Fuse with controllable fusing point

Abstract

The utility model belongs to the technical field of electric tool battery protection, and particularly relates to a fuse capable of controlling a fusing point, which comprises a shell, the interior of the shell is hollow, a fuse wire penetrates through the interior of the 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, 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 second outer cap, and the surface of the fuse wire is provided with at least one through hole or groove. According to the utility model, through the arrangement of the through holes or the grooves, the passing voltage can be divided into a plurality of sections, thereby achieving the purpose of voltage division, enabling the temperature of a fusing point to be concentrated in a certain area, and improving the short circuit and breaking protection capability of a product.

Description

Technical Field

[0001] The utility model belongs to the technical field of power tool battery protection, and in particular relates to a fuse with controllable fusing point. 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 fuse disconnection point in the middle of the existing fuse is random, and the difference in current size results in no fixed point for the disconnection point.

[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 with controllable fusing point in view of the deficiencies of the prior art, which can divide the passing voltage into multiple sections, thereby achieving the purpose of voltage division, allowing the temperature of the fusing point to be concentrated between a certain area, and improving the short-circuit and disconnection protection capabilities of the product.

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

[0006] A fuse with controllable melting point comprises a shell, wherein the shell is hollow inside, a fuse is inserted inside the shell, a first outer cap is sleeved on one end of the shell, a second outer cap is sleeved on the other end 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 arranged at the end of the fuse, an end of the fixing body away from the fuse covers the surface of the first outer cap or the second outer cap, the fixing body is used to increase the contact area between the fuse and the first outer cap and / or the second outer cap, and the surface of the fuse has at least one through hole or groove.

[0007] Preferably, the interior of the shell is filled with arc-extinguishing material, and the arc-extinguishing material wraps the surface of the fuse.

[0008] 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.

[0009] 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.

[0010] Preferably, the other end of the shell is sleeved with a second inner cap, the end of the second inner cap is concave to form a second notch, the other 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.

[0011] 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.

[0012] Preferably, a plurality of the through holes are arranged at intervals along the surface of the fuse, and each of the through holes is circular, square or elliptical in shape.

[0013] Preferably, the spacing between adjacent through holes gradually increases from the middle of the side surface of the fuse to both ends of the fuse.

[0014] Preferably, the plurality of grooves are arranged on two sides of the fuse in a relatively staggered manner.

[0015] Preferably, the plurality of grooves are symmetrically arranged on two sides of the fuse.

[0016] The beneficial effects of the utility model are as follows: the utility model comprises a shell, the interior of the shell is hollow, a fuse is inserted into the interior of the 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, 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, and the surface of the fuse has at least one through hole or groove. The utility model can divide the voltage passing through into multiple sections by providing through holes or grooves, thereby achieving the purpose of voltage division, allowing the temperature of the fuse point to be concentrated between a certain area, so that the discreteness of the fuse's melting time 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of Example 1 and Example 2 of the utility model.

[0018] Figure 2 This is one of the overall structural schematic diagrams of Example 3 of the utility model.

[0019] Figure 3This is the second schematic diagram of the overall structure of Example 3 of the utility model.

[0020] Figure 4 This is a schematic diagram of the overall structure of Example 4 of the utility model.

[0021] Figure 5 This is a schematic diagram of the overall structure of a fuse with a circular through hole according to Example 5 of the utility model.

[0022] Figure 6 This is a schematic diagram of the overall structure of a fuse with a square through hole according to Example 5 of the utility model.

[0023] Figure 7 This is a schematic diagram of the overall structure of a fuse with an elliptical through hole according to Example 5 of the utility model.

[0024] Figure 8 This is a schematic diagram of the overall structure of the fuse of Example 6 of the present utility model.

[0025] Fig. 9 This is a schematic diagram of the overall structure of the fuse of Example 7 of the present utility model.

[0026] Fig.10 This is a schematic diagram of the overall structure of the fuse of Example 8 of the present utility model.

[0027] Among them: 1. Shell; 11. Arc extinguishing material; 12. Recessed portion; 2. Fuse; 21. Through hole; 22. Groove; 23. Bend piece; 3. First outer cap; 4. Second outer cap; 5. Fixed body; 6. First inner cap; 61. First notch; 7. Second inner cap; 71. Second notch. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] The following is combined with Figures 1 to 10 The utility model is further described in detail with specific embodiments, but is not intended to limit the utility model.

[0031] Example 1

[0032] A fuse with controllable fusing point comprises a shell 1, wherein the shell 1 is hollow inside and is a porcelain tube. A fuse 2 is penetrated inside the shell 1. A first outer cap 3 is sleeved on one end of the shell 1 and a second outer cap 4 is sleeved on the other end of the shell 1. The first outer cap 3 and the second outer cap 4 are both used for electrically connecting to an external device. One end of the fuse 2 is electrically connected to the first outer cap 3 and the other end of the fuse 2 is electrically connected to the second outer cap 4. A fixing body 5 is provided at both ends of the fuse 2. The fixing body 5 covers the surface of the first outer cap 3 and / or the second outer cap 4 at one end away from the fuse 2. The fixing body 5 is used for increasing the contact area between the fuse 2 and the first outer cap 3 or the second outer cap 4. The fixing body 5 is solder paste, which enhances the conductive effect between the fuse 2 and the first outer cap 3 or the second outer cap 4 and also enhances the stability of the connection between the fuse 2 and the first outer cap 3 or the second outer cap 4. The surface of the fuse 2 has at least one through hole 21 or a groove 22. By setting the through hole 21 or the groove 22, 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 2 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 middle of the fuse 2 can be punched, grooved or annularly cut, the size and array distribution of the through hole 21 can be regular, or the variable can be increased to be evenly distributed, the shape of the through hole 21 and the groove 22 can be circular, oval, square, prismatic or triangular, or a combination of multiple irregular shapes; the fuse 2 can be pure copper, copper tin-plated, copper silver-plated, silver-copper alloy tin-plated or a variety of metal alloy composite strip processes; the arc extinguishing body can be filled in the through hole 21 or the groove 22, and the arc extinguishing body can be silicone rubber, which is used to improve the arc extinguishing ability of the fuse; the fuse 2 with the through hole 21 or the groove 22 can be used alone, or it can be wound into a spiral fuse 2 by a winding machine according to the requirements of the melting time.

[0033] Example 2

[0034] The present embodiment is different from the embodiment 1 in that a first inner cap 6 is sleeved on one end of the housing 1, the outer side surface of the first inner cap 6 is electrically connected to the inner side surface of the first outer cap 3, the end of the first inner cap 6 is concave to form a first notch 61, one end of the fuse 2 passes through the first notch 61 and is electrically connected to the first outer cap 3, and a fixing body 5 is filled between the first notch 61 and the first outer cap 3. The fixing body 5 is disposed at the first notch 61, one end of the fuse 2 is electrically connected to the first inner cap 6 and the first outer cap 3 through the fixing body 5, and the first outer cap 3 is sleeved on the outer side of the first inner cap 6, thereby increasing the conductive area between the fuse 2 and the first outer cap 3.

[0035] In this embodiment, the other end of the housing 1 is sleeved with a second inner cap 7, the outer side surface of the second inner cap 7 is electrically connected to the inner side surface of the second outer cap 4, the end of the second inner cap 7 is concave to form a second notch 71, the other end of the fuse 2 passes through the second notch 71 and is electrically connected to the second outer cap 4, and a fixing body 5 is filled between the second notch 71 and the second outer cap 4. The fixing body 5 is arranged at the second notch 71, one end of the fuse 2 is electrically connected to the second inner cap 7 and the second outer cap 4 through the fixing body 5, and the second outer cap 4 is sleeved on the outside of the second inner cap 7, thereby increasing the conductive area between the fuse 2 and the second outer cap 4.

[0036] By setting the first inner cap 6 and the second inner cap 7, the fuse 2 can be fixed inside the shell 1, the first notch 61 and the second notch 71 are both concave toward the inside of the shell 1, and the overall shape of the first inner cap 6 and the second inner cap 7 is M-shaped. This structure is connected with the fixing body 5 and the fuse 2, so that the first inner cap 6 and the second inner cap 7 can be fixed at both ends of the shell 1, and then the first outer cap 3 is sleeved on the outside of the first inner cap 6, and the second outer cap 4 is sleeved on the outside of the second inner cap 7, thereby increasing the electrical connection area between the fuse 2 and the first outer cap 3 or the second outer cap 4.

[0037] In this embodiment, a recessed portion 12 is provided on the outer side of the end of the housing 1, and the side surface of the first inner cap 6 and / or the second inner cap 7 abuts against the surface of the recessed portion 12. By providing the recessed portion 12, part of the inner side surface of the first outer cap 3 and / or the second outer cap 4 can also abut against the surface of the housing 1, thereby enhancing stability.

[0038] The other structures of this embodiment are the same as those of Embodiment 1 and will not be described again here.

[0039] Example 3

[0040] The present embodiment is different from the embodiment 1 in that a recessed portion 12 is provided at the outer side of the end of the housing 1, and a bent piece 23 is provided at the end of the fuse 2, and the side surface of the bent piece 23 abuts against the surface of the recessed portion 12. By providing the bent piece 23, 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 23 is electrically connected to the inner side surface of the first outer cap 3 through the fixing body 5, which can enhance the conductive effect between the fuse 2 and the first outer cap 3. The fixing body 5 is provided in the recessed portion 12 and on the inner end surface of the first outer cap 3, which can increase the conductive area between the fuse 2 and the first outer cap 3.

[0041] The other structures of this embodiment are the same as those of Embodiment 1 and will not be described again here.

[0042] Example 4

[0043] The present embodiment is different from the embodiment 1 in that the interior of the housing 1 is filled with arc extinguishing material 11, and the arc extinguishing material 11 wraps the surface of the fuse 2. By providing the arc extinguishing material 11, the arc extinguishing capability can be improved and the safety of the fuse can be improved. The arc extinguishing material 11 can be quartz sand.

[0044] The other structures of this embodiment are the same as those of Embodiment 1 and will not be described again here.

[0045] Example 5

[0046] The present embodiment is different from the first embodiment in that a plurality of through holes 21 are arranged at intervals along the surface of the fuse 2 , and each through hole 21 is circular, square or elliptical in shape, or is a combination of one or more of the circular, square or elliptical shapes.

[0047] The other structures of this embodiment are the same as those of Embodiment 1 and will not be described again here.

[0048] Example 6

[0049] The present embodiment is different from the embodiment 1 in that the spacing between adjacent through holes 21 gradually increases from the middle of the side of the fuse 2 to both ends of the fuse 2. The distance between adjacent through holes 21 increases from the middle of the side of the fuse 2 to both ends by a distance of L mm, and the value of L can be 0.3 to 0.7, for example, 0.3, 0.4, 0.5, 0.6 or 0.7.

[0050] The other structures of this embodiment are the same as those of Embodiment 1 and will not be described again here.

[0051] Example 7

[0052] The difference between this embodiment and embodiment 1 is that a plurality of grooves 22 are relatively staggeredly arranged on two sides of the fuse 2. The relatively staggered arrangement of the grooves 22 on the sides of the fuse 2 does not reduce the conductive effect of the fuse 2, and the fuse 2 can be blown faster from the position of the grooves 22.

[0053] The other structures of this embodiment are the same as those of Embodiment 1 and will not be described again here.

[0054] Example 8

[0055] The present embodiment is different from the first embodiment in that a plurality of grooves 22 are symmetrically arranged on two sides of the fuse 2. The grooves 22 are relatively symmetrically arranged on the sides of the fuse 2 to divide the fuse 2 into large sections, and the fuse 2 can be blown faster through the grooves 22.

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

[0057] Obviously, the utility model includes a shell, the interior of the shell is hollow, a fuse is inserted into the interior of the 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, 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 fixed body is used to increase the contact area between the fuse and the first outer cap or the second outer cap, and the surface of the fuse has at least one through hole or groove. The utility model can divide the passing voltage into multiple sections by setting a through hole or groove, so as to achieve the purpose of voltage division, so that the temperature of the fuse point is concentrated between a certain area, so that the discreteness of the fuse time 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.

[0058] 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 with controllable fusing point, characterized in that: The invention comprises a shell (1), wherein the shell (1) is hollow inside, a fuse (2) is inserted into the shell (1), one end of the shell (1) is sleeved with a first outer cap (3), and the other end of the shell (1) is sleeved with a second outer cap (4), one end of the fuse (2) is electrically connected to the first outer cap (3), and the other end of the fuse (2) is electrically connected to the second outer cap (4), a fixing body (5) is arranged at the end of the fuse (2), and an end of the fixing body (5) away from the fuse (2) covers the surface of the first outer cap (3) and / or the second outer cap (4), and the surface of the fuse (2) has at least one through hole (21) or a groove (22).

2. The fuse with controllable fusing point as claimed in claim 1, characterized in that: The interior of the housing (1) is filled with arc-extinguishing material (11), and the arc-extinguishing material (11) wraps the surface of the fuse (2).

3. The fuse with controllable fusing point as claimed in claim 1, characterized in that: A recessed portion (12) is provided on the outer side of the end of the shell (1), and a bent piece (23) is provided on the end of the fuse (2), and the side surface of the bent piece (23) abuts against the surface of the recessed portion (12).

4. The fuse with controllable fusing point as claimed in claim 1, characterized in that: A first inner cap (6) is sleeved on one end of the shell (1); an end of the first inner cap (6) is concave to form a first notch (61); one end of the fuse (2) passes through the first notch (61) and is electrically connected to the first outer cap (3); and the fixing body (5) is filled between the first notch (61) and the first outer cap (3).

5. The fuse with controllable fusing point as claimed in claim 4, characterized in that: The other end of the shell (1) is sleeved with a second inner cap (7), the end of the second inner cap (7) is concave to form a second notch (71), the other end of the fuse (2) passes through the second notch (71) and is electrically connected to the second outer cap (4), and the fixing body (5) is filled between the second notch (71) and the second outer cap (4).

6. The fuse with controllable fusing point as claimed in claim 5, characterized in that: A recessed portion (12) is provided on the outer side of the end of the shell (1), and the side surface of the first inner cap (6) and / or the second inner cap (7) abuts against the surface of the recessed portion (12).

7. The fuse with controllable fusing point according to any one of claims 1 to 6, characterized in that: A plurality of through holes (21) are arranged at intervals along the surface of the fuse (2), and each through hole (21) is circular, square or elliptical in shape.

8. The fuse with controllable fusing point as claimed in claim 7, characterized in that: The spacing between adjacent through holes (21) gradually increases from the middle of the side surface of the fuse (2) to both ends of the fuse (2).

9. The fuse with controllable fusing point according to any one of claims 1 to 6, characterized in that: The plurality of grooves (22) are arranged on two side surfaces of the fuse (2) in a relatively staggered manner.

10. The fuse with controllable fusing point according to any one of claims 1 to 6, characterized in that: The plurality of grooves (22) are symmetrically arranged on two sides of the fuse (2).

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