CN113206934A

CN113206934A - Camera module and mobile terminal

Info

Publication number: CN113206934A
Application number: CN202110377134.5A
Authority: CN
Inventors: 胡北
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2021-08-03
Anticipated expiration: 2041-04-08
Also published as: CN113206934B

Abstract

The embodiment of the application provides a camera module and a mobile terminal, wherein the camera module comprises a fixed seat, a lens component capable of automatically focusing, a driving component fixedly arranged on the fixed seat, an image sensor component positioned on one side of the driving component far away from the lens component and a flexible circuit board, and the driving component is used for driving the image sensor component to translate along a direction vertical to an optical axis; the flexible circuit board comprises a first movable part extending along a first direction and a second movable part bent from the first movable part to a second direction, the first movable part is fixedly connected and electrically connected with the image sensor assembly, the first direction and the second direction are perpendicular to the optical axis, and the first direction and the second direction are intersected. According to the camera module provided by the embodiment of the application, the driving assembly drives the image sensor assembly to translate along the direction perpendicular to the optical axis so as to realize shake compensation.

Description

Camera module and mobile terminal

Technical Field

The application relates to the technical field of optical imaging, in particular to a camera module and a mobile terminal.

Background

The mobile terminal is exemplified by a mobile phone, and the mobile phone has an auto-focusing lens assembly. In general, by driving the lens assembly to move to realize shake compensation, the lens assembly is easily shaken during shooting, which easily affects imaging quality.

Disclosure of Invention

In view of this, the embodiment of the present application provides an anti-shake camera module and a mobile terminal, and the technical solution of the embodiment of the present application is implemented as follows:

an aspect of the embodiments of the present application provides a camera module, including:

a fixed seat;

a lens assembly capable of auto-focusing;

the driving component is fixedly arranged on the fixed seat;

the image sensor assembly is positioned on one side of the driving assembly, which is far away from the lens assembly, and the driving assembly is used for driving the image sensor assembly to translate along a direction vertical to an optical axis; and

the flexible circuit board comprises a first movable part extending along a first direction and a second movable part bent from the first movable part to a second direction, wherein the first movable part is fixedly connected with the image sensor assembly and electrically connected with the image sensor assembly, the first direction and the second direction are perpendicular to the optical axis, and the first direction and the second direction are intersected.

In some embodiments, the first movable portion and the second movable portion are disposed around the periphery of the fixing base.

In some embodiments, the flexible circuit board includes a substrate extending from the first movable portion to a bottom side of the fixed base, the image sensor assembly includes an image sensor fixedly and electrically connected to the substrate, and a supporting structure located between the driving assembly and the substrate, and both the driving assembly and the substrate are fixedly connected to the supporting structure.

In some embodiments, the fixing base has a limiting space with two open top and bottom sides, the lens assembly is located outside the fixing base and is disposed at an open top side of the limiting space, the substrate is disposed at an open bottom side of the limiting space, the bearing structure is located in the limiting space and has a light transmitting channel, the driving assembly is located in the limiting space and has a light transmitting channel communicated with the light transmitting channel, and the driving assembly drives the bearing structure to translate in the limiting space.

In some embodiments, the fixing base includes the backup pad that has into light mouth, has the baffle and the supporter of light-emitting window, the backup pad with the baffle is followed the direction of height interval of camera module sets up, the supporter support in the backup pad with between the baffle, the backup pad the baffle with the supporter encloses jointly and establishes formation spacing space, the lens subassembly is located go into light mouth department, the base plate is located light-emitting window department.

In some embodiments, the driving assembly includes a connecting member, a shape memory member, and a circuit board, the connecting member includes a connecting plate fixedly connected to the fixing base, and at least one elastic arm fixedly connected to the circuit board and the connecting plate, the circuit board is located between the connecting plate and the base plate, the circuit board is fixedly connected to the base plate and electrically connected to the base plate, and the circuit board and the connecting plate are both fixedly connected to the shape memory member and electrically connected to the shape memory member.

In some embodiments, the elastic arm comprises a first straight arm, a second straight arm and an inclined arm, and a plane perpendicular to the optical axis is taken as a projection plane, and a straight line on which the first straight arm is projected intersects with a straight line on which the second straight arm is projected; under the free state of the elastic arm, the first straight arm, the second straight arm, the inclined arm and the connecting plate are in the same plane, two ends of the inclined arm are respectively and fixedly connected with the first straight arm and the second straight arm, the end part, far away from the second straight arm, of the first straight arm is fixedly connected with the connecting plate, and the bottom surface of the second straight arm is fixedly connected with the top surface of the circuit board.

In some embodiments, the shape memory member is in a long strip shape, a first clamping table is formed on the outer periphery of the connecting plate, a second clamping table is formed on the outer periphery of the circuit board, the first clamping table and the second clamping table are flush with each other in the height direction of the camera module, and two ends of the shape memory member are fixedly connected with the first clamping table and the second clamping table respectively.

In some embodiments, the shape memory member has an elongated shape, and four of the shape memory members have a regular quadrilateral shape.

In some embodiments, the bearing structure includes a bearing plate located between the circuit board and the substrate, the circuit board and the substrate are both fixedly connected and electrically insulated from the bearing plate, the circuit board is formed with a connecting finger extending toward the substrate, the bearing plate has an avoiding notch, and the connecting finger penetrates through the avoiding notch to be fixedly connected and electrically connected with the substrate.

In some embodiments, the bearing structure includes an insulating plate disposed between the circuit board and the bearing plate, and both the circuit board and the bearing plate are fixedly connected to the insulating plate and electrically insulated from each other.

In some embodiments, the circuit board is formed with an accommodating opening, and the camera module includes sliding members disposed in the accommodating opening in a one-to-one correspondence, and the sliding members are supported between the connecting plate and the bearing plate.

In some embodiments, the slider is movably disposed between the connecting plate and the carrier plate; or the like, or, alternatively,

one of the connecting plate and the bearing plate is fixedly connected with the sliding part, and the other of the connecting plate and the bearing plate is abutted to the sliding part.

In some embodiments, the fixing base has a limiting space with two open top and bottom sides, the lens assembly is located outside the fixing base and is disposed at an open top side of the limiting space, the substrate is disposed at an open bottom side of the limiting space, the bearing structure and the driving assembly are both located in the limiting space, the driving assembly is formed with a light-transmitting channel penetrating through the connecting plate and the circuit board, the bearing structure is formed with a light-transmitting channel penetrating through the bearing plate, and the light-transmitting channel is communicated with the light-transmitting channel;

the bearing structure comprises an elastic column arranged on the outer peripheral side of the bearing plate, and the elastic column is in elastic contact with the inner wall surface of the limiting space in the process that the bearing structure is driven by the driving assembly to translate in the limiting space.

In some embodiments, the bearing structure includes a bearing table disposed on the outer periphery of the bearing plate, the bearing table and the elastic columns are disposed in one-to-one correspondence, the bearing table is formed with a mounting hole, the elastic columns include a column, a neck fixedly connected to the column, and an expansion body located at one end of the neck away from the column, and the expansion body can resiliently deform to pass through the mounting hole so that the neck is inserted into the mounting hole.

In some embodiments, a plane perpendicular to the optical axis is used as a projection plane, and the projected outer contour of the circuit board is located within the projected outer contour of the carrier board.

In some embodiments, the camera module comprises:

the induction piece is fixedly arranged on the fixed seat; and

the detection piece is fixedly and electrically connected with the substrate and can detect the induction piece in a non-contact manner so as to acquire the current position of the image sensor.

Another aspect of the embodiments of the present application provides a mobile terminal, including:

the camera module of any one of the above; and

the mainboard is fixedly connected with the flexible circuit board and electrically connected with the flexible circuit board.

According to the camera module provided by the embodiment of the application, the driving assembly drives the image sensor assembly to translate along the direction vertical to the optical axis, namely, the image sensor assembly can translate in the plane vertical to the optical axis approximately, so that shake compensation is achieved. On one hand, the image sensor assembly is lighter in weight and lower in requirement on the driving force of the driving assembly, and the driving assembly drives the image sensor assembly more conveniently and is lower in cost. On the other hand, because the first movable part extends along the first direction, the second movable part bends towards the second direction, a set included angle is formed between the first movable part and the second movable part, and in the process that the driving assembly drives the image sensor assembly to translate along the direction perpendicular to the optical axis, the first movable part and/or the second movable part deflect at a certain angle around the optical axis so as to adapt to the movement distance of the image sensor assembly and avoid pulling the flexible circuit board, thereby avoiding the damage of electric wiring and/or electronic components on the flexible circuit board. In another aspect, the flexible circuit board is provided with the electric wires and/or the electronic components, so that the process is simpler, the yield is higher, and the cost is lower.

Drawings

Fig. 1 is a schematic structural diagram of a camera module according to an embodiment of the present application;

FIG. 2 is an exploded view of the structure shown in FIG. 1;

FIG. 3 is another exploded view of the structure of FIG. 1;

FIG. 4 is a schematic view of a portion of the structure of FIG. 1 from another perspective, wherein the lens assembly is not shown;

fig. 5 is a schematic structural view of a fixing base in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a driving assembly according to an embodiment of the present application;

FIG. 7 is a schematic view of the structure of FIG. 6 from another perspective;

FIG. 8 is a schematic diagram of the structure of FIG. 6 from yet another perspective;

FIG. 9 is a schematic structural diagram of a connector according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a circuit board in an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a load bearing structure according to an embodiment of the present application;

FIG. 12 is an exploded view of the structure shown in FIG. 11;

FIG. 13 is a schematic view of an assembly of a carrier structure and a drive assembly in an embodiment of the present application;

fig. 14 is a schematic view of the structure shown in fig. 13 from another perspective.

Description of the reference numerals

A fixed seat 10; a spacing space 10 a; a support plate 11; a light entrance 11 a; accommodating groove 11 b; a baffle plate 12; a light exit 12 a; a support body 13; a lens assembly 20; an actuator 21; a lens barrel 22; a drive assembly 30; a light passing channel 30 a; a connecting member 31; a connecting plate 311; a first light passing hole 311 a; a first holding table 3111; a resilient arm 312; a first flat arm 3121; a second straight arm 3122; the tilting arm 3123; a shape memory member 32; a circuit board 33; the receiving port 33 a; a second light passing hole 33 b; a second clamping table 331; the connecting fingers 332; an image sensor assembly 40; an image sensor 41; the load bearing structure 42; the light-transmitting channel 42 a; a carrier plate 421; an avoidance notch 421 a; a first light-transmitting hole 421 b; an insulating plate 422; a second light-transmitting hole 422 a; a through hole 422 b; a susceptor 423; the mounting holes 423 a; side plates 4231; the resilient posts 424; a column 4241; a neck portion 4242; an enlarged body 4243; a flexible circuit board 50; a first movable portion 51; the second movable portion 52; a substrate 53; a slider 60; a sensing member 70; the detecting member 80.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail with reference to the accompanying drawings, it should be noted that in the embodiments of the present application, "top", "bottom" and "height direction" refer to the directions shown in fig. 1 and 7, the first direction, the second direction and the optical axis refer to the directions shown in fig. 4, the directions or positional relationships in the description of the embodiments of the present application are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and should not be considered as limiting the embodiments of the present application, and all other embodiments obtained by a person having ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

Referring to fig. 1 to 4, an aspect of the present disclosure provides a camera module, which includes a fixing base 10, a lens assembly 20 capable of automatically focusing, a driving assembly 30 fixedly disposed on the fixing base 10, an image sensor assembly 40 located on a side of the driving assembly 30 away from the lens assembly 20, and a flexible circuit board 50, where the driving assembly 30 is configured to drive the image sensor assembly 40 to translate along a direction perpendicular to an optical axis, the flexible circuit board 50 includes a first movable portion 51 extending along a first direction, and a second movable portion 52 bent from the first movable portion 51 to a second direction, the first movable portion 51 is fixedly connected and electrically connected to the image sensor assembly 40, where the first direction and the second direction are both perpendicular to the optical axis, and the first direction and the second direction intersect. Specifically, the optical axis refers to the optical axis of the lens assembly.

In the camera module provided by the embodiment of the present application, the driving component 30 drives the image sensor component 40 to translate along a direction perpendicular to the optical axis, that is, the image sensor component 40 can generally translate in a plane perpendicular to the optical axis, for example, the image sensor component 40 can translate along the first direction or the second direction, so as to implement shake compensation. On one hand, since the image sensor assembly 40 has a light weight and requires a low driving force for the driving assembly 30, the driving assembly 30 drives the image sensor assembly 40 more conveniently and at a lower cost. On the other hand, because the first movable portion 51 extends along the first direction, the second movable portion 52 bends towards the second direction, a set included angle is formed between the first movable portion 51 and the second movable portion 52, and in the process that the driving assembly 30 drives the image sensor assembly 40 to translate along the direction perpendicular to the optical axis, the first movable portion 51 and/or the second movable portion 52 deflect at a certain angle around the optical axis to adapt to the movement distance of the image sensor assembly 40, so that the flexible circuit board 50 is prevented from being pulled, and the electric wiring and/or the electronic components on the flexible circuit board 50 are prevented from being damaged. Taking the image sensor assembly 40 translating along the second direction as an example, the first movable portion 51 deflects a certain angle around the optical axis, and the set included angle between the first movable portion 51 and the second movable portion 52 is correspondingly increased or decreased, so that the first movable portion 51 and the second movable portion 52 are not directly pulled. Taking the image sensor assembly 40 translating along the first direction as an example, the first movable portion 51 pushes the second movable portion 52 to deflect around the optical axis by a certain angle, so that the first movable portion 51 and the second movable portion 52 are not directly pulled. In another aspect, the flexible circuit board 50 is provided with electrical traces and/or electronic components, which is simpler in process, higher in yield and lower in cost.

The Flexible Circuit board 50 (FPC) has characteristics such as high wiring density, light weight, small thickness, and good bendability. The substrate of the flexible circuit board 50 includes, but is not limited to, polyimide or polyester film, etc.

The specific shapes of the first movable portion 51 and the second movable portion 52 are not limited, and for example, in an embodiment, referring to fig. 1 to 4, the first movable portion 51 and the second movable portion 52 are both flat. Thus, the first movable portion 51 and the second movable portion 52 have simple structures, and are more convenient for arranging electric wires. In another embodiment, the first movable portion 51 and the second movable portion 52 may also have a certain curvature, for example, the first movable portion 51 and the second movable portion 52 are both arc-shaped.

Taking an example that the camera module in any embodiment of the present application is applied to a mobile terminal, the mobile terminal provided in the embodiment of the present application includes, but is not limited to, a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a portable computer, and the like. For example, in some embodiments, the mobile terminal has a small overall size and a relatively light weight, and a user can take a shot by holding the mobile terminal. The mobile terminal comprises a camera module and a mainboard in any embodiment of the present application, and the mainboard is fixedly connected and electrically connected with the flexible circuit board 50.

According to the mobile terminal provided by the embodiment of the application, in the shooting process, the imaging light of the shot object enters the lens assembly 20 and then reaches the image sensor 41, photons in the imaging light strike the image sensor 41 to generate movable charges, which are internal photoelectric effects, and the movable charges are collected to form electric signals. The flexible circuit board 50 transmits the electrical signal to the main board. The mainboard is provided with an A/D converter (analog-to-Digital converter) and a DSP (Digital Signal Processor), the A/D converter converts the electric signals into Digital signals, and the Digital signals are processed by the DSP. And finally, the image is transmitted to a screen of the mobile terminal to be displayed, namely, the shooting of the shot object is realized.

The image sensor 41 may be a CMOS (Complementary Metal Oxide Semiconductor) or a CCD (Charge Coupled Device), or may be another type of image sensor 41 other than a CMOS or a CCD, such as a CID (Charge Injection Device). It will be appreciated that for CMOS, the DSP may be integrated within the CMOS. The CMOS has the advantages of high integration level, low power consumption, low cost and the like, and is more suitable for mobile phones with limited installation space.

The specific manner of the lens assembly 20 for automatic focusing is not limited, and for example, in an embodiment, referring to fig. 1 and fig. 3, the lens assembly 20 includes an actuator 21 fixedly disposed on the fixing base 10, a lens barrel 22 fixedly connected to the actuator 21, and a lens group disposed in the lens barrel 22, wherein the actuator 21 drives the lens barrel 22 to translate along an optical axis, and the lens barrel 22 drives the lens group to move synchronously. In this manner, translation of the lens assembly 20 along its optical axis can be achieved. In another embodiment, the lens assembly 20 includes a liquid lens. A liquid lens refers to an optical lens made of one or more liquids. The liquid lens can change the liquid state and thus change the focal length. That is, the liquid lens is capable of performing an auto-focus function of the lens assembly 20 without translating along the optical axis.

The specific type of the actuator 21 is not limited, and the actuator 21 includes, but is not limited to, a voice coil motor, a stepping motor, a piezoelectric motor, or the like.

In order to facilitate the first movable portion 51 and the second movable portion 52 to move in a translational manner with the image sensor assembly 40, in an embodiment, please refer to fig. 1 and 4, the first movable portion 51 and the second movable portion 52 are disposed around the outer periphery of the fixing base 10. Thus, the first movable portion 51 and the second movable portion 52 have a large moving space.

In an exemplary embodiment, the fixing base 10 is substantially hexahedral, and a plane of the first movable portion 51 and a plane of the second movable portion 52 are parallel to two adjacent sides of the fixing base 10. Specifically, the side surface of the fixing seat 10 connects the top surface of the fixing seat 10 and the bottom surface of the fixing seat 10. Therefore, the space occupied by the first movable part 51 and the second movable part 52 is small, the first movable part 51 and the second movable part 52 can be prevented from directly contacting the corners outside the fixed seat 10, and the reliability is improved.

In one embodiment, referring to fig. 1 to 4, the flexible circuit board 50 includes a substrate 53 extending from the first movable portion 51 to the bottom side of the fixing base 10, the image sensor assembly 40 includes an image sensor 41 fixedly and electrically connected to the substrate 53, and a supporting structure 42 located between the driving assembly 30 and the substrate 53, and both the driving assembly 30 and the substrate 53 are fixedly connected to the supporting structure 42. The driving assembly 30 drives the bearing structure 42 to translate, and the bearing structure 42 drives the substrate 53 and the image sensor 41 fixedly arranged on the substrate 53 to translate synchronously. On one hand, the substrate 53 is located outside the fixing base 10, and the moving space of the substrate 53 is larger, which not only facilitates the substrate 53 to move in a translational motion along with the carrying structure 42, but also prevents the electronic components on the substrate 53, such as the image sensor 41, from colliding with the fixing base 10 or other structural members, and damaging the electronic components and/or the electrical traces on the substrate 53. On the other hand, the substrate 53 is a part of the flexible circuit board 50, and the substrate 53, the first movable portion 51 and the second movable portion 52 are made of the same base material, so that the electrical wiring is conveniently arranged on the substrate 53, the first movable portion 51 and the second movable portion 52, and the reliability is higher. In yet another aspect, the carrier structure 42 can strengthen the substrate 53, strengthening the connection between the driver assembly 30 and the image sensor assembly 40.

In an embodiment, referring to fig. 2 to 5, the fixing base 10 has a limiting space 10a with two open top and bottom sides, the lens assembly 20 is located outside the fixing base 10 and disposed at the open top side of the limiting space 10a, the substrate 53 is disposed at the open bottom side of the limiting space 10a, the bearing structure 42 is located in the limiting space 10a and has a light transmitting channel 42a, the driving assembly 30 is located in the limiting space 10a and has a light transmitting channel 30a communicated with the light transmitting channel 42a, and the driving assembly 30 drives the bearing structure 42 to translate in the limiting space 10 a.

The base plate 53 is located outside the fixing base 10 and disposed at the bottom side opening of the spacing space 10a, that is, the image sensor 41 is located on the top surface of the base plate 53, and the image sensor 41 is located at the bottom side opening of the spacing space 10 a. The light-passing channel 30a corresponds to the top open position of the limiting space 10a, the light-transmitting channel 42a corresponds to the bottom open position of the limiting space 10a, and the imaging light of the lens assembly 20 enters the limiting space 10a through the top open position of the limiting space 10a, and then is projected onto the image sensor 41 through the light-passing channel 30a, the light-transmitting channel 42a and the bottom open position of the limiting space 10 a. Under the condition of camera module shaking, the driving assembly 30 drives the bearing structure 42 to translate in the limiting space 10a, and the bearing structure 42 drives the substrate 53 and the image sensor 41 to translate synchronously to compensate the shaking. The bearing structure 42 is located in the limiting space 10a, and the limiting space 10a limits the movable range of the bearing structure 42, for example, the bearing structure 42 abuts against the inner bottom wall surface of the limiting space 10a, so as to limit the bearing structure 42 to translate towards the bottom side, and thus, the distance between the lens assembly 20 and the image sensor 41 along the optical axis direction is prevented from increasing.

The specific structure of the fixing base 10 is not limited, in an embodiment, referring to fig. 3 and 5, the fixing base 10 includes a supporting plate 11 having a light inlet 11a, a baffle 12 having a light outlet 12a, and a supporting body 13, the supporting plate 11 and the baffle 12 are arranged at intervals along a height direction of the camera module, the supporting body 13 is supported between the supporting plate 11 and the baffle 12, the supporting plate 11, the baffle 12, and the supporting body 13 together enclose a limiting space 10a, the lens assembly 20 is located at the light inlet 11a, and the substrate 53 is located at the light outlet 12 a. Thus, the fixing seat 10 has a simple structure and a light weight. The imaging light of the lens assembly 20 enters the limiting space 10a through the light inlet 11a and is projected onto the image sensor 41 through the light outlet 12 a.

In one embodiment, referring to fig. 3 and 5, the supporting plate 11 and the supporting body 13 may be an integral structure. Thus, the manufacturing process of the fixing seat 10 is further simplified, and the structure is simplified. After assembling the drive assembly 30, the support structure 42, and other structural components, the baffle 12 is bonded or welded to the support body 13.

The specific shape of the support plate 11 is not limited, and the shape of the support plate 11 includes, but is not limited to, a circle, an ellipse, a polygon, or the like. For example, in an embodiment, referring to fig. 2, 3 and 5, the supporting plate 11 is a square with a light inlet 11a in the central area. The shape of the light inlet 11a is not limited, and exemplary shapes of the light inlet 11a include, but are not limited to, a circle, an ellipse, a polygon, or other shapes.

The specific arrangement position and number of the supporting bodies 13 are not limited, and in an embodiment, referring to fig. 3 and 5, the supporting bodies 13 are multiple, and the multiple supporting bodies 13 are arranged at intervals along the circumferential direction of the supporting plate 11. Thus, the structure of the fixing base 10 is more stable. In an exemplary embodiment, referring to fig. 3 and 5, four supporting bodies 13 are uniformly arranged along the circumferential direction of the supporting plate 11. In this way, the baffle plate 12 and the support plate 11 can be more stably supported. Further, the support plate 11 is a square having a light entrance 11a in a central area. The four supporting bodies 13 are respectively disposed on four corners of the square supporting plate 11.

In the present embodiment, the number of the plurality of the fingers is two or more.

The particular shape of the baffle 12 is not limited, and the shape of the baffle 12 includes, but is not limited to, circular, elliptical, polygonal, or the like. In an exemplary embodiment, referring to fig. 3 and 5, the baffle 12 is a square with a light outlet 12a in the central area. The shape of the light outlet 12a is not limited, and exemplary shapes of the light outlet 12a include, but are not limited to, a circle, an ellipse, a polygon, or other shapes. The light outlet 12a has a larger size, so that the imaging light is projected onto the image sensor 41, and the supporting structure 42 is fixedly connected to the substrate 53.

The specific structure of the driving assembly 30 is not limited, in an embodiment, referring to fig. 3, 4 and 6, the driving assembly 30 includes a connecting member 31, a shape memory member 32 and a circuit board 33, the connecting member 31 includes a connecting plate 311 fixedly connected to the fixing base 10, and at least one elastic arm 312 fixedly connected to the circuit board 33 and the connecting plate 311, the circuit board 33 is located between the connecting plate 311 and the base plate 53, the circuit board 33 is fixedly and electrically connected to the base plate 53, and both the circuit board 33 and the connecting plate 311 are fixedly and electrically connected to the shape memory member 32.

The connection plate 311 is fixed, the connection plate 311 and the circuit board 33 are fixedly connected by the elastic arm 312, and the circuit board 33 is movable. Under the condition that shake compensation is needed, the substrate 53, the circuit board 33, the connecting plate 311 and the shape memory element 32 are electrified, the shape memory element 32 is heated and heated, the shape memory element 32 generates recoverable deformation after heating, and the shape memory element 32 drives the circuit board 33, the substrate 53 and the image sensor 41 to translate along the deformation direction. When the initial positions of the circuit board 33, the substrate 53 and the image sensor 41 need to be restored, the power is cut off among the substrate 53, the circuit board 33, the connecting plate 311 and the shape memory member 32, the shape memory member 32 is cooled, and when the actual temperature of the shape memory member 32 is reduced to the preset temperature, the shape memory member 32 is restored to be deformed, and the circuit board 33, the substrate 53 and the image sensor 41 are restored to the initial positions.

It should be noted that the shape memory element 32 is a material that can be restored to deform when the actual temperature changes, and when the actual temperature reaches the preset temperature, the original shape of the material before deformation can be restored.

The specific material of the Shape Memory element 32 is not limited, and for example, in an embodiment, the Shape Memory element 32 is a Shape Memory Alloy (SMA), which refers to an alloy material that can be restored to a Shape when the temperature is raised by heating, and that can restore the original Shape before the deformation when the actual temperature is lowered to the preset temperature. That is, the Shape Memory alloy is a material composed of two or more metal elements having a Shape Memory Effect (SME) by thermo-elastic and martensitic transformation and inversion thereof.

The number of the elastic arms 312 is not limited, and in an embodiment, referring to fig. 6 and 9, the number of the elastic arms 312 is multiple, and the multiple elastic arms 312 are uniformly arranged along the circumferential direction of the connecting plate 311. Illustratively, the number of the elastic arms 312 is two, and the two elastic arms 312 are symmetrically and uniformly distributed. In another embodiment, the number of resilient arms 312 is one.

In an embodiment, referring to fig. 6 and 9, the elastic arm 312 includes a first straight arm 3121, a second straight arm 3122 and an inclined arm 3123, and a plane perpendicular to the optical axis is taken as a projection plane, and a line on which the first straight arm 3121 projects intersects a line on which the second straight arm 3122 projects; in the free state of the elastic arm 312, the first straight arm 3121, the second straight arm 3122, the inclined arm 3123, and the connecting plate 311 are in the same plane, that is, the first straight arm 3121, the second straight arm 3122, the inclined arm 3123, and the connecting plate 311 are in the same plane without the elastic arm 312 being subjected to an external force. The two ends of the inclined arm 3123 are respectively fixedly connected with the first straight arm 3121 and the second straight arm 3122, the end portion of the first straight arm 3121 far away from the second straight arm 3122 is fixedly connected with the connecting plate 311, and the bottom surface of the second straight arm 3122 is fixedly connected with the top surface of the circuit board 33. In this way, on the one hand, the circuit board 33 is moved in the direction away from the connection plate 311 in the optical axis direction by the action of gravity or the like, and the elastic arm 312 pulls back the circuit board 33 by the action of the elastic deformation force. On the other hand, the second straight arm 3122 is connected to the circuit board 33 with a larger area, so that the connection between the second straight arm 3122 and the circuit board 33 is more stable. On the other hand, the straight line on which the first straight arm 3121 projects and the straight line on which the second straight arm 3122 projects intersect with each other on the plane perpendicular to the optical axis, so that the design is such that, during the synchronous translation of the circuit board 33 along with the shape memory element 32, the first straight arm 3121 and the inclined arm 3123 can change the deformation direction at the same time, and the single stress of the first straight arm 3121 and the inclined arm 3123 is prevented from being too concentrated, thereby preventing the first straight arm 3121 and the inclined arm 3123 from being fatigued excessively.

In one embodiment, referring to fig. 9, the connecting member 31 is an integrally formed structure. Illustratively, the connecting member 31 is a conductive elastic sheet integrally formed of a metal having ductility.

In one embodiment, referring to fig. 6 to 9, the shape memory member 32 is in a long strip shape, a first holding table 3111 is formed on the outer periphery of the connecting plate 311, a second holding table 331 is formed on the outer periphery of the circuit board 33, the first holding table 3111 and the second holding table 331 are flush with each other in the height direction of the camera module, and two ends of the shape memory member 32 are fixedly connected to the first holding table 3111 and the second holding table 331 respectively. The first holding table 3111 and the second holding table 331 are flush with each other so that the shape memory member 32 is disposed substantially in a direction perpendicular to the optical axis, facilitating layout of the shape memory member 32 to control the driving direction of the shape memory member 32. The first holding table 3111 is located at the outer peripheral side table of the connecting plate 311, and the second holding table 331 is located at the outer peripheral side of the circuit board 33, so that the first holding table 3111, the second holding table 331 and the shape memory member 32 are prevented from occupying the limited space between the connecting plate 311 and the circuit board 33, and the size of the camera module in the height direction thereof is facilitated to be reduced.

The specific structure of the first holding table 3111 and the second holding table 331 is not limited, and for example, referring to fig. 6 and 7, a first holding groove is formed on the first holding table 3111, one end portion of the shape memory member 32 is located in the first holding groove, and the second holding table 331 is tightened to tightly couple the inner wall surface of the first holding groove and the end portion of the shape memory member 32, thereby clamping the shape memory member 32. The second holding table 331 is formed with a second holding groove in which the other end portion of the shape memory member 32 is located, and the second holding table 331 is tightened to tightly engage the inner wall surface of the second holding groove with the end portion of the shape memory member 32, thereby clamping the shape memory member 32. Thus, both ends of the shape memory member 32 are fixedly connected to the first holding table 3111 and the second holding table 331, respectively.

The number of the shape memory members 32 is not limited, and in one embodiment, referring to fig. 8, the shape memory members 32 are in the shape of a strip, and four shape memory members 32 are in the shape of a regular quadrangle. That is, two of the four shape memory members 32 are parallel, and the directions of the two adjacent shape memory members 32 are perpendicular to each other. In this manner, the image sensor assembly 40 is controlled by the four shape memory members 32 to translate in multiple directions perpendicular to the optical axis.

The amount of deformation of the single shape memory element 32 and/or the number of deformed shape memory elements 32, etc. can be controlled based on the current position of the image sensor 41. for example, in one embodiment, only one of the shape memory elements 32 can be elongated or shortened, or two parallel shape memory elements 32 can be elongated or shortened simultaneously, and the image sensor assembly 40 is moved in the direction of the shape memory elements 32. In another embodiment, two adjacent shape memory members 32 may be elongated or shortened, respectively, and the image sensor assembly 40 is translated in a direction intersecting the direction of any one of the shape memory members 32. In yet another embodiment, any three of the shape memory elements 32 may be elongated or shortened, respectively. In yet another embodiment, four shape memory members 32 are extended or shortened, respectively.

In an embodiment, referring to fig. 3 and fig. 10 to 14, the supporting structure 42 includes a supporting plate 421 located between the circuit board 33 and the substrate 53, the circuit board 33 and the substrate 53 are both fixedly connected and electrically insulated from the supporting plate 421, the circuit board 33 is formed with a connecting finger 332 extending toward the substrate 53, the supporting plate 421 has an avoiding notch 421a, and the connecting finger 332 passes through the avoiding notch 421a to be fixedly connected and electrically connected with the substrate 53. The carrier plate 421 serves to reinforce the connection strength between the base plate 53 and the circuit board 33. Since the electrically insulating carrier 421 is disposed between the circuit board 33 and the substrate 53, the difficulty in designing the circuit board 33 can be reduced.

Specifically, the substrate 53 is a flexible insulating substrate, and the carrier 421 can be electrically insulated from the substrate 53.

In one embodiment, referring to fig. 3, fig. 11 and fig. 12, the top surface of the carrier 421 is adhered to the circuit board 33. The bottom surface of the carrier plate 421 is adhered to the substrate 53. Thus, the connection strength between the circuit board 33, the substrate 53 and the carrier 421 is further enhanced.

In one embodiment, the circuit board 33 is a conductive metal substrate. On one hand, it is convenient to design and manufacture the circuit board 33 so that an electric circuit is formed between the circuit board 33 and the connecting member 31 and the shape memory member 32. On the other hand, the circuit board 33 may be made into a structure with a small thickness by a metal process, which is convenient for reducing the size of the camera module in the height direction thereof.

The specific way of electrically insulating the circuit board 421 from the circuit board 33 is not limited, and for example, in an embodiment, referring to fig. 11 to 14, the carrying structure 42 includes an insulating board 422 disposed between the circuit board 33 and the circuit board 421, and both the circuit board 33 and the circuit board 421 are fixedly connected to the insulating board 422 and electrically insulated. Thus, the carrier plate 421 can be a metal substrate, and thus is made into a structure with a thinner thickness by a metal process, which is convenient for reducing the size of the camera module in the height direction thereof. In another embodiment, the insulating plate 422 may be coated with an insulating layer. Thus, the loading board 421 and the circuit board 33 can be electrically insulated. In another embodiment, the supporting board 421 is made of an insulating material such as plastic, silicon gel, or rubber. Thus, the carrier 421 can be electrically insulated from the circuit board 33, but the thickness of the carrier 421 is relatively thick.

In one embodiment, referring to fig. 11 to 14, the top surface of the insulating plate 422 is bonded to the circuit board 33. The bottom surface of the insulating plate 422 is adhered to the carrier plate 421. In this way, the connection strength between the circuit board 33, the substrate 53, and the insulating plate 422 is further enhanced.

In order to better support the driving assembly 30 and the carrying structure 42, in an embodiment, referring to fig. 9 to 14, the circuit board 33 is formed with an accommodating opening 33a, the camera module includes sliding members 60 disposed in the accommodating openings 33a in a one-to-one correspondence, and the sliding members 60 are supported between the connecting plate 311 and the carrying plate 421. In one aspect, the slider 60 provides a supporting force for supporting the connecting plate 311 and the carrier plate 421, and the elastic arm 312 is designed to pull back the circuit board 33, and the slider 60 stretches the connecting plate 311 and the carrier plate 421, so as to balance the forces applied to the circuit board 33 and the connecting plate 311 in the optical axis direction. On the other hand, the sliding member 60 has a low coefficient of friction and generates a low frictional resistance, thereby preventing the relative movement between the driving assembly 30 and the bearing structure 42 from being affected.

In an embodiment, referring to fig. 9 to 14, the sliding member 60 is movably disposed between the connecting plate 311 and the supporting plate 421. That is, the slider 60 can move within the receiving opening 33 a. The receiving opening 33a can restrict the movement of the slider 60 to prevent the slider 60 from being detached from the receiving opening 33 a.

In one embodiment, referring to fig. 12, the insulating plate 422 has through holes 422b corresponding to the sliding members 60, and the sliding members 60 are accommodated in the through holes 422 b. The through hole 422b also restricts the movement of the slider 60, preventing the slider 60 from coming off the through hole 422 b.

In order to further prevent the sliding member 60 from sliding off, in an embodiment, one of the connecting plate 311 and the carrying plate 421 is fixedly connected to the sliding member 60, and the other of the connecting plate 311 and the carrying plate 421 abuts against the sliding member 60. For example, in one embodiment, the connecting plate 311 is fixedly connected to the slider 60, and the supporting plate 421 abuts against the slider 60. In another embodiment, the supporting plate 421 is fixedly connected to the sliding member 60, and the connecting plate 311 abuts against the sliding member 60.

The specific shape and structure of the sliding member 60 are not limited, and for example, in an embodiment, referring to fig. 3 and 13, the sliding member 60 is spherical. In an embodiment, in a state that the slider 60 is movably disposed between the connecting plate 311 and the loading plate 421, the contact surface of the slider 60 with the connecting plate 311 and the loading plate 421 is smaller, so as to further reduce the frictional resistance. In another embodiment, the slider 60 has a polyhedral shape, such as a hexahedral shape.

In one embodiment, referring to fig. 2 to 5, the connection plate 311 and the supporting plate 421 are located in the limiting space 10 a. In this way, the limit space 10a is used to further limit the translation of the loading plate 421 in the direction of optically moving away from the connecting plate 311, so as to further prevent the sliding of the slider 60.

In an embodiment, referring to fig. 2, fig. 5 and fig. 8 to fig. 14, the fixing base 10 has a limiting space 10a with two open top and bottom sides, the lens assembly 20 is located outside the fixing base 10 and disposed at the open top side of the limiting space 10a, the substrate 53 is disposed at the open bottom side of the limiting space 10a, the bearing structure 42 and the driving assembly 30 are both located in the limiting space 10a, the driving assembly 30 is formed with a light-passing channel 30a penetrating through the connecting plate 311 and the circuit board 33, the bearing structure 42 is formed with a light-passing channel 42a penetrating through the bearing plate 421, and the light-passing channel 42a is communicated with the light-passing channel 30 a.

The light-transmitting channel 30a corresponds to the top side opening of the limiting space 10a, and the light-transmitting channel 42a corresponds to the bottom side opening of the limiting space 10 a. The imaging light of the lens assembly 20 enters the limiting space 10a through the top open part of the limiting space 10a, and then is projected onto the image sensor 41 through the light passing channel 30a, the light transmitting channel 42a and the bottom open part of the limiting space 10 a. Specifically, the connecting plate 311 is formed with a first light passing hole 311a, the circuit board 33 is formed with a second light passing hole 33b, and both the first light passing hole 311a and the second light passing hole 33b are part of the light passing channel 30 a. The carrier plate 421 has a first light hole 421b, and the first light hole 421b is a portion of the light passage 42 a.

In some embodiments, referring to fig. 11 and 12, the insulating plate 422 is formed with a second light-transmitting hole 422a, and the second light-transmitting hole 422a is a part of the light-transmitting channel 42 a.

Referring to fig. 11 to 14, the supporting structure 42 includes an elastic column 424 disposed on an outer peripheral side of the supporting plate 421, and when the driving assembly 30 drives the supporting structure 42 to translate in the limiting space 10a, the elastic column 424 elastically contacts an inner wall surface of the limiting space 10 a. Elastic column 424 and spacing space 10 a's internal wall face elastic contact avoids image sensor subassembly 40 striking fixing base 10 in the motion process, leads to image sensor subassembly 40 to rock or be impaired, plays the cushioning effect.

Referring to fig. 11 to 14, the supporting structure 42 includes a supporting platform 423 disposed on an outer periphery of the supporting plate 421, the supporting platform 423 and the elastic columns 424 are disposed in a one-to-one correspondence, the supporting platform 423 is formed with a mounting hole 423a, the elastic columns 424 include a column 4241, a neck 4242 fixedly connected to the column 4241, and an expansion 4243 located at an end of the neck 4242 away from the column 4241, and the expansion 4243 can be deformed to pass through the mounting hole 423a so that the neck 4242 is inserted into the mounting hole 423 a.

The enlarged body 4243 has a size larger than that of the mounting hole 423 a. The expansion body 4243 deforms to penetrate through the mounting hole 423a until the neck 4242 penetrates through the mounting hole 423a, and the expansion body 4243 restores deformation, so that the expansion body 4243 and the cylinder 4241 act together to prevent the neck 4242 from falling out of the mounting hole 423 a.

The specific shape of the dilatant 4243 is not limited, and in an exemplary embodiment, referring to fig. 11 and 12, the dilatant 4243 has a disk shape.

The specific material of the dilatant 4243 is not limited, and in an exemplary embodiment, the base material of the dilatant 4243 includes, but is not limited to, flexible plastic, rubber, silicone, or the like.

In an embodiment, referring to fig. 13 and 14, a plane perpendicular to the optical axis is taken as a projection plane, and the projection outer contour of the circuit board 33 is located within the projection outer contour of the carrier 421. Thus, on the one hand, the circuit board 33 is prevented from colliding with the inner wall surface of the stopper space 10a, so that the circuit board 33 is protected.

In one embodiment, referring to fig. 11 and 12, the supporting platform 423 includes two intersecting side plates 4231, and each side plate 4231 is formed with a mounting hole 423 a; the cylinder 4241 is hexahedron, two sides of the cylinder 4241 corresponding to the side plates 4231 are respectively provided with a neck 4242 and an expansion body 4243, and the two necks 4242 are respectively arranged on the mounting holes 423a of the two side plates 4231 in a penetrating way. In this way, the elastic column 424 can be more stably assembled to the carrier 423.

In one embodiment, referring to fig. 2, the camera module includes a sensing element 70 fixedly disposed on the fixing base 10, and a detecting element 80 fixedly and electrically connected to the substrate 53. The detecting member 80 can contactlessly detect the sensing member 70 to acquire the current position of the image sensor 41. The detecting member 80 is positioned on the base plate 53 to facilitate power supply to the detecting member 80. During the translation process of the substrate 53 and the image sensor 41, the detecting element 80 translates synchronously with the substrate 53, the distance between the detecting element 80 and the sensing element 70 changes, and the detecting element 80 cooperates with the sensing element 70 to detect the current position of the image sensor 41. In this way, it is convenient to move the image sensor 41 so that the photosensitive surface of the image sensor 41 is aligned with the lens assembly 20 to achieve shake compensation. The detecting element 80 detects the sensing element 70 in a non-contact manner, so as to avoid a physical connection, such as a wire or other connecting structure, between the detecting element 80 and the sensing element 70, thereby avoiding the physical connection from interfering with the synchronous translation of the detecting element 80 along with the substrate 53.

The specific structure of the sensing element 70 and the detecting element 80 is not limited, and in an embodiment, please refer to fig. 2, the sensing element 70 is a permanent magnet. The detecting member 80 is a magnetic field sensor, such as a hall sensor.

The number of the sensing members 70 is not limited, and in one embodiment, referring to fig. 3 and 6, the four shape memory members 32 are distributed in a regular quadrilateral shape. The number of the sensing members 70 is at least three, each sensing member 70 is disposed between two adjacent shape memory members 32, and the detecting members 80 are disposed in one-to-one correspondence with the sensing members 70. In this manner, accurate acquisition of the current position of the image sensor 41 is facilitated.

The specific position of the sensing element 70 on the fixing base 10 is not limited, and for example, in an embodiment, please refer to fig. 2, fig. 3 and fig. 5, the supporting plate 11 is recessed toward the bottom side to form an accommodating groove 11b, and the sensing element 70 is disposed in the accommodating groove 11 b.

In the description above, references to "some embodiments," "an embodiment," "another embodiment," or "a specific embodiment" describe a subset of all possible embodiments, and thus, the appearances of "some embodiments" or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment, and furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments, it being understood that "some embodiments," "an embodiment," "another embodiment," or "a specific embodiment" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.

The above description is only for the embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.

Claims

1. The utility model provides a camera module which characterized in that includes:

a fixed seat;

a lens assembly capable of auto-focusing;

the driving component is fixedly arranged on the fixed seat;

2. The camera module according to claim 1, wherein the first movable portion and the second movable portion are disposed around an outer periphery of the fixing base.

3. The camera module according to claim 1, wherein the flexible circuit board includes a substrate extending from the first movable portion to a bottom side of the fixed base, the image sensor assembly includes an image sensor fixedly and electrically connected to the substrate, and a supporting structure located between the driving assembly and the substrate, and both the driving assembly and the substrate are fixedly connected to the supporting structure.

4. The camera module according to claim 3, wherein the fixing base has a limiting space with two open top and bottom sides, the lens assembly is located outside the fixing base and disposed at an open top side of the limiting space, the substrate is disposed at an open bottom side of the limiting space, the supporting structure is located in the limiting space and has a light transmitting channel, the driving assembly is located in the limiting space and has a light transmitting channel communicated with the light transmitting channel, and the driving assembly drives the supporting structure to translate in the limiting space.

5. The camera module according to claim 4, wherein the fixing base includes a supporting plate having a light inlet, a baffle having a light outlet, and a supporting body, the supporting plate and the baffle are spaced apart from each other along a height direction of the camera module, the supporting body is supported between the supporting plate and the baffle, the supporting plate, the baffle, and the supporting body together enclose the limiting space, the lens assembly is located at the light inlet, and the substrate is located at the light outlet.

6. The camera module according to claim 3, wherein the driving assembly comprises a connecting member, a shape memory member, and a circuit board, the connecting member comprises a connecting plate fixedly connected to the fixing base and at least one elastic arm fixedly connecting the circuit board and the connecting plate, the circuit board is located between the connecting plate and the base plate, the circuit board is fixedly connected and electrically connected to the base plate, and the circuit board and the connecting plate are both fixedly connected and electrically connected to the shape memory member.

7. The camera module according to claim 6, wherein the elastic arm comprises a first straight arm, a second straight arm and an inclined arm, and a plane perpendicular to the optical axis is taken as a projection plane, and a line on which the first straight arm projects intersects with a line on which the second straight arm projects; under the free state of the elastic arm, the first straight arm, the second straight arm, the inclined arm and the connecting plate are in the same plane, two ends of the inclined arm are respectively and fixedly connected with the first straight arm and the second straight arm, the end part, far away from the second straight arm, of the first straight arm is fixedly connected with the connecting plate, and the bottom surface of the second straight arm is fixedly connected with the top surface of the circuit board.

8. The camera module according to claim 6, wherein the shape memory member has an elongated shape, a first holding stage is formed on an outer peripheral side of the connecting plate, a second holding stage is formed on an outer peripheral side of the circuit board, the first holding stage and the second holding stage are flush with each other in a height direction of the camera module, and both ends of the shape memory member are fixedly connected to the first holding stage and the second holding stage, respectively.

9. The camera module of claim 6, wherein the shape memory member is elongated and four of the shape memory members are disposed in a regular quadrilateral.

10. The camera module of claim 6, wherein the carrier structure includes a carrier plate located between the circuit board and the substrate, the circuit board and the substrate are both fixedly connected and electrically insulated from the carrier plate, the circuit board is formed with a connecting finger extending toward the substrate, the carrier plate has an avoiding notch, and the connecting finger is fixedly connected and electrically connected to the substrate through the avoiding notch.

11. The camera module of claim 10, wherein the carrier structure includes an insulating plate disposed between the circuit board and the carrier plate, and both the circuit board and the carrier plate are fixedly connected to and electrically insulated from the insulating plate.

12. The camera module of claim 10, wherein the circuit board is formed with receiving openings, and the camera module includes sliding members disposed in the receiving openings in a one-to-one correspondence, and the sliding members are supported between the connecting plate and the carrier plate.

13. The camera module of claim 12, wherein said slider is movably disposed between said connecting plate and said carrier plate; or the like, or, alternatively,

14. The camera module according to claim 10, wherein the fixing base has a limiting space with two open top and bottom sides, the lens assembly is located outside the fixing base and is disposed at an open top side of the limiting space, the substrate is disposed at an open bottom side of the limiting space, the supporting structure and the driving assembly are both located in the limiting space, the driving assembly is formed with a light-passing channel penetrating through the connecting plate and the circuit board, the supporting structure is formed with a light-passing channel penetrating through the supporting plate, and the light-passing channel is communicated with the light-passing channel;

15. The camera module according to claim 14, wherein the bearing structure includes a bearing table disposed on an outer peripheral side of the bearing plate, the bearing table and the elastic columns are disposed in one-to-one correspondence, the bearing table is formed with a mounting hole, the elastic column includes a column, a neck fixedly connected to the column, and an expansion body located at an end of the neck away from the column, and the expansion body is resiliently deformable to pass through the mounting hole so that the neck is inserted into the mounting hole.

16. The camera module according to claim 14, wherein a plane perpendicular to the optical axis is a projection plane, and the projected outer contour of the circuit board is located within the projected outer contour of the carrier plate.

17. The camera module according to any one of claims 3 to 16, wherein the camera module comprises:

the induction piece is fixedly arranged on the fixed seat; and

18. A mobile terminal, comprising:

the camera module of any one of claims 1-17; and