Lens assembly, assembling method thereof and camera module

Abstract

The application discloses a lens assembly, an assembling method thereof and a camera module. The lens assembly comprises an outer lens group, a focusing lens group, an inner lens group, a bearing part and a driving part. The outer lens group, the focusing lens group and the inner lens group are sequentially arranged along an optical axis direction. The focusing lens group is arranged on the bearing part. The driving part comprises a position corresponding driving coil and a driving magnet. One of the driving coil and the driving magnet is arranged on the bearing part. When the driving coil is electrified, the magnetic field generated by the driving coil and the magnetic field of the driving magnet can interact to drive the focusing lens group to move along the optical axis direction, thereby realizing the focusing of the camera module.

Description

Technical Field

[0001] This invention relates to optical imaging devices, and more particularly to a lens assembly, its assembly method, and a camera module. Background Technology

[0002] In recent years, small camera devices equipped with imaging elements such as CCD (Charge Coupled Device) and CMOS (Complementary Metal-Oxide Semiconductor) image sensors have been increasingly incorporated into portable electronic devices. Furthermore, as portable electronic devices trend towards thinner and lighter designs, stringent requirements have been placed on the size of camera modules. Simultaneously, users have higher expectations for the imaging capabilities of these modules. For example, camera modules with optical lenses employing 3-5 elements often require autofocus when incorporated into portable electronic devices to achieve better image quality. Previously, in such camera modules, due to the limited number of elements, they were often single-focus. In these cases, an integrated drive structure was typically used to move the entire optical lens to achieve autofocus. This involved a surrounding driver (e.g., a voice coil motor) positioned outside the optical lens, which propelled the lens along the optical axis to achieve focusing. However, because the driver is located around the outside of the optical lens and has a complex structure and large size, the overall size of the camera module is large and cannot meet the configuration requirements of thinner and lighter electronic devices.

[0003] In recent years, in order to reduce the size of camera modules 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, optical lenses that use internal focusing need to have a drive mechanism to move the lens in the optical axis direction for focusing. As a result, in camera modules with internal focusing, the increase in mechanical parts and the offset of the center position of the lens from the optical axis direction can easily lead to poor image quality problems such as one-sided blur. Summary of the Invention

[0004] One object of the present invention is to provide a lens assembly, an assembly method thereof, 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, it does not affect the overall optical length of the lens assembly, thereby facilitating the reduction of the height of the camera module and achieving miniaturization of the camera module.

[0005] One object of the present invention is to provide a lens assembly, an assembly method thereof, and a camera module, wherein the driving part of the lens assembly is recessed to reduce the size of the camera module at the corresponding position of the lens group on the outer side of the lens assembly, thereby facilitating the miniaturization of the camera module.

[0006] One 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 at a position corresponding to the arc edge of the inner lens group, which is beneficial to narrowing the camera module and further reducing the size of the camera module.

[0007] One 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 carrier for suspending the focusing lens group of the lens assembly, thereby increasing the travel of the focusing lens group and enabling the camera module to focus over a larger range.

[0008] 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 is able to avoid the support portion and the focusing lens group, thereby facilitating a further increase in the travel of the focusing lens group and enabling the camera module to focus over a larger range.

[0009] One 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 carrier portion and the focusing lens group between the outer lens group and the inner lens group. Preferably, the suspension portion allows the driving portion to smoothly drive the carrier portion and the focusing lens group to move along the optical axis, thereby improving the focusing sensitivity of the camera module and reducing the driving force required by the driving portion.

[0010] According to one aspect of the present invention, a lens assembly is provided, comprising:

[0011] Outer lens group;

[0012] Focusing lens group;

[0013] The inner lens group, wherein the outer lens group, the focusing lens group and the inner lens group are arranged sequentially along the optical axis;

[0014] A support portion, wherein the focusing lens group is disposed on the support portion; and

[0015] A driving unit, wherein the driving unit includes a driving coil and a driving magnet corresponding to a position, and one of the driving coil and the driving magnet is disposed in the bearing unit.

[0016] According to one embodiment of the present invention, the bottom of the support portion extends to the outside of the inner lens group.

[0017] According to one embodiment of the present invention, the support portion includes a bottom support element, a top support element, and an extension arm, the extension arm extending integrally upward and inward from the bottom support element to the top support element, wherein the bottom support element has a retaining cavity, the inner lens group is retained in the retaining cavity of the bottom support element, wherein one of the drive coil and the drive magnet is disposed in the bottom support element, and wherein the focusing lens group is disposed in the top support element.

[0018] According to one embodiment of the present invention, the lens assembly further includes a lens carrier, the outer lens group being disposed on the lens carrier, wherein the lens carrier has a carrier clearance space, the carrier clearance space of the lens carrier corresponding to the extension arm of the carrier portion, so as to allow the extension arm of the carrier portion to enter the carrier clearance space of the lens carrier.

[0019] According to one embodiment of the present invention, the outer lens group has a lens clearance space, and the lens clearance space of the outer lens group corresponds to and is connected to the carrier clearance space of the lens carrier.

[0020] According to one embodiment of the present invention, the outer lens group has a lens clearance groove, and the lens clearance space is connected to the lens clearance groove.

[0021] According to one embodiment of the present invention, the lens assembly further includes a drive mount disposed adjacent to the support portion, wherein the drive coil is disposed on the drive mount and the drive magnet is disposed on the support portion.

[0022] According to one embodiment of the present invention, the support portion has an insert groove, the driving magnet is inserted into the insert groove of the support portion, and correspondingly, the driving seat has a coil receiving cavity, the driving coil is received in the coil receiving cavity of the driving seat.

[0023] According to one embodiment of the present invention, the driving unit includes a circuit board, the driving coil is mounted on the circuit board, wherein the coil receiving cavity of the driving seat is in the form of a through hole, and the circuit board is mounted on the driving seat to hold the driving coil in the coil receiving cavity of the driving seat.

[0024] According to one embodiment of the present invention, the drive seat has a slot, and the circuit board is located in the slot of the drive seat.

[0025] According to one embodiment of the present invention, the lens assembly further includes a suspension portion, the suspension portion including a magnetic attraction unit and a support unit, wherein the magnetic attraction unit is disposed on the drive seat, and the position of the magnetic attraction unit corresponds to the position of the drive magnet to generate a magnetic attraction force between them, wherein the support unit is disposed between the drive seat and the bearing portion.

[0026] According to one embodiment of the present invention, the support unit includes ball bearings that are rotatably disposed between the drive seat and the bearing portion.

[0027] According to one embodiment of the present invention, at least one of the drive seat and the bearing portion is provided with a track groove of the support unit, and the ball is rotatably held in the track groove.

[0028] According to one embodiment of the present invention, the inner lens group has two opposing arcuate edges and two opposing chamfered edges, wherein the driving part is disposed at a position corresponding to the arcuate edges of the inner lens group.

[0029] According to another aspect of the present invention, the present invention further provides a camera module, which includes a photosensitive component and a lens assembly disposed in the photosensitive path of the photosensitive component, wherein the lens assembly includes:

[0030] Outer lens group;

[0031] Focusing lens group;

[0032] The inner lens group, wherein the outer lens group, the focusing lens group and the inner lens group are arranged sequentially along the optical axis;

[0033] A support portion, wherein the focusing lens group is disposed on the support portion; and

[0034] A driving unit, wherein the driving unit includes a driving coil and a driving magnet corresponding to a position, and one of the driving coil and the driving magnet is disposed in the bearing unit. Attached Figure Description

[0035] Figure 1 This is a perspective view of a camera module according to a preferred embodiment of the present invention.

[0036] Figure 2A and Figure 2B These are cross-sectional schematic diagrams of different positions of the camera module according to the above-described preferred embodiments of the present invention.

[0037] Figure 3A and Figure 3B These are exploded schematic diagrams of the camera module according to the above-described preferred embodiments of the present invention from different perspectives.

[0038] Figure 4A and Figure 4B These are cross-sectional schematic diagrams showing different states of the camera module according to the above-described preferred embodiments of the present invention.

[0039] Figure 5 This is a cross-sectional schematic diagram of a camera module according to another preferred embodiment of the present invention.

[0040] Figure 6 This is a cross-sectional schematic diagram of a camera module according to another preferred embodiment of the present invention. Detailed Implementation

[0041] Before detailing any embodiment of the invention, it should be understood that the invention is not limited in its application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the following figures. The invention can have other embodiments and can be practiced or carried out in various ways. Furthermore, it should be understood that the wording and terminology used herein are for descriptive purposes and should not be considered limiting. The use of “comprising,” “including,” or “having,” and variations thereof is intended to cover the items set forth below and their equivalents, as well as any additional items. Unless otherwise specified or limited, the terms “installation,” “connection,” “support,” and “linkage,” and variations thereof are used broadly and cover both direct and indirect installation, connection, support, and linking. Moreover, “connection” and “linkage” are not limited to physical or mechanical connections or links.

[0042] Furthermore, firstly, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this 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 can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity.

[0043] See attached diagrams in the reference manual. Figures 1 to 4B A camera module according to a preferred embodiment of the present invention is disclosed and described in the following description, wherein the camera module includes a photosensitive component 10 and a lens component 20 disposed on the photosensitive component 10.

[0044] Specifically, see the attached document. Figures 1 to 4BThe photosensitive component 10 includes a circuit board 11, a photosensitive chip 12, and a lens mount 13. The photosensitive chip 12 is electrically connected to the circuit board 11. The lens mount 13 has a light-transmitting hole 131. The lens mount 13 is disposed on the circuit board 11, and the photosensitive chip 12 corresponds to the light-transmitting hole 131 of the lens mount 13. In this way, incident light is allowed to pass through the light-transmitting hole 131 of the lens mount 13 and reach the photosensitive area of ​​the photosensitive chip 12, so that the photosensitive chip 12 can perform photoelectric conversion to form an image.

[0045] Preferably, the photosensitive component 10 further includes at least one set of connecting lines 14, the photosensitive chip 12 is mounted on the circuit board 11, one end of the connecting line 14 is soldered to the chip pad of the photosensitive chip 12, and the other end of the connecting line 14 is soldered to the board pad of the circuit board 11, so as to electrically connect the photosensitive chip 12 and the circuit board 11 by the connecting line 14.

[0046] Preferably, refer to the appendix Figures 1 to 4B The lens mount 13 is a prefabricated component that is mounted on the circuit board 11, and the photosensitive chip 12 corresponds to the light-transmitting hole 131 of the lens mount 13.

[0047] Optionally, in the appendix Figure 5 In another preferred embodiment of the camera module shown, the lens mount 13 is integrally formed on the non-photosensitive area of ​​the circuit board 11 and the photosensitive chip 12, wherein the light-transmitting hole 131 of the lens mount 13 is formed simultaneously with the formation of the lens mount 13, and the photosensitive area of ​​the photosensitive chip 12 corresponds to the light-transmitting hole 131 of the lens mount 13. In this embodiment of the camera module, the lens mount 13 may embed the connecting wire 14 to prevent the connecting wire 14 from detaching from the circuit board 11 or the photosensitive chip 12.

[0048] Optionally, in other examples of the camera module of the present invention, the lens mount 13 is integrally formed on the circuit board 11, and there is a safe distance between the lens mount 13 and the photosensitive chip 12, so that after the lens mount 13 is integrally formed on the circuit board 11, the photosensitive chip 12 can be mounted on the circuit board 11 through the light-transmitting hole 131 of the lens mount 13.

[0049] Continue to refer to the appendix Figures 1 to 4B The photosensitive component 10 further includes at least one electronic component 15, which 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, and there is a safe distance between the electronic component 15 and the lens mount 13.

[0050] Optionally, in the appendix Figure 5 In another preferred embodiment of the camera module shown, the lens mount 13 integrally embeds the electronic component 15, that is, no safety distance is set between the electronic component 15 and the lens mount 13, which helps to reduce the length, width and height of the camera module.

[0051] Continue to refer to the appendix Figures 1 to 4B The photosensitive component 10 further includes a filter 16, which may be, but is not limited to, an infrared cut-off filter. The filter 16 is attached to the top surface of the lens mount 13 to maintain the filter 16 in the photosensitive path of the photosensitive chip 12. In this way, the incident light can be filtered out for a specific type of light when passing through the filter 16, which is beneficial to the subsequent clear imaging of the photosensitive chip 12.

[0052] Continue to refer to the appendix Figures 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 to a portable electronic device.

[0053] Continue to refer to the appendix Figures 1 to 4B The lens assembly 20 is mounted on the lens mount 13 of the photosensitive assembly 10 to maintain the light-sensing path of the lens assembly 20 to the photosensitive chip 12 of the photosensitive assembly 10, so that the incident light can reach the photosensitive chip 12 after passing through the light-transmitting hole 131 of the lens assembly 20, the filter 16 and the lens mount 13 in sequence, so as to allow the photosensitive chip 12 to perform photoelectric conversion and form an image.

[0054] 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, which helps to improve the imaging quality of the camera module. 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 optical length of the lens assembly 20 is not affected, thereby helping to reduce the height of the camera module and achieve miniaturization of the camera module, so as to meet the requirements of miniaturized openings of portable electronic devices.

[0055] For details, please refer to the appendix. Figures 1 to 4BThe lens assembly 20 includes an outer lens group 21, a focusing lens group 22, and an inner lens group 23. The outer lens group 21, the focusing lens group 22, and the inner lens group 23 are arranged sequentially along the optical axis to allow incident light to reach the photosensitive chip 12 after passing through the outer lens group 21, the focusing lens group 22, and the inner lens group 23 of the lens assembly 20 in sequence and through the filter 16 of the photosensitive assembly 10. Subsequently, the photosensitive chip 12 can perform photoelectric conversion to form an image.

[0056] 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 remain unchanged. The focusing lens group 22 of the lens assembly 20 is driven to move along the optical axis to change the position of the focusing lens group 22 relative to the outer lens group 21, the inner lens group 23 and the photosensitive chip 12.

[0057] The lens assembly 20 includes a housing 24, which further includes a housing 241, a base 242, and a focusing space 243. The housing 241 has a housing channel 2411, on which the outer lens group 21 is held above, and the outer lens group 21 corresponds to the housing channel 2411. The base 242 has a base channel 2421, on which the inner lens group 23 is disposed above, and the inner lens group 23 corresponds to the base channel 2421. The housing 241 and the base 242 are mounted to each other to form the focusing space 243 between them, wherein the focusing lens group 22 is drivably suspended between the outer lens group 21 and the inner lens group 23 within the focusing space 243 of the housing 24, thus enabling the lens assembly 20 to incorporate focusing functionality.

[0058] It is understood that the outer lens group 21 and the housing 24 form the general appearance of the lens assembly 20.

[0059] It is worth mentioning that the mounting method of the housing 241 and the base 242 of the outer casing 24 is not limited in the camera module of the present invention. For example, the housing 241 and the base 242 of the outer casing 24 can be installed by interlocking with each other, or the housing 241 and the base 242 can be glued together.

[0060] 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. Thus, when the camera module is used as a front-facing camera module of an electronic device, 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 for the camera module to obtain a larger field of view and light transmission, thereby improving the imaging quality of the camera module.

[0061] The lens assembly 20 further includes a lens carrier 25, which is mounted on the housing 241 of the outer casing 24 and protrudes into the housing channel 2411 of the housing 241. The outer lens group 21 is attached to the lens carrier 25, thus positioning the outer lens group 21 on the outer side of the housing 241. Optionally, in other examples of the camera module of the present invention, the outer lens group 21 may be directly mounted on the outer side of the housing 241 of the outer casing 24, positioning the outer lens group 21 on the upper side of the housing 241.

[0062] Specifically, the outer lens group 21 includes an outer lens barrel 211 and at least one outer lens element 212 mounted on the outer lens barrel 211. The end face of the outer lens barrel 211 of the outer lens group 21 can be attached to the lens carrier 25 using adhesives such as glue. Preferably, there is a gap between the end face of the outer lens barrel 211 of the outer lens group 21 and the lens carrier 25 to allow space for active calibration of the assembly position of the outer lens group 21 during assembly. After active calibration, 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 preventing dust and other contaminants from entering the interior of the lens assembly 20. More specifically, the outer lens group 21 includes two outer lens elements 212, wherein the two outer lens elements 212 are mounted on the outer lens barrel 211 along the height direction.

[0063] Reference Appendix Figure 3A and Figure 3BThe lens carrier 25 includes a carrier fixing element 251, a carrier arm 252, and a platform 253. The carrier arm 252 extends integrally inward from the carrier fixing element 251, and the platform 253 extends integrally upward from the carrier arm 252. The carrier fixing element 251 of the lens carrier 25 is mounted on the housing 241 of the outer shell 24, thereby holding the carrier fixing element 251 in the focusing space 243 of the outer shell 24. The platform 253 protrudes into the housing channel 2411 of the housing 241. The outer lens barrel 211 of the outer lens group 21 is attached to the platform 253 of the lens carrier 25, thus positioning the outer lens group 21 on the upper side of the housing 241 via the lens carrier 25.

[0064] The inner lens group 23 is disposed on the upper side of the base 242 of the housing 24 to maintain the inner lens group 23 in the focusing space 243 of the housing 24, thereby preventing the inner lens group 23 from protruding downward from the base 242. In this way, the base 242 of the housing 24 can be directly attached to the lens mount 13 to set the lens assembly 20 on the photosensitive assembly 10.

[0065] Specifically, the inner lens group 23 includes an inner lens barrel 231 and at least one inner lens 232 mounted on the inner lens barrel 231. The end face of the inner lens barrel 231 is attached to the upper side of the base 242 of the housing 24 to position the inner lens group 23 on the upper side of the base 242. More specifically, the inner lens group 23 includes two inner lens 232, which are mounted on the inner lens barrel 231 along the height direction.

[0066] Preferably, the end face of the inner lens barrel 231 of the inner lens group 23 and the upper side of the base 242 are attached together by an adhesive such as glue. The adhesive can fix the calibrated inner lens group 23 and 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 prevent dust and other contaminants from entering the interior of the lens assembly 20.

[0067] The focusing lens group 22 further includes a focusing lens barrel 221 and at least one focusing lens 222 mounted on the focusing lens barrel 221. The outer lens 212 of the outer lens group 21, the focusing lens 222 of the focusing lens group 22, and the inner lens 232 of the inner lens group 23 form a complete optical system. As the position of the focusing lens group 22 relative to the outer lens group 21 and the inner lens group 23 changes, the focal position of the optical system is changed to achieve focusing of the camera module.

[0068] Continue to refer to the appendix Figures 1 to 4B The lens assembly 20 further includes a drive unit 26 and a support unit 27 drivably connected to the drive unit 26. The focusing lens group 22 is disposed on the support unit 27. The drive unit 26 is configured to drive the focusing lens group 22 to move along the optical axis between the outer lens group 21 and the inner lens group 23 via the support unit 27 to achieve focusing of the camera module.

[0069] Preferably, the bottom of the support portion 27 extends to the outside of the inner lens group 23 and is drivably connected to the drive portion 26, so that the drive portion 26 sinks to the outside of the inner lens group 23. This helps to reduce the length, width and height space occupied by the drive portion 26 of the camera module, thereby reducing the length and width dimensions of the camera module and lowering the height dimension of the camera module.

[0070] Preferably, the inner lens group 23 is a dual-sided D-CUT lens group, so that the inner lens group 23 has two opposing arc edges 233 and two opposing chamfered edges 234, wherein the driving part 26 is disposed at the position corresponding to the arc edges 233 of the inner lens group 23, which is beneficial to narrow the camera module and further reduce the width of the camera module.

[0071] Reference Appendix Figure 3A and Figure 3BThe support portion 27 includes a bottom support element 271, a top support element 272, and at least one extension arm 273, wherein the extension arm 273 extends integrally upward and inward from the bottom support element 271 to the top support element 272, such that the height of the top support element 272 is higher than the height of the bottom support element 271. The bottom support element 271 has a retaining cavity 2711, in which the inner lens group 23 is retained, allowing the bottom of the support portion 27 to extend to the outside of the inner lens group 23. The focusing lens barrel 221 of the focusing lens group 22 is attached to the top support element 272 of the support portion 27. For example, the top support element 272 is ring-shaped. After the focusing lens group 22 is installed in the top support element 272 of the support part 27 and the focusing lens group 22 is actively calibrated, adhesives such as glue can be used to fix the focusing lens barrel 221 of the focusing lens group 22 and the top support element 272 of the support part 27.

[0072] It is worth mentioning that the number of the extension arms 273 of the supporting portion 27 is not limited in the camera module of the present invention. For example, in the attached... Figures 1 to 4B In this specific example of the camera module shown, the support portion 27 includes four extension arms 273, which are preferably distributed at equal intervals. Optionally, in other specific examples of the camera module of the present invention, the number of extension arms 273 of the support portion 27 may be two, three, five, six, or more.

[0073] Continue to refer to the appendix Figure 3A and Figure 3B The lens carrier 25 has at least one carrier clearance space 254. The position of the extension arm 273 of the carrier portion 27 corresponds to the position of the carrier clearance space 254 of the lens carrier 25. When the driving portion 26 drives the focusing lens group 22 to move along the optical axis direction through the carrier portion 27, the extension arm 273 of the carrier portion 27 can enter the carrier clearance space 254 of the lens carrier 25 to allow the lens carrier 25 to avoid the carrier portion 27. In this way, the carrier portion 27 and the focusing lens group 22 have a larger travel, so that the camera module can focus over a larger range.

[0074] Preferably, the outer lens barrel 211 of the outer lens group 21 has at least one lens clearance space 2111, and the lens clearance space 2111 of the outer lens barrel 211 corresponds to and communicates with the carrier clearance space 254 of the lens carrier 25. When the driving part 26 drives the focusing lens group 22 to move along the optical axis direction through the carrier part 27, the extension arm 273 of the carrier part 27 can enter the carrier clearance space 254 of the lens carrier 25 and the lens clearance space 2111 of the outer lens barrel 211. In this way, the carrier part 27 and the focusing lens group 22 have a larger stroke, so that the camera module can focus over a larger range. Preferably, the outer lens barrel 211 of the outer lens group 21 further has a lens clearance groove 2112, which is connected to the lens clearance space 2111. The focusing lens group 22 can enter the lens clearance groove 2112 of the outer lens barrel 211 to allow the outer lens group 21 to avoid the focusing lens group 22, thus allowing the camera module to focus over a larger range.

[0075] Furthermore, the driving unit 26 includes a driving coil 261 and a driving magnet 262 positioned correspondingly, wherein in the attached Figures 1 to 4B In this specific example of the camera module shown, the driving magnet 262 is disposed on the support portion 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 interact to drive the support portion 27 and the focusing lens group 22 to move along the optical axis, thereby achieving focusing of the camera module. Optionally, in other examples of the camera module of the present invention, the driving coil 261 is disposed on the support portion 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 interact to drive the support portion 27 and the focusing lens group 22 to move along the optical axis, thereby achieving focusing of the camera module.

[0076] Preferably, refer to the appendix. Figures 1 to 4B The driving magnet 262 of the driving unit 26 is disposed on the bottom support element 271 of the support unit 27, so that the driving unit 26 is lowered to the outside of the inner lens group 23, which helps to reduce the length, width and height space occupied by the driving unit 26 in the camera module. More preferably, the bottom support element 271 has an insert groove 2712, and the driving magnet 262 is inserted into the insert groove 2712 of the bottom support element 271, which helps to reduce the length and width dimensions of the camera module.

[0077] Continue to refer to the appendix Figures 1 to 4B The lens assembly 20 includes a drive base 28 disposed adjacent to the support portion 27, and the drive coil 261 is disposed on the drive base 28. In other words, the drive base 28 is used to hold the drive coil 261 at a position corresponding to the drive magnet 262.

[0078] Preferably, the drive seat 28 has a through-hole shaped seat space 281, wherein the bottom support element 271 of the support portion 27 is movably held in the seat space 281 of the drive seat 28 so that the drive coil 261 is held by the drive seat 28 at a position corresponding to the drive magnet 262.

[0079] Preferably, the drive seat 28 is disposed on the base 242 of the housing 24. For example, the drive seat 28 and the base 242 of the housing 24 can be bonded together with an adhesive such as glue to dispose the drive seat 28 on the base 242 of the housing 24. Optionally, the drive seat 28 and the base 242 of the housing 24 are integrally formed, that is, the drive seat 28 extends integrally upward from the base 242 of the housing 24. Optionally, the drive seat 28 is disposed on the housing 241 of the housing 24, or the drive seat 28 and the housing 241 of the housing 24 are integrally formed.

[0080] Preferably, the carrier fixing element 251 of the lens carrier 25 is mounted on the drive seat 28 to hold the carrier fixing element 251 in the focusing space 243 of the housing 24.

[0081] Furthermore, the drive base 28 has a coil receiving cavity 282 that extends outward from the base space 281, wherein the drive coil 261 is received in the coil receiving cavity 282 of the drive base 28, which helps to reduce the length and width dimensions of the camera module.

[0082] Continue to refer to the appendix Figures 1 to 4B The driving unit 26 includes a circuit board 263, to which the driving coil 261 is electrically connected, so that the circuit board 263 supplies power to the driving coil 261. For example, the circuit board 263 of the driving unit 26 can be electrically connected to the circuit board 11 of the photosensitive assembly 10, wherein when 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.

[0083] Preferably, the coil receiving cavity 282 of the drive base 28 is a through hole, and the drive coil 261 is mounted on the circuit board 263, wherein the circuit board 263 is mounted on the outer wall of the drive base 28 to hold the drive coil 261 in the coil receiving cavity 282 of the drive base 28. Preferably, the drive base 28 has a slot 283, and the circuit board 263 is mounted in the slot 283 of the drive base 28 to help reduce the length and width dimensions of the camera module.

[0084] Continue to refer to the appendix Figures 1 to 4B The lens assembly 20 further includes a suspension portion 29, which includes a magnetic attraction unit 291 and at least one support unit 292. The magnetic attraction unit 291 is disposed on the drive base 28, and its position corresponds to the position of the drive magnet 262 of the drive portion 26, allowing the magnetic attraction unit 291 and the drive magnet 262 to attract each other due to magnetic attraction, causing the bottom support element 271 of the support portion 27 to tend to move closer to the drive base 28. The support unit 292 is disposed between the outer wall of the bottom support element 271 of the support portion 27 and the inner wall of the drive base 28 to prevent the bottom support element 271 of the support portion 27 from moving closer to the drive base 28. Thus, the suspension portion 29 suspends the support portion 27 in the focusing space 243 of the housing 24. Preferably, the magnetic attraction unit 291 is attached to the circuit board 263 of the drive portion 26.

[0085] Furthermore, the support unit 292 includes at least two balls 2921 that are rollably held between the outer wall of the bottom support element 271 and the inner wall of the drive seat 28 to prevent the bottom support element 271 from approaching the drive seat 28 and to allow the drive unit 26 to smoothly drive the support unit 27 and the focusing lens group 22 to move along the optical axis. Preferably, each end of the drive magnet 262 is held by at least one of the balls 2921 to prevent the support unit 27 from tilting.

[0086] Preferably, the support unit 292 has two first track grooves 2922 and two second track grooves 2923 extending along the optical axis. The two first track grooves 2922 are disposed on the bottom support element 271 of the support portion 27, and the two first track grooves 2922 are held on opposite sides of the fitting groove 2712 of the bottom support element 271. The two second track grooves 2923 are disposed on the drive seat 28, and the two second track grooves 2923 are held on opposite sides of the seat groove 283. A portion of the ball bearing 2921 is rotatably held in the first track groove 2922 and a portion is held in the second track groove 2923. The ball bearing 2921 creates a gap between the outer wall of the bottom support element 271 and the inner wall of the drive seat 28, so that the ball bearing 2921 is rotatably held between the outer wall of the bottom support element 271 and the inner wall of the drive seat 28.

[0087] Continue to refer to the appendix Figures 1 to 4B The lens assembly 20 further includes a dust cover 210, which is attached to the housing 241 of the outer casing 24 to seal the housing channel 2411 of the housing 241, thereby preventing dust and other contaminants from entering the interior of the lens assembly 20 through the housing channel 2411 of the housing 241.

[0088] In addition, Figures 1 to 4B The assembly process of the lens assembly 20 of the camera module shown is as follows.

[0089] Step S1: Install the lens carrier 25 inside the housing 241 through the bottom opening of the housing 241 of the outer shell 24, wherein the carrier fixing element 251 of the lens carrier 25 is located inside the housing 241, and the stage 253 of the lens carrier 25 protrudes into the housing channel 2411 of the housing 241.

[0090] Step S2: The mounting base 28, which houses the drive coil 261, the circuit board 263, and the magnetic unit 291, is installed inside the housing 241 through the bottom opening of the housing 241 of the outer shell 24. The position of the drive coil 261 corresponds to that of the magnetic unit 291, and the drive coil 261 and the magnetic unit 291 are located on opposite sides of the circuit board 263.

[0091] Step S3: The support portion 27, in which the driving magnet 262 and a standard lens are mounted, is installed inside the housing 241 of the outer casing 24 through the bottom opening of the housing 241. The driving magnet 262 is positioned corresponding to the driving coil 261 and the magnetic attraction unit 291, respectively. The support unit 292 is held between the inner wall of the driving seat 28 and the outer wall of the bottom support element 271 of the support portion 27, so that the support portion 27 is suspended by the magnetic attraction force generated by the driving magnet 262 and the magnetic attraction unit 291 and the support unit 292. The standard lens 27 is temporarily placed on the top support element 272 of the support portion 27, and the standard lens 27 can extend out of the housing 241 through the housing passage 2411 of the housing 241, corresponding to the carrier clearance space 254 of the lens carrier 25.

[0092] Step S4: Pre-fix the inner lens group 23 to the base 242 of the housing 24.

[0093] 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 retaining cavity 2711 of the bottom support element 271 of the support portion 27. At this time, the standard lens and the inner lens group 23 form an optical system capable of imaging.

[0094] Step S6: Actively calibrate the inner lens group 23. Specifically, firstly, power is applied to the calibration photosensitive component so that light passing through the standard lens and the inner lens group 23 reaches the photosensitive chip of the calibration photosensitive component to form an image; secondly, an image algorithm determines an adjustment amount based on the image quality; thirdly, the relative position of the inner lens group 23 is adjusted in at least one direction (X, Y, Z axis directions and rotational directions around the X, Y, Z axes) according to the adjustment amount, so that the image quality (mainly including optical parameters such as peak value, field curvature, and astigmatism) reaches the target value, thereby completing the calibration of the inner lens group 23. After calibrating the relative position of the inner lens group 23, the base 242 of the housing 24 is fixed.

[0095] In step S7, the outer lens group 23 is pre-fixed to 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 optical system capable of imaging.

[0096] Step S8: Actively calibrate the outer lens group 21. First, power is applied to the calibration photosensitive component so that 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 to form an image. Second, an image algorithm determines an adjustment amount based on the image quality. Third, the relative position of the outer lens group 21 is adjusted in at least one direction (X, Y, Z axis directions and rotational directions around the X, Y, Z axes) according to the adjustment amount, so that the image quality (mainly including optical parameters such as peak value, field curvature, and astigmatism) reaches the target value, thereby completing the calibration of the outer lens group 21. After calibrating the relative position of the outer lens group 21, the stage 253 of the lens carrier 25 is fixed to fix the outer lens group 21 and the lens carrier 25.

[0097] Step S9: The standard lens is replaced by the focusing lens group 22. Specifically, firstly, the standard lens is moved laterally (perpendicular to the optical axis of the camera module) from the outside of the housing 241 through the carrier clearance space 254 of the lens carrier 25 to remove the standard lens; secondly, the focusing lens group 22 is moved laterally from the outside of the housing 241 through the carrier clearance space 254 of the lens carrier 25 to move into the inner lens group 22, wherein the moved-in inner lens group 22 is pre-fixed to the top carrier element 271 of the carrier part 27. At this time, the outer lens group 21, the focusing lens group 22 and the inner lens group 23 form an optical system capable of imaging.

[0098] Step S10: Actively calibrate the focusing lens group 22. First, power is applied to the calibration photosensitive component so that light passing through the outer lens group 21, the focusing lens group 22, and the inner lens group 23 reaches the photosensitive chip of the calibration photosensitive component to form an image. Second, an image algorithm determines an adjustment amount based on the image quality. Third, the relative position of the focusing lens group 22 is adjusted in at least one direction (X, Y, Z axis directions and rotational directions around the X, Y, Z axes) according to the adjustment amount, so that the image quality (mainly including optical parameters such as peak value, field curvature, and astigmatism) reaches the target value, thereby completing the calibration of the focusing lens group 22. After the relative position of the focusing lens group 22 is calibrated, the focusing lens group 22 and the top support element 272 of the support part 27 are fixed.

[0099] Step S11: Install the dust cover 210 onto the housing 241 of the outer casing 24 so that the housing channel 2411 of the housing 241 is closed by the dust cover 210.

[0100] Appendix Figure 6 The camera module shown is based on another preferred embodiment of the invention, and is accompanied by an appendix. Figures 1 to 4BThe difference between the camera module shown and the one in question is that, in the attached... Figure 6 In this specific example of the camera module shown, the end face of the bottom support element 271 of the support portion 27 is drivably connected to the drive portion 26, so that the drive portion 26 drives the support portion 27 and the focusing lens group 22 to move in the optical axis direction at the bottom of the support portion 27 to achieve focusing of the camera module.

[0101] Specifically, the driving unit 26 includes a first piezoelectric sheet 264, a deformable electrode sheet 265, and a second piezoelectric sheet 266 stacked sequentially. The electrode sheet 265 has an electrode terminal 2651, which is electrically connected to the negative terminal of a power control unit. The first piezoelectric sheet 264 has a first electrode layer 2641 and a second electrode layer 2642 on opposite sides, respectively. The second electrode layer 2642 of the first piezoelectric sheet 264 is connected to the electrode sheet 265, and the first electrode layer 2641 is electrically connected to the positive terminal of the power control unit. The second piezoelectric sheet 266 has a third electrode layer 2661 and a fourth electrode layer 2662 on opposite sides, respectively. 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 pulse voltage between the first electrode layer 2641 of the first piezoelectric element 264, the third electrode layer 2661 of the second piezoelectric element 266, and the electrode sheet 265, the first electrode layer 2641 of the first piezoelectric element 264 and the third electrode layer 2661 of the second piezoelectric element 266 are energized and extend and retract, allowing the cross-sectional shape of the drive part 26 to be an upwardly convex arc (e.g., bowl-shaped). At this time, the drive part 26 drives the support part 27 and the focusing lens group 22 to move along the optical axis away from the photosensitive component 10 from the bottom of the support part 27. Accordingly, when the power control unit repeatedly applies pulse voltage between the second electrode layer 2642 of the first piezoelectric element 264 and the fourth electrode layer 2662 of the second piezoelectric element 266 and the electrode sheet 265, the second electrode layer 2642 of the first piezoelectric element 264 and the fourth electrode layer 2662 of the second piezoelectric element 266 are energized and stretched to allow the cross-sectional shape of the drive part 26 to be concave arc (e.g., bowl-shaped). At this time, the drive part 26 drives the support part 27 and the focusing lens group 22 to move along the optical axis toward the photosensitive component 10 from the bottom of the support part 27.

[0102] Preferably, the electrode plate 265 of the drive unit 26 is a metal plate to allow the electrode plate 265 to have good elasticity, so that when the power control unit is powered off, the elasticity of the electrode plate 265 can enable the drive unit 26 to quickly return to its initial state.

[0103] Preferably, the drive unit 26 is annular and surrounds the inner lens group 23.

[0104] 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.

[0105] It is worth mentioning that the drive unit 26 can be disposed on the drive seat 28, or the drive unit 28 can be directly disposed on the base 242 of the housing 24.

[0106] It will be understood by those skilled in the art that the above embodiments are merely examples, and features of different embodiments can be combined with each other to obtain implementation methods that are readily conceivable according to the content disclosed in the present invention but are not explicitly shown in the accompanying drawings.

[0107] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and any variations or modifications may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A lens assembly, characterized in that, include: Outer lens group; Focusing lens group; The inner lens group, wherein the outer lens group, the focusing lens group and the inner lens group are arranged sequentially along the optical axis; A support unit, wherein the focusing lens group is disposed in the support unit; as well as A driving unit, wherein the driving unit includes a driving coil and a driving magnet corresponding to a position, one of the driving coil and the driving magnet being disposed in the support unit, wherein the bottom of the support unit extends to the outside of the inner lens group, the inner lens group having two opposing arc edges and two opposing chamfered edges, wherein the driving unit is disposed at a position corresponding to the arc edges of the inner lens group.

2. The lens assembly of claim 1, wherein the support portion includes a bottom support element, a top support element, and an extension arm that extends integrally upward and inward from the bottom support element to the top support element, wherein the bottom support element has a retaining cavity in which the inner lens group is retained, wherein one of the drive coil and the drive magnet is disposed on the bottom support element, and wherein the focusing lens group is disposed on the top support element.

3. The lens assembly according to claim 2, further comprising a lens carrier, wherein the outer lens group is disposed on the lens carrier, wherein the lens carrier has a carrier clearance space, the carrier clearance space of the lens carrier corresponding to the extension arm of the support portion to allow the extension arm of the support portion to enter the carrier clearance space of the lens carrier.

4. The lens assembly according to claim 3, wherein the outer lens group has a lens clearance space, and the lens clearance space of the outer lens group corresponds to and is connected to the carrier clearance space of the lens carrier.

5. The lens assembly according to claim 4, wherein the outer lens group has a lens clearance groove, and the lens clearance space is connected to the lens clearance groove.

6. The lens assembly according to any one of claims 1 to 5, further comprising a drive mount disposed adjacent to the support portion, wherein the drive coil is disposed on the drive mount and the drive magnet is disposed on the support portion.

7. The lens assembly according to claim 6, wherein the carrier has an insert groove, the driving magnet is inserted into the insert groove of the carrier, and correspondingly, the driving seat has a coil receiving cavity, the driving coil being received in the coil receiving cavity of the driving seat.

8. The lens assembly of claim 7, wherein the driving unit includes a circuit board, the driving coil is mounted on the circuit board, wherein the coil receiving cavity of the driving seat is through-hole shaped, and the circuit board is mounted on the driving seat to hold the driving coil in the coil receiving cavity of the driving seat.

9. The lens assembly of claim 8, wherein the drive mount has a slot, and the circuit board is located in the slot of the drive mount.

10. The lens assembly of claim 6, further comprising a suspension portion including a magnetic unit and a support unit, wherein the magnetic unit is disposed on the drive seat and the position of the magnetic unit corresponds to the position of the drive magnet to generate a magnetic attraction between them, wherein the support unit is disposed between the drive seat and the bearing portion.

11. The lens assembly of claim 10, wherein the support unit includes a ball bearing that is rotatably disposed between the drive seat and the support portion.

12. The lens assembly of claim 11, wherein at least one of the drive mount and the carrier is provided with a track groove of the support unit, and the ball is rotatably held in the track groove.

13. A camera module, characterized in that, include: Photosensitive components; and The lens assembly according to any one of claims 1 to 12, wherein the lens assembly is disposed in the light-sensing path of the photosensitive assembly.

Images