On-vehicle camera

Abstract

The utility model discloses an automobile -mounted camera, including the shell that the lens hole and the wiring hole are set up with the shell wall respectively, the lens that is set up in the lens hole and is sealedly connected with the lens hole, the circuit board that assembles in the shell and the connector of the external connecting cable that assembles at the wiring hole, the shell is sealedly connected by front shell and back cover, and the connector is sealedly connected between the corresponding connection hole, and the inner chamber of shell is filled with the heat -conducting liquid of electric insulation, and the circuit board is immersed in the heat -conducting liquid. The embodiment makes the whole circuit board immerse in the heat -conducting liquid, and the heat -conducting liquid with the flowability can effectively cover each heating electronic element surface of the circuit board, when the automobile -mounted camera works, the heat generated by the electronic element on the circuit board can be conducted to the shell by the heat -conducting liquid and realize the heat dissipation, and moreover, the heat -conducting liquid electric insulation, will not influence the normal work of the electronic element on the circuit board, guarantees the normal image acquisition work of automobile -mounted camera.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted camera equipment technology, and in particular to a vehicle-mounted camera. Background Technology

[0002] To meet the demand for high-quality imaging from vehicle cameras, the resolution of vehicle cameras has increased significantly, which has also led to a surge in the heat generated during operation. As a result, higher requirements have been placed on the heat dissipation performance of vehicle cameras.

[0003] Existing vehicle cameras primarily employ thermal conductive devices (such as thermally conductive metals, thermally conductive grease, or graphite thermal films) with one end contacting the main heat-generating components inside the camera (such as chips on a circuit board) and the other end contacting the housing. This conducts heat to the housing, which then dissipates it further to the outside. However, these thermal conductive devices have low thermal conductivity and are relatively cumbersome to install. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is to provide a vehicle-mounted camera that can effectively enhance heat dissipation.

[0005] To solve the above-mentioned technical problems, the present utility model provides the following technical solution: a vehicle-mounted camera, comprising a housing with a lens hole and a wiring hole respectively opened in the housing wall, a lens passing through the lens hole and sealed to the lens hole, a circuit board assembled in the housing, and a connector for external cables assembled at the wiring hole. The housing is formed by sealingly connecting a front shell and a rear cover. The connector is correspondingly sealed to the wiring hole. The inner cavity of the housing is filled with an electrically insulating heat-conducting liquid, and the circuit board is immersed in the heat-conducting liquid.

[0006] Furthermore, the lens includes a lens barrel and several lenses sequentially assembled within the lens barrel along the optical axis. One end of the lens barrel is inserted into the lens hole, and 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, and the space inside the lens barrel between the outermost lens and the circuit board is filled with the heat-conducting liquid.

[0007] Furthermore, the heat-conducting fluid is a fluorinated fluid, a heat-conducting silicone oil, a mineral heat-conducting oil, or an ether-based heat-conducting oil.

[0008] Furthermore, 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 cavity.

[0009] Furthermore, the inner wall of the front shell 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.

[0010] Furthermore, 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.

[0011] Furthermore, the sealing plug is formed by curing a first sealant that fills the injection hole.

[0012] Furthermore, 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 through a second sealant.

[0013] Furthermore, the front housing has lens holes and openings on its opposite side walls, the circuit board is inserted into the front housing through the openings, the rear cover is sealed to the opening of the front housing and covers the opening, and the rear cover has wiring holes.

[0014] Furthermore, 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.

[0015] After adopting the above technical solution, the present utility model embodiment has at least the following beneficial effects: The present utility model embodiment seals the front shell and rear cover of the housing, and at the same time, seals the lens and lens hole, and the connector and wiring hole, so that the inner cavity of the housing forms a sealed space. This sealed space is filled with an electrically insulating heat-conducting liquid, so that the circuit board is immersed in the heat-conducting liquid. The fluid heat-conducting liquid can effectively contact the surface of each electronic component on the circuit board, so that when the vehicle camera is working, the heat generated by the electronic components on the circuit board can be quickly conducted to the housing by the heat-conducting liquid to achieve heat dissipation; moreover, the heat-conducting liquid is electrically insulating and will not affect the normal operation of the electronic components on the circuit board, ensuring the normal image acquisition operation of the vehicle camera. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of an optional embodiment of the vehicle-mounted camera of this utility model.

[0017] Figure 2 This is a cross-sectional structural diagram of another optional embodiment of the vehicle-mounted camera of this utility model. Detailed Implementation

[0018] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present utility model and are not intended to limit the present utility model. Moreover, the embodiments and features in the embodiments of the present application can be combined with each other unless otherwise specified.

[0019] like Figure 1 As shown, an optional embodiment of this utility model provides a vehicle-mounted camera, including a housing 1 with a lens hole 10 and a wiring hole 12 respectively opened in the housing wall, a lens 3 passing through the lens hole 10 and sealed to the lens hole 10, a circuit board 5 assembled in the housing 1, and a connector 7 for external cables assembled at the wiring hole 12. The housing 1 is formed by a front shell 13 and a rear cover 14 sealed together. The connector 7 is correspondingly sealed to the wiring hole 12. The inner cavity 15 of the housing 1 is filled with an electrically insulating heat-conducting liquid, and the circuit board 5 is immersed in the heat-conducting liquid.

[0020] This embodiment of the invention seals the front shell 13 and rear cover 14 of the housing 1 together, and seals the lens 3 with the lens hole 10 and the connector 7 with the wiring hole 12, thus forming a sealed space in the inner cavity 15 of the housing 1. This sealed space is filled with an electrically insulating heat-conducting liquid, immersing the circuit board 5 in the liquid. The fluid heat-conducting liquid effectively contacts the surfaces of the electronic components on the circuit board 5, allowing the heat generated by the electronic components on the circuit board 5 to be quickly conducted to the housing 1 for heat dissipation when the vehicle camera is working. Furthermore, the heat-conducting liquid is electrically insulating and will not affect the normal operation of the electronic components on the circuit board 5, ensuring normal image acquisition by the vehicle camera.

[0021] Specifically, the circuit board 5 typically has a photosensitive chip 50 assembled in a position directly opposite the lens 3.

[0022] In one optional embodiment of this utility model, such as Figure 1 and Figure 2As shown, the lens 3 includes a lens barrel 30 and several lenses 32 sequentially assembled within the lens barrel 30 along the optical axis. One end of the lens barrel 30 is inserted into the lens aperture 10. The outer wall of the lens barrel 30 is sealed to the lens aperture 10. The outermost lens 32 is sealed to the inner wall of the lens barrel 30. The space 34 between the outermost lens 32 and the circuit board 5 inside the lens barrel 30 is filled with the heat-conducting fluid. In this embodiment, the heat-conducting fluid fills the space 34 between the lenses 32 within the lens barrel 30, replacing the traditional air. This provides better stability, reduces light loss, and improves the light throughput of the lens 3, further enhancing the imaging effect of the vehicle camera. Moreover, when the circuit components on the circuit board 5 generate heat, causing a localized high temperature in the lens 3, the heat-conducting fluid filling the lens barrel 30 can quickly conduct heat, preventing temperature drift in the lens 3.

[0023] In specific implementation, the heat-conducting liquid in the lens barrel 30 can be injected by drilling holes in the lens barrel 30 and then sealing the holes; or, during the assembly of the lens 3, the heat-conducting liquid can be directly filled into the gap 34; in order to avoid the formation of air refraction layer by air bubbles or air gaps in the lens barrel 30, the inner cavity of the lens barrel 30 should be filled with heat-conducting liquid as much as possible. If the inner cavity of the lens barrel 30 is connected to the inner cavity of the housing 1, both should be filled.

[0024] In one optional embodiment of this invention, the heat-conducting fluid is a fluorinated fluid, thermally conductive silicone oil, mineral thermally conductive oil, or ether-based thermally conductive oil. In this embodiment, the fluorinated fluid is a commonly used coolant in the electronics industry, possessing electrical insulation, chemical inertness, and non-flammability, effectively achieving heat conduction and dissipation. The main types of fluorinated fluids are hydrofluoroethers and perfluoropolyethers. Of course, it is understood that the heat-conducting fluid can also be made from other composite liquids and colorless, transparent polymer materials with similar properties.

[0025] In one optional embodiment of this utility model, such as Figure 2 As shown, one end face of the lens barrel 30 inserted into the lens hole 10 is sealed to the circuit board 5, thus separating the inner cavity of the lens barrel 30 from the inner cavity 15 of the housing 1. In this embodiment, separating the inner cavity of the lens barrel 30 from the inner cavity 15 of the housing 1 allows for the filling of different heat-conducting liquids in the inner cavity of the lens barrel 30 and the inner cavity 15 of the housing 1, thereby reducing costs. For example, the inner cavity 15 of the housing 1 does not need to be completely filled and can use various electrically insulating heat-conducting liquids, while the inner cavity of the lens barrel 30 must be completely filled and can only use a colorless and transparent heat-conducting liquid to avoid affecting light propagation.

[0026] In one optional embodiment of this utility model, such as Figure 1 and Figure 2As shown, the inner wall of the front shell 13 forms a support platform 131 for supporting and positioning the circuit board 5, and the circuit board 5 is mounted and fixed on the support platform 131. In this embodiment, the support platform 131 facilitates the support and positioning of the circuit board 5. In specific implementation, the support platform 131 can be symmetrically arranged on the steps of opposite side walls of the front shell 13; or it can be an annular step formed on the periphery of the inner wall of the front shell 13.

[0027] In one optional embodiment of this utility model, such as Figure 1 and Figure 2 As shown, an injection hole 133 is provided on one side of the shell wall of the front shell 13 or on the rear cover 14 for injecting the heat-conducting fluid into the inner cavity 15 of the shell 1. The injection hole 133 is sealed by a sealing plug 135 after the heat-conducting fluid is injected. In this embodiment, by providing an injection hole 133 on one side of the shell wall of the front shell 13, it is convenient to inject the heat-conducting fluid into the inner cavity 15 of the shell 1. After the heat-conducting fluid is injected, it is only necessary to insert a corresponding sealing plug 135 into the injection hole 15 to ensure a seal.

[0028] In one optional embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the sealing plug 135 is formed by curing a first sealant that fills the injection hole 133. In this embodiment, the first sealant is directly filled into the injection hole 133, and after the first sealant cures, it can serve as the sealing plug 135 to achieve a seal, which is convenient for operation.

[0029] In one optional embodiment of this utility model, such as Figure 1 and Figure 2 As shown, a flange ring 36 is formed by a radially protruding outer wall in the middle section of the lens 3. The lens 3 is sealed and bonded to the periphery of the outer opening of the lens hole 10 using the flange ring 36 and a second sealant 38. In this embodiment, the lens 3 is bonded to the periphery of the outer opening of the lens hole 10 using the flange ring 36 and the second sealant 38, effectively achieving a sealed connection between the lens 3 and the periphery of the outer opening of the lens hole 10, and preventing the leakage of heat transfer fluid.

[0030] In one optional embodiment of this utility model, such as Figure 1 and Figure 2As shown, the front housing 13 has a lens hole 10 and an opening 137 on its opposite side walls. The circuit board 5 is installed into the front housing 13 through the opening 137. The rear cover 14 is sealed to the opening 137 of the front housing 13, correspondingly covering the opening 137. The wiring hole 12 is provided on the rear cover 14. In this embodiment, the front housing 13 has an opening 137 to facilitate the installation of the circuit board 5 into the front housing 13; and when the circuit board 5 is installed into the front housing 13, the opening 137 is sealed by the rear cover 18, thus achieving a sealed connection between the front housing 13 and the rear cover 14.

[0031] In one optional embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the front shell 13 and the rear cover 14 are sealed together by a sealing gasket 17 placed between them; or, the front shell 13 and the rear cover 14 are joined together by welding. In this embodiment, by setting a sealing gasket 17 or welding the front shell 13 and the rear cover 14, the sealing between the front shell 13 and the rear cover 14 can be ensured, preventing the leakage of heat transfer fluid. In specific implementation, depending on the materials and / or shapes of the front shell 13 and the rear cover 14, welding processes such as laser welding and ultrasonic welding can be flexibly selected to achieve a sealed connection between the two.

[0032] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the scope of protection of the present invention.

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 and the wiring hole are correspondingly sealed together. The inner cavity of the housing is filled with an electrically insulating heat-conducting liquid, and 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.

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