Wire anti-loosening type intelligent circuit breaker

By adding solenoids, iron plates and torsion springs to the smart circuit breaker, the problem of the locking member losing rotational power when the wire reaches the lowest end is solved, and a more stable wire connection is achieved.

CN119786318AActive Publication Date: 2025-04-08GUANGZHOU XD HIGH VOLTAGE ELECTRIC MFG CO LTD +1
View PDF 5 Cites 0 Cited by

Patent Information

Application Number
CN202411876428.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-18
Publication Date
2025-04-08
Estimated Expiration
2044-12-18

AI Technical Summary

Technical Problem

When the existing circuit breaker contacts the lowermost end of the second opening, the locking member loses rotational power, causing the wire to be unable to continue to contact the first section, and the locking lever is not inserted into the slot, resulting in a reduction in the locking effect.

Method used

By adding the solenoid and the iron sheet, adjust the position of the locking member to prevent the locking member from rotating; add torsion springs at both ends of the rotating connection of the locking member to limit the initial position of the locking member and ensure normal rotation.

Benefits of technology

It effectively avoids the problem of the locking parts not being fully rotated, improves the locking effect between the wire and the circuit breaker, and ensures a stable connection between the wire.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119786318A_ABST
    Figure CN119786318A_ABST
Patent Text Reader

Abstract

The invention discloses a wire looseness prevention type intelligent circuit breaker, and relates to the technical field of electrical switch devices, the wire looseness prevention type intelligent circuit breaker comprises a circuit breaker body, two fixing assemblies, a clamping assembly, an intercepting assembly and a locking assembly, the fixing assemblies are used for connecting a circuit breaker body line, and the two fixing assemblies are symmetrically arranged at the upper end and the lower end of the circuit breaker body; the fixing assembly comprises a fixing shell, a first through opening, a second through opening and a wire. The number of the first ports is consistent with that of the second ports, and the first ports and the second ports are in one-to-one correspondence; the fixed shell is fixed on the circuit breaker body; by adding an electromagnet and a first iron sheet, the position of a locking piece can be adjusted, and the situation that when a wire stretches into the lowest end of a first through opening to make contact with a conductive piece, the locking piece does not rotate completely, consequently, a limiting rod cannot be inserted into a limiting groove, and the position of the locking piece and the position of the wire are limited is avoided; meanwhile, the torsional springs are additionally arranged at the two rotationally-connected ends of the locking piece, and the initial position of the locking piece is limited through the torsional springs.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The invention relates to the technical field of electrical switch devices, and in particular to a wire-loosening-proof intelligent circuit breaker. Background Art

[0002] A circuit breaker is a switching device that can close, carry and interrupt current under normal or abnormal circuit conditions. A circuit breaker is an important electrical device for the protection and operation of power systems. It can be used to distribute electrical energy, start asynchronous motors infrequently, and protect power lines and motors.

[0003] Currently, when installing a circuit breaker, the connection between the wire and the circuit breaker is unstable and is prone to shifting when the wire is pulled, resulting in poor contact.

[0004] For example, the circuit breaker provided by the authorization announcement number CN114597103B is configured such that the limiting ring of the auxiliary plug-in is first sleeved on the wiring terminal of the wire and then the wiring is connected. The wire presses the first section during the descent process to rotate the locking member as a whole. During the rotation process, the second section is stuck on the top of the limiting ring. When pressed to the lowest end, the locking rod will extend into the slot to limit the position of the wire. The wiring terminal of the wire can be tightly matched with the locking assembly of the circuit breaker under the action of the limiting ring of the auxiliary plug-in. The wiring terminal of the wire will not be squeezed open or shifted in position due to the pulling of external force, resulting in loose wiring, thereby avoiding burning of the circuit breaker and the wire.

[0005] It has major disadvantages: when the wire hits the lower end of the second opening, the locking piece loses its rotational power. At this time, the wire does not hit the locking piece and has not reached the final state. The wire is intercepted by the second section and cannot continue to hit the first section. The second section has not yet hit the auxiliary plug-in or the wire, and the locking rod has not been inserted into the slot, resulting in the device not locking the wire, and the locking effect of the wire is reduced; at the same time, the locking piece is rotatably connected in the second opening, and there is no other limiting structure. The locking piece is composed of a first section and a second section, which are inconsistent in size, resulting in the heavier one being at the bottom, resulting in the wire being unable to hit the first section when it descends. Summary of the invention

[0006] The embodiment of the present application provides a wire loosening-proof intelligent circuit breaker, which solves the problem in the prior art that when the wire hits the lowermost end of the second opening, the locking member loses its rotational power. At this time, the wire does not hit the locking member and has not reached the final state. The wire is intercepted by the second section and cannot continue to hit the first section. The second section has not hit the auxiliary plug-in or the wire, and the locking rod has not been inserted into the card slot, resulting in the device not locking the wire, which reduces the locking effect of the wire. At the same time, the locking member is rotatably connected in the second opening, and there is no other limiting structure. The locking member consists of the first section and the second section. The two are not the same size, so the heavier one will be at the bottom, resulting in the wire being unable to contact the first section when it descends. By adding an electromagnet and an iron sheet, the position of the locking piece can be adjusted to avoid the locking piece not being fully rotated when the wire extends into the lowest end of the through-port and contacts the conductive piece, resulting in the limit rod being unable to be inserted into the limit groove, thereby limiting the position of the locking piece and the wire; at the same time, torsion springs are added at both ends of the rotating connection of the locking piece, and the initial position of the locking piece is limited by the torsion springs to avoid the overall rotation of the device causing the overall device to be unable to be used normally.

[0007] The embodiment of the present application provides a wire loosening prevention type intelligent circuit breaker, including a circuit breaker body, a fixing assembly, a clamping assembly, an interception assembly and a locking assembly;

[0008] The fixing assembly is used to connect the circuit of the circuit breaker body. There are two fixing assemblies, which are symmetrically arranged at the upper and lower ends of the circuit breaker body.

[0009] The fixing assembly comprises a fixing shell, a first through-port, a second through-port and a wire;

[0010] The number of the first opening is consistent with the number of the second opening, and they correspond one to one;

[0011] The fixed shell is fixed on the circuit breaker body, and one side of the fixed shell is provided with a second through-hole, and the second through-hole is provided with a plurality of through-holes and evenly spaced, and the side of the second through-hole away from the circuit breaker body is provided with a first through-hole, and the first through-hole passes through the fixed shell, and the connected through-holes form an L-shaped channel;

[0012] The number of the wires is consistent with the number of the through-port one, and they correspond one to one, and one end of the wire extends into the through-port one; the number of the locking components is consistent with the number of the wires, and they correspond one to one, and the locking components are arranged at one end of the wire extending into the through-port one;

[0013] The number of the interception components and the clamping components is consistent with the number of the second openings, and they correspond one-to-one with the second openings respectively;

[0014] The interception assembly is used to limit the position of the wire, and the interception assembly includes a locking member and a slider. There are two sliders, and the two sliders are symmetrically arranged in the second passage. The locking member is located between the two sliders, and the two ends of the locking member are respectively rotatably connected to the two sliders.

[0015] The clamping assembly is used to limit the position of the locking member, and the clamping assembly is arranged in the second through-port, and the clamping assembly is located on a side of the locking member close to the opening of the second through-port;

[0016] The interception assembly also includes a groove 1 and an iron sheet 1;

[0017] The locking member is provided with a groove 1, and an iron sheet 1 is arranged on one side of the groove 1;

[0018] The fixing assembly further includes an electromagnet, the number of which is consistent with the number of the second openings and corresponds one to one;

[0019] The electromagnet is arranged in the fixed shell and is located below the second through port and the locking member.

[0020] As an improvement, the locking member is cylindrical, and the axis of the locking member is perpendicular to the length direction of the second passage;

[0021] The length direction of the groove 1 is consistent with the axis of the locking member, the length of the groove 1 is consistent with the length of the axis direction of the locking member, and the cross section of the groove 1 is a right-angle sector;

[0022] The first and second openings are both in the shape of a rectangular parallelepiped;

[0023] A torsion spring is sleeved on the rotating rod that is rotatably connected to the locking member and the slider, and the two ends of the torsion spring are respectively fixed to the locking member and the slider. When the torsion spring on the rotating rod of the locking member is not subjected to force, a groove on one side of the locking member is located above the side away from the clamping assembly.

[0024] When the torsion spring on the rotating rod of the locking member is not subjected to stress, the iron sheet 1 is located on the side of the groove 1 close to the clamping assembly.

[0025] As an improvement, the fixing assembly further includes a conductive member and a power supply battery, the conductive member is fixed on one side of the second through hole close to the circuit breaker body, and the conductive member is electrically connected to the circuit breaker body;

[0026] A power supply battery is detachably provided on one side of the fixed shell away from the circuit breaker body, the number of the power supply batteries is consistent with the number of the electromagnets and corresponds one to one, and the power supply battery is electrically connected to the electromagnets;

[0027] The clamping assembly includes a sliding member, a sliding groove, a spring, a limiting rod and a pull plate;

[0028] The sliding member is in the shape of a rectangular parallelepiped, and the two sides of the sliding member are fixed on the two sides of the inner wall of the second passage. The sliding member is provided with a slide groove, and the slide groove is in the shape of a cylinder, and the axis of the slide groove is parallel to the length direction of the second passage. The limiting rod is in the shape of a cylinder matched with the slide groove, and the limiting rod is slidably connected in the slide groove, and one end of the limiting rod close to the locking member abuts against the outer wall of the locking member;

[0029] The spring is fixed to a side of the sliding member away from the locking member, the spring is sleeved on the limiting rod, and the pull plate is fixed to an end of the spring and the limiting rod away from the locking member;

[0030] The interception assembly further comprises a limiting groove, the outer wall of the locking member is provided with the limiting groove, the limiting groove is in the shape of a cylinder matched with the limiting rod, and the axis of the limiting groove is perpendicular to the axis of the locking member;

[0031] The locking assembly includes a fixing ring, a limiting opening, a deformation piece and an abutment bolt;

[0032] The fixing ring is arc-shaped and penetrates along the arc length direction, and the two ends of the deformation sheet are respectively inserted into the two ends of the arc length cavity of the fixing ring;

[0033] There are two limit openings and two abutment bolts respectively, and they correspond to each other one by one. The side of the fixing ring away from the axis thereof has a limit opening, and the two limit openings are symmetrically arranged.

[0034] The abutment bolt is threadedly connected in the limiting opening, and the two abutment bolts abut against the two ends of the deformation sheet respectively;

[0035] The wire is located between the fixing ring and the deformable sheet, and the end of the wire extending into the first through-hole is flush with the end of the fixing ring close to the conductive member;

[0036] The fixing ring is made of a conductive material, and the deformable sheet is made of a plastic deformable material.

[0037] As an improvement, when the wire extends from the first through-hole to the second through-hole and reaches the deepest point, the wire contacts the conductive member;

[0038] When the torsion spring on the rotating rod of the locking member is not subjected to stress, the limiting groove is located at the lower end of the locking member.

[0039] As an improvement, when the wire is inserted into the first and second openings, the lower end of the wire can contact the first groove on the locking member;

[0040] When the wire is inserted into the first through-port and contacts the second through-port, and the locking member rotates, the electromagnet is activated to attract the first iron sheet. When the locking member rotates 90 degrees, the limit rod is inserted into the limit groove, the lower end of the wire contacts the conductive member, and the groove of the locking member contacts the top of the fixing ring and the wire.

[0041] The length of the fixing ring in the axial direction is consistent with the distance from the axis of the locking piece to the second through-hole close to the side wall of the circuit breaker body.

[0042] As an improvement, the interception assembly further includes a second groove and a second iron sheet;

[0043] When the torsion spring on the rotating rod of the locking member is not under stress, the side surface of the groove 1 perpendicular to the extension direction of the limit rod is provided with a groove 2, and the iron sheet 1 is fixed on the side of the groove 2 away from its opening;

[0044] The second iron sheet is arranged on a side of the first iron sheet close to the opening of the second groove, and the first iron sheet is connected to the second iron sheet by rubber.

[0045] As an improvement, when the groove 1 of the locking member contacts the fixing ring, the iron sheet 2 also contacts the fixing ring.

[0046] As an improvement, the fixing assembly further includes an air delivery channel 1;

[0047] The number of the gas delivery channels is consistent with the number of interception components, and they correspond one to one;

[0048] The fixed shell is provided with a gas delivery channel 1, one end of the gas delivery channel 1 is connected to the through port 2, and the end of the gas delivery channel 1 away from the through port 2 passes through the fixed shell;

[0049] One end of the air delivery channel 1 away from the opening 2 is connected to the inflation mechanism;

[0050] Also included is an adjustment component, which includes a swing plate, a connecting plate, an air bag and an air delivery pipe;

[0051] When the torsion spring on the rotating rod of the locking member is not under stress, the connecting plate fixing groove is on a side parallel to the extension direction of the limiting rod, and the connecting plate is made of rubber;

[0052] There are two swing plates and two air bags respectively, which correspond to the two ends of the connecting plate respectively;

[0053] The swing plate is fixed at both ends of the connecting plate, the airbag is fixed between the swing plate and the groove 1, and the airbag is fixed on the side of the groove 1 parallel to the extension direction of the limit rod, and the two airbags are connected to each other;

[0054] One end of the gas delivery pipe is fixed to one end of the gas delivery channel 1 located in the second passage;

[0055] The interception assembly also includes a second air delivery channel;

[0056] The locking member is provided with a second air delivery channel, one end of which is connected to the air bag, and one end of the air delivery pipe away from the first air delivery channel is fixed to the other end of the second air delivery channel away from the air bag;

[0057] The gas delivery pipe is a telescopic hose.

[0058] As an improvement, the fixing assembly further includes a sliding group;

[0059] The number of the sliding groups is consistent with the number of the intercepting components and corresponds one to one, and the sliding group includes two sliding grooves;

[0060] Two sliding grooves are symmetrically arranged in the second passage, and the sliding blocks are slidably arranged in the sliding grooves;

[0061] The interception assembly also includes a reset rope;

[0062] There are two reset ropes, which correspond to the two sliders one by one. The reset rope is fixed to one side of the slider, and one end of the reset rope away from the slider is fixed to the side of the sliding groove close to the clamping assembly;

[0063] The reset rope is an elastic rope.

[0064] As an improvement, the length direction of the sliding groove is parallel to the extension and retraction direction of the limiting rod, and the length direction of the sliding groove is the sliding direction of the slider.

[0065] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0066] Firstly, by adding an electromagnet and an iron sheet, the position of the locking member can be adjusted to prevent the locking member from not fully rotating when the wire is extended to the lowest end of the through-port and contacts the conductive member, resulting in the limit rod being unable to be inserted into the limit groove, thereby limiting the position of the locking member and the wire; at the same time, torsion springs are added at both ends of the rotating connection of the locking member, and the initial position of the locking member is limited by the torsion springs, thereby preventing the device from being unable to be used normally due to the rotation of the device as a whole;

[0067] Secondly, by adding the second iron sheet, the second iron sheet is connected to the first iron sheet through rubber. Under the continuous adsorption of the electromagnet, the second iron sheet can be pulled for a distance and continuously extend downward to resist the fixing ring, thereby improving the fixing effect of the wire;

[0068] Thirdly, the swing plate swings by inflating and deflating the airbag, contacts the wire, and continuously adjusts the position of the wire to prevent the wire from tilting; at the same time, the wire can be clamped by the expansion of the airbag to improve the fixing effect of the wire; when the device is used for a long time, the inflation and deflation of the airbag causes the swing plate to swing continuously, fanning the air inside, which can cool the wire and increase its service life, and at the same time fan off the attached dust to improve the conductive and heat dissipation effect of the wire;

[0069] Fourthly, the locking piece is slidably connected. After the wire is fixed and limited, the locking piece can move to one side of the wire through the elastic force of the spring, continuously pressing the wire, thereby further improving the fixing effect of the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 This is a stereoscopic diagram of the installation of a wire loosening-proof intelligent circuit breaker fixing assembly of the present invention;

[0071] Figure 2 A three-dimensional cross-sectional view of a fixing shell of a wire-loosening-proof intelligent circuit breaker of the present invention;

[0072] Figure 3 It is a right side cross-sectional view of a fixed housing of a wire-loosening-proof intelligent circuit breaker of the present invention;

[0073] Figure 4 This is a schematic diagram of the structure of an interception component of a wire loosening-proof intelligent circuit breaker of the present invention;

[0074] Figure 5 It is a schematic diagram of the state of the interception component of the wire loosening prevention type intelligent circuit breaker of the present invention against the locking component;

[0075] Figure 6 This invention is a kind of intelligent circuit breaker for preventing loosening of wires Figure 5 A magnified view of the structure at inner A;

[0076] Figure 7 This is a structural schematic diagram of a wire loosening-proof intelligent circuit breaker locking assembly of the present invention;

[0077] Figure 8 This is a schematic diagram of the installation of a second iron sheet of a wire loosening-proof intelligent circuit breaker according to the present invention;

[0078] Fig. 9 This invention is a kind of intelligent circuit breaker for preventing loosening of wires Figure 8 A magnified view of the structure at inner B;

[0079] Fig.10 It is a schematic diagram of the state of the second iron sheet pulling the rubber of a wire loosening prevention type intelligent circuit breaker of the present invention;

[0080] Fig.11 This is a schematic diagram of the installation of a wire loosening-proof intelligent circuit breaker adjustment component of the present invention;

[0081] Fig.12 This invention is a kind of intelligent circuit breaker for preventing loosening of wires Fig.11 A magnified view of the structure at inner C;

[0082] Fig.13 Schematic diagram of the swing state of the swing plate of the wire loosening prevention type intelligent circuit breaker of the present invention Figure 1;

[0083] Fig.14 Schematic diagram of the swing state of the swing plate of the wire loosening prevention type intelligent circuit breaker of the present invention Figure 2 ;

[0084] Fig.15 Schematic diagram of the swing state of the swing plate of the wire loosening prevention type intelligent circuit breaker of the present invention Figure 3 ;

[0085] Fig.16 A schematic diagram of a sliding slot of a wire-loosening-proof intelligent circuit breaker of the present invention;

[0086] Fig.17 The present invention is a schematic diagram of the installation of a reset rope of a wire-loosening-proof intelligent circuit breaker.

[0087] In the figure: 100, circuit breaker body;

[0088] 200, fixed assembly; 210, fixed shell; 211, port 1; 212, port 2; 213, gas delivery channel 1; 214, sliding groove; 220, wire; 230, conductive member; 240, electromagnet; 250, power supply battery;

[0089] 300, clamping assembly; 310, sliding member; 311, sliding groove; 320, spring; 330, limiting rod; 340, pulling plate;

[0090] 400, interception component; 410, locking member; 411, groove 1; 412, limiting groove; 413, groove 2; 414, gas transmission channel 2; 420, slider; 430, reset rope; 440, iron sheet 1; 450, iron sheet 2;

[0091] 500, locking assembly; 510, fixing ring; 511, limiting opening; 520, deformation piece; 530, abutment bolt;

[0092] 600, adjustment component; 610, swing plate; 620, connecting plate; 630, air bag; 640, air pipe. DETAILED DESCRIPTION

[0093] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0094] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0095] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0096] Embodiment 1: Figure 1-Figure 7 , Fig.17 As shown, the present application is a wire loosening prevention type intelligent circuit breaker, comprising a circuit breaker body 100, a fixing assembly 200, a clamping assembly 300, an intercepting assembly 400 and a locking assembly 500;

[0097] The fixing assembly 200 is used to connect the circuit of the circuit breaker body 100. There are two fixing assemblies 200, which are symmetrically arranged at the upper and lower ends of the circuit breaker body 100.

[0098] The fixing assembly 200 includes a fixing shell 210, a first through-port 211, a second through-port 212 and a wire 220;

[0099] The number of the first openings 211 is consistent with the number of the second openings 212, and they correspond one to one;

[0100] The fixed shell 210 is fixed on the circuit breaker body 100. One side of the fixed shell 210 is provided with a second through-opening 212. There are a plurality of the second through-openings 212, which are evenly spaced. The second through-opening 212 has a first through-opening 211 on a side away from the circuit breaker body 100. The first through-opening 211 passes through the fixed shell 210. The connected first through-opening 211 and the second through-opening 212 form an L-shaped channel.

[0101] The number of the wires 220 is consistent with the number of the through-port 211, and they correspond one to one. One end of the wire 220 extends into the through-port 211. The number of the locking components 500 is consistent with the number of the wires 220, and they correspond one to one. The locking components 500 are arranged at one end of the wire 220 extending into the through-port 211.

[0102] The number of the interception components 400 and the clamping components 300 is consistent with the number of the second through-ports 212, and they correspond to the second through-ports 212 one by one.

[0103] The interception assembly 400 is used to limit the position of the wire 220. The interception assembly 400 includes a locking member 410 and a slider 420. The locking member 410 is cylindrical. The axis of the locking member 410 is perpendicular to the length direction of the second through-port 212. There are two sliders 420. The two sliders 420 are symmetrically arranged in the second through-port 212. The locking member 410 is located between the two sliders 420, and the two ends of the locking member 410 are rotatably connected to the two sliders 420 respectively.

[0104] The clamping assembly 300 is used to limit the position of the locking member 410. The clamping assembly 300 is disposed in the second through-port 212, and the clamping assembly 300 is located on a side of the locking member 410 close to the opening of the second through-port 212.

[0105] The interception assembly 400 further includes a groove 411 and an iron sheet 440;

[0106] The locking member 410 is provided with a groove 411, and an iron sheet 440 is disposed on one side of the groove 411;

[0107] The fixing assembly 200 further includes an electromagnet 240, the number of the electromagnet 240 is consistent with the number of the second openings 212, and they correspond one to one;

[0108] The electromagnet 240 is disposed in the fixed housing 210 and is located below the second opening 212 and the locking member 410;

[0109] The length direction of the groove 1 411 is consistent with the axis of the locking member 410, the length of the groove 1 411 is consistent with the length of the axis direction of the locking member 410, and the cross section of the groove 1 411 is a right-angle sector;

[0110] The first through-port 211 and the second through-port 212 are both in the shape of a rectangular parallelepiped;

[0111] A torsion spring is sleeved on the rotating rod that the locking member 410 and the slider 420 are rotatably connected to, and the two ends of the torsion spring are respectively fixed on the locking member 410 and the slider 420. When the torsion spring on the rotating rod of the locking member 410 is not subjected to force, a groove 411 on one side of the locking member 410 is located above the side away from the clamping assembly 300.

[0112] When the torsion spring on the rotating rod of the locking member 410 is not under stress, the iron sheet 1 440 is located on the side of the groove 1 411 close to the clamping assembly 300;

[0113] The fixing assembly 200 further includes a conductive member 230 and a power supply battery 250. The conductive member 230 is fixed to one side of the second opening 212 close to the circuit breaker body 100. The conductive member 230 is electrically connected to the circuit breaker body 100.

[0114] A power supply battery 250 is detachably provided on one side of the fixed shell 210 away from the circuit breaker body 100. The number of the power supply batteries 250 is consistent with the number of the electromagnets 240 and they correspond one to one. The power supply batteries 250 are electrically connected to the electromagnets 240.

[0115] When the wire 220 extends from the first opening 211 to the second opening 212 and reaches the deepest point, the wire 220 contacts the conductive member 230;

[0116] The clamping assembly 300 includes a sliding member 310, a sliding groove 311, a spring 320, a limiting rod 330 and a pulling plate 340;

[0117] The sliding member 310 is in the shape of a rectangular parallelepiped, and the two sides of the sliding member 310 are fixed on the two sides of the inner wall of the second opening 212. The sliding member 310 is provided with a slide groove 311, and the slide groove 311 is in the shape of a cylinder. The axis of the slide groove 311 is parallel to the length direction of the second opening 212. The limiting rod 330 is in the shape of a cylinder matched with the slide groove 311. The limiting rod 330 is slidably connected in the slide groove 311, and one end of the limiting rod 330 close to the locking member 410 abuts against the outer wall of the locking member 410.

[0118] The spring 320 is fixed to a side of the sliding member 310 away from the locking member 410, the spring 320 is sleeved on the limiting rod 330, and the pull plate 340 is fixed to an end of the spring 320 and the limiting rod 330 away from the locking member 410;

[0119] The interception assembly 400 further includes a limiting groove 412. The outer wall of the locking member 410 is provided with the limiting groove 412. The limiting groove 412 is cylindrical in shape and matches the limiting rod 330. The axis of the limiting groove 412 is perpendicular to the axis of the locking member 410.

[0120] When the torsion spring on the rotating rod of the locking member 410 is not under stress, the limiting groove 412 is located at the lower end of the locking member 410;

[0121] The locking assembly 500 includes a fixing ring 510, a limiting opening 511, a deformable sheet 520 and an abutment bolt 530;

[0122] The fixing ring 510 is arc-shaped and penetrates along the arc length direction, and the two ends of the deformation piece 520 are respectively inserted into the two ends of the arc length cavity of the fixing ring 510;

[0123] There are two limit openings 511 and two abutment bolts 530, respectively, and they correspond to each other. The side of the fixing ring 510 away from the axis thereof has a limit opening 511, and the two limit openings 511 are symmetrically arranged.

[0124] The abutment bolt 530 is threadedly connected in the limiting opening 511, and the two abutment bolts 530 abut against two ends of the deformation sheet 520 respectively;

[0125] The wire 220 is located between the fixing ring 510 and the deformable sheet 520, and one end of the wire 220 extending into the through-port 1 211 is flush with one end of the fixing ring 510 close to the conductive member 230;

[0126] The fixing ring 510 is made of a conductive material, and the deformable sheet 520 is made of a plastic deformable material;

[0127] When the wire 220 extends into the first through-hole 211 and the second through-hole 212, the lower end of the wire 220 can contact the groove 1 411 on the locking member 410;

[0128] When the wire 220 extends into the first through-port 211 and contacts the second through-port 212 and the locking member 410 rotates, the electromagnet 240 is activated to attract the first iron sheet 440. When the locking member 410 rotates 90 degrees, the limiting rod 330 is inserted into the limiting groove 412, and the lower end of the wire 220 contacts the conductive member 230, and the groove 411 of the locking member 410 contacts the upper part of the fixing ring 510 and the wire 220.

[0129] The length of the fixing ring 510 in the axial direction is consistent with the distance from the axis of the locking member 410 to the second opening 212 close to the side wall of the circuit breaker body 100 .

[0130] During use, first fix the locking assembly 500 on one end of the wire 220, place the wire 220 in the fixing ring 510, and insert the two ends of the deformation piece 520 into the cavities at the two ends of the fixing ring 510, and continuously press the deformation piece 520 to continuously reduce the distance between the deformation piece 520 and the fixing ring 510 and the wire 220, and then thread the abutment bolt 530 in the limit opening 511 so that one end of the abutment bolt 530 abuts on the deformation piece 520 to firmly fix the wire 220; then extend the wire 220 into the through-port 1 211, during this process, the deformation piece 520 is close to the side of the through-port 1 211 away from the locking piece 410, and the fixing ring 510 is toward the side close to the locking piece 410. When continuously extending inward, the wire 220 and the fixing ring 510 abut against the groove 1 411 of the locking piece 410, so that the locking piece 410 410 is rotated as a whole, and when the lower end of the wire 220 hits the conductive member 230, the electromagnet 240 is powered on and started, and the iron sheet 440 is attracted, so that the locking member 410 that has not been fully rotated rotates again, and the locking member 410 hits the fixing ring 510 and the wire 220 through the groove 411, clamping the position of the wire 220, and at the same time, the limiting rod 330 extends into the limiting groove 412 to limit the position of the locking member 410, and then the electromagnet 240 is powered off; when it is necessary to remove the wire 220, the pull plate 340 is manually pulled to disengage the limiting rod 330 from the limiting groove 412, and the restriction on the position of the locking member 410 is cancelled. When the wire 220 is manually pulled out of the through-port 211, the locking member 410 is reset by rotating the torsion spring at the connection; the power supply battery 250 can be removed and replaced when the power becomes weak due to long-term use.

[0131] Compared with the prior art, by adding an electromagnet 240 and an iron sheet 440, the position of the locking piece 410 can be adjusted to prevent the locking piece 410 from not fully rotating when the wire 220 extends into the lowest end of the through-port 211 and contacts the conductive piece 230, resulting in the limit rod 330 being unable to be inserted into the limit groove 412, thereby limiting the position of the locking piece 410 and the wire 220; at the same time, torsion springs are added to both ends of the rotating connection of the locking piece 410, and the initial position of the locking piece 410 is limited by the torsion springs to prevent the device as a whole from being unable to be used normally due to the rotation of the device as a whole.

[0132] Embodiment 2: When the embodiment 1 is used, the position of the wire 220 is fixed only by the rotating locking member 410 and the groove 411 on the locking member 410, and the fixing effect is poor. Based on this, the solution of the embodiment 1 is improved, such as Figure 8-Figure 10 As shown:

[0133] The interception assembly 400 further includes a second groove 413 and a second iron sheet 450;

[0134] When the torsion spring on the rotating rod of the locking member 410 is not under stress, the groove 1 411 is provided with a groove 2 413 on the side perpendicular to the extension direction of the limiting rod 330, and the iron sheet 1 440 is fixed on the side of the groove 2 413 away from its opening;

[0135] The second iron sheet 450 is disposed on a side of the first iron sheet 440 close to the opening of the second groove 413, and the first iron sheet 440 and the second iron sheet 450 are connected by rubber;

[0136] When the first groove 411 of the locking member 410 contacts the fixing ring 510 , the second iron piece 450 contacts the fixing ring 510 together.

[0137] When the lower end of the wire 220 hits the conductive member 230, the electromagnet 240 is powered on and started, and can adsorb the iron sheet 1 440 and the iron sheet 2 450. The groove 1 411 and the iron sheet 2 450 hit the fixing ring 510 together. At this time, the limiting rod 330 has been inserted into the limiting groove 412 to limit the position of the locking member 410. After that, the electromagnet 240 is powered on and continues to adsorb the iron sheet 1 440 and the iron sheet 2 450. Since the iron sheet 2 450 and the iron sheet 1 440 are connected by rubber, the iron sheet 2 450 can be pulled a certain distance and continuously extend downward to hit the fixing ring 510.

[0138] By adding the second iron sheet 450 , the second iron sheet 450 is connected to the first iron sheet 440 through rubber. Under the continuous adsorption of the electromagnet 240 , the second iron sheet 450 can be pulled a certain distance and continuously extend downward to resist the fixing ring 510 , thereby improving the fixing effect on the wire 220 .

[0139] Embodiment 3: When the embodiment 2 is in use, since it is manually installed, the wire 220 will tilt during the extension process. At the same time, the hardness of the wire 220 is relatively low. When the lower end hits the conductive member 230, it will be pressed downward for a distance, causing the tilt. The tilted wire 220 may not be evenly and tightly fixed by the locking member 410, affecting the reliability of the connection; at the same time, the actual contact area between the wire 220 and the conductive member 230 after the tilt is reduced, which will affect the current conduction efficiency, increase the contact resistance, and thus generate more heat. Long-term operation may cause overheating problems. Based on this, the solution of the embodiment 2 is improved, such as Figure 11-Figure 15 As shown:

[0140] The fixing assembly 200 further includes an air delivery channel 1 213;

[0141] The number of the gas delivery channels 213 is consistent with the number of the interception components 400, and they correspond one to one;

[0142] The fixed shell 210 has an air delivery channel 1 213 in it, one end of the air delivery channel 1 213 is connected to the second opening 212, and the end of the air delivery channel 1 213 away from the second opening 212 passes through the fixed shell 210;

[0143] One end of the air delivery channel 1 213 away from the second opening 212 is connected to the inflation mechanism;

[0144] It also includes an adjustment assembly 600, which includes a swing plate 610, a connecting plate 620, an air bag 630 and an air delivery pipe 640;

[0145] When the torsion spring on the rotating rod of the locking member 410 is not under stress, the fixing groove 411 of the connecting plate 620 is parallel to the side of the extension direction of the limiting rod 330, and the connecting plate 620 is made of rubber;

[0146] There are two swing plates 610 and two air bags 630, respectively, which correspond to the two ends of the connecting plate 620;

[0147] The swing plate 610 is fixed at both ends of the connecting plate 620, the airbag 630 is fixed between the swing plate 610 and the groove 1 411, and the airbag 630 is fixed on the side of the groove 1 411 parallel to the extension direction of the limit rod 330, and the two airbags 630 are connected to each other;

[0148] One end of the gas delivery pipe 640 is fixed to one end of the gas delivery channel 1 213 located in the second opening 212;

[0149] The interception assembly 400 further includes a gas delivery channel 2 414;

[0150] The locking member 410 has a second air delivery channel 414 in it, one end of the second air delivery channel 414 is connected to the air bag 630, and one end of the air delivery pipe 640 away from the first air delivery channel 213 is fixed to the other end of the second air delivery channel 414 away from the air bag 630;

[0151] The gas delivery pipe 640 is a telescopic hose;

[0152] The inflation mechanism is prior art and will not be described in detail here.

[0153] When the wire 220 extends from the opening 211 and hits the locking member 410, the inflation mechanism is turned on, and the inflation mechanism continuously inflates and deflates the airbag 630, so that the swing plate 610 continuously swings, hits the wire 220, and fans to adjust the position of the wire 220. After the limiting rod 330 is inserted into the limiting groove 412 to limit the position of the locking member 410, the airbag 630 is continuously inflated so that the airbag 630 and the swing plate 610 clamp the wire 220; at the same time, when the device is used for a long time and the connection of the wire 220 is heated, the airbag 630 can be inflated and deflated, so that the swing plate 610 continuously swings, fans the air inside, cools the wire 220, and fans off the attached dust.

[0154] By inflating and deflating the airbag 630, the swing plate 610 swings, contacts the wire 220, and continuously adjusts the position of the wire 220, thereby preventing the wire 220 from tilting; at the same time, by the expansion of the airbag 630, the wire 220 can be clamped to improve the fixing effect of the wire 220; when the device is used for a long time, the inflation and deflation of the airbag 630 causes the swing plate 610 to continuously swing, fanning the air inside, which can cool the wire 220 and increase its service life, while fanning off the attached dust and improving the conductivity and heat dissipation effect of the wire 220.

[0155] Embodiment 4: When the embodiment 3 is in use, the airbag 630 is expanded to improve the clamping effect of the wire 220. However, the device can also be improved to improve the clamping and fixing effect of the wire 220. Based on this, the solution of the embodiment 3 is improved, such as Figure 16-Figure 17 As shown:

[0156] The fixing assembly 200 also includes a sliding group;

[0157] The number of the sliding groups is consistent with the number of the interception components 400, and corresponds one to one. The sliding group includes two sliding grooves 214:

[0158] Two sliding grooves 214 are symmetrically arranged in the second opening 212, and the slider 420 is slidably arranged in the sliding grooves 214;

[0159] The length direction of the sliding slot 214 is parallel to the extension direction of the limiting rod 330, and the length direction of the sliding slot 214 is the sliding direction of the slider 420;

[0160] The interception assembly 400 further includes a reset rope 430;

[0161] There are two reset ropes 430, which correspond to the two sliders 420 one by one. The reset rope 430 is fixed to one side of the slider 420, and one end of the reset rope 430 away from the slider 420 is fixed to one side of the sliding groove 214 close to the clamping assembly 300;

[0162] The reset cord 430 is an elastic cord.

[0163] Before inserting the wire 220 into the through-port 1 211, the pull plate 340 is manually pulled first so that the limit rod 330 does not contact the locking member 410, and the locking member 410 is reset through the reset rope 430; the wire 220 is inserted into the through-port 1 211, and continuously extended inwardly, contacting the groove 1 411 of the locking member 410, so that the locking member 410 rotates, and when the lower end of the wire 220 contacts the conductive member 230, the electromagnet 240 is powered on and started, and the iron sheet 1 440 is attracted, so that the locking member 410 that has not been fully rotated rotates again, and the locking member 410 contacts the fixing ring 510 and the wire 220 through the groove 1 411, and the iron sheet 2 450 contacts the fixing ring 510. The position of the wire 220 is limited. At this time, the pull plate 340 is manually released, and the limiting rod 330 extends into the limiting groove 412 through the elastic force of the spring 320, and resists the locking member 410 to move to the side close to the wire 220, so that the locking member 410 continuously squeezes the wire 220; when the wire 220 needs to be removed, the pull plate 340 is manually pulled to disengage the limiting rod 330 from the limiting groove 412, and the restriction on the position of the locking member 410 is cancelled. At the same time, the locking member 410 is reset by the elastic force of the reset rope 430, which is convenient for the next use. When the wire 220 is manually pulled out of the through-port 211, the locking member 410 is reset by rotating the torsion spring at the rotating connection.

[0164] The locking member 410 is slidably connected. After the wire 220 is fixed and limited, the locking member 410 can move to one side of the wire 220 through the elastic force 320 of the spring, and continuously press the wire 220, thereby further improving the fixing effect of the wire 220.

[0165] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wire loosening prevention type intelligent circuit breaker, comprising a circuit breaker body (100), a fixing assembly (200), a clamping assembly (300), an intercepting assembly (400) and a locking assembly (500); The fixing assembly (200) is used to connect the circuit of the circuit breaker body (100), and there are two fixing assemblies (200), which are symmetrically arranged at the upper and lower ends of the circuit breaker body (100); The fixing assembly (200) comprises a fixing shell (210), a first through-port (211), a second through-port (212) and a wire (220); The number of the first openings (211) is consistent with the number of the second openings (212), and they correspond one to one; The fixed shell (210) is fixed on the circuit breaker body (100), one side of the fixed shell (210) is provided with a second through-opening (212), there are a plurality of the second through-openings (212) which are evenly spaced, the second through-opening (212) is provided with a first through-opening (211) on a side away from the circuit breaker body (100), the first through-opening (211) passes through the fixed shell (210), and the connected first through-opening (211) and the second through-opening (212) form an L-shaped channel; The number of the wires (220) is consistent with the number of the through-ports (211), and they correspond one to one. One end of the wire (220) extends into the through-port (211); the number of the locking assemblies (500) is consistent with the number of the wires (220), and they correspond one to one. The locking assemblies (500) are arranged at one end of the wire (220) extending into the through-port (211); The number of the interception components (400) and the clamping components (300) is consistent with the number of the second openings (212), and they correspond one-to-one to the second openings (212); The interception assembly (400) is used to limit the position of the wire (220), and the interception assembly (400) comprises a locking member (410) and a slider (420), wherein there are two sliders (420), and the two sliders (420) are symmetrically arranged in the second passage (212), the locking member (410) is located between the two sliders (420), and the two ends of the locking member (410) are respectively rotatably connected to the two sliders (420); The clamping assembly (300) is used to limit the position of the locking member (410), and the clamping assembly (300) is arranged in the second through-port (212), and the clamping assembly (300) is located on a side of the locking member (410) close to the opening of the second through-port (212); It is characterized in that The interception assembly (400) further comprises a groove one (411) and an iron sheet one (440); The locking member (410) is provided with a groove one (411), and an iron sheet one (440) is arranged on one side of the groove one (411); The fixing assembly (200) further comprises an electromagnet (240), wherein the number of the electromagnets (240) is consistent with the number of the second openings (212), and the number of the electromagnets (240) is one-to-one corresponding to the number of the second openings (212); The electromagnet (240) is disposed in the fixed shell (210) and is located below the second opening (212) and the locking member (410).

2. A wire loosening prevention type intelligent circuit breaker as claimed in claim 1, characterized in that: The locking member (410) is cylindrical, and the axis of the locking member (410) is perpendicular to the length direction of the second opening (212); The length direction of the groove 1 (411) is consistent with the axis of the locking member (410), the length of the groove 1 (411) is consistent with the length of the axis direction of the locking member (410), and the cross-section of the groove 1 (411) is a right-angled sector; The first through-port (211) and the second through-port (212) are both in the shape of a rectangular parallelepiped; A torsion spring is sleeved on the rotating rod that rotatably connects the locking member (410) and the slider (420), and the two ends of the torsion spring are respectively fixed on the locking member (410) and the slider (420). When the torsion spring on the rotating rod of the locking member (410) is not subjected to force, a groove (411) on one side of the locking member (410) is located above the side away from the clamping assembly (300); When the torsion spring on the rotating rod of the locking member (410) is in a state without being stressed, the iron sheet 1 (440) is located on the side of the groove 1 (411) close to the clamping assembly (300).

3. A wire loosening prevention type intelligent circuit breaker as claimed in claim 1, characterized in that: The fixing assembly (200) further comprises a conductive member (230) and a power supply battery (250); the conductive member (230) is fixed on a side of the second opening (212) close to the circuit breaker body (100); and the conductive member (230) is electrically connected to the circuit breaker body (100); A power supply battery (250) is detachably provided on a side of the fixed shell (210) away from the circuit breaker body (100); the number of the power supply batteries (250) is consistent with the number of the electromagnets (240), and they correspond one to one; the power supply battery (250) is electrically connected to the electromagnets (240); The clamping assembly (300) comprises a sliding member (310), a sliding groove (311), a spring (320), a limiting rod (330) and a pulling plate (340); The sliding member (310) is in the shape of a rectangular parallelepiped, and the two sides of the sliding member (310) are fixed on the two sides of the inner wall of the second opening (212). The sliding member (310) is provided with a slide groove (311), and the slide groove (311) is in the shape of a cylinder. The axis of the slide groove (311) is parallel to the length direction of the second opening (212). The limiting rod (330) is in the shape of a cylinder matched with the slide groove (311), and the limiting rod (330) is slidably connected in the slide groove (311), and one end of the limiting rod (330) close to the locking member (410) abuts against the outer wall of the locking member (410); The spring (320) is fixed to a side of the sliding member (310) away from the locking member (410), the spring (320) is sleeved on the limiting rod (330), and the pulling plate (340) is fixed to an end of the spring (320) and the limiting rod (330) away from the locking member (410); The interception assembly (400) further comprises a limiting groove (412), the outer wall of the locking member (410) is provided with the limiting groove (412), the limiting groove (412) is cylindrical in shape and matches the limiting rod (330), and the axis of the limiting groove (412) is perpendicular to the axis of the locking member (410); The locking assembly (500) comprises a fixing ring (510), a limiting opening (511), a deformation sheet (520) and an abutment bolt (530): The fixing ring (510) is arc-shaped, and the fixing ring (510) is penetrated along the arc length direction, and the two ends of the deformation sheet (520) are respectively inserted into the two ends of the arc length cavity of the fixing ring (510); There are two limit openings (511) and two abutment bolts (530), respectively, and they correspond to each other one by one. The side of the fixing ring (510) away from the axis thereof is provided with a limit opening (511), and the two limit openings (511) are symmetrically arranged. The abutment bolt (530) is threadedly connected in the limiting opening (511), and the two abutment bolts (530) respectively abut against two ends of the deformation sheet (520); The conductive wire (220) is located between the fixing ring (510) and the deformable sheet (520), and one end of the conductive wire (220) extending into the first through-port (211) is flush with one end of the fixing ring (510) close to the conductive member (230); The fixing ring (510) is made of a conductive material, and the deformable sheet (520) is made of a plastic deformable material.

4. A wire loosening prevention type intelligent circuit breaker as claimed in claim 3, characterized in that: When the wire (220) extends from the first opening (211) into the second opening (212) and reaches the deepest point, the wire (220) contacts the conductive member (230): When the torsion spring on the rotating rod of the locking member (410) is in a state without being subjected to stress, the limiting groove (412) is located at the lower end of the locking member (410).

5. A wire loosening prevention type intelligent circuit breaker as claimed in claim 3, characterized in that: When the wire (220) extends into the first opening (211) and the second opening (212), the lower end of the wire (220) can contact the first groove (411) on the locking member (410); When the wire (220) extends into the first opening (211) and the second opening (212) contacts the locking member (410) and rotates, the electromagnet (240) is activated to attract the first iron sheet (440); when the locking member (410) rotates 90 degrees, the limiting rod (330) is inserted into the limiting groove (412), the lower end of the wire (220) contacts the conductive member (230), and the groove (411) of the locking member (410) contacts the upper part of the fixing ring (510) and the wire (220); The length of the fixing ring (510) in the axial direction is consistent with the distance from the axis of the locking member (410) to the second passage (212) close to the side wall of the circuit breaker body (100).

6. The wire loosening prevention type intelligent circuit breaker according to claim 1, characterized in that: The interception assembly (400) further includes a second groove (413) and a second iron sheet (450); When the torsion spring on the rotating rod of the locking member (410) is not subjected to stress, the side surface of the groove 1 (411) perpendicular to the extension direction of the limiting rod (330) is provided with a groove 2 (413), and the iron sheet 1 (440) is fixed on the side of the groove 2 (413) away from its opening; The second iron sheet (450) is arranged on a side of the first iron sheet (440) close to the opening of the second groove (413), and the first iron sheet (440) and the second iron sheet (450) are connected by rubber.

7. A wire loosening prevention type intelligent circuit breaker as claimed in claim 6, characterized in that: When the first groove (411) of the locking member (410) contacts the fixing ring (510), the second iron sheet (450) also contacts the fixing ring (510).

8. The wire loosening prevention type intelligent circuit breaker according to claim 6, characterized in that: The fixing assembly (200) further comprises an air delivery channel 1 (213); The number of the gas delivery channels 1 (213) is consistent with the number of the interception components (400), and they correspond one to one; The fixed shell (210) is provided with an air delivery channel 1 (213), one end of the air delivery channel 1 (213) is connected to the second opening (212), and the end of the air delivery channel 1 (213) away from the second opening (212) passes through the fixed shell (210); One end of the air delivery channel 1 (213) away from the opening 2 (212) is connected to the inflation mechanism; It also includes an adjustment component (600), wherein the adjustment component (600) includes a swing plate (610), a connecting plate (620), an air bag (630) and an air delivery pipe (640); When the torsion spring on the rotating rod of the locking member (410) is not subjected to stress, the connecting plate (620) is fixed on a side surface of the groove 1 (411) parallel to the extension direction of the limiting rod (330), and the connecting plate (620) is made of rubber; There are two swing plates (610) and two air bags (630), respectively, which correspond to the two ends of the connecting plate (620); The swing plate (610) is fixed at both ends of the connecting plate (620), the airbag (630) is fixed between the swing plate (610) and the groove one (411), and the airbag (630) is fixed on the side of the groove one (411) parallel to the extension direction of the limit rod (330), and the two airbags (630) are connected to each other; One end of the gas delivery pipe (640) is fixed to one end of the gas delivery channel 1 (213) located in the second opening (212); The interception assembly (400) further includes a second gas delivery channel (414); The locking member (410) has a second air delivery channel (414) therein, one end of the second air delivery channel (414) is in communication with the air bag (630), and one end of the air delivery pipe (640) away from the first air delivery channel (213) is fixed to one end of the second air delivery channel (414) away from the air bag (630); The air delivery pipe (640) is a telescopic hose.

9. A wire loosening prevention type intelligent circuit breaker as claimed in claim 8, characterized in that: The fixing assembly (200) further comprises a sliding group; The number of the sliding groups is consistent with the number of the interception components (400) and corresponds one to one, and the sliding group includes two sliding grooves (214); Two sliding grooves (214) are symmetrically arranged in the second passage (212), and the sliding block (420) is slidably arranged in the sliding grooves (214); The interception assembly (400) further includes a reset rope (430); There are two reset ropes (430), which correspond to the two sliders (420) one by one. The reset rope (430) is fixed to one side of the slider (420), and one end of the reset rope (430) away from the slider (420) is fixed to one side of the sliding groove (214) close to the clamping assembly (300); The reset rope (430) is an elastic rope.

10. A wire loosening prevention type intelligent circuit breaker as claimed in claim 9, characterized in that: The length direction of the sliding groove (214) is parallel to the extension and retraction direction of the limiting rod (330), and the length direction of the sliding groove (214) is the sliding direction of the sliding block (420).

Citation Information

Patent Citations

  • breaker

    CN114597103B

  • Semi-spherical camera with adjustable visual range orientation

    CN107404610A

  • Circuit breaker

    CN114597103A

  • Relay with self-locking structure

    CN117219468A

  • Circuit breaker connecting device

    CN218182147U