Lens module and electronic devices

Abstract

This application provides a lens module, including a filter, a mounting bracket, and a circuit board. The mounting bracket has a first through hole. The filter is mounted in the first through hole. The circuit board has a first surface and a second surface corresponding to the first surface. The mounting bracket is disposed on the first surface, and a portion of the second surface is recessed to form an vent channel. An vent hole is provided through the bottom of the vent channel and the first surface, and the vent hole communicates with the vent channel. A first chamber is formed between the circuit board, the mounting bracket, and the filter, and the first chamber communicates with the vent hole. The vent channel includes a first air channel and a second air channel communicating with the first air channel. The extending directions of the first air channel and the second air channel form an angle. The vent hole is located at the bottom of the first air channel, and the second air channel extends to the end of the circuit board and forms an opening communicating with the outside. The vent hole and vent channel design in this application can prevent the filter from being damaged by air pressure differences. This application also provides an electronic device.

Description

Technical Field

[0001] This application relates to the technical field of electronic and optical devices, and more particularly to a lens module and electronic device. Background Technology

[0002] Most electronic devices on the market use lens modules that consist of a lens, lens mount, mounting bracket, filter, image sensor, and circuit board, assembled sequentially. The filter, mounting bracket, and circuit board are hermetically sealed to prevent external water and impurities from entering the lens module and affecting the lifespan of its internal components. However, electronic devices undergo vacuum reliability testing after manufacturing and before being released to the market. In a vacuum environment, the hermetically sealed seal between the filter and circuit board creates a pressure difference between the inside of the lens module and the external environment, increasing the stress on the filter and increasing the risk of it breaking. Summary of the Invention

[0003] In view of this, this application provides a lens module to solve the above problems.

[0004] In addition, it is necessary to provide an electronic device having the lens module.

[0005] This application provides a lens module, including a filter, a mounting bracket, and a circuit board. The mounting bracket has a first through hole; the filter is mounted in the first through hole; the circuit board has a first surface and a second surface corresponding to the first surface, the mounting bracket is disposed on the first surface, a portion of the second surface is recessed to form an escaping channel, an escaping hole is provided through the bottom of the escaping channel and the first surface, and the escaping hole communicates with the escaping channel.

[0006] A first chamber is formed between the circuit board, the mounting bracket, and the filter, and the first chamber is connected to the vent hole.

[0007] The escape duct includes a first air duct and a second air duct communicating with the first air duct. The extension directions of the first air duct and the second air duct form an angle. The escape hole is located at the bottom of the first air duct. The second air duct extends to the end of the circuit board and forms an opening communicating with the outside.

[0008] In some embodiments, the width of the second airway is smaller than the width of the first airway.

[0009] In some embodiments, the escape duct further includes a third duct connecting the first duct and the second duct, the inner wall of the third duct bulging outward in a direction away from the opening.

[0010] In some embodiments, the inner wall of the third airway is provided with multiple protrusions.

[0011] In some embodiments, the lens module further includes a first reinforcing plate disposed on the second surface.

[0012] In some embodiments, a first adhesive layer is further provided between the first reinforcing plate and the circuit board, and the first adhesive layer has a first notch at the position corresponding to the vent.

[0013] In some embodiments, the lens module further includes a photosensitive chip, and the circuit board also has a second through hole, with the photosensitive chip located in the second through hole and disposed on the first reinforcing plate.

[0014] In some embodiments, a second adhesive layer is further provided between the photosensitive chip and the first reinforcing plate.

[0015] In some embodiments, the lens module further includes a third adhesive layer disposed between the mounting bracket and the circuit board. The third adhesive layer includes a first adhesive segment and a second adhesive segment. The first adhesive segment is annularly disposed at the edge of the circuit board, and the vent hole is disposed near the edge of the first adhesive segment. The two ends of the second adhesive segment are connected to the inner side of the first adhesive segment. The second adhesive segment is disposed on the bottom surface of the mounting bracket near the edge of the first through hole, and the second adhesive segment has a second notch.

[0016] A second chamber is formed between the mounting bracket, the circuit board, the first adhesive segment, and the second adhesive segment. The vent hole communicates with the second chamber, and the first chamber and the second chamber are connected through the second notch.

[0017] This application also provides an electronic device including the lens module.

[0018] In this application, vent holes and vent channels are provided on the circuit board, allowing the first chamber to communicate with the outside atmosphere. When the lens module is placed in a vacuum environment, there is no pressure difference between the inside of the lens module and the external vacuum environment, reducing the risk of filter breakage. At the same time, there is a certain angle between the first and second vent channels, so that the gas flow directions of the first and second vent channels do not coincide, which can effectively prevent external dust from entering the interior of the lens module through the vent channels. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a lens module provided in an embodiment of this application.

[0020] Figure 2 yes Figure 1An exploded view of the lens module in one embodiment is shown.

[0021] Figure 3 yes Figure 1 A schematic diagram of the circuit board structure in one embodiment is shown.

[0022] Figure 4 yes Figure 1 The image shows a cross-sectional view of the lens module along IV-IV in one embodiment.

[0023] Figure 5 This is a schematic diagram of the escape duct in another embodiment.

[0024] Figure 6 This is a schematic diagram of the structure of an electronic device that uses a lens module.

[0025] Explanation of main component symbols

[0026] Lens Module 100

[0027] Circuit Board 10

[0028] First section 11

[0029] Second section 12

[0030] Third section 13

[0031] First surface 14

[0032] Second surface 15

[0033] 16 air vents

[0034] Second through hole 17

[0035] Escape duct 18

[0036] First airway 181

[0037] Second airway 182

[0038] Opening 1821

[0039] Third airway 183, 184

[0040] Inner wall 1831, 1842

[0041] Protrusion 1841

[0042] First reinforcement plate 21

[0043] Second reinforcement plate 22

[0044] First adhesive layer 31

[0045] First gap 311

[0046] Second adhesive layer 32

[0047] Third adhesive layer 33

[0048] First segment 331

[0049] Second segment 332

[0050] Second gap 333

[0051] Fourth adhesive layer 34

[0052] Fifth adhesive layer 35

[0053] Sixth adhesive layer 36

[0054] Image sensor 40

[0055] Mounting bracket 50

[0056] First through hole 51

[0057] Flange 52

[0058] 53 clearance slot

[0059] Filter 60

[0060] First chamber 71

[0061] Second chamber 72

[0062] Lens assembly 80

[0063] Mirror base 81

[0064] Third through hole 811

[0065] Internal thread 812

[0066] Lens 82

[0067] External thread 821

[0068] Electrical connection part 90

[0069] Electronic devices 200

[0070] The following detailed implementation methods will be combined with the above appendix. Figure 1-6 Further explanation of this application. Detailed Implementation

[0071] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0072] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component.

[0073] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0074] To further illustrate the technical means and effects adopted by this application in achieving its intended purpose, the following detailed description of this application is provided in conjunction with the accompanying drawings and embodiments.

[0075] Please see Figure 1 , Figure 2 and Figure 3 This application provides a lens module 100, including a first reinforcing plate 21, a circuit board 10, a photosensitive chip 40, a mounting bracket 50, a filter 60, and a lens assembly 80. The circuit board 10 has a first surface 14 and a second surface 15 corresponding to the first surface 14. The first reinforcing plate 21 is disposed on the second surface 15 of the circuit board 10. The mounting bracket 50 is disposed on the first surface 14 of the circuit board 10. The mounting bracket 50 is generally square and has a first through hole 51. The inner wall of the first through hole 51 extends inward to form a flange 52, and the filter 60 is disposed on the flange 52. The lens assembly 80 is disposed on the mounting bracket 50.

[0076] Please see Figure 2 and Figure 3 The circuit board 10 includes a first board portion 11, a second board portion 12, and a third board portion 13. A mounting bracket 50 is mounted on the first board portion 11, which is disposed on a first reinforcing plate 21. The second board portion 12 connects the first board portion 11 and the third board portion 13. The circuit board 10 can be a flexible board, a rigid board, or a rigid-flex board. In this embodiment, the circuit board 10 uses a rigid-flex board, meaning the first board portion 11 and the third board portion 13 are both rigid boards, while the second board portion 12 is a flexible board. The third board portion 13 has an electrical connection portion 90, which is mounted on the second surface 15. The electrical connection portion 90 can be a connector or a gold finger, used to connect the lens module 100 to the electronic device 200 (see reference 200). Figure 6 Signal transmission between other electronic components within the device.

[0077] Please see Figure 2 , Figure 3 and Figure 4 A second through hole 17 is provided on the first plate portion 11, and the photosensitive chip 40 is located in the second through hole 17 and disposed on the first reinforcing plate 21. A sealed first chamber 71 is formed between the first plate portion 11, the first reinforcing plate 21, the mounting bracket 50 and the filter 60.

[0078] Please see Figure 2 , Figure 3 and Figure 4 The first plate portion 11 also has an escape hole 16 that passes through the first plate portion 11 and communicates with the first chamber 71. A portion of the second surface 15 of the first plate portion 11 is recessed to form an escape channel 18, which communicates with the escape hole 16. The escape channel 18 includes a first air channel 181, a second air channel 182, and a third air channel 183. The third air channel 183 connects the first air channel 181 and the second air channel 182. The escape hole 16 is located at the bottom of the first air channel 181 and passes through the first surface 14. The escape hole 16 may be located at the end of the first air channel 181. The second air channel 182 extends to the end of the first plate portion 11 to form an opening 1821, which communicates with the outside atmosphere. This configuration, through the vent 16 and vent 18, allows the first chamber 71 to communicate with the outside atmosphere. Even if the lens module 100 is placed in a vacuum environment, the first chamber 71 will not experience a pressure difference with the vacuum environment, thus preventing damage to the filter 60 due to pressure differences and protecting the lens module 100. The gas flow directions in the first vent 181 and the second vent 182 do not coincide; that is, an angle is formed between the extending directions of the first vent 181 and the second vent 182. This configuration effectively prevents external impurities from entering the first chamber 71 through the vent 18 and affecting the imaging effect of the lens module 100.

[0079] See Figure 2 and Figure 3 In some embodiments, the width W2 of the second airway 182 is smaller than the width W1 of the first airway 181, thereby reducing the size of the channel connecting the second airway 182 to the outside world and further preventing external impurities from entering the escape airway 18.

[0080] See Figure 2 and Figure 3 In some embodiments, the third air passage 183 has an inner sidewall 1831 that is away from the opening 1821. In order to further prevent external impurities from entering the first chamber 71, the inner sidewall 1831 protrudes outward in a direction away from the opening 1821, thereby increasing the volume of the third air passage 183, so that some impurities can be accommodated in the third air passage 183, that is, it can block impurities entering the second air passage 182 from entering the first air passage 181 through the third air passage 183 to a certain extent.

[0081] See Figure 5In other embodiments, the inner wall 1842 of the third air passage 184 is wavy, so that some impurities entering the second air passage 182 are blocked by the wavy protrusions 1841 provided on the inner wall 1842 of the third air passage 184, thereby preventing them from entering the first air passage 181. It is understood that the third air passage 184 can also be configured with other shapes, as long as it serves to extend the distance between the first air passage 181 and the second air passage 182, or to increase the obstacle for impurities to enter the first air passage 181 through the second air passage 182.

[0082] See Figure 2 and Figure 4 In some embodiments, a first adhesive layer 31 is further provided between the first reinforcing plate 21 and the first plate portion 11. The first adhesive layer 31 has a first notch 311 at the position corresponding to the vent 18, thereby preventing the first adhesive layer 31 from blocking the vent 18. The first reinforcing plate 21 can be made of metal steel.

[0083] See Figure 2 and Figure 4 In some embodiments, a second adhesive layer 32 is provided between the photosensitive chip 40 and the first reinforcing plate 21 to achieve the connection between the photosensitive chip 40 and the first reinforcing plate 21.

[0084] See Figure 2 and Figure 4 In some embodiments, a third adhesive layer 33 is provided between the mounting bracket 50 and the first plate portion 11, thereby bonding the mounting bracket 50 and the first plate portion 11. The third adhesive layer 33 includes a first adhesive segment 331 and a second adhesive segment 332. The first adhesive segment 331 is generally square and is connected to the outer edge of the bottom surface of the mounting bracket 50. The vent hole 16 is located near the inner edge of the first adhesive segment 331. The two ends of the second adhesive segment 332 are connected to the inner side of the first adhesive segment 331 and are located near the edge of the second through hole 17. The second adhesive segment 332 has a second notch 333. A second chamber 72 is formed between the mounting bracket 50, the first adhesive segment 331, the second adhesive segment 332, and the first plate portion 11. The vent hole 16 communicates with the second chamber 72, and the first chamber 71 and the second chamber 72 are connected through the second notch 333. This configuration allows the first chamber 71 to be connected to the outside atmosphere through the second notch 333, the second chamber 72, the vent 16, and the vent 18. It also further prevents external impurities from entering the first chamber 71 through the second notch 333.

[0085] See Figure 2 In some embodiments, a second reinforcing plate 22 is also provided on the first surface 14 of the third plate portion 13, and the second reinforcing plate 22 is bonded to the third plate portion 13 by a fourth adhesive layer 34.

[0086] See Figure 2In some embodiments, a fifth adhesive layer 35 is provided between the flange 52 and the filter 60, and the filter 60 and the flange 52 are connected by the fifth adhesive layer 35.

[0087] See Figure 2 and Figure 4 The lens assembly 80 includes a lens 82 and a lens mount 81. The lens mount 81 is generally square and has a third through hole 811 with an external thread 821 on its inner wall. The third through hole 811 is collinear with the central axis of the first through hole 51. The outer wall of the lens 82 has an internal thread 812 that matches the external thread 821. The internal thread 812 and the external thread 821 are connected to achieve the connection between the lens 82 and the lens mount 81.

[0088] See Figure 2 and Figure 4 A sixth adhesive layer 36 is provided between the mounting bracket 50 and the lens mount 81 to connect the mounting bracket 50 and the lens assembly 80. A pair of clearance grooves 53 are also provided on the top surface of the mounting bracket 50. The two clearance grooves 53 are positioned opposite each other, close to the inner wall of the first through hole 51, and correspond to the circular shape of the bottom of the lens 82. When the lens assembly 80 is mounted on the mounting bracket 50, the clearance grooves 53 effectively prevent the bottom of the lens 82 from abutting against the top surface of the mounting bracket 50, thus avoiding interference with the installation of the lens assembly 80 and the mounting bracket 50.

[0089] See Figure 6 The lens module 100 can be applied to various electronic devices 200 with camera modules, such as mobile phones, wearable devices, vehicles, cameras, or monitoring devices. In this embodiment, the lens module 100 is applied to a mobile phone.

[0090] In this application, the first chamber 71 is connected to the outside atmosphere through the vent hole 16 and vent channel 18 provided on the circuit board 10. When the lens module 100 is placed in a vacuum environment, there is no pressure difference between the inside of the lens module 100 and the outside vacuum environment, which reduces the risk of the filter 60 breaking. At the same time, there is a certain angle between the first vent channel 181 and the second vent channel 182, so that the gas flow directions of the first vent channel 181 and the second vent channel 182 do not coincide, which can effectively prevent external dust from entering the interior of the lens module 100 through the vent channel 18.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A lens module, characterized in that, include: The mounting bracket has a first through hole; A filter is installed in the first through hole; The circuit board has a first surface and a second surface corresponding to the first surface. The mounting bracket is disposed on the first surface. A portion of the second surface is recessed to form an escaping channel. An escaping hole is provided through the bottom of the escaping channel and the first surface. The escaping hole communicates with the escaping channel. A first chamber is formed between the circuit board, the mounting bracket, and the filter, and the first chamber is connected to the vent hole. The escape duct includes a first airway, a second airway communicating with the first airway, and a third airway connecting the first airway and the second airway. The extension directions of the first airway and the second airway form an angle. The escape hole is located at the bottom of the first airway. The second airway extends to the end of the circuit board and forms an opening communicating with the outside. The width of the second airway is smaller than the width of the first airway. The inner wall of the third airway protrudes outward in a direction away from the opening.

2. The lens module as described in claim 1, characterized in that, The inner wall of the third airway has multiple protrusions.

3. The lens module as described in claim 1, characterized in that, The lens module also includes a first reinforcing plate, which is disposed on the second surface.

4. The lens module as described in claim 3, characterized in that, A first adhesive layer is provided between the first reinforcing plate and the circuit board, and the first adhesive layer has a first notch at the position corresponding to the air escape channel.

5. The lens module as described in claim 3, characterized in that, The lens module also includes a photosensitive chip, and a second through hole is provided on the circuit board. The photosensitive chip is located in the second through hole and disposed on the first reinforcing plate.

6. The lens module as described in claim 5, characterized in that, A second adhesive layer is also provided between the photosensitive chip and the first reinforcing plate.

7. The lens module as described in claim 1, characterized in that, The lens module further includes a third adhesive layer, which is disposed between the mounting bracket and the circuit board. The third adhesive layer includes a first adhesive segment and a second adhesive segment. The first adhesive segment is annularly disposed at the edge of the circuit board, and the vent hole is disposed near the edge of the first adhesive segment. The two ends of the second adhesive segment are connected to the inner side of the first adhesive segment. The second adhesive segment is disposed on the bottom surface of the mounting bracket near the edge of the first through hole, and the second adhesive segment has a second notch. A second chamber is formed between the mounting bracket, the circuit board, the first adhesive segment, and the second adhesive segment. The vent hole communicates with the second chamber, and the first chamber and the second chamber are connected through the second notch.

8. An electronic device, characterized in that, Includes the lens module as described in any one of claims 1-7.

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