Consistent resistance fuse

Abstract

The utility model belongs to the technical field of fuses, and particularly relates to a consistent resistance fuse. The fuse comprises a fuse, a ceramic tube, a first inner cap and a second inner cap, a first wire hole and a second wire hole are respectively formed in the middle parts of the first inner cap and the second inner cap; and two ends of the fuse wire are respectively arranged in the first wire hole and the second wire hole and are fixed through welding. According to the consistent resistance fuse, the inner cap is arranged in the fuse, the wire holes are formed in the inner cap, the alloy fuse can penetrate through and be contained in the wire holes in the two ends in the welding process, then welding and polishing are conducted from the outer side face of the inner cap, the effective length of the fuse can be guaranteed, and the consistency of products is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fuses, and particularly relates to a consistent resistance fuse. BACKGROUND

[0002] The resistance fuse generally comprises a fuse, a ceramic tube, two end caps and two lead wires. The two end caps are fixed at the two ends of the ceramic tube, the two lead wires are welded on the two end caps, and the fuse is assembled in the ceramic tube and electrically connected to the two end caps. The existing problem is that the electrical connection between the fuse and the end cap is established by welding and / or crimping, the welding point or the crimping point is located in the interior of the end cap, the length of the fuse is not easy to accurately control during assembly, and the consistency of the product is easily affected. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the application provides a consistent resistance fuse to solve all or part of the technical problems described in the background.

[0004] The application has the following technical ideas: two end caps are arranged in the fuse, and wire holes are arranged on the end caps, the alloy fuse is allowed to pass through and be accommodated in the two end wire holes during welding, and then the welding and polishing are performed from the outer side of the end cap, so that the effective length of the fuse is guaranteed, and the consistency of the product is improved.

[0005] The application provides the following solutions to solve the technical problems:

[0006] The consistent resistance fuse comprises a fuse, a ceramic tube, a first end cap and a second end cap. The first end cap and the second end cap are respectively provided with a first end cap accommodating cavity and a second end cap accommodating cavity. The ceramic tube is fixedly assembled in the first end cap accommodating cavity and the second end cap accommodating cavity. The fuse is arranged in the ceramic tube and electrically connected to the first end cap and the second end cap.

[0007] The two ends of the fuse are straightened and then welded and polished during welding, which can improve the welding efficiency and the welding quality, and is also beneficial to guarantee the consistency of the product.

[0008] Preferably, the consistent resistance fuse further comprises a first lead wire and a second lead wire. The first lead wire and the second lead wire are electrically connected to the first end cap and the second end cap respectively.

[0009] Preferably, the consistent resistance fuse further comprises a first lead wire and a second lead wire. The first lead wire and the second lead wire are electrically connected to the first end cap and the second end cap respectively.

[0010] As preferred, the lead is electrically connected to the corresponding end cap by welding.

[0011] As preferred, the consistent resistance fuse further comprises a packaging shell; the packaging shell is arranged on the first end cap, the second end cap and the ceramic tube, and can cover the connection parts of the first lead and the first end cap and the connection parts of the second lead and the second end cap.

[0012] As preferred, the packaging shell is an epoxy packaging shell.

[0013] As preferred, the welding points of the fuse and the first wire hole are located on the outer side of the first inner cap, and the welding points of the fuse and the second wire hole are located on the outer side of the second inner cap.

[0014] Beneficial technical effects:

[0015] The consistent resistance fuse disclosed in the present application can make the alloy fuse pass through and be accommodated in the wire holes of the inner caps during welding, and then be welded and polished from the outer side of the inner caps, which is beneficial to guarantee the effective length of the fuse and improve the consistency of the product.

[0016] The technical solutions and technical effects of the present application will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 : a perspective view of the structure of the consistent resistance fuse;

[0018] Figure 2 : Figure 1 an assembly relationship diagram of the fuse, the ceramic tube, the first inner cap and the second inner cap;

[0019] FIGURE DESCRIPTION:

[0020] 10-fuse, 20-ceramic tube, 30-first inner cap, 40-second inner cap, 50-first end cap, 60-second end cap, 70-first lead, 80-second lead, 90-packaging shell;

[0021] 310-first tube accommodating cavity, 320-first wire hole;

[0022] 410-second tube accommodating cavity, 420-second wire hole. DETAILED DESCRIPTION

[0023] Please refer to Figure 1 and Figure 2 The consistent resistance fuse disclosed in the present application comprises a fuse 10, a ceramic tube 20, a first inner cap 30, a second inner cap 40, a first end cap 50, a second end cap 60, a first lead 70, a second lead 80 and a packaging shell 90.

[0024] The first end cap 50 and the second end cap 60 are respectively provided with a first inner cap accommodating cavity and a second inner cap accommodating cavity, and the first inner cap 30 and the second inner cap 40 are respectively fixedly assembled in the first inner cap accommodating cavity and the second inner cap accommodating cavity.

[0025] The first inner cap 30 and the second inner cap 40 are respectively provided with a first tube accommodating cavity 310 and a second tube accommodating cavity 410, and the two ends of the ceramic tube 20 are respectively fixedly arranged in the first tube accommodating cavity 310 and the second tube accommodating cavity 410.

[0026] The first lead 70 and the second lead 80 are respectively electrically connected to the first end cap 50 and the second end cap 60 by welding.

[0027] The first end cap and the second end cap and the first inner cap and the second inner cap are all made of a conductor metal material, so that an electrically conductive path from the first lead 70 to the second lead 80 can be formed.

[0028] The epoxy resin package shell 90 is arranged on the first end cap 50, the second end cap 60 and the ceramic tube 20 and can cover the connection parts of the first lead 70 and the first end cap 50, the connection parts of the second lead 80 and the second end cap 60, the connection parts of the first end cap 50 and the ceramic tube 20, and the connection parts of the second end cap 60 and the ceramic tube 20.

[0029] The first inner cap 30 and the second inner cap 40 are respectively provided with a first wire hole 320 and a second wire hole 420. The two ends of the fuse 10 are respectively arranged in the first wire hole 320 and the second wire hole 420 and are fixed by welding; the welding points of the fuse 10 and the first wire hole 320 are located on the outer side surface of the first inner cap 30, and the welding points of the fuse 10 and the second wire hole 420 are located on the outer side surface of the second inner cap 40.

[0030] When welding, the two ends of the fuse are straightened and then welded and polished, which can improve the welding efficiency and the welding quality and is also beneficial to guarantee the consistency of the product. Thus, the consistent resistance fuse disclosed in the application is beneficial to guarantee the effective length of the fuse and improve the consistency of the product by arranging the inner cap in the fuse and arranging the wire hole on the inner cap.

[0031] In a variable embodiment of the application, the first inner cap accommodating cavity and the second inner cap accommodating cavity are both provided with conductive glue to guarantee the electrical connection performance between the inner cap and the end cap.

[0032] The technical scheme and the technical effects of the application are described in detail above in combination with the drawings and the specific embodiments, and it should be noted that other embodiments can be developed by those skilled in the art on the basis of the application; any simple transformation and equivalent replacement without departing from the innovative concept of the application are covered in the application and belong to the protection range of the patent.

Claims

1. A consistent resistance fuse, comprising a fuse (10), a ceramic tube (20); characterized in that: it further comprises a first inner cap (30), a second inner cap (40), the first inner cap (30) is provided with a first tube accommodating cavity (310), a first wire hole (320), the second inner cap (40) is provided with a second tube accommodating cavity (410), a second wire hole (420); the two ends of the ceramic tube (20) are respectively fixedly assembled in the first tube accommodating cavity (310) and the second tube accommodating cavity (410), and the fuse (10) is arranged in the ceramic tube (20) and is welded at two ends in the first wire hole (320) and the second wire hole (420) respectively.

2. The consistent resistance fuse according to claim 1, characterized in that: the consistent resistance fuse further comprises a first end cap (50), a second end cap (60); the first end cap (50) and the second end cap (60) are respectively provided with a first inner cap accommodating cavity and a second inner cap accommodating cavity; the first inner cap (30) and the second inner cap (40) are respectively fixedly assembled in the first inner cap accommodating cavity and the second inner cap accommodating cavity.

3. The consistent resistance fuse according to claim 2, characterized in that: the consistent resistance fuse further comprises a first lead wire (70), a second lead wire (80); the first lead wire (70) and the second lead wire (80) are electrically connected to the first end cap (50) and the second end cap (60) respectively.

4. The consistent resistance fuse according to claim 3, characterized in that: the consistent resistance fuse further comprises a packaging shell (90); the packaging shell (90) is arranged on the first end cap (50), the second end cap (60) and the ceramic tube (20), and can cover the connection parts of the first lead wire (70) and the first end cap (50) and the connection parts of the second lead wire (80) and the second end cap (60).

5. The consistent resistance fuse according to claim 1, characterized in that: the welding points of the fuse (10) and the first wire hole (320) are located on the outer side of the first inner cap (30), and the welding points of the fuse (10) and the second wire hole (420) are located on the outer side of the second inner cap (40). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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