Miniaturized camera module with heating function

Abstract

The utility model discloses a miniaturized camera module with a heating function. The miniaturized camera module comprises a lens, a wire harness, an upper shell and an imaging circuit board, the lens is arranged on the first side of the upper shell, the first end of the wire harness is connected to a heating assembly of the lens, and the middle section of the wire harness is led out from a cavity of the upper shell through a detachable preassembling structure; the second end of the wire harness extends out of the second side of the upper shell and is used for being electrically connected with an imaging circuit board. The surface, opposite to the lens, of the imaging circuit board is a first surface, the first surface is provided with a first glue joint structure, and the second side of the upper shell is provided with a second glue joint structure used for being matched with the first glue joint structure. According to the miniaturized camera module with the heating function provided by the utility model, the wiring harness on the lens is firstly connected with the imaging circuit board and then is assembled and AA, so that the length of the wiring harness does not influence the AA process and the assembly difficulty, and the existing production line machine table is reused to the greatest extent to ensure that the production efficiency is not reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive camera technology, and in particular to a miniaturized camera module with heating function. Background Technology

[0002] As cars become increasingly intelligent, car cameras are gradually becoming a standard automotive electronic product, improving road safety and driving comfort.

[0003] As automotive cameras are increasingly used in more advanced and efficient intelligent driving solutions, the safety and reliability of automotive electronic products with such important functions have also received widespread attention.

[0004] External cameras are more susceptible to environmental influences than internal cameras, especially in rainy or snowy weather, which significantly affects the actual imaging performance of the camera module and limits the vehicle's intelligent driving functions. To address this issue, the camera module needs to support a heating and decontamination function to ensure imaging stability in rainy or snowy conditions. Utility Model Content

[0005] In view of this, the present invention provides a miniaturized camera module with heating function. The camera module can use a lens with FPC flexible cable to connect to the internal PCBA connector of the module to realize power supply and temperature feedback. By designing the external structure of the camera module and optimizing the assembly sequence, production feasibility and product stability are ensured.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A miniaturized camera module with heating function includes: a lens, a wiring harness, an upper housing, and an imaging circuit board;

[0008] The lens is disposed on the first side of the upper housing, the first end of the wiring harness is connected to the heating assembly of the lens, the middle section of the wiring harness is led out through the cavity of the upper housing via a detachable pre-installed structure, and the second end of the wiring harness extends out from the second side of the upper housing for electrical connection to the imaging circuit board.

[0009] The imaging circuit board has a first surface facing the lens, and the first surface is provided with a first adhesive structure. The second side of the upper housing is provided with a second adhesive structure for cooperating with the first adhesive structure.

[0010] Optionally, a photosensitive element is provided on the first side of the imaging circuit board, and the first adhesive structure is arranged around the photosensitive element.

[0011] Optionally, the first adhesive structure and / or the second adhesive structure are adhesive bosses.

[0012] Optionally, it further includes: a wire harness connector; the side of the imaging circuit board opposite to the lens is a second side, and the wire harness connector is disposed on the second side;

[0013] The second end of the wire harness is used for electrical connection to the wire harness connector.

[0014] Optionally, the edge of the imaging circuit board is provided with a wire pass-through groove, and the second end of the wire harness passes through the wire pass-through groove to electrically connect to the wire harness connector.

[0015] Optionally, the detachable pre-assembled structure is a high-temperature tape.

[0016] Optionally, a limiting boss is provided on the second side of the upper housing.

[0017] The imaging circuit board is provided with a limiting hole that mates with the limiting boss.

[0018] Optionally, the lens housing and the upper housing are an integral structure.

[0019] Optionally, the heating component is a heating pad, which includes a heating resistance sheet and an NTC thermistor.

[0020] Optionally, it also includes: a sealing ring, a power supply circuit board, and a lower housing;

[0021] The power supply circuit board is fixed inside the lower housing, and the sealing ring is installed between the upper housing and the lower housing.

[0022] As can be seen from the above technical solution, the miniaturized camera module with heating function provided by this utility model first connects the wire harness on the lens to the imaging circuit board before assembly and AA. The length of the wire harness will not affect the AA process and assembly difficulty, and the existing production line equipment can be reused to the greatest extent to ensure that production efficiency is not reduced. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 An exploded structural diagram of a miniaturized camera module with heating function provided for an embodiment of the present utility model, including the main components that make up this type of camera module;

[0025] Figure 2An exploded view of a lens with an FPC flexible flat cable provided for an embodiment of this utility model;

[0026] Figure 3 Detailed structural diagram of the upper shell provided for an embodiment of this utility model;

[0027] Figure 4a First view of the structural design of the imaging circuit board provided in the embodiment of this utility model;

[0028] Figure 4b A second view of the structural design of the imaging circuit board provided in an embodiment of this utility model;

[0029] Figure 4c Axonometric drawing of the structural design of the imaging circuit board provided in this embodiment of the utility model;

[0030] Figure 5 An isometric view of the integrated structure of the lens with FPC flexible flat cable and the upper housing provided in an embodiment of this utility model;

[0031] Figure 6a A side view of the integrated structure of the lens with FPC flexible flat cable and the upper housing provided for an embodiment of this utility model;

[0032] Figure 6b For along Figure 6a Sectional view of section AA;

[0033] Figure 7 A product assembly flowchart for a miniaturized camera module with heating function provided in this embodiment of the utility model;

[0034] Figure 8 These are the structural design embodiments proposed by this utility model for different production volumes, wherein (1) is a mass production structural scheme and (2) is a small batch production structural scheme.

[0035] Among them, 1 is the lens, 2 is the sealing ring, 3 is the imaging circuit board, 4 is the wire harness connector, 5 is the power supply circuit board, 6 is the RF coaxial board end connector, 7 is the lower housing, 8 is the RF connector, 9 is the first adhesive bonding structure, and 10 is the board-to-board connector.

[0036] 101 is the lens, 102 is the heating pad, 103 is the pressure cap, 104 is the lens barrel, 105 is the wire harness, 106 is the upper housing, 107 is the limiting boss, 108 is the second adhesive structure, and 109 is the screw fixing hole.

[0037] 301 is a photosensitive element, and 302 is a printed circuit board. Detailed Implementation

[0038] This utility model discloses a miniaturized camera module with heating function. The camera module can use a lens with FPC flexible cable to connect to the internal PCBA connector of the module to realize power supply and temperature feedback. By designing the external structure of the camera module and optimizing the assembly sequence, production feasibility and product stability are guaranteed.

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] The miniaturized camera module with heating function provided in this embodiment includes: a lens 1, a wiring harness 105, an upper housing 106, and an imaging circuit board 3, the structure of which can be referred to Figure 1 and Figure 2 As shown; lens 1 is located on the first side of the upper housing 106 ( Figure 1 (on the left side), the first end of the wire harness 105 is connected to the heating assembly of the lens 1 (such as...). Figure 2 As shown in the heating pad 102, which includes a heating resistor and an NTC thermistor, the middle section of the wiring harness 105 is led out through the cavity of the upper housing 106 via a detachable pre-installed structure; the second end of the wiring harness 105 extends out from the second side of the upper housing 106. Figure 1 The right side of the upper housing 106 is used for electrical connection of the imaging circuit board 3; the surface of the imaging circuit board 3 opposite to the lens 1 is the first surface, which is provided with a first adhesive structure 9. The second side of the upper housing 106 is provided with a second adhesive structure 108 for cooperating with the first adhesive structure 9, the structure of which can be referred to Figure 3 As shown.

[0041] As can be seen from the above technical solution, the miniaturized camera module with heating function provided by this utility model embodiment places the AA dispensing area (i.e., the first adhesive bonding structure 9) on the first surface opposite to the lens 1 of the imaging circuit board 3, and the AA process is the same as that of common A lenses, without the need to modify the AA machine; the power supply circuit board 5 can be pre-fixed in the lower housing 7, and assembled after the lens 1 and the imaging circuit board 3 have completed AA and high-temperature curing. The camera module produced by this solution using this structure design can realize power supply and temperature reading for heating the lens 1 through the wiring harness 105. The wiring harness connection has high stability and long service life, and the entire assembly process is simple and does not affect the AA process.

[0042] In one embodiment provided in this solution, a photosensitive element 301 is provided on the first side of the imaging circuit board 3, the structure of which can be referred to Figure 4aAs shown, the main body of the imaging circuit board 3 is a printed circuit board 302, and the photosensitive element 301 is disposed on the first side (i.e., the front side) of the printed circuit board 302; on the first side of the printed circuit board 302, a first adhesive structure 9 is disposed around the photosensitive element 301, and its structure can be referred to Figure 1 As shown. This solution uses the imaging circuit board 3 with the photosensitive element 301 soldered on as the carrier surface of the AA glue, and the lens 1 with the wire harness 105 and the upper housing 106 are connected by AA.

[0043] In one embodiment provided in this solution, the first adhesive structure 9 and / or the second adhesive structure 108 are adhesive bosses, the structure of which can be referred to Figure 1 and Figure 3 As shown. On the one hand, the use of a boss-type adhesive bonding method facilitates assembly; on the other hand, space is left between the upper housing 106 and the printed circuit board 302 for the photosensitive element 301.

[0044] In one embodiment provided in this solution, a limiting boss 107 is provided on the second side of the upper housing 106, the structure of which can be referred to Figure 3 As shown; the imaging circuit board 3 is provided with a limiting hole that mates with the limiting boss 107, and its structure can be referred to Figure 1 As shown. In the AA process, the positioning and orientation of the imaging circuit board 3 are assisted by the corresponding engagement between the limiting hole of the imaging circuit board 3 and the limiting boss 107 of the upper housing 106.

[0045] The miniaturized camera module with heating function provided in this embodiment of the utility model also includes: a wire harness connector 4, the structure of which can be referred to... Figure 1 As shown; the side of the imaging circuit board 3 opposite to the lens 1 is the second side (i.e., the back side). Figure 1 (on the right side), wire harness connector 4 is located on the second side, and its structure can also be referred to Figure 4b and Figure 4c As shown, the second end of the wire harness 105 is used for electrical connection to the wire harness connector 4. As mentioned above, the first side of the imaging circuit board 3 is provided with a photosensitive element 301. In this design, the wire harness 105 is electrically connected to the second side of the imaging circuit board 3 to make full use of the structural space and achieve miniaturization of the camera module.

[0046] In one embodiment provided in this solution, the edge of the imaging circuit board 3 is provided with a wire groove, the structure of which can be referred to Figure 4a , Figure 4b and Figure 4c As shown; the second end of the wire harness 105 passes through the wire groove and is electrically connected to the wire harness connector 4, the structure of which can be referred to Figure 1 and Figure 5 As shown. This configuration is to avoid increasing the cross-sectional area of ​​the camera module and to improve the miniaturization of the camera module.

[0047] In one embodiment provided in this solution, the detachable pre-installed structure is high-temperature tape (not shown in the figure). The wiring harness 105 connecting the heating component extends from the inside of the lens 1 to the inside of the upper housing 106 cavity, and can be attached to the outside of the upper housing 106 with high-temperature tape, which can then be removed for easy operation.

[0048] In one embodiment provided in this solution, the outer shell of lens 1 and the upper housing 106 are an integral structure, simplifying the assembly process. Its structure can be referred to... Figure 1 , Figure 2 and Figure 3 As shown, 101 is the lens, 103 is the cap, and 104 is the lens barrel. Of course, the lens 1 and the upper housing 106 can also be connected by a threaded connection. The advantage of this invention is that this structural design is also suitable for connecting the lens 1 and the upper housing 106 by a threaded connection, and fixing them with glue or laser welding. This modification does not affect the overall assembly process and maintains both production feasibility and product reliability.

[0049] In one embodiment provided in this solution, the outer shell of lens 1 and the upper shell 106 are both made of metal and are made into a whole by cold forging process, which has good strength performance.

[0050] The miniaturized camera module with heating function provided in this embodiment of the utility model further includes: a sealing ring 2, a power supply circuit board 5, and a lower housing 7, the structure of which is as follows: Figure 1 , Figure 6a and Figure 6b As shown; the power supply circuit board 5 is fixed inside the lower housing 7, and the sealing ring 2 is installed between the upper housing 106 and the lower housing 7.

[0051] Figure 7This is a flowchart of the product assembly process in this embodiment. The miniaturized camera module with heating function involved in this utility model requires pre-production preparation, PCBA cleaning, and sensor cleaning before production. Simultaneously, the housing undergoes ultrasonic cleaning, baking, and the application of traceability barcodes. After cleaning, the dispensing areas of the upper housing 106 and PCBA_1 board (i.e., imaging circuit board 3) are plasma-treated to increase the bonding stability of the AA adhesive. The six-axis gripper of the AA machine holds the lens 1 and the integrated structure of the upper housing 106. The imaging circuit board 3 is installed in the AA fixture (the power supply circuit board 5 is pre-assembled in the AA fixture), and AA adhesive is applied to the dispensing area (first bonding structure 9) of the imaging circuit board 3. The six-axis gripper of the AA machine holds the lens and imaging circuit board 3 for the AA process, and pre-curing is completed by UV lamp irradiation. The pre-cured lens 1, upper housing 106, and imaging circuit board 3 are then removed and subjected to high-temperature baking for further curing. Remove the high-temperature tape, connect the wiring harness 105 to the wiring harness connector 4 on the back of the imaging circuit board 3, and install the sealing ring 2 on the lower housing 7. This completes the assembly between the power supply circuit board 5 and the lower housing 7, as well as the assembly between the lower housing 7 and the upper housing 106. After the camera module assembly is completed, functional testing, offline testing, and final inspection are required before packaging and warehousing.

[0052] Figure 8 These are the structural design embodiments proposed by this utility model for different production volumes, wherein (1) is a mass production structural scheme and (2) is a small batch production structural scheme.

[0053] The following is a further description of this solution with reference to specific embodiments:

[0054] A miniaturized camera module with heating function is structurally composed of a lens 1, an imaging circuit board 3, a power supply circuit board 5, a lower housing 7, a board-to-board connector 10, a wire harness connector 4, an RF coaxial board-end connector 6, an RF connector 8, AA glue, a sealing ring 2, and screws.

[0055] in:

[0056] 1. The lens 1 contains a heating resistor and an NTC thermistor. The lens 1 is designed as an integrated structure of the lens 1 and the upper housing 106 using a cold forging process. The FPC flexible flat cable (i.e., wire harness 105) connecting the heating resistor and the NTC thermistor extends from the inside of the lens 1 to the inside of the upper housing 106 cavity, and can be attached to the outside of the upper housing 106 with high-temperature tape.

[0057] 2. Both the upper housing 106 and the lower housing 7 are made of metal. The upper housing 106 is an integral structure with the lens 1, and the power supply circuit board 5 can be fixed inside the lower housing 7 with screws. All housing surfaces are treated with electrophoresis or oxidation to form an insulating coating, which has good corrosion resistance and wear resistance.

[0058] 3. The imaging circuit board 3 and the power supply circuit board 5 are circuit board assemblies of the camera module. The lens 1 and the upper housing 106 are formed into an integral structural component using a cold forging process. The wiring harness 105 is located inside the cavity of the upper housing. The imaging circuit board 3 has a groove on its outer surface structure to allow the wiring harness 105 to pass through. A sensor photosensitive element 301 is soldered onto the front side of the imaging circuit board 3 using an SMT process, and an AA adhesive dispensing area (i.e., the second adhesive bonding structure 108) is provided. A wiring harness connector 4 is soldered onto the back side of the imaging circuit board 3 to connect the wiring harness 105.

[0059] 4. The AA adhesive is a special adhesive used in the AA process of camera modules, making the lens 1 and the upper housing 106 an integrated structural component, simplifying the assembly process and enabling the connection of the wiring harness 105 inside the camera module housing. The AA adhesive is applied to the front of the imaging circuit board 3, and the imaging circuit board 3 is directly AA-processed with the lens. After AA and high-temperature curing are complete, the wiring harness 105 can be connected to the wiring harness connector 4 on the back of the imaging circuit board 3. This assembly sequence allows the wiring harness 105 inside the lens to be connected after AA curing, achieving the connection of the power and signal lines inside the lens without affecting the AA accuracy.

[0060] 5. The lower housing 7 is assembled with the power supply circuit board 5.

[0061] 6. The board-to-board connector 10 is soldered to the mating surface of the imaging circuit board 3 and the power supply circuit board 5, the RF coaxial board-end connector 6 is soldered to the mating surface of the power supply circuit board 5 and the lower housing 7, and the RF connector 8 is assembled with the lower housing 7.

[0062] To achieve the connection between lens 1 and imaging circuit board 3 via adhesive, and the connection of wire harness 105 after AA curing, this utility model provides an assembly method for a miniaturized vehicle-mounted heated camera, including the following steps:

[0063] 1. Design the AA fixture in the AA machine, which can be pre-installed with a common power supply circuit board 5, and put the imaging circuit board 3 into the AA fixture, and connect the board-to-board connector 10.

[0064] 2. Apply adhesive to a designated area on the front surface of the imaging circuit board 3 (i.e., the first adhesive bonding structure 9).

[0065] 3. Power the imaging circuit board 3 and drive the photosensitive element 301 to work;

[0066] 4. Place the lens 1 with wire harness 105 and the upper housing 106 in the same position to ensure that the wire harness 105 and the wire groove in the imaging circuit board 3 are on the same side, and fix the wire harness 105 to the outside of the upper housing 106 with high temperature tape.

[0067] 5. The six-axis gripper of the AA machine moves the lens to the upper end of the imaging circuit board 3 for the AA process. The imaging circuit board 3 has a limit hole, which corresponds to the limit boss 107 of the upper housing 106 to assist in positioning the position and orientation of the imaging circuit board 3.

[0068] 6. After the AA process is completed, turn on the UV lamp to irradiate the AA adhesive for a certain period of time to complete the pre-curing.

[0069] 7. Transfer the pre-cured semi-finished product to a high-temperature oven for high-temperature heat curing;

[0070] 8. Install the power supply circuit board 5 into the lower housing 7 and secure it with two screws. Install the sealing ring 2 into the lower housing 7. At the same time, remove the cured high-temperature tape and connect the wiring harness 105 to the wiring harness connector 4 on the back of the imaging circuit board 3. Connect the imaging circuit board 3 and the power supply circuit board 5 through the board-to-board connector 10. At this time, the lower housing 7 and the lens 1 are also in the position to be fixed. Secure them with two screws to complete the assembly.

[0071] This utility model can realize the AA process of extending the wire harness 105 from the inside of the lens 1 without modifying the AA machine. The process is simple and reliable. The overall structural design is conducive to improving the lens integration and reliability, and realizes the miniaturization design of the vehicle camera module.

[0072] In summary, the miniaturized camera module with heating function proposed in this utility model has a unique structural design: the lens 1 of the wiring harness 105 and the upper housing 106 are integrated into a single unit through a cold forging process. The wiring harness 105 can be adhered to the side of the upper housing 106 with high-temperature adhesive tape and held in place. The AA dispensing area is placed on the surface of the imaging circuit board 3 opposite to the lens, and the AA process is the same as that of common A lenses, requiring no modification to the AA machine. The imaging circuit board 3 has a groove for the wiring harness 105 to pass through and connect to the wiring harness connector 4 on the back of the imaging circuit board 3. A power supply circuit board 5 can be pre-fixed in the lower housing 7 and assembled after the lens 1 and the imaging circuit board 3 have completed AA and high-temperature curing. The camera module produced using this structural design can achieve power supply and temperature reading for heating the lens 1 through the wiring harness 105. The wiring harness connection has high stability and long service life, and the entire assembly process is simple and does not affect the AA process.

[0073] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0074] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A miniaturized camera module with heating function, characterized in that, include: Lens (1), wiring harness (105), upper housing (106) and imaging circuit board (3); The lens (1) is disposed on the first side of the upper housing (106), the first end of the wire harness (105) is connected to the heating assembly of the lens (1), the middle section of the wire harness (105) is led out through the cavity of the upper housing (106) through a detachable pre-installed structure; the second end of the wire harness (105) extends out from the second side of the upper housing (106) for electrically connecting to the imaging circuit board (3). The imaging circuit board (3) has a first surface opposite to the lens (1), and the first surface is provided with a first adhesive structure (9). The second side of the upper housing (106) is provided with a second adhesive structure (108) for cooperating with the first adhesive structure (9).

2. The miniaturized camera module with heating function according to claim 1, characterized in that, The first side of the imaging circuit board (3) is provided with a photosensitive element (301), and the first adhesive structure (9) is arranged around the photosensitive element (301).

3. The miniaturized camera module with heating function according to claim 1, characterized in that, The first adhesive structure (9) and / or the second adhesive structure (108) are adhesive bosses.

4. The miniaturized camera module with heating function according to claim 1, characterized in that, Also includes: The wire harness connector (4) is located on the second surface of the imaging circuit board (3) which is opposite to the lens (1). The second end of the wire harness (105) is used for electrical connection to the wire harness connector (4).

5. The miniaturized camera module with heating function according to claim 4, characterized in that, The edge of the imaging circuit board (3) is provided with a wire pass groove, and the second end of the wire harness (105) passes through the wire pass groove and is electrically connected to the wire harness connector (4).

6. The miniaturized camera module with heating function according to claim 1, characterized in that, The detachable pre-assembled structure is made of high-temperature tape.

7. The miniaturized camera module with heating function according to claim 1, characterized in that, The upper housing (106) is provided with a limiting boss (107) on the second side. The imaging circuit board (3) is provided with a limiting hole that cooperates with the limiting boss (107).

8. The miniaturized camera module with heating function according to any one of claims 1-7, characterized in that, The outer shell of the lens (1) and the upper shell (106) are an integral structure.

9. The miniaturized camera module with heating function according to claim 1, characterized in that, The heating component is a heating pad (102), which includes a heating resistance sheet and an NTC thermistor.

10. The miniaturized camera module with heating function according to claim 1, characterized in that, Also includes: Sealing ring (2), power supply circuit board (5) and lower housing (7); The power supply circuit board (5) is fixed inside the lower housing (7), and the sealing ring (2) is installed between the upper housing (106) and the lower housing (7).

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