Lens Module and Electronic Device

Abstract

The present application provides a lens module. The lens module includes a filter switcher, and the filter switcher includes a bracket, two mounting frames, two first adhesive layers, and two filters. The bracket includes a first surface, a second surface, and two openings; one of the openings is provided with one of the mounting frames. The mounting frame includes a connecting portion connected to the inner sidewall of the opening and a platform portion extending from the connecting portion toward the central axis of the opening. The thickness of the platform portion is less than the thickness of the bracket; each filter is bonded to the surface of the platform portion through a first adhesive layer. The present application also provides an electronic device including the above lens module. The present application reduces the total thickness of the filter switcher, enables the filter switcher to be applicable to an ultra-wide-angle short focal length lens module, and improves the reliability of the lens module.

Description

Technical Field

[0001] The present invention relates to the field of electronic and optical devices, and particularly to a lens module and an electronic device. Background Art

[0002] Existing lens modules generally include components such as lenses, carriers, filter switches, and circuit boards, where the filter switch is located between the lens and the circuit board. With the continuous development of the security or surveillance field, currently lenses are increasingly developing towards a large wide-angle direction. The wider the angle of the lens, the shorter the focal length, and the closer the distance between the lens and the circuit board.

[0003] Traditional filter switches include filters and brackets, where the filters are directly adhered to the surface of the brackets through an adhesive layer. Traditional filter switches are relatively thick and it is difficult to apply them to the above-mentioned short focal length lens modules. Moreover, the filters are prone to falling off during the switching process, resulting in poor reliability. Summary of the Invention

[0004] In view of this, the present invention provides a short focal length lens module with a filter switch having a relatively thin thickness and high reliability.

[0005] In addition, it is also necessary to provide an electronic device having the lens module.

[0006] The present invention provides a lens module, which includes a base, a cover plate, and a filter switch. After the base and the cover plate are closed, they enclose an accommodation cavity, and the filter switch is accommodated in the accommodation cavity. The filter switch includes a bracket, two mounting frames, two first adhesive layers, and two filters. The bracket includes a first surface and a second surface arranged opposite to each other, and two openings penetrating through the first surface and the second surface; each mounting frame is located on the inner side wall of one of the openings. Each mounting frame includes a connecting portion connected to the inner side wall of the opening and a platform portion extending from the connecting portion towards the central axis of the opening. Along the direction of the central axis, the surface of the platform portion close to the first surface is lower than the first surface; each first adhesive layer is provided on the surface of one platform portion close to the first surface; each filter is provided on the surface of one first adhesive layer.

[0007] In some possible implementation manners, multiple protrusions extend towards the central axis direction on the inner side wall of the opening, and each protrusion extends into the mounting frame.

[0008] In some possible implementation manners, the mounting frame is integrally formed on the inner side wall of the opening by nano-injection molding.

[0009] In some possible embodiments, a plurality of through holes are provided in the platform portion, each of the through holes penetrating the platform portion along the direction of the central axis, and the first adhesive layer extends into each of the through holes.

[0010] In some possible embodiments, a gap is formed between the side wall of the filter and the connecting portion, and a second adhesive layer is provided in the gap.

[0011] In some possible embodiments, along the direction of the central axis, the thickness of the platform portion is 0.06 mm to 0.15 mm.

[0012] In some possible embodiments, the connecting portion extends to the first surface to form a coating layer, and the surface of the coating layer away from the first surface does not extend beyond the surface of the filter away from the first adhesive layer.

[0013] In some possible embodiments, the lens module further includes a base, the base includes a first bearing portion and a second bearing portion, the bracket is located on the first bearing portion, and a rotary moving component is provided in the second bearing portion, and the rotary moving component is movably connected to the bracket.

[0014] In some embodiments, the rotary moving component includes a rotating mechanism provided on the second bearing portion and a connecting arm provided on the rotating mechanism. A clamping block is provided at one end of the connecting arm away from the rotating mechanism, and a waist-shaped hole is provided at one end of the bracket close to the second bearing portion, and the clamping block extends into the waist-shaped hole.

[0015] The present application also provides an electronic device, and the electronic device includes the lens module as described above.

[0016] Compared with the prior art, the present application effectively reduces the total thickness of the filter switch by arranging an installation frame in the window of the bracket, wherein the thickness of the platform portion of the installation frame is relatively thin, and fixing the filter on the platform portion through the first adhesive layer, so that the filter switch is applicable to an ultra-wide-angle short-focus lens module; in addition, the bonding force between the installation frame and the bracket is strong, improving the installation stability of the filter, and further enhancing the reliability of the lens module. Description of the Drawings

[0017] Figure 1 is a sectional view of the lens module provided by an embodiment of the present application.

[0018] Figure 2 is Figure 1 the exploded view of the base, the cover plate and the filter switch in

[0019] Figure 3 is the exploded view of the filter switch provided by an embodiment of the present application.

[0020] Figure 4 It is an assembly diagram of a filter switch provided by an embodiment of the present application.

[0021] Figure 5 It is Figure 1 an enlarged view of part A in

[0022] Figure 6 a schematic structural diagram of a filter switch provided by another embodiment of the present application.

[0023] Figure 7 a schematic structural diagram of a filter switch provided by still another embodiment of the present application.

[0024] Figure 8 a schematic structural diagram of a filter switch provided by still another embodiment of the present application.

[0025] Figure 9 a schematic structural diagram of the connection between a filter switch and a rotary moving component provided by an embodiment of the present application.

[0026] Figure 10 a schematic structural diagram of an electronic device provided by an embodiment of the present application.

[0027] Description of main component symbols

[0028]

[0029]

[0030] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. When an element is considered to be "disposed on" another element, it can be directly disposed on the other element or there may be an intermediate element at the same time.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention.

[0034] To further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose, the following provides a detailed description of the present invention in conjunction with the accompanying drawings and preferred embodiments.

[0035] Please refer to Figures 1 to 5 , a preferred embodiment of the present invention provides a lens module 100. The lens module 100 includes a base 1, a cover plate 8, and a filter switch 10. After the base 1 and the cover plate 8 are covered, they enclose a receiving cavity 20, and the filter switch 10 is accommodated in the receiving cavity 20. The filter switch 10 includes a bracket 2, two mounting frames 3, two first adhesive layers 4, and two filters 5. The bracket 2 includes a first surface 21 and a second surface 22 that are oppositely arranged, and two openings 23 that penetrate through the first surface 21 and the second surface 22. Each mounting frame 3 is located on the inner sidewall of one of the openings 23. Each mounting frame 3 includes a connecting portion 31 connected to the inner sidewall of the opening 23, and a platform portion 32 extending from the connecting portion 31 toward the central axis a of the opening 23. Along the direction of the central axis a, the surface of the platform portion 32 close to the first surface 21 is lower than the first surface 21. Each first adhesive layer 4 is disposed on the surface of one of the platform portions 32 close to the first surface 21, and each filter 5 is disposed on the surface of one of the first adhesive layers 4. The two filters 5 are located in the same horizontal plane.

[0036] Please refer to Figure 6 , the mounting frame 3 further includes a light passing port 33, and the light passing port 33 is disposed substantially coaxially with the opening 23, and the filter 5 is exposed at the light passing port 33. The connecting portion 31 contacts the inner sidewall of the opening 23 and is directly formed on the inner sidewall of the opening 23. Along the direction of the central axis a, the thickness of the connecting portion 31 can be less than or equal to the thickness of the bracket 2, or slightly greater than the thickness of the bracket 2, so that the connecting portion 31 extends to at least one of the first surface 21 and the second surface 22 of the bracket 2 to form a coating layer 34, thereby improving the bonding force between the mounting frame 3 and the bracket 2. At this time, the thickness of the coating layer 34 is very thin and will not affect the total thickness of the overall filter switch 10. In this embodiment, the connecting portion 31 extends to the first surface 21 to form a coating layer 34. Since the surface of the filter 5 close to the first surface 21 may exceed the first surface 21, forming the coating layer 34 on the first surface 21 can improve the bonding force between the mounting frame 3 and the bracket 2 while having no effect on the total thickness of the filter switch 10.

[0037] In this embodiment, the mounting frame 3 and the bracket 2 are integrally formed structures. The material of the bracket 2 is metal, and the material of the mounting frame 3 is plastic. In this embodiment, the mounting frame 3 is formed on the inner side wall of the bracket 2 corresponding to the window 23 by nano-injection molding. The nano-injection molding technology helps the integration of metal and plastic, which is beneficial to improving the bonding force between the mounting frame 3 and the bracket 2 and enhancing the bearing capacity of the mounting frame 3. In addition, the first adhesive layer 4 is directly attached to the plastic mounting frame 3, and the bonding strength is higher than that directly attached to the metal bracket 2, further improving the stability of the filter 5.

[0038] Please refer to Figure 5 and Figure 6 , a gap 6 is formed between the side wall of the filter 5 and the connecting portion 31, and a second adhesive layer 7 is provided in the gap 6. By adding the second adhesive layer 7, the stability of the filter 5 can be improved, and the risk of the filter 5 falling off can be reduced. In addition, the second adhesive layer 7 abuts against the filter 5 from the side to prevent the filter 5 from moving and misaligning in the mounting frame 3, providing the reliability of the filter switch 10.

[0039] Please refer to Figure 7 , the inner side wall of the window 23 extends in the direction of the central axis a to form a plurality of protrusions 24, and each protrusion 24 extends into the mounting frame 3. By forming a plurality of protrusions 24 on the inner side wall of the window 23, a connecting rib structure can be formed inside the mounting frame 3, which can enhance the bonding strength between the mounting frame 3 and the bracket 2, reduce the risk of the mounting frame 3 falling off the bracket 2, and improve the reliability of the filter switch 10.

[0040] In this embodiment, the protrusion 24 extends into the connecting portion 31 and does not protrude from the surface of the connecting portion 31 facing the central axis a, so as to prevent the protrusion 24 from affecting the installation of the filter 5 and causing damage to the filter 5.

[0041] In this embodiment, along the direction of the central axis a, the thickness of the protrusion 24 is equal to the thickness of the bracket 2, and the protrusion 24 is directly formed when the window 23 is formed, which simplifies the process and reduces the forming difficulty.

[0042] Please refer to Figure 8, a plurality of through holes 35 are provided on the platform portion 32, each of the through holes 35 penetrates through the platform portion 32 along the direction of the central axis a, and the first adhesive layer 4 extends into each of the through holes 35. By forming a plurality of through holes 35 with small apertures on the platform portion 32, the first adhesive layer 4 can extend into the through holes 35 to form a gripper inside the platform portion 32, improving the bonding strength between the first adhesive layer 4 and the platform portion 32, thereby improving the bonding strength between the filter 5 and the platform portion 32, reducing the risk of the first adhesive layer 4 and the filter 5 falling off from the surface of the platform portion 32, and improving the reliability of the filter switch 10.

[0043] Please refer to Figure 9 , in combination with Figure 1 and Figure 2 , the base 1 is generally a hollow rectangular frame structure. The base 1 includes a first bearing portion 11 and a second bearing portion 12. The first bearing portion 11 includes a light passing port 13. The filter switch 10 is disposed on the first bearing portion 11. A rotation and movement assembly 14 is provided in the second bearing portion 12. The rotation and movement assembly 14 is movably connected to the filter switch 10. The rotation of the rotation and movement assembly 14 is used to drive the filter switch 10 to move along a first direction b, so that the two filters 5 can be successively exposed at the light passing port 13 to achieve the purpose of switching the filter 5. Wherein, the first direction b is perpendicular to the central axis a, and the first direction b is the arrangement direction of the two filters 5.

[0044] In this embodiment, the rotation and movement assembly 14 includes a rotation mechanism 141 disposed on the second bearing portion 12 and a connecting arm 142 disposed on the rotation mechanism 141. A clamping block 143 is provided at one end of the connecting arm 142 away from the rotation mechanism 141. A waist-shaped hole 25 is provided at one end of the bracket 2 close to the second bearing portion 12. The clamping block 143 extends into the waist-shaped hole 25. The rotation of the rotation mechanism 141 drives the connecting arm 142 to rotate, drives the bracket 2 and then drives the filter 5 to reciprocate along the first direction b to achieve the purpose of switching the filter 5.

[0045] Please refer to again Figure 1 , Figure 2 and Figure 5, the lens module 100 further includes a lens assembly 91 disposed on the side of the base 1 away from the cover plate 8 and a circuit board 92 disposed on the side of the cover plate 8 away from the base 1, and the filter switch 10 is located between the lens assembly 91 and the circuit board 92. Wherein the mounting frame 3, the base 1 and the cover plate 8 are respectively provided with light passing openings 33(13, 81) corresponding to the opening window 23, and the opening window 23, the light passing openings 33(13, 81) and the lens assembly 91 are coaxially arranged. The distance between the lens assembly 91 and the circuit board 92 of the lens module 100 determines the installation space of the filter switch 10. For lens modules with ultra-wide angles and short focal lengths, the installation space of the filter switch 10 is very narrow, and it is very difficult for traditional filter switches to adapt. Referring jointly to Figure 5 , the total thickness H of the filter switch 10 provided in the present application = the thickness h of the platform portion 32 + the thickness of the first adhesive layer 4 + the thickness of the filter 5. Among them, the thickness of the platform portion 32 is 0.06 mm to 0.15 mm, and the specific thickness can be 0.1 mm. The thickness of the filter 5 is about 0.21 mm, and the thickness of the first adhesive layer 4 is about 0.03 mm. Then, the total thickness H of the filter switch 10 is about 0.34 mm. Compared with traditional filter switches (mostly about 1 mm), the thickness of the filter switch 10 in the present application has been significantly reduced. The filter switch 10 in the present application is very thin and can adapt to the above-mentioned ultra-wide-angle short focal length lens module 100, and there is a large adjustable space for the focal length of the lens module 100.

[0046] Please refer to Figure 10 , the present application further provides an electronic device 200, and the electronic device 200 includes the lens module 100 as described above. The electronic device can be a monitoring device, a mobile phone, a wearable device or a camera, etc. In this embodiment, the electronic device 200 is a monitoring device with an ultra-wide angle.

[0047] In the present application, by providing a mounting frame 3 in the opening window 23 of the bracket 2, wherein the thickness of the platform portion 32 of the mounting frame 3 is relatively thin, and the filter 5 is fixed on the platform portion 32 through the first adhesive layer 4, the total thickness of the filter switch 10 can be effectively reduced, so that the filter switch 10 is applicable to the ultra-wide-angle short focal length lens module 100; in addition, the bonding force between the mounting frame 3 and the bracket 2 is strong, improving the mounting stability of the filter 5, and further enhancing the reliability of the lens module 100.

[0048] The above embodiments are only used to illustrate the present invention, but in the actual application process, it cannot be limited to this embodiment. For those of ordinary skill in the art, other deformations and changes made according to the technical concept of the present invention should fall within the protection scope of the claims of the present invention.

Claims

1. A lens module, comprising a base, a cover plate, and a filter switcher. After the base and the cover plate are closed, they enclose an accommodation cavity, and the filter switcher is accommodated in the accommodation cavity. It is characterized in that, The filter switcher includes: a bracket, including a first surface and a second surface arranged oppositely, and two openings penetrating through the first surface and the second surface; two mounting frames, each of the mounting frames being located on the inner sidewall of one of the openings. Each of the mounting frames includes a connecting portion connected to the inner sidewall of the opening, and a platform portion extending from the connecting portion towards the central axis of the opening. Along the direction of the central axis, the surface of the platform portion close to the first surface is lower than the first surface; two first adhesive layers, each of the first adhesive layers being disposed on the surface of one of the platform portions close to the first surface; and two filters, each of the filters being disposed on the surface of one of the first adhesive layers, a plurality of through holes are provided on the platform portion, each of the through holes penetrating through the platform portion along the direction of the central axis, and the first adhesive layer extends into each of the through holes.

2. The lens module according to claim 1, wherein The inner sidewall of the opening extends towards the central axis direction to form a plurality of protrusions, and each of the protrusions extends into the mounting frame.

3. The lens module according to claim 2, wherein The mounting frame is integrally formed on the inner sidewall of the opening by nano-injection molding.

4. The lens module according to claim 1, wherein A gap is formed between the sidewall of the filter and the connecting portion, and a second adhesive layer is provided in the gap.

5. The lens module according to claim 1, wherein Along the direction of the central axis, the thickness of the platform portion is 0.06 mm to 0.15 mm.

6. The lens module according to claim 1, wherein The connecting portion extends to the first surface to form a coating layer, and the surface of the coating layer away from the first surface does not exceed the surface of the filter away from the first adhesive layer.

7. The lens module according to claim 1, wherein The lens module further includes a base, the base includes a first bearing portion and a second bearing portion, the bracket is located on the first bearing portion, and a rotation and movement assembly is provided in the second bearing portion, and the rotation and movement assembly is movably connected to the bracket.

8. The lens module according to claim 7, wherein, The rotation and movement assembly includes a rotation mechanism provided on the second bearing portion and a connecting arm provided on the rotation mechanism. A clamping block is provided at one end of the connecting arm away from the rotation mechanism, and a waist-shaped hole is provided at one end of the bracket close to the second bearing portion, and the clamping block extends into the waist-shaped hole.

9. An electronic device, characterized in that, A lens module according to any one of claims 1 to 8.

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