CN114360981B - Fuse for protecting circuit against fuse core damage - Google Patents

Fuse for protecting circuit against fuse core damage Download PDF

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Publication number
CN114360981B
CN114360981B CN202111578012.9A CN202111578012A CN114360981B CN 114360981 B CN114360981 B CN 114360981B CN 202111578012 A CN202111578012 A CN 202111578012A CN 114360981 B CN114360981 B CN 114360981B
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fixed
fuse
shell
plate
movable
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CN114360981A (en
Inventor
吴雨虹
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Zhejiang Dayou Industrial Co ltd Hangzhou Science And Technology Development Branch
Hangzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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Zhejiang Dayou Industrial Co ltd Hangzhou Science And Technology Development Branch
Hangzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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Publication of CN114360981A publication Critical patent/CN114360981A/en
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Abstract

The invention discloses a fuse for protecting a circuit, which is used for preventing a fuse core from being damaged, and is provided with a shell, wherein a fixing plate is fixed in the shell; the fixed clamping piece is arranged on one side, far away from the binding post, of the partition plate, and a binding post is fixed at the top of the fixed clamping piece; comprising the following steps: the mounting plate is movably mounted in the shell, the fusion pipe is mounted on the inner side of the mounting plate, and a switch handle is arranged at the top of the mounting plate; a limiting through groove is formed in the connecting shell, and an adjusting rod movably penetrates through the connecting shell; the fixed box is fixed on the upper end face of the fixed plate, a piston plate is movably arranged in the fixed box, and a guide shaft is fixed on the side face of the piston plate. This prevent fuse for circuit protection that fuse is impaired need not to fuse the fuse after the circuit breaks down and can realize the disconnection of circuit to after the circuit is stable, can realize the reconnection to the circuit fast, and then guarantee the integrality of fuse.

Description

Fuse for protecting circuit against fuse core damage
Technical Field
The invention relates to the technical field of power electrical equipment, in particular to a fuse for protecting a circuit, which is used for preventing a fuse core from being damaged.
Background
The power equipment is divided into power generation equipment and power transmission equipment, and according to the difference that plays the effect when using, the fuse is electric power primary equipment, play the function of connecting and breaking circuit, therefore the fuse has fine circuit protection effect, for example the fuse that has the radiating effect of publication No. CN205159274U, including the casing … has solved the problem of often changing the core, not only practiced thrift the cost, protect carrying the fuse-element moreover, reduced the friction between carrying fuse-element and the casing, through the installation to the inflation ball, inflation ball grow and prop up carrying fuse-element, circuit outage protection circuit, can dispel partial heat. However, the fuse with heat dissipation effect still has the following disadvantages in the actual use process:
1. in the use process of the traditional fuse, the circuit can be disconnected only by fusing the fuse core, and the fused fuse core can be disconnected again only by replacing the fused fuse core, so that the production cost of the fuse core is increased, and the complexity of the fuse core replacing step is increased;
2. and after the circuit is disconnected, the part of the fuse protector protects the fuse core in a cooling mode, so that the reuse of the fuse core is realized, but the fuse core is damaged to a certain extent, the fuse core is still fused after repeated for a plurality of times, and the instability of current conveying can be caused.
Aiming at the problems, innovative design is urgently needed on the basis of the original fuse.
Disclosure of Invention
The invention aims to provide a fuse for protecting a circuit, which is used for preventing a fuse from being damaged, so as to solve the problems that the circuit can be disconnected only by fusing the fuse in the background technology, the circuit can be disconnected again only by replacing the fused fuse, the fuse is protected by adopting a cooling mode, and the fuse is reused, but the fuse is damaged to a certain extent.
In order to achieve the above purpose, the present invention provides the following technical solutions: the fuse for protecting the circuit, which is used for preventing the fuse core from being damaged, is provided with a shell, wherein a fixed plate is fixed in the shell, binding posts are arranged at two ends of the fixed plate, and a separation plate is arranged at the side of each binding post;
the fixed clamping piece is arranged on one side, far away from the binding post, of the partition plate, a binding post is fixed at the top of the fixed clamping piece, and a melting pipe is movably arranged on the inner side of the binding post;
comprising the following steps:
the mounting plate is movably mounted in the shell, the fusion pipe is mounted on the inner side of the mounting plate, the outer side of the mounting plate is rotationally connected with the inner wall of the shell through a supporting shaft, a switch handle is arranged at the top of the mounting plate, a connecting shell is arranged below the switch handle, and the connecting shell is fixed at the top of the shell;
a limiting through groove is formed in the connecting shell, a supporting seat is fixed on the inner side of the limiting through groove, a first spring is arranged on the side face of the supporting seat, an adjusting rod penetrates through the connecting shell actively, and a second spring is wound on the outer side of the adjusting rod;
the fixed box is fixed on the upper end face of the fixed plate, a piston plate is movably arranged in the fixed box, a guide shaft is fixed on the side face of the piston plate, another second spring is wound on the outer side of the guide shaft, and meanwhile the end head of the guide shaft is movably connected with the bottom of the movable rod.
Preferably, the top of division board has seted up the inlet port, and the avris of inlet port has pasted the inflation gasbag to the side of inflation gasbag and the one end fixed connection of gas-supply pipe, the other end of gas-supply pipe and the inside intercommunication of fixed box simultaneously, when the cavity heat that the terminal was located increases, can drive inflation gasbag inflation, just so collect the hot air at inflation gasbag position and just can get into inside the fixed box through the gas-supply pipe.
Preferably, the connecting plates are fixed at the two ends of the melting pipe, an insulating pad is stuck on one side, close to the connecting terminals, of the connecting plates, the sections of the connecting plates and the insulating pad are arc-shaped structures, and simultaneously arc centers of the connecting plates and the melting pipe coincide with the rotating circle centers of the melting pipe, so that the connecting plates can be driven to synchronously rotate when the melting pipe rotates, the insulating pad is driven to be positioned between 2 connecting terminals, and further insulation after a circuit is disconnected is realized.
Preferably, the top of supporting seat rotates there is the movable block, and the up end of movable block is the inclined plane setting to first spring setting is between movable block and supporting seat, and the top of movable block is fixed with the fixed block perpendicularly simultaneously, and after the switch handle card was put in spacing logical inslot side, the accessible movable block was put in spacing to the switch handle, and the switch handle can not rotate out from spacing logical inslot side by oneself like this.
Preferably, the adjusting rod and the connecting shell are in sliding connection, the connecting block is fixedly connected to the end of the adjusting rod, the width of the switch handle is smaller than that of the limiting through groove, and the connecting block can be driven to synchronously move after the adjusting rod is pulled, so that the limiting of the fixed block can be relieved, and the movable block can reversely rotate.
Preferably, the arc center of the connecting block coincides with the rotation center of the movable block, the highest point of the connecting block is lower than the highest point of the fixed block, the arc surface end of the movable block and the connecting block are in fit sliding, when the switch handle is in contact with the movable block, the switch handle can be driven to rotate downwards, and the movable block can be prevented from rotating upwards through the contact of the connecting block and the fixed block, so that the stability of the switch handle after clamping is ensured.
Preferably, one end of the guide shaft is in sliding connection with the fixed box, the other end of the guide shaft forms a sliding structure through the movable groove and the movable rod, the movable groove is formed in the bottom of the movable rod, meanwhile, the movable rod is rotationally connected with the inner wall of the shell through the movable shaft, after hot air enters the fixed box, the piston plate can be pushed to move, the movable rod is pulled to rotate through the guide shaft, and the end of the guide shaft can slide in the movable groove and rotate.
Preferably, the top fixedly connected with joint piece of movable rod, and reserved the spacing groove on the mounting panel in joint piece outside to joint piece and spacing groove are anastomotic connection, can drive joint piece and spacing groove separation after the movable rod rotates, and then realize the rotation of mounting panel drive fusion tube, and when the movable rod resumes vertical state, reverse rotation mounting panel can realize that the spacing groove coincide with the joint piece again.
Compared with the prior art, the invention has the beneficial effects that: this prevent melting impaired circuit protection of core and use fuse, after the circuit breaks down, need not to melt the core and fuse the disconnection that can realize the circuit to after the circuit is stable, can realize the reconnection to the circuit fast, and then guarantee the integrality of melting the core, the concrete content is as follows:
1. when hot air collected at the position of the expansion air bag enters the fixed box through the air pipe, the piston plate can be pushed to move, the guide shaft pulls the movable rod to rotate, and the guide shaft and the movable groove can rotate and slide, so that the clamping block can be driven to be separated from the limiting groove after the movable rod is pulled to rotate, and the mounting plate and the fusion pipe can be driven to rapidly rotate to an inclined state through the elasticity of the first spring on the supporting shaft, and the circuit is disconnected;
2. after the circuit is stabilized, the piston plate drives the guide shaft to pull the movable rod to rotate to restore the original position, the movable rod is in a state perpendicular to the guide shaft, and the clamping block and the limiting groove can be clamped again by reversely rotating the mounting plate, so that the stability of the circuit connection state is ensured;
3. can drive the synchronous rotation of switch handle when the mounting panel rotates to the switch handle can be with movable block contact, promotes the movable block and rotates, through the conflict of connecting block to the fixed block, can avoid the movable block to appear reverse pivoted phenomenon, can carry out spacingly to the switch handle that is in spacing logical inslot through the movable block like this, prevent that the switch handle from rotating out, follow-up pulling adjusts the pole and drives connecting block and fixed block separation, can realize that the movable block upwards rotates, and then realizes that the mounting panel drives the fusion tube and be connected with binding post again.
Drawings
FIG. 1 is a schematic view of the present invention in a front cross-section;
FIG. 2 is a schematic illustration of the front cross-sectional structure of the separator plate of the present invention;
FIG. 3 is a schematic view of the front cross-section of the fixing case of the present invention;
FIG. 4 is a schematic diagram showing a cross-sectional structure of the portion A in FIG. 1 according to the present invention;
FIG. 5 is a schematic view of the structure of the mounting plate of the present invention after rotation;
FIG. 6 is a schematic side view of the mounting plate of the present invention;
FIG. 7 is a schematic side view of a connection housing of the present invention;
fig. 8 is a schematic side view of the movable block of the present invention.
In the figure: 1. a housing; 2. a fixing plate; 3. binding posts; 4. a partition plate; 41. an air inlet hole; 42. inflating the balloon; 43. a gas pipe; 5. a fixing clip; 6. a connection terminal; 7. a fusion pipe; 71. a connecting plate; 72. an insulating pad; 8. a mounting plate; 81. a limit groove; 82. a support shaft; 9. a switch handle; 10. a connection housing; 11. limiting through grooves; 12. a support base; 121. a movable block; 122. a fixed block; 13. a first spring; 14. an adjusting rod; 15. a second spring; 16. a connecting block; 17. a fixed box; 18. a piston plate; 19. a guide shaft; 20. a movable rod; 201. a movable groove; 202. a clamping block; 21. a movable shaft.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-8, the present invention provides a technical solution: a fuse for protecting a circuit against damage of a fuse core is provided with a housing 1, a fixed plate 2 is fixed in the housing 1, binding posts 3 are arranged at two ends of the fixed plate 2, and a partition plate 4 is arranged at the side of the binding posts 3; the fixed clamping piece 5 is arranged on one side of the partition plate 4 far away from the binding post 3, the top of the fixed clamping piece 5 is fixedly provided with a binding post 6, and the inner side of the binding post 6 is movably provided with a fusion pipe 7;
comprising the following steps: the mounting plate 8 is movably mounted in the shell 1, the fusion pipe 7 is mounted on the inner side of the mounting plate 8, the outer side of the mounting plate 8 is rotationally connected with the inner wall of the shell 1 through the supporting shaft 82, the top of the mounting plate 8 is provided with the switch handle 9, the lower part of the switch handle 9 is provided with the connecting shell 10, and the connecting shell 10 is fixed on the top of the shell 1; a limit through groove 11 is formed in the connecting shell 10, a supporting seat 12 is fixed on the inner side of the limit through groove 11, a first spring 13 is arranged on the side surface of the supporting seat 12, an adjusting rod 14 is movably penetrated in the connecting shell 10, and a second spring 15 is wound on the outer side of the adjusting rod 14; the fixed box 17 is fixed on the upper end face of the fixed plate 2, a piston plate 18 is movably arranged in the fixed box 17, a guide shaft 19 is fixed on the side face of the piston plate 18, another second spring 15 is wound on the outer side of the guide shaft 19, and meanwhile, the end of the guide shaft 19 is movably connected with the bottom of the movable rod 20.
As shown in fig. 1-2, the top of the partition plate 4 is provided with an air inlet 41, the side of the air inlet 41 is stuck with an expansion air bag 42, the side surface of the expansion air bag 42 is fixedly connected with one end of the air pipe 43, the other end of the air pipe 43 is communicated with the inside of the fixed box 17, when a circuit fails, a large amount of heat is generated in a cavity where the binding post 3 is located, the expansion air bag 42 expands after being heated, and thus, hot air collected at the expansion air bag 42 can enter the fixed box 17 through the air pipe 43;
as shown in fig. 4-5, connecting plates 71 are fixed at two ends of the fusion tube 7, an insulating pad 72 is stuck to one side of the connecting plates 71 close to the wiring terminal 6, the sections of the connecting plates 71 and the insulating pad 72 are arc structures, and the arc centers of the connecting plates coincide with the rotation circle centers of the fusion tube 7, when the mounting plate 8 drives the fusion tube 7 to rotate, the circuit can be disconnected, and the connecting plates 71 can be driven to synchronously rotate in the rotation process of the fusion tube 7, and the insulating pad 72 is driven to be positioned between the fusion tube 7 and the wiring terminal 6, so that the insulation effect is further achieved;
as shown in fig. 1 and 7-8, the top of the supporting seat 12 rotates to form a movable block 121, the upper end surface of the movable block 121 is inclined, a first spring 13 is arranged between the movable block 121 and the supporting seat 12, meanwhile, a fixed block 122 is vertically fixed at the top of the movable block 121, the rotated mounting plate 8 can drive the switch handle 9 to synchronously rotate, so that the switch handle 9 can be clamped into the limit through groove 11 and is contacted with the movable block 121 to push the movable block 121 to rotate, the movable block 121 downwards rotates to facilitate the contact between the switch handle 9 and the limit through groove 11, and the movable block 121 downwards rotates to drive the movable block 121 to reversely rotate to a horizontal state through the rebound resilience of the first spring 13, and at the moment, the movable block 121 can be limited by the interference between the connecting block 16 and the fixed block 122 to prevent the movable block 121 from upwards rotating, so that the switch handle 9 can be ensured to be positioned in the limit through groove 11; the adjusting rod 14 is in sliding connection with the connecting shell 10, a connecting block 16 is fixedly connected at the end of the adjusting rod 14, and the width of the switch handle 9 is smaller than that of the limiting through groove 11; the arc center of the connecting block 16 coincides with the rotation center of the movable block 121, the highest point of the connecting block 16 is lower than the highest point of the fixed block 122, the arc surface end of the movable block 121 and the connecting block 16 are in joint sliding, when a circuit needs to be reconnected, the adjusting rod 14 is pulled to slide in the connecting shell 10, the second spring 15 on the connecting shell 10 is driven to be compressed, and the connecting block 16 and the fixed block 122 are driven to be separated, so that the movable block 121 can rotate upwards, the limitation on the switch handle 9 is removed, the mounting plate 8 is driven to rotate by rotating the switch handle 9, and the reconnection of the fusion tube 7 and the wiring terminal 6 is realized;
as shown in fig. 1, 3 and 6, one end of the guide shaft 19 is in sliding connection with the fixed box 17, the other end of the guide shaft 19 forms a sliding structure through the movable groove 201 and the movable rod 20, the movable groove 201 is arranged at the bottom of the movable rod 20, meanwhile, the movable rod 20 is rotationally connected with the inner wall of the shell 1 through the movable shaft 21, when hot air enters the fixed box 17, the piston plate 18 can be pushed to move so as to drive the guide shaft 19 to synchronously move, and the movable rod 20 is pulled to rotate through the movable shaft 21, the guide shaft 19 can slide and rotate in the movable groove 201, so that after the movable rod 20 rotates, the clamping block 202 can be driven to be separated from the limiting groove 81, and the mounting plate 8 can be driven to rotate to an inclined state through the rebound of the first spring 13 on the support shaft 82, and the circuit is disconnected; the top fixedly connected with joint piece 202 of movable rod 20, and reserve the spacing groove 81 on the mounting panel 8 in joint piece 202 outside, and joint piece 202 and spacing groove 81 are anastomotic connection, when the circuit resumes normal time, the inside heat of casing 1 resumes normal value, gas-supply pipe 43 stops carrying the steam like this, through the resilience of second spring 15 on the guide shaft 19, can drive piston plate 18 and guide shaft 19 and resume the normal position, movable rod 20 rotates to vertical state this moment, again when rotating mounting panel 8 in the opposite direction to the horizontality, can realize the re-engagement of spacing groove 81 and joint piece 202, guarantee the stability after the circuit switch-on.
Working principle: as shown in fig. 1-8, when the circuit fails, a large amount of heat is generated in the cavity where the binding post 3 is located, and the heat drives the expansion air bag 42 to expand at first, so that hot air collected at the expansion air bag 42 can enter the fixed box 17 through the air pipe 43, further pushes the piston plate 18 to move, drives the guide shaft 19 to synchronously move and pull the movable rod 20 to rotate, and can drive the clamping block 202 to be separated from the limiting groove 81, and the first spring 13 on the support shaft 82 can drive the mounting plate 8 and the fusion pipe 7 to rotate, so that the circuit is cut off;
the mounting panel 8 rotates and can drive the synchronous rotation of switch handle 9 to contact with movable block 121 and drive it and rotate, through the conflict between connecting block 16 and the fixed block 122, can avoid movable block 121 to upwards rotate, can carry out spacing to the position of switch handle 9 like this, after the later stage pulling adjusts pole 14 and drives connecting block 16 and fixed block 122 separation, just can realize movable block 121 upwards rotate, realize that fusion tube 7 and binding post 6's reconnection, and then avoided fusion tube 7 to receive the damage, so that realize the cyclic utilization.
In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.

Claims (2)

1. The fuse for protecting the circuit, which is used for preventing the fuse core from being damaged, is provided with a shell (1), a fixed plate (2) is fixed in the shell (1), binding posts (3) are arranged at two ends of the fixed plate (2), and a separation plate (4) is arranged at the side of each binding post (3);
the fixing clamping piece (5) is arranged on one side, far away from the binding post (3), of the partition plate (4), a binding post (6) is fixed at the top of the fixing clamping piece (5), and a melting pipe (7) is movably arranged on the inner side of the binding post (6);
characterized by comprising the following steps:
the mounting plate (8) is movably mounted in the shell (1), the fusion pipe (7) is mounted on the inner side of the mounting plate (8), the outer side of the mounting plate (8) is rotationally connected with the inner wall of the shell (1) through the supporting shaft (82), the top of the mounting plate (8) is provided with the switch handle (9), the connecting shell (10) is arranged below the switch handle (9), and the connecting shell (10) is fixed on the top of the shell (1);
a limiting through groove (11) is formed in the connecting shell (10), a supporting seat (12) is fixed on the inner side of the limiting through groove (11), a first spring (13) is arranged on the side face of the supporting seat (12), an adjusting rod (14) movably penetrates through the connecting shell (10), and a second spring (15) is wound on the outer side of the adjusting rod (14);
the fixed box (17) is fixed on the upper end face of the fixed plate (2), a piston plate (18) is movably arranged in the fixed box (17), a guide shaft (19) is fixed on the side face of the piston plate (18), another second spring (15) is wound on the outer side of the guide shaft (19), and meanwhile the end of the guide shaft (19) is movably connected with the bottom of the movable rod (20);
an air inlet hole (41) is formed in the top of the partition plate (4), an expansion air bag (42) is stuck to the side of the air inlet hole (41), the side face of the expansion air bag (42) is fixedly connected with one end of the air pipe (43), and the other end of the air pipe (43) is communicated with the inside of the fixed box (17);
the top of the supporting seat (12) is rotated with a movable block (121), the upper end surface of the movable block (121) is an inclined surface, a first spring (13) is arranged between the movable block (121) and the supporting seat (12), and meanwhile, the top of the movable block (121) is vertically fixed with a fixed block (122);
the adjusting rod (14) is in sliding connection with the connecting shell (10), a connecting block (16) is fixedly connected to the end of the adjusting rod (14), and the width of the switch handle (9) is smaller than that of the limiting through groove (11);
the arc center of the connecting block (16) is coincident with the rotation center of the movable block (121), the highest point of the connecting block (16) is lower than the highest point of the fixed block (122), and the arc surface end of the movable block (121) is in fit sliding with the connecting block (16);
one end of the guide shaft (19) is in sliding connection with the fixed box (17), the other end of the guide shaft (19) forms a sliding structure through the movable groove (201) and the movable rod (20), the movable groove (201) is formed in the bottom of the movable rod (20), and meanwhile the movable rod (20) is in rotary connection with the inner wall of the shell (1) through the movable shaft (21);
the top of movable rod (20) fixedly connected with joint piece (202), and reservation has spacing groove (81) on mounting panel (8) in joint piece (202) outside to joint piece (202) and spacing groove (81) are the anastomotic joint.
2. The fuse for circuit protection against fuse core damage of claim 1, wherein: the two ends of the fusion tube (7) are both fixed with connecting plates (71), one side, close to the connecting terminal (6), of each connecting plate (71) is stuck with an insulating pad (72), the sections of the connecting plates (71) and the insulating pads (72) are arc-shaped structures, and meanwhile, the arc centers of the connecting plates and the insulating pads are coincident with the rotation circle centers of the fusion tube (7).
CN202111578012.9A 2021-12-22 2021-12-22 Fuse for protecting circuit against fuse core damage Active CN114360981B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111578012.9A CN114360981B (en) 2021-12-22 2021-12-22 Fuse for protecting circuit against fuse core damage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111578012.9A CN114360981B (en) 2021-12-22 2021-12-22 Fuse for protecting circuit against fuse core damage

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CN114360981A CN114360981A (en) 2022-04-15
CN114360981B true CN114360981B (en) 2023-12-01

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205159274U (en) * 2015-11-02 2016-04-13 乐清市永信熔断器厂 Fuse with radiating effect
CN109921376A (en) * 2019-04-08 2019-06-21 曹文保 Automatic recovery type power fuse
CN110752126A (en) * 2019-10-30 2020-02-04 彭博 Circuit overload protection and automatic resetting device
CN112053904A (en) * 2020-09-28 2020-12-08 周邦权 Reusable safe energy-saving fuse for power protection

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105097379B (en) * 2014-05-16 2017-11-17 北京人民电器厂有限公司 The fuse of more fuse-links

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205159274U (en) * 2015-11-02 2016-04-13 乐清市永信熔断器厂 Fuse with radiating effect
CN109921376A (en) * 2019-04-08 2019-06-21 曹文保 Automatic recovery type power fuse
CN110752126A (en) * 2019-10-30 2020-02-04 彭博 Circuit overload protection and automatic resetting device
CN112053904A (en) * 2020-09-28 2020-12-08 周邦权 Reusable safe energy-saving fuse for power protection

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