Camera rear shell connector

Abstract

The utility model discloses a camera rear shell connector, which comprises a panel-shaped rear shell, a butt joint and a plug connector, wherein the rear shell is internally provided with a mounting cavity; the butt joint and an outer panel of the rear shell are integrally formed; the plug connector is coaxially and fixedly arranged in a butt joint cavity of the butt joint; the plug connector comprises a hollow sleeve conductor and a central conductor which is coaxially kept in the sleeve conductor through an insulating medium; and a circle of boss part for improving the side pressure strength of the connector is annularly arranged at the joint of the butt joint and the outer panel. And a notch part is arranged on one side, which bears tensile stress, of the boss part. According to the design of the notch part, a stress distribution path is reconstructed, a maximum section stress line caused by radial pressure generated by locking of the buckle structure is transferred from the top surface of the boss to the bottom, an axial section is newly added, an original potential fracture track is changed, the potential fracture area is increased, and the side pressure resistance of the connector during plugging is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric connectors, and in particular relates to a camera rear shell connector. Background Art

[0002] With the rapid improvement of automobile intelligence and networking, the application of advanced driver assistance systems (ADAS) and vehicle-mounted cameras is becoming increasingly popular and their functions are constantly enhanced. As the core sensor for vehicle perception of the environment, the performance stability and reliability of vehicle-mounted cameras are directly related to driving safety. Among them, the backshell connector is the key interface for electrical connection and data transmission between the camera module and the vehicle body wiring harness, and its performance is crucial. This connector not only needs to ensure low-loss and low-interference transmission of high-speed video signals (such as LVDS, GMSL, etc.) to meet high-definition video requirements, but also must have excellent mechanical strength, environmental sealing and long-term reliability.

[0003] Currently, the FAKRA connector system is the primary connector interface standard widely used for signal transmission in automotive cameras. Traditional automotive camera backshell connectors typically consist of an injection-molded backshell, a FAKRA male connector (mating connector) integrated into the backshell, and a built-in coaxial connector (consisting of an outer conductor sleeve and an inner conductor center pin). However, in actual use and assembly, the FAKRA male connector of these camera backshell connectors is often integrally injection-molded directly onto the outer wall (outer panel) of the backshell. While this facilitates production, it suffers from poor mechanical strength. When mating with the FAKRA female connector of the vehicle wiring harness, the snap-on area is subject to significant radial pressure, particularly during assembly and when the cable is pulled radially after engagement. Improper force during assembly or use can easily cause the root area of ​​the FAKRA butt connector to fracture, leading to connector failure and a safety hazard. Utility Model Content

[0004] The purpose of the utility model is to design a camera rear shell connector to solve the problems of the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A camera back shell connector includes a panel-shaped back shell with an internal mounting cavity, a docking head integrally formed with the outer panel of the back shell, and a plug-in component coaxially fixed in the docking cavity of the docking head; the plug-in component includes a hollow sleeve conductor and a center conductor coaxially retained in the sleeve conductor by an insulating medium; a boss portion is provided around the connection between the docking head and the outer panel for increasing the lateral pressure strength of the connector.

[0007] Furthermore, the boss portion has a boss top surface connected to the docking joint and a boss bottom surface connected to the outer panel. When the docking joint is subjected to radial external force, the maximum cross-sectional stress line generated is located on the same plane as the boss top surface.

[0008] Furthermore, the docking joint is a FAKRA head that can directly mate with a FAKRA female connector of a vehicle body wiring harness. A snap structure is provided on an outer side wall of the FAKRA head, and the snap structure includes a snap body and a barb.

[0009] Furthermore, the boss portion located at the connection between the buckle body and the outer panel is a lug portion.

[0010] Furthermore, a notch portion opening outward is formed on the lug portion, so that the maximum cross-sectional stress line generated by radial external force at the connection between the docking joint and the outer panel is located on the top surface of the boss, the bottom surface of the boss and the axial section connecting the two.

[0011] Furthermore, the anti-fracture area formed by the combined area of ​​the lug portion and the notch portion is larger than the anti-fracture area formed by the lug portion.

[0012] Furthermore, the maximum stress borne by the combined area of ​​the lug portion and the notch portion is smaller than the maximum stress borne by the lug portion alone.

[0013] Furthermore, the notch portion is located on the top surface of the buckle body, and a transition slope is formed at the connection between the top surface of the boss and the docking joint, so that the stress concentration area generated by the radial external force at the connection between the docking joint and the outer panel can better extend from the top surface of the boss to the bottom surface of the boss.

[0014] Furthermore, a limiting groove is formed on one side of the docking cavity close to the rear shell, and the sleeve conductor is coaxially assembled in the docking cavity and fixed by an injection-molded fixing ring.

[0015] Furthermore, the outer wall of the sleeve conductor is stamped with a first convex point that protrudes outward and abuts against the inner wall of the fixing ring to increase the holding force between the sleeve conductor and the fixing ring; a circle of fixing grooves is arranged on the outer wall of the insulating medium, and the sleeve conductor is stamped with a second convex point that protrudes inward and fits into the fixing groove to increase the holding force between the sleeve conductor and the insulating medium.

[0016] Furthermore, one end of the sleeve conductor used for connecting to the camera board-end connector is provided with an outwardly expanding guide opening.

[0017] Furthermore, the joint between the rear shell and the sleeve conductor, and the joint between the sleeve conductor and the center conductor are filled with sealant.

[0018] Compared with the prior art, the beneficial technical effects of the vehicle-mounted camera rear shell connector provided by the utility model are:

[0019] 1. The utility model adds a boss portion and provides a notch portion on the boss portion at the connection between the top surface of the snap body and the outer side wall of the rear shell, so that the maximum cross-sectional stress line generated by the radial pressure of the docking joint is located on the top surface of the boss, the bottom surface of the boss, and the axial section connecting the two. The generated maximum cross-sectional stress line is partially transferred from the top of the boss to the bottom, which changes the potential fracture trajectory and increases the potential fracture area, significantly enhancing the lateral pressure resistance of the connector during insertion.

[0020] 2. The utility model forms a double mechanical interlocking structure by arranging a first protrusion on the outer wall of the sleeve conductor to abut against the inner wall of the fixing ring, and arranging a second protrusion on the inner wall of the sleeve conductor to engage with the fixing groove of the insulating medium, thereby effectively improving the holding force of the internal components in a vibration environment.

[0021] 3. The utility model solves the problem of sealing failure after multiple plugging and unplugging by filling sealant on the joint surface between the rear shell and the sleeve conductor, and between the sleeve conductor and the center conductor to form a solidified sealing layer, thereby ensuring the long-term dustproof and waterproof reliability of the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described below are only some embodiments. A person skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0023] Figure 1 A schematic structural diagram of a camera rear housing connector provided by an embodiment of the present utility model;

[0024] Figure 2 A cross-sectional view of a camera rear housing connector provided by an embodiment of the present utility model;

[0025] Figure 3 An exploded view of a camera rear housing connector provided by an embodiment of the present utility model;

[0026] Figure 4 A schematic diagram of a potential cross-sectional position of a camera rear housing connector before adding a notch provided by an embodiment of the present utility model;

[0027] Figure 5 A schematic diagram of the potential cross-sectional position of a camera rear shell connector with a notch added provided in an embodiment of the present invention.

[0028] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0029] 1-back shell, 101-outer panel, 102-mounting cavity, 2-butt joint, 201-snap body, 202-barb, 203-boss portion, 204-notch portion, 205-transition slope, 206-lug portion, 3-sleeve conductor, 301-butt joint portion, 302-mounting fixing portion, 303-first protrusion, 304-second protrusion, 305-guide opening, 4-center conductor, 5-insulating medium, 501-fixing groove, 6-sealant, 7-fixing ring, 8-circuit board, 9-board end connector. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0031] The embodiment of the present invention provides a camera rear shell connector, comprising a rear shell 1, a docking head 2 and a connector. Specifically:

[0032] like Figures 1 to 3 As shown, the rear housing 1 is panel-shaped, with an internal mounting cavity 102 to accommodate the circuit board 8 and camera board-end connector 9. The docking connector 2 is a FAKRA connector, integrally molded on the outer panel 101 of the rear housing 1. This connector 2 is used to mate with the FAKRA female connector of the vehicle body wiring harness. Its outer wall is provided with a snap structure, which includes a snap body 201 and a barb 202. This snap structure enables the FAKRA connector to be engaged with the FAKRA female connector of the vehicle body wiring harness, ensuring a reliable connection of the camera rear housing connector. The plug-in end of the docking connector 2, that is, the end away from the rear housing 1, is also provided with an inner chamfer, which can serve as a positioning guide when the connectors are plugged in, thereby ensuring the connector plugging accuracy.

[0033] like Figures 1 to 5As shown, to enhance the connector's lateral compressive strength, a ring of bosses 203 surrounds the connection between the butt joint 2 and the outer panel 101. The bosses 203 located at the connection between the clip body 201 and the outer panel 101 are lugs 206. These bosses 203 have a top surface that abuts the butt joint 2 and a bottom surface that abuts the outer panel 101. When subjected to radial external forces, the maximum cross-sectional stress line (i.e., the area of ​​greatest stress concentration and the distribution line of maximum stress, which is also the path most susceptible to structural fracture) lies on the same plane as the boss top surface. Furthermore, when the FAKRA connector is interlocked with the FAKRA female connector of the vehicle body wiring harness, the side of the butt joint 2 with the snap structure tends to experience greater radial pressure, making the base of the butt joint 2 near the snap structure more susceptible to fracture. Therefore, as a preferred embodiment, the lug portion is formed with an outwardly opening notch 204. This notch 204 is located at the junction of the top surface of the FAKRA head's snap body 201 and the outer panel 101 of the rear housing 1, thereby creating a potential axial cross-section. This increases the fracture resistance area formed by the combined area of ​​the lug portion 206 and the notch 204, making it larger than the fracture resistance area formed by the lug portion 206 itself. When a radial external force acts on the butt joint 2, the maximum cross-sectional stress line generated is located on the axial cross-section connecting the top and bottom surfaces of the boss and the two. This increases the potential fracture area. According to the stress formula σ = F / A, when subjected to the same load F, the larger the fracture area A, the smaller the stress σ. This results in the maximum stress experienced by the combined area of ​​the lug portion 206 and the notch 204 being smaller than the maximum stress experienced by the lug portion 206 alone, thereby reducing the risk of fracture of the butt joint 2. Furthermore, a transition slope 205 is formed at the connection between the top surface of the boss and the docking joint 2 to reduce stress concentration. At the same time, the stress concentration area generated by the radial external force at the connection between the docking joint 2 and the outer panel 101 can be better extended from the top surface of the boss to the bottom surface of the boss, thereby further improving the lateral pressure resistance of the connector during assembly.

[0034] like Figure 2 and Figure 3As shown, the connector is coaxially fixed within the docking cavity of the docking connector 2 and includes a hollow sleeve conductor 3 and a center conductor 4 coaxially retained within the sleeve conductor 3 by an insulating medium 5. The sleeve conductor 3 serves as the outer conductor of the coaxial connector and can provide effective electromagnetic shielding for internal signal transmission. An annular retaining groove is formed on the inner wall of the docking cavity near the rear housing 1. The sleeve conductor 3 is coaxially assembled within the docking cavity and secured by an integrally injection-molded retaining ring 7. The outer wall of the sleeve conductor 3 is stamped with a first protruding point 303 that abuts the inner wall of the retaining ring 7 to increase the retention force between the sleeve conductor 3 and the retaining ring 7. The sleeve conductor 3 includes a docking sleeve portion 301 and a mounting and fixing portion 302. The docking sleeve portion 301 is located within the docking connector 2 and has an inner chamfered end for direct electrical contact with the outer conductor of the FAKRA female connector of the vehicle body wiring harness. The mounting and fixing portion 302 extends into the mounting cavity 102 of the rear housing 1 and is provided with an outwardly expanding guide opening 305 to facilitate connection with the board-end connector 9 on the circuit board 8. A ring of fixing grooves 501 is provided on the outer wall of the insulating medium 5. The sleeve conductor 3 is also stamped with a second protrusion 304 protruding inwardly and fitting within the fixing groove 501, thereby increasing the holding force between the sleeve conductor 3 and the insulating medium 5. The present invention forms a dual mechanical interlocking structure by providing a first protrusion 303 on the outer wall of the sleeve conductor 3 that abuts the inner wall of the fixing ring 7, and a second protrusion 304 on the inner wall of the sleeve conductor 3 that fits within the fixing groove 501 of the insulating medium 5, effectively improving the holding force of the internal components in a vibration environment.

[0035] like Figure 2 and Figure 3 As shown, to prevent the connector from loosening and leaking after repeated plugging and unplugging, and to improve the connector's sealing performance, as a preferred embodiment, the joints between the rear shell 1 and the sleeve conductor 3, as well as the joints between the sleeve conductor 3 and the center conductor 4, are further filled with sealant 6. After curing, the sealant 6 forms a waterproof sealing layer, effectively preventing external dust and moisture from entering the connector through the assembly gap.

[0036] The above-described embodiments merely represent implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A camera rear housing connector, characterized in that: The invention comprises a rear shell (1) in the shape of a panel and having an internal mounting cavity (102), a docking head (2) integrally formed with an outer panel (101) of the rear shell (1), and a plug-in component coaxially fixed in the docking cavity of the docking head (2); the plug-in component comprises a hollow sleeve conductor (3) and a center conductor (4) coaxially retained in the sleeve conductor (3) through an insulating medium (5); a boss portion (203) is provided around the connection between the docking head (2) and the outer panel (101).

2. The camera rear housing connector according to claim 1, characterized in that: The boss portion (203) has a boss top surface connected to the docking joint (2) and a boss bottom surface connected to the outer panel (101); when the docking joint (2) is subjected to radial external force, the maximum cross-sectional stress line generated is located on the same plane as the boss top surface.

3. The camera rear housing connector according to claim 2, characterized in that: The docking connector (2) is a FAKRA head capable of directly mating with a FAKRA female connector of a vehicle body wiring harness, and a snap-fit ​​structure is provided on an outer side wall of the FAKRA head. The snap-fit ​​structure comprises a snap-fit ​​body (201) and a barb (202).

4. The camera rear housing connector according to claim 3, characterized in that: The boss portion (203) located at the connection between the buckle body (201) and the outer panel (101) is a lug portion (206).

5. The camera rear housing connector according to claim 4, characterized in that: The lug portion (206) is formed with a notch portion (204) opening outward, so that the maximum cross-sectional stress line generated by radial external force at the connection between the butt joint (2) and the outer panel (101) is located on the boss top surface, the boss bottom surface, and the axial cross section connecting the two.

6. The camera rear housing connector according to claim 5, characterized in that: The anti-fracture area formed by the combined area of ​​the lug portion (206) and the notch portion (204) is larger than the anti-fracture area formed by the lug portion (206).

7. The camera rear housing connector according to claim 6, characterized in that: The maximum stress borne by the combined area of ​​the lug portion (206) and the notch portion (204) is smaller than the maximum stress borne by the lug portion (206) alone.

8. The camera rear housing connector according to claim 5, characterized in that: The notch portion (204) is located on the top surface of the buckle body (201), and a transition slope (205) is formed at the connection between the top surface of the boss and the docking joint (2), so that the stress concentration area generated by the radial external force at the connection between the docking joint (2) and the outer panel (101) can be better extended from the top surface of the boss to the bottom surface of the boss.

9. The camera rear housing connector according to claim 1, characterized in that: A limiting groove is formed on one side of the docking cavity close to the rear shell (1); the sleeve conductor (3) is coaxially assembled in the docking cavity and fixed by an injection-molded fixing ring (7).

10. The camera rear housing connector according to claim 9, characterized in that: The outer wall of the sleeve conductor (3) is stamped to have a first convex point (303) protruding outward and abutting against the inner wall of the fixing ring (7); a fixing groove (501) is provided around the outer wall of the insulating medium (5); and the sleeve conductor (3) is stamped to have a second convex point (304) protruding inward and fitting into the fixing groove (501) formed thereon by a stamping process.

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