CN106817515B

CN106817515B - Camera module and structure and assembling method thereof

Info

Publication number: CN106817515B
Application number: CN201510851990.4A
Authority: CN
Inventors: 梅哲文; 赵波杰; 王明珠
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2015-11-30
Filing date: 2015-11-30
Publication date: 2020-07-24
Anticipated expiration: 2035-11-30
Also published as: CN106817515A

Abstract

The camera module comprises a motor lens component and a circuit component; the motor lens member is positioned at the front side of the line assembly so that light passing through the motor lens member reaches the line assembly, and the motor lens member is welded to the line assembly. The camera module assembling method comprises the following steps: (A) dynamically adjusting a motor lens component; (B) welding the motor lens member to a circuit assembly.

Description

Camera module and structure and assembling method thereof

Technical Field

The invention relates to the field of camera modules, in particular to a camera module and a structure and an assembly method thereof.

Background

In recent years, with the rapid development of smart phones, the demand for mobile phone cameras is increasing, the competition of camera modules is fierce, and the structure and the performance of the camera modules are greatly developed.

The basic performance, structure and manufacturing process of the components of the camera module are important factors for determining the camera parameters of the camera module. Therefore, overall, the improvement of the camera module tends to be the three main aspects, which are related and influenced.

In the prior art, on one hand, basic performance of components, such as manufacturing materials, has been developed to a higher level, and the development period of new materials is longer and the cost is higher, which cannot keep up with the speed of updating the camera module, so the improvement on this aspect is difficult to be realized.

On the other hand, the camera module is a precise optical element, so that the manufacturing process determines the performance of each element and the superiority of the overall performance of the camera module to a certain extent. The AA (Active Alignment) process is an important process in the assembly process of the camera module, the resolution of the camera module can be improved through the AA process, and the overall quality of a product is improved. However, the application of the AA process brings with it a number of disadvantages.

Referring to fig. 1A and 1B, a camera module applying an AA process and an AA process flow in the prior art are shown. In the prior art, the camera module includes a motor lens subassembly 1P, a microscope base 2P and a circuit board 3P, microscope base 2P connect in circuit board 3P, motor lens subassembly 1P pass through glue fixed bonding in microscope base 2P, so that motor lens subassembly 1P's camera lens is located circuit board 3P's chip top. The AA technology is used for adjusting the camera module in the assembling process, so that the optical axis of the lens is consistent with the central axis of the chip, and the camera module has better optical performance.

In the prior art, the AA process mainly comprises the following steps: dynamic correction of the motor lens assembly → coating of AA glue → pre-curing of glue → curing by baking in an oven → scraping of surface glue overflow. Firstly, in order to meet the dynamic correction requirement of the motor lens assembly, a glue painting space which is wide enough is reserved on the lens base to ensure the coating of glue. The requirement for the camera module to have higher pixels and larger diameter is more and more, but the requirement for the glue painting space makes the adhesive surface of the lens base and the motor lens assembly difficult to reduce, so the existing structure obviously cannot meet the requirement for the camera module.

Secondly, because AA technology needs dynamic correction, reserves the drawing and glues the space, consequently need coat thicker glue than traditional card paying mode when AA glue coating, not only improved manufacturing cost, increased the degree of difficulty of glue yield management and control simultaneously. If the glue amount is too large, the product has serious glue overflow, the glue overflow needs to be scraped at the later stage, and the lens is easily stained; and if the glue volume is few, the bonding reliability of the camera module is poor, and the motor easily shakes or drops.

Thirdly, after the glue is coated, the camera module assembly is basically completed through two steps of glue pre-curing and oven baking curing, namely, the AA process, so that the overall process steps are more, a large amount of time is consumed, and the production efficiency is low.

Fourthly, due to the characteristics of the glue, on one hand, the bonding firmness is poor, and the glue is easy to loosen when being subjected to a large external force; on the other hand, the optical performance of the camera module is easily affected by the ambient temperature and is easily deformed when the temperature changes.

Therefore, for the AA glue assembly mode in the prior art, a plurality of adverse factors are generated while the performance of the camera module is improved through the AA technology, and the further development of the camera module is limited.

Disclosure of Invention

The invention aims to provide a camera module which is fixed in a welding mode to replace the existing glue bonding and fixing mode, so that the camera module has better bonding stability and stable optical performance.

Another objective of the present invention is to provide a camera module, which is fixed by welding, without reserving a wider glue coating space, so as to reduce the limitation of the structure on the size of the pixels and the diameter of the lens of the camera module, and easily obtain a camera module with high pixels and a large diameter lens.

Another objective of the present invention is to provide a camera module having a welding structure, which replaces the existing glue bonding structure, so that the camera module can be fixed by welding.

Another objective of the present invention is to provide a camera module having an elastic adjustment structure, so that the camera module has a sufficient adjustment space during the AA process and is elastically adjustable.

Another objective of the present invention is to provide a camera module with an elastic space embedded therein, so that no extra space is required to be reserved during the AA process, thereby reducing the size of the camera module.

Another objective of the present invention is to provide a camera module having a sealing structure, which replaces the glue sealing method, and has more stable and reliable sealing performance.

Another object of the present invention is to provide a method for assembling a camera module, which can simplify the assembling process and improve the production efficiency by assembling the camera module by welding.

Another objective of the present invention is to provide a camera module assembling method, which does not require a large AA adjustment space, so that the assembly is more convenient.

In order to achieve the above object, an aspect of the present invention provides a camera module, including: the motor lens component is positioned on the front side of the circuit assembly, so that light rays passing through the motor lens component reach the circuit assembly, and the motor lens component is welded on the circuit assembly.

According to an embodiment of the present invention, the camera module includes a soldering structure composed of a lead and a pad selectively disposed on the motor lens member and the wiring assembly to solder the motor lens member and the wiring assembly.

According to an embodiment of the present invention, the motor lens component of the camera module comprises a motor including at least one pin protruding and extending to a rear side of the motor for being welded to the circuit module.

According to an embodiment of the present invention, the motor lens component of the camera module includes a motor, which includes four pins, respectively located at four corners of the motor, protruding and extending toward the rear side of the motor for being welded to the circuit module.

According to an embodiment of the present invention, the circuit assembly of the camera module includes a circuit board, and the circuit board includes at least one pad corresponding to the position of the pin of the motor to provide the pin soldering position.

According to an embodiment of the present invention, the circuit assembly of the camera module includes a circuit board, and the circuit board includes four pads, which respectively correspond to the positions of the pins of the motor to provide the pin soldering positions.

According to an embodiment of the present invention, the pins of the camera module are fixed pins, located at the angular positions of the motor, integrally protruded and extended toward the rear side of the motor, and heat-welded to the circuit assembly.

According to an embodiment of the present invention, the pins of the camera module are circuit pins, and are electrically soldered to the circuit component.

According to an embodiment of the present invention, the camera module includes an adjustment structure disposed on the motor lens member, and the adjustment structure has elasticity such that the motor lens member can perform AA adjustment.

According to an embodiment of the present invention, the motor lens component of the camera module comprises an elastic member and a bottom plate, wherein the elastic member is connected between the motor and the bottom plate, so that the motor is elastically adjustable relative to the bottom plate.

According to an embodiment of the present invention, the camera module includes a set of elastic members and a bottom plate, and the elastic members are symmetrically disposed between the motor and the bottom plate, so that the motor is elastically adjustable with respect to the bottom plate under a balanced force.

According to an embodiment of the present invention, the camera module includes a sealing structure disposed between the motor lens member and the circuit module, so that the connection position of the motor lens member and the circuit module is sealed.

According to an embodiment of the present invention, the bottom plate of the camera module includes a first sealing element disposed at a rear side of the bottom plate to seal a position where the bottom plate is connected to the circuit assembly.

According to an embodiment of the present invention, the circuit assembly of the camera module includes a bracket including a second sealing member, which is engaged with the first sealing member to seal a position where the base plate is connected to the bracket.

According to an embodiment of the present invention, the first sealing member and the second sealing member of the camera module are disposed in a staggered manner to overlap and seal a position where the base plate meets the bracket.

Another aspect of the present invention provides a method for assembling a camera module, including the steps of:

(A) dynamically adjusting a motor lens component; and

(B) welding the motor lens member to a circuit assembly.

According to an embodiment of the present invention, the dynamic adjustment in the step (a) of the assembling method is a dynamic elastic adjustment.

According to an embodiment of the present invention, the step (a) of the assembling method includes the steps of: mounting a lens to a motor assembly, constituting the motor lens member.

According to an embodiment of the present invention, the step (a) of the assembling method includes the steps of: pre-placing the motor lens member onto the wiring assembly.

According to an embodiment of the present invention, the step (a) of the assembling method includes the steps of: sealing the position where the motor lens member and the line assembly meet.

According to an embodiment of the present invention, the step (B) of the assembling method includes the steps of: and fixing a bracket to a circuit board to form the circuit component.

According to an embodiment of the present invention, the welding manner of the step (B) in the assembling method is a heating welding manner.

According to an embodiment of the present invention, the welding manner of the step (B) in the assembling method is an electric welding manner.

According to an embodiment of the present invention, the welding manner of the step (B) in the assembling method is a laser welding manner.

According to an embodiment of the present invention, the welding manner of the step (B) in the assembling method is selected from: one of manual arc welding, gas metal arc welding and tungsten electrode argon arc welding.

Drawings

Fig. 1A is a schematic diagram illustrating adjustment of a camera module AA in the prior art.

Fig. 1B is a flow chart of a prior art camera module AA process.

Fig. 2 is a perspective view of a camera module according to a preferred embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view taken along line BB in fig. 2.

Fig. 4 is an exploded view of the camera module according to the above preferred embodiment of the present invention.

Fig. 5 is a welding structure of the camera module according to the above preferred embodiment of the present invention.

Fig. 6 is an adjustment structure of the camera module according to the above preferred embodiment of the present invention.

Fig. 7A and 7B are schematic diagrams of different-angle base plates of the camera module according to the above preferred embodiment of the present invention.

Fig. 8A and 8B are schematic views of different angle stands of the camera module according to the above preferred embodiment of the present invention.

Fig. 9 is an assembly view of the camera module according to the above preferred embodiment of the present invention.

Fig. 10 is a block diagram of a method of the camera module according to the above preferred embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

The optical performance of the camera module is an important aspect influencing the camera quality of the camera module, the consistency of the optical axes of the components is a basic factor influencing the optical performance, and the AA technology is an important mode for correcting the consistency of the optical axes of the camera module. It can be known from the foregoing that there are many disadvantages in the AA process and the corresponding camera module structure in the prior art. The AA dynamic calibration makes the optical axes consistent, which is an extremely favorable aspect for the optical performance of the camera module in the AA process, while the AA glue pasting and fixing manner causes many adverse factors, and the implementation of a process manner, such as glue pasting, is closely related to the structure, that is, the existing camera module is suitable for the glue pasting manner. Glue pastes fixed mode, plays the effect of fixed module of making a video recording on the one hand, and on the other hand, the sealed module of making a video recording in glue coating pasting position. Therefore, to replace the glue pasting method, camera modules with different structures are needed, so that the AA correction can be performed and the adverse factors are reduced. The camera module according to the preferred embodiment of the present invention provides a fixing method different from a glue attaching method in the prior art, and accordingly, provides a structure different from the prior camera module, so that various adverse factors caused by the glue attaching method can be avoided while applying AA adjustment.

Referring to fig. 2 to 9, a camera module according to a preferred embodiment of the present invention includes a lens 10, a motor assembly 20 and a circuit assembly 30, wherein the motor assembly 20 is mounted on the circuit assembly 30, and the lens 10 is mounted on the motor assembly 20, such that the lens 10 is located at a front side of the circuit assembly 30. It is understood that the camera module further includes a light sensing chip connected to the circuit assembly 30 for receiving light from the light passing through the lens 10.

It is to be noted that, for clarity of description, the front and rear sides of the respective components are defined: the incident direction of the light along the camera module is defined as the rear side, and the incident direction of the backlight is defined as the front side. That is, if one element has two sides in the optical axis direction, the side facing the light incidence is the front side, and the opposite side, i.e., the direction facing away from the light incidence, is the rear side.

According to an embodiment of the present invention, the motor assembly 20 is welded to the front side of the line assembly 30, so that the motor assembly 20 is stably connected to the line assembly 30, and the lens 10 mounted to the motor assembly 20 is stably positioned at the front side of the line assembly 30 without easily changing the position. The motor assembly 20 is a structure with a through center, and is suitable for mounting the lens 10, so that when the lens 10 is mounted on the motor assembly 20, the lens 10 is driven by the motor assembly 20 to rotate, and the focusing and other work is completed.

The lens 10 is mounted on the motor assembly 20 to form a motor lens member, and the motor lens member and the circuit board are adjusted by AA and then welded to the circuit assembly 30 to assemble the camera module.

Referring to fig. 2 to 5, the motor assembly 20 includes a motor 21, the lens 10 is mounted on the motor 21, and the motor 21 is located at the front side of the circuit assembly 30, so that the lens 10 is located at the front side of the circuit assembly 30 and the light entering through the lens 10 reaches the circuit assembly 30.

The motor 21 includes at least one pin 211 at a rear position of the motor 21 and protruding in a rear direction of the motor 21 to be adapted to be soldered to the wire assembly 30. That is, the pins 211 provide a location where the motor assembly 20 is soldered to the wire assembly 30, so that the motor assembly 20 is conveniently connected to the wire assembly 30 in a soldered manner.

In the prior art, referring to fig. 1A, the motor lens assembly 1P of the camera module is fixed to the lens holder 2P, and then connected to the circuit board 3P through the lens holder 2P. That is, the motor lens assembly 1P and the circuit board 3P are not directly connected to each other, and the motor lens assembly 1P is supported by the lens holder 2P and fixed by means of glue. The structure and the connection mode of the present invention are different from those of the camera module in the prior art, and the structure and the fixing mode are changed, and the pins 211 enable the motor assembly 20 to be connected to the circuit assembly 30 in a welding mode instead of bonding with glue. The wiring assembly 30 provides both a mounting and support for the motor assembly 20 in a manner that avoids many of the disadvantages associated with glue bonding. The welding connection mode breaks through original structure, breaks through the restriction of original fixed mode to the structure simultaneously, motor 21 need not reserve the drawing of broad and glue the space and just can realize motor 21 with fixed between the line subassembly 30, consequently easily obtain the module of making a video recording of different sizes and high performance, for example the module of making a video recording of high pixel, major diameter.

According to an embodiment of the present invention, the motor 21 includes four pins 211 symmetrically distributed at four corners of the motor 21, so that the motor assembly 20 can be stably fixed to the circuit board assembly 30.

According to an embodiment of the present invention, the pin 211 of the motor 21 is a fixed pin, integrally extends along a rear direction at an angular position of the motor 21, and extends to a position protruding from a rear side of the motor 21, so as to provide a position where the motor assembly 20 is welded. When the motor assembly 20 is manufactured, the pin 211 of the motor assembly 20 may be integrated by molding the motor assembly in one piece. In another embodiment, the pins 211 may be provided to the motor 21 by a separate addition. That is, the lead 211 is separately manufactured, and the lead 211 is fixed to the motor 21.

According to another embodiment of the present invention, the pin 211 of the motor 21 is a circuit pin, and the circuit pin is a circuit pin having a predetermined welding circuit, and when the welding circuit of the circuit pin is energized, the pin 211 can be directly welded to the wire assembly 30. That is, the welding action is directly accomplished without the action of an external tool, so that the manufacturing process is more convenient and faster.

Referring to fig. 3 and 4, the circuit module 30 includes a bracket 31 and a circuit board 32, the bracket 31 is fixed to the front side of the circuit board 32, and the motor module 20 is connected to the front side of the bracket 31. That is, the bracket 31 is positioned between the motor assembly 20 and the circuit board 32. Further, the holder 31 has a hollow penetrating structure, so that light passing through the lens 10 mounted to the motor assembly 20 passes through the holder 31 to reach the circuit board 32.

According to an embodiment of the present invention, the bracket 31 is fixed to the circuit board 32 by gluing, that is, during the assembly and manufacturing process of the camera module, the bracket 31 and the circuit board 32 are independent from each other, and the bracket 31 is fixedly connected to the circuit board 32 by a gluing and fixing process. In other embodiments of the present invention, the bracket 31 and the circuit board 32 may have other connection modes.

Referring to fig. 3, 4 and 9, the camera module further includes a color filter 40, and the color filter 40 is mounted on the bracket 31. The holder 31 has a hollow penetrating structure, and the color filter 40 covers the hollow portion of the holder 31 so as to be positioned on the front side with respect to the wiring board 32. That is, the light entering through the lens 10 is transmitted to the wiring board 32 by the color filtering action of the color filter 40. In an embodiment of the present invention, the bracket 31 has a protruding structure suitable for mounting the color filter 40, the color filter 40 is not easy to mount due to the light and thin sheet structure, and the protruding structure of the bracket 31 facilitates the mounting of the color filter, supporting the color filter on the front side of the circuit board 32.

The circuit board 32 has a photosensitive area, which is located at the front side of the circuit board 32, and the light of the lens 10 enters the corresponding position. In the AA adjustment process, it is the main adjustment matter to adjust the position of the main optical axis of the lens 10 to be consistent with the central axis of the photosensitive area of the circuit board 32. Therefore, the main optical axis of the lens 10 of the camera module adjusted by AA is consistent with the central axis of the photosensitive area of the circuit board 32. The light rays incident through the lens 10 firstly pass through the color filtering function of the color filter 40 and then reach the photosensitive area of the circuit board 32, and through the photosensitive function, the circuit board 32 collects the image information shot by the lens 10 through the light ray information.

Referring to fig. 4, 5 and 9, the circuit board 32 is provided with at least one pad 321, and the position of the pad 321 corresponds to the position of the pin 211 of the motor 21 of the motor assembly 20, so as to solder the pin 211 to the pad 321. According to an embodiment of the present invention, the circuit board 32 is provided with four pads 321, which are respectively located at four corners of the circuit board 32, and the four corners correspond to the positions of the pins 211 of the motor 21 of the motor assembly 20. That is, four solder points formed by soldering are provided at four corners of the camera module where the motor assembly 20 and the circuit board 32 meet. When the camera module is manufactured, a welding material needs to be coated at the position of the bonding pad or the position of the motor pin to complete the welding process, so that a welding point is welded at the position where the pin 211 is connected with the bonding pad 321.

In other words, the motor pins 211 of the motor 21 of the motor assembly 20 and the pads 321 of the circuit board 32 constitute a soldering structure, by which the motor assembly 20 and the circuit board 32 are soldered. It should be understood by those skilled in the art that the shapes and positions of the soldering pins 211 of the motor 21 and the soldering pads 321 of the circuit board 32 are shown by way of example only and not limitation, and other shapes and positions may be adopted in other embodiments of the present invention to facilitate the connection of the motor 21 and the circuit board by soldering.

It should be noted that, as will be understood by those skilled in the art, the shape and position of the pins 211 and the pads 321 are not a limitation of the present invention, and are not limited to the shape and position shown in the drawings. In other embodiments of the present invention, the pins 211 and the pads 321 constituting the soldering structure are selectively provided to the motor assembly 20 and the line assembly 30. That is, the pins 211 may be disposed on the motor assembly or the line assembly 30, and the pads 321 may be disposed on the motor assembly or the line assembly 30. For example, when the pin 211 is disposed on the motor assembly 20, the pad 321 is disposed on the circuit assembly 30; when the pins 211 are disposed on the circuit component 30, the pads 321 are correspondingly disposed on the motor component 20, so that the motor component 20 can be soldered to the circuit component 30 through the soldering structure in different manners.

Referring to fig. 3, 4, 7A, 7B, 8A, and 8B, the motor assembly 20 includes a base plate 22 at a rear position of the motor 21 according to an embodiment of the present invention. The base plate 22 includes a first sealing member 221 located at the rear side of the base plate 22. Accordingly, the holder 31 includes a second sealing member 311 at a front side of the holder 31. The first sealing element 221 of the base plate 22 corresponds to the second sealing element 311 of the bracket 31, so that the camera module is sealed and external impurities are prevented from entering the camera module.

In one embodiment of the present invention, the first sealing element 221 of the bottom plate 22 is a square ring closed structure, which is adapted to the shape of the bottom plate 22. Correspondingly, the second sealing element 311 of the bracket 31 is a square ring closed structure, which is adapted to the shape of the bracket 31. And the first sealing element 221 and the second sealing element 311 are matched to surround between the motor assembly 20 and the bracket 31, so that external impurities cannot enter the camera module from the position between the motor assembly 20 and the bracket 31. In one embodiment of the present invention, the first sealing element 221 of the bottom plate 22 and the second sealing element 311 of the bracket 31 are both rubber sealing rings. The first sealing member 221 is fixedly attached to the rear side of the bottom plate 22, and the second sealing member 311 is fixedly attached to the front side of the bracket 31.

In other words, the first sealing member 221 of the base plate 22 and the second sealing member 311 of the bracket 31 form a sealing structure that seals the coupling position between the motor assembly 20 and the bracket 31. Through the sealing structure replaces the mode of glue sealing in the prior art, sealing can be realized without applying glue, the process of glue curing and forming is also not needed, the process steps are reduced, and meanwhile, the reliable stability of sealing is improved.

According to an embodiment of the present invention, the sealing structure formed by the first sealing element 221 of the bottom plate 22 and the sealing element 321 of the bracket 31 is in a form of inside-outside nesting. That is, the second sealing member 311 is located inside the first sealing member 221, and the first sealing member 221 and the second sealing member 311 form a double seal, thereby providing better sealing between the motor assembly 20 and the line assembly 30.

In the prior art, the motor lens assembly 1P is fixed to the lens holder 2P by gluing, and in this way, the glue has two functions, on one hand, the motor lens assembly 1P and the lens holder 2P are fixedly connected by the glue, and the relative position of the motor lens assembly 1P and the lens holder 2P is determined, so that the optical performance of the camera module after the AA adjustment is stable; on the other hand, since a clean environment needs to be maintained inside the camera module, and other positions of the motor lens assembly 1P and the lens holder 2P are sealed, sealing the position between the motor lens assembly 1P and the lens holder 2P is an important link for ensuring the internal environment of the camera module, and glue is located between the connection positions of the motor lens assembly 1P and the lens holder 2P, and by utilizing the characteristics of the glue, in the process of connecting the motor lens assembly 1P and the lens holder 2P by the solidification of the glue, the connection space between the two is sealed at the same time. And in order to ensure good fixing firmness and sealing performance, a large amount of glue is needed for gluing. According to the preferred embodiment of the present invention, the structure of the camera module is different from the prior art, but the camera module with better firmness, stability and good sealing performance can be obtained. On the one hand, welded structure between motor element 20 and the circuit element 30 makes motor element 20 with circuit element 30 replaces current glue mode of pasting through the welded mode, assembles more firmly and stably the module of making a video recording, and the welded mode has better environmental stability, is difficult for influencing the fastness because the length of environment or live time, makes motor element 20 with relative position between circuit element 30 is difficult for producing the change to keep better optical axis uniformity, reduce the influence of structure to the pixel simultaneously, have good optical property, avoided because of drawing the not enough design limit that leads to the fact in gluey space or the problem of unable design. And the welding has good stability and reliability, and solves the problem that the thrust of the motor and the bracket at present does not reach the standard. On the other hand, the sealing structure formed between the base plate 22 and the bracket 31 is engaged with the welding structure so as to seal the connection position between them when the motor assembly 20 and the line assembly 30 are joined. The sealing structure replaces a glue sealing mode, so that a large amount of glue does not need to be applied for sealing, the sealing performance is stable and easy to control, and meanwhile, the use of the glue is saved. Therefore, the welding structure and the sealing structure not only replace the existing glue pasting mode, but also provide a novel structure and a novel fixing mode matched with the novel structure, so that the structure is matched with the assembling mode.

Referring to fig. 3, 4, 6 and 9, according to an embodiment of the present invention, the motor assembly 20 includes at least one elastic member 23 disposed between the motor 21 and the bottom plate 22 to provide an elastic movement space for the motor 21. In the process of assembling the camera module, the position of the motor assembly 20 is adjusted to make the optical axis of the lens 10 mounted on the motor assembly 20 coincide with the central axis of the photosensitive area of the circuit board 32 during AA adjustment and during an important step thereof. The AA adjustment is primarily adjustable in two ways, one in the horizontal direction and the other in the axial direction. Therefore, it is necessary to provide a space in which the motor 21 can be adjusted. According to this embodiment of the present invention, the elastic component 23 is disposed between the motor 21 and the bottom plate 22, and is elastically stretchable in a space, which is equivalent to the motor assembly 20 itself providing a movable space, and during the AA adjustment process, the relative position between the motor 21 and the circuit board 32 is freely adjusted within the elastic range of the movable adjustment space, so that the optical axes of the lens 10 and the light-sensing area of the circuit board 32 are consistent.

Referring to fig. 3, 4, 6 and 9, the motor assembly 20 includes a set of elastic members 23 symmetrically disposed between the motor 21 and the base plate 22 to balance elastic supporting force between the motor 21 and the base plate 22. The set of elastic members 23 is located inside the housing structure of the motor 21, that is, the adjustment space is located inside the housing structure of the motor 21.

In other words, the elastic member 23 of the motor assembly 20 forms an adjustment structure that provides an adjustment space for the motor 21 during AA adjustment, so that the motor 21 can be conveniently adjusted without providing an additional adjustment space. It should be noted that the adjusting structure is an elastic structure located between the motor 21 and the bottom plate 22 and located inside the casing structure of the motor 21, so that the internal space of the motor 21 is fully utilized, the overall size of the camera module can be reduced while providing an adjusting space, unlike the prior art, a large AA adjusting space needs to be reserved between the motor lens assembly 1P and the lens holder 2P, and more glue needs to be consumed to satisfy the adjusting space.

In the process of assembling the camera module, the motor assembly 20 is assembled to the front side of the circuit assembly 30, and the sealing structures of the bottom plate 22 and the bracket 31 are matched, so that the camera module is sealed. The elastic component 23 provides a space for dynamically adjusting the motor 21, that is, dynamically adjusts the motor 20, so that the optical axis of the lens 10 mounted on the motor 201 is consistent with the central axis of the photosensitive area of the circuit board 32, thereby completing the AA dynamic adjustment process, i.e., obtaining the camera module with consistent optical axis. And then welding the motor 21 and the circuit board 32 at the welding positions corresponding to the pins 211 and the bonding pads of the circuit board 32, and determining the relative positions of the motor 21 and the circuit board 32 to obtain the camera module.

Referring to fig. 1 to 10, according to the above embodiment of the present invention, the present invention provides a method 1000 for assembling a camera module, the method comprising the steps of:

1100: (A) dynamically adjusting a motor lens component; and

1200: (B) the motor lens member is welded to a circuit assembly 30.

Referring to fig. 1B, in the prior art, the basic process flow of the AA assembling process of the camera module is as follows: dynamic correction of the motor lens assembly → coating of AA glue → pre-curing of glue → curing by baking in an oven → scraping of surface glue overflow. According to the method of the invention, the AA assembly process flow of the camera module is as follows: dynamic correction → welding. Compared with the prior art, the method has the advantages that the steps of glue coating, pre-curing, baking and the like are not needed, the production process is simplified, the production time is greatly shortened, and the production efficiency is improved.

In the step (a), the motor lens component, that is, the dynamic adjustment process of the AA process, is dynamically adjusted, and the relative position of the motor lens component and a circuit board is adjusted, so that the lens optical axis of the motor lens component is consistent with the central axis of the photosensitive area of the circuit board. In the method of the present invention, the adjustment space required for dynamic adjustment is an elastically variable adjustment space provided by the elastic member 23. Thus, the dynamic adjustment of step (a) is a dynamic elastic adjustment.

The dynamic adjustment includes horizontal adjustment and axial adjustment, and in the horizontal direction, the central position of the motor lens component and the central position of the circuit component 30 are both on the central axis of the camera module, and the sub-axis is on the axis, so that the main optical axis of the motor lens component and the central axis of the circuit component 30 are consistent and have no included angle.

Further, in the step (a), the motor lens member may be an integral member composed of a lens 10 and a motor assembly 20, and directly welded to the circuit board assembly of the step (B). Or a member composed of a lens and a motor assembly which are separated from each other. Thus, said step (a) comprises the steps of: mounting a lens to a motor assembly, constituting the motor lens member.

Prior to dynamic adjustment, it is necessary to pre-position the motor lens element to a circuit assembly such that the motor lens element is initially positioned above the circuit assembly 30 to facilitate the dynamic adjustment process. Thus step (a) comprises pre-placing the motor lens member onto the wiring assembly.

In the prior art, since the fixing is performed by means of adhesion, a large adjustment space needs to be reserved between the motor lens assembly 1P and the lens holder 2P during AA adjustment. In the method of the present invention, an additional adjustment space is not required to be reserved between the motor lens component and the circuit assembly, and the adjustment space is provided by the elastic component 23 of the motor assembly 20 and is located inside the shell structure of the motor assembly 20, so that the arrangement of the original glue painting space position is eliminated, the process difficulty is reduced, and the volume of the camera module is reduced.

It is worth mentioning that, since the motor lens component and the circuit assembly 30 have the matched sealing structure, the sealing structure achieves the function of primarily sealing the motor lens component and the circuit assembly 30 during the process of placing the motor lens component in the circuit assembly 30, unlike the prior art in which a large amount of glue is applied to the motor lens assembly 1P and the lens holder 2P bracket, and the sealing process is completed after the glue is cured. The step (A) comprises the steps of: sealing the position where the motor lens member and the line assembly meet.

In the step (B), the pin 211 of the motor 21 of the motor lens member provides a soldering position so that the motor lens member can be soldered to the line assembly 30. The circuit board 32 of the circuit assembly 30 provides pad locations corresponding to the locations of the pins 211 of the motor 21, forming a solder structure.

In the soldering in the step (B), the pins 211 of the motor 21 and the wiring board 32 may be soldered by applying heat to the positions of the pins 211 of the motor 21 or the positions of the pads of the wiring board 32 by applying tin. In another embodiment, for a camera module with circuit pins, the pins can be directly powered on, so that the pins 211 of the motor 21 are soldered to the circuit board 32.

It should be noted that in other embodiments of the present invention, the motor 21 and the pin 211 can be welded in a variety of different manners, such as, but not limited to, laser welding. In another embodiment, the welding mode may be selected from the group consisting of: one of manual arc welding, gas metal arc welding and tungsten electrode argon arc welding.

The circuit module 30 may be an integral module formed by the holder 31 and the circuit board 32, in which case the motor lens member may be directly soldered to the circuit module. In another embodiment, the circuit module 30 is a module formed by the bracket 31 and the circuit board 32 which are independent from each other, and in this case, the bracket 31 needs to be fixed to the circuit board 32, and therefore, the step (B) includes the steps of: a bracket 31 is fixed to a circuit board 32, constituting the circuit module 30. In one embodiment, the bracket 31 may be fixed to the circuit board 32 by means of adhesion.

Comparing the AA process method of the invention with the AA process of glue pasting in the prior art, the invention has the following advantages:

①, the design feasibility is improved, the welding mode does not need a wider glue space, and the problem of design limit or design incapability caused by insufficient glue space is avoided;

②, the production speed is high, the welding process speed is high, pre-curing and baking are not needed, the production time is greatly shortened, and the production process is simplified;

③, the fixing reliability is good, the fixing strength is high by adopting a welding mode, and the problem that the thrust of the motor and the base does not reach the standard at present is solved;

④, the welding consistency is good, the yield is high, the positions after welding are fixed, the mutual positions can not change, and the problems of poor module consistency, low resolving power and focusing image paste caused by shrinkage after baking glue at present are solved;

⑤, the production is cleaner, AA glue is not needed for bonding, the generation of uneven gluing or poor glue overflow is eliminated, and the production is clean and pollution-free;

⑥ reduces the production cost by not using oven to bake, reduces the electricity consumption, and simultaneously eliminates the consumption of consumables and AA glue.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. A camera module, comprising:

a circuit assembly;

a motor lens component, the motor lens component comprises a motor, the motor comprises four pins which are respectively and symmetrically distributed at four corners of the motor, the pins protrude and extend towards the rear side of the motor at the corner positions of the motor so as to be welded on the circuit component in a mode of keeping consistency of optical axes;

the motor lens component is positioned on the front side of the circuit assembly, so that light rays passing through the motor lens component reach the circuit assembly, and the motor lens component is welded and fixed on the circuit assembly through four pins; and

and a welding structure composed of the pin and a pad, the pin and the pad being selectively arranged between the motor lens component and the circuit assembly, wherein the motor lens component and the circuit assembly are connected and kept fixed through the welding structure.

2. The camera module of claim 1, wherein the circuit assembly includes a circuit board including at least one of the pads corresponding to a location of the pin of the motor to provide the pin bonding location.

3. The camera module of claim 2, wherein the wiring board includes four of the pads, each corresponding to a location of the pin of the motor to provide the pin bonding location.

4. The camera module according to claim 1, wherein the pin is a fixed pin, is located at an angular position of the motor, integrally protrudes and extends toward a rear side of the motor, and is heat-welded to the wiring member.

5. The camera module of claim 1, wherein the pin is a circuit pin that is electrically soldered to the circuit component.

6. The camera module of claim 1, comprising an adjustment structure disposed on the motor lens member, the adjustment structure having a flexibility to allow the motor lens member to be automatically adjusted for alignment.

7. The camera module of claim 1, wherein the motor lens member includes a resilient member and a base plate, the resilient member being coupled between the motor and the base plate such that the motor is resiliently adjustable relative to the base plate.

8. The camera module of claim 1, comprising a set of resilient members and a base plate, the resilient members being symmetrically disposed between the motor and the base plate such that the motor is resiliently adjustable in a balanced force relationship with respect to the base plate.

9. The camera module of claim 6, including a seal structure disposed between the motor lens member and the wiring assembly to seal the interface of the motor lens member and the wiring assembly.

10. The camera module of claim 7, wherein the base plate includes a first sealing member disposed on a rear side of the base plate to seal a position where the base plate is coupled to the circuit assembly.

11. The camera module of claim 10, wherein the wiring assembly includes a bracket including a second sealing member that cooperates with the first sealing member to seal the position at which the base plate meets the bracket.

12. The camera module of claim 11, wherein the first and second sealing members are disposed in an offset position to overlappingly seal the position where the base plate meets the bracket.

13. A camera module assembly method is characterized by comprising the following steps:

(A) dynamically adjusting a motor lens component, wherein the motor lens component comprises a motor, the motor comprises four pins which are respectively and symmetrically distributed at four corners of the motor, and the pins protrude and extend towards the rear side of the motor at the corner positions of the motor so as to be welded on a circuit assembly in a manner of keeping the consistency of optical axes; and

(B) and welding and fixing the motor lens component to the circuit assembly through four pins, wherein the pins and a pad form a welding structure, the pins and the pad are selectively arranged on the motor lens component and the circuit assembly, and the motor lens component and the circuit assembly are connected and kept fixed through the welding structure.

14. The method of assembling of claim 13, wherein the dynamic adjustment of step (a) is a dynamic elastic adjustment, and the motor lens member includes an elastic member and a base plate, the elastic member being connected between the motor and the base plate such that the motor is elastically adjustable relative to the base plate.

15. The assembling method according to claim 13, wherein the step (a) includes the steps of: mounting a lens to a motor assembly, constituting the motor lens member.

16. The assembling method according to claim 13, wherein the step (a) includes the steps of: pre-placing the motor lens member onto the wiring assembly.

17. The assembling method according to claim 13, wherein the step (a) includes the steps of: sealing the position where the motor lens member and the line assembly meet.

18. The assembling method according to claim 17, wherein the step (B) comprises the steps of: and fixing a bracket to a circuit board to form the circuit component.

19. The assembly method of claim 17, wherein the welding of step (B) is by heat welding.

20. The assembly method according to claim 17, wherein the welding manner of the step (B) is an electric welding manner.

21. The assembly method according to claim 17, wherein the welding manner of the step (B) is a laser welding manner.

22. The method of assembling of claim 17, wherein the welding of step (B) is selected from the group consisting of: one of manual arc welding, gas metal arc welding and tungsten electrode argon arc welding.