Camera module and electronic device

Abstract

This application provides a camera module and an electronic device. The camera module includes a lens, an SMA motor, a substrate, and an image sensor. 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, driving the carrier to move relative to the base. The SMA motor housing includes a top plate and a bottom plate opposite to each other. The bottom plate includes a first part and four second parts, which are spaced apart from each other on the outer periphery of the first part. The distance between the second parts and the top plate is greater than the distance between the first part and the top plate. The substrate has recessed clearance spaces at its four corners. The first part is fixed to the substrate, and at least part of the second part is located in the clearance space. The image sensor is fixed to the center of the substrate and electrically connected to the substrate, facing the lens. The above-described camera module can have a small module height while ensuring image quality.

Description

[0001] This application claims priority to Chinese Patent Application No. 202310284243.1, filed on March 15, 2023, entitled "Camera Module and Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of camera technology, and in particular to a camera module and electronic device. Background Technology

[0003] Currently, mobile phones and other electronic devices are typically 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 the clarity of images captured by the electronic devices. Among these, SMA (shape memory alloy) motors are increasingly widely used in camera modules due to their advantages of high driving force and small size.

[0004] Because the height of a camera module affects the overall thickness of an electronic device and the shape of the camera module's decorative components, thus impacting the phone's appearance, a low camera module height is desirable. The camera module's height is primarily influenced by the motor height; however, directly reducing the height of the SMA motor would negatively affect its driving performance, leading to poor image quality. Therefore, how to reduce the camera module's height while maintaining image quality is a crucial research direction for manufacturers. Summary of the Invention

[0005] This application provides a camera module and an electronic device. The camera module has a small module height while ensuring shooting quality, which is beneficial for the thin design of the electronic device.

[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, this 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.

[0008] The SMA motor also includes a top plate and a bottom plate arranged opposite each other. The carrier, the base and the SMA drive assembly are located between the top plate and the bottom plate. The bottom plate has 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 periphery of the first part. The distance between the second part and the top plate is greater than the distance between the first part and the top plate.

[0009] The camera module also includes a substrate and an image sensor. The substrate has recessed clearance spaces at its four corners. A first part is fixed to the substrate, and a second part is at least partially located in the clearance space. The image sensor is fixed to the middle of the substrate and electrically connected to the substrate. The image sensor is positioned facing the lens.

[0010] In this application, the SMA motor has a simple structure, large driving force, and small size, which can achieve both autofocus and optical image stabilization, while also reducing the size of the camera module.

[0011] 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 clearance space where the second part of the base plate extends into the substrate satisfy: H = H1 + H2 - T. Wherein, the depth T of the clearance space where the second part of the base plate extends into the substrate refers to the distance in the third direction between the surface of the second part of the base plate away from the top plate and the surface of the first part of the substrate near the base plate.

[0012] In this application, the base plate of the SMA motor adopts a stepped structure, which makes the distance between the second part of the base plate and the top plate larger, so as to ensure the driving performance of the SMA motor and thus ensure the shooting quality of the camera module; at the same time, the distance between the first part of the base plate and the top plate is smaller, the first part of the base plate is fixed to the substrate, and the second part of the base plate is embedded in the clearance 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.

[0013] In some embodiments, a first distance is formed between the surface of the second portion of the base plate away from the top plate and the surface of the top plate away from the base 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 base plate. The first distance is slightly smaller than the second distance, so as to allow for assembly tolerances of the SMA motor and the photosensitive component in the third direction while reducing the shoulder height of the camera module, thereby improving the assembly accuracy of the camera module. In other embodiments, the surface of the second portion of the base plate away from the top plate may 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 base plate extending into the clearance 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 of thickness compared to conventional solutions, for example, approximately 0.5 mm of thickness.

[0014] In some possible implementations, the SMA drive assembly includes four sets of drive units evenly arranged around the circumference of the carrier. Each drive unit includes a pair of movable jaws, a pair of fixed jaws, and two SMA threads. 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 threads are crossed and connected between the pair of movable jaws and the pair of fixed jaws. Along the circumference of the carrier, the pair of movable jaws of two adjacent drive units are arranged adjacent to each other, or the pair of fixed jaws of two adjacent drive units are arranged adjacent to each other.

[0015] In some possible implementations, a pair of movable jaws includes a first movable jaw and a second movable jaw, with the second movable jaw located between the first movable jaw and the base plate, and the second movable jaw positioned directly opposite the second portion. In this case, when the second movable jaw projects onto the base plate along a third direction, the projection falls on the second portion of the base plate.

[0016] In this embodiment, the distance between the second part of the base plate and the top plate is greater than the distance between the first part and the third part of the base plate and the top plate. The second moving claw is positioned directly opposite the second part of the base plate, so that the housing can reduce the distance between the first part and the third part of the base plate and the top plate when the distance between the second part of the base plate and the top plate is greater than or equal to the sum of the upper stroke, lower stroke and claw height of the SMA motor. This reduces the local height of the SMA motor, which is beneficial for the compact arrangement of the SMA motor with other structures when it is assembled in the camera module, thereby reducing the shoulder height of the camera module.

[0017] In some implementations, during the focusing process, when the carrier sinks relative to the base, the second moving claw can partially extend into the first sinking groove.

[0018] In some embodiments, the first fixed jaw can be positioned directly opposite the second portion of the base plate. That is, in the same set of drive units, the second movable jaw faces one of the second portions of the base plate, and the first fixed jaw faces the other second portion of the base plate. Since the distance between the second portion of the base plate and the top plate is relatively large, there is sufficient space for the arrangement of the first and second fixed jaws, which helps to ensure that the spacing between the first and second fixed jaws in the third direction meets the design requirements.

[0019] In some possible implementations, within the same set of drive units, the arrangement direction of the first and second moving jaws is parallel to the optical axis of the lens. The first and second SMA wires are of equal length, and their tilt angles relative to the optical axis of the lens are equal. The arrangement direction of the first and second fixed jaws can also be parallel to the optical axis of the lens, i.e., parallel to a third direction.

[0020] In this embodiment, the first and second moving jaws have identical structures, and their arrangement direction is parallel to a third direction, achieving a symmetrical vertical arrangement. This reduces assembly requirements, facilitates debugging, and results in a high assembly yield for the SMA motor. Similarly, the first and second fixed jaws have identical structures, and their arrangement direction is parallel to a third direction, also achieving a symmetrical vertical arrangement. This reduces assembly requirements, facilitates debugging, and results in a high assembly yield for the SMA motor.

[0021] Among them, the pair of moving jaws and the pair of fixed jaws of the SMA drive assembly can also be arranged symmetrically from left to right, that is, symmetrical with respect to the XZ plane or symmetrical with respect to the YZ plane, so as to further reduce the assembly requirements and debugging difficulty and improve the assembly yield of the SMA motor.

[0022] In some possible implementations, the carrier includes a first side and a fourth side arranged adjacent to each other, with the intersection of the first side and the fourth side forming a first ridge. A pair of movable claws from one set of drive units are fixed to the first side, and a pair of movable claws from another set of drive units are fixed to the fourth side. Within the same set of drive units, the distance between the second movable claw and the first ridge is less than the distance between the first movable claw and the first ridge.

[0023] In this embodiment, the moving and fixed jaws of the SMA drive assembly are arranged asymmetrically vertically. Multiple SMA threads translate in a direction perpendicular to a third direction and away from the outer extension of the base to avoid the outer extension of the base. A gap is always maintained between the multiple SMA threads and the outer extension of the base, thereby ensuring the reliability of the SMA motor operation. In addition, since the space around the first ridge is a reserved space for jaw movement, this space is relatively large. Moving the moving jaw into this space helps to improve the space utilization of the SMA motor.

[0024] The first and second moving jaws are independent structural components, allowing for the separate supply of power to the first and second SMA wires. Alternatively, the first and second moving jaws can be connected to form a single unit, simplifying the structure of the SMA motor and facilitating assembly.

[0025] In this case, the height of the first connecting post and the height of the second connecting post of the carrier are greater than the height of the first main body. This ensures that the height between the first moving claw and the second moving claw (i.e., the claw height) meets the design requirements, and also allows a gap to be formed between the first main body and the second main body of the seat, so that the carrier can move upward relative to the seat in a third direction.

[0026] In some possible implementations, the projections of the two SMA threads onto a reference plane form an intersection point. The reference plane is parallel to the optical axis of the lens and also parallel to the two SMA threads. The projection of the lens's optical axis onto the reference plane covers the intersection point. In this case, the intersection position of the two SMA threads is centrally located, that is, aligned with the lens's optical axis in either the first or second direction.

[0027] In this embodiment, the first moving jaw, the first SMA wire, and the first fixed jaw are symmetrical with respect to the second moving jaw, the second SMA wire, and the first fixed jaw, relative to the XZ plane or the YZ plane. This makes it easier to achieve the driving action of the SMA motor's drive assembly and results in high driving precision. In other embodiments, the intersection of the two SMA wires can also be non-centered, for example, positioned closer to the first or second ridge relative to the optical axis of the lens.

[0028] In some possible implementations, the carrier includes a first body, a first connecting post, and a second connecting post. The first body includes four first corner portions, and the first connecting post and the second connecting post are respectively fixed to two of the diagonally opposite first corner portions. The moving claws of four sets of drive units are fixed to the first connecting post and the second connecting post. The other two diagonally opposite first corner portions are respectively provided with a first notch and a second notch.

[0029] The base includes a second main body, a third connecting post, and a fourth connecting post. The second main body includes four second corner portions. The third and fourth connecting posts are respectively fixed to two of the diagonally opposite second corner portions. The fixed claws of the four sets of drive units are fixed to the third and fourth connecting posts. The other two diagonally opposite second corner portions are respectively provided with a third notch and a fourth notch.

[0030] The second main body is located between the first main body and the base plate. The first connecting column is located at the third notch, the second connecting column is located at the fourth notch, the third connecting column is located at the first notch, and the fourth connecting column is located at the second notch.

[0031] In this application, to ensure the smooth movement of the carrier relative to the base, the shape of the connecting post wall is adapted to the shape of the notch wall. A gap exists between the connecting post wall and the notch wall, allowing the carrier to move relative to the base in the XY plane or tilt in any direction to achieve optical image stabilization. When the carrier moves a certain distance relative to the base in the XY plane or tilts at a certain angle in any direction, the connecting post wall contacts the notch wall, preventing further movement of the carrier and limiting the maximum distance the carrier can move and the maximum angle it can tilt.

[0032] The structure and assembly of the carrier, base, and four drive units are all symmetrical with respect to both the first and second planes to improve the smoothness and reliability of the SMA motor drive. The arrangement directions of the first and second connecting posts and the axial direction of the carrier together define the first plane, while the arrangement directions of the third and fourth connecting posts and the axial direction of the carrier together define the second plane, which is perpendicular to the first plane.

[0033] In some possible implementations, the second body further includes four second sides, which are arranged alternately with four second corners. The base also includes at least one extension portion, which is fixed to the outer surface of the four second sides. In a direction parallel to the optical axis of the lens, the size of the extension portion is larger than the size of the second body, and at least one extension portion has exposed gold fingers. In this embodiment, because the height of the extension portion is relatively large, there is sufficient space to realize the arrangement of gold fingers and other electrical connection structures.

[0034] In some possible implementations, the substrate includes a circuit board and a reinforcing plate. A first portion is fixed to the circuit board, and the reinforcing plate is stacked on the side of the circuit board away from the first portion. A clearance space extends through the circuit board and the reinforcing plate. The reinforcing plate is used to increase the structural strength of the circuit board. Because the clearance space extends through the circuit board and the reinforcing plate, the second portion of the base plate can extend into the substrate to a greater depth, which is beneficial for further reducing the module shoulder height of the camera module.

[0035] In some possible implementations, the substrate includes a circuit board and a reinforcing plate. A first portion is fixed to the circuit board, and the reinforcing plate is stacked on the side of the circuit board away from the first portion. A clearance space extends through the circuit board and exposes a portion of the reinforcing plate. The reinforcing plate is used to increase the structural strength of the circuit board.

[0036] In some possible implementations, the first part is bonded to the circuit board, and the second part is bonded to the reinforcing plate. Since the first part of the SMA's base plate is fixedly connected to the substrate, and the second part is also fixedly connected to the substrate, the connection area between the base plate and the substrate is large, thereby reducing the risk of delamination between the base plate and the substrate and improving the structural reliability of the camera module.

[0037] In some possible implementations, the camera module further includes a filter and a filter holder. The filter holder is fixed to the 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 objects passing through the lens, thereby ensuring that the image captured by the camera module has better clarity.

[0038] In some possible implementations, the base plate further includes a third portion. The third portion is located inside the first portion, the first through-hole is formed in the third portion, the distance between the third portion and the top plate is less than the distance between the first portion and the top plate, and the seat is fixed to the third portion. The filter and filter holder are located between the first through-hole and the substrate and / or between the third portion and the substrate.

[0039] In this embodiment, the photosensitive element's filter and filter holder can be arranged in the accommodating space between the base plate and the substrate, so that the assembly structure of the SMA motor and the photosensitive element is more compact, thereby reducing the height of the camera module in the third direction.

[0040] In some embodiments, the second main body of the base is fixed to the third part of the base plate, and the outer extension of the base can be located between the third part of the base plate and the first side plate, and between the first part of the base plate and the top plate, that is, in the space above the first part of the base plate. In this case, the assembly structure of the base and the base plate can make full use of the space of the base plate and reduce the height of the SMA motor in the third direction.

[0041] In some possible implementations, the filter holder includes an insulating body and a magnetic conductor. The magnetic conductor is embedded in the insulating body, the insulating body is fixed to a substrate, and the magnetic conductor is electrically connected to the substrate. The filter holder can be formed using an insert-molding process. In this embodiment, the filter holder has high structural strength, which helps reduce the risk of filter breakage.

[0042] In a camera module, because the multiple SMA wires of the SMA motor are controlled by PWM (Pulse-width modulation) voltage, the PWM signal is prone to coupling with the image sensor signal, causing interference to the image sensor and posing risks such as image distortion (e.g., stripes) and stuttering. In this embodiment, the filter holder is located on the side of the image sensor closer to the SMA motor. The magnetic component of the filter holder is grounded, and the magnetic component has magnetic conductivity, thereby shielding or reducing the interference of the SMA motor's PWM signal on the image sensor, thus improving the image quality of the camera module.

[0043] In some possible implementations, the insulating body is frame-shaped, the magnetic guide is frame-shaped, and the magnetic guide protrudes from the inner circumferential side of the insulating body, with the filter fixed to the magnetic guide. In this case, the magnetic guide serves to provide a support step for the filter. Compared to the plastic steps used in traditional filter holders, the thickness of the support step in this embodiment can be reduced from approximately 0.18 mm to approximately 0.1 mm, which helps to reduce the back focal length of the lens, thereby reducing the overall height of the camera module.

[0044] In some possible implementations, the camera module may also include a variable aperture with an aperture hole located on the light-receiving side of the lens, the size of which is variable. The variable aperture is used to adjust the amount of light entering the camera, enabling the camera module to maintain constant image quality under various brightness conditions.

[0045] The variable aperture is fixed to the lens, allowing it to move synchronously with the lens and maintain a constant relative position between the aperture opening and the lens, thus ensuring the image quality of the camera module. Alternatively, the variable aperture can be fixed to other components of the camera module, such as the carrier of the SMA motor.

[0046] Secondly, this application also provides an electronic device. The electronic device includes an image processor and a camera module as described above, the image processor being communicatively connected to the camera module. The camera module, while ensuring image quality, has a relatively small module height, resulting in a more comfortable shooting experience for the electronic device and facilitating a thinner design. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0048] Figure 1 This is a schematic diagram of the structure of the electronic device provided in some embodiments of this application;

[0049] Figure 2 yes Figure 1 A partially exploded structural diagram of the electronic device shown.

[0050] Figure 3 yes Figure 2 The diagram shows a structural schematic of a camera module in some embodiments.

[0051] Figure 4 yes Figure 3 A partial exploded view of the camera module shown.

[0052] Figure 5 yes Figure 4The diagram shows the structure of the SMA motor in some embodiments.

[0053] Figure 6 yes Figure 5 The diagram shows the structure of the seat at another angle;

[0054] Figure 7 yes Figure 4 The diagram shows a partial structural schematic of the SMA motor.

[0055] Figure 8 yes Figure 5 The diagram shows the structure of the lower cover at another angle;

[0056] Figure 9 yes Figure 8 The diagram shows the structure of the lower cover at another angle;

[0057] Figure 10 yes Figure 4 The diagram shows a cross-sectional view of the SMA motor cut along point AA.

[0058] Figure 11 yes Figure 4 The diagram shows a cross-sectional view of the SMA motor cut along point BB.

[0059] Figure 12 yes Figure 4 The diagram shows the internal structure of the SMA motor in some other embodiments;

[0060] Figure 13 yes Figure 12 The diagram shows the structure of the SMA drive assembly of the SMA motor.

[0061] Figure 14 yes Figure 13 The diagram shows the structure of the SMA drive component from another angle;

[0062] Figure 15 yes Figure 13 The diagram shows the structure of the four sets of drive units in the SMA drive assembly.

[0063] Figure 16 yes Figure 4 The exploded view of the photosensitive component is shown.

[0064] Figure 17 yes Figure 4 A schematic diagram of the cross-sectional structure of the photosensitive component cut along the CC direction;

[0065] Figure 18 yes Figure 4 A schematic diagram of the photosensitive component shown from another angle;

[0066] Figure 19 yes Figure 3 A schematic diagram of part of the camera module shown from another angle;

[0067] Figure 20 yes Figure 3 The diagram shows the structure of the camera module from another angle;

[0068] Figure 21 yes Figure 3 The diagram shows a cross-sectional view of the camera module cut along point DD.

[0069] Figure 22 yes Figure 21 A schematic diagram of the structure shown from another angle;

[0070] Figure 23 yes Figure 3 A schematic diagram of the cross-sectional structure of the camera module shown, cut along EE.

[0071] Figure 24 yes Figure 2 The diagram shows a structural schematic of the camera module in some other embodiments;

[0072] Figure 25 yes Figure 24 A partial exploded view of the camera module shown.

[0073] Figure 26 yes Figure 25 The exploded view of the photosensitive component is shown.

[0074] Figure 27 yes Figure 25 A schematic diagram of the cross-sectional structure of the photosensitive component cut along the FF line;

[0075] Figure 28 yes Figure 24 The diagram shows a cross-sectional view of the camera module cut along point GG.

[0076] Figure 29 yes Figure 28 The diagram shows the structure from another angle. Detailed Implementation

[0077] The embodiments of this application are described below with reference to the accompanying drawings.

[0078] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. 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 this application, such as "upper," "lower," "inner," "outer," "top," "bottom," "side," "left," and "right," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0079] The term "multiple" refers to at least two. The term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " in this text generally indicates that the preceding and following related objects have an "or" relationship.

[0080] The terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of that feature.

[0081] Furthermore, the limitations on relative positional relationships mentioned in the embodiments of this application, such as parallel, perpendicular, and aligned, are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallelism, perpendicularity, and alignment are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. Similarly, "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0082] This application provides an electronic device, which is a type of electronic device with a shooting function. The electronic device can be a portable electronic device or other suitable electronic device. For example, the electronic device can be a mobile phone, tablet personal computer, laptop computer, personal digital assistant (PDA), camera, personal computer, laptop computer, in-vehicle equipment, wearable device, etc. The wearable device can be augmented reality (AR) glasses, AR headset, virtual reality (VR) glasses, or VR headset, etc.

[0083] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the electronic device 100 provided in some embodiments of this application. Figure 2 yes Figure 1 This is a partially exploded structural diagram of the electronic device 100. In this embodiment, the electronic device 100 is described as a mobile phone. It is understood that... Figure 1 and Figure 2 The electronic device 100 is shown only schematically, and the actual shape, size, location, and construction of these components are not subject to change. Figure 1 and Figure 2 Due to limitations, electronic device 100 may also include, compared to Figure 1 and Figure 2 More or fewer parts.

[0084] In some embodiments, the electronic device 100 may include a screen 10, a back cover 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 light-transmitting cover 101 and a display screen 102. The light-transmitting cover 101 and the display screen 102 are stacked and fixedly connected. The light-transmitting cover 101 mainly serves to protect the display screen 102 and prevent dust. The material of the light-transmitting 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 can 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 (MLED) display screen, a micro organic light-emitting diode (MOLED) display screen, a quantum dot light-emitting diode (QLED) display screen, a liquid crystal display (LCD), etc.

[0085] For example, the back cover 20 is used to protect the internal electronic components of the electronic device 100. The back cover 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 light-transmitting cover plate 101, and is stacked with the light-transmitting cover plate 101 and the display screen 102. The frame 202 is fixed to the back cover 201. For example, the frame 202 can be fixedly connected to the back cover 201 by adhesive. The frame 202 can also be integrally formed with the back cover 201, that is, the frame 202 and the back cover 201 are a single structure. The frame 202 is located between the back cover 201 and the light-transmitting cover plate 101. The light-transmitting cover plate 101 can be fixed to the frame 202 by adhesive. The light-transmitting cover plate 101, the back cover 201, and the frame 202 form an internal receiving space for the electronic device 100. This internal receiving space accommodates the display screen 102.

[0086] For example, camera module 30 is used to take photos / videos. For example, camera module 30 may be located in the internal storage space of electronic device 100. Camera module 30 may be used as a rear camera module or as a front camera module.

[0087] For example, the light-incident surface of the camera module 30 faces the back cover 201. The back cover 201 has 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. This increases the mounting space of the camera module 30 in the thickness direction of the electronic device 100. In other embodiments, the camera decorative cover 40 may be flush with the back cover 201 or recessed into the internal receiving space of the electronic device 100. The camera decorative cover 40 has a light-transmitting window 401. The light-transmitting window 401 allows light from the scene to enter the light-incident surface of the camera module 30. In this embodiment, the camera module 30 is used as a rear camera module 30 of the electronic device 100. For example, the camera module 30 can be used as a rear-mounted main camera module. In other embodiments, the camera module 30 may also be used as a rear-mounted wide-angle camera module or a telephoto camera module.

[0088] In other embodiments, the light-incident surface of the camera module 30 faces the light-transmitting cover plate 101. The display screen 102 has a light-path-avoiding hole. This light-path-avoiding hole allows light from the scene to pass through the light-transmitting cover plate 101 and then enter the light-incident surface of the camera module 30. Thus, the camera module 30 serves as a front-facing camera module 30 for the electronic device 100.

[0089] In some embodiments, such as Figure 2 As shown, the electronic device 100 also includes a circuit board 50 and an image processor 60. The circuit board 50 and image processor 60 are located within the internal storage space of the electronic device 100. The image processor 60 is fixed to 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 acquire image data from the camera module 30 and process the image data. The communication connection between the camera module 30 and the image processor 60 can include data transmission via electrical connections such as wiring, or data transmission via coupling. It is understood that the camera module 30 and the image processor 60 can also achieve communication through other methods capable of data transmission.

[0090] In some embodiments, the electronic device 100 may further include an analog-to-digital converter (also known as an A / D converter, not shown in the figure). 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, whereby the image processor 60 processes the digital image signal and finally displays the image or video on the screen 10.

[0091] In some embodiments, the electronic device 100 may further include a memory (not shown in the figure), which is communicatively connected to the image processor 60. The image processor 60 processes the digital image signal and then transmits 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 it is needed to view the image. 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.

[0092] In other embodiments, the electronic device 100 may also exclude the screen 10 and / or camera cover 40.

[0093] Please see Figure 3 and Figure 4 , Figure 3 yes Figure 2 The diagram shown illustrates the structure of the camera module 30 in some embodiments. Figure 4 yes Figure 3 The diagram shows a partial exploded view of the camera module 30. It is understandable that... Figure 3 and Figure 4 The images only schematically illustrate some of the components included in the camera module 30. The actual shape, size, position, and construction of these components are not subject to change. Figure 3 and Figure 4 Due to limitations, camera module 30 can also include, compared to Figure 3 and Figure 4 More or fewer parts.

[0094] For ease of description later, 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, the third direction Z 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.

[0095] 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.

[0096] Lens 1 is used to image the subject. The optical axis 11 of lens 1 is parallel to the third direction Z of camera module 30. Lens 1 may include a lens barrel 12 and an optical lens group 13. The optical lens group 13 is fixed inside 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 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.

[0097] The lens 1 is fixed to the SMA motor 2. The SMA motor 2 drives the lens 1 to move in a certain direction to achieve automatic focusing (AF) and / or optical image stabilization (OIS). For example, the SMA motor 2 can drive the lens 1 to move in the third direction Z to achieve autofocus. The SMA motor 2 can also drive the lens 1 to move in the XY plane or tilt in any direction to achieve optical image stabilization. The SMA motor 2 can also be used to achieve both autofocus and optical image stabilization, which is not specifically limited here. The SMA motor 2 can be fixed to the photosensitive element 3 by the first adhesive layer 4.

[0098] In some embodiments, the camera module 30 may further include a variable aperture (VA) (not shown in the figure). The variable aperture has an aperture hole located on the light-incident 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 the lens, so that the camera module 30 can maintain constant shooting 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; thereby achieving adjustment of the amount of light entering the lens 1 and ensuring the shooting quality of the camera module 30. In some embodiments, the variable aperture is fixed to the lens 1, so that it can move synchronously with the lens 1, keeping the relative position of the aperture hole and the lens 1 constant, thereby ensuring the shooting quality of the camera module 30. In other embodiments, the variable aperture may also be fixed to other components of the camera module 30, such as the carrier of the SMA motor 2.

[0099] Please see Figure 5 , Figure 5 yes Figure 4 The diagram shows the structure of the SMA motor 2 in some embodiments. Figure 5The illustration schematically shows some of the components included in the SMA motor 2. The actual shape, size, position, and construction of these components are not affected by the actual shape, size, position, and construction of the motor. Figure 5 Due to limitations, the SMA motor 2 can also include, compared to Figure 5 More or fewer parts.

[0100] In some embodiments, the SMA motor 2 includes a carrier 21, a base 22, an SMA drive assembly 23, and a housing 24.

[0101] For example, the carrier 21 has a lens mounting hole 211, which is open at both ends. 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-fit ​​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 adhesive bonding to improve the connection stability and firmness. The forming material of the carrier 21 can be including but not limited to metal and plastic. In some embodiments, the forming material of the carrier 21 is plastic.

[0102] The carrier 21 can 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.

[0103] For example, the carrier 21 may include a first body 212, a first connecting post 213, and a second connecting post 214. The first body 212 may be approximately the shape of 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 body 212. For example, the first body 212 may include four first corner portions and four first sides, which are arranged alternately along the circumference of the carrier 21 and surround the periphery of the lens mounting hole 211. Two of the first sides are arranged opposite each other, and the other two first sides are also arranged opposite each other. Two of the first corner portions are arranged diagonally, and the other two first corner portions are also arranged diagonally. The first connecting post 213 and the second connecting post 214 are respectively fixed to two of the diagonally arranged first corner portions, and the other two diagonally arranged first corner portions are respectively provided with a first notch 215 and a second notch 216.

[0104] The first connecting post 213 may include a first side surface 2131 and a fourth side surface 2132 disposed adjacently, and the intersection of the first side surface 2131 and the fourth side surface 2132 forms a first ridge line 2133. In some embodiments, the first side surface 2131 may be coplanar with one of the outer side surfaces of the first body 212; the fourth side surface 2132 may be coplanar with the other outer side surface of the first body 212. The second connecting post 214 may include a second side surface 2141 and a third side surface 2142, and the intersection of the second side surface 2141 and the third side surface 2142 forms a second ridge line 2143. In some embodiments, the second side surface 2141 may be coplanar with the other outer side surface of the first body 212; the third side surface 2142 may be coplanar with the other outer side surface of the first body 212.

[0105] In the axial direction of the carrier 21, the height of the first connecting post 213 and the height of the second connecting post 214 can be greater than the height of the first body 212. The two ends of the first connecting post 213 and the second connecting post 214 can protrude relative to two surfaces of the first body 212, or one end of the first connecting post 213 and the second connecting post 214 can protrude relative to one surface of the first body 212.

[0106] The first notch 215 and the second notch 216 can be spaces recessed from the outer side of the first body 212 to the interior of the first body 212, and 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 can be stepped or other shapes.

[0107] Please see Figure 5 and Figure 6 , Figure 6 yes Figure 5 The diagram shows the structure of the seat 22 at another angle.

[0108] 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 approximately the shape of a plate with an inner circle and an outer square. An movable hole 225 is formed on the inner side of the second body 221, extending through the second body 221 along the axial direction of the base 22. For example, the second body 221 may include four second corner portions and four second sides, arranged alternately with the four second corner portions along the circumference of the base 22 and surrounding the periphery of the movable hole 225. Two of the second sides are arranged opposite each other, and the other two second sides are also arranged opposite each other. Two of the second corner portions are arranged diagonally, and the other two second corner portions are also arranged diagonally. The third connecting post 222 and the fourth connecting post 223 are respectively fixed to two of the diagonally arranged second corner portions, and the other two diagonally arranged second corner portions are respectively provided with a third notch 226 and a fourth notch 227.

[0109] In the axial direction of the base 22, the heights of the third connecting post 222 and the fourth connecting post 223 are greater than the height of the second main body 221. The third connecting post 222 and the fourth connecting post 223 may protrude relative to the second main body 221 to one side of the second main body 221.

[0110] The third connecting post 222 may include a first fixing surface 2221 and a second fixing surface 2222 disposed adjacently, and the intersection of the first fixing surface 2221 and the second fixing surface 2222 forms a third ridge line 2223. In some embodiments, the first fixing surface 2221 may be coplanar with one of the outer surfaces of the second body 221; the second fixing surface 2222 may be coplanar with the other outer surface of the second body 221. The fourth connecting post 223 may include a third fixing surface 2231 and a fourth fixing surface 2232, and the intersection of the third fixing surface 2231 and the fourth fixing surface 2232 forms a fourth ridge line 2233. In some embodiments, the third fixing surface 2231 may be coplanar with the other outer surface of the second body 221; the fourth fixing surface 2232 may be coplanar with the other outer surface of the second body 221.

[0111] The third notch 226 and the fourth notch 227 can be spaces recessed into the second body 221 from the outer side of the second body 221, and the third notch 226 and the fourth notch 227 penetrate the second body 221 along the axial direction of the seat 22. The walls of the third notch 226 and the fourth notch 227 can be stepped or other shapes.

[0112] The number of extension portions 224 can be one or more; the following embodiment uses four extension portions 224 as an example. The four extension portions 224 are respectively fixed to the outer surfaces of the four second sides. In the axial direction of the base 22, the size of the extension portion 224 is larger than the size of the second body 221. At least one extension portion 224 has exposed gold fingers (not shown in the figure). For example, two oppositely arranged extension portions 224 may both have gold fingers. In other embodiments, the number of extension portions 224 may also be two, and the two extension portions 224 may be arranged opposite each other. Because the extension portions 224 are relatively tall, there is sufficient space to arrange the gold fingers and other electrical connection structures.

[0113] 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 serves to provide an electrical connection structure. The conductive portion may also form the aforementioned gold fingers, and the electrical connection structure connects the aforementioned gold fingers. The insulating portion may be made of insulating materials such as plastic. The conductive portion may be made of metallic materials, such as steel or copper.

[0114] Please see Figure 5 and Figure 7 , Figure 7 yes Figure 4 The diagram shows a partial structural schematic of the SMA motor 2.

[0115] In some embodiments, the carrier 21 and the base 22 are assembled, with the axial direction of the base 22 coinciding with the axial direction of the carrier 21, i.e., 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, with the movable hole 225 of the second body 221 facing and communicating with the lens mounting hole 211 of the first body 212. The four first corners of the first body 212 correspond one-to-one with 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.

[0116] For example, the 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 the SMA drive assembly 23 is also used to drive the carrier 21 and the lens 1 to move together along a 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 in the XY plane or tilt in any direction to achieve optical image stabilization.

[0117] For example, the SMA drive assembly 23 includes four sets of drive units 23a, which are evenly arranged around the circumference of the carrier 21. Each set of drive units 23a includes a pair of movable jaws (231, 232), a pair of fixed jaws (233, 234), and two SMA threads (235, 236). The pair of movable jaws (231, 232) are fixed to the carrier 21, and the pair of fixed jaws (233, 234) are fixed to the base 22. The pair of movable jaws (231, 232) and the pair of fixed jaws (233, 234) are arranged at intervals along the circumference of the carrier 21, and the two SMA threads (235, 236) are cross-connected between the pair of movable jaws (231, 232) and the pair of fixed jaws (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, and the second SMA wire 236 connects the second movable jaw 232 and the second fixed jaw 234. The first SMA wire 235 and the second SMA wire 236 intersect.

[0118] Along the circumference of the carrier 21, a pair of movable claws (231, 232) of two adjacent sets of drive units 23a are arranged adjacently, or a pair of fixed claws (233, 234) of two adjacent sets of drive units 23a are arranged adjacently. For example, the movable claws (231, 232) of four sets of drive units 23a are fixed to the first connecting post 213 and the second connecting post 214. Two sets of movable claws (231, 232) of drive units 23a are fixed to the first connecting post 213, and the other two sets of movable claws (231, 232) of drive units 23a are fixed to the second connecting post 214. Specifically, a pair of movable claws (231, 232) of one set of drive units 23a are fixed to the first side 2131 of the first connecting post 213, a pair of movable claws (231, 232) of another set of drive units 23a are fixed to the fourth side 2132 of the first connecting post 213, a pair of movable claws (231, 232) of another set of drive units 23a are fixed to the second side 2141 of the second connecting post 214, and a pair of movable claws (231, 232) of another set of drive units 23a are fixed to the third side 2142 of the second connecting post 214.

[0119] The fixed jaws (233, 234) of the four sets of drive units 23a are fixed to the third connecting post 222 and the fourth connecting post 223. Two sets of fixed jaws (233, 234) of drive units 23a are fixed to the third connecting post 222, and the other two sets of fixed jaws (233, 234) of drive units 23a are fixed to the fourth connecting post 223. Specifically, a pair of fixed jaws (233, 234) of one set of drive units 23a are fixed to the first fixing surface 2221 of the third connecting post 222, a pair of fixed jaws (233, 234) of another set of drive units 23a are fixed to the second fixing surface 2222 of the third connecting post 222, a pair of fixed jaws (233, 234) of another set of drive units 23a are fixed to the third fixing surface 2231 of the fourth connecting post 223, and a pair of fixed jaws (233, 234) of another set of drive units 23a are fixed to the fourth fixing surface 2232 of the fourth connecting post 223.

[0120] The SMA wires (235, 236) shrink when heated. These SMA wires (235, 236) are made of shape memory alloy (SMA) materials, such as nickel-titanium alloys. Shape memory alloys are a general term for metals with shape memory effects. When ordinary metal materials are subjected to external force, they first undergo elastic deformation. If the external force is removed, the metal will return to its original shape. If the external force continues to increase, when the metal's yield point is reached, plastic deformation will occur. After the external force is removed, permanent deformation remains, and even heating will not restore the shape. Shape memory alloys, however, are alloy materials that can completely eliminate the deformation that occurred at a lower temperature and return to their original shape before deformation when heated. The basic working principle of shape memory alloy materials is to heat the material to above a certain critical temperature for shape memory heat treatment (training), causing it to undergo a certain deformation. After cooling to form a martensitic phase, when it is heated again to above the critical temperature, it transforms from a low-temperature martensitic phase to a high-temperature austenitic phase (i.e., a reverse transformation occurs), thus restoring it to the state it remembered before deformation.

[0121] 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, achieving a reverse phase transformation from low-temperature martensite to high-temperature austenite, restoring the pre-modification memory, thereby causing the SMA wires (235, 236) to shrink. The length change caused by the shrinkage of the SMA wires (235, 236) is essentially due to the transformation of the material's crystal phase structure, i.e., the transformation between martensite and austenite. This attraction between microscopic particles caused by the change in crystal structure (i.e., the change in the spacing between atoms) makes the tension of the macroscopic SMA wires (235, 236) during shrinkage much greater than the electromagnetic force between ordinary magnet coils. Therefore, the shrinkage of the SMA wires (235, 236) can drive heavier loads, i.e., it can achieve large load capacity. Thus, the SMA motor 2 can achieve a large driving force with a relatively small size.

[0122] In this embodiment, since the SMA threads (235, 236) contract when heated by electricity, the resultant force generated by the eight SMA threads (235, 236) on the carrier 21 can be directed in the desired direction by controlling the electrical signals of the eight SMA threads (235, 236), thereby driving the carrier 21 and the lens 1 to move. For example, the eight SMA threads (235, 236) can generate a resultant force along the third direction Z, causing the carrier 21 to drive the lens 1 to move along the third direction Z to achieve focusing. Alternatively, the eight SMA threads (235, 236) can generate a resultant force in the XY plane, causing the carrier 21 to drive the lens 1 to move in the XY plane to achieve optical image stabilization. In this embodiment, the SMA motor 2 has a simple structure, large driving force, and small size, which can achieve both autofocus and optical image stabilization, while also reducing the size of the camera module 30.

[0123] For example, to ensure the stability of the movement of the carrier 21 relative to the seat 22, the shape of the wall surface of the connecting column is adapted to the shape of the wall surface of the notch. For instance, the shape of the wall surface of the first connecting column 213 facing the third notch 226 is adapted to 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 column 214 facing the fourth notch 227 is adapted to 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 column 222 facing the first notch 215 is adapted to 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 column 223 facing the second notch 216 is adapted to the shape of the wall surface of the second notch 216, and is also a stepped surface. There is a gap between the wall surface of the connecting column and the wall surface of the notch, which allows the carrier 21 to move relative to the seat 22 in the XY plane or tilt in any direction to achieve optical image stabilization. When the carrier 21 moves a certain distance relative to the seat 22 in the XY plane or tilts at a certain angle in any direction, the wall of the connecting column contacts the wall of the notch, preventing the carrier 21 from continuing to move, thereby limiting the maximum distance the carrier 21 can move and the maximum angle of tilt.

[0124] For example, the moving claws (231, 232) can be formed of either a conductive or an insulating material. In some embodiments, the moving claws (231, 232) are formed of a conductive material, such as metal. Thus, the moving claws (231, 232) can serve as terminals for the first electrode of the SMA wires (235, 236), facilitating wiring of the SMA wires (235, 236). The first electrode is one of the positive and negative electrodes. The fixed claws (233, 234) can be formed of either a conductive or an insulating material. In some embodiments, the fixed claws (233, 234) are formed of a conductive material, such as metal. Thus, the fixed claws (233, 234) can serve as terminals for the second electrode of the SMA wires (235, 236), facilitating wiring of the SMA wires (235, 236). The second electrode is the other of the positive and negative electrodes.

[0125] In the above embodiments, the first moving jaw 231 and the second moving jaw 232 are independent structural components to facilitate the supply of power to the first SMA wire 235 and the second SMA wire 236, respectively. In other embodiments, the first moving jaw 231 and the second moving jaw 232 can also be connected to form a whole to simplify the structural composition of the SMA motor 2 and facilitate assembly.

[0126] Furthermore, the height of the first connecting post 213 and the height of the second connecting post 214 of the carrier 21 are greater than the height of the first main 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, and also allows a gap to be formed between the first main body 212 and the second main body 221 of the seat 22, enabling the carrier 21 to move relative to the seat 22 in the third direction Z. In other embodiments, the height of the first connecting post 213 and the height of the second connecting post 214 may also be equal to or less than the height of the first main body 212.

[0127] Furthermore, in the aforementioned embodiments, the structure and assembly structure of the carrier 21, the seat 22, and the four sets of drive units 23a can all be symmetrical with respect to the first plane and the second plane, thereby improving the smoothness and reliability of the SMA motor 2 drive. Specifically, the arrangement direction I of the first connecting post 213 and the second connecting post 214, along with the axial direction of the carrier 21, can jointly define the first plane; the arrangement direction II of the third connecting post 222 and the fourth connecting post 223, along with the axial direction of the carrier 21, can jointly define the second plane, which can be perpendicular to the first plane.

[0128] In other embodiments, the carrier 21 and the base 22 may have other structures, and the assembly structure of the driving component with the carrier 21 and the base 22 may also have other implementations. For example, the structure and assembly structure of the carrier 21, the base 22, and the four sets of driving units 23a themselves may be designed as a centrally symmetrical structure centered on the optical axis 11 of the lens 1. In this case, the carrier 21 and the base 22 may be provided with four connecting pillars. The embodiments of this application do not strictly limit the structure and assembly structure of the carrier 21, the base 22, and the four sets of driving units 23a themselves.

[0129] Please refer to it again. Figure 5 The housing 24 can be formed by assembling multiple parts. In some embodiments, the housing 24 includes a lower cover 24a and an upper cover 24b, which are assembled together to cover the carrier 21, the base 22 and the SMA drive assembly 23, thereby providing protection and dust protection.

[0130] Please see Figure 5 , Figure 8 as well as Figure 9 , Figure 8 yes Figure 5 The diagram shows the structure of the lower cover 24a at another angle. Figure 9 yes Figure 8 The diagram shows the structure of the lower cover 24a at another angle.

[0131] In some embodiments, the lower cover 24a may include a base plate 241 and a first side plate 242. The base plate 241 has a first through hole 2411 in its center, and the first side plate 242 is connected to the periphery of the base plate 241. Exemplarily, the base plate 241 may include a first portion 2412 and four second portions 2413. The first portion 2412 is disposed around the first through hole 2411. The first portion 2412 may be a continuous structure; for example, the shape of the first portion 2412 may approximate a frame-shaped plate. The first portion 2412 may include four sides and four corners, which are arranged alternately around the circumference of the lower cover 24a. Two sides are arranged opposite each other, and the other two sides are arranged opposite each other. Two corners are arranged diagonally, and the other corners are also arranged diagonally. The sides may be straight edges, and the corners may be stepped or zigzag-shaped. The four second portions 2413 are arranged at intervals on the outer periphery of the first portion 2412. For example, four second portions 2413 can be respectively disposed on the outer sides of the four corners of the first portion 2412. The second portions 2413 can be L-shaped.

[0132] For example, the base 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 approximate a plate with an inner circle and an outer square. The first portion 2412 may include four sides and four corners, which are arranged alternately in the circumferential direction of the lower cover 24a. Two sides are arranged opposite each other, and the other two sides are arranged opposite each other. Two corners are arranged diagonally, and the other corners are also arranged diagonally.

[0133] In this embodiment, the axial direction of the lower cover 24a is parallel to the third direction Z. Along the third direction Z, the third portion 2414, the first portion 2412, and the second portion 2413 of the base plate 241 sequentially form a step. For example... Figure 8 As shown, on the side near the first side plate 242, the top surfaces of the third part 2414, the first part 2412, and the second part 2413 sequentially form a step, together forming a stepped surface; the top surface of the first part 2412 is lower than the top surface of the third part 2414, and the top surface of the second part 2413 is lower than the top surface of the first part 2412. Figure 9 As shown, on the side away from the first side plate 242, the bottom surfaces of the second part 2413, the first part 2412, and the third part 2414 form a step surface in sequence; the bottom surface of the first part 2412 is lower than the bottom surface of the second part 2413, and the bottom surface of the third part 2414 is lower than the bottom surface of the first part 2412.

[0134] Among them, such as Figure 8 As shown, on the side near the first side plate 242, four second portions 2413 are recessed relative to the first portion 2412, correspondingly forming four first recesses 2415. Figure 9 As shown, on the side away from the first side plate 242, the third portion 2414 is recessed relative to the first portion 2412, correspondingly forming a second recess 2416. The second recess 2416 is arranged around the first through hole 2411.

[0135] The base 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.

[0136] Please refer to it again. Figure 5 In some embodiments, the top 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, and the second side plate 244 is connected to the periphery of the top plate 243. The top plate 243 may be flat.

[0137] Please see Figure 7 , Figure 10 and Figure 11 , Figure 10 yes Figure 4 The diagram shows a cross-sectional view of the SMA motor 2 taken along point AA. Figure 11 yes Figure 4 The diagram shows a cross-sectional view of the SMA motor 2 cut along point BB.

[0138] In some embodiments, the top plate 243 and the bottom plate 241 of the outer casing 24 are arranged opposite each other in the third direction Z. The first through hole 2411 and the second through hole 2431 are directly 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 joined 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, snap-fit, adhesive, 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 specific structure of the outer casing 24 is not strictly limited in the embodiments of this application.

[0139] In this configuration, the distance between the third portion 2414 of the base plate 241 and the top plate 243 is less than the distance between the first portion 2412 of the base plate 241 and the top plate 243. In other words, the third portion 2414 of the base plate 241 sinks relative to the first portion 2412 of the base plate 241 towards the top plate 243, and the second sinking trough 2416 is positioned away from the top plate 243. The distance between the second portion 2413 of the base plate 241 and the top plate 243 is greater than the distance between the first portion 2412 of the base plate 241 and the top plate 243. In other words, the second portion 2413 of the base plate 241 sinks relative to the first portion 2412 of the base plate 241 away from the top plate 243, and the first sinking trough 2415 is positioned towards 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 large height, the first ring 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 ring area extending inward from the first ring area (corresponding to the third part 2414 of the base plate 241) has a small height.

[0140] The carrier 21, the base 22, and the 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 aligned with the lens mounting hole 211 of the carrier 21 and the movable hole 225 of the base 22. The second main body 221 of the base 22 is located between the first main 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 main body 221 of the base 22 is fixed to the third portion 2414 of the bottom plate 241, and 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, in the space above the first portion 2412 of the bottom plate 241. At this time, the assembly structure of the base 22 and the base plate 241 can make full use of the space of the base plate 241 and reduce the height of the SMA motor 2 in the third direction Z. The first connecting post 213 and the second connecting post 214 of the carrier 21, and the third connecting post 222 and the fourth connecting post 223 of the base 22 are respectively arranged close to the four corner areas of the outer shell 24. At this time, the claws of the SMA drive assembly 23 are correspondingly arranged in the four corner areas of the internal space of the outer shell 24.

[0141] Understandably, to meet drive requirements, the SMA motor 2 has lower limit thresholds for the design values ​​of its jaw upper stroke, jaw lower stroke, and jaw height. The local height of the SMA motor 2's housing 24 at the corresponding jaw arrangement position must satisfy the following: the distance between the top plate 243 and the bottom plate 241 must be greater than or equal to the sum of the upper stroke, lower stroke, and jaw height. Specifically, the upper stroke is the distance between the jaw closest to the top plate 243 and the top plate 243 in the third direction Z; the lower stroke is the distance between the jaw 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 in the third direction Z.

[0142] In this embodiment, the base plate 241 of the housing 24 of the SMA motor 2 adopts a step design, so that the four corner areas of the housing 24 have the maximum height to meet the above-mentioned space requirements of the claw, thereby ensuring the driving performance of the SMA motor 2. At the same time, the inward area of ​​the four corners of the housing 24 is highly compressed to reduce the local height of the SMA motor 2.

[0143] In some embodiments, within the same set of drive units 23a, the second movable jaw 232 is located between the first movable jaw 231 and the base plate 241, and the first fixed jaw 233 is located between the second fixed jaw 234 and the base plate 241. In other words, within the same set of drive units 23a, the first movable jaw 231 is positioned near the top plate 243, the second movable jaw 232 is positioned near the base plate 241, the second fixed jaw 234 is positioned near the top plate 243, and the first fixed jaw 233 is positioned near the base plate 241.

[0144] For example, the second movable claw 232 can be positioned directly opposite the second portion 2413 of the base plate 241. That is, when the second movable claw 232 is projected onto the base plate 241 along the third direction Z, the projection falls on the second portion 2413 of the base plate 241. In this embodiment, the distance between the second part 2413 of the base plate 241 and the top plate 243 is greater than the distance between the first part 2412 and the third part 2414 of the base plate 241 and the top plate 243. The second moving claw 232 is positioned directly opposite the second part 2413 of the base plate 241, so that the housing 24 can reduce the distance between the first part 2412 and the third part 2414 of the base plate 241 and the top plate 243 when the distance between the second part 2413 of the base plate 241 and the top plate 243 is greater than or equal to the sum of the upper stroke, lower stroke and claw height of the SMA motor 2, thereby compressing the local height of the SMA motor 2. This facilitates the compact arrangement of the SMA motor 2 with other structures when it is assembled in the camera module 30, thereby reducing the shoulder height of the camera module 30.

[0145] In some embodiments, during the focusing process, when the carrier 21 sinks relative to the seat 22, the second moving claw 232 can partially extend into the first sinking groove 2415.

[0146] In some embodiments, the first fixed jaw 233 can be positioned directly opposite the second portion 2413 of the base plate 241. That is, in the same set of drive units 23a, the second movable jaw 232 is positioned directly opposite one of the second portions 2413 of the base plate 241, and the first fixed jaw 233 is positioned directly opposite the other second portion 2413 of the base plate 241. Since the distance between the second portion 2413 of the base plate 241 and the top plate 243 is relatively large, there is sufficient space for the arrangement of the first fixed jaw 233 and the second fixed jaw 234, which helps to ensure that the spacing between the first fixed jaw 233 and the second fixed jaw 234 in the third direction Z meets the design requirements.

[0147] In some embodiments, such as Figure 11As shown, the arrangement direction of the first movable jaw 231 and the second movable jaw 232 can be 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 tilt angles of the first SMA wire 235 and the second SMA wire 236 relative to the optical axis 11 of the lens 1 are equal. The arrangement direction of the first fixed jaw 233 and the second fixed jaw 234 can also be parallel to the optical axis 11 of the lens 1, that is, parallel to the third direction Z.

[0148] In this embodiment, the first moving jaw 231 and the second moving jaw 232 have the same structure, and their arrangement direction is parallel to the third direction Z, which can achieve a symmetrical arrangement from top to bottom, thereby reducing assembly requirements, facilitating debugging, and resulting in a high 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 symmetrical arrangement from top to bottom, thereby reducing assembly requirements, facilitating debugging, and resulting in a high assembly yield of the SMA motor 2.

[0149] Among them, the pair of moving jaws (231, 232) and the pair of fixed jaws (233, 234) of the SMA drive assembly 23 can also be arranged symmetrically from left to right, that is, symmetrical with respect to the XZ plane or symmetrical with respect 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.

[0150] Understandably, in the camera module 30, once 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 this embodiment, when compressing the local height of the SMA motor 2, that is, when compressing the distance between the first part 2412 and the third part 2414 of the base plate 241 and the top plate 243, it is necessary that the components of the SMA motor 2 that undergo positional changes do not interfere with the multiple SMA wires (235, 236). For example, the seat 22 will move towards the top plate 243 along with the third part 2414 of the base plate 241, and the outer extension 224 of the seat 22 may touch the multiple SMA wires (235, 236). Since the outer extension 224 of the base 22 needs to accommodate gold fingers to ensure electrical connection, its size is difficult to compress. Therefore, in this embodiment, to ensure that a gap is always maintained between the base 22 and the multiple SMA wires (235, 236), the positions of the moving claws (231, 232), the SMA wires (235, 236), and the fixed claws (233, 234) are designed, for example, by translating the SMA wires (235, 236) so that the SMA wires (235, 236) avoid the outer extension 224 of the base 22.

[0151] Please see Figures 12 to 15 , Figure 12 yes Figure 4 The diagram shown is an internal structure diagram of the SMA motor 2 in some other embodiments. Figure 13 yes Figure 12 The diagram shows the structure of the SMA drive assembly 23 of the SMA motor 2. Figure 14 yes Figure 13 The diagram shows the structure of the SMA drive component 23 from another angle. Figure 15 yes Figure 13 The diagram shows the structure of the four drive units 23a of the SMA drive assembly 23. The SMA motor 2 in this embodiment can include most of the technical features of the SMA motor 2 in the above embodiment. The following mainly describes the differences between the two; the parts that are the same will not be repeated.

[0152] 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 ridge line 2133 is less than the distance between the first movable claw 231 and the first ridge line 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 ridge line 2223 is less than the distance between the second fixed claw 234 and the third ridge line 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 ridge line 2143 is less than the distance between the first movable claw 231 and the second ridge line 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 ridge line 2233 is less than the distance between the second fixed claw 234 and the fourth ridge line 2233.

[0153] In this embodiment, the moving jaws (231, 232) and fixed jaws (233, 234) of the SMA drive assembly 23 are arranged asymmetrically vertically. Multiple SMA threads (235, 236) translate in a direction perpendicular to the third direction Z and away from the outer extension 224 of the base 22 to avoid the outer extension 224 of the base 22. A gap is always maintained between the multiple SMA threads (235, 236) and the outer extension 224 of the base 22, thereby ensuring the reliability of the SMA motor 2. Furthermore, since the space around the first ridge 2133 and the second ridge 2143 is a reserved space for jaw movement, and this space is relatively large, moving the moving jaws into this space helps improve the space utilization of the SMA motor 2.

[0154] For example, the four sets of drive units 23a can be symmetrical with respect to the first plane and the second plane to improve the smoothness and reliability of the SMA motor 2 drive. The arrangement direction I of the first connecting post 213 and the second connecting post 214, and the axial direction of the carrier 21, can jointly define the first plane. The arrangement direction II of the third connecting post 222 and the fourth connecting post 223, and the axial direction of the carrier 21, can jointly define the second plane, which can be perpendicular to the first plane.

[0155] For example, the intersection of the two SMA threads (235, 236) is centrally located, 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 threads (235, 236) onto the reference plane form an intersection point. The reference plane is parallel to the optical axis 11 of the lens 1 and parallel to the two SMA threads (235, 236). The projection of the optical axis 11 of the lens 1 onto the reference plane covers the intersection point.

[0156] In this embodiment, the first moving jaw 231, the first SMA wire 235, and the first fixed jaw 233 are symmetrical with respect to the second moving jaw 232, the second SMA wire 236, and the first fixed jaw 233, making the driving action of the SMA motor 2 drive assembly easier to achieve and providing high driving precision. In other embodiments, the intersection position of the two SMA wires (235, 236) may not be centered, for example, it may be positioned relative to the optical axis 11 of the lens 1, closer to the first ridge 2133 or the second ridge 2143.

[0157] Please see Figure 4 , Figure 16 as well as Figure 17 , Figure 16 yes Figure 4 The exploded view of the photosensitive component 3 is shown. Figure 17 yes Figure 4 The diagram shows a cross-sectional view of the photosensitive component 3 taken along the CC direction. It can be understood that... Figure 16 and Figure 17 The schematic diagram illustrates some of the components included in the photosensitive assembly 3. The actual shape, size, position, and construction of these components are not affected by the actual shape, size, position, and construction of the components. Figure 16 and Figure 17 Due to limitations, photosensitive element 3 can also include, compared to Figure 16 and Figure 17 More or fewer parts.

[0158] 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.

[0159] For example, the substrate 31 includes a circuit board 311 and a reinforcing plate 312. The reinforcing plate 312 is laminated and fixed to one side of the circuit board 311, and is used to increase the structural strength of the circuit board 311. The circuit board 311 can be a rigid circuit board, a flexible circuit board, or a rigid-flex circuit board. The circuit board 311 can be an FR-4 dielectric substrate, a Rogers dielectric substrate, or a hybrid dielectric substrate of Rogers and FR-4, etc. The reinforcing plate 312 can be a steel plate or an aluminum plate, etc. In other embodiments, the substrate 31 may not include the reinforcing plate 312.

[0160] The substrate 31 has recessed clearance spaces 313 at its four corners, which can be recessed from the outer side of the substrate 31 towards its interior. The clearance spaces 313 can be through holes or grooves; this embodiment uses a through hole as an example. In this case, the clearance spaces 313 penetrate the circuit board 311 and the reinforcing plate 312 in the thickness direction of the substrate 31. The thickness direction of the substrate 31 is parallel to the third direction Z.

[0161] The substrate 31 may also have a mounting hole 314 in the middle, which penetrates the circuit board 311 and exposes a portion of the reinforcing 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 a photosensitive element. The image sensor 32 is used to collect the 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 can be fixedly connected to the reinforcing plate 312 through a first connecting layer 33. The first connecting layer 33 may be an adhesive layer or the like. In other embodiments, the substrate 31 may not have a mounting hole 314, and the image sensor 32 may be located on the side of the circuit board 311 away from the reinforcing plate 312. The image sensor 32 can be fixedly connected to the circuit board 311 through the first connecting layer 33.

[0162] 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, with the filter holder 34 fixed to the substrate 31 and surrounding 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 or the like. The filter 36 is fixed to the filter holder 34 and faces 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 or the like.

[0163] In some embodiments, the filter holder 34 may include an insulating body 341 and a magnetically conductive element 342, with the magnetically conductive element 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 insulating materials such as plastic. The magnetically conductive element 342 has high magnetic permeability and can also conduct electricity. In some embodiments, the magnetically conductive element 342 may be entirely made of a magnetically conductive material, which may be, but is not limited to, SPCC (steel-plate-cold-common, generally cold-rolled carbon steel sheet and strip), SUS430 (430 stainless steel), or 65Mn (spring steel). In other embodiments, the magnetically conductive element 342 may also have a structure in which a magnetically conductive layer is plated on the surface of a non-magnetically conductive structural component to achieve magnetic conductivity. Non-magnetic structural components can be, for example, stainless steel metal parts, to provide high structural strength. Magnetic layers can be, for example, nickel metal layers, copper metal layers, etc.

[0164] Please see Figure 17 and Figure 18 , Figure 18 yes Figure 4 The diagram shows the structure of the photosensitive component 3 from another angle.

[0165] In some embodiments, the insulating body 341 of the filter holder 34 is fixed to the substrate 31, and the magnetic conductor 342 is electrically connected to the substrate 31 to achieve grounding.

[0166] The magnetic conductive component 342 can be fixed to the substrate 31 by means of solder ball welding, conductive adhesive, surface mount technology (SMT) process, etc.

[0167] For example, the circuit board 311 of the substrate 31 may be provided with pads 3111, which are implemented by copper leakage in a portion of the conductive layer within the circuit board 311. The insulating body 341 of the filter holder 34 is provided with a first groove 3411, which is recessed from the outer side of the insulating body 341 towards the interior of the insulating body 341 and penetrates the insulating body 341 along the thickness direction of the filter holder 34, which is parallel to the third direction Z. A portion of the structure of the magnetic conductor 342 is located in the first groove 3411 and is exposed relative to the insulating body 341. The magnetic conductor 342 may be provided with a second groove 3421, which connects to the first groove 3411. The second groove 3421 is recessed from the outer side of the magnetic conductor 342 towards the interior of the magnetic conductor 342 and penetrates the magnetic conductor 342 along the thickness direction of the filter holder 34. At this time, the portion of the magnetic conductor 342 exposed in the second groove 3421 can be approximately crescent-shaped or semi-frame-shaped. Both the second groove 3421 and the first groove 3411 are positioned directly opposite the pad 3111 on the substrate 31. Solder 315 is applied to the second groove 3421, the first groove 3411, and the pad 3111 to electrically connect the magnetic conductor 342 to the substrate 31, thereby enabling the magnetic conductor 342 to be grounded.

[0168] In this embodiment, the structural design of the second groove 3421 and the first groove 3411 can guide the solder 315 during the welding process, resulting in a stable welding structure and stable solder impedance. It is understood that in other embodiments, the insulating body 341 and the magnetic conductive element 342 of the filter holder 34 can also guide the solder 315 through other structures to ensure welding quality; this embodiment does not strictly limit this. In other embodiments, conductive silver paste or other conductive materials or structures can be used to connect the magnetic conductive element 342 and the substrate 31; this embodiment does not strictly limit this.

[0169] Please refer to it again. Figure 16 and Figure 17 In some embodiments, the insulating body 341 of the filter holder 34 can be frame-shaped, and the magnetic guide 342 can also be frame-shaped, with the magnetic guide 342 protruding from the inner circumferential side of the insulating body 341, and the filter 36 fixed to the magnetic guide 342. In this case, the magnetic guide 342 is used to provide a support step for supporting the filter 36. Compared with the plastic step used in the traditional filter holder 34, the thickness of the support step in this embodiment can be reduced from about 0.18 mm to about 0.1 mm, which is beneficial to reducing the back focal length of the lens 1, thereby reducing the overall height of the camera module 30.

[0170] The filter 36 is 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 dual-pass filter. The dual-pass filter allows visible light and infrared light in the scene light to pass through simultaneously, or allows visible light in the scene light to pass through simultaneously with other light of a specific wavelength (e.g., ultraviolet light), or allows infrared light to pass through simultaneously with other light of a specific wavelength (e.g., ultraviolet light).

[0171] Please see Figures 19 to 22 , Figure 19 yes Figure 3 The diagram shows a partial view of the camera module 30 from another angle. Figure 20 yes Figure 3 The diagram shows the structure of the camera module 30 from another angle. Figure 21 yes Figure 3 The diagram shows a cross-sectional view of the camera module 30 taken along the DD direction. Figure 22 yes Figure 21 The diagram shows the structure from another angle.

[0172] In some embodiments, the first adhesive layer 4 is fixed to the surface of the first portion 2412 of the base plate 241 away from the top plate 243, and the first adhesive layer 4 is also fixed to the substrate 31, so that the first portion 2412 of the base plate 241 is fixed to the substrate 31. The first portion 2412 of the base plate 241 can be fixed to the circuit board 311 of the substrate 31, and a reinforcing plate 312 is 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 the shape of the first portion 2412 of the base plate 241 to increase the connection area between the first portion 2412 of the base plate 241 and the substrate 31, thereby improving the connection strength. The four second portions 2413 of the base plate 241 are at least partially located in the four clearance spaces 313 of the substrate 31.

[0173] 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 part 2413 of the base plate 241 extending into the clearance space 313 of the substrate 31 satisfy: H = H1 + H2 - T. Wherein, the depth T of the second part 2413 of the base plate 241 extending into the clearance space 313 of the substrate 31 refers to the distance in the third direction Z between the surface of the second part 2413 of the base plate 241 that is away from the top plate 243 and the surface of the first part 2412 of the substrate 31 that is close to the base plate 241.

[0174] In this embodiment, the base plate 241 of the SMA motor 2 adopts a stepped structure, which makes the distance between the second part 2413 of the base plate 241 and the top plate 243 larger, so as to ensure the driving performance of the SMA motor 2 and thus ensure the shooting quality of the camera module 30. At the same time, the distance between the first part 2412 of the base plate 241 and the top plate 243 is smaller. The first part 2412 of the base plate 241 is fixed to the substrate 31, and the second part 2413 of the base plate 241 is embedded in the clearance 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 thinness 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.

[0175] In some embodiments, a first distance is formed between the surface of the second portion 2413 of the base plate 241 away from the top plate 243 and the surface of the top plate 243 away from the base plate 241, and a second distance is formed between the surface of the substrate 31 away from the top plate 243 and the surface of the top plate 243 away from the base plate 241. The first distance is slightly smaller than the second distance, so as to allow for assembly tolerance of the SMA motor 2 and the photosensitive component 3 in the third direction Z while reducing the shoulder height of the camera module 30, thereby improving the assembly accuracy of the camera module 30. In other embodiments, the surface of the second portion 2413 of the base plate 241 away from the top plate 243 may also be flush with the surface of the substrate 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 part 2413 of the base plate 241 extending into the clearance 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 about 0.4 mm to 0.6 mm compared to conventional solutions, for example, by about 0.5 mm.

[0176] In some embodiments, the distance between the second part 2413 of the base plate 241 of the SMA motor 2 and the top plate 243 can be approximately the height of the 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.

[0177] Please see Figure 23 , Figure 23 yes Figure 3 The diagram shows a cross-sectional view of the camera module 30 cut along EE.

[0178] In some embodiments, the lens 1 is mounted in the lens mounting hole 211 of the carrier 21 to fix it to the carrier 21. The lens 1 can be partially accommodated within the movable hole 225 of the base 22 to facilitate reducing 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 middle of the substrate 31 and electrically connected to the substrate 31, and the image sensor 32 is positioned facing the lens 1.

[0179] The third portion 2414 of the base plate 241 is closer to the top plate 243 than the first portion 2412 of the base plate 241, so that a receiving space 245 is formed between the third portion 2414 of the base plate 241 and the substrate 31. The height of the receiving space 245 is the height of the second recess 2416 (e.g., Figure 19 The height of the camera module 30 is the sum of the height of the first adhesive layer 4 and the thickness of the first adhesive layer 4. In this embodiment, part of the structure of the photosensitive component 3 can be arranged in the accommodating space 245 to make the assembly structure of the SMA motor 2 and the photosensitive component 3 more compact, thereby reducing the height of the camera module 30 in the third direction Z.

[0180] For example, the filter holder 34 is fixed to the 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 is 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 base plate 241 and the substrate 31.

[0181] In the camera module 30, since the multiple SMA wires (235, 236) of the SMA motor 2 are controlled by PWM (Pulse-width modulation) voltage, the PWM signal is prone to coupling with the signal of the image sensor 32, causing interference to the image sensor 32 and posing risks such as image distortion (e.g., stripes) and stuttering. In this embodiment, the filter holder 34 is located on the side of the image sensor 32 closer to the SMA motor 2. The magnetic component 342 of the filter holder 34 is grounded and has magnetic permeability, thereby shielding or reducing the interference of the PWM signal of the SMA motor 2 on the image sensor 32, thus improving the imaging quality of the camera module 30.

[0182] Please see Figure 24 and Figure 25 , Figure 24 yes Figure 2 The diagram shows the structure of the camera module 30 in some other embodiments. Figure 25 yes Figure 24The diagram shows a partially exploded view of the camera module 30. The camera module 30 of this embodiment may include most of the technical features of the camera module 30 of the embodiments described above. The following mainly describes the differences between the two, and the majority of the content that is the same will not be repeated. It is understood that... Figure 24 and Figure 25 The images only schematically illustrate some of the components included in the camera module 30. The actual shape, size, position, and construction of these components are not subject to change. Figure 24 and Figure 25 Due to limitations, camera module 30 can also include, compared to Figure 24 and Figure 25 More or fewer parts.

[0183] In some embodiments, the camera module 30 includes a lens 1, an SMA motor 2, a photosensitive element 3, a first adhesive layer 4, and a second adhesive layer 5. The lens 1 is fixed to the SMA motor 2, which drives the lens 1 to move along a certain path to achieve autofocus and / or optical image stabilization. The SMA motor 2 can be fixed to the photosensitive element 3 via the first adhesive layer 4 and the second adhesive layer 5.

[0184] Please see Figure 26 and Figure 27 , Figure 26 yes Figure 25 The exploded view of the photosensitive component 3 is shown. Figure 27 yes Figure 25 The diagram shows a cross-sectional view of the photosensitive component 3 taken along the FF line. It can be understood that... Figure 26 and Figure 27 The schematic diagram illustrates some of the components included in the photosensitive assembly 3. The actual shape, size, position, and construction of these components are not affected by the actual shape, size, position, and construction of the components. Figure 26 and Figure 27 Due to limitations, photosensitive element 3 can also include, compared to Figure 26 and Figure 27 More or fewer parts.

[0185] 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.

[0186] For example, the substrate 31 includes a circuit board 311 and a reinforcing plate 312. The reinforcing plate 312 is laminated and fixed to one side of the circuit board 311, and is used to increase the structural strength of the circuit board 311. The circuit board 311 can be a rigid circuit board, a flexible circuit board, or a rigid-flex circuit board. The circuit board 311 can be an FR-4 dielectric board, a Rogers dielectric board, or a hybrid dielectric board of Rogers and FR-4, etc. The reinforcing plate 312 can be a steel plate or an aluminum plate, etc.

[0187] The substrate 31 has recessed clearance spaces 313 at its four corners. These clearance spaces 313 can be recessed from the outer side of the substrate 31 towards its interior. The clearance spaces 313 can be grooves. In this case, the clearance spaces 313 penetrate the circuit board 311 in the thickness direction of the substrate 31 and expose a portion of the reinforcing plate 312. The thickness direction of the substrate 31 is parallel to the third direction Z.

[0188] The substrate 31 may also have a mounting hole 314 in its center, which penetrates the circuit board 311 and exposes a portion of the reinforcing plate 312. The image sensor 32 may be at least partially located in the mounting hole 314, and the image sensor 32 may be fixedly connected to the reinforcing plate 312 via a first connecting layer 33. The first connecting layer 33 may be an adhesive layer or the like. In other embodiments, the substrate 31 may not have a mounting hole 314, and the image sensor 32 may be located on the side of the circuit board 311 away from the reinforcing plate 312, with the image sensor 32 fixedly connected to the circuit board 311 via the first connecting layer 33.

[0189] 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, with the filter holder 34 fixed to the substrate 31 and surrounding 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 or the like. The filter 36 is fixed to the filter holder 34 and faces 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 or the like.

[0190] Please see Figure 28 and Figure 29 , Figure 28 yes Figure 24 The diagram shows a cross-sectional view of the camera module 30 cut along point GG. Figure 29 yes Figure 28 The diagram shows the structure from another angle.

[0191] In some embodiments, the first portion 2412 of the base 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 the side of the circuit board 311 away from the first portion 2412 of the base plate 241. The second portion 2413 of the base plate 241 of the SMA motor 2 is fixed to the reinforcing plate 312 of the substrate 31. Exemplarily, the first portion 2412 of the base plate 241 can be bonded to the circuit board 311 of the substrate 31 by a first adhesive layer 4, and the second portion 2413 of the base plate 241 can be bonded to the reinforcing plate 312 of the substrate 31 by a second adhesive layer 5. The number of second adhesive layers 5 is set to four.

[0192] 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 part 2413 of the base plate 241 extending into the clearance space 313 of the substrate 31 satisfy: H = H1 + H2 - T. Wherein, the depth T of the second part 2413 of the base plate 241 extending into the clearance space 313 of the substrate 31 refers to the distance in the third direction Z between the surface of the second part 2413 of the base plate 241 that is away from the top plate 243 and the surface of the first part 2412 of the substrate 31 that is close to the base plate 241.

[0193] In this embodiment, the base plate 241 of the SMA motor 2 adopts a stepped structure, which makes the distance between the second part 2413 of the base plate 241 and the top plate 243 larger, so as to ensure the driving performance of the SMA motor 2 and thus ensure the shooting quality of the camera module 30. At the same time, the distance between the first part 2412 of the base plate 241 and the top plate 243 is smaller. The first part 2412 of the base plate 241 is fixed to the substrate 31, and the second part 2413 of the base plate 241 is embedded in the clearance 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 thinness 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.

[0194] In addition, since the first part 2412 of the base plate 241 of the SMA 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 large, thereby reducing the risk of delamination between the base plate 241 and the substrate 31 and improving the structural reliability of the camera module 30.

[0195] In some embodiments, the depth T of the second portion 2413 of the base plate 241 extending into the clearance 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 about 0.2 mm to 0.4 mm compared to conventional solutions, such as about 0.25 mm to 0.3 mm.

[0196] In other embodiments, the second portion 2413 of the base plate 241 may not be bonded to the reinforcing plate 312, and the camera module 30 may not have the second adhesive layer 5, so that the depth T of the second portion 2413 of the base plate 241 extending into the clearance space 313 of the substrate 31 is larger, so as to further reduce the shoulder height of the camera module 30.

[0197] 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 protection scope of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0198] It should be noted that all the above figures are exemplary illustrations of this application and do not represent the actual size of the product. Furthermore, the dimensional proportions between the components in the figures are not intended to limit the actual product of this application.

[0199] The above are merely some embodiments and implementation methods of this application. The scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A camera module (30), characterized in that, Includes a lens (1) and an SMA motor (2). The SMA motor (2) includes a carrier (21), a base (22), and an SMA drive assembly (23). The lens (1) is fixed to the carrier (21). The 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. The SMA motor (2) also includes a top plate (243) and a bottom plate (241) disposed opposite to each other. The carrier (21), the seat (22) and the SMA drive 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) includes a first part (2412) and four second parts (2413). The first part (2412) is disposed around the first through hole (2411). The four second parts (2413) are arranged at intervals on the outer periphery of the first part (2412). The distance between the second part (2413) and the top plate (243) is greater than the distance between the first part (2412) and the top plate (243). The camera module (30) also includes a substrate (31) and an image sensor (32). The substrate (31) has recessed clearance spaces (313) at its four corners. The first part (2412) is fixed to the substrate (31) by a first adhesive layer (4). The second part (2413) is at least partially located in the clearance space (313). The image sensor (32) is fixed to the middle of the substrate (31) and electrically connected to the substrate (31). The image sensor (32) is positioned facing the lens (1).

2. The camera module (30) according to claim 1, characterized in that, The SMA drive assembly (23) includes four sets of drive units (23a), which are evenly arranged around the carrier (21) in the circumferential direction. Each drive unit (23a) includes a pair of moving jaws (231, 232), a pair of fixed jaws (233, 234), and two SMA wires (235, 236). The pair of movable jaws (231, 232) are fixed to the carrier (21), and the pair of fixed jaws (233, 234) are fixed to the base (22). The pair of movable jaws (231, 232) and the pair of fixed jaws (233, 234) are arranged at intervals along the circumference of the carrier (21). The two SMA threads (235, 236) are cross-connected between the pair of movable jaws (231, 232) and the pair of fixed jaws (233, 234). Along the circumference of the carrier (21), a pair of moving claws (231, 232) of two adjacent sets of the drive units (23a) are arranged adjacently, or a pair of fixed claws (233, 234) of two adjacent sets of the drive units (23a) are arranged adjacently.

3. The camera module (30) according to claim 2, characterized in that, The pair of movable jaws (231, 232) includes a first movable jaw (231) and a second movable jaw (232). The second movable jaw (232) is located between the first movable jaw (231) and the base plate (241), and the second movable jaw (232) is positioned directly opposite the second part (2413).

4. The camera module (30) according to claim 3, characterized in that, In the same set of drive units (23a), the first moving claw (231) and the second moving claw (232) are arranged in a direction 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) includes a first side (2131) and a fourth side (2132) arranged adjacent to each other. The intersection of the first side (2131) and the fourth side (2132) forms a first ridge (2133). A pair of movable claws (231, 232) of one set of driving units (23a) are fixed to the first side (2131), and a pair of movable claws (231, 232) of another set of driving units (23a) are fixed to the fourth side (2132). In the same group of drive units (23a), the distance between the second moving claw (232) and the first ridge line (2133) is less than the distance between the first moving 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 threads (235, 236) onto the reference plane form an intersection point. The reference plane is parallel to the optical axis (11) of the lens (1) and parallel to the two SMA threads (235, 236). The projection of the optical axis (11) of the lens (1) onto the reference plane covers the intersection point.

7. The camera module (30) according to any one of claims 2 to 6, characterized in that, The carrier (21) includes a first body (212), a first connecting post (213) and a second connecting post (214). The first body (212) includes four first corners. The first connecting post (213) and the second connecting post (214) are respectively fixed to two of the first corners that are diagonally opposite. The moving claws of the four sets of drive units (23a) are fixed to the first connecting post (213) and the second connecting post (214). The other two first corners that are diagonally opposite are respectively provided with a first notch (215) and a second notch (216). The base (22) includes a second main body (221), a third connecting post (222), and a fourth connecting post (223). The second main body (221) includes four second corner portions. The third connecting post (222) and the fourth connecting post (223) are respectively fixed to two of the diagonally opposite second corner portions. The fixed claws of the four sets of drive units (23a) are fixed to the third connecting post (222) and the fourth connecting post (223). The other two diagonally opposite second corner portions are respectively provided with a third notch (226) and a fourth notch (227). The second main body (221) is located between the first main body (212) and the base plate (241). The first connecting post (213) is partially located in the third gap (226), the second connecting post (214) is partially located in the fourth gap (227), the third connecting post (222) is partially located in the first gap (215), and the fourth connecting post (223) is partially located in the second gap (216).

8. The camera module (30) according to claim 7, characterized in that, The second body (221) also includes four second sides, which are arranged alternately with the four second corners. The base (22) also includes at least one extension (224), which is fixed to the outer surface of the four second sides. In a direction parallel to the optical axis (11) of the lens (1), the size of the extension portion (224) is larger than the size of the second body (221), and at least one of the extension portions (224) is provided with exposed gold fingers.

9. The camera module (30) according to any one of claims 1 to 6 and 8, characterized in that, The substrate (31) includes a circuit board (311) and a reinforcing plate (312). The first part (2412) is fixed to the circuit board (311). The reinforcing plate (312) is stacked on the side of the circuit board (311) away from the first part (2412). The clearance space (313) passes through the circuit board (311) and the reinforcing plate (312).

10. The camera module (30) according to any one of claims 1 to 6 and 8, characterized in that, The substrate (31) includes a circuit board (311) and a reinforcing plate (312). The first part (2412) is fixed to the circuit board (311). The reinforcing plate (312) is stacked on the side of the circuit board (311) away from the first part (2412). The clearance space (313) penetrates the circuit board (311) and exposes part of the reinforcing plate (312).

11. The camera module (30) according to any one of claims 1 to 6 and 8, characterized in that, The camera module (30) also includes a filter (36) and a filter bracket (34). The filter bracket (34) is fixed to the side of the substrate (31) near 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 bracket (34).

12. The camera module (30) according to claim 11, characterized in that, The base plate (241) further includes a third part (2414), which is located inside the first part (2412). The first through hole (2411) is formed in the third part (2414). The distance between the third part (2414) and the top plate (243) is less than the distance between the first part (2412) and the top plate (243). The seat (22) is fixed to the third part (2414). 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 part (2414) and the substrate (31).

13. The camera module (30) according to claim 11, characterized in that, The filter holder (34) includes an insulating body (341) and a magnetic conductor (342). The magnetic conductor (342) is embedded in the insulating body (341), the insulating body (341) is fixed to the substrate (31), and the magnetic conductor (342) is electrically connected to the substrate (31).

14. The camera module (30) according to claim 12, characterized in that, The filter holder (34) includes an insulating body (341) and a magnetic conductor (342). The magnetic conductor (342) is embedded in the insulating body (341), the insulating body (341) is fixed to the substrate (31), and the magnetic conductor (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 element (342) is frame-shaped, the magnetic conductive element (342) protrudes from the inner circumferential side of the insulating body (341), and the filter (36) is fixed to the magnetic conductive element (342).

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

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