Load disconnector

Abstract

The present invention relates to the field of low-voltage electrical appliances, and particularly relates to a load disconnector switch, which comprises a housing and at least one disconnection pole circuit arranged in the housing. Each disconnection pole circuit includes a fuse and a fuse state detection element that are paired one-to-one; the fuse state detection element is arranged on one side of the fuse, and the housing is opened from the other side of the fuse to disassemble and assemble the fuse; the load disconnector switch further includes an adaptive adjustment device, and the fuse state detection element is arranged on the adaptive adjustment device; the fuse cooperates with the adaptive adjustment device to keep the distance between the fuse and the fuse state detection element unchanged; for the load disconnector switch of the present invention, the fuse can be replaced simply, and the cooperation between the fuse and the fuse state detection element is reliable.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and in particular to a load breaking switch. Background Art

[0002] Most existing load-break switches, particularly those with strip-shaped housings, lack fuse status detection elements (such as micro switches). Confirming the fuse status requires on-site measurement and verification. Alternatively, some existing load-break switches, while equipped with fuse status detection elements, often have them mounted on the fuse itself. To replace a fuse, users must first remove the fuse status detection element, then pull out the fuse, replace it, and then reinstall it. This is a complex operation, and the power must be turned off before removing the fuse status detection element. Replacing a fuse without turning off the power presents a safety hazard. Summary of the Invention

[0003] The object of the present invention is to overcome the defects of the prior art and provide a load-break switch, wherein the fuse can be easily replaced and the fuse and the fuse state detection element cooperate reliably.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A load-break switch includes a housing 1 and at least one disconnecting pole circuit disposed within the housing 1. Each disconnecting pole circuit includes a fuse 3 and a fuse-state detection element 6 in a one-to-one relationship. The fuse-state detection element 6 is disposed on one side of the fuse 3, and the housing 1 is opened from the other side of the fuse 3 to remove and install the fuse 3. The load-break switch also includes an adaptive adjustment device 4, on which the fuse-state detection element 6 is disposed. The fuse 3 cooperates with the adaptive adjustment device 4 to maintain a constant distance between the fuse 3 and the fuse-state detection element 6.

[0006] Preferably, the fuse state detection element 6 is a micro switch, which includes a switch body 60 and a driving rod 61 arranged at one end of the switch body 60; the fuse 3 includes a pin 32 arranged on one side thereof and opposite to the fuse state detection element 6; the fuse 3 cooperates with the adaptive adjustment device 4 to keep the distance between the pin 32 and the micro switch unchanged.

[0007] Preferably, the adaptive adjustment device 4 includes a return spring 42 cooperating with the fuse state detection element 6 .

[0008] Preferably, the adaptive adjustment device 4 includes a moving seat 41 and a return spring 42 cooperating with the moving seat 41. The fuse state detection element 6 is arranged on the moving seat 41 and moves synchronously therewith. One end of the moving seat 41 protrudes on one side of the fuse state detection element 6 and is in driving cooperation with the fuse 3.

[0009] Preferably, the moving seat 41 is of an L-shaped structure and includes a moving seat vertical portion 411 and a moving seat horizontal portion 412 which are bent and connected. The fuse state detection element 6 is installed on the moving seat vertical portion 411. The free end of the moving seat vertical portion 411 is in driving cooperation with the fuse 3, and the moving seat horizontal portion 412 cooperates with the return spring 42.

[0010] Preferably, a moving seat mounting platform 414 protrudes and is provided in the middle on one side of the moving seat vertical portion 411. The fuse state detection element 6 is arranged on the moving seat mounting platform 414 and is located on both sides of the moving seat mounting platform 414 respectively with the moving seat vertical portion 411.

[0011] Preferably, the adaptive adjustment device further includes a base frame 43 for limiting and guiding the moving seat 41.

[0012] Preferably, the moving seat 41 is connected to the base frame 43 through a track structure. The track structure includes a track platform 410 and a sliding track 4300 which is in sliding and limiting cooperation with the track platform 410.

[0013] Preferably, the base frame 43 includes a base frame first wall 430 which is arranged opposite to the moving seat vertical portion 411 of the moving seat 41. The sliding track 4300 is provided on the base frame first wall 430, and a track platform 410 is provided on one side of the moving seat vertical portion 411.

[0014] Preferably, the base frame 43 further includes a base frame second wall 433 which is arranged opposite to the base frame first wall 430 and a base frame bottom wall 431 whose two ends are respectively connected to the base frame first wall 430 and the base frame second wall 433. A first space 43-41 is formed between the base frame first wall 430 and the base frame second wall 433, and the moving seat 41 is movably arranged in the first space 43-41.

[0015] Preferably, a first spring limiting column 413 is provided on one side of the moving seat horizontal portion 412 of the moving seat 41. A second spring limiting column 432 which is in relative cooperation with the first spring limiting column 413 is provided on one side of the base frame bottom wall 431. The return spring 42 is arranged between the moving seat horizontal portion 412 and the base frame bottom wall 431 and is in limiting cooperation with the first spring limiting column 413 and the second spring limiting column 432 at both ends respectively.

[0016] Preferably, the open-circuit pole circuit further includes an input wiring board and a screw introduction structure 5 used in cooperation. The fuse 3 and the input wiring board are respectively located at both ends of the housing 1. One end of the screw introduction structure 5 is arranged close to the fuse 3, and the other end is in relative cooperation with the input wiring board.

[0017] Preferably, the bottom wall 431 of the base frame is connected to one end of the screw introduction structure 5.

[0018] Preferably, the screw introduction structure 5 is a cylindrical structure, and a first annular slot 51 and a second annular slot 52 are respectively arranged at both ends, and are in limit cooperation with the housing 1 respectively.

[0019] Preferably, the adaptive adjustment device 4 further includes a moving seat limit structure 10 that is in limit cooperation with the moving seat 41. When the fuse 3 is removed, the return spring 42 makes one end of the moving seat 41 abut against the moving seat limit structure 10.

[0020] In the load disconnecting switch of the present invention, the fuse 3 and the adaptive adjustment device 4 cooperate to keep the distance between the fuse 3 and the fuse state detection element 6 unchanged, avoiding the situation that the cooperation between the fuse 3 and the fuse state detection element 6 fails due to too large dimensional deviation of the fuse 3, and the fuse state detection element 6 cannot accurately reflect the state of the fuse 3; the fuse state detection element 6 simultaneously realizes the remote monitoring of the state of the fuse 3; the arrangement position of the fuse state detection element 6 makes it unnecessary to touch the fuse state detection element 6 when disassembling and installing the fuse 3. On the one hand, it is convenient for users to operate, and on the other hand, it improves the safety of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the load disconnecting switch of the present invention;

[0022] Figure 2a is a schematic structural diagram of the load disconnecting switch of the present invention with the fuse installed in place;

[0023] Figure 2b is the present invention Figure 2a is an enlarged schematic structural diagram of part A of the present invention;

[0024] Figure 3a is a schematic structural diagram of the load disconnecting switch of the present invention with the fuse not installed in place;

[0025] Figure 3b is the present invention Figure 3a is an enlarged schematic structural diagram of part B of the present invention;

[0026] Figure 4a is a schematic structural diagram of the load disconnecting switch of the present invention, in which the thimble of the fuse is released and presses against the driving rod of the microswitch;

[0027] Figure 4b is the enlarged structural schematic diagram of part C of the present invention Figure 4a ;

[0028] Figure 5a is the structural schematic diagram of the load disconnector switch of the present invention, with its fuse removed

[0029] Figure 5b is the present invention Figure 5a is the enlarged structural schematic diagram of part D of the present invention

[0030] Figure 6 is the structural schematic diagram of the adaptive adjustment device of the present invention

[0031] Figure 7 is the structural schematic diagram of the adaptive adjustment device of the present invention, with its reset spring removed

[0032] Figure 8 is the exploded structural schematic diagram of the adaptive adjustment device of the present invention

[0033] Figure 9 is the exploded structural schematic diagram of the microswitch and the moving seat of the present invention

[0034] Figure 10a is the structural schematic diagram of the mating structure between the base frame and the first half shell of the present invention

[0035] Figure 10b is the present invention Figure 10a is the enlarged structural schematic diagram of part E of the present invention

[0036] Figure 11 is the structural schematic diagram of the housing of the present invention Detailed implementation manners

[0037] The following further illustrates the detailed implementation manners of the load disconnector switch of the present invention in combination with the embodiments Figures 1 - 11 given below. The load disconnector switch of the present invention is not limited to the description of the following embodiments

[0038] The load disconnector of the present invention includes a housing 1 and at least one disconnection pole circuit arranged in the housing 1. Each disconnection pole circuit includes a fuse 3 and a fuse state detection element 6 which are paired one by one; the fuse state detection element 6 is arranged on one side of the fuse 3, and the housing 1 is opened from the other side of the fuse 3 to disassemble and assemble the fuse 3; the load disconnector further includes an adaptive adjustment device 4, and the fuse state detection element 6 is arranged on the adaptive adjustment device 4; the fuse 3 is matched with the adaptive adjustment device 4 to keep the distance between the fuse 3 and the fuse state detection element 6 unchanged. For the load disconnector of the present invention, the fuse 3 and the adaptive adjustment device 4 are matched to keep the distance between the fuse 3 and the fuse state detection element 6 unchanged, avoiding the situation that due to too large dimensional deviation of the fuse 3, the cooperation between the fuse 3 and the fuse state detection element 6 fails and the fuse state detection element 6 cannot accurately reflect the state of the fuse 3; the fuse state detection element 6 simultaneously realizes the remote monitoring of the state of the fuse 3; the arrangement position of the fuse state detection element 6 enables the fuse state detection element 6 not to be touched when disassembling and assembling the fuse 3. On the one hand, it is convenient for users to operate, and on the other hand, it improves the safety of operation.

[0039] Preferably, as Figures 2a - 9 shown, the fuse state detection element 6 is a microswitch. The microswitch includes a switch body 60 and a driving rod 61 arranged at one end of the switch body 60; the fuse 3 includes a thimble 32 arranged on one side thereof and opposite to the fuse state detection element 6; the fuse 3 is matched with the adaptive adjustment device 4 to keep the distance between the thimble 32 and the microswitch unchanged. In practical applications, if the dimensional deviation of the fuse 3 is too large, it will cause the distance between the fuse 3 and the microswitch to be too large. After the fuse 3 melts, the output stroke of the thimble 32 of the fuse 3 cannot push the microswitch, and the microswitch cannot switch its state, so the microswitch cannot realize the detection function of the fuse state; for the load disconnector of the present invention, the fuse 3 is matched with the adaptive adjustment device 4 to keep the distance between the fuse 3 and the fuse state detection element 6 unchanged, which ensures that after the fuse 3 melts, the thimble 32 can push the microswitch to switch its state, thereby indicating the state of the fuse 3.

[0040] The load disconnector of the present invention will be further described below in conjunction with the specification drawings and specific embodiments.

[0041] As Figure 1 and 11 shown, the load disconnector of the present invention includes a housing 1 and at least one disconnection pole circuit arranged in the housing 1. Each disconnection pole circuit includes a fuse 3 and a fuse state detection element 6 which are paired one by one.

[0042] Specifically, asFigure 1 As shown, the load disconnector of the present invention is a three-phase switching device, which includes three disconnection pole circuits arranged side by side and spaced apart within the housing 1.

[0043] Preferably, as Figures 1 - 5b shown, the fuse state detection element 6 is arranged on one side of the fuse 3, and the housing 1 is opened from the other side of the fuse 3 to disassemble and assemble the fuse 3; the load disconnector further includes an adaptive adjustment device 4, and the fuse state detection element 6 is arranged on the adaptive adjustment device 4; the fuse 3 cooperates with the adaptive adjustment device 4 to keep the distance between the fuse 3 and the fuse state detection element 6 unchanged. Further, as Figures 1 - 5b shown, the fuse state detection element 6 can move relative to the housing 1.

[0044] Preferably, the load disconnector of the present invention further includes a contact system (not shown in the figure), the contact system includes a moving contact mechanism and a static contact group used in cooperation, and the moving contact mechanism and the fuse 3 are respectively arranged on both sides of the fuse state detection element 6.

[0045] Specifically, as Figures 1 - 5b shown in the direction, the fuse 3 and the moving contact mechanism are respectively arranged on the upper side and the lower side of the fuse state detection element 6, and the fuse state detection element 6 can move up and down relative to the housing 1 to adapt to the assembly position and dimensional error of the fuse 3, so as to ensure that the distance between the fuse 3 and the fuse state detection element 6 remains unchanged.

[0046] Preferably, as Figures 2a - 9 shown, the fuse state detection element 6 is a microswitch, the microswitch includes a switch body 60 and a driving rod 61 arranged at one end of the switch body 60; the fuse 3 includes a thimble 32 arranged on one side thereof and opposite to the fuse state detection element; the fuse 3 cooperates with the adaptive adjustment device 4 to keep the distance between the thimble 32 and the microswitch unchanged. Further, as Figures 2a - 5b shown, the fuse 3 further includes a fuse housing protrusion 31 protruding from one side thereof, and the thimble 32 is arranged in the middle of the fuse housing protrusion 31. Specifically, as Figure 2a 、 2b shown, under normal circumstances, the thimble 32 is held inside the fuse 3, as Figure 4a and 4b shown, when the fuse 3 fuses, the thimble 32 pops out from inside the fuse 3 and presses against the driving rod 61 of the microswitch, causing the microswitch to switch states (for example, from the off state to the on state, or from the on state to the off state).

[0047] Preferably, as Figure 9As shown, the driving rod 61 includes a rod portion 610 and a driven shaft 611. One end of the rod portion 610 is pivotally connected to the switch body 60, and the other end is provided with the driven shaft 611. The ejector pin 32 of the fuse 3 is in driving cooperation with the driven shaft 611.

[0048] It should be noted that the adaptive adjustment device 4 can be implemented in various ways. The main thing is to enable the fuse status detection element 6 to move relative to the housing 1, and the fuse status detection element 6 can be adjusted synchronously with the fuse 3 during the process of the fuse 3 being in place. Several implementation methods of the adaptive adjustment device 4 will be introduced below. Of course, the adaptive adjustment device 4 is not limited to the technical solutions described below.

[0049] One implementation method of the adaptive adjustment device 4 is as follows:

[0050] The adaptive adjustment device 4 includes a return spring 42 that is in driving cooperation with the fuse status detection element 6. During the process of assembling the fuse 3 to the load disconnecting switch until it is in place, the fuse 3 first contacts the fuse status detection element 6, and then the fuse 3 continues to move and drives the fuse status detection element 6 to move synchronously. The return spring 42 stores energy, so that a constant distance is always maintained between the fuse status detection element 6 and the fuse 3.

[0051] Preferably, the return spring 42 and the fuse 3 are respectively located on both sides of the fuse status detection element 6. During the process of the fuse 3 being assembled in place, the return spring 42 is compressed, providing a force to the fuse status detection element 6 to keep it in contact with the fuse 3 all the time; when the fuse 3 is removed, the return spring 42 drives the fuse status detection element 6 to reset, thus realizing the reciprocating movement of the fuse status detection element 6 relative to the housing 1. It should be noted that the return spring 42 is not limited to the above-mentioned implementation method. The return spring 42 can be a compression spring, a tension spring, a torsion spring or any elastic element, as long as it can achieve the energy storage / dissipation process and drive the fuse status detection element 6 to reset when the fuse 3 is removed; of course, considering the simplification of the structure and easy implementation, the return spring 42 of the present invention is preferably a compression spring, and is respectively arranged on both sides of the fuse status detection element 6 with the fuse 3.

[0052] Preferably, one end of the return spring 42 is in limit cooperation with the fuse status detection element 6, and the other end is in limit cooperation with the housing 1. Structures for limiting the return spring 42 are respectively provided on the fuse status detection element 6 and the housing 1.

[0053] Such as Figures 1 - 10bAs shown in the figure, another implementation of the adaptive adjustment device 4 is as follows: The adaptive adjustment device 4 includes a moving seat 41 and a return spring 42 cooperating with the moving seat 41. The fuse state detection element 6 is arranged on the moving seat 41 and moves synchronously with it. One end of the moving seat 41 protrudes on one side of the fuse state detection element 6 and is in driving cooperation with the fuse 3. Further, as Figure 3b shown, the fuse 3 and the return spring 42 are respectively arranged on both sides of the moving seat 41.

[0054] Preferably, as Figures 7 - 9 shown, the moving seat 41 has an L-shaped structure, which includes a moving seat vertical part 411 and a moving seat horizontal part 412 connected by bending. The fuse state detection element 6 is installed on the moving seat vertical part 411. The free end of the moving seat 41 protrudes on one side of the fuse state detection element 6 and is in driving cooperation with the fuse 3. The moving seat horizontal part 412 cooperates with the return spring 42. Further, as Figures 7 - 9 shown, a moving seat mounting platform 414 protrudes in the middle on one side of the moving seat vertical part 411. The fuse state detection element 6 is arranged on the moving seat mounting platform 414 and is located on both sides of the moving seat mounting platform 414 respectively with the moving seat vertical part 411. Further, as Figure 9 shown, two element limiting columns 4140 are provided on one side of the moving seat mounting platform 414, and two element limiting holes 600 are provided on the fuse state detection element 6. The two element limiting columns 4140 are respectively inserted into the two element limiting holes 600.

[0055] Preferably, as Figures 2a - 5b shown, the protruding part 31 of the fuse housing of the fuse 3 is in driving cooperation with the free end of the moving seat vertical part 411. It should be noted that the porcelain body of the fuse 3 or other part structures of the fuse 3 can also be used for driving cooperation with the moving seat vertical part 411.

[0056] Specifically, as Figures 2a - 9 shown, the fuse 3 and the return spring 42 are respectively located on the upper side and the lower side of the moving seat 41. The upper end of the moving seat vertical part 411 of the moving seat 41 protrudes above the fuse state detection element 6 and is in driving cooperation with the fuse 3; as Figures 2a - 5b shown, when the fuse 3 is installed into the load disconnector switch, the fuse 3 moves downward from above the housing 1 until it contacts the lower end of the moving seat vertical part 411. At this time, the distance between the fuse 3 and the fuse state detection element 6 begins to remain unchanged. The fuse 3 further moves downward until it is installed in place, and the fuse 3 and the fuse state detection element 6 move downward synchronously.

[0057] Preferably, as Figure 2b 、 3b, as shown in Figures 4b, 5b, 6 - 8, the adaptive adjustment device 4 further includes a base frame 43 for limiting and guiding the moving seat 41. Further, as Figures 6 - 8 shown, the moving seat 41 is connected to the base frame 43 through a track structure, and the track structure includes a track platform 410 and a sliding track 4300 that is slidably and limit - fitted with the track platform 410. Further, one of the track platform 410 and the sliding track 4300 is provided on the moving seat 41, and the other is provided on the base frame 43. Further, as Figures 6 - 8 shown, the track platform 410 is provided on the moving seat 41, and the sliding track 4300 is provided on the base frame 43.

[0058] Preferably, as Figures 6 - 8 shown, the track platform 410 is a T - shaped track platform, and the sliding track 4300 is a strip - shaped track groove. It should be noted that the implementation manners of the track platform 410 and the sliding track 4300 are not limited to the above structures, and any track platform and sliding track structures that can achieve reliable limiting and smooth sliding fit between the moving seat 41 and the base frame 43 can be applied to the adaptive adjustment device 4 of the present invention.

[0059] It should be pointed out that the load - breaking switch of the present invention may not be provided with the base frame 43, but instead the moving seat 41 is made to cooperate with the housing 1 through a track structure, which can also play a role in guiding and limiting the moving seat 41.

[0060] Preferably, as Figures shown, the base frame 43 further includes a first wall 430 of the base frame that is disposed opposite to the vertical part 411 of the moving seat 41 of the moving seat 41. The first wall 430 of the base frame is provided with a sliding track 4300, and a track platform 410 is provided on one side of the vertical part 411 of the moving seat 41. Further, as ​ shown, the base frame 43 further includes a second wall 432 of the base frame that is disposed opposite to the first wall 430 of the base frame and a bottom wall 431 of the base frame whose two ends are respectively connected to the first wall 430 of the base frame and the second wall 433 of the base frame. A first space 43 - 41 is formed between the first wall 430 of the base frame and the second wall 433 of the base frame, and the moving seat 41 is movably disposed in the first space 43 - 41.

[0061] Preferably, as ​ shown, a first spring limiting column 413 is provided on one side of the horizontal part 412 of the moving seat 41 of the moving seat 41, and a second spring limiting column 432 that is relatively fitted with the first spring limiting column 413 is provided on one side of the bottom wall 431 of the base frame. The return spring 42 is disposed between the horizontal part 412 of the moving seat 41 and the bottom wall 431 of the base frame, and its two ends are respectively limit - fitted with the first spring limiting column 413 and the second spring limiting column 432. Specifically, as ​In the indicated direction, the first spring limiting post 413 is provided on the lower side of the horizontal part 412 of the moving seat, and the second spring limiting post 413 is provided on the upper side of the bottom wall 431 of the base frame.

[0062] Preferably, as ​ shown, the adaptive adjustment device 4 includes two reset springs 42 arranged side by side, and both of the two reset springs 42 are provided between the horizontal part 412 of the moving seat and the bottom wall 431 of the base frame. Of course, according to needs, the number of the reset springs 42 can be adjusted by itself.

[0063] Preferably, as ​ shown in Figure 0, the open-circuit pole circuit further includes a cooperating input wiring board (not shown in the figure) and a screw introducing structure 5. The fuse 3 and the input wiring board are respectively located at both ends of the housing 1. One end of the screw introducing structure 5 is arranged close to the fuse 3, and the other end is in relative cooperation with the input wiring board. During actual use, a wiring screw is placed into one end of the screw introducing structure 5, and the wiring screw is guided to the other end of the screw introducing structure 5 to cooperate with the input wiring board. Further, as ​ shown, the bottom wall 431 of the base frame is connected to one end of the screw introducing structure 5.

[0064] Preferably, as ​ shown, the bottom wall 431 of the base frame and the screw introducing structure 5 are of an integral structure.

[0065] It should be noted that the base frame 43 may not be connected to the screw introducing structure 5, but is provided separately and is in limit cooperation with the housing 1; or, the base frame 43 may also be provided as an integral structure with the housing 1.

[0066] Preferably, as ​ 、 10a shown in Figures -11, the screw introducing structure 5 is of a cylindrical structure, and a first annular slot 51 and a second annular slot 52 are respectively provided at both ends, and are in limit cooperation with the housing 1 respectively. Further, as ​ 、 10a shown in Figures -11, the housing 1 includes a cooperating first half shell 1a and a second half shell 1b. The first half shell 1a includes a first upper limiting rib 10a and a first lower limiting rib 11a provided thereon. Both the first upper limiting rib 10a and the first lower limiting rib 11a are provided with arc-shaped bayonets. The second half shell 1b includes a second upper limiting rib 10b and a second lower limiting rib 11b provided thereon. Both the second upper limiting rib 10b and the second lower limiting rib 11b are provided with arc-shaped bayonets. The first upper limiting rib 10a and the second upper limiting rib 10b cooperate, and the two arc-shaped bayonets cooperate with the first annular slot 51. The first lower limiting rib 11a and the second lower limiting rib 11b cooperate, and the two arc-shaped bayonets cooperate with the second annular slot 52.

[0067] Preferably, as ​ shown, the adaptive adjustment device 4 further includes a strengthening structure 44 provided on one side of the second wall 433 of the base frame. One end of the strengthening structure 44 is connected to the bottom wall 431 of the base frame, and the other end is in limiting cooperation with the first half shell 1a. One side of the strengthening structure 44 is also connected to the second wall 433 of the base frame. Further, as ​ shown, the strengthening structure 44 includes a main strengthening structure board 440, a secondary strengthening structure board 441, and a strengthening structure gripper 442. One end of the main strengthening structure board 440 is connected to the bottom wall 431 of the base frame, and the other end is connected to the strengthening structure gripper 442. One side edge of the main strengthening structure board 440 is connected to the second wall 433 of the base frame. The secondary strengthening structure board 442 is provided in the middle of one side of the main strengthening structure board 440 and is vertically connected thereto. One end of the secondary strengthening structure board 442 is connected to the bottom wall 431 of the base frame, and the other end is connected to the strengthening structure gripper 442. The secondary strengthening structure board 442 is arranged parallel to the second wall 433 of the base frame; as ​ shown, the first half shell 1a includes a housing reinforcing rib provided thereon and cooperating with the strengthening structure gripper 442. Further, as ​ shown, the cross section of the strengthening structure gripper 442 is a U-shaped structure, including a gripper card slot provided in the middle thereof; as ​ shown, the gripper card slot is in limiting cooperation with the housing reinforcing rib.

[0068] Preferably, as ​ and 10b shown, one end of the first annular card slot 51 is provided with a flat limiting portion, and a flat card slot 53 is provided on each side of the flat limiting portion. The flat limiting portion is located below the strengthening structure 44; as ​ shown, a flat limiting portion slot is provided in the middle of the first upper limiting rib 10a of the first half shell 1a, and the flat limiting portion is inserted into the flat limiting portion slot. The two flat card slots 53 are in limiting cooperation with the two side walls of the flat limiting portion slot respectively.

[0069] Preferably, as ​ shown, the adaptive adjustment device 4 further includes a moving seat limiting structure 10 in limiting cooperation with the moving seat 41. When the fuse 3 is removed, the return spring 42 makes one end of the moving seat 41 abut against the moving seat limiting structure 10, avoiding the situation that when the fuse 3 is disassembled and assembled, due to the return action of the return spring 4a, the fuse state detection element 6 and the moving seat 41 move excessively, affecting the user operation. Further, as ​ shown, the moving seat limiting structure 10 is in limiting cooperation with the track table 410 of the moving seat 41. Specifically, as ​ 、 3b 、4b and 5b shown in the direction, the moving seat limiting structure 10 is located above the track table 410; as ​As shown, when the fuse 3 is assembled in place, the moving seat 41 is squeezed by the fuse 3, driving the fuse status detection element 6 to move downward, so that a gap is formed between the track platform 410 and the moving seat limiting structure 10; as ​ shown, when the fuse 3 is assembled into the load break switch and not yet assembled in place, the fuse 3 initially contacts the upper end of the vertical part 411 of the moving seat. If the fuse 3 continues to move downward, it will squeeze the moving seat 4 and drive the fuse status detection element 6 to move downward; as ​ shown, when the fuse 3 is removed, the moving seat 4 moves upward under the action of the return spring 42, so that the track platform 411 of the moving seat 41 abuts against the moving seat limiting structure 10.

[0070] Preferably, the moving seat limiting structure 10 is a limiting rib integrally formed with the housing 1.

[0071] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A load-break switch comprising a housing (1) and at least one disconnecting pole circuit disposed in the housing (1), each disconnecting pole circuit comprising a fuse (3) and a fuse state detection element (6) in a one-to-one matching relationship; characterized in that: The fuse state detection element (6) is arranged on one side of the fuse (3), and the housing (1) is opened from the other side of the fuse (3) to disassemble and install the fuse (3); The load-break switch further comprises an adaptive adjustment device (4), and a fuse state detection element (6) is arranged on the adaptive adjustment device (4); the fuse (3) cooperates with the adaptive adjustment device (4) to keep the distance between the fuse (3) and the fuse state detection element (6) constant.

2. The load-break switch according to claim 1, wherein: The fuse state detection element (6) is a micro switch, which includes a switch body (60) and a driving rod (61) arranged at one end of the switch body (60); the fuse (3) includes a pin (32) arranged on one side thereof and opposite to the fuse state detection element (6); the fuse (3) cooperates with the adaptive adjustment device (4) to keep the distance between the pin (32) and the micro switch constant.

3. The load-break switch according to claim 1, wherein: The adaptive adjustment device (4) comprises a return spring (42) cooperating with a fuse state detection element (6).

4. The load-break switch according to claim 1, wherein: The adaptive adjustment device (4) comprises a movable seat (41) and a return spring (42) cooperating with the movable seat (41); a fuse state detection element (6) is arranged on the movable seat (41) and moves synchronously therewith; one end of the movable seat (41) protrudes from one side of the fuse state detection element (6) and is driven to cooperate with the fuse (3).

5. The load-break switch according to claim 4, characterized in that: The movable seat (41) is an L-shaped structure, comprising a movable seat vertical portion (411) and a movable seat horizontal portion (412) connected by bending. The fuse state detection element (6) is mounted on the movable seat vertical portion (411). The free end of the movable seat vertical portion (411) is driven by the fuse (3), and the movable seat horizontal portion (412) is engaged with the reset spring (42).

6. The load-break switch according to claim 5, characterized in that: A movable seat mounting platform (414) is protrudingly provided in the middle of one side of the movable seat vertical portion (411), and a fuse state detection element (6) is provided on the movable seat mounting platform (414) and is located on both sides of the movable seat mounting platform (414) together with the movable seat vertical portion (411).

7. The load-break switch according to any one of claims 4 to 6, characterized in that: The self-adaptive adjustment device further comprises a base frame (43) for limiting and guiding the movable seat (41).

8. The load-break switch according to claim 7, wherein: The movable seat (41) is connected to the base frame (43) via a track structure, wherein the track structure comprises a track platform (410) and a sliding track (4300) that is slidably limited and matched with the track platform (410).

9. The load-break switch according to claim 8, characterized in that: The base frame (43) includes a base frame first wall (430) arranged opposite to the moving seat vertical portion (411) of the moving seat (41), the base frame first wall (430) is provided with a sliding track (4300), and a track platform (410) is provided on one side of the moving seat vertical portion (411).

10. The load-break switch according to claim 9, characterized in that: The base frame (43) further includes a base frame second wall (433) arranged opposite to the base frame first wall (430) and a base frame bottom wall (431) whose two ends are respectively connected to the base frame first wall (430) and the base frame second wall (433); a first space (43-41) is formed between the base frame first wall (430) and the base frame second wall (433); and the movable seat (41) is movably arranged in the first space (43-41).

11. The load-break switch according to claim 10, wherein: A first spring limiting column (413) is provided on one side of the horizontal portion (412) of the movable seat (41), and a second spring limiting column (432) is provided on one side of the bottom wall (431) of the base frame, which is matched with the first spring limiting column (413). A return spring (42) is arranged between the horizontal portion (412) of the movable seat and the bottom wall (431) of the base frame, and its two ends are respectively matched with the first spring limiting column (413) and the second spring limiting column (432).

12. The load-break switch according to claim 10, wherein: The disconnecting pole circuit also includes an input wiring board and a screw introduction structure (5) for use therewith. The fuse (3) and the input wiring board are respectively located at two ends of the housing (1). One end of the screw introduction structure (5) is arranged close to the fuse (3), and the other end is opposite to the input wiring board.

13. The load-break switch according to claim 12, wherein: The base frame bottom wall (431) is connected to one end of the screw introduction structure (5).

14. The load-break switch according to claim 12 or 13, characterized in that: The screw introduction structure (5) is a cylindrical structure, with a first annular clamping groove (51) and a second annular clamping groove (52) respectively provided at both ends, and respectively engaging with the housing (1) in a limiting manner.

15. The load-break switch according to claim 4, wherein: The self-adaptive adjustment device (4) further comprises a movable seat limiting structure (10) that cooperates with the movable seat (41) for limiting. When the fuse (3) is removed, the return spring (42) causes one end of the movable seat (41) to contact the movable seat limiting structure (10).

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