WO2023173997A1

WO2023173997A1 - Lens assembly and assembling method therefor, and camera module

Info

Publication number: WO2023173997A1
Application number: PCT/CN2023/076762
Authority: WO
Inventors: 白华; 卞强龙; 刘佳; 胡国权; 龚铁夫
Original assignee: 宁波舜宇光电信息有限公司
Priority date: 2022-03-16
Filing date: 2023-02-17
Publication date: 2023-09-21
Also published as: CN116794794A

Abstract

A lens assembly (20) and an assembling method therefor, and a camera module. The lens assembly (20) comprises an outer lens group (21), a focusing lens group (22), an inner lens group (23), a bearing part (27), and a driving part (26); the outer lens group (21), the focusing lens group (22), and the inner lens group (23) are sequentially arranged in an optical axis direction; the focusing lens group (22) is disposed on the bearing part (27); the driving part (26) comprises a driving coil (261) and driving magnet (262) corresponding to each other in position; one of the driving coil (261) and the driving magnet (262) is disposed on the bearing part (27); when the driving coil (261) is energized, the magnetic field generated by the driving coil (261) and the magnetic field of the driving magnet (262) can interact to drive the focusing lens group (22) to move in the optical axis direction, so as to achieve focusing of a camera module.

Description

Lens assembly and assembly method and camera module

Technical field

The present invention relates to optical imaging devices, and in particular to a lens assembly and its assembly method and camera module.

Background technique

In recent years, small camera devices equipped with imaging elements such as CCD (Charge Coupled Device) image sensors and CMOS (Complementary Metal-Oxide Semiconductor) image sensors have been gradually installed in portable electronic devices. Moreover, with the development trend of portable electronic devices towards thinness and lightness, it has put forward strict requirements on the size of camera modules; at the same time, users have also put forward higher expectations for the imaging capabilities of camera modules, for example, with When a camera module using an optical lens with 3-5 elements is mounted on a portable electronic device, there is often a need for automatic focus adjustment in order to obtain better imaging effects. In the past, in such camera modules, due to the small number of lenses and multi-position single focus, an integral drive structure was often used to drive the overall movement of the optical lens to achieve automatic focusing. That is, a lens was configured on the outside of the optical lens. A surrounding driver (for example, a voice coil motor), the driver can drive the optical lens to move along the optical axis to achieve focusing of the camera module. However, since the driver surrounds the outside of the optical lens, and the driver has a complex structure and large size, the overall size of the camera module is large, which cannot meet the configuration requirements of thin and light electronic devices.

In recent years, in order to reduce the size of the camera module to meet the needs of portable electronic devices, the industry has proposed an internal focusing solution that moves part of the lens of the optical lens. However, an optical lens using internal focusing needs to have a lens in order to adjust the focus. The driving mechanism of the lens moves in the direction of the optical axis, so in the camera module with internal focusing, it is easy to cause the increase in mechanical parts and the eccentricity of the center position of the lens in the direction of the optical axis, resulting in the camera module The group is prone to poor imaging quality problems such as unilateral blur.

Contents of the invention

An object of the present invention is to provide a lens assembly and its assembly method and a camera module, wherein the lens assembly has a built-in focusing function, so that the camera module does not need to change the position and size of the entire lens assembly when focusing. That is, the total optical length of the lens assembly will not be affected, thereby helping to reduce the height dimension of the camera module and achieve miniaturization of the camera module.

An object of the present invention is to provide a lens assembly and its assembly method and camera module, wherein the The driving part of the lens assembly is sunk to reduce the size of the camera module at the corresponding position of the outer lens group of the lens assembly, thereby facilitating the miniaturization of the camera module.

An object of the present invention is to provide a lens assembly, an assembly method thereof, and a camera module, wherein the inner lens group of the lens assembly is a D-CUT lens group, and the driving part is disposed in a circle corresponding to the inner lens group. The position of the arc edge is conducive to narrowing the camera module and further reducing the size of the camera module.

An object of the present invention is to provide a lens assembly, an assembly method thereof, and a camera module, wherein the lens carrier of the lens assembly for carrying the outer lens group can avoid the focusing lens group for suspending the lens assembly. The carrying part is conducive to increasing the stroke of the focusing lens group and achieving focusing of the camera module in a wider range.

One object of the present invention is to provide a lens assembly, an assembly method thereof, and a camera module, wherein the outer lens group can avoid the bearing portion and the focus lens group, which is conducive to further increasing the stroke of the focus lens group. And the focusing of the camera module is achieved in a larger range.

An object of the present invention is to provide a lens assembly, an assembly method thereof, and a camera module, wherein the lens assembly provides a suspension portion for reliably and stably suspending the bearing portion and the The focus lens group is between the outer lens group and the inner lens group. Preferably, the suspension part allows the driving part to smoothly drive the carrying part and the focusing lens group to move along the optical axis direction, so as to improve the focusing sensitivity of the camera module and reduce the stress on the driving part. driving force requirements.

According to one aspect of the present invention, the present invention provides a lens assembly, which includes:

outside lens group;

focus lens group;

An inner lens group, wherein the outer lens group, the focus lens group and the inner lens group are arranged in sequence along the optical axis direction;

a carrying part, wherein the focus lens group is provided on the carrying part; and

A driving part, wherein the driving part includes a driving coil and a driving magnet with corresponding positions, and one of the driving coil and the driving magnet is provided on the carrying part.

According to an embodiment of the present invention, the bottom of the carrying portion extends to the outside of the inner lens group.

According to an embodiment of the present invention, the load-bearing part includes a bottom load-bearing element, a top load-bearing element and an extension arm. The extension arm integrally extends upward and inward from the bottom load-bearing element to the top load-bearing element. carrying element, wherein the bottom carrying element has a holding cavity, the inner lens group is held in the holding cavity of the bottom carrying element, and wherein one of the driving coil and the driving magnet is disposed on the A bottom carrying component, wherein the focus lens group is disposed on the top carrying component.

According to an embodiment of the present invention, the lens assembly further includes a lens carrier, the outer lens group is disposed on the lens carrier, wherein the lens carrier has a carrier escape space, and the carrier escape space of the lens carrier Corresponding to the extension arm of the bearing part, so as to allow the extension arm of the bearing part to enter the carrier avoidance space of the lens carrier.

According to an embodiment of the present invention, the outer lens group has a lens escape space, and the lens escape space of the outer lens group corresponds to and is connected with the carrier escape space of the lens carrier.

According to an embodiment of the present invention, the outer lens group has a lens escape groove, and the lens escape space is connected with the lens escape groove.

According to an embodiment of the present invention, the lens assembly further includes a driving base, the driving base is disposed adjacent to the carrying part, wherein the driving coil is disposed on the driving base, and the driving magnet is disposed on the carrying portion.

According to an embodiment of the present invention, the bearing portion has an embedded groove, and the driving magnet is embedded in the embedded groove of the bearing portion. Correspondingly, the driving base has a coil accommodation cavity, and the driving magnet is embedded in the embedded groove of the bearing portion. The driving coil is accommodated in the coil receiving cavity of the driving base.

According to an embodiment of the present invention, the driving part includes a circuit board, the driving coil is mounted on the circuit board, wherein the coil receiving cavity of the driving base is in the shape of a through hole, and the circuit board It is mounted on the driving base to keep the driving coil in the coil receiving cavity of the driving base.

According to an embodiment of the present invention, the driving base has a seat groove, and the circuit board is located in the seat groove of the driving base.

According to an embodiment of the present invention, the lens assembly further includes a suspension portion, the suspension portion includes a magnetic unit and a support unit, wherein the magnetic unit is disposed on the driving base, and the magnetic unit The position of the unit corresponds to the position of the driving magnet to generate a magnetic attraction force therebetween, wherein the support unit is disposed between the driving seat and the carrying part.

According to an embodiment of the present invention, the support unit includes balls, and the balls are rollably disposed between the driving base and the bearing part.

According to an embodiment of the present invention, at least one of the driving seat and the bearing part is provided with a track groove of the support unit, and the ball is rollably retained in the track groove.

According to an embodiment of the present invention, the inner lens group has two opposite arc edges and two opposite tangential edges, wherein the driving portion is disposed corresponding to the arc edge of the inner lens group. Location.

According to another aspect of the present invention, the present invention further provides a camera module, which includes a photosensitive component and a lens component disposed on the photosensitive path of the photosensitive component, wherein the lens component includes:

outside lens group;

focus lens group;

Description of the drawings

FIG. 1 is a schematic three-dimensional view of a camera module according to a preferred embodiment of the present invention.

2A and 2B are respectively schematic cross-sectional views of the camera module at different positions according to the above-mentioned preferred embodiment of the present invention.

3A and 3B are respectively exploded schematic views of the camera module from different perspectives according to the above-mentioned preferred embodiment of the present invention.

4A and 4B are respectively schematic cross-sectional views of the camera module in different states according to the above-mentioned preferred embodiment of the present invention.

FIG. 5 is a schematic cross-sectional view of a camera module according to another preferred embodiment of the present invention.

FIG. 6 is a schematic cross-sectional view of a camera module according to yet another preferred embodiment of the present invention.

Detailed ways

Before any embodiments of the present invention are described in detail, it is to be understood that this invention is not limited in its application to the details of construction and arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or carried out in various ways. Additionally, it is to be understood that the phraseology and terminology used herein are for the purpose of description and should not be regarded as limiting. The use of "including,""including," or "having" and variations thereof herein is intended to encompass the items set forth below and their equivalents as well as additional items. Unless otherwise specified or limited, the terms "installation,""connection,""support," and "joint" and its variations are widely used and cover direct and indirect installations, connections, supports and joints. Furthermore, "connected" and "coupled" are not limited to physical or mechanical connections or couplings.

And, in the first aspect, in the disclosure of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical" The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description. Rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, the above terms cannot be understood as limiting the invention; secondly, the term "a" should be understood as "at least one" ” or “one or more”, that is, in one embodiment, the number of an element may be one, and in other embodiments, the number of the element may be multiple, and the term “a” cannot be understood as a reference to quantity. limits.

With reference to Figures 1 to 4B of the accompanying drawings, a camera module according to a preferred embodiment of the present invention is disclosed and explained in the following description, wherein the camera module includes a photosensitive component 10 and A lens assembly 20 is provided on the photosensitive assembly 10 .

Specifically, referring to FIGS. 1 to 4B , the photosensitive component 10 includes a circuit board 11 , a photosensitive chip 12 and a lens base 13 , wherein the photosensitive chip 12 is electrically connected to the circuit board 11 , wherein the photosensitive chip 12 is electrically connected to the circuit board 11 . The lens base 13 has a light hole 131, the mirror base 13 is provided on the circuit board 11, and the photosensitive chip 12 corresponds to the light hole 131 of the mirror base 13, so that incident light is allowed After passing through the light hole 131 of the lens base 13, it reaches the photosensitive area of the photosensitive chip 12, so that the photosensitive chip 12 performs photoelectric conversion to form an image.

Preferably, the photosensitive component 10 further includes at least one set of connecting wires 14 , the photosensitive chip 12 is mounted on the circuit board 11 , and one end of the connecting wire 14 is welded to the photosensitive chip 12 . Chip pad, the other end of the connection wire 14 is soldered to the board pad of the circuit board 11 to conductively connect the photosensitive chip 12 and the circuit board 11 through the connection wire 14 .

Preferably, with reference to FIGS. 1 to 4B , the lens base 13 is a prefabricated component that is mounted on the circuit board 11 , and the photosensitive chip 12 corresponds to the light-passing surface of the lens base 13 Hole 131.

Optionally, in another preferred embodiment of the camera module shown in FIG. 5 , the lens base 13 is integrally formed on the circuit board 11 and the non-photosensitive area of the photosensitive chip 12 , The light hole 131 of the mirror base 13 is formed at the same time as the mirror base 13 is being formed, and the photosensitive area of the photosensitive chip 12 corresponds to the light hole 131 of the mirror base 13 . In this embodiment of the camera module, the lens base 13 can bury the connecting wire 14 to prevent the connecting wire 14 from being removed from the circuit. The board 11 or the photosensitive chip 12 falls off.

Optionally, in other examples of the camera module of the present invention, the lens holder 13 is integrally formed on the circuit board 11 , and there is a safe distance between the lens holder 13 and the photosensitive chip 12 . In this way, after the lens holder 13 is integrally formed on the circuit board 11 , the photosensitive chip 12 can be mounted on the circuit board 11 through the light hole 131 of the lens holder 13 .

Continuing to refer to FIGS. 1 to 4B , the photosensitive component 10 further includes at least one electronic component 15 . The electronic component 15 may be but is not limited to a resistor, a capacitor, a processor, etc., wherein the electronic component 15 is Mounted on the circuit board 11 , there is a safe distance between the electronic component 15 and the lens holder 13 .

Optionally, in another preferred embodiment of the camera module shown in FIG. 5 , the lens base 13 integrally embeds the electronic component 15 , that is, in the electronic component 15 There is no safety distance between the camera module and the lens holder 13 , which is beneficial to reducing the length, width and height of the camera module.

Continuing to refer to FIGS. 1 to 4B , the photosensitive component 10 further includes a filter 16 , which may be but is not limited to an infrared cutoff filter, wherein the filter 16 is mounted on The top surface of the lens holder 13 is used to maintain the photosensitive path of the optical filter 16 in the photosensitive chip 12, so that the incident light can be filtered to a specific type of light when passing through the optical filter 16, so as to have This is beneficial to subsequent clear imaging of the photosensitive chip 12 .

Continuing to refer to FIGS. 1 to 4B , the photosensitive component 10 further includes a connector 17 , which is disposed on the circuit board 11 , wherein the connector 17 is used to connect the camera module. for portable electronic devices.

Continuing to refer to FIGS. 1 to 4B , the lens assembly 20 is mounted on the lens base 13 of the photosensitive assembly 10 to maintain the lens assembly 20 on the photosensitive chip 12 of the photosensitive assembly 10 . The photosensitive path allows incident light to reach the photosensitive chip 12 after sequentially passing through the lens assembly 20 , the filter 16 and the light hole 131 of the lens base 13 to allow the photosensitive chip to 12 carries out photoelectric conversion and imaging.

The lens assembly 20 of the camera module of the present invention has a built-in focusing function. In this way, on the one hand, the camera module has a focusing function to help improve the imaging quality of the camera module, and on the other hand, the camera module has a focusing function. On the other hand, the camera module does not need to change the position and size of the entire lens assembly 20 when focusing, that is, the total optical length of the lens assembly 20 will not be affected, which is beneficial to reducing the height of the camera module. size to achieve miniaturization of the camera module to meet the small opening requirements of portable electronic devices needs.

Specifically, continuing to refer to FIGS. 1 to 4B , the lens assembly 20 includes an outer lens group 21 , a focus lens group 22 and an inner lens group 23 , wherein the outer lens group 21 and the focus lens group 22 and the inner lens group 23 are arranged sequentially along the optical axis direction to allow incident light to pass through the outer lens group 21 , the focus lens group 22 and the inner lens group 23 of the lens assembly 20 in sequence. And after passing through the filter 16 of the photosensitive component 10, it can reach the photosensitive chip 12, so that the photosensitive chip 12 can subsequently perform photoelectric conversion to form an image.

During the focusing process of the camera module, the position of the outer lens group 21 of the lens assembly 20 relative to the photosensitive chip 12 and the position of the inner lens group 23 relative to the photosensitive chip 12 are maintained. The focus lens group 22 of the lens assembly 20 is driven to move along the optical axis direction to change the relative position of the focus lens group 22 to the outer lens group 21 , the inner lens group 23 and the The location of the photosensitive chip 12.

The lens assembly 20 includes a housing 24 , and the housing 24 further includes a housing 241 and a base 242 and has a focusing space 243 . The housing 241 has a housing passage 2411, the outer lens group 21 is held on the upper side of the housing 241, and the outer lens group 21 corresponds to the housing passage of the housing 241. 2411. The base 242 has a base channel 2421, the inner lens group 23 is disposed on the upper side of the base 242, and the inner lens group 23 corresponds to the base channel 2421 of the base 242. The housing 241 and the base 242 are installed with each other to form the focusing space 243 between the housing 241 and the base 242 , wherein the focusing lens group 22 is located on the side of the housing 24 The focus space 243 is drivably suspended between the outer lens group 21 and the inner lens group 23 , so that the lens assembly 20 has a built-in focusing function.

It can be understood that the outer lens group 21 and the housing 24 form the general appearance of the lens assembly 20 .

It is worth mentioning that the installation method of the housing 241 and the base 242 of the housing 24 is not limited in the camera module of the present invention. For example, the housing 241 and the base 242 of the housing 24 may be installed to interlock with each other, or the housing 241 and the base 242 may be bonded.

The outer lens group 21 is held on the upper side of the housing 241 to allow the lens assembly 20 to adopt a "small head" design, so that the camera module serves as a front camera module of an electronic device. At this time, the outer lens group 21 of the lens assembly 20 can be closer to the opening position of the screen of the electronic device, which is beneficial to the camera module to obtain a larger field of view and light transmission, so as to improve the camera Module formation Like quality.

The lens assembly 20 further includes a lens carrier 25. The lens carrier 25 is installed on the housing 241 of the housing 24, and the lens carrier 25 protrudes into the housing channel of the housing 241. 2411, wherein the outer lens group 21 is mounted on the lens carrier 25, so that the outer lens group 21 is arranged outside the housing 241. Optionally, in other examples of the camera module of the present invention, the outer lens group 21 can be directly installed on the outer side of the housing 241 of the housing 24 to set the outer lens group. 21 on the upper side of the housing 241 .

Specifically, the outer lens group 21 includes an outer lens barrel 211 and at least one outer lens 212 installed on the outer lens barrel 211 , wherein the end surface of the outer lens barrel 211 of the outer lens group 21 can pass through Adhesives such as glue are attached to the lens carrier 25 . Preferably, there is a gap between the end surface of the outer lens barrel 211 of the outer lens group 21 and the lens carrier 25, so that there is space for assembling the outer lens group 21 when the outer lens group 21 is assembled. The position is actively calibrated, and after the active calibration is completed, the gap is filled with adhesives such as glue to fix the outer lens group 21 and the lens carrier 25 and enhance the sealing of the lens assembly 20, thereby avoiding Dust and other contaminants enter the interior of the lens assembly 20 . More specifically, the outer lens group 21 includes two outer lenses 212 , wherein the two outer lenses 212 are installed on the outer lens barrel 211 along the height direction.

Referring to FIGS. 3A and 3B , the lens carrier 25 includes a carrier fixing component 251 , a carrier arm 252 and a carrier 253 . The carrier arm 252 integrally extends inwardly from the carrier fixing component 251 . The carrier 253 integrally extends upward from the carrier arm 252 . The carrier fixing element 251 of the lens carrier 25 is installed on the housing 241 of the housing 24 so that the carrier fixing element 251 is held in the focusing space 243 of the housing 24. The platform 253 protrudes into the housing channel 2411 of the housing 241, wherein the outer lens barrel 211 of the outer lens group 21 is mounted on the stage 253 of the lens carrier 25, so that through The lens carrier 25 disposes the outer lens group 21 on the upper side of the housing 241 .

The inner lens group 23 is disposed on the upper side of the base 242 of the housing 24 to keep the inner lens group 23 in the focusing space 243 of the housing 24 , thereby preventing the inner lens group 23 from The base 242 is protruded downward, so that the base 242 of the housing 24 can be directly mounted on the lens base 13 to set the lens assembly 20 on the photosensitive assembly 10 .

Specifically, the inner lens group 23 includes an inner lens barrel 231 and at least one inner lens 232 installed on the inner lens barrel 231. The end surface of the inner lens barrel 231 is attached to all parts of the housing 24. The inner lens group 23 is disposed on the upper side of the base 242 . More specifically, the inner lens group 23 includes two inner lenses 232 , and the two inner lenses 232 are mounted on the inner lens barrel 231 along the height direction.

Preferably, the end surface of the inner barrel 231 of the inner lens group 23 and the upper side of the base 242 are mounted through an adhesive such as glue, where the adhesive such as glue can be used to fix the calibrated lens. The inner lens group 23 is fixed and can fill the gap formed between the bottom end of the inner lens barrel 231 and the upper side of the base 242 to enhance the sealing of the lens assembly 20 and avoid dust. and other contaminants entering the interior of the lens assembly 20 .

The focus lens group 22 further includes a pair of focus lens barrels 221 and at least one pair of focus lenses 222 installed on the focus lens barrel 221 . The outer lens 212 of the outer lens group 21, the focus lens 222 of the focus lens group 22, and the inner lens 232 of the inner lens group 23 form a complete optical system, and as the When the position of the focus lens group 22 relative to the outer lens group 21 and the inner lens group 23 changes, the focus position of the optical system is changed to achieve focusing of the camera module.

Continuing to refer to FIGS. 1 to 4B , the lens assembly 20 further includes a driving part 26 and a carrying part 27 drivably connected to the driving part 26 , and the focusing lens group 22 is disposed on the carrying part. part 27, wherein the driving part 26 is configured to drive the focus lens group 22 to move along the optical axis direction between the outer lens group 21 and the inner lens group 23 through the carrying part 27 to achieve The focus of the camera module.

Preferably, the bottom of the carrying portion 27 extends to the outside of the inner lens group 23 and is drivably connected to the driving portion 26 so that the driving portion 26 sinks to the inner lens group 23 . On the outside, this is beneficial to reducing the length, width and height space of the camera module occupied by the driving part 26, thereby reducing the length and width of the camera module and reducing the height of the camera module.

Preferably, the inner lens group 23 is a double-sided D-CUT lens group, so that the inner lens group 23 has two opposite arc edges 233 and two opposite cutting edges 234, wherein the driving part 26 It is arranged at a position corresponding to the arc edge 233 of the inner lens group 23, which is conducive to narrowing the camera module and further reducing the width of the camera module.

Referring to FIGS. 3A and 3B , the bearing portion 27 includes a bottom bearing element 271 , a top bearing element 272 and at least one extending arm 273 , wherein the extending arm 273 is integrated upward and inward from the bottom bearing element 271 extends to the top load-bearing member 272 such that the top load-bearing member 272 The height position is higher than the height position of the bottom carrying element 271 . The bottom carrying element 271 has a holding cavity 2711, and the inner lens group 23 is held in the holding cavity 2711 of the bottom carrying element 271 to allow the bottom of the carrying portion 27 to extend to the inner lens group. 23 outside. The focus lens barrel 221 of the focus lens group 22 is mounted on the top carrying component 272 of the carrying part 27 . For example, the top carrying element 272 is annular. After the focusing lens group 22 is installed into the top carrying element 272 of the carrying portion 27 and the focusing lens group 22 is actively calibrated, glue or the like can be used to adhere it. The adhesive fixes the focus lens barrel 221 of the focus lens group 22 and the top bearing element 272 of the bearing portion 27 .

It is worth mentioning that the number of the extension arms 273 of the carrying part 27 is not limited in the camera module of the present invention. For example, in the specific example of the camera module shown in FIGS. 1 to 4B , the carrying part 27 includes four extension arms 273 , and the four extension arms 273 are preferably equidistantly distributed. . Optionally, in other specific examples of the camera module of the present invention, the number of the extending arms 273 of the carrying part 27 may be two, three, five, six or more.

Continuing to refer to FIGS. 3A and 3B , the lens carrier 25 has at least one carrier avoidance space 254 , the position of the extension arm 273 of the bearing portion 27 and the position of the carrier avoidance space 254 of the lens carrier 25 Correspondingly, when the driving part 26 drives the focus lens group 22 to move along the optical axis direction through the carrying part 27, the extending arm 273 of the carrying part 27 can enter the lens carrier 25. The carrier avoidance space 254 allows the lens carrier 25 to avoid the bearing part 27, so that the bearing part 27 and the focus lens group 22 have a greater stroke, so that the camera module can move in a larger direction. focus within the range.

Preferably, the outer lens barrel 211 of the outer lens group 21 has at least one lens escape space 2111, the lens escape space 2111 of the outer lens barrel 211 and the carrier escape space 254 of the lens carrier 25. Corresponding and connected, when the driving part 26 drives the focus lens group 22 to move along the optical axis direction through the carrying part 27, the extending arm 273 of the carrying part 27 can enter the lens The carrier escape space 254 of the carrier 25 and the lens escape space 2111 of the outer lens barrel 211 allow the carrying part 27 and the focus lens group 22 to have a larger stroke, so that the camera module can Focus over a wider range. Preferably, the outer lens barrel 211 of the outer lens group 21 further has a lens escape groove 2112. The lens escape groove 2112 is connected with the lens escape space 2111, and the focusing lens group 22 can enter the lens escape groove 2112. The lens avoidance groove 2112 of the outer lens barrel 211 allows the outer lens group 21 to avoid the focus lens group 22, thus allowing all The camera module focuses on a wider range.

Further, the driving part 26 includes a driving coil 261 and a driving magnet 262 in corresponding positions, wherein in the specific example of the camera module shown in FIGS. 1 to 4B , the driving magnet 262 is provided on the carrying part 27. When the driving coil 261 is energized, the magnetic field generated by the driving coil 261 interacts with the magnetic field of the driving magnet 262 to drive the carrying part 27 and the focus. The lens group 22 moves along the optical axis direction to achieve focusing of the camera module. Optionally, in other examples of the camera module of the present invention, the driving coil 261 is provided on the carrying part 27. When the driving coil 261 is energized, the magnetic field generated by the driving coil 261 It interacts with the magnetic field of the driving magnet 262 to drive the carrying part 27 and the focusing lens group 22 to move along the optical axis direction, thereby achieving focusing of the camera module.

Preferably, continuing to refer to FIGS. 1 to 4B , the driving magnet 262 of the driving part 26 is disposed on the bottom carrying element 271 of the carrying part 27 , so that the driving part 26 sinks to the outside the inner lens group 23 to help reduce the length, width and height space of the camera module occupied by the driving part 26 . More preferably, the bottom carrying element 271 has an embedded slot 2712, and the driving magnet 262 is embedded in the embedded slot 2712 of the bottom carrying element 271 to facilitate reducing the size of the camera module. length and width dimensions.

Continuing to refer to FIGS. 1 to 4B , the lens assembly 20 includes a driving base 28 , the driving base 28 is disposed adjacent to the carrying portion 27 , and the driving coil 261 is disposed on the driving base 28 . In other words, the driving seat 28 is used to maintain the driving coil 261 in a position corresponding to the driving magnet 262 .

Preferably, the driving base 28 has a through-hole-shaped base space 281, wherein the bottom bearing element 271 of the bearing portion 27 is movably retained in the base space 281 of the driving base 28, The driving base 28 holds the driving coil 261 in a position corresponding to the driving magnet 262 .

Preferably, the driving base 28 is disposed on the base 242 of the housing 24. For example, the driving base 28 and the base 242 of the housing 24 can be bonded by an adhesive such as glue. The driving base 28 is disposed on the base 242 of the housing 24 . Optionally, the driving base 28 and the base 242 of the housing 24 are integrally formed, that is, the driving base 28 integrally extends upward from the base 242 of the housing 24 . Optionally, the driving seat 28 is provided on the housing 241 of the housing 24 , or the driving seat 28 and the housing 241 of the housing 24 are integrally formed.

Preferably, the carrier fixing element 251 of the lens carrier 25 is installed on the driving base 28, To maintain the carrier fixing element 251 in the focusing space 243 of the housing 24 .

Further, the driving base 28 has a coil receiving cavity 282 extending outward from the base space 281 , wherein the driving coil 261 is accommodated in the coil of the driving base 28 The accommodation cavity 282 is used to facilitate reducing the length and width of the camera module.

Continuing to refer to FIGS. 1 to 4B , the driving part 26 includes a circuit board 263 , and the driving coil 261 is electrically connected to the circuit board 263 so that the circuit board 263 supplies power to the driving coil 261 . For example, the circuit board 263 of the driving part 26 may be electrically connected to the circuit board 11 of the photosensitive component 10 , wherein the circuit board 11 supplies power to the driving coil 261 through the circuit board 263 , the driving coil 261 can generate a magnetic field. Preferably, the circuit board 263 is a flexible circuit board, such as an FPC board, to reduce the space occupied by the circuit board 263.

Preferably, the coil receiving cavity 282 of the driving base 28 is in the shape of a through hole, and the driving coil 261 is mounted on the circuit board 263, wherein the circuit board 263 is mounted on the driving base 28. The outer wall of the circuit board 263 holds the driving coil 261 in the coil receiving cavity 282 of the driving base 28 . Preferably, the driving seat 28 has a seat groove 283, and the circuit board 263 is mounted on the seat groove 283 of the driving seat 28, so as to facilitate reducing the length and width of the camera module.

Continuing to refer to FIGS. 1 to 4B , the lens assembly 20 further includes a suspension portion 29 , the suspension portion 29 includes a magnetic unit 291 and at least one support unit 292 , wherein the magnetic unit 291 is provided on the driving seat 28, and the position of the magnetic unit 291 corresponds to the position of the driving magnet 262 of the driving part 26, so as to allow the magnetic unit 291 and the driving magnet 262 to use magnetic attraction. and attract each other, so that the bottom carrying element 271 of the carrying part 27 has a tendency to be close to the driving base 28 , wherein the supporting unit 292 is disposed on the bottom carrying element 271 of the carrying part 27 between the outer wall and the inner wall of the driving base 28 to prevent the bottom bearing element 271 of the bearing portion 27 from approaching the driving seat 28, so that the hanging portion 29 suspends the bearing portion 27 on the The focusing space 243 of the housing 24 . Preferably, the magnetic unit 291 is mounted on the circuit board 263 of the driving part 26 .

Further, the support unit 292 includes at least two balls 2921. These balls 2921 are rollably retained between the outer wall of the bottom load-bearing element 271 and the inner wall of the drive base 28 to prevent the bottom load-bearing element 271 from being rolled. The element 271 is close to the driving seat 28 and allows the driving part 26 to smoothly drive the carrying part 27 and the focusing lens group 22 to move along the optical axis direction. Preferably, each end of the driving magnet 262 is retained with at least one ball 2921 to avoid the bearing portion 27 tilt.

Preferably, the support unit 292 has two first track grooves 2922 and two second track grooves 2923 extending along the optical axis direction, and the two first track grooves 2922 are provided at all parts of the bearing part 27 . The bottom load-bearing component 271, and the two first track grooves 2922 are held on opposite sides of the embedded slot 2712 of the bottom load-bearing component 271, and the two second track grooves 2923 are provided on the The driving seat 28 has two second track grooves 2923 held on opposite sides of the seat groove 283, wherein a part of the ball 2921 is rollably held in the first track groove 2922, and a part is held in the first track groove 2922. The ball 2921 is held in the second track groove 2923, and the ball 2921 creates a gap between the outer wall of the bottom bearing element 271 and the inner wall of the driving seat 28, so that the ball 2921 is rollably retained in the between the outer wall of the bottom carrying element 271 and the inner wall of the driving base 28 .

Continuing to refer to FIGS. 1 to 4B , the lens assembly 20 further includes a dust cover 210 . The dust cover 210 is attached to the housing 241 of the housing 24 for closing the housing. The housing channel 2411 of the housing 241 is used to prevent dust and other contaminants from entering the interior of the lens assembly 20 from the housing channel 2411 of the housing 241 .

In addition, the assembly process of the lens assembly 20 of the camera module shown in FIGS. 1 to 4B is as follows.

Step S1, install the lens carrier 25 inside the housing 241 from the bottom opening of the housing 241 of the housing 24, wherein the carrier fixing element 251 of the lens carrier 25 is located in the housing. 241 , the stage 253 of the lens carrier 25 protrudes into the housing channel 2411 of the housing 241 .

Step S2: Install the fixing base 28 with the driving coil 261, the circuit board 263 and the magnetic unit 291 on the housing 241 from the bottom opening of the housing 241 of the housing 24. Inside, the position of the driving coil 261 corresponds to that of the magnetic unit 291 , and the driving coil 261 and the magnetic unit 291 are located on opposite sides of the circuit board 263 .

Step S3: Install the driving magnet 262 and the carrying portion 27 of a standard lens inside the housing 241 from the bottom opening of the housing 241 of the housing 24, wherein the driving magnet 262 The positions correspond to the driving coil 261 and the magnetic unit 291 respectively, and the supporting unit 292 is held between the inner wall of the driving seat 28 and the outer wall of the bottom bearing element 271 of the bearing portion 27 During this time, the carrying part 27 is suspended by the magnetic attraction force generated by the driving magnet 262 and the magnetic attraction unit 291 and in cooperation with the support unit 292 , wherein the standard lens 27 is temporarily set on The top of the carrying portion 27 carries the component 272 , and the standard lens 27 can extend out corresponding to the carrier avoidance space 254 of the lens carrier 25 and through the housing channel 2411 of the housing 241 The outside of the housing 241.

Step S4 , pre-fix the inner lens group 23 to the base 242 of the housing 24 .

Step S5, install the housing 241 and the base 242 of the housing 24 to allow the inner lens group 23 to extend to the holding cavity 2711 of the bottom bearing element 271 of the bearing portion 27. This When , the standard lens and the inner lens group 23 form an optical system capable of imaging.

Step S6: Actively calibrate the inner lens group 23. Specifically, first, the calibration photosensitive component is energized so that the light passing through the standard lens and the inner lens group 23 reaches the photosensitive chip of the calibration photosensitive component and forms an image; secondly, the image algorithm determines the adjustment according to the imaging quality. amount; again, adjust the relative position of the inner lens group 23 in at least one direction (X, Y, Z axis direction and rotation direction around the X, Y, Z axis) according to the adjustment amount, thereby improving the imaging quality (mainly including peak, Optical parameters such as field curvature and astigmatism) reach the target value to complete the calibration of the inner lens group 23. After the relative position of the inner lens group 23 is calibrated, the inner lens group 23 and the base 242 of the housing 24 are fixed.

Step S7, pre-fix the outer lens group 23 on the stage 253 of the lens carrier 25. At this time, the outer lens group 21, the standard lens and the inner lens group 23 form an image-capable Optical system.

Step S8: Actively calibrate the outer lens group 21. First, the calibration photosensitive component is energized, so that the light passing through the outer lens group 21, the standard lens and the inner lens group 23 reaches the photosensitive chip of the calibration photosensitive component and forms an image; secondly, the image algorithm determines the image according to the The imaging quality determines the adjustment amount; again, the relative position of the outer lens group 21 is adjusted in at least one direction (X, Y, Z axis direction and rotation direction around the X, Y, Z axis) according to the adjustment amount, so that the imaging quality ( Mainly including optical parameters such as peak value, field curvature, astigmatism) reach the target value to complete the calibration of the outer lens group 21. After the relative position of the outer lens group 21 is calibrated, the outer lens group 21 and the stage 253 of the lens carrier 25 are fixed.

Step S9 , replace the standard lens with the focus lens group 22 . Specifically, first, the standard lens is moved sideways (perpendicular to the optical axis direction of the camera module) through the carrier avoidance space 254 of the lens carrier 25 outside the housing 241 to move the lens carrier 25 . In addition to the standard lens; secondly, move the focus lens group 22 laterally through the carrier avoidance space 254 of the lens carrier 25 on the outside of the housing 241 to move into the inner lens group 22, where The inner lens group 22 is moved into the pre- The top carrying element 271 is fixed to the carrying portion 27. At this time, the outer lens group 21, the focus lens group 22 and the inner lens group 23 form an optical system capable of imaging.

Step S10: Actively calibrate the focus lens group 22. First, the calibration photosensitive component is energized so that the light passing through the outer lens group 21, the focus lens group 22 and the inner lens group 23 reaches the photosensitive chip of the calibration photosensitive component and forms an image; secondly, the image is formed by The algorithm determines the adjustment amount based on the imaging quality; again, adjusts the relative position of the focus lens group 22 in at least one direction (X, Y, Z axis direction and rotation direction around the X, Y, Z axis) according to the adjustment amount, so as to achieve imaging. The quality (mainly including optical parameters such as peak value, field curvature, astigmatism) reaches the target value to complete the calibration of the focusing lens group 22 . After the relative position of the focus lens group 22 is calibrated, the focus lens group 22 and the top bearing element 272 of the bearing portion 27 are fixed.

Step S11 , install the dust cover 210 on the housing 241 of the housing 24 so that the housing channel 2411 of the housing 241 is closed by the dust cover 210 .

Figure 6 shows the camera module according to another preferred example of the present invention. What is different from the camera module shown in Figures 1 to 4B is that the camera module shown in Figure 6 In this specific example of the camera module, the end surface of the bottom carrying element 271 of the carrying part 27 is drivably connected to the driving part 26 to allow the driving part 26 to move at the bottom of the carrying part 27 The carrying portion 27 and the focusing lens group 22 are driven to move in the direction of the optical axis to achieve focusing of the camera module.

Specifically, the driving part 26 includes a first piezoelectric sheet 264, a deformable electrode sheet 265 and a second piezoelectric sheet 266 that are stacked in sequence, wherein the electrode sheet 265 has an electrode sheet terminal 2651. , which is electrically connected to the negative electrode of a power control unit, wherein the opposite sides of the first piezoelectric sheet 264 have a first electrode layer 2641 and a second electrode layer 2642 respectively. The first piezoelectric sheet 264 The second electrode layer 2642 is connected to the electrode sheet 265, and the first electrode layer 2641 is electrically connected to the positive electrode of the power control unit, wherein the opposite sides of the second piezoelectric sheet 266 are respectively There is a third electrode layer 2661 and a fourth electrode layer 2662. The third electrode layer 2661 of the second piezoelectric sheet 266 is connected to the electrode sheet 265, and the fourth electrode layer 2662 is electrically connected. to the positive terminal of the power control unit. When the power control unit repeatedly applies power between the first electrode layer 2641 of the first piezoelectric sheet 264 and the third electrode layer 2661 of the second piezoelectric sheet 266 as well as the electrode sheet 265 When the pulse voltage is applied, the first electrode layer 2641 of the first piezoelectric sheet 264 and the third electrode layer 2661 of the second piezoelectric sheet 266 are energized to expand and contract, so as to allow the driving part 26 to The cross-sectional pattern is in an upward convex arc shape (for example, bowl-shaped). At this time, the driving part 26 drives the The carrying portion 27 and the focus lens group 22 move along the optical axis in a direction away from the photosensitive component 10 . Correspondingly, when the power control unit operates between the second electrode layer 2642 of the first piezoelectric sheet 264 and the fourth electrode layer 2662 of the second piezoelectric sheet 266 as well as the electrode sheet 265 When a pulse voltage is repeatedly applied, the second electrode layer 2642 of the first piezoelectric sheet 264 and the fourth electrode layer 2662 of the second piezoelectric sheet 266 are energized to expand and contract to allow the driving The cross-sectional pattern of the portion 26 is a concave arc shape (for example, bowl-shaped). At this time, the driving portion 26 drives the bearing portion 27 and the focusing lens group 22 along the light direction at the bottom of the bearing portion 27 . The axis moves toward the direction close to the photosensitive component 10 .

Preferably, the electrode sheet 265 of the driving part 26 is a metal plate to allow the electrode sheet 265 to have good elasticity, so that when the power control unit is powered off, the elasticity of the electrode sheet 265 can be used. The driving part 26 is quickly restored to the initial state.

Preferably, the driving part 26 is annular and surrounds the inner lens group 23 .

It is worth mentioning that the power control unit may be a logic unit composed of the circuit board 11 and the electronic components 15 of the photosensitive component 10 .

It is worth mentioning that the driving part 26 may be disposed on the driving base 28 , or the driving part 28 may be directly disposed on the base 242 of the housing 24 .

Those skilled in the art can understand that the above embodiments are only examples, and the features of different embodiments can be combined with each other to obtain embodiments that are easily imagined according to the disclosure of the present invention but are not explicitly indicated in the drawings.

Those skilled in the art should understand that the embodiments of the present invention shown in the above description and drawings are only examples and do not limit the present invention. The object of the present invention has been completely and effectively achieved. The functional and structural principles of the present invention have been shown and described in the embodiments, and the implementation of the present invention may have any variations or modifications without departing from the principles.

Claims

The lens assembly is characterized by including:

outside lens group;

focus lens group;

An inner lens group, wherein the outer lens group, the focus lens group and the inner lens group are arranged in sequence along the optical axis direction;

a carrying part, wherein the focus lens group is provided on the carrying part; and

A driving part, wherein the driving part includes a driving coil and a driving magnet with corresponding positions, and one of the driving coil and the driving magnet is provided on the carrying part.
The lens assembly according to claim 1, wherein a bottom of the carrying portion extends to an outside of the inner lens group.
The lens assembly of claim 2, wherein the carrying portion includes a bottom carrying element, a top carrying element and an extension arm integrally extending upward and inward from the bottom carrying element to the top carrying element , wherein the bottom carrying element has a holding cavity, the inner lens group is held in the holding cavity of the bottom carrying element, and wherein one of the driving coil and the driving magnet is disposed on the bottom carrying element. component, wherein the focus lens group is disposed on the top carrying component.
The lens assembly according to claim 3, further comprising a lens carrier, the outer lens group is disposed on the lens carrier, wherein the lens carrier has a carrier escape space, the carrier escape space of the lens carrier and the lens carrier The extending arms of the bearing part correspond to each other, so as to allow the extending arms of the bearing part to enter the carrier avoidance space of the lens carrier.
The lens assembly according to claim 4, wherein the outer lens group has a lens escape space, and the lens escape space of the outer lens group corresponds to and is connected with the carrier escape space of the lens carrier.
The lens assembly according to claim 5, wherein the outer lens group has a lens escape groove, and the lens escape space is connected with the lens escape groove.
The lens assembly according to any one of claims 1 to 6, further comprising a driving base disposed adjacent to the bearing portion, wherein the driving coil is disposed on the driving base, the driving base Magnets are provided on the carrying portion.
The lens assembly according to claim 7, wherein the bearing portion has an embedding groove, the driving magnet is embedded in the embedding groove of the bearing portion, and correspondingly, the driving base has a coil receiving cavity. , the driving coil is accommodated in the coil receiving cavity of the driving base.
The lens assembly according to claim 8, wherein the driving part includes a circuit board, the driving coil is mounted on the circuit board, and the coil receiving cavity of the driving base is in the shape of a through hole, so The circuit board is mounted on the driving base to retain the driving coil in the coil receiving cavity of the driving base.
The lens assembly according to claim 9, wherein the driving base has a seat groove, and the circuit board is located in the seat groove of the driving base.
The lens assembly according to claim 7, further comprising a suspension portion, the suspension portion includes a magnetic suction unit and a support unit, wherein the magnetic suction unit is disposed on the driving base, and the magnetic suction unit The position corresponds to the position of the driving magnet to generate a magnetic attraction force therebetween, wherein the support unit is disposed between the driving seat and the carrying part.
The lens assembly according to claim 11, wherein the support unit includes a ball, the ball being rollably disposed between the driving base and the bearing part.
The lens assembly according to claim 12, wherein at least one of the driving base and the bearing portion is provided with a track groove of the support unit, and the ball is rollably retained in the track groove.
The lens assembly according to any one of claims 1 to 6, wherein the inner lens group has two opposite arcuate edges and two opposite tangential edges, and wherein the driving portion is disposed corresponding to the inner lens group. The position of the arc edge of the group.
A camera module, characterized by including:

photosensitive components; and

The lens assembly according to any one of claims 1 to 14, wherein the lens assembly is disposed in the photosensitive path of the photosensitive component.