Waterproof sealing joint assembly

Abstract

A waterproof sealing connector assembly comprises a wire harness, a lamp shell, a metal insert and a sealing piece, the lamp shell is provided with a tubular part and a cavity part, the cavity part is provided with a hollow containing cavity communicated with a tubular cavity of the tubular part, the sealing piece, the metal insert and the lamp shell are integrally formed, and a through hole is formed in the center of the sealing piece so that the wire harness can penetrate through the through hole to be connected with other components. The main body part of the metal insert is tubular, so that the first end of the wire harness penetrates through the metal insert, enters the through hole and the tube cavity, reaches the accommodating cavity and can be connected with the light source module, and the second end of the wire harness is connected with a control circuit or a power supply. The sealing piece, the metal insert and the lamp shell are integrally formed, so that the overall sealing performance of the lamp is greatly improved, the traditional mode that rubber pieces on the two sides are connected through a metal ring buckle is avoided, the problem that the sealing performance is reduced due to rusting and corrosion of the metal ring buckle is effectively solved, and therefore the stability and reliability of connection between the wiring harness and the lamp shell are improved.

Description

Technical Field

[0001] The utility model belongs to the field of vehicle wiring harnesses, and in particular relates to a waterproof sealing joint component. Background Art

[0002] Automotive lighting technology is an important guarantee for safe driving of vehicles, and the design and manufacture of headlights are crucial. Headlights are mainly composed of light source modules, wiring harnesses and lamp housings. The light source module is connected to the external power supply through the wiring harness, and the lamp housing is used to protect the light source module and ensure its lighting signal function. However, since the wiring harness needs to pass through the lamp housing, it is necessary to have good sealing between the lamp housing and the wiring harness to prevent the intrusion of liquids such as rainwater, which may cause the light source module to fail.

[0003] In the existing technology, metal buckles are usually used to connect the rubber parts on both sides to achieve the connection between the wiring harness and the lamp housing. Although this method is simple, after long-term use, the metal buckles are prone to rust and corrosion, resulting in reduced sealing, which leads to the intrusion of liquids such as rainwater, causing the light source module to fail.

[0004] Prior art Chinese patent CN202220815698.2, entitled “LED lamp with waterproof function”, discloses a LED lamp with waterproof function, which adopts the scheme of filling sealant in the perforation to seal the gap between the metal wire and the insulating layer, thereby improving the waterproof performance of the LED lamp. One end of the metal wire is exposed to the sealant, and the gap is sealed by partial exposure. The lamp is provided with an insulating barrier to further improve the waterproof effect of the LED lamp, but the design requires the provision of multiple sealing structures, such as using a waterproof joint to seal the gap between the joint and the lamp housing, and then using sealant to achieve the sealing between the wiring harness and the joint. This not only has a complex manufacturing process and high cost, but also failure of the seal at any position will lead to the intrusion of liquids such as rainwater, causing the light source module to fail. Utility Model Content

[0005] In view of the above-mentioned prior art, the purpose of the utility model is to provide a waterproof sealing joint assembly with higher reliability.

[0006] The technical solution of the utility model is achieved as follows: a waterproof sealing joint assembly includes a wiring harness, a lamp housing, a metal insert and a sealing member, the lamp housing is provided with a tubular portion and a cavity portion, the cavity portion has a hollow accommodating cavity connected to the tubular cavity of the tubular portion, the sealing member is integrally formed with the metal insert and the lamp housing, a through hole is provided at the center of the sealing member so that the wiring harness can pass through the through hole to be connected to other components, the main body of the metal insert is tubular so that the first end of the wiring harness passes through the metal insert into the through hole and the tubular cavity to reach the accommodating cavity to be connected to the light source module, and the second end of the wiring harness is connected to the control circuit or power supply.

[0007] The beneficial effect of this design is that the integral molding of the seal, metal insert and lamp housing greatly improves the overall sealing performance of the lamp, avoids the traditional method of using metal buckles to connect the rubber parts on both sides, and effectively prevents the problem of reduced sealing caused by rust and corrosion of the metal buckles, thereby improving the stability and reliability of the connection between the wiring harness and the lamp housing.

[0008] Furthermore, the metal insert includes a metal part and a plastic part. The metal part protrudes relative to the plastic part in a ring shape and is arranged around the outside of the plastic part. The metal part is made of metal material with a high melting point and will not deform during hot pressing, injection molding and glue injection molding. The protruding arrangement of the metal part relative to the plastic part can be more firmly fixed to the seal. Multiple metal parts can be arranged outside the plastic part to form multiple circles. The metal parts are spaced a certain distance apart so that the local protruding structure of the seal can be staggered with the metal part to form a tighter seal.

[0009] Furthermore, the metal part is provided with a flat portion so that the metal part has a non-rotating structure. Since the seal is generally made of silicone rubber material which is relatively soft, if a rotating structure is adopted, it is easy for the seal to rotate relative to the metal insert. If it is designed as a non-rotating structure, the possibility of the seal rotating relative to the metal insert is greatly reduced.

[0010] Furthermore, the seal is provided with an inner tube portion, which is located in the tube cavity. The seal is generally made of rubber material which is relatively soft. This design allows the tubular portion to be wrapped around the outer portion of the inner tube portion to achieve a better sealing effect.

[0011] Furthermore, the seal is provided with an outer tube portion, which is wrapped around the outside of the tubular portion. This design completely interlaces the seal and the tubular portion, greatly increasing the contact area between the seal and the tubular portion, making the connection more stable and the seal more reliable.

[0012] Furthermore, the tubular portion is provided with a plurality of radially extending connecting holes, and the outer tube portion and the inner tube portion can be connected through the connecting holes, so that the outer tube portion and the inner tube portion can form an integral structure and be more firmly fixed to the tubular portion to form a more stable sealing structure.

[0013] Furthermore, the tubular portion includes a first tube portion and a second tube portion, the outer diameter of the first tube portion is smaller than the outer diameter of the second tube portion, the second tube portion and the first tube portion form a step surface, the step surface is connected to the seal, and a first annular groove is provided at the connection position between the seal and the step surface. Since the material of the seal is relatively soft and easy to deform, the first annular groove can reduce the concentrated stress between the lamp housing and the surface of the seal, expand the deformation of the seal and disperse the stress to other positions, so that the contact between the seal and the lamp housing is more stable.

[0014] Furthermore, the seal includes a large end and a small end, the outer diameter of the large end is greater than or equal to the outer diameter of the small end, and a transition groove is provided between the large end and the small end. This design has better mechanical properties and avoids stress concentration on the seal surface.

[0015] Furthermore, a plurality of circumferentially extending semicircular annular grooves are provided on the outer side of the seal, so that the seal has better elasticity and can produce a larger deformation amount.

[0016] Furthermore, a connector is provided at the second end of the wiring harness and can be plugged into other connectors or sockets. This design facilitates the connection of the wiring harness with other power supplies or control circuits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional schematic diagram of the assembly of a waterproof sealing joint component of the utility model;

[0018] Figure 2 This is a disassembled three-dimensional schematic diagram of a waterproof sealing joint assembly of the utility model;

[0019] Figure 3 This is a top view schematic diagram of a waterproof sealing joint assembly of the utility model;

[0020] Figure 4 for Figure 3 Schematic cross-sectional view in the AA direction;

[0021] Figure 5 for Figure 3 Schematic diagram of the cross-section along the BB direction. DETAILED DESCRIPTION

[0022] As required, detailed embodiments of the present invention are disclosed herein, but it should be understood that the disclosed embodiments are only exemplary of the present invention, and the present invention may be implemented in different and alternative forms. The drawings are not necessarily drawn to scale, and certain features may be exaggerated or reduced to show the details of specific components. Therefore, the specific structural and functional details disclosed herein should not be understood as having a limiting meaning, but only as a representative basis to teach those skilled in the art to adopt the present invention differently. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, a waterproof sealing joint assembly includes a wiring harness 1, a lamp housing 2, a metal insert 3 and a seal 4. The lamp housing 2 is provided with a tubular portion 21 and a cavity portion 22. The cavity portion 22 has a hollow accommodating cavity 23 which is connected to the cavity 24 of the tubular portion 21. The seal 4 is integrally formed with the metal insert 3 and the lamp housing 2. A through hole 40 is provided at the center of the seal 4 so that the wiring harness 1 can pass through the through hole 40 to be connected to other components. The main body of the metal insert 3 is tubular so that the first end of the wiring harness 1 passes through the metal insert 3 into the through hole 40 and the cavity 24 to reach the accommodating cavity 23 to be connected to the light source module. The second end of the wiring harness 1 is connected to the control circuit or the power supply.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the metal insert 3 includes a metal part 31 and a plastic part 32. The metal part 31 protrudes relative to the plastic part 32 in an annular shape and is arranged around the outside of the plastic part 32. To ensure the sealing performance, three annular metal parts 31 can be provided.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the metal part 31 is provided with a flat part 33 so that the metal part 31 is a non-rotating structure, so that the sealing member 4 can also be configured as a flat ellipse or other non-rotating structures.

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the sealing member 4 is provided with an inner tube portion 41 , and the inner tube portion 41 is located in the tube cavity 24 .

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the sealing member 4 is provided with an outer tube portion 42 , and the outer tube portion 42 is wrapped around the outside of the tubular portion 21 .

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the tubular portion 21 is provided with a plurality of communicating holes 25 extending radially, and the outer tube portion 42 and the inner tube portion 41 can be connected via the communicating holes 25 .

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the tubular portion 21 includes a first tube portion 26 and a second tube portion 27. The outer diameter of the first tube portion 26 is smaller than the outer diameter of the second tube portion 27. The second tube portion 27 and the first tube portion 26 form a step surface 28. The step surface 28 is connected to the seal 4. A first annular groove 43 is provided at the connection position between the seal 4 and the step surface 28.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the seal 4 includes a large end 44 and a small end 45 , the outer diameter of the large end 44 is greater than or equal to the outer diameter of the small end 45 , and a transition groove 46 is provided between the large end 44 and the small end 45 .

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a plurality of circumferentially extending semicircular annular grooves 47 are provided on the outer side of the sealing member 4 .

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the second end of the wiring harness 1 is provided with a connector 5 which can be plugged with other connectors or sockets.

[0033] The lamp housing 2 can be made of PMMA, PC or ABS. In order to reduce the cost, hot pressing can be used. The mold is heated to 200°C, the pressure is increased to 5MPa, and the holding time is about 10 minutes. The plastic part 32 of the metal insert 3 can be made of similar materials, and the metal part 31 is made of stainless steel. The metal part 31 is placed in the mold and heated to 200°C, the pressure is increased to 5MPa, and the holding time is about 10 minutes. The sealing part 4 is made of silicone rubber. The lamp housing 2 and the metal insert 3 are respectively formed and placed in the sealing part. In the mold of the component 4, the through hole 40 of the seal 4 needs to be formed by a side core pulling method, and the side core pulling can be set on one side of the metal insert 3. By hot pressing, the mold temperature of the seal 4 is heated to 150°C, the pressure is pressurized to 3MPa, and the holding time is about 5 minutes; after the metal insert 3, the lamp housing 2 and the seal 4 are integrally formed, the wiring harness 1 passes through the through hole 40 of the seal 4 to the accommodating cavity 23 of the lamp housing 2, and a waterproof sealing joint 5 assembly is assembled, and then the light source module is connected to use in the field of vehicle lighting.

Claims

1. A waterproof sealing joint (5) assembly, comprising a wiring harness (1), a lamp housing (2), a metal insert (3) and a sealing member (4), wherein the lamp housing (2) is provided with a tubular portion (21) and a cavity portion (22), wherein the cavity portion (22) has a hollow accommodating cavity (23) communicating with the cavity (24) of the tubular portion (21), characterized in that: The sealing member (4) is integrally formed with the metal insert (3) and the lamp housing (2); a through hole (40) is provided at the center of the sealing member (4) so ​​that the wiring harness (1) can pass through the through hole (40) to be connected to other components; the main body of the metal insert (3) is tubular so that a first end of the wiring harness (1) passes through the metal insert (3) into the through hole (40) and the tubular cavity (24) to reach the accommodating cavity (23) to be connected to the light source module; and a second end of the wiring harness (1) is connected to a control circuit or a power source.

2. The waterproof sealing joint assembly according to claim 1, characterized in that: The metal insert (3) comprises a metal part (31) and a plastic part (32); the metal part (31) protrudes relative to the plastic part (32) in a ring shape and is arranged around the outside of the plastic part (32).

3. The waterproof sealing joint assembly according to claim 2, characterized in that: The metal part (31) is provided with a flat part (33) so that the metal part (31) is a non-rotating structure.

4. The waterproof sealing joint assembly according to any one of claims 1 to 3, characterized in that: The sealing member (4) is provided with an inner tube portion (41), and the inner tube portion (41) is located in the tube cavity (24).

5. The waterproof sealing joint assembly according to claim 4, characterized in that: The sealing member (4) is provided with an outer tube portion (42), and the outer tube portion (42) is wrapped around the outside of the tubular portion (21).

6. The waterproof sealing joint assembly according to claim 5, characterized in that: The tubular portion (21) is provided with a plurality of communicating holes (25) extending radially, and the outer tubular portion (42) and the inner tubular portion (41) can be connected via the communicating holes (25).

7. The waterproof sealing joint assembly according to any one of claims 1 to 3, characterized in that: The tubular portion (21) comprises a first tubular portion (26) and a second tubular portion (27); the outer diameter of the first tubular portion (26) is smaller than the outer diameter of the second tubular portion (27); the second tubular portion (27) and the first tubular portion (26) form a stepped surface (28); the stepped surface (28) is connected to the sealing member (4); and a first annular groove (43) is provided at a connection position between the sealing member (4) and the stepped surface (28).

8. The waterproof sealing joint assembly according to claim 7, characterized in that: The sealing element (4) comprises a large end (44) and a small end (45); the outer diameter of the large end (44) is greater than or equal to the outer diameter of the small end (45); and a transition groove (46) is provided between the large end (44) and the small end (45).

9. The waterproof sealing joint assembly according to claim 8, characterized in that: The outer side of the sealing element (4) is provided with a plurality of circumferentially extending semicircular annular grooves (47).

10. The waterproof sealing joint assembly according to claim 1, 2, 3, 6 or 9, characterized in that: The second end of the wiring harness (1) is provided with a connector (5) which can be plugged into other connectors or sockets.

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