Slow-fusing circuit fuse

Abstract

The utility model relates to the technical field of fuses, and particularly discloses a slow-fusing circuit fuse which comprises a shell, a top cover is fixedly arranged on the shell, clamping grooves are symmetrically arranged on two sides of the shell, a mounting groove is arranged in the shell, a connecting plate is arranged in the mounting groove, the connecting plate is fixedly connected with the top cover, a fusing assembly is fixedly arranged on one side of the connecting plate, and the fusing assembly is fixedly arranged on the other side of the connecting plate. Side plates are fixedly connected to the two sides of the connecting plate, a limiting plate is fixedly connected to the connecting plate, a protruding block is fixedly arranged on the connecting plate, clamping blocks are fixedly arranged on the outer sides of the side plates, and the clamping blocks are matched with the clamping grooves. According to the fuse provided by the utility model, the design of plug-in installation is adopted, so that the operation is simple and convenient when the fuse is produced and assembled, the internal fusing assembly is stably installed, the fusing assembly is reliably fixed, the use safety of the fuse is improved, the fusing assembly adopts the double-hole design, so that the fusing assembly can be stably and reliably disconnected in an overcurrent state, and the safety of the fuse is improved. The stable circuit disconnection process is ensured, and equipment in the circuit is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of fuses, in particular to a slow-blow circuit-breaking fuse. Background Art

[0002] A fuse is a device used in a circuit to protect the circuit from overcurrent. When overcurrent flows in the circuit, the fuse will disconnect in time to protect the circuit.

[0003] In the prior art, there is a device named as tuning fork terminal slow-break fuse disclosed in application number: CN201080014760.8, which includes a plurality of conductive terminal parts, which have a first and a second tuning fork arm, and a gap arranged therebetween, at least one of the terminal tuning fork arms has an upper end, a lower end, and an inclined wall arranged between the upper and lower ends, the inclined wall being configured to provide an increased surface area of ​​the first of the plurality of conductive terminal parts, and a fusible link being arranged between the plurality of terminal parts, wherein the fusible link is configured to interrupt the flow of current between the plurality of terminal parts under a certain high current state.

[0004] However, in the prior art, such as the slow-blow fuse mentioned in application number CN201080014760.8, the fuse shell is in the form of front and rear buckle assembly, and needs to be connected and fixed with screws, the disassembly and assembly process is cumbersome, and it is not easy to replace the internal parts of the fuse in actual use. Therefore, it is necessary to design a slow-blow fuse. Utility Model Content

[0005] The utility model aims to provide a slow-blow circuit-breaking fuse to solve the problems in the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A slow blow circuit breaker comprises a shell, a top cover is fixedly arranged on the shell, two sides of the shell are symmetrically provided with card slots, a mounting slot is arranged in the shell, a connecting plate is arranged in the mounting slot, and the connecting plate is fixedly connected to the top cover;

[0008] A fuse assembly is fixedly provided on one side of the connecting plate, side plates are fixedly connected on both sides of the connecting plate, a limit plate is fixedly connected to the connecting plate, a protrusion is fixedly provided on the connecting plate, and a clamping block is fixedly provided on the outer side of the side plate, and the clamping block cooperates with the clamping slot.

[0009] Furthermore, one end of the shell is symmetrically provided with a through groove for installing the fuse assembly, the clamping groove and the through groove are both connected to the installation groove, and one end of the shell is provided with a chamfer.

[0010] Furthermore, a connecting plate is fixedly provided on the top cover, the fuse assembly is located between the two side plates, and open grooves are symmetrically provided on the connecting plate, and the open grooves are correspondingly arranged with the through grooves.

[0011] Furthermore, a partition plate is fixedly provided on the connecting plate and between the two opening grooves, and the protrusion is located between the partition plate and the limiting plate.

[0012] Furthermore, the fuse assembly includes two tuning fork-shaped terminals, a conductive rod is fixedly connected to the terminal, a round block is fixedly provided on the conductive rod, a round block is provided with a round hole, a fusible link is fixedly provided on one side of the round block, two ends of the fusible link are respectively connected to the two round blocks, a groove is provided at the connection between the fusible link and the round block, and a matching groove is opened on the side of the terminal, and the matching groove matches with the protrusion.

[0013] Furthermore, the limit plate is abutted and fixed on the upper end of the terminal, a through slot is provided on the terminal, a fixing slot is provided on the terminal and located on one side of the through slot, a fixing block is fixed on the terminal and located on the other side of the through slot, the fixing block is arranged corresponding to the fixing slot, and an inclined surface is provided at the end of the terminal.

[0014] Beneficial effects of the utility model:

[0015] 1. The utility model fuse adopts a plug-in installation design, which makes the operation simple and convenient during the production and assembly of the fuse, and the internal fuse component is stably installed, the fuse component is reliably fixed, and the use safety of the fuse is improved. The fuse component adopts a double-hole design, so that it can be stably and reliably disconnected in the overcurrent state, ensuring a smooth circuit disconnection process and protecting the equipment in the circuit;

[0016] 2. The utility model fuse is easy to disassemble and assemble. The fuse component in the fuse is simple to assemble. The protrusion is used to position and assemble the fuse component. When the fuse component is actually working, the protrusion and the limit plate can bear the force of the terminal to avoid deformation of the fuse component of the fuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of the fuse of the utility model;

[0019] Figure 2 This is a schematic diagram of the shell structure of the utility model;

[0020] Figure 3 It is a front view of the fuse of the utility model;

[0021] Figure 4 It is a partial structural schematic diagram of the fuse of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the fuse assembly of the utility model;

[0023] Figure 6 It is a front view of the fuse assembly of the utility model. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] A slow blow fuse, such as Figure 1-3 As shown, the fuse includes a shell 1, a top cover 2 is fixedly provided on the shell 1, a mounting groove 10 is provided in the shell 1, symmetrically distributed card grooves 13 are provided on both sides of the shell 1, and a symmetrically distributed through groove 11 is provided at one end of the shell 1, and the mounting groove 10 is connected with the card groove 13 and the through groove 11.

[0026] In this embodiment, a chamfer 12 is provided at one end of the housing 1 to facilitate installation and use of the fuse.

[0027] like Figure 4 As shown, a connecting plate 21 is fixedly provided on the top cover 2, and side plates 22 are fixedly connected to both sides of the connecting plate 21. A clamping block 23 is fixedly provided on the outer side of the side plate 22. When the top cover 2 is inserted into the outer shell 1, the clamping block 23 is fixed in cooperation with the clamping slot 13. A fuse assembly 3 is installed on one side of the connecting plate 21, and the fuse assembly 3 is located between the two side plates 22.

[0028] The connecting plate 21 is provided with symmetrically distributed open grooves 27, which match the through grooves 11, and a partition plate 26 is fixedly provided on the connecting plate 21 and between the two open grooves 27, a protrusion 25 is provided above the partition plate 26, and the protrusion 25 is fastened to the connecting plate 21, and a limit plate 24 is provided above the protrusion 25, and the limit plate 24 is fixedly connected to the connecting plate 21.

[0029] like Figure 5 , Figure 6 As shown, the fuse assembly 3 includes two terminals 33, and the terminals 33 are in a tuning fork structure. A conductive rod 31 is fixedly connected to the two terminals 33. A round block 30 is fixedly provided on the conductive rod 31. A round hole 35 is provided on the round block 30. A fusible link 32 is fixedly provided on one side of the round block 30. The two ends of the fusible link 32 are respectively connected to the two round blocks 30, and a groove 36 is provided at the connection to ensure that the fusible link 33 can be stably disconnected in the case of overcurrent.

[0030] The two terminals 33 of the fuse assembly 3 are located on both sides of the partition plate 26, and the limiting plate 24 abuts against the upper end of the terminal 33 to fix the terminal 33. A matching groove 34 is provided on the side of the terminal 33, and the matching groove 34 cooperates with the protrusion 25. When the terminal 33 of the fuse assembly 3 is assembled with the connecting plate 21, the protrusion 25 and the matching groove 34 are positioned to accurately install the fuse assembly 3 on the connecting plate 21.

[0031] A through slot is provided on the terminal 33, a fixing slot 37 is provided on the terminal 33 and located on one side of the through slot, a fixing block 38 is fixed on the terminal 33 and located on the other side of the through slot, the fixing block 38 is arranged corresponding to the fixing slot 37, and is used to fix the components connected to the terminal 33. An inclined surface 39 is provided at the end of the terminal 33 to facilitate the installation of the terminal 33.

[0032] In this embodiment, the through slot on the terminal 33 is arranged corresponding to the opening slot 27 , and the terminal 33 is installed at the through slot 11 , and the component connected to the terminal 33 enters from the through slot 11 and completes the connection with the terminal 33 .

[0033] Here’s how it works:

[0034] The present fuse is a slow-blow circuit-breaking fuse composed of a fuse component 3 with two holes. When the fuse component 3 is in an overcurrent state, the local currents at symmetrical positions can be made the same, and the resistance stability is good, so that the temperature rise caused by the current is consistent. When the temperature on the fusible link 33 rises to the melting point, the fusible link 33 can be broken, thereby forming an open circuit, so that no current is transmitted between the terminals 33 on the fuse component 3.

[0035] The fuse adopts a plug-in fixing method of the top cover 2 and the outer shell 1, which is convenient for assembly and disassembly. When the internal fuse component 3 is installed, the fuse component 3 is positioned and fixed by the protrusion 25, and then the top cover 2 is inserted into the outer shell 1 to complete the installation and fixing. It is easy to maintain and the fuse component 3 inside the fuse can be replaced. The fixing method is simple and reliable.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A slow blow fuse, comprising a housing (1), characterized in that: The housing (1) is fixedly provided with a top cover (2), two sides of the housing (1) are symmetrically provided with card slots (13), a mounting slot (10) is provided in the housing (1), a connecting plate (21) is provided in the mounting slot (10), and the connecting plate (21) is fixedly connected to the top cover (2); A fuse assembly (3) is fixedly provided on one side of the connecting plate (21), side plates (22) are fixedly connected to both sides of the connecting plate (21), a limiting plate (24) is fixedly connected to the connecting plate (21), a protrusion (25) is fixedly provided on the connecting plate (21), and a clamping block (23) is fixedly provided on the outer side of the side plate (22), and the clamping block (23) cooperates with the clamping slot (13).

2. A slow blow fuse according to claim 1, characterized in that: One end of the housing (1) is symmetrically provided with a through slot (11) for installing the fuse assembly (3); the clamping slot (13) and the through slot (11) are both connected to the installation slot (10); and one end of the housing (1) is provided with a chamfer (12).

3. A slow blow fuse according to claim 2, characterized in that: A connecting plate (21) is fixedly provided on the top cover (2), the fuse assembly (3) is located between two side plates (22), and opening grooves (27) are symmetrically provided on the connecting plate (21), and the opening grooves (27) are arranged correspondingly to the through grooves (11).

4. A slow blow fuse according to claim 3, characterized in that: A partition plate (26) is fixedly provided on the connecting plate (21) and located between the two opening grooves (27), and the protrusion (25) is located between the partition plate (26) and the limiting plate (24).

5. A slow blow fuse according to claim 1, characterized in that: The fuse assembly (3) comprises two tuning fork-shaped terminals (33), a conductive rod (31) being fixedly connected to the terminal (33), a round block (30) being fixedly provided on the conductive rod (31), a round hole (35) being provided on the round block (30), a fusible link (32) being fixedly provided on one side of the round block (30), two ends of the fusible link (32) being respectively connected to the two round blocks (30), a groove (36) being provided at the connection between the fusible link (32) and the round block (30), and a matching groove (34) being provided on the side of the terminal (33), and the matching groove (34) matching with the protrusion (25).

6. A slow blow fuse according to claim 5, characterized in that: The limiting plate (24) is fixedly abutted against the upper end of the terminal (33); a through slot is provided on the terminal (33); a fixing slot (37) is provided on the terminal (33) and located on one side of the through slot; a fixing block (38) is fixedly provided on the terminal (33) and located on the other side of the through slot; the fixing block (38) is arranged corresponding to the fixing slot (37); and an inclined surface (39) is provided at the end of the terminal (33).

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