Driving module, camera module, and electronic device

Abstract

A driving module, a camera module (110), and an electronic device (100). The driving module comprises a fixed member (310), a movable member (320), a resonator (340) and a driven member (330). The fixed member (310) comprises a first mounting hole (311); the movable member (320) is used for carrying an optical element and is arranged in the first mounting hole (311); the resonator (340) is used for driving the driven member (330) to reciprocate in a first direction relative to the fixed member (310); and when the driven member (330) reciprocates in the first direction relative to the fixed member (310), the driven member (330) transmits the movement of the driven member (330) in the first direction to the movable member (320) by means of a transmission structure (322), so as to drive the movable member (320) to reciprocate in the first direction, which can improve the stability of the movement of the movable member (320).

Description

Drive modules, camera modules and electronic devices

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 22, 2023, with application number 202311795816.3 and application name “Drive module, camera module and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of electronic technology, and more specifically, to a driving module, a camera module and an electronic device. Background Art

[0003] With the continuous development of electronic device technology, the shooting function has become an indispensable function of electronic devices (such as mobile phones, tablet computers, etc.).

[0004] To meet the need for long-stroke drive, piezoelectric camera module motors are used. Piezoelectric drives achieve energy transfer through the high-frequency vibration of a vibrating body and the pre-compression friction between the vibrating body and the contact object (such as the moving parts in the camera module), thereby causing the contact object to achieve linear or rotational motion.

[0005] However, the pre-stress is involved in the force system of the moving parts in the camera module. Asymmetric and unstable pre-stress throughout the entire stroke may cause the moving parts to jam or tilt when moving.

[0006] Summary of the Invention

[0007] The present application provides a driving module, a camera module and an electronic device, which can improve the motion stability of movable parts in a camera module.

[0008] In a first aspect, a driving module is provided, comprising: a fixed part, a movable part, a resonator and a driven part; wherein the fixed part comprises a first mounting hole; the movable part is used to carry an optical element and is arranged in the first mounting hole; the pre-pressed part is used to cooperate with the resonator to drive the driven part to reciprocate along a first direction relative to the fixed part; when the driven part reciprocates along the first direction relative to the fixed part, the driven part transmits the movement of the follower along the first direction to the movable part through a transmission structure, thereby driving the movable part to reciprocate along the first direction.

[0009] In this embodiment, because the preload of the oscillator is applied to the follower rather than directly acting on the movable member, the movable member is driven by the follower to move in the first direction, and the follower only transmits the follower's movement in the first direction through the transmission structure. Therefore, when the follower experiences certain disturbances in other directions due to uneven preload or environmental vibration, the movement of the movable member is not easily affected and can always move in the first direction, making the movement of the movable member more stable. Because the optical element carried by the movable member has high requirements for fine control of movement, the technical solution provided in the embodiment of the present application can make the movement of the movable member carrying the optical element more stable, meeting the requirements for fine control of the position or distance of the optical element.

[0010] In combination with the first aspect, in some implementations of the first aspect, the transmission structure includes a first limiting portion and a second limiting portion sequentially arranged along the first direction, the first limiting portion is arranged on the movable part, and the second limiting portion is arranged on the follower, the first limiting portion and the second limiting portion respectively include a first surface and a second surface relative to each other, and there is a magnetic attraction between the first limiting portion and the second limiting portion. When the follower drives the movable part to reciprocate along the first direction, the first surface and the second surface contact each other.

[0011] The first surface and the second surface may be planes perpendicular to the first direction. The two opposing first and second surfaces of the first and second limiting portions may be brought into contact with each other due to magnetic attraction. When the direction of movement of the follower causes the first and second surfaces to separate from each other, the two surfaces may still be brought into contact with each other due to the magnetic attraction, thereby driving the movable member to move accordingly through the magnetic attraction. When the direction of movement of the follower causes the first and second surfaces to approach each other, the follower may push the movable member to move in the first direction through the pressure of the contacting surfaces of the two limiting portions.

[0012] In combination with the first aspect, in some implementations of the first aspect, the movable part is used to move from the first position to the second position along the first direction under the action of the pop-up pressing back mechanism, so that the first surface of the first limiting part and the second surface of the second limiting part change from a separated state to a contact state, so that the transmission structure can transmit the movement of the follower along the first direction to the movable part; or, the movable part is used to move from the second position to the first position along the first direction under the action of the pop-up pressing back mechanism, so that the first surface of the first limiting part and the second surface of the second limiting part change from a contact state to a separated state, so that the transmission structure cannot transmit the movement of the follower along the first direction to the movable part.

[0013] In combination with the first aspect, in some implementations of the first aspect, the pop-up pressing mechanism includes a locking component and a pop-up component, the locking component contacts the movable part, and the pop-up component includes a first magnetic attraction component or a first elastic component; the locking component is used to move from the third position to the fourth position along the first direction, so that the movable part can move from the first position to the second position under the action of the pop-up component; or, the locking component is used to move from the fourth position to the third position along the first direction, so that the movable part can move from the second position to the first position along the first direction under the action of the pop-up component.

[0014] The first elastic component can be an elastic component such as a spring or a reed, and can be in a force-storing state. In the initial state, the two limiting portions can separate along a first direction. When fine control of the position of the movable member is required, the locking device can release the elastic component, causing the movable member to move toward the follower along the first direction. As a result, the first and second surfaces of the two limiting portions change from a separated state to a contacted state. Subsequently, the position of the movable member can be finely controlled by controlling the resonator.

[0015] In an embodiment of the present application, the first elastic component can be fixed at only one end and the other end is a free end, and after being released so that the first surface and the second surface of the movable part and the follower come into contact, the first elastic component is in a free state without storing force, so that the subsequent movement of the movable part driven by the follower will no longer be affected by the first elastic component.

[0016] The first magnetic component can be at least a pair of magnetic components arranged on the movable part and the fixed part. When the locking device moves, the movable part can follow the locking device under the action of the first magnetic component, thereby separating or contacting the movable part and the driven part.

[0017] Alternatively, the ejection and retraction mechanism may include only a first magnetic component, such as an electromagnet, with one of the first magnetic components disposed on each of the fixed member and the movable member. When precise control of the position of the movable member is required, the electromagnet may be energized to cause the movable member to move in the first direction, causing the two stoppers to move from a separated state to a contacted state.

[0018] In combination with the first aspect, in some implementations of the first aspect, the driving module further includes a pre-pressing member, which is used to provide pre-pressure to the resonator, and the resonator is used to drive the follower to reciprocate along the first direction under the action of the pre-pressure.

[0019] The preload element can provide the preload required for the resonator to generate friction.

[0020] In some implementations, the pre-compression member may not be provided separately. For example, the structure of the fixing member or the driven member may be designed so that the fixing member or the driven member can provide pre-compression to the resonator.

[0021] In combination with the first aspect, in some implementations of the first aspect, the movable part reciprocates along the first direction through a first guide structure, the first guide structure includes a first guide shaft and a first groove cooperating with the first guide shaft, the first guide shaft and the first groove are respectively arranged on the fixed part and the movable part and extend along the first direction.

[0022] The first groove may be, for example, a V-shaped groove, or a groove of other shapes, and is used to guide the movement direction of the movable part.

[0023] The first guide structure can also be a guide rail-sliding connector combination, a guide shaft-sleeve combination or any other form of guide structure. The sliding connector can be a ball, a slider, etc., which is not limited in this application.

[0024] In combination with the first aspect, in some implementations of the first aspect, the first guide structure includes a second guide shaft and a guide portion, and the second guide shaft and the guide portion are respectively arranged on the fixed part and the movable part and extend along the first direction.

[0025] The cooperation between the guide portion and the second guide shaft can prevent the movable part from rotating around the first guide shaft when moving along the first direction, thereby making the movement of the movable part more stable.

[0026] In combination with the first aspect, in some implementations of the first aspect, the driving module includes a second magnetic attraction component, and the second magnetic attraction component is used to make the first guide shaft and the first groove abut against each other.

[0027] The second magnetic assembly enables the movable part to generate a clamping force with the first guide shaft during movement, ensuring that the movable part maintains contact between the first guide shaft and the first groove during reciprocating motion in the first direction, thereby achieving strict guidance in the first direction. If the drive module is subjected to external forces such as being dropped, the movable part may temporarily deviate perpendicular to the first direction, but this clamping force will quickly return it to its original position, enhancing the reliability of the entire drive module.

[0028] In combination with the first aspect, in some implementations of the first aspect, the follower reciprocates relative to the fixed member along the first direction through a second guide structure, and the second guide structure includes a first groove body provided on the follower, a second groove body provided on the fixed member, and a sliding connection member, the first groove body and the second groove body are arranged relative to each other and constitute a receiving groove for accommodating the sliding connection member, and the receiving groove extends along the first direction.

[0029] The sliding connection member may be a ball or a slider. When the second guide structure is a ball, the resistance to the movement of the follower can be reduced, making the movement of the follower smoother.

[0030] In combination with the first aspect, in some implementations of the first aspect, the sliding connection member is a ball.

[0031] In combination with the first aspect, in some implementations of the first aspect, the driving module further includes a friction member, the resonator is a fixed member, the friction member is a moving member, and when the resonator vibrates, the friction force between the resonator and the friction member drives the driven member to reciprocate along the first direction.

[0032] The resonator being a fixed part means that the resonator will not move relative to the fixed part. The resonator can be directly connected to the fixed part, or when a pre-pressed part is additionally provided in the driving module and the pre-pressed part is also a fixed part, the resonator can be fixed on the pre-pressed part, and the pre-pressed part is fixed on the fixed part.

[0033] When a pre-pressing member is additionally provided in the driving module, the friction member can be provided on the pre-pressing member or the driven member.

[0034] The friction member may be a separate component fixedly connected to the pre-pressing member or the driven member, or the friction member may be a part of the pre-pressing member or the driven member.

[0035] When the friction member is a separate component, the resonator can directly drive the friction member to move: in one embodiment, the friction member can be directly connected to the driven member, thereby driving the driven member to move; in another embodiment, the friction member can be connected to the pre-pressing member, and the pre-pressing member can be connected to the driven member, so that the friction member can drive the driven member to move through the pre-pressing member. In this case, the pre-pressing member and the driven member can be integrated into one component. For example, the pre-pressing member can act as a driven member to directly drive the movable member to move along the first direction.

[0036] When the friction member is part of the pre-load member or the driven member: in one embodiment, the resonator directly drives the driven member to move through the friction member provided on the driven member; in another embodiment, the resonator directly drives the pre-load member to move through the friction member, the pre-load member and the driven member are connected, and the driven member also moves accordingly.

[0037] In combination with the first aspect, in some implementations of the first aspect, the resonator is a fixed part, the resonator is fixed on the fixed part through the pre-pressed part, and the resonator is used to drive the follower to reciprocate along the first direction through the friction force between the resonator and the follower.

[0038] In combination with the first aspect, in some implementations of the first aspect, the driving module further includes a friction member, the resonator is a moving member, the friction member is fixed to the fixed member, and when the resonator vibrates, the friction force between the resonator and the friction member drives the resonator and the driven member to reciprocate along the first direction.

[0039] The resonator driving the follower to move along the first direction may mean that the resonator is directly connected to the follower and drives the follower to move; or when the driving module includes a pre-pressed part, the resonator is directly connected to the pre-pressed part, and the pre-pressed part is connected to the follower, so that the resonator can indirectly drive the follower to move.

[0040] Fixing the friction part and the fixed part may mean that the friction part is directly fixed to the fixed part. When the driving module is provided with a pre-pressing part and the pre-pressing part is also a fixed part, the friction part may also be directly fixed to the pre-pressing part, and the pre-pressing part is fixed to the fixed part.

[0041] In combination with the first aspect, in some implementations of the first aspect, the friction member is fixed to the fixing member, and the resonator and the driven member are fixedly connected.

[0042] In combination with the first aspect, in some implementations of the first aspect, the transmission structure includes a third limiting part, a fourth limiting part, a fifth limiting part and a second elastic component, the third limiting part and the fourth limiting part are arranged on the movable part, the fifth limiting part is arranged on the follower, the fifth limiting part is located between the third limiting part and the fourth limiting part along the first direction, the third limiting part and the fifth limiting part respectively include a third surface and a fourth surface arranged opposite to each other, and a second elastic component is included between the fifth limiting part and the fourth limiting part.

[0043] The third surface and the fourth surface may be planes perpendicular to the first direction. When the movement of the follower tends to make the fifth limiting portion approach the third limiting portion, the follower may push the movable member to perform corresponding movement through the third surface and the fourth surface.

[0044] When the movement of the follower tends to make the fifth limiting part approach the fourth limiting part, the follower can push the movable part to perform corresponding movement through the second elastic component. The second elastic component can be an elastic component such as a spring, a metal spring, etc. The second elastic component can be in a force storage state, so that even if the follower has only a small displacement, the movable part can perform corresponding displacement without delay.

[0045] In some embodiments, one limiting portion may be provided on the movable member and two limiting portions may be provided on the driven member. For specific details, reference may be made to the case where two limiting portions are provided on the movable member and one limiting portion is provided on the driven member.

[0046] In combination with the first aspect, in some implementations of the first aspect, the transmission structure includes a third limiting part, a fourth limiting part and a fifth limiting part, the third limiting part and the fourth limiting part are arranged on the movable part, the fifth limiting part is arranged on the follower, the fifth limiting part is located between the third limiting part and the fourth limiting part along the first direction, and the fifth limiting part abuts against the third limiting part and the fourth limiting part respectively.

[0047] The length of the fifth limiting portion along the first direction may be in an interference fit state relative to the distance between the third limiting portion and the fourth limiting portion along the first direction. When the follower member moves in different directions along the first direction, the contact surface between the fifth limiting portion and the fourth limiting portion or the contact surface between the fifth limiting portion and the third limiting portion may push the movable member to move accordingly.

[0048] Since the three limiting parts are in an interference fit state, even if the follower has a certain position disturbance along the direction perpendicular to the first direction, the friction between the fifth limiting part and the third limiting part or the fourth limiting part is relatively small, so that the movable part will not deviate from the first direction, thereby making the movement of the movable part smoother.

[0049] In combination with the first aspect, in some implementations of the first aspect, the transmission structure includes a third limiting part, a fourth limiting part, a fifth limiting part and a ball, the third limiting part and the fourth limiting part are arranged on the movable part, the fifth limiting part is arranged on the follower, the fifth limiting part is located between the third limiting part and the fourth limiting part along the first direction, the third limiting part and the fifth limiting part respectively include a third surface and a fourth surface arranged opposite to each other, and a ball is included between the fifth limiting part and the fourth limiting part.

[0050] In combination with the first aspect, in some implementations of the first aspect, the movable part is used to support an optical element, and the optical element includes a lens, or the optical element includes a lens and an aperture.

[0051] In combination with the first aspect, in some implementations of the first aspect, the movable part is used to support an optical element, and the first direction is an axial direction of the first mounting hole.

[0052] The axial direction of the first mounting hole may be the optical axis direction of the optical element carried by the movable member.

[0053] The first direction is the optical axis direction of the optical element, which enables operations such as fine focusing.

[0054] In some embodiments, the first direction may also be a direction perpendicular to the optical axis of the optical element, thereby facilitating operations such as anti-shake.

[0055] In a second aspect, a camera module is provided, comprising an optical element and a driving module as described in the first aspect or any one of the implementations of the first aspect, wherein the movable part is used to support the optical element.

[0056] In a third aspect, an electronic device is provided, comprising the driving module as described in the first aspect or any one implementation manner of the first aspect, or the camera module as described in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] FIG1 is a schematic structural diagram of an electronic device applicable to an embodiment of the present application.

[0058] FIG2 is a schematic structural diagram of a camera module.

[0059] FIG3 is a schematic structural diagram of a driving module provided in an embodiment of the present application.

[0060] FIG4 is a cross-sectional view of the driving module shown in FIG3 along the BB section.

[0061] FIG5 is a schematic diagram of a transmission structure provided in an embodiment of the present application.

[0062] FIG6 is a schematic diagram of the structure of a resonator provided in an embodiment of the present application.

[0063] FIG7 is a schematic structural diagram of another resonator provided in an embodiment of the present application.

[0064] FIG8 is a structural diagram of the connection relationship between the pre-compression member, the resonator, and the driven member provided in an embodiment of the present application.

[0065] FIG9 is a structural diagram of the connection relationship between the pre-compression member, the resonator, and the driven member provided in an embodiment of the present application.

[0066] FIG10 is a schematic structural diagram of a driving module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0067] The technical solutions in this application will be described below in conjunction with the accompanying drawings. In the description of the embodiments of this application, unless otherwise specified, " / " represents or. For example, A / B can represent A or B. "And / or" in this article is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0068] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this embodiment, unless otherwise specified, "plurality" means two or more.

[0069] FIG1 is a schematic diagram of the structure of an electronic device 100 applicable to an embodiment of the present application. The electronic device 100 can be an electronic device with a video or photo recording function, such as a mobile phone, a tablet computer, a television (or smart screen), a laptop computer, a video camera, a video recorder, a still camera, etc. For ease of understanding, the present embodiment of the application is described using the example of the electronic device 100 being a mobile phone.

[0070] Electronic device 100 may include a display screen 10 and a housing. The housing may include a frame and a back cover 20. The frame may surround the periphery of display screen 10, and the frame may surround the periphery of back cover 20. There may be a certain distance between display screen 10 and back cover 20. Display screen 10 may be arranged parallel to back cover 20.

[0071] A front camera module (CCM) 110 may be provided on the display screen 10 of the electronic device 100. As shown in the left figure of FIG1 , the front camera module 110 may be installed at the upper left portion of the display screen 10. The front camera module 110 may be used, for example, for taking selfies.

[0072] A rear camera module 120 may be provided on the rear cover 20 of the electronic device 100. As shown in the right figure in FIG1 , the rear camera module 120 may be installed on the upper left portion of the rear cover 20. The rear camera module 120 may be used to capture the surrounding scene of the electronic device 100, for example.

[0073] It should be understood that the installation positions of the front camera module 110 and the rear camera module 120 shown in FIG1 are merely schematic, and the present application does not limit the installation positions of the camera modules. In some other embodiments, the front camera module 110 and the rear camera module 120 may also be installed at other positions on the electronic device 100. For example, the front camera module 110 may be installed in the upper middle portion or the upper right portion of the display screen 10. For another example, the rear camera module 120 may be installed in the upper middle portion or the upper right portion of the back cover 20. For another example, the front camera module 110 or the rear camera module 120 may be set on a movable component in the electronic device 100. By moving the movable component, the movable component can be hidden in the electronic device 100, or can be extended outside the electronic device 100.

[0074] It should be understood that the number of front camera modules 110 and rear camera modules 120 shown in FIG1 is merely illustrative, and the present application does not limit the number of camera modules. The electronic device 100 may include more or fewer camera modules.

[0075] FIG2 is a structural schematic diagram of a camera module provided in an embodiment of the present application. The camera module may be the front camera module 110 or the rear camera module 120 of the electronic device shown in FIG1 . The camera module may include a drive module 210, a lens 220, and an image sensor 230. The camera module may also include a filter, a circuit board, a bracket, etc., which are not shown in FIG2 . Among them, after passing through the protective cover of the camera module of the electronic device and the light-through hole of the decorative part, the external light can pass through the lens 220 to reach the image sensor 230.

[0076] The lens 220 may include a convex lens and / or a concave lens, and is mainly used to change the propagation path of light and converge external light to facilitate imaging. The lens 220 may be made of glass or plastic.

[0077] The image sensor 230 can be a sensor such as a charge coupled device (CCD) or a sensor such as a complementary metal oxide semiconductor (CMOS). Among them, for sensors such as CMOS, it can be based on RGGB or RYYB. Furthermore, the image sensor 230 can be mainly used to receive light from the lens 220 and convert the light signal into an electrical signal to facilitate the imaging requirements of the camera module. At this time, the image sensor 230 can be arranged opposite to the lens 220 in the direction of the optical axis of the lens 220.

[0078] The driving module 210 can be a motor for carrying the lens 220 and configured to drive the lens 220 so as to facilitate the driving module 210 to achieve the focusing, anti-shake, zoom and other requirements of the lens 220, thereby improving the imaging effect of the camera module.

[0079] It should be noted that the driving module 210 of the embodiment of the present application can realize one or a combination of functions of the camera module, such as autofocus (AF) and optical image stabilization (OIS).

[0080] Autofocus utilizes the principles of lens imaging and light reflection to create an image on the image sensor after light reflected from the subject passes through a lens array. By moving one or more lenses in the lens array according to the object distance, a clear image can be formed on the image sensor. Autofocus can be simply thought of as the movement of the lens array or lenses along the optical axis.

[0081] Optical image stabilization (OIS) can reduce instrument jitter during optical signal capture by adjusting the angle and position of the lens array, thereby improving image quality. One possible approach is to use a gyroscope, for example, to detect the displacement or angle to be compensated, and then use a motor to translate or rotate the lens array to compensate for image blur caused by imaging device jitter during exposure. Optical image stabilization can be simply thought of as the translation or rotation of the lens array in a plane perpendicular to the optical axis.

[0082] The embodiments of the present application are mainly described by taking the example of a driving module to realize autofocus.

[0083] FIG3 is a schematic structural diagram of a driving module provided in an embodiment of the present application. As shown in FIG3 , the driving module includes: a fixed member 310, a movable member 320, a driven member 330, a resonator 340, and a pre-pressing member 350. The fixed member 310 includes a first mounting hole 311; the movable member 320 is used to support the optical element, and the movable member 320 is arranged in the first mounting hole 311; the pre-pressing member 350 is used to cooperate with the resonator 340 to drive the driven member 330 to reciprocate along the first direction relative to the fixed member 310; when the driven member 330 reciprocates along the first direction relative to the fixed member 310, the driven member transmits the movement of the driven member 330 along the first direction to the movable member 320 through the transmission structure 322, thereby driving the movable member 320 to reciprocate along the first direction.

[0084] Because the transmission structure in the drive module provided in this embodiment of the application transmits the motion of the driven member 330 along the first direction, motion in other directions is not transmitted to the movable member 320. This improves the stability of the motion of the movable member 320 along the first direction. Furthermore, this embodiment of the application utilizes a piezoelectric drive mechanism, resulting in a large drive stroke. Compared to voice coil motors, this reduces motion instability and inaccuracy caused by magnetic interference.

[0085] When the driving module is used to achieve autofocus, the first direction may be the optical axis direction of the optical element carried by the movable member 320 (the x-axis direction in FIG. 3 , which is also the axial direction of the first mounting hole).

[0086] The fixing member 310 may include a bracket or a base, or may include other fixed members (parts whose position does not change) disposed on the bracket or base, and may be a structural member whose position does not change in the entire drive module. The fixing member 310 may have a square, rectangular, circular, or other shaped structure, and is illustrated as a rounded square in FIG3 . The first mounting hole 311 may be a through hole or a blind hole for accommodating the movable member 320. The axis of the first mounting hole 311 may coincide with the optical axis of the optical element supported by the movable member 320.

[0087] The optical element carried by the movable member 320 may be a lens, which may be a single lens or multiple lenses. Alternatively, the optical element carried by the movable member 320 may be a lens and an aperture. When the movable member 320 carries more than one optical element, the movable member 320 may be a split structure, and the parts of the movable member 320 carrying different optical elements may be connected by different connection methods, for example, by magnetic attraction or snap connection, and the different optical elements need to move together so that the distance between the different optical elements remains constant.

[0088] The movable member 320 can reciprocate in a first direction relative to the fixed member 310 via a first guide structure. In Figure 3, the first guide structure includes two sets of guide structures. The first set of first guide structures 3211 includes a first guide shaft 3211-1 and a first groove 3211-2, and the second set of first guide structures 3212 includes a second guide shaft 3212-1 and a guide portion 3212-2. The first guide shaft 3211-1, the second guide shaft 3212-1, the first groove 3211-2, and the guide portion 3212-2 all extend in the first direction. The two guide shafts can be fixedly connected to the fixed member 310, for example, they can be integrally formed with the fixed member 310, or they can be fixed to the fixed member 310 via a threaded connection, a snap-fit ​​connection, or the like. The outer periphery of the movable member 310 can be provided with a first groove 3211-2 corresponding to the first guide shaft 3211-1 and a guide portion 3212-2 corresponding to the second guide shaft 3212-1. The first groove 3211-2 may be a V-shaped groove as shown in the figure or a groove of other shapes, such as a circular groove, a semicircular groove, etc. The second guide shaft 3212-1 may mainly play a stabilizing role. The second guide shaft 3212-1 may cooperate with the guide portion 3212-2 to prevent the entire movable member 320 from rotating around the first guide shaft 3211-1 during movement.

[0089] In one embodiment, to increase the stability of the movable member 320, the drive module may be provided with a second magnetic component, thereby causing the first guide shaft 3211-1 to abut against the first groove 3211-2. This second magnetic component may also cause the second guide shaft 3212-1 to abut against the guide portion 3212-2. For example, a magnetic component may be provided on the fixed member 310, and another magnetic component may be provided on the movable member 320. The interaction between the two magnetic components of the fixed member 310 and the movable member 320 may create a clamping force between the movable member 320 and the fixed member 310.

[0090] The acting force between the two magnetic elements may be an attractive force. For example, the two magnetic elements may be magnets with different polarities, or one of them may be a magnet and the other may be a ferromagnetic material.

[0091] The acting force between the two magnetic elements may also be a repulsive force, for example, the two magnetic elements are magnets with the same polarity.

[0092] By adjusting the positions of the first and second magnetic members, depending on the type of force acting between the magnetic components, the movable member 320 can generate a clamping force on the guide shaft of the fixed member 310, thereby smoothing the reciprocating motion of the movable member 320 along the first direction via the first guide structure. Furthermore, even if the device including this drive module is dropped, the movable member 320 can return to its initial position under the influence of the magnetic force, thereby improving the reliability of the drive module of this embodiment.

[0093] For example, when the force between the magnetic parts is attractive, the magnetic parts providing attractive force can be respectively arranged on the first guide shaft 3211-1 and the first groove 3211-2, and on the second guide shaft 3212-1 and the guide portion 3212-2, so that the first guide shaft 3211-1 abuts against the first groove 3211-2, and the second guide shaft 3212-1 abuts against the guide portion 3212-2.

[0094] For another example, when the acting force between the magnetic parts is a repulsive force, the magnetic parts providing the repulsive force can be respectively set on the side of the movable part 320 away from the guide shaft and the corresponding position of the fixed part 310, such as the position indicated by the dotted box A in Figure 3, so that the movable part 320 is pushed toward the fixed part 310 by the repulsive force between the magnetic parts.

[0095] In one embodiment, the two magnetic elements can be installed in slots pre-determined on the guide shaft and the movable member 320. In another embodiment, the guide shaft can be entirely magnetized (serving as one magnetic element), and the frame of the movable member 320 can be made of ferromagnetic material (serving as another magnetic element), thereby creating an attractive force between the movable member 320 and the guide shaft. In another embodiment, the guide shaft can be magnetized (serving as one magnetic element), and the movable member 320 has a slot for accommodating ferromagnetic material for mounting the magnetic element.

[0096] It should be understood that the form of the first guide structure and the number of guide shafts in FIG3 are merely schematic. For example, when the first guide structure is a guide shaft-groove combination, it may include fewer than or more than two guide shafts. For another example, the first guide structure may also be a slider-guide rail combination, a groove-ball bearing combination, a guide shaft-sleeve combination, etc. This application does not limit the form of the first guide structure.

[0097] The follower 330 can reciprocate in a first direction relative to the fixed member 310 via the second guide structure. In Figure 3 , the second guide structure includes two sets of guide structures. The first set of second guide structures 3311 includes a first groove 3311-1 disposed on the follower 330, a second groove 3311-2 disposed on the fixed member 310, and a first ball 3311-3. The second set of second guide structures 3312 includes a third groove 3312-1 disposed on the follower 330, a fourth groove 3312-2 disposed on the fixed member 310, and a second ball 3312-3. The first groove body 3311-1 and the second groove body 3311-2 can both be V-shaped grooves (the cross-section of the groove body is V-shaped), the third groove body 3312-1 can be a V-shaped groove, and the fourth groove body 3312-2 can be a U-shaped groove (the cross-section of the groove body is U-shaped). In this way, the first ball 3311-3 can slide smoothly and accurately in the receiving groove formed by the first groove body 3311-1 and the second groove body 3311-2, and when the second ball 3312-3 rolls in the receiving groove formed by the third groove body 3312-1 and the fourth groove body 3312-2, the disturbance in the non-X-axis direction can be fine-tuned, thereby reducing the possibility of jamming when the follower 330 drives the movable part 320 to reciprocate along the first direction.

[0098] In one embodiment, there is a magnetic attraction between the ball and the receiving groove, which facilitates the assembly of the drive module. For example, there is a magnetic attraction between the ball and the groove body set on the fixing member 310, so that when the follower 330 is assembled, the ball can be adsorbed in the groove body set on the fixing member 310.

[0099] FIG3 illustrates a second guide structure comprising two groups of guide structures. In practice, the second guide structure may include fewer or more similar groups of guide structures, that is, more or fewer balls and corresponding receiving grooves. Furthermore, the number of balls provided in each receiving groove is not limited to one; each receiving groove may include more balls. Furthermore, the sliding connectors used in the receiving grooves of the second guide structure are not limited to balls; for example, they may also be sliders. In other words, the second guide structure may be a slider-guide rail combination, a guide shaft-sleeve combination, a guide shaft-groove combination, etc., and this application does not impose any limitations on this.

[0100] The follower 330 can transmit the movement of the follower 330 along the first direction through the transmission structure 322 , so that when the follower 330 reciprocates relative to the fixed member 310 along the first direction, the transmission structure 322 can drive the movable member 320 to move along the first direction.

[0101] FIG4(a) shows a cross-sectional view of the driving module shown in FIG3 along the BB plane (XY plane). As shown in FIG4(a), the transmission structure 322 includes a first limiting portion 322-1 provided on the movable member 320 and a second limiting portion 322-2 provided on the driven member 330. The first limiting portion 322-1 and the second limiting portion 322-2 may have opposing first and second surfaces, and a magnetic attraction is generated between the first limiting portion 322-1 and the second limiting portion 322-2. Thus, when the driven member 330 moves in the positive direction of the X-axis, the second surface of the driven member 330 can push the movable member 320 in the positive direction of the X-axis via the first surface. When the driven member 330 moves in the negative direction of the X-axis, the magnetic attraction between the driven member 330 and the movable member 320 can attract the movable member 320 to move in the negative direction of the X-axis, thereby achieving the movement of the movable member 320 driven by the driven member 330. When the follower 330 drives the movable member 320 to move, the first surface and the second surface may always be in contact.

[0102] Due to machining errors, the guiding directions of the second guide structure and the first guide structure may actually be at an angle. Furthermore, due to external vibrations and other factors, the movement of the follower 330 may include not only a component along the first direction (X-axis), but also positional disturbances in the Y or Z directions. However, the transmission structure 322 provided in the embodiment of the present application allows the displacement of the follower 330 along the Y and Z directions to be absorbed (for example, the friction between the first and second contacting surfaces can be lower). Displacement of the follower 330 along the Y or Z directions does not cause displacement of the movable member 320 in the Y or Z directions, thereby improving the motion stability of the movable member 320.

[0103] In addition, the setting of the magnetic attraction between the two limiting parts can ensure that even if the two limiting parts have relative displacement in the Y direction or Z direction, the attraction between the two is always along the first direction, further improving the movement stability of the movable part 320 of the technical solution embodiment of the present application.

[0104] The transmission structure 322 shown in FIG3 may be a contact transmission, which does not cause transmission hysteresis problems. When the movable part 320 is maintained at a fixed position, no power is required. Compared with a voice coil motor drive, energy consumption can be reduced.

[0105] In addition, the transmission structure 322 may further include a blocking mechanism, as shown in FIG4( b ), for example, blocks 322-11 and 322-21 may be provided on the first limiting portion 322-1 and the second limiting portion 322-2, respectively. The blocks may limit the relative displacement between the follower 330 and the movable member 320 along the Y direction and / or the Z direction within a certain range, thereby improving the reliability of the technical solution of the embodiment of the present application. The blocking mechanism is not limited to blocks and may also be provided by, for example, a limiting pin, etc., which is not limited in the present application.

[0106] In the embodiment of the present application, the transfer structure 322 is not limited to the forms shown in Figures 3 and 4. Figure 5 shows a schematic structural diagram of another form of the transfer structure 322 provided in the embodiment of the present application. In the transfer structure shown in Figure 5, there may be no magnetic attraction between the limiting parts.

[0107] Specifically, as shown in (a) of Figure 5, a third limiting portion 322-3 and a fourth limiting portion 322-4 can be set on the movable part 320, and a fifth limiting portion 322-5 can be set on the follower 330. The fifth limiting portion 322-5 is located between the third limiting portion 322-3 and the fourth limiting portion 322-4 along the X-axis. The third limiting portion 322-3 and the fifth limiting portion 322-5 can include two corresponding surfaces (a third surface and a fourth surface). An elastic component 322-6 (a second elastic component) can be set between the fourth limiting portion 322-4 and the fifth limiting portion 322-5. The elastic component 322-6 can have a larger elastic coefficient along the X-axis.

[0108] When the follower 330 moves in the positive direction of the X-axis, the follower 330 can push the movable member 320 in the positive direction of the X-axis through the contact surface with the third limiter 322-3. When the follower 330 moves in the negative direction of the X-axis, the elastic force provided by the compression of the elastic component 322-6 can cause the movable member 320 to move in the negative direction of the X-axis. To reduce the degree of hysteresis in the movement of the movable member 320 in the negative direction of the X-axis, the elastic component 322-6 can be in a stored force state, for example, pre-compressed, so that it can push the movable member 320 to move when the follower 330 has a small displacement in the negative direction of the X-axis.

[0109] To reduce the impact of displacement of the follower 330 along the Y-axis or Z-axis on the stability of the movable member 320, the elastic member 322-6 can have a smaller elastic coefficient along the Y-axis or Z-axis. For example, the elastic coefficient along the Y-axis or Z-axis can be much smaller than the elastic coefficient along the X-axis. For example, the elastic coefficient along the X-axis of the elastic member 322-6 can be several hundred times greater than the elastic coefficient along the Y-axis or Z-axis.

[0110] The elastic component 322 - 6 may be an elastic spring, or may be rubber, a spring or other components, which is not limited in this application.

[0111] When the elastic component 322-6 is a spring, the fourth limiting portion 322-4 or the fifth limiting portion 322-5 can have opposite surfaces that can protrude to form a guide axis set at the axis center of the spring, so that the spring can always follow the guide axis when it is stretched and contracted to minimize the degree of inclination, which is also convenient for positioning and pre-stressing the spring.

[0112] Compared with FIG5(a), the transmission structure 322 shown in FIG5(b) does not require an elastic component. Instead, the fifth limiting portion 322-5 is directly set between the third limiting portion 322-3 and the fourth limiting portion 322-4. Along the X-axis direction, the fifth limiting portion 322-5 can be in an interference fit state with the gap between the third limiting portion 322-3 and the fourth limiting portion 322-4, thereby reducing the friction between the fifth limiting portion 322-5 and the third limiting portion 322-3 or the fourth limiting portion 322-4, and further reducing the influence of the disturbance of the follower 330 along the non-active direction (non-X-axis direction) on the movement of the movable portion 320.

[0113] In this embodiment, when the follower 330 moves along the negative direction or the positive direction of the X-axis, the movable member 320 is pushed to move in the corresponding direction through the surfaces in contact with the third limiting portion 322-3 and the surfaces in contact with the fourth limiting portion 322-4.

[0114] In the transmission structure 322 shown in FIG5(c), a ball bearing 322-7 can be disposed between the fourth limiting portion 322-4 and the fifth limiting portion 322-5. When the follower 330 moves in the positive direction of the X-axis, the contact surface with the third limiting portion 322-3 can push the movable member 320 in the positive direction of the X-axis. When the follower 330 moves in the negative direction of the X-axis, the ball bearing 322-7 can push the movable member 320 in the negative direction of the X-axis. The ball bearing 322-7 can reduce the friction between the follower 330 and the movable member 320, thereby stabilizing the movement of the movable member 320 in the first direction.

[0115] The number of the balls 322 - 7 can be set arbitrarily, and the balls 322 - 7 can also be replaced by components such as sliders.

[0116] It should be understood that the form of the above-mentioned transmission structure 322 can be transformed to a certain extent. For example, for the transmission structure 322 of Figures 3 and 4, the relative positions of the first limit member 322-1 and the second limit member 322-2 on the X-axis can be interchanged. In this way, when the follower 330 moves along the positive direction of the X-axis, the movable member 320 can be attracted to move along the positive direction of the X-axis by the magnetic force; when the follower 330 moves along the negative direction of the X-axis, the movable member 320 can be pushed to move in the negative direction of the X-axis through the abutment surface.

[0117] As for the transmission structure shown in (a) or (c) of Figure 5, the elastic component 322-6 or the ball 322-7 can be set between the third limiting portion 322-3 and the fifth limiting portion 322-5, so that when the follower 330 moves along the positive direction of the X-axis, the elastic component 322-6 or the ball 322-7 pushes the movable part 320 to move, and when it moves in the negative direction, the movable part 320 is pushed to move through the contacting surfaces.

[0118] Alternatively, two limiting portions may be provided on the follower 330 and one limiting portion sandwiched between the two limiting portions may be provided on the movable member 320 , and the position of the elastic component 322 - 6 may be arbitrarily set.

[0119] Alternatively, an elastic component or any number of balls can be set between the third limiting portion 322-3 and the fifth limiting portion 322-4, and any number of balls can also be set between the fourth limiting portion 322-4 and the fifth limiting portion 322-5. This application does not impose any restrictions on this.

[0120] For the transmission structure shown in FIG. 5( b ), two limiting portions may be provided on the driven member 330 and one limiting portion sandwiched between the two limiting portions may be provided on the movable member 320 .

[0121] In addition, for the transmission structure 322 shown in Figures 4 and 5, a lubricating liquid or the like can be provided between the surfaces of the mutually contacting limiting parts to reduce the friction between the limiting parts, so that the movement of the movable part 320 along the first direction is smoother.

[0122] It should also be understood that in addition to the forms shown in Figures 4 and 5, the transmission structure can also be in other forms. For example, matching protrusions and recesses can be provided on the follower 330 and the movable part 320. The size of the recess along the Y axis and the Z axis can be larger than the size of the protrusion along the Y axis or the Z axis, so that the disturbance of the follower 330 along the Y axis or the Z axis can be absorbed by the transmission structure, thereby improving the stability of the movement of the movable part 320. This application does not limit the form of the transmission structure 322. In addition, a stopper similar to that shown in Figure 4 (b) can also be provided on the transmission structure shown in Figure 5, so as to limit the relative displacement between the follower 330 and the movable part 320 along the Y axis or the Z axis to a certain range.

[0123] The resonator 340 works based on the inverse piezoelectric effect of the piezoelectric material. The inverse piezoelectric effect means that when an electric field is applied in the polarization direction of the dielectric, these dielectrics can produce mechanical deformation or mechanical stress in a certain direction. When the external electric field is removed, the deformation or mechanical stress disappears. In some embodiments, when the piezoelectric material is not energized or the current is very small, the piezoelectric material is in an initial state; when a positive current is passed through the piezoelectric material, the piezoelectric material extends and is in an elongated state; when a negative current is passed through the piezoelectric material, the piezoelectric material contracts and is in a shortened state. In other words, the piezoelectric material will deform according to the applied electrical signal, and when the electrical signal is an alternating signal, the piezoelectric material can undergo a cyclic expansion and contraction motion.

[0124] By applying a control signal to the piezoelectric material, the piezoelectric material undergoes mechanical deformation. When a periodic electrical signal is applied, the piezoelectric material can undergo periodic deformation in response to the periodic electrical signal, thereby performing periodic motion or vibration. The piezoelectric material can be an inorganic piezoelectric material, such as a piezoelectric crystal or piezoelectric ceramic, or an organic piezoelectric material, such as polyvinylidene fluoride. This application does not limit the type of piezoelectric material used in resonator 340.

[0125] The resonator 340 may include a contact portion 341 and a support portion 342 . The contact portion 341 is configured to contact other components and provide friction as a driving force.

[0126] The contact portion 341 can perform arc or elliptical motion following the periodic deformation of the piezoelectric material. By controlling the current characteristics of the piezoelectric material and the number of the contact portions 341 , the contact portion 341 can be made to move in a corresponding direction.

[0127] FIG6 is a schematic structural diagram (exploded view) of the resonator provided in an embodiment of the present application. The resonator 340 can be composed of a piezoelectric material plate (first piezoelectric plate 343) and a vibration plate 344, and the vibration plate 344 and the first piezoelectric plate 343 can be combined by gluing, threading, etc. A surface of the vibration plate 344 protrudes outward to form a contact portion 341. The other parts of the vibration plate 344 except the contact portion 341 and the first piezoelectric plate 343 together constitute the support portion 342. When the resonator 340 is working, the preload of the preload 350 can have a component force along the Y-axis direction (the thickness direction of each plate of the resonator 340), so that the contact portion 341 is pressed against the end face 333 of the follower 330, and the follower 330 is driven to move along the X-axis direction by friction.

[0128] It should be understood that FIG6 shows only one contact portion 341. In practice, the number of contact portions 341 can be set as needed. For example, multiple contact portions can be provided, and the movements of different contact portions 341 can be combined to cause the follower 330 to move in the first direction.

[0129] 6 , the driving force is provided by the surface of the resonator 340 and the contact portion 341 provided on the surface. In some embodiments, the resonator 340 may still be a plate-shaped structure as a whole, but the driving force is provided by the side surface of the resonator 340.

[0130] As shown in Figure 7, resonator 340 can be composed of two piezoelectric plates (a second piezoelectric plate 345 and a third piezoelectric plate 347) and a vibration plate 346 sandwiched between the two piezoelectric plates. The piezoelectric plates and vibration plate 346 can be joined together by gluing, threading, or other methods. The vibration plate 346 can have a side edge that protrudes outward to form a contact portion 341. The second piezoelectric plate 345, the vibration plate 346 excluding the contact portion 341, and the third piezoelectric plate 347 form a support portion 342. When the resonator shown in FIG7 is applied to the driving module shown in FIG3 , when the resonator 340 is working, the pre-compression member 330 can apply a pre-compression force including a component force along the Y-axis direction to the resonator 340 through the side surface 3451 of the resonator 340, so that the contact portion 341 of the resonator 340 presses against the end surface 333 of the follower 330. When the contact portion 341 moves along the X-axis direction, the follower 330 can be driven to move along the X-axis direction by friction.

[0131] In the embodiment of Figure 3, the resonator 340 can vibrate according to the applied electrical signal, so that the friction between the follower 330 and the follower 330 can drive the movable part 320 to move, and the disturbance of the follower 330 along the Y direction and the Z direction can be absorbed by the transmission structure 322 between the follower 330 and the movable part 320.

[0132] It should be understood that the resonator 340 shown in FIG6 and FIG7 is provided with a vibration plate. In some embodiments, the resonator 340 may not include a vibration plate, and the contact portion may be directly provided on the piezoelectric plate, which can improve driving efficiency.

[0133] Pre-compression member 350 can be a rigid component or an elastic component. In the drive module shown in FIG3 , pre-compression member 350 can be mounted on fixing member 310, for example, by means of a threaded connection, adhesive connection, snap-fit ​​connection, or other connection method. Pre-compression member 350 can provide pre-compression force to resonator 340, thereby enabling resonator 340 to abut against follower 330. By varying the pressure provided by pre-compression member 350, the friction between resonator 340 and follower 330 can be varied, thereby providing varying amounts of driving force for the movement of follower 330.

[0134] A friction portion with a large friction coefficient may be provided on the driven member 330 at a position in contact with the resonator 340 , and the resonator 340 may provide a driving force to the driven member 330 through the friction portion when the resonator 340 vibrates.

[0135] In the drive module shown in FIG3 , the resonator 340 can be fixedly mounted on the preload 350 and drive the follower 330 to move along the X-axis. Specifically, among the preload 350, the resonator 340, and the follower 330, only the follower 330 is the moving element, while the other two elements are fixed elements. In some embodiments, in addition to the follower 330, the resonator 340 and / or the preload 350 can also be the moving element. In this case, the follower 330, the resonator 340, and the preload 350 can have positions or connections different from those shown in FIG3 .

[0136] Figure 8 shows a schematic diagram of the connection relationship between different pre-compression members, driven members, and resonators provided in an embodiment of the present application. In Figure 8 , the x-direction is the movement direction of the movable member 320 , and the y-direction is the direction of the pre-compression force of the resonator 340 .

[0137] In one embodiment, referring to Figures 8(a) and 8(b), Figure 8(a) is a schematic diagram on the xy plane, and Figure 8(b) is a schematic diagram on the zy plane corresponding to Figure 8(a). The resonator 340 can be fixedly connected to the follower 330, and the contact portion 341 of the resonator 340 can be disposed toward the pre-pressing member 350. A friction member 360 can be disposed between the pre-pressing member 350 and the resonator 340. The friction member 360 can be disposed separately from the pre-pressing member 350, or the friction member 360 can be an area with a large friction coefficient disposed on the pre-pressing member 350. The pre-pressing member 350 can be fixedly disposed on the fixing member 310 similar to Figure 3, and can be pressed against the resonator 340 along the Y-axis direction. When the resonator 340 vibrates, the contact portion 341 of the resonator 340 can cause the resonator 340 and the follower 330 to reciprocate along the X-axis through friction between the contact portion 341 and the friction member 360. This allows the follower 330 to drive the movable member 320 to move via the transmission structure 322. In this embodiment, the resonator 340 and the follower 330 are the movable members, while the preload member 350 is the fixed member.

[0138] In another embodiment, in FIG8(c), the resonator 340 can be fixedly connected to the pre-press 350, but the pre-press 350 can move relative to the fixed member 310 along the X-axis (perpendicular to the paper plane) via a guide structure. A friction portion 360 can be provided on the portion of the fixed member 310 located between the resonator 340 and the follower. The contact portion 341 of the resonator 340 can contact and rub against the friction portion 360 due to the pressure of the pre-press 350. The pre-press 350 can be connected to the follower 330 via a spring 370 or other connecting member (e.g., a connecting shaft). The spring 370 can pass through the through hole 313 in the fixed member 310 to connect the pre-press 350 and the follower 330. A guide structure can be provided between the follower 330 and the fixed member 310. To reduce the friction between the follower 330 and the fixed member 310, the guide structure can use a rolling member 380. When resonator 340 receives an electrical signal and vibrates, the friction between resonator 340 and friction portion 360 drives preload 350 to move, which in turn drives follower 330 to move. Follower 330 drives the movable member to move along the X-axis (the X-axis is perpendicular to the paper) via transmission structure 322. In this embodiment, resonator 340, preload 350, and follower 330 are all movable members.

[0139] In another embodiment, in FIG8(d), a resonator 340 is fixedly connected to a fixed member 310, and a preload 350 and a friction member 360 are fixedly connected, and can move as a whole along the X-axis. The preload 350 and the follower 330 can be connected by a connecting structure 370, thereby driving the follower 330 to move via a guide structure 380. When the resonator 340 is in operation, the friction force of the friction member 360 and the preload 350 is driven along the X-axis. The preload 350 drives the follower 330 through the connecting structure 370, thereby enabling the movable member 320 to move along the X-axis. In this embodiment, the preload 350 and the follower 330 are the moving members, while the resonator 340 is the fixed member.

[0140] It should be understood that regardless of the connection relationship between the preload, the oscillator, and the driven member, one of the oscillator 340 and the component in frictional contact with it is the moving member, and the other is the fixed member. For example, in Figure 3, the oscillator 340 is the fixed member, while the component in frictional contact with it (the driven member 330) is the moving member; in Figures 8(a) and (b), the oscillator 340 is the moving member, while the friction member 360 in frictional contact with it is the moving member; in Figure 8(c), the oscillator 340 is the moving member, while the friction portion in frictional contact with it is located on the fixed member 310 and is the fixed member; in Figure 8(d), the oscillator 340 is the fixed member, while the friction member 360 in frictional contact with it is the moving member. The moving member can directly or indirectly drive the driven member 330 to move. For example, the moving member itself can be the driven member 330, or the moving member can be the preload or a separately provided friction member. Different connection relationships can be set to ultimately drive the driven member 330 to move. The friction member can be provided independently of the pre-compression member 350, the fixed member 310, and the driven member 330, or it can be part of the aforementioned three components. Furthermore, in some embodiments, the pre-compression member 350 and the driven member 330 can be a single component, or the pre-compression member 350, the driven member 330, and the friction member can be combined into a single component, which is not limited in this application. The structures shown in Figures 3 and 8 are merely schematic illustrations, and other connection relationships can be provided between the driven member 330, the pre-compression member 350, and the resonator 340. For example, more components can be added or different motion transmission methods can be provided based on the schematic diagrams of Figures 3 or 6, which is not limited in this application.

[0141] When the resonator 340 provides driving force from the side, the follower 330 and the pre-loaded member 350 can be combined into a single component, and the structure between this component and the resonator 340 can be as shown in Figure 9. In Figure 9, the resonator 340 can provide driving force from both sides, which can improve the driving effect. The side of the resonator 340 protrudes to form two symmetrical contact portions 341, which contact the pre-loaded member 350. In Figure 9 (a), the resonator 340 is a fixed member, for example, it can be fixedly connected to the fixed member 310. The pre-loaded member 350 is driven by friction, which drives the follower 330 to move, thereby driving the movable member. In Figure 9 (b), the resonator 340 is the movable member, and the pre-loaded member 350 is a fixed member, for example, it can be fixedly mounted on the fixed member 310. The resonator 340 can drive the resonator 340 and the follower 330 fixedly connected to the resonator 340 to move through friction, thereby driving the movable member.

[0142] It should be understood that when the resonator 340 provides driving force through two sides, the connection relationship between the resonator 340, the pre-loaded part 350 and the driven part 330 can also have other forms. For example, the pre-loaded part 350 can be the same component as the fixing part 310. This application does not limit the relationship between the three.

[0143] It should also be understood that the above embodiments only use one resonator and one pre-compression member in the driving module as an example to introduce the technical solution of the embodiments of the present application. In fact, the driving module may include multiple resonators or multiple pre-compression members, and the present application does not limit this.

[0144] When the driving module is applied to a camera module, the camera module may also include a position sensor and a control unit. The position sensor may be a Hall position sensor or a TMR sensor. The position sensor and the control unit may be an integrated control IC (integrated circuit). The control unit determines the current position and target position of the movable part 320. When the current position does not reach the target position, it may further trigger a control instruction and input a corresponding electrical signal to the resonator 340, so that the movable part 320 can eventually move to the target position, realizing position closed-loop control.

[0145] In some embodiments, when the transmission structure between the follower 330 and the movable member 320 adopts the structure shown in Figure 4, the movement process of the movable member 320 can be divided into two sections. The first section may not require precise closed-loop control, while the second section requires precise closed-loop control. In the initial state, the movable member 320 may not be in contact with the follower 330, but is maintained in the initial state by a pop-up press-back mechanism. When the position of the movable member 320 needs to be precisely controlled, the external force provided by the pop-up press-back mechanism can be used to make the movable member 320 shake hands with the follower 330. When precise control is not required, the movable member 320 can be separated from the follower 330 by this mechanism.

[0146] As shown in (a) and (b) of Figure 10 , the pop-up pressing mechanism may include a first magnetic attraction component and a locking member 3153. The locking member 3153 may be, for example, a block or a lever, and may be movable in a first direction relative to the fixed member 310 via a guide structure. The locking member 3153 may limit the position of the movable member 310 between a first position and a second position, and the locking member 3153 may remain relatively stationary with respect to the movable member 310.

[0147] The locking member 3153 can move from the third position (the position in FIG. 10 (a)) to the fourth position (the position in FIG. 10 (b)). The first magnetic assembly can be used to provide power to move the movable member 320 along the first direction (from the first position in FIG. 10 (a) to the second position in FIG. 10 (b)), so that the surfaces opposite to the first limiting portion 322-1 and the second limiting portion 322-1 change from a separated state to a contact state. In one embodiment, the first magnetic assembly may include at least one pair of magnetic members (3151 and 3152) provided on the movable member 320 and the fixed member 310. In the initial state, the locking member 3153 is in the third position and the movable member 310 is in the first position. The locking member 3153 can press the movable member 320. As shown in FIG. 10 (a), the limiting portion 322-1 of the movable member 320 and the limiting portion 322-2 of the follower 330 are in a separated state. When it is necessary to precisely control the movement of the movable part 320, the locking part 3153 can be controlled so that the locking part 3153 moves upward to the fourth position, so that the movable part 320 can be pushed upward by the repulsive force between the magnetic parts until the limiting part 322-1 of the movable part 320 and the limiting part 322-1 of the follower 330 are in contact (the movable part is in the second position at this time), as shown in (b) of Figure 10. When the follower 330 subsequently drives the movable part 320 to move, the locking part 3153 can be controlled to be retracted to a position that does not block the continued movement of the movable part 310, for example, to the inside of the fixed part 310, or it can be moved upward to the limit of the movement of the movable part 320. When the drive module is no longer used, the locking part 3153 can move downward so that the limiting parts of the movable part 320 and the follower 330 are separated, and the locking part 3153 and the movable part 320 return to their initial positions.

[0148] In another embodiment, the pop-up pressing mechanism may also include only a first magnetic attraction component, which may be an electromagnet. By controlling the direction of the current in the magnet, the polarity of the magnet can be controlled, so that there is a repulsive force between the movable part 320 and the fixed part 310, thereby pushing the movable part 320 along the direction of movement to shake hands with the follower 330. As shown in (b) of Figure 10, when shaking hands, the limiting parts between the follower 330 and the movable part 320 can contact each other. If the movable part 320 needs to be separated from the follower 330, an additional mechanism can be set to perform the corresponding operation, or the magnets can be made to have an attractive force, and the attractive force is large, so that the movable part 320 contacts the fixed part 310.

[0149] As shown in (c) and (d) of Figure 10, the pop-up pressing mechanism may further include a first elastic component 315 and a locking component 3153. The first elastic component 315 may be, for example, a pop-up reed, a spring, or the like. In the initial state, the first elastic component 315 may be pre-compressed, for example, by the locking component 3153 so that the first elastic component 315 remains in a compressed state. When precise control of the movement of the movable member 320 is required, the locking component 3153 may be controlled to move upward, causing the first elastic component 315 to pop out, thereby pushing the movable member 320 toward the follower 330 to shake hands. When the movement of the movable member 320 does not need to be precisely controlled, the locking component may be moved downward again, for example, to press the movable member 320 back to its initial position. In this way, when the movable member 320 is no longer needed, the movable member 320 may be separated from the follower 330, thereby reducing the impact on the movement of other components.

[0150] The first elastic member 315 can be fixed at only one end, for example, only fixed to the movable member 320 in FIG10(c). The end of the first elastic member 315 closest to the fixed member 315 can be free, but in a compressed state, it abuts against the end surface of the fixed member 310. When the first elastic member 315 is released, allowing the surfaces of the movable member and the driven member to contact, the first elastic member 315 can return to its free length, thereby not affecting the movement of the movable member 320 driven by the driven member 330.

[0151] Figure 10(e) shows the initial state without the pop-up / press-return mechanism. In this initial state, the follower 330 also needs to contact the movable member via the transmission structure. Due to the limitations of the guide structure of the follower 330, the height of the follower makes the height H1 of the drive module in the initial state greater than the height H shown in Figure 10(a).

[0152] The embodiment shown in FIG10 can reduce the size of the entire module when the drive module is not in use, making the device incorporating the drive module more portable. For example, when the drive module is applied to a camera module of an electronic device, only when the user opens a camera application will the pop-up and retract mechanism release the movable member 320, causing the movable member to shake hands with the driven member through the stopper. When the user is not in use, the two stoppers are separated, thereby reducing the size of the entire electronic device and making the electronic device more portable.

[0153] The technical solutions of the embodiments of this application have been described above using the example of an embodiment in which both the X-axis and the first direction are along the optical axis. In some embodiments, the first direction may also be perpendicular to the optical axis to achieve optical image stabilization. The structures of the preload element, follower, resonator, movable element, and fixed element, as well as the connections between the various components, can be referenced from the embodiment in which the first direction is along the optical axis and will not be further described here.

[0154] An embodiment of the present application also provides a camera assembly, including the driving module, lens assembly and image sensor introduced above.

[0155] An embodiment of the present application also provides an electronic device, including the driving module introduced above or including the above-mentioned camera assembly.

[0156] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A driving module, characterized in that: include: A fixed part (310), a movable part (320), a resonator (340) and a driven part (330); wherein, The fixing member (310) comprises a first mounting hole (311); The movable part (320) is used to carry the optical element and is arranged in the first mounting hole (311); The resonator (340) is used to drive the driven member (330) to reciprocate along a first direction relative to the fixed member (310); When the follower (330) reciprocates along the first direction relative to the fixed member (310), the follower (330) transmits the movement of the follower (330) along the first direction to the movable member (320) via the transmission structure (322), thereby driving the movable member (320) to reciprocate along the first direction.

2. The driving module according to claim 1, characterized in that: The transmission structure (322) comprises a first limiting portion (322-1) and a second limiting portion (322-2) which are sequentially arranged along the first direction, wherein the first limiting portion (322-1) is arranged on the movable part (320), and the second limiting portion (322-2) is arranged on the driven part (330), and the first limiting portion (322-1) and the second limiting portion (322-2) respectively comprise a first surface and a second surface which are opposite to each other, and there is a magnetic attraction force between the first limiting portion (322-1) and the second limiting portion (322-2), and when the driven part (330) drives the movable part (320) to reciprocate along the first direction, the first surface and the second surface are in contact with each other.

3. The driving module according to claim 2, characterized in that: The movable member (320) is used to move from the first position to the second position along the first direction under the action of the pop-up pressing mechanism, so that the first surface of the first limiting portion (322-1) and the second surface of the second limiting portion (322-2) change from a separated state to a contact state, so that the transmission structure (322) can transmit the movement of the follower along the first direction to the movable member (320); or, The movable member (320) is used to move from the second position to the first position along the first direction under the action of the pop-up pressing mechanism, so that the first surface of the first limiting portion (322-1) and the second surface of the second limiting portion (322-2) change from a contact state to a separation state, so that the transmission structure (322) cannot transmit the movement of the follower (330) along the first direction to the movable member.

4. The driving module according to claim 3, characterized in that: The pop-up pressing mechanism comprises a locking component (3153) and a pop-up component (315), the locking component (3153) is in contact with the movable part (320), and the pop-up component (315) comprises a first magnetic attraction component (3151, 3152) or a first elastic component; The locking component (3153) is used to move from the third position to the fourth position along the first direction, so that the movable part (320) can move from the first position to the second position under the action of the pop-up component (315); or, the locking component (3153) is used to move from the fourth position to the third position along the first direction, so that the movable part (320) can move from the second position to the first position along the first direction under the action of the pop-up component (315).

5. The driving module according to any one of claims 1 to 4, characterized in that: The driving module further comprises a pre-pressing member (350), wherein the pre-pressing member (350) is used to provide a pre-pressure to the resonator (340), and the resonator (340) is used to drive the driven member (330) to reciprocate along the first direction under the action of the pre-pressure.

6. The driving module according to any one of claims 1 to 5, characterized in that: The movable part (320) reciprocates along the first direction through a first guide structure; the first guide structure comprises a first guide shaft (3211-1) and a first groove (3211-2) matched with the first guide shaft (3211-1), and the first guide shaft (3211-1) and the first groove (3211-2) are respectively arranged on the fixed part (310) and the movable part (320) and extend along the first direction.

7. The driving module according to claim 6, characterized in that: The first guide structure comprises a second guide shaft (3212-1) and a guide portion (3212-2); the second guide shaft (3212-1) and the guide portion (3212-2) are respectively arranged on the fixed member (310) and the movable member (320) and extend along the first direction.

8. The driving module according to claim 6 or 7, characterized in that: The driving module includes a second magnetic attraction component, and the second magnetic attraction component is used to make the first guide shaft (3211-1) and the first groove (3211-2) abut against each other.

9. The driving module according to any one of claims 1 to 8, characterized in that: The follower (330) reciprocates along the first direction through a second guide structure, the second guide structure includes a first groove body (3311-1) arranged on the follower (330), a second groove body (3311-2) arranged on the fixed member (310) and a sliding connection member, the first groove body (3311-1) and the second groove body (3311-2) are arranged relative to each other and constitute a receiving groove for receiving the sliding connection member, and the receiving groove extends along the first direction.

10. The driving module according to claim 9, characterized in that: The sliding connection member is a ball.

11. The driving module according to any one of claims 1 to 10, characterized in that: The driving module also includes a friction member, the resonator (340) is a fixed member, and the friction member is a moving member. When the resonator (340) vibrates, the friction force between the resonator (340) and the friction member drives the driven member (330) to reciprocate along the first direction.

12. The driving module according to claim 5, characterized in that: The resonator (340) is a fixed part. The resonator (340) is fixedly arranged on the fixed part (310) via the pre-pressing part (350). The resonator (340) is used to drive the driven part (330) to reciprocate along the first direction through the friction force between the resonator (340) and the driven part (330).

13. The driving module according to any one of claims 1 to 10, characterized in that: The driving module also includes a friction member, the resonator (340) being a moving member, the friction member being fixed to the fixing member (310), and the friction force between the resonator (340) and the friction member when the resonator (340) vibrates drives the resonator (340) and the driven member (330) to reciprocate along the first direction.

14. The driving module according to claim 13, characterized in that: The friction member is fixed to the fixing member (310), and the resonator (340) and the driven member (330) are fixedly connected.

15. The driving module according to claim 1, characterized in that: The transmission structure (322) comprises a third limiting portion (322-3), a fourth limiting portion (322-4), a fifth limiting portion (322-5) and a second elastic component (322-6); the third limiting portion (322-3) and the fourth limiting portion (322-4) are arranged on the movable member (320); the fifth limiting portion (322-5) is arranged on the driven member (330); the fifth limiting portion (322-5) is located between the third limiting portion (322-3) and the fourth limiting portion (322-4) along the first direction; the third limiting portion (322-3) and the fifth limiting portion (322-5) respectively comprise a third surface and a fourth surface which are arranged opposite to each other; the second elastic component (322-6) is included between the fifth limiting portion (322-5) and the fourth limiting portion (322-4).

16. The driving module according to claim 1, characterized in that: The transmission structure (322) comprises a third limiting portion (322-3), a fourth limiting portion (322-4) and a fifth limiting portion (322-5); the third limiting portion (322-3) and the fourth limiting portion (322-4) are arranged on the movable member (320); the fifth limiting portion (322-5) is arranged on the driven member (330); the fifth limiting portion (322-5) is located between the third limiting portion (322-3) and the fourth limiting portion (322-4) along the first direction; the fifth limiting portion (322-5) abuts against the third limiting portion (322-3) and the fourth limiting portion (322-4), respectively.

17. The driving module according to claim 1, characterized in that: The transmission structure (322) comprises a third limiting portion (322-3), a fourth limiting portion (322-4), a fifth limiting portion (322-5) and a ball (322-7); the third limiting portion (322-3) and the fourth limiting portion (322-4) are arranged on the movable member (320); the fifth limiting portion (322-5) is arranged on the driven member (330); the fifth limiting portion (322-5) is located between the third limiting portion (322-3) and the fourth limiting portion (322-4) along the first direction; the third limiting portion (322-3) and the fifth limiting portion (322-5) respectively comprise a third surface and a fourth surface which are arranged opposite to each other; the ball (322-7) is included between the fifth limiting portion (322-5) and the fourth limiting portion (322-4).

18. The driving module according to any one of claims 1 to 17, characterized in that: The optical element includes a lens, or the optical element includes a lens and an aperture.

19. The driving module according to any one of claims 1 to 18, characterized in that: The first direction is the axial direction of the first mounting hole (311).

20. A camera module, characterized in that: It comprises an optical element and a driving module as claimed in any one of claims 1 to 19, wherein the movable part (320) is used for carrying the optical element.

21. An electronic device, characterized in that: It comprises the driving module as described in any one of claims 1 to 19 or the camera module as described in claim 20.

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