CN109729237B

CN109729237B - Camera module and terminal

Info

Publication number: CN109729237B
Application number: CN201711025382.3A
Authority: CN
Inventors: 钱陈杨; 韩阳; 蒋磊; 牛传猛
Original assignee: Huawei Device Co Ltd
Current assignee: Huawei Device Co Ltd
Priority date: 2017-10-27
Filing date: 2017-10-27
Publication date: 2021-08-20
Anticipated expiration: 2037-10-27
Also published as: CN109729237A

Abstract

The embodiment of the application provides a camera module, including camera lens, microscope base and bonding piece, the bottom surface of camera lens is crossing with the optical axis of camera lens, and the bottom surface of camera lens passes through bonding piece rigid coupling with the top surface of microscope base, fixes a position through unsmooth cooperation structure between the bottom surface of camera lens and the top surface of microscope base. The camera module is small in size. The embodiment of the application also provides a terminal.

Description

Camera module and terminal

Technical Field

The application relates to the technical field of communication equipment, in particular to a camera module and an application thereof.

Background

At present, the Lens (Lens) of a camera module of a mobile phone is connected with a Lens base through a structure that threads are embedded with each other. The external screw thread is established to the periphery side of camera lens, and the internal thread is established to the interior periphery side of microscope base, and the mutual mosaic structure of screw tooth that external screw thread and internal thread formed occupies great space on the vertical plane of optical axis, leads to the microscope base overall dimension great, and the camera module need occupy great space, is unfavorable for the development trend of the whole lightness of cell-phone.

Disclosure of Invention

The embodiment of the application provides a camera module with small size and an application terminal of the camera module.

In a first aspect, an embodiment of the present application provides a camera module. The camera module comprises a lens, a lens base and a bonding piece. The bottom surface of the lens is intersected with the optical axis of the lens. The optical axis of the lens refers to a line passing through the center of the lens. The bottom surface of the lens is fixedly connected with the top surface of the lens base through the bonding piece. In other words, the adhesive member is adhered between the bottom surface of the lens and the top surface of the lens holder. The bottom surface of the lens and the top surface of the lens base are positioned through a concave-convex matching structure.

In this embodiment, since the lens and the lens holder of the camera module are fixedly connected to each other through the adhesive member, a screw and thread mutual-embedding structure in the prior art can be omitted, so that the space occupied by the camera module is reduced, and the volume of the camera module is small. Through the bonding piece will the camera lens rigid coupling extremely the mode of microscope base can improve right the control accuracy of the optical axis of camera lens, thereby improve the shooting quality of camera module can also simplify the assembly process of camera module, reduce the equipment degree of difficulty of camera module. Simultaneously, the camera lens with the microscope base passes through unsmooth cooperation structure location to can improve the equipment intensity of camera module, make the camera module can bear the weight of bigger perpendicular to the shearing force of optical axis, in order when the camera module takes place to fall, reduce the camera lens breaks away from the risk of microscope base.

It can be understood that the bottom surface of the lens and the top surface of the lens holder both intersect with the optical axis of the lens, for example, the bottom surface of the lens and the top surface of the lens holder are substantially perpendicular to the optical axis of the lens, so the adhesive member does not occupy additional space on the perpendicular plane of the optical axis of the lens, the size of the camera module on the perpendicular plane of the optical axis of the lens is smaller, and the volume of the camera module is reduced. Simultaneously, the accessible control the piece that bonds is in the ascending thickness of parallel direction of optical axis to avoid increasing substantially the camera module is in the ascending size of parallel direction of optical axis makes the whole volume of camera module is less. The camera lens of the camera module is an integrated lens, and the camera module is a fixed focusing camera module.

In one embodiment, the lens is provided with a groove. The groove is recessed from the bottom surface of the lens to the inside of the lens. In other words, the groove is recessed in a direction away from the mirror base. The mirror base is provided with a bulge. The bulge protrudes out of the top surface of the microscope base. In other words, the protrusion protrudes toward the lens. The protrusion extends into the groove to form the concave-convex matching structure.

In this embodiment, the lens holder is provided with the protrusion, the lens is provided with the groove, and the protrusion extends into the groove to form the concave-convex matching structure, so that the structure of the concave-convex matching structure of the camera module is simple, and the assembly difficulty is low.

It can be understood that, because the thickness of the lens in the direction parallel to the optical axis is large, and the overall thickness of the lens holder in the direction parallel to the optical axis is small, the groove is formed in the lens and the protrusion is formed in the lens holder, and the groove does not affect the structural strength of the lens, so that the lens and the lens holder have reliable structural strength, and the concave-convex matching structure can reliably position the lens and the lens holder, so that the overall structure of the camera module is reliable.

Of course, in other embodiments, a protrusion may be disposed on the lens, a groove may be disposed on the lens base, and the protrusion may extend into the groove to form a concave-convex matching structure.

In one embodiment, a dimension of the protrusion in a parallel direction of the optical axis is in a range of 0.2 mm to 0.3 mm. The protrusion has a first size and a second size on a vertical plane of the optical axis, and the direction of the first size is perpendicular to the direction of the second size. For example, if the cross-section of the protrusion in a plane perpendicular to the optical axis is rectangular, the long side of the protrusion has the first size and the short side of the protrusion has the second size. The first size is greater than or equal to the second size. For example, the first dimension is in a range of 0.3 millimeters to 0.7 millimeters. The second dimension is in a range of 0.3 millimeters to 0.7 millimeters.

In one embodiment, the adhesive member is a rubber ring. The adhesive member may be formed by a dispensing process. The adhesive piece can be made of an Allonga super-energy adhesive material. The protrusion is positioned in the space enclosed by the bonding piece. The bonding piece is in contact with the periphery of the bottom surface of the lens and the periphery of the top surface of the lens holder, namely the bonding piece is bonded and sealed between the periphery of the bottom surface of the lens and the periphery of the top surface of the lens holder, so that water vapor and dust can be prevented from entering the camera module from the space between the bottom surface of the lens and the top surface of the lens holder. The bulges are positioned between the bonding pieces, namely the bulges and the bonding pieces are arranged in a staggered mode, so that the bonding pieces can be continuously molded to increase the bonding strength of the bonding pieces, the bonding pieces can continuously bond the periphery of the bottom surface of the lens and the periphery of the top surface of the lens base, and the bonding between the lens and the lens base is firm and reliable. Of course, in other embodiments, the adhesive member may be a double-sided tape.

In one embodiment, the projection has a top surface and a peripheral side surface disposed about the top surface. The top surface of the bulge is far away from the top surface of the mirror base so as to form a certain distance with the top surface of the mirror base. The circumferential side surface of the protrusion is connected between the top surface of the protrusion and the top surface of the mirror base. The recess has a bottom wall and a peripheral side wall disposed about the bottom wall. The bottom wall of the groove is far away from the bottom surface of the lens, so that a certain distance is reserved between the bottom wall of the groove and the bottom surface of the lens. The peripheral side wall of the groove is connected between the bottom wall of the groove and the bottom surface of the lens.

A first gap is formed between the top surface of the protrusion and the bottom wall of the groove. A size of the first gap in a parallel direction of the optical axis may be in a range of 0.1 mm to 0.15 mm. A second gap is formed between the circumferential side surface of the protrusion and the circumferential side wall of the groove. A size of the second gap in a perpendicular direction of the optical axis may be in a range of 0.15 mm to 0.2 mm.

In this embodiment, the first gap and the second gap can be used to absorb the machining tolerance and the assembly tolerance of the lens and the lens holder, so that the protrusion smoothly extends into the groove, and the camera module is less difficult to assemble. Simultaneously, first clearance with the second clearance is less, consequently also can avoid influencing the locate function of unsmooth cooperation structure to guarantee the equipment intensity of camera module.

In one embodiment, the number of the concave-convex matching structures is at least one group. Each group of concave-convex matching structures comprises the protrusions and the grooves. The shape of the protrusion in the concave-convex matching structure in the same group is matched with that of the groove, for example, the protrusion is square, and then the groove is also square. When the quantity of unsmooth cooperation structure is the multiunit, the multiunit unsmooth cooperation structure interval sets up to the reinforcing the equipment intensity of camera module. The shape of the protrusions in different sets of the male and female mating structures may be different, at which point the structure of the grooves in different sets of the male and female mating structures is also different. For example, the camera module comprises four groups of concave-convex matching structures, and the shapes of the protrusions in the four groups of concave-convex matching structures are different from each other. When the L-shaped protrusion is matched with the groove, the positioning strength of the concave-convex matching structure is higher. Of course, in other embodiments, the shapes of the protrusions of the multiple sets of concave-convex matching structures may be the same, or some of the protrusions may be different. In one embodiment, a single set of the male and female mating structures may also include a plurality of the protrusions and a single groove, and a plurality of the protrusions extend into the same groove.

In one embodiment, the lens holder is further provided with a through hole. The through hole penetrates from the top surface of the mirror base to the bottom surface of the mirror base. The number of the projections is multiple. The plurality of protrusions are distributed around the through hole at intervals. For example, a plurality of the protrusions may be respectively arranged at opposite sides of the through-hole. At this moment, the assembling strength of the camera module can be enhanced, and the space in the direction of the protrusions which are not arranged can be saved, so that the size of the camera module is more miniaturized.

In one embodiment, the wall of the through hole is provided with a limiting surface. The limiting surface faces the lens. The camera module further comprises an optical filter, and the optical filter is contained in the through hole and fixedly connected with the limiting surface. The optical filter can be used for filtering infrared light so as to ensure the imaging effect. The filter may be made of blue glass. The optical filter and the limiting surface can be bonded through a bonding ring. The adhesive ring can be formed by a dispensing process or a double-sided adhesive tape is adopted.

In one embodiment, the camera module further includes a circuit board and a sensor chip fixed (soldered or bonded) on the circuit board. The circuit board is fixedly connected with the bottom surface of the mirror base. The circuit board can be fixedly connected to the bottom surface of the mirror base through the laminating layer. The laminating layer can be formed by adopting a dispensing process or a double-sided adhesive tape. The sensor chip is accommodated in the through hole. At this time, the optical filter is located between the lens and the sensor chip. The sensor chip is used for converting an optical signal into an image signal. The center of the sensor chip is aligned with the optical axis of the lens so as to better collect images and improve the shooting quality of the camera module. The circuit board can also be provided with other electronic elements accommodated in the through holes.

In one embodiment, the circuit board includes a rigid plate portion and a flexible plate portion. The rigid plate part can not be bent almost, and the flexible plate part can be bent. The circuit board may be a rigid-flex printed circuit board. The rigid plate portion contacts a bottom surface of the lens holder. The rigid plate part can stably support the lens base and the sensor chip, so that the camera module is stable in structure. The rigid plate part is a rigid plate part in the rigid-flexible printed circuit board. The flexible plate part is connected with the rigid plate part. The flexible plate part is a flexible plate part in the rigid-flexible printed circuit board.

In one embodiment, the camera module further comprises a reinforcing rubber strip, and the reinforcing rubber strip is bonded to one end of the flexible plate portion, which is connected with the rigid plate portion. In one embodiment, the reinforcing rubber strip may further bond the rigid plate portion. In one embodiment, the reinforcing rubber strip may further bond the flexible plate portion and the peripheral side surface of the lens holder. At this time, the reinforcing rubber is bonded to a connecting region between the flexible plate portion and the rigid plate portion. Because stress when gentle board portion buckles concentrates easily the connection region leads to the connection region is easy to be broken or damaged, consequently sets up the reinforcement adhesive tape can strengthen the regional intensity of connection reduces the risk that the connection region takes place to damage, thereby prolongs camera module's life. The cross section of the reinforcing rubber strip can be triangular so as to improve the reinforcing effect.

Wherein the circuit board further comprises a connecting rigid plate portion. The connecting rigid plate portion is hardly bendable. The connecting rigid plate part is a rigid plate part in the rigid-flexible printed circuit board. The camera module further comprises an electric connector arranged on the connecting rigid plate part.

In one embodiment, the lens barrel includes a lens barrel and a lens group fixed inside the lens barrel. The lens group can be fixed on the inner side of the lens barrel in an adhesion mode to form an integrated lens. The lens barrel comprises a lens barrel body, a lens barrel cover and a plurality of grooves, wherein the number of the grooves is multiple, and the grooves are arranged on the lens barrel body at intervals. The arrangement of the plurality of grooves is matched with the arrangement of the plurality of bulges, so that the plurality of bulges correspondingly extend into the plurality of grooves one to one.

The lens group is sequentially provided with a plurality of lenses at intervals along the optical axis of the lens. And a space ring is arranged between the adjacent lenses. The space ring can keep the optical interval of the lens and can also ensure that the light path is within the same aperture range of the space ring. Of course, the spacer can also avoid the abrasion caused by the direct contact between two adjacent lenses. The space ring can adopt Mylar film, namely polyethylene terephthalate film.

Optionally, the lens barrel is provided with a vent hole. The vent hole penetrates through the lens barrel and is communicated with the through hole. When the lens is bonded with the lens base through the bonding piece, air inside the lens barrel and in the vent hole can be discharged to the outside of the camera module through the vent hole, so that the bonding process is smooth, and the assembly quality of the camera module is improved.

In one embodiment, the lens is provided with a first groove and a second protrusion. The first groove is recessed from the bottom surface of the lens to the inside of the lens. The second bulge protrudes out of the bottom surface of the lens. The mirror base is provided with a second groove and a first bulge. The second groove is recessed from the top surface of the mirror base to the inside of the mirror base. The first bulge protrudes out of the top surface of the microscope base. The first protrusion extends into the first groove to form a group of concave-convex matching structures. The second protrusion extends into the second groove to form another group of concave-convex matching structures. The main differences between this embodiment and the previous embodiments are: in all the concave-convex matching structures included in the camera module of this embodiment, the connection relationship between at least one group of the concave-convex matching structures and the lens (or the lens holder) is different from the connection relationship between other groups of the concave-convex matching structures and the lens (or the lens holder).

In this embodiment, two protrusions of the two sets of concave-convex matching structures are respectively disposed on the lens and the lens holder, and two grooves are also respectively formed on the lens and the lens holder, so that the assembly strength of the camera module is higher. Meanwhile, the positions and the shapes of the first groove and the second protrusion can be flexibly designed according to the shape of the lens, and the positions and the shapes of the first protrusion and the second groove can be flexibly designed according to the shape of the lens base, so that the structural strength of a single component (namely the lens and the lens base) and the overall strength of the assembled camera module can be better considered.

It is understood that the fitting relationship between the first protrusion and the first groove and the fitting relationship between the second protrusion and the second groove in this embodiment can be designed by referring to the fitting relationship between the protrusion and the groove in the previous embodiment. The coordination relationships include, but are not limited to: the dimensional relationship. Similarly, other structures of the camera module of this embodiment can be designed with reference to the camera module of the foregoing embodiment, and the other structures include, but are not limited to: the bonding piece, the optical filter, the sensor chip, the circuit board, the reinforcing adhesive tape and the like.

In a second aspect, an embodiment of the present application further provides a terminal, where the terminal includes the camera module according to any one of the foregoing embodiments. The camera module is used for realizing camera shooting functions such as shooting and video recording. The terminal further comprises a display module for realizing touch control and display.

In this embodiment, the camera module has a small volume, so that the terminal using the camera module is light and thin. Because the camera module has higher assembling strength, the reliability of the terminal can be improved, and the service life of the terminal is longer.

In a third aspect, an embodiment of the present application further provides a method for manufacturing a camera module, which can be used to manufacture the camera module described in any of the foregoing embodiments. The manufacturing method of the camera module comprises the following steps:

forming a bonding piece to be cured on the top surface of the lens base in a dispensing manner;

assembling a lens on a lens base so that an adhesive piece to be cured is in contact with the bottom surface of the lens, wherein a concave-convex matching structure is formed between the top surface of the lens base and the bottom surface of the lens; and

and baking and curing the bonding piece to be cured to form the bonding piece.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.

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

fig. 2 is a schematic structural diagram of a camera module according to an embodiment of the present disclosure;

FIG. 3 is a top view of the camera module of FIG. 2;

FIG. 4 is a cross-sectional view of the structure of FIG. 3 at A-A;

FIG. 5 is a cross-sectional view of one embodiment of the structure of FIG. 3 at B-B;

FIG. 6 is an exploded view of the camera module of FIG. 2;

FIG. 7 is a second exploded view of the camera module shown in FIG. 2;

FIG. 8 is an enlarged schematic view of the structure at C in FIG. 5;

FIG. 9 is a cross-sectional view of another embodiment of the structure of FIG. 3 at B-B;

fig. 10 is a schematic diagram illustrating a step 001 of a method for manufacturing a camera module according to an embodiment of the present disclosure;

fig. 11 is a schematic view of step 002 of a method for manufacturing a camera module according to an embodiment of the present application;

fig. 12 is a schematic view of step 003 in the method for manufacturing a camera module according to the embodiment of the present application.

Detailed Description

The embodiments of the present application will be described below with reference to the drawings.

Referring to fig. 1, a terminal 100 is provided according to an embodiment of the present application. The terminal 100 according to the embodiment of the present application may be any device having communication and storage functions, for example: the system comprises intelligent equipment with a network function, such as a tablet Computer, a mobile phone, an electronic reader, a remote controller, a Personal Computer (PC), a notebook Computer, vehicle-mounted equipment, a network television, wearable equipment and the like. The terminal 100 includes a camera module 200. The camera module 200 is used for realizing camera functions such as photographing and video recording. The terminal 100 further includes a display module 300 for implementing touch control and display.

Referring to fig. 2 to 7, a camera module 200 is further provided in the present embodiment. The camera module 200 includes a lens 1, a lens holder 2 and an adhesive member 3. The bottom surface 11 of the lens 1 intersects the optical axis 10 of the lens 1. The optical axis 10 of the lens 1 refers to a line passing through the center of the lens 1. The bottom surface 11 of the lens 1 is fixedly connected with the top surface 21 of the lens holder 2 through the adhesive piece 3. In other words, the adhesive member 3 is adhered between the bottom surface 11 of the lens 1 and the top surface 21 of the lens holder 2. The bottom surface 11 of the lens 1 and the top surface 21 of the lens holder 2 are positioned through a concave-convex matching structure 4.

In this embodiment, since the lens 1 and the lens holder 2 of the camera module 200 are fixedly connected to each other through the adhesive member 3, a screw and thread mutual-embedding structure in the prior art can be omitted, so as to reduce the space occupied by the camera module 200, and make the volume of the camera module 200 smaller. Through the bonding piece 3 will 1 rigid coupling of camera lens extremely the mode of microscope base 2 can improve right the control accuracy of the optical axis 10 of camera lens 1, thereby improve camera module 200's shooting quality can also simplify camera module 200's assembly process, reduce camera module 200's the equipment degree of difficulty. Simultaneously, camera lens 1 with microscope base 2 passes through unsmooth cooperation structure 4 location to can improve camera module 200's equipment intensity, make camera module 200 can bear the weight of bigger perpendicular to the shearing force of optical axis 10, in order when camera module 200 takes place to fall, reduce camera lens 1 breaks away from the risk of microscope base 2. Since the camera module 200 has a small volume, it is advantageous to make the terminal 100 using the camera module 200 light and thin. Since the camera module 200 has high assembly strength, the reliability of the terminal 100 can be improved, so that the terminal 100 has a long service life.

It can be understood that the bottom surface 11 of the lens 1 and the top surface 21 of the lens holder 2 both intersect with the optical axis 10 of the lens 1, for example, the bottom surface 11 of the lens 1 and the top surface 21 of the lens holder 2 are substantially perpendicular to the optical axis 10 of the lens 1, so that the adhesive member 3 does not occupy additional space on the perpendicular plane to the optical axis 10 of the lens 1, and the size of the camera module 200 on the perpendicular plane to the optical axis 10 of the lens 1 is smaller, thereby reducing the volume of the camera module 200. Meanwhile, the thickness of the bonding piece 3 in the parallel direction of the optical axis 10 can be controlled, so that the size of the camera module 200 in the parallel direction of the optical axis 10 is prevented from being greatly increased, and the whole size of the camera module 200 is small. The lens 1 of the camera module 200 is an integrated lens, and the camera module 200 may be a Fixed Focus (FF) camera module.

Referring to fig. 5 to 8, as an alternative embodiment, the lens 1 has a groove 41. The groove 41 is recessed from the bottom surface 11 of the lens 1 toward the inside of the lens 1. In other words, the groove 41 is recessed in a direction away from the mirror base 2. The mirror base 2 is provided with a projection 42. The projection 42 projects from the top surface 21 of the mirror base 2. In other words, the protrusion 42 protrudes 42 in a direction to approach the lens 1. The protrusions 42 extend into the recesses 41 to form the male and female mating structures 4.

In this embodiment, the lens holder 2 is provided with the protrusion 42, the lens 1 is provided with the groove 41, and the protrusion 42 extends into the groove 41 to form the concave-convex matching structure 4, so that the concave-convex matching structure 4 of the camera module 200 has a simple structure and is low in assembly difficulty.

It can be understood that, since the thickness of the lens 1 in the direction parallel to the optical axis 10 is larger, and the overall thickness of the lens holder 2 in the direction parallel to the optical axis 10 is smaller, the groove 41 is provided on the lens 1, and the protrusion 42 is provided on the lens holder 2, the groove 41 does not affect the structural strength of the lens 1, so that both the lens 1 and the lens holder 2 have reliable structural strength, and the male-female mating structure 4 can reliably position the lens 1 and the lens holder 2, so that the overall structure of the camera module 200 is reliable.

Of course, in other embodiments, a protrusion may be disposed on the lens 1, a groove may be disposed on the lens holder 2, and the protrusion may extend into the groove to form the concave-convex matching structure 4.

Optionally, a dimension of the protrusion 42 in a parallel direction of the optical axis 10 is in a range of 0.2 millimeters (mm) to 0.3 mm. The protrusion 42 has a first dimension and a second dimension in a vertical plane of the optical axis 10, and the direction of the first dimension is perpendicular to the direction of the second dimension. For example, if the cross section of the protrusion 42 in the vertical plane of the optical axis 10 is rectangular, the long side of the protrusion 42 has the first size, and the short side of the protrusion 42 has the second size. The first size is greater than or equal to the second size. For example, the first dimension is in a range of 0.3 millimeters to 0.7 millimeters. The second dimension is in a range of 0.3 millimeters to 0.7 millimeters.

Optionally, the adhesive member 3 is a rubber ring. The adhesive member 3 may be formed by a dispensing process. The adhesive member 3 may be made of an Aron Alpha (AA) super-energy adhesive material. The protrusions 42 are located in the space enclosed by the adhesive 3. The adhesive member 3 contacts the periphery of the bottom surface 11 of the lens 1 and the periphery of the top surface 21 of the lens holder 2, that is, the adhesive member 3 is adhered and sealed between the periphery of the bottom surface 11 of the lens 1 and the periphery of the top surface 21 of the lens holder 2, so as to prevent moisture and dust from entering the camera module 200 from between the bottom surface 11 of the lens 1 and the top surface 21 of the lens holder 2. The protrusions 42 are located between the bonding members 3, that is, the protrusions 42 are offset from the bonding members 3, so that the bonding members 3 can be continuously molded to increase the bonding strength of the bonding members 3, and the bonding members 3 can continuously bond the periphery of the bottom surface 11 of the lens 1 and the periphery of the top surface 21 of the lens holder 2, so that the bonding between the lens 1 and the lens holder 2 is firm and reliable. Of course, in other embodiments, the adhesive member 3 may be a double-sided tape.

Optionally, the protrusion 42 has a top surface 421 and a peripheral side surface 422 disposed around the top surface 421. The top surface 421 of the projection 42 is disposed away from the top surface 21 of the mirror base 2 to have a certain distance from the top surface 21 of the mirror base 2. The peripheral side surface 422 of the projection 42 is connected between the top surface 421 of the projection 42 and the top surface 21 of the mirror base 2. The recess 41 has a bottom wall 411 and a peripheral side wall 412 disposed around the bottom wall 411. The bottom wall 411 of the recess 41 is arranged away from the bottom surface 11 of the lens 1 to have a distance to the bottom surface 11 of the lens 1. The peripheral side wall 412 of the groove 41 is connected between the bottom wall 411 of the groove 41 and the bottom surface 11 of the lens 1.

A first gap 413 is formed between the top surface 421 of the protrusion 42 and the bottom wall 411 of the recess 41. A size of the first gap 413 in a parallel direction of the optical axis 10 may be in a range of 0.1 millimeter (mm) to 0.15 mm. A second gap 414 is formed between the peripheral side surface 422 of the projection 42 and the peripheral side wall 412 of the recess 41. The second gap 414 may have a size in a range of 0.15 mm to 0.2 mm in a perpendicular direction of the optical axis 10.

In this embodiment, the first gap 413 and the second gap 414 can be used to absorb the machining tolerance and the assembling tolerance of the lens 1 and the lens holder 2, so that the protrusion 42 smoothly extends into the groove 41, and the assembly difficulty of the camera module 200 is low. Meanwhile, the first gap 413 and the second gap 414 are smaller, so that the positioning function of the concave-convex matching structure 4 can be prevented from being affected, and the assembling strength of the camera module 200 can be ensured.

Optionally, the number of the concave-convex matching structures 4 is at least one group. Each set of said male and female mating structures 4 comprises said protrusion 42 and said recess 41. The shape of the protrusion 42 in the same set of concave-convex matching structures 4 is matched with the shape of the groove 41, for example, if the protrusion 42 is square, the groove 41 is also square. When the quantity of unsmooth cooperation structure 4 is the multiunit, the multiunit unsmooth cooperation structure 4 interval sets up to the reinforcing camera module 200's equipment intensity. The shape of the protrusions 42 in different sets of the mating relief structures 4 may be different, in which case the structure of the recesses 41 in different sets of the mating relief structures 4 is also different. For example, the camera module 200 includes four sets of the concave-convex matching structures 4, and the shapes of the protrusions 42 in the four sets of the concave-convex matching structures 4 are different from each other. When the L-shaped protrusion 42 is matched with the groove 41, the positioning strength of the concave-convex matching structure 4 is higher. Of course, in other embodiments, the shapes of the protrusions 42 of the multiple sets of concave-convex matching structures 4 may be the same, or some of the protrusions may be the same, and some of the protrusions may be different. In one embodiment, a plurality of protrusions 42 and one groove 41 may be included in a single set of the male and female mating structures 4, and a plurality of protrusions 42 may extend into the same groove 41.

Optionally, referring to fig. 4 to 7, the lens base 2 is further provided with a through hole 23. The through hole 23 extends from the top surface 21 of the lens holder 2 to the bottom surface 24 of the lens holder 2. The number of the projections 42 is plural. The plurality of protrusions 42 are distributed at intervals around the through hole 23. For example, a plurality of the protrusions 42 may be respectively arranged at opposite sides of the through-hole 23. At this time, the assembling strength of the camera module 200 can be enhanced, and the space in the direction in which the protrusions 42 are not arranged can be saved, so that the volume of the camera module 200 is more miniaturized.

Optionally, referring to fig. 4, fig. 6 and fig. 7, a limiting surface 25 is disposed on the hole wall of the through hole 23. The limiting surface 25 faces the lens 1. The camera module 200 further includes a filter 5, and the filter 5 is accommodated in the through hole 23 and is fixedly connected to the limiting surface 25. The optical filter 5 can be used for filtering infrared light to ensure an imaging effect. The filter 5 may be made of blue glass. The filter 5 and the limiting surface 25 can be bonded by a bonding ring 51. The adhesive ring 51 may be formed by a dispensing process, or may be formed by a double-sided adhesive tape. A light shield 52 is attached to the surface of the optical filter 5 away from the limiting surface 25, and the light shield 52 is used for shielding peripheral stray light so as to improve the shooting quality of the camera module 200.

Optionally, referring to fig. 2 to 7, the camera module 200 further includes a circuit board 6 and a sensor chip 7 fixed (welded or adhered) on the circuit board 6. The circuit board 6 is fixedly connected with the bottom surface 24 of the mirror base 2. The circuit board 6 may be fixed to the bottom surface 24 of the mirror base 2 by a bonding layer (not shown). The laminating layer can be formed by adopting a dispensing process or a double-sided adhesive tape. The sensor chip 7 is accommodated in the through hole 23. At this time, the filter 5 is located between the lens 1 and the sensor chip 7. The sensor chip 7 is used to convert the optical signal into an image signal. The center of the sensor chip 7 is aligned with the optical axis 10 of the lens 1 to better collect images and improve the shooting quality of the camera module 200. The circuit board 6 may also be provided with other electronic components 62 accommodated in the through holes 23.

Alternatively, referring to fig. 4 to 7, the circuit board 6 includes a rigid plate portion 63 and a flexible plate portion 64. The rigid plate 63 is hardly bendable, and the flexible plate 64 is bendable. The circuit board 6 may be a rigid-flexible printed circuit board. The rigid plate portion 63 contacts the bottom surface 24 of the mirror base 2. The rigid plate portion 63 can stably support the lens holder 2 and the sensor chip 7, so that the camera module 200 is structurally stable. The rigid plate portion 63 is a rigid plate portion in a rigid-flex printed circuit board. The flexible plate portion 64 connects the rigid plate portions 63. The flexible plate portion 64 is a flexible plate portion in a rigid-flex printed circuit board. It is understood that the rigid Board portion 63 may be a Printed Circuit Board (PCB), and the Flexible Board portion 64 may be a Flexible Circuit Board (FPC).

The camera module 200 further includes a reinforcing rubber strip 8, and the reinforcing rubber strip 8 is adhered to one end of the flexible plate portion 64 connected to the rigid plate portion 63. The peripheral side 26 of the mirror base 2 is connected between the top face 21 of the mirror base 2 and the bottom face 24 of the mirror base 2. At this time, the reinforcing rubber 8 is bonded to the connecting region between the flexible plate portion 64 and the rigid plate portion 63. Because the stress when the flexible plate portion 64 is bent is easily concentrated on the connection region, the connection region is easily broken or damaged, and therefore the reinforcement rubber strip 8 is arranged to reinforce the strength of the connection region, the risk of damage to the connection region is reduced, and the service life of the camera module 200 is prolonged. The cross section of the reinforcing rubber strip 8 can be triangular to improve the reinforcing effect. In one embodiment, the reinforcing rubber 8 may be bonded to the rigid plate portion 63. In one embodiment, the reinforcing rubber 8 may further bond the flexible plate portion 64 to the peripheral side surface 26 of the lens holder 2.

Wherein the circuit board 6 further includes a connecting rigid plate portion 65. The connecting rigid plate portion 65 is hardly bent. The connecting rigid plate portion 65 is a rigid plate portion in the rigid-flex printed circuit board. The camera module 200 further includes an electrical connector 9 disposed on the connecting rigid plate portion 65. The electrical connector 9 may be part of Board-to-Board Connectors (Board-to-Board Connectors). Another part of the board-to-board connector may be fixed to the main board of the terminal 100. A reinforcing plate 66 is further attached to the surface of the connecting rigid plate portion 65 away from the electrical connector 9, and the reinforcing plate 66 is used for increasing the strength of the connecting rigid plate portion 65.

Optionally, referring to fig. 2 to 7, the lens barrel 1 includes a lens barrel 13 and a lens group 14 fixed inside the lens barrel 13. The lens group 14 can be fixed inside the lens barrel 13 by bonding to form an integrated lens. The bottom surface 11 of the lens 1 is formed on the lens 13. The number of the grooves 41 is plural, and the plural grooves 41 are arranged on the lens barrel 13 at intervals. The arrangement of the plurality of grooves 41 is matched with the arrangement of the plurality of protrusions 42, so that the plurality of protrusions 42 correspondingly extend into the plurality of grooves 41.

The lens group 14 is a plurality of lenses sequentially arranged at intervals along the optical axis 10 of the lens 1. And a space ring is arranged between the adjacent lenses. The space ring can keep the optical interval of the lens and can also ensure that the light path is within the same aperture range of the space ring. Of course, the spacer can also avoid the abrasion caused by the direct contact between two adjacent lenses. The spacer may be mylar (r) sheet, i.e., Polyethylene terephthalate (PET) film.

Optionally, the lens barrel 13 is provided with a vent 131. The vent hole 131 penetrates the lens barrel 13 in the direction parallel to the optical axis 10, and the vent hole 131 communicates with the through hole 23. When the lens 1 is bonded to the lens holder 2 through the bonding member 3, the air inside the lens barrel 13 and inside the vent hole 131 can be vented to the outside of the camera module 200 through the vent hole 131, so that the bonding process is smooth, and the assembly quality of the camera module 200 is improved.

As another alternative, referring to fig. 3 and 9, the lens 1 is provided with a first groove 43 and a second protrusion 44. The first groove 43 is recessed from the bottom surface 11 of the lens 1 toward the inside of the lens 1. The second protrusion 44 protrudes from the bottom surface 11 of the lens 1. The mirror base 2 is provided with a second groove 45 and a first projection 46. The second groove 45 is recessed from the top surface 21 of the mirror base 2 toward the inside of the mirror base 2. The first protrusion 46 protrudes from the top surface 21 of the mirror base 2. The first protrusions 46 extend into the first recesses 43 to form a set of the male and female mating structures 4. The second protrusions 44 extend into the second recesses 45 to form another set of the male and female mating structures 4. The main differences between this embodiment and the previous embodiments are: in all the concave-convex matching structures 4 included in the camera module 200 of this embodiment, the connection relationship between at least one group of the concave-convex matching structures 4 and the lens 1 (or the lens holder 2) is different from the connection relationship between other groups of the concave-convex matching structures 4 and the lens 1 (or the lens holder 2).

In this embodiment, two protrusions (44, 46) of the two sets of concave-convex matching structures 4 are respectively disposed on the lens 1 and the lens holder 2, and two grooves (43, 45) are also respectively formed on the lens 1 and the lens holder 2, so that the assembly strength of the camera module 200 is higher. Meanwhile, the positions and shapes of the first groove 43 and the second protrusion 44 can be flexibly designed according to the shape of the lens 1, and the positions and shapes of the first protrusion 46 and the second groove 45 can be flexibly designed according to the shape of the lens holder 2, so that the structural strength of a single component (namely, the lens 1 and the lens holder 2) and the overall strength of the assembled camera module 200 can be better considered.

It is understood that the fitting relationship between the first protrusion 46 and the first groove 43 and the fitting relationship between the second protrusion 44 and the second groove 45 in this embodiment can be designed with reference to the fitting relationship between the protrusion 42 and the groove 41 in the previous embodiment. The coordination relationships include, but are not limited to: the dimensional relationship. Similarly, other structures of the camera module 200 of this embodiment can be designed with reference to the camera module 200 of the previous embodiment, and the other structures include, but are not limited to: adhesive 3, a filter (not shown in fig. 9), a sensor chip 7, a circuit board 6, a reinforcing tape 8, and the like.

Referring to fig. 2 to 12, an embodiment of the present invention further provides a method for manufacturing a camera module, which can be used to manufacture the camera module 200 according to any of the foregoing embodiments. The manufacturing method of the camera module comprises the following steps:

step 001: as shown in fig. 10, an adhesive member 3' to be cured is formed on the top surface 21 of the lens holder 2 by dispensing.

Step 002: as shown in fig. 11, the lens 1 is assembled to the lens holder 2 such that the adhesive member 3' to be cured contacts the bottom surface 11 of the lens 1. Wherein a concave-convex matching structure 4 (not shown in fig. 11) is formed between the top surface 21 of the lens holder 2 and the bottom surface 11 of the lens 1.

Step 003: as shown in fig. 12, the adhesive member 3' to be cured is baked and cured to form the adhesive member 3.

Before step 001, the method for manufacturing the camera module 200 further includes: the circuit board 6 on which the sensor chip 7 is assembled is fixed to the bottom surface 24 of the mirror base 2. Before step 001, the method for manufacturing the camera module 200 further includes: the optical filter 5 is fixed in the through hole 23 of the lens base 2 by bonding. The lens 1 provided in step 002 is an integrated lens.

The embodiment of the application also provides a terminal which comprises the camera module in the embodiment.

The above description is only for the specific 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 the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A camera module is characterized by comprising a lens, a lens base and an adhesive piece, wherein the bottom surface of the lens is intersected with the optical axis of the lens, the bottom surface of the lens is fixedly connected with the top surface of the lens base through the adhesive piece, the bottom surface of the lens is positioned with the top surface of the lens base through a concave-convex matching structure, the adhesive piece is a rubber ring, and the adhesive piece continuously adheres the periphery of the bottom surface of the lens and the periphery of the top surface of the lens base;

the lens is provided with a groove, the groove is sunken from the bottom surface of the lens to the inside of the lens, the lens base is provided with a bulge, the bulge protrudes out of the top surface of the lens base, and the bulge extends into the groove to form the concave-convex matching structure; the raised top surface with form first clearance between the diapire of recess, the bellied all sides with form the second clearance between the week lateral wall of recess, protruding with bonding piece dislocation set.

2. The camera module according to claim 1, wherein the lens holder further comprises a plurality of through holes penetrating from the top surface of the lens holder to the bottom surface of the lens holder, and the plurality of protrusions are distributed around the through holes at intervals.

3. The camera module according to claim 2, wherein a limiting surface is disposed on a wall of the through hole, the limiting surface faces the lens, and the camera module further comprises a filter, the filter is received in the through hole and is fixedly connected to the limiting surface.

4. The camera module according to claim 2, further comprising a circuit board and a sensor chip fixed on the circuit board, wherein the circuit board is fixedly connected to a bottom surface of the lens holder, and the sensor chip is accommodated in the through hole.

5. The camera module of claim 4, wherein the circuit board comprises a rigid plate portion and a flexible plate portion, the rigid plate portion contacts the bottom surface of the lens holder, the flexible plate portion connects the rigid plate portion, the camera module further comprises a reinforcing rubber strip, and the reinforcing rubber strip is adhered to one end of the flexible plate portion connecting the rigid plate portion.

6. The camera module of claim 1, wherein the lens includes a lens barrel and a lens group fixed inside the lens barrel, the number of the grooves is plural, and the grooves are spaced on the lens barrel.

7. The camera module according to claim 6, wherein the lens base further has a through hole extending from the top surface of the lens base to the bottom surface of the lens base, and the lens barrel has a vent hole extending therethrough and communicating with the through hole.

8. The camera module according to claim 1, wherein the lens has a first recess and a second protrusion, the first recess is recessed from a bottom surface of the lens toward an inside of the lens, and the second protrusion protrudes from the bottom surface of the lens;

the microscope base is provided with a second groove and a first bulge, the second groove is sunken from the top surface of the microscope base to the interior of the microscope base, and the first bulge is protruded out of the top surface of the microscope base;

the first protrusion extends into the first groove to form one group of concave-convex matching structures, and the second protrusion extends into the second groove to form another group of concave-convex matching structures.

9. A terminal, characterized in that, includes the camera module of any one of claims 1-8.