate 27, the bearing mechanism 25, and the like. In the following description with reference to the accompanying drawings, the drive assembly 20 includes two drive carriers as an example, i.e., a first carrier 221 and a second carrier 222, but this example does not limit the inventive concept. Obviously, the drive assembly 20 can include one, three or more drive carriers, and the structures, functions and effects described below can also be achieved. Similarly, the structures, components and features described below in connection with the first carrier 221 and the second carrier 222 are also applicable to the drive assembly 20 including one, three or more drive carriers, and in particular, the description given for the first carrier 221 and the related components is also applicable to the case where the drive assembly 20 includes only one drive carrier, and therefore, the following description will not be explained separately.

[0105] Figure 3 is an exploded view of some embodiments of the drive assembly 20 according to the present application. As shown in Figure 3 the drive assembly 20 includes the drive element 21, the drive carrier 22, the pre-stress device 23, the guide device 24, the bearing mechanism 25, the drive housing 26, the drive substrate 27 and the position sensing element 28.

[0106] In the present application, the adjustable group of the zoom lens set 10 is arranged in the drive carrier 22, and the drive carrier 22 is driven by the drive element 21 to move, thereby driving the zoom lens set 10 to move, so as to achieve the optical focusing and / or optical zooming function of the variable focus camera module 100. Here, the drive element 21 provides a driving force for moving the drive carrier 22 along the adjustment direction, i.e., along the optical axis direction of the lens set.

[0107] The driving assembly 20 is configured to drive the zoom group 12 and the focus group 13 of the zoom lens group 10, so that the distance between the zoom group 12 and the focus group 13 relative to the photosensitive chip 32 is adjusted, thereby achieving the optical focusing and / or optical zooming function of the variable focus camera module 100.

[0108] A friction plate is arranged between the driving element 21 and the carrier body of the driving carrier 22, one end of the friction plate is fixedly connected with the carrier body of the driving carrier 22, and the other end is movably connected with the driving element 21, so that the driving element 21 can drive the friction plate to move along the adjusting direction.

[0109] The driving assembly 20 further comprises a pre-pressure device 23 configured to provide a pre-pressure to the driving element 21, so that the driving element 21 is in frictional contact with the friction plate under the action of the pre-pressure. For example, the pre-pressure device 23 can comprise an upper clamping portion 231, a lower clamping portion 233, and a connecting portion 232 connecting the upper clamping portion and the lower clamping portion, and the friction plate and the driving elements 21 and the possible friction mechanism 215 arranged on both sides of the friction plate are elastically clamped between the upper clamping portion 231 and the lower clamping portion 233 of the pre-pressure device 23.

[0110] The driving assembly 20 further comprises a guide device 24 arranged on the driving carrier 22, and the moving direction of the driving carrier 22 is controlled through the guide device 24, so as to realize the guiding effect of the guide device 24. For example, the guide device 24 is arranged in sliding connection with the driving carrier 22, so that the driving carrier 22 can move along the guide device 24 under the driving of the driving element 21. As an example, the guide device 24 comprises a guide rod which passes through the connecting hole of the driving carrier 22 in parallel to the adjusting direction, so that the driving carrier 22 can move along the guide device 24 under the driving of the driving element 21. Obviously, the guide device 24 can also be configured as other known sliding guide structures, such as sliding rails, guide grooves, etc.

[0111] The driving assembly 20 can further comprise a friction mechanism 215 arranged between the pre-pressure device 23 and the friction plate, so that the friction plate is movably connected with the pre-pressure device 23 through the friction mechanism 215, and the pre-pressure device 23 presses the friction mechanism 215 against the friction plate. For example, the driving element 21 can be arranged on one side of the friction plate, and the friction mechanism 215 can be arranged on the opposite side of the friction plate, so that the friction plate is clamped between the driving element 21 and the friction mechanism 215 under the action of the pre-pressure device 23, and the friction plate can move along the adjusting direction under the driving action of the driving element.

[0112] The drive assembly 20 can further comprise a drive substrate 27, which is arranged between the pre-tensioning device 23 and the drive element 21 for supplying the drive element 21 with electric current. To this end, the drive substrate 27 extends to the circuit board 31 of the light-sensitive assembly 30 in order to enable the electrical circuit of the drive assembly 20 to be closed. Furthermore, the drive substrate 27 can be clamped to the drive element 21 by means of the pre-tensioning device 23.

[0113] The drive assembly 20 can further comprise a position-sensing element 28, which is arranged for sensing the position of a moving component, for example the movement position of the drive carrier 22 or of the friction plate. Alternatively, the position-sensing element 28 can be fixed to the drive substrate 27. Alternatively, the second electrically conductive end of the drive substrate 27 is provided with an extension, which extends inwards towards the optical axis or the direction of the drive carrier 22 and is opposite the guide device 24 on the basis of the friction plate or the plane in which the friction plate is arranged. The position-sensing element 28 is arranged on the extension and a sensing magnet is arranged on the friction plate opposite the position-sensing element 28.

[0114] The drive assembly 20 can further comprise a drive housing 26, which serves as an outer housing of the drive assembly 20 and encloses the components described above in an inner space of the housing. For example, the drive housing 26 can comprise an upper housing 261 and a lower housing 262, which is connected to the upper housing 261 in a closed configuration. After assembly has been completed, the upper housing 261 and the lower housing 262 can be connected and fixed and form a closed space.

[0115] The drive assembly 20 can further comprise a carrier mechanism 25. For example, the carrier mechanism 25 can be arranged between the pre-tensioning device 23 and the drive housing 26 and can not only provide support for the drive element 21, the drive carrier 22 and the pre-tensioning device 23, but also fix the drive element 21 and the pre-tensioning device 23 to the drive housing 26 by means of the carrier mechanism 25.

[0116] For example, the pre-tensioning device 23 can be arranged in a mounting space of the carrier mechanism 25, for example by means of a resilient snap-in connection in the mounting space. The mounting space can be formed, for example, by a plurality of projecting positioning posts 251 of the carrier mechanism 25. As viewed transversely to the adjustment direction, the pre-tensioning device 23 is thus arranged between the drive carrier 22 and the carrier mechanism 25 and provides a certain pre-tension for the drive element 21, such that the drive element 21 and the drive carrier 22, in particular the friction plate, can be kept in frictional contact under the action of the pre-tension.

[0117] In some embodiments, the drive carrier 22 further comprises a connecting end extending outwardly from the carrier body of the drive carrier 22, the connecting end having a connecting hole, and the guide device 24 comprises a guide rod, the guide rod passing through the connecting hole of the connecting end of the drive carrier 22 parallel to the adjustment direction, so that the drive carrier 22 can move along the guide device 24 under the drive of the drive element 21.

[0118] In particular, the first carrier 221 comprises a first connecting end 22121 extending outwardly from the carrier body 2211 of the first carrier 221 and a second connecting end 22122 extending outwardly from the carrier body 2211 of the first carrier 221, wherein the first connecting end 22121 and the second connecting end 22122 are respectively located on two sides of the carrier body 2211 of the first carrier 221 opposite to each other, wherein the first connecting end 22121 of the first carrier 221 has a first connecting hole 221211, the second connecting end 22122 of the first carrier 221 has a second connecting hole 221221, and

[0119] The second carrier 222 further comprises a first connecting end 22221 extending outwardly from the carrier body 2221 of the second carrier 222 and a second connecting end 22222 extending outwardly from the carrier body 2221 of the second carrier 222, wherein the first connecting end 22221 and the second connecting end 22222 are respectively located on two sides of the carrier body 2221 of the second carrier 222 opposite to each other, wherein the first connecting end 22221 of the second carrier 222 has a first connecting hole 222211, the second connecting end 22222 of the second carrier 222 has a second connecting hole 222221.

[0120] The guide device 24 comprises a first guide rod 241 and a second guide rod 242, wherein the first guide rod 241 passes through the second connecting hole 221221 of the second connecting end 22122 of the first carrier 221 and the first connecting hole 222211 of the first connecting end 22221 of the second carrier 222, and the second guide rod 242 passes through the first connecting hole 221211 of the first connecting end 22121 of the first carrier 221 and the second connecting hole 222221 of the second connecting end 22222 of the second carrier 222, so that the first carrier 221 and the second carrier 222 can respectively move along the first guide rod 241 and the second guide rod 242 of the guide device 24 under the drive of the first drive element and the second drive element, wherein the first guide rod 241 and the second guide rod 242 are arranged parallel to each other along the adjustment direction.

[0121] According to some embodiments of the present application, a structure space is formed between the driving element 21 and the carrier body of the driving carrier 22. Among them, the friction plate is arranged in the structure space between the driving element 21 and the carrier body of the driving carrier 22, and one end of the friction plate is fixedly connected with the carrier body of the driving carrier 22, and the other end is actionally connected with the driving element 21, so that the driving element 21 can drive the friction plate to move along the adjustment direction. Therefore, the friction plate arranged in the structure space between the driving element and the carrier body of the driving carrier divides the structure space into a first structure space and a second structure space opposite to the first structure space. Here, the first structure space and the second structure space opposite to the first structure space are embodied as the upper space and the lower space of the friction plate in the drawing, for example.

[0122] Specifically, in combination with the first carrier 221 and the second carrier 222 in the drawing, the following is described in detail.

[0123] Figure 4 is an exploded view of the driving carrier 22 and the friction plate according to some embodiments of the present application. For this purpose, the driving carrier 22 comprises a first carrier 221 and a second carrier 222, for example, which are used to carry at least one adjustable group of the lens, such as the zoom group 12 and the focus group 13, respectively, wherein the first carrier 221 and the second carrier 222 are arranged in sequence on the same axis along the adjustment direction and can move along the adjustment direction independently of each other.

[0124] Specifically, as shown in Figures 5-7 , the driving carrier 22 comprises a first carrier 221 and a second carrier 222, which are arranged in sequence along the optical axis direction of the zoom lens group 10, and the first carrier 221 and the second carrier 222 are moved along the optical axis direction or the adjustment direction under the driving of the first driving element 211 and the second driving element 212, respectively. For this purpose, referring to Figure 10 , the driving assembly 20 comprises a first driving element 211 for providing a driving force for moving the first carrier 221 along the adjustment direction, and a second driving element 212 for providing a driving force for moving the second carrier 222 along the adjustment direction.

[0125] The zoom group 12 is mounted on the first carrier 221, and the focus group 13 is mounted on the second carrier 222. Of course, the focus group 13 can also be mounted on the first carrier 221, and the zoom group 12 can be mounted on the second carrier 222. In the present application, the zoom group 12 and the focus group 13 are arranged on two carriers respectively, which avoids interference between the zoom group 12 and the focus group 13 during movement, thereby affecting the effect of optical zoom and / or optical focus.

[0126] The first carrier 221 comprises a first carrier body 2211 and a connecting end 2212.

[0127] The first carrier body 2211 has a receiving cavity 22111 therein, which can receive the focusing group 13 or the zoom group 12 therein.

[0128] The connecting end 2212 of the first carrier 221 comprises a first connecting end 22121 arranged on a first side wall of the first carrier body 2211 and extending outwardly, and a second connecting end 22122 arranged on a second side wall of the first carrier body 2211 and extending outwardly, the first and second side walls of the first carrier body 2211 being located on opposite sides along the optical axis direction or adjustment direction.

[0129] The first connecting end 22121 has a first connecting hole 221211 formed therein, so as to connect the guide device 24 with the first carrier 221 through the connecting hole.

[0130] The second connecting end 22122 has a second connecting hole 221221 formed therein, so as to connect the guide device 24 with the first carrier 221 through the connecting hole.

[0131] The second connecting end 22122 further has a mounting groove 221222 formed therein, for mounting the first friction plate 2213.

[0132] In the examples of the present application, the first connecting hole 221211 and the second connecting hole 221221 can be in a through-hole structure or a groove structure. Preferably, the first connecting hole 221211 is in a groove structure, and the second connecting hole 221221 is in a through-hole structure.

[0133] In some embodiments of the present application, the first connecting hole 221211 and the second connecting hole 221221 have a certain height difference, the first connecting hole 221211 is located at the lower end of the first carrier 221, and the second connecting hole 221221 is located at the upper end of the first carrier 221. This arrangement can provide a certain relief space or structural space for other elements in the drive assembly 20, fully utilize the spatial position in the drive assembly 20, and make the structure of the zoom camera module more compact.

[0134] Of course, in other embodiments of this application, the first connecting hole 221211 and the second connecting hole 221221 may also have the same height, that is, both are located at the upper or lower end of the first carrier 221. The first friction plate 2213 is disposed in the mounting groove 221222 of the second connecting end 22122.

[0135] The first friction plate 2213 and the first carrier 221 can be an integral structure or a separate structure. That is, the first friction plate 2213 can be integrally formed with the first carrier 221, or it can be embedded in the mounting groove 221222 of the second connecting end 22122 and thus fixed to the first carrier 221.

[0136] The first friction plate 2213 has a cubic structure, meaning that the first driving element 211 makes frictional contact with a friction surface of the first friction plate 2213, thereby driving the first friction plate 2213 to move the first carrier 221. The length of the friction surface of the first friction plate 2213 along the optical axis or the adjustment direction is greater than or equal to the travel distance of the first carrier 221. In this application, there is at least one first connecting hole 221211 and at least one second connecting hole 221221. For example, two second connecting holes 221221 can be provided at a certain distance from each other. The outer wall of the second connecting hole 221221 can form an inner wall of the mounting groove 221222.

[0137] like Figure 11 , Figure 22a As shown in -b, the first friction plate 2213 is disposed between the first carrier 221 and the first driving element 211. One end of the first friction plate 2213 is kinetically connected to the first driving element 211, for example, through frictional contact. The other end of the first friction plate 2213 extends inward and is fixedly connected to the first carrier body 2211 of the first carrier 221. The inward direction refers to the direction toward the optical axis.

[0138] Herein, the guide device 24 and the position sensing element 28 are arranged in the free space or structural space formed between the first carrier body 2211 and the first driving element 211. Specifically, the first friction plate 2213 connects the first carrier 221 and the first driving element 211, and the first friction plate 2213 extends inwardly to provide a certain avoiding space for the guide device 24 and the position sensing element 28 in the driving assembly 20. In other words, one end of the first friction plate 2213 is fixedly connected with the first carrier body 2211 of the first carrier 221, and the other end is actionally connected with the first driving element 211, so that the first driving element 211 can drive the first friction plate 2213 to move along the adjustment direction. Therefore, the first friction plate 2213 arranged in the structural space between the first driving element 211 and the first carrier body 2211 of the first carrier 221 divides the structural space into a first structural space and a second structural space opposite to the first structural space. Herein, the first structural space and the second structural space opposite to the first structural space are embodied as the upper space and the lower space of the first friction plate 2213 in the drawings, for example.

[0139] The position sensing element 28 for sensing the moving position of the first carrier 221 or the first friction plate 2213 can be arranged in the first structural space, and the guide device 24 for guiding the first carrier 221 to move along the adjustment direction, especially the guide rod of the guide device 24, can be arranged in the second structural space opposite to the first structural space. In other words, the guide device 24 and the position sensing element 28 can be arranged in the upper space and the lower space of the first friction plate 2213, respectively, so that the structure of the variable focal camera module 100 is more compact.

[0140] Herein, the first carrier 221 and its corresponding components are taken as an example to illustrate the composition, structure and arrangement, which are also applicable to the second carrier 222 described below, and also applicable to the case that the driving assembly 20 only includes one driving carrier, in which case the first carrier 221 is the only driving carrier.

[0141] The second carrier 222 can have the same structure as the first carrier 221, or can have a different structure. In this application, the case that the second carrier 222 has the same structure as the first carrier 221 is taken as an example for introduction. It should be noted that the structures and arrangements of the related components of the first carrier 221 described above are also applicable to the structures and arrangements of the related components of the second carrier 222, unless otherwise specified.

[0142] The second carrier 222 comprises a second carrier body 2221 and a connecting end 2222. The second carrier body 2221 has a receiving cavity 22211 therein, which can accommodate the focusing group 13 or the zoom group 12 therein. The connecting end comprises a second connecting end 22222 arranged on a first sidewall of the second carrier body 2221 and extending outwardly, and a first connecting end 22221 arranged on a second sidewall of the second carrier body 2221 and extending outwardly, the first and second sidewalls of the second carrier body 2221 being located on opposite sides in the direction of the optical axis or in the direction of adjustment. The first connecting end 22221 has a first connecting hole 222211 formed therein, so as to connect the guide device 24 with the second carrier 222 through the connecting hole. The second connecting end 22222 has a second connecting hole 222221 formed therein, so as to connect the guide device 24 with the second carrier 222 through the connecting hole, and further has a seating groove 222222 formed therein, for seating the second friction plate 2223.

[0143] In the shown example, the first connecting hole 222211 and the second connecting hole 222221 can be in the form of a through hole or a recess. Preferably, the first connecting hole 222211 is in the form of a recess, and the second connecting hole 222221 is in the form of a through hole. In some embodiments of the present application, the first connecting hole 222211 and the second connecting hole 222221 have a certain height difference, the first connecting hole 222211 being located at the upper end of the second carrier 222, and the second connecting hole 222221 being located at the lower end of the second carrier 222. Such arrangement can provide a certain clearance for other elements in the drive assembly 20, and make full use of the space in the drive assembly 20, so that the structure of the zoom camera module 100 is more compact. Of course, in other embodiments of the present application, the first connecting hole 222211 and the second connecting hole 222221 can also have the same height, i.e. both being arranged at the upper end or the lower end of the second carrier 222. The second friction plate 2223 is arranged in the seating groove 222222 of the second connecting end 22222.

[0144] The second friction plate 2223 and the second carrier 222 can be an integral structure or a separate structure. That is, the second friction plate 2223 can be integrally formed with the second carrier 222, or it can be embedded in the mounting groove 222222 of the second connecting end 22222 and thus fixed to the second carrier 222. The second friction plate 2223 has a cubic structure, meaning that the second driving element 212 makes frictional contact with one friction surface of the second friction plate 2223, thereby driving the second friction plate 2223 to move the second carrier 222. The length of the friction surface of the second friction plate 2223 along the optical axis or along the adjustment direction is greater than or equal to the travel distance of the second carrier 222.

[0145] In this application, the number of first connecting holes 222211 is at least one, and the number of second connecting holes 222221 is at least one. For example, two second connecting holes 222221 that are a certain distance apart from each other can be provided. The outer wall of the second connecting hole 222221 can form an inner wall of the mounting groove 222222.

[0146] Referring to the embodiment shown in the accompanying drawings, the mounting grooves within the first carrier 221 and the second carrier 222 are clamping track structures. The first friction plate 2213 and the second friction plate 2223 are respectively clamped within parallel tracks, thereby improving the parallelism between the friction plates and the driving carrier. This reduces shaking and jamming during travel, making the optical system of the variable-focus camera module 100 more stable and preventing tilting. Preferably, the first friction plate 2213 and the second friction plate 2223 are on the same horizontal plane. Preferably, the first friction plate 2213 and the second friction plate 2223 are ceramic sheets.

[0147] like Figure 11 , Figure 22a As shown in -b, the second friction plate 2223 is disposed between the second carrier 222 and the second driving element 212. One end of the second friction plate 2223 is in frictional contact with the second driving element 212, and the other end of the second friction plate 2223 extends inward and is fixedly connected to the second carrier body 2221 of the second carrier 222. The inward direction refers to the direction towards the optical axis or the geometric axis of the driving carrier.

[0148] In the present application, the guide device 24 and the position sensing element 28 are arranged in the free space or structural space formed between the second carrier body 2221 and the second driving element 212. Specifically, the second friction plate 2223 connects the second carrier 222 and the second driving element 212, and the second friction plate 2223 extends inward to provide a certain avoiding space for the guide device and the position sensing element in the driving assembly. In other words, one end of the second friction plate 2223 is fixedly connected with the second carrier body 2221 of the second carrier 222, and the other end is actionally connected with the second driving element 212, so that the second driving element 212 can drive the second friction plate 2223 to move along the adjustment direction. Therefore, the second friction plate 2223 arranged in the structural space between the second driving element 212 and the second carrier body 2221 of the second carrier 222 divides the structural space into a first structural space and a second structural space opposite to the first structural space. Here, the first structural space and the second structural space opposite to the first structural space are embodied as the upper space and the lower space of the second friction plate 2223 in the drawings, for example.

[0149] The position sensing element 28 for sensing the moving position of the second carrier 222 or the second friction plate 2223 can be arranged in the first structural space, and the guide device 24 for guiding the second carrier 222 to move along the adjustment direction, especially the guide rod of the guide device 24, can be arranged in the second structural space opposite to the first structural space. In other words, the guide device 24 and the position sensing element 28 can be arranged in the upper space and the lower space of the second friction plate 2223, respectively, so that the structure of the variable focal length camera module 100 is more compact.

[0150] In the driving assembly 20, the first carrier 221 and the second carrier 222 are arranged in sequence along the optical axis direction or adjustment direction, and the first friction plate 2213 of the first carrier 221 is arranged at the first side of the driving assembly 20, and the second friction plate 2223 of the second carrier 222 is arranged at the second side of the driving assembly 20, and the first side and the second side of the driving assembly 20 are located at the opposite sides along the optical axis direction or adjustment direction, respectively.

[0151] The first connecting end 22121 of the first carrier 221 and the second connecting end 22222 of the second carrier 222 are located on the first side of the driving assembly 20, and the second connecting end 22122 of the first carrier 221 and the first connecting end 22221 of the second carrier 222 are located on the second side of the driving assembly 20. The first side and the second side of the driving assembly 20 are respectively located on the opposite sides in the optical axis direction or the adjustment direction. The first connecting end 22121 of the first carrier 221 is located above or below the second friction plate 2223 of the second carrier 222, and the first connecting end 22221 of the second carrier 222 is located below or above the first friction plate 2213 of the first carrier 221. That is, the first connecting end 22121 of the first carrier 221 needs to avoid the position of the second friction plate 2223 of the second carrier 222, and the position of the first connecting end 22221 of the second carrier 222 needs to avoid the position of the first friction plate 2213 of the first carrier 221, so as to avoid interference with the movement of the friction plate, and also make the structure of the driving assembly 20 more compact.

[0152] In addition, in the present application, the first friction plate 2213 and the second friction plate 2223 are in a cubic structure, which has a friction surface arranged in the optical axis direction or the adjustment direction. The driving element is in contact with the friction surface to provide corresponding driving force for the first friction plate 2213 and the second friction plate 2223, so that the first friction plate 2213 and the second friction plate 2223 can move more stably.

[0153] In the present application, the lengths of the first friction plate 2213 and the second friction plate 2223 in the optical axis direction or the adjustment direction can be the same or different, that is, the lengths of the first friction plate 2213 and the second friction plate 2223 are determined according to the driving stroke of the corresponding driving element. When the driving stroke of the corresponding driving element is long, the lengths of the first friction plate 2213 and the second friction plate 2223 are longer; when the driving stroke of the corresponding driving element is short, the lengths of the first friction plate 2213 and the second friction plate 2223 can be shorter.

[0154] In some embodiments, the first friction plate 2213 fixedly connected with the first carrier body 2211 of the first carrier 221 extends in the adjustment direction away from the second carrier 222, and the second friction plate 2223 fixedly connected with the second carrier body 2221 of the second carrier 222 extends in the adjustment direction away from the first carrier 221. In other words, the first friction plate 2213 and the second friction plate 2223 extend in the optical axis direction or the adjustment direction respectively towards two opposite directions, that is, one extends towards the object side and the other extends towards the image side.

[0155] Here, the first driving element 211 and the first friction plate 2213 connected with the first driving element 211 are located at a first side of the driving assembly 20, and the second driving element 212 and the second friction plate 2223 connected with the second driving element 212 are located at a second side of the driving assembly 20, the first side and the second side are opposite to each other relative to the common axis of the first carrier 221 and the second carrier 222.

[0156] Specifically, as Figure 10 mentioned, the first friction plate 2213 and the second friction plate 2223 extend in opposite directions along the optical axis direction or adjustment direction, i.e., one extends towards the object side and the other extends towards the image side. In some embodiments of the present application, the first friction plate 2213 can extend towards the object side in a direction away from the second carrier 222, and the second friction plate 2223 can extend towards the image side in a direction away from the first carrier 221. Wherein, the object side is the side close to the light turning 40, and the image side is the side close to the photosensitive assembly 30.

[0157] In some embodiments, the first driving element 211 is arranged at a middle position of the driving assembly 20 along the adjustment direction, and the second driving element 212 is arranged at a middle position of the driving assembly 20 along the adjustment direction. Wherein, the first driving element 211 and the second driving element 212 can be arranged parallel to each other along the adjustment direction.

[0158] Specifically, the first friction plate 2213 and the second friction plate 2223 extend in different directions, which can make the first driving element 211 and the second driving element 212 arranged at the middle position of the driving assembly 20, and then the first friction plate 2213 and the second friction plate 2223 can be kept in the driving range of the first driving element 211 and the second driving element 212 respectively during the movement, i.e., the first driving element 211 and the first friction plate 2213 keep frictional contact during the driving process, and the second driving element 212 and the second friction plate 2223 keep frictional contact, without causing the first driving element 211 and the second driving element 212 to separate from the friction plate due to the first friction plate 2213 and the second friction plate 2223 exceeding the range of the movement stroke.

[0159] In some other embodiments, the guide device 24 can include a plurality of guide rods, especially two guide rods, i.e., a first guide rod 241 and a second guide rod 242.

[0160] Specifically, in combination Figures 8-9 with the above

[0161] As Figures 8-9As shown, the guide device 24 comprises a first guide rod 241 and a second guide rod 242. The first guide rod 241 and the second guide rod 242 are arranged for guiding the zoom lens group 10 along the optical axis direction with high precision, and the axes of the first guide rod 241 and the second guide rod 242 are parallel to the optical axis of the zoom lens group 10 or the adjustment direction.

[0162] The first guide rod 241 and the second guide rod 242 are arranged on the second side and the first side of the drive assembly 20 respectively, and are matched with the first drive element 211 and the second drive element 212 to realize the guiding function for the movement of the first carrier 221 and the second carrier 222.

[0163] To this end, the guide rods of the guide device 24 can be fixedly connected with the drive housing 26 at both ends. The two ends of the first guide rod 241 and the second guide rod 242 are fixed to the drive housing 26 respectively, so that the first guide rod 241 and the second guide rod 242 can be stably arranged in the drive assembly 20.

[0164] The first guide rod 241 and the second guide rod 242 are arranged along the optical axis of the zoom lens group 10 or the adjustment direction, and the first guide rod 241 and the second guide rod 242 are movably connected with the first carrier 221 and the second carrier 222 respectively, and the first guide rod 241 and the second guide rod 242 provide the guiding direction for the first carrier 221 and the second carrier 222.

[0165] In the embodiment shown, the first guide rod 241 passes through the second connecting hole 221221 of the second connecting end 22122 of the first carrier 221 and the first connecting hole 222211 of the first connecting end 22221 of the second carrier 222, and the second guide rod 242 passes through the first connecting hole 222211 of the first connecting end 22121 of the first carrier 221 and the second connecting hole 222221 of the second connecting end 22222 of the second carrier 222, so that the first carrier 221 and the second carrier 222 can be separately moved along the first guide rod 241 and the second guide rod 242 of the guide device 24 under the driving of the first drive element 211 and the second drive element 212, wherein the first guide rod 241 and the second guide rod 242 are arranged parallel to each other along the adjustment direction.

[0166] Further, the first guide rod 241 can be movably connected with the first carrier 221 through the second connecting hole 221221 of the second connecting end 22122 of the first carrier 221, and movably connected with the second carrier 222 through the first connecting hole 222211 of the first connecting end 22221 of the second carrier 222. Here, the second connecting hole 221221 of the second connecting end 22122 of the first carrier 221 and the first connecting hole 222211 of the first connecting end 22221 of the second carrier 222 are coaxial with each other.

[0167] Similarly, the second guide rod 242 can be movably connected with the first carrier 221 through the first connecting hole 222211 of the first connecting end 22121 of the first carrier 221, and movably connected with the second carrier 222 through the second connecting hole 222221 of the second connecting end 22222 of the second carrier 222. Here, the first connecting hole 222211 of the first connecting end 22121 of the first carrier 221 and the second connecting hole 222221 of the second connecting end 22222 of the second carrier 222 are coaxial with each other.

[0168] When the first driving element 211 drives the first carrier 221 to move along the optical axis direction or adjustment direction, the first guide rod 241 can be used as a main guide rod to guide the movement of the first carrier 221, and the second guide rod 242 can be used as a secondary guide rod to prevent the first carrier 221 from rotating.

[0169] When the second driving element 212 drives the second carrier 222 to move along the optical axis direction or adjustment direction, the second guide rod 242 can be used as a main guide rod to guide the movement of the second carrier 222, and the first guide rod 241 can be used as a secondary guide rod to prevent the second carrier 222 from rotating.

[0170] That is, the first guide rod 241 and the second guide rod 242 can both be used as a main guide rod and a secondary guide rod, and they can both guide the direction and prevent the driving carrier from rotating.

[0171] The first guide rod 241 and the second guide rod 242 can have a certain height difference, that is, the first guide rod 241 can be located at the upper end of the second side of the first carrier 221 and the second carrier 222, and the second guide rod 242 can be located at the lower end of the first side of the first carrier 221 and the second carrier 222, wherein the first side and the second side of the first carrier 221 and the second carrier 222 are located on opposite sides relative to the optical axis. Thus, a certain space is provided for other elements in the driving assembly 20, so that the structure of the variable focal camera module 100 is more compact.

[0172] Further, the first guide rod 241 is arranged above the first friction plate 2213, and the second guide rod 242 is arranged below the second friction plate 2223, so as to reserve a certain movement space for the first friction plate 2213 and the second friction plate 2223, avoiding interference with the movement of the first carrier 221 and the second carrier 222. Of course, in other embodiments of the present application, the first guide rod 241 can be arranged below the first friction plate 2213, and the second guide rod 242 can be arranged above the second friction plate 2223.

[0173] like Figures 10-17 As shown, the driving element 21 includes at least two driving elements: a zoom driving element 211 and a focus driving element 212, wherein the at least two driving elements 21 are implemented as piezoelectric actuators. Here, the zoom driving element 211 is also referred to as the first driving element, and the focus driving element 212 is also referred to as the second driving element. The corresponding driving elements may also perform other functions, and are not limited to the focusing or zooming functions illustrated herein.

[0174] In the accompanying drawings, the zoom drive element 211 and the focus drive element 212 are respectively disposed on the side of the drive assembly 20 to avoid increasing the height of the zoom camera module 100. Furthermore, the zoom drive element 211 and the focus drive element 212 are respectively disposed on a first side and a second side opposite to the drive assembly 20; that is, the zoom drive element 211 is disposed on the first side of the drive assembly 20, and the focus drive element 212 is disposed on the second side of the drive assembly 20 opposite to it.

[0175] When the zoom group 12 is disposed in the first carrier 221, the zoom drive element 211 is used to drive the first carrier 221 to move, thereby driving the zoom group 12 to move to achieve optical zoom function.

[0176] When the focus group 13 is disposed in the second carrier 222, the focus driving element 212 is used to drive the second carrier 222 to move, thereby driving the focus group 13 to move to achieve optical focusing function.

[0177] Of course, in other embodiments of this application, if the placement positions of the zoom group 12 and the focus group 13 change, the positions of the zoom drive element 211 and the focus drive element 212 also change. In this application, the zoom drive element 211 and the focus drive element 212 are symmetrically arranged. Preferably, the zoom drive element 211 and the focus drive element 212 are symmetrically arranged along the optical axis or along the adjustment direction. Furthermore, the zoom drive element 211 and the focus drive element 212 remain parallel to each other with respect to the optical axis. This arrangement of separate sides not only avoids an increase in the size of one side of the zoom camera module 100, but also prevents interference between the zoom drive element 211 and the focus drive element 212 during the respective driving of the first carrier 221 and the second carrier 222.

[0178] Further, the arrangement of the present application can also make the internal space of the variable-focus camera module 100 fully utilized, so as to facilitate the light-weighting and thinning of the variable-focus camera module 100. Moreover, the first carrier 221 and the second carrier 222 can be provided with mutual parallel driving force, so that the first carrier 221 and the second carrier 222 will not be inclined during movement. In the present application, the zoom driving element 211 and the focus driving element 212 are arranged at the middle position of the driving assembly 20 along the optical axis direction or adjustment direction, so that the first friction plate 2213 and the second friction plate 2223 can be kept within the driving range of the driving element 21 during movement, i.e. the first friction plate 2213 and the second friction plate 2223 are kept in friction contact with the corresponding driving element during driving, and the first friction plate 2213 and the second friction plate 2223 will not be separated from the driving element due to exceeding the range of the movement stroke.

[0179] In some embodiments, the driving element 21 can be configured as a piezoelectric actuator, including a piezoelectric plate 213 and a friction driving part 214 fixed on the piezoelectric plate, wherein the friction driving part 214 is in action connection with the friction plate, so as to be able to drive the friction plate to move along the adjustment direction, i.e. along the optical axis direction. Specifically, the friction driving part 214 of the first driving element 211 can be in action connection with the first friction plate 2213, so as to be able to drive the first friction plate 2213 to move along the adjustment direction, and the friction driving part 214 of the second driving element 212 can be in action connection with the second friction plate 2223, so as to be able to drive the second friction plate 2223 to move along the adjustment direction.

[0180] Figure 12 a-c are schematic diagrams of the action connection between the piezoelectric driver and the friction plate according to some embodiments of the present application, wherein in the initial position, Figure 12 a shows that the friction driving part 214 is in action connection with the friction plate 2213(2223) at the middle position of the corresponding friction plate 2213(2223), Figure 12 b shows that the friction driving part 214 is in action connection with the friction plate 2213(2223) at one end of the corresponding friction plate 2213(2223), Figure 12 c shows that the friction driving part 214 is in action connection with the friction plate 2213(2223) at the opposite end.

[0181] As Figure 12 a-c to Figure 17As shown, the driving element 21 comprises at least one row wave piezoelectric actuator, which has nanometer step precision and can meet the most extreme requirements of optical systems. As an example, the at least one piezoelectric actuator comprises a piezoelectric ceramic plate 213 and a friction driving part 214 fixed to the piezoelectric ceramic plate 213. The piezoelectric ceramic plate 213 is composed of very small piezoelectric ceramics. After a power excitation is provided to the piezoelectric ceramic plate 213, the piezoelectric ceramic plate 213 is adapted to deform through the inverse piezoelectric effect of the piezoelectric ceramic plate 213, so that the friction driving part 214 on the piezoelectric ceramic plate 213 moves accordingly.

[0182] Further, the zoom driving element 211 is arranged on the first friction plate 2213, and the focus driving element 212 is arranged on the second friction plate 2223, i.e. the zoom driving element 211 and the focus driving element 212 separately drive the first friction plate 2213 and the second friction plate 2223 to move, respectively, and in turn separately drive the corresponding first carrier 221 and the second carrier 222 to move. In the present application, the length of the friction plate in the optical axis direction or in the adjustment direction is greater than or equal to the driving stroke of the driving element 21. Hereinafter, the zoom driving element 211 is referred to as the first driving element 211, and the focus driving element 212 is referred to as the second driving element 212.

[0183] Generally, the friction driving part 214 acts on and is in frictional contact with the corresponding friction plate. Of course, preferably, in the initial state, the friction driving part 214 is located at the middle position of the corresponding friction plate, and the friction plate can move bidirectionally along the optical axis direction or the adjustment direction under the driving of the driving element 21, i.e. move towards the object side or the image side, i.e. the friction driving part 214 can move towards two directions.

[0184] Specifically, in the initial position, the friction driving part 214 of the first driving element 211 can be connected with the first friction plate 2213 at the middle position of the first friction plate 2213 in the adjustment direction, and / or the friction driving part 214 of the second driving element 212 can be connected with the second friction plate 2223 at the middle position of the second friction plate 2223 in the adjustment direction.

[0185] Of course, generally, in the initial state, the friction driving part 214 can also be located at one end relative to the corresponding friction plate, so that this friction plate can move along the optical axis direction or the adjustment direction towards the other opposite end under the driving of the friction driving part 214 of the driving element 21.

[0186] Specifically, in the initial position, the friction drive part 214 of the first drive element 211 is operatively connected to the first friction plate 2213 at one end of the first friction plate 2213 along the adjustment direction, and / or the friction drive part 214 of the second drive element 212 is operatively connected to the second friction plate 2223 at one end of the second friction plate 2223 along the adjustment direction.

[0187] In other words, in the initial state, the friction drive unit 214 can also be located at the image-side end / object-side end of the corresponding friction unit, and the corresponding friction plate can move towards the object-side / image-side along the optical axis direction or the adjustment direction under the drive of the drive element 21. In this application, the image-side is the side facing the photosensitive component 30, and the object-side is the side away from the photosensitive component 30.

[0188] The first driving element 211 and the second driving element 212 can be the same type of piezoelectric actuator or different types of piezoelectric actuators. In this application, the first driving element 211 and the second driving element 212 are the same type of piezoelectric actuator as an example for introduction.

[0189] like Figures 13-17 as well as Figure 22a In the embodiments shown, a driving element is provided on one side of the friction plate, and a friction mechanism 215 is provided on the opposite side of the friction plate, so that the friction plate is clamped between the driving element and the friction mechanism 215 under the action of the pre-pressure device, so that the friction plate can move along the adjustment direction under the driving action of the driving element.

[0190] Specifically, Figure 13 This is a schematic side view of a first carrier 221 according to some embodiments of this application, including an assembled first friction plate 2213, a first driving element 211, and a first friction mechanism 2151. The first driving element 211, also referred to as a zoom driving element 211, includes a piezoelectric plate 213 and a friction driving part 214 fixed on the piezoelectric plate. The friction driving part 214 of the first driving element 211 is in frictional contact with the first friction plate 2213. After the first driving element 211 is powered, the piezoelectric ceramic plate 213 of the first driving element 211 undergoes a traveling wave-like surface change, thereby driving the friction driving part 214 of the first driving element 211 to produce a unidirectional oscillating reciprocating motion along the optical axis or along the adjustment direction. Due to the frictional contact between the friction driving part 214 of the first driving element 211 and the first friction plate 2213, the first friction plate 2213 is moved along the optical axis or along the adjustment direction.

[0191] Specifically, when the first driving element 211 is excited, the friction driving part 214 of the first driving element 211 is in frictional contact with the first friction plate 2213, the piezoelectric ceramic plate 213 of the first driving element 211 generates a surface change in a traveling wave state, and the friction driving part 214 of the first driving element 211 is driven to swing in the optical axis direction or adjustment direction, thereby driving the first friction plate 2213 to move in the optical axis direction or adjustment direction.

[0192] When a movement cycle is completed, the piezoelectric ceramic plate 213 of the first driving element 211 is lifted to separate the friction driving part 214 of the first driving element 211 from the first friction plate 2213, and the friction driving part 214 of the first driving element 211 is repositioned and swings again in the optical axis direction or adjustment direction under the driving of the piezoelectric ceramic plate 213, thereby driving the first friction plate 2213 to continue moving in the optical axis direction or adjustment direction. Figure 16 a-d show the relevant piezoelectric driving principle schematic diagram.

[0193] In the present application, the first driving element 211 can be arranged on the upper or lower part of the first friction plate 2213, that is, the friction driving part 214 of the first driving element 211 can be in frictional contact with the upper friction surface of the first friction plate 2213, or can be in frictional contact with the lower friction surface of the first friction plate 2213. Therefore, the first driving element 211 can be used to provide a driving force for moving the first carrier 221 in the adjustment direction. The first friction plate 2213 can be arranged between the carrier body 2211 of the first carrier 221 and the first driving element 211, wherein one end of the first friction plate 2213 is fixedly connected with the carrier body 2211 of the first carrier 221, and the other end is actionally connected with the first driving element 211, so that the first driving element 211 can drive the first friction plate 2213 to move in the adjustment direction.

[0194] The first driving element 211 and the first friction plate 2213 are arranged in the first pre-pressure device 2301, and the first driving element 211 and the first friction plate 2213 are pressed together by the clamping action of the first pre-pressure device 2301. That is, the first pre-pressure device 2301 provides a pre-pressure along the friction surface of the first friction plate 2213, and the first pre-pressure device 2301 can maintain the friction contact between the first driving element 211 and the first friction plate 2213. And due to the existence of the pre-pressure, the friction driving part 214 of the first driving element 211 can always be kept on the friction surface of the first friction plate 2213, and the driving force generated by the first driving element 211 on the first friction plate 2213 is the same. And, in this application, the first friction plate 2213 is driven to move by the friction force on the friction surface, which can make the movement of the first friction plate 2213 more stable.

[0195] Taking the case that the first driving element 211 is arranged on the upper part of the first friction plate 2213, the piezoelectric ceramic plate 213 of the first driving element 211 can be fixed with the first pre-pressure device 2301, and the friction driving part 214 of the first driving element 211 faces the first friction plate 2213 and is in friction contact with the upper friction surface of the first friction plate 2213.

[0196] In some embodiments, in order to reduce the friction between the first friction plate 2213 and the first pre-pressure device 2301, a first friction mechanism 2151 can be arranged between the first pre-pressure device 2301 and the first friction plate 2213, so that the first friction plate 2213 and the first pre-pressure device 2301 are movably connected through the first friction mechanism 2151, and the first pre-pressure device 2301 presses the first friction mechanism 2151 on the first friction plate 2213. Specifically, the first driving element 211 is arranged on one side of the first friction plate 2213, and the first friction mechanism 2151 is arranged on the opposite side of the first friction plate 2213, so that the first friction plate 2213 is clamped between the first driving element 211 and the first friction mechanism 2151 under the action of the first pre-pressure device 2301, and the first friction plate 2213 can move along the adjustment direction under the driving action of the first driving element 211. Thus, the point friction is used instead of the surface friction to reduce the friction between the first friction plate 2213 and the first pre-pressure device 2301.

[0197] In some embodiments of the present application, the first friction mechanism 2151 comprises a groove or a track configured on the first pre-pressure device 2301 and / or the first friction plate 2213, and a ball or a slider arranged in the groove or the track. By arranging a groove or a track in the direction of the optical axis or the adjustment direction between the first pre-pressure device 2301 and the friction surface of the first friction plate 2213, and arranging a ball in the groove or the track, the first friction plate 2213 can be moved in the direction of the optical axis or the adjustment direction under the clamping of the ball. The first drive element 211 and the first friction mechanism 2151 can be arranged relatively along the first friction plate 2213.

[0198] For the case of including the first carrier 221 and the second carrier 222, the structures and features described above in connection with the first carrier 221 and its related parts also apply to the second carrier 222 and its related parts, as described below.

[0199] With Figure 13 corresponding, Figure 14 is a schematic side view of the second carrier 222 according to some embodiments of the present application, including the assembled second friction plate 2223, the second drive element 212, and the second friction mechanism 2152. The second drive element 212 can also be referred to as a focus drive element 212, including a piezoelectric plate 213 and a friction driving portion 214 fixed on the piezoelectric plate. The friction driving portion 214 of the second drive element 212 is in frictional contact with the second friction plate 2223. After the second drive element 212 is provided with power excitation, the piezoelectric ceramic plate 213 of the second drive element 212 generates a surface shape change in a traveling wave state, thereby driving the friction driving portion 214 of the second drive element 212 to generate a one-way pendulum reciprocating motion in the direction of the optical axis or the adjustment direction. Due to the frictional contact between the friction driving portion 214 of the second drive element 212 and the second friction plate 2223, the second friction plate 2223 is further driven to move in the direction of the optical axis or the adjustment direction.

[0200] Specifically, after the second drive element 212 is excited, the friction driving portion 214 of the second drive element 212 is in frictional contact with the second friction plate 2223, the piezoelectric ceramic plate 213 of the second drive element 212 generates a surface shape change in a traveling wave state, and the friction driving portion 214 of the second drive element 212 is driven to swing in the direction of the optical axis or the adjustment direction, thereby driving the second friction plate 2223 to move in the direction of the optical axis or the adjustment direction.

[0201] When a movement cycle is completed, the piezoelectric ceramic plate 213 of the second driving element 212 is lifted to separate the friction driving part 214 of the second driving element 212 from the second friction plate 2223, and then the friction driving part 214 of the second driving element 212 is brought into frictional contact with the second friction plate 2223 again. The friction driving part 214 of the second driving element 212 is repositioned under the drive of the piezoelectric ceramic plate 213 and again performs a deflection movement along the optical axis direction or adjustment direction, thereby driving the second friction plate 2223 to continue moving along the optical axis direction or adjustment direction. The working process is the same as the description of the first driving element 211 above.

[0202] In the present application, the second driving element 212 can be arranged above or below the second friction plate 2223, that is, the friction driving part 214 of the second driving element 212 can be in frictional contact with the upper friction surface of the second friction plate 2223 or the lower friction surface of the second friction plate 2223. Therefore, the second driving element 212 can be used to provide a driving force for moving the second carrier 222 along the adjustment direction. The second friction plate 2223 can be arranged between the carrier body 2221 of the second carrier 222 and the second driving element 212, wherein one end of the second friction plate 2223 is fixedly connected to the carrier body 2221 of the second carrier 222, and the other end is in action connection with the second driving element 212, so that the second driving element 212 can drive the second friction plate 2223 to move along the adjustment direction.

[0203] The second driving element 212 and the second friction plate 2223 are arranged in the second pre-pressure device 2302, and the clamping action of the second pre-pressure device 2302 causes the second driving element 212 and the second friction plate 2223 to be pressed together. That is, the second pre-pressure device 2302 provides a pre-pressure along the friction surface of the second friction plate 2223, and the second pre-pressure device 2302 can maintain the frictional contact between the second driving element 212 and the second friction plate 2223. And because of the existence of the pre-pressure, the friction driving part 214 of the second driving element 212 can always be kept on the friction surface of the second friction plate 2223, thereby making the driving force generated by the second driving element 212 on the second friction plate 2223 uniform. And, in the present application, the movement of the second friction plate 2223 is driven by the friction force on the friction surface, which can make the movement of the second friction plate 2223 more stable.

[0204] For example, the piezoelectric ceramic plate 213 of the second driving element 212 is fixed with the second pre-pressure device 2302, and the friction driving part 214 of the second driving element 212 faces the second friction plate 2223 and keeps friction contact with the upper friction surface of the second friction plate 2223.

[0205] In some embodiments, in order to reduce the friction between the second friction plate 2223 and the second pre-pressure device 2302, a second friction mechanism 2152 can be arranged between the second pre-pressure device 2302 and the second friction plate 2223, so that the second friction plate 2223 is movably connected with the second pre-pressure device 2302 through the second friction mechanism 2152, and the second pre-pressure device 2302 presses the second friction mechanism 2152 on the second friction plate 2223. Specifically, the second driving element 212 is arranged on one side of the second friction plate 2223, and the second friction mechanism 2152 is arranged on the other side of the second friction plate 2223, so that the second friction plate 2223 is clamped between the second driving element 212 and the second friction mechanism 2152 under the action of the second pre-pressure device 2302, and the second friction plate 2223 can move along the adjustment direction under the driving action of the second driving element 212. Thus, the friction between the second friction plate 2223 and the second pre-pressure device 2302 is reduced by point friction instead of surface friction.

[0206] In some embodiments of the present application, the second friction mechanism 2152 includes a groove or a roller arranged on the second pre-pressure device 2302 and / or the second friction plate 2223, and a ball or a sliding block arranged in the groove or the roller. By arranging a groove or a track along the optical axis direction or the adjustment direction between the second pre-pressure device 2302 and the friction surface of the second friction plate 2223, and arranging a ball in the groove or the track, the second friction plate 2223 can move along the optical axis direction or the adjustment direction under the clamping of the friction driving part 214 and the ball. The second driving element 212 and the second friction mechanism 2152 can be arranged oppositely along the second friction plate 2223.

[0207] Here, the first friction mechanism 2151 and the second friction mechanism 2152 can be configured identically, i.e., each of them includes a groove or a roller arranged on the corresponding pre-pressure device and / or friction plate, and a ball or a sliding block arranged in the groove or the roller.

[0208] Figure 22a is an axial view of a driving assembly according to some embodiments of the present application, in which each friction plate is respectively provided with a driving element and a friction mechanism. As Figure 22aAs shown, the first driving element 211 and the first friction mechanism 2151 are disposed on the same side of the driving assembly 20, wherein the first driving element 211 and the first friction mechanism 2151 are disposed opposite to each other along the first friction plate 2213, and both the first driving element 211 and the first friction mechanism 2151 are in frictional contact with the first friction plate 2213.

[0209] The second driving element 212 and the second friction mechanism 2152 are disposed on the same side of the driving assembly 20, wherein the second driving element 212 and the second friction mechanism 2152 are disposed opposite to each other along the second friction plate 2223, and both the second driving element 212 and the second friction mechanism 2152 are in frictional contact with the second friction plate 2223.

[0210] The first driving element 211 and the first friction mechanism 2151 are disposed on the first side of the driving assembly 20, and the second driving element 212 and the second friction mechanism 2152 are disposed on the second side of the driving assembly 20. The first side and the second side of the driving assembly 20 are opposite to each other along the optical axis or along the adjustment direction.

[0211] The first driving element 211 and the first friction mechanism 2151 as a whole are centrally symmetrical with the second driving element 212 and the second friction mechanism 2152 as a whole when viewed along the optical axis or the adjustment direction. The first driving element 211 and the second driving element 212 are centrally symmetrical when viewed along the optical axis or the adjustment direction, and the first friction mechanism 2151 and the second friction mechanism 2152 are centrally symmetrical when viewed along the optical axis or the adjustment direction.

[0212] exist Figure 22a From the -b perspective, the optical axis direction, or adjustment direction, is represented by a point at the geometric center of the drive carrier, which is also the point of central symmetry mentioned above. Furthermore, the first carrier 221 and the second carrier 222 are arranged sequentially on the same axis along the adjustment direction and can move independently of each other along the adjustment direction. This axis coincides with the optical axis and is parallel to the adjustment direction, therefore it is also represented as a point in the view. The first drive element 211 and the second drive element 212 are centrally symmetrical with respect to this point. In other words, the observation along the optical axis direction, or the adjustment direction, refers to the observation along the adjustment direction of the drive carrier. Generally, the first carrier 221 and the second carrier 222 are arranged sequentially on the same axis along the adjustment direction, and this common axis is the same as the optical axis or the adjustment direction of the drive carrier. Observing along the adjustment direction of the drive carrier, the adjustment direction is represented as a point, i.e., the point of central symmetry. This description of central symmetry also applies to other parts of the specification describing the centrally symmetrical arrangement of components.

[0213] Likewise, the first friction mechanism 2151 and the second friction mechanism 2152 are also centrosymmetric when viewed along the axis. Optionally, the first friction mechanism 2151 and the second friction mechanism 2152 are configured as standard components of the same structure.

[0214] In the present application, the first driving element 211 and the second driving element 212 are arranged in a centrosymmetric manner along the optical axis direction or in other words along the adjustment direction, so that the first driving element 211 and the second driving element 212 can have the same structure, and thus the first driving element 211 and the second driving element 212 can be configured as standard components. This arrangement makes the structural design of the variable focal camera module simpler, which is conducive to simplifying the structure of the variable focal camera module. That is, the first driving element 211 and the second driving element 212 can be configured as standard components of the same structure.

[0215] In particular, the first structure unit formed by the first driving element 211 and the first friction mechanism 2151 and the second structure unit formed by the second driving element 212 and the second friction mechanism 2152 can be configured as standard structure units of the same structure, and the first structure unit and the second structure unit can also be arranged in a centrosymmetric manner when viewed along the axis. Figure 22a As shown, the first driving element 211 can be arranged at the lower part of the first friction plate 2213, and the first friction mechanism 2151 is arranged at the upper part of the first friction plate 2213 opposite to the first driving element 211; the second driving element 212 can be arranged at the upper part of the second friction plate 2223, and the second friction mechanism 2152 is arranged at the lower part of the second friction plate 2223 opposite to the second driving element 212. Of course, the positions of the first driving element 211 and the first friction mechanism 2151 can be exchanged with each other, and likewise the positions of the second driving element 212 and the second friction mechanism 2152 can also be exchanged with each other.

[0216] Figure 22b is an axial view of a driving assembly 20 according to another embodiment of the present application, in which one driving element is arranged on each of the two opposite sides of each friction plate, so that the friction plate is clamped between the two driving elements and can move along the adjustment direction under the cooperative driving action of the two driving elements.

[0217] In particular, as shown in Figure 15 and Figure 22bAs shown, the first driving element comprises a first upper driving element 2111 and a first lower driving element 2112, wherein the first upper driving element 2111 and the first lower driving element 2112 are located on the same side of the driving assembly 20, and the first upper driving element 2111 and the first lower driving element 2112 are oppositely arranged on both sides of the first friction plate 2213. The first upper driving element 2111 and the first lower driving element 2112 can be identically configured as piezoelectric actuators.

[0218] It should be pointed out here that in the present application, such expressions as "upper" and "lower" are only used to distinguish similar parts by name, and do not necessarily represent the actual orientation of the parts, but only express the relative positional relationship, i.e. the names with "upper" and "lower" prefixes represent the parts relative to each other based on the friction plate. For example, the first upper driving element 2111 and the first lower driving element 2112 are opposite to each other based on the first friction plate 2213, i.e. arranged on opposite sides of the first friction plate 2213.

[0219] The first upper driving element 2111 comprises a first piezoelectric ceramic plate 21111 and a first friction driving part 21112, and the first lower driving element 2112 comprises a second piezoelectric ceramic plate 21121 and a second friction driving part 21122. The first friction plate 2213 is clamped by the first friction driving part 21112 of the first upper driving element 2111 and the second friction driving part 21122 of the first lower driving element 2112, and the first friction plate 2213 is driven on both sides by the first friction driving part 21112 and the second friction driving part 21122 to realize the movement of the first carrier 221 along the optical axis direction or adjustment direction.

[0220] The first upper driving element 2111 and the first lower driving element 2112 are arranged in the first pre-pressure device 2301, and the clamping action of the first pre-pressure device 2301 causes the first upper driving element 2111, the first lower driving element 2112 and the first friction plate 2213 to be pressed together. That is, the first pre-pressure device 2301 provides a pre-pressure along the friction surface perpendicular to the first friction plate 2213, and can maintain the friction contact of the first upper driving element 2111, the first lower driving element 2112 and the first friction plate 2213 at the same time. The line connecting the first friction driving part 21112 of the first upper driving element 2111 and the second friction driving part 21122 of the first lower driving element 2112 is perpendicular to the friction surface of the first friction plate 2213. This arrangement can enable the first upper driving element 2111 and the first lower driving element 2112 to simultaneously drive the first friction plate 2213 to move, providing greater thrust for the movement of the first carrier 221, and thus generating a greater movement stroke, with a maximum stroke of 7mm.

[0221] In addition, the first friction plate 2213 is clamped by the first upper driving element 2111 and the first lower driving element 2112, so that the first carrier 221 can be kept stable in the driving assembly 20, and the risk of shaking is avoided. The clamping force generated by the first upper driving element 2111 and the first lower driving element 2112 is perpendicular to the driving force.

[0222] Specifically, the first piezoelectric ceramic plate 21111 of the first upper driving element 2111 is fixedly connected with the first pre-pressure device 2301, and the first friction driving part 21112 of the first upper driving element 2111 is in frictional contact with the upper (lower) friction surface of the first friction plate 2213 under the action of the pre-pressure; the second piezoelectric ceramic plate 21121 of the first lower driving element 2112 is fixedly connected with the first pre-pressure device 2301, and the second friction driving part 21122 of the first lower driving element 2112 is in frictional contact with the lower (upper) friction surface of the first friction plate 2213 under the action of the pre-pressure. Therefore, the first friction plate 2213 can move along the optical axis direction or adjustment direction under the joint action of the first friction driving part 21112 and the second friction driving part 21122.

[0223] Since the driving force of the first upper driving element 2111 and the first lower driving element 2112 is transmitted to the first friction plate 2213 through friction, the first friction plate 2213 is driven to move, and this process does not affect the piezoelectric actuator, so the service life of the piezoelectric actuator can be prolonged.

[0224] The first upper driving element 2111 and the first lower driving element 2112 can be controlled respectively, so that the adjustment during the driving process is simpler. After the same power excitation is provided for the first upper driving element 2111 and the first lower driving element 2112, the first piezoelectric ceramic plate 21111 of the first upper driving element 2111 and the second piezoelectric ceramic plate 21121 of the first lower driving element 2112 generate a face type change in a symmetrical traveling wave state with the friction surface, thereby driving the first friction driving part 21112 of the first upper driving element 2111 and the second friction driving part 21122 of the first lower driving element 2112 to generate synchronous one-way deflection reciprocating motion.

[0225] Specifically, when the first upper driving element 2111 and the first lower driving element 2112 are excited, the first friction driving part 21112 of the first upper driving element 2111 and the second friction driving part 21122 of the first lower driving element 2112 are in frictional contact with the first friction plate 2213, the first piezoelectric ceramic plate 21111 of the first upper driving element 2111 and the second piezoelectric ceramic plate 21121 of the first lower driving element 2112 generate the same surface change in the traveling wave state, and the first friction driving part 21112 of the first upper driving element 2111 and the second friction driving part 21122 of the first lower driving element 2112 are driven to swing in the optical axis direction or the adjustment direction, thereby driving the first friction plate 2213 of the first carrier 221 to move in the optical axis direction or the adjustment direction.

[0226] When a movement cycle is completed, the first piezoelectric ceramic plate 21111 of the first upper driving element 2111 and the second piezoelectric ceramic plate 21121 of the first lower driving element 2112 are lifted, the first friction driving part 21112 of the first upper driving element 2111 and the second friction driving part 21122 of the first lower driving element 2112 are separated from the first friction plate 2213, and then the first friction driving part 21112 of the first upper driving element 2111 and the second friction driving part 21122 of the first lower driving element 2112 are repositioned and driven to swing again in the optical axis direction or the adjustment direction, thereby driving the first friction plate 2213 to continue moving in the optical axis direction or the adjustment direction.

[0227] Since the first upper driving element 2111 and the first lower driving element 2112 have the same vibration frequency, the probability of interference is reduced. After the voltage is stopped, the first upper driving element 2111 and the first lower driving element 2112 can form a self-locking structure to keep the first friction plate 2213 and the first carrier 221 in the current position, so that the optical system of the variable focal length camera module 100 remains unchanged, thereby avoiding the influence on the imaging effect. In addition, the self-locking device in the variable focal length camera module 100 is omitted, and the size of the variable focal length camera module 100 is relatively reduced. Since the first upper driving element 2111 and the first lower driving element 2112 form a self-locking structure, the piezoelectric actuator does not need to be kept activated to maintain its position.

[0228] As Figure 17 and Figure 22bAs shown, the second driving element 212 includes a second upper driving element 2121 and a second lower driving element 2122, wherein the second upper driving element 2121 and the second lower driving element 2122 are located at the same side of the driving assembly 20, and the second upper driving element 2121 and the second lower driving element 2122 are symmetrically arranged relative to the second friction plate 2223.

[0229] The second upper driving element 2121 includes a third piezoelectric ceramic plate 21212 and a third friction driving part 21211, and the second lower driving element 2122 includes a fourth piezoelectric ceramic plate 21222 and a fourth friction driving part 21221. The second friction plate 2223 is clamped by the third friction driving part 21211 of the second upper driving element 2121 and the fourth friction driving part 21221 of the second lower driving element 2122, and is driven by the third friction driving part 21211 of the second upper driving element 2121 and the fourth friction driving part 21221 of the second lower driving element 2122 to move the second carrier 222 along the optical axis direction or adjustment direction.

[0230] The second upper driving element 2121 and the second lower driving element 2122 are arranged in the second pre-pressure device 2302, and the second upper driving element 2121 and the second lower driving element 2122 are pressed together with the second friction plate 2223 by the clamping action of the second pre-pressure device 2302. That is, the second pre-pressure device 2302 provides a pre-pressure along the friction surface perpendicular to the second friction plate 2223, and the second pre-pressure device 2302 can keep the second upper driving element 2121 and the second lower driving element 2122 in friction contact with the second friction plate 2223 at the same time.

[0231] The line connecting the third friction driving part 21211 of the second upper driving element 2121 and the fourth friction driving part 21221 of the second lower driving element 2122 is perpendicular to the friction surface of the second friction plate 2223. This arrangement can enable the second upper driving element 2121 and the second lower driving element 2122 to drive the second friction plate 2223 to move at the same time, providing greater thrust for the movement of the second carrier 222, and thus generating greater movement stroke, with a maximum stroke of 7mm.

[0232] In addition, the structure of clamping the second friction plate 2223 by the second upper driving element 2121 and the second lower driving element 2122 can keep the second carrier 222 stable in the driving assembly 20, avoiding the risk of shaking. The direction of the clamping force generated by the second upper driving element 2121 and the second lower driving element 2122 is perpendicular to the direction of the driving force.

[0233] Specifically, the third piezoelectric ceramic plate 21212 of the second upper driving element 2121 is fixedly connected with the second pre-pressure device 2302, and the third friction driving part 21211 of the second upper driving element 2121 is in frictional contact with the upper (lower) friction surface of the second friction plate 2223 under the action of the pre-pressure; the fourth piezoelectric ceramic plate 21222 of the second lower driving element 2122 is fixedly connected with the second pre-pressure device 2302, and the fourth friction driving part 21221 of the second lower driving element 2122 is in frictional contact with the lower (upper) friction surface of the second friction plate 2223 under the action of the pre-pressure, and the second friction plate 2223 can move along the optical axis direction or adjustment direction under the synergistic action of the third friction driving part 21211 of the second upper driving element 2121 and the fourth friction driving part 21221 of the second lower driving element 2122.

[0234] Since the driving force of the second upper driving element 2121 and the second lower driving element 2122 is transmitted to the second friction plate 2223 through friction, the second friction plate 2223 is driven to move, and this process does not affect the piezoelectric actuator, so the service life of the piezoelectric actuator can be prolonged.

[0235] The second upper driving element 2121 and the second lower driving element 2122 can be controlled respectively, so that the adjustment in the driving process is simpler. After the same power excitation is provided for the second upper driving element 2121 and the second lower driving element 2122, the third piezoelectric ceramic plate 21212 of the second upper driving element 2121 and the fourth piezoelectric ceramic plate 21222 of the second lower driving element 2122 generate a face type change in a traveling wave state symmetrical to the friction surface, thereby driving the third friction driving part 21211 of the second upper driving element 2121 and the fourth friction driving part 21221 of the second lower driving element 2122 to generate synchronous one-way deflection reciprocating motion.

[0236] Since the vibration frequency of the second upper driving element 2121 and the second lower driving element 2122 is the same, the probability of interference is reduced. After stopping applying voltage, the second upper driving element 2121 and the second lower driving element 2122 can form a self-locking structure to keep the second friction plate 2223 and the second carrier 222 at the current position, and the position will not change due to external shaking, thereby keeping the optical system of the variable focal length camera module 100 unchanged, thereby avoiding affecting the imaging effect. Also, the self-locking device is not added in the variable focal length camera module 100, and the size of the variable focal length camera module 100 is relatively reduced. Since the second upper driving element 2121 and the second lower driving element 2122 form a self-locking structure, the piezoelectric actuator does not need to be kept activated to keep its position.

[0237] AsFigure 22a As shown in -b, the first driving element 211 and the second driving element 212 are respectively disposed on the opposite first side and the second side of the zoom lens group 10, and the first side and the second side are opposite to each other with respect to the common axis of the first carrier and the second carrier.

[0238] In some embodiments of this application, such as Figure 22b As shown, the overall height h of the first upper driving element 2111, the first lower driving element 2112, and the first friction plate 2213 sandwiched between the first upper driving element 2111 and the first lower driving element 2112 is not greater than the overall height of the carrier body 2211 of the first carrier 221, especially not greater than the maximum height of the lens group. Furthermore, the overall height h of the second upper driving element 2121, the second lower driving element 2122, and the second friction plate 2223 sandwiched between the second upper driving element 2121 and the second lower driving element 2122 is not greater than the overall height of the carrier body 2221 of the second carrier 222, especially not greater than the maximum height of the lens group.

[0239] In other embodiments of this application, such as Figure 22a As shown, the overall height h of the first driving element 211, the first friction mechanism 2151, and the first friction plate 2213 sandwiched between the first driving element 211 and the first friction mechanism 2151 is not greater than the overall height of the carrier body 2211 of the first carrier 221, especially not greater than the maximum height of the lens group. Similarly, the overall height h of the second driving element 212, the second friction mechanism 2152, and the second friction plate 2223 sandwiched between the second driving element 212 and the second friction mechanism 2152 is not greater than the overall height of the carrier body 2221 of the second carrier 222, especially not greater than the maximum height of the lens group.

[0240] It should be noted that, for the drive assembly 20 used to drive the lens, the adjustable group is usually installed in the receiving cavity of the carrier body of the drive carrier. Therefore, the aforementioned maximum height of the carrier body of the drive carrier is not greater than that of the drive carrier, which ensures that the overall structural height is not greater than or substantially not significantly greater than the maximum height of the lens group. This advantageously reduces the structural height of the entire camera module.

[0241] It should also be noted that the height h here refers to the structural dimension formed by the first upper driving element 2111, the first lower driving element 2112, and the first friction plate 2213 sandwiched between the first upper driving element 2111 and the first lower driving element 2112 in the superposition direction. Figure 22b The height is represented by h. The definition of height here also applies to... Figure 22a The illustrated embodiment.

[0242] Since it is difficult to reduce the height of the zoom lens group 10 in the variable focus camera module 100, the height of the variable focus camera module 100 is not increased based on the height of the zoom lens group 10 in the present application.

[0243] In some embodiments, as shown in FIG. 23, the first pre-pressure device 2301 and the second pre-pressure device 2302 each include an upper clamping portion 231, a lower clamping portion 233, and a connecting portion 232 connecting the upper clamping portion 231 and the lower clamping portion 233. Figures 18-19 The first pre-pressure device 2301 can elastically clamp the first friction plate 2213 and the first driving element 211 and the first friction mechanism 2151 (or the first upper driving element 2111 and the first lower driving element 2112) arranged on both sides of the first friction plate 2213 between the upper clamping portion 231 and the lower clamping portion 233 of the first pre-pressure device 2301, and keep the first driving element 211 and the first friction mechanism 2151 (or the first upper driving element 2111 and the first lower driving element 2112) in frictional contact with the first friction plate 2213 by the clamping force between the upper clamping portion 231 and the lower clamping portion 233, so that the driving element can drive the first friction plate 2213 to move, thereby driving the first carrier 221 to move.

[0244] As an example, for the embodiment in which the first upper driving element 2111 and the first lower driving element 2112 are arranged on both sides of the first friction plate 2213, the upper clamping portion 231 of the first pre-pressure device 2301 can be connected to the first piezoelectric ceramic plate 21111 of the first upper driving element 2111, and the lower clamping portion 233 of the first pre-pressure device 2301 can be connected to the second piezoelectric ceramic plate 21121 of the first lower driving element 2112, so that the first friction driving portion 21112 of the first upper driving element 2111 and the second friction driving portion 21122 of the first lower driving element 2112 are both pressed against the first friction plate 2213, and the first friction driving portion 21112 of the first upper driving element 2111 and the second friction driving portion 21122 of the first lower driving element 2112 are kept in frictional contact with the first friction plate 2213 by the clamping force between the upper clamping portion 231 and the lower clamping portion 233 of the first pre-pressure device 2301.

[0245]

[0246] ​Corresponding to the first pre-pressure device 2301 described above, the second pre-pressure device 2302 can elastically clamp the second friction plate 2223 and the second driving element 212 and the second friction mechanism 2152 (or the second upper driving element 2121 and the second lower driving element 2122) arranged on both sides of the second friction plate 2223 between the upper clamping portion 231 and the lower clamping portion 233 of the second pre-pressure device 2302. The second driving element 212 and the second friction mechanism 2152 (or the second upper driving element 2121 and the second lower driving element 2122) are kept in frictional contact with the second friction plate 2223 by the clamping force between the upper clamping portion 231 and the lower clamping portion 233, so that the driving element can drive the second friction plate 2223 to move, thereby driving the second carrier 222 to move. The structures and features described above in connection with the first pre-pressure device 2301 are similarly applicable to the second pre-pressure device 2302, and will not be described again here.

[0247] The first pre-pressure device 2301 and the second pre-pressure device 2302 are respectively arranged on the first side and the second side of the driving assembly 20, wherein the first side and the second side of the driving assembly 20 are opposite to each other based on the optical axis. Similarly, the first pre-pressure device 2301 acts on the first driving element 211, and the second pre-pressure device 2302 acts on the second driving element 212, so that the first driving element 211 can be in close contact with the first friction plate 2213 under the action of the first pre-pressure device 2301 to maintain friction, and the second driving element 212 can be in close contact with the second friction plate 2223 under the action of the second pre-pressure device 2302 to maintain friction.

[0248] The first pre-pressure device 2301 and the second pre-pressure device 2302 can have the same structure, for example, a steel plate with a certain elasticity, and provide a certain pre-pressure for the driving element 21 through the elasticity between the upper clamping portion 231 and the lower clamping portion 233.

[0249] In some embodiments of the present application, as shown in Figure 21 and Figure 22a A first driving substrate 271 is arranged between the first pre-pressure device 2301 and the first driving element 211, the first driving substrate 271 is electrically connected with the first driving element 211, and is used for supplying current to the first driving element 211, wherein the first driving substrate 271 is clamped on the first driving element 211 by the first pre-pressure device 2301, and

[0250] A second driving substrate 272 is arranged between the second pre-pressing device 2302 and the second driving element 212, and is electrically connected to the second driving element 212, for supplying current to the second driving element 212, wherein the second driving substrate 272 is clamped to the second driving element 212 by the second pre-pressing device 2302.

[0251] Figure 20 is a perspective view of a driving substrate according to some embodiments of the present application. As shown in the accompanying drawings, Figure 20 The driving substrate 27 includes a first driving substrate 271 and a second driving substrate 272, which are respectively electrically connected to the first driving element 211 (zoom driving element 211) and the second driving element 212 (focus driving element 212) to realize the circuit conduction of the driving assembly 20. Therefore, the first driving substrate 271 can also be referred to as a zoom substrate 271, and the second driving substrate 272 can also be referred to as a focus substrate 272.

[0252] As shown in the accompanying drawings, Figure 21 For example, the first driving substrate 271 can be arranged between the first pre-pressing device 2301 and the first driving element 211, and is clamped to the first driving element 211 by the first pre-pressing device 2301, so that the first driving substrate 271 is electrically connected to the piezoelectric ceramic plate of the piezoelectric element. The second driving substrate 272 can be arranged between the second pre-pressing device 2302 and the second driving element 212, and is clamped to the second driving element 212 by the second pre-pressing device 2302, so that the second driving substrate 272 is electrically connected to the piezoelectric ceramic plate of the piezoelectric element.

[0253] The first driving substrate 271 and the second driving substrate 272 can be arranged on the first side and the second side of the driving assembly 20 opposite to each other along the optical axis.

[0254] In some embodiments, as shown in the accompanying drawings, Figure 20 The first driving substrate 271 includes a first conductive end 2711, a second conductive end 2712, and a connecting band 2713 connecting the first conductive end 2711 and the second conductive end 2712. For example, referring to the accompanying drawings, Figure 22b The first conductive end 2711 of the first driving substrate 271 can be clamped on the first upper driving element 2111 by the upper clamping part 231 of the first pre-pressing device 2301, and the second conductive end 2712 of the first driving substrate 271 can be clamped on the first lower driving element 2112 by the lower clamping part 233 of the first pre-pressing device 2301.

[0255] Similarly, the second driving substrate 272 includes a third conductive end 2721, a fourth conductive end 2722 and a connecting band 2723 connecting the third conductive end 2721 and the fourth conductive end 2722, wherein the third conductive end 2721 of the second driving substrate 272 is clamped on the second lower driving element 2122 by the lower clamping portion 233 of the second pre-pressure device 2302, and the fourth conductive end 2722 of the second driving substrate 272 is clamped on the second upper driving element 2121 by the upper clamping portion 231 of the second pre-pressure device.

[0256] Specifically, the first conductive end 2711 of the first driving substrate 271 is arranged on the first piezoelectric ceramic plate 21111 of the first upper driving element 2111 by the upper clamping portion 231 of the first pre-pressure device 2301, the second conductive end 2712 of the first driving substrate 271 is arranged on the second piezoelectric ceramic plate 21121 of the first lower driving element 2112 by the lower clamping portion 233 of the first pre-pressure device 2301, and the second conductive end 2712 of the first driving substrate 271 extends in a direction towards the light-sensitive assembly 30 to be electrically connected to the circuit board 31. The corresponding structure is also applicable to the second driving substrate 272, which will not be described here.

[0257] As shown in FIG. 2B, the first driving substrate 271 is arranged on the first piezoelectric ceramic plate 21111 of the first upper driving element 2111 by the upper clamping portion 231 of the first pre-pressure device 2301, and the second conductive end 2712 of the first driving substrate 271 is arranged on the second piezoelectric ceramic plate 21121 of the first lower driving element 2112 by the lower clamping portion 233 of the first pre-pressure device 2301. Figure 22a -b, the second conductive end 2712 of the first driving substrate 271 is further provided with a first extension 27121, which extends inwardly (towards the optical axis) and is opposite to the first guide rod 241 based on the plane on which the first friction plate 2213 is located. That is, when the first guide rod 241 is arranged above the first carrier 221, the first extension 27121 is arranged below the first friction plate 2213, and the first guide rod 241 and the first extension 27121 are opposite to each other based on the first friction plate 2213 to make full use of the spatial position of the driving assembly 20, which is conducive to the integration of the variable focal camera module 100.

[0258] Further, the first extension 27121 can be provided with a position sensing element 28, and a sensing magnet is arranged opposite to the position sensing element 28 on the first friction plate 2213, and the position sensing element 28 detects the position change of the sensing magnet. Of course, in this application, after the position change of the sensing magnet is sensed, the moving information can be continuously transmitted to a processing element, and the processing element judges and processes the moving information of the movable carrier to form a closed loop structure. The position sensing element 28 can be a Hall element, an integrated body of a driving IC and a Hall element, or other position sensing elements 28.

[0259] The first extension part 27121 of the second conductive end 2712 can be lower than the body of the second conductive end 2712, or in other words, the first extension part 27121 is offset in a direction away from the first carrier 221, so as to provide a certain movement space for the sensing magnet and the position sensing element 28.

[0260] The third conductive end 2721 of the second driving substrate 272 is arranged on the fourth piezoelectric ceramic plate 21222 of the second lower driving element 2122 through the lower clamping part 233 of the pre-pressure device 23, the fourth conductive end 2722 of the second driving substrate 272 is arranged on the third piezoelectric ceramic plate 21212 of the second upper driving element 2121 through the upper clamping part 231 of the pre-pressure device 23, and the fourth conductive end 2722 extends in a direction towards the photosensitive assembly 30 to be electrically connected to the circuit board 31.

[0261] Further, the fourth conductive end 2722 is also provided with a second extension part 27221, which extends inwardly (towards the optical axis) and is opposite to the second guide rod 242 based on the plane where the second friction plate 2223 is located. That is, when the second guide rod 242 is arranged below the second carrier 222, the second extension part 27221 is arranged above the second friction plate 2223, the second guide rod 242 and the second extension part 27221 are opposite to each other based on the second friction plate 2223, that is, the second guide rod 242 and the second extension part 27221 are symmetrically arranged based on the second friction plate 2223, so as to make full use of the spatial position of the driving assembly 20, and facilitate the integration of the variable focal length camera module 100.

[0262] Further, the position sensing element 28 can be arranged on the second extension part 27221 of the second driving substrate 272, and a sensing magnet is arranged at a position opposite to the position sensing element 28 on the second friction plate 2223, and the position sensing element 28 detects the position change of the sensing magnet. Of course, in the present application, after the position change of the sensing magnet is sensed, the movement information can be continuously transmitted to a processing element, and the processing element judges and processes the movement information of the movable carrier to form a closed loop structure. The position sensing element 28 can be a Hall element, an integrated body of a driving IC and a Hall element, or other position sensing elements 28.

[0263] The second extension part 27221 of the fourth conductive end 2722 can have a certain height difference with the body of the fourth conductive end 2722, that is, the second extension part 27221 can be higher than the body of the fourth conductive end 2722, or the second extension part 27221 is offset in the direction away from the second carrier 222, so as to provide a certain movement space for the sensing magnet and the position sensing element 28.

[0264] In some embodiments, the first driving substrate 271 and the second driving substrate 272 are centrally symmetrical in the direction of the optical axis or in the adjustment direction, which not only can simplify the structural design of the driving substrate 27, but also can cooperate with other elements in the driving assembly 20 to provide a certain avoiding space for other elements, so that the structure of the driving assembly 20 is more compact.

[0265] In some embodiments, as shown in Figures 23-24 For the case of including the first carrier 221 and the second carrier 222, the driving assembly 20 can also correspondingly include a first bearing mechanism 2501 and a second bearing mechanism 2502.

[0266] The first bearing mechanism 2501 and the second bearing mechanism 2502 can be configured in the same structural form. In Figure 24 , the first bearing mechanism 2501 and the second bearing mechanism 2502 respectively have a plurality of positioning columns 251 forming a mounting space, and in particular, respectively have four positioning columns 251 arranged at four corners of a rectangle.

[0267] The first driving element 211 is arranged in the mounting space of the first bearing mechanism 2501 under the clamping of the first pre-pressure device 2301, and the first conductive end 2711 and the second conductive end 2712 of the first driving substrate 271 are respectively fixed on the positioning columns 251 of the first bearing mechanism 2501 outside the mounting space of the first bearing mechanism 2501.

[0268] Similarly, the second driving element 212 is arranged in the mounting space of the second bearing mechanism 2502 under the clamping of the second pre-pressure device 2302, and the third conductive end 2721 and the fourth conductive end 2722 of the second driving substrate 272 are respectively fixed on the positioning columns 251 of the second bearing mechanism 2502 outside the mounting space of the second bearing mechanism 2502.

[0269] The first bearing mechanism 2501 is arranged between the first pre-pressure device 2301 and the driving housing 26, so as to fixedly connect the first driving element 211 to the driving housing 26 through the first bearing mechanism 2501.

[0270] The first driving element 211 is clamped within the first bearing mechanism 2501 by the first preload device 2301, and the first bearing mechanism 2501 provides certain support and fixation for the first driving element 211. Similarly, the second driving element 212 is clamped within the second bearing mechanism 2502 by the second preload device 2302, and the second bearing mechanism 2502 provides certain support and fixation for the second driving element 212.

[0271] The following section uses the load-bearing mechanism 25 as an example, combined with... Figure 24 This describes the structure and arrangement of the load-bearing mechanism, which also applies to the first load-bearing mechanism 2501 and the second load-bearing mechanism 2502.

[0272] The support mechanism 25 may include, for example, a rectangular body and a plurality of positioning posts 251 extending from the body. In the installed state, the positioning posts extend toward, for example, the optical axis or toward the carrier body of the drive carrier 22. The plurality of positioning posts 251 form a U-shaped opening for placement.

[0273] Specifically, such as Figure 24 As shown, the support mechanism 25 is provided with, for example, four positioning posts 251. The drive base plate 27 can be disposed on the four positioning posts of the support mechanism 25, and the drive base plate 27 is electrically connected to the drive element 21. The support mechanism 25 can provide the drive base plate 27 with a mounting surface with good flatness.

[0274] Specifically, the first and second conductive ends of the driving substrate 27 can be fixed to the four positioning posts 251 of the bearing mechanism 25 on the outside by adhesive or welding, respectively. See also Figure 21 In the installed state, the first and second conductive ends of the drive substrate 27 are parallel to each other and parallel to the adjustment direction of the drive assembly 20, i.e., parallel to the optical axis direction of the lens group. It should be noted that the number and structure of the positioning posts 251 can be set and changed as needed, and are not limited to the forms given in the example.

[0275] Similarly, for the aforementioned first driving substrate 271 and second driving substrate 272, the first support mechanism 2501 and the second support mechanism 2502 can respectively define the length of the first conductive end 2711 and the second conductive end 2712 of the first driving substrate 271, the connection width of the connecting strip 2713, and the length of the third conductive end 2721 and the fourth conductive end 2722 of the second driving substrate 272, and the connection width of the connecting strip 2723. Here, the length is the dimension along the optical axis direction or along the adjustment direction, and the width is the dimension along the height direction. That is, the length and height of the support mechanism 25 provide a reference for the length and height of the driving substrate 27.

[0276] Optionally, the bearing mechanism 25 further comprises a bearing connecting part 252, which also extends from the body of the bearing mechanism 25, but extends in the opposite direction of the positioning column 251 of the bearing mechanism 25, i.e. the positioning column 251 and the bearing connecting part 252 are on two opposite sides of the body of the bearing mechanism 25. The bearing connecting part 252 is used to be fixedly connected with a driving housing 26, wherein the driving housing 26 comprises an upper housing 261 and a lower housing 262 connected with the upper housing 261 in a closed structure. Specifically, as shown in the drawings, the bearing connecting part 252 protruding from the bearing mechanism 25 is arranged on the side of the bearing mechanism 25 facing away from the optical axis, and the bearing connecting part 252 is fixed to the driving housing 26 and exposed to the outer surface of the driving housing 26 to fix the bearing mechanism 25 with the driving housing 26. Figure 25 The bearing connecting part 252 of the bearing mechanism 25 is arranged on the side of the bearing mechanism 25 facing away from the optical axis, and the bearing connecting part 252 is fixed to the driving housing 26 and exposed to the outer surface of the driving housing 26 to fix the bearing mechanism 25 with the driving housing 26.

[0277] As shown in the drawings, the positioning columns 251 of the bearing mechanism 25 all extend towards the corresponding driving carriers or transversely to the optical axis, so that the four positioning columns 251 of the bearing mechanism 25 form a mounting space. The driving element 21 can be clamped and arranged in the mounting space of the bearing mechanism 25 by the pre-pressure device 23, and then the pre-pressure device 23 is embedded in the bearing mechanism 25. Therefore, the bearing mechanism 25 can not only provide support for the driving element 21 and the pre-pressure device 23, but also fix the positions of the driving element 21 and the pre-pressure device 23. Figures 23-24 The bearing mechanism 25 is arranged between the pre-pressure device 23 and the driving housing 26, the bearing connecting part 252 of the bearing mechanism 25 is fixed with the driving housing 26, and the driving element 21, the pre-pressure device 23 and the driving housing 26 are fixedly connected through the bearing mechanism 25.

[0278]

[0279] Figure 25 It is a perspective view of the driving assembly 20 according to some embodiments of the present application, which comprises a driving housing 26 with an upper housing 261 and a lower housing 262. The driving housing 26 is used to accommodate the driving element 21, the driving carrier 22, the friction plate, the pre-pressure device 23, the friction mechanism 215, the guide device 24, the bearing mechanism 25, the driving base plate 27 and other components, to form protection for each element and prevent dust from falling in.

[0280] As shown in the drawings, the driving housing 26 comprises an upper housing 261 and a lower housing 262, and the lower housing 262 is a U-shaped groove structure with an upward opening, so that other elements in the driving assembly 20 can be directly put into the driving housing 26 through the opening. Figure 25 As shown in the drawings, the driving housing 26 comprises an upper housing 261 and a lower housing 262, and the lower housing 262 is a U-shaped groove structure with an upward opening, so that other elements in the driving assembly 20 can be directly put into the driving housing 26 through the opening.​

[0281] The outer side wall of the lower housing 262 is provided with a connecting groove 2623, and the bearing connecting part 252 of the bearing mechanism 25 can be clamped in the connecting groove 2623 for fixation. Alternatively, the bearing connecting part 252 of the bearing mechanism 25 is configured as a T-shaped insert which can be inserted into the connecting groove 2623 of the lower housing 262 for fixation.

[0282] In addition, as shown in Figure 25 The side wall of the lower housing 262 can also be provided with overlapping grooves with different heights, including an inner overlapping groove 2621 and an outer overlapping groove 2622, the height of the inner overlapping groove 2621 being higher than that of the outer overlapping groove 2622, so that the light not blocked by the outer overlapping groove 2622 is blocked by the inner overlapping groove 2621 to avoid the entry of stray light.

[0283] According to another aspect of the present application, a camera module 100 is also provided, which comprises:

[0284] The driving assembly 20 for driving the lens as given by the various embodiments described above;

[0285] The light sensing assembly 30 for receiving light signals and converting the received light signals into image signals;

[0286] The lens group 10 comprising a fixed group 11 and an adjustable group, wherein the driving element 21 of the driving assembly 20 is configured to drive the adjustable group of the lens group 10.

[0287] Alternatively, the adjustable group of the lens group 10 comprises a zoom group 11 and a focus group 12, wherein the driving carrier 22 of the driving assembly 20 comprises a first carrier 221 for bearing the zoom group 11 and a second carrier 222 for bearing the focus group 12, wherein the first carrier 221 and the second carrier 222 are coaxially arranged in sequence along the adjustment direction and can be driven individually.

[0288] According to the present application, the camera module 100 adopts the driving assembly 20 comprising a piezoelectric actuator as proposed herein as the driver, which not only can provide sufficient driving force, but also can provide higher precision and longer stroke driving performance to meet the zooming requirements of the variable zoom camera module 100.

[0289] Further, the piezoelectric actuator of the driving assembly 20 can have a relatively small size to better adapt to the development trend of light-weight and thin-type camera modules. Moreover, the variable zoom camera module 100 adopts a reasonable layout scheme to arrange the piezoelectric actuator in the driving assembly 20 to meet the structural and size requirements of the variable zoom camera module 100.

[0290] Figure 26 is a flowchart of an assembling method of the driving assembly 20 for driving the lens according to some embodiments of the present application. As shown in Figure 26 the assembling method of the driving assembly 20 for driving the lens is proposed herein and comprises the following steps:

[0291] S1. embedding a pre-pressure device 23 into a bearing mechanism 25 to fixedly connect the pre-pressure device 23 with the bearing mechanism 25;

[0292] S2. electrically connecting two driving elements 21 to a driving substrate 27, wherein;

[0293] S3. placing the driving substrate 27 between an upper clamping part and a lower clamping part of the pre-pressure device 23;

[0294] S4. placing a friction plate between the two driving elements 21, fixedly connecting the friction plate with the driving carrier 22, and clamping the two driving elements 21 by the pre-pressure device 23 so as to respectively maintain a frictional contact with the friction plate;

[0295] S5. fixedly connecting the bearing mechanism 25 with a driving housing 26.

[0296] Specifically, in step S1, the pre-pressure device 23 is embedded into the bearing mechanism 25 to fixedly connect the pre-pressure device 23 with the bearing mechanism 25. Herein, the pre-pressure device 23 is clamped into and fixed in a placement space of the bearing mechanism 25 formed by a plurality of positioning columns 251 by virtue of its structural elasticity or material elasticity.

[0297] In step S2, the driving elements 21 are electrically connected to the driving substrate 27. In this step, the piezoelectric plates, e.g. piezoelectric ceramic plates 213, of the two driving elements 21 are respectively electrically connected to the first and second conductive ends of the driving substrate 27, and the friction driving parts 214 of the two driving elements 21 are oppositely arranged. In the following steps, the driving substrate 27 will also be clamped onto the driving elements 21 by the pre-pressure device 23.

[0298] In step S3, the driving substrate 27 is placed between the upper clamping part 231 and the lower clamping part 233 of the pre-pressure device 23. In this step, the upper clamping part 231 and the lower clamping part 233 are respectively fixed with the first and second conductive ends of the driving substrate 27, the driving substrate 27 and the driving elements 21 are clamped in the pre-pressure device 23 by the upper clamping part 231 and the lower clamping part 233 of the pre-pressure device 23, and further the driving elements 21 are arranged in the placement space of the bearing mechanism 25.

[0299] In step S4, the friction plate is placed between the friction driving portions 214 of the two driving elements 21, and the friction driving portions 214 of the two driving elements 21 are respectively clamped on both sides of the friction plate by the pre-pressing device 23, and are in frictional contact with the friction plate.

[0300] In addition, in step S4, the first conductive end and the second conductive end of the driving substrate 27 can also be respectively fixed on the positioning columns 251 of the bearing mechanism 25 on the side surface.

[0301] In step S5, the semi-finished product assembled in the above steps, i.e., the pre-assembled parts, are placed in the lower shell 262 of the driving shell 26, and the bearing connecting portion 252 of the bearing structure 25 is embedded into the connecting groove 2623 of the lower shell 262, so as to fix the pre-assembled parts by the bearing structure 25 and the lower shell 262. Then, the upper shell 261 is installed on the lower shell 262, so as to complete the assembly of the driving assembly 20.

[0302] It should be noted that the working steps of the above assembly method are also applicable to the driving assembly 20 containing the friction mechanism 215, and the difference is only that one friction mechanism 215 is replaced by one driving element 21. In this case, since the friction mechanism 215 does not need to be electrically connected with the driving substrate 27, the structure of the driving substrate 27 and the electrical connection step can be simplified accordingly. Similarly, the working steps of the above assembly method are also applicable to the driving assembly 20 comprising one or more driving carriers 22, and especially for multiple driving carriers, only the corresponding installation steps need to be repeated.

[0303] Figure 27 is an assembly method of the camera module 100 according to some embodiments of the present application. As shown in Figure 27 According to another aspect of the present application, the present application also discloses an assembly method of a variable focal length camera module 100, comprising the following steps:

[0304] S1. The zoom group 12 and the focusing group 13 of the lens group 10 are respectively arranged in the first carrier 221 and the second carrier 222 of the driving assembly 20;

[0305] S2. The photosensitive assembly 30 is arranged on the light-emitting side of the lens group 10;

[0306] S3. The driving substrate 27 of the driving assembly 20 is electrically connected to the circuit board 31 of the photosensitive assembly 30, so as to realize circuit conduction.

[0307] Specifically, in step S1, the zoom group 12 and the focusing group 13 are respectively arranged in the first carrier 221 and the second carrier 222 of the driving assembly 20, and then the assembly steps of the driving assembly 20 are completed as described above.

[0308] Here, the optical axis directions of the zoom group 12 and the focus group 13 can be adjusted to be coaxial with the adjustment directions of the first carrier 221 and the second carrier 222, or coaxial with the geometric axes of the first carrier 221 and the second carrier 222.

[0309] In step S2, the light turning element 40 can also be arranged on the light entering side of the zoom lens group 10, and the photosensitive assembly 30 is arranged on the light exiting side of the zoom lens group 10.

[0310] In step S3, the driving substrate 27 of the driving assembly 20 is electrically connected to the circuit board 31 of the photosensitive assembly 30, so as to realize electrical circuit conduction. Here, the photosensitive chip 32 and the electronic element 33, etc. can be pre-assembled on the circuit board 31.

[0311] The technical scope of the present application is not limited to the above description, and those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical idea of the present application, and these modifications and changes all belong to the protection scope of the present application.

Claims

1. A driving assembly for driving a lens, the driving assembly comprising: The drive assembly comprises: a drive carrier having a carrier body for carrying an adjustable group of lenses; a drive element for providing a driving force for moving the drive carrier along an adjustment direction; a friction plate arranged between the drive element and the carrier body of the drive carrier, one end of the friction plate being fixedly connected to the carrier body of the drive carrier, and the other end being actionally connected to the drive element, so that the drive element can drive the friction plate to move along the adjustment direction; wherein the drive element comprises an upper drive element and a lower drive element arranged on both sides of the friction plate and clamping the friction plate therebetween, so that the friction plate can move along the adjustment direction under the cooperative driving action of the upper drive element and the lower drive element, wherein the overall height of the upper drive element, the lower drive element and the friction plate clamped therebetween is not greater than the maximum height of the carrier body of the drive carrier; the upper drive element and the lower drive element are configured as piezoelectric actuators, each comprising a piezoelectric plate and a friction driving part fixed on the piezoelectric plate, wherein the friction driving parts of the upper drive element and the lower drive element are respectively actionally connected to the friction plate on both sides, so as to cooperatively drive the friction plate to move along the adjustment direction; the piezoelectric plate generates a surface change in a traveling wave state, thereby driving the friction driving part to generate a one-way swing reciprocating motion along the optical axis direction or the adjustment direction, and due to the frictional contact between the friction driving part and the friction plate, the friction plate is further driven to move along the optical axis direction or the adjustment direction. 2.The driving assembly for driving a lens according to claim 1, wherein, a pre-pressure device is provided for providing a pre-pressure to the upper drive element and the lower drive element, so that the upper drive element and the lower drive element maintain frictional contact with the friction plate under the action of the pre-pressure. 3.The driving assembly for driving a lens according to claim 2, wherein, the pre-pressure device comprises an upper clamping part, a lower clamping part and a connecting part connecting the upper clamping part and the lower clamping part, wherein the pre-pressure device elastically clamps the friction plate and the upper drive element and the lower drive element arranged on both sides of the friction plate between the upper clamping part and the lower clamping part of the pre-pressure device. 4.The driving assembly for driving a lens according to claim 3, wherein, the drive assembly further comprises a drive substrate electrically connected to the upper drive element and the lower drive element for supplying current to the upper drive element and the lower drive element, wherein the drive substrate is clamped on the upper drive element and the lower drive element by the pre-pressure device. 5.The driving assembly for driving a lens according to claim 4, wherein, the drive substrate comprises a first conductive end, a second conductive end and a connecting band connecting the first conductive end and the second conductive end, wherein the first conductive end is clamped on the upper drive element by the upper clamping part of the pre-pressure device, and the second conductive end is clamped on the lower drive element by the lower clamping part of the pre-pressure device. 6.The driving assembly for driving a lens according to claim 5, wherein, the second conductive end of the drive substrate is provided with an extension part, wherein a position sensing element is arranged on the extension part, and a sensing magnet is arranged on the friction plate opposite to the position of the position sensing element. 7.The driving assembly for driving a lens according to claim 5, wherein, the drive assembly further comprises a carrying mechanism having a plurality of positioning columns forming a placement space, the upper drive element and the lower drive element are arranged in the placement space under the clamping of the pre-pressure device, and the drive substrate is fixed on the positioning columns of the carrying mechanism. 8.The driving assembly for driving a lens according to claim 7, wherein, The bearing mechanism further has a bearing connecting portion fixedly connected with the driving housing, wherein the driving housing comprises an upper housing and a lower housing connected with the upper housing in a closed structure.

9. The drive assembly for driving a lens according to claim 8, wherein, The side wall of the lower housing of the driving housing is provided with a connecting groove, and the bearing connecting portion of the bearing mechanism is embedded in the connecting groove for fixation. 10.The driving assembly for driving a lens according to claim 9, wherein, The side wall of the lower housing of the driving housing is further provided with an overlapping groove, and the overlapping groove comprises an inner overlapping groove and an outer overlapping groove, and the height of the inner overlapping groove is greater than the height of the outer overlapping groove. 11.The driving assembly for driving a lens according to claim 7, wherein, The driving assembly further comprises a guide device arranged in sliding connection with the driving carrier, so that the driving carrier can move along the guide device under the cooperative driving of the upper driving element and the lower driving element.

12. The drive assembly for driving a lens according to claim 11, wherein, The guide device comprises a guide rod, and the guide rod passes through the connecting hole of the connecting end of the driving carrier in parallel to the adjustment direction, so that the driving carrier can move along the guide device under the cooperative driving of the upper driving element and the lower driving element. 13.The driving assembly for driving a lens according to claim 12, wherein, The connecting end of the driving carrier comprises a first connecting end extending outward from the carrier main body of the driving carrier and a second connecting end extending outward from the carrier main body of the driving carrier, wherein the first connecting end and the second connecting end are respectively located on two sides of the carrier main body opposite to each other, and The guide device comprises a first guide rod and a second guide rod, wherein the first guide rod passes through the first connecting hole of the first connecting end of the driving carrier, and the second guide rod passes through the second connecting hole of the second connecting end of the driving carrier, so that the driving carrier can move along the first guide rod and the second guide rod of the guide device under the cooperative driving of the upper driving element and the lower driving element, wherein the first guide rod and the second guide rod are parallel to each other and arranged along the adjustment direction.

14. The drive assembly for driving a lens according to claim 13, wherein, The first guide rod and the second guide rod of the guide device have a height difference.

15. An image capturing module, comprising a driving assembly for driving a lens according to any one of claims 1 to 14; a photosensitive assembly for receiving a light signal and converting the received light signal into an image signal; a lens group comprising a fixed group and an adjustable group, wherein the driving assembly is arranged to cooperatively drive the adjustable group of the lens group under the cooperative driving of the upper driving element and the lower driving element.

16. The camera module of claim 15, wherein, The adjustable group of the lens group comprises a zoom group and a focus group, wherein the driving carrier of the driving assembly comprises a first carrier for carrying the zoom group and a second carrier for carrying the focus group, wherein the first carrier and the second carrier are coaxially arranged in sequence along the adjustment direction and can be driven separately.

17. The camera module of claim 16, wherein, The driving assembly further comprises: a first driving element for providing a driving force for moving the first carrier along the adjustment direction; a first friction plate arranged between the carrier main body of the first carrier and the first driving element, wherein one end of the first friction plate is fixedly connected with the carrier main body of the first carrier, and the other end is actionally connected with the first driving element, so that the first driving element can drive the first friction plate to move along the adjustment direction, The first driving element comprises a first upper driving element and a first lower driving element arranged on both sides of the first friction plate and clamping the first friction plate in the middle, so that the first friction plate can move along the adjustment direction under the cooperative driving action of the first upper driving element and the first lower driving element. The second driving element is used for providing driving force for moving the second carrier along the adjustment direction. The second friction plate is arranged between the carrier body of the second carrier and the second driving element, one end of the second friction plate is fixedly connected with the carrier body of the second carrier, and the other end is actionally connected with the second driving element, so that the second driving element can drive the second friction plate to move along the adjustment direction. The second driving element comprises a second upper driving element and a second lower driving element arranged on both sides of the second friction plate and clamping the second friction plate in the middle, so that the second friction plate can move along the adjustment direction under the cooperative driving action of the second upper driving element and the second lower driving element.

18. The camera module of claim 17, wherein, The first upper driving element and the first lower driving element arranged on both sides of the first friction plate and clamping the first friction plate in the middle are located on the first side of the driving assembly, and the second upper driving element and the second lower driving element arranged on both sides of the second friction plate and clamping the second friction plate in the middle are located on the second side of the driving assembly, wherein the first side and the second side are opposite to each other relative to the axis of the first carrier and the second carrier.

19. The camera module of claim 18, wherein, The overall height of the first upper driving element and the first lower driving element and the first friction plate clamped therebetween is not greater than the maximum height of the lens group, and the overall height of the second upper driving element and the second lower driving element and the second friction plate clamped therebetween is not greater than the maximum height of the lens group.

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