Vehicle-mounted camera

Abstract

The embodiment of the invention provides a vehicle-mounted camera which comprises a shell, a lens hole and a wiring hole are formed in the shell wall of the shell, the lens penetrates through the lens hole and is in sealed connection with the lens hole, the circuit board is assembled in the shell, the connector is assembled at the wiring hole and is externally connected with a cable, and the shell is formed by connecting a front shell and a rear cover in a sealed mode. The connectors are correspondingly connected with the connecting holes in a sealed mode, the inner cavity of the shell is filled with electrically-insulated heat conduction liquid, and the circuit board is immersed in the heat conduction liquid. According to the vehicle-mounted camera, the whole circuit board is immersed in the heat conduction liquid, the heat conduction liquid with fluidity can effectively cover the surfaces of all heating electronic elements of the circuit board, and when the vehicle-mounted camera works, heat generated by the electronic elements on the circuit board can be rapidly conducted to the shell through the heat conduction liquid to achieve heat dissipation; moreover, the heat-conducting liquid is electrically insulated, so that the normal work of electronic elements on the circuit board is not influenced, and the normal image acquisition work of the vehicle-mounted camera is ensured.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of vehicle-mounted camera equipment, in particular to a vehicle-mounted camera. BACKGROUND

[0002] In order to meet the demand of high-quality imaging of the vehicle-mounted camera, the resolution of the vehicle-mounted camera is greatly increased, which also leads to a sharp increase in the heat generated by the vehicle-mounted camera when working, and thus higher requirements are put forward for the heat dissipation performance of the vehicle-mounted camera.

[0003] The existing vehicle-mounted camera mainly adopts a heat conduction device (for example, heat-conducting metal, heat-conducting silicone grease or graphite heat-conducting film) to contact the main heat generating part (such as a chip on a circuit board) inside the vehicle-mounted camera at one end and contact the shell at the other end, so as to conduct heat to the shell, and then the shell further dissipates heat to the outside. However, the heat conduction efficiency of the above heat conduction device is not high, and the installation is relatively troublesome. SUMMARY

[0004] The technical problem to be solved by the embodiment of the present application is to provide a vehicle-mounted camera which can effectively enhance the heat dissipation effect.

[0005] In order to solve the above technical problem, the embodiment of the present application provides the following technical scheme: a vehicle-mounted camera, comprising a shell body with a lens hole and a connecting hole formed in the shell wall respectively, a lens inserted into the lens hole and in sealed connection with the lens hole, a circuit board assembled in the shell body, and a connector assembled with a connecting cable at the connecting hole, the shell body is sealed and connected by a front shell and a rear cover, the connector is in corresponding sealed connection with the connecting hole, the inner cavity of the shell body is filled with electrically insulating heat-conducting liquid, and the circuit board is immersed in the heat-conducting liquid.

[0006] Further, the lens comprises a lens barrel and a plurality of lenses assembled in the lens barrel along the optical axis, one end of the lens barrel is inserted into the lens hole, the outer side wall of the lens barrel is in sealed connection with the lens hole, the outermost one of the lenses is in sealed connection with the inner wall of the lens barrel, and the space between the outermost one of the lenses and the circuit board in the lens barrel is filled with the heat-conducting liquid.

[0007] Further, the heat-conducting liquid is fluorinated liquid, heat-conducting silicone oil, mineral heat-conducting oil or ether heat-conducting oil.

[0008] Further, the end face of the one end of the lens barrel inserted into the lens hole is in sealed connection with the circuit board to separate the inner cavity of the lens barrel from the inner cavity of the shell cavity.

[0009] Further, the inner wall of the front shell forms a bearing table for bearing and positioning the circuit board, and the circuit board is installed and fixed on the bearing table.

[0010] Further, a liquid injection hole for injecting the heat-conducting liquid into the inner cavity of the shell is formed on one side wall of the front shell or the rear cover, and the liquid injection hole is sealed by a sealing plug after the heat-conducting liquid is injected.

[0011] Further, the sealing plug is formed by curing of a first sealing glue filled in the liquid injection hole.

[0012] Further, the middle section outer wall of the lens is radially protruded to form a flange ring, and the lens is sealed and bonded to the outer side opening of the lens hole by the flange ring through a second sealing glue.

[0013] Further, the front shell is provided with the lens hole and the opening on the opposite two side walls respectively, the circuit board is loaded into the front shell through the opening, the rear cover is sealingly connected to the opening of the front shell to correspondingly cover the opening, and the wiring hole is formed on the rear cover.

[0014] Further, the front shell and the rear cover are sealingly connected through a sealing gasket arranged between the two by a gasket, or the front shell and the rear cover are integrated by a welding process.

[0015] After the above technical solution is adopted, the embodiments of the present application have at least the following beneficial effects: the front shell and the rear cover of the shell are sealingly connected, meanwhile, the lens and the lens hole, the connector and the connecting hole are also sealingly connected, so that the inner cavity of the shell forms a sealed space, the heat-conducting liquid with electrical insulation is filled in the sealed space, the circuit board is immersed in the heat-conducting liquid, the heat-conducting liquid with fluidity can effectively contact the surface of each electronic element on the circuit board, so that when the vehicle-mounted camera works, the heat generated by the electronic elements on the circuit board can be quickly conducted to the shell to realize heat dissipation; moreover, the heat-conducting liquid is electrically insulated, and does not affect the normal work of the electronic elements on the circuit board, so as to ensure the normal image acquisition work of the vehicle-mounted camera. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a cross-sectional structure schematic view of an optional embodiment of the vehicle-mounted camera of the present application.

[0017] Figure 2 is a cross-sectional structure schematic view of another optional embodiment of the vehicle-mounted camera of the present application. DETAILED DESCRIPTION

[0018] The present application will be further described in detail below in combination with the drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present application, and are not intended to limit the present application, and the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0019] As Figure 1 shown in the figure, one optional embodiment of the present application provides a vehicle-mounted camera, which comprises a shell 1 with a lens hole 10 and a connecting hole 12 respectively opened in the shell wall, a lens 3 penetrating the lens hole 10 and being in sealed connection with the lens hole 10, a circuit board 5 assembled in the shell 1, and a connector 7 assembled at the connecting hole 12 for connecting an external cable, the shell 1 is in sealed connection with a front shell 13 and a rear cover 14, the connector 7 is in corresponding sealed connection with the connecting hole 12, and the inner cavity 15 of the shell 1 is filled with electrically insulating and heat-conducting liquid, and the circuit board 5 is immersed in the heat-conducting liquid.

[0020] The front shell 13 and the rear cover 14 of the shell 1 are in sealed connection, and the lens 3 and the lens hole 10 and the connector 7 and the connecting hole 12 are in corresponding sealed connection, so that the inner cavity 15 of the shell 1 forms a sealed space, the electrically insulating and heat-conducting liquid is filled in the sealed space, and the circuit board 5 is immersed in the heat-conducting liquid. The heat-conducting liquid with fluidity can effectively contact the surfaces of each electronic element on the circuit board 5, so that when the vehicle-mounted camera works, the heat generated by the electronic elements on the circuit board 5 can be quickly conducted to the shell 1 to achieve heat dissipation; moreover, the heat-conducting liquid is electrically insulating, which does not affect the normal work of the electronic elements on the circuit board 5, and ensures the normal image acquisition work of the vehicle-mounted camera.

[0021] Specifically, the circuit board 5 is usually assembled with a photosensitive chip 50 at a position opposite to the lens 3.

[0022] In one optional embodiment of the present application, as Figure 1 and Figure 2 shown in the figure, the lens 3 comprises a lens barrel 30 and a plurality of lenses 32 assembled in the lens barrel 30 along the optical axis, one end of the lens barrel 30 is inserted into the lens hole 10, the outer side wall of the lens barrel 30 is in sealed connection with the lens hole 10, the outermost one of the lenses 32 is in sealed connection with the inner wall of the lens barrel 30, and the space 34 between the outermost one of the lenses 32 and the circuit board 5 is filled with the heat-conducting liquid. In this embodiment, the heat-conducting liquid fills the space 34 between each lens 32 in the lens barrel 30 instead of the traditional air, which has better stability and is not easy to cause light loss, and is conducive to improving the light flux of the lens 3 and further enhancing the imaging effect of the vehicle-mounted camera; moreover, when the circuit elements on the circuit board 5 generate heat and the temperature of the lens 3 is relatively high, the heat-conducting liquid filled in the lens barrel 30 can quickly realize heat conduction, avoiding the temperature drift of the lens 3.

[0023] In the embodiment, the heat-conducting liquid in the lens barrel 30 can be injected by punching the lens barrel 30 and then sealing the hole, or the heat-conducting liquid can be directly filled in the gap 34 during the assembly of the lens 3. In order to avoid the formation of air refraction layer due to the air bubbles or air gap in the lens barrel 30, the inner cavity of the lens barrel 30 should be filled with the heat-conducting liquid as much as possible. If the inner cavity of the lens barrel 30 is connected with the inner cavity of the shell 1, both of them should be filled.

[0024] In an optional embodiment of the present application, the heat-conducting liquid is fluorinated liquid, heat-conducting silicon oil, mineral heat-conducting oil or ether heat-conducting oil. In the embodiment, the fluorinated liquid is a cooling liquid commonly used in the electronic industry, which has the characteristics of electrical insulation, chemical inertness and non-flammability, and can effectively realize heat conduction and heat dissipation. The main types of fluorinated liquid are hydrofluoroether and perfluoropolyether. Of course, it can be understood that the heat-conducting liquid can also be realized by using other composite liquids and high-molecular colorless transparent materials with the same characteristics.

[0025] In an optional embodiment of the present application, as shown in Figure 2 , the end face of the one end of the lens barrel 30 inserted into the lens hole 10 is sealingly connected with the circuit board 5 to separate the inner cavity of the lens barrel 30 from the inner cavity 15 of the shell 1. In the embodiment, the inner cavity of the lens barrel 30 is separated from the inner cavity 15 of the shell 1, so that different heat-conducting liquids can be filled in the inner cavity of the lens barrel 30 and the inner cavity 15 of the shell 1 respectively, thereby reducing the cost. For example, the inner cavity 15 of the shell 1 does not have to be filled, and various electrically insulating heat-conducting liquids can be used, while the inner cavity of the lens barrel 3 must be filled and only colorless transparent heat-conducting liquid can be used to avoid affecting the light propagation.

[0026] In an optional embodiment of the present application, as shown in Figure 1 and Figure 2 , the inner wall of the front shell 13 forms a bearing table 131 for bearing and positioning the circuit board 5, and the circuit board 5 is mounted and fixed on the bearing table 131. In the embodiment, the bearing table 131 is provided to facilitate the bearing and positioning of the circuit board 5. In the embodiment, the bearing table 131 can be respectively arranged on the steps of the opposite two side walls of the front shell 13, or be formed on the annular step of the inner wall of the front shell 13.

[0027] In an optional embodiment of the present application, as shown in Figure 1 and Figure 2As shown in the figure, a liquid injection hole 133 for injecting the heat-conducting liquid into the inner cavity 15 of the shell 1 is arranged on one side wall of the front shell 13 or the rear cover 14, and the liquid injection hole 133 is sealed by a sealing plug 135 after the heat-conducting liquid is injected. In this embodiment, the liquid injection hole 133 is arranged on one side wall of the front shell 13, so that the heat-conducting liquid can be conveniently injected into the inner cavity 15 of the shell 1. After the heat-conducting liquid is injected, the sealing plug 135 is only needed to be plugged into the liquid injection hole 15, so that the sealing is ensured.

[0028] In an optional embodiment of the present application, as shown in Figure 1 and Figure 2 the sealing plug 135 is formed by curing the first sealing glue filled in the liquid injection hole 133. In this embodiment, the first sealing glue is directly filled in the liquid injection hole 133, and the sealing plug 135 is formed after the first sealing glue is cured, so that the operation is facilitated.

[0029] In an optional embodiment of the present application, as shown in Figure 1 and Figure 2 the middle section outer wall of the lens 3 is radially protruded to form a flange ring 36, and the lens 3 is sealed and adhered to the outer side hole edge of the lens hole 10 by the second sealing glue 38. In this embodiment, the lens 3 is adhered to the outer side hole edge of the lens hole 10 by the second sealing glue 38 through the flange ring 36, so that the sealing connection between the lens 3 and the outer side hole edge of the lens hole 10 is effectively realized, and the heat-conducting liquid is prevented from leaking out.

[0030] In an optional embodiment of the present application, as shown in Figure 1 and Figure 2 the front shell 13 is provided with the lens hole 10 and an opening 137 on the opposite side walls, respectively. The circuit board 5 is loaded into the front shell 13 through the opening 137, the rear cover 14 is sealingly connected to the opening 137 of the front shell 13 to correspondingly cover the opening 137, and the wiring hole 12 is arranged on the rear cover 14. In this embodiment, the opening 137 is arranged on the front shell 13, so that the circuit board 5 can be conveniently loaded into the front shell 13. After the circuit board 5 is loaded into the front shell 13, the opening 137 is sealingly covered by the rear cover 18, so that the sealing connection between the front shell 13 and the rear cover 14 is realized.

[0031] In an optional embodiment of the present application, as shown in Figure 1 and Figure 2As shown, the front shell 13 and the rear cover 14 are sealingly connected by a sealing gasket 17 arranged therebetween; alternatively, the front shell 13 and the rear cover 14 are integrally connected by a welding process. In this embodiment, the sealing gasket 17 or the welding connection of the front shell 13 and the rear cover 14 can ensure the sealing between the front shell 13 and the rear cover 14, avoiding the leakage of the heat-conducting liquid. In specific implementation, according to the materials and / or shapes of the front shell 13 and the rear cover 14, a laser welding, ultrasonic welding or other welding process can be flexibly selected to realize the sealing connection of the two.

[0032] The embodiments of the present application are described above with reference to the drawings; however, the present application is not limited to the specific embodiments described above, which are merely illustrative rather than restrictive, and any person skilled in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, which are all within the protection scope of the present application.

Claims

1. A vehicle-mounted camera, comprising a housing with a lens hole and a wiring hole respectively formed in its shell wall, a lens passing through and sealed to the lens hole, a circuit board assembled within the housing, and a connector for an external cable assembled at the wiring hole, characterized in that, The housing is formed by a front shell and a rear cover that are sealed together. The connector is sealed to the connection hole. The inner cavity of the housing is filled with an electrically insulating heat-conducting liquid. The circuit board is immersed in the heat-conducting liquid.

2. The vehicle-mounted camera as described in claim 1, characterized in that, The lens includes a lens barrel and several lenses assembled sequentially along the optical axis within the lens barrel. One end of the lens barrel is inserted into the lens hole. The outer wall of the lens barrel is sealed to the lens hole. The outermost lens is sealed to the inner wall of the lens barrel. The space inside the lens barrel between the outermost lens and the circuit board is filled with the heat-conducting liquid.

3. The vehicle-mounted camera as described in claim 1 or 2, characterized in that, The heat transfer fluid is a fluorinated fluid, a thermally conductive silicone oil, a mineral thermally conductive oil, or an ether-based thermally conductive oil.

4. The vehicle-mounted camera as described in claim 2, characterized in that, One end face of the lens barrel inserted into the lens hole is sealed to the circuit board, thereby separating the inner cavity of the lens barrel from the inner cavity of the housing.

5. The vehicle-mounted camera as described in claim 1, characterized in that, The inner wall of the front housing is formed with a support platform for supporting and positioning the circuit board, and the circuit board is mounted and fixed on the support platform.

6. The vehicle-mounted camera as described in claim 1, characterized in that, An injection hole for injecting the heat-conducting fluid into the inner cavity of the housing is provided on one side of the front shell or on the rear cover. The injection hole is sealed by a sealing plug after the heat-conducting fluid is injected.

7. The vehicle-mounted camera as described in claim 6, characterized in that, The sealing plug is formed by curing a first sealant that fills the injection hole.

8. The vehicle-mounted camera as described in claim 1, characterized in that, A flange ring is formed by a radial protrusion on the outer wall of the middle section of the lens, and the lens is sealed and bonded to the periphery of the outer opening of the lens hole by the flange ring and a second sealant.

9. The vehicle-mounted camera as described in claim 1, characterized in that, The front cover has a lens hole and an opening on its opposite side walls. The circuit board is installed into the front cover through the opening. The rear cover is sealed to the opening of the front cover and covers the opening. The rear cover has a wiring hole.

10. The vehicle-mounted camera as described in claim 1 or 9, characterized in that, The front shell and the rear cover are sealed together by a sealing gasket placed between them; or, the front shell and the rear cover are joined together by welding.

Images