Temperature thermal fuse insulating package

Abstract

This utility model relates to the field of temperature fuses, and more particularly to an insulating package for a temperature-controlled thermal fuse. It includes an upper insulating base and a lower insulating base fixed together by laser welding. Each of the mating surfaces of the upper and lower insulating bases has a fuse cavity and a terminal cavity. The terminal cavity is located on both sides of the fuse cavity, and a wire hole is provided on the side of the terminal cavity away from the fuse cavity. A fuse is disposed in the fuse cavity, and a terminal is disposed in the terminal cavity. Both ends of the fuse contact the terminal, and the terminal connects to a wire harness, which passes through the wire hole. This utility model uses laser welding technology to weld the upper and lower insulating bases and the connection point with the wire harness into a single unit, improving the insulation performance of the encapsulated temperature fuse and meeting the requirements of various application environments.

Description

Technical Field

[0001] This utility model relates to the field of temperature fuses, and more particularly to an insulating encapsulation for a temperature thermal fuse. Background Technology

[0002] Thermal cutoffs (TCOs) are important overheat protection components widely used in various electronic and electrical equipment to prevent fires or equipment damage caused by overheating. Their main application scenarios include: household appliances, electric vehicles, tools and equipment, and fire protection systems.

[0003] However, traditional industrial methods of insulation or assembly using insulating sleeves and gold fasteners, or potting methods, have very poor insulation levels and cannot meet the requirements of various harsh application environments (such as explosion protection for mining electrical equipment, preventing electric sparks from contacting the air with electricity; waterproofing and immersion for short circuits in electric vehicles). Utility Model Content

[0004] Based on the above problems, the purpose of this utility model is to provide an insulating package for a temperature-sensitive thermal fuse. This utility model adopts the following technical solution:

[0005] This utility model provides a temperature-sensitive thermal fuse insulation package, including an upper insulating base and a lower insulating base fixed together by laser welding. Each of the mating surfaces of the upper and lower insulating bases has a fuse cavity and a terminal cavity. The terminal cavity is located on both sides of the fuse cavity. A wire hole is provided on the side of the terminal cavity away from the fuse cavity. A fuse is disposed in the fuse cavity, and a terminal is disposed in the terminal cavity. Both ends of the fuse are in contact with the terminal. The terminal is connected to a wire harness, and the wire harness passes through the wire hole.

[0006] Preferably, the upper insulating seat and the lower insulating seat are fixed by a snap-fit ​​structure on the side.

[0007] Preferably, the snap-fit ​​structure includes a snap fastener disposed on the side of the upper insulating base and a snap hole disposed on the side of the lower insulating base; the snap fastener and the snap hole are inserted into each other.

[0008] Preferably, the front sides of the upper insulating seat and the lower insulating seat are fixed by two snap-fit ​​structures, and the rear sides are fixed by one of the snap-fit ​​structures.

[0009] Preferably, the upper insulating base is provided with a mounting base.

[0010] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0011] This invention utilizes laser welding technology to weld the upper and lower insulating seats and the connection points with the wire harness into one unit, improving the insulation performance of the temperature fuse after encapsulation and meeting the requirements of various application environments. The upper and lower insulating seats are pre-fixed using a snap-fit ​​structure, ensuring that the two insulating seats are always tightly attached together. This solves the problem of thermal deformation of the insulating material during laser welding and prevents insufficient insulation sealing strength caused by deformation. In addition, the outer sheath of the wire harness is made of a soft material and is forcibly filled beyond the wire hole position. Then, through laser welding, the three parts are integrated into one unit. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the insulating package of the temperature-sensitive thermal fuse of this utility model;

[0014] Figure 2 This is an exploded view of the insulating package of the temperature-sensitive thermal fuse of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the upper and lower insulating bases in contact with each other in this utility model;

[0016] Figure 4 A schematic diagram showing the snap-fit ​​structure at the front of the insulating encapsulation of the temperature-sensitive thermal fuse of this utility model.

[0017] Figure 5 A schematic diagram showing the snap-fit ​​structure at the rear of the insulating encapsulation of the temperature-sensitive thermal fuse of this utility model.

[0018] Figure 6 This is a schematic diagram of the snap-fit ​​structure of this utility model;

[0019] Figure 7 The laser welding trajectory diagram of the contact surfaces of the upper and lower insulating seats is shown (dashed line in the diagram).

[0020] Explanation of reference numerals in the attached drawings: 1. Upper insulating base; 2. Lower insulating base; 3. Mounting base; 4. Fuse cavity; 5. Terminal cavity; 6. Wire hole; 7. Fuse; 8. Terminal; 9. Wire harness; 10. Snap-fit ​​structure; 1001. Snap-fit; 1002. Snap-fit ​​hole. Detailed Implementation

[0021] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figures 1 to 3 As shown, this embodiment discloses a temperature-sensitive thermal fuse insulating package, including an upper insulating seat 1 and a lower insulating seat 2, which are fixed together by laser welding.

[0023] The upper insulating base 1 and the lower insulating base 2 are provided with a fuse cavity 4 and a terminal cavity 5 on their mating surfaces. The terminal cavity 5 is located on both sides of the fuse cavity 4. A wire hole 6 is provided on the side of the terminal cavity 5 away from the fuse cavity 4. A fuse 7 is provided in the fuse cavity 4. A terminal 8 is provided in the terminal cavity 5. The two ends of the fuse 7 are in contact with the terminal 8. The terminal 8 is connected to the wire harness 9. The wire harness 9 passes through the wire hole 6.

[0024] like Figures 4 to 6 As shown, the upper insulating seat 1 and the lower insulating seat 2 are fixed by the side snap-fit ​​structure 10. In this embodiment, the front sides of the upper insulating seat 1 and the lower insulating seat 2 are fixed by two snap-fit ​​structures 10, and the rear sides are fixed by one snap-fit ​​structure 10.

[0025] The snap-fit ​​structure 10 includes a snap fastener 1001 disposed on the side of the upper insulating base 1 and a snap hole 1002 disposed on the side of the lower insulating base 2. The snap fastener 1001 and the snap hole 1002 are inserted into each other and snap-fit ​​together.

[0026] In this embodiment, an mounting base 3 is provided on the upper insulating base 1.

[0027] The innovations of this utility model are as follows: The upper and lower insulating bases are equipped with wire harnesses, thermal fuses, and connecting terminal cavities, which realizes the fixed positioning of thermal fuses and wire harnesses, providing a reliable and consistent external environment for temperature protection, and simultaneously achieving external insulation of exposed conductive components. In addition, the insulating bases are equipped with mounting holes, making it clear and straightforward to complete the process in one step. This not only simplifies the production and processing costs but also simplifies the assembly costs, achieving a triple benefit.

[0028] like Figure 7 As shown, during processing, the upper insulating seat 1 and the lower insulating seat 2 are locked and fixed by the snap-fit ​​structure 10, so that the two overlapping planes of the upper insulating seat 1 and the lower insulating seat 2 and the wire harness connection part are always in close contact; then, the laser welding process is used to quickly weld the two overlapping planes of the upper insulating seat 1 and the lower insulating seat 2 and the wire harness connection part into an insulating whole. It not only has extremely strong insulation strength and air-isolated sealing thermal fuse, but also achieves waterproof, moisture-proof, explosion-proof (electric spark) and oxidation-proof properties in one temperature thermal fuse insulation package.

[0029] It should be noted that the outer sheath of wire harness 9 is made of a soft material and is larger than the wire hole 6. The wire hole 6 is forcibly filled, and then the wire harness 9, the upper insulating seat 1 and the lower insulating seat 2 are fused together by laser welding.

[0030] Laser welding employs a localized heating method, which perfectly avoids the risk of overheating caused by excessively high external temperatures of the fuse body, which could lead to quality defects or direct melting during the manufacturing process.

[0031] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A temperature thermal fuse insulating package characterized by: The device includes an upper insulating seat (1) and a lower insulating seat (2) fixed together by laser welding. Each of the mating surfaces of the upper insulating seat (1) and the lower insulating seat (2) is provided with a fuse cavity (4) and a terminal cavity (5). The terminal cavity (5) is located on both sides of the fuse cavity (4). The terminal cavity (5) is provided with a wire hole (6) on the side away from the fuse cavity (4). A fuse (7) is provided in the fuse cavity (4). A terminal (8) is provided in the terminal cavity (5). The two ends of the fuse (7) are in contact with the terminal (8). The terminal (8) is connected to a wire harness (9). The wire harness (9) passes through the wire hole (6).

2. The temperature-sensitive thermal fuse insulating package according to claim 1, characterized in that: The upper insulating seat (1) and the lower insulating seat (2) are fixed by a snap-fit ​​structure (10) on the side.

3. The temperature-sensitive thermal fuse insulating encapsulation according to claim 2, characterized in that: The snap-fit ​​structure (10) includes a snap-fit ​​(1001) disposed on the side of the upper insulating seat (1) and a snap-fit ​​hole (1002) disposed on the side of the lower insulating seat (2); the snap-fit ​​(1001) and the snap-fit ​​hole (1002) are inserted into each other.

4. The temperature-sensitive thermal fuse insulating encapsulation according to claim 2, characterized in that: The front sides of the upper insulating seat (1) and the lower insulating seat (2) are fixed by two snap-fit ​​structures (10), and the rear sides are fixed by one of the snap-fit ​​structures (10).

5. The temperature-sensitive thermal fuse insulating encapsulation according to claim 1, characterized in that: The upper insulating base (1) is provided with a mounting base (3).

Images