CN218568768U - Fuse element - Google Patents

Abstract

The application discloses fuse-element, including support unit and fuse-element unit, the support unit includes end, connecting rod and link, and the end is suitable for and is connected with external circuit electrically conductive, and the link is connected with the one end of fuse-element unit electrically conductive, and the other end of fuse-element unit is suitable for and is connected with external circuit electrically conductive, and the connecting rod both ends are connected with end and link detachably respectively, thereby the fuse-element unit is suitable for fusing protection external circuit. The fuse element is convenient to install, can replace parts, and meets the requirements of different installation environments.

Description

Fuse element

Technical Field

The application relates to the field of electrical equipment protection, in particular to a fuse.

Background

With the popularization of global electronic products, when a circuit is broken down or abnormal, an increasing current may damage some important devices in the circuit, even a fire occurs, and thus overcurrent protection is very necessary in a power distribution system. The simplest and most common protection device is a fuse. The fuse element is an electric appliance which uses a metal conductor as a melt body to be connected in series in a circuit, and when overload or short-circuit current passes through the melt body, the fuse element is fused due to self heating, so that the circuit is cut off. The fuse element has simple structure and convenient use, and is widely applied to electric power systems, various electrical equipment and household appliances as a protective device.

In order to prevent certain high-power electric equipment from being damaged, a fuse part is usually arranged for the electric equipment, however, after the existing fuse part is connected to a circuit, if the circuit is adjusted or the high-power electric equipment moves for a certain distance, the circuit connected with the fuse part needs to be replaced or the length of the circuit needs to be adjusted, the whole fuse part needs to be replaced in the prior art, and the standard operation even needs workers holding electrician certificates, which is time-consuming and labor-consuming.

Disclosure of Invention

The utility model provides a fuse-link that installation is convenient can change some parts simultaneously, adapts to different installation environment needs.

In order to achieve the above purposes, the technical scheme adopted by the application is as follows: the utility model provides a fuse-link, includes support unit and fuse-element unit, the support unit includes end, connecting rod and link, the end is suitable for and is connected with external circuit electrically conductive, the link with the one end electrically conductive connection of fuse-element unit, the other end of fuse-element unit is suitable for and is connected with external circuit electrically conductive, the connecting rod both ends respectively with the end reaches link detachably connects, thereby the fuse-element unit is suitable for fusing protection external circuit.

Preferably, two ends of the connecting rod are respectively connected with the end head and the first connecting part in a threaded fit manner.

As another preferred mode, the support unit and the melt unit are electrically connected through a connection unit, the connection unit includes a first connector and a second connector which are sequentially connected, the connection end includes a first connection portion and a second connection portion, the first connection portion is detachably connected with the connection rod, the second connection portion is connected with the first connector, the second connector is suitable for being connected with a power transmission line of an external circuit, and two ends of the melt unit are respectively connected with the first connector and the second connector; the connection unit further comprises a tensioning wire that maintains the first and second joints in connection.

Preferably, the connecting end and the first joint are integrally formed.

As another preference, the diameter of the tensioning wire is smaller than the diameter of the melt unit, and the resistivity of the tensioning wire is greater than the resistivity of the melt unit, so that no current passes through the tensioning wire.

As another preferred mode, the support unit further comprises a sleeve, the sleeve is sleeved on the second connecting portion, the connecting unit, the melt unit and the outer side of the external power transmission line, the second connecting portion is in interference fit with the sleeve, and the end face of the first connecting portion limits the sleeve.

As another preference, the sleeve is made of an insulating material.

As another preference, the bracket unit is made of a conductive metal material.

Further preferably, the bracket unit is made of copper.

Compared with the prior art, the beneficial effect of this application lies in:

(1) The length of the fuse link is adjusted by replacing the connecting unit, so that the fuse link is suitable for different installation environments, the fuse link is prevented from being replaced in the whole section after the line is replaced or the distance of an electric appliance is adjusted, and manpower and material resources are saved;

(2) Through the arrangement of the tension wire, the fuse wire is prevented from falling off due to gravity before being heated but not reaching the fusing point, and the normal use of the electrical appliance is ensured;

(3) Through the setting of sheathed tube, shelter from the fuse completely in insulation support's inside, prevent that the fuse melts the erosion of drippage, electrocute and water dirt.

Drawings

FIG. 1 is a schematic view of a fuse of the present invention;

FIG. 2 is a schematic view of the internal structure of the fuse of the present invention;

fig. 3 is a front exploded view of the fuse of the present invention;

fig. 4 is an exploded view of the fuse of the present invention;

in the figure: 100. a melt unit; 110. a fuse; 200. a connection unit; 210. a first joint; 220. a second joint; 230. tensioning the wire; 300. a holder unit; 310. a tip; 320. a connecting rod; 330. a connecting end; 331. a first connection portion; 332. a second connecting portion; 340. a sleeve; 400. and (4) a power transmission line.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The fuse link of the present invention includes a melt unit 100, a connection unit 200, and a rack unit 300, and the melt unit 100 is connected to the rack unit 300 and the power transmission line 400 through the connection unit 200, respectively. The melt unit 100 is made of a metal conductor with a low melting point, and is fused by itself to break the circuit after a current overload. The connection units 200 are disposed at both ends of the melt unit 100 for connecting the rack unit 300 and the power lines 400 in the circuit, respectively. The rack unit 300 is assemblably coupled to one end of the melt unit 100 by the coupling unit 200.

The bracket unit 300 is arranged in an assembly form, so that the fuse element can be conveniently installed and connected into a circuit, and the bracket unit is suitable for different installation environments. When the circuit is adjusted or the distance of the serially connected high-power electric appliance is changed, the interface of the bracket unit 300 is conveniently replaced or the bracket units 300 with different lengths are replaced after the circuit is disconnected, the original fuse can be continuously used, the cost of manpower and material resources is saved, and the method has practical application significance.

Referring to fig. 1 to 2, the stand unit 300 includes a head 310, a connecting rod 320, and a connecting end 330, which are connected in sequence, and the connecting end 330 includes a first connecting portion 331 and a second connecting portion 332. The cradle unit 300 accesses the circuit through the tip 310; the connecting rod 320 has one end connected to the terminal 310 and the other end connected to the first connecting portion 331. The length of the bracket unit 300 can be adjusted by adjusting the length of the connecting rod 320; or the connecting rod 320 is replaced to be connected with different terminals 310, so that the circuit protected by the fuse element can be replaced conveniently. The first connection portion 331 is connected to the second connection portion 332, and the second connection portion 332 connects the connection unit 200 and the melt unit 100.

In some embodiments of the present disclosure, the tip 310, the connecting rod 320 and the first connecting portion 331 are connected together in an assembling manner, the connecting rod 320 is detached from the rack unit 300, and after the connecting rod 320 with different lengths is replaced, the tip 310 and the first connecting portion 331 are reconnected, thereby achieving convenient and stable adjustment of the length of the rack unit 300; or the connecting rod 320 is detached from the original terminal 310 and then connected to the terminal 310 of another line again, so that the circuit protected by the fuse link can be replaced quickly.

In some embodiments of the present application, the connecting rod 320 is connected to the terminal 310 and the first connecting portion 331 respectively in a plugging or hooking manner, and the technology is mature and will not be described herein again.

In some embodiments of the present application, the connecting rod 320 is connected to the end head 310 and the first connecting portion 331 respectively in a threaded manner, specifically, the end head 310 is configured as an internal thread structure, one end of the connecting rod 320 is configured as an external thread, the other end is configured as an internal thread, and one end of the first connecting portion 331 is configured as an external thread structure. Therefore, the connecting rod 320 can be easily disassembled and assembled by means of the knob.

In some embodiments of the present disclosure, the length of the connecting rod 320 may be adjustable, such that the entire connecting rod 320 is replaced with the connecting rod 320 having the same connecting structure but different lengths, or a plurality of connecting rods 320 are connected in a threaded manner to increase the length; or the connecting rod 320 is removed and the tip 310 is directly connected to the first connecting portion 331 to shorten the length of the stand unit 300.

In some embodiments of the present application, the holder unit 300 is made of a conductive metal having a certain hardness, and preferably, the holder unit 300 is made of metallic copper. The copper metal is cheap and easy to obtain, has certain hardness, and can withstand the impact of a large amount of gas generated when the melt unit 100 is fused without deformation.

Referring to fig. 1, 3 and 4, in some embodiments of the present disclosure, the supporting unit 300 may further include a sleeve 340 for covering the melt unit 100 and the connecting unit 200, the sleeve 340 is movably sleeved outside the melt unit 100 and the connecting unit 200, and the end surface of the sleeve 340 abuts against the end surface of the first connecting portion 331, so that the sleeve 340 cannot move toward the end head 310 any more; the second connecting portion 332 is inserted into the sleeve 340 and forms an interference fit with the sleeve 340, so that the sleeve 340 does not slide freely. The sleeve 340 is preferably made of an insulating material. The sleeve 340 is beneficial to preventing the fused fuse 110 from dropping on the surface of other structures and being difficult to clean; the melt unit 100 is not exposed to the outside, reducing corrosion.

The fuse unit 100 is a fuse main acting unit, and includes a fuse wire 110, both ends of the fuse wire 110 are respectively connected to both ends of the connection unit 200, and the fuse wire 110 is made of a metal conductor having a certain melting point, is adapted to conduct electricity, and is melted and broken after a current overload, thereby breaking a connected circuit. The fuse 110 is connected at both ends thereof to the second connecting portion 332 and the power line 400, respectively, so that the holder unit 300, the fuse 110 and the power line 400 form a path through which current flows.

In some embodiments, according to the actual use requirement, a segment of cylindrical fuse 110 can be placed on the first connector 210 and the second connector 220, and then the contacted fuse 110 is melted, so that the fuse 110 can be easily connected in the fuse link, and different fuses 110 can be selected according to the actual current limit.

The connection unit 200 is used to connect the melt unit 100 and the rack unit 300, and includes a first joint 210 and a second joint 220. The first connector 210 is used to connect one end of the fuse 110 and the second connection portion 332; the second connector 220 is used to connect the fuse 110 and the power line 400 at the other end.

In some embodiments of the present disclosure, the first connecting portion 331, the second connecting portion 332 and the first connector 210 are preferably integrally formed, so as to reduce the number of connecting positions and reduce the process cost.

In some embodiments of the present application, the connection unit 200 is further provided with a tension wire 230 for maintaining the connection state of the fuse 110 before the fuse 110 is partially melted but not completely melted after being heated. The two ends of the tension wire 230 are respectively connected to the ends of the two connection units 200, but are not connected to the fuse 110; the tensile wires 230 extend in parallel to the extension direction of the fuse 110. The tension wire 230 is provided in a filament structure having a diameter smaller than that of the fusible link 110; the material of the tension wire 230 is also made of a metal material with a relatively high resistance, so that the resistance of the tension wire 230 is much greater than that of the fuse 110, and current does not flow through the tension wire 230, thereby maintaining the fusing effect of the fuse 110. The current passes through the fuse 110 to heat the fuse 110, and the fuse 110 is softened and deformed before being blown out due to the low melting point characteristic of the fuse 110, so that the fuse 110 may be broken and dropped off in advance due to its own gravity deformation, and therefore, the structure of the tension wire 230 is provided to maintain the tension state between the first tab 210 and the second tab 220 after the fuse 110 is deformed, and the fuse is not broken due to gravity falling.

In some embodiments of the present invention, the shape of the connection unit 200 may be a shape having a groove, such as a semi-cylindrical shape, a semi-circular arc surface, or the like, to facilitate fixing the fuse 110 to the connection unit 200. The connection unit 200 also has a thickness to facilitate connection of the tension wire 230 parallel to the fusible link 110 on the side thereof. The material of the connection unit 200 may be selected from a conductive material such as copper, and may also be selected from an insulating material such as plastic. The connection unit 200 facilitates more stable connection of the fuse 110 and facilitates the provision of the tension wire 230 on the connection unit 200, so that the fuse 110 can be prevented from being disconnected due to softening deformation.

The connection part of the second joint 220 and the power transmission line 400 can be preset to be a hollow structure, one end of the power transmission line 400 is placed inside the hollow structure of the second joint 220 according to an actual use scene, and then the second joint 220 is deformed by external force pressing so that the power transmission line 400 and the second joint 220 are tightly connected together.

Referring to fig. 1 to 4, in an embodiment of the present invention, the rack unit 300 is made of copper and has a cylindrical structure, which is stable, saves material, and is not easy to cut hands. Wherein the terminal 310 is provided with a rounded end surface adapted to facilitate slotted connection of the fuse in the circuit. The portions of the head 310, the connecting rod 320 and the first connecting portion 331, which are connected in sequence, are formed in a cylindrical shape having the same diameter, so that the holder unit 300 is better connected as a whole.

The connection mode of end 310, connecting rod 320 and first connecting portion 331 sets up to interior external screw thread cooperation structure, specifically sets up the internal thread structure on end 310, and the one end of connecting rod 320 sets up the external screw thread, and its other end sets up the internal thread structure, sets up the external screw thread structure on first connecting portion 331. Wherein, all interior external screw thread structure sizes are all unanimous to can interconnect: the tip 310 is directly connected to the first connection portion 331, which is the shortest length of the fuse; the connecting rod 320 or the connecting rods 320 of different lengths are replaced by the internal and external thread matching connection respectively to increase the length of the fuse link. The fuse-link can the assembled design, is favorable to adapting to more installation environment, avoids separating whole fuse-link under the condition that fuse-link connecting circuit need be changed, or the both ends length of connecting the fuse-link changes, uses manpower and materials sparingly.

The first connection portion 331 has an external thread structure at one end thereof to be connected to the connection rod 320, and has the other end thereof connected to the second connection portion 332. The second connecting portion 332 is provided as a cylinder having a diameter smaller than that of the first connecting portion 331. One end of the fuse 110 is connected to the second connection portion 332 so as to communicate current. The design of the first connection portion 331 and the second connection portion 332 is advantageous for adding an outer sleeve 340, so that the sleeve 340 enters from one end of the power transmission line 400, and the farthest moving distance of the sleeve 340 relative to the power transmission line 400 is when one end of the sleeve 340 just abuts against the end surface of the first connection portion 331. The sleeve 340 is a hollow cylindrical pipe with a diameter equal to that of the connecting rod 320, and can be just sleeved on the outer cylindrical surface of the second connecting portion 332, so as to completely shield the fuse 110 and the connecting unit 200 inside the sleeve 340.

Referring to fig. 2 to 4, the fuse 110 is connected at both ends thereof to the first connector 210, the second connection part 332, the second connector 220, and the power line 400, respectively, to form a current path. The connecting unit 200 is further provided with a tension wire 230, the direction of the tension wire 230 is parallel to the fuse 110, and two ends of the tension wire are respectively connected to the side end faces of the first connector 210 and the second connector 220; the tension wire 230 is not in contact with the fuse 110, and has a resistance value much larger than that of the fuse 110, so that current does not pass through the tension wire 230, and the tension wire 230 is only used to prevent the fuse 110 from falling off due to gravity after being deformed by heat.

The fuse part can be quickly assembled, so that the accessed circuit can be quickly replaced or the length of the fuse part can be adjusted, and the fuse part is suitable for different installation environments; the tension wire 230 is arranged to prevent the fuse wire 110 from being softened by heat and falling off in advance before the fuse wire reaches the melting point; the sleeve 340 can completely shield the fuse 110 and the connection unit 200, and prevent an electric shock, melting and dropping of the fuse 110, and corrosion due to water splashing.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims (9)

1. A fuse, characterized by: the fuse-element protection device comprises a support unit and a fuse-element unit, wherein the support unit comprises an end, a connecting rod and a connecting end, the end is suitable for being in conductive connection with an external circuit, the connecting end is in conductive connection with one end of the fuse-element unit, the other end of the fuse-element unit is suitable for being in conductive connection with the external circuit, two ends of the connecting rod are respectively in detachable connection with the end and the connecting end, and the fuse-element unit is suitable for fusing to protect the external circuit.

2. The fuse of claim 1, wherein: the support unit is electrically connected with the melt unit through a connecting unit, the connecting unit comprises a first joint and a second joint which are sequentially connected, the connecting end comprises a first connecting part and a second connecting part, the first connecting part is detachably connected with the connecting rod, the second connecting part is connected with the first joint, the second joint is suitable for being connected with a power transmission line of an external circuit, and two ends of the melt unit are respectively connected with the first joint and the second joint; the connection unit further comprises a tensioning wire that maintains the first and second joints in connection.

3. The fuse of claim 2, wherein: the two ends of the connecting rod are respectively connected with the end head and the first connecting part in a thread fit mode.

4. The fuse of claim 3, wherein: the connecting end and the first joint are integrally formed.

5. The fuse of claim 3, wherein: the puller wire has a diameter less than a diameter of the melt unit and a resistivity greater than a resistivity of the melt unit such that current does not pass through the puller wire.

6. The fuse of claim 3, wherein: the support unit further comprises a sleeve, the sleeve is sleeved on the second connecting portion, the connecting unit, the melt unit and the outer side of an external power transmission line, the second connecting portion is in interference fit with the sleeve, and the end face of the first connecting portion is limited by the sleeve.

7. The fuse of claim 6, wherein: the sleeve is made of an insulating material.

8. The fuse of any of claims 1-7, wherein: the support unit is made of conductive metal materials.

9. The fuse of claim 8, wherein: the support unit is made of copper.

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