Lens fixing mechanism and electronic equipment

Abstract

A lens fixing mechanism comprises a shielding cover, a fixing piece and a lens module, the shielding cover comprises a top plate and a side edge formed by bending and extending downwards from the periphery of the top plate, and the fixing piece comprises a fixing plate body fixed on the surface of the top plate and a lock catch elastic piece formed by bending and extending upwards from the fixing plate body. And the lens module is arranged in the fixing piece and is fixed and limited by the lock catch elastic piece. The invention further comprises the electronic equipment. The occupied space of a printed circuit board in the electronic equipment can be reduced.

Description

Technical Field

[0001] The present application relates to the field of electromagnetic shielding and lens modules, and in particular to a lens fixing mechanism and electronic equipment. Background Art

[0002] The shielding cover and the lens module are independent components in the electronic device. The shielding cover is used to shield key components mounted on the printed circuit board, such as processors and other chips. The shielding cover covers the components to be shielded, and the shielding cover is also mounted and fixed on the printed circuit board. The lens module is also mounted on the printed circuit board to obtain external image information and realize functions such as video and photo recording. The printed circuit board design of electronic equipment requires compactness, and the space occupied by components on the circuit board is extremely high. For example, the internal space of devices such as mobile phones is extremely small. The goal pursued by major manufacturers is to reduce the volume of electronic components to save space or reduce the space occupied by printed circuit boards.

[0003] In order to solve the above technical problems, the People's Republic of China's patent application 202122705928.8 discloses a technology to reduce the space occupied by the printed circuit board inside an electronic device, that is, placing the photosensitive chip on the outer surface of the shielding cover to reduce the space occupied by the photosensitive chip on the printed circuit board. However, the patent does not disclose how to fix the photosensitive chip. It is easy to think of using bonding to fix the photosensitive chip on the outer surface of the shielding cover, and the photosensitive chip is connected to the printed circuit board through a line bypassing the shielding cover. Summary of the invention

[0004] In view of this, it is necessary to provide a lens fixing mechanism and an electronic device that do not occupy the space of a printed circuit board.

[0005] In order to solve the above technical problems, the present application provides a lens fixing mechanism, including a shielding cover, a fixing part and a lens module, the shielding cover includes a top plate and a side edge formed by bending downward from the outer periphery of the top plate, the fixing part includes a fixing plate body fixed on the surface of the top plate and a locking spring piece formed by bending upward from the fixing plate body, the lens module is inserted into the fixing part and fixed and limited by the locking spring piece.

[0006] Preferably, a fixing area is defined on the top plate of the shielding cover, the fixing member is fixed in the fixing area, and the fixing plate body is fixed to the surface of the top plate by welding.

[0007] Preferably, a through hole is formed on the opposite side of the fixing plate body, and a through hole or a blind hole is opened at a corresponding position of the fixing area. The fixing plate body is then fixed to the through hole or the blind hole on the top plate by rivets or screws passing through the through hole.

[0008] Preferably, an excision space is formed by excising the middle part of the fixed plate body, the locking spring piece is formed by bending upwards and extending from one side of the fixed plate body adjacent to the excision space, and the lens module directly passes through the excision space and fits on the surface of the fixed area.

[0009] Preferably, the lens module includes a lens housing, a voice coil motor, a lens, a base, a filter disposed on the upper side of the base, a flexible printed circuit board disposed under the base, and an image sensor mounted on the upper surface of the flexible printed circuit board, which are sequentially assembled in the lens housing.

[0010] Preferably, the lens housing includes a cover surface and a side wall extending downward from the outer periphery of the cover surface. A lens hole through which the lens captures external light is formed in the cover surface. The side wall includes a first side wall extending horizontally and a second side wall extending vertically. A locking groove is formed by inward depression on the lower side of the second side wall. The locking spring piece includes a spring piece body and a locking convex portion formed by inward depression from the spring piece body. The locking convex portion is snapped into the locking groove of the second side wall for positioning.

[0011] Preferably, a wire groove is formed by excising the bottom side of the first side wall. The flexible printed circuit board includes a mounting portion disposed on the surface of the fixed area, a connector located outside the shielding cover, and a flexible wire electrically connecting the mounting portion to the connector. The flexible wire extends out of the fixed area from within the wire groove space.

[0012] Preferably, a light-transmitting hole is formed through the middle of the base. An upper groove is provided on the upper side of the base around the light-transmitting hole, and a lower groove is provided on the lower side of the base around the light-transmitting hole. The filter is fixed in the upper groove, and the image sensor is covered in the lower groove and corresponds to the filter.

[0013] Preferably, the fixed plate body extending horizontally is bent on one side adjacent to the excision space to form a resisting spring piece. The resisting spring piece includes a parallel extending portion extending towards the excision space from the fixed plate body, a resisting portion bent upwards from the parallel extending portion, and a guiding inclined surface bent outwards from the resisting portion. The lens housing includes a cover surface and a side wall extending downward from the outer periphery of the cover surface. A lens hole through which the lens captures external light is formed in the cover surface. The side wall includes a first side wall extending horizontally and a second side wall extending vertically. The resisting portion resists against the first side wall.

[0014] To solve the above technical problems, the present application also provides an electronic device, which includes the aforementioned lens fixing mechanism, a printed circuit board, and a chip mounted on the printed circuit board. The shielding cover is disposed outside the chip, and the lens module is connected to the printed circuit board through a flexible circuit board.

[0015] In the present application, the lens module is directly fixed on the surface of the shielding cover to reuse the space of the printed circuit board of the electronic device, and then signals are transmitted to the printed circuit board through a flexible circuit board, greatly reducing the occupied space of the printed circuit board. Description of the Drawings

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0017] Figure 1 is a three-dimensional combined view of the lens fixing mechanism of the present application for fixing the lens module;

[0018] Figure 2 is a three-dimensional exploded view of the lens fixing mechanism and the lens module of the present application;

[0019] Figure 3 is a three-dimensional exploded view of the lens fixing mechanism and the lens module of the present application;

[0020] Figure 4 is a three-dimensional exploded view of the lens fixing mechanism of the present application;

[0021] Figure 5 is a three-dimensional view of the fixing member of the lens fixing mechanism of the present application;

[0022] Figure 6 is along Figure 1 the cross-sectional view taken along the dashed line A-A shown.

[0023] Description of the Reference Numerals

[0024] Shielding cover - 10; Top plate - 11; Side - 12; Fixing area - 13; Shielding space - 14; Fixing member - 20; Fixing plate body - 21; Cutting space - 22; Supporting elastic piece - 23; Parallel extension part - 231; Supporting part - 232; Guiding inclined plane - 233; Locking elastic piece 24; Elastic piece main body - 241; Locking convex part - 242; Lens module - A; Lens housing - 30; Cover surface - 31; Side wall - 32; First side wall - 321; Second side wall - 322; Lock groove - 323; Lens hole - 33; Accommodating cavity - 34; Wiring groove - 35; Lens - 40; Voice coil motor - 50; Flexible printed circuit board - 60; Mounting part - 61; Flexible wire - 62; Connector - 63; Base - 70; Lower groove - 71; Upper groove - 72; Filter - 80; Image sensor - 90. Detailed implementation manner

[0025] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0026] Please refer to Figures 1 to 4 、 Figure 6 As shown, the lens fixing mechanism of the present application includes a shielding cover 10, a fixing member 20 fixed on the shielding cover 10, and a lens module A fixed on the fixing member 20.

[0027] The shielding cover 10 includes a top plate 11, a side 12 bent and extended downward from the outer periphery of the top plate 11, and a shielding space 14 with an open lower end surrounded by the top plate 11 and the side 12. The top plate 11 is a flat plate structure, and a set part of the flat top plate 11 is used to fix the fixing member 20, and this part of the area is defined as the fixing area 13. The edge of the side 12 is turned outward to form a horizontal soldering part 15 for soldering on a printed circuit board (not shown), and several chips (not shown) are provided on the printed circuit board, and some chips are covered in the shielding space 14 to achieve internal and external shielding.

[0028] Please continue to refer to Figure 5 As shown, the fixing member 20 includes a fixing plate body 21 attached to the surface of the fixing area 13, a cutting space 22 formed by cutting the middle part of the fixing plate body 21, a supporting elastic piece 23 bent and extended from the fixing plate body 21 at the rear end, and a locking elastic piece 24 bent and extended from the transverse two sides of the fixing plate body 21.

[0029] The fixed plate body 21 is attached to the surface of the fixed area 13 and fixed by spot welding. A perforation 25 is provided on the fixed plate body 21. A blind hole 16 or a through hole is provided at the position of the fixed area 13 of the top plate 11 corresponding to the perforation 25. The perforation 25 of the fixed plate body 21 and the blind hole or through hole of the top plate 11 are fixed together by rivets or screws. Preferably, one perforation 25 is provided at each diagonal corner.

[0030] The abutting elastic piece 23 includes a parallel extension part 231 extending from the fixed plate body 21 towards the cutting space 22, an abutting part 232 formed by bending upwards at the front end of the parallel extension part 231, and a guiding inclined surface 233 formed by bending backwards again from the abutting part 232. The left and right sides of the parallel extension part 231 are not connected, which can provide a certain elastic force for the abutting part 232 of the abutting elastic piece 23, that is, the parallel extension part 231 can tilt upwards to provide elastic force. The guiding inclined surface 233 can facilitate the insertion of the lens module into the fixing member 20 for fixation.

[0031] The locking elastic piece 24 includes an elastic piece main body 241 formed by bending upwards from the lateral two ends of the fixed plate body 21 on one side of the cutting space 22, and a locking convex part 242 stamped and protruding inwards from the elastic piece main body 241 into the cutting space 22. The cutting space 22 enables the lens module A to be directly received on the surface of the top plate 11 in the fixed area 13, which can reduce a certain thickness. At the same time, the fixing member 20 can maintain a certain thickness to enhance the rigidity strength without increasing the overall thickness of the product.

[0032] The lens module A includes a flexible circuit board 60, an image sensor 90 mounted on the flexible circuit board 60, a base 70 covering the image sensor 90, a filter 80 provided on the upper side of the base 70, a voice coil motor 50 installed above the base 70, a lens 40 provided in the voice coil motor 50, and a lens housing 30 that houses the above components and is fixed to the fixing member 20.

[0033] The lens 40 is responsible for receiving external images and realizing functions such as imaging and focusing; the voice coil motor 50 includes a permanent magnetic field, and controls the position of the elastic piece or the mover by changing the magnitude of the current in the coil in the motor, driving the lens to move, so as to realize the automatic focusing of the lens; the filter is mainly used to filter out ultraviolet light and infrared light that cannot be observed by the human eye, reflect the unwanted light, and plays a crucial role in the final imaging effect of the camera; the image sensor is used to convert optical signals into electrical signals; the flexible circuit board transmits electrical signals to the main circuit board of the electronic device and transmits control signals between the two.

[0034] A light-transmitting hole 73 is formed through the middle of the base 70. An upper groove 72 is formed on the upper side surface of the base 70 around the periphery of the light-transmitting hole 73 for placing the filter 80. A lower groove 71, which has an area larger than that of the upper groove 72, is formed by the downward depression of the lower side surface of the base 70, and the lower groove 71 is used to accommodate the image sensor 90. The flexible printed circuit board 60 includes a mounting portion 61 placed on the surface of the soldering area 13 of the top plate 11, a connector 63 extending out of the fixed area 13, and a flexible wire 62 electrically connecting the mounting portion 61 and the connector 63. The lens 40 is mounted upward from below in the voice coil motor 50 and is located above the base 70.

[0035] The lens housing 30 includes a cover surface 31, a side wall 32 extending downward from the outer periphery of the cover surface 31, a receiving cavity 34 surrounded by the cover surface 31 and the side wall 32, and a lens hole 33 passing through the cover surface 31 and communicating the receiving cavity 34 to the outside. The side wall 32 includes a first side wall 321 extending horizontally and a second side wall 322 extending vertically. At least a bottom portion of one of the first side walls 321 is cut off to form a wire groove 35 for the flexible wire 62 to pass through, and two locking grooves 323 are formed on the lower side of the second side wall 322, and the locking grooves 323 open downward.

[0036] During assembly, first, the lens 40 is installed into the voice coil motor 50, and the filter 80 is fixed into the upper groove 72 of the base 70; the voice coil motor 50 with the lens 40 installed is fixed above the base 70. The voice coil motor 50, the lens 40, and the base 70 are installed into the receiving cavity 34 of the lens housing 30. Then, the image sensor 90 is mounted on the mounting portion 61 of the flexible printed circuit board 60, and the mounting portion 61 with the image sensor 90 mounted is passed through the cut-out space 22 of the fixing member 20 and fixed to the surface of the fixed area 13 of the top plate 11. Finally, the lens housing 30 is pressed into the fixing member 20 from top to bottom, the locking convex portion 242 of the fixing member 20 is snapped into the locking groove 323 of the lens housing 30, and the abutting portion 232 of the abutting elastic piece 23 applies an elastic force to the first side wall 321 of the lens housing 30 to keep it stable. The flexible wire 62 passes through the wire groove 35 under the first side wall 321 of the lens housing 30 and is electrically connected to the main circuit board of the electronic device through the connector 63.

[0037] The bottom of the lens housing 30 passes through the cut-out space 22 of the fixing member 20 and is directly attached to the surface of the fixed area 13 to save the use of vertical space.

[0038] In this application, the lens module A is directly fixed on the surface of the shielding cover 10 to reuse the space of the printed circuit board of the electronic device, and then the signal is transmitted to the printed circuit board through the flexible circuit board 60, greatly reducing the occupied space of the printed circuit board.

[0039] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0040] The above embodiments only represent the preferred embodiments of the present invention, and the description thereof is relatively specific and detailed, but it should not be understood as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A lens fixing mechanism, characterized in that, It includes a shielding cover, a fixing member and a lens module. The shielding cover includes a top plate and side walls bent and extending downward from the outer periphery of the top plate. The fixing member includes a fixing plate body fixed on the surface of the top plate and a locking elastic piece bent and extending upward from the fixing plate body. The lens module is installed in the fixing member and fixed and limited by the locking elastic piece.

2. The lens fixing mechanism according to claim 1, wherein, A fixing area is defined on the top plate of the shielding cover. The fixing member is fixed within the fixing area, and the fixing plate body is fixedly welded to the surface of the top plate.

3. The lens fixing mechanism according to claim 2, wherein, Perforations are formed through the opposite sides of the fixing plate body. Through holes or blind holes are provided at corresponding positions in the fixing area. The fixing plate body is further fixed to the through holes or blind holes on the top plate by rivets or screws passing through the perforations.

4. The lens fixing mechanism according to claim 2, wherein, An excision space is formed by cutting off the middle part of the fixing plate body. The locking elastic piece is bent and extends upward from one side of the fixing plate body adjacent to the excision space. The lens module directly passes through the excision space and fits on the surface of the fixing area.

5. The lens fixing mechanism according to claim 4, characterized in that, The lens module includes a lens housing, a voice coil motor, a lens, a base, a filter placed on the upper side of the base, a flexible circuit board placed under the base, and an image sensor mounted on the upper surface of the flexible circuit board, which are assembled in the lens housing in sequence.

6. The lens fixing mechanism according to claim 5, wherein, The lens housing includes a cover surface and side walls extending downward from the outer periphery of the cover surface. A lens hole for the lens to capture external light is formed through the cover surface. The side walls include a first side wall extending horizontally and a second side wall extending longitudinally. A locking groove is formed by inward depression on the lower side of the second side wall. The locking elastic piece includes a main body of the elastic piece and a locking protrusion formed by inward depression from the main body of the elastic piece. The locking protrusion is snapped into the locking groove of the second side wall for limitation.

7. The lens fixing mechanism according to claim 6, wherein, A wire groove is formed by cutting off the bottom side of the first side wall. The flexible circuit board includes a mounting portion placed on the surface of the fixing area, a connector located outside the shielding cover, and a flexible wire electrically connecting the mounting portion to the connector. The flexible wire extends out of the fixing area from within the wire groove space.

8. The lens fixing mechanism according to claim 7, characterized in that, A light-transmitting hole is formed through the middle of the base. An upper groove is provided on the upper side of the base around the light-transmitting hole, and a lower groove is provided on the lower side of the base around the light-transmitting hole. The filter is fixed in the upper groove, and the image sensor is covered in the lower groove and corresponds to the filter.

9. The lens fixing mechanism according to claim 4, wherein The horizontally extending fixing plate body is bent to form a supporting elastic piece on one side adjacent to the excision space. The supporting elastic piece includes a parallel extension portion extending from the fixing plate body toward the excision space, a supporting portion bent upward from the parallel extension portion, and a guiding inclined surface bent outward from the supporting portion. The lens housing includes a cover surface and side walls extending downward from the outer periphery of the cover surface. A lens hole for the lens to capture external light is formed through the cover surface. The side walls include a first side wall extending horizontally and a second side wall extending longitudinally. The supporting portion abuts against the first side wall.

10. An electronic device, characterized in that, It includes a lens fixing mechanism as described in any one of claims 1-9, a printed circuit board, and a chip mounted on the printed circuit board. The shielding cover is disposed outside the chip, and the lens module is connected to the printed circuit board through a flexible printed circuit board.

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