阅读说明：本技术 一种自动更换熔断丝的安全断路器 (Safety circuit breaker capable of automatically replacing fuse ) 是由 赵立杰 于 2021-01-26 设计创作，主要内容包括：本发明公开了一种自动更换熔断丝的安全断路器,包括工作箱,所述工作箱中设有熔断腔,所述工作箱中固定设有第一电线,所述工作箱中固定设有第二电线,所述第一电线、第二电线间固定连接设有绝缘块,所述第一电线、第二电线上左右对称固定设有两个固定环,本设备在电路发生短路时,通过熔断丝产生高温,自动将熔断丝熔断,从而造成电路断路,切断电源,达到保护电路的作用,在熔断丝熔断时跳闸腔内自动跳闸,断开电路间的连接,同时自动将熔断的熔断丝去除,更换上新的熔断丝,在用户检查处理完短路原因后,手动将跳闸腔内电路进行连接,节约了熔断丝重新安装的时间,同时避免了在安装熔断丝时存在的安全隐患。(The invention discloses a safety circuit breaker capable of automatically replacing a fuse wire, which comprises a working box, wherein a fuse cavity is arranged in the working box, a first electric wire is fixedly arranged in the working box, a second electric wire is fixedly arranged in the working box, an insulating block is fixedly connected between the first electric wire and the second electric wire, and two fixing rings are symmetrically and fixedly arranged on the first electric wire and the second electric wire left and right, when a circuit is short-circuited, the device can automatically fuse the fuse wire through the fuse wire to break the circuit and cut off the power supply to achieve the effect of protecting the circuit, when the fuse wire is fused, the circuit in the trip cavity is automatically tripped to break the connection between the circuits, meanwhile, the fused fuse wire is automatically removed, a new fuse wire is replaced, and after a user checks and processes the short-circuit reason, the circuit in the trip cavity is manually connected, so that the time for reinstallation of the fuse wire is saved, meanwhile, the potential safety hazard existing in the process of installing the fuse is avoided.)

1. The utility model provides an automatic change safety circuit breaker of fusible link, includes the work box, be equipped with the fusing chamber in the work box, the fixed first electric wire that is equipped with in the work box, the fixed second electric wire that is equipped with in the work box, fixed connection is equipped with the insulating block between first electric wire, second electric wire, bilateral symmetry is fixed on first electric wire, the second electric wire is equipped with two solid fixed rings, its characterized in that: the first electric wire and the second electric wire are fixedly provided with two conducting rings in bilateral symmetry, the lower end of a fixing ring on the left side is fixedly provided with a first ejector rod, the lower end of the first ejector rod is fixedly provided with a contact sensor, the rear wall of the fusing cavity is fixedly provided with a linkage block, two linkage sliding grooves with forward openings are symmetrically arranged in the linkage block in the bilateral symmetry mode, a linkage sliding block is arranged in the linkage sliding grooves in a sliding mode, a sliding block spring is connected between the linkage sliding block and the top wall of the linkage sliding grooves, the front end of the linkage sliding block is fixedly provided with a fixing column, the front end of the fixing column is fixedly provided with a conducting frame, and a first conducting ring is connected between the upper end of;

the lower end of the conductive frame is fixedly provided with a fuse wire mounting ring, conductive brushes are distributed on the inner ring wall of the fuse wire mounting ring, the left end of the fuse mounting ring is symmetrically and fixedly provided with two spring plates from top to bottom, the fuse mounting ring is symmetrically provided with two hinge grooves from top to bottom, a hinge shaft is rotatably arranged on the rear wall of the hinge groove, a hinge conductive plate is fixedly arranged on the hinge shaft, a connecting spring is connected between the upper end of the hinged conductive plate and the lower end of the spring plate, two fixed blocks which are symmetrical up and down are fixedly arranged at the right end of the fuse mounting ring, the right ends of the two fixed blocks are fixedly connected with a limiting ring, a limiting groove which penetrates through the limiting ring from left to right is arranged in the limiting ring, the limiting ring is characterized in that four limiting sliding grooves are formed in the limiting ring in an annular array mode, a limiting clamping block is arranged in each limiting sliding groove in a sliding mode, and a limiting spring is connected between the upper end of each limiting clamping block and the top wall of each limiting sliding groove.

2. A safety circuit breaker for automatically replacing a fuse according to claim 1, characterized in that: the winding mechanism is characterized in that a pulley cavity is arranged in the linkage block, pulley rotating shafts are symmetrically and rotatably arranged on the rear wall of the pulley cavity in a bilateral-symmetry mode, fixed pulleys are fixedly arranged on the pulley rotating shafts, a winding motor is fixedly arranged at the upper end of the linkage block, a winding rotating shaft is rotatably arranged at the front end of the winding motor, a winding disc is fixedly arranged on the winding rotating shaft, two sliding block pull ropes are wound on the winding disc, and the sliding block pull ropes are respectively wound on the two fixed pulleys and fixedly connected to the linkage sliding block.

3. A safety circuit breaker for automatically replacing a fuse according to claim 1, characterized in that: a limiting cylinder is fixedly arranged at the lower end of the fixing ring on the right side, a limiting sliding groove with a downward opening is formed in the limiting cylinder, a second ejector rod is arranged in the limiting sliding groove in a vertically sliding mode, a limiting spring is connected between the upper end of the second ejector rod and the top wall of the limiting sliding groove, a fixing plate is fixedly arranged at the right end of the second ejector rod, a tripping cavity is arranged in the work box, a third electric wire is fixedly arranged on the right wall of the tripping cavity, a binding post is fixedly arranged at the left end of the third electric wire, and a conductive connecting block is fixedly arranged at the;

the tripping operation chamber top wall is provided with a friction pull rod in a friction sliding mode, the lower end of the friction pull rod is fixedly provided with an insulating plate, the lower end of the insulating plate is connected with the bottom wall of the tripping operation chamber and is provided with a connecting telescopic rod and a top plate spring, a conductive block is fixedly arranged on the insulating plate, a conductive sliding chute with a downward opening is arranged in the conductive connecting block, the conductive block is arranged in the conductive sliding chute in a sliding mode, two lug clamping grooves are symmetrically and fixedly arranged on the front wall and the rear wall of the conductive sliding chute, two conductive elastic lugs are symmetrically and fixedly arranged on the conductive block in a front-back mode, and the conductive elastic.

4. A safety circuit breaker for automatically replacing a fuse according to claim 1, characterized in that: the fuse cavity and the tripping cavity are communicated with each other to form a communicating groove, a rotating shaft is rotatably arranged on the rear wall of the communicating groove, a linkage plate is fixedly arranged on the rotating shaft, and a second conducting is connected between the conducting block and the second wire.

5. A safety circuit breaker for automatically replacing a fuse according to claim 1, characterized in that: the fuse wire storage tank is characterized in that two collecting tanks are fixedly arranged on the bottom wall of the fuse cavity in a bilateral symmetry mode, feeding grooves are formed in the rear wall of the fuse cavity in a communicated mode, fuse wire storage tanks are arranged in the rear wall of the fuse cavity in a communicated mode, push plates are arranged in the fuse wire storage tanks in a sliding mode, push plates are arranged at the rear ends of the push plates and the rear wall of the fuse wire storage tanks in a sliding mode, push plate springs are connected and arranged on the rear walls of the fuse wire storage tanks in a connected mode, fuse wires are arranged in the fuse wire storage tanks in a sliding mode, electric telescopic rods are fixedly arranged on the rear walls of the feeding grooves, elastic feeding grooves are fixedly arranged at the front ends of the electric telescopic rods, limiting plate sliding grooves are fixedly arranged at the upper ends of the elastic feeding grooves, limiting plates are.

6. A safety circuit breaker for automatically replacing a fuse according to claim 1, characterized in that: the conducting ring, the first conducting frame, the fuse mounting ring, the hinge shaft, the hinged conducting plate, the conducting brush, the second conducting block, the conducting elastic lug, the conducting connecting block and the binding post are all made of conducting materials, and the elastic feeding groove is made of elastic materials.

Technical Field

The invention relates to a safety circuit breaker capable of automatically replacing a fuse wire, and mainly relates to the technical field of conductive equipment.

Background

The circuit breaker in daily life usually makes the fuse generate high temperature through short circuit during the short circuit to make the fuse within the specified time, finally cause the circuit to break, after the fuse fuses, need artifical reinstallation fuse, have certain risk, when uncertain fuse installation position whether circular telegram or forget to detect the circular telegram condition of fuse installation position, the incident of electric shock takes place easily, so design this equipment and solve above-mentioned problem.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a safety circuit breaker capable of automatically replacing a fuse, and the safety circuit breaker is used for solving the problem.

The invention is realized by the following technical scheme.

The invention relates to a safety circuit breaker capable of automatically replacing a fuse wire, which comprises a working box, wherein a fuse cavity is arranged in the working box, a first electric wire is fixedly arranged in the working box, a second electric wire is fixedly arranged in the working box, an insulating block is fixedly connected between the first electric wire and the second electric wire, two fixing rings are fixedly arranged on the first electric wire and the second electric wire in a bilateral symmetry manner, two conducting rings are fixedly arranged on the first electric wire and the second electric wire in a bilateral symmetry manner, a first ejector rod is fixedly arranged at the lower end of the fixing ring on the left side, a contact sensor is fixedly arranged at the lower end of the first ejector rod, a linkage block is fixedly arranged on the rear wall of the fuse cavity, two linkage chutes with forward openings are symmetrically arranged in the linkage block in the bilateral symmetry manner, a linkage slide block is slidably arranged in the linkage chutes, and a slide block spring is connected between the linkage slide block, a fixed column is fixedly arranged at the front end of the linkage sliding block, a conductive frame is fixedly arranged at the front end of the fixed column, and a first conductor is connected between the upper end of the conductive frame and the conductive ring on the corresponding side;

the lower end of the conductive frame is fixedly provided with a fuse wire mounting ring, conductive brushes are distributed on the inner ring wall of the fuse wire mounting ring, the left end of the fuse mounting ring is symmetrically and fixedly provided with two spring plates from top to bottom, the fuse mounting ring is symmetrically provided with two hinge grooves from top to bottom, a hinge shaft is rotatably arranged on the rear wall of the hinge groove, a hinge conductive plate is fixedly arranged on the hinge shaft, a connecting spring is connected between the upper end of the hinged conductive plate and the lower end of the spring plate, two fixed blocks which are symmetrical up and down are fixedly arranged at the right end of the fuse mounting ring, the right ends of the two fixed blocks are fixedly connected with a limiting ring, a limiting groove which penetrates through the limiting ring from left to right is arranged in the limiting ring, the limiting ring is characterized in that four limiting sliding grooves are formed in the limiting ring in an annular array mode, a limiting clamping block is arranged in each limiting sliding groove in a sliding mode, and a limiting spring is connected between the upper end of each limiting clamping block and the top wall of each limiting sliding groove.

Further, be equipped with the pulley chamber in the linkage piece, bilateral symmetry rotation is equipped with the pulley pivot on the pulley chamber rear wall, the fixed pulley that is equipped with in the pulley pivot, the fixed winding motor that is equipped with in linkage piece upper end, the rotatory winding pivot that is equipped with of winding motor front end, the fixed coiling dish that is equipped with in the winding pivot, the coiling is equipped with two slider stay cords on the coiling dish, the slider stay cord is walked around respectively two fixed pulley fixed connection be in on the linkage slider.

Furthermore, a limiting cylinder is fixedly arranged at the lower end of the fixing ring on the right side, a limiting sliding groove with a downward opening is formed in the limiting cylinder, a second ejector rod is arranged in the limiting sliding groove in a vertically sliding mode, a limiting spring is connected between the upper end of the second ejector rod and the top wall of the limiting sliding groove, a fixing plate is fixedly arranged at the right end of the second ejector rod, a tripping cavity is arranged in the work box, a third electric wire is fixedly arranged on the right wall of the tripping cavity, a binding post is fixedly arranged at the left end of the third electric wire, and a conductive connecting block is fixedly arranged at the lower end;

the tripping operation chamber top wall is provided with a friction pull rod in a friction sliding mode, the lower end of the friction pull rod is fixedly provided with an insulating plate, the lower end of the insulating plate is connected with the bottom wall of the tripping operation chamber and is provided with a connecting telescopic rod and a top plate spring, a conductive block is fixedly arranged on the insulating plate, a conductive sliding chute with a downward opening is arranged in the conductive connecting block, the conductive block is arranged in the conductive sliding chute in a sliding mode, two lug clamping grooves are symmetrically and fixedly arranged on the front wall and the rear wall of the conductive sliding chute, two conductive elastic lugs are symmetrically and fixedly arranged on the conductive block in a front-back mode, and the conductive elastic.

Furthermore, a communicating groove is formed between the fusing cavity and the tripping cavity in a communicating mode, a rotating shaft is rotatably arranged on the rear wall of the communicating groove, a linkage plate is fixedly arranged on the rotating shaft, and a second conducting is connected between the conducting block and the second wire.

Furthermore, the fuse cavity bottom wall is fixed with two collecting grooves in a bilateral symmetry mode, the fuse cavity rear wall is communicated with a feeding groove, the upper end of the feeding groove is communicated with a fuse wire storage groove formed in the fuse cavity rear wall, a push plate is arranged in the fuse wire storage groove in a sliding mode, a push plate spring is connected and arranged at the rear end of the push plate and on the fuse wire storage groove rear wall, a fuse wire is arranged in the fuse wire storage groove in a sliding mode, an electric telescopic rod is fixedly arranged on the feeding groove rear wall, an elastic feeding groove is fixedly arranged at the front end of the electric telescopic rod, a limiting plate sliding groove is fixedly arranged at the upper end of the elastic feeding groove, a limiting plate is arranged on the feeding groove rear wall in a communicating mode, and the limiting plate sliding groove is arranged in the limiting plate in a sliding mode.

Further, the conducting ring, the first conducting body, the conducting frame, the fuse mounting ring, the hinge shaft, the hinge conducting plate, the conducting brush, the second conducting body, the conducting block, the conducting elastic lug, the conducting connecting block and the binding post are all made of conducting materials, and the elastic feeding groove is made of elastic materials.

The invention has the beneficial effects that: this equipment is when the short circuit takes place for the circuit, produce high temperature through the fuse, fuse automatically, thereby cause the circuit to open circuit, the power supply is cut off, reach protection circuit's effect, tripping operation intracavity automatic tripping operation when the fuse fuses, break off the connection between the circuit, the fuse that fuses is got rid of automatically simultaneously, change new fuse, after the short circuit reason has been handled in the user's inspection, the manual intracavity circuit that will trip is connected, the time of fuse reinstallation has been practiced thrift, the potential safety hazard that exists when installing the fuse has been avoided simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic diagram of the structure at a in fig. 1.

Fig. 3 is a schematic diagram of the structure at B in fig. 1.

FIG. 4 is a schematic view of the structure at C-C in FIG. 1.

FIG. 5 is a schematic view of the structure at D-D in FIG. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-5, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The safety circuit breaker with automatic fuse replacement function, which is described in conjunction with fig. 1-5, comprises a working box 10, a fuse cavity 11 is arranged in the working box 10, a first electric wire 12 is fixedly arranged in the working box 10, a second electric wire 16 is fixedly arranged in the working box 10, an insulating block 17 is fixedly connected between the first electric wire 12 and the second electric wire 16, two fixing rings 13 are fixedly arranged on the first electric wire 12 and the second electric wire 16 in a bilateral symmetry manner, two conducting rings 18 are fixedly arranged on the first electric wire 12 and the second electric wire 16 in a bilateral symmetry manner, a first ejector rod 14 is fixedly arranged at the lower end of the fixing ring 13 at the left side, a contact sensor 15 is fixedly arranged at the lower end of the first ejector rod 14, a linkage block 20 is fixedly arranged on the rear wall of the fuse cavity 11, two linkage chutes 21 with forward openings are arranged in the linkage block 20 in a bilateral symmetry manner, a linkage slider 22 is slidably arranged in the linkage chute 21, a slider spring 25 is connected between the linkage slider 22 and the top wall of the linkage sliding chute 21, a fixed column 23 is fixedly arranged at the front end of the linkage slider 22, a conductive frame 24 is fixedly arranged at the front end of the fixed column 23, and a first conductive 19 is connected between the upper end of the conductive frame 24 and the conductive ring 18 on the corresponding side;

a fuse wire mounting ring 33 is fixedly arranged at the lower end of the conductive frame 24, conductive brushes 45 are distributed on the inner ring wall of the fuse wire mounting ring 33, two spring plates 34 are symmetrically and vertically arranged at the left end of the fuse wire mounting ring 33, two hinge grooves 35 are symmetrically and vertically arranged in the fuse wire mounting ring 33, a hinge shaft 36 is rotatably arranged on the rear wall of the hinge groove 35, a hinge conductive plate 37 is fixedly arranged on the hinge shaft 36, a connecting spring 38 is connected between the upper end of the hinge conductive plate 37 and the lower end of the spring plate 34, two fixed blocks 39 which are symmetrically and vertically arranged at the right end of the fuse wire mounting ring 33, a limiting ring 40 is fixedly connected at the right end of the two fixed blocks 39, a limiting groove 44 which penetrates through the limiting ring 40 from left to right is arranged in the limiting ring 40, four limiting sliding grooves 41 are arranged in an annular array in the limiting sliding groove 41, and a limiting fixture block 42 is slidably arranged in the limiting, and a limiting spring 43 is connected between the upper end of the limiting fixture block 42 and the top wall of the limiting chute 41.

Beneficially, a pulley cavity 26 is arranged in the linkage block 20, pulley rotating shafts 27 are symmetrically and rotatably arranged on the rear wall of the pulley cavity 26 in a left-right manner, fixed pulleys 28 are fixedly arranged on the pulley rotating shafts 27, a winding motor 30 is fixedly arranged at the upper end of the linkage block 20, a winding rotating shaft 31 is rotatably arranged at the front end of the winding motor 30, a winding disc 32 is fixedly arranged on the winding rotating shaft 31, two slider pull ropes 29 are wound on the winding disc 32, and the slider pull ropes 29 are fixedly connected to the linkage slider 22 by respectively bypassing the two fixed pulleys 28.

Beneficially, a limiting cylinder 46 is fixedly arranged at the lower end of the fixing ring 13 on the right side, a limiting sliding groove 47 with a downward opening is arranged in the limiting cylinder 46, a second ejector rod 48 is arranged in the limiting sliding groove 47 in a sliding manner, a limiting spring 49 is connected between the upper end of the second ejector rod 48 and the top wall of the limiting sliding groove 47, a fixing plate 50 is fixedly arranged at the right end of the second ejector rod 48, a tripping cavity 51 is arranged in the work box 10, a third electric wire 60 is fixedly arranged on the right wall of the tripping cavity 51, a binding post 61 is fixedly arranged at the left end of the third electric wire 60, and a conductive connecting block 63 is fixedly arranged at the lower end of;

the fixed insulation board 56 that is equipped with of 62 lower extremes of friction pull rod, the insulation board 56 lower extreme with it is equipped with between tripping operation chamber 51 diapire to connect and connects telescopic link 55, roof spring 57, the fixed conducting block 58 that is equipped with on the insulation board 56, be equipped with the electrically conductive spout 64 of downward open-ended in the electrically conductive connecting block 63, conducting block 58 slide set up in the electrically conductive spout 64, the fixed two lug draw-in grooves 66 that are equipped with of symmetry before electrically conductive spout 64 on the wall, the fixed two electrically conductive elastic lug 65 that are equipped with of symmetry around on the conducting block 58, electrically conductive elastic lug 65 can block in the lug draw-in groove 66.

Advantageously, a communication groove 52 is communicated between the fusing cavity 11 and the tripping cavity 51, a rotating shaft 53 is rotatably arranged on the rear wall of the communication groove 52, a linkage plate 54 is fixedly arranged on the rotating shaft 53, and a second electric conductor 59 is connected between the conductive block 58 and the second electric wire 16.

Beneficially, two collecting grooves 67 are fixedly arranged on the bottom wall of the fusing cavity 11 in a bilaterally symmetrical manner, a feeding groove 72 is arranged on the rear wall of the fusing cavity 11 in a communicating manner, a fuse wire storage groove 68 arranged in the rear wall of the fusing cavity 11 is arranged at the upper end of the feeding groove 72 in a communicating manner, a push plate 69 is arranged in the fuse wire storage groove 68 in a sliding manner, a push plate spring 70 is arranged at the rear end of the push plate 69 and connected to the rear wall of the fuse wire storage groove 68 in a connecting manner, a fuse wire 71 is arranged in the fuse wire storage groove 68 in a sliding manner, an electric telescopic rod 73 is fixedly arranged on the rear wall of the feeding groove 72, an elastic feeding groove 74 is fixedly arranged at the front end of the electric telescopic rod 73, a limiting plate sliding groove 76 is fixedly arranged at the upper end of the elastic feeding groove 74, a limiting plate 75 is arranged on the rear wall of the feeding groove 72 in a.

Advantageously, the conductive ring 18, the first conductive ring 19, the conductive frame 24, the fuse mounting ring 33, the hinge shaft 36, the hinge conductive plate 37, the conductive brush 45, the second conductive ring 59, the conductive block 58, the conductive elastic projection 65, the conductive connection block 63 and the terminal post 61 are all made of conductive materials, and the elastic feed groove 74 is made of elastic materials.

The working steps are as follows: in an initial state, the two slide block pull ropes 29 are in a relaxed state, one fuse wire 71 is connected and arranged in the two fuse wire mounting rings 33, when a short circuit occurs in a main circuit, current is transmitted to the first conductive ring 19, the conductive frame 24 and the fuse wire mounting rings 33 through the first electric wire 12 and the conductive ring 18, and is finally transmitted to the fuse wires 71 in the two fuse wire mounting rings 33 through the conductive brushes 45 arranged in the two fuse wire mounting rings 33, after the fuse wires 71 are fused, the slide block spring 25 pulls the linkage slide block 22 to move, the linkage slide block 22 on the left side moves leftwards and then moves upwards, the fuse wires 71 between the contact sensors 15 collide with the contact sensors 15 through the moving fuse wires 71, the fused part of the fuse wires 71 fall into the collecting groove 67 at the left end to be collected, and similarly, the part of the fuse wires 71 on the right side collide with the second push rod 48, the second push rod 48 pushes the part of the fuse wires on the right side out of the fuse wire mounting rings 33, finally falls into the collecting groove 67 on the right side for collection;

the right part of the fuse wire 71 impacts the second ejector rod 48 to drive the second ejector rod 48 to move upwards and drive the fixed plate 50 to move upwards at the same time, the fixed plate 50 pushes the left end of the linkage plate 54 to tilt, the insulating plate 56 is pressed downwards through the right end of the linkage plate 54 to drive the conductive block 58 and the friction pull rod 62 to move downwards, so that the conductive block 58 slides out of the conductive sliding chute 64, the top wall of the tripping cavity 51 is connected with the friction pull rod 62 in a sliding and friction mode, the friction pull rod 62 cannot automatically move upwards after moving downwards, the conductive block 58, the conductive elastic lug 65 and the conductive connecting block 63 cannot be contacted, and the second electric wire 16 and the third electric wire 60 are in a broken circuit state;

after the contact sensor 15 is impacted, an electric signal is sent, the electric telescopic rod 73 extends to drive the elastic feeding groove 74 to move forwards, a new fuse wire 71 is conveyed forwards through the elastic feeding groove 74, the winding motor 30 is started, the linkage slide block 22 is pulled to move and reset by winding the slide block pull rope 29 through the winding rotating shaft 31 and the winding disc 32, the two fuse wire mounting rings 33 are driven to move towards the middle, the fuse wire mounting rings 33 move towards the middle, the fuse wire 71 drives the limiting clamping block 42 to move towards the limiting spring 43 when passing through the limiting clamping block 42 in the moving process, the hinged conductive plate 37 is finally pushed to turn towards the connecting spring 38, the linkage sliding groove 21 and the winding disc 32 turn towards the other end, the slide block pull rope 29 is loosened, and the fuse wire 71 is clamped by the limiting clamping block 42 to prevent the fuse wire mounting rings 33 from moving towards the opposite direction;

the electric telescopic rod 73 is shortened, the elastic feeding groove 74 is pulled to reset, the push plate 69 pushes the fuse wire 71 in the fuse wire storage groove 68 to move, and the front fuse wire 71 is pushed into the elastic feeding groove 74;

after the circuit is checked and repaired, the friction pull rod 62 is lifted up manually to drive the insulating plate 56 to move upwards for resetting, so that the conductive block 58, the conductive elastic lug 65 and the conductive connecting block 63 are in contact connection again, and the circuit is communicated again.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.