Camera module

Abstract

The invention discloses an onboard electromagnetic driver and a camera module, relates to the technical field of camera modules, and solves the problem that the size of the camera module is large due to the adoption of a voice coil motor. The onboard electromagnetic driver comprises a flexible component and a carrier plate, the flexible component comprises a carrying part and an elastic part, the carrier plate is fixedly connected with the carrying part, and the carrier plate is provided with a coil assembly. The coil assembly is directly arranged on the carrier plate, the integrated design of the coil assembly and the carrier plate is achieved, the flexible component is provided with the carrying part and the elastic part, and the carrying part can drive the coil assembly on the carrier plate to move in the up-down, left-right and front-back space ranges; and the moved coil assembly can be reset under the action of the elastic force of the elastic part, so that the flexible component has the functions of carrying, moving and resetting, and compared with a voice coil motor, parts configured for realizing related functions are reduced, thereby reducing the shoulder height size and volume of the camera module.

Description

Technical Field

[0001] The present invention relates to the technical field of camera modules, and more specifically, to an on-board electromagnetic driver and a camera module. Background Art

[0002] In related technologies, a voice coil motor moves in a magnetic field through a magnetic thrust generated by a current-carrying coil to achieve the autofocus function of a camera module. However, as a separate and complete voice coil motor, it has a complex structure and a large variety of components, resulting in a problem of a relatively large volume of the voice coil motor. A camera module using a voice coil motor as a driver will inevitably lead to a relatively large volume of the camera module, which cannot meet the market demand for the thin and light of terminal devices. Summary of the Invention

[0003] In view of this, an object of the present invention is to overcome the deficiencies of the prior art. In a first aspect, an on-board electromagnetic driver is provided to solve the technical problem that the structure and volume of a camera module are relatively large due to the use of a voice coil motor.

[0004] The technical solution adopted by the present invention to solve this technical problem is as follows:

[0005] A camera module includes:

[0006] A camera assembly, including a lens barrel and a plurality of lenses defining an optical axis;

[0007] A flexible member, the flexible member including a carrying portion, a frame portion, and an elastic portion connecting the carrying portion and the frame portion;

[0008] A carrier board, the carrier board being connected to the carrying portion and located on a side of the carrying portion facing the camera assembly;

[0009] A coil assembly, the coil assembly being disposed on the carrier board, the coil assembly including a first bracket and at least two coil bodies, the at least two coil bodies being respectively located on opposite sides of the first bracket;

[0010] A filter, the filter being disposed at a central hollow position of the first bracket;

[0011] An image sensor chip, the image sensor chip being disposed on the carrier board;

[0012] A magnetic assembly, the magnetic assembly including a second bracket and a magnetic member located within the second bracket, the magnetic member being correspondingly disposed with the coil body. Wherein, after the coil assembly is energized, a magnetic thrust is generated to drive the carrier board to move, and the carrier board drives the image sensor chip to move along a direction parallel to the optical axis.

[0013] Optionally, four elastic parts are arranged between the mounting part and the frame part, and the four elastic parts are respectively arranged outside the four corners of the mounting part; each elastic part includes a contact part connected to the mounting part and a contact part connected to the frame part. The contact parts connected to the mounting part are distributed on the outer edges opposite to each other in the first direction of the mounting part, and the contact parts connected to the frame part are distributed on the inner edges opposite to each other in the second direction of the frame part, and the second direction is perpendicular to the first direction.

[0014] Optionally, a plurality of elastic parts are arranged between the mounting part and the frame part, and the projection of the plurality of elastic parts on a plane perpendicular to the optical axis is an axisymmetric figure. The axisymmetric figure has two axes of symmetry along the first direction and the second direction, and the two axes of symmetry are perpendicular to each other.

[0015] Optionally, the camera module further includes an elastic member connecting the second bracket and the first bracket.

[0016] Optionally, the elastic member includes two separately arranged elastic sheets, and the two elastic sheets are respectively arranged corresponding to the opposite sides of the first bracket.

[0017] Optionally, the number of the magnetic members is at least two, and they are respectively arranged in one-to-one correspondence with the at least two coil bodies.

[0018] Optionally, the coil and the corresponding magnetic member are arranged opposite to each other in a direction perpendicular to the optical axis.

[0019] Optionally, a sinking groove structure capable of providing lifting of the mounting part is formed in the middle area of the base.

[0020] Optionally, each coil body is wound around two winding posts, and the two winding posts are spaced apart on the outer wall of one side of the first bracket.

[0021] Optionally, the coil body is etched on the surface of the carrier plate, and a convex platform is arranged on the surface of the carrier plate, and the coil body is arranged on the convex platform.

[0022] Compared with the prior art, the beneficial effects of the on-board electromagnetic driver provided by the present invention are:

[0023] In the present invention, the coil assembly is directly disposed on the carrier board, realizing an integrated design of the coil assembly and the carrier board. The flexible component has two parts, namely a mounting part and an elastic part, enabling the mounting part to drive the coil assembly on the carrier board to move within the spatial range of up and down, left and right, and front and back. Moreover, the moved coil assembly can be reset under the action of the elastic force of the elastic part, making full use of the flexible characteristics of the flexible component, so that the flexible component has the functions of mounting, moving, and resetting. Compared with the voice coil motor, the components configured to achieve related functions are reduced, thereby reducing the shoulder height dimension and volume of the camera module and meeting the requirements for miniaturization of the camera module. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 is an exploded structural schematic diagram of a camera module of the present invention;

[0026] Figure 2 is Figure 1 a side cross-sectional structural schematic diagram of the camera module in

[0027] Figure 3 is Figure 1 a side cross-sectional structural schematic diagram of the other side of the camera module in

[0028] Figure 4 is Figure 1 a three-dimensional structural schematic diagram of a flexible circuit board in

[0029] Figure 5 is Figure 1 another three-dimensional structural schematic diagram of the flexible circuit board in

[0030] Figure 6 is Figure 1 yet another three-dimensional structural schematic diagram of the flexible circuit board in

[0031] Figure 7 is Figure 1 still another three-dimensional structural schematic diagram of the flexible circuit board in

[0032] Figure 8 is another exploded structural schematic diagram of the camera module of the present invention;

[0033] Figure 9 is Figure 8 a side cross-sectional structural schematic diagram of the camera module in

[0034] Figure 10 is Figure 9 A three-dimensional structural schematic diagram of the relative position between the magnetic component and the coil body in the middle;

[0035] Figure 11 It is another structural schematic diagram of the relative position between the magnetic component and the coil body of the present invention.

[0036] In the figure:

[0037] 10 - Camera module; 21 - Second bracket; 22 - Magnetic component; 23 - Position magnetic component; 30 - Elastic sheet; 40 - Filter; 51 - First bracket; 52 - Coil body; 53 - Winding post; 60 - Photosensitive chip; 71 - Carrier board; 72 - Position sensor; 80 - Flexible circuit board; 81 - Mounting part; 82 - Bending part; 83 - Frame part; 831 - First contact part; 832 - First bending part; 841 - Second contact part; 842 - Inner frame part; 843 - Third contact part; 851 - Fourth contact part; 852 - Second bending part; 90 - Base. Specific embodiments

[0038] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts shall fall within the scope protected by the present invention.

[0039] Embodiment:

[0040] The present invention provides a board-mounted electromagnetic driver, which is applied to a camera module. The camera module includes a photosensitive chip 60. As Figures 1 to 3 shown, the camera module includes a camera component 10. The camera component 10 generally includes a lens barrel, a plurality of lenses, a spacer ring and other components stacked together. The camera module obtains an image signal through the camera component 10, and the image signal is projected onto the photosensitive chip 60 and converted into an electrical signal and sent to the processor.

[0041] As Figures 1 to 3As shown, the camera assembly 10 is connected with a magnetic assembly, and the magnetic assembly includes a second bracket 21 and a magnetic member 22. The second bracket 21 is generally in a semi-box structure with an open top and an open bottom. The camera assembly 10 is connected to the outer side of the top of the second bracket 21, and the connection methods include but are not limited to pasting, screw connection, snap connection or integral molding, etc. Among them, the image signal obtained by the camera assembly 10 is transmitted through the open top. Of course, the second bracket 21 can also be designed into various structural forms such as a cylindrical shape, a box shape or a frame, etc., and the specific structure of the second bracket 21 is not limited in this embodiment. In addition, after the second bracket 21 is fixedly connected to the camera assembly 10, the generated driving force can be controlled below the camera assembly 10, so that the camera assembly 10 can also realize the function of automatic focusing without moving.

[0042] As Figures 1 to 3 shown, the magnetic member 22 is fixed on the inner side wall of the semi-box structure of the second bracket 21 and is used to cooperate with the coil assembly to generate a magnetic thrust. Among them, a receiving groove can be provided on the inner side wall of the second bracket 21, and the structure of the receiving groove corresponds to that of the magnetic member 22, that is, the magnetic member 22 can be correspondingly placed in the receiving groove and fixedly connected to the inner side wall of the second bracket 21. The magnetic member 22 can be a magnet, or any one of a magnet, a magnetized body or a conductive coil. The number of the magnetic members 22 can be one or more. In this embodiment, it is preferably two. The positions of the two magnetic members 22 are arranged oppositely, and the connection methods between the magnetic member 22 and the second bracket 21 include but are not limited to pasting, welding or screw connection, etc.

[0043] In this embodiment, a position magnetic member 23 is further connected to the inner side wall of the second bracket 21 and is used to cooperate with the position sensor 72 to detect the relative position between the position magnetic member 23 and the position sensor 72. Among them, the materials of the position magnetic member 23 and the magnetic member 22 can be the same or different, and the connection methods between the position magnetic member 23 and the second bracket 21 include but are not limited to pasting, welding or screw connection, etc.

[0044] As Figures 1 to 3 shown, the bottom of the second bracket 21 is connected with a base 90. The four corners of the base 90 have columns matching the four corners of the semi-box-shaped second bracket 21, so that the base 90 can be positioned and connected with the second bracket 21 through the columns to form an overall housing structure. The inside of the base 90 sinks to provide sufficient movement space for the driving assembly. The connection methods between the second bracket 21 and the base 90 include but are not limited to pasting, screw connection or snap connection. Of course, according to the actual structural shape of the second bracket 21, the base 90 can also be designed into structural shapes such as a circular shape, an annular shape or a polygon.

[0045] As Figures 1 to 3As shown, the second bracket 21 is connected to the base 90 to form a housing structure, and the flexible member is at least partially disposed inside the housing structure to drive the photosensitive chip 60 to move. In some embodiments, the flexible member may be a flexible circuit board 80, and the flexible circuit board 80 includes a mounting portion 81 and an elastic portion. The mounting portion 81 is used to mount the photosensitive chip 60 disposed opposite to the camera module 10. The flexible circuit board 80 is at least partially fixed inside the housing structure, and the photosensitive chip 60 can move inside the housing structure.

[0046] It can be understood that the flexible member may also be made of other elastic materials such as silicone and rubber, and the photosensitive chip 60 can be separately externally connected to a circuit board. However, in this embodiment, the flexible circuit board 80 is directly selected as the flexible member, which can not only play the role of mounting the photosensitive chip 60 to move along the optical axis direction of the camera module 10, but also play the role of conducting electricity and data transmission for the photosensitive chip 60. Using the flexible circuit board 80 can achieve functional integration, which is beneficial to reducing the setting of other components, thereby reducing the volume of the entire camera module. In addition, the versatility of the flexible circuit board 80 is beneficial to reducing related components, thereby reducing costs.

[0047] As Figure 4 shown, as an embodiment, one end of the flexible circuit board 80 is bent and formed, and the bent end becomes the mounting portion 81, and the bent connection portion 82 becomes the elastic portion, that is, the mounting portion 81 can move or reset in the elastic direction of the bent connection portion 82 along the optical axis direction of the camera module 10. Among them, the number of times the flexible circuit board 80 is bent can be one or more times.

[0048] According to the actual wiring of the flexible circuit board 80, the flexible circuit board 80 can be bent once to form a U-shaped structure; or the flexible circuit board 80 can be bent twice to form a Z-shaped or C-shaped structure; or it can be bent more times to form more structural shapes. At the same time, according to the specific shape of the housing structure, the specific bending shape of the flexible circuit board 80 can be selected. For example, the bent mounting portion 81 is parallel to the unbent flexible circuit board 80; or the bent mounting portion 81 and the unbent flexible circuit board 80 are on the same side or different sides of the bent connection portion 82.

[0049] As Figure 5As shown in the figure, as another embodiment, the flexible circuit board 80 is provided with a hollowed-out portion. The middle region after hollowing out becomes the mounting portion 81, the edge portion after hollowing out becomes the frame portion 83, and the remaining portion after hollowing out becomes the elastic portion. The elastic portion includes a first contact portion 831 and a first bending portion 832. The first bending portion 832 has an L-shaped bent plate structure. The two ends of the first bending portion 832 are respectively connected to two first contact portions 831. The two first contact portions 831 are respectively connected to the mounting portion 81 and the frame portion 83, so that the entire flexible circuit board 80 is electrically connected. Along the circumferential direction of the mounting portion 81, one or more first bending portions 832 can be provided between the mounting portion 81 and the frame portion 83. In this embodiment, four equally divided first bending portions 832 are designed along the circumferential direction of the mounting portion 81. Multiple groups of traces can be arranged on each group of the first contact portion 831 and the first bending portion 832. The widths of the first contact portion 831 and the first bending portion 832 can also be set according to the needs of the traces. Among them, the widths of the first contact portion 831 and the first bending portion 832 can be the same or different. Of course, the shape of the first bending portion 832 is not limited to the L shape, and the first bending portion 832 can also be designed into a bow shape, an arc shape or a wave shape and other structural forms.

[0050] It can be understood that, due to the connection between the mounting portion 81 and the frame portion 83 through the first contact portion 831 and the first bending portion 832, the mounting portion 81 can elastically move up and down relative to the frame portion 83, so that the photosensitive chip 60 can move or reset along the optical axis direction of the camera module 10. That is, the elastic portion not only plays an elastic movement role for the photosensitive chip 60, but also plays a role of conducting electricity and transmitting signals between the mounting portion 81 and the frame portion 83. Optionally, the mounting portion 81, the first contact portion 831, the first bending portion 832 and the frame portion 83 can be integrally formed by etching to reduce the production and manufacturing difficulty of the components.

[0051] Such as Figure 6As shown, as yet another embodiment, the flexible circuit board 80 is also provided with a hollowed-out portion. The difference is that the elastic portion includes a second contact portion 841, an inner frame portion 842, and a third contact portion 843. The inner frame portion 842 is disposed between the mounting portion 81 and the frame portion 83. The mounting portion 81 and the inner frame portion 842 are connected through the third contact portion 843, and the inner frame portion 842 and the frame portion 83 are connected through the second contact portion 841. Among them, the two second contact portions 841 are disposed opposite to each other, the two third contact portions 843 are disposed opposite to each other, and the second contact portion 841 is perpendicular to the third contact portion 843, also making the entire flexible circuit board 80 electrically conductive, and the mounting portion 81 can also elastically lift relative to the frame portion 83. Of course, the second contact portion 841 and the third contact portion 843 can also be designed in various structural forms such as arc-shaped arrangement, circular arrangement, or inclined arrangement. The inner frame portion 842 can also be designed as a multi-segment split L-shaped or semi-frame structure.

[0052] It can be understood that the mounting portion 81, the second contact portion 841, the inner frame portion 842, the third contact portion 843, and the frame portion 83 can also be integrally formed by etching to reduce the manufacturing difficulty of components. This structural method makes the elastic stiffness of the mounting portion 81 relatively large, which is suitable for the movement control of a more sensitive photosensitive chip 60. At the same time, due to the annular arrangement of the inner frame portion 842, the wiring method of the flexible circuit board 80 can be made more flexible.

[0053] As Figure 7 As shown, as yet another embodiment, the flexible circuit board 80 is still provided with a hollowed-out portion. The difference is that the elastic portion includes a strip-shaped fourth contact portion 851 and a second bending portion 852. The two ends of the second bending portion 852 are respectively connected to the mounting portion 81 and the frame portion 83 through the two fourth contact portions 851. The second bending portion 852 and the two fourth contact portions 851 are connected to form an overall bent strip-shaped structure, and multiple bent strip-shaped structures are connected in parallel between the mounting portion 81 and the frame portion 83. Also making the entire flexible circuit board 80 electrically conductive, and the mounting portion 81 can also elastically lift relative to the frame portion 83. Of course, the second bending portion 852 can also be designed as a bow-shaped, arc-shaped, or wavy strip-shaped structure. Similarly, the mounting portion 81, the fourth contact portion 851, the second bending portion 852, and the frame portion 83 can also be integrally formed by etching.

[0054] It can be understood that the above-mentioned hollowed-out part refers to the hollowed-out part on the flexible circuit board 80. The structural forms of different elastic parts result in different stiffnesses of the elastic lifting of the mounting part 81. At the same time, the electrical conductivity of the flexible circuit board 80 is also different. According to different models or specifications of the photosensitive chip 60 mounted on the mounting part 81, a flexible circuit board 80 with different structural forms of elastic parts can be selected.

[0055] It should be noted that due to the structural design of the mounting part and the elastic part of the above-mentioned flexible circuit board 80, it can not only be applied to the scenario where the photosensitive chip 60 moves along the optical axis direction of the camera module 10, but also be applied to the application of the photosensitive chip 60 in the anti-shake scenario of the camera module. That is, the photosensitive chip 60 can not only move in the vertical direction of the plane where the flexible circuit board 80 is located, but also move or twist in the plane direction where the flexible circuit board 80 is located.

[0056] As Figures 1 to 3 shown, the unbent part or the frame part 83 of the flexible circuit board 80 is fixed between the second bracket 21 and the base 90, so that the mounting part 81 is located in the middle area of the base 90. Among them, the sunken groove structure in the middle area of the base 90 can provide space for the lifting of the mounting part 81. A carrier board 71 is fixedly connected to the mounting part 81. The carrier board 71 is integrally in a plate structure. The carrier board 71 can be connected to the mounting part 81 as a split structure or integrally formed with the mounting part 81. Of course, the carrier board 71 can also be designed with grooves adapted to the photosensitive chip 60. When the photosensitive chip 60 is mounted on the carrier board 71, the surface of the photosensitive chip 60 is flush with the surface of the carrier board 71. The carrier board 71 can also be designed with grooves for installing the position sensor 72, and the position of the position sensor 72 is set opposite to the position of the position magnetic part 23.

[0057] Among them, the position sensor 72 includes, but is not limited to, position sensors such as Hall sensors or TMR magnetic sensors. The position sensor 72 can be set directly opposite to the position magnetic part 23 or obliquely opposite to the position magnetic part 23, as long as the position sensor 72 can sense the change in the magnetic field angle of the position magnetic part 23. The carrier board 71 can be made of rigid circuit boards, conductive aluminum foil sheets or copper sheets.

[0058] As Figures 1 to 3As shown, a coil assembly is connected to the carrier plate 71. The coil assembly and the magnetic assembly are combined to form an electromagnetic drive assembly for providing a driving force to the carrier plate 71. The coil assembly includes a first bracket 51 and a coil body 52. The first bracket 51 is integrally a frame structure with a hollow middle part. The first bracket 51 is fixedly connected to the carrier plate 71. The photosensitive chip 60 is located at the hollow position in the middle of the frame structure and can receive the image signal projected by the camera assembly 10. Two winding posts 53 are spaced on the outer side wall of one side of the first bracket 51. A set of coil bodies 52 are wound between the two winding posts 53 to form coil bodies 52 side-wound on the first bracket 51. Similarly, winding posts 53 and coil bodies 52 are also provided on the other side of the first bracket 51 opposite to the coil bodies 52. Among them, the coil bodies 52 are electrically connected to the carrier plate 71. Of course, the first bracket 51 can also be designed as a polygonal frame structure. According to the specific structure of the first bracket 51, more sets of coil bodies 52 can be side-wound on the first bracket 51, and each set of coil bodies 52 corresponds to the position of the magnetic part 22 on the second bracket 21 respectively.

[0059] As Figure 2 and Figure 3 shown, when the second bracket 21 is connected to the base 90, the position magnetic part 23 is opposite to the position of the position sensor 72, and the magnetic part 22 is opposite to the position of the coil body 52. Among them, since the side-wound coil body 52 changes the direction of the current within the range of a single magnetic part 22, the magnetic part 22 arranged opposite to the side-wound coil body 52 is a single-sided bipolar magnet. When the coil body 52 is powered on, the coil body 52 generates a magnetic thrust under the magnetic field action of the magnetic part 22 and drives the carrier plate 71 to move along the optical axis direction of the camera assembly 10 through the first bracket 51, thereby driving the photosensitive chip 60 on the carrier plate 71 to move along the optical axis direction of the camera assembly 10.

[0060] It can be understood that due to the reasonable structural design and position arrangement of the photosensitive chip 60, the coil assembly, and the position sensor 72, the photosensitive chip 60, the coil assembly, and the position sensor 72 can be simultaneously carried on the carrier plate 71, so that the structure of the camera module is more compact, which is beneficial to reducing the shoulder height dimension and volume of the camera module.

[0061] As Figure 11As shown in the figure, as another implementation manner, the first bracket 51 can also cancel the structural design of the wire winding post 53 and change it to a structural manner of opening a wire winding groove along the circumferential direction of the first bracket 51. A set of coil bodies 52 are wound in the wire winding groove in a surrounding manner, and the coil bodies 52 can also drive the photosensitive chip 60 to move along the optical axis direction of the camera module. Among them, since the surrounding coil body 52 does not change the direction of the current within the range of a single magnetic part 22, the magnetic part 22 arranged opposite to the surrounding coil body 52 is a single-sided single-pole magnet. Of course, the number of single-sided single-pole magnets in this embodiment is not specifically limited. In this embodiment, according to the surrounding shape of the coil body 52, four magnetic parts 22 can be arranged around the coil body 52 respectively.

[0062] It can be understood that whether the coil body 52 is wound on the first bracket 51 in a side-winding or surrounding manner, the magnetic part 22 can be fixed on the inner side wall of the second bracket 21. Therefore, for the two winding methods of the coil body 52, it is not necessary to change the relative position of the magnetic part 22 in the second bracket 21, which facilitates the later maintenance work of the camera module.

[0063] In order to accurately control the movement of the photosensitive chip 60 along the optical axis direction of the camera assembly 10, in some embodiments, a guiding structure can also be provided between the first bracket 51 and the second bracket 21 to ensure the accuracy of the movement of the photosensitive chip 60. Among them, the guiding structure includes but is not limited to arranging guiding posts on the base 90 and arranging guiding grooves on the first bracket 51 that cooperate with the guiding posts, and the photosensitive chip 60 moves along the optical axis direction of the camera assembly 10 through the cooperation of the guiding grooves and the guiding posts. Of course, a structure of cooperating a ball with a rolling groove can also be adopted between the first bracket 51 and the second bracket 21.

[0064] As Figures 1 to 3 shown, an installation step is provided inside the side wall of the first bracket 51, and a filter 40 is placed inside the hollow position in the middle of the first bracket 51. The filter 40 is located between the camera assembly 10 and the photosensitive chip 60 and is used to filter out useless light waves. After the second bracket 21 is connected and fixed to the base 90, an elastic member is connected between the second bracket 21 and the first bracket 51. The elastic member can be a spring piece 30, or an elastic rubber or silica gel structure, etc., so that after the photosensitive chip 60 moves, it is reset under the combined action of the spring piece 30 and the elastic part of the flexible circuit board 80.

[0065] The principle of automatic focusing of the present invention is as follows: The coil body 52 is powered by the flexible circuit board 80. Since the camera module 10, the flexible circuit board 80, and the magnetic component are all relatively fixed, the energized coil body 52 cuts the magnetic induction lines to generate a magnetic thrust force, and moves by adsorption or repulsion relative to the magnetic component 22 under the action of the magnetic field force of the magnetic part 22. The first bracket 51, the second bracket 21, and the base 90 play a role in guiding the movement of the coil body 52, so that the carrier plate 71 drives the photosensitive chip 60 to move along the optical axis direction of the camera module 10 against the elastic force of the elastic part. The image signal obtained by the camera module 10 sequentially passes through the opening at the top of the second bracket 21, the filter 40, and the hollow position in the middle of the first bracket 51, and finally forms an image on the photosensitive chip 60. When the coil body 52 loses power, the photosensitive chip 60 resets under the combined elastic force of the elastic piece 30 and the elastic part of the flexible circuit board 80. At the same time, the position sensor 72 continuously obtains the relative position of the position magnetic part 23 and feeds back the focal length of the automatic focusing.

[0066] The present invention makes full use of the flexible characteristics of the flexible circuit board 80, and designs the flexible circuit board 80 in the form of a combination of a mounting part 81 and an elastic part, which not only realizes the circuit function of the flexible circuit board 80 itself, but also plays a role in supporting and elastic for the photosensitive chip 60. At the same time, the carrier plate 71 mounts the photosensitive chip 60, the coil assembly, and the position sensor 72, and the structural design is compact. Different from the prior art in which the camera module is driven by a driving motor to move, the design of the driving motor is cancelled, making the shoulder height and volume of the camera module smaller.

[0067] In addition, different from the prior art, the present invention adjusts the focal length by driving the photosensitive chip 60 to move along the optical axis direction of the camera module. For the entire camera module during use, the overall shoulder height of the camera module is certain, which is beneficial to determining the installation space of the camera module. In the prior art, the shoulder height of the camera module during use changes due to driving the camera module 10 to move, which is not beneficial to determining the installation space of the camera module.

[0068] As Figures 8 to 10 shown, based on the camera module in the above embodiment, the coil assembly and the magnetic assembly can be further improved as follows: The coil body 52 is directly disposed on the surface of the carrier plate 71 by etching or pasting. Specifically, a boss protruding from the surface of the carrier plate 71 can be provided on the carrier plate 71, and the boss can locally increase the thickness of the carrier plate 71 to ensure the etching depth of the coil body 52. Among them, according to the shape of the etched coil body, the magnetic part 22 can be either a single-sided single-pole magnet or a single-sided double-pole magnet. The magnetic part 22 is fixed at the top inside the second bracket 21, and the position of the magnetic part 22 is set opposite to that of the coil body 52.

[0069] Among them, the thickness of the carrier plate 71 can also be selected according to the etching depth of the coil body 52, so that the coil body 52 can be directly etched on the plate surface of the carrier plate 71 without designing a boss structure. However, in order to reduce the thickness of the carrier plate 71, only the carrier plate 71 within the range of the coil body 52 needs to be locally thickened, that is, the above-mentioned boss is formed.

[0070] It can be understood that by integrating the coil body 52 on the plate surface of the carrier plate 71 by means of etching or pasting, the magnetic member 22 and the carrier plate 71 can be arranged in a stacked manner. Different from the way that the coil body 52 is wound around or surrounded by the first bracket 51, the horizontal dimension of the entire camera module is reduced. At the same time, since the first bracket 51 only needs to carry the filter 40, the thicknesses of the carrier plate 71 and the first bracket 51 are thinner, thereby further reducing the shoulder height dimension of the camera module and further reducing the volume of the entire camera module.

[0071] As Figure 8 shown in Figure 9 the outer side wall of the first bracket 51 can be provided with a groove structure adapted to the outer contours of the coil body 52 and the magnetic member 22, so that the groove cooperates with the boss to play a guiding role in the movement of the carrier plate 71. At this time, the main function of the first bracket 51 is to carry the filter 40. Therefore, the first bracket 51 can be designed to have a thinner thickness, which is beneficial to further reducing the shoulder height of the camera module, thereby further reducing the volume of the camera module.

[0072] It can be understood that in this embodiment, the number of the magnetic members 22 and the coil bodies 52 etched on the carrier plate 71 is not specifically limited either.

[0073] It should be noted that in addition to being designed into a discontinuous structure as Figure 8 shown in Figure 8 by means of etching or pasting, the coil bodies 52 on the carrier plate 71 can also be connected end to end by four groups of bosses to form an integral ring structure. In other words, Figure 1 the shape of the coil body 52 etched or pasted as shown in Figure 11 is similar to the shape of the coil body 52 wound around the side as shown in

[0074] The present invention also provides a terminal device, including the camera module in the above embodiments. The terminal device includes, but is not limited to, devices such as mobile phones, tablets, or laptop computers. The terminal device only needs to open a small-sized opening to install the camera module of the present invention.

[0075] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A camera module, characterized in that, comprising: a camera component including a lens barrel and a plurality of lenses defining an optical axis; a flexible member, the flexible member including a mounting portion (81), a frame portion, and an elastic portion connecting the mounting portion and the frame portion (83); a carrier board (71) connected to the mounting portion (81) and located on a side of the mounting portion facing the camera component; a coil assembly provided on the carrier board (71), the coil assembly including a first bracket (51) and at least two coil bodies (52), the at least two coil bodies being respectively located on opposite sides of the first bracket; a filter (40) provided at a hollow position in the middle of the first bracket (51); a photosensitive chip (60) provided on the carrier board (71); a magnetic assembly, the magnetic assembly including a second bracket (21) and a magnetic member (22) located inside the second bracket, the magnetic member (22) being correspondingly arranged with the coil body (52), wherein, after the coil assembly is energized, a magnetic thrust is generated to drive the carrier board (71) to move, and the carrier board (71) drives the photosensitive chip (60) to move in a direction parallel to the optical axis.

2. The camera module according to claim 1, characterized in that, four of the elastic portions are provided between the mounting portion (81) and the frame portion (83), and the four elastic portions are respectively provided outside four corners of the mounting portion; each of the elastic portions includes a contact portion connected to the mounting portion (81) and a contact portion connected to the frame portion, the contact portions connected to the mounting portion (81) are distributed on opposite outer edges in a first direction of the mounting portion, and the contact portions connected to the frame portion (83) are distributed on opposite inner edges in a second direction of the frame portion, and the second direction is perpendicular to the first direction.

3. The camera module according to claim 1, characterized in that, a plurality of the elastic portions are provided between the mounting portion (81) and the frame portion (83), and a projection of the plurality of elastic portions on a plane perpendicular to the optical axis is an axisymmetric figure, and the axisymmetric figure has two axes of symmetry in a first direction and in a second direction, and the two axes of symmetry are perpendicular to each other.

4. The camera module according to claim 1, characterized in that, the camera module further includes an elastic member connecting the second bracket (21) and the first bracket (51).

5. The camera module according to claim 1, characterized in that, the elastic member includes two separately provided elastic sheets (30), and the two elastic sheets are respectively provided corresponding to opposite side edges of the first bracket (51).

6. The camera module according to claim 1, characterized in that, the number of the magnetic members is at least two, and they are respectively correspondingly arranged with the at least two coil bodies one by one.

7. The camera module according to claim 6, characterized in that, The coil and the corresponding magnetic member are disposed opposite to each other in a direction perpendicular to the optical axis.

8. The camera module according to claim 1, wherein, a sunk groove structure capable of providing the lifting of the mounting portion (81) is formed in the middle region of the base (90).

9. The camera module according to claim 1, wherein, each coil body (52) is wound around two winding posts (53), and the two winding posts are spaced apart on the same outer side wall of the first bracket (51).

10. The camera module according to claim 1, wherein, the coil body (52) is etched on the surface of the carrier plate (71), a boss is provided on the surface of the carrier plate (71), and the coil body (52) is disposed on the boss.

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