Electric waterproof fuse box for automobile wire harness

Abstract

The utility model discloses an automobile wire harness electrical waterproof fuse box, which comprises a box body, the center of the bottom of the box body is fixedly connected with an interface seat, the other side of the bottom of the box body is fixedly connected with a connecting seat, the two sides of the interface seat are respectively provided with a movable groove close to the top, and one side of each movable groove is slidably connected with a movable block. According to the electrical waterproof fuse box for the automobile wire harness, the waterproof protection layer is arranged on the outer surface of the box body, the protection layer is composed of the waterproof film layer made of the macromolecule waterproof material and the polyurethane sealant layer, a double-layer waterproof barrier is formed, and the waterproof film layer is located on the outermost side and directly resists invasion of external moisture; and the polyurethane sealant layer provides secondary sealing protection, so that the water resistance and penetration resistance of the box body are remarkably improved, water is effectively prevented from permeating into the box body through the surface of the box body, and the problem of insufficient waterproof performance caused by easy failure of a single sealing element of a traditional fuse box is solved.

Description

Technical Field

[0001] This utility model relates to the field of fuse box technology, specifically to a waterproof fuse box for automotive wiring harnesses. Background Technology

[0002] In the modern automotive industry, the automotive wiring harness electrical system, as a core component for vehicle electrical signal transmission and power distribution, directly affects the overall performance and safety of the vehicle. Among these components, the fuse box, as a crucial protective device in the automotive electrical system, is responsible for automatically cutting off current in the event of circuit overload or short circuit, preventing damage to electrical components and ensuring the safe operation of the vehicle's electrical system. However, with the increasingly complex and variable operating environments of automobiles, especially the demands of applications under extreme conditions such as humidity, rain, and even underwater operations, the waterproof performance of automotive wiring harness fuse boxes has become a key factor limiting their reliability and service life.

[0003] Existing fuse box sealing designs often rely on single sealing elements, such as O-rings or flat gaskets. These sealing elements are prone to failure due to aging, wear, or improper installation during long-term use, thus affecting waterproof performance. The connection interface between the fuse box and the external wiring harness is a weak point in waterproof design. In existing designs, the sealing at the interface often relies on simple plug-in mating or additional sealing sleeves. These measures are insufficient to cope with complex and changing external environments, easily leading to moisture infiltration and causing electrical faults. Utility Model Content

[0004] The purpose of this utility model is to provide a waterproof fuse box for automotive wiring harnesses, addressing the issue that existing fuse box sealing designs often rely on single sealing elements, such as O-rings or flat gaskets. These sealing elements are prone to aging, wear, or improper installation during long-term use, leading to sealing failure and affecting waterproof performance. The connection interface between the fuse box and the external wiring harness is a weak point in waterproof design. In existing designs, the sealing at the interface often relies on simple plug-in mating or additional sealing sleeves. These measures are insufficient to cope with complex and changing external environments, easily leading to moisture infiltration and causing electrical faults.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waterproof fuse box for automotive wiring harnesses, comprising a box body, an interface seat fixedly connected to the center of the bottom of the box body, a connecting seat fixedly connected to the other side of the bottom of the box body, movable grooves being provided on the top positions of both sides of the interface seat, a movable block being slidably connected to one side of the movable groove, and arc-shaped limiting blocks being fixedly connected to the opposite sides of the two movable blocks on the left and right, an outer sealing strip being fixedly connected to the bottom position of the outer side of the interface seat, and a waterproof protective layer being fixedly connected to the outer surface of the box body, the waterproof protective layer comprising a waterproof membrane layer and a sealant layer, the waterproof membrane layer being located outside the sealant layer.

[0006] Compared with the prior art, the beneficial effects of this utility model are:

[0007] This automotive wiring harness electrical waterproof fuse box features a double-layer waterproof barrier formed by an outer waterproof protective layer composed of a waterproof membrane made of high-polymer waterproof material and a polyurethane sealant layer. The outermost waterproof membrane directly resists external moisture intrusion, while the polyurethane sealant layer provides secondary sealing protection, significantly improving the box's water resistance and impermeability. This effectively prevents moisture from seeping into the interior through the box surface, solving the problem of insufficient waterproof performance caused by the easy failure of a single seal in traditional fuse boxes. An external sealing strip is installed at the bottom of the interface seat to form an initial seal when it mates with external wiring harnesses or equipment. Simultaneously, movable blocks slidingly connected within the movable slots on both sides of the interface seat match the arc-shaped limiting slots of external connectors via arc-shaped limiting blocks, achieving both mechanical limiting and sealing functions. The movable blocks can adaptively adjust their position under the action of a damping rod and a return spring, ensuring a tight fit at the interface and preventing seal failure due to vibration or installation errors. To address the issue of water leakage caused by simple plug-in connections in traditional interfaces, an inner sealing strip is installed on the top of the inner wall of the connector, forming the first sealing barrier when inserted with external connectors. Arc-shaped limiting grooves on both sides of the bottom of the inner wall cooperate with the arc-shaped limiting blocks of the connector to form a second mechanical seal. This double-layer sealing design ensures the waterproof reliability of the connector when connected to external wiring harnesses or equipment, effectively preventing moisture penetration even in high humidity or splashing environments. It overcomes the shortcomings of traditional connectors with their single sealing method and susceptibility to aging. Both the polymer waterproof membrane layer and the polyurethane sealant layer have excellent weather resistance, chemical corrosion resistance, and aging resistance, maintaining stable waterproof performance over long-term use and reducing the frequency of maintenance and replacement due to seal failure. Simultaneously, the elastic design of the damping rod and return spring allows the arc-shaped limiting blocks to self-adjust, reducing the risk of seal failure due to improper installation or vibration, thereby extending the overall service life of the fuse box and reducing user maintenance costs. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model;

[0009] Figure 2 This utility model Figure 1 A magnified view of part A in the diagram;

[0010] Figure 3 This is a partial structural cross-sectional view of the box body of this utility model;

[0011] Figure 4 This is a cross-sectional view of the box body of this utility model;

[0012] Figure 5 This is a cross-sectional view of the waterproof protective layer of this utility model.

[0013] In the diagram: 1. Box body; 2. Interface seat; 3. Connecting seat; 4. Inner sealing strip; 5. Arc-shaped limiting groove; 6. Outer sealing strip; 7. Movable groove; 8. Movable block; 9. Arc-shaped limiting block; 10. Damping rod; 11. Return spring; 12. Inner sealing ring; 13. Waterproof protective layer; 14. Waterproof membrane layer; 15. Sealing adhesive layer. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1-5 This utility model provides a technical solution: a waterproof fuse box for automotive wiring harnesses, including a box body 1. An interface seat 2 is fixedly connected to the center of the bottom of the box body 1, and a connecting seat 3 is fixedly connected to the other side of the bottom of the box body 1. Movable grooves 7 are provided on the top positions of both sides of the interface seat 2. Movable blocks 8 are slidably connected to one side of the movable grooves 7. Arc-shaped limiting blocks 9 are fixedly connected to the opposite sides of the two movable blocks 8 on the left and right. An outer sealing strip 6 is fixedly connected to the bottom position of the outer side of the interface seat 2. A waterproof protective layer 13 is fixedly connected to the outer surface of the box body 1. The waterproof protective layer 13 includes a waterproof membrane layer 14 and a sealant layer 15. The waterproof membrane layer 14 is located outside the sealant layer 15.

[0016] An inner sealing strip 4 is fixedly connected to the top position of the inner wall of the connecting seat 3.

[0017] Arc-shaped limiting grooves 5 are provided on both sides of the bottom of the connecting seat 3, and the arc-shaped limiting grooves 5 match the arc-shaped limiting blocks 9.

[0018] Damping rods 10 are fixedly connected to the opposite sides of the two movable blocks 8, and the side of the damping rod 10 away from the movable block 8 is fixedly connected to the side inside the movable groove 7.

[0019] A return spring 11 is sleeved on the surface of the damping rod 10, and the two sides of the return spring 11 are fixedly connected to the inner walls of the movable block 8 and the movable groove 7, respectively.

[0020] The waterproof membrane layer 14 is made of polymer waterproof material, and the sealant layer 15 is made of polyurethane.

[0021] Inner sealing rings 12 are fixedly connected to both sides inside the box 1.

[0022] In summary, this automotive wiring harness waterproof fuse box, by setting a waterproof protective layer 13 on the outer surface of the box body 1, forms a double-layer waterproof barrier composed of a waterproof membrane layer 14 made of polymer waterproof material and a polyurethane sealant layer 15. The waterproof membrane layer 14 is located on the outermost side, directly resisting the intrusion of external moisture, while the polyurethane sealant layer 15 provides secondary sealing protection, significantly improving the water resistance and impermeability of the box body 1, effectively preventing moisture from seeping into the interior through the box surface, and solving the problem of insufficient waterproof performance caused by the easy failure of a single seal in traditional fuse boxes. An external sealing strip 6 is set on the bottom of the outer side of the interface seat 2, forming an initial seal when it is used with external wiring harnesses or equipment. At the same time, the movable blocks 8 slidably connected in the movable grooves 7 on both sides of the interface seat 2 match the arc-shaped limiting blocks 9 with the arc-shaped limiting grooves 5 of the external connectors, realizing the dual functions of mechanical limiting and sealing. The movable blocks 8 can adaptively adjust their position under the action of the damping rod 10 and the return spring 11 to ensure that the interface always maintains a tight fit, avoiding damage caused by vibration or installation errors. The design addresses the issue of water leakage caused by simple plug-in connections in traditional interfaces. An inner sealing strip 4 is installed at the top of the inner wall of the connector 3, forming the first sealing barrier when inserted with external connectors. Arc-shaped limiting grooves 5 on both sides of the bottom of the inner wall cooperate with the arc-shaped limiting blocks 9 of the connector 2 to form a second mechanical seal. This double-layer sealing design ensures the waterproof reliability of the connector 3 when connected to external wiring harnesses or equipment, effectively preventing water infiltration even in high humidity or splashing environments. It overcomes the shortcomings of traditional connectors with their single sealing method and susceptibility to aging. Both the polymer waterproof membrane layer 14 and the polyurethane sealant layer 15 possess excellent weather resistance, chemical corrosion resistance, and anti-aging properties, maintaining stable waterproof performance over long-term use and reducing the frequency of maintenance and replacement due to seal failure. Simultaneously, the elastic design of the damping rod 10 and the return spring 11 allows the arc-shaped limiting block 9 to self-adjust, reducing the risk of seal failure due to improper installation or vibration, thereby extending the overall service life of the fuse box and reducing user maintenance costs.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waterproof electrical fuse box for automotive wiring harnesses, comprising a box body (1), characterized in that: An interface seat (2) is fixedly connected to the center of the bottom of the box (1). A connecting seat (3) is fixedly connected to the other side of the bottom of the box (1). Movable grooves (7) are provided on the top side of both sides of the interface seat (2). Movable blocks (8) are slidably connected to one side of the movable groove (7). Arc-shaped limiting blocks (9) are fixedly connected to the opposite side of the two movable blocks (8) on the left and right. An outer sealing strip (6) is fixedly connected to the bottom side of the outer side of the interface seat (2). A waterproof protective layer (13) is fixedly connected to the outer surface of the box (1). The waterproof protective layer (13) includes a waterproof membrane layer (14) and a sealant layer (15). The waterproof membrane layer (14) is located outside the sealant layer (15).

2. The automotive wiring harness waterproof fuse box according to claim 1, characterized in that: An inner sealing strip (4) is fixedly connected to the top position of the inner wall of the connecting seat (3).

3. The automotive wiring harness electrical waterproof fuse box according to claim 1, characterized in that: Arc-shaped limiting grooves (5) are provided on both sides of the bottom of the connecting seat (3), and the arc-shaped limiting grooves (5) are matched with the arc-shaped limiting blocks (9).

4. The automotive wiring harness electrical waterproof fuse box according to claim 1, characterized in that: Damping rods (10) are fixedly connected to the opposite sides of the two movable blocks (8), and the side of the damping rod (10) away from the movable block (8) is fixedly connected to the side inside the movable groove (7).

5. A waterproof electrical fuse box for automotive wiring harnesses according to claim 4, characterized in that: The surface of the damping rod (10) is fitted with a return spring (11), and the two sides of the return spring (11) are fixedly connected to the inner walls of the movable block (8) and the movable groove (7), respectively.

6. The automotive wiring harness waterproof fuse box according to claim 1, characterized in that: The waterproof membrane layer (14) is made of polymer waterproof material, and the sealant layer (15) is made of polyurethane.

7. The automotive wiring harness waterproof fuse box according to claim 1, characterized in that: Inner sealing rings (12) are fixedly connected to both sides of the box body (1).

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