Fuse with improved structure

Abstract

The utility model discloses a fuse with an improved structure, which comprises an insulating tube body, a fuse body, a left end copper cap piece and a right end copper cap piece, and the fuse body is embedded in a tube body through hole of a core part of the insulating tube body; the fuse body comprises a middle inclined part, a left end bending buckling part and a right end bending buckling part; each bending buckling part comprises a longitudinal part and a transverse part; a left end buckling groove is formed in the left end part of the insulating tube body, a right end buckling groove is formed in the right end part of the insulating tube body, and each buckling groove comprises a longitudinal positioning groove and a transverse positioning groove; the left end bending buckling part is buckled in the left end buckling groove, the right end bending buckling part is buckled in the right end buckling groove, the longitudinal parts are embedded and positioned in the longitudinal positioning grooves in the corresponding sides respectively, and the transverse parts are embedded and positioned in the transverse positioning grooves in the corresponding sides respectively; the left end copper cap piece and the right end copper cap piece are sleeved on the end portion of the insulation tube body in an interference fit mode, and each copper cap piece is respectively welded with the bending buckling portion on the corresponding side. The utility model has the advantages of novel design, simple structure, and simple and convenient production and assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic components technical field especially relates to a structure improved fuse. BACKGROUND

[0002] Fuse is a kind of current protector that when current exceeds specified value, the heat generated by itself makes fuse melt to disconnect circuit;Fuse is widely used in high and low voltage distribution system, control system and electrical equipment, as the protector of short circuit and overcurrent, is one of the most common protective devices.

[0003] The Chinese utility model patent with patent No. ZL 202323583584.3 and patent name of double-cap structure single-melt delay fuse discloses the following technical scheme: the double-cap structure single-melt delay fuse includes a fiberglass tube, a first inner cap at the left end, a second inner cap at the right end, a melt, a first outer cap at the left end, and a second outer cap at the right end. The fiberglass tube has inner buckle fixing grooves at both ends for installing outer caps. Each inner cap has a through hole at the end face for installing the melt. The melt has welding plates at both ends. Each welding plate is welded to the corresponding first inner cap or second inner cap. The outer cap is fixed with the inner buckle fixing groove through the locking edge structure.

[0004] In the production, assembly and processing of the double-cap structure single-melt delay fuse, the first inner cap and the second inner cap are assembled at the corresponding ends of the fiberglass tube. Then the melt is inserted into the fiberglass tube with the inner caps at both ends. One end of the melt is welded to one of the inner caps. After the melt is straightened, the other end of the melt is welded to the other inner cap, and the melt is kept in a diagonal welding state. After the melt and the inner caps are welded, the outer caps are installed on the inner caps, and the locking edge structure of each outer cap is fixed with the inner buckle fixing groove.

[0005] It should be noted that the double-cap structure single-melt delay fuse still has the following defects:

[0006] Defect 1: The double-cap structure single-melt delay fuse includes two outer cap structures, which are installed on the fiberglass tube to press-fit the inner caps on the corresponding sides. The overall structure is complex.

[0007] Defect 2: Each inner cap needs to have a through hole structure for the melt to pass through, which requires punching the inner cap during processing, increasing the production and assembly process. In addition, the melt cannot be accurately positioned before welding, which increases the inconvenience during welding. UTILITY MODEL CONTENTS

[0008] The utility model discloses a structure improved fuse, and the structure improved fuse is novel in design, simple in structure, and simple and convenient to produce and assemble.

[0009] To achieve the above object, the utility model discloses the following technical scheme.

[0010] A structure improved fuse, including insulating pipe body, fuse, left end copper cap spare, right end copper cap spare, the core of insulating pipe body is equipped with the pipe body through -hole of left and right transverse, and the left end of fuse, right end part respectively extends to the outside of insulating pipe body, and the left end of fuse, right end part respectively extends to the outside of insulating pipe body,

[0011] The fuse includes an inclined middle inclined portion extending, the left end of the middle inclined portion is bent to form a left end bent fastening portion, the right end of the middle inclined portion is bent to form a right end bent fastening portion, and the left end bent fastening portion and the right end bent fastening portion each include a longitudinal portion extending longitudinally and a transverse portion extending transversely.

[0012] The left end of the insulating pipe body is provided with a left end fastening groove, and the right end of the insulating pipe body is provided with a right end fastening groove arranged diagonally opposite to the left end positioning groove, and the left end fastening groove and the right end fastening groove each include a longitudinal positioning groove located on the corresponding side end face of the insulating pipe body and a transverse positioning groove located on the outer surface of the side wall of the insulating pipe body; the left end bent fastening portion of the fuse is fastened in the left end fastening groove of the insulating pipe body, the right end bent fastening portion of the fuse is fastened in the right end fastening groove of the insulating pipe body, and each longitudinal portion is embedded and positioned in the corresponding side longitudinal positioning groove, and each transverse portion is embedded and positioned in the corresponding side transverse positioning groove.

[0013] The left end copper cap spare is sleeved on the left end of the insulating pipe body by interference fit, and the left end copper cap spare is welded with the left end bent fastening portion of the fuse; the right end copper cap spare is sleeved on the right end of the insulating pipe body by interference fit, and the right end copper cap spare is welded with the right end bent fastening portion of the fuse.

[0014] The insulating pipe body is a rectangular pipe body with a rectangular shape in the longitudinal cross section, the left end of the insulating pipe body is provided with four left end fastening grooves arranged in a ring array, and the right end of the insulating pipe body is provided with four right end fastening grooves arranged in a ring array.

[0015] The left end and the right end of the insulating pipe body each have a wedge shape.

[0016] The insulating pipe body is a ceramic pipe.

[0017] The outer surfaces of the left end copper cap spare and the right end copper cap spare are respectively provided with a gold plating layer.

[0018] The inner part of the left end copper cap piece and the inner part of the right end copper cap piece are respectively provided with tin solder.

[0019] Compared with the prior art, the fuse of the embodiment one has the following beneficial effects, specifically: the left end copper cap piece and the right end copper cap piece are directly sleeved on the corresponding end part of the insulating pipe body through interference fit, and the left end copper cap piece and the right end copper cap piece are directly welded with the corresponding end part structure of the melt, before welding, the left end bent buckle part and the right end bent buckle part of the melt are respectively positioned and buckled in the left end buckle groove and the right end buckle groove on the corresponding side, that is, the melt positioning before welding can be realized by cooperation of the bent buckle part and the corresponding buckle groove; compared with the prior art, the fuse of the embodiment one has a simpler overall structure, and production and assembly are more convenient. Therefore, the improved fuse of the utility model has the advantages of novel design, simple structure, and simple and convenient production and assembly. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model will be further described below by using the drawings, but the embodiments in the drawings do not constitute any limitation to the utility model.

[0021] Figure 1 It is the structural schematic diagram of the utility model.

[0022] Figure 2 It is the exploded schematic diagram of the utility model.

[0023] Figure 3 It is the cross-sectional schematic diagram of the utility model.

[0024] In Figures 1 to 3 It includes:

[0025] 1-insulating pipe body;11-pipe body through hole;12-left end buckle groove;13-right end buckle groove;14-longitudinal positioning groove;15-transverse positioning groove;2-melt;21-intermediate inclined part;22-left end bent buckle part;23-right end bent buckle part;24-longitudinal part;25-transverse part;3-left end copper cap piece;4-right end copper cap piece;5-tin solder. DETAILED DESCRIPTION

[0026] The utility model will be further described below by using the drawings, but the embodiments in the drawings do not constitute any limitation to the utility model.

[0027] Embodiment one, as Figures 1 to 3As shown, a structurally improved fuse includes an insulating tube body 1, a fuse element 2, a left-end copper cap 3, and a right-end copper cap 4. The core of the insulating tube body 1 is provided with a tube through-hole 11 extending transversely therethrough. The fuse element 2 is embedded in the tube through-hole 11 of the insulating tube body 1, and the left and right ends of the fuse element 2 extend to the outside of the insulating tube body 1. It should be noted that the insulating tube body 1 of this embodiment 1 can be made of ceramic material, that is, the insulating tube body 1 of this embodiment 1 is a ceramic tube; of course, the above-mentioned materials do not constitute a limitation to this embodiment 1, that is, the insulating tube body 1 of this embodiment 1 can also be made of other insulating materials.

[0028] Among them, Figure 2 and Figure 3 As shown, the melt 2 includes a middle inclined portion 21 extending obliquely, the left end portion of the middle inclined portion 21 is bent to form a left end bent snap-fit ​​portion 22, and the right end portion of the middle inclined portion 21 is bent to form a right end bent snap-fit ​​portion 23, and the left end bent snap-fit ​​portion 22 and the right end bent snap-fit ​​portion 23 respectively include a longitudinal portion 24 extending longitudinally and a transverse portion 25 extending transversely.

[0029] Further, such as Figure 2 and Figure 3 As shown, the left end portion of the insulating tube body 1 is provided with a left end snap-fit ​​groove 12, and the right end portion of the insulating tube body 1 is provided with a right end snap-fit ​​groove 13 arranged diagonally to the left end positioning groove. The left end snap-fit ​​groove 12 and the right end snap-fit ​​groove 13 respectively include a longitudinal positioning groove 14 located on the corresponding side end surface of the insulating tube body 1 and a transverse positioning groove 15 located on the outer surface of the side wall of the insulating tube body 1; the left end bent snap-fit ​​portion 22 of the melt 2 is snap-fitted into the left end snap-fit ​​groove 12 of the insulating tube body 1, and the right end bent snap-fit ​​portion 23 of the melt 2 is snap-fitted into the right end snap-fit ​​groove 13 of the insulating tube body 1, and each longitudinal portion 24 is respectively embedded in the longitudinal positioning groove 14 positioned on the corresponding side, and each transverse portion 25 is respectively embedded in the transverse positioning groove 15 positioned on the corresponding side.

[0030] Furthermore, the left-end copper cap 3 is mounted on the left end portion of the insulating tube body 1 by an interference fit, and the left-end copper cap 3 is welded to the left-end bent and fastened portion 22 of the melt 2; the right-end copper cap 4 is mounted on the right end portion of the insulating tube body 1 by an interference fit, and the right-end copper cap 4 is welded to the right-end bent and fastened portion 23 of the melt 2.

[0031] It should be noted that, in order to improve the welding stability of the left copper cap 3, the right copper cap 4 and the melt 2, the first embodiment can also adopt the following structural design, specifically: the fifth embodiment, such as Figure 2 and Figure 3 As shown, the difference between the fifth embodiment and the first embodiment is that tin solder 5 is placed inside the left copper cap 3 and the right copper cap 4 respectively.

[0032] In the production and assembly process of the structurally improved fuse of the first embodiment, the steps include:

[0033] Step 1: Place tin solder 5 inside the left copper cap 3 and the right copper cap 4, and pre-melt the tin solder 5 using a heating table to prevent the solder from falling off;

[0034] Step 2: Insert the melt 2 into the tube through hole 11 of the insulating tube body 1. During the process of inserting the melt 2, align the left end bent snap-fit ​​portion 22 of the melt 2 with and snap it into the left end snap-fit ​​groove 12 of the left end of the insulating tube body 1, and then align the right end bent snap-fit ​​portion 23 of the melt 2 with and snap it into the right end snap-fit ​​groove 13 of the right end of the insulating tube body 1, and ensure that the left end bent snap-fit ​​portion 22 and the right end bent snap-fit ​​portion 23 are diagonally snapped into the left end snap-fit ​​groove 12 and the right end snap-fit ​​groove 13 on the corresponding sides, thereby ensuring that the middle inclined portion 21 of the melt 2 is spaced apart from the inner wall of the tube through hole 11;

[0035] Step 3: pre-press and assemble the left copper cap 3 and the right copper cap 4 with pre-melted tin solder 5 to the corresponding ends of the insulating tube 1, and respectively use interference fit to assemble the left copper cap 3 and the right copper cap 4;

[0036] Step 4: Place the assembled fuse into a pulse hot pressing welding device for press welding. Weld the left copper cap 3 and the right copper cap 4 once each. After welding, the tin solder 5 and the end structure of the melt 2 will be bonded together.

[0037] It should be emphasized that the left-end copper cap 3 and the right-end copper cap 4 of the present embodiment 1 are directly mounted on the corresponding ends of the insulating tube body 1 by interference fit, and the left-end copper cap 3 and the right-end copper cap 4 are directly welded to the corresponding end structures of the melt 2; compared with the prior art, the overall structure of the fuse of the present embodiment 1 is simpler and more convenient to produce and assemble.

[0038] In summary, it can be seen that, through the above structural design, the structurally improved fuse of the first embodiment has the advantages of novel design, simple structure, and easy and convenient production and assembly.

[0039] Example 2, as Figure 2 As shown, the difference between the second embodiment and the first embodiment is that the insulating tube body 1 is a rectangular tube body with a rectangular longitudinal cross-section, the left end portion of the insulating tube body 1 is provided with four left end buckling grooves 12 distributed in a circular array, and the right end portion of the insulating tube body 1 is provided with four right end buckling grooves 13 distributed in a circular array.

[0040] Need to point out that by opening with multiple left buckle slot, right end buckle slot 13, in the positioning buckle assembly melt 2 on the insulating tube 1, the structure of the improved fuse of the second embodiment of the present application can further improve the convenience of production and assembly.

[0041] Example three, as Figure 2 and Figure 3 Figure 2 Figure 3 The difference between the third embodiment and the first embodiment is that the left end and the right end of the insulating tube 1 are wedge-shaped.

[0042] In the process of assembling the left end copper cap 3 on the left end of the insulating tube 1 and the right end copper cap 4 on the right end of the insulating tube 1, the wedge-shaped left end and right end of the insulating tube 1 can guide the purpose, and further improve the convenience of assembling the left end copper cap 3 and the right end copper cap 4.

[0043] The fourth embodiment, the difference between the fourth embodiment and the first embodiment is that the outer surface of the left end copper cap 3 and the right end copper cap 4 is provided with a gold plating layer. It should be explained that the gold plating layer can effectively improve the stability and reliability of the PCB line board patch welding.

[0044] The above is only the preferred embodiment of the present application, for those skilled in the art, according to the idea of the present application, the specific embodiment and application range will be changed, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A structurally improved fuse comprising an insulating tube body (1), a fuse element (2), a left-end copper cap (3), and a right-end copper cap (4); the core of the insulating tube body (1) is provided with a tube body through hole (11) extending transversely therethrough; the fuse element (2) is embedded in the tube body through hole (11) of the insulating tube body (1), and the left end portion and the right end portion of the fuse element (2) respectively extend to the outside of the insulating tube body (1); Its characteristics are: The melt (2) includes a middle inclined portion (21) extending obliquely, the left end of the middle inclined portion (21) is bent to form a left end bent snap-fit ​​portion (22), the right end of the middle inclined portion (21) is bent to form a right end bent snap-fit ​​portion (23), the left end bent snap-fit ​​portion (22) and the right end bent snap-fit ​​portion (23) respectively including a longitudinal portion (24) extending longitudinally and a transverse portion (25) extending transversely; The left end portion of the insulating tube body (1) is provided with a left end buckling groove (12), and the right end portion of the insulating tube body (1) is provided with a right end buckling groove (13) arranged diagonally to the left end positioning groove, and the left end buckling groove (12) and the right end buckling groove (13) respectively include a longitudinal positioning groove (14) located on the corresponding side end surface of the insulating tube body (1) and a transverse positioning groove (15) located on the outer surface of the side wall of the insulating tube body (1); the left end bent buckling portion (22) of the melt (2) is buckled into the left end buckling groove (12) of the insulating tube body (1), and the right end bent buckling portion (23) of the melt (2) is buckled into the right end buckling groove (13) of the insulating tube body (1), and each longitudinal portion (24) is respectively embedded in the longitudinal positioning groove (14) positioned on the corresponding side, and each transverse portion (25) is respectively embedded in the transverse positioning groove (15) positioned on the corresponding side; The left-end copper cap (3) is fitted onto the left end of the insulating tube body (1) by means of interference fit, and the left-end copper cap (3) is welded to the left-end bent buckle portion (22) of the melt (2); the right-end copper cap (4) is fitted onto the right end of the insulating tube body (1) by means of interference fit, and the right-end copper cap (4) is welded to the right-end bent buckle portion (23) of the melt (2).

2. A fuse with improved structure according to claim 1, characterized in that: The insulating tube body (1) is a rectangular tube body with a longitudinal cross-section in a rectangular shape. The left end portion of the insulating tube body (1) is provided with four left end buckling grooves (12) distributed in a circular array, and the right end portion of the insulating tube body (1) is provided with four right end buckling grooves (13) distributed in a circular array.

3. The fuse with improved structure according to claim 1, characterized in that: The left end portion and the right end portion of the insulating tube body (1) are respectively wedge-shaped.

4. The fuse with improved structure according to claim 1, characterized in that: The insulating tube body (1) is a ceramic tube.

5. The fuse with improved structure according to claim 1, characterized in that: The outer surfaces of the left-end copper cap (3) and the right-end copper cap (4) are respectively provided with a gold-plated layer.

6. A fuse with an improved structure according to any one of claims 1 to 5, characterized in that: Tin solder (5) is placed inside the left-end copper cap (3) and the right-end copper cap (4), respectively.

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