Driving module, camera module and electronic equipment

Abstract

The invention provides a driving module, a camera module and electronic equipment. The driving module comprises a fixed part, a movable part, a harmonic oscillator and a driven part, wherein the fixing piece comprises a first mounting hole; the movable part is used for bearing the optical element and is arranged in the first mounting hole; the harmonic oscillator is used for driving the driven piece to reciprocate along a first direction relative to the fixed piece; when the driven part reciprocates in the first direction relative to the fixed part, the driven part transmits the movement of the driven part in the first direction to the movable part through the transmission structure, so that the movable part is driven to reciprocate in the first direction. Through the technical scheme provided by the embodiment of the invention, the movement stability of the movable part can be improved.

Description

Technical Field

[0001] This application relates to the field of electronic technologies, and more particularly, to a driving module, a camera module, and an electronic device. Background Art

[0002] With the continuous development of electronic device technologies, the shooting function has become an essential function of electronic devices (such as mobile phones, tablet computers, etc.).

[0003] To meet the long-stroke driving requirements, piezoelectric-driven camera module motors are applied. Piezoelectric driving realizes energy transfer through the high-frequency vibration of a vibrating body and the pre-pressure friction between the vibrating body and a contact object (such as a moving part in a camera module), so that the contact object realizes linear or rotational motion.

[0004] However, the pre-pressure participates in the force system of the moving parts in the camera module. The asymmetric and unstable pre-pressure throughout the entire stroke may cause the moving parts to get stuck or tilted when moving. Summary of the Invention

[0005] This application provides a driving module, a camera module, and an electronic device, which can improve the motion stability of the moving parts in the camera module.

[0006] In a first aspect, a driving module is provided, including: a fixed part, a moving part, a resonator, and a follower; wherein, the fixed part includes a first mounting hole; the moving part is used to carry an optical element and is arranged in the first mounting hole; the pre-pressure part is used to cooperate with the resonator to drive the follower to reciprocate relative to the fixed part along a first direction; when the follower reciprocates relative to the fixed part along the first direction, the follower transfers the motion of the follower along the first direction to the moving part through a transfer structure, so as to drive the moving part to reciprocate along the first direction.

[0007] In this embodiment, since the pre-pressure of the resonator is applied to the follower and does not directly act on the moving part, the moving part is driven by the follower to move along the first direction, and the follower only transfers the motion of the follower along the first direction through the transfer structure. Therefore, when the follower has a certain disturbance in other directions due to uneven pre-pressure or environmental vibration, etc., the motion of the moving part is difficult to be affected, and it can always move along the first direction, and the motion of the moving part is more stable. Since the optical element carried by the moving part has high requirements for fine control of motion, the technical solution provided by the embodiment of this application can make the motion of the moving part carrying the optical element smoother and meet the requirements for fine control of the position or distance of the optical element.

[0008] In combination with the first aspect, in some implementation manners 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 member, and the second limiting portion is arranged on the driven member. The first limiting portion and the second limiting portion respectively include opposite first surfaces and second surfaces. There is a magnetic attraction force between the first limiting portion and the second limiting portion. When the driven member drives the movable member to reciprocate along the first direction, the first surface and the second surface come into contact with each other.

[0009] The first surface and the second surface can be planes perpendicular to the first direction. The two opposite first surfaces and second surfaces of the first limiting portion and the second limiting portion can be attracted by the magnetic attraction force and come into contact with each other. When the direction of movement of the driven member causes the first surface and the second surface to separate from each other, due to the magnetic attraction effect, the two surfaces can still come into contact with each other, thereby driving the movable member to move correspondingly through the magnetic attraction force. When the direction of movement of the driven member causes the first surface and the second surface to approach each other, the driven member can push the movable member to move along the first direction through the pressure on the contacting surfaces of the two limiting portions.

[0010] In combination with the first aspect, in some implementation manners of the first aspect, the movable member is configured to move from a first position to a second position along the first direction under the action of the pop-up and press-back mechanism, so that the first surface of the first limiting portion and the second surface of the second limiting portion change from a separated state to a contact state, enabling the transmission structure to transmit the movement of the driven member along the first direction to the movable member; or, the movable member is configured to move from the second position to the first position along the first direction under the action of the pop-up and press-back mechanism, so that the first surface of the first limiting portion and the second surface of the second limiting portion change from a contact state to a separated state, such that the transmission structure cannot transmit the movement of the driven member along the first direction to the movable member.

[0011] In combination with the first aspect, in some implementation manners of the first aspect, the pop-up and press-back mechanism includes a locking member and a pop-up member. The locking member is in contact with the movable member, and the pop-up member includes a first magnetic attraction assembly or a first elastic member; the locking member is configured to move from a third position to a fourth position along the first direction, so that the movable member can move from the first position to the second position under the action of the pop-up member; or, the locking member is configured to move from the fourth position to the third position along the first direction, so that the movable member can move from the second position to the first position along the first direction under the action of the pop-up member

[0012] The first elastic member can be an elastic member such as a spring or a reed, and the first elastic member can be in a state of storing energy. In the initial state, the two limiting portions can be separated along the first direction. When fine control of the position of the movable member is required, the elastic member can be released through the locking device, so that the movable member moves along the first direction towards the driven member, and thus the first surface and the second surface of the two limiting portions change from the separated state to the contacting state. Subsequently, through the control of the resonator, the position of the movable member can be finely controlled.

[0013] In the embodiment of the present application, one end of the first elastic member can be fixed only, and the other end is a free end. And after being released to make the first surface and the second surface of the movable member and the driven member contact, the first elastic member is in a non-energized free state, so that the subsequent movement of the driven member driving the movable member will no longer be affected by the first elastic member.

[0014] The first magnetic attraction assembly can be at least a pair of magnetic attraction members arranged on the movable member and the fixed member. When the locking device moves, the movable member can move following the locking device under the action of the first magnetic attraction assembly, so that the movable member and the driven member are separated or contacted.

[0015] Or the pop-up and press-back mechanism can only include the first magnetic attraction assembly. The first magnetic attraction assembly can be, for example, an electromagnet, and one of the first magnetic attraction assemblies is correspondingly arranged on the fixed member and the movable member respectively. When fine control of the position of the movable member is required, the electromagnet can be energized, so that the movable member moves along the first direction, and the two limiting portions change from the separated state to the contacting state.

[0016] Combined with the first aspect, in some implementation manners of the first aspect, the driving module further includes a preloading member for providing a preloading force to the resonator, and the resonator is used for driving the driven member to reciprocate along the first direction under the action of the preloading force.

[0017] The preloading member can provide the preloading force required for the resonator to generate frictional force.

[0018] In some implementation manners, the preloading member can not be provided separately. For example, through the structural design of the fixed member or the driven member, the fixed member or the driven member can provide a preloading force to the resonator.

[0019] Combined with the first aspect, in some implementation manners of the first aspect, the movable member reciprocates along the first direction through a first guiding structure, and the first guiding 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 member and the movable member and extend along the first direction.

[0020] The first groove can 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.

[0021] The first guiding structure can also be a combination of a guide rail and a sliding connection member, a combination of a guide shaft and a bushing, or any other form of guiding structure. The sliding connection member can be a ball, a slider, etc., and the present application does not make any limitations thereto.

[0022] Combined with the first aspect, in some implementation manners of the first aspect, the first guiding structure includes a second guide shaft and a guiding portion, and the second guide shaft and the guiding portion are respectively disposed on the fixed part and the movable part and extend along the first direction.

[0023] The cooperation between the guiding portion and the second guide shaft can prevent the movable part from rotating around the first guide shaft when moving along the first direction, and can make the movement of the movable part smoother.

[0024] Combined with the first aspect, in some implementation manners of the first aspect, the driving module includes a second magnetic attraction assembly, and the second magnetic attraction assembly is used to make the first guide shaft and the first groove abut against each other.

[0025] Through the second magnetic attraction assembly, a clamping force between the movable part and the first guide shaft can be generated when the movable part moves, so that the abutting state between the first guide shaft and the first groove can be maintained all the time when the movable part reciprocates along the first direction, thereby realizing strict guiding in the first direction. When the driving module is subjected to an external force such as falling, although the movable part may temporarily deviate perpendicular to the first direction, it can quickly return to the initial position through the clamping force, making the reliability of the entire driving module higher.

[0026] Combined with the first aspect, in some implementation manners of the first aspect, the driven part reciprocates along the first direction relative to the fixed part through a second guiding structure. The second guiding structure includes a first groove body disposed on the driven part, a second groove body disposed on the fixed part, and a sliding connection member. The first groove body and the second groove body are oppositely disposed and form a receiving groove for receiving the sliding connection member, and the receiving groove extends along the first direction.

[0027] The sliding connection member can be a ball or a slider. When the second guiding structure is a ball, the resistance of the movement of the driven part can be reduced, making the movement of the driven part smoother.

[0028] Combined with the first aspect, in some implementation manners of the first aspect, the sliding connection member is a ball.

[0029] 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 stationary member, the friction member is a moving member, and when the resonator vibrates, it drives the driven member to reciprocate along the first direction through the frictional force between the resonator and the friction member.

[0030] The resonator being a stationary member means that the resonator does not move relative to the fixed member. The resonator can be directly connected to the fixed member, or when a preloading member is additionally provided in the driving module and the preloading member is also a stationary member, the resonator can be fixed on the preloading member, and the preloading member is fixed on the fixed member.

[0031] When a preloading member is additionally provided in the driving module, the friction member can be provided on the preloading member or the driven member.

[0032] The friction member can be a separate component, fixedly connected to the preloading member or the driven member, or the friction member can be a part of the preloading member or the driven member.

[0033] 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 to drive the driven member to move; in another embodiment, the friction member can be connected to the preloading member, and the preloading member can be connected to the driven member, so that the friction member can drive the driven member to move through the preloading member. In this case, the preloading member and the driven member can be integrated into one component. For example, the preloading member can directly drive the moving member to move along the first direction as the driven member.

[0034] When the friction member is a part of the preloading 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 preloading member to move through the friction member, and the preloading member is connected to the driven member, so that the driven member also moves accordingly.

[0035] In combination with the first aspect, in some implementations of the first aspect, the resonator is a stationary member, the resonator is fixedly arranged on the fixed member through the preloading member, and the resonator is used to drive the driven member to reciprocate along the first direction through the frictional force between the resonator and the driven member.

[0036] 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, it drives the resonator and the driven member to reciprocate along the first direction through the frictional force between the resonator and the friction member.

[0037] The harmonic oscillator driving the follower to move in the first direction may mean that the harmonic oscillator is directly connected to the follower and drives the follower to move; or when the driving module includes a preloading member, the harmonic oscillator is directly connected to the preloading member, and the preloading member is connected to the follower, so that the harmonic oscillator can indirectly drive the follower to move.

[0038] The friction member and the fixing member being fixed may mean that the friction member is directly fixed on the fixing member. When the driving module is provided with a preloading member and the preloading member is also a fixing member, the friction member can also be directly fixed on the preloading member, and the preloading member is fixed to the fixing member.

[0039] Combined with the first aspect, in some implementation manners of the first aspect, the friction member is fixed to the fixing member, and the harmonic oscillator is fixedly connected to the follower.

[0040] Combined with the first aspect, in some implementation manners of the first aspect, the transmission structure includes a third limiting portion, a fourth limiting portion, a fifth limiting portion and a second elastic member. The third limiting portion and the fourth limiting portion are disposed on the movable member, the fifth limiting portion is disposed on the follower, the fifth limiting portion is located between the third limiting portion and the fourth limiting portion along the first direction, the third limiting portion and the fifth limiting portion respectively include a third surface and a fourth surface disposed opposite to each other, and a second elastic member is included between the fifth limiting portion and the fourth limiting portion.

[0041] 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 can push the movable member to perform corresponding movement through the third surface and the fourth surface.

[0042] When the movement of the follower tends to make the fifth limiting portion approach the fourth limiting portion, the follower can push the movable member to perform corresponding movement through the second elastic member. The second elastic member can be an elastic member such as a spring or a metal reed piece. The second elastic member can be in a state of storing energy, so that even if the follower has only a small displacement, the movable member can perform corresponding displacement without hysteresis.

[0043] In some embodiments, a limiting portion may also be provided on the movable member and two limiting portions may be provided on the follower. The specific details may refer to the case where two limiting portions are provided on the movable member and one limiting portion is provided on the follower.

[0044] In combination with the first aspect, in some implementation manners of the first aspect, the transmission structure includes a third limiting portion, a fourth limiting portion, and a fifth limiting portion. The third limiting portion and the fourth limiting portion are disposed on the movable member, and the fifth limiting portion is disposed on the driven member. The fifth limiting portion is located between the third limiting portion and the fourth limiting portion along the first direction, and the fifth limiting portion abuts against the third limiting portion and the fourth limiting portion respectively.

[0045] 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 driven member moves in different directions along the first direction, the movable member can be pushed to perform corresponding movements through the mutually contacting surfaces between the fifth limiting portion and the fourth limiting portion or the mutually contacting surfaces between the fifth limiting portion and the third limiting portion.

[0046] Since the three limiting portions are in an interference fit state, even if the driven member has a certain position perturbation in the direction perpendicular to the first direction, the frictional force between the fifth limiting portion and the third limiting portion or the fourth limiting portion is small, and it will not cause the movable member to move deviating from the first direction, thereby making the movement of the movable member more stable.

[0047] In combination with the first aspect, in some implementation manners of the first aspect, the transmission structure includes a third limiting portion, a fourth limiting portion, a fifth limiting portion, and a ball. The third limiting portion and the fourth limiting portion are disposed on the movable member, the fifth limiting portion is disposed on the driven member, the fifth limiting portion is located between the third limiting portion and the fourth limiting portion along the first direction, the third limiting portion and the fifth limiting portion respectively include opposite third surfaces and fourth surfaces, and a ball is included between the fifth limiting portion and the fourth limiting portion.

[0048] In combination with the first aspect, in some implementation manners of the first aspect, the movable member is used to carry an optical element, and the optical element includes a lens, or the optical element includes a lens and a diaphragm.

[0049] In combination with the first aspect, in some implementation manners of the first aspect, the movable member is used to carry an optical element, and the first direction is the axial direction of the first mounting hole.

[0050] The axial direction of the first mounting hole may be the optical axis direction of the optical element carried by the movable member.

[0051] When the first direction is the optical axis direction of the optical element, fine focusing and other operations can be performed.

[0052] In some embodiments, the first direction may also be the direction perpendicular to the optical axis of the optical element, so as to facilitate anti-shake and other operations.

[0053] In a second aspect, a camera module is provided, which includes an optical element and a driving module as described in the first aspect or any implementation manner of the first aspect. The movable member is used to carry the optical element.

[0054] In a third aspect, an electronic device is provided, which includes the driving module as described in the first aspect or any implementation manner of the first aspect, or the camera module as described in the second aspect. Description of the Drawings

[0055] Figure 1 It is a schematic structural diagram of an electronic device to which the embodiments of the present application are applicable.

[0056] Figure 2 It is a schematic structural diagram of a camera module.

[0057] Figure 3 It is a schematic structural diagram of a driving module provided by the embodiments of the present application.

[0058] Figure 4 is Figure 3 A sectional view taken along the B-B section of the driving module shown.

[0059] Figure 5 It is a schematic diagram of a transmission structure provided by the embodiments of the present application.

[0060] Figure 6 It is a schematic structural diagram of a harmonic oscillator provided by the embodiments of the present application.

[0061] Figure 7 It is a schematic structural diagram of another harmonic oscillator provided by the embodiments of the present application.

[0062] Figure 8 It is a schematic structural diagram of the connection relationship among a preloading member, a harmonic oscillator, and a driven member provided by the embodiments of the present application.

[0063] Figure 9 It is a schematic structural diagram of the connection relationship among a preloading member, a harmonic oscillator, and a driven member provided by the embodiments of the present application.

[0064] Figure 10 It is a schematic structural diagram of a driving module provided by the embodiments of the present application. Detailed Embodiments

[0065] The technical solutions in the present application will be described below in conjunction with the accompanying drawings. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means "or". For example, A / B may represent A or B; "and / or" herein is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.

[0066] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this embodiment, unless otherwise specified, the meaning of "a plurality" is two or more than two.

[0067] Figure 1 The embodiments of the present application are applicable to a schematic structural diagram of an electronic device 100. The electronic device 100 can be an electronic device with a camera or photographing function, such as a mobile phone, a tablet computer, a television (or smart screen), a laptop computer, a camera, a video recorder, a camera, etc. For the convenience of understanding, the embodiments of the present application will be described by taking the electronic device 100 as a mobile phone as an example.

[0068] The electronic device 100 may include a display screen 10 and a housing. The housing may include a frame and a rear cover 20. The frame may surround the outer periphery of the display screen 10, and the frame may surround the outer periphery of the rear cover 20. There may be a certain interval between the display screen 10 and the rear cover 20. The display screen 10 may be arranged parallel to the rear cover 20.

[0069] A front camera module (camera compact module, CCM) 110 may be provided on the display screen 10 of the electronic device 100. As shown in the left figure of Figure 1 , the front camera module 110 may be installed in the upper left part of the display screen 10. The front camera module 110 can be used for selfies, for example.

[0070] A rear camera module 120 may be provided on the rear cover 20 of the electronic device 100. As shown in the right figure of Figure 1 , the rear camera module 120 may be installed in the upper left part of the rear cover 20. The rear camera module 120 can be used for shooting the scenes around the electronic device 100, for example.

[0071] It should be understood that Figure 1The installation positions of the front camera module 110 and the rear camera module 120 shown are merely illustrative, and the present application may 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 or upper right of the display screen 10. Another example is that the rear camera module 120 may be installed in the upper middle or upper right of the rear cover 20. Another example is that the front camera module 110 or the rear camera module 120 may be disposed on a movable part within the electronic device 100. By moving the movable part, the movable part can be hidden within the electronic device 100 or can protrude outside the electronic device 100.

[0072] It should be understood that Figure 1 The installation numbers of the front camera module 110 and the rear camera module 120 shown are merely illustrative, and the present application may not limit the installation numbers of the camera modules. The electronic device 100 may include a greater or fewer number of camera modules.

[0073] Figure 2 is a structural schematic diagram of a camera module provided by an embodiment of the present application. The camera module may be Figure 1 the front camera module 110 or the rear camera module 120 of the electronic device shown. The camera module may include a driving 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 Figure 2 Among them, after the external light passes through the light-transmitting holes of the protective cover and the decorative part of the camera module of the electronic device, it can pass through the lens 220 to reach the image sensor 230.

[0074] The lens 220 may include a convex lens and / or a concave lens, mainly used to change the propagation path of the light and converge the external light for imaging. Among them, the lens 220 may be made of glass or plastic, etc.

[0075] 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 the CMOS sensor, it can be specifically based on RGGB or RYYB. Further, the image sensor 230 can be mainly used to receive light from the lens 220 and convert the optical signal into an electrical signal to facilitate the imaging requirements of the camera module. At this time, the image sensor 230 can be disposed opposite to the lens 220 in the optical axis direction of the lens 220.

[0076] The driving module 210 can be a motor, which is used to carry the lens 220 and is set to be able to drive the lens 220, so that the driving module 210 can realize the focusing, anti-shake, zooming, etc. requirements of the lens 220, thereby facilitating the improvement of the imaging effect of the camera module.

[0077] It should be noted that the driving module 210 in the embodiments of the present application can implement one or a combination of functions such as autofocus (AF) and optical image stabilization (OIS) of the camera module.

[0078] Autofocus can refer to using the lens imaging principle and the light reflection principle. The light reflected by the object to be photographed can form an image on the image sensor after passing through the lens array; by moving one or more lenses in the lens array according to the object distance of the object to be photographed, a clear image can be formed on the image sensor. Autofocus can be simply regarded as the movement of the lens array or the lens in the optical axis direction.

[0079] Optical anti-shake can refer to reducing the instrument jitter phenomenon that occurs during the process of capturing optical signals by adjusting the placement angle, placement position, etc. of the lens array, thereby improving the imaging quality. A possible method is to detect the displacement or angle to be compensated through, for example, a gyroscope, and then drive the lens array to translate or rotate through a motor, so as to compensate for the image blur caused by the jitter of the imaging instrument during exposure. Optical anti-shake can be simply regarded as the translation or rotation of the lens array in a plane perpendicular to the optical axis.

[0080] Among them, the embodiments of the present application mainly take the driving module to achieve autofocus as an example for exemplary description.

[0081] Figure 3 It is a schematic structural diagram of a driving module provided by the embodiments of the present application. As Figure 3As shown in the figure, the drive module includes: a fixing member 310, a movable member 320, a driven member 330, a resonator 340, and a preloading member 350. The fixing member 310 includes a first mounting hole 311; the movable member 320 is used to carry an optical element, and the movable member 320 is disposed within the first mounting hole 311; the preloading member 350 is used to cooperate with the resonator 340 to drive the driven member 330 to reciprocate relative to the fixing member 310 in a first direction; when the driven member 330 reciprocates relative to the fixing member 310 in the first direction, the driven member transfers the movement of the driven member 330 in the first direction to the movable member 320 through a transmission structure 322, thereby driving the movable member 320 to reciprocate in the first direction.

[0082] Since the transmission structure in the drive module provided by the embodiments of the present application transfers the movement of the driven member 330 in the first direction, and the movement in other directions will not be transferred to the movable member 320, the stability of the movement of the movable member 320 in the first direction can be improved. In addition, the embodiments of the present application use the piezoelectric principle for driving, with a large driving stroke. Compared with a voice coil motor, problems such as movement instability and inaccuracy caused by magnetic interference can be reduced.

[0083] When the drive 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 ( Figure 3 the x-axis direction in the figure, which is also the axial direction of the first mounting hole).

[0084] The fixing member 310 may include a bracket or a base, or may also include other fixed members (components with unchanged positions) provided on the bracket or the base, and may be a structural member with an unchanged position in the entire drive module. The outer shape of the fixing member 310 may be square, rectangular, circular, or other shaped structures, Figure 3 schematically shown as a rounded square in the figure. The first mounting hole 311 may be a through hole or a blind hole, used to accommodate the movable member 320, and the axis of the first mounting hole 311 may coincide with the optical axis of the optical element carried by the movable member 320.

[0085] The optical element carried by the movable member 320 may be a lens, and the lens may be a single lens or multiple lenses. Alternatively, the optical element carried by the movable member 320 may also be a lens and a diaphragm. When the number of optical elements carried by the movable member 320 is more than one, 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 different optical elements need to move together so that the distance between the different optical elements remains constant.

[0086] The movable member 320 may reciprocate relative to the fixing member 310 in the first direction through a first guiding structure. Figure 3Among them, the first guiding structure includes two groups of guiding structures. The first group of the first guiding structure 3211 includes a first guide shaft 3211-1 and a first groove 3211-2, and the second group of the first guiding structure 3212 includes a second guide shaft 3212-1 and a guiding portion 3212-2. The first guide shaft 3211-1, the second guide shaft 3212-1, the first groove 3211-2, and the guiding portion 3212-2 all extend along the first direction. The two guide shafts can be fixedly connected to the fixing member 310. For example, they can be integrally formed with the fixing member 310, or can be fixed to the fixing member 310 by means of threaded connection, snap connection, etc. Corresponding first grooves 3211-2 corresponding to the first guide shaft 3211-1 and guiding portions 3212-2 corresponding to the second guide shaft 3212-1 can be respectively provided on the outer periphery of the movable member 310. The first groove 3211-2 can be a V-shaped groove shown in the figure or a groove of other shapes, such as a circular groove, a semi-circular groove, etc. The second guide shaft 3212-1 can mainly play a stabilizing role, and the second guide shaft 3212-1 can cooperate with the guiding portion 3212-2 so that the entire movable member 320 will not rotate around the first guide shaft 3211-1 when moving.

[0087] In one embodiment, in order to increase the movement stability of the movable member 320, the driving module can be provided with a second magnetic attraction component, so that the first guide shaft 3211-1 and the first groove 3211-2 are in contact. The second magnetic attraction component can also make the second guide shaft 3212-1 and the guiding portion 3212-2 in contact. For example, a magnetic attraction member can be provided on the fixing member 310, and another magnetic attraction member can be provided on the movable member 320. The acting force between the two magnetic attraction members of the fixing member 310 and the movable member 320 can make the movable member 320 and the fixing member 310 have an axle holding force.

[0088] The acting force between the two magnetic attraction members can be an attractive force. For example, the two magnetic attraction members can be magnets with different polarities, or one of them is a magnet and the other is a ferromagnetic material.

[0089] The acting force between the two magnetic attraction members can also be a repulsive force. For example, the two magnetic attraction members are magnets with the same polarity.

[0090] According to the different types of acting forces between the magnetic attraction members, by setting the positions of the first magnetic attraction member and the second magnetic attraction member, the movable member 320 can generate an axle holding force on the guide shaft of the fixing member 310, so that the reciprocating movement of the movable member 320 along the first direction through the first guiding structure is more stable. Moreover, in scenarios such as the device including this driving module falling, even if the movable member 320 has an off-axis movement, it can return to the initial position under the action of the magnetic attraction force, improving the reliability of the driving module of the embodiment of the present application.

[0091] For example, when the force between the magnetic attraction members is an attractive force, the magnetic attraction members providing the attractive force can be respectively disposed on the first guide shaft 3211-1 and the first groove 3211-2, and on the second guide shaft 3212-1 and the guiding 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 guiding portion 3212-2.

[0092] Again, for example, when the force between the magnetic attraction members is a repulsive force, the magnetic attraction members providing the repulsive force can be respectively disposed on one side of the movable member 320 away from the guide shaft and the corresponding position of the fixed member 310, such as Figure 3 at the position indicated by the dashed box A in the figure, so that the movable member 320 is pushed towards the fixed member 310 by the repulsive force between the magnetic attraction members.

[0093] In one embodiment, the two magnetic attraction members can be installed in the grooves reserved on the guide shaft and the movable member 320. In another embodiment, the guide shaft can be a magnet (as one magnetic attraction member), and the frame of the movable member 320 can be made of ferromagnetic material (as the other magnetic attraction member), so that there can be an attractive force between the movable member 320 and the guide shaft. In another embodiment, the guide shaft can be a magnet (as one magnetic attraction member), and the movable member 320 has a groove for accommodating ferromagnetic material to dispose the magnetic attraction member.

[0094] It should be understood that Figure 3 the form of the first guiding structure and the number of guide shafts in the figure are only schematically shown. For example, when the first guiding structure is a guide shaft-groove combination, it may include only less than or more than two guide shafts. Again, the first guiding structure can also be a slider-guide rail combination, a groove-ball combination, a guide shaft-bushing combination, etc. The present application does not limit the form of the first guiding structure.

[0095] The driven member 330 can reciprocate relative to the fixed member 310 along the first direction through the second guiding structure. Figure 3Among them, the second guiding structure includes two sets of guiding structures. The first set of the second guiding structures 3311 includes a first groove 3311-1 provided on the driven member 330, a second groove 3311-2 provided on the fixed member 310, and a first ball 3311-3; the second set of the second guiding structures 3312 includes a third groove 3312-1 provided on the driven member 330, a fourth groove 3312-2 provided on the fixed member 310, and a second ball 3312-3. The first groove 3311-1 and the second groove 3311-2 can both be V-shaped grooves (the cross-section of the groove is V-shaped), the third groove 3312-1 can be a V-shaped groove, and the fourth groove 3312-2 can be a U-shaped groove (the cross-section of the groove is U-shaped). In this way, the first ball 3311-3 can slide smoothly and precisely in the receiving groove formed by the first groove 3311-1 and the second groove 3311-2, and when the second ball 3312-3 rolls in the receiving groove formed by the third groove 3312-1 and the fourth groove 3312-2, it can fine-tune the disturbance in the non-X-axis direction, thereby reducing the possibility of jamming when the driven member 330 drives the movable member 320 to reciprocate in the first direction.

[0096] In one embodiment, there is a magnetic attraction force between the ball and the receiving groove, so as to facilitate the assembly of the driving module. For example, there is a magnetic attraction force between the ball and the groove provided on the fixed member 310, so that when assembling the driven member 330, the ball can be adsorbed in the groove provided on the fixed member 310.

[0097] Figure 3 It is shown in that the second guiding structure includes two sets of guiding structures. In actual situations, the second guiding structure can also include fewer or more sets of similar guiding structures, that is, include more or fewer balls and corresponding receiving grooves, and the number of balls provided in each receiving groove is not limited to only one, and each receiving groove can include more balls. Moreover, the sliding connecting members applicable in the receiving grooves of the second guiding structure are not limited to balls, for example, they can also be sliders, etc. That is to say, the second guiding structure can be a slider-guide combination, a guide shaft-bushing, a guide shaft-groove combination, etc., and the present application does not make any limitations on this.

[0098] The driven member 330 can transmit the movement of the driven member 330 in the first direction through the transmission structure 322, so that when the driven member 330 reciprocates in the first direction relative to the fixed member 310, the movable member 320 can be driven to move in the first direction through the transmission structure 322.

[0099] Figure 4 (a) of shows Figure 3 a cross-sectional view of the shown driving module along the B-B plane (XY plane), as Figure 4As shown in (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 opposite first and second surfaces, and there is a magnetic attraction force between the first limiting portion 322-1 and the second limiting portion 322-2. In this way, when the driven member 330 moves in the positive X-axis direction, the second surface of the driven member 330 can push the movable member 320 to move in the positive X-axis direction through the first surface; when the driven member 330 moves in the negative X-axis direction, it can rely on the magnetic attraction force with the movable member 320 to attract the movable member 320 to move in the negative X-axis direction, so as to realize the driven member 330 driving the movable member 320 to move. When the driven member 330 drives the movable member 320 to move, the first surface and the second surface can always be in contact.

[0100] Due to machining errors, there will actually be an included angle between the guiding directions of the second guiding structure and the first guiding structure, and due to external vibrations and other reasons, the movement of the driven member 330 may not only include a component along the first direction (X-axis), and there may also be position disturbances in the Y direction or Z direction. And the transmission structure 322 provided in the embodiment of the present application enables the displacements of the driven member 330 in the Y direction and Z direction to be absorbed (for example, the frictional force between the contacting first surface and second surface can be relatively low), and the displacements of the driven member 330 in the Y direction or Z direction may not cause the displacements of the movable member 320 in the Y direction or Z direction, thereby improving the movement stability of the movable member 320.

[0101] In addition, the setting of having a magnetic attraction force between the two limiting portions can enable the attraction force between the two limiting portions to always be along the first direction even if there is a relative displacement in the Y direction or Z direction, further improving the movement stability of the movable member 320 in the technical solution of the embodiment of the present application.

[0102] Figure 3 The transmission structure 322 shown can be a contact drive, and there will be no transmission hysteresis problem. When the movable member 320 is maintained at a fixed position, there is no need to power on, and compared with a voice coil motor drive, it can reduce energy consumption.

[0103] In addition, the transmission structure 322 may further include a blocking mechanism, such as Figure 4 As shown in (b), for example, stoppers 322-11 and 322-21 are respectively provided on the first limiting portion 322-1 and the second limiting portion 322-2. The stoppers can limit the relative displacement between the driven member 330 and the movable member 320 in the Y direction and / or Z direction within a certain range, thereby being able to improve the reliability of the technical solution of the embodiment of the present application. The blocking mechanism is not limited to being provided by stoppers. For example, it can also be provided by means of limit pins, etc. The present application does not make a limitation in this regard.

[0104] In the embodiments of the present application, the transmission structure 322 is not limited to Figure 3 and Figure 4 the form shown in Figure 5 FIG. shows a schematic structural diagram of other forms of the transmission structure 322 provided by the embodiments of the present application. Figure 5 In the shown transmission structure, there may be no magnetic suction force acting between the limiting parts.

[0105] Specifically, as shown in (a) of Figure 5 , a third limiting part 322-3 and a fourth limiting part 322-4 may be provided on the movable part 320, and a fifth limiting part 322-5 may be provided on the driven part 330. The fifth limiting part 322-5 is located between the third limiting part 322-3 and the fourth limiting part 322-4 along the X axis. The third limiting part 322-3 and the fifth limiting part 322-5 may include two corresponding surfaces (the third surface and the fourth surface). An elastic member 322-6 (the second elastic member) may be provided between the fourth limiting part 322-4 and the fifth limiting part 322-5. The elastic member 322-6 may have a relatively large elastic coefficient along the X axis.

[0106] When the driven part 330 moves in the positive direction of the X axis, the driven part 330 may push the movable part 320 to move in the positive direction of the X axis through the surface in contact with the third limiting part 322-3; when the driven part 330 moves in the negative direction of the X axis, the elastic force provided by the compression of the elastic member 322-6 may be used to make the movable part 320 move in the negative direction of the X axis. In order to reduce the degree of hysteresis generated when the movable part 320 moves in the negative direction of the X axis, the elastic member 322-6 may be in a state of storing energy, for example, pre-compressed, so that when the driven part 330 generates a small displacement in the negative direction of the X axis, the movable part 320 can be pushed to move.

[0107] In order to reduce the influence of the displacement of the driven part 330 along the Y axis or the Z axis on the movement stability of the movable part 320, the elastic member 322-6 may have a relatively small elastic coefficient along the Y axis or the Z axis. For example, the elastic coefficient along the Y axis or the Z axis may be much smaller than the elastic coefficient in the X axis direction. Schematically, the elastic coefficient of the elastic member 322-6 along the X axis may be hundreds of times or more of the elastic coefficient along the Y axis or the Z axis.

[0108] The elastic member 322-6 may be an elastic reed, or may also be components such as rubber or a spring. The present application does not make any limitation thereto.

[0109] When the elastic member 322-6 is a spring, the opposite surface of the fourth limiting part 322-4 or the fifth limiting part 322-5 may protrude to form a guide shaft disposed at the axis of the spring, so that when the spring expands and contracts, it can always move along the guide shaft and the inclination degree can be minimized, which is also convenient for the positioning and preloading of the spring.

[0110] Figure 5 The transmission structure 322 shown in (b) compared to Figure 5 In (a), there is no need to provide an elastic member. Instead, the fifth limiting portion 322-5 is directly arranged 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 with the gap between the third limiting portion 322-3 and the fourth limiting portion 322-4, thereby reducing the frictional force 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 driven member 330 along the non-moving direction (non-X-axis direction) on the movement of the moving member 320.

[0111] In this embodiment, when the driven member 330 moves along the negative or positive X-axis direction, the moving member 320 is respectively pushed to move in the corresponding direction through the mutually contacting surfaces with the third limiting portion 322-3 and the mutually contacting surfaces with the fourth limiting portion 322-4.

[0112] Figure 5 In the transmission structure 322 shown in (c), a ball 322-7 can be arranged between the fourth limiting portion 322-4 and the fifth limiting portion 322-5. When the driven member 330 moves along the positive X-axis direction, the moving member 320 can be pushed to move in the positive X-axis direction through the contacting surface with the third limiting portion 322-3; when the driven member 330 moves along the negative X-axis direction, the moving member 320 can be pushed to move in the negative X-axis direction through the ball 322-7. The ball 322-7 can reduce the frictional force between the driven member 330 and the moving member 320, making the movement of the moving member 320 along the first direction more stable.

[0113] The number of the balls 322-7 can be set arbitrarily, and the balls 322-7 can also be replaced with components such as sliders.

[0114] It should be understood that the form of the above transmission structure 322 can be transformed to a certain extent. For example, for Figure 3 and Figure 4 the transmission structure 322, the relative positions of the first limiting member 322-1 and the second limiting member 322-2 on the X-axis can be interchanged. In this way, when the driven member 330 moves along the positive X-axis direction, the moving member 320 can be attracted to move in the positive X-axis direction by magnetic attraction; when the driven member 330 moves along the negative X-axis direction, the moving member 320 can be pushed to move in the negative X-axis direction through the abutting surface.

[0115] And for Figure 5For the transmission structure shown in (a) or (c), the elastic member 322-6 or the ball 322-7 can be arranged between the third limiting portion 322-3 and the fifth limiting portion 322-5. Thus, when the follower 330 moves in the positive X-axis direction, the elastic member 322-6 or the ball 322-7 is used to push the movable member 320 to move. When moving in the negative direction, the movable member 320 is pushed to move through the mutually contacting surfaces.

[0116] Alternatively, two limiting portions can be arranged on the follower 330, and one limiting portion sandwiched between the two limiting portions can be arranged on the movable member 320, and the position of the elastic member 322-6 can be set arbitrarily.

[0117] Alternatively, an elastic member or any number of balls can be arranged between the third limiting portion 322-3 and the fifth limiting portion 322-4, and any number of balls can also be arranged between the fourth limiting portion 322-4 and the fifth limiting portion 322-5. The present application does not make any limitation in this regard.

[0118] For Figure 5 the transmission structure shown in (b), two limiting portions can be arranged on the follower 330, and one limiting portion sandwiched between the two limiting portions can be arranged on the movable member 320.

[0119] In addition, for Figure 4 , Figure 5 the transmission structure 322 shown, a lubricating liquid or the like can also be arranged between the surfaces of the mutually contacting limiting portions, so as to reduce the frictional force between the limiting portions and make the movement of the movable member 320 in the first direction smoother.

[0120] It should also be understood that in addition to Figure 4 and Figure 5 the forms shown, the transmission structure can also be in other forms. For example, matching bumps and concave holes can be arranged on the follower 330 and the movable member 320. The dimensions of the concave hole along the Y-axis and the Z-axis can be larger than the dimensions of the bump along the Y-axis or the Z-axis direction. Thus, the disturbance of the follower 330 along the Y-axis or the Z-axis can be absorbed by the transmission structure, and further the movement stability of the movable member 320 can be improved. The present application does not make any limitation on the form of the transmission structure 322. And, on Figure 5 the transmission structure shown, a stop block similar to Figure 4 shown in (b) can also be arranged, so as to limit the relative displacement between the follower 330 and the movable member 320 along the Y-axis or the Z-axis within a certain range.

[0121] The harmonic oscillator 340 operates based on the inverse piezoelectric effect of piezoelectric materials. The inverse piezoelectric effect means that when an electric field is applied in the polarization direction of a dielectric, these dielectrics can generate mechanical deformation or mechanical stress in a certain direction, and when the external electric field is removed, the deformation or mechanical stress also disappears. In some embodiments, when the piezoelectric material is not powered or the current is very small, the piezoelectric material is in an initial state; when a positive current is applied to the piezoelectric material, the piezoelectric material extends and is in an elongated state; when a negative current is applied to the piezoelectric material, the piezoelectric material contracts and is in a shortened state. That is to say, the piezoelectric material will deform according to the applied electrical signal, and when the electrical signal is an alternating signal, the piezoelectric material can perform cyclic expansion and contraction actions.

[0122] By applying a control signal to the piezoelectric material, the piezoelectric material generates mechanical deformation. When a periodic electrical signal is applied, the piezoelectric material can generate periodic deformation with the periodic electrical signal, thereby performing periodic motion or vibration. The piezoelectric material can be an inorganic piezoelectric material, such as a piezoelectric crystal, a piezoelectric ceramic, etc., or an organic piezoelectric material, such as polyvinylidene fluoride, etc. The present application does not limit the type of piezoelectric material used in the harmonic oscillator 340.

[0123] The harmonic oscillator 340 can include a contact portion 341 and a support portion 342. The contact portion 341 is used to contact other components to provide frictional force as a driving force.

[0124] The contact portion 341 can perform circular arc and elliptical motions following the periodic deformation of the piezoelectric material. By controlling the characteristics of the current of the piezoelectric material and the number of the contact portions 341, the contact portion 341 can perform corresponding-direction motions.

[0125] Figure 6 This is a schematic structural diagram (exploded view) of the harmonic oscillator provided by the embodiments of the present application. The harmonic oscillator 340 can be composed of a piezoelectric material plate (the first piezoelectric plate 343) and a vibrating plate 344. The vibrating plate 344 and the first piezoelectric plate 343 can be combined by means such as gluing and threaded connection. One surface of the vibrating plate 344 protrudes outward to form the contact portion 341. The other part of the vibrating plate 344 except the contact portion 341 and the first piezoelectric plate 343 together form the support portion 342. When the harmonic oscillator 340 operates, the pre-pressure of the pre-pressing member 350 can have a component force along the Y-axis direction (the thickness direction of each plate of the harmonic oscillator 340), so that the contact portion 341 presses tightly against the end face 333 of the driven member 330, and drives the driven member 330 to move along the X-axis direction through frictional force.

[0126] It should be understood, Figure 6Only one contact part 341 is schematically shown. In actual situations, the number of contact parts 341 can be set according to requirements. For example, multiple contact parts can be set, and the movements of different contact parts 341 can be combined, so that the driven part 330 moves in the first direction.

[0127] Figure 6 In the embodiments, the driving force is provided by the plate surface of the resonator 340 and the contact part 341 arranged on the plate surface. In some embodiments, the resonator 340 can still be a plate-like structure as a whole, but the driving force is provided by the side surface of the resonator 340.

[0128] Such as Figure 7 As shown, the resonator 340 can be composed of two piezoelectric material plates (the second piezoelectric plate 345 and the third piezoelectric plate 347) and a vibration plate 346 sandwiched between the two piezoelectric material plates. The piezoelectric material plates and the vibration plate 346 can be combined together by means such as gluing and screw connection. The vibration plate 346 can have a side edge protruding outward to form a contact part 341, and the other parts of the second piezoelectric plate 345, the vibration plate 346 except the contact part 341, and the third piezoelectric plate 347 form a support part 342. When the Figure 7 shown resonator is applied to the Figure 3 shown driving module, when the resonator 340 works, the preloading part 330 can apply a pre-pressure containing 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 part 341 of the resonator 340 abuts against the end surface 333 of the driven part 330. When the contact part 341 moves in the X-axis direction, it can drive the driven part 330 to move in the X-axis direction through friction.

[0129] In Figure 3 the embodiments, the resonator 340 can vibrate according to the applied electrical signal, so that it can drive the driven part 330 through the friction force with the driven part 330 and then drive the movable part 320 to displace. And the disturbances of the driven part 330 in the Y direction and the Z direction can be absorbed by the transmission structure 322 between the driven part 330 and the movable part 320.

[0130] It should be understood that Figure 6 and Figure 7 the schematically shown resonator 340 is provided with a vibration plate. In some embodiments, the resonator 340 can not include a vibration plate, and the contact part is directly arranged on the piezoelectric plate, which can improve the driving efficiency.

[0131] The preloading part 350 can be a rigid component or an elastic component. Figure 3In the driving module shown, the preloading member 350 can be arranged on the fixing member 310. For example, it can be fixedly arranged on the fixing member 310 through connection means such as threaded connectors, adhesives, snap connections, etc. The preloading member 350 can provide a preloading force to the resonator 340, so that the resonator 340 can abut against the driven member 330. By changing the magnitude of the pressure provided by the preloading member 350, the magnitude of the frictional force between the resonator 340 and the driven member 330 can be changed, thereby providing driving forces of different magnitudes for the movement of the driven member 330.

[0132] A friction portion with a relatively large coefficient of friction can be arranged at the contact position of the driven member 330 with the resonator 340. When the resonator 340 vibrates, a driving force can be provided to the driven member 330 through this friction portion.

[0133] Figure 3 In the driving module, the resonator 340 can be fixedly arranged on the preloading member 350 and drive the driven member 330 to move in the X-axis direction, that is, among the preloading member 350, the resonator 340, and the driven member 330, only the driven member 330 is a moving part, and the other two are fixed parts. In some embodiments, in addition to the driven member 330, the resonator 340 and / or the preloading member 350 can also be moving parts. In this case, the driven member 330, the resonator 340, and the preloading member 350 can have different Figure 3 arrangement positions or connection relationships from those shown.

[0134] Figure 8 shows a schematic diagram of the connection relationships of different preloading members, driven members, and resonators provided in the embodiments of the present application. In Figure 8 the X direction is the movement direction of the moving part 320, and the y direction is the direction of the preloading force of the resonator 340.

[0135] In one embodiment, referring to (a) of Figure 8 and (b) of Figure 8 , where Figure 8 (a) of Figure 8 is a schematic diagram on the xy plane, and Figure 8 (b) of Figure 3The similar fixing part is fixedly arranged on the fixing member 310 and can press against the resonator 340 along the Y-axis direction. When the resonator 340 vibrates, the contact part 341 of the resonator 340 can make the resonator 340 reciprocate along the X-axis together with the driven member 330 through the frictional force between the resonator 340 and the friction member 360. Thus, the driven member 330 drives the movable member 320 to move through the transmission structure 322. In this embodiment, the resonator 340 and the driven member 330 are movable members, while the preloading member 350 is a fixed member.

[0136] In another embodiment, in Figure 8 (c) of, the resonator 340 can be fixedly connected to the preloading member 350, but the preloading member 350 can move along the X-axis direction (perpendicular to the paper surface direction) relative to the fixing member 310 through the guiding structure. A friction part 360 can be arranged on the part of the fixing member 310 between the resonator 340 and the driven member. The contact part 341 of the resonator 340 can contact and rub against the friction part 360 through the pressure of the preloading member 350. The preloading member 350 can be connected to the driven member 330 through a spring 370 or other connecting parts (such as a connecting shaft). The spring 370 can pass through the through hole 313 on the fixing member 310 to connect the preloading member 350 and the driven member 330. A guiding structure can be arranged between the driven member 330 and the fixing member 310. In order to reduce the frictional force between the driven member 330 and the fixing member 310, the guiding structure can use a rolling member 380. When the resonator 340 receives an electrical signal and vibrates, the resonator 340 drives the preloading member 350 to move through the frictional force between the resonator 340 and the friction part 360, and then drives the driven member 330 to move. The driven member 330 drives the movable member to move along the X-axis through the transmission structure 322 (the X-axis direction is perpendicular to the paper surface). In this embodiment, the resonator 340, the preloading member 350, and the driven member 330 are all movable members.

[0137] In another embodiment, in Figure 8 (d) of, the resonator 340 is fixedly connected to the fixing member 310. The preloading member 350 and a friction member 360 are fixedly connected and can move integrally along the X-axis direction. The preloading member 350 and the driven member 330 can be connected through a connecting structure 370 to drive the driven member 330 to move through the guiding structure 380. When the resonator 340 works, the friction member 360 and the preloading member 350 are driven by the frictional force to move along the X-axis direction. The preloading member 350 drives the driven member 330 to move through the connecting structure 370. Thus, the movable member 320 can move along the X-axis direction. In this embodiment, the preloading member 350 and the driven member 330 are movable members, while the resonator 340 is a fixed member.

[0138] It should be understood that regardless of the connection relationship among the preloading member, the resonator, and the driven member, one of the resonator 340 and the component in frictional contact with it is a movable member and the other is a fixed member. For example, Figure 3In [description], the resonator 340 is a fixed member, and the member in frictional contact therewith (the follower 330) is a moving member; Figure 8 In (a) and (b) of [description], the resonator 340 is a moving member, and the friction member 360 in frictional contact therewith is a moving member; Figure 8 In (c) of [description], the resonator 340 is a moving member, and the friction portion in frictional contact therewith is located on the fixed member 310 and is a fixed member; Figure 8 In (d) of [description], the resonator 340 is a fixed member, and the friction member 360 in frictional contact therewith is a moving member. Through this moving member, the follower 330 can be directly or indirectly driven to move. For example, the moving member itself can be the follower 330, or the moving member can be a preloading member or a separately provided friction member, and different connection relationships can be set, ultimately driving the follower 330 to move. The friction member can be provided independently of the preloading member 350, the fixed member 310, and the follower 330, or can be a part of the above three members. And, in some embodiments, the preloading member 350 and the follower 330 can also be one member, or the preloading member 350, the follower 330, and the friction member can also be combined into one member, and the present application does not limit this. Figure 3 and Figure 8 The structures schematically shown are only schematic illustrations, and there can be other connection relationships between the follower 330, the preloading member 350, and the resonator 340. For example, in Figure 3 or Figure 6 Based on the schematic diagram, more components can be added or different motion transmission methods can be set, and the present application does not limit this.

[0139] When the resonator 340 provides a driving force through the side, the follower 330 and the preloading member 350 can be combined into one member, and the structure between this member and the resonator 340 can be Figure 9 as shown in [description]. In Figure 9 , the resonator 340 can provide a driving force through two sides, which can improve the driving effect. Two symmetric contact portions 341 protrude from the side of the resonator 340, and the two contact portions 341 are in contact with the preloading member 350. Figure 9 In (a) of [description], the resonator 340 is a fixed member. For example, it can be fixedly connected to the fixed member 310, and drives the preloading member 350 to drive the follower 330 to move through friction, and then drives the moving member to move. Figure 9 In (b) of [description], the resonator 340 is a moving member, and the preloading member 350 is a fixed member. For example, it can be fixedly arranged 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 moving member to move.

[0140] It should be understood that when the driving force is provided to the resonator 340 through two sides, the connection relationship among the resonator 340, the preloading member 350, and the follower 330 can also have other forms. For example, the preloading member 350 and the fixing member 310 can be the same component, and the present application does not limit the relationship among the three.

[0141] It should also be understood that in the foregoing embodiments, only one resonator and one preloading member in the driving module are taken as examples to introduce the technical solutions of the embodiments of the present application. In fact, the driving module can include multiple resonators or multiple preloading members, and the present application does not limit this.

[0142] When the driving module is applied to a camera module, the camera module can further include a position sensor and a control unit. The position sensor can be a Hall position sensor or a TMR sensor. The position sensor and the control unit can be an integrated control IC (integrated circuit). The control unit determines the current position and the target position of the movable member 320. When the current position does not reach the target position, a control instruction can be further triggered to input a corresponding electrical signal to the resonator 340, so that the movable member 320 can finally move to the target position to achieve position closed-loop control.

[0143] In some embodiments, when the transmission structure between the follower 330 and the movable member 320 adopts Figure 4 the structure shown, the movement process of the movable member 320 can be divided into two segments. The first segment does not require precise closed-loop control, while the second segment requires precise and closed-loop control. In the initial state, the movable member 320 may not be in contact with the follower 330, but is kept in the initial state by a pop-up and retraction mechanism. When precise control of the position of the movable member 320 is required, an external force provided by the pop-up and retraction 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 through this mechanism.

[0144] As Figure 10 shown in (a) and (b) of

[0145] The pop-up and retraction mechanism can include a first magnetic attraction assembly and a locking member 3153. The locking member 3153 can be, for example, a stop block or a stop rod, and can move relative to the fixing member 310 along a first direction through a guiding structure. The locking member 3153 can limit the position of the movable member 310 between a first position and a second position, and the locking member 3153 can remain relatively stationary with the movable member 310.

[0145] The locking member 3153 can move from a third position ( Figure 10 the position in (a) of Figure 10 to a fourth position (Figure 10 move from the first position of (a) to Figure 10 the power of the second position of (b)) so that the opposite surfaces of the first limiting part 322-1 and the second limiting part 322-1 change from the separated state to the contacting state. In one embodiment, the first magnetic attraction assembly may include at least a pair of magnetic attraction 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 Figure 10 shown in (a) of, the limiting part 322-1 of the movable member 320 and the limiting part 322-2 of the driven member 330 are in the separated state. When precise control of the movement of the movable member 320 is required, the locking member 3153 can be controlled so that the locking member 3153 moves upward to the fourth position. Thus, the movable member 320 can be pushed upward by the repulsive force between the magnetic attraction members until the limiting part 322-1 of the movable member 320 contacts the limiting part 322-1 of the driven member 330 (at this time, the movable member is in the second position), as Figure 10 shown in (b) of. When the driven member 330 drives the movable member 320 to move subsequently, the locking member 3153 can be controlled to be retracted to a position that does not block the continuous movement of the movable member 310, for example, retracted into the interior of the fixed member 310, or can move upward to the limit of the movement of the movable member 320. When the drive module is no longer used, the locking member 3153 can move downward so that the limiting parts of the movable member 320 and the driven member 330 are separated, and the locking member 3153 and the movable member 320 return to the initial position.

[0146] In another embodiment, the pop-up and press-back mechanism may also only include the first magnetic attraction assembly. The first magnetic attraction assembly may be an electromagnet. By controlling the current direction of the magnet, the polarity of the magnet can be controlled so that there is a repulsive force between the movable member 320 and the fixed member 310, thereby pushing the movable member 320 along the movement direction to make the movable member 320 shake hands with the driven member 330, as Figure 10 shown in (b) of. When shaking hands, the limiting parts between the driven member 330 and the movable member 320 can contact each other. If it is necessary to separate the movable member 320 from the driven member 330, a corresponding operation can be performed by additionally arranging a mechanism, or the magnet can be made to become an attractive force, and the attractive force is relatively large, so that the movable member 320 contacts the fixed member 310.

[0147] As Figure 10As shown in (c) and (d), the pop-up pressing mechanism may also 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, etc. In the initial state, the first elastic component 315 may be pre-compressed, for example, the first elastic component 315 is kept in a force storage compression state by the locking component 3153. When the movement of the movable member 320 needs to be precisely controlled, the locking component 3153 may be controlled to move up, so that the first elastic component 315 pops up, thereby pushing the movable member 320 to shake hands with the follower 330. When the movement of the movable member 320 does not need to be precisely controlled, the movable member 320 may be pressed back to the initial position, for example, by moving the locking component down again. In this way, when the movable member 320 is not needed, the movable member 320 may be separated from the follower 330, thereby reducing the impact on the movement of other components.

[0148] The first elastic member 315 may be fixed at only one end, for example, only one end of the first elastic member 315 may be fixed at Figure 10 The first elastic member 315 is on the movable member 320 in (c), and the end of the first elastic member 315 close to the fixed member 315 can be a free end, but in a compressed state, it is pressed against the end surface of the fixed member 310. When the first elastic member 315 is released so that the two surfaces of the movable member and the driven member contact, the first elastic member 315 can restore its free length, thereby not affecting the movement of the movable member 320 driven by the driven member 330.

[0149] Figure 10 (e) shows a schematic diagram of the initial state when the pop-up pressing mechanism is not used. In the initial state, the follower 330 also needs to contact the movable part through the transmission structure. Due to the limitation of the guide structure of the follower 330, the height of the follower makes the height H1 of the driving module in the initial state greater than Figure 10 The height H shown in (a).

[0150] pass Figure 10 The embodiment shown can reduce the size of the entire module when the driving module is not used, making the device using the driving module more portable. For example, when the driving module is applied to the camera module of an electronic device, only when the user opens the camera application, the pop-up pressing mechanism will release the movable member 320 so that the movable member shakes hands with the driven member through the limit part. When the user is not using it, the two limit parts are in a separated state, thereby reducing the size of the entire electronic device and making the electronic device more portable.

[0151] The foregoing has introduced the technical solutions of the embodiments of the present application by taking the X-axis and the first direction as the optical axis directions as examples. In some embodiments, the first direction may also be a direction perpendicular to the optical axis, so as to achieve an optical image stabilization effect. The structures of the preloading member, the driven member, the resonator, the movable member, and the fixed member, as well as the connection relationships between different components, may refer to the embodiments in which the first direction is the optical axis direction, and will not be elaborated herein.

[0152] The embodiments of the present application further provide a camera module, which includes the driving module, the lens module, and the image sensor introduced above.

[0153] The embodiments of the present application further provide an electronic device, which includes the driving module introduced above or includes the above-mentioned camera module.

[0154] As described above, the foregoing are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A driving module, characterized in that, Comprising: A fixing member (310), a movable member (320), a resonator (340) and a driven member (330); wherein, The fixing member (310) includes 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 relative to the fixing member (310) along a first direction; When the driven member (330) reciprocates relative to the fixing member (310) along the first direction, the driven member (330) transmits the movement of the driven member (330) along the first direction to the movable member (320) through a transmission structure (322), thereby driving the movable member (320) to reciprocate along the first direction.

2. The driving module according to claim 1, wherein The transmission structure (322) includes a first limiting portion (322-1) and a second limiting portion (322-2) sequentially arranged along the first direction. The first limiting portion (322-1) is arranged on the movable member (320), and the second limiting portion (322-2) is arranged on the driven member (330). The first limiting portion (322-1) and the second limiting portion (322-2) respectively include opposite first surfaces and second surfaces. There is a magnetic attraction force between the first limiting portion (322-1) and the second limiting portion (322-2). When the driven member (330) drives the movable member (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, wherein The movable member (320) is used to move from a first position to a second position along the first direction under the action of a pop-up and press-back 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, enabling the transmission structure (322) to transmit the movement of the driven member along the first direction to the movable member (320); or, The movable member (320) is used to move from a second position to a first position along the first direction under the action of a pop-up and press-back 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 separated state, such that the transmission structure (322) cannot transmit the movement of the driven member (330) along the first direction to the movable member.

4. The drive module according to claim 3, wherein, The pop-up and press-back mechanism includes a locking member (3153) and a pop-up member (315). The locking member (3153) is in contact with the movable member (320), and the pop-up member (315) includes a first magnetic attraction assembly (3151, 3152) or a first elastic member; The locking member (3153) is configured to move from a third position to a fourth position along the first direction, so that the movable member (320) can move from the first position to the second position under the action of the ejecting member (315); or, the locking member (3153) is configured to move from the fourth position to the third position along the first direction, so that the movable member (320) can move from the second position to the first position along the first direction under the action of the ejecting member (315).

5. The drive module according to any one of claims 1 to 4, characterized in that The drive module further includes a preloading member (350), the preloading member (350) is configured to provide a preload to the resonator (340), and the resonator (340) is configured to drive the driven member (330) to reciprocate along the first direction under the action of the preload.

6. The drive module according to any one of claims 1 to 5, characterized in that The movable member (320) reciprocates along the first direction through a first guiding structure; the first guiding structure includes a first guide shaft (3211-1) and a first groove (3211-2) that cooperates 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 fixing member (310) and the movable member (320) and extend along the first direction.

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

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

9. The drive module according to any one of claims 1 to 8, characterized in that, The driven member (330) reciprocates along the first direction through a second guiding structure, and the second guiding structure includes a first groove body (3311-1) arranged on the driven member (330), a second groove body (3311-2) arranged on the fixing member (310), and a sliding connecting member. The first groove body (3311-1) and the second groove body (3311-2) are arranged opposite to each other and form a receiving groove for receiving the sliding connecting member, and the receiving groove extends along the first direction.

10. The drive module according to claim 9, wherein The sliding connecting member is a ball.

11. The drive module according to any one of claims 1 to 10, characterized in that, The drive module further includes a friction member, the resonator (340) is a fixed member, the friction member is a moving member, and when the resonator (340) vibrates, it drives the driven member (330) to reciprocate along the first direction through the frictional force between the resonator (340) and the friction member.

12. The drive module according to claim 5, characterized in that, The resonator (340) is a fixed member, the resonator (340) is fixedly arranged on the fixing member (310) through the preloading member (350), and the resonator (340) is configured to drive the driven member (330) to reciprocate along the first direction through the frictional force between the resonator (340) and the driven member (330).

13. The drive module according to any one of claims 1 to 10, characterized in that, The driving module further includes a friction member. The resonator (340) is a moving member. The friction member is fixed to the fixed member (310). When the resonator (340) vibrates, it drives the resonator (340) and the driven member (330) to reciprocate along the first direction through the frictional force between the friction member and the resonator (340).

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

15. The drive module according to claim 1, characterized in that, The transmission structure (322) includes a third limiting portion (322-3), a fourth limiting portion (322-4), a fifth limiting portion (322-5), and a second elastic member (322-6). The third limiting portion (322-3) and the fourth limiting portion (322-4) are disposed on the movable member (320). The fifth limiting portion (322-5) is disposed 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 include a third surface and a fourth surface disposed opposite to each other. The second elastic member (322-6) is included between the fifth limiting portion (322-5) and the fourth limiting portion (322-4).

16. The drive module according to claim 1, wherein, The transmission structure (322) includes 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 disposed on the movable member (320). The fifth limiting portion (322-5) is disposed 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) is respectively in contact with the third limiting portion (322-3) and the fourth limiting portion (322-4).

17. The drive module according to claim 1, wherein, The transmission structure (322) includes 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 disposed on the movable member (320). The fifth limiting portion (322-5) is disposed 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 include a third surface and a fourth surface disposed 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 drive 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 a diaphragm.

19. The drive 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 includes an optical element and the driving module according to any one of claims 1 to 19, and the movable member (320) is used to carry the optical element.

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

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