Fuse

Abstract

The utility model belongs to the technical field of electric tool battery protection, and particularly relates to a fuse which comprises a shell, one end of the shell is sleeved with a first outer cap, the other end of the shell is sleeved with a second outer cap, the interior of the shell is hollow, a fuse wire penetrates through the interior of the shell, one end of the fuse wire is electrically connected with the first outer cap, and the other end of the fuse wire is electrically connected with the second outer cap. The other end of the fuse wire is electrically connected with the second outer cap, a fixing body is arranged at the end of the fuse wire, the end, away from the fuse wire, of the fixing body covers the surface of the first outer cap and / or the surface of the second outer cap, a first connecting piece is arranged on the surface of the first outer cap, and the end, away from the first outer cap, of the first connecting piece is embedded into the fixing body. According to the utility model, through the arrangement of the first connecting piece, the connection between the first outer cap and the fixing body is more stable, and the conductive effect between the first outer cap and the fixing body is ensured, so that the conductive effect between the fuse wire and the first outer cap is ensured, the first outer cap is not easy to separate from the shell, and the quality of the fuse is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of power tool battery protection, and in particular relates to a fuse. Background Art

[0002] The popularization of the power system has brought convenience to human life, but due to the frequent fire accidents caused by improper use of electricity, electricity safety has received special attention. Among them, fuses play a very important role in preventing electrical disasters. Their main function is to prevent excessive current from flowing through electronic circuits. The most important characteristic of a general fuse is its current carrying capacity. The maximum current carrying capacity of various fuses is set as a statistical value obtained through a series of tests for reference and selection by circuit designers. When excess current flows through the fuse, it will generate high temperature and cause it to melt, thereby protecting the circuit from damage. At the same time, it can also achieve the practical purpose of preventing electrical wires from catching fire and avoiding fires. The existing fuses have poor conductivity and the end caps are easy to loosen, resulting in a decrease in the quality of the fuse.

[0003] Therefore, it is urgent to propose a new technical solution to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a fuse in view of the deficiencies of the prior art. The first connecting piece is provided to make the connection between the first outer cap and the fixed body more stable, thereby ensuring the conductive effect between the first outer cap and the fixed body, thereby ensuring the conductive effect between the fuse and the first outer cap, and making it difficult for the first outer cap to detach from the shell, thereby improving the quality of the fuse.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A fuse comprises a shell, wherein one end of the shell is sleeved with a first outer cap, and the other end of the shell is sleeved with a second outer cap, the interior of the shell is hollow, and a fuse is passed through the interior of the shell, one end of the fuse is electrically connected to the first outer cap, and the other end of the fuse is electrically connected to the second outer cap, a fixing body is provided at the end of the fuse, and an end of the fixing body away from the fuse covers the surface of the first outer cap and / or the second outer cap, a first connecting piece is provided on the surface of the first outer cap, and an end of the first connecting piece away from the first outer cap is embedded in the fixing body.

[0007] Preferably, a second connecting piece is provided on the surface of the second outer cap, and one end of the second connecting piece away from the second outer cap is embedded in the fixing body.

[0008] Preferably, the interior of the shell is filled with arc-extinguishing material, and the arc-extinguishing material wraps the surface of the fuse.

[0009] Preferably, a recessed portion is provided on the outer side of the end portion of the shell, and a bending piece is provided on the end portion of the fuse, and a side surface of the bending piece abuts against a surface of the recessed portion.

[0010] Preferably, a first inner cap is sleeved on one end of the shell, an end of the first inner cap is concave to form a first notch, one end of the fuse passes through the first notch and is electrically connected to the first outer cap, and the fixing body is filled between the first notch and the first outer cap.

[0011] Preferably, a first fixing piece is provided on the surface of the first inner cap, and one end of the first fixing piece away from the first inner cap is embedded in the fixing body.

[0012] Preferably, a second inner cap is sleeved on the other end of the shell, the end of the second inner cap is concave to form a second notch, one end of the fuse passes through the second notch and is electrically connected to the second outer cap, and the fixing body is filled between the second notch and the second outer cap.

[0013] Preferably, a second fixing piece is provided on the surface of the second inner cap, and one end of the second fixing piece away from the second inner cap is embedded in the fixing body.

[0014] Preferably, a recessed portion is provided on the outer side of the end portion of the shell, and the side surface of the first inner cap and / or the second inner cap abuts against the surface of the recessed portion.

[0015] Preferably, the surface of the fuse has at least one through hole, and a plurality of the through holes are arranged at intervals along the surface of the fuse.

[0016] Preferably, the surface of the fuse has at least one groove, and a plurality of the grooves are arranged on the side of the fuse in a relatively staggered manner.

[0017] Preferably, a conductive layer is disposed on the surface of the first outer cap and / or the second outer cap, and the conductive layer is used to enhance the conductive effect of the first outer cap or the second outer cap.

[0018] Preferably, a protective layer is provided on the surface of the first inner cap and / or the second inner cap, and the protective layer is used to protect the first inner cap or the second inner cap.

[0019] Preferably, a first connector is provided at one end of the first connector away from the first outer cap, and the first connector is used to enhance the connection effect between the first connector and the fixing body.

[0020] Preferably, a second connector is provided at one end of the second connector away from the second outer cap, and the second connector is used to enhance the connection effect between the second connector and the fixing body.

[0021] The beneficial effects of the utility model are as follows: the utility model comprises a shell, one end of the shell is sleeved with a first outer cap, the other end of the shell is sleeved with a second outer cap, the interior of the shell is hollow, a fuse is passed through the interior of the shell, one end of the fuse is electrically connected to the first outer cap, the other end of the fuse is electrically connected to the second outer cap, a fixed body is provided at the end of the fuse, an end of the fixed body away from the fuse covers the surface of the first outer cap and / or the second outer cap, a first connecting piece is provided on the surface of the first outer cap, and an end of the first connecting piece away from the first outer cap is embedded in the fixed body. The utility model makes the connection between the first outer cap and the fixed body more stable by providing the first connecting piece, ensures the conductive effect between the first outer cap and the fixed body, thereby ensuring the conductive effect between the fuse and the first outer cap, and also makes it difficult for the first outer cap to detach from the shell, thereby improving the quality of the fuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is one of the overall structural schematic diagrams of Embodiment 1 and Embodiment 4 of the present utility model.

[0023] Figure 2 This is the second schematic diagram of the overall structure of Example 1 and Example 4 of the utility model.

[0024] Figure 3 This is a schematic diagram of the overall structure of Example 2 of the utility model.

[0025] Figure 4 This is one of the overall structural schematic diagrams of Example 3 of the utility model.

[0026] Figure 5 This is the second schematic diagram of the overall structure of Example 3 of the utility model.

[0027] Figure 6 This is a schematic diagram of the structure of the first outer cap or the second outer cap of Example 5 of the utility model.

[0028] Figure 7 This is a schematic diagram of the structure of the first inner cap or the second inner cap of Example 5 of the utility model.

[0029] Figure 8 This is a schematic diagram of the overall structure of the fuse of Example 6 of the utility model.

[0030] Fig. 9 This is a schematic diagram of the overall structure of the fuse of Example 7 of the utility model.

[0031] Among them: 1. Shell; 11. Recessed portion; 2. First outer cap; 21. First connector; 211. First connector; 22. Conductive layer; 3. Second outer cap; 31. Second connector; 311. Second connector; 4. Fuse; 41. Bend; 42. Through hole; 43. Groove; 5. Fixed body; 6. Arc extinguishing material; 7. First inner cap; 71. First notch; 72. First fixing member; 73. Protective layer; 8. Second inner cap; 81. Second notch; 82. Second fixing member. DETAILED DESCRIPTION

[0032] If certain words are used in the specification and claims to refer to specific components, those skilled in the art should understand that manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. As mentioned throughout the specification and claims, "including" is an open term and should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0033] In the utility model, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0034] The following is combined with Figures 1 to 9 The utility model is further described in detail with specific embodiments, but is not intended to limit the utility model.

[0035] Example 1

[0036] A fuse comprises a shell 1, the shell 1 is a porcelain tube, one end of the shell 1 is sleeved with a first outer cap 2, the other end of the shell 1 is sleeved with a second outer cap 3, the first outer cap 2 and the second outer cap 3 are both used to be electrically connected to an external device, the interior of the shell 1 is hollow, a fuse 4 is passed through the interior of the shell 1, the fuse 4 can be made of pure copper, copper plated with tin, copper plated with silver, silver-copper alloy plated with tin, or a variety of metal alloy composite strip processes, one end of the fuse 4 is electrically connected to the first outer cap 2, the other end of the fuse 4 is electrically connected to the second outer cap 3, and the end of the fuse 4 is provided with The fixed body 5, one end of the fixed body 5 away from the fuse 4 covers the surface of the first outer cap 2 and / or the second outer cap 3, the fixed body 5 is used to increase the contact area between the fuse 4 and the first outer cap 2 or the second outer cap 3, the fixed body 5 is solder paste, which can enhance the conductive effect between the fuse 4 and the first outer cap 2 or the second outer cap 3, and can also enhance the stability of the connection between the fuse 4 and the first outer cap 2 or the second outer cap 3. The surface of the first outer cap 2 is provided with a first connector 21, and one end of the first connector 21 away from the first outer cap 2 is embedded in the fixed body 5. By providing the first connector 21, the connection between the first outer cap 2 and the fixed body 5 is more stable, the conductive effect between the first outer cap 2 and the fixed body 5 is ensured, thereby ensuring the conductive effect between the fuse 4 and the first outer cap 2, and the first outer cap 2 is not easily separated from the housing 1, thereby improving the quality of the fuse.

[0037] In this embodiment, a second connecting piece 31 is provided on the surface of the second outer cap 3, and one end of the second connecting piece 31 away from the second outer cap 3 is embedded in the fixed body 5. By providing the second connecting piece 31, the connection between the second outer cap 3 and the fixed body 5 is more stable, the conductive effect between the second outer cap 3 and the fixed body 5 is ensured, thereby ensuring the conductive effect between the fuse 4 and the second outer cap 3, and also making it difficult for the second outer cap 3 to be separated from the housing 1, thereby improving the quality of the fuse.

[0038] In this embodiment, a first connector 211 is provided at one end of the first connector 21 away from the first outer cap 2, and the first connector 211 is used to enhance the connection effect between the first connector 21 and the fixed body 5. The overall connection structure of the first connector 211 and the first connector 21 is L-shaped, and the first connector 211 is embedded in the fixed body 5 as a protruding end, and can cooperate with the first connector 21, thereby improving the fixing effect between the first connector 21 and the fixed body 5, so that the first outer cap 2 is not easily separated from the fixed body 5.

[0039] In this embodiment, a second connector 311 is provided at one end of the second connector 31 away from the second outer cap 3, and the second connector 311 is used to enhance the connection effect between the second connector 31 and the fixed body 5. The overall connection structure of the second connector 311 and the second connector 31 is L-shaped, and the second connector 311 is embedded in the fixed body 5 as a protruding end, and can cooperate with the second connector 31, thereby improving the fixing effect between the second connector 31 and the fixed body 5, so that the second outer cap 3 is not easily separated from the fixed body 5.

[0040] Example 2

[0041] The present embodiment is different from the embodiment 1 in that the interior of the housing 1 is filled with arc extinguishing material 6, and the arc extinguishing material 6 wraps the surface of the fuse 4. By providing the arc extinguishing material 6, the arc extinguishing capability can be improved and the safety of the fuse can be improved. The arc extinguishing material 6 can be quartz sand.

[0042] The other structures of this embodiment are the same as those of Embodiment 1 and will not be described again here.

[0043] Example 3

[0044] The present embodiment is different from the first embodiment in that a recessed portion 11 is provided at the outer side of the end of the housing 1, and a bent piece 41 is provided at the end of the fuse 4, and the side surface of the bent piece 41 abuts against the surface of the recessed portion 11. By providing the bent piece 41, the fixing effect between the end of the fuse and the housing 1 can be enhanced, and the other side surface of the bent piece 41 is electrically connected to the inner side surface of the first outer cap 2 through the fixing body 5, which can enhance the conductive effect between the fuse 4 and the first outer cap 2. The fixing body 5 is provided in the recessed portion 11 and on the inner end surface of the first outer cap 2, which can increase the conductive area between the fuse 4 and the first outer cap 2.

[0045] The other structures of this embodiment are the same as those of Embodiment 1 and will not be described again here.

[0046] Example 4

[0047] The present embodiment is different from the embodiment 1 in that a first inner cap 7 is sleeved on one end of the housing 1, the outer side surface of the first inner cap 7 is electrically connected to the inner side surface of the first outer cap 2, the end of the first inner cap 7 is concave to form a first notch 71, one end of the fuse 4 passes through the first notch 71 and is electrically connected to the first outer cap 2, and a fixing body 5 is filled between the first notch 71 and the first outer cap 2. The fixing body 5 is disposed at the first notch 71, one end of the fuse 4 is electrically connected to the first inner cap 7 and the first outer cap 2 through the fixing body 5, and the first outer cap 2 is sleeved on the outer side of the first inner cap 7, thereby increasing the conductive area between the fuse 4 and the first outer cap 2.

[0048] In this embodiment, a first fixing member 72 is provided on the surface of the first inner cap 7, and one end of the first fixing member 72 away from the first inner cap 7 is embedded in the fixing body 5. The first fixing member 72 is used to enhance the binding effect of the first inner cap 7 on the fixing body 5, and the first fixing member 72 and the first outer cap 2 are arranged in parallel, so that the fixing body 5 is not easily detached from the first inner cap 7.

[0049] In this embodiment, the other end of the housing 1 is sleeved with a second inner cap 8, the outer side surface of the second inner cap 8 is electrically connected to the inner side surface of the second outer cap 3, the end of the second inner cap 8 is concave to form a second notch 81, one end of the fuse 4 passes through the second notch 81 and is electrically connected to the second outer cap 3, and a fixing body 5 is filled between the second notch 81 and the second outer cap 3, which enhances the conductive effect between the fuse 4 and the second inner cap 8 and between the fuse 4 and the second outer cap 3. The fixing body 5 is arranged at the second notch 81, one end of the fuse 4 is electrically connected to the second inner cap 8 and the second outer cap 3 through the fixing body 5, and the second outer cap 3 is sleeved on the outside of the second inner cap 8, which increases the conductive area between the fuse 4 and the second outer cap 3.

[0050] In this embodiment, a second fixing member 82 is provided on the surface of the second inner cap 8, and one end of the second fixing member 82 away from the second inner cap 8 is embedded in the fixing body 5. The second fixing member 82 is used to enhance the binding effect of the second inner cap 8 on the fixing body 5. The second fixing member 82 and the second outer cap 3 are arranged in parallel, so that the fixing body 5 is not easily detached from the second inner cap 8.

[0051] In this embodiment, a recessed portion 11 is provided on the outer side of the end of the shell 1, and the side surface of the first inner cap 7 and / or the second inner cap 8 abuts against the surface of the recessed portion 11. By providing the recessed portion 11, part of the inner side surface of the first outer cap 2 and / or the second outer cap 3 can also abut against the surface of the shell 1, thereby enhancing the stability of the connection between the first outer cap 2 and the shell 1.

[0052] The other structures of this embodiment are the same as those of Embodiment 1 and will not be described again here.

[0053] Example 5

[0054] The present embodiment is different from the embodiment 1 in that a conductive layer 22 is provided on the surface of the first outer cap 2 and / or the second outer cap 3, and the conductive layer 22 is used to enhance the conductive effect of the first outer cap 2 or the second outer cap 3. The conductive layer 22 may be silver, and the conductive layer 22 is plated on the surface of the first outer cap 2 and / or the second outer cap 3, which can effectively enhance the conductivity of the first outer cap 2 and / or the second outer cap 3, and the conductive layer 22 can also reduce the wear of the outer cap, thereby protecting the first outer cap 2 or the second outer cap 3 and improving the service life of the first outer cap 2 or the second outer cap 3.

[0055] In this embodiment, a protective layer 73 is provided on the surface of the first inner cap 7 and / or the second inner cap 8, and the protective layer 73 is used to protect the first inner cap 7 or the second inner cap 8. The protective layer 73 can be tin, and the protective layer 73 is plated on the surface of the first inner cap 7 and / or the second inner cap 8 to prevent the first inner cap 7 or the second inner cap 8 from being corroded, thereby improving the service life of the first inner cap 7 or the second inner cap 8.

[0056] The other structures of this embodiment are the same as those of Embodiment 1 and will not be described again here.

[0057] Example 6

[0058] The difference between this embodiment and the first embodiment is that the surface of the fuse 4 has at least one through hole 42, and a plurality of through holes 42 are arranged at intervals along the surface of the fuse 4. By providing the through holes 42, the voltage passing through can be divided into multiple sections, thereby achieving the purpose of voltage division, allowing the temperature of the melting point to be concentrated between a certain area, so that the discreteness of the melting time of the fuse 4 is small, the temperature rise is low, and the temperature point is more centered, effectively improving the short circuit and disconnection protection capabilities of the product.

[0059] The other structures of this embodiment are the same as those of Embodiment 1 and will not be described again here.

[0060] Example 7

[0061] The difference between this embodiment and embodiment 1 is that the surface of the fuse 4 has at least one groove 43, and multiple grooves 43 are relatively staggered on the two sides of the fuse 4. By setting the grooves 43, the voltage passing through can be divided into multiple sections, so as to achieve the purpose of voltage division, so that the temperature of the melting point is concentrated between a certain area, so that the discreteness of the melting time of the fuse 4 is small, the temperature rise is low, and the temperature point is more centered, which effectively improves the short circuit and disconnection protection capabilities of the product. The grooves 43 are relatively staggered on the sides of the fuse 4, which will not reduce the conductive effect of the fuse 4, and can be fused faster from the position of the grooves 43. Multiple grooves 43 can also be relatively symmetrically arranged on the two sides of the fuse 4. The grooves 43 are relatively symmetrically arranged on the sides of the fuse 4 to divide the fuse 4 into large sections, and the fuse 4 can be fused faster through the grooves 43.

[0062] The other structures of this embodiment are the same as those of Embodiment 1 and will not be described again here.

[0063] Obviously, the utility model includes a shell, one end of the shell is sleeved with a first outer cap, the other end of the shell is sleeved with a second outer cap, the interior of the shell is hollow, a fuse is passed through the interior of the shell, one end of the fuse is electrically connected to the first outer cap, the other end of the fuse is electrically connected to the second outer cap, a fixed body is provided at the end of the fuse, the end of the fixed body away from the fuse covers the surface of the first outer cap and / or the second outer cap, the surface of the first outer cap is provided with a first connector, and the end of the first connector away from the first outer cap is embedded in the fixed body. The utility model makes the connection between the first outer cap and the fixed body more stable by providing the first connector, ensures the conductive effect between the first outer cap and the fixed body, thereby ensuring the conductive effect between the fuse and the first outer cap, and also makes it difficult for the first outer cap to detach from the shell, thereby improving the quality of the fuse.

[0064] According to the disclosure and teaching of the above description, the technicians in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the above specific implementation, and any obvious improvement, replacement or modification made by the technicians in this field on the basis of the utility model belongs to the protection scope of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of explanation and do not constitute any limitation to the utility model.

Claims

1. A fuse, characterized in that: The invention comprises a shell (1), one end of the shell (1) is sleeved with a first outer cap (2), the other end of the shell (1) is sleeved with a second outer cap (3), the interior of the shell (1) is hollow, a fuse (4) is passed through the interior of the shell (1), one end of the fuse (4) is electrically connected to the first outer cap (2), the other end of the fuse (4) is electrically connected to the second outer cap (3), a fixing body (5) is provided at the end of the fuse (4), the end of the fixing body (5) away from the fuse (4) covers the surface of the first outer cap (2) and / or the second outer cap (3), the surface of the first outer cap (2) is provided with a first connecting piece (21), the end of the first connecting piece (21) away from the first outer cap (2) is embedded in the fixing body (5).

2. The fuse according to claim 1, characterized in that A second connecting piece (31) is provided on the surface of the second outer cap (3), and one end of the second connecting piece (31) away from the second outer cap (3) is embedded in the fixing body (5).

3. The fuse according to claim 1, characterized in that: The interior of the housing (1) is filled with arc-extinguishing material (6), and the arc-extinguishing material (6) wraps the surface of the fuse (4).

4. The fuse according to any one of claims 1 to 3, characterized in that: A recessed portion (11) is provided on the outer side of the end of the shell (1), and a bent piece (41) is provided on the end of the fuse (4), and the side surface of the bent piece (41) abuts against the surface of the recessed portion (11).

5. The fuse according to any one of claims 1 to 3, characterized in that: A first inner cap (7) is sleeved on one end of the shell (1); an end of the first inner cap (7) is concave to form a first notch (71); one end of the fuse (4) passes through the first notch (71) and is electrically connected to the first outer cap (2); and the fixing body (5) is filled between the first notch (71) and the first outer cap (2).

6. The fuse according to claim 5, characterized in that A first fixing piece (72) is provided on the surface of the first inner cap (7), and one end of the first fixing piece (72) away from the first inner cap (7) is embedded in the fixing body (5).

7. The fuse according to claim 5, characterized in that The other end of the shell (1) is sleeved with a second inner cap (8), the end of the second inner cap (8) is concave to form a second notch (81), one end of the fuse (4) passes through the second notch (81) and is electrically connected to the second outer cap (3), and the fixing body (5) is filled between the second notch (81) and the second outer cap (3).

8. The fuse according to claim 7, characterized in that A second fixing piece (82) is provided on the surface of the second inner cap (8), and one end of the second fixing piece (82) away from the second inner cap (8) is embedded in the fixing body (5).

9. The fuse according to claim 1, characterized in that: A conductive layer (22) is provided on the surface of the first outer cap (2) and / or the second outer cap (3), and the conductive layer (22) is used to enhance the conductive effect of the first outer cap (2) or the second outer cap (3).

10. The fuse according to claim 7, characterized in that A protective layer (73) is provided on the surface of the first inner cap (7) and / or the second inner cap (8), and the protective layer (73) is used to protect the first inner cap (7) or the second inner cap (8).

Images