CN119471942A

CN119471942A - Lens assembly, camera module and electronic equipment

Info

Publication number: CN119471942A
Application number: CN202310940092.0A
Authority: CN
Inventors: 周鹏飞; 赵波杰; 长田宽志; 请求不公布姓名; 陈凯
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2023-07-28
Filing date: 2023-07-28
Publication date: 2025-02-18
Also published as: WO2025026188A1

Abstract

The present invention discloses a lens assembly, comprising: a housing, an accommodating cavity is provided inside and a base defining at least a part of the accommodating cavity; an optical lens is constrained inside the accommodating cavity in a manner that it can move along its optical axis, and comprises a lens barrel and a lens assembled in the lens barrel, the outer peripheral surface of the lens barrel is provided with a boss, the boss has a first surface and a second surface opposite to each other along the optical axis, the first surface is adjacent to the light input end of the optical lens, and the second surface is adjacent to the light output end of the optical lens; a bracket comprising a mounting portion and a first bearing portion, the mounting portion is fixed to the first surface of the boss through a connecting structure, the first bearing portion is located on the side of the boss, and there is a gap between the first bearing portion and the side wall of the boss; a driving mechanism is provided between the base and the first bearing portion to drive the bracket and the optical lens to move along the optical axis. The present invention also relates to a camera module using the above-mentioned lens assembly, and also relates to an electronic device using the above-mentioned camera module.

Description

Lens assembly, camera module and electronic equipment

Technical Field

The present invention relates to an image capturing apparatus, and more particularly, to a lens assembly, an image capturing module using the lens assembly, and an electronic apparatus using the image capturing module.

Background

In recent years, electronic products, intelligent devices, and the like are increasingly being developed toward miniaturization and high performance, and such development trend of the electronic products, the intelligent devices has put more stringent demands on the size and imaging capability of an imaging module, which is one of standard configurations of the electronic products, the intelligent devices. The electronic product and intelligent equipment industries are not required to pursue the compact type and the functional integration of the camera module, and the automatic focusing, zooming and anti-shake functions are integrated into the camera module in the development wave, so that the automatic focusing, zooming and anti-shake functions of the camera module are realized.

Currently, existing camera modules generally include photosensitive components, optical lenses, and voice coil motors. The voice coil motor is used as a driving element of the camera module and mainly comprises a motor base, a lens carrier movably restrained on the motor base, and a coil and a magnet which are oppositely arranged between the motor base and the lens carrier, wherein the coil is arranged on the motor base and the magnet is arranged on the lens carrier, or the magnet is arranged on the motor base and the coil is arranged on the lens carrier. The lens carrier is provided with the mounting hole for the optical lens to be mounted therein, and the lens carrier is driven to move through the thrust generated between the coil and the magnet based on the electromagnetic principle, so that the optical lens is driven to move, and the functions of automatic focusing, zooming, anti-shake and the like of the camera module are realized.

Some camera modules cancel the lens carrier, and directly locate the coil or magnet on the outer peripheral surface of the lens barrel, so as to reduce the assembly tolerance between the optical lens and the lens carrier, cancel the height setting process in the traditional packaging process, simplify the assembly process, avoid the problems of Gao Bu good and dirty glue and the like which are easily generated in the traditional height setting process, and reduce the height of the camera module.

In the above-mentioned camera module with the lens carrier removed, the coil is usually wound by an enameled wire, which is shrunk when being shaped by hot air baking in the winding process, and the magnet is usually attached to the lens barrel by glue, so that the mounting of the coil or the magnet on the lens barrel usually involves baking shaping after assembly, and the mounting mode of the coil or the magnet causes the coil or the magnet to directly apply force on the periphery of the lens barrel. However, since the lens barrel of the optical lens is generally made of thermoplastic resin such as polyamide, polycarbonate, etc., the lens barrel is easily deformed after being subjected to stress and baking after being mounted with the coil or the magnet, thereby causing deformation of the lens mounting hole in the lens barrel, further causing deformation of the peripheral side edge of the optical lens due to extrusion, leading to a large field curvature fluctuation unstable range of the optical lens and a large MTF value, and thus affecting the imaging performance of the optical lens.

In addition, with the development of electronic products, the requirements for miniaturization and thinness of the camera module are increasing. Taking the camera module of the mobile phone as an example, because the mobile phone is more and more light and thinner in modeling, the requirement on the thickness dimension of the camera module is mainly met, and as for the front camera module, along with the improvement of the screen occupation ratio of the mobile phone, the lens of the front camera module can be attached to the edge of the screen of the mobile phone as much as possible.

Disclosure of Invention

The invention has the advantages that the lens component is provided, the pressure bearing direction of the lens barrel of the optical lens during integrated assembly is changed, the deformation of the lens mounting hole in the lens barrel can be avoided to the greatest extent, the deformation phenomenon of the peripheral edge of the lens is improved, the field curvature fluctuation unstable range and the MTF value of the optical lens can be reduced, and the imaging performance of the optical lens is improved.

Another advantage of the present invention is to provide a lens assembly that can avoid an overheat environment during the integrated assembly process, so that the deformation of the lens mounting hole is less likely to be caused by the integrated assembly.

The invention further provides a lens assembly, and the distance between the bearing part of the lens barrel and the lens mounting hole is further, so that the lens mounting hole is not easy to deform due to integrated assembly.

The invention further has the advantages that the lens component is provided, the area of the bearing part of the lens barrel is larger, the pressure born by the bearing part of the lens barrel is smaller, and the lens mounting hole is not easy to deform due to integrated assembly.

An advantage of the present invention is to provide a camera module, which not only simplifies the assembly process, but also allows for a thinner design and/or a narrower edge, thereby reducing the size of the model module and facilitating the miniaturized design of the camera module.

An advantage of the present invention is to provide an image capturing module that can reduce the inclination of an optical lens due to unavoidable machining tolerances, thereby reducing the inclination angle of the optical lens.

An advantage of the present invention is to provide an image capturing module that can reduce the inclination of an optical lens during an integrated assembly process, thereby reducing the inclination angle of the optical lens.

To achieve at least one of the above or other advantages and objects, the present invention provides a lens assembly comprising:

The shell is internally provided with a containing cavity, and comprises a base which defines at least a partial containing cavity;

An optical lens which is restrained in the interior of the accommodating cavity in a manner of being capable of moving along an optical axis of the optical lens, and comprises a lens barrel and a lens assembled in the lens barrel, wherein the outer peripheral surface of the lens barrel is provided with a boss, the boss is provided with a first surface and a second surface which are opposite in the optical axis direction, the first surface is adjacent to the light inlet end of the optical lens, and the second surface is adjacent to the light outlet end of the optical lens;

The bracket comprises a mounting part and a first bearing part, wherein the mounting part is fixed on the first surface of the boss through a connecting structure, and the first bearing part is positioned at the side of the boss and is provided with a gap with the side wall of the boss;

the driving mechanism is arranged between the base and the first bearing part of the bracket so as to drive the bracket and the optical lens to move along the optical axis.

In some embodiments of the invention, the support is made of metal.

In some embodiments of the invention, the first bearing portion of the bracket extends from the mounting portion side edge toward the orientation of the second surface of the boss.

In some embodiments of the present invention, a guiding mechanism is disposed between a side wall of the first bearing portion of the bracket and/or the boss corresponding to the first bearing portion of the bracket and the base.

In some embodiments of the present invention, the guiding mechanism includes a guiding portion and a guiding groove that are disposed opposite to each other, and a guiding member that is clamped between the guiding portion and the corresponding guiding groove, the base extends along the optical axis direction to form a supporting column, the guiding portion is disposed on the supporting column, and the guiding groove is disposed on the first bearing portion of the bracket.

In some embodiments of the present invention, the guiding mechanism includes a guiding portion and a guiding groove that are disposed opposite to each other, and a guiding member that is clamped between the guiding portion and the guiding groove, the base extends along the optical axis direction to form a supporting column, the guiding portion is disposed on the supporting column, and the guiding groove is disposed on a side wall of the boss corresponding to the first bearing portion of the bracket.

In some embodiments of the present invention, the connecting structures have at least three groups, and the three groups of connecting structures are not in the same line, so as to be suitable for the mounting portion of the bracket to be mounted on the boss of the optical lens in a flat manner.

In some embodiments of the present invention, the boss of the optical lens and the mounting portion of the bracket are riveted by a cold riveting process.

In some embodiments of the invention, the connecting structure is adjacent to a sidewall of the boss.

In some embodiments of the present invention, the mounting portion of the bracket is annular and has a central hole, and the first surface of the boss is provided with at least one first stop portion, where the at least one first stop portion is located in the central hole of the mounting portion of the bracket and protrudes out of the bracket.

In some embodiments of the invention, the mounting portion of the bracket is provided with a notch on a side facing away from the first carrying portion, wherein one of the first stop portions is located in the notch.

In some embodiments of the invention, the mounting portion of the bracket covers 60-70% of the first surface area.

In some embodiments of the present invention, the base has a light window for the light of the optical lens to pass through the accommodating cavity, and a color filter is disposed at the light window.

In some embodiments of the invention, the magnetic element is mounted on the first bearing portion of the bracket, the side portion of the base is provided with a first circuit board, and the coil is electrically connected to the first circuit board.

According to another aspect of the present invention, the present invention further provides an image capturing module, wherein the lens assembly as described above is applied, the base is provided with a photosensitive assembly located outside the accommodating cavity, and the optical lens is located on a photosensitive path of the photosensitive assembly.

According to another aspect of the present invention, there is further provided an image capturing module, wherein the lens assembly as described above is applied, the base is provided with a photosensitive assembly located outside the accommodating cavity, and the optical lens is located on a photosensitive path of the photosensitive assembly;

The base is provided with an annular shoulder, a central hole of the shoulder forms the light window, the shoulder is provided with a first side part and a second side part which are opposite, the first side part is adjacent to the first bearing part of the bracket, the second side part is far away from the first bearing part of the bracket, and the width of the first side part is larger than that of the second side part.

the base is provided with an annular shoulder, a central hole of the shoulder forms the light window, the shoulder is provided with a first side part and a second side part which are opposite, the first side part is adjacent to the first bearing part of the bracket, the second side part is far away from the first bearing part of the bracket, and the width of the first side part is larger than that of the second side part;

The base is recessed towards the inside of the accommodating cavity, the recess is positioned between the side wall of the base corresponding to the first bearing part and the first side part, and the recess is positioned below the coil.

According to another aspect of the present invention, the electronic device is further provided, and the electronic device is characterized by comprising a body, wherein the camera module is installed on the body.

Further objects and advantages of the present invention will become fully apparent from the following description and the accompanying drawings.

These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the appended claims.

Drawings

Fig. 1 is a perspective view of an image capturing module according to embodiment 1 of the present invention.

Fig. 2 is a top view of an image capturing module according to embodiment 1 of the present invention.

Fig. 3 is a cross-sectional view in the direction A-A of fig. 2.

Fig. 4 is a sectional view in the direction B-B in fig. 2.

Fig. 5 is a perspective view of a lens assembly according to embodiment 1 of the present invention.

Fig. 6 is a perspective view showing the lens assembly of embodiment 1 of the present invention with the cover removed.

Fig. 7 is an exploded perspective view of a lens assembly in embodiment 1 of the present invention.

Fig. 8 is a cross-sectional view of an image pickup module in embodiment 2 of the present invention.

Fig. 9 is a perspective view showing the lens assembly of embodiment 3 of the present invention with the cover removed.

Fig. 10 is an exploded perspective view of a lens assembly in embodiment 3 of the present invention.

Detailed Description

The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the invention 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.

It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present invention.

In the present invention, the terms "a" and "an" in the claims and specification should be understood as "one or more", i.e. in one embodiment the number of one element may be one, while in another embodiment the number of the element may be plural. The terms "a" and "an" are not to be construed as unique or singular, and the term "the" and "the" are not to be construed as limiting the amount of the element unless the amount of the element is specifically indicated as being only one in the disclosure of the present invention.

In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, unless explicitly specified and limited otherwise, the terms "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected, mechanically connected or electrically connected, or directly connected or indirectly connected through a medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Summary of the application

The first bearing part of the bracket is positioned at the side of the boss and is provided with a gap with the side wall of the boss, so that the first bearing part of the bracket can isolate the part of the driving mechanism from the peripheral surface of the optical lens, the local installation of the driving mechanism can avoid the deformation of a lens mounting hole in the lens barrel caused by the radial extrusion of the lens barrel, and further the deformation of the peripheral edge of the lens caused by the extrusion, and the mounting part of the bracket is fixed on the first surface of the boss through a connecting structure, so that the mounting part of the bracket is applied to the boss of at least a local area of the periphery of the lens in the optical axis direction, the pressure bearing direction of the lens barrel of the optical lens is changed, the deformation of the lens mounting hole in the lens barrel in the process of fixedly connecting the bracket with the optical lens can be avoided to the greatest extent, the deformation phenomenon of the peripheral edge of the lens caused by the local installation of the driving mechanism can be avoided, the fluctuation range of the curvature of field of the optical lens can be reduced, the MTF value can be further improved, and the imaging performance of the optical lens can be improved.

The application provides a lens assembly, which comprises a shell, an optical lens, a driving mechanism and a support, wherein the shell is internally provided with a containing cavity, the shell comprises a base which is used for limiting at least partial containing cavity, the optical lens can move along an optical axis of the optical lens and is limited in the containing cavity, the optical lens comprises a lens barrel and a lens assembled in the lens barrel, the outer circumferential surface of the lens barrel is provided with a boss, the boss is provided with a first surface and a second surface which are opposite in the optical axis direction, the first surface is adjacent to the light inlet end of the optical lens, the second surface is adjacent to the light outlet end of the optical lens, the support comprises a mounting part and a first bearing part, the mounting part is fixed on the first surface of the boss through a connecting structure, and a gap is reserved between the first bearing part and the side wall of the boss, and the driving mechanism is arranged between the base and the first bearing part of the support so as to drive the support and the optical lens to move along the optical axis.

Based on the above, the application also provides an image pickup module using the lens assembly, wherein the base is provided with a light window for the light of the optical lens to pass through the accommodating cavity, the light window is provided with a color filter, the base is provided with a photosensitive assembly positioned outside the accommodating cavity, and the optical lens is positioned on a photosensitive path of the photosensitive assembly.

It should be noted that, the conventional camera module further includes a lens base, and the color filter is usually mounted on the lens base, and the lens base is thicker. Therefore, the image pickup module of the application eliminates the lens base and mounts the color filter on the base, which not only reduces the assembly process, but also reduces the thickness of the image pickup module and makes the image pickup module thinner.

The application also provides an image pickup module using the lens assembly, wherein the base is provided with a photosensitive assembly positioned outside the accommodating cavity, the optical lens is positioned on a photosensitive path of the photosensitive assembly, the base is provided with an annular shoulder, a central hole of the shoulder forms the light window, the shoulder is provided with a first side part and a second side part which are opposite, the first side part is adjacent to the first bearing part of the bracket, the second side part is far away from the first bearing part of the bracket, and the width of the first side part is larger than that of the second side part.

Because of the existence of the first bearing part of the bracket, the camera shooting module is wider at the side part where the first bearing part of the bracket is positioned. According to the application, the first side part of the annular shoulder part is arranged adjacent to the first bearing part of the bracket, the second side part of the annular shoulder part is designed to be far away from the first bearing part of the bracket, and the width of the first side part is larger than that of the second side part, so that the first side part of the shoulder part can be used for accommodating a photosensitive chip and/or an electronic component (such as a capacitor and a resistor) and/or a conductive part (such as a gold wire for electrically connecting the chip and the second circuit board) in the photosensitive assembly, the space of the camera module on the side part of the first bearing part of the bracket is fully utilized, the second side part of the shoulder part can occupy a smaller space of the camera module, namely, the electronic component (such as the capacitor and the resistor) and/or the conductive part (such as the gold wire for electrically connecting the chip and the second circuit board) are not placed on the second side part of the shoulder part, and the position of the camera module corresponding to the second side part is designed to be extremely narrow, and the size of the camera module in the direction perpendicular to the optical axis is further reduced, the camera module is enabled to meet the requirements of a front camera head of electronic equipment such as a mobile phone or a flat panel camera module, and the electronic mobile phone is more suitable for being used as a front camera module of the camera equipment.

In addition, the application also provides electronic equipment with the camera module, which comprises a body, wherein the camera module is arranged on the body and is used for acquiring images. The type of the body of the electronic device is not limited, and for example, the body of the electronic device may be any electronic device capable of being configured with the camera module, such as a smart phone, a tablet computer, a notebook computer, an electronic book, a personal digital assistant, a camera, and the like. And when the body of the electronic equipment is a smart phone or a tablet personal computer, the camera module can be used as a front camera module and/or a rear camera module.

Illustrative embodiments

Example 1

As shown in fig. 1 to 7, a first preferred embodiment of the present invention is shown. For convenience of description, the width direction of the camera module is defined as the X-axis. The length direction of the camera module is the Y axis. The thickness direction of the camera module (i.e., the extending direction of the optical axis) is the Z axis. It can be understood that the coordinate system setting of the camera module can be flexibly set according to specific actual requirements.

As shown in fig. 1 to 3, the image capturing module in this embodiment includes a lens assembly 100 and a photosensitive assembly 9. The lens assembly 100 is located on the photosensitive path of the photosensitive assembly 9, so that the external light passes through the lens assembly 100 and is then received by the photosensitive assembly 9 for imaging.

As shown in fig. 3, the lens assembly 100 in the present embodiment includes a housing, an optical lens 2, a holder 3, and a driving mechanism. The interior of the housing is provided with a receiving cavity 10 and the housing comprises a base 1 defining a partial receiving cavity 10. The optical lens 2 is constrained inside the accommodation chamber 10 in such a manner as to be movable along its optical axis (i.e., the Z-axis direction shown in fig. 1), and the optical lens 2 includes a lens barrel (not shown) and a lens (not shown) assembled in the lens barrel (not shown). It will be appreciated that a lens mounting hole (not shown) is provided in the barrel (not shown) and the lens (not shown) is mounted in the lens mounting hole (not shown). The invention does not limit the number of lenses, and can reasonably set the types and arrangement modes of the lenses according to imaging requirements.

As shown in fig. 3, 6 and 7, the outer peripheral surface of the lens barrel (not labeled in the drawings) is provided with a boss 21, the boss 21 has a first surface 21a and a second surface 21b opposite to each other in the optical axis direction (i.e., the Z-axis direction shown in fig. 1), the first surface 21a is adjacent to the light entrance end 2a of the optical lens 2, and the second surface 21b is adjacent to the light exit end 2b of the optical lens 2. The bracket 3 includes a mounting portion 31 and a first bearing portion 32, the mounting portion 31 being fixed to the first surface 21a of the boss 21 by a connecting structure, the first bearing portion 32 being located laterally of the boss 21 with a gap X from a side wall of the boss 21. The gap X is in the range of 0.2 to 0.3mm. The driving mechanism is disposed between the base 1 and the first bearing portion 32 of the bracket 3 to drive the bracket 3 and the optical lens 2 to move along the optical axis.

It should be noted that, in the "the first bearing portion 32 is located at a side of the boss 21 and has a gap X with the sidewall of the boss 21", when the boss 21 has a structure in which the sidewall includes a curved surface, "sidewall of the boss 21" refers to a corresponding region of the sidewall of the boss 21, and when the boss 21 has a structure in which the sides of the boss 21 are all planar, "sidewall of the boss 21" refers to a corresponding sidewall of the boss 21. In the present embodiment, the side wall of the boss 21 is a plane, and the "side wall of the boss 21" is one side surface of the boss 21 in the Y-axis direction (as shown in fig. 3 and 6).

In the lens assembly 100 of the present embodiment, the first bearing portion 32 of the bracket 3 is additionally provided to support a part of the driving mechanism, and since the first bearing portion 32 of the bracket 3 is located at a side of the boss 21 and has a gap X with a side wall of the boss 21, the first bearing portion 32 of the bracket 3 can isolate the part of the driving mechanism from an outer peripheral surface of the optical lens 2, so that it is possible to avoid deformation of a lens mounting hole (not shown) in the lens barrel (not shown) due to radial extrusion of the lens barrel (not shown) by partial mounting of the driving mechanism, and further to avoid deformation of a peripheral edge of the lens (not shown) due to extrusion, and further to improve the compression-bearing performance of the lens (not shown) in the lens barrel (not shown) by the lens mounting hole (not shown) in the driving mechanism in a maximum extent (not shown) of the optical lens 2, and to thereby prevent the mounting portion 31 of the bracket 3 from being fixed to the first surface 21a of the boss 21 in the optical axis direction, so that the mounting portion 31 of the bracket 3 is forced to the boss 21 in the optical axis direction, and the bearing direction of the lens (not shown) of the lens 2 is changed, and the bearing direction of the lens mounting of the lens (not shown) in the maximum extent (not shown) is prevented, and the deformation of the lens barrel (not shown) in the optical lens 2) is prevented, thereby the deformation is prevented, and the deformation of the peripheral edge of the optical lens can be stable due to the optical field is prevented.

The lens barrel (not shown) of the optical lens barrel 2 in the prior art is generally made of thermoplastic resin such as polyamide, polycarbonate, etc., so that the lens barrel (not shown) is easily deformed by stress and baking after the driving mechanism is partially installed. The bracket 3 can be made of a material with mechanical properties and heat resistance superior to those of a lens barrel (not labeled in the figure), such as metal or liquid crystal high polymer, so that the bracket 3 has better supporting performance and is not easy to deform due to stress or heating, thereby the bracket 3 can provide more powerful support for part of a driving mechanism. The support 3 in this embodiment is made of metal material such as stainless steel (sus 316L), and can make the thickness of the support 3 thinner while meeting the requirements of the support 3 on the support performance and heat resistance, so as to avoid the great influence of stacking of the support 3 on the optical lens 2 on the thickness of the camera module, and make the thickness of the camera module still reduced compared with the traditional voice coil motor.

As shown in fig. 3 and 7, the first bearing portion 32 of the bracket 3 extends from an edge of one side of the mounting portion 31 toward an orientation (Z-axis in fig. 1) where the second surface 21b of the boss 21 is located, and the first bearing portion 32 can play a main role in supporting when the Y-axis direction of the camera module is vertical. Further, the bracket 3 further includes a second bearing portion 33, where the second bearing portion 33 extends from an extending end of the first bearing portion 32 toward an orientation (Z-axis in fig. 1) away from a corresponding side wall of the boss 21, so that the second bearing portion 33 can play a main role in supporting when the Z-axis direction of the camera module is vertical. It is understood that the included angle between the mounting portion 31 and the first bearing portion 32, and the included angle between the first bearing portion 32 and the second bearing portion 32 are not limited, and may be a right angle, an obtuse angle, or an acute angle, and in this embodiment, the included angle between the mounting portion 31 and the first bearing portion 32, and the included angle between the first bearing portion 32 and the second bearing portion 32 are all 90 °.

The processing procedure of the bracket 3 comprises the steps of metal base material, punching, bending, scrap cutting and finished product, wherein the first bearing part 32 and the second bearing part 33 are formed in the bending procedure. The bracket 3 only needs to be bent twice to form the integral structure of the bracket 3, so that the processing of the bracket 3 is simpler and more convenient, and the processing of the bracket 3 does not involve bending of two parallel components, thereby ensuring that the optical lens 2 has smaller inclination angle, namely the tilt of the camera module is smaller. Because of the machining tolerances which are unavoidable during machining, it is difficult to maintain a high degree of parallelism for the two bent parallel components. If the bracket 3 is connected with the boss 21 of the optical lens 2 through two members with lower parallelism, the optical axis of the optical lens 2 is easy to skew relative to the photosensitive chip 92 of the photosensitive assembly 9, so that the inclination angle of the optical lens 2 is larger, i.e. the tilt of the camera module is larger.

The connection structure in this embodiment includes a first rivet hole (not shown in the drawing), a second rivet hole 313, and a rivet 5. The first rivet hole (not shown) is formed in the first surface 21a of the boss 21, the second rivet hole 313 is formed in the mounting portion 31 of the bracket 3, and the rivet 5 is inserted through the first rivet hole (not shown) and the second rivet hole 313, so that the mounting portion 31 of the bracket 3 is riveted with the boss 21 of the optical lens 2. Considering that the design of the rivet holes is prone to dust entering to affect the imaging of the optical lens 2, the connecting structure in this embodiment further includes glue (such as shadowless glue) filled between the first rivet holes (not shown in the figure) and the rivets 5, and between the second rivet holes 313 and the rivets 5. Since the caulking is classified into cold caulking and hot caulking, wherein cold caulking refers to caulking performed in a normal temperature state of the rivet 5. The hot riveting is carried out by improving the temperature to denature or even melt the connecting parts of the two metals, and the final riveting temperature of the rivet 5 is 450-600 ℃ according to the different materials of the rivet 5. In this embodiment, the boss 21 of the optical lens 2 is riveted with the mounting portion 31 of the bracket 3 through a cold riveting process, so that the overheated rivet 5 is avoided forming an overheated environment during the assembly process of the optical lens 2 and the bracket 3, and the boss 21 of the optical lens 2 is melted to deform, so that the deformation of a lens mounting hole (not labeled in the figure) inside the lens barrel (not labeled in the figure) is not easily caused, and the optical performance of the optical lens 2 is better.

As shown in fig. 6 and 7, the connecting structure has at least three groups, and the three groups of connecting structures are not on the same straight line, and the connecting structure is used as a connecting site of the optical lens 2 and the bracket 3, and since the three connecting sites can define a plane, the mounting part 31 of the bracket 3 is suitable for being flatly mounted on the boss 21 of the optical lens 2. In this embodiment, the outer contour of the boss 21 is rectangular, and the connecting structure has four groups and is located at four corners of the boss 21 respectively. The specific structural design and the number design of the connecting structure can enable the connection between the optical lens 2 and the support 3 to be firmer, and the reliability to be better, so that when the electronic equipment provided with the camera module falls, the connecting structure is not easy to lose efficacy, the anti-falling and anti-falling performances of the camera module are better, the mounting part 31 of the support 3 can be flatter due to the distribution design of the connecting structure, the optical lens 2 is not easy to incline relative to the photosensitive assembly 9, the inclination angle (i.e. tilt of the optical lens 2 is smaller) can be reduced, and the stress of the optical lens 2 is more balanced.

Since force is inevitably applied to the boss 21 of the optical lens 2 during the caulking process, each connection structure in the present embodiment is adjacent to the side wall of the boss 21. The "the connecting structure is adjacent to the side wall of the boss 21" means that the distance between the connecting structure and the side wall of the boss 21 is smaller than the distance between the connecting structure and the corresponding part of the lens mounting hole (not labeled in the figure) edge of the lens barrel (not labeled in the figure). Since the connecting structure is far away from the lens mounting hole (not shown) of the lens barrel (not shown), the acting force applied by the rivet 5 to the boss 21 of the optical lens 2 is not easy to deform the lens mounting hole (not shown) of the lens barrel (not shown), and the influence of the riveting process on the imaging performance of the optical lens 2 can be reduced.

As shown in fig. 6, since the mounting portion 31 of the bracket 3 inevitably comes into contact with the first surface 21a of the boss 21, the mounting portion 31 of the bracket 3 applies pressing toward the second surface 21b to the boss 21. In this embodiment, the mounting portion 31 of the bracket 3 is annular, so that the contact area between the mounting portion 31 of the bracket 3 and the first surface 21a of the boss 21 can be increased, and the pressure borne by the boss 21 can be reduced, so that the connection between the bracket 3 and the optical lens 2 is not easy to deform a lens mounting hole (not shown) of a lens barrel (not shown in the figure), and the influence of the mounting portion 31 of the bracket 3 on the imaging performance of the optical lens 2 is reduced. Since the outer contour of the boss 21 is rectangular, the mounting portion 31 of the bracket 3 is adaptively designed in a rectangular ring shape. Further, the mounting portion 31 of the bracket 3 covers 60-70% of the area of the first surface 21a, so that the contact area between the bracket 3 and the boss 21 is large enough, and the influence of excessive weight of the bracket 3 on the movement sensitivity of the optical lens 2 can be avoided.

As shown in fig. 3 and 5, the housing further includes a cover 7 covering the outside of the base 1, the cover 7 and the base 1 together form the accommodating cavity 10, and the cover 7 is provided with a through hole 71 corresponding to the optical lens 2. It is understood that the optical lens 2 may participate in the assembly process of the camera module 1 before the cover 7, that is, in the embodiment of the present application, after the cover 7 is assembled on the outer side of the base 1, the optical lens 2 is not required to be installed in the accommodating cavity 10 of the base 1 through the through hole 71, so that the aperture of the through hole 71 of the cover 7 can be reduced to be smaller than the size of the light emitting end 2b of the optical lens 2.

As shown in fig. 4,6 and 7, the first surface 21a of the boss 21 is provided with 4 first stopping portions 211 protruding from the bracket 3, and each of four side directions of the boss 21 is provided with one first stopping portion 211, so that when the optical lens 2 moves upwards in the Z-axis, each first stopping portion 211 can contact with the inner surface of the cover 7, thereby limiting the range of upward movement of the optical lens 2 in the Z-axis. Wherein 3 first stops 211 are located in the central hole 311 of the mounting portion 31 of the bracket 3. The mounting portion 31 of the bracket 3 is provided with a notch 312 on a side of the Y-axis facing away from the first bearing portion 32, and one of the first stop portions 211 is located in the notch 312.

In this embodiment, by locating 3 first stop portions 211 in the central hole 311 of the mounting portion 31 of the bracket 3, the mounting portion 31 of the bracket 3 is entirely closer to the side wall of the boss 21, so that the pressing force applied by the bracket 3 to the boss 21 is further away from the corresponding portion of the edge of the lens mounting hole (not shown in the figure), and the lens mounting hole (not shown in the figure) is less likely to deform. The notch 312 is formed in the stamping process, so that stress can be released for subsequent processing steps such as bending and scrap cutting, the whole flatness of the mounting portion 31 of the bracket 3 is prevented from being reduced due to deformation of the bracket 3, the whole flatness of the mounting portion 31 of the bracket 3 is enabled to be higher, the extrusion force of the bracket 3 to the boss 21 is enabled to be more balanced, the optical lens 2 is not easy to incline, the tilt of the camera module is smaller, the position of the notch 312 is designed, the first stop portion 211 on the corresponding side can be avoided, the occupation of the space on the corresponding side on the Y axis can be reduced, the corresponding side on the Y axis can be allowed to be designed into an extremely narrow side by the camera module, the size on the Y axis of the camera module is shortened, the miniaturization of the camera module is facilitated, and the camera module is suitable for being used as a front camera module.

As shown in fig. 7, the base 1 is provided with 4 second stopping portions 13, which are distributed at four corners of the base 1, so that when the optical lens 2 moves downward along the Z axis, the second stopping portions 13 can limit the movement of the optical lens 2 downward along the Z axis.

As shown in fig. 4, 6 and 7, the driving mechanism includes a coil 41 and a magnetic element 42 which are disposed opposite to each other. The number of the magnetic elements 42 is two, and both are magnets. The magnetic element 42 is mounted on the first bearing part 32 and the second bearing part 33 of the bracket 3, specifically, the magnetic element 42 is adhered on the first bearing part 32 and the second bearing part 33 of the bracket 3, and the bracket 3 is not easy to deform due to the excellent pressure bearing performance and high temperature resistance of the bracket 3, and the magnetic element 42 can be attracted with the bracket 3 due to the magnetic attraction, so that the magnetic element 42 is more firmly mounted, and the anti-falling performance of the camera module is better. The side of the base 1 is provided with a first wiring board 6, and the coil 41 is electrically connected to the first wiring board 6, thereby supplying power to the coil 41. The coil 41 is a hollow planar coil, and is mounted on the first circuit board 6. The coil 41 and the magnetic element 42 are disposed opposite to each other, so that after the coil 41 is energized, the electromagnetic force generated by the coil 41 and the magnetic element 42 drives the magnetic element 42 to drive the bracket 3 to move along the optical axis, and further drive the optical lens 2 to move along the optical axis.

As shown in fig. 4, 6 and 7, a guide mechanism is provided between the first bearing portion 32 of the holder 3 and the base 1, so as to guide the movement of the optical lens 2 in the optical axis direction thereof. The two sets of guide mechanisms are spaced apart in a direction substantially perpendicular to the optical axis, and in this embodiment are disposed on opposite sides of the magnetic element 42 in the X-axis direction. Each set of guide mechanisms includes a guide portion 121 and a guide groove 101 that are disposed opposite to each other, and a guide 8 that is sandwiched between the guide portion 121 and the corresponding guide groove 101. The outer contour of the base 1 is rectangular, the two corner positions of the base 1 are respectively provided with a support column 12, each support column 12 extends along the optical axis direction (i.e. the Z-axis direction), and a guiding portion 121 is formed on one side surface of each support column 12, which is close to the optical lens 2, in the Y-axis direction, and the guiding portion 121 is a U-shaped groove. The first bearing portion 32 is elongated and disposed along the X-axis direction, and a U-shaped guiding groove 101 is punched at two ends of the first bearing portion 32. The guide 8 is a ball, and the number of balls in each guide mechanism is 2.

It is noted that, in the conventional ball guiding mechanism, the guiding portion and the guiding groove are made of plastic, and the balls are usually made of ceramic, so that the guiding piece 8 can cause scraps on the inner walls of the guiding portion and the guiding groove due to friction in the rotating process, and the scraps are very easy to pollute the lens of the optical lens 2 and the photosensitive assembly 9, so that the imaging quality of the optical lens 2 is affected, the service life of the imaging module is shortened, meanwhile, pits are also easily formed on the inner walls of the guiding portion and the guiding groove, so that the ball installation gap between the guiding portion and the guiding groove is increased, at least two balls are easy to be misplaced in the X-axis direction or the Y-axis direction, and the scraps are easy to enter between the balls, so that the rotation of the balls is blocked, and further the blocking phenomenon is easy to occur in the movement of the optical lens 2. In this embodiment, the guide groove 101 is directly formed in the first bearing portion 32 of the bracket 3, so that the guide piece 8 and the inner wall of the guide groove 101 cannot generate scraps during friction, scraps generated in the use process of the guide mechanism can be reduced, the probability that the optical lens 2 and the photosensitive assembly 9 of the camera shooting module are polluted by scraps in the use process is greatly reduced, the imaging quality of the optical lens 2 is not easily affected, the service life of the camera shooting module can be prolonged, and the optical lens 2 moves more smoothly. In addition, the guide groove 101 is formed by a stamping process, so that the processing is simple and convenient, and the processing tolerance is not easy to accumulate, so that the bracket 3 is prevented from being inclined due to the processing tolerance, and the optical lens 2 is not easy to incline relative to the photosensitive assembly 9.

The first circuit board 6 in this embodiment is a flexible circuit board (Flexible Printed Circuit, abbreviated as FPC), and the first circuit board 6 is fixed to the two support columns 12 by the magnetic attraction members 61. Specifically, each support column 12 is provided with a unfilled corner 122 on a side surface facing away from the optical lens 2 along the Y-axis direction, the magnetic attraction between the magnetic attraction piece 61 and the magnetic element 42 is adsorbed on a side surface facing away from the optical lens 2 along the Y-axis direction on the first circuit board 6, and under the action of the pressing action of the magnetic attraction piece 61, two ends of the first circuit board 6 respectively abut against the corresponding unfilled corners 122, so that the first circuit board 6 is fixed on the base 1. In this embodiment, the magnetic attraction member 61 is made of a magnetic conductive material, such as stainless steel (SUS 430), so as to play a certain role in magnetic conduction, strengthen the magnetic field, and make the magnetic attraction between the magnetic attraction member 61 and the magnetic element 42 stronger.

As shown in fig. 3 and 7, the base 1 is provided with an annular shoulder 11, and a central hole of the shoulder 11 forms an optical window 111, and the optical window 111 allows light of the optical lens 2 to pass through the accommodating cavity 10. The shoulder surface of the shoulder 11 is attached with a color filter 112 at the light window 111 to eliminate the lens holder, and the color filter 94 is directly mounted on the base 1, so that not only the assembly process can be reduced, but also the elimination of the lens holder can reduce the thickness of the image pickup module.

As shown in fig. 3 and 7, the photosensitive assembly 9 includes a second wiring board 91, a photosensitive chip 92, and an electronic component 93. The second circuit board 91 is attached to the base 1 and located outside the accommodating chamber 10, and the first circuit board 6 is provided with solder fillets (not shown) electrically connected to the second circuit board 91, thereby electrically connecting the second circuit board 91 to the coil 41. The photosensitive chip 92 is mounted on the second circuit board 91 and electrically connected to the second circuit board 91 (for example, the photosensitive chip 92 is electrically connected to the second circuit board 91 by wire bonding), so as to provide the control circuit and the electric energy required by the operation for the photosensitive chip 92 through the second circuit board 91. At least the photosensitive area of the photosensitive chip 92 is opposite to the optical window 111, so that the photosensitive chip 92 can receive light from the optical lens 2. The electronic component 93 is a capacitor or a resistor.

As shown in fig. 3 and 7, the shoulder 11 of the base 1 has a first side 11a and a second side 11b opposite to each other along the Y axis direction, the first side 11a is adjacent to the first bearing 32 of the support 3, the second side 11b is far away from the first bearing 32 of the support 3, and the width of the first side 11a is greater than that of the second side 11b, so that the first side 11a of the shoulder 11 can accommodate the photosensitive chip 92 and/or the electronic component 93 (such as a capacitor and a resistor) and/or the conductive member (such as a gold wire electrically connecting the chip and the second circuit board) in the photosensitive assembly 9, the space of the camera module on the side of the support 3 where the first bearing 32 is located is fully utilized, and the second side 11b of the shoulder 11 can occupy a smaller space of the camera module, i.e.e. the electronic component 93 (such as a capacitor and a resistor) and/or the conductive member (such as a gold wire electrically connecting the chip and the second circuit board) are not placed on the second side 11b, thereby allowing the design of a position corresponding to the second side 11b in the module to be more easily narrowed in the direction of the camera module, such as a flat-panel camera module or a mobile phone, so that the size of the camera module can be more easily reduced in the front of the camera module or the tablet device.

The electronic device in this embodiment is a mobile phone, and includes a body, where the body is provided with the aforementioned camera module, and the camera module is used as a front camera module, that is, the light incident end 2a of the optical lens 2 in the camera module faces the front side of the electronic device.

Example 2

As shown in fig. 8, a second preferred embodiment of the present invention.

The difference between this embodiment and embodiment 1 is that the base 1 is recessed toward the inside of the accommodating cavity 10 with a recess 14, the recess 14 is located between the sidewall corresponding to the first carrying portion 32 and the first side portion 11a on the base 1, and the recess 14 of the base 1 is located below the coil 41, so that the recess 14 can accommodate the electronic component 93 therein. The design of the recess 14 can also reduce the size of the Y-axis of the image pickup module, and the recess 14 can also reduce the thickness of the image pickup module (i.e., the size in the Z-axis direction) by avoiding the position of the magnetic element 42, but because the recess 14 occupies the installation space of the coil 41, the number of turns of the coil 41 is limited, and there is a risk of affecting the driving force of the movement of the optical lens 2.

Example 3

As shown in fig. 9 and 10, a third preferred embodiment of the present invention.

The present embodiment differs from embodiment 1 in that the boss 21 is provided with a convex portion 212 on the side of the Y-axis adjacent to the first bearing portion 32 of the holder 3. The number of the protrusions 212 is two, and the protrusions are provided at intervals along the X-axis on the side wall of the boss 21. Each guide groove 101 is formed on the corresponding convex portion 212. Since the boss 21 is injection-molded, the accuracy of the guide groove 101 formed by the boss 21 is higher than that of the guide groove 101 directly molded on the first bearing portion 32 of the bracket 3. The middle part all is equipped with baffle 213 in each guide slot 101, and each baffle 213 divides corresponding guide slot 101 into two sub-grooves, all is equipped with a guide 8 in each sub-groove to make each guide 8 roll in corresponding sub-groove, so as to avoid two balls 8 in each guide slot 101 all to concentrate and lie in the one end of guide slot 101 and lead to support 3 to take place the slope, thereby make the tilt of optical lens 2 less.

As shown in fig. 10, in the present embodiment, the first carrying portion 32 of the bracket 3 has a first side and a second side opposite to each other in the X-axis direction, and the first side and the second side of the first carrying portion 32 of the bracket 3 are respectively provided with a third carrying portion 34, and the third carrying portion 34 plays a main role in supporting the magnetic element 42 when the X-axis direction of the camera module is vertical. It can be appreciated that, since the two third bearing portions 34 are not directly connected to the boss 21, even if the parallelism of the two third bearing portions 34 is low due to unavoidable machining tolerances, the tilting of the bracket 3 is not easily caused, that is, the tilt of the camera module is not easily increased.

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

Claims

1. A lens assembly (100), characterized in that it comprises:

A housing having an accommodating cavity (10) disposed therein, wherein the housing comprises a base (1) defining at least a portion of the accommodating cavity (10);

An optical lens (2) is constrained inside a housing cavity (10) in a manner that it can move along its optical axis, and the optical lens (2) comprises a lens barrel and a lens assembled in the lens barrel, wherein a boss (21) is provided on the outer peripheral surface of the lens barrel, and the boss (21) has a first surface (21a) and a second surface (21b) opposite to each other along the optical axis direction, the first surface (21a) is adjacent to a light input end (2a) of the optical lens (2), and the second surface (21b) is adjacent to a light output end (2b) of the optical lens (2);

The bracket (3) comprises a mounting portion (31) and a first bearing portion (32), wherein the mounting portion (31) is fixed to a first surface (21a) of the boss (21) via a connecting structure, and the first bearing portion (32) is located on the side of the boss (21) and has a gap (X) with the side wall of the boss (21);

The driving mechanism is arranged between the base (1) and the first bearing portion (32) of the bracket (3) to drive the bracket (3) and the optical lens (2) to move along the optical axis.

2. The lens assembly (100) according to claim 1, characterized in that the bracket (3) is made of metal.

3. The lens assembly (100) as described in claim 2 is characterized in that, wherein, the first bearing portion (32) of the bracket (3) extends from an edge of one side of the mounting portion (31) toward the direction where the second surface (21b) of the boss (21) is located.

4. The lens assembly (100) as described in claim 2 is characterized in that a guiding mechanism is provided between the first bearing portion (32) of the bracket (3) and/or the side wall of the boss (21) corresponding to the first bearing portion (32) of the bracket (3) and the base (1).

5. The lens assembly (100) as described in claim 4 is characterized in that, wherein the guiding mechanism includes a guiding portion (121) and a guiding groove (101) arranged opposite to each other, and a guiding member (8) clamped between the guiding portion (121) and the guiding groove (101), the base (1) is provided with a supporting column (12) extending along the optical axis direction, and the guiding portion (121) is arranged on the supporting column (12), and the guiding groove (101) is arranged on the first bearing portion (32) of the bracket (3).

6. The lens assembly (100) as described in claim 4 is characterized in that, wherein the guiding mechanism includes a guiding portion (121) and a guiding groove (101) arranged opposite to each other, and a guiding member (8) clamped between the guiding portion (121) and the guiding groove (101), the base (1) is provided with a supporting column (12) extending along the optical axis direction, and the guiding portion (121) is arranged on the supporting column (12), and the guiding groove (101) is arranged on a side wall of the boss (21) corresponding to the first bearing portion (32) of the bracket (3).

7. The lens assembly (100) as described in claim 1 is characterized in that, there are at least three groups of connecting structures, and the three groups of connecting structures are not on the same straight line, so that the mounting portion (31) of the bracket (3) can be evenly mounted on the boss (21) of the optical lens (2).

8. The lens assembly (100) according to claim 1, characterized in that the boss (21) of the optical lens (2) and the mounting portion (31) of the bracket (3) are riveted together by a cold riveting process.

9. The lens assembly (100) according to claim 1, characterized in that, the connecting structure is adjacent to the side wall of the boss (21).

10. The lens assembly (100) as described in claim 1 is characterized in that the mounting portion (31) of the bracket (3) is annular and has a center hole (311), and the first surface (21a) of the boss (21) is provided with at least one first stop portion (211), wherein the at least one first stop portion (211) is located in the center hole (311) of the mounting portion (31) of the bracket (3) and protrudes from the bracket (3).

11. The lens assembly (100) as described in claim 10 is characterized in that the mounting portion (31) of the bracket (3) is provided with a notch (312) on a side away from the first bearing portion (32), and one of the first stop portions (211) is located in the notch (312).

12. The lens assembly (100) according to claim 1, characterized in that the mounting portion (31) of the bracket (3) covers 60-70% of the area of the first surface (21a).

13. The lens assembly (100) as described in any one of claims 1 to 12, characterized in that, the base (1) has a light window (111) for allowing light from the optical lens (2) to pass through the accommodating cavity (10), and a color filter (112) is provided at the light window (111).

14. The lens assembly (100) as described in claim 13 is characterized in that the driving mechanism includes a coil (41) and a magnetic element (42) arranged opposite to each other, the magnetic element (42) is installed on the first bearing portion (32) of the bracket (3), a first circuit board (6) is provided on the side of the base (1), and the coil (41) is electrically connected to the first circuit board (6).

15. A camera module, characterized in that it uses a lens assembly (100) as described in any one of claims 1 to 14, the base (1) is provided with a photosensitive component (9) located outside the accommodating cavity (10), and the optical lens (2) is located on the photosensitive path of the photosensitive component (9).

16. A camera module, characterized in that the lens assembly (100) as claimed in claim 13 or 14 is applied, the base (1) is provided with a photosensitive component (9) located outside the accommodating cavity (10), and the optical lens (2) is located on the photosensitive path of the photosensitive component (9);

The base (1) is provided with an annular shoulder (11), the central hole of the shoulder (11) constitutes the light window (111), and the shoulder (11) has a first side portion (11a) and a second side portion (11b) opposite to each other, the first side portion (11a) is adjacent to the first bearing portion (32) of the bracket (3), and the second side portion (11b) is far away from the first bearing portion (32) of the bracket (3), and the width of the first side portion (11a) is greater than the width of the second side portion (11b).

17. A camera module, characterized in that the lens assembly (100) as claimed in claim 14 is applied, the base (1) is provided with a photosensitive assembly (9) located outside the accommodating cavity (10), and the optical lens (2) is located on the photosensitive path of the photosensitive assembly (9);

The base (1) is provided with an annular shoulder (11), the central hole of the shoulder (11) constitutes the light window (111), and the shoulder (11) has a first side portion (11a) and a second side portion (11b) opposite to each other, the first side portion (11a) being adjacent to the first bearing portion (32) of the bracket (3), and the second side portion (11b) being away from the first bearing portion (32) of the bracket (3), and the width of the first side portion (11a) being greater than the width of the second side portion (11b);

The base (1) has a recess (14) recessed toward the interior of the accommodating cavity (10), the recess (14) being located between a side wall on the base (1) corresponding to the first bearing portion (32) and the first side portion (11a), and the recess (14) being located below the coil (41).

18. An electronic device, characterized in that it comprises a main body, wherein the camera module as claimed in claim 15, 16 or 17 is installed on the main body.