Camera module and inner focusing optical lens thereof

Abstract

The application discloses an inner focusing optical lens of a camera module, which comprises a subject side lens group, a focusing lens group, an image side lens group and a shell. The subject side lens group is attached to the outside of the shell. The image side lens group is fixedly arranged in the inside of the shell. The focusing lens group is drivably arranged in the inside of the shell. The subject side lens group, the focusing lens group and the image side lens group are coaxial with an optical axis, so that the inner focusing optical lens integrates a focusing function.

Description

Technical Field

[0001] This invention relates to an optical imaging device, and more particularly to a camera module and its internal focusing optical lens. Background Technology

[0002] In recent years, while pursuing thinner and lighter portable electronic devices (such as smartphones), people have placed increasingly higher demands on the image quality of camera modules configured in these devices. Classified by whether the focal length can be adjusted, camera modules include zoom camera modules and fixed-focus camera modules. The difference lies in whether they are equipped with a driver to move the optical lens along the optical axis of the camera module. Specifically, zoom camera modules are equipped with a driver to adjust the focal length by moving the optical lens along the optical axis of the camera module. Fixed-focus camera modules are not equipped with a driver, so the relative distance between the optical lens and the image sensor cannot be adjusted. While zoom camera modules offer better image quality, the driver prevents them from being miniaturized, making them unsuitable for the front of thinner and lighter portable electronic devices. Fixed-focus camera modules, lacking a driver, are smaller in size. Therefore, current portable electronic devices typically use fixed-focus camera modules as front-facing cameras. However, the drawback of fixed-focus camera modules is their poor imaging capabilities, which cannot meet people's demands for the imaging quality of front-facing camera modules. Summary of the Invention

[0003] One object of the present invention is to provide a camera module and its internal focusing optical lens, wherein the camera module does not affect the total optical length of the internal focusing optical lens during focusing, thereby facilitating the reduction of the height of the camera module and achieving miniaturization. Thus, the camera module with focusing function can be applied to the front of portable electronic devices as a front-facing camera module.

[0004] One object of the present invention is to provide a camera module and its internal focusing optical lens, wherein the internal focusing optical lens provides an object-side lens group, an image-side lens group, and a focusing lens group, the focusing lens group being drivable to move along the optical axis of the camera module, so as to achieve focusing of the camera module by changing the position of the focusing lens group relative to the object-side lens group and the image-side lens group, so that during focusing, the position of the object-side lens group and the image-side lens group relative to the photosensitive element remains unchanged, thereby not affecting the total optical length of the internal focusing optical lens.

[0005] One object of the present invention is to provide a camera module and its internal focusing optical lens, wherein the internal focusing optical lens is provided with a housing, and the focusing lens group is drivably held in a housing space of the housing to allow the internal focusing optical lens to have internal focusing function.

[0006] One object of the present invention is to provide a camera module and its internal focusing optical lens, wherein the object-side lens group is mounted and protrudes from the housing to allow the internal focusing optical lens to adopt a "small head" design. Thus, when the camera module is used as a front-facing camera module of a portable electronic device, the object-side lens group can be closer to the screen opening of the portable electronic device, thereby enabling the camera module to obtain a larger field of view and light transmission, thereby improving the imaging quality of the camera module.

[0007] One object of the present invention is to provide a camera module and its internal focusing optical lens, wherein the internal focusing optical lens of the camera module adopts a "small head" design, so that when the camera module is used as a front camera module of a portable electronic device, it does not increase the screen opening size, thus meeting the requirement of miniaturization of the opening.

[0008] One object of the present invention is to provide a camera module and a focusing optical lens therein, wherein the size of the object-side lens group is larger than the size of the focusing lens group, so that the object-side lens group can be easily mounted on the housing based on the focusing lens group being drivably held in the housing space of the housing, thereby making the structure of the camera module more reasonable.

[0009] One object of the present invention is to provide a camera module and its internal focusing optical lens, wherein the internal focusing optical lens provides a driving unit, the driving unit allowing the focusing lens group to be held in a suspended manner in the housing space of the housing, and the driving unit is used to drive the focusing lens group to move along the optical axis of the camera module to achieve focusing of the camera module.

[0010] One object of the present invention is to provide a camera module and its internal focusing optical lens, wherein a coil of the driving unit is recessed to facilitate a reduction in the height of the camera module, thereby making the camera module suitable for portable electronic devices that seek to be thinner and lighter.

[0011] One object of the present invention is to provide a camera module and its internal focusing optical lens, wherein the housing has at least one clearance space to allow clearance for at least one extension arm of the drive unit, such that the focusing lens group has a greater travel range to improve the imaging effect of the camera module.

[0012] One object of the present invention is to provide a camera module and its internal focusing optical lens, wherein the object-side lens group has a clearance groove to avoid a protrusion of the focusing lens group, such that the focusing lens group has a larger travel range, which is beneficial to improving the imaging effect of the camera module.

[0013] According to one aspect of the present invention, an internal focusing optical lens is provided, comprising:

[0014] A group of side-view cameras;

[0015] A group of focusing lenses;

[0016] A group of side-view cameras; and

[0017] A housing, wherein the object-side lens group is mounted on the outside of the housing, wherein the image-side lens group is fixedly disposed inside the housing, wherein the focusing lens group is drivably disposed inside the housing, and wherein the object-side lens group, the focusing lens group and the image-side lens group are coaxial.

[0018] According to one embodiment of the present invention, the internal focusing optical lens further includes a driving unit, the driving unit including a fixing part, a carrier part and a driving part, wherein the fixing part is disposed on the inner side of the housing or the fixing part and the housing are integrally formed, wherein the carrier part has a carrier outer side and a carrier inner side corresponding to the carrier outer side, the carrier outer side of the carrier part extends outward to a position adjacent to the fixing part, and the carrier inner side of the carrier part extends inward to the upper side of the object-side lens group, so as to keep the zoom lens group mounted on the carrier inner side of the carrier part above the image-side lens group.

[0019] According to one embodiment of the present invention, the driving part includes at least one magnet and at least one coil, the magnet is fixedly disposed on the fixed part, the coil is fixedly disposed on the bearing outer side of the bearing part, and the position of the magnet corresponds to the position of the fixed part.

[0020] According to one embodiment of the present invention, the driving part includes at least two magnets and a coil, at least one pair of magnets are arranged opposite to each other, and the coil is wound around the outer side of the bearing part.

[0021] According to one embodiment of the present invention, the height position of the outer side of the bearing portion is lower than the height position of the inner side of the bearing portion.

[0022] According to one embodiment of the present invention, the bearing portion includes a driven ring, a bearing ring, and at least one extension arm extending between the driven ring and the bearing ring. The driven ring forms the bearing outer side of the bearing portion, and the bearing ring forms the bearing inner side of the bearing portion. At least a portion of the extension arm is inclined such that the height position of the bearing outer side is lower than the height position of the bearing inner side.

[0023] According to one embodiment of the present invention, the extension arm of the bearing portion has a lower horizontal extension portion, an upper horizontal extension portion, and an inclined extension portion. The lower horizontal extension portion extends integrally inward from the driven member, and the upper horizontal extension portion extends integrally outward from the bearing ring. The opposite ends of the inclined extension portion extend to and are connected to the lower horizontal extension portion and the upper horizontal extension portion, respectively. Alternatively, the extension arm of the bearing portion has a lower horizontal extension portion and an inclined extension portion. The lower horizontal extension portion extends integrally inward from the driven member, and the opposite ends of the inclined extension portion extend to and are connected to the lower horizontal extension portion and the bearing ring, respectively. Alternatively, the extension arm of the bearing portion has an inclined extension portion and an upper horizontal extension portion. The upper horizontal extension portion extends integrally outward from the bearing ring, and the opposite ends of the inclined extension portion extend to and are connected to the driven member and the upper horizontal extension portion, respectively. Alternatively, the extension arm of the bearing portion is inclined overall.

[0024] According to one embodiment of the present invention, the housing has at least one clearance space to avoid the support portion.

[0025] According to one embodiment of the present invention, the housing has at least one clearance space to allow the extension arm of the support portion to pass.

[0026] According to one embodiment of the present invention, the internal focusing optical lens is further covered, the bottom side of the cover extending to the housing and the inner side of the cover extending to the object-side lens group, so as to allow the cover to close the clearance space.

[0027] According to one embodiment of the present invention, the outer diameter of the object-side lens group is larger than the outer diameter of the focusing lens group.

[0028] According to one embodiment of the present invention, the object-side lens barrel of the object-side lens group has a clearance groove to avoid the protrusion of the focusing lens barrel of the focusing 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 an internal focusing optical lens disposed in the photosensitive path of the photosensitive component, wherein the internal focusing optical lens further includes:

[0030] A group of side-view cameras;

[0031] A group of focusing lenses;

[0032] A group of side-view cameras; and

[0033] A housing, wherein the object-side lens group is mounted on the outside of the housing, wherein the image-side lens group is fixedly disposed inside the housing, wherein the focusing lens group is drivably disposed inside the housing, and wherein the object-side lens group, the focusing lens group and the image-side lens group are coaxial. Attached Figure Description

[0034] Figure 1 This is a perspective view of a camera module according to a first preferred embodiment of the present invention.

[0035] Figure 2A This is a cross-sectional view of the camera module according to the above-described preferred embodiment of the present invention.

[0036] Figure 2B This is a cross-sectional view of the camera module according to the preferred embodiment of the present invention from another direction.

[0037] Figure 3A This is a cross-sectional schematic diagram of one state of the camera module according to the above-described preferred embodiment of the present invention.

[0038] Figure 3B This is a cross-sectional schematic diagram of another state of the camera module according to the above-described preferred embodiment of the present invention.

[0039] Figure 4A This is an exploded view of an optical lens of the camera module according to the above-described preferred embodiment of the present invention.

[0040] Figure 4B This is an exploded view of the internal focusing optical lens of the camera module according to the above-described preferred embodiment of the present invention.

[0041] Figure 5 This is a cross-sectional schematic diagram of a modified embodiment of the camera module according to the above-described preferred embodiment of the present invention.

[0042] Figure 6 This is a cross-sectional schematic diagram of another modified embodiment of the camera module according to the above-described preferred embodiment of the present invention.

[0043] Figure 7 This is a perspective view of a camera module according to a second preferred embodiment of the present invention.

[0044] Figure 8 This is a cross-sectional view of the camera module according to the above-described preferred embodiment of the present invention.

[0045] Figure 9A This is a cross-sectional schematic diagram of one state of the camera module according to the above-described preferred embodiment of the present invention.

[0046] Figure 9B This is a cross-sectional schematic diagram of another state of the camera module according to the above-described preferred embodiment of the present invention.

[0047] Figure 10A This is an exploded view of an optical lens of the camera module according to the above-described preferred embodiment of the present invention.

[0048] Figure 10B This is an exploded view of the internal focusing optical lens of the camera module according to the above-described preferred embodiment of the present invention.

[0049] Figure 11 This is a schematic diagram illustrating the assembly process of the internal focusing optical lens of the camera module according to the above-described preferred embodiment of the present invention. Detailed Implementation

[0050] 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.

[0051] 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.

[0052] Refer to the accompanying drawings of the specification of this invention. Figures 1 to 4B A camera module according to a preferred embodiment of the present invention will be disclosed and described in the following description, wherein the camera module includes a photosensitive component 100 and an internal focusing optical lens 200 disposed on the photosensitive component 100.

[0053] Specifically, see the attached document. Figures 1 to 3B The photosensitive assembly 100 includes a circuit board 101, a photosensitive chip 102, a lens mount 103, and a filter 104. The photosensitive chip 102 is mounted on the circuit board 101. The lens mount 103 is disposed on the circuit board 101 such that it at least surrounds the photosensitive area of ​​the photosensitive chip 102. The filter 104 is mounted on the top side of the lens mount 103 such that it is held in the photosensitive path of the photosensitive chip 102. The internal focusing optical lens 200 is directly disposed on the lens mount 103. Incident light, after passing sequentially through the internal focusing optical lens 200 and the filter 104 of the photosensitive assembly 100, can be received by the photosensitive chip 102, so that the photosensitive chip 102 can subsequently perform photoelectric conversion to form an image.

[0054] Preferably, the lens mount 103 is integrally formed on the circuit board 101. This eliminates the need for an adhesive layer between the lens mount 103 and the circuit board 101, reducing the height of the camera module. Furthermore, the lens mount 103 reinforces the circuit board 101, ensuring its flatness. Preferably, the lens mount 103 may further embed a portion of the non-photosensitive area of ​​the photosensitive chip 102, thus integrally combining the lens mount 103 with both the circuit board 101 and the photosensitive chip 102.

[0055] In addition, the photosensitive component 100 further includes at least one electronic component 105, wherein the electronic component 105 is mounted on the circuit board 101, and the lens mount 103 may embed the electronic component 105.

[0056] Continue to refer to the appendix Figures 1 to 4B The internal focusing optical lens 200 includes a housing 10, an object-side lens group 20, a focusing lens group 30, and an image-side lens group 40. The housing 10 has a housing space 11 and a top opening 12 and a bottom opening 13 respectively communicating with the housing space 11. The object-side lens group 20 is mounted to and protrudes from the housing 10 in such a manner that it corresponds to the top opening 12 of the housing 10. The focusing lens group 30 is positioned such that it corresponds to... The top opening 12 of the housing 10 is drivably disposed in the housing space 11 of the housing 10, wherein the image-side lens group 30 is fixedly disposed in the housing space 11 of the housing 10, and the object-side lens group 20, the focusing lens group 30, and the image-side lens group 40 are arranged sequentially along the optical axis of the inner focusing optical lens 200, thus integrating the object-side lens group 20, the focusing lens group 30, and the image-side lens group 40 into a single unit by the housing 10. In this manner, incident light, after passing sequentially through the object-side lens group 20, the focusing lens group 30, and the image-side lens group 40 of the inner focusing optical lens 200, and the filter 104 of the photosensitive assembly 100, can be received by the photosensitive chip 102.

[0057] It should be noted that the focusing lens group 30 is configured to move along the optical axis of the inner focusing optical lens 200, thereby changing the position of the focusing lens group 30 relative to the object-side lens group 20 and the image-side lens group 40 to achieve focusing of the camera module. In this way, during the focusing process of the camera module, the positions of the object-side lens group 20 and the image-side lens group 40 relative to the photosensitive component 100 remain unchanged, so as not to affect the total optical length of the inner focusing optical lens 200.

[0058] In other words, during the focusing process of the camera module, the position and size of the exposed components of the internal focusing optical lens 200 do not change. That is, the position and size of the housing 10 and the object-side lens group 20 of the internal focusing optical lens 200 do not change. Instead, focusing is achieved by changing the relative position of the focusing lens group 30. This gives the internal focusing optical lens 200 an internal focusing function, making the camera module particularly suitable as a front-facing camera module for portable electronic devices.

[0059] In particular, the object-side lens group 20 is small in size and is mounted on the housing 10 in a manner that protrudes from the housing 10, allowing the internal focusing optical lens 200 to adopt a "small head" design. Thus, when the camera module is used as a front-facing camera module for a portable electronic device, on the one hand, the object-side lens group 20 can be closer to the screen opening of the portable 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. On the other hand, it does not increase the screen opening size, thereby meeting the requirement of miniaturization of the opening.

[0060] The object-side lens group 20 includes an object-side lens barrel 21 and at least one object-side lens element 22 mounted on the object-side lens barrel 21, wherein the object-side lens barrel 21 is attached to the housing 10 to mount the object-side lens group 20 to the housing 10. The focusing lens group 30 includes a focusing lens barrel 31 and at least one focusing lens element 32 mounted on the focusing lens barrel 31. The image-side lens group 40 includes an image-side lens barrel 41 and at least one image-side lens element 42 mounted on the image-side lens barrel 41, wherein the image-side lens barrel 41 is fixedly mounted to the housing 10 to fix the image-side lens group 40 to the housing space 11 of the housing 10.

[0061] Specifically, in the appendix Figures 1 to 4B In this specific example of the camera module shown, the object-side lens group 20 includes an object-side lens barrel 21 and two object-side lens elements 22, the two object-side lens elements 22 being spaced apart along the height direction of the object-side lens barrel 21; the focusing lens group 30 includes a focusing lens barrel 31 and a focusing lens element 32; and the image-side lens group 40 includes an image-side lens barrel 41 and two image-side lens elements 42, the two image-side lens elements 42 being spaced apart along the height direction of the image-side lens barrel 41. In other words, in the attached... Figures 1 to 4B In this specific example of the camera module shown, the internal focusing optical lens 200 includes five lenses: two object-side lenses 22, one focusing lens 32, and two image-side lenses 42.

[0062] It should be noted that the optical properties of the two object-side lenses 22 of the object-side lens group 20 may be different, and correspondingly, the optical properties of the two image-side lenses 42 of the image-side lens group 40 may be different.

[0063] Continue to refer to the appendix Figures 1 to 4BThe housing 10 includes a shell body 14 and a surrounding body 15, wherein the surrounding body 15 extends integrally downward from the periphery of the shell body 14 to form the housing space 11 between the shell body 14 and the surrounding body 15, wherein the shell body 14 forms the top opening 12, and the surrounding body 15 defines the bottom opening 13, wherein the object-side lens barrel 21 of the object-side lens group 20 is attached to the shell body 14 of the housing 10.

[0064] Preferably, the outer diameter of the object-side lens group 20 is larger than the outer diameter of the focusing lens group 30. This facilitates the mounting of the object-side lens barrel 21 of the object-side lens group 20 onto the shell surface 14 of the shell 10, based on the fact that the focusing lens group 30 is drivably held in the shell space 11 of the shell 10, thereby making the structure of the camera module more reasonable.

[0065] Furthermore, the housing 10 includes at least one mounting arm 16, wherein the mounting arm 16 extends integrally downward from the inner wall of the housing body 14 so that the mounting arm 16 is located in the housing space 11, wherein the image-side lens barrel 41 of the image-side lens group 40 is mounted on the mounting arm 16 to fix the image-side lens group 40 in the housing space 11 of the housing 10.

[0066] It is worth mentioning that the mounting method of the image-side lens barrel 41 of the image-side lens group 40 and the mounting arm 16 of the housing 10 is not limited in the camera module of the present invention. For example, the image-side lens barrel 41 of the image-side lens group 40 can be mounted to the mounting arm 16 by means of, but not limited to, adhesive bonding.

[0067] Specifically, see the attached document. Figure 4A and Figure 4B The mounting arm 16 of the housing 10 has at least one slot 161, and the outer wall of the image-side lens barrel 41 of the image-side lens group 40 has at least one protrusion 411. The protrusion 411 of the image-side lens barrel 41 is engaged with the slot 161 of the mounting arm 16 to mount the image-side lens barrel 41 to the mounting arm 16, thereby fixing the image-side lens group 40 in the housing space 11 of the housing 10. Furthermore, by the mutual cooperation between the protrusion 411 of the image-side lens barrel 41 and the slot 161 of the mounting arm 16, rotation of the image-side lens group 40 relative to the housing 10 within the housing space 11 of the housing 10 can be prevented, thus ensuring the reliability of the internal focusing optical lens 200.

[0068] More specifically, the mounting arm 16 of the housing 10 is provided with a plurality of mutually spaced slots 161, and correspondingly, the outer wall of the image-side lens barrel 41 of the image-side lens group 40 is provided with a plurality of mutually spaced protrusions 411, wherein these protrusions 411 of the image-side lens barrel 41 and these slots 161 of the mounting arm 16 correspond one-to-one to ensure the reliability of the assembly relationship between the image-side lens group 40 and the housing 10.

[0069] Optionally, in other possible examples of the camera module of the present invention, the slot 161 may be formed on the image-side lens barrel 41, and the protrusion 411 may be formed on the mounting arm 16. The image-side lens group 40 can be reliably mounted on the housing 10 by the mutual cooperation between the protrusion 411 of the mounting arm 16 and the slot 161 of the image-side lens barrel 41.

[0070] Continue to refer to the appendix Figures 1 to 4B The internal focusing optical lens 200 further includes a driving unit 50 for suspending the focusing lens group 30 in the housing space 11 of the housing 10 and driving the focusing lens group 30 to move along the optical axis direction of the camera module within the housing space 11 of the housing 10 to achieve focusing of the camera module.

[0071] Specifically, the drive unit 50 includes a fixing part 51, a support part 52, at least one spring piece 53, and a drive part 54. The fixing part 51 is fixedly disposed on the housing 10. The support part 52 has a support outer side 5201 and a support inner side 5202 corresponding to the support outer side 5201. The support outer side 5201 of the support part 52 extends to a position adjacent to the fixing part 51, and the support inner side 5202 of the support part 52 extends to the upper side of the image-side lens group 40, so as to allow the focusing lens group 30 mounted on the support inner side 5202 of the support part 52 to be held on the upper side of the image-side lens group 40. The outer side of the spring piece 53 extends to and is connected to the fixing part 51, and the inner side of the spring piece 53 extends to and is connected to the bearing outer side 5201 of the bearing part 52, so that the spring piece 53 allows the focusing lens group 30 to be held in a suspended manner in the housing space 11 of the housing 10. The driving part 54 is located at the bearing outer side 5201 of the bearing part 52 to drive the bearing part 52 to move the focusing lens group 30 along the optical axis of the camera module, so as to achieve focusing of the camera module.

[0072] It should be noted that when the camera module is not in operation, the fixing part 51, the supporting part 52, and the spring piece 53 keep the focusing lens group 30 in a relatively stable state. When the driving part 54 drives the supporting part 52 to move the focusing lens group 30 upward along the optical axis of the camera module, the spring piece 53 simultaneously deforms upward. (Refer to the attached diagram.) Figure 3A Correspondingly, when the driving unit 54 drives the supporting unit 52 to move the focusing lens group 30 downward along the optical axis of the camera module, the spring piece 53 simultaneously deforms downward, as shown in the attached figure. Figure 3B .

[0073] It is worth mentioning that the number of spring pieces 53 in the internal focusing optical lens 200 of the present invention is limited, for example, in the attached Figures 1 to 4B In this specific example of the internal focusing optical lens 200 shown, the drive unit 50 includes a spring 53, the outer side of which extends to and is mounted on the top side of the fixing part 51, and the inner side of which extends to and is mounted on the top side of the bearing outer side 5201 of the bearing part 52; or the outer side of which extends to and is mounted on the bottom side of the fixing part 51, and the inner side of which extends to and is mounted on the bottom side of the bearing outer side 5201 of the bearing part 52. Optionally, in other examples of the internal focusing optical lens 200, the drive unit 50 includes two springs 53, one of which extends outward to and is mounted on the top side of the fixing part 51 and extends inward to and is mounted on the top side of the bearing outer side 5201 of the bearing part 52, and the other spring 53 extends outward to and is mounted on the bottom side of the fixing part 51 and extends inward to and is mounted on the bottom side of the bearing outer side 5201 of the bearing part 52.

[0074] Optionally, in other examples of the camera module of the present invention, the drive unit 50 uses at least one ball bearing instead of the spring 53 to hold the focusing lens group 30 in a suspended manner within the housing space 11 of the housing 10. Specifically, the ball bearing is held between the fixing part 51 and the supporting part 52. When the camera module is not in operation, the fixing part 51, the supporting part 52, and the ball bearing keep the focusing lens group 30 in a relatively stable state. When the drive unit 54 drives the supporting part 52 to move the focusing lens group 30 along the optical axis of the camera module, the ball bearing can roll, making the movement of the supporting part 52 smoother. Specifically, the fixing part 51 is provided with at least one first groove to accommodate a portion of the ball bearing, and correspondingly, the supporting part 52 is provided with at least one second groove to accommodate a portion of the ball bearing, thus reliably holding the ball bearing between the fixing part 51 and the supporting part 52 and avoiding direct contact between the supporting part 52 and the fixing part 51.

[0075] Continue to refer to the appendix Figures 1 to 4B The driving unit 54 further includes at least one magnet 541 and at least one coil 542, wherein the magnet 541 is fixedly disposed on the fixed part 51, and the coil 542 is fixedly disposed on the outer side 5201 of the bearing part 52, and the position of the magnet 541 corresponds to the position of the coil 542. Thus, when the coil 542 is powered, the magnetic field generated by the coil 542 interacts with the magnet 541 to drive the bearing part 52 to move relative to the fixed part 51, thereby enabling the bearing part 52 to drive the focusing lens group 30 to move along the optical axis of the camera module to achieve focusing of the camera module.

[0076] Preferably, the coil 542 of the driving unit 54 can be electrically connected to the circuit board 101 of the photosensitive assembly 100 to allow the circuit board 101 to supply power to the coil 542 of the driving unit 54.

[0077] Optionally, in other examples of the camera module of the present invention, the magnet 541 of the driving part 54 can be fixedly disposed on the outer side 5201 of the supporting part 52, and correspondingly, the coil 542 can be fixedly disposed on the fixing part 51. Thus, when the coil 542 is powered, the magnetic field generated by the coil 542 interacts with the magnet 541 to drive the supporting part 52 to move relative to the fixing part 51, thereby enabling the supporting part 52 to drive the focusing lens group 30 to move along the optical axis of the camera module to achieve focusing of the camera module.

[0078] Preferably, the fixing part 51 is annular and located outside the focusing lens group 30. The driving part 54 includes two magnets 541, which are symmetrically arranged on opposite sides of the fixing part 51, thus allowing the two magnets 541 to be symmetrically positioned outside the focusing lens group 30. The bearing outer side 5201 of the supporting part 52 is annular and located outside the focusing lens group 30. The driving part 54 includes a coil 542 wound around the bearing outer side 5201 of the supporting part 52, thus the coil 542 is annular and located outside the focusing lens group 20. With this structure, when the coil 542 is powered, the magnetic field generated by the annular coil 542 and the two symmetrically arranged magnets 541 interact to drive the focusing lens group 30 evenly along the optical axis of the camera module via the support portion 52, thus preventing the focusing lens group 30 from tilting when driven and ensuring the optical performance of the camera module. Preferably, the support portion 52 forms an annular winding groove 5203 on the outer support side 5201, wherein the coil 542 is wound around the winding groove 5203 of the support portion 52 to ensure that the coil 542 is fixedly disposed on the outer support side 5201 of the support portion 52. Furthermore, by allowing the coil 542 to be wound around the winding groove 5203 of the support portion 52, the coil 542 is prevented from protruding from the sidewall of the outer support side 5201 of the support portion 52, which helps to reduce the length and width dimensions of the inner focusing optical lens 200.

[0079] Optionally, in other examples of the internal focusing optical lens 200 of the present invention, the driving part 54 may include three or more of the magnets 541, for example, the driving part 54 may include four magnets 541, which are arranged on the fixing part 51 in a manner that is spaced apart from each other and surrounds the focusing lens group 30.

[0080] It is worth mentioning that the assembly method of the magnet 541 of the driving part 54 and the fixing part 51 is not limited in the internal focusing optical lens 200 of the present invention. For example, the magnet 541 can be glued to the inner wall of the fixing part 51 so that the magnet 541 is fixedly disposed in the fixing part 51, or the fixing part 51 has at least one mounting groove 511, and the magnet 541 is fixedly disposed in the fixing part 51 by being mounted in the mounting groove 511.

[0081] Preferably, refer to the appendix Figures 1 to 4BThe fixing part 51 surrounds the image-side lens group 40, so that the two magnets 541 are symmetrically arranged on opposite sides of the image-side lens group 40. Correspondingly, the height position of the outer support 5201 of the support part 52 is lower than the height position of the inner support 5202. In this way, while ensuring that the focusing lens group 30 is held on the upper side of the image-side lens group 40, the support part 52 allows the coil 542 wrapped around the outer support 5201 of the support part 52 to surround the image-side lens group 40 and correspond to the position of the magnet 541. In this way, the coil 542 of the driving unit 50 can be lowered, which helps to reduce the height of the camera module, thereby making the camera module suitable for portable electronic devices that pursue thinness and lightness.

[0082] Specifically, the carrier portion 52 further includes a driven ring 521, a carrier ring 522, and at least one extension arm 523 extending between the driven ring 521 and the carrier ring 522. The driven ring 521 forms the outer carrier side 5201 of the carrier portion 52 to allow the coil 542 to be wound around the driven ring 521. The carrier ring 522 forms the inner carrier side 5202 of the carrier portion 52 to allow the focusing lens group 30 to be fixedly mounted on the carrier ring 522. The housing 10 has at least one movable channel 17 communicating with opposite sides of the mounting arm 16. The extension arm 523 of the carrier portion 52 is movably held in the movable channel 17 of the housing 10, such that the driven ring 521 and the carrier ring 522 of the carrier portion 52 can be respectively held on opposite sides of the mounting arm 16 of the housing 10.

[0083] Preferably, refer to the appendix Figure 4A and Figure 4B The support portion 52 includes two extension arms 523 that connect the driven ring 521 and the support ring 522 symmetrically. Correspondingly, the housing 10 has two movable channels 17, wherein each extension arm 523 of the support portion 52 is movably held in each movable channel 17 of the housing 10. The width of the movable channel 17 of the housing 10 is slightly larger than the width of the extension arm 523 of the support portion 52, thus preventing the extension arm 523 of the support portion 52 from contacting the mounting arm 16 of the housing 10 during the focusing process of the camera module.

[0084] Preferably, the driven ring 521, the bearing ring 5223, and the two extension arms 523 of the bearing portion 52 can be an integral structure, such that one end of each of the two extension arms 523 extends to and is integrally connected to the driven ring 521, and the other end extends to and is integrally connected to the bearing ring 522.

[0085] Preferably, at least a portion of the extension arm 523 of the support portion 52 is inclined, such that the height of the outer support side 5201 of the support portion 52 is lower than the height of the inner support side 5202, causing the coil 542 of the drive portion 54 to sink. In other words, the height of the driven ring 521 of the support portion 52 is lower than the height of the support ring 522, such that the support portion 52 is configured to allow the driven ring 521 to surround the image-side lens group 40 and to keep the support ring 522 on the upper side of the image-side lens group 40.

[0086] Specifically, see the attached document. Figures 1 to 4B The extension arm 523 of the support portion 52 has a lower horizontal extension portion 5231, an upper horizontal extension portion 5232, and an inclined extension portion 5233. The lower horizontal extension portion 5231 extends inward integrally from the driven ring 521, and the upper horizontal extension portion 5232 extends outward integrally from the support ring 522. The opposite ends of the inclined extension portion 5233 extend to and are connected to the lower horizontal extension portion 5231 and the upper horizontal extension portion 5232, respectively. Thus, the height position of the driven ring 521 of the support portion 52 is lower than the height position of the support ring 522, causing the coil 542 of the drive portion 54 to sink, which helps to reduce the height of the camera module.

[0087] In an optional example of the internal focusing optical lens 200 of the present invention, the extension arm 523 of the support portion 52 is composed of the lower horizontal extension portion 5231 and the inclined extension portion 5233, wherein the lower horizontal extension portion 5231 extends integrally inward from the driven ring 521, and the opposite ends of the inclined extension portion 5233 extend to and are connected to the lower horizontal extension portion 5231 and the support ring 522, respectively.

[0088] In another optional example of the internal focusing optical lens 200 of the present invention, the extension arm 523 of the support portion 52 is composed of the upper horizontal extension portion 5232 and the inclined extension portion 5233, wherein the upper horizontal extension portion 5232 extends integrally outward from the support ring 522, and the opposite ends of the inclined extension portion 5233 extend to and are connected to the upper horizontal extension portion 5232 and the driven ring 521, respectively.

[0089] In another alternative example of the internal focusing optical lens 200 of the present invention, the extension arm 523 of the support portion 52 is inclined as a whole, that is, the opposite ends of the extension arm 523 extend to and are connected to the driven ring 521 and the support ring 522 respectively in such an inclined manner as the extension arm 523 is inclined as a whole.

[0090] Furthermore, the drive unit 50 includes a carrier 55, wherein the carrier 55 surrounds the focusing lens barrel 31 of the focusing lens group 30, and the carrier 55 is mounted on the support ring 522 of the support part 52, and the focusing lens group 30 is fixedly mounted on the support part 52 by the carrier 55.

[0091] Continue to refer to the appendix Figures 1 to 4B The housing 10 has at least one clearance space 18, which connects the housing space 11 and the top opening 12. The extension arm 523 of the support portion 52 corresponds to the clearance space 18 of the housing 10, allowing the housing 10 to avoid the extension arm 523 of the support portion 52, thus allowing the focusing lens group 30 to have a greater range of travel. Preferably, the housing 10 has two clearance spaces 18, which are symmetrically formed on opposite sides of the top opening 12, wherein each extension arm 523 of the support portion 52 corresponds to each clearance space 18 of the housing 10.

[0092] It should be noted that the width of the clearance space 18 of the housing 10 is slightly larger than the width of the extension arm 523 of the support portion 52. This prevents the extension arm 523 of the support portion 52 from touching the housing 10 when the focusing lens group 30 is driven to move along the optical axis of the camera module, thus ensuring the reliability of the camera module.

[0093] Furthermore, the internal focusing optical lens 200 includes a cover 60, wherein the cover 60 has a central perforation 61, wherein the cover 60 is attached to the shell surface 14 of the housing 10 such that the object-side lens group 20 is held in the central perforation 61 of the cover 60, and the cover 60 closes the clearance space 18 of the housing 10. In this way, dust and other contaminants can be prevented from entering the interior of the internal focusing optical lens 200 through the clearance space 18 of the housing 10 of the internal focusing optical lens 200, thus ensuring the reliability of the internal focusing optical lens 200. Specifically, the lower side of the cover 60 extends to and is attached to the shell surface 14 of the housing 10, and the inner side of the cover 60 extends to and is attached to the object-side lens barrel 21 of the object-side lens group 20, so as to allow the cover 60 to close the clearance space 18 of the housing 10 and allow the object-side lens group 20 to be held in the central perforation 61 of the cover 60.

[0094] Furthermore, the internal focusing optical lens 200 includes a base 70 having a light path 71. The base 70 is mounted to the surround 15 of the housing 10 such that the image-side lens group 40 corresponds to the light path 71 of the base 70. Thus, the housing 10, the object-side lens group 20, and the base 70 form the general appearance of the internal focusing optical lens 200. The base 70 of the internal focusing optical lens 200 is mounted to the lens mount 103 of the photosensitive assembly 100, thereby positioning the internal focusing optical lens 200 in the light-sensing path of the photosensitive assembly 100 to form the camera module.

[0095] Continue to refer to the appendix Figures 1 to 4B The object-side lens group 20 has a clearance groove 211 on the bottom side of the object-side lens barrel 21, and the focusing lens group 30 has a protrusion 311 on the top side of the focusing lens barrel 31. The protrusion 311 of the focusing lens barrel 31 corresponds to the clearance groove 211 of the object-side lens barrel 21. When the camera module is focusing, the protrusion 311 of the focusing lens barrel 31 can extend to the clearance groove 211 of the object-side lens barrel 21 to allow the object-side lens group 20 to avoid the focusing lens group 30. In this way, the focusing lens group 30 can have a larger travel range, which is beneficial to improving the imaging effect of the camera module.

[0096] Specifically, the bottom side of the object-side lens barrel 21 has an inner convex ring 212 and an outer convex ring 213, and a clearance groove 211 is formed between the inner convex ring 212 and the outer convex ring 213, and the clearance groove 211 is annular. The inner convex ring 212 of the object-side lens barrel 21 extends downward to prevent stray light, and the outer convex ring 213 of the object-side lens barrel 21 extends downward to be bonded to the shell surface 14 of the outer casing 10. During the process of bonding the outer convex ring 213 of the object-side lens barrel 21 to the shell surface 14 of the outer casing 10 with adhesive, the clearance groove 211 of the object-side lens barrel 21 is used to accommodate overflowing adhesive, thereby giving the clearance groove 211 of the object-side lens barrel 21 a function of collecting overflowing adhesive.

[0097] Appendix Figure 5 A modified example of the camera module of the present invention is shown, with reference to the appendix. Figures 1 to 4B The difference between the camera module shown and the one in question is that, in the attached... Figure 5 In this specific example of the camera module shown, the housing 10 and the fixing part 51 of the driving unit 50 are an integral structure. In other words, the magnet 541 of the driving part 54 of the driving unit 50 can be directly and fixedly disposed on the housing 10, thereby further reducing the length and width dimensions of the camera module and reducing the overall volume of the camera module. The outer side of the spring piece 53 is directly fixed to the housing 10.

[0098] Appendix Figure 6 Another variation of the camera module of the present invention is shown, with reference to the appendix. Figures 1 to 4B The 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 image-side lens group 40 is directly and fixedly mounted on the base 70, so that the base 70 and the housing 10 cooperate to ensure the relative positional relationship between the object-side lens group 20 and the image-side lens group 30.

[0099] According to another aspect of the present invention, the present invention further provides a method for assembling the internal focusing optical lens 200, wherein the assembly method includes the following steps:

[0100] (a) The object-side lens group 20, the focusing lens group 30 and the image-side lens group 30 are allowed to be arranged substantially coaxially;

[0101] (b) Calibrate the gap in the Z direction of the object-side lens group 20, the focusing lens group 30 and the image-side lens group 40;

[0102] (c) The XY positions of the object-side lens group 20, the focusing lens group 30, and the image-side lens group 40 are calibrated sequentially from low to high sensitivity within the overall internal focusing optical lens 200; and

[0103] (d) Assemble the calibrated image-side lens group 40, the focusing lens group 30 and the object-side lens group 20 to obtain the internal focusing optical lens 200.

[0104] Preferably, the relative positions of the object-side lens group 20 and the image-side lens group 40 are fixed relative to each other by the housing 10, and the focusing lens group 30 is suspended and held in the housing space 11 of the housing 10 by the driving unit 50.

[0105] Preferably, in the above method, firstly, using the image-side lens group 40 as a reference, the gap in the Z direction of the focusing lens group 30 is calibrated; secondly, using the image-side lens group 40 and the focusing lens group 30 as references, the gap in the Z direction of the image-side lens group 40 is corrected; thirdly, using the image-side lens group 40 as a reference, the position in the ZY direction of the focusing lens group 30 is corrected; and finally, using the image-side lens group 40 and the focusing lens group 30 as references, the position in the XY direction of the object-side lens group 20 is corrected.

[0106] It is worth mentioning that the relationship between the object-side lens group 20, the focusing lens group 30 and the image-side lens group 40 of the internal focusing optical lens 200 is as follows: (1) the gap in the Z direction mainly affects the field curvature of the internal focusing optical lens 200; (2) the position in the XY direction mainly affects the peak value of the internal focusing optical lens 200; (3) the tilt of the object-side lens group 20, the focusing lens group 30 and the image-side lens group 40 mainly affects the tilt and astigmatism of the internal focusing optical lens 200.

[0107] Therefore, when designing the internal focusing optical lens 200, it is necessary to consider the overall optical performance sensitivity of the internal focusing optical lens 200 in a balanced manner. This means avoiding situations where a specific lens or lens group becomes overly sensitive to the relationship between the object-side lens group 20, the focusing lens group 30, and the image-side lens group 40, leading to a decrease in the overall optical performance of the internal focusing optical lens 200 due to the high sensitivity of that lens or lens group. However, due to the different functions and optical powers of the lenses, there will inevitably be lens groups with increasing sensitivity. Generally, the sensitivity of these lens groups increases sequentially from the image side to the object side; that is, the sensitivity of the focusing lens group 30 is higher than that of the image-side lens group 40, and the sensitivity of the object-side lens group 20 is higher than that of the focusing lens group 30. Therefore, in the assembly method of the present invention, after calibrating the gap in the Z direction of the object-side lens group 20, the focusing lens group 30 and the image-side lens group 40, it is necessary to calibrate the positions in the XY directions of the object-side lens group 20, the focusing lens group 30 and the image-side lens group 40 in order of increasing sensitivity, so as to ensure the overall performance of the internal focusing optical lens 200.

[0108] Appendix Figures 7 to 11 A camera module according to a second preferred embodiment of the present invention is shown, along with an attached... Figures 1 to 4B Compared to the camera module shown, the attached Figures 7 to 11 One difference in the illustrated camera module is that the focusing lens group 30 consists solely of the focusing lens 32. In other words, in the attached... Figures 7 to 1 In this specific example of the camera module shown in Figure 0, the focusing lens 32 of the focusing lens group 30 is directly mounted to the support ring 522 of the support portion 52. Preferably, the edge of the focusing lens 32 is provided with at least one clamping portion 321 to facilitate clamping the focusing lens 32 by a clamp through the clamping portion 321 of the focusing lens 32 during the assembly of the focusing lens group 30.

[0109] With appendix Figures 1 to 4B Compared to the camera module shown, the attached Figures 7 to 11 Another difference in the camera module shown is the assembly process of the internal focusing optical lens 200. Specifically, see attached... Figures 7 to 11 The assembly process of the internal focusing optical lens 200 of the camera module shown includes the following stages:

[0110] A standard lens group 300 is pre-fixed to the support ring 522 of the support part 52;

[0111] The support portion 52 is movably disposed in the housing space 11 of the housing 10 such that the standard lens group 300 corresponds to the clearance space 18 of the housing 10. At this time, the bottom surface of the standard lens group 300 is higher than the surface of the shell body 14 of the housing 10, so as to allow the standard lens group 300 to be removed laterally.

[0112] The image-side lens group 40 is fixedly disposed in the housing space 11 of the housing 10 and the image-side lens group 40 is pre-fixed to the housing 10, and the object-side lens group 20, the standard lens group 300 and the image-side lens group 40 are substantially coaxial;

[0113] Calibrate the image-side lens group 40, the standard lens group 300, and the object-side lens group 20;

[0114] The standard lens group 300 is removed and the focusing lens group 30 is moved in through the clearance space 18 of the housing 10 to obtain the internal focusing optical lens 200.

[0115] During the assembly of the internal focusing optical lens 200, the overall threshold of the internal focusing optical lens 200 can be improved by introducing the standard lens group 300, thereby adjusting the internal focusing optical lens 200 under high threshold performance.

[0116] Preferably, during the assembly of the internal focusing optical lens 200, after the focusing lens group 30 replaces the standard lens group 300, the object-side lens group 20, the focusing lens group 30, and the image-side lens group 40 are recalibrated. This helps to ensure the optical performance of the internal focusing optical lens 200 and the imaging quality of the camera module.

[0117] Preferably, during the assembly of the internal focusing optical lens 200, the standard lens group 300 is removed by moving it along the direction perpendicular to the optical axis of the internal focusing optical lens 200 through the clearance space 18 of the housing 10. Correspondingly, the focusing lens group 30 is moved in by moving it along the direction perpendicular to the optical axis of the internal focusing optical lens 200 through the clearance space 18 of the housing 10.

[0118] 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. An internal focusing optical lens, characterized in that, include: A group of side-view cameras; A group of focusing lenses; A group of side-view cameras; A housing, wherein an object-side lens group is mounted on the outer side of the housing, wherein an image-side lens group is fixedly disposed inside the housing, wherein a focusing lens group is drivably disposed inside the housing, and the object-side lens group, the focusing lens group, and the image-side lens group are coaxial, wherein the housing includes at least one mounting arm extending downward from the inner wall of the housing, the image-side lens group being mounted on the mounting arm, wherein the housing has at least one movable channel communicating between opposite sides of the mounting arm; as well as A driving unit includes a fixing part, a supporting part, and a driving part. The fixing part is disposed inside the housing or is integrally formed with the housing. The supporting part has a supporting outer side and a supporting inner side corresponding to the supporting outer side. The supporting outer side extends outward to a position adjacent to the fixing part, and the supporting inner side extends inward to the upper side of the image-side lens group to hold the focusing lens group mounted on the supporting inner side of the supporting part above the image-side lens group. The driving part is located on the supporting outer side of the supporting part for driving... The drive unit moves the focusing lens group along the optical axis. The drive unit includes a driven ring, a support ring, and at least one extension arm extending between the driven ring and the support ring. The driven ring forms the outer support side of the drive unit, and the support ring forms the inner support side of the drive unit. The height of the outer support side of the drive unit is lower than the height of the inner support side, so that the drive unit is positioned around the image-side lens group. The extension arm is movably held in the moving channel, and the driven ring and the support ring are respectively held on opposite sides of the mounting arm.

2. The internal focusing optical lens according to claim 1, wherein the driving part includes at least one magnet and at least one coil, the magnet is fixedly disposed on the fixing part, the coil is fixedly disposed on the bearing outside the bearing part, and the position of the magnet corresponds to the position of the fixing part.

3. The internal focusing optical lens according to claim 2, wherein the driving part includes at least two magnets and a coil, at least one pair of magnets are arranged opposite each other, and the coil is wound around the outer side of the support of the support part.

4. The internal focusing optical lens according to claim 1, wherein at least a portion of the extension arm is inclined such that the height position of the outer side of the support is lower than the height position of the inner side of the support.

5. The internal focusing optical lens according to claim 4, wherein the extension arm of the carrier portion has a lower horizontal extension portion, an upper horizontal extension portion, and an inclined extension portion, the lower horizontal extension portion extending integrally inward from the driven ring, the upper horizontal extension portion extending integrally outward from the carrier ring, and the opposite ends of the inclined extension portion extending to and being connected to the lower horizontal extension portion and the upper horizontal extension portion, respectively; or, the extension arm of the carrier portion has a lower horizontal extension portion and an inclined extension portion, the lower horizontal extension portion extending integrally inward from the driven ring, and the opposite ends of the inclined extension portion extending to and being connected to the lower horizontal extension portion and the carrier ring, respectively; or, the extension arm of the carrier portion has an inclined extension portion and an upper horizontal extension portion, the upper horizontal extension portion extending integrally outward from the carrier ring, and the opposite ends of the inclined extension portion extending to and being connected to the driven ring and the upper horizontal extension portion, respectively; or, the extension arm of the carrier portion is inclined overall.

6. The internal focusing optical lens according to any one of claims 1 to 3, wherein the housing has at least one clearance space to allow clearance from the support portion.

7. The internal focusing optical lens according to claim 4, wherein the housing has at least one clearance space to allow the extension arm of the support portion to pass.

8. The internal focusing optical lens of claim 6, further comprising a cover, the bottom side of which extends to the housing and the inner side of which extends to the object-side lens group, to allow the cover to close the clearance space.

9. The internal focusing optical lens according to claim 6, wherein the outer diameter of the object-side lens group is larger than the outer diameter of the focusing lens group.

10. The internal focusing optical lens according to any one of claims 1 to 3, wherein the object-side lens barrel of the object-side lens group has a clearance groove to avoid the protrusion of the focusing lens barrel of the focusing lens group.

11. A camera module, characterized in that, include: One photosensitive component; and The internal focusing optical lens according to any one of claims 1 to 10, wherein the internal focusing optical lens is disposed in the light-sensing path of the photosensitive component.

Images