CN116132761A - Driving assembly and camera module - Google Patents

Abstract

The driving assembly is provided with a self-locking assembly between a fixed part and a movable part of the driving assembly, and the self-locking assembly is configured to work in a switchable manner in a conducting state and a non-conducting state. In the on state, the driving element and the self-locking assembly are electrically conducted, the driving element is suitable for driving the movable part to move relative to the fixed part, and the self-locking assembly is suitable for being deformed so that a gap exists between the self-locking assembly and the movable part; in the non-conductive state, the drive element and the self-locking assembly are not electrically conductive, the self-locking assembly being adapted to deform in a direction opposite to that in the conductive state to provide a resistance for resisting movement of the movable portion due to inertia.

Description

Driving assembly and camera module

Technical Field

The application relates to the field of camera modules, in particular to a driving assembly and a camera module, wherein the driving assembly is provided with a self-locking assembly between a fixed part and a movable part of the driving assembly, so that the driving assembly is in a non-working state through the self-locking assembly, the movable part of the driving assembly is blocked to continue moving due to inertia, and thus dirt such as debris is generated by the movable part due to inertia, and the movable part is prevented from being impacted to the fixed part after the driving assembly is switched from the working state to the non-working state.

Background

With the popularity of mobile electronic devices, related technologies applied to camera modules of mobile electronic devices for helping users acquire images (e.g., videos or images) have been rapidly developed and advanced. The size of the photosensitive chip of the camera module used for the mobile electronic equipment is larger and larger, and the optical lens matched with the photosensitive chip is heavier and heavier, so that the problem of stain caused by the collision of the rotor and the stator inside the motor for driving the optical lens to move is more obvious.

Specifically, the motor for the camera module includes a fixed portion (i.e., a stator) and a movable portion (i.e., a mover) movable relative to the fixed portion, wherein the movable portion is identical to the optical lens mounted therein, and further includes a driving member, such as a coil, a magnet, and the like, for driving the movable portion to move relative to the fixed portion. It should be understood that, when the weight of the optical lens is larger, the inertia of the movable portion carrying the optical lens is larger, so that when the motor is switched from the working state to the non-working state, the movable portion carrying the optical lens keeps the original movement mode and collides with the fixed portion under the action of the inertia. In order to avoid the collision, the conventional motor may set a limiting portion between the mover and the stator, for example, a limiting spring is set between the mover and the stator, but as the weight of the optical lens increases continuously, the resistance provided by the limiting spring cannot ensure that the collision between the movable portion and the fixed portion does not occur.

Therefore, a more optimized motor solution is desired to ensure that the motor is not bumped with the stator in the non-operating state, thereby avoiding the problem of dirt inside the motor.

Disclosure of Invention

An advantage of the present application is that it provides a driving assembly and camera module, wherein, the driving assembly is equipped with auto-lock subassembly between its fixed part and movable part, in order to pass through auto-lock subassembly the driving assembly is in the resistance that the movable part of driving assembly was kept on moving because of inertia under the non-operating condition provides to avoid after the driving assembly switches from operating condition to non-operating condition, the movable part is because of inertia striking the fixed part is in order to produce dirty such as piece.

Another advantage of the present application is to provide a driving assembly and a camera module, wherein in one embodiment of the present application, the self-locking assembly is used to prevent the movable portion of the driving assembly from moving due to inertia through friction self-locking between the driving assembly and the movable portion of the driving assembly in a non-working state, so as to avoid that the movable portion impacts the fixed portion due to inertia to generate dirt such as debris after the driving assembly is switched from the working state to the non-working state.

Still another advantage of the present application is that it provides a driving assembly and a camera module, wherein, the self-locking assembly is in the driving assembly is in the operating condition and can not hinder the movable portion is in the effect of the driving element of the driving assembly for the fixed portion takes place to remove, in the driving assembly is in the non-operating condition, can avoid the movable portion is because of inertia striking the fixed portion in order to produce dirty such as piece.

Still another advantage of the present application is to provide a driving assembly and a camera module, wherein the self-locking assembly can avoid the movable portion from being bumped with the fixed portion due to inertia, so that the self-locking assembly can prevent the driving assembly from generating noise such as abnormal impact.

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

To achieve at least one of the above advantages, the present application provides a driving assembly, comprising:

a fixing part;

a movable portion, wherein the movable portion is adapted to mount an optical lens therein;

a driving element for driving the movable portion to move relative to the fixed portion; and

The self-locking assembly comprises at least one self-locking element arranged between the fixed part and the movable part, and the self-locking element is configured to work in a switchable manner in a conducting state and a non-conducting state;

in the on state, the driving element is suitable for driving the movable part to move relative to the fixed part, and the self-locking element is suitable for being deformed so that a gap is formed between the self-locking element and the movable part;

in the non-conducting state, the self-locking element is suitable for being deformed so that the self-locking element is abutted against the movable part.

In the driving assembly according to the present application, in the non-conductive state, the self-locking element is adapted to deform in a direction approaching the movable portion so as to collide with the movable portion.

In the driving assembly according to the present application, in the non-conductive state, the self-locking element is adapted to deform in a direction approaching the fixed portion so as to abut against the fixed portion, and the other end of the self-locking element opposite to the end abutting against the fixed portion abuts against the movable portion.

In a drive assembly according to the present application, the self-locking element is arranged to the movable part, wherein the self-locking assembly comprises a connecting line extending between the self-locking element and the movable part.

In the driving assembly according to the present application, the fixed portion includes a base and an outer housing, the movable portion is movably coupled to the base, and the movable portion and the base are enclosed in the outer housing.

In the driving assembly according to the present application, the driving assembly further includes a spring structure erected between the movable portion and the base, so that the movable portion is suspended and supported to the base by the spring structure.

In the drive assembly according to the present application, the self-locking element is provided between the upper end surface of the movable portion and the outer case.

In the drive assembly according to the present application, the self-locking element is provided between the outer peripheral surface of the movable portion and the base.

In the driving assembly according to the present application, the movable portion has at least one groove concavely formed on an outer peripheral surface thereof, wherein in the non-conductive state, the self-locking element is adapted to be deformed to approach and fit into the groove.

In the drive assembly according to the present application, the self-locking assembly further includes at least one SMA wire extending between the self-locking element and the fixed portion, such that the self-locking element is suspended between the movable portion and the fixed portion by the at least one SMA wire;

In the on state, the at least one SMA wire is conducted and pulls the self-locking element to deform in a direction away from the movable part so that a gap exists between the self-locking element and the movable part;

and in the non-conducting state, the self-locking element deforms in a direction approaching to the movable part and is embedded in the groove.

In the drive assembly according to the present application, the at least one SMA wire comprises a first SMA wire extending from a first end of the self-locking element to the fixed portion and a second SMA wire extending from a second end of the self-locking element opposite the first end to the fixed portion.

In the drive assembly according to the present application, in the non-conducting state, the central region of the self-locking element is in abutment with the recess.

In the drive assembly according to the present application, the width dimension of the self-locking element is equal to the width dimension of the recess.

In the driving assembly according to the present application, the at least one groove includes a first groove corresponding to the first end of the self-locking element and a second groove corresponding to the second end of the self-locking element, wherein in the non-conductive state, the first end of the self-locking element is engaged with the first groove, and the second end of the self-locking element is engaged with the second groove.

In the drive assembly according to the present application, the inner surfaces of the first groove and the second groove are arcuate surfaces.

In the drive assembly according to the present application, the self-locking element is made of a material selected from the group consisting of: any one of silica gel, rubber and metal.

In the driving assembly according to the present application, the at least one groove includes a first groove and a second groove formed at two opposite ends of one side surface of the outer circumferential surface of the movable portion, the at least one self-locking element includes a first self-locking element corresponding to the first groove and a second self-locking element corresponding to the second groove, wherein the self-locking assembly further includes a first SMA wire extending between the first self-locking element and the fixed portion and a second SMA wire extending between the second self-locking element and the fixed portion;

in the on state, the first SMA wire and the second SMA wire pull the first self-locking element and the second self-locking element respectively to deform in a direction away from the movable part, so that gaps are formed between the first self-locking element and the movable part and between the second self-locking element and the movable part;

In the non-conducting state, the first self-locking element and the second self-locking element deform in a direction approaching to the movable part and are respectively embedded in the first groove and the second groove.

In a drive assembly according to the present application, the first self-locking element comprises a first self-locking body and a first self-locking head extending obliquely from the first self-locking body, the second self-locking element comprises a second self-locking body and a second self-locking head extending obliquely from the second self-locking body, wherein the first and second grooves and the first and second self-locking elements have adapted shapes and sizes.

In a drive assembly according to the present application, the first and second self-locking elements are made of a material selected from the group consisting of: any one of silica gel, rubber and metal.

In the driving assembly according to the present application, the self-locking element is made of a magnetically attractive material, and the self-locking assembly further includes a magnetically attractive member provided to the fixing portion and corresponding to the self-locking element;

wherein in the on state, the magnetic attraction member is turned on to attract the self-locking element to deform in a direction away from the movable portion so that a gap is provided between the self-locking element and the movable portion;

And under the non-conducting state, the self-locking element deforms in the direction approaching to the movable part and is respectively embedded in the grooves.

In the driving assembly according to the present application, the self-locking element includes a first plate material and a second plate material stacked on each other, and a thermal expansion coefficient of the first plate material is larger than a thermal expansion coefficient of the second plate material; wherein the self-locking assembly further comprises at least one connecting strap extending between the self-locking element and the fixing portion;

under the non-conduction state, the first plate with the higher thermal expansion coefficient drives the second plate with the smaller thermal expansion coefficient to warp so that the self-locking element deforms in the direction close to the movable part and is embedded in the groove.

In the drive assembly according to the present application, the self-locking element is made of a memory metal, wherein the self-locking assembly further comprises at least one connecting band extending between the self-locking element and the fixing portion;

wherein in the on state, the self-locking element is turned on to be tensioned in a direction away from the movable portion so that there is a gap between the self-locking element and the movable portion;

In the non-conducting state, the self-locking element stretches in a direction approaching to the movable part and is embedded in the groove.

According to another aspect of the present application, there is also provided a camera module, including:

a photosensitive assembly;

a drive assembly as described above mounted on the photosensitive assembly;

an optical lens, wherein the optical lens is held on a photosensitive path of the photosensitive assembly in such a manner as to be mounted in a movable portion of the driving assembly.

Further objects and advantages of the present application will become fully apparent from the following description and the accompanying drawings.

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

Drawings

The foregoing and other objects, features and advantages of the present application will become more apparent from the following more particular description of embodiments of the present application, as illustrated in the accompanying drawings. The accompanying drawings are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate the application and not constitute a limitation to the application. In the drawings, like reference numerals generally refer to like parts or steps.

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

Fig. 2 illustrates a perspective exploded view of a driving assembly of the camera module according to an embodiment of the present application.

Fig. 3 illustrates a perspective exploded view of a variant implementation of the drive assembly according to an embodiment of the present application.

Fig. 4 illustrates a perspective exploded view of another variant implementation of the drive assembly according to an embodiment of the present application.

Fig. 5 illustrates a schematic perspective exploded view of yet another variant implementation of the drive assembly according to an embodiment of the present application.

Fig. 6 illustrates a schematic perspective exploded view of yet another variant implementation of the drive assembly according to an embodiment of the present application.

Fig. 7 illustrates a perspective exploded view of yet another variant implementation of the drive assembly according to an embodiment of the present application.

Fig. 8 illustrates a perspective exploded view of yet another variant implementation of the drive assembly according to an embodiment of the present application.

Fig. 9 illustrates a perspective exploded view of yet another variant implementation of the drive assembly according to an embodiment of the present application.

Detailed Description

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

Exemplary camera Module

As shown in fig. 1 and 2, an imaging module according to an embodiment of the present application is illustrated, where the imaging module includes: a photosensitive assembly 10, a driving assembly 20 mounted on the photosensitive assembly 10, and an optical lens 30 held on a photosensitive path of the photosensitive assembly 10 so as to be mounted in the driving assembly 20.

In the embodiment of the present application, the optical lens 30 includes at least one optical lens 32, and those skilled in the art will appreciate that the resolution of the optical lens 30 is proportional to the number of optical lenses 32, that is, the higher the resolution, the more the number of optical lenses 32. Therefore, in the embodiment of the present application, the optical lens 30 preferably includes a plurality of optical lenses 32, for example, 4, 5, or 6 optical lenses 32.

In particular, in the embodiment of the present application, the optical lens 32 of the optical lens 30 is directly mounted in the movable portion 22 of the driving assembly, that is, in the embodiment of the present application, the optical lens 20 and the movable portion 22 of the driving assembly 20 have an integral structure, and the movable portion of the driving assembly 20 forms a mounting carrier of at least one optical lens 32 of the optical lens 30. Of course, in the embodiment of the present application, a lens barrel may be further provided for the optical lens 32, and the optical lens 32 is mounted in the driving assembly 20 after being mounted in the lens barrel, which is not limited in the present application.

In the embodiment of the present application, the photosensitive assembly 10 includes: a circuit board 11, a photosensitive chip 12, a lens base 13 and a filter element 14, wherein the circuit board 11 is used as a mounting substrate of the photosensitive assembly 10. Specifically, the photosensitive chip 12 is electrically connected to the circuit board 11 (for example, in one example, the photosensitive chip 12 is mounted on the upper surface of the circuit board 11 and is electrically connected to the circuit board 11 by wire bonding), so that the circuit board 11 provides the control circuit and the electric power required for the operation of the photosensitive chip 12.

The lens mount 13 is disposed on the circuit board 11 and is used for supporting other components, wherein the lens mount 13 has an optical window corresponding to at least a photosensitive region of the photosensitive chip 12. For example, in one specific example of the present application, the lens holder 13 is implemented as a separately molded plastic holder that is attached to the surface of the circuit board 11 by an adhesive and is used to support other components. Of course, in other examples of the present application, the lens base 13 may be formed on the circuit board 11 in other manners, for example, the lens base 13 is implemented as a molded lens base 13 integrally formed at a predetermined position of the circuit board 11 through a molding process.

Further, in some specific examples of the present application, the optical filter element 14 may be mounted on the lens base 13, so that the optical filter element 14 is kept on the photosensitive path of the photosensitive chip 12, so that, during the process of passing the external light through the optical filter element 14 to reach the photosensitive chip 12, the stray light in the external light can be filtered by the optical filter element 14, so as to improve the imaging quality. It should be noted that, in other examples of the present application, the filter element 14 can also be mounted on the lens holder 13 in other manners, for example, a filter element holder is provided on the lens holder 13 first, and then the filter element 14 is mounted on the filter element holder, that is, in this example, the filter element 14 may be indirectly mounted on the lens holder 13 through other supports. Of course, in other examples of the present application, the filter element 14 may also be mounted at other positions of the camera module, for example, the filter element 14 may be formed in the optical lens 30 (for example, as a filter film attached to a surface of a certain optical lens of the optical lens 30), which is not limited in this application.

In the embodiment of the present application, the driving component 20 is used to adjust the relative positional relationship between the optical lens 30 and the photosensitive component 10 so as to adjust the optical performance of the image capturing module, for example, in a specific example of the present application, the driving component 20 is used to drive the optical lens 30 to move along the photosensitive path set by the photosensitive component 10 for optical focusing. Of course, in other examples of the present application, the driving assembly 20 may also perform other functions, such as driving the optical lens 30 to move in a plane perpendicular to the photosensitive path for optical anti-shake, which is not limited in this application.

As described above, as the imaging pixels of the camera module become larger, that is, the size of the photosensitive chip becomes larger, the optical lens 30 adapted to the photosensitive chip becomes heavier, which makes the problem of internal contamination of the driving assembly 20 for driving the optical lens 30 to move more remarkable.

In view of the above-mentioned technical problems, in the present embodiment, the driving assembly 20 is provided with a self-locking assembly 23 between the fixed portion 21 and the movable portion 22 thereof, so as to prevent the movable portion 22 from moving due to inertia through the resistance provided by the self-locking assembly 23 when the driving assembly 20 is in the non-working state, thereby avoiding that the movable portion 22 impacts the fixed portion 21 due to inertia to generate dirt such as debris after the driving assembly 20 is switched from the working state to the non-working state.

For example, in the embodiment of the present application, the self-locking assembly 23 is used to prevent the movable portion 22 from moving due to inertia by friction self-locking between the driving assembly 20 and the movable portion 22 of the driving assembly 20 in the non-operating state, so that the movable portion 22 is prevented from striking the fixed portion 21 due to inertia to generate dirt such as debris after the driving assembly 20 is switched from the operating state to the non-operating state.

Specifically, as shown in fig. 1 and 2, in the embodiment of the present application, in a specific example of the present application, the driving assembly 20 is implemented as an electromagnetic driving assembly 20, which includes a fixed portion 21, a movable portion 22 movable with respect to the fixed portion 21, and a driving element 24 for driving the movable portion 22 to move with respect to the fixed portion 21. Accordingly, the movable part 22 has a lens mounting cavity 220, and the optical lens 30 is mounted in the lens mounting cavity 220, so that when the movable part 22 moves relative to the fixed part 21 under the action of the driving element 24, the movable part 22 can bear the optical lens 30 to move so as to adjust the relative positional relationship between the optical lens 30 and the photosensitive assembly 10.

As shown in fig. 1 and 2, in the embodiment of the present application, the fixed portion 21 includes a base 211 and an outer housing 212, wherein the movable portion 22 is movably coupled to the base 211, and the movable portion 22 and the base 211 are enclosed in the outer housing 212. In the example shown in fig. 1 and 2, the driving assembly 20 further includes a spring plate structure 25 erected between the movable portion 22 and the base 211, so that the movable portion 22 is suspended and supported to the base 211 by the spring plate structure 25. That is, in this example, the base 211 and the movable portion 22 are coupled by the elastic piece structure 25, wherein the movable portion 22 is movable with respect to the base 211 and the elastic piece structure 25 is capable of restricting the movement of the movable portion 22.

Specifically, the spring plate structure 25 includes a first elastic element that is disposed between a lower end portion of the base 211 and a lower end portion of the movable portion 22, and a second elastic element that is disposed between an upper end portion of the base 211 and an upper end portion of the movable portion 22, in such a manner that the base 211 is suspended and sandwiched between the first elastic element and the second elastic element to vertically position and vertically support the base 211 by the first elastic element and the second elastic element.

It should be noted that, although in the embodiment of the present application, the connection between the movable portion 22 and the base 211 through the elastic piece structure 25 is taken as an example, it should be understood that in other examples of the present application, the connection between the movable portion 22 and the base 211 may be performed by other manners, for example, by a ball structure, which is not exemplified in the present application.

Accordingly, in the present embodiment, the driving element 24 is a coil-magnet pair. In particular, in the example illustrated in fig. 1 and 2, the coil is provided to the movable portion 22, and the magnet is provided to the fixed portion 21 so as to oppose the coil. Also, in this example, the movable portion 22 has a structural configuration of an inner and outer circumference, that is, the lens mounting cavity 220 of the movable portion 22 is circular, and the outer circumference of the movable portion 22 is square, wherein the coil-magnet pairs are respectively provided at four corner regions of the outer circumference of the movable portion 22, and in such a deployment manner, the utilization of the inner space of the driving assembly 20 is fully utilized so that the driving assembly 20 has a relatively more compact structure.

Of course, in other examples of the present application, the positions of the coil and the magnet may be changed, that is, the coil is provided in the fixed portion 21 and the magnet is provided in the movable portion 22, which is not limited to the present application. The positions of the coil-magnet pairs disposed in the driving unit 20 may be adjusted, for example, the coil-magnet pairs are disposed on four sides of the movable carrier, which is not limited to the present application.

Particularly, as the weight of the optical lens 30 increases, the inertia of the movable portion 22 carrying the optical lens 30 increases, so that when the driving assembly 20 is switched from the working state to the non-working state, the movable portion 22 carrying the optical lens 30 keeps the original movement mode and collides with the fixed portion 21 under the action of the inertia. That is, as the weight of the optical lens 30 increases, the resistance provided by the elastic member 25 cannot ensure that the movable portion 22 and the fixed portion 21 are not impacted.

Accordingly, as shown in fig. 1 and 2, in order to prevent dirt such as debris generated by collision between the movable portion 22 and the fixed portion 21, in the embodiment of the present application, the driving unit 20 further includes a self-locking unit 23 disposed between the fixed portion 21 and the movable portion 22, so as to prevent the movable portion 22 from moving due to inertia by friction self-locking between the self-locking unit 23 and the movable portion 22 of the driving unit 20 when the driving unit 20 is in a non-operating state.

Specifically, in the embodiment of the present application, the self-locking assembly 23 includes at least one self-locking element 231 disposed between the fixed portion 21 and the movable portion 22, wherein the self-locking element 231 is configured to switchably operate in an on state and a non-on state. Wherein in the on state, the driving element 24 and the self-locking element 231 are electrically conducted, the driving element 24 is adapted to drive the movable portion 22 to move relative to the fixed portion 21, the self-locking element 231 is adapted to deform away from the movable portion 22, and a gap is formed between the self-locking element 231 and the movable portion 22, in such a way that the self-locking element 231 does not prevent the movable portion 22 from moving under the action of the driving element 24. In the non-conducting state, the driving element 24 and the self-locking element 231 are not electrically conducted, and the self-locking element 231 is adapted to deform to approach and abut against the movable portion 22, so as to prevent the movable portion 22 from moving due to inertia by friction between the self-locking element 231 and the movable portion 22.

In the example illustrated in fig. 1 to 2, the self-locking element 231 is disposed between the outer circumferential surface of the movable portion 22 and the base 211, wherein the self-locking element 231 has a plate-type structure made of a material including, but not limited to, silicone, rubber, metal, etc. It should be noted that the silicone and rubber are materials having elasticity themselves, and the metal is a material having elasticity after being deformed, and thus, the self-locking element 231 is made of an elastic material. Accordingly, when not energized (i.e., when in a non-conductive state), the warped self-locking element 231 catches the movable portion 22 to restrict movement of the movable portion 22 from striking between the movable portion 22 and the fixed portion 21. When energized (i.e., in an on state), the self-locking element 231 is straightened by force and has a certain clearance with the movable portion 22, so that the self-locking element 231 does not hinder the movable portion 22 from moving relative to the fixed portion 21.

More specifically, in the example illustrated in fig. 1 and 2, the self-locking element 231 is disposed on a side wall of the base 211, wherein an SMA wire 232 (memory metal wire) is connected to upper and lower ends of the self-locking element 231, respectively, so as to fix the self-locking element 231 to the fixing portion 21 in a suspending manner through the SMA wire 232. That is, in the embodiment of the present application, the self-locking assembly 23 further includes at least one SMA wire 232 extending between the self-locking element 231 and the fixed portion 21, such that the self-locking element 231 is suspended between the movable portion 22 and the fixed portion 21 by the at least one SMA wire 232. Specifically, the at least one SMA wire 232 includes a first SMA wire 232 and a second SMA wire 232, wherein the first SMA wire 232 extends from a first end of the self-locking element 231 to the fixing portion 21, and the second SMA wire 232 extends from a second end of the self-locking element 231 opposite to the first end to the fixing portion 21. For example, in one specific example, the first SMA wire 232 extends from a first end of the self-locking element 231 to the outer housing 212, and the second SMA wire 232 extends from a second end of the self-locking element 231 opposite the first end to the outer housing 212, in such a way that the self-locking element 231 is suspended and fixed to the fixing portion 21.

Accordingly, in the on state, the first SMA wire 232 and the second SMA wire 232 are turned on and pull the self-locking element 231 to deform in a direction away from the movable portion 22 so that there is a gap between the self-locking element 231 and the movable portion 22, for example, in a specific example of the present application, the self-locking element 231 deforms in a direction away from the movable portion 22 under the action of the first SMA wire 232 and the second SMA wire 232 and eventually there is a gap between the self-locking element 231 and the movable portion 22, and the self-locking element 231 is parallel to a side surface of the movable portion 22. It should be appreciated that in the energized state, the first SMA wire 232 and the second SMA wire 232 shrink based on the characteristics of thermal expansion and contraction thereof, thereby pulling the self-locking element 231 away from the movable portion 22 from the first end and the second end, respectively, of the self-locking element 231, and eventually, the self-locking element 231 is straightened with a gap from the movable portion 22. In the non-energized state, the first SMA wire 232 and the second SMA wire stretch first, and the self-locking element 231 itself has elasticity to deform in a direction approaching the movable portion 22 and finally collide with the outer peripheral surface of the movable portion 22. It should be understood that when the self-locking element 231 collides with the outer circumferential surface of the movable portion 22, there is friction between the self-locking element 231 and the movable portion 22 to lock the movable portion 22 by the friction therebetween, so as to prevent the movable portion 22 from colliding with the fixed portion 21 due to inertia.

In order to enhance the self-locking effect, in this example, the movable portion 22 has at least one groove 221 concavely formed on the outer circumferential surface thereof, wherein in the non-conductive state, the self-locking element 231 is adapted to be deformed to approach and fit into the groove 221. That is, in this example, in the on state, the first SMA wire 232 and the second SMA wire 232 are turned on and pull the self-locking element 231 to deform in a direction away from the movable portion 22 so that there is a gap between the self-locking element 231 and the movable portion 22, and in the off state, under the action of the self-elasticity of the first SMA wire 232 and the second SMA wire 232 and the self-locking element 231, the self-locking element 231 deforms in a direction approaching the movable portion 22 and is fitted into the groove 221, in such a way as to prevent the movable portion 22 from colliding with the fixed portion 21.

In summary, the camera module according to the embodiment of the present application is illustrated, wherein the driving component 20 of the camera module is provided with a self-locking component 23 between the fixed portion 21 and the movable portion 22 thereof, so as to prevent the movable portion 22 from moving due to inertia by friction self-locking between the self-locking component 23 and the movable portion 22 of the driving component 20 when the driving component 20 is in the non-working state, thereby avoiding that the movable portion 22 impacts the fixed portion 21 due to inertia to generate dirt such as chips after the driving component 20 is switched from the working state to the non-working state.

Fig. 3 illustrates a schematic perspective exploded view of a variant implementation of the drive assembly 20 according to an embodiment of the present application. As shown in fig. 3, in accordance with the embodiment illustrated in fig. 2, in this modified embodiment, the self-locking element 231 is made of an elastic material, and an SMA wire 232 (memory metal wire) is connected to each of the upper and lower ends of the self-locking element 231 to fix the self-locking element 231 to the fixing portion 21 in a suspended manner via the SMA wire 232. That is, in this embodiment, the driving assembly 20 includes a first SMA wire 232 extending from a first end of the self-locking element 231 to the fixing portion 21 and a second SMA wire 232 extending from a second end of the self-locking element 231 opposite to the first end to the fixing portion 21, so that the self-locking element 231 is suspended and fixed to the fixing portion 21 by the first SMA wire 232 and the second SMA wire 232.

Unlike the embodiment illustrated in fig. 2, in this variant embodiment, the movable part 22 has, on its outer surface, a first recess 221 corresponding to the first end of the self-locking element 231 and a second recess 221 corresponding to the second end of the self-locking element 231. Accordingly, in the non-conductive state, the first end of the self-locking element 231 is engaged with the first groove 221, and the second end of the self-locking element 231 is engaged with the second groove 221, so as to improve the locking effect. Preferably, in the embodiment of the present application, the inner surfaces of the first groove 221 and the second groove 221 are arc surfaces, and more preferably, the inner surfaces of the first groove 221 and the second groove 221 define a circle, wherein the circle and the circular through hole of the lens mounting hole are concentric circles.

That is, unlike the embodiment illustrated in fig. 2, in this modified embodiment, the movable portion 22 is provided with a groove 221 at each of both ends of one side thereof, and the width of the groove 221 is the same as the width of the self-locking element 231. Preferably, the inner side of the groove 221 is arc-shaped, and the arc and the circular through hole on the inner side of the movable portion 22 are concentric. Accordingly, by utilizing the heat shrinkage and cold expansion characteristics of the SMA wire 232, when the SMA wire 232 is energized, the SMA wire 232 contracts and pulls the self-locking element 231 to straighten the self-locking element 231, and a certain gap is formed between the element and the first groove 221 and between the element and the second groove 221, so that the movable part 22 can normally move and work. When the electric motor is not electrified, the SMA wire 232 stretches to enable the self-locking element 231 to warp outwards, at this time, the self-locking element 231 is in a bending state, two ends of the self-locking element 231 are attached to the arc positions of the first groove 221 and the second groove 221, and the movement of the movable part 22 is limited by friction force, so that not only the function of limiting the rotor of the motor, but also the power-off self-locking function is realized.

Fig. 4 illustrates a schematic perspective exploded view of another variant implementation of the drive assembly 20 according to an embodiment of the present application. As shown in fig. 4, in this embodiment, the movable portion 22 has a first groove 221 and a second groove 221 formed at two opposite ends of one side surface of the outer peripheral surface of the movable portion 22, and the self-locking assembly 23 includes a first self-locking element 231 corresponding to the first groove 221 and a second self-locking element 231 corresponding to the second groove 221, the self-locking assembly 23 further includes a first SMA wire 232 extending between the first self-locking element 231 and the fixed portion 21 and a second SMA wire 232 extending between the second self-locking element 231 and the fixed portion 21, wherein in the on state, the first SMA wire 232 and the second SMA wire 232 pull the first self-locking element 231 and the second self-locking element 231, respectively, to deform in a direction away from the movable portion 22 such that a gap is provided between the first self-locking element 231 and the movable portion 22 and between the second self-locking element 231 and the second self-locking element 22, and in the on state, the first self-locking element 231 and the second self-locking element 221 deform in the on state adjacent to the first self-locking element 231 and the second self-locking element 221.

That is, in this modified embodiment, a pair of the self-locking elements 231 are provided side by side on both ends of one side outside of the movable portion 22, and a groove 221 is provided on each of both ends of one side outside of the movable portion 22, wherein the pair of the grooves 221 and the pair of the self-locking elements 231 correspond to each other. In particular, in the present embodiment, the first self-locking element 231 and the second self-locking element 231 have a special shape configuration, wherein the first self-locking element 231 includes a first self-locking body and a first self-locking head extending obliquely from the first self-locking body, and the second self-locking element 231 includes a second self-locking body and a second self-locking head extending obliquely from the second self-locking body. That is, in this modified embodiment, the upper end heads of the first and second self-locking elements 231 and 231 are bent at an angle. Also, in the present embodiment, the first groove 221 and the second groove 221 and the first self-locking element 231 and the second self-locking element 231 have the shape and the size adapted.

Preferably, the widths of the first groove 221 and the second groove 221 are the same as those of the first self-locking element 231 and the second self-locking element 231, so that when the SMA wire 232 is energized, the first SMA wire 232 and the second SMA wire 232 shrink and pull the first self-locking element 231 and the second self-locking element 231 respectively to straighten the first self-locking element 231 and the second self-locking element 231, and at this time, the first self-locking element 231 and the second self-locking element 231 and the first groove 221 and the second groove 221 have a certain gap respectively, so that the movable part 22 can work in normal motion; when not energized, the first SMA wire 232 and the second SMA wire 232 stretch to make the first self-locking element 231 and the second self-locking element 231 warp outwards, at this time, the first self-locking element 231 and the second self-locking element 231 are in a curved state, and the upper end heads of the first self-locking element 231 and the second self-locking element 231 are in fit with the curved parts of the first groove 221 and the second groove 221 of the movable portion 22, so that the movement of the movable portion 22 is limited by using the friction force between the two parts to realize the outage self-locking function.

Fig. 5 illustrates a schematic perspective exploded view of yet another variant implementation of the drive assembly 20 according to an embodiment of the present application. Unlike the embodiment illustrated in fig. 2 to 4, in the variant embodiment illustrated in fig. 5, the self-locking element 231 is made of a magnetically attractive material, wherein the self-locking assembly 23 further comprises a magnetically attractive part 232A provided to the fixing portion 21 and corresponding to the self-locking element 231. Accordingly, in the on state, the magnetic attraction member 232A is turned on to attract the self-locking element 231 to deform in a direction away from the movable portion 22 so that a gap is provided between the self-locking element 231 and the movable portion 22; in the non-conductive state, the self-locking element 231 deforms in a direction approaching the movable portion 22 and is respectively engaged in the grooves 221.

More specifically, in this variant embodiment, the self-locking assembly 23 includes a magnetic attraction member 232A and a self-locking element 231 disposed opposite to each other, wherein the magnetic attraction member 232A includes a coil and an electromagnet, and the electromagnet and the self-locking element 231 are made of a material including, but not limited to, a soft magnetic material (e.g., pure iron, silicon steel) or a composite material containing soft magnetism. In this modified embodiment, the magnetic member 232A is disposed on the outer side of the self-locking element 231 in the fixing portion 21, and has a certain gap with the self-locking element 231. The self-locking element 231 is disposed in the groove 221 of the movable portion 22, wherein the width of the groove 221 is preferably the same as the width of the self-locking element 231, and the length dimension of the groove 221 is preferably similar to the length dimension of the self-locking element 231.

Accordingly, when not energized, the self-locking element 231 is configured in such a manner that the self-locking element 231 is inwardly warped to be engaged with the groove 221, so that the movement of the movable portion 22 is limited by friction therebetween, and in this way, both the motor mover limiting function and the power-off self-locking function are realized. When the current is applied, the magnetic attraction component 232A generates a magnetic field, and has a certain attraction force to the self-locking element 231, and at this time, the self-locking element 231 deforms in a direction away from the movable portion 22 and finally becomes a straightened state under the attraction of the magnetic field force, and is nearly parallel to the groove 221 with a certain gap therebetween, so that the movable portion 22 can move relative to the fixed portion 21 under the action of the driving element 24. Preferably, the area of the coil and the electromagnet of the magnetic attraction component 232A is larger than that of the self-locking element 231, so that the magnetic field generated by the coil and the electromagnet of the magnetic attraction component 232A covers the whole self-locking element 231, and the self-locking element 231 can be attracted by the magnetic attraction component 232A.

Fig. 6 illustrates a schematic perspective exploded view of yet another variant implementation of the drive assembly 20 according to an embodiment of the present application. Unlike the above-described embodiment, in this modified embodiment, the self-locking element 231 includes a first plate material and a second plate material stacked on each other, the first plate material having a thermal expansion coefficient greater than that of the second plate material; wherein, the self-locking assembly 23 further comprises at least one connecting band 232B extending between the self-locking element 231 and the fixing portion 21. Accordingly, in the non-conductive state, the first plate having a higher thermal expansion coefficient warps the second plate having a smaller thermal expansion coefficient, so that the self-locking element 231 deforms in a direction approaching the movable portion 22 and is embedded in the groove 221.

More specifically, in this variant embodiment, the self-locking assembly 23 includes a self-locking element 231 and at least one connecting band 232B, wherein the self-locking element 231 is a composite plate having two plates (i.e., the first plate and the second plate), the composite plate has two different thermal expansion coefficients, and the material of the self-locking element 231 includes, but is not limited to, memory metal, copper alloy, stainless steel, and the like. In this modified embodiment, the self-locking element 231 is disposed on the side wall of the base 211, where the connecting strips 232B are disposed at the upper and lower ends of the self-locking element 231, the connecting strips 232B may be made of soft board, two ends of the connecting strips 232B are disposed on the fixing portion 21, and a groove 221 is disposed on one outer side of the movable portion 22, preferably, the groove 221 and the self-locking element 231 have a shape and a size that are adapted, for example, the width of the groove 221 is equal to the width of the self-locking element 231, and the length of the self-locking element 231 is slightly smaller than the length of the groove 221.

Accordingly, when the power is not applied, the material portion with a large thermal expansion coefficient of the self-locking element 231 will drive the material portion with a small thermal expansion coefficient to warp inwards, the self-locking element 231 will bend towards the material portion with a small thermal expansion coefficient, and the middle section of the self-locking element 231 is engaged with the groove 221, so that the friction force between the two is utilized to limit the movement of the movable portion 22, thereby realizing the function of limiting the motor rotor and also realizing the power-off self-locking function. When the power is on, the self-locking element 231 is made of a composite plate with two plates, so that the strength of the self-locking element 231 is improved, and the self-locking element 231 returns to a straightened state due to the elasticity of the self-locking element and has a certain clearance with the groove 221, so that the movable part 22 can normally move and work.

Fig. 7 illustrates a schematic perspective exploded view of yet another variant implementation of the drive assembly 20 according to an embodiment of the present application. Unlike the above-described embodiment, in this variant embodiment, the self-locking element 231 is made of memory metal, wherein the self-locking assembly 23 further comprises at least one connecting strip 232B extending between the self-locking element 231 and the fixed portion 21; wherein in the on state, the self-locking element 231 is turned on to be tensioned in a direction away from the movable portion 22 so that there is a gap between the self-locking element 231 and the movable portion 22; in the non-conductive state, the self-locking element 231 is stretched in a direction approaching the movable portion 22 and is fitted into the recess 221.

More specifically, in this variant embodiment, the self-locking element 231 is a composite plate made of a memory metal material, wherein the self-locking element 231 is capable of deforming with a temperature change. Accordingly, the self-locking element 231 is disposed in the groove 221 of the movable portion 22, wherein the connecting strips 232B are disposed at the upper and lower ends of the self-locking element 231, the connecting strips 232B may be made of soft board, and the two ends of the connecting strips 232B are disposed at the fixed portion 21. In particular, in this modified embodiment, a groove 221 is disposed at each of two ends of one outer side of the movable portion 22, wherein the width of the groove 221 is the same as the width of the self-locking element 231, the inner side of the groove 221 is in an arc shape, and the arc and the circular through hole of the lens mounting cavity 220 of the movable portion 22 are concentric.

Accordingly, by utilizing the thermal shrinkage and cold expansion characteristics of the memory metal, when the power is on, the self-locking element 231 is tensioned, so that a certain gap exists between the self-locking element 231 and the groove 221 of the movable part 22, and the movable part 22 can normally move and work. When the power is not applied, the self-locking element 231 stretches, so that the self-locking element 231 warps outwards, at this time, the self-locking element 231 is in a bending state, and two ends of the self-locking element 231 are embedded with the circular arcs of the pair of grooves 221 of the movable part 22, so that the movement of the movable part 22 due to inertia is limited by using the friction force between the two ends, and the motor rotor limiting function and the power-off self-locking function are realized.

Fig. 8 illustrates a schematic perspective exploded view of yet another variant implementation of the drive assembly 20 according to an embodiment of the present application. In this variant embodiment, as shown in fig. 8, the self-locking assembly 23 includes at least one self-locking element 231 and at least one connecting strap 232B, the self-locking element 231 is made of a composite plate material containing memory metal, and the self-locking element 231 can deform along with temperature change.

In this modified embodiment, the self-locking element 231 is disposed in the groove 221 of the movable portion 22, where the connecting band 232B is disposed at an upper end of the self-locking element 231, the connecting band 232B may be made of a soft plate, and an upper end of the connecting band 232B is connected to the fixed portion 21. In particular, in this modified embodiment, the self-locking assembly 23 includes a pair of the self-locking elements 231, wherein the pair of self-locking elements 231 are disposed side by side on both ends of one side outer side of the movable portion 22, and the upper end heads of the self-locking elements 231 are in a bent state of a certain angle. A groove 221 is provided at each of both ends of the movable portion 22 on the outer side of one side, the inner side of the groove 221 and the upper end head portion of the self-locking element 231 are in the same curved state, and the width of the groove 221 is the same as the width of the self-locking element 231.

Under the above configuration, by utilizing the thermal shrinkage and expansion characteristics of the memory metal, the self-locking element 231 is tensioned when the power is supplied, and the self-locking element 231 is nearly parallel to the bending portion of the groove 221 of the movable portion 22 and has a certain gap therebetween, so that the movable portion 22 can normally move and work. Accordingly, when the power is not applied, the self-locking element 231 stretches, so that the self-locking element 231 warps outwards, the self-locking element 231 is in a bending state, and the upper end head of the self-locking element 231 is attached to the bending part of the groove 221 of the movable part 22, so that the movable part 22 is limited to move due to inertia by using the friction force between the two parts, and the power-off self-locking function is realized since the motor rotor limiting function is realized.

It should be noted that in the modified embodiment illustrated in fig. 6 to 8, the self-locking function of the self-locking component 23 is configured based on the principle that the material of which the self-locking element 231 is made is deformed due to temperature change, and it should be understood that, as illustrated in fig. 6 to 8, only three embodiments are illustrated, and it should be understood that in other modified embodiments, other embodiments may be configured based on the principle that the material of which the self-locking element 231 is made is deformed due to temperature change, which is not limited to this application.

Fig. 9 illustrates a schematic perspective exploded view of yet another variant implementation of the drive assembly 20 according to an embodiment of the present application. It should be noted that in the example illustrated in fig. 2 to 8, the self-locking member 23 is provided between the outer peripheral surface of the movable portion 22 and the base 211, for example, the self-locking element 231 of the self-locking member 23 is provided to the side wall of the base 211, or the self-locking element 231 of the self-locking member 23 is provided to the recess 221 of the movable portion 22, but in the modified embodiment illustrated in fig. 9, the setting position of the self-locking member 23 is changed.

Specifically, as shown in fig. 9, in this modified embodiment, a self-locking element 231 of the self-locking assembly 23 is provided between the upper end surface of the movable portion 22 and the outer case 212, for example, in the example illustrated in fig. 9, the self-locking assembly 23 is provided between the fixed portion 21 and the dome structure 25. It should be understood that the embodiment of the self-locking assembly 23 illustrated in fig. 2 to 8 can be applied to the modified embodiment illustrated in fig. 9, and is not further developed here to avoid redundancy.

It should be noted that, although in the above embodiment and the modified embodiment, the friction force between the self-locking element 231 of the self-locking assembly 23 and the movable portion 22 is used as the acting force for self-locking the movable portion 22. It will be appreciated that in other examples of the present application, the further movement of the movable part 22 due to inertia may also be prevented by other forces of the self-locking assembly 23. For example, in another embodiment of the present application, the self-locking component 23 may be disposed on the movable portion 22, for example, the self-locking element 231 is suspended on the movable portion 22 by a connecting wire, so that when the self-locking component 23 is in an operating state, the self-locking component 23 does not obstruct the movement of the movable portion 22 because the self-locking component 23 is disposed on the movable portion 22, and when the self-locking component 23 is in a non-operating state, the self-locking element 231 is abutted against the fixed portion 21, for example, against the base 211 of the fixed portion 21, by the self-elastic force of the connecting wire or the self-locking element 231, so that the connecting wire is tensioned to generate a tensile force for obstructing the movement of the movable portion 22. That is, in this embodiment, the force for preventing the movable portion 22 from continuing to move due to inertia is the pulling force provided by the connecting wire. Specifically, in some examples, the connection line may be the SMA wire 232 or the connection strap 232B, which is not limited in this application.

It should be noted that, although the self-locking assembly 23 is applied to the upright camera module in the embodiment of the present application, it should be understood that the self-locking assembly may be applied to other types of camera modules, such as a periscope camera module with an optical zoom function, in other examples of the present application. Accordingly, when the camera module is a periscope camera module having an optical zoom function, the optical lens of the periscope camera module includes a fixed portion, a zoom portion, and a focusing portion, wherein the zoom portion and the focusing portion need to be moved, and likewise, when the periscope camera module is switched from an operating state to a non-operating state, the zoom portion and the focusing portion may continue to move due to inertia, thereby resulting in the generation of dirt. Accordingly, in the application scenario of the periscope type camera module, the self-locking assembly 23 may also be applied, in particular, it may be disposed between the focusing portion and the fixing portion, and/or between the zooming portion and the fixing portion.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.

Claims (18)

1. A drive assembly, comprising: .

A fixing part;

a movable portion, wherein the movable portion is adapted to mount an optical lens therein;

a driving element for driving the movable portion to move relative to the fixed portion; and

the self-locking assembly comprises at least one self-locking element arranged between the fixed part and the movable part, and the self-locking element is configured to work in a switchable manner in a conducting state and a non-conducting state;

in the on state, the driving element is suitable for driving the movable part to move relative to the fixed part, and the self-locking element is suitable for being deformed so that a gap is formed between the self-locking element and the movable part;

in the non-conducting state, the self-locking element is suitable for being deformed so that the self-locking element is abutted against the movable part.

2. The drive assembly of claim 1, wherein in the non-conductive state, the self-locking element is adapted to deform in a direction toward the movable portion to interfere with the movable portion.

3. The drive assembly of claim 1, wherein in the non-conductive state, the self-locking element is adapted to deform in a direction approaching the fixed portion to abut against the fixed portion, and the other end of the self-locking element opposite to the end abutting against the fixed portion abuts against the movable portion.

4. A drive assembly according to claim 3, wherein the self-locking element is provided to the movable portion, wherein the self-locking assembly comprises a connecting line extending between the self-locking element and the movable portion.

5. The drive assembly of claim 2, wherein the stationary portion comprises a base and an outer housing, the movable portion being movably coupled to the base, the movable portion and the base being enclosed within the outer housing.

6. The drive assembly of claim 5, further comprising a spring structure that is interposed between the movable portion and the base such that the movable portion is suspended from the base by the spring structure.

7. The drive assembly according to claim 5, wherein the self-locking element is provided between an upper end face of the movable portion and the outer housing.

8. The drive assembly according to claim 5, wherein the self-locking element is provided between an outer peripheral surface of the movable portion and the base.

9. The drive assembly of claim 8, wherein the movable portion has at least one recess concavely formed in an outer peripheral surface thereof, wherein in the non-conductive state, the self-locking element is adapted to deform to approach and fit within the recess.

10. The drive assembly of claim 9, wherein the self-locking assembly further comprises at least one SMA wire extending between the self-locking element and the fixed portion, such that the self-locking element is suspended between the movable portion and the fixed portion by the at least one SMA wire;

in the on state, the at least one SMA wire is conducted and pulls the self-locking element to deform in a direction away from the movable part so that a gap exists between the self-locking element and the movable part;

and in the non-conducting state, the self-locking element deforms in a direction approaching to the movable part and is embedded in the groove.

11. The drive assembly of claim 10, wherein the at least one SMA wire comprises a first SMA wire extending from a first end of the self-locking element to the fixed portion and a second SMA wire extending from a second end of the self-locking element opposite the first end to the fixed portion.

12. The drive assembly of claim 11, wherein in the non-conductive state, a central region of the self-locking element conforms to the recess, wherein a width dimension of the self-locking element is equal to a width dimension of the recess.

13. The drive assembly of claim 11, wherein the at least one recess comprises a first recess corresponding to a first end of the self-locking element and a second recess corresponding to a second end of the self-locking element, wherein in the non-conductive state the first end of the self-locking element engages the first recess and the second end of the self-locking element engages the second recess, wherein the inner surfaces of the first and second recesses are arcuate surfaces.

14. The drive assembly of claim 9, wherein the at least one groove comprises a first groove and a second groove formed at two opposite ends of a side of an outer peripheral surface of the movable portion, the at least one self-locking element comprising a first self-locking element corresponding to the first groove and a second self-locking element corresponding to the second groove, wherein the self-locking assembly further comprises a first SMA wire extending between the first self-locking element and the fixed portion and a second SMA wire extending between the second self-locking element and the fixed portion;

in the on state, the first SMA wire and the second SMA wire pull the first self-locking element and the second self-locking element respectively to deform in a direction away from the movable part, so that gaps are formed between the first self-locking element and the movable part and between the second self-locking element and the movable part;

In the non-conducting state, the first self-locking element and the second self-locking element deform in a direction approaching to the movable part and are respectively embedded in the first groove and the second groove.

15. The drive assembly of claim 14, wherein the first self-locking element comprises a first self-locking body and a first self-locking head extending obliquely from the first self-locking body, and the second self-locking element comprises a second self-locking body and a second self-locking head extending obliquely from the second self-locking body, wherein the first and second grooves are of a shape and size that are adapted to the first and second self-locking elements.

16. The drive assembly of claim 9, wherein the self-locking element comprises a first plate and a second plate stacked on top of each other, the first plate having a coefficient of thermal expansion greater than a coefficient of thermal expansion of the second plate; wherein the self-locking assembly further comprises at least one connecting strap extending between the self-locking element and the fixing portion;

under the non-conduction state, the first plate with the higher thermal expansion coefficient drives the second plate with the smaller thermal expansion coefficient to warp so that the self-locking element deforms in the direction close to the movable part and is embedded in the groove.

17. The drive assembly of claim 9, wherein the self-locking element is made of a memory metal, wherein the self-locking assembly further comprises at least one connecting strap extending between the self-locking element and the fixed portion;

wherein in the on state, the self-locking element is turned on to be tensioned in a direction away from the movable portion so that there is a gap between the self-locking element and the movable portion;

in the non-conducting state, the self-locking element stretches in a direction approaching to the movable part and is embedded in the groove.

18. A camera module, comprising:

a photosensitive assembly;

a drive assembly according to any one of claims 1 to 17 mounted on the photosensitive assembly;

an optical lens, wherein the optical lens is held on a photosensitive path of the photosensitive assembly in such a manner as to be mounted in a movable portion of the driving assembly.

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