Lens drive device and telephoto camera module

Abstract

A lens drive device (22) and a telephoto camera module (1). The lens drive device (22) comprises: a fixing base (222); a movable carrier (223), which is configured to carry an optical lens (21), the optical lens (21) defining an optical axis, and the movable carrier (223) being movably arranged in the fixing base (222); a drive assembly (224), which is connected to the fixing base (222) and abuts against the movable carrier (223), applies a pre-pressing force to the movable carrier (223), and is adapted to, upon receiving a drive signal, drive the movable carrier (223) to move relative to the fixing base (222); a guide assembly (225), which is clamped between the fixing base (222) and the movable carrier (223) and is in contact with the opposite surfaces of the fixing base (222) and the movable carrier (223); and an auxiliary positioning assembly (226), which is arranged between the fixing base (222) and the movable carrier (223), wherein when the movable carrier (223) is driven to move along the optical axis, the auxiliary positioning assembly (226) is not in contact with at least one of the fixing base (222) and the movable carrier (223).

Description

Lens driving device and telephoto camera module Technical Field

[0001] The present application relates to the technical field of camera modules, and in particular to a lens driving device and a telephoto camera module. Background Art

[0002] With the improvement of living standards, consumers have higher and higher requirements for the camera functions of mobile phones, tablets and other terminal devices. They not only require effects such as background blur and night shooting, but also have demands for telephoto. Consumers need terminal devices that can clearly capture distant scenes.

[0003] To achieve the aforementioned telephoto function, a telephoto camera module is typically used. In this module, a motor drives the lens to move, enabling focus and / or zoom functions, thereby clearly capturing subjects at a greater distance. However, due to increasing consumer demand, the specifications of telephoto camera modules are constantly increasing, and the size and weight of the lenses are constantly increasing. This also places increasing demands on the thrust of the motors that drive the lenses, leading to an increase in the size of the motors. Furthermore, existing electromagnetic motor solutions have a short stroke, are large in size, and are subject to electromagnetic interference, making it difficult to meet the lens movement requirements for telephoto photography.

[0004] Therefore, the present application provides a new design to avoid the above problems. Summary of the Invention

[0005] One purpose of the present application is to provide a lens driving device and a telephoto camera module, which overcome the shortcomings of the existing technology and meet consumers' needs for focus function and / or zoom function.

[0006] According to one aspect of the present application, a lens driving device is provided, comprising:

[0007] Fixed base;

[0008] A movable carrier, used for carrying an optical lens, wherein the optical lens defines an optical axis, and the movable carrier is movably disposed in the fixed base;

[0009] a driving assembly connected to the fixed base and abutting against the movable carrier to apply a pre-pressure to the movable carrier and adapted to drive the movable carrier to move relative to the fixed base upon receiving a driving signal;

[0010] a guide assembly, the guide assembly being clamped between the fixed base and the movable carrier and maintaining contact with opposing surfaces of the fixed base and the movable carrier;

[0011] The auxiliary positioning component is arranged between the fixed base and the movable carrier. When the movable carrier is driven to move along the optical axis, the auxiliary positioning component does not contact at least one of the fixed base and the movable carrier.

[0012] According to one aspect of the present application, a lens driving device is provided, comprising:

[0013] Fixed base;

[0014] A movable carrier, used for carrying an optical lens, wherein the lens defines an optical axis, and the movable carrier is movably disposed in the fixed base;

[0015] a driving assembly adapted to drive the movable carrier to move relative to the fixed base along the optical axis upon receiving a driving signal; the driving assembly comprising an actuating component and a pre-pressing component, the pre-pressing component being connected to the fixed base, the actuating component being connected to the pre-pressing component, the pre-pressing component providing a pre-pressure to the actuating component so as to cause the actuating component to abut against the movable carrier;

[0016] The pre-stressing component includes a fixed portion, an elastic portion, and a bent portion connecting the fixed portion and the elastic portion. The plane where the fixed portion is located and the plane where the elastic portion is located are parallel to each other and have a certain distance between them. The plane where the bent portion is located intersects with the plane where the fixed portion is located and the plane where the elastic portion is located, respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic structural diagram of a telephoto camera module;

[0018] 2A to 2D are schematic structural diagrams of a piezoelectric vibrator according to an embodiment of the present application;

[0019] 3A and 3B are schematic structural diagrams of a pre-pressing component according to an embodiment of the present application;

[0020] 4A and 4B are schematic structural diagrams of another pre-pressing component according to an embodiment of the present application;

[0021] FIG4C is a schematic diagram showing the relationship between the preload and deformation of the preload component according to an embodiment of the present application;

[0022] FIG5A is a schematic structural diagram of a guide assembly and a movable carrier according to an embodiment of the present application;

[0023] FIG5B is a schematic structural diagram of another guide assembly and a movable carrier according to an embodiment of the present application;

[0024] 6A and 6B are exploded views of a telephoto camera module according to an embodiment of the present application;

[0025] FIG7 is a cross-sectional schematic diagram of a telephoto camera module according to an embodiment of the present application;

[0026] FIG8 is a schematic cross-sectional view of a rolling assembly according to an embodiment of the present application;

[0027] FIG9 is a cross-sectional schematic diagram of another telephoto camera module according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0029] The term "comprising" is open ended. As used in the appended claims, the term does not exclude additional structures or steps.

[0030] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, the directions and positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0031] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0032] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0033] It should be noted that, as used in this application, the terms "substantially," "approximately," and similar terms are used as terms of approximation, not as terms of degree, and are intended to account for inherent deviations in measurements or calculations that would be recognized by a person of ordinary skill in the art.

[0034] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections, contact connections, or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0035] Various units, circuits, or other components may be described or stated as being "configured to" perform one or more tasks. In such contexts, "configured to" is used to imply a structure (e.g., a circuit) that performs the one or more tasks during operation by indicating that the unit / circuit / component includes that structure. Additionally, "configured to" may include general structures (e.g., general circuits) manipulated by software and / or firmware to operate in a manner capable of performing the one or more tasks to be addressed. "Configured to" may also include adjusting a manufacturing process (e.g., a semiconductor fabrication facility) to manufacture a device (e.g., an integrated circuit) suitable for implementing or performing the one or more tasks.

[0036] The terms used in this description are only for the purpose of describing specific embodiments and are not intended to be limiting. As used in the specification and the appended claims, the singular forms "a", "an" and "the" are intended to also encompass the plural form, unless the context clearly indicates otherwise. It will also be understood that the terms "and / or" used herein refer to and encompass any and all possible combinations of one or more items in the items listed in association. It will also be understood that the terms "comprises" and / or "comprising" when used in this specification specify the presence of stated features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or their groupings.

[0037] As used herein, the term "if" may be interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined that" or "if [stated condition or event] is detected" may be interpreted to mean "upon determining that" or "in response to determining that" or "upon detecting [stated condition or event]" or "in response to detecting [stated condition or event]," depending on the context.

[0038] In the present application, a telephoto camera module 1 is provided, as shown in Figure 1, which includes: a light deflection module 10, a lens module 20 and a photosensitive module 30. The light deflection module 10 is located at the front end of the telephoto camera module 1 to reflect the incident light of the object and change the propagation direction of the light; the lens module 20 is located between the light deflection module 10 and the photosensitive module 30. The light emitted by the light deflection module 10 passes through the lens module 20 and reaches the photosensitive module 30, and is imaged by the photosensitive module 30.

[0039] In some embodiments, the light deflection module 10 includes a reflective element 11 and a reflective element carrier 12. The reflective element 11 can be a reflector or a prism to reflect the light vertically entering the telephoto camera module 1 at 90 degrees, so as to convert the light propagating along the first direction into light propagating along the second direction and be absorbed into the telephoto camera module 1. The reflective element 11 is placed in the reflective element carrier 12 and supported by the reflective element carrier 12. In some embodiments, the reflective element 11 also includes a driving element (not shown), which is disposed on the reflective element carrier 12. The driving element drives the reflective element 11 to rotate or translate, thereby realizing the optical image stabilization function of the telephoto camera module 1.

[0040] In some embodiments, the photosensitive module 30 includes a chip circuit board 31, a photosensitive chip 32, at least one electronic component 33, a filter element 35, and a filter element bracket 34. The photosensitive chip 32 is disposed on the chip circuit board 31 and electrically connected to the chip circuit board 31. The filter element bracket 34 is disposed on the chip circuit board 31 and is located on the peripheral side of the photosensitive chip 32. The filter element 35 is mounted on the filter element bracket 34 to be maintained in the photosensitive path of the photosensitive chip 32, and is used to filter the imaging light that is about to enter the photosensitive chip 32. At least one electronic component 33 is disposed on the chip circuit board 31 and electrically connected to the chip circuit board 31. The photosensitive chip 32 includes a photosensitive area and a non-photosensitive area surrounding the photosensitive area.

[0041] In a specific example of the present application, the filter element holder 34 is implemented as a separately molded plastic holder, which is attached to the surface of the chip circuit board 31 via an adhesive and is used to support the filter element 35. Of course, in other examples of the present application, the filter element holder 34 can be implemented as a molded base, which is integrally formed at a predetermined position on the chip circuit board 31 through a molding process, and this application is not limited to this.

[0042] In some embodiments, the lens module 20 includes a lens driving device 22 and an optical lens 21, wherein the optical lens 21 is disposed in the lens driving device 22 and is adapted to be driven by the lens driving device 22, the optical lens 21 defines an optical axis, and the lens driving device 22 is configured to drive the optical lens 21 to move along the optical axis to achieve optical focus and / or optical zoom functions, wherein the optical axis direction is a second direction. It should be understood that in a specific example of the present application, the number of optical lenses 21 can be one, and one optical lens 21 can be driven to move along the optical axis to achieve the optical focus function; in some embodiments, the number of optical lenses 21 can be two, wherein one of the two optical lenses 21 can be fixed, and the other optical lens 21 can be driven to move along the optical axis to achieve the optical focus and optical zoom functions. Of course, in this example, both optical lenses 21 can also be driven to move along the optical axis to achieve optical focus and optical zoom functions; in some embodiments, the number of optical lenses 21 can be three, wherein two of the three optical lenses 21 can be fixed, and the other optical lens 21 can be driven to move along the optical axis to achieve optical focus and optical zoom functions. Of course, in this example, one of the three optical lenses 21 can be fixed, and the other two optical lenses 21 can be driven to move along the optical axis to achieve optical focus and optical zoom functions; in other specific examples of the present application, the number of optical lenses 21 can also be four, five, etc., and is not limited to the present application.

[0043] In some embodiments, the lens module 20 includes two optical lenses 21, such as a focus lens 21a and a zoom lens 21b, and the number of lens driving devices 22 corresponds to the number of optical lenses 21, that is, the number of lens driving devices 22 is the same as the number of optical lenses 21, so as to drive the focus lens 21a and the zoom lens 21b to move along the optical axis direction to realize the optical focus and optical zoom functions of the telephoto camera module 1.

[0044] Specifically, as shown in Figures 3A to 7, the lens driving device 22 includes a fixed base 222, a movable carrier 223, a driving component 224, a guide component 225 and a conductive component 227, wherein the movable carrier 223 is used to carry the optical lens 21, the optical lens 21 defines an optical axis, and the movable carrier 223 is movably arranged in the fixed base 222; the driving component 224 is connected to the fixed base 222 and abuts against the movable carrier 223, applying a pre-pressure to the movable carrier 223, and is suitable for driving the movable carrier 223 to move relative to the fixed base 222 along the optical axis direction when receiving a driving signal, so as to drive the optical lens 21 to move along the optical axis direction to achieve optical focus function and / or optical zoom function. Among them, the movable carrier 223 has an abutting surface facing the driving component 224, and the driving component 224 abuts against the abutting surface of the movable carrier 223; the guide component 225 is clamped between the fixed base 222 and the movable carrier 223, and maintains contact with the opposite surfaces of the fixed base 222 and the movable carrier 223 to provide support and guidance for the movable carrier 223; the conductive component 227 is arranged on the side of the driving component 224 away from the movable carrier 223, and the conductive component 227 is electrically connected to the driving component 224 to achieve circuit conduction of the driving component 224.

[0045] In some embodiments, the number of movable carriers 223 is at least one. For example, the movable carrier 223 includes a first carrier 223a and a second carrier 223b, wherein the zoom lens 21b is fixed in the first carrier 223a, and the focus lens 21a is fixed in the second carrier 223b. The first carrier 223a and the second carrier 223b are movably disposed in sequence along the optical axis within the fixed base 222. In accordance with the number of movable carriers 223, the number of driving components 224 is at least one. For example, the driving components 224 include a first driving component 224a and a second driving component 224b, wherein the first driving component 224a is configured to drive the first carrier 223a to move along the optical axis, and the second driving component 224b is configured to drive the second carrier 223b to move along the optical axis. The number of the guide assembly 225 is at least one, for example, the guide assembly 225 includes a first guide assembly and a second guide assembly, wherein the first guide assembly provides support and guidance for the movement of the first carrier 223a, and the second guide assembly provides support and guidance for the movement of the second carrier 223b.

[0046] In some embodiments, the first carrier 223a and the second carrier 223b have the same structure, the first drive component 224a and the second drive component 224b have the same structure, and the first guide component and the second guide component have the same structure. To avoid redundancy, in this application, only one movable carrier 223, one drive component 224 and one guide component 225 are introduced.

[0047] The driving assembly 224 is specifically implemented as a piezoelectric actuator. In some specific embodiments, the driving assembly 224 includes a pre-pressing component 2241 and an actuating component 2242. The pre-pressing component 2241 is connected to the fixed base 222, and the actuating component 2242 is connected to the pre-pressing component 2241. The pre-pressing component 2241 provides a pre-pressure to the actuating component 2242, causing the actuating component 2242 to abut against the abutting surface of the movable carrier 223. The pre-pressure allows the guide assembly 225 to be clamped between the movable carrier 223 and the fixed base 222.

[0048] Specifically, as shown in Figures 2A to 2D, the actuating component 2242 includes a piezoelectric vibrator 22421 and a friction head 22422. The piezoelectric vibrator 22421 is connected to the preload component 2241. The friction head 22422 is fixed to the side of the piezoelectric vibrator 22421 facing the movable carrier 223. Under the action of the preload, the friction head 22422 abuts the side wall of the movable carrier 223. In other words, the friction head 22422 and the preload component 2241 are respectively arranged on opposite sides of the piezoelectric vibrator 22421, and the abutting surface of the movable carrier 223 is in frictional contact with the friction head 22422. The piezoelectric vibrator 22421 is a substrate that exhibits the inverse piezoelectric effect and contracts or expands depending on the polarization direction and the direction of the electric field. It can be used by polarizing the substrate in the thickness direction of single crystal, polycrystalline ceramics, polymers, etc. The inverse piezoelectric effect refers to the mechanical deformation of a dielectric when an electric field is applied in the polarization direction of the dielectric to generate a potential difference. The piezoelectric vibrator 22421 has the function of ultrasonic oscillation, and can realize oscillatory reciprocating motion or elliptical motion on a specifically set electrode layer, thereby driving the friction head 22422 to perform oscillatory reciprocating motion or elliptical motion, and then through the friction between the friction head 22422 and the side wall of the movable carrier 223, the movable carrier 223 is driven to move relative to the fixed base 222. In other words, the driving force can actually be understood as the friction between the friction head 22422 and the movable carrier 223.

[0049] The present application does not impose any specific restrictions on the specific shape of the friction head 22422. In specific examples, the shape of the friction head 22422 can be a sphere, a hemisphere, a cuboid, a platform, a cylinder, a semi-cylinder, and the like. In one example of the present application, the friction head 22422 is cylindrical in shape, and the cylindrical friction head 22422 is placed vertically as shown in Figures 2A to 2C, or placed horizontally on the piezoelectric vibrator 22421 as shown in Figure 2D. The friction head 22422 placed vertically on the piezoelectric vibrator 22421 is in surface contact with the movable carrier 223, resulting in a larger contact area. This results in greater friction between the friction head 22422 and the movable carrier 223, resulting in better driving force and driving effect. Furthermore, when the movable carrier 223 is actuated over a long stroke, the force point of the movable carrier 223 can be prevented from shifting and tilting.

[0050] The number of friction heads 22422 can be one or two or more. In some embodiments, the piezoelectric vibrator 22421 is in the shape of a rectangular strip, and the friction head 22422 is protruding from the side of the piezoelectric vibrator 22421 facing the movable carrier 223. There are two friction heads 22422, which are spaced apart along the length of the piezoelectric vibrator 22421. The length of the piezoelectric vibrator 22421 is parallel to the direction of motion of the movable carrier 223 driven by the friction head 22422. Compared to a single friction head 22422 driving the movable carrier 223 to move, the two friction heads 22422 can cooperate with each other to achieve long-stroke movement of the movable carrier 223.

[0051] Furthermore, the two friction heads 22422 can be respectively positioned near the ends of the piezoelectric vibrator 22421 along the length direction, as shown in Figures 2A and 2B ; or, the two friction heads 22422 can be respectively positioned near the middle of the piezoelectric vibrator 22421 along the length direction, as shown in Figure 2C . The positions of the friction heads 22422 can be coordinated with the mode of the piezoelectric vibrator 22421. The piezoelectric vibrator 22421 bends and vibrates in a mode with one crest and one trough in its thickness direction, and the friction heads 22422 at the corresponding positions can be located at the crest and trough positions.

[0052] In some embodiments, the friction head 22422 is made of wear-resistant materials, for example, it can be made of various high-hardness wear-resistant ceramic materials, such as aluminum oxide, zirconium oxide, silicon carbide ceramics, or high-wear-resistant metal materials, carbon fiber materials, or composite materials of ceramics, metal particles and polymers, etc., so as to improve the wear resistance of the friction head 22422, which is beneficial to increase the friction between the movable carrier 223 and the friction head 22422, that is, it is beneficial to increase the driving force, and due to its wear resistance, it is beneficial to extend the service life of the friction head 22422.

[0053] In some embodiments, the friction head 22422 and the piezoelectric vibrator 22421 can be an integrated structure or a detachable structure. The friction head 22422 and the piezoelectric vibrator 22421 can be fixed to the piezoelectric vibrator 22421 by bonding, snapping, nesting, welding or fastener connection. The friction head 22422 and the piezoelectric vibrator 22421 are in surface contact to ensure the connection strength. The friction head 22422 can produce obvious movement with the deformation of the piezoelectric vibrator 22421.

[0054] For ease of description, the thickness direction of the piezoelectric vibrator 22421 is defined as the vertical direction, also referred to as the third direction; the length direction of the piezoelectric vibrator 22421 is defined as the horizontal direction, also referred to as the second direction; and the width direction is defined as the front-back direction, also referred to as the first direction. Any two of the first, second, and third directions are perpendicular to each other, and the second direction is the optical axis direction.

[0055] In some embodiments, in order to improve the driving performance of the driving component 224, the piezoelectric vibrator 22421 can be made of piezoelectric ceramic material or piezoelectric single crystal material. The piezoelectric vibrator 22421 can be a single-layer ceramic body or a single-layer single crystal, or a multi-layer ceramic body or a multi-layer single crystal, for example, lead zirconate titanate (PZT)-based piezoelectric ceramics, potassium sodium niobate (KNN)-based piezoelectric ceramics, barium titanate (BT)-based piezoelectric ceramics, lead magnesium niobate-lead indium niobate (PMN-PT)-based piezoelectric single crystals, etc.

[0056] In a specific example of the present application, the piezoelectric vibrator 22421 has a multi-layer stacked structure. Specifically, the piezoelectric vibrator 22421 is stacked in the order of a ceramic layer (not shown), an electrode layer (not shown), a ceramic layer, an electrode layer...a ceramic layer, an electrode layer, and a ceramic layer, with each electrode layer disposed between two adjacent ceramic layers. The ceramic layers deform (elongate or contract) under the action of the electric field of the adjacent electrode layers. By providing multiple electrode layers, the voltage required to drive the bending vibration of the piezoelectric vibrator 22421 is reduced. The number of electrode layers and ceramic layers is selected based on specific requirements.

[0057] For example, the number of ceramic layers is greater than or equal to the number of electrode layers. The ceramic layers are made of a ceramic material exhibiting a piezoelectric effect, such as PZT piezoelectric ceramics; the electrode layers are made of a conductive material, such as copper, gold, silver, or a silver alloy. The multilayer ceramic layers and multilayer electrode layers can be secured together using a ceramic co-firing process, where a layer of ceramic slurry is laid, followed by a layer of electrode slurry, and then the layers are heated and fired together to form a laminated piezoelectric vibrator 22421.

[0058] To facilitate electrical connection between the multi-layer electrode layers on the piezoelectric vibrator 22421 and an external device, electrical connection is established between the piezoelectric vibrator 22421 and the external device through a side electrical conductive portion 224211. In some embodiments, the piezoelectric vibrator 22421 includes a first end surface 22421a for disposing the friction head 22422, a second end surface 22422b opposite the first end surface 22421a, and four side surfaces 22423c located between the first end surface 22421a and the second end surface 22422b. The side electrical conductive portions 224211 are provided on at least a portion of two opposing side surfaces 22423c of the piezoelectric vibrator 22421 along its length, thereby enabling electrical connection between the piezoelectric vibrator 22421 and the external device through the side surfaces 22423c of the piezoelectric vibrator 22421. Of course, the side electrical conductive portion 224211 may also be provided on at least a portion of the second end surface 22422b to facilitate electrical conduction between the piezoelectric vibrator 22421 and the conductive component 227. The side electrical conductive portion 224211 is made of a material suitable for conducting electricity, such as copper, gold, silver, or a silver alloy.

[0059] Of course, the side electrical conductive portion 224211 can be provided at different locations on the piezoelectric vibrator 22421. For example, as shown in FIG2A , the side electrical conductive portion 224211 includes four side electrical connecting portions 224211a. In one example, the four side electrical connecting portions 224211a are provided on two opposing side surfaces 22423c along the length of the piezoelectric vibrator 22421, respectively. This allows the piezoelectric vibrator 22421 to be electrically connected to the conductive component 227 from the side surfaces 22423c of the piezoelectric vibrator 22421, thereby further electrically connecting the piezoelectric vibrator 22421 to an external device from the side surfaces 22423c of the piezoelectric vibrator 22421. In this example, the four side electrical connecting portions 224211a are provided near both ends of the piezoelectric vibrator 22421 along the length to facilitate electrical conduction between the side electrical connecting portions 224211a and the power supply.

[0060] 2B , the side electrical connection portion includes three side electrical connection portions 224211a. In some embodiments, two of the three side electrical connection portions 224211a are respectively disposed on two opposite side surfaces 22423c along the length direction of the piezoelectric vibrator 22421, and another of the three side electrical connection portions 224211a is disposed on the second end surface 22422b of the piezoelectric vibrator 22421. This allows the piezoelectric vibrator 22421 to be electrically connected to the conductive component 227 from the side surface 22423c and the second end surface 22422b of the piezoelectric vibrator 22421, thereby electrically connecting the piezoelectric vibrator 22421 to an external device from the side surface 22423c of the piezoelectric vibrator 22421. In this example, the three side electrical connections 224211a are positioned near the middle of the piezoelectric vibrator 22421 along its length. That is, the side electrical conductive portions 224211 and the friction head 22422 do not overlap along the thickness direction of the piezoelectric vibrator 22421. This allows the three side electrical connections 224211a to avoid the peaks and troughs of the bending vibration of the piezoelectric vibrator 22421. This prevents the formation of cold solder joints between the conductive component 227 and the piezoelectric vibrator 22421. This prevents a short circuit or open circuit between the conductive component 227 and the piezoelectric vibrator 22421 during bending vibration, which could cause the piezoelectric vibrator 22421 to cease functioning.

[0061] It should be understood that in the present application, the conductive component 227 can be disposed on the second end surface 22422b of the piezoelectric vibrator 22421 to electrically connect to the piezoelectric vibrator 22421 of the actuator 2242 to provide power and drive signals to the piezoelectric vibrator 22421. Of course, the conductive component 227 can be directly electrically connected to the mainboard of the electronic device, or it can extend toward the photosensitive module 30 to be electrically connected to the chip circuit board 31. Specifically, the conductive component 227 is a flexible printed circuit board, or FPC.

[0062] It should be understood that the aforementioned arrangement of multiple electrode layers can also be used to polarize the multilayer ceramic layers disposed between the multiple electrode layers by providing power to the multiple electrode layers. In one specific example, the side electrical connection portion 224211a is connected to a positive power supply voltage and a negative power supply voltage, respectively, thereby providing a positive voltage to at least one electrode layer in the multilayer electrode layers and a negative voltage to at least one electrode layer in the multilayer electrode layers, thereby polarizing the multilayer ceramic layers disposed between the multiple electrodes. After polarization, the piezoelectric ceramics automatically align in the polarization direction, forming a piezoelectric structure.

[0063] As shown in Figures 3A to 4B and 7, in some embodiments, the actuating component 2242 is fixed to the fixed base 222 via a pre-pressing component 2241. The pre-pressing component 2241 applies a pre-pressure to the actuating component 2242 toward the movable carrier 223. The pre-pressure can ensure that the movable carrier 223 and the friction head 22422 of the actuating component 2242 always maintain frictional contact. It should be understood that the pre-pressing component 2241 can be implemented as a spring, or the pre-pressing component 2241 can also be implemented as elastic glue.

[0064] In the present application, the pre-stressing component 2241 is implemented as a spring clip for introduction. The pre-stressing component 2241 applies appropriate pre-stress to the actuating component 2242 through the reaction force of its elastic deformation. That is, the pre-stressing component 2241 applies a force toward the movable carrier 223 to the actuating component 2242 with a predetermined pre-stress to keep the friction head 22422 always in contact with the movable carrier 223, that is, the friction head 22422 and the movable carrier 223 always maintain friction contact.

[0065] In some embodiments, the pre-stressing component 2241 includes a fixed portion 22411, an elastic portion 22412, and a bending portion 22413 connecting the fixed portion 22411 and the elastic portion 22412. The plane where the fixed portion 22411 is located and the plane where the elastic portion 22412 is located are parallel to each other and have a certain distance between them. The plane where the bending portion 22413 is located intersects with the plane where the fixed portion 22411 and the plane where the elastic portion 22412 are located.

[0066] The fixing portion 22411 includes a first fixing portion 22411a and a second fixing portion 22411b. The elastic portion 22412 extends along the second direction and is connected to the first fixing portion 22411a and the second fixing portion 22411b via a bent portion 22413. The fixing portion 22411 is fixed to the fixing base 222, and the elastic portion 22412 is connected to the second end surface 22422b of the piezoelectric vibrator 22421 to provide preload pressure on the friction head 22422 disposed on the piezoelectric vibrator 22421 to abut against the movable carrier 223. It should be understood that the fixing portion 22411 and the fixing base 222 can be fixed by welding, riveting, or bonding. Furthermore, when the conductive component 227 is arranged on the second end surface 22422b of the piezoelectric vibrator 22421, the elastic portion 22412 can be arranged on the side of the conductive component 227 away from the piezoelectric vibrator 22421, that is, the conductive component 227 is arranged between the piezoelectric vibrator 22421 and the elastic portion 22412, so as to facilitate the assembly of the driving component 224.

[0067] Along the third direction, i.e., perpendicular to the optical axis, the elastic portion 22412 covers the second end surface 22422b of the piezoelectric vibrator 22421. In other words, at least a portion of the elastic portion 22412 overlaps the second end surface 22422b. This allows the second end surface 22422b of the piezoelectric vibrator 22421 to be supported by the elastic portion 22412, maintaining the piezoelectric vibrator 22421 on a flat surface and preventing uneven preload. In other words, the area of ​​the elastic portion 22412 is no less than the area of ​​the second end surface 22422b of the piezoelectric vibrator 22421.

[0068] Furthermore, the elastic portion 22412 includes a bonding portion 224121 and a deformation portion 224122. Along a direction perpendicular to the optical axis, for example, the third direction, the bonding portion 224121 overlaps with the second end face 22422b to fix the piezoelectric vibrator 22421 to the elastic portion 22412, and the deformation portion 224122 does not overlap with the second end face 22422b to produce pre-pressure on the actuating component 2242 by elastic deformation.

[0069] Specifically, along the third direction, adhesive is applied to the portion where the elastic portion 22412 overlaps the second end surface 22422b of the piezoelectric vibrator 22421 to secure the piezoelectric vibrator 22421 to the elastic portion 22412. Specifically, the adhesive portion 224121 is the portion where the elastic portion 22412 overlaps the second end surface 22422b of the piezoelectric vibrator 22421. This allows the portion of the elastic portion 22412 that does not overlap the second end surface 22422b of the piezoelectric vibrator 22421 to elastically deform, thereby generating a preload on the actuating component 2242. Specifically, the deformable portion 224122 is the portion where the elastic portion 22412 does not overlap the second end surface 22422b of the piezoelectric vibrator 22421. The longer the deformable portion 224122 is along the second direction, the smaller the K value (stiffness or elastic modulus) of the elastic portion 22412, making it easier for the elastic portion 22412 to elastically deform. Furthermore, the K value can be lowered by reducing the area, for example, by hollowing out. Specifically, the deformed portion 224122 of the elastic portion 22412 has a hollow structure to reduce the area of ​​the deformed portion 224122. The thinner the material of the deformed portion 224122, the smaller the K value of the elastic portion 22412.

[0070] In some embodiments, the elastic portion 22412 has a relatively small K value, allowing it to deform. This reduces variations in preload due to material and assembly tolerances in the contact system comprised of the movable carrier 223, the actuating component 2242, and the elastic portion 22412, thereby improving the consistency of the drive components. Specifically, the preload provided by the elastic portion 22412 of the preload component 2241 is transmitted to the piezoelectric vibrator 22421 of the actuating component 2242, causing the friction head 22422 located on the piezoelectric vibrator 22421 to abut against the movable carrier 223. Due to the relatively small K value of the elastic portion 22412, it can deform to varying degrees due to tolerances, thereby minimizing differences in the preload of the actuating component 2242 under different tolerances.

[0071] It should be understood that according to the formula: K = F / X, where K is the stiffness (or elastic coefficient), F is the elastic force, and X is the displacement of the deformation. According to the above formula, reducing the K value of the elastic portion 22412 actually reduces the sensitivity of the elastic force to displacement. When the K value of the elastic portion 22412 is small, the fluctuation of the elastic force caused by the fluctuation of the displacement will become smaller. In other words, the fluctuation of the preload force applied by the elastic portion 22412 on the actuating component 2242 will be smaller, thereby making the friction force between the friction head 22422 and the movable carrier 223 more uniform and consistent.

[0072] Moreover, the elastic part 22412 can also make the actual motion state of the piezoelectric vibrator 22421 of the actuating component 2242 closer to the design value, reduce the impact of the external environment on the piezoelectric vibrator 22421, and prevent the vibration of the piezoelectric vibrator 22421 from being transmitted to the fixed base 222, causing the fixed base 222 to vibrate.

[0073] Furthermore, in some embodiments, the bent portion 22413 allows the fixed portion 22411 and the elastic portion 22412 to be located in different planes. In other words, the plane where the fixed portion 22411 is located is parallel to the plane where the elastic portion 22412 is located, and there is a certain distance between the plane where the fixed portion 22411 is located and the plane where the elastic portion 22412 is located. In this way, when the fixed portion 22411 is fixedly connected to the fixed base 222, the elastic portion 22412 can be arranged on the second end surface 22422b of the piezoelectric vibrator 22421 and provide pre-pressure to the piezoelectric vibrator 22421. Under the action of the pre-pressure, the friction head 22422 of the actuating component 2242 can abut against the movable carrier 223. Compared with the planar spring design in which the fixed portion 22411 and the elastic portion 22412 are located in the same plane, the existence of the bending portion 22413 can also reduce the K value of the elastic portion 22412, so that the fluctuation of the pre-pressure exerted by the elastic portion 22412 on the actuating component 2242 becomes smaller, thereby making the friction force between the friction head 22422 and the movable carrier 223 more uniform and consistent.

[0074] It should be understood that since the elastic part 22412 is connected to the first fixed part 22411a and the second fixed part 22411b, the number of the bending parts 22413 is also two, including: a first bending part 22413a and a second bending part 22413b, the first bending part 22413a connects the first fixed part 22411a and the elastic part 22412, and the second bending part 22413b connects the second fixed part 22411b and the elastic part 22412.

[0075] In some embodiments, referring to Figures 3A and 3B , the bent portion 22413 obliquely connects the fixed portion 22411 and the elastic portion 22412, with the plane of the bent portion 22413 intersecting the planes of the fixed portion 22411 and the elastic portion 22412. Specifically, the first bent portion 22413a and the second bent portion 22413b connect the first fixed portion 22411a, the elastic portion 22412, and the second fixed portion 22411b at opposite angles, such that the pre-compression component 2241 has an opening that gradually increases in size extending outward from the elastic portion 22412. In other words, the extension line of the first bent portion 22413a intersects the extension line of the second bent portion 22413b. In the pre-compression component 2241, with the plane of the side wall of the movable carrier 223 as a reference plane, the elastic portion 22412 protrudes beyond the fixed portion 22411. That is, the distance from the plane of the elastic portion 22412 to the movable carrier 223 is greater than the distance from the plane of the fixed portion 22411 to the movable carrier 223. This allows the elastic portion 22412 to press tightly against the second end surface 22422b of the piezoelectric vibrator 22421 when the fixed portion 22411 is fixedly connected to the fixed base 222, thereby generating a certain pre-compression force on the actuating component 2242. Furthermore, the K value of the elastic portion 22412 can be reduced, thereby reducing fluctuations in the pre-compression force exerted by the elastic portion 22412 on the actuating component 2242, thereby making the friction force between the friction head 22422 and the movable carrier 223 more uniform and consistent.

[0076] In some embodiments, the pre-pressing component 2241 can be a one-piece structure, that is, the fixed portion 22411 and the elastic portion 22412 are integrally formed, and the bent portion 22413 is stamped and formed at the connection between the fixed portion 22411 and the elastic portion 22412. This improves the consistency of the pre-pressing component 2241. Of course, in some embodiments, the pre-pressing component 2241 can also be a split structure, that is, the fixed portion 22411, the elastic portion 22412, and the bent portion 22413 are manufactured separately and then connected together by bonding or welding. This simplifies the manufacture of the pre-pressing component 2241.

[0077] In some embodiments, as shown in Figures 4A and 4B, the pre-stressing component 2241 includes a fixed portion 22411, an elastic portion 22412 and a beam portion 22414, wherein the fixed portion 22411 includes a first fixed portion 22411a and a second fixed portion 22411b, and the elastic portion 22412 includes a first elastic portion 22412a and a second elastic portion 22412b, and the first fixed portion 22411a and the first elastic portion 22412a are symmetrically arranged with respect to the beam portion 22414 and the second fixed portion 22411b and the second elastic portion 22412b. The crossbeam portion 22414 is disposed between the first elastic portion 22412a and the second elastic portion 22412b to connect the first elastic portion 22412a and the second elastic portion 22412b. The first fixing portion 22411a is connected to the first elastic portion 22412a. The second fixing portion 22411b is connected to the second elastic portion 22412b.

[0078] The first fixing portion 22411a and the second fixing portion 22411b are fixed to the fixing base 222. The first elastic portion 22412a and the second elastic portion 22412b extend in the second direction. In the third direction, at least a portion of the first elastic portion 22412a and at least a portion of the second elastic portion 22412b overlap with the second end surface 22422b of the piezoelectric vibrator 22421. The crossbeam portion 22414 is connected to the second end surface 22422b of the piezoelectric vibrator 22421. The area of ​​the crossbeam portion 22414 is no greater than the area of ​​the second end surface 22422b of the piezoelectric vibrator 22421. In the third direction, at least a portion of the second end surface 22422b of the piezoelectric vibrator 22421 overlaps with the crossbeam portion 22414.

[0079] Furthermore, in some embodiments, the fixed portion 22411 and the elastic portion 22412 are connected by a bent portion 22413, so that the fixed portion 22411 and the elastic portion 22412 are located in different planes. The elastic portion 22412 and the crossbeam portion 22414 are also connected by a bent portion 22413, so that the elastic portion 22412 and the crossbeam portion 22414 are located in different planes. In other words, the plane where the fixed portion 22411 and the plane where the elastic portion 22412 are located are parallel to each other and have different distances between them, and the plane where the elastic portion 22412 and the plane where the crossbeam portion 22414 are located are parallel to each other and have different distances between them. On the one hand, the structure of this pre-stressing component 2241 allows the elastic part 22412 and the beam part 22414 to be arranged on the second end face 22422b of the piezoelectric vibrator 22421 when the fixed part 22411 is fixedly connected to the fixed base 222, and provide pre-stress to the piezoelectric vibrator 22421. Under the action of the pre-stress, the friction head 22422 of the actuating component 2242 can abut against the movable carrier 223.

[0080] On the other hand, the crossbeam portion 22414 helps to further reduce the K value of the elastic portion 22412. As mentioned above, this helps to further reduce the fluctuation of the preload force exerted by the elastic portion 22412 on the actuating component 2242, thereby making the friction force between the friction head 22422 and the movable carrier 223 more uniform and consistent. This is because the crossbeam portion 22414 is provided with adhesive to fix the piezoelectric vibrator 22421 to the crossbeam portion 22414. This prevents the elastic portion 22412 from adhering to the piezoelectric vibrator 22421. That is, the elastic portion 22412 can be used to undergo elastic deformation to generate preload force on the actuating component 2242. The longer the length of the elastic portion 22412 along the second direction, the smaller the K value of the elastic portion 22412.

[0081] In some embodiments, the K value of the pre-stressing component 2241 can be reduced by increasing the number of bending portions 22413. For example, the bending portion 22413 includes a first bending portion 22413a, a second bending portion 22413b, a third bending portion 22413c and a fourth bending portion 22413d, wherein the first bending portion 22413a is connected to the first fixed portion 22411a and the first elastic portion 22412a, the second bending portion 22413b is connected to the first elastic portion 22412a and the beam portion 22414, the third bending portion 22413c is connected to the beam portion 22414 and the second elastic portion 22412b, and the fourth bending portion 22413d is connected to the second elastic portion 22412b and the second fixed portion 22411b. Referring to Figure 4A, the first bending portion 22413a and the second bending portion 22413b connect the first fixed portion 22411a, the first elastic portion 22412a and the beam portion 22414 in relative inclined directions to form an opening with gradually increasing size extending outward from the first elastic portion 22412a between the first fixed portion 22411a, the first elastic portion 22412a and the beam portion 22414; the third bending portion 22413c and the fourth bending portion 22413d connect the beam portion 22414, the second elastic portion 22412b and the second fixed portion 22411b in relative inclined directions to form an opening with gradually increasing size extending outward from the second elastic portion 22412b between the beam portion 22414, the second elastic portion 22412b and the second fixed portion 22411b.

[0082] Specifically, taking the plane where the side wall of the movable carrier 223 is located as the reference plane, the elastic part 22412 protrudes outward from the fixed part 22411, and the beam part 22414 is recessed into the elastic part 22412, that is, the distance from the elastic part 22412 to the movable carrier 223 is greater than the distance from the fixed part 22411 to the movable carrier 223, and the distance from the beam part 22414 to the movable carrier 223 is less than the distance from the elastic part 22412 to the movable carrier 223. In this way, when the fixed part 22411 is fixedly connected to the fixed base 222, the beam part 22414 can be tightly pressed against the second end face 22422b of the piezoelectric vibrator 22421 under the support of the elastic part 22412, so as to generate a certain pre-pressure on the actuating component 2242.

[0083] It should be understood that the deformation (or displacement of the deformation) of the pre-stressing component 2241 leads to the generation of pre-stress, and the elastic force and pre-stress are a pair of action and reaction forces. The actual deformation of the pre-stressing component 2241 is equal to the designed deformation plus the tolerance. Therefore, the actual pre-stress generated by the pre-stressing component 2241 is equal to the designed pre-stress plus the pre-stress caused by the tolerance. However, since the pre-stress caused by the tolerance is uncontrollable, it is necessary to make the pre-stress caused by the tolerance as small as possible. For example, as shown in Figure 4C, the multiple bends 22413 in this example can reduce the K value of the pre-stressing component 2241. Under the pre-stress of 300mN-600mN, the K value of the pre-stressing component 2241 is very low, and the tolerance fluctuation range has little effect on the pre-stress, which is conducive to reducing the fluctuation of the pre-stress of the elastic part 22412 on the actuating component 2242, thereby making the friction between the friction head 22422 and the movable carrier 223 more uniform and consistent.

[0084] Furthermore, in some embodiments, the pre-stressing component 2241 may also include a clamping arm 22415, which includes a first clamping arm 22415a and a second clamping arm 22415b, extending from the beam portion 22414 in a direction perpendicular to the optical axis to clamp the actuating component 2242 in the pre-stressing component 2241.

[0085] The clamping arms 22415 extend from both ends of the beam portion 22414 along the third direction, wherein the clamping arms 22415 are staggered with the elastic portion 22412. That is, the first elastic portion 22412a and the second elastic portion 22412b are respectively disposed at both ends of the beam portion 22414 along the second direction, and the first clamping arms 22415a and the second clamping arms 22415b are respectively disposed at both ends of the beam portion 22414 along the first direction.

[0086] The first clamping arm 22415a and the second clamping arm 22415b can clamp the piezoelectric vibrator 22421 within the pre-stressing component 2241 at two opposing side surfaces 22423c of the piezoelectric vibrator 22421 to maintain the stability of the piezoelectric vibrator 22421. However, since the movement mechanism of the piezoelectric vibrator 22421 is actually to achieve the movement of the friction head 22422 through its own bending vibration, if the clamping arm 22415 extends too far along the third direction, the clamping arm 22415 will be located too far on the side surface 22423c of the piezoelectric vibrator 22421 or the piezoelectric vibrator 22421 is clamped too tightly, which will suppress the vibration of the piezoelectric vibrator 22421, thereby reducing the motion output and possibly shortening the service life of the actuating component 2242. Therefore, in the present application, the size of the clamping arm 22415 on the side surface 22423c of the piezoelectric vibrator 22421 is minimized to avoid the above-mentioned situation.

[0087] In some embodiments, the movable carrier 223 includes a friction plate 2235, which is disposed on a sidewall of the movable carrier 223 and faces the side where the friction head 22422 is located. The friction plate 2235 is integrally formed on the sidewall of the movable carrier 223. Of course, the friction plate 2235 and the movable carrier 223 may also be separate components, that is, the friction plate 2235 and the movable carrier 223 are independent components attached to the sidewall of the movable carrier 223 via an adhesive.

[0088] The friction plate 2235 is disposed on the side of the movable carrier 223 facing the friction head 22422. Specifically, the friction plate 2235 is clamped between the movable carrier 223 and the actuating component 2242. The pre-compression component 2241 acts to frictionally couple the actuating component 2242 to the friction plate 2235. It should be understood that the friction plate 2235 functions to increase the friction between the movable carrier 223 and the friction head 22422 of the actuating component 2242. The friction plate 2235 can be made of a metal oxide material such as aluminum oxide or aluminum oxide.

[0089] In some embodiments, as shown in Figures 5A to 7, in order to improve the stability of the telephoto camera module 1 during optical focus and / or optical zoom and improve the imaging quality, a guide assembly 225 is provided between the fixed base 222 and the movable carrier 223 to provide support and guidance for the movable carrier 223 to move smoothly along the optical axis within the fixed base 222. The guide assembly 225 can be implemented as a ball or a guide rod. When the guide assembly 225 is implemented as a ball, a plurality of balls are arranged along the optical axis, and the plurality of balls can be movably clamped between the movable carrier 223 and the fixed base 222 to support and guide the movable carrier 223 to move along the optical axis; when the guide assembly 225 is implemented as a guide rod, the guide rod extends along the optical axis, and both ends of the guide rod are fixed to the fixed base 222. The movable carrier 223 is supported and guided by the guide rod to move along the optical axis.

[0090] Specifically, the guide assembly 225 includes a first guide member 2251 and a second guide member 2252, with the actuating component 2242 disposed between the first guide member 2251 and the second guide member 2252. In a specific example of the present application, the friction head 22422 of the actuating component 2242 is located at the center of the line connecting the first guide member 2251 and the second guide member 2252. When the preload component 2241 applies preload force, causing the friction head 22422 to abut against the movable carrier 223, the first guide member 2251 and the second guide member 2252 provide a supporting force for the movable carrier 223, with the preload force and the supporting force being parallel to each other and in opposite directions. When the position at which the friction head 22422 acts on the movable carrier 223 is located at the center of the line connecting the positions at which the first guide member 2251 and the second member act on the movable carrier 223, the movable carrier 223 is subjected to forces symmetrically relative to the position at which the friction head 22422 acts, thereby helping to maintain the balance of the movable carrier 223.

[0091] Furthermore, the friction head 22422 of the actuating member 2242 abuts against one side of the movable carrier 223, and the guide assembly 225 can be disposed on the same side as the actuating member 2242, as shown in FIG5A ; the guide assembly 225 can also be disposed on the opposite side of the actuating member 2242, as shown in FIG5B . In other words, the guide assembly 225 and the actuating member 2242 can be located on the same side of the movable carrier 223, or on opposite sides of the movable carrier 223.

[0092] In some embodiments, the sidewall of the movable carrier 223 has a first guide groove 2234 extending along the second direction, and the sidewall of the fixed base 222 has a second guide groove 2224 extending along the second direction. The first guide groove 2234 and the second guide groove 2224 are arranged opposite each other along the third direction. There are two first guide grooves 2234, which are arranged opposite each other along the first direction, and there are two second guide grooves 2224, which are arranged opposite each other along the first direction. A first guide member 2251 is clamped between one first guide groove 2234 and one second guide groove 2224, and a second guide member 2252 is clamped between another first guide groove 2234 and another second guide groove 2224. The guide assembly 225 can prevent direct contact between the movable carrier 223 and the fixed base 222, thereby reducing friction during movement of the movable carrier 223. Furthermore, the movement trajectory of the guide assembly 225 is limited within the first guide groove 2234 and the second guide groove 2224 , thereby providing guidance for the movement of the movable carrier 223 .

[0093] It should be understood that because the piezoelectric vibrator 22421 causes the friction head 22422 to move through vibration and deformation, the angle at which the friction head 22422 abuts against the movable carrier 223 changes as the piezoelectric vibrator 22421 vibrates and deforms. This results in the friction force generated between the friction head 22422 and the movable carrier 223 not always being parallel to the optical axis. Instead, the direction of the friction force is somewhat tilted relative to the plane of the sidewall of the movable carrier 223. This tilted friction force can cause the movable carrier 223 to tilt. In other words, under certain circumstances, when the actuating component 2242 drives the movable carrier 223 to move, the tilted friction force can cause the movable carrier 223 to tilt.

[0094] Furthermore, the preload component 2241 applies a preload to the actuating component 2242. The direction of the preload is perpendicular to the plane of the sidewalls of the movable carrier 223 along the third direction. However, due to the vibration and deformation of the piezoelectric vibrator 22421, the angle at which the friction head 22422 abuts the movable carrier 223 changes accordingly. As a result, the direction of the preload is not always perpendicular to the plane of the sidewalls of the movable carrier 223, but rather has a certain inclination relative to the plane of the sidewalls of the movable carrier 223. Furthermore, due to the relatively small K value of the preload component 2241, the elastic portion 22412 may bend to a certain extent due to the deformation of the piezoelectric vibrator 22421, causing the angle of the preload direction relative to the abutment surface to change. In other words, under certain circumstances, the direction of the preload is inclined relative to the plane of the sidewalls of the movable carrier 223. In such circumstances, when the actuating component 2242 drives the movable carrier 223 to move, the movable carrier 223 may be easily tilted.

[0095] Furthermore, when the guide assembly 225 is implemented as a ball bearing, the ball bearings are in point contact with both the fixed base 222 and the movable carrier 223 on both sides. Once the movable carrier 223 tilts, at least one of the ball bearings of the guide assembly 225 will not be able to simultaneously contact the fixed base 222 and the movable carrier 223, which may cause the movable carrier 223 to become stuck with the ball bearings, or the movable carrier 223 to become detached from the ball bearings, making it impossible for the movable carrier 223 to continue to move. Of course, when the guide assembly 225 is implemented as a guide rod, the situation will be better than that of the ball bearings, but the tilt of the movable carrier 223 will also affect the imaging effect of the telephoto camera module 1.

[0096] Furthermore, the risk of the ball getting stuck exists when the movable carrier 223 is tilted relative to the fixed base 222. Furthermore, when sliding friction occurs between the ball, the fixed base 222, and the movable carrier 223, the ball may be in either a rolling or sliding state. This creates uncertainty in the ball's motion state and allows the ball to switch between different motion states at will, increasing the risk of getting stuck. Furthermore, the ball may fall off, or rub or collide with the movable carrier 223 and the fixed base 222, generating debris that could cause the ball to get stuck.

[0097] To avoid the above situation, in some embodiments, the lens driving device 22 further includes an auxiliary positioning assembly 226, which is disposed between the fixed base 222 and the movable carrier 223. When the movable carrier 223 is driven to move along the optical axis, the auxiliary positioning assembly 226 does not contact at least one of the fixed base 222 and the movable carrier 223. When the movable carrier 223 tilts, the auxiliary positioning assembly 226 contacts both the fixed base 222 and the movable carrier 223 to support and straighten the movable carrier 223. It should be understood that, in this application, when the optical axis of the optical lens 21 carried by the movable carrier 223 is not parallel to the axis extending along the length direction of the fixed base 222, it can be considered that the movable carrier 223 is tilted.

[0098] Specifically, as shown in Figures 6A to 7, the auxiliary positioning assembly 226 is disposed between the movable carrier 223 and the fixed base 222. Specifically, the auxiliary positioning assembly 226 is disposed between the side wall of the movable carrier 223 and the side wall of the fixed base 222. A gap is provided between the side wall of the movable carrier 223 and the side wall of the fixed base 222. The size of the gap is larger than the size of the auxiliary positioning assembly 226. The existence of this gap provides a certain margin for adjustment of the movable carrier 223. It should be noted that the gap here refers to the gap between a portion of the side wall of the movable carrier 223 at the same height as the auxiliary positioning assembly 226 and a portion of the side wall of the fixed base 222 along the third direction. For example, the gap between the outer side surface 22322b of the carrier extension arm 22322 and the corresponding portion of the side wall of the fixed base 222 will be described below. When the movable carrier 223 is driven by the actuating member 2242, the guide assembly 225 always provides support for the movable carrier 223 to ensure the parallelism of the movable carrier 223. In the event that the movable carrier 223 tilts, the gap can provide a certain margin for adjusting the position of the movable carrier 223. In other words, when the movable carrier 223 tilts, the auxiliary positioning assembly 226 abuts against the opposing surfaces of the fixed base 222 and the movable carrier 223, thereby straightening the movable carrier 223 and preventing the movable carrier 223 from tilting, thereby preventing the movable carrier 223 from being affected in its movement.

[0099] It should be understood that the preload of the preload component 2241 acts on the actuating component 2242, causing the friction head 22422 of the actuating component 2242 to abut against the sidewall of the movable carrier 223, causing the movable carrier 223 to deflect toward the side away from the actuating component 2242. This allows the auxiliary positioning assembly 226 to be disposed within the gap between the sidewall of the movable carrier 223 and the sidewall of the fixed base 222, thereby preventing the auxiliary positioning assembly 226 from contacting at least one of the fixed base 222 or the movable carrier 223. It should be understood that the auxiliary positioning assembly 226 can be implemented as a ball, a slider, or a reed. In this application, the auxiliary positioning assembly 226 is implemented as a ball as an example, and the size of the gap is greater than the diameter of the ball.

[0100] It should be understood that when the auxiliary positioning assembly 226 is provided on the slider or the reed, the auxiliary positioning assembly 226 can be fixed to the movable carrier 223, the auxiliary positioning carrier is provided in the gap between the side wall of the movable carrier 223 and the side wall of the fixed base 222, and the auxiliary positioning assembly 226 does not contact the side wall of the fixed base 222. Of course, the auxiliary positioning assembly 226 can be fixed to the fixed base 222, the auxiliary positioning carrier is provided in the gap between the side wall of the movable carrier 223 and the side wall of the fixed base 222, and the auxiliary positioning assembly 226 does not contact the side wall of the movable carrier 223.

[0101] In some embodiments, the auxiliary positioning assembly 226 is disposed on the same side as the guide assembly 225, that is, the auxiliary positioning assembly 226 and the guide assembly 225 are located on the same side of the movable carrier 223. To avoid interference between the auxiliary positioning assembly 226 and the guide assembly 225, a movable carrier 223 with a new structure is provided in the present application. Referring to Figures 5A, 6A, 6B, and 7, the movable carrier 223 includes a carrier body 2231 and a first carrier sidewall 2232 and a second carrier sidewall 2233 extending from the carrier body 2231. The carrier body 2231 has a receiving cavity for fixing the optical lens 21. The first carrier sidewall 2232 and the second carrier sidewall 2233 are disposed opposite each other along a third direction. The first carrier sidewall 2232 is located on a side close to the actuating component 2242, and the second carrier sidewall 2233 is located on a side away from the actuating component 2242. The first carrier sidewall 2232 includes a carrier connection portion 22321 and a carrier extension arm 22322. The carrier connection portion 22321 is used to connect the carrier extension arm 22322 to the carrier body 2231. The carrier extension arm 22322 extends from the carrier connection portion 22321 along a first direction and is spaced apart from the carrier body 2231. It should be understood that the first carrier sidewall 2232 and the second carrier sidewall 2233 in this application can be understood as the sidewalls of the aforementioned movable carrier 223.

[0102] The carrier extension arm 22322 includes an inner side surface 22322a facing the optical lens 21 and an outer side surface 22322b opposite the inner side surface 22322a. The outer side surface 22322b of the carrier extension arm 22322 has a positioning groove 2232a, and the auxiliary positioning assembly 226 is positioned within the positioning groove 2232a. The inner side surface 22322a of the carrier extension arm 22322 has a first guide groove 2234, and the guide assembly 225 is positioned within the first guide groove 2234. In other words, the auxiliary positioning assembly 226 and the guide assembly 225 are located on opposite sides of the carrier extension arm 22322 along the third direction. In this way, the guide assembly 225 can support and guide the movable carrier 223. When the movable carrier 223 tilts, the auxiliary positioning assembly 226 can support the movable carrier 223 to straighten it.

[0103] Furthermore, the carrier connection portion 22321 has an inwardly recessed groove, and the friction plate 2235 is disposed in the groove so that the friction head 22422 of the actuating component 2242 can abut against the friction plate 2235 .

[0104] It should be understood that, in conjunction with the movable carrier 223, the fixed base 222 includes a base body 2221, a base front plate 2222, and a base rear plate 2223. The base body 2221 includes a base top plate 22211, a base bottom plate 22212, and a base sidewall 22213. The base top plate 22211, the base bottom plate 22212, and the base sidewall 22213 form a cavity for accommodating components such as the movable carrier 223, the guide assembly 225, and the auxiliary positioning assembly 226. It should be understood that the base sidewall 22213 in this application can be understood as the sidewall of the fixed base 222 mentioned above.

[0105] The base top plate 22211 and the base bottom plate 22212 are arranged opposite each other along a first direction. The base sidewall 22213 is arranged between the base top plate 22211 and the base bottom plate 22212 and connects the base top plate 22211 and the base bottom plate 22212. The base front plate 2222 is connected to the base body 2221 near the light inlet of the base body 2221, and the base rear plate 2223 is connected to the base body 2221 near the light outlet of the base body 2221. The base front plate 2222, the base rear plate 2223, and the base body 2221 can be an integrated structure or a separate structure.

[0106] Due to the presence of the base top plate 22211 and base bottom plate 22212 of the base body 2221, the movable carrier 223 cannot be installed in the cavity of the fixed base 222 along the first direction. Therefore, in some embodiments, the base rear plate 2223 and the base body 2221 are configured as separate structures, so that the movable carrier 223 can be installed in the cavity of the base body 2221 along the second direction. Of course, the base front plate 2222 and the base body 2221 can also be configured as separate structures, thereby allowing the movable carrier 223 to be installed in the cavity of the fixed base 222 along the first direction.

[0107] Furthermore, the base top plate 22211 and the base bottom plate 22212 extend along the first direction to form a base extension arm 22221, and the base extension arm 22221 is located between the carrier extension arm 22322 and the carrier body 2231. The base extension arm 22221 is provided with a second guide groove 2224, and the opening of the second guide groove 2224 faces the inner side surface 22322a of the carrier extension arm 22322, so that the second guide groove 2224 is arranged opposite to the first guide groove 2234, thereby allowing the guide assembly 225 to be clamped between the first guide groove 2234 and the second guide groove 2224.

[0108] In some embodiments, the base side wall 22213 has an opening, which connects the outer surface and the inner surface of the base side wall 22213, wherein the pre-pressing component 2241 is fixed to the outer surface of the base side wall 22213, and the actuating component 2242 is arranged in the opening of the base side wall 22213, and extends into the cavity of the fixed base 222 through the opening of the base side wall 22213, so that the friction head 22422 of the actuating component 2242 abuts against the carrier side wall of the movable carrier 223.

[0109] Of course, in some embodiments, the auxiliary positioning assembly 226 and the guide assembly 225 are disposed on opposite sides, that is, the auxiliary positioning assembly 226 and the guide assembly 225 are located on opposite sides of the movable carrier 223. In this example, the second carrier sidewall 2233 has a first guide groove 2234, and the guide assembly 225 is disposed in the first guide groove 2234. The first carrier sidewall 2232 has a positioning groove 2232a, and the auxiliary positioning assembly 226 is disposed in the positioning groove 2232a.

[0110] In some embodiments, the plane on which the auxiliary positioning assembly 226 is located is parallel to the abutment surface of the movable carrier 223. This allows the auxiliary positioning assembly 226 to be disposed within the gap between the base sidewall 22213 of the fixed base 222 and the carrier sidewall of the movable carrier 223 when the movable carrier 223 translates along the optical axis, so that the auxiliary positioning assembly 226 does not contact at least one of the fixed base 222 or the movable carrier 223. However, when the movable carrier 223 tilts, the auxiliary positioning assembly 226 can abut against the fixed base 222 and the movable carrier 223, thereby straightening the movable carrier 223 and preventing it from tilting.

[0111] In some embodiments, the auxiliary positioning assembly 226 includes at least two positioning members, and the at least two positioning members are dispersedly disposed around the abutting surface.

[0112] In some embodiments, along a direction perpendicular to the optical axis, such as the third direction, the auxiliary positioning assembly 226 does not overlap with the actuating component 2242 .

[0113] In some embodiments, the auxiliary positioning assembly 226 is disposed on a side of the movable carrier 223 facing the actuating member 2242, i.e., the auxiliary positioning assembly 226 and the actuating member 2242 are located on the same side of the movable carrier 223. In other embodiments, the auxiliary positioning assembly 226 is disposed on a side of the movable carrier 223 away from the actuating member 2242, i.e., the auxiliary positioning assembly 226 and the actuating member 2242 are located on opposite sides of the movable carrier 223.

[0114] In some embodiments, the auxiliary positioning assembly 226 includes a first positioning member 2261, a second positioning member 2262, a third positioning member 2263, and a fourth positioning member 2264. The first positioning member 2261, the second positioning member 2262, the third positioning member 2263, and the fourth positioning member 2264 are dispersedly disposed above and below the actuating member 2242 and are dispersed along a first direction. For example, the first positioning member 2261 and the second positioning member 2262 are located above the actuating member 2242, and the third positioning member 2263 and the fourth positioning member 2264 are located below the actuating member 2242. In this way, when the movable carrier 223 tilts, the auxiliary positioning assembly 226 can support the movable carrier 223 from multiple positions.

[0115] It should be understood that the more dispersed the first positioning member 2261, the second positioning member 2262, the third positioning member 2263, and the fourth positioning member 2264 are on the movable carrier 223, the better the effect of limiting the tilt of the movable carrier 223. In other words, when the movable carrier 223 tilts slightly, the multiple dispersed positioning members can all contact the movable carrier 223 to straighten the movable carrier 223. In a specific example of the present application, the distance between two positioning members arranged along the first direction ranges from 1.5 mm to 2.9 mm, and the distance between two positioning members arranged along the second direction ranges from 2.8 mm to 3 mm.

[0116] In some embodiments, as shown in Figures 6A and 6B, the conductive assembly 227 includes a first conductive substrate 2271 and a second conductive substrate 2272, wherein the first conductive substrate 2271 is located between the second end surface 22422b of the piezoelectric vibrator 22421 and the pre-pressing component 2241 to achieve electrical connection between the external electronic device and the actuating component 2242. Specifically, when there are two actuating components 2242, there are also two corresponding pre-pressing components 2241. The first conductive substrate 2271 includes two conductive portions 22711 extending between the second end surfaces 22422b of the two piezoelectric vibrators 22421 and the two pre-pressing components 2241, and an extension portion 22712 connected to the two conductive portions 22711. The extension portion 22712 can be electrically connected to the external electronic device.

[0117] The second conductive substrate 2272 is arranged opposite to the first conductive substrate 2271 along the third direction, that is, the second conductive substrate 2272 and the first conductive substrate 2271 are located on opposite sides of the movable carrier 223. In order to achieve drive control of the actuating component 2242, in some embodiments, the carrier side wall of the movable carrier 223 is provided with a position sensing magnet 228, and the second conductive substrate 2272 is provided with a position sensing element 229. The position sensing magnet 228 and the position sensing element 229 are arranged opposite each other. Based on the strength of the magnetic field of the position sensing magnet 228 sensed by the position sensing element 229, the position of the movable carrier 223 can be determined, and the actuating component 2242 can be controlled to move the movable carrier 223 to the desired position. In the present application, the position sensing element 229 can be implemented as a Hall element, a driver IC, or a TMR.

[0118] Furthermore, in some embodiments, the lens driving device 22 further includes a housing 221 , which is fixedly connected to the fixed base 222 to form a space that can accommodate components such as the movable carrier 223 , the actuating component 2242 , and the guide assembly 225 .

[0119] As shown in FIG8 and FIG9 , in some embodiments, a new rolling assembly 230 is provided instead of the guide assembly 225 in the above embodiment to avoid the situation where the ball is stuck due to the tilt of the movable carrier 223 .

[0120] In some embodiments, the rolling assembly 230 includes at least one circulating track 231 and a plurality of circulating balls 232. The circulating track 231 is formed between the fixed base 222 and the movable carrier 223, and the circulating balls 232 are rollably disposed within the circulating track 231. The pre-pressing component 2241 provides pre-pressure to the actuating component 2242, causing the friction head 22422 of the actuating component 2242 to abut against the movable carrier 223. This allows the circulating balls 232 on one side of the circulating track 231 to roll between the movable carrier 223 and the fixed base 222. When the movable carrier 223 moves relative to the fixed base 222, it drives the circulating balls 232 to roll within the circulating track 231. The circulating rolling of the circulating balls 232 ensures that the circulating balls 232 remain in a rolling state throughout the driving process without becoming stuck.

[0121] In some embodiments, the rolling assembly 230 and the actuating member 2242 are disposed on the same side; in some embodiments, the rolling assembly 230 and the actuating member 2242 are disposed on opposite sides. That is, the rolling assembly 230 and the actuating member 2242 can be disposed on one side of the movable carrier 223 or on opposite sides of the movable carrier 223.

[0122] In some embodiments, the circulation track 231 is provided with a support side 2311 and a free side 2312. The support side 2311 is located on the side of the circulation track 231 away from the actuating component 2242, and the free side 2312 is located on the side of the circulation track 231 close to the actuating component 2242. The pre-pressure direction provided by the pre-pressure component 2241 is perpendicular to the driving direction of the actuating component 2242, so that the circulation ball 232 located on the support side 2311 can be rolled and clamped between the movable carrier 223 and the fixed base 222, so that the circulation ball 232 located on the free side 2312 can be freely moved between the movable carrier 223 and the fixed base 222. Specifically, the preload of the preload component 2241 pushes the actuating component 2242, causing the friction head 22422 of the actuating component 2242 to abut against the sidewall of the movable carrier 223. The movable carrier 223 deflects away from the actuating component 2242, thereby reducing the distance between the movable carrier 223 and the fixed base 222 on the support side 2311, thereby clamping the recirculating balls 232 on the support side 2311. The distance between the movable carrier 223 and the fixed base 222 on the free side 2312 increases, allowing the recirculating balls 232 on the free side 2312 to move freely. In other words, the width of the support side 2311 is smaller than the width of the free side 2312.

[0123] The circulation track 231 is further provided with a pair of connecting grooves (not shown), which are arranged along the third direction of the circulation track 231, respectively connecting the support side 2311 and the free side 2312. When the actuating component 2242 drives the movable carrier 223 to move relative to the fixed base 222, the circulating balls 232 located on the support side 2311 roll relative to the movable carrier 223 in a direction opposite to the moving direction of the movable carrier 223, pass through the connecting groove and enter the free side 2312, thereby pushing the circulating balls 232 located on the free side 2312 to pass through the connecting groove and enter the support side 2311, so that the circulating balls 232 circulate and roll in the circulation track 231.

[0124] The circulating track 231 includes an outer ball track 2313 and an inner ball track 2314 . The outer ball track 2313 forms a free side 2312 of the circulating track 231 , and the inner ball track 2314 forms a supporting side 2311 of the circulating track 231 .

[0125] It is understood that in some embodiments, at least two circulating balls 232 are located on the supporting side 2311 to form multiple contact points between the movable carrier 223 and the fixed base 222, thereby stably supporting the movable carrier 223 on the fixed base 222 and reducing the tilting amplitude of the movable carrier 223 relative to the fixed base 222. At least two circulating balls 232 are located on the free side 2312. When the movable carrier 223 tilts relative to the fixed base 222, some or all of the circulating balls 232 located on the free side 2312 are clamped between the movable carrier 223 and the fixed base 222, forming contact points between the movable carrier 223 and the fixed base 222 to straighten the movable carrier 223, reduce the tilting amplitude of the movable carrier 223, and reduce the risk of tilting of the movable carrier 223, thereby avoiding the phenomenon of jamming between the movable carrier 223 and the balls, especially during long-stroke driving.

[0126] In some embodiments, a plurality of circulating balls 232 are arranged in an annular pattern within the circulating track 231. The reserved gaps between the circulating balls 232 are smaller than the diameter of the smallest circulating ball 232. This reduces the free range of movement between the circulating balls 232, thereby preventing the circulating balls 232 from moving within the circulating track 231 and improving the reliability and stability of the lens driving device 22. In other words, the reserved gaps between the circulating balls 232 are smaller than the diameter of any individual circulating ball 232.

[0127] In some embodiments, the circulating balls 232 are of different sizes. For example, the circulating balls 232 come in two sizes, large and small, and are arranged in intervals within the circulating track 231. The large-sized circulating balls 232 fit within the circulating track 231 and are clamped between the movable carrier 223 and the fixed base 222. The small-sized circulating balls 232 form support between the large-sized circulating balls 232, so that the circulating balls 232 are annularly filled within the circulating track 231. It is understood that the reserved gaps between the circulating balls 232 are smaller than the diameters of the small-sized circulating balls 232. Of course, in some embodiments, the circulating balls 232 are of the same size so that they fit within the circulating track 231, thereby reducing the number of parts and reducing the difficulty of installation. It is understood that the reserved gaps between the circulating balls 232 are smaller than the diameters of the circulating balls 232.

[0128] In some embodiments, the circulating balls 232 may be made of plastic, metal, or ceramic. For example, if the circulating balls 232 are made of ceramic, they are more wear-resistant, which helps extend the service life of the circulating balls 232. The smooth surface of the circulating balls 232 made of ceramic prevents adhesion between the circulating balls 232. The contact force and friction between the circulating balls 232 are relatively small, which reduces the driving force required to drive the movable carrier 223 relative to the fixed base 222.

[0129] In some embodiments, the circulating track 231 is coated with grease to reduce the friction coefficient between the circulating balls 232 and between the circulating balls 232 and the wall of the circulating track 231, so that the movable carrier 223 can be driven to move relative to the fixed base 222 with a smaller driving force, and the grease can reduce the wear of the circulating balls 232, the wall of the inner ball track 2314 and the wall of the outer ball track 2313, thereby extending the service life of the rolling assembly 230. It is worth mentioning that the circulating balls 232 on the free side 2312 are not clamped by the movable carrier 223 and the fixed base 222. When the lens driving device 22 shakes, collisions will occur between the circulating balls 232 on the free side 2312, between the circulating balls 232 and the movable carrier 223, and between the circulating balls 232 and the fixed base 222. The grease can stick to the circulating balls 232 on the free side 2312 to prevent the circulating balls 232 from freely moving in the free side 2312 and causing collision wear, thereby extending the service life of the circulating balls 232 and avoiding the lens driving device 22 from making abnormal noises due to collisions of the circulating balls 232.

[0130] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A lens driving device, characterized in that: include: Fixed base; A movable carrier, used for carrying an optical lens, wherein the optical lens defines an optical axis, and the movable carrier is movably disposed in the fixed base; a driving assembly connected to the fixed base and abutting against the movable carrier to apply a pre-pressure to the movable carrier and adapted to drive the movable carrier to move relative to the fixed base upon receiving a driving signal; a guide assembly, the guide assembly being clamped between the fixed base and the movable carrier and maintaining contact with opposing surfaces of the fixed base and the movable carrier; The auxiliary positioning component is arranged between the fixed base and the movable carrier. When the movable carrier is driven to move along the optical axis, the auxiliary positioning component does not contact at least one of the fixed base and the movable carrier.

2. The lens driving device according to claim 1, wherein: When the movable carrier is tilted, the auxiliary positioning assembly abuts against the opposite surfaces of the fixed base and the movable carrier.

3. The lens driving device according to claim 2, wherein: There is a gap between the side wall of the movable carrier and the side wall of the fixed base. The size of the gap is larger than the size of the auxiliary positioning component, so as to provide a certain margin for the adjustment of the movable carrier.

4. The lens driving device according to claim 3, wherein: The movable carrier has an abutting surface facing the driving assembly, the driving assembly abuts against the abutting surface of the movable carrier, and the plane where the auxiliary positioning assembly is located is parallel to the abutting surface.

5. The lens driving device according to claim 4, wherein: The auxiliary positioning assembly includes at least two positioning members, and the at least two positioning members are dispersedly arranged around the abutting surface.

6. The lens driving device according to claim 4, wherein: The driving assembly includes a pre-pressing component and an actuating component, wherein the pre-pressing component is connected to the fixed base, and the actuating component is connected to the pre-pressing component, and the pre-pressing component provides pre-pressure for the actuating component so that the actuating component abuts against the abutting surface of the movable carrier.

7. The lens driving device according to claim 6, wherein: Along a direction perpendicular to the optical axis, the actuating component and the auxiliary positioning assembly do not overlap.

8. The lens driving device according to claim 7, wherein: The auxiliary positioning assembly includes a first positioning member, a second positioning member, a third positioning member and a fourth positioning member, wherein the first positioning member, the second positioning member, the third positioning member and the fourth positioning member are dispersedly arranged on the upper and lower sides of the actuating member, and are dispersedly arranged along the first direction, and the first direction is perpendicular to the optical axis direction.

9. The lens driving device according to claim 8, wherein: The distance between the two positioning members arranged along the first direction ranges from 1.5 mm to 2.9 mm, and the distance between the two positioning members arranged along the second direction ranges from 2.8 mm to 3 mm. The second direction is the optical axis direction.

10. The lens driving device according to claim 9, wherein: The auxiliary positioning assembly and the guide assembly are located on the same side of the movable carrier, the movable carrier includes a carrier body and a first carrier side wall extending from the carrier body, the first carrier side wall is located on the side close to the actuating component, the first carrier side wall includes a carrier extension arm, the carrier extension arm extends along the first direction and is spaced apart from the carrier body, the carrier extension arm includes an inner side surface facing the optical lens and an outer side surface opposite to the inner side surface, the outer side surface of the carrier extension arm has a positioning groove, the auxiliary positioning assembly is placed in the positioning groove, the inner side surface of the carrier extension arm has a first guide groove, and the guide assembly is placed in the first guide groove.

11. The lens driving device according to claim 9, wherein: The guide assembly and the auxiliary positioning assembly are arranged on opposite sides of the movable carrier, and the movable carrier includes a carrier body, a first carrier side wall and a second carrier side wall, the first carrier side wall and the second carrier side wall both extend from the carrier body, and the carrier body has a accommodating cavity to fix the optical lens, the first carrier side wall is located on the side close to the actuating component, and the second carrier side wall is located on the side away from the actuating component, the second carrier side wall has a first guide groove, the guide assembly is placed in the first guide groove, the first carrier side wall has a positioning groove, and the auxiliary positioning assembly is placed in the positioning groove.

12. A telephoto camera module, characterized in that: include: A light deflection module, located at the front end of the telephoto camera module, to reflect incident light from an object and change the propagation direction of the light; A lens module, comprising the lens driving device and the optical lens according to any one of claims 1 to 11; and Photosensitive module: the light emitted from the light deflection module passes through the lens module and reaches the photosensitive module, and the photosensitive module forms an image.

13. A lens driving device, characterized in that: include: Fixed base; A movable carrier, used for carrying an optical lens, wherein the lens defines an optical axis, and the movable carrier is movably disposed in the fixed base; a driving assembly adapted to drive the movable carrier to move relative to the fixed base along the optical axis upon receiving a driving signal; the driving assembly comprising an actuating component and a pre-pressing component, the pre-pressing component being connected to the fixed base, the actuating component being connected to the pre-pressing component, the pre-pressing component providing a pre-pressure to the actuating component so that the actuating component abuts against the movable carrier; The pre-stressing component includes a fixed portion, an elastic portion, and a bent portion connecting the fixed portion and the elastic portion. The plane where the fixed portion is located and the plane where the elastic portion is located are parallel to each other and have a certain distance between them. The plane where the bent portion is located intersects with the plane where the fixed portion is located and the plane where the elastic portion is located, respectively.

14. The lens driving device according to claim 13, wherein: The distance between the plane where the elastic portion is located and the movable carrier is greater than the distance between the plane where the fixing portion is located and the movable carrier.

15. The lens driving device according to claim 14, wherein: The elastic portion extends along the optical axis direction, the fixing portion includes a first fixing portion and a second fixing portion, the bending portion includes a first bending portion and a second bending portion, the first bending portion connects the first fixing portion and the elastic portion, and the second bending portion connects the second fixing portion and the elastic portion.

16. The lens driving device according to claim 15, wherein: The first bent portion and the second bent portion connect the first fixing portion, the elastic portion, and the second fixing portion in opposite oblique directions, so that the pre-pressing component has an opening extending outward from the elastic portion and gradually increasing in size.

17. The lens driving device according to claim 16, wherein: The actuating component includes a piezoelectric vibrator and a friction head. The piezoelectric vibrator includes a first end face for setting the friction head and a second end face opposite to the first end face. The elastic part is connected to the second end face to provide a pre-pressure for the friction head to abut against the movable carrier.

18. The lens driving device according to claim 17, wherein: At least a portion of the elastic portion overlaps with the second end surface of the piezoelectric vibrator in a direction perpendicular to the optical axis.

19. The lens driving device according to claim 18, wherein: The elastic part includes an adhesive part and a deformation part. Along the direction perpendicular to the optical axis, the adhesive part overlaps with the second end face to fix the piezoelectric vibrator to the elastic part, and the deformation part does not overlap with the second end face to generate pre-pressure on the actuating component through elastic deformation.

20. The lens driving device according to claim 14, wherein: The pre-pressing component further includes a crossbeam portion, and a plane where the crossbeam portion is located is parallel to a plane where the elastic portion is located and has a certain distance therebetween.

21. The lens driving device according to claim 20, wherein: The distance between the plane where the cross beam portion is located and the movable carrier is smaller than the distance between the plane where the elastic portion is located and the movable carrier.

22. The lens driving device according to claim 21, wherein: The fixed portion includes a first fixed portion and a second fixed portion, the elastic portion includes a first elastic portion and a second elastic portion, and the bent portion includes a first bent portion, a second bent portion, a third bent portion and a fourth bent portion, wherein the first bent portion is connected to the first fixed portion and the first elastic portion, the second bent portion is connected to the first elastic portion and the beam portion, the third bent portion is connected to the beam portion and the second elastic portion, and the fourth bent portion is connected to the second elastic portion and the second fixed portion.

23. The lens driving device according to claim 22, wherein: The first bent portion and the second bent portion connect the first fixed portion, the first elastic portion and the beam portion in relative inclined directions to form an opening with a gradually increasing size extending outward from the first elastic portion between the first fixed portion, the first elastic portion and the beam portion; the third bent portion and the fourth bent portion connect the beam portion, the second elastic portion and the second fixed portion in relative inclined directions to form an opening with a gradually increasing size extending outward from the second elastic portion between the beam portion, the second elastic portion and the second fixed portion.

24. The lens driving device according to claim 23, wherein: The pre-pressing component further includes a clamping arm, which includes a first clamping arm and a second clamping arm. The clamping arm extends from the beam portion in a direction perpendicular to the optical axis to clamp the actuating component in the pre-pressing component.

25. A telephoto camera module, characterized in that: include: A light deflection module, located at the front end of the telephoto camera module, to reflect incident light from an object and change the propagation direction of the light; A lens module, comprising the lens driving device and the optical lens according to any one of claims 13 to 24; and Photosensitive module: the light emitted from the light deflection module passes through the lens module and reaches the photosensitive module, and the photosensitive module forms an image.

Images