A small breaking fuse

Abstract

The utility model relates to the field of fuse, relate to a small breaking fuse, the utility model discloses: fuse tube, fuse and two groups of electric contact, the fuse includes fuse and two groups of electric block, the fuse is welded in the inside of electric block, the electric contact includes terminal and fixed cap, the terminal is fixed in the outside of fixed cover, the fixed cap is covered in the end of fuse tube, the fixed cover inside fixedly has the connecting block, be equipped with the slot in the connecting block, the electric block is inserted in the slot, in the assembly, the electric block in the fuse assembly is directly inserted into the slot of connecting block, can realize the connection of fuse and electric contact, and then complete the assembly of whole fuse, the originally complicated field welding connection changes into simple plug -in connection, simplifies the assembly flow, improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of fuses, and specifically to a small breaking capacity fuse. Background Technology

[0002] In traditional small-breaking-capacity fuses, the two ends of the fusible element are typically welded to the two contacts. This connection method requires on-site welding during assembly, which not only demands a high level of skill from the operators but is also cumbersome and time-consuming, significantly reducing assembly efficiency. Therefore, a new structural design is urgently needed to address the low efficiency problem in the assembly process of existing fuses. Utility Model Content

[0003] This invention provides a small-fraction fuse to address the problems of existing technologies.

[0004] The objective of this utility model can be achieved through the following technical solution: A small-breaking-cap fuse includes: a fuse tube, a fuse body, and two sets of conductive contacts. The fuse body includes a fuse wire and two sets of conductive blocks. The fuse wire is welded to the inner side of the conductive blocks. The conductive contacts include terminals and fixing caps. The terminals are fixed to the outer side of the fixing sleeve. The fixing caps are sleeved on the end of the fuse tube. A connecting block is fixed inside the fixing sleeve. A slot is provided in the connecting block. The conductive blocks are inserted into the slot.

[0005] In a further improvement, the conductive block and the slot have a dovetail-shaped cross-section, the slot width decreases along the center of the molten tube, the slot has an opening on one side, and the other side of the slot does not penetrate the end of the connecting block.

[0006] In a further improvement, the slot has a protrusion on its inner side, and the conductive block has a groove on its inner side that matches the protrusion.

[0007] In a further improvement, the outer sides of both sides of the melting tube are provided with annular protrusions, and the inner side of the fixing cap is provided with annular grooves that match the annular protrusions.

[0008] Compared with the prior art, the advantages of this utility model's small-breaking-capacity fuse are:

[0009] The fuse is designed as a combination of a fuse wire and a conductive block. The fuse wire is pre-welded to the inside of the conductive block to form an integral assembly. The conductive contact includes a terminal and a fixing cap. The terminal is used to connect to an external circuit, and the fixing cap is fitted onto the end of the fuse tube. The connecting block inside the fixing cap has a slot. During assembly, the conductive block in the fuse assembly is directly inserted into the slot of the connecting block to connect the fuse and the conductive contact, thereby completing the assembly of the entire fuse. This transforms the originally complex field welding connection into a simple plug-in connection, simplifying the assembly process and improving production efficiency. Attached Figure Description

[0010] Figure 1 This is a structural schematic diagram of the present invention.

[0011] Figure 2 This is a schematic diagram of the structure of the fusible tube and conductive contact in this utility model.

[0012] Figure 3 This is a schematic diagram of the connecting block in this utility model.

[0013] Figure 4 This is a structural schematic diagram of the connecting block from another perspective in this utility model.

[0014] Figure 5 This is a schematic diagram of the conductive block in this utility model.

[0015] In the figure, 1-fuse tube, 11-annular protrusion, 2-fuse body, 21-fuse wire, 22-conductive block, 23-groove, 3-conductive contact, 31-terminal, 32-fixing cap, 321-annular groove, 33-connecting block, 34-slot, 35-protrusion. Detailed Implementation

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; unless otherwise expressly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, they can refer to fixed connections or detachable connections, etc. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0017] The following is a description of the embodiments and appendices. Figures 1-5 The technical solution of this utility model will be further described below.

[0018] Example 1

[0019] A small-breaking-cap fuse includes: a fuse tube 1, a fuse element 2, and two sets of conductive contacts 3. The fuse element 2 includes a fuse wire 21 and two sets of conductive blocks 22. The fuse wire 21 is welded to the inner side of the conductive blocks 22. The conductive contacts 3 include terminals 31 and fixing caps 32. The terminals 31 are fixed to the outer side of the fixing sleeve 32. The fixing caps 32 are sleeved on the end of the fuse tube 1. A connecting block 33 is fixed inside the fixing sleeve 32. The connecting block 33 has a slot 34, and the conductive blocks 22 are inserted into the slot 34.

[0020] like Figures 1-5 As shown, the fuse element is designed as a combination structure of a fuse wire and a conductive block. The fuse wire is pre-welded to the inside of the conductive block to form a single assembly. The conductive contact includes a terminal and a retaining cap. The terminal is used to connect to an external circuit, and the retaining cap is fitted onto the end of the fuse tube. The connecting block inside the retaining cap has a slot. During assembly, the conductive block in the fuse element assembly is directly inserted into the slot of the connecting block to connect the fuse element and the conductive contact, thus completing the assembly of the entire fuse. This design transforms the originally complex field welding connection into a simple plug-in connection, simplifying the assembly process and improving production efficiency.

[0021] As a further preferred embodiment, the conductive block 22 and the slot 34 have dovetail-shaped cross-sections. The width of the slot 34 decreases along the center of the fuse tube 1. The slot 34 is open on one side, and the other side does not penetrate the end of the connecting block 33. The dovetail-shaped conductive block and slot, utilizing the "wider at the top and narrower at the bottom" shape of the dovetail groove, create a wedge-shaped locking effect when the conductive block is inserted into the slot, as the slot width decreases along the center of the fuse tube. Because one side of the slot is open and the other side is not through, the conductive block cannot be removed from the non-open side after insertion, thus achieving a secure connection between the conductive block and the slot. This structural design utilizes the mechanical wedge locking principle to ensure that the conductive block will not easily loosen or come out of the slot. It effectively prevents the conductive block from loosening or shifting due to vibration, electrodynamics, or other factors during fuse operation, ensuring a stable electrical connection between the fuse element and the conductive contact.

[0022] As a further preferred embodiment, the slot 34 has a protrusion 35 on its inner side, and the conductive block 22 has a groove 23 on its inner side that matches the protrusion 35. When the conductive block is inserted into the slot, the protrusion on the inner side of the slot will fit into the groove on the inner side of the conductive block, forming a tenon-and-mortise-like fit. This fit between the protrusion and the groove increases the contact area and friction between the conductive block and the slot, and also plays a role in accurately positioning and limiting the position of the conductive block in the slot, ensuring that the conductive block will not move laterally in the slot, and ensuring that the electrical connection between the molten metal and the conductive contact is in the optimal state.

[0023] As a further preferred embodiment, the outer sides of both sides of the fuse tube 1 are provided with annular protrusions 11, and the inner side of the fixing cap 32 is provided with annular grooves 321 that match the annular protrusions 11. When installing the fixing cap of the conductive contact, the annular groove on the inner side of the fixing cap is aligned with the annular protrusions on both sides of the fuse tube, and then the fixing cap is put on the end of the fuse tube. After the annular protrusion is embedded in the annular groove, a tight fit structure is formed, similar to a snap-fit ​​connection. This structure achieves a reliable connection between the fixing cap and the fuse tube through the mutual interlocking between the annular protrusion and the groove, protecting the fusible element and the conductive contact from the influence of external environmental factors and extending the service life of the fuse.

[0024] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A small breaking capacity fuse, characterized in that, include: The device comprises a fusible tube, a fusible body, and two sets of conductive contacts. The fusible body includes a fusible wire and two sets of conductive blocks. The fusible wire is welded to the inner side of the conductive blocks. The conductive contacts include terminals and fixing caps. The terminals are fixed to the outer side of a fixing sleeve. The fixing caps are fitted onto the end of the fusible tube. A connecting block is fixed inside the fixing sleeve. The connecting block has a slot, and the conductive blocks are inserted into the slot.

2. A small-breaking-capacity fuse according to claim 1, characterized in that, The conductive block and the slot have a dovetail-shaped cross-section. The width of the slot decreases along the center of the molten tube. The slot has an opening on one side and does not extend through the end of the connecting block on the other side.

3. A small-breaking-capacity fuse according to claim 1, characterized in that, The slot has a protrusion on its inner side, and the conductive block has a groove on its inner side that matches the protrusion.

4. A small-breaking-capacity fuse according to claim 1, characterized in that, The outer sides of the two sides of the fusion tube are provided with annular protrusions, and the inner side of the fixing cap is provided with annular grooves that match the annular protrusions.

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