Camera module and electronic equipment

Abstract

The invention provides a camera module and electronic equipment. The camera module comprises a lens, an SMA motor, a substrate and an image sensor, the SMA motor comprises a carrier, a seat body and an SMA driving assembly, the lens is fixed on the carrier, the SMA driving assembly is connected with the carrier and the seat body, and the SMA driving assembly is used for driving the carrier to move relative to the seat body. The shell of the SMA motor comprises a top plate and a bottom plate which are oppositely arranged, the bottom plate comprises a first part and four second parts, the four second parts are arranged on the peripheral side of the first part at intervals, and the distance between the second parts and the top plate is larger than that between the first part and the top plate. The four corners of the substrate are provided with recessed avoiding spaces, the first part is fixed to the substrate, at least part of the second part is located in the avoiding spaces, the image sensor is fixed to the middle of the substrate and electrically connected with the substrate, and the image sensor faces the lens. The camera module can have a relatively small module shoulder height under the condition that the shooting quality is ensured.

Description

Camera modules and electronic devices

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 15, 2023, with application number 202310284243.1 and application name “Camera module and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of camera technology, and in particular to a camera module and electronic equipment. Background Art

[0003] Currently, mobile phones and other electronic devices are often equipped with camera modules. These modules use motors to drive the optical lens to achieve automatic focusing (AF) and / or optical image stabilization (OIS), thereby ensuring clear images. SMA (shape memory alloy) motors, due to their high driving force and compact size, are becoming increasingly popular in camera modules.

[0004] Because the camera module's shoulder height affects the overall thickness of the electronic device and the shape of the camera's decorative components, impacting the phone's exterior design, camera modules strive for a smaller shoulder height. This height is primarily influenced by the motor height. However, simply reducing the SMA motor's height would affect its driving performance, resulting in poor camera module image quality. Therefore, minimizing the camera module's shoulder height while maintaining image quality is a key research topic for manufacturers.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a camera module and an electronic device. The camera module can have a smaller module shoulder height while ensuring the shooting quality, which is conducive to the thin design of the electronic device.

[0007] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0008] In a first aspect, the present application provides a camera module. The camera module includes a lens and an SMA motor. The SMA motor includes a carrier, a base, and an SMA drive assembly. The lens is fixed to the carrier, and the SMA drive assembly connects the carrier and the base. The SMA drive assembly is used to drive the carrier to move relative to the base to achieve autofocus and / or optical image stabilization.

[0009] The SMA motor also includes a top plate and a bottom plate arranged opposite to each other, the carrier, the base and the SMA drive assembly are located between the top plate and the bottom plate, the bottom plate is provided with a first through hole facing the lens, the bottom plate includes a first part and four second parts, the first part is arranged around the first through hole, the four second parts are arranged at intervals on the outer peripheral side of the first part, and the distance between the second part and the top plate is greater than the distance between the first part and the top plate.

[0010] The camera module also includes a substrate and an image sensor. The four corners of the substrate are provided with recessed avoidance spaces. The first part is fixed to the substrate, and the second part is at least partially located in the avoidance space. The image sensor is fixed to the middle of the substrate and electrically connected to the substrate. The image sensor is arranged facing the lens.

[0011] In this application, the SMA motor has a simple structure, a large driving force, and a small size. It can achieve both autofocus and optical image stabilization, while also reducing the size of the camera module.

[0012] In this application, the shoulder height H of the camera module, the height H1 of the SMA motor in the third direction, the thickness H2 of the substrate in the third direction, and the depth T of the second portion of the bottom plate extending into the clearance space of the substrate satisfy the following equation: H = H1 + H2 - T. The depth T of the second portion of the bottom plate extending into the clearance space of the substrate refers to the distance in the third direction between the surface of the second portion of the bottom plate away from the top plate and the surface of the first portion of the substrate near the bottom plate.

[0013] In this application, the bottom plate of the SMA motor adopts a step structure, so that the distance between the second part of the bottom plate and the top plate is larger, so as to ensure the driving performance of the SMA motor, thereby ensuring the shooting quality of the camera module; at the same time, the distance between the first part of the bottom plate and the top plate is smaller, the first part of the bottom plate is fixed to the substrate, and the second part of the bottom plate is embedded in the avoidance space of the substrate, so that the height of the SMA motor and the photosensitive component after assembly is smaller, thereby effectively reducing the shoulder height of the camera module, realizing the thinning of the camera module, and reducing the impact on the overall thickness and appearance of the electronic device using the camera module.

[0014] In some embodiments, a first distance is formed between the surface of the second portion of the bottom plate away from the top plate and the surface of the top plate away from the bottom plate, and a second distance is formed between the surface of the substrate away from the top plate and the surface of the top plate away from the bottom plate. The first distance is slightly smaller than the second distance, so as to reduce the shoulder height of the camera module while reserving the assembly tolerance of the SMA motor and the photosensitive component in the third direction, thereby improving the assembly accuracy of the camera module. In other embodiments, the surface of the second portion of the bottom plate away from the top plate can also be flush with the surface of the substrate away from the top plate to further reduce the shoulder height of the camera module. In other words, the depth T of the second portion of the bottom plate extending into the avoidance space of the substrate can be close to the sum of the thickness of the substrate and the first adhesive layer. In some embodiments, the shoulder height of the camera module can be reduced by approximately 0.4 mm to 0.6 mm, for example, by approximately 0.5 mm, compared to the traditional solution.

[0015] In some possible embodiments, the SMA drive assembly includes four groups of drive units, which are evenly arranged around the circumference of the carrier. Each group of drive units includes a pair of movable jaws, a pair of fixed jaws, and two SMA wires. The pair of movable jaws is fixed to the carrier, and the pair of fixed jaws is fixed to the base. The pair of movable jaws and the pair of fixed jaws are spaced apart along the circumference of the carrier, and the two SMA wires are cross-connected between the pair of movable jaws and the pair of fixed jaws. Along the circumference of the carrier, the pairs of movable jaws of two adjacent groups of drive units are arranged adjacent to each other, and the pairs of fixed jaws of two adjacent groups of drive units are arranged adjacent to each other.

[0016] In some possible embodiments, the pair of movable jaws includes a first movable jaw and a second movable jaw, the second movable jaw being located between the first movable jaw and the base plate, and the second movable jaw being disposed directly opposite the second portion. In this case, when the second movable jaw is projected onto the base plate along the third direction, the projection falls on the second portion of the base plate.

[0017] In this embodiment, the distance between the second part of the bottom plate and the top plate is greater than the distance between the first and third parts of the bottom plate and the top plate, and the second movable clamping claw is arranged opposite the second part of the bottom plate, so that the housing can reduce the distance between the first and third parts of the bottom plate and the top plate when the distance between the second part of the bottom plate and the top plate is greater than or equal to the sum of the upstroke, downstroke and clamping claw height of the SMA motor, so as to compress the local height of the SMA motor, thereby facilitating the compact arrangement of the SMA motor with other structures when assembled in the camera module, so as to reduce the shoulder height of the camera module.

[0018] In some embodiments, during the focusing process of the SMA motor, when the carrier sinks relative to the base, the second movable claw may partially extend into the first sinking groove.

[0019] In some embodiments, the first fixed jaw can be positioned directly opposite the second portion of the base plate. That is, within the same drive unit, the second movable jaw faces one of the second portions of the base plate, while the first fixed jaw faces another second portion of the base plate. Because the distance between the second portion of the base plate and the top plate is relatively large, there is ample space for the first and second fixed jaws to be arranged, ensuring that the spacing between the first and second fixed jaws in the third direction meets design requirements.

[0020] In some possible implementations, within the same drive unit, the first and second movable jaws are arranged parallel to the optical axis of the lens. The first and second SMA wires are of equal length, and the first and second SMA wires are inclined at equal angles relative to the optical axis of the lens. The first and second fixed jaws can also be arranged parallel to the optical axis of the lens, i.e., parallel to the third direction.

[0021] In this embodiment, the first movable jaw and the second movable jaw have the same structure and are arranged in a direction parallel to the third direction, achieving vertical symmetry. This reduces assembly requirements, facilitates debugging, and improves the assembly yield of the SMA motor. The first fixed jaw and the second fixed jaw have the same structure and are arranged in a direction parallel to the third direction. This reduces assembly requirements, facilitates debugging, and improves the assembly yield of the SMA motor.

[0022] Among them, the pair of movable jaws and the pair of fixed jaws of the SMA drive assembly can also be arranged symmetrically with respect to the left and right, that is, symmetrically relative to the XZ plane or symmetrically relative to the YZ plane, so as to further reduce the assembly requirements and debugging difficulty and improve the assembly yield of the SMA motor.

[0023] In some possible embodiments, the carrier includes a first side surface and a fourth side surface disposed adjacent to each other, wherein the intersection of the first side surface and the fourth side surface forms a first ridgeline, wherein a pair of movable jaws of one set of drive units is fixed to the first side surface, and a pair of movable jaws of another set of drive units is fixed to the fourth side surface. Within the same set of drive units, the distance between the second movable jaw and the first ridgeline is smaller than the distance between the first movable jaw and the first ridgeline.

[0024] In this embodiment, the SMA drive assembly's movable and fixed jaws are arranged asymmetrically in a vertical arrangement. Multiple SMA wires translate perpendicularly to the third direction and away from the outer extension of the base, avoiding the extension. This maintains a constant gap between the multiple SMA wires and the extension, ensuring reliable operation of the SMA motor. Furthermore, since the space around the first ridge is relatively large, providing room for the jaws to move, moving the movable jaw toward this space improves the space utilization of the SMA motor.

[0025] The first movable jaw and the second movable jaw are independent components, so as to respectively supply power to the first SMA wire and the second SMA wire. Alternatively, the first movable jaw and the second movable jaw can be connected to form a whole, so as to simplify the structure of the SMA motor and facilitate assembly.

[0026] Among them, the height of the first connecting column and the height of the second connecting column of the carrier are greater than the height of the first main body. At this time, it can ensure that the height between the first movable claw and the second movable claw (that is, the claw height) meets the design requirements, and can also form a gap between the first main body and the second main body of the base body, so that the carrier can move in the third direction relative to the base body.

[0027] In some possible implementations, the projections of the two SMA wires onto a reference surface form an intersection. The reference surface is parallel to the optical axis of the lens and to the two SMA wires, and the projection of the lens' optical axis onto the reference surface overlaps the intersection. In this case, the intersection of the two SMA wires is centered, aligning the lens' optical axis in either the first or second direction.

[0028] In this embodiment, the first movable jaw, first SMA wire, and first fixed jaw are symmetrical with the second movable jaw, second SMA wire, and first fixed jaw relative to the XZ plane or the YZ plane, making the driving action of the SMA motor drive assembly easier to achieve and achieving high driving precision. In other embodiments, the intersection of the two SMA wires can also be positioned non-centrally, for example, closer to the first edge line or the second edge line relative to the optical axis of the lens.

[0029] In some possible embodiments, the carrier includes a first body, a first connecting post, and a second connecting post. The first body includes four first corners, the first connecting post and the second connecting post are respectively fixed to two diagonally opposite first corners, the movable jaws of the four drive units are fixed to the first connecting post and the second connecting post, and the other two diagonally opposite first corners are respectively provided with a first notch and a second notch.

[0030] The base body includes a second main body, a third connecting column and a fourth connecting column. The second main body includes four second corners. The third connecting column and the fourth connecting column are respectively fixed to two of the diagonal second corners. The fixed claws of the four groups of drive units are fixed to the third connecting column and the fourth connecting column. The other two diagonal second corners are respectively provided with a third notch and a fourth notch.

[0031] The second body is located between the first body and the bottom plate, the first connecting column is located in the third notch, the second connecting column is located in the fourth notch, the third connecting column is located in the first notch, and the fourth connecting column is located in the second notch.

[0032] In this application, to ensure smooth movement of the carrier relative to the base, the shape of the connecting post wall matches the shape of the notch wall. A gap exists between the connecting post wall and the notch wall, enabling the carrier to move relative to the base in the XY plane or tilt in any direction, thereby achieving optical image stabilization. When the carrier moves a certain distance relative to the base in the XY plane or tilts in any direction at a certain angle, the connecting post wall contacts the notch wall, preventing further movement of the carrier, thereby limiting the maximum distance the carrier can move and the maximum angle it can tilt.

[0033] The structure and assembly of the carrier, base, and four drive units can be symmetrical relative to the first plane and the second plane to improve the stability and reliability of the SMA motor drive. The arrangement direction of the first and second connecting posts and the axial direction of the carrier can jointly define a first plane, and the arrangement direction of the third and fourth connecting posts and the axial direction of the carrier can jointly define a second plane. The second plane can be perpendicular to the first plane.

[0034] In some possible embodiments, the second body further includes four second side portions, which are arranged alternately with the four second corner portions. The base further includes at least one extension portion, which is fixed to the outer side surfaces of the four second side portions. The extension portion is larger than the second body in a direction parallel to the optical axis of the lens, and at least one extension portion is provided with an exposed gold finger. In this embodiment, the greater height of the extension portion provides ample space for arranging the gold finger and other electrical connection structures.

[0035] In some possible embodiments, the base plate includes a circuit board and a reinforcement plate. The first portion is fixed to the circuit board, and the reinforcement plate is stacked on a side of the circuit board away from the first portion. The clearance space extends through the circuit board and the reinforcement plate. The reinforcement plate serves to increase the structural strength of the circuit board. Because the clearance space extends through the circuit board and the reinforcement plate, the second portion of the base plate can extend deeper into the base plate, further reducing the camera module's shoulder height.

[0036] In some possible embodiments, the substrate includes a circuit board and a reinforcement plate. The first portion is fixed to the circuit board, and the reinforcement plate is stacked on a side of the circuit board away from the first portion. The clearance space extends through the circuit board and partially exposes the reinforcement plate. The reinforcement plate is used to increase the structural strength of the circuit board.

[0037] In some possible implementations, the first portion is bonded to the circuit board, and the second portion is bonded to the reinforcement plate. Because the first portion of the SMA's base plate is fixedly connected to the substrate, and the second portion is also fixedly connected to the substrate, the connection area between the base plate and the substrate is larger, thereby reducing the risk of debonding between the base plate and the substrate and improving the structural reliability of the camera module.

[0038] In some possible implementations, the camera module further includes a filter and a filter holder. The filter holder is fixed to a side of the substrate near the lens and surrounds the image sensor. The filter is located between the lens and the image sensor and is fixed to the filter holder. The filter can be used to filter stray light from the scene light passing through the lens, thereby ensuring that the image captured by the camera module has better clarity.

[0039] In some possible embodiments, the base plate further includes a third portion. The third portion is located inwardly of the first portion, the first through hole is formed in the third portion, the distance between the third portion and the top plate is smaller than the distance between the first portion and the top plate, and the base is fixed to the third portion. The filter and filter holder are located between the first through hole and the base plate and / or between the third portion and the base plate.

[0040] In this embodiment, the filter and filter bracket of the photosensitive component can be arranged in the accommodation space between the bottom plate and the base plate to make the assembly structure of the SMA motor and the photosensitive component more compact, thereby reducing the height of the camera module in the third direction.

[0041] In some embodiments, the second body of the base is fixed to the third portion of the base plate. The extension of the base can be located between the third portion of the base plate and the first side panel, and between the first portion of the base plate and the top panel, that is, located above the first portion of the base plate. In this case, the assembly of the base and base plate can fully utilize the space on the base plate and reduce the height of the SMA motor in the third direction.

[0042] In some possible embodiments, the filter holder includes an insulating body and a magnetic conductive member, wherein the magnetic conductive member is embedded in the insulating body, which is fixed to a substrate, and the magnetic conductive member is electrically connected to the substrate. The filter holder can be formed using an insert-molding process. In this embodiment, the filter holder has a high structural strength, which helps reduce the risk of filter breakage.

[0043] In a camera module, because the multiple SMA wires of an SMA motor are controlled by PWM (Pulse-width modulation) voltage, the PWM signal can easily couple with the image sensor signal, causing interference to the image sensor and risks such as patterning (e.g., streaks) and lag. In this embodiment, the filter holder is located on the side of the image sensor close to the SMA motor. The magnetic member of the filter holder is grounded and has magnetic conductivity, thereby shielding or reducing interference from the SMA motor's PWM signal on the image sensor, thereby improving the imaging quality of the camera module.

[0044] In some possible implementations, the insulating body is frame-shaped, the magnetic conductive member is also frame-shaped, the magnetic conductive member protrudes from the inner circumference of the insulating body, and the optical filter is fixed to the magnetic conductive member. In this case, the magnetic conductive member provides a support step for the optical filter. Compared to the plastic step used in traditional filter holders, the thickness of the support step in this embodiment can be reduced from approximately 0.18mm to approximately 0.1mm, which helps reduce the back focus of the lens and thus the overall height of the camera module.

[0045] In some possible implementations, the camera module may further include a variable aperture, which has an aperture hole located on the light-entering side of the lens and has a variable size. The variable aperture is used to adjust the amount of light entering, allowing the camera module to maintain consistent image quality under various brightness conditions.

[0046] The iris diaphragm is fixed to the lens, thereby being fixed relative to the lens and being able to move synchronously with the lens to maintain a constant relative position between the aperture and the lens, thereby ensuring the camera module's image quality. Alternatively, the iris diaphragm can be fixed to other components of the camera module, such as the carrier of the SMA motor.

[0047] In a second aspect, the present application further provides an electronic device. The electronic device includes an image processor and any of the aforementioned camera modules, wherein the image processor is communicatively connected to the camera module. The camera module can have a small module shoulder height while ensuring image quality, thereby enhancing the shooting experience of the electronic device and facilitating a thinner design of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0049] FIG1 is a schematic structural diagram of an electronic device provided in some embodiments of the present application;

[0050] FIG2 is a schematic diagram of a partially exploded structure of the electronic device shown in FIG1 ;

[0051] FIG3 is a schematic structural diagram of the camera module shown in FIG2 in some embodiments;

[0052] FIG4 is a schematic diagram of a partially exploded structure of the camera module shown in FIG3 ;

[0053] FIG5 is a schematic structural diagram of the SMA motor shown in FIG4 in some embodiments;

[0054] FIG6 is a schematic structural diagram of the seat shown in FIG5 at another angle;

[0055] FIG7 is a schematic diagram of a portion of the structure of the SMA motor shown in FIG4 ;

[0056] FIG8 is a schematic structural diagram of the lower cover shown in FIG5 at another angle;

[0057] FIG9 is a schematic structural diagram of the lower cover shown in FIG8 at another angle;

[0058] FIG10 is a schematic cross-sectional view of the SMA motor shown in FIG4 taken along line AA;

[0059] FIG11 is a schematic cross-sectional view of the SMA motor shown in FIG4 taken along line BB;

[0060] FIG12 is a schematic diagram of the internal structure of the SMA motor shown in FIG4 in some other embodiments;

[0061] FIG13 is a schematic structural diagram of the SMA drive assembly of the SMA motor shown in FIG12 ;

[0062] FIG14 is a schematic structural diagram of the SMA drive assembly shown in FIG13 at another angle;

[0063] FIG15 is a schematic structural diagram of four drive units of the SMA drive assembly shown in FIG13;

[0064] FIG16 is a schematic diagram of the exploded structure of the photosensitive component shown in FIG4 ;

[0065] FIG17 is a schematic cross-sectional view of the structure of the photosensitive component shown in FIG4 taken along CC;

[0066] FIG18 is a schematic structural diagram of the photosensitive component shown in FIG4 at another angle;

[0067] FIG19 is a schematic structural diagram of a portion of the camera module shown in FIG3 at another angle;

[0068] FIG20 is a schematic structural diagram of the camera module shown in FIG3 at another angle;

[0069] FIG21 is a schematic cross-sectional view of the camera module shown in FIG3 taken along line DD;

[0070] FIG22 is a schematic structural diagram of the structure shown in FIG21 at another angle;

[0071] FIG23 is a schematic diagram of the cross-sectional structure of the camera module shown in FIG3 taken along line EE;

[0072] FIG24 is a schematic structural diagram of the camera module shown in FIG2 in other embodiments;

[0073] FIG25 is a schematic diagram of a partially exploded structure of the camera module shown in FIG24;

[0074] FIG26 is a schematic diagram of the exploded structure of the photosensitive component shown in FIG25;

[0075] FIG27 is a schematic diagram of the cross-sectional structure of the photosensitive component shown in FIG25 taken along the FF line;

[0076] FIG28 is a schematic diagram of the cross-sectional structure of the camera module shown in FIG24 taken along line GG;

[0077] FIG29 is a schematic structural diagram of the structure shown in FIG28 at another angle. DETAILED DESCRIPTION

[0078] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0079] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The directional terms mentioned in the embodiments of the present application, such as "upper", "lower", "inner", "outer", "top", "bottom", "side", "left", "right", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0080] The term "plurality" means at least two. The term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this document generally indicates an "or" relationship between the related objects.

[0081] The terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of such features.

[0082] In addition, in the embodiments of the present application, the limitations of the relative position relationship mentioned, such as parallel, perpendicular, aligned, etc., are all for the current state of the art, rather than absolutely strict limitations, and a small amount of deviation is allowed, and it is possible to be approximately parallel, approximately perpendicular, approximately aligned, etc. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees. For example, A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 degrees and 100 degrees.

[0083] The present application provides an electronic device, which is a type of electronic device with a camera function. The electronic device may be a portable electronic device or other suitable electronic device. For example, the electronic device may be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a camera, a personal computer, a notebook computer, an in-vehicle device, a wearable device, etc. The wearable device may be augmented reality (AR) glasses, an AR helmet, virtual reality (VR) glasses, or a VR helmet, etc.

[0084] Please refer to Figures 1 and 2. Figure 1 is a schematic diagram of the structure of an electronic device 100 provided in some embodiments of the present application, and Figure 2 is a schematic diagram of a partially exploded structure of the electronic device 100 shown in Figure 1. In this embodiment, the electronic device 100 is described as a mobile phone. It will be understood that Figures 1 and 2 only schematically illustrate some components included in the electronic device 100, and the actual shape, actual size, actual position and actual structure of these components are not limited to Figures 1 and 2. The electronic device 100 may also include more or fewer components than those in Figures 1 and 2.

[0085] In some embodiments, the electronic device 100 may include a screen 10, a back shell 20, a camera module 30, and a camera decorative cover 40. The screen 10 is used to display images, videos, etc. The screen 10 includes a transparent cover 101 and a display screen 102. The transparent cover 101 and the display screen 102 are stacked and fixedly connected. The transparent cover 101 is mainly used to protect the display screen 102 and prevent dust. The material of the transparent cover 101 includes but is not limited to glass. The display screen 102 can be a flexible display screen or a rigid display screen. For example, the display screen 102 may be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (OLED) display screen, a micro organic light-emitting diode (OLED) display screen, a micro organic light-emitting diode (OLED) display screen, a quantum dot light-emitting diode (QLED) display screen, a liquid crystal display (LCD), etc.

[0086] Exemplarily, the back shell 20 is used to protect the internal electronic components of the electronic device 100. The back shell 20 includes a back cover 201 and a frame 202. The back cover 201 is located on the side of the display screen 102 away from the transparent cover plate 101, and is stacked with the transparent cover plate 101 and the display screen 102. The frame 202 is fixed to the back cover 201. Exemplarily, the frame 202 can be fixed to the back cover 201 by adhesive. The frame 202 can also be an integrally molded structure with the back cover 201, that is, the frame 202 and the back cover 201 are an integral structure. The frame 202 is located between the back cover 201 and the transparent cover plate 101. The transparent cover plate 101 can be fixed to the frame 202 by adhesive. The transparent cover plate 101, the back cover 201 and the frame 202 enclose an internal storage space of the electronic device 100. The internal storage space accommodates the display screen 102.

[0087] For example, the camera module 30 is used to take photos / videos. For example, the camera module 30 can be located in the internal accommodation space of the electronic device 100. The camera module 30 can be used as a rear camera module or a front camera module.

[0088] For example, the light-incident surface of the camera module 30 faces the back cover 201. The back cover 201 is provided with a mounting opening 2011, and the camera decorative cover 40 covers and is fixed to the mounting opening 2011. The camera decorative cover 40 is used to protect the camera module 30. In some embodiments, the camera decorative cover 40 protrudes to the side of the back cover 201 away from the light-transmitting cover plate 101. In this way, the camera decorative cover 40 can increase the installation space of the camera module 30 in the thickness direction of the electronic device 100. In other embodiments, the camera decorative cover 40 can also be flush with the back cover 201 or recessed into the internal storage space of the electronic device 100. The camera decorative cover 40 is provided with a light-transmitting window 401. The light-transmitting window 401 allows scene light to enter the light-incident surface of the camera module 30. In this embodiment, the camera module 30 serves as the rear camera module 30 of the electronic device 100. For example, the camera module 30 can serve as a rear main camera module. In other embodiments, the camera module 30 may also be used as a rear wide-angle camera module or a telephoto camera module.

[0089] In other embodiments, the light incident surface of the camera module 30 faces the transparent cover plate 101. A light path avoidance hole is provided on the display screen 102. The light path avoidance hole allows scene light to pass through the transparent cover plate 101 and then enter the light incident surface of the camera module 30. In this way, the camera module 30 serves as the front camera module 30 of the electronic device 100.

[0090] In some embodiments, as shown in FIG2 , the electronic device 100 further includes a circuit board 50 and an image processor 60, and the circuit board 50 and the image processor 60 are located in the internal accommodation space of the electronic device 100, and the image processor 60 is fixed to the circuit board 50 and electrically connected to the circuit board 50. The image processor 60 is communicatively connected to the camera module 30. The image processor 60 is used to obtain image data from the camera module 30 and process the image data. Among them, the communication connection between the camera module 30 and the image processor 60 may include data transmission through electrical connection methods such as wiring, and data transmission may also be achieved through coupling and other methods. It is understandable that the camera module 30 and the image processor 60 may also achieve communication connection through other methods that can achieve data transmission.

[0091] In some embodiments, the electronic device 100 may further include an analog-to-digital converter (also referred to as an A / D converter, not shown). The analog-to-digital converter is connected between the camera module 30 and the image processor 60. The analog-to-digital converter is used to convert the signal generated by the camera module 30 into a digital image signal and transmit it to the image processor 60. The image processor 60 then processes the digital image signal and ultimately displays the image or video on the screen 10.

[0092] In some embodiments, the electronic device 100 may further include a memory (not shown), which is communicatively connected to the image processor 60. The image processor 60 processes the digital image signal and then transfers the image to the memory, so that the image can be retrieved from the memory and displayed on the screen 10 at any time when the image is needed. In some embodiments, the image processor 60 may also compress the processed digital image signal before storing it in the memory to save memory space.

[0093] In other embodiments, the electronic device 100 may not include the screen 10 and / or the camera decorative cover 40 .

[0094] Please refer to Figures 3 and 4. Figure 3 is a schematic diagram of the structure of the camera module 30 shown in Figure 2 in some embodiments, and Figure 4 is a schematic diagram of the partially exploded structure of the camera module 30 shown in Figure 3. It should be understood that Figures 3 and 4 only schematically illustrate some components of the camera module 30. The actual shape, size, position, and configuration of these components are not limited to Figures 3 and 4. The camera module 30 may also include more or fewer components than those shown in Figures 3 and 4.

[0095] For the convenience of the following description, the length direction of the camera module 30 is defined as the first direction X, the width direction of the camera module 30 is defined as the second direction Y, the second direction Y is perpendicular to the first direction X, and the height direction of the camera module 30 is defined as the third direction Z, which is perpendicular to the first direction X and the second direction Y. The XY plane is parallel to the first direction X and the second direction Y, the XZ plane is parallel to the first direction X and the third direction Z, and the YZ plane is parallel to the second direction Y and the third direction Z.

[0096] In some embodiments, the camera module 30 includes a lens 1 , an SMA motor 2 , a photosensitive component 3 , and a first adhesive layer 4 .

[0097] Among them, the lens 1 is used to image the scene being photographed. The optical axis 11 of the lens 1 is parallel to the third direction Z of the camera module 30. The lens 1 may include a lens barrel 12 and an optical lens group 13. The optical lens group 13 is fixed to the inner side of the lens barrel 12, and the lens barrel 12 is used to fix and protect the optical lens group 13. The optical lens group 13 includes at least one optical lens. When the optical lens group 13 includes multiple optical lenses, the multiple optical lenses are stacked along the direction of the optical axis 11 of the lens 1. By designing the structure and parameters of the optical lens group 13, lenses with different characteristics such as wide-angle, standard, and telephoto can be obtained.

[0098] Wherein, the lens 1 is fixed to the SMA motor 2. The SMA motor 2 is used to drive the lens 1 to move to achieve automatic focusing (AF) and / or optical image stabilization (OIS). For example, the SMA motor 2 can be used to drive the lens 1 to move along the third direction Z to achieve automatic focus. The SMA motor 2 can also be used to drive the lens 1 to move in the XY plane or tilt in any direction around to achieve optical image stabilization. The SMA motor 2 can also be used to achieve both automatic focus and optical image stabilization, which is not specifically limited here. Wherein, the SMA motor 2 can be fixed to the photosensitive component 3 through the first adhesive layer 4.

[0099] In some embodiments, the camera module 30 may further include a variable aperture (VA) (not shown). The variable aperture has an aperture hole located on the light-entering side of the lens 1, and the size of the aperture hole is variable. The variable aperture is used to adjust the amount of light entering, so that the camera module 30 can maintain constant image quality under various brightness conditions. In a high-brightness environment, the size of the aperture hole can be reduced to allow a relatively small amount of light to enter the lens 1; in a low-brightness environment, the size of the aperture hole can be increased to allow a relatively large amount of light to enter the lens 1. This achieves adjustment of the amount of light entering the lens 1 and ensures the image quality of the camera module 30. In some embodiments, the variable aperture is fixed to the lens 1 so as to be fixed relative to the lens 1, so that it can move synchronously with the lens 1 to keep the relative position of the aperture hole and the lens 1 unchanged, thereby ensuring the image quality of the camera module 30. In other embodiments, the variable aperture can also be fixed to other components of the camera module 30, such as the carrier of the SMA motor 2.

[0100] Please refer to FIG5 , which is a schematic diagram of the structure of the SMA motor 2 shown in FIG4 in some embodiments. FIG5 schematically illustrates some components of the SMA motor 2. The actual shape, size, position, and structure of these components are not limited to FIG5 . The SMA motor 2 may also include more or fewer components than those in FIG5 .

[0101] In some embodiments, the SMA motor 2 includes a carrier 21 , a base 22 , an SMA drive assembly 23 , and a housing 24 .

[0102] Exemplarily, the carrier 21 has a lens mounting hole 211, and both ends of the lens mounting hole 211 are open. The lens 1 is mounted in the lens mounting hole 211 of the carrier 21 to be fixed to the carrier 21. In some embodiments, the lens 1 can be mounted in the lens mounting hole 211 by a detachable connection method such as snap-on connection or threaded connection to facilitate the replacement of the lens 1. When the lens 1 is mounted in the lens mounting hole 211, the extension direction of the optical axis 11 of the lens 1 is consistent with the axial direction of the lens mounting hole 211. In other embodiments, the lens 1 can also be mounted in the lens mounting hole 211 by a non-detachable method such as bonding to improve the connection stability and firmness. The forming material of the carrier 21 may include but is not limited to metal and plastic. In some embodiments, the forming material of the carrier 21 is plastic.

[0103] The carrier 21 may have an axial direction and a circumferential direction. The axial direction of the carrier 21 is parallel to the optical axis 11 of the lens 1 , that is, parallel to the third direction Z. The circumferential direction of the carrier 21 is arranged around the axial direction of the carrier 21 .

[0104] Exemplarily, the carrier 21 may include a first main body 212, a first connecting column 213, and a second connecting column 214. The shape of the first main body 212 may be similar to a plate with an inner circle and an outer square. The aforementioned lens mounting hole 211 is formed on the inner side of the first main body 212. Exemplarily, the first main body 212 may include four first corners and four first sides, and the four first sides and the four first corners are arranged alternately along the circumference of the carrier 21 and surround the circumference of the lens mounting hole 211. Two of the first sides are arranged opposite to each other, and the other two first sides are also arranged opposite to each other. Two of the first corners are arranged diagonally, and the other two first corners are also arranged diagonally. The first connecting column 213 and the second connecting column 214 are respectively fixed to two of the diagonally opposite first corners, and the other two diagonally opposite first corners are respectively provided with a first notch 215 and a second notch 216.

[0105] The first connecting column 213 may include a first side surface 2131 and a fourth side surface 2132 disposed adjacent to each other, with the intersection of the first side surface 2131 and the fourth side surface 2132 forming a first ridgeline 2133. In some embodiments, the first side surface 2131 may be coplanar with one of the outer side surfaces of the first body 212, and the fourth side surface 2132 may be coplanar with another outer side surface of the first body 212. The second connecting column 214 may include a second side surface 2141 and a third side surface 2142, with the intersection of the second side surface 2141 and the third side surface 2142 forming a second ridgeline 2143. In some embodiments, the second side surface 2141 may be coplanar with another outer side surface of the first body 212, and the third side surface 2142 may be coplanar with another outer side surface of the first body 212.

[0106] In the axial direction of the carrier 21, the height of the first connecting pillar 213 and the height of the second connecting pillar 214 may be greater than the height of the first body 212. Both ends of the first connecting pillar 213 and the second connecting pillar 214 may protrude from two surfaces of the first body 212, or one end of the first connecting pillar 213 and the second connecting pillar 214 may protrude from one surface of the first body 212.

[0107] The first notch 215 and the second notch 216 may be spaces recessed from the outer side of the first body 212 toward the inner side of the first body 212. The first notch 215 and the second notch 216 penetrate the first body 212 along the axial direction of the carrier 21. The walls of the first notch 215 and the second notch 216 may be stepped or have other shapes.

[0108] Please refer to FIG. 5 and FIG. 6 . FIG. 6 is a schematic structural diagram of the base body 22 shown in FIG. 5 at another angle.

[0109] In some embodiments, the base 22 may include a second body 221, a third connecting post 222, a fourth connecting post 223, and at least one extension 224. The second body 221 may be shaped similarly to a plate with a circular inner surface and a square outer surface. A movable hole 225 is formed on the inner side of the second body 221, extending through the second body 221 axially along the base 22. For example, the second body 221 may include four second corners and four second sides. The four second sides and the four second corners are arranged alternately along the circumference of the base 22 and surround the movable hole 225. Two of the second sides are disposed opposite each other, and the other two second sides are also disposed opposite each other. Two of the second corners are arranged diagonally, and the other two second corners are also arranged diagonally. The third connecting post 222 and the fourth connecting post 223 are respectively fixed to two of the diagonally opposite second corners. The other two diagonally opposite second corners are provided with a third notch 226 and a fourth notch 227, respectively.

[0110] In the axial direction of the base 22, the height of the third connecting column 222 and the fourth connecting column 223 is greater than the height of the second body 221. The third connecting column 222 and the fourth connecting column 223 may protrude toward one side of the second body 221 relative to the second body 221.

[0111] The third connecting column 222 may include a first fixing surface 2221 and a second fixing surface 2222 adjacent to each other, with the intersection of the first fixing surface 2221 and the second fixing surface 2222 forming a third ridgeline 2223. In some embodiments, the first fixing surface 2221 may be coplanar with one of the outer side surfaces of the second body 221, and the second fixing surface 2222 may be coplanar with another outer side surface of the second body 221. The fourth connecting column 223 may include a third fixing surface 2231 and a fourth fixing surface 2232, with the intersection of the third fixing surface 2231 and the fourth fixing surface 2232 forming a fourth ridgeline 2233. In some embodiments, the third fixing surface 2231 may be coplanar with another outer side surface of the second body 221, and the fourth fixing surface 2232 may be coplanar with another outer side surface of the second body 221.

[0112] The third notch 226 and the fourth notch 227 may be recessed spaces extending from the outer side of the second body 221 toward the inner side of the second body 221. The third notch 226 and the fourth notch 227 extend through the second body 221 along the axial direction of the base 22. The walls of the third notch 226 and the fourth notch 227 may be stepped or have other shapes.

[0113] Among them, the number of extension parts 224 can be one or more, and the following embodiments are described by taking the number of extension parts 224 as four as an example. The four extension parts 224 are respectively fixed to the outer side surfaces of the four second side parts. In the axial direction of the base body 22, the size of the extension part 224 is larger than the size of the second main body 221. Among them, at least one extension part 224 is provided with an exposed gold finger (not shown in the figure). For example, two extension parts 224 arranged opposite to each other are provided with gold fingers. In other embodiments, the number of extension parts 224 can also be two, and the two extension parts 224 can be arranged opposite to each other. Since the height of the extension part 224 is relatively large, there can be more sufficient space to realize the arrangement of gold fingers and other electrical connection structures.

[0114] In some embodiments, the base 22 may include an insulating portion and a conductive portion. The conductive portion may be embedded in the insulating portion and used to provide an electrical connection structure. The conductive portion may also form the aforementioned gold finger, and the electrical connection structure connects the aforementioned gold finger. The insulating portion may be made of an insulating material such as plastic. The conductive portion may be made of a metal material such as steel or copper.

[0115] Please refer to FIG. 5 and FIG. 7 . FIG. 7 is a partial structural diagram of the SMA motor 2 shown in FIG. 4 .

[0116] In some embodiments, the carrier 21 is assembled with the base 22, and the axial direction of the base 22 coincides with the axial direction of the carrier 21, that is, both are parallel to the optical axis 11 of the lens 1 and parallel to the third direction Z. The first body 212 of the carrier 21 and the second body 221 of the base 22 are stacked along the third direction Z, and the movable hole 225 of the second body 221 is opposite to and connected to the lens mounting hole 211 of the first body 212. The four first corners of the first body 212 correspond to the four second corners of the second body 221. The first connecting post 213 of the carrier 21 is partially located in the third notch 226 of the base 22, the second connecting post 214 of the carrier 21 is partially located in the fourth notch 227 of the base 22, the third connecting post 222 of the base 22 is partially located in the first notch 215 of the carrier 21, and the fourth connecting post 223 of the base 22 is partially located in the second notch 216 of the carrier 21.

[0117] Exemplarily, an SMA drive assembly 23 connects the carrier 21 and the base 22. The SMA drive assembly 23 is used to drive the carrier 21 to move relative to the base 22 to achieve autofocus and / or optical image stabilization. Specifically, the SMA drive assembly 23 is connected between the carrier 21 and the base 22. The SMA drive assembly 23 supports the carrier 21 on the base 22 and is also used to drive the carrier 21 and the lens 1 to move together along the third direction Z to achieve autofocus. Alternatively, the SMA drive assembly 23 is used to drive the carrier 21 and the lens 1 to move together within the XY plane or tilt in any direction around it to achieve optical image stabilization.

[0118] Exemplarily, the SMA drive assembly 23 includes four groups of drive units 23a, which are evenly arranged around the circumference of the carrier 21. Each group of drive units 23a includes a pair of movable claws (231, 232), a pair of fixed claws (233, 234) and two SMA wires (235, 236). The pair of movable claws (231, 232) is fixed to the carrier 21, and the pair of fixed claws (233, 234) is fixed to the base 22. The pair of movable claws (231, 232) and the pair of fixed claws (233, 234) are spaced apart along the circumference of the carrier 21, and the two SMA wires (235, 236) are cross-connected between the pair of movable claws (231, 232) and the pair of fixed claws (233, 234). Among them, a pair of movable jaws (231, 232) includes a first movable jaw 231 and a second movable jaw 232, a pair of fixed jaws (233, 234) includes a first fixed jaw 233 and a second fixed jaw 234, and two SMA wires (235, 236) include a first SMA wire 235 and a second SMA wire 236, the first SMA wire 235 connects the first movable jaw 231 and the first fixed jaw 233, the second SMA wire 236 connects the second movable jaw 232 and the second fixed jaw 234, and the first SMA wire 235 and the second SMA wire 236 cross.

[0119] In the embodiment, along the circumference of the carrier 21, a pair of movable claws (231, 232) of two adjacent groups of drive units 23a are arranged adjacent to each other, or a pair of fixed claws (233, 234) of two adjacent groups of drive units 23a are arranged adjacent to each other. For example, the movable claws (231, 232) of four groups of drive units 23a are fixed to the first connecting column 213 and the second connecting column 214. The movable claws (231, 232) of two groups of drive units 23a are fixed to the first connecting column 213, and the movable claws (231, 232) of the other two groups of drive units 23a are fixed to the second connecting column 214. Specifically, a pair of movable claws (231, 232) of one group of driving units 23a is fixed to the first side surface 2131 of the first connecting column 213, a pair of movable claws (231, 232) of another group of driving units 23a is fixed to the fourth side surface 2132 of the first connecting column 213, a pair of movable claws (231, 232) of another group of driving units 23a is fixed to the second side surface 2141 of the second connecting column 214, and a pair of movable claws (231, 232) of another group of driving units 23a is fixed to the third side surface 2142 of the second connecting column 214.

[0120] The fixed claws (233, 234) of the four groups of drive units 23a are fixed to the third connecting column 222 and the fourth connecting column 223. The fixed claws (233, 234) of two groups of drive units 23a are fixed to the third connecting column 222, and the fixed claws (233, 234) of the other two groups of drive units 23a are fixed to the fourth connecting column 223. Specifically, a pair of fixed claws (233, 234) of one group of drive units 23a is fixed to the first fixed surface 2221 of the third connecting column 222, a pair of fixed claws (233, 234) of another group of drive units 23a is fixed to the second fixed surface 2222 of the third connecting column 222, a pair of fixed claws (233, 234) of another group of drive units 23a is fixed to the third fixed surface 2231 of the fourth connecting column 223, and a pair of fixed claws (233, 234) of another group of drive units 23a is fixed to the fourth fixed surface 2232 of the fourth connecting column 223.

[0121] The SMA wires (235, 236) contract when heated by electricity. The SMA wires (235, 236) are made of shape memory alloy (SMA) material, such as nickel-titanium alloy. Shape memory alloy is a general term for a class of metals with shape memory effect. Generally, when a metal material is subjected to an external force, it first undergoes elastic deformation. If the external force is removed, the metal will return to its original shape. If the external force is continued to increase, when the metal's own yield point is reached, plastic deformation will occur. After the external force is removed, permanent deformation will remain, and the shape will not recover even if heated. Shape memory alloy is an alloy material that can completely eliminate the deformation that occurred at a lower temperature after heating and restore its original shape before deformation. The basic principle of the working of shape memory alloy material is to heat the material to above a critical temperature for shape memory heat treatment (training), so that it undergoes a certain deformation. After cooling to form the martensite phase, when it is heated again to above the critical temperature, the low-temperature martensite phase is reversely transformed into the high-temperature austenite phase (i.e., a reverse transformation occurs), thereby restoring the state remembered before deformation.

[0122] In this embodiment, when the SMA wires (235, 236) are energized, the heat generated by the energization causes the temperature of the SMA wires (235, 236) to rise, causing the SMA wires (235, 236) to undergo a reverse phase transformation from the low-temperature martensite phase to the high-temperature austenite phase, restoring the memory before the transformation, thereby causing the SMA wires (235, 236) to contract. The change in length caused by the contraction of the SMA wires (235, 236) is essentially caused by the transformation of the material's crystal phase structure, that is, the transformation between martensite and austenite. The attraction between microscopic particles caused by this crystal structure change (i.e., the transformation of the gaps between atoms) causes the tensile force of the macroscopic SMA wires (235, 236) to be much greater than the electromagnetic force between ordinary magnet coils. Therefore, the contraction of the SMA wires (235, 236) can drive heavier loads, that is, can achieve a large load, so the SMA motor 2 can achieve a large driving force with a small size.

[0123] In this embodiment, since the SMA wires (235, 236) contract when energized and heated, the electrical signals of the eight SMA wires (235, 236) can be controlled to direct the combined force generated by the eight SMA wires (235, 236) on the carrier 21 in a desired direction, thereby driving the carrier 21 and the lens 1 to move. For example, the eight SMA wires (235, 236) can generate a combined force along the third direction Z, so that the carrier 21 drives the lens 1 to move along the third direction Z to achieve focusing. Alternatively, the eight SMA wires (235, 236) can generate a combined force on the XY plane, so that the carrier 21 drives the lens 1 to move on the XY plane to achieve optical image stabilization. In this embodiment, the SMA motor 2 has a simple structure, a large driving force, and a small size. It can achieve both autofocus and optical image stabilization, while also reducing the size of the camera module 30.

[0124] Exemplarily, to ensure smooth movement of the carrier 21 relative to the base 22, the shape of the wall surface of the connecting post matches the shape of the wall surface of the notch. For example, the shape of the wall surface of the first connecting post 213 facing the third notch 226 matches the shape of the wall surface of the third notch 226, and is also a stepped surface. The shape of the wall surface of the second connecting post 214 facing the fourth notch 227 matches the shape of the wall surface of the fourth notch 227, and is also a stepped surface. The shape of the wall surface of the third connecting post 222 facing the first notch 215 matches the shape of the wall surface of the first notch 215, and is also a stepped surface. The shape of the wall surface of the fourth connecting post 223 facing the second notch 216 matches the shape of the wall surface of the second notch 216, and is also a stepped surface. A gap exists between the wall surfaces of the connecting posts and the walls of the notch, which enables the carrier 21 to move relative to the base 22 in the XY plane or tilt in any direction around it, thereby achieving optical image stabilization. When the carrier 21 moves a certain distance relative to the base 22 on the XY plane or tilts a certain angle in any direction, the wall of the connecting column contacts the wall of the notch, preventing the carrier 21 from moving further, thereby limiting the maximum distance the carrier 21 can move and the maximum angle of tilt.

[0125] Exemplarily, the material forming the movable jaws (231, 232) can be a conductive material or an insulating material. In some embodiments, the material forming the movable jaws (231, 232) is a conductive material, such as metal. In this way, the movable jaws (231, 232) can serve as the connection terminal of the first electrode of the SMA wire (235, 236) to facilitate the connection of the SMA wire (235, 236). The first electrode is one of the positive electrode and the negative electrode. The material forming the fixed jaws (233, 234) can be a conductive material or an insulating material. In some embodiments, the material forming the fixed jaws (233, 234) is a conductive material, such as metal. In this way, the fixed jaws (233, 234) can serve as the connection terminal of the second electrode of the SMA wire (235, 236) to facilitate the connection of the SMA wire (235, 236). The second electrode is the other of the positive electrode and the negative electrode.

[0126] In the above embodiment, the first movable jaw 231 and the second movable jaw 232 are independent components, so as to respectively supply power to the first SMA wire 235 and the second SMA wire 236. In other embodiments, the first movable jaw 231 and the second movable jaw 232 may be connected to form a single unit, so as to simplify the structure of the SMA motor 2 and facilitate assembly.

[0127] Furthermore, the height of the first connecting post 213 and the second connecting post 214 of the carrier 21 are greater than the height of the first body 212. This ensures that the height between the first movable claw 231 and the second movable claw 232 (i.e., the claw height) meets design requirements, while also allowing a gap to be formed between the first body 212 and the second body 221 of the base 22, thereby enabling the carrier 21 to move relative to the base 22 in the third direction Z. In other embodiments, the height of the first connecting post 213 and the second connecting post 214 may be equal to or less than the height of the first body 212.

[0128] Furthermore, in the aforementioned embodiment, the structures and assembly arrangements of the carrier 21, base 22, and four drive units 23a can be symmetrical relative to the first plane and the second plane, thereby improving the stability and reliability of the drive of the SMA motor 2. Specifically, the arrangement direction I of the first and second connecting posts 213, 214 and the axial direction of the carrier 21 can collectively define a first plane, and the arrangement direction II of the third and fourth connecting posts 222, 223 and the axial direction of the carrier 21 can collectively define a second plane, which can be perpendicular to the first plane.

[0129] In other embodiments, the carrier 21 and the base 22 may have other structures, and the assembly structure of the drive assembly with the carrier 21 and the base 22 may also be implemented in other ways. For example, the structure and assembly structure of the carrier 21, the base 22, and the four drive units 23a can be designed to be centrally symmetrical with the optical axis 11 of the lens 1 as the center. In this case, the carrier 21 and the base 22 may be provided with four connecting posts. The present embodiment does not impose strict limitations on the structure and assembly structure of the carrier 21, the base 22, and the four drive units 23a.

[0130] Referring again to FIG5 , the housing 24 can be assembled from multiple parts. In some embodiments, the housing 24 includes a lower cover 24 a and an upper cover 24 b , which are assembled and matched to enclose the carrier 21 , the base 22 , and the SMA drive assembly 23 , thereby providing protection and dustproofing.

[0131] Please refer to FIG. 5 , FIG. 8 and FIG. 9 . FIG. 8 is a schematic structural diagram of the lower cover 24 a shown in FIG. 5 at another angle. FIG. 9 is a schematic structural diagram of the lower cover 24 a shown in FIG. 8 at another angle.

[0132] In some embodiments, the lower cover 24a may include a bottom plate 241 and a first side plate 242. A first through-hole 2411 is provided in the middle of the bottom plate 241, and the first side plate 242 is connected to the periphery of the bottom plate 241. For example, the bottom plate 241 may include a first portion 2412 and four second portions 2413. The first portion 2412 surrounds the first through-hole 2411. The first portion 2412 may be a continuous structure, for example, the shape of the first portion 2412 may resemble a frame. The first portion 2412 may include four sides and four corners, which are arranged alternately along the circumference of the lower cover 24a, with two sides being arranged opposite each other, and two other sides being arranged opposite each other, two corners being arranged diagonally, and another corner also being arranged diagonally. The sides may be straight, and the corners may be stepped or zigzag-shaped. The four second portions 2413 are spaced apart and arranged around the outer periphery of the first portion 2412. For example, the four second portions 2413 may be respectively disposed corresponding to the outer sides of the four corners of the first portion 2412. The second portion 2413 may be L-shaped.

[0133] For example, the bottom plate 241 may further include a third portion 2414, which is located inside the first portion 2412, and the first through hole 2411 is formed in the third portion 2414. The shape of the third portion 2414 may be similar to a plate with a circular inner portion and a square outer portion. The first portion 2412 may include four sides and four corners, which are arranged alternately along the circumference of the lower cover 24a, with two sides being arranged opposite each other, the other two sides being arranged opposite each other, the two corners being arranged diagonally, and the other corners also being arranged diagonally.

[0134] In this embodiment, the axial direction of the lower cover 24a is parallel to the third direction Z. In the third direction Z, the third portion 2414, the first portion 2412, and the second portion 2413 of the bottom plate 241 sequentially form steps. As shown in Figure 8, on the side near the first side plate 242, the top surfaces of the third portion 2414, the first portion 2412, and the second portion 2413 sequentially form steps, collectively forming a stepped surface. The top surface of the first portion 2412 is sunken relative to the top surface of the third portion 2414, and the top surface of the second portion 2413 is sunken relative to the top surface of the first portion 2412. As shown in Figure 9, on the side away from the first side plate 242, the bottom surface of the second part 2413, the bottom surface of the first part 2412 and the bottom surface of the third part 2414 form step differences in sequence, and together form a step surface; the bottom surface of the first part 2412 sinks relative to the bottom surface of the second part 2413, and the bottom surface of the third part 2414 sinks relative to the bottom surface of the first part 2412.

[0135] As shown in Figure 8 , on the side near the first side plate 242, the four second portions 2413 are recessed relative to the first portion 2412, correspondingly forming four first recessed grooves 2415. As shown in Figure 9 , on the side away from the first side plate 242, the third portion 2414 is recessed relative to the first portion 2412, correspondingly forming second recessed grooves 2416. The second recessed grooves 2416 are arranged around the first through hole 2411.

[0136] The bottom plate 241 may further include a first connecting portion connected between the first portion 2412 and the second portion 2413 , and a second connecting portion connected between the first portion 2412 and the third portion 2414 .

[0137] 5 again, in some embodiments, the upper cover 24b may include a top plate 243 and a second side plate 244. The top plate 243 has a second through hole 2431 in the middle thereof, and the second side plate 244 is connected to the periphery of the top plate 243. The top plate 243 may be in the shape of a flat plate.

[0138] 7 , 10 and 11 , FIG. 10 is a schematic cross-sectional structural diagram of the SMA motor 2 shown in FIG. 4 taken along AA, and FIG. 11 is a schematic cross-sectional structural diagram of the SMA motor 2 shown in FIG. 4 taken along BB.

[0139] In some embodiments, the top plate 243 and the bottom plate 241 of the housing 24 are arranged opposite to each other and arranged in the third direction Z. The first through hole 2411 and the second through hole 2431 are arranged opposite each other. The first side plate 242 and the second side plate 244 are located between the top plate 243 and the bottom plate 241, and the first side plate 242 and the second side plate 244 are fixedly connected so that the upper cover 24b and the lower cover 24a are aligned and fixedly connected. For example, the first side plate 242 and the second side plate 244 can be fixed together by means of threaded connection, clamping, gluing, etc. In other embodiments, the upper cover 24b may not be provided with the second side plate 244, or the lower cover 24a may not be provided with the first side plate 242, and the bottom plate 241 and the top plate 243 are connected by a side plate. The embodiments of the present application do not strictly limit the specific structure of the housing 24.

[0140] The distance between the third portion 2414 of the bottom plate 241 and the top plate 243 is smaller than the distance between the first portion 2412 of the bottom plate 241 and the top plate 243. In other words, the third portion 2414 of the bottom plate 241 sinks relative to the first portion 2412 of the bottom plate 241 toward the top plate 243, and the second sink 2416 is disposed away from the top plate 243. The distance between the second portion 2413 of the bottom plate 241 and the top plate 243 is greater than the distance between the first portion 2412 of the bottom plate 241 and the top plate 243. In other words, the second portion 2413 of the bottom plate 241 sinks relative to the first portion 2412 of the bottom plate 241 toward the top plate 243, and the first sink 2415 is disposed toward the top plate 243. At this time, the four corner areas of the housing 24 of the SMA motor 2 (corresponding to the second part 2413 of the base plate 241) have a larger height, the first circle area extending inward from the four corners of the housing 24 (corresponding to the first part 2412 of the base plate 241) has a medium height, and the second circle area extending inward from the first circle area (corresponding to the third part 2414 of the base plate 241) has a smaller height.

[0141] The carrier 21, base 22, and SMA drive assembly 23 are located between the top plate 243 and the bottom plate 241. The first through-hole 2411 of the bottom plate 241 and the second through-hole 2431 of the top plate 243 are positioned opposite the lens mounting hole 211 of the carrier 21 and the movable hole 225 of the base 22. The second body 221 of the base 22 is located between the first body 212 of the carrier 21 and the bottom plate 241. The base 22 is fixed to the bottom plate 241, for example, it can be fixed to the third portion 2414 of the bottom plate 241. In some embodiments, the second body 221 of the base 22 is fixed to the third portion 2414 of the bottom plate 241. The extension 224 of the base 22 can be located between the third portion 2414 of the bottom plate 241 and the first side plate 242, and between the first portion 2412 of the bottom plate 241 and the top plate 243, that is, located in the space above the first portion 2412 of the bottom plate 241. In this case, the assembly structure of the base 22 and the bottom plate 241 can fully utilize the space on the bottom plate 241, reducing the height of the SMA motor 2 in the third direction Z. The first and second connecting posts 213, 214 of the carrier 21, and the third and fourth connecting posts 222, 223 of the base 22 are arranged respectively near the four corners of the housing 24. In this case, the claws of the SMA drive assembly 23 are correspondingly arranged at the four corners of the interior space of the housing 24.

[0142] It is understood that, to meet driving requirements, the design values ​​of the SMA motor 2's jaw upstroke, jaw downstroke, and jaw height all have lower thresholds. The local height of the SMA motor 2's housing 24 corresponding to the jaw arrangement must satisfy the following requirements: the distance between the top plate 243 and the bottom plate 241 is greater than or equal to the sum of the upstroke, downstroke, and jaw height. The upstroke is the distance between the jaw of a pair of jaws closest to the top plate 243 and the top plate 243 in the third direction Z; the downstroke is the distance between the jaw of a pair of jaws closest to the bottom plate 241 and the bottom plate 241 in the third direction Z; and the jaw height is the distance between the two jaws of a pair of jaws in the third direction Z.

[0143] In this embodiment, the bottom plate 241 of the housing 24 of the SMA motor 2 adopts a step-difference design, so that the four corner areas of the housing 24 have the maximum height to meet the above-mentioned space requirements of the claws, thereby ensuring the driving performance of the SMA motor 2. At the same time, the inward areas of the four corners of the housing 24 are highly compressed to reduce the local height of the SMA motor 2.

[0144] In some embodiments, in the same set of drive units 23a, the second movable jaw 232 is located between the first movable jaw 231 and the bottom plate 241, and the first fixed jaw 233 is located between the second fixed jaw 234 and the bottom plate 241. In other words, in the same set of drive units 23a, the first movable jaw 231 is located near the top plate 243, the second movable jaw 232 is located near the bottom plate 241, the second fixed jaw 234 is located near the top plate 243, and the first fixed jaw 233 is located near the bottom plate 241.

[0145] For example, the second movable jaw 232 may be disposed opposite the second portion 2413 of the bottom plate 241. That is, when the second movable jaw 232 is projected onto the bottom plate 241 along the third direction Z, the projection falls on the second portion 2413 of the bottom plate 241. In this embodiment, the distance between the second part 2413 of the bottom plate 241 and the top plate 243 is greater than the distance between the first part 2412 and the third part 2414 of the bottom plate 241 and the top plate 243, and the second movable clamping claw 232 is arranged opposite the second part 2413 of the bottom plate 241, so that the housing 24 can reduce the distance between the first part 2412 and the third part 2414 of the bottom plate 241 and the top plate 243 when the distance between the second part 2413 of the bottom plate 241 and the top plate 243 is greater than or equal to the sum of the upstroke, downstroke and clamping claw height of the SMA motor 2, so as to compress the local height of the SMA motor 2, thereby facilitating the compact arrangement of the SMA motor 2 with other structures when assembled in the camera module 30, so as to reduce the shoulder height of the camera module 30.

[0146] In some embodiments, during the focusing process of the SMA motor 2 , when the carrier 21 sinks relative to the base 22 , the second movable claw 232 may partially extend into the first sinking groove 2415 .

[0147] In some embodiments, the first fixed claw 233 can be positioned directly opposite the second portion 2413 of the base plate 241. That is, within the same set of drive units 23a, the second movable claw 232 directly faces one of the second portions 2413 of the base plate 241, while the first fixed claw 233 directly faces the other second portion 2413 of the base plate 241. Because the distance between the second portion 2413 of the base plate 241 and the top plate 243 is relatively large, there is ample space for the first and second fixed claws 233, 234 to be arranged, which helps ensure that the spacing between the first and second fixed claws 233, 234 in the third direction Z meets design requirements.

[0148] In some embodiments, as shown in FIG11 , the first movable jaw 231 and the second movable jaw 232 can be arranged parallel to the third direction Z, that is, parallel to the optical axis 11 of the lens 1. The first SMA wire 235 and the second SMA wire 236 are of equal length, and the first SMA wire 235 and the second SMA wire 236 have the same inclination angle relative to the optical axis 11 of the lens 1. The first fixed jaw 233 and the second fixed jaw 234 can also be arranged parallel to the optical axis 11 of the lens 1, that is, parallel to the third direction Z.

[0149] In this embodiment, the first movable jaw 231 and the second movable jaw 232 have the same structure, and their arrangement direction is parallel to the third direction Z, which can achieve a vertically symmetrical arrangement, thereby reducing assembly requirements, facilitating debugging, and improving the assembly yield of the SMA motor 2. The first fixed jaw 233 and the second fixed jaw 234 have the same structure, and their arrangement direction is parallel to the third direction Z, which can achieve a vertically symmetrical arrangement, thereby reducing assembly requirements, facilitating debugging, and improving the assembly yield of the SMA motor 2.

[0150] Among them, the pair of movable claws (231, 232) and the pair of fixed claws (233, 234) of the SMA drive assembly 23 can also be arranged symmetrically with respect to the left and right, that is, symmetrical relative to the XZ plane or symmetrical relative to the YZ plane, so as to further reduce the assembly requirements and debugging difficulty and improve the assembly yield of the SMA motor 2.

[0151] It is understood that in the camera module 30, after the image target surface and lens specifications are determined, the length and angle (i.e., the angle with the optical axis 11 of the lens 1) of the multiple SMA wires (235, 236) of the SMA motor 2 are also determined to ensure image quality. Therefore, the drive unit 23a of the SMA motor 2 needs to be designed while maintaining the length and angle of the multiple SMA wires (235, 236). In the embodiment of the present application, when the local height of the SMA motor 2 is compressed, that is, when the distance between the first portion 2412 and the third portion 2414 of the bottom plate 241 and the top plate 243 is compressed, the components of the SMA motor 2 that need to change position will not interfere with the multiple SMA wires (235, 236). For example, the base 22 will move toward the top plate 243 along with the third portion 2414 of the bottom plate 241, and the extension 224 of the base 22 may contact the multiple SMA wires (235, 236). Since the extension portion 224 of the base 22 needs to be arranged with gold fingers to ensure electrical connection, the size of the extension portion 224 is difficult to compress. Therefore, in the embodiment of the present application, in order to ensure that a gap is always maintained between the base 22 and the multiple SMA wires (235, 236), the positions of the movable clamping jaws (231, 232), the SMA wires (235, 236) and the fixed clamping jaws (233, 234) are designed, for example, the SMA wires (235, 236) are translated so that the SMA wires (235, 236) avoid the extension portion 224 of the base 22.

[0152] Referring to Figures 12 to 15 , Figure 12 is a schematic diagram of the internal structure of the SMA motor 2 shown in Figure 4 in alternative embodiments. Figure 13 is a schematic diagram of the structure of the SMA drive assembly 23 of the SMA motor 2 shown in Figure 12 . Figure 14 is a schematic diagram of the structure of the SMA drive assembly 23 shown in Figure 13 from another angle. Figure 15 is a schematic diagram of the structure of the four drive units 23a of the SMA drive assembly 23 shown in Figure 13 . The SMA motor 2 of this embodiment can include most of the technical features of the SMA motor 2 of the above embodiment. The following mainly describes the differences between the two embodiments, and the common features are not repeated here.

[0153] In some embodiments, in the same group of drive units 23a fixed to the first connecting post 213 of the carrier 21, the distance between the second movable claw 232 and the first ridgeline 2133 is smaller than the distance between the first movable claw 231 and the first ridgeline 2133. In the same group of drive units 23a fixed to the third connecting post 222 of the base 22, the distance between the first fixed claw 233 and the third ridgeline 2223 is smaller than the distance between the second fixed claw 234 and the third ridgeline 2223. Similarly, in the same group of drive units 23a fixed to the second connecting post 214, the distance between the second movable claw 232 and the second ridgeline 2143 is smaller than the distance between the first movable claw 231 and the second ridgeline 2143. In the same group of drive units 23a fixed to the fourth connecting post 223, the distance between the first fixed claw 233 and the fourth ridgeline 2233 is smaller than the distance between the second fixed claw 234 and the fourth ridgeline 2233.

[0154] In this embodiment, the movable jaws (231, 232) and fixed jaws (233, 234) of the SMA drive assembly 23 are arranged asymmetrically in the vertical direction. The plurality of SMA wires (235, 236) are translated in a direction perpendicular to the third direction Z and away from the extension portion 224 of the base body 22 to avoid the extension portion 224 of the base body 22. A gap is always maintained between the plurality of SMA wires (235, 236) and the extension portion 224 of the base body 22, thereby ensuring the reliability of the operation of the SMA motor 2. In addition, since the space around the first ridge line 2133 and the second ridge line 2143 is a reserved space for the jaws to move, and this space is relatively large, moving the movable jaws toward this space is conducive to improving the space utilization of the SMA motor 2.

[0155] For example, the four drive units 23a can be symmetrical relative to the first plane and symmetrical relative to the second plane to improve the stability and reliability of the drive of the SMA motor 2. The arrangement direction I of the first connecting posts 213 and the second connecting posts 214 and the axial direction of the carrier 21 can jointly define a first plane, and the arrangement direction II of the third connecting posts 222 and the fourth connecting posts 223 and the axial direction of the carrier 21 can jointly define a second plane. The second plane can be perpendicular to the first plane.

[0156] Exemplarily, the intersection of the two SMA wires (235, 236) is centered, that is, aligned with the optical axis 11 of the lens 1 in the first direction X or the second direction Y. Specifically, the projections of the two SMA wires (235, 236) on the reference surface form an intersection point, the reference surface is parallel to the optical axis 11 of the lens 1 and parallel to the two SMA wires (235, 236), and the projection of the optical axis 11 of the lens 1 on the reference surface covers the intersection point.

[0157] In this embodiment, the first movable jaw 231, the first SMA wire 235, and the first fixed jaw 233 are symmetrical with the second movable jaw 232, the second SMA wire 236, and the first fixed jaw 233 relative to the XZ plane or the YZ plane, making the driving action of the drive assembly of the SMA motor 2 easier to achieve and improving driving precision. In other embodiments, the intersection of the two SMA wires (235, 236) can also be positioned non-centrally, for example, toward the first edge line 2133 or the second edge line 2143 relative to the optical axis 11 of the lens 1.

[0158] Please refer to Figures 4, 16, and 17. Figure 16 is a schematic diagram of the exploded structure of the photosensitive assembly 3 shown in Figure 4, and Figure 17 is a schematic diagram of the cross-sectional structure of the photosensitive assembly 3 shown in Figure 4 taken along CC. It will be understood that Figures 16 and 17 schematically illustrate some components included in the photosensitive assembly 3, and the actual shape, actual size, actual position, and actual structure of these components are not limited to Figures 16 and 17. The photosensitive assembly 3 may also include more or fewer components than those shown in Figures 16 and 17.

[0159] In some embodiments, the photosensitive component 3 includes a substrate 31 , an image sensor 32 , a first connecting layer 33 , a filter holder 34 , a second connecting layer 35 , a filter 36 and a third connecting layer 37 .

[0160] Exemplarily, the substrate 31 includes a circuit board 311 and a reinforcement plate 312. The reinforcement plate 312 is fixed to one side of the circuit board 311 in a stacked manner. The reinforcement plate 312 is used to increase the structural strength of the circuit board 311. The circuit board 311 can be a hard circuit board, a flexible circuit board, or a combination of hard and soft circuit board. The circuit board 311 can adopt an FR-4 dielectric board, a Rogers dielectric board, a mixed dielectric board of Rogers and FR-4, and so on. The reinforcement plate 312 can be a steel plate or an aluminum plate, etc. In other embodiments, the substrate 31 may not include the reinforcement plate 312.

[0161] The four corners of the substrate 31 are provided with recessed escape spaces 313. The escape spaces 313 can be recessed from the outside of the substrate 31 toward the inside of the substrate 31. The escape spaces 313 can be through-holes or grooves. This embodiment uses through-holes as an example. In this case, the escape spaces 313 extend through the circuit board 311 and the reinforcement plate 312 in the thickness direction of the substrate 31. The thickness direction of the substrate 31 is parallel to the third direction Z.

[0162] Among them, the middle part of the substrate 31 may also be provided with a mounting hole 314, which passes through the circuit board 311 and exposes a portion of the reinforcement plate 312. The image sensor 32 may be at least partially located in the mounting hole 314, thereby reducing the height of the camera module 30 in the third direction Z. The image sensor 32 may also be called a photosensitive chip, or may also be called a photosensitive element. The image sensor 32 is used to collect scene light passing through the lens 1 and convert the image information carried by the scene light into an electrical signal. The image sensor 32 may be fixedly connected to the reinforcement plate 312 through a first connecting layer 33. The first connecting layer 33 may be an adhesive layer, etc. In other embodiments, the substrate 31 may also not be provided with the mounting hole 314, and the image sensor 32 may be located on the side of the circuit board 311 away from the reinforcement plate 312, and the image sensor 32 may be fixedly connected to the circuit board 311 through the first connecting layer 33.

[0163] For example, the filter holder 34 can be generally frame-shaped. The filter holder 34 and the image sensor 32 are located on the same side of the substrate 31. The filter holder 34 is fixed to the substrate 31 and surrounds the image sensor 32. For example, the filter holder 34 can be fixed to the substrate 31 via a second connecting layer 35, which can be an adhesive layer, etc. The filter 36 is fixed to the filter holder 34 and is positioned facing the image sensor 32. The filter 36 can be fixed to the filter holder 34 via a third connecting layer 37, which can be an adhesive layer, etc.

[0164] In some embodiments, the filter holder 34 may include an insulating body 341 and a magnetic member 342, with the magnetic member 342 embedded in the insulating body 341. The filter holder 34 may be formed using an insert molding process. In this embodiment, the filter holder 34 has high structural strength, which helps reduce the risk of the filter 36 breaking. The insulating body 341 may be made of an insulating material such as plastic. The magnetic member 342 has high magnetic permeability and is also electrically conductive. In some embodiments, the magnetic member 342 may be entirely made of a magnetic material, such as, but not limited to, SPCC (steel-plate-cold-common, typically cold-rolled carbon steel sheet and strip), SUS430 (430 stainless steel), or 65Mn (spring steel). In other embodiments, the magnetic member 342 may be formed by coating a magnetic layer on the surface of a non-magnetic structural component to achieve magnetic conductivity. The non-magnetic conductive structural member may be, for example, a stainless steel metal member to provide a higher structural strength. The magnetic conductive layer may be, for example, a nickel metal layer, a copper metal layer, or the like.

[0165] Please refer to FIG. 17 and FIG. 18 . FIG. 18 is a schematic structural diagram of the photosensitive component 3 shown in FIG. 4 at another angle.

[0166] In some embodiments, the insulating body 341 of the filter holder 34 is fixed to the substrate 31 , and the magnetic conductive member 342 is electrically connected to the substrate 31 to achieve grounding.

[0167] The magnetic conductive member 342 can be fixed to the substrate 31 by solder ball welding, conductive adhesive, surface mount technology (SMT) or other methods.

[0168] Illustratively, the circuit board 311 of the substrate 31 may be provided with solder pads 3111, which are implemented by copper stripping through a portion of the conductive layer within the circuit board 311. The insulating body 341 of the filter holder 34 has a first groove 3411, which is recessed from the outer side of the insulating body 341 toward the interior of the insulating body 341 and extends through the insulating body 341 along the thickness of the filter holder 34. The thickness of the filter holder 34 is parallel to the third direction Z. A portion of the magnetic conductive member 342 is located within the first groove 3411, exposed relative to the insulating body 341. The magnetic conductive member 342 may have a second groove 3421, which communicates with the first groove 3411. The second groove 3421 extends from the outer side of the magnetic conductive member 342 toward the interior of the magnetic conductive member 342 and extends through the magnetic conductive member 342 along the thickness of the filter holder 34. The portion of the magnetic conductive member 342 exposed in the second groove 3421 can be approximately crescent-shaped or semi-frame-shaped. The second groove 3421 and the first groove 3411 are both positioned directly opposite the solder pad 3111 on the substrate 31. Solder 315 is applied to the second groove 3421, the first groove 3411, and the solder pad 3111 to electrically connect the magnetic conductive member 342 to the substrate 31, thereby grounding the magnetic conductive member 342.

[0169] In this embodiment, the structural design of the second groove 3421 and the first groove 3411 can guide the solder 315 during the soldering process, ensuring a stable solder structure and solder impedance. It is understood that in other embodiments, the insulating body 341 and the magnetic member 342 of the filter holder 34 can also use other structures to guide the solder 315 to ensure soldering quality, and this embodiment of the present application is not strictly limited to this. In other embodiments, conductive silver glue or other conductive materials or conductive structures can also be used to connect the magnetic member 342 to the substrate 31, and this embodiment of the present application is not strictly limited to this.

[0170] Referring again to Figures 16 and 17 , in some embodiments, the insulating body 341 of the filter holder 34 can be frame-shaped, and the magnetic conductive member 342 can be frame-shaped. The magnetic conductive member 342 protrudes from the inner circumference of the insulating body 341, and the filter 36 is fixed to the magnetic conductive member 342. In this case, the magnetic conductive member 342 is used to provide a support step for the filter 36. Compared to the plastic step used in traditional filter holders 34, the thickness of the support step in this embodiment can be reduced from approximately 0.18 mm to approximately 0.1 mm, which helps reduce the back focus of the lens 1 and thus the overall height of the camera module 30.

[0171] The filter 36 can be used to filter stray light from the scene light passing through the lens 1, thereby ensuring that the image captured by the camera module 30 has better clarity. The filter 36 can be, but is not limited to, a blue glass filter. For example, the filter 36 can also be an infrared cut filter (IRCF) or a double-pass filter. The double-pass filter can allow visible light and infrared light in the scene light to pass through at the same time, or allow visible light and other specific wavelengths of light (such as ultraviolet light) in the scene light to pass through at the same time, or allow infrared light and other specific wavelengths of light (such as ultraviolet light) to pass through at the same time.

[0172] Please refer to Figures 19 to 22. Figure 19 is a structural schematic diagram of a portion of the structure of the camera module 30 shown in Figure 3 at another angle, Figure 20 is a structural schematic diagram of the camera module 30 shown in Figure 3 at another angle, Figure 21 is a cross-sectional structural schematic diagram of the camera module 30 shown in Figure 3 taken along DD, and Figure 22 is a structural schematic diagram of the structure shown in Figure 21 at another angle.

[0173] In some embodiments, the first adhesive layer 4 is secured to the surface of the first portion 2412 of the bottom plate 241, away from the top plate 243. The first adhesive layer 4 is also secured to the substrate 31, securing the first portion 2412 of the bottom plate 241 to the substrate 31. The first portion 2412 of the bottom plate 241 can be secured to the circuit board 311 of the substrate 31, with the reinforcement plate 312 stacked on the side of the circuit board 311 away from the first portion 2412. The shape of the first adhesive layer 4 can be adapted to that of the first portion 2412 of the bottom plate 241 to increase the connection area and strength between the first portion 2412 of the bottom plate 241 and the substrate 31. The four second portions 2413 of the bottom plate 241 are at least partially located in the four clearance spaces 313 of the substrate 31, corresponding to each other.

[0174] In this embodiment, the shoulder height H of the camera module 30, the height H1 of the SMA motor 2 in the third direction Z, the thickness H2 of the substrate 31 in the third direction Z, and the depth T of the second portion 2413 of the bottom plate 241 extending into the clearance space 313 of the substrate 31 satisfy the following equation: H = H1 + H2 - T. The depth T of the second portion 2413 of the bottom plate 241 extending into the clearance space 313 of the substrate 31 is the distance in the third direction Z between the surface of the second portion 2413 of the bottom plate 241 away from the top plate 243 and the surface of the first portion 2412 of the substrate 31 closer to the bottom plate 241.

[0175] In this embodiment, the bottom plate 241 of the SMA motor 2 adopts a step structure, so that the distance between the second part 2413 of the bottom plate 241 and the top plate 243 is larger, so as to ensure the driving performance of the SMA motor 2, thereby ensuring the shooting quality of the camera module 30; at the same time, the distance between the first part 2412 of the bottom plate 241 and the top plate 243 is smaller, and the first part 2412 of the bottom plate 241 is fixed to the substrate 31, and the second part 2413 of the bottom plate 241 is embedded in the avoidance space 313 located on the substrate 31, so that the height of the SMA motor 2 and the photosensitive component 3 after assembly is smaller, thereby effectively reducing the shoulder height of the camera module 30, realizing the thinning of the camera module 30, and reducing the impact on the overall thickness and appearance of the electronic device 100 using the camera module 30.

[0176] In some embodiments, a first distance is formed between the surface of the second portion 2413 of the bottom plate 241 away from the top plate 243 and the surface of the top plate 243 away from the bottom plate 241, and a second distance is formed between the surface of the base plate 31 away from the top plate 243 and the surface of the top plate 243 away from the bottom plate 241. The first distance is slightly smaller than the second distance. This reduces the shoulder height of the camera module 30 while allowing for assembly tolerance between the SMA motor 2 and the photosensitive component 3 in the third direction Z, thereby improving the assembly accuracy of the camera module 30. In other embodiments, the surface of the second portion 2413 of the bottom plate 241 away from the top plate 243 may also be flush with the surface of the base plate 31 away from the top plate 243 to further reduce the shoulder height of the camera module 30. In other words, the depth T of the second portion 2413 of the bottom plate 241 extending into the avoidance space 313 of the substrate 31 can be close to the sum of the thickness of the substrate 31 and the first adhesive layer 4. In some embodiments, the shoulder height of the camera module 30 can be reduced by approximately 0.4 mm to 0.6 mm compared to the traditional solution, for example, a thickness of approximately 0.5 mm.

[0177] In some embodiments, the distance between the second portion 2413 of the bottom plate 241 of the SMA motor 2 and the top plate 243 can be approximately equal to the height of an existing SMA, so that the SMA motor 2 can simultaneously drive the carrier 21, the lens 1 fixed to the carrier 21, and the variable aperture fixed to the carrier 21 or the lens 1.

[0178] Please refer to FIG. 23 , which is a schematic cross-sectional structural diagram of the camera module 30 shown in FIG. 3 taken along line EE.

[0179] In some embodiments, the lens 1 is mounted in the lens mounting hole 211 of the carrier 21 to be fixed to the carrier 21. The lens 1 can be partially accommodated within the movable hole 225 of the base 22 to facilitate lowering the height of the camera module 30 in the third direction Z. The light-incident side of the lens 1 can be exposed through the second through hole 2431 of the top plate 243 of the housing 24, and the first through hole 2411 of the bottom plate 241 faces the lens 1. The image sensor 32 is fixed to the center of the substrate 31 and is electrically connected to the substrate 31. The image sensor 32 is arranged facing the lens 1.

[0180] The third portion 2414 of the bottom plate 241 is closer to the top plate 243 than the first portion 2412 of the bottom plate 241. This creates a receiving space 245 between the third portion 2414 of the bottom plate 241 and the substrate 31. The height of the receiving space 245 is the sum of the height of the second recess 2416 (shown in FIG. 19 ) and the thickness of the first adhesive layer 4. In this embodiment, part of the structure of the photosensitive assembly 3 can be arranged in the receiving space 245, making the assembly structure of the SMA motor 2 and the photosensitive assembly 3 more compact, thereby reducing the height of the camera module 30 in the third direction Z.

[0181] Illustratively, the filter holder 34 is fixed to a side of the substrate 31 near the lens 1, and the filter 36 is located between the lens 1 and the image sensor 32 and fixed to the filter holder 34. The filter 36 and the filter holder 34 are located between the first through hole 2411 and the substrate 31 and / or between the third portion 2414 of the bottom plate 241 and the substrate 31.

[0182] In the camera module 30, because the multiple SMA wires (235, 236) of the SMA motor 2 are controlled by PWM (Pulse-width modulation) voltage, the PWM signal is easily coupled with the signal of the image sensor 32, causing interference with the image sensor 32 and the risk of patterning (e.g., stripes) and lag. In this embodiment, the filter holder 34 is located on the side of the image sensor 32 close to the SMA motor 2. The magnetic member 342 of the filter holder 34 is grounded and has magnetic conductivity, thereby shielding or reducing interference of the PWM signal of the SMA motor 2 on the image sensor 32, thereby improving the imaging quality of the camera module 30.

[0183] Please refer to Figures 24 and 25. Figure 24 is a schematic diagram of the structure of the camera module 30 shown in Figure 2 in other embodiments, and Figure 25 is a schematic diagram of the partially exploded structure of the camera module 30 shown in Figure 24. The camera module 30 of this embodiment can include most of the technical features of the camera module 30 of the above embodiment. The following mainly describes the differences between the two, and most of the same contents between the two are not repeated. It can be understood that Figures 24 and 25 only schematically illustrate some components included in the camera module 30. The actual shape, actual size, actual position and actual structure of these components are not limited to Figures 24 and 25. The camera module 30 can also include more or fewer components compared to Figures 24 and 25.

[0184] In some embodiments, the camera module 30 includes a lens 1, an SMA motor 2, a photosensitive component 3, a first adhesive layer 4, and a second adhesive layer 5. The lens 1 is fixed to the SMA motor 2, which is used to drive the lens 1 to move to achieve autofocus and / or optical image stabilization. The SMA motor 2 can be fixed to the photosensitive component 3 via the first adhesive layer 4 and the second adhesive layer 5.

[0185] Please refer to Figures 26 and 27. Figure 26 is a schematic diagram of the exploded structure of the photosensitive assembly 3 shown in Figure 25, and Figure 27 is a schematic diagram of the cross-sectional structure of the photosensitive assembly 3 shown in Figure 25 taken along the FF line. It will be understood that Figures 26 and 27 schematically illustrate some components included in the photosensitive assembly 3, and the actual shape, size, position, and structure of these components are not limited to Figures 26 and 27. The photosensitive assembly 3 may also include more or fewer components than those shown in Figures 26 and 27.

[0186] In some embodiments, the photosensitive component 3 includes a substrate 31 , an image sensor 32 , a first connecting layer 33 , a filter holder 34 , a second connecting layer 35 , a filter 36 and a third connecting layer 37 .

[0187] Exemplarily, substrate 31 includes a circuit board 311 and a reinforcement plate 312. Reinforcement plate 312 is laminated and fixed to one side of circuit board 311. Reinforcement plate 312 is used to increase the structural strength of circuit board 311. Circuit board 311 can be a rigid circuit board, a flexible circuit board, or a combination of rigid and flexible circuit boards. Circuit board 311 can be made of FR-4 dielectric board, Rogers dielectric board, or a hybrid of Rogers and FR-4 dielectric board. Reinforcement plate 312 can be made of steel plate or aluminum plate.

[0188] The four corners of the base plate 31 are provided with recessed escape spaces 313. The escape spaces 313 can be recessed from the outside of the base plate 31 toward the inside of the base plate 31. The escape spaces 313 can be grooves. In this case, the escape spaces 313 extend through the circuit board 311 in the thickness direction of the base plate 311, exposing a portion of the reinforcement plate 312. The thickness direction of the base plate 31 is parallel to the third direction Z.

[0189] The substrate 31 may also have a mounting hole 314 in the middle. The mounting hole 314 extends through the circuit board 311, leaving a portion of the reinforcement plate 312 exposed. The image sensor 32 may be at least partially located in the mounting hole 314 and may be fixedly connected to the reinforcement plate 312 via a first connection layer 33. The first connection layer 33 may be an adhesive layer, for example. In other embodiments, the substrate 31 may not have the mounting hole 314, and the image sensor 32 may be located on the side of the circuit board 311 away from the reinforcement plate 312. The image sensor 32 may be fixedly connected to the circuit board 311 via the first connection layer 33.

[0190] For example, the filter holder 34 can be generally frame-shaped. The filter holder 34 and the image sensor 32 are located on the same side of the substrate 31. The filter holder 34 is fixed to the substrate 31 and surrounds the image sensor 32. For example, the filter holder 34 can be fixed to the substrate 31 via a second connecting layer 35, which can be an adhesive layer, etc. The filter 36 is fixed to the filter holder 34 and is positioned facing the image sensor 32. The filter 36 can be fixed to the filter holder 34 via a third connecting layer 37, which can be an adhesive layer, etc.

[0191] Please refer to Figures 28 and 29. Figure 28 is a schematic diagram of the cross-sectional structure of the camera module 30 shown in Figure 24 taken along GG, and Figure 29 is a schematic diagram of the structure shown in Figure 28 at another angle.

[0192] In some embodiments, the first portion 2412 of the bottom plate 241 of the SMA motor 2 is fixed to the circuit board 311 of the substrate 31, and the reinforcing plate 312 of the substrate 31 is stacked on a side of the circuit board 311 away from the first portion 2412 of the bottom plate 241. The second portion 2413 of the bottom plate 241 of the SMA motor 2 is fixed to the reinforcing plate 312 of the substrate 31. For example, the first portion 2412 of the bottom plate 241 can be bonded to the circuit board 311 of the substrate 31 via a first adhesive layer 4, and the second portion 2413 of the bottom plate 241 can be bonded to the reinforcing plate 312 of the substrate 31 via a second adhesive layer 5. The number of second adhesive layers 5 is set to four.

[0193] In this embodiment, the shoulder height H of the camera module 30, the height H1 of the SMA motor 2 in the third direction Z, the thickness H2 of the substrate 31 in the third direction Z, and the depth T of the second portion 2413 of the bottom plate 241 extending into the clearance space 313 of the substrate 31 satisfy the following equation: H = H1 + H2 - T. The depth T of the second portion 2413 of the bottom plate 241 extending into the clearance space 313 of the substrate 31 is the distance in the third direction Z between the surface of the second portion 2413 of the bottom plate 241 away from the top plate 243 and the surface of the first portion 2412 of the substrate 31 closer to the bottom plate 241.

[0194] In this embodiment, the bottom plate 241 of the SMA motor 2 adopts a step structure, so that the distance between the second part 2413 of the bottom plate 241 and the top plate 243 is larger, so as to ensure the driving performance of the SMA motor 2, thereby ensuring the shooting quality of the camera module 30; at the same time, the distance between the first part 2412 of the bottom plate 241 and the top plate 243 is smaller, and the first part 2412 of the bottom plate 241 is fixed to the substrate 31, and the second part 2413 of the bottom plate 241 is embedded in the avoidance space 313 located on the substrate 31, so that the height of the SMA motor 2 and the photosensitive component 3 after assembly is smaller, thereby effectively reducing the shoulder height of the camera module 30, realizing the thinning of the camera module 30, and reducing the impact on the overall thickness and appearance of the electronic device 100 using the camera module 30.

[0195] In addition, since the first part 2412 of the SMA base plate 241 is fixedly connected to the substrate 31, and the second part 2413 is also fixedly connected to the substrate 31, the connection area between the base plate 241 and the substrate 31 is larger, thereby reducing the risk of debonding between the base plate 241 and the substrate 31 and improving the structural reliability of the camera module 30.

[0196] In some embodiments, the depth T of the second portion 2413 of the bottom plate 241 extending into the avoidance space 313 of the substrate 31 can be close to the thickness of the circuit board 311. For example, the shoulder height of the camera module 30 can be reduced by approximately 0.2 mm to 0.4 mm compared to the traditional solution, for example, by approximately 0.25 mm to 0.3 mm.

[0197] In other embodiments, the second portion 2413 of the base plate 241 may not be bonded to the reinforcement plate 312, and the camera module 30 may not be provided with the second adhesive layer 5, so that the depth T of the second portion 2413 of the base plate 241 extending into the avoidance space 313 of the substrate 31 is larger, thereby further reducing the shoulder height of the camera module 30.

[0198] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the scope of protection of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0199] It should be noted that all the above drawings are for illustrative purposes only and do not represent the actual size of the product. Furthermore, the dimensional ratios between the components in the drawings are not intended to limit the actual product of the present application.

[0200] The above are only some of the embodiments and implementations of this application. The scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A camera module (30), characterized in that: The invention comprises a lens (1) and an SMA motor (2), wherein the SMA motor (2) comprises a carrier (21), a base (22) and an SMA drive assembly (23), wherein the lens (1) is fixed to the carrier (21), the SMA drive assembly (23) connects the carrier (21) and the base (22), and the SMA drive assembly (23) is used to drive the carrier (21) to move relative to the base (22) to achieve automatic focusing and / or optical image stabilization; The SMA motor (2) further comprises a top plate (243) and a bottom plate (241) which are arranged opposite to each other; the carrier (21), the base (22) and the SMA driving assembly (23) are located between the top plate (243) and the bottom plate (241); the bottom plate (241) is provided with a first through hole (2411) facing the lens (1); the bottom plate (241) comprises a first portion (2412) and four second portions (2413); the first portion (2412) is arranged around the first through hole (2411); the four second portions (2413) are arranged at intervals on the outer peripheral side of the first portion (2412); the distance between the second portion (2413) and the top plate (243) is greater than the distance between the first portion (2412) and the top plate (243); The camera module (30) further comprises a substrate (31) and an image sensor (32); four corners of the substrate (31) are provided with recessed avoidance spaces (313); the first portion (2412) is fixed to the substrate (31); the second portion (2413) is at least partially located in the avoidance space (313); the image sensor (32) is fixed to the middle of the substrate (31) and is electrically connected to the substrate (31); and the image sensor (32) is arranged facing the lens (1).

2. The camera module (30) according to claim 1, characterized in that: The SMA drive assembly (23) comprises four groups of drive units (23a), and the four groups of drive units (23a) are evenly arranged around the circumference of the carrier (21); Each group of the driving units (23a) comprises a pair of movable claws (231, 232), a pair of fixed claws (233, 234) and two SMA wires (235, 236); The pair of movable claws (231, 232) are fixed to the carrier (21), the pair of fixed claws (233, 234) are fixed to the base (22), the pair of movable claws (231, 232) and the pair of fixed claws (233, 234) are arranged at intervals along the circumference of the carrier (21), and the two SMA wires (235, 236) are cross-connected between the pair of movable claws (231, 232) and the pair of fixed claws (233, 234); Along the circumference of the carrier (21), a pair of movable claws (231, 232) of two adjacent groups of drive units (23a) are arranged adjacent to each other, or a pair of fixed claws (233, 234) of two adjacent groups of drive units (23a) are arranged adjacent to each other.

3. The camera module (30) according to claim 2, characterized in that: The pair of movable claws (231, 232) comprises a first movable claw (231) and a second movable claw (232), wherein the second movable claw (232) is located between the first movable claw (231) and the bottom plate (241), and the second movable claw (232) is arranged opposite to the second part (2413).

4. The camera module (30) according to claim 3, characterized in that: In the same group of the driving units (23a), the arrangement direction of the first movable claw (231) and the second movable claw (232) is parallel to the optical axis (11) of the lens (1).

5. The camera module (30) according to claim 3, characterized in that: The carrier (21) comprises a first side surface (2131) and a fourth side surface (2132) which are adjacently arranged, wherein the intersection of the first side surface (2131) and the fourth side surface (2132) forms a first ridge line (2133), wherein a pair of movable claws (231, 232) of one group of the driving units (23a) are fixed to the first side surface (2131), and a pair of movable claws (231, 232) of another group of the driving units (23a) are fixed to the fourth side surface (2132); In the same group of the driving units (23a), the distance between the second movable clamping claw (232) and the first ridge line (2133) is smaller than the distance between the first movable clamping claw (231) and the first ridge line (2133).

6. The camera module (30) according to claim 5, characterized in that: The projections of the two SMA wires (235, 236) on a reference plane form an intersection, the reference plane is parallel to the optical axis (11) of the lens (1) and to the two SMA wires (235, 236), and the projection of the optical axis (11) of the lens (1) on the reference plane covers the intersection.

7. The camera module (30) according to any one of claims 2 to 6, characterized in that: The carrier (21) comprises a first body (212), a first connecting column (213) and a second connecting column (214); the first body (212) comprises four first corners; the first connecting column (213) and the second connecting column (214) are respectively fixed to two of the first corners that are diagonally opposite to each other; the movable claws of the four groups of driving units (23a) are fixed to the first connecting column (213) and the second connecting column (214); and the other two first corners that are diagonally opposite to each other are respectively provided with a first notch (215) and a second notch (216); The seat body (22) comprises a second main body (221), a third connecting column (222) and a fourth connecting column (223); the second main body (221) comprises four second corner portions; the third connecting column (222) and the fourth connecting column (223) are respectively fixed to two of the second corner portions which are diagonally opposite to each other; the fixed claws of the four groups of the driving units (23a) are fixed to the third connecting column (222) and the fourth connecting column (223); the other two second corner portions which are diagonally opposite to each other are respectively provided with a third notch (226) and a fourth notch (227); The second body (221) is located between the first body (212) and the bottom plate (241), and the first connecting column (213) is The second connecting column (214) is partially located in the fourth notch (227), the third connecting column (222) is partially located in the first notch (215), and the fourth connecting column (223) is partially located in the second notch (216).

8. The camera module (30) according to claim 7, characterized in that: The second main body (221) further comprises four second side portions, wherein the four second side portions and the four second corner portions are arranged alternately one by one, and the seat body (22) further comprises at least one extension portion (224), wherein the at least one extension portion (224) is fixed to the outer side surfaces of the four second side portions; In a direction parallel to the optical axis (11) of the lens (1), the size of the extension part (224) is larger than the size of the second body (221), and at least one of the extension parts (224) is provided with an exposed gold finger.

9. The camera module (30) according to any one of claims 1 to 8, characterized in that: The substrate (31) comprises a circuit board (311) and a reinforcing plate (312); the first portion (2412) is fixed to the circuit board (311); the reinforcing plate (312) is stacked on a side of the circuit board (311) away from the first portion (2412); and the avoidance space (313) runs through the circuit board (311) and the reinforcing plate (312).

10. The camera module (30) according to any one of claims 1 to 8, characterized in that: The substrate (31) comprises a circuit board (311) and a reinforcing plate (312); the first portion (2412) is fixed to the circuit board (311); the reinforcing plate (312) is stacked on a side of the circuit board (311) away from the first portion (2412); and the avoidance space (313) passes through the circuit board (311) and exposes a portion of the reinforcing plate (312).

11. The camera module (30) according to claim 10, characterized in that: The first part (2412) is bonded to the circuit board (311), and the second part (2413) is bonded to the reinforcing plate (312).

12. The camera module (30) according to any one of claims 1 to 11, characterized in that: The camera module (30) further comprises a filter (36) and a filter holder (34); the filter holder (34) is fixed to a side of the substrate (31) close to the lens (1) and is arranged around the image sensor (32); the filter (36) is located between the lens (1) and the image sensor (32) and is fixed to the filter holder (34).

13. The camera module (30) according to claim 12, characterized in that: The bottom plate (241) further comprises a third portion (2414), the third portion (2414) being located at the inner side of the first portion (2412), the first through hole (2411) being formed in the third portion (2414), the distance between the third portion (2414) and the top plate (243) being smaller than the distance between the first portion (2412) and the top plate (243), and the seat body (22) being fixed to the third portion (2414); The optical filter (36) and the optical filter holder (34) are located between the first through hole (2411) and the substrate (31) and / or between the third part (2414) and the substrate (31).

14. The camera module (30) according to claim 12 or 13, characterized in that: The filter support (34) comprises an insulating body (341) and a magnetic conductive part (342), wherein the magnetic conductive part (342) is embedded in the insulating body (341), the insulating body (341) is fixed to the substrate (31), and the magnetic conductive part (342) is electrically connected to the substrate (31).

15. The camera module (30) according to claim 14, characterized in that: The insulating body (341) is frame-shaped, the magnetic conductive part (342) is frame-shaped, the magnetic conductive part (342) protrudes relative to the inner peripheral side surface of the insulating body (341), and the optical filter (36) is fixed to the magnetic conductive part (342).

16. An electronic device (100), characterized in that: It comprises an image processor (60) and a camera module (30) according to any one of claims 1 to 15, wherein the image processor (60) is communicatively connected to the camera module (30).

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