Interlocking device and interlocking structure of contactor

Abstract

The interlocking structure of the contactors comprises two contactors and the interlocking device, the interlocking device comprises a locking structure, and the locking structure comprises two locking parts which are oppositely arranged and used for being inserted into the contactors on the two sides to prevent the two contactors from being switched on at the same time. The interlocking device further comprises a mounting seat and a rotating seat rotationally arranged on the mounting seat, the locking structure is movably arranged on the rotating seat, the rotating seat can rotate between at least two positions, when the rotating seat rotates to one position, the two locking parts of the locking structure are driven to retract into the mounting seat, and when the rotating seat rotates to the other position, the two locking parts of the locking structure are driven to retract into the mounting seat. When the rotating seat rotates to the other position, the two locking parts of the locking structure are driven to rotate to the outside of the mounting seat to be inserted into the contactors on the two sides, and the interlocking device can be directly mounted and dismounted without dismounting the contactors.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and particularly to an interlocking device and an interlocking structure of a contactor. Background Art

[0002] Contactors are commonly used to control the on-off of circuits. When two contactors are used to control two circuits respectively and it is necessary to prevent the two circuits from being turned on simultaneously, the two contactors can be interlocked through an interlocking device. When one contactor turns on the circuit, the other contactor is locked in a non-conductive state through the interlocking device, preventing the two contactors from turning on the circuit simultaneously. Existing interlocks usually have two installation methods: direct installation and indirect installation.

[0003] For direct installation, the two contactors used for interlocking are first fixed on the installation panel, and then the mechanical interlock is installed therein. The greatest advantage of this method is that the mechanical interlock can be replaced without disassembling the contactor and its accessories, thereby improving the operation and maintenance efficiency. However, the number and types of structural parts are numerous, and the processing technology is complex.

[0004] For indirect installation, one of the two contactors used for interlocking is first fixed on the installation panel, then the mechanical interlock is installed, and finally the other contactor is installed. However, if the mechanical interlock needs to be replaced, one of the contactors and its accessories need to be disassembled, the operation is cumbersome, and the operation and maintenance efficiency is low. Summary of the Invention

[0005] The purpose of the present invention is to overcome at least one defect of the prior art and provide an interlocking device and an interlocking structure of a contactor.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An interlocking device includes a locking structure, and the locking structure includes two relatively arranged locking parts for inserting into the contactors on both sides to prevent the two contactors from closing simultaneously.

[0008] The interlocking device further includes a mounting base and a rotating seat rotatably arranged on the mounting base. The locking structure is movably arranged on the rotating seat, and the rotating seat can rotate between at least two positions. When the rotating seat rotates to one of the positions, it drives the two locking parts of the locking structure to retract into the mounting base. When the rotating seat rotates to another position, it drives the two locking parts of the locking structure to rotate outside the mounting base for inserting into the contactors on both sides.

[0009] Preferably, the locking structure includes a swinging member rotatably arranged on the rotating seat. Two locking parts are provided on the swinging member. When one contactor closes, it pushes the corresponding locking part, causing the swinging member to rotate and driving the other locking part to block the closing of the other contactor.

[0010] Preferably, the locking structure includes a sliding member linearly movably disposed on the rotating base. Locking portions are respectively provided at both ends of the sliding member along the moving direction. When one contactor is closed, it pushes the corresponding locking portion, causing the swinging member to linearly move and drive the other locking portion to block the closing of the other contactor.

[0011] Preferably, the locking structure includes two locking members respectively rotatably installed in the rotating base. The two locking members correspond to the two contactors respectively. Locking portions are respectively provided on the two locking members. When one contactor is closed, it pushes the locking portion of one locking member, causing this locking member to rotate and push the other locking member to rotate, so that the locking portion of the other locking member blocks the closing of the other contactor.

[0012] Preferably, it further includes a torsion spring for driving the rotation of the locking member. A limiting portion is provided on the locking member, and a blocking portion for blocking the limiting portion is provided on the rotating base. When the locking portion retracts into the mounting base, the torsion spring drives the limiting portion to contact the blocking portion. When the locking portion is inserted into the contactor, the torsion spring drives the locking portion to contact the contact support in the contactor.

[0013] Preferably, the locking member includes a pivoting portion rotatably connected to the rotating base and a swinging portion connected to the pivoting portion. Locking portions are respectively provided on the sides of the swinging portions of the two locking members that are away from each other. Pushing portions are respectively provided on the sides of the locking portions of the two locking members that are close to each other. When the locking portion is pushed by the contact support of the corresponding contactor, the swinging portion rotates and pushes the pushing portion of the other locking member through the pushing portion, causing the other locking member to rotate and drive the locking portion to lock the other contactor in a state where it cannot be closed.

[0014] Preferably, the pivoting portion is disposed at the bottom side of the swinging portion along the height direction of the contactor.

[0015] Preferably, a pivoting hole for passing through the pivot shaft is provided on the pivoting portion. Both ends of the pivot shaft are fixedly connected to the rotating base. The pivoting hole is sleeved on the middle of the pivot shaft. A torsion spring is provided on the side surface of the locking member. The locking member is provided with a spring portion cooperating with the torsion spring. The middle of the torsion spring is sleeved on the pivot shaft, and both ends of the torsion spring respectively contact the rotating base and the spring portion.

[0016] Preferably, the torsion spring is used to drive the swinging portion of the corresponding locking member to rotate in a direction away from the swinging portion of the other locking member. When the limiting portions of the two locking members respectively contact the corresponding blocking portions driven by the torsion spring, the pushing portions of the two locking members are spaced apart.

[0017] Preferably, the rotating seat can rotate between at least two positions, namely a first position and a second position. When the rotating seat rotates to the first position, the two locking parts rotate into the mounting seat. When the rotating seat rotates to the second position, the two locking parts rotate out of the mounting seat. When the rotating seat is in the first position, the line connecting the two locking parts of the locking structure is perpendicular to the line connecting the two locking parts of the locking structure when the rotating seat is in the second position.

[0018] Preferably, the rotating seat has a columnar structure, and the axis of the columnar structure is also the rotation axis of the rotating seat. The rotating seat is installed in the mounting seat and can rotate around its own axis. The rotating seat is provided with a locking structure installation groove for accommodating the locking structure. The locking structure installation groove penetrates the radial direction of the rotating seat. The locking structure is installed in the locking structure installation groove, and the two locking parts extend out of the locking structure installation groove along the radial direction of the rotating seat.

[0019] Preferably, the rotating seat includes a rotating part with a columnar structure. The rotating part is provided with the locking structure installation groove. The mounting seat is provided with a guiding groove and two avoiding grooves communicating with the guiding groove. The length direction of the guiding groove is arranged parallel to the direction in which the mounting seat is inserted between two contactors. The rotating part of the rotating seat is rotatably arranged in the guiding groove, and the two avoiding grooves are respectively used for accommodating the two locking parts.

[0020] Preferably, the rotating seat is provided with a boosting part. The boosting part is provided with a boosting protrusion. The mounting seat is provided with an elastic member for pushing the boosting part. When the rotating seat rotates, the boosting protrusion pushes and compresses the elastic member. After the elastic force exerted by the elastic member on the boosting protrusion crosses the rotation center of the boosting part, the elastic member pushes the rotating seat to continue rotating.

[0021] Preferably, the boosting part includes four boosting surfaces connected in sequence. The vertex positions of two adjacent boosting surfaces form the boosting protrusion. A sliding surface with a curved surface shape is provided at the top of the boosting protrusion. The elastic member includes two elastic rods arranged oppositely on both sides of the radial direction of the boosting part, and two elastic rings respectively connected to the two ends of the elastic rods. The mounting seat is provided with two fixed protrusions corresponding to the two elastic rings respectively. The two elastic rings are respectively sleeved on the corresponding fixed protrusions. The distance between the two elastic rods is greater than or equal to the distance between two opposite boosting surfaces and less than the distance between two sliding surfaces on the diagonal line. When the rotating seat rotates, the two boosting protrusions on the diagonal line drive the two elastic rods to be pushed outwards respectively and store energy for the two elastic rods. After the highest point of the boosting protrusion pushes the elastic rod and crosses the elastic rod, the elastic rod releases energy to push the rotating seat to continue rotating.

[0022] Preferably, the guiding groove includes a first guiding groove and a second guiding groove. An avoiding groove is provided between the first guiding groove and the second guiding groove. The first guiding groove and the second guiding groove are respectively matched with the two ends of the rotating seat.

[0023] Preferably, the mounting base includes two relatively arranged mounting members, each of the two mounting members is provided with the guiding groove, each mounting member is provided with two first guiding portions, and two second guiding portions respectively corresponding to the two first guiding portions. The second guiding portions are arranged on one side of the first guiding portions at intervals along the rotation axis of the rotating base. The two first guiding portions are respectively provided with first guiding surfaces in a curved surface shape on the side close to each other. The first guiding surfaces on the two first guiding portions are used to form the first guiding groove. The two second guiding portions are respectively provided with second guiding surfaces in a curved surface shape on the side close to each other. The second guiding surfaces on the two second guiding portions are used to form the second guiding groove.

[0024] Preferably, support plates are respectively arranged between the two first guiding portions and the corresponding second guiding portions. The distance between the two support plates is greater than the distance between the two first guiding portions and greater than the distance between the two second guiding portions. An avoidance groove is formed between the two support plates.

[0025] Preferably, the rotating base includes a rotating portion in a columnar structure and an operating portion arranged at one end of the rotating portion. An operating hole is provided on the operating portion, and a first mounting base hole corresponding to the operating portion is provided on the mounting base.

[0026] Preferably, the operating portion extends to the outside of the mounting base. The operating portion is provided with two limiting protrusions protruding radially. The mounting base is provided with two limiting bosses respectively corresponding to the two limiting protrusions. The limiting bosses are used to block the limiting protrusions to limit the rotation position of the rotating base through the operating portion.

[0027] Preferably, the rotating base includes two relatively arranged rotating members, and the two rotating members are spliced into the rotating base.

[0028] Preferably, locking plates are protrudingly provided on both sides in the radial direction of the rotating base. When the rotating base drives the locking portion to rotate so that the locking portion is inserted into the contactor, the locking plates can be driven to limit the position of the contactor at the same time.

[0029] Preferably, the mounting base is provided with a mounting groove for guiding and limiting on the side wall in close contact with the contactor.

[0030] Preferably, two elastic portions are respectively connected to the opposite sides of the mounting base. An elastic buckle is arranged at the connecting position of the two elastic portions. One end where the two elastic portions are connected is arranged at an interval from the mounting base. The two ends where the two elastic portions are away from each other are respectively connected to the mounting base. The elastic portions, the elastic buckle and the mounting base are integrally formed.

[0031] The interlocking device of the present invention creates a situation where the rotation of the rotating base drives the rotation of the two locking parts of the locking structure. When the two locking parts rotate and retract into the mounting base, the interlocking device can be directly installed and removed without disassembling the contactor. After the mounting base is installed in place, the rotating base is rotated to make the two locking parts rotate outside the mounting base and respectively inserted into the contactors on both sides, realizing the function of interlocking two contactors, which is convenient for installation and maintenance.

[0032] In addition, by setting two rotating locking parts, each locking part has a smaller diameter and a smaller rotation path, occupying less space. This not only facilitates the rotation and retraction / extension into and out of the mounting base but also reduces the volume of the entire interlocking device.

[0033] In addition, by setting the swinging part above the pivoting part, on the basis of the unchanged contact support height of the contactor, the space below the swinging part can be utilized, facilitating the installation of the rotating base and the installation of the mounting base and the contactor, thereby reducing the height of the interlocking device.

[0034] The present invention also provides an interlocking structure for contactors, which includes two contactors and the above-mentioned interlocking device. There is an installation space between the two contactors. The rotation of the rotating base drives the two locking parts of the locking structure to retract into the mounting base, and the mounting base is inserted into the installation space.

[0035] Preferably, the outer shells of the two contactors both include a lower shell and an upper shell. When the lower shells of the two contactors are in contact, there is the above-mentioned installation space between the upper shells of the two contactors.

[0036] Preferably, an electromagnetic system and a contact system are respectively provided in the two contactors. The contact system includes a moving contact and a static contact. The moving contact is arranged on a contact support driven by the electromagnetic system. The electromagnetic system includes a coil and an iron core controlled by the coil. The coil is used to drive the iron core to drive the moving contact to move. The outer shells of the two contactors are provided with interlocking holes for passing through the locking parts. The two locking parts of the locking structure are respectively matched with the contact supports of the two contactors. Locking holes for inserting the locking parts are provided on the contact supports. When one of the contactors is closed, the contact support pushes the corresponding locking part out of the locking hole of the contact support and makes the other locking part inserted into the locking hole of the contact support of the other contactor, blocking the movement of the contact support and locking the contactor in a non-closeable state.

[0037] The interlocking structure of the contactors of the present invention can directly install and remove the interlocking device without disassembling the contactors by setting the interlocking device, which is very convenient for installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic structural diagram of the reverse contactor of the present invention;

[0039] Figure 2 It is a top view of the reverse contactor of the present invention

[0040] Figure 3 It is a schematic structural diagram of the mounting base of the present invention

[0041] Figure 4 It is a schematic structural diagram of the rotating base of the present invention

[0042] Figure 5 It is the perspective view of the bottom of the mounting base when the two locking parts of the present invention retract into the mounting base

[0043] Figure 6 It is from Figure 5 to Figure 7 The transitional position where the rotating base of the present invention rotates

[0044] Figure 7 It is the perspective view of the bottom of the mounting base when the two locking parts of the present invention extend out of the mounting base

[0045] Figure 8 It is a schematic diagram of the cooperation between the locking structure and two contactors of the present invention

[0046] Figure 9 It is a schematic structural diagram of a single contactor of the present invention

[0047] Figure 10 It is an exploded view of the mounting base of the present invention

[0048] Figure 11 It is an exploded view of the rotating base of the present invention

[0049] Figure 12 It is a schematic diagram of the cooperation between the rotating part and the locking part of the present invention

[0050] Figure 13 It is a schematic structural diagram of the rotating part of the present invention

[0051] Figure 14 It is a schematic diagram of the cooperation between the operating part and the mounting base of the present invention

[0052] Figure 15 It is a schematic diagram of the cooperation between the mounting base and the contactor housing of the present invention

[0053] Figure 16 It is a schematic structural diagram of one of the mounting parts constituting the mounting base of the present invention

[0054] Figure 17 It is a schematic structural diagram of another mounting part constituting the mounting base of the present invention

[0055] In the figure, contactor 1; interlocking device 2; mounting base 3; rotating base 4; locking part 5; lower shell 11; upper shell 12; interlocking hole 13; baffle 14; installation space 15; contact support 16; guiding groove 31; rotating part 41; mounting part 32; operating part 42; boosting part 43; operating hole 44; boosting protrusion 45; elastic part 33; avoiding groove 34; rotating part 46; locking plate 47; locking part 51; pivoting part 52; swinging part 53; pushing part 54; pivot shaft 55; mounting hole 460; torsion spring 56; spring part 57; limiting part 58; blocking part 48; limiting protrusion 421; limiting boss 422; boosting surface 431; elastic rod 331; elastic ring 332; fixing boss 333; limiting rib 121; guide rail 122; guiding surface 123; mounting groove 301; elastic buckle 302; elastic part 303; first guiding groove 311; second guiding groove 312; first guiding part 321; second guiding part 322; support plate 323; first guiding surface 3210; second guiding surface 3220. Detailed implementation manners

[0056] The following embodiments given in conjunction with the accompanying drawings further illustrate the detailed implementation manners of the interlocking device of the present invention. The interlocking device of the present invention is not limited to the descriptions of the following embodiments.

[0057] As Figure 1-2 shown, the interlocking structure of the contactor in this embodiment includes at least two contactors 1 and an interlocking device 2 for interlocking at least two contactors 1. The interlocking device 2 includes a movable locking structure. When one of the contactors 1 is switched on, the locking structure locks the other contactor 1 in a state where it cannot be switched on, preventing the two contactors 1 from being switched on simultaneously.

[0058] As Figure 3-8 shown, an improvement point of this embodiment is that the interlocking device 2 includes a mounting base 3 and a rotating base 4 rotatably arranged on the mounting base 3. The locking structure is movably arranged on the rotating base 4. The rotating base 4 can rotate between at least two positions. The locking structure includes two relatively arranged locking parts 5. When the rotating base 4 rotates to one of the positions Figure 5 , it drives the two locking parts 5 of the locking structure to retract into the mounting base 3, enabling the mounting base 3 to be inserted between the two contactors 1. When the rotating base 4 rotates to another position Figure 7-8 , it drives the two locking parts 5 of the locking structure to rotate outside the mounting base 3 and respectively insert into the contactors 1 on both sides. When one of the contactors 1 is switched on, it pushes the corresponding locking part 5, causing the locking structure to move and driving the other locking part 5 to lock the other contactor 1 in a state where it cannot be switched on.

[0059] The interlocking device of this embodiment drives the two locking parts 5 of the locking structure to rotate through the rotating seat 4. When the two locking parts 5 rotate and retract into the mounting seat 3, the interlocking device 2 can be directly installed and disassembled without disassembling the contactor 1. After the mounting seat 3 is installed in place, the rotating seat 4 is rotated to make the two locking parts 5 rotate outside the mounting seat 3 and respectively inserted into the contactors 1 on both sides, realizing the function of interlocking the two contactors 1, which is convenient for installation and maintenance.

[0060] The interlocking structure of the contactor in this embodiment can directly install and disassemble the interlocking device 2 without disassembling the contactor 1 by setting the interlocking device 2, and both installation and maintenance are very convenient.

[0061] As Figure 9 shown, the two contactors 1 in this embodiment have the same structure, and there is an installation space 15 between the two contactors 1. The rotating seat 4 drives the two locking parts 5 of the locking structure to retract into the mounting seat 3, so that the mounting seat 3 is inserted into the installation space 15. Each of the two contactors 1 includes a housing, and the housing includes a lower housing 11 and an upper housing 12. An electromagnetic system and a contact system are respectively arranged in the lower housing 11 and the upper housing 12. Wiring terminals are respectively arranged at both ends of the lower housing 11 and the upper housing 12. The contact system in the upper housing 12 includes a moving contact and two static contacts. The two static contacts are respectively connected to the first line through the wiring terminals at both ends. The moving contact is arranged on a contact support 16 driven by the electromagnetic system. The electromagnetic system in the lower housing 11 includes a coil and an iron core controlled by the coil. The coil is connected to the second line through the wiring terminals at both ends. The coil is used to drive the iron core to drive the moving contact to move, so that the moving contact contacts and separates from the static contact, thereby conducting and disconnecting the first line, realizing the closing and opening of the contactor 1. An interlocking hole 13 is provided on the side wall of the upper housing 12, and a detachable baffle 14 is arranged in the interlocking hole 13. After the baffle 14 is removed from the interlocking hole 13, it is used for the locking part 5 of the locking structure to pass through. The two locking parts 5 of the locking structure are respectively Figure 8 matched with the contact supports 16 of the two contactors 1. A locking hole (not shown in the figure) for inserting the locking part 5 is provided on the contact support 16. When one of the contactors 1 is closed, the contact support 16 drives the corresponding locking part 5 to move under the drive of the electromagnetic system, so that the locking part 5 moves away from the locking hole of the contact support 16, and the other locking part 5 is inserted into the locking hole of the contact support 16 of the other contactor 1. By blocking the movement of the contact support 16 of the other contactor 1, it is realized to prevent the moving contact from contacting the static contact, and further lock the other contactor 1 in the non-closing state to prevent the two contactors 1 from closing simultaneously.

[0062] Further, when the lower shells 11 of the two contactors 1 are in contact, there is an installation space 15 between the upper shells 12 of the two contactors 1. The mounting seat 3 is used to be inserted into the installation space 15. When the two locking parts 5 retract into the mounting seat 3, the line connecting the centers of the two locking parts 5 is arranged parallel to the length direction of the installation space 15, that is Figure 2 the up and down direction in Figure 2 and the mounting seat 3 is inserted into the installation space 15 along the direction perpendicular to the paper plane in

[0063] As Figure 3 、 4 shown, the rotating seat 4 is integrally in a columnar structure. The axis of the columnar structure is also the rotation axis of the rotating seat 4. The rotating seat 4 is installed in the mounting seat 3 and can rotate around its own axis. The rotating seat 4 is provided with a locking structure installation groove for accommodating the locking structure. The locking structure installation groove penetrates the radial direction of the rotating seat 4. The locking structure is installed in the locking structure installation groove, and the two locking parts 5 extend out of the locking structure installation groove along the radial direction of the rotating seat 4. Specifically, as Figure 4 shown, the rotating seat 4 includes a rotating part 41 in a columnar structure. The rotating part 41 is provided with the locking structure installation groove. An operating part 42 and an assisting part 43 are respectively provided at both ends of the rotation axis of the rotating part 41. Locking plates 47 are convexly provided on both sides of the rotating part 41 in the radial direction. The rotating seat 4 drives the locking part 5 to rotate, so that when the locking part 5 is inserted into the contactor 1, the locking plate 47 can be driven to limit the position of the contactor 1 at the same time.

[0064] As Figure 3 、 4 shown, the mounting seat 3 is provided with a guiding groove 31 and two avoiding grooves 34 communicated with the guiding groove 31. The length direction of the guiding groove 31 is arranged parallel to the direction in which the mounting seat 3 is inserted between the two contactors 1. The rotating part 41 of the rotating seat 4 is rotatably arranged in the guiding groove 31. The locking structure is arranged in the rotating part 41. The two locking parts 5 are oppositely arranged on both sides of the rotating part 41 along the direction perpendicular to the length direction of the guiding groove 31. The two avoiding grooves 34 are respectively used to accommodate the two locking parts 5. The side wall of the columnar structure of the rotating part 41 at least protects part of the arc side wall for cooperating with the guiding groove 31 to rotate.

[0065] The rotating seat 4 can rotate between at least two positions, where the two positions are the first position and the second position respectively. When the rotating seat 4 rotates to the first position, the two locking parts 5 retract into the mounting seat 3 and are respectively located in the two avoiding grooves 34 for reference Figure 3 、 5 ; when the rotating seat 4 rotates to the second position, the two locking parts 5 extend out of the mounting seat 3 for reference Figure 6, when the rotary seat 4 is in the first position, the line connecting the two locking parts 5 of the locking structure is perpendicular to the line connecting the two locking parts 5 of the locking structure when the rotary seat 4 is in the second position. For example, the rotary seat 4 can only rotate between two positions and can only rotate within a range of 90 degrees in the mounting seat 3. It can only rotate 90 degrees clockwise from the first position to the second position or rotate 90 degrees counterclockwise from the second position to the first position. In the mounting seat 3, a first limiting structure and / or a second limiting structure for limiting the rotation position of the rotary seat 4 are provided. The first limiting structure and / or the second limiting structure are protrusions or grooves provided in the guiding groove 31, etc. As other embodiments, the rotary seat 4 can rotate between four positions and can rotate 360 degrees. When the rotary seat 4 rotates 90 degrees, the two locking parts 5 of the locking structure rotate out of the mounting seat 3 to realize the interlocking of two contactors. When the rotary seat 4 rotates another 90 degrees, the two locking parts 5 rotate into the mounting seat 3 in turn and alternately.

[0066] Specifically, as Figure 3 , 4 , as shown in FIGS. 10, the mounting seat 3 includes two relatively arranged mounting members 32. The two mounting members 32 are connected by snap connections, which is convenient for the installation of the rotary seat 4. Each of the two mounting members 32 is provided with a guiding groove 31, and the two guiding grooves 31 are used to form the guiding groove 31. The rotary seat 4 includes a rotating part 41 rotatably arranged in the guiding groove 31, and an operating part 42 and a boosting part 43 oppositely arranged at both ends of the rotating part 41 along the rotation axis direction. The operating part 42 extends to the outside of the mounting seat 3. An operating hole 44 for inserting an operating tool is provided on the operating part 42. The mounting seat 3 is provided with a first mounting seat hole corresponding to the operating part 42. The boosting part 43 is provided with a boosting protrusion 45, and the mounting seat 3 is provided with an elastic member 33 for pushing the boosting part 43. The operating tool is inserted into the operating hole 44, and the rotary seat 4 is driven to rotate through the operating part 42. When the rotary seat 4 rotates, the elastic member 33 is pushed and compressed through the boosting protrusion 45. After the elastic force applied by the elastic member 33 to the boosting protrusion 45 passes through the rotation center of the boosting part 43, the elastic member 33 pushes the rotary seat 4 to continue rotating, so that the rotary seat 4 rotates quickly to the position. Of course, the operating part 42 and the boosting part 43 may not be provided, and the operating tool can be inserted into the mounting seat 3 to directly twist the rotating part 41 of the rotary seat 4, which all fall within the protection scope of the present invention.

[0067] Further, each of the two mounting members 32 is provided with an avoidance groove 34 communicating with the guiding groove 31. The two avoidance grooves 34 are respectively used to accommodate the two locking parts 5 and enable the locking parts 5 to rotate to the outside of the mounting seat 3. Of course, the avoidance groove 34 and the guiding groove 31 may not be provided, and the two ends of the rotary seat 4 may also be rotatably connected to the mounting seat 3, which all fall within the protection scope of the present invention. In this way, the rotary seat 4 can rotate depending on both ends, and the cross-section of the columnar structure of the rotating part 41 can be of any shape.

[0068] As shown Figure 11 in the figure, the rotating base 4 includes two relatively arranged rotating members 46. The two rotating members 46 are connected or clamped by screws to form the rotating base 4, so as to facilitate the installation of the locking structure. The locking structure is arranged between the two rotating members 46. The two rotating members 46 are respectively provided with locking plates 47. When the rotating base 4 drives the locking portion 5 to rotate and the locking portion 5 is inserted into the contactor 1 from the interlocking hole 13, the locking plate 47 can be driven to rotate and inserted into the interlocking hole 13 at the same time, so that the locking plate 47 abuts against the hole wall of the interlocking hole 13 for limiting, playing a role in limiting the rotation of the rotating base 4. Of course, a separate interlocking slot can also be provided at the position of the contactor 1 where the interlocking hole 13 is provided, for cooperating with the locking plate 47 to limit the position of the rotating base 4.

[0069] As shown Figure 12-13 in the first embodiment of the locking structure, the locking structure includes two locking members 51. The two locking members 51 are respectively rotatably installed inside the rotating base 4. The two locking members 51 correspond to the two contactors 1 respectively. The two locking members 51 are respectively provided with locking portions 5. When one of the contactors 1 is closed, the locking portion 5 of one of the locking members 51 is pushed, so that the locking member 51 rotates and pushes the other locking member 51 to rotate, so that the locking portion 5 of the other locking member 51 blocks the closing of the other contactor 1. By providing two rotating locking members 51, the diameter of each locking member 51 is smaller, the rotation path is also smaller, and the occupied space is small. It can not only facilitate the rotation and retraction of the installation base 3, but also reduce the volume of the entire interlocking device.

[0070] Further, the locking member 51 includes a pivot portion 52 rotatably connected to the rotating base 4 and a swing portion 53 connected to the pivot portion 52. The locking portions 5 are respectively provided on the mutually remote sides of the swing portions 53 of the two locking members 51. The pushing portions 54 are respectively provided on the mutually close sides of the locking portions 5 of the two locking members 51. When the locking portion 5 is pushed by the contact support 16 of the corresponding contactor 1, the swing portion 53 rotates and pushes the pushing portion 54 of the other locking member 51 through the pushing portion 54, so that the other locking member 51 rotates and drives the locking portion 5 to lock the other contactor 1 in a non-closable state.

[0071] Further, a pivot hole for passing through the pivot shaft 55 is provided on the pivot portion 52. Both ends of the pivot shaft 55 are respectively inserted into the mounting holes 460 of the two rotating members 46 and fixedly connected. The pivot hole sleeves the middle portion of the pivot shaft 55. A torsion spring 56 is provided on the side surface of the locking member 51. The locking member 51 is provided with a spring portion 57 that cooperates with the torsion spring 56. The spiral structure in the middle of the torsion spring 56 sleeves on the pivot shaft 55. Both ends of the torsion spring 56 respectively contact the rotating seat 4 and the spring portion 57. A limiting portion 58 is provided on the swinging portion 53. The rotating seat 4 is provided with a blocking portion 48 for blocking the limiting portion 58. When the locking portion 5 retracts into the mounting seat 3, the torsion spring 56 is used to drive the limiting portion 58 to contact the blocking portion 48. When the locking portion 5 is inserted into the contactor 1, the torsion spring 56 is used to drive the locking portion 5 to contact the contact support 16 in the contactor 1.

[0072] Further, the pivot portion 52 is arranged on one side of the swinging portion 53 along the installation direction of the interlocking device 2, that is, the pivot portion 52 is arranged on the bottom side of the swinging portion 53 along the height direction of the contactor 1, so that the swinging portion 53 is arranged above the pivot portion 52. By arranging the swinging portion 53 above the pivot portion 52, on the basis that the height of the contact support 16 of the contactor 1 remains unchanged, the space below the swinging portion 53 can be utilized to facilitate the installation of the rotating rotating seat 4 and the installation of the mounting seat 3 and the contactor 1, thereby reducing the height of the interlocking device 2. If the swinging portion 53 is arranged below the pivot portion 52, in order to match the height of the contact support 16, the pivot portion 52 needs to extend upward, increasing the height of the interlocking device 2, but it also belongs to the protection scope of the present invention. By limiting the locking member 51 with the torsion spring 56, not only can the swinging portion 53 be kept above the pivot portion 52, but also the locking portion 5 can be kept in contact with the contact support 16 to work reliably.

[0073] Preferably, the torsion spring 56 is used to drive the swinging portion 53 of the corresponding locking member 51 to rotate in a direction away from the swinging portion 53 of the other locking member 51. When the limiting portions 58 of the two locking members 51 respectively contact the corresponding blocking portions 48 driven by the torsion spring 56, the pushing portions 54 of the two locking members 51 are arranged at intervals, which can not only ensure that the locking portion 5 remains in contact with the contact support 16, but also make the two locking portions 5 not contact each other when the contactor 1 is not closed.

[0074] As the second embodiment of the locking structure is not shown in the figure, the locking structure includes a swinging member rotatably arranged on the rotating seat 4. Two locking portions 5 are provided on the swinging member. When one contactor 1 is closed, it pushes the corresponding locking portion 5, causing the swinging member to rotate and drive the other locking portion 5 to block the closing of the other contactor 1.

[0075] As the third embodiment of the locking structure is not shown in the figure, the locking structure includes a sliding member linearly moving on the rotating seat 4. Locking portions 5 are respectively provided at both ends of the sliding member along the moving direction. When one contactor 1 is closed, it pushes the corresponding locking portion 5, causing the swinging member to linearly move and drive the other locking portion 5 to block the closing of the other contactor 1.

[0076] As Figure 14 shown, the rotating seat 4 is provided with an operating portion 42 extending outside the mounting seat 3. An operating hole 44 for inserting an operating tool is provided on the operating portion 42. The operating hole 44 in this embodiment is in the shape of a "one" character, and it can also be in the shape of a "cross" character or other screwdriver shapes. The operating portion 42 is provided with two limiting protrusions 421 protruding radially. The mounting seat 3 is provided with two limiting bosses 422 respectively corresponding to the two limiting protrusions 421. The limiting bosses 422 are used to block the limiting protrusions 421, and the rotation position of the rotating seat 4 is restricted through the operating portion 42.

[0077] As Figure 5-7 shown, the radial cross-section of the boosting portion 43 is quadrilateral, and it includes four boosting surfaces 431 connected in sequence. The vertex positions of two adjacent boosting surfaces 431 form a boosting protrusion 45. A sliding surface in the shape of a curved surface is provided at the top of the boosting protrusion 45. The elastic member 33 includes two elastic rods 331 relatively arranged on both radial sides of the boosting portion 43, and two elastic rings 332 respectively connected to both ends of the elastic rods 331. The mounting seat 3 is provided with two fixed bosses 333 respectively corresponding to the two elastic rings 332. The two elastic rings 332 are respectively sleeved on the corresponding fixed bosses 333. When two boosting surfaces 431 are arranged parallel to the elastic rods 331, the elastic rods 331 are in the original uncharged state. The distance between the two elastic rods 331 is greater than or equal to the distance between two opposite boosting surfaces 431, and less than the distance between two sliding surfaces on the diagonal. The rotation of the rotating seat 4 drives the two boosting protrusions 45 on the diagonal to respectively push the two elastic rods 331 outward and store energy for the two elastic rods 331 respectively. When the highest point of the boosting protrusion 45 pushes the elastic rod 331 and passes over the elastic rod 331, the elastic force exerted by the elastic rod 331 on the boosting protrusion 45 is in the same direction as the rotation direction of the rotating seat 4. The elastic rod 331 releases energy to push the rotating seat 4 to continue rotating until the elastic rod 331 returns to the uncharged state parallel to the boosting surface 431. During the energy release process of the elastic rod 331, the rotating seat 4 can be quickly rotated to an accurate position, preventing problems such as damage and failure of the interlocking device 2 caused by incomplete manual rotation.

[0078] As other embodiments, one end of the elastic member 33 is rotatably connected, and the other end is connected to the boosting portion 43 of the rotating base 4. The rotation of the rotating base 4 drives the elastic member 33 to store energy first, and after the elastic member 33 passes through the dead point position of the equilibrium position, the energy is released to drive the rotating base 4 to continue rotating to an accurate position.

[0079] As Figure 15-17 shown, two parallel limiting ribs 121 are provided on the outer shell of the contactor 1. A guide rail 122 is provided between the two limiting ribs 121. Guide surfaces 123 are respectively provided on two opposite side surfaces of the guide rail 122. An installation groove 301 for sleeving on the guide rail 122 is provided on the side wall of the installation base 3 that is in close contact with the contactor 1. The installation groove 301 is used for guiding during the process of inserting the installation base 3 into the installation space 15, and can also play a role in limiting the installation base 3 after the installation base 3 is installed in place. Elastic buckles 302 are respectively provided on two opposite sides of the installation base 3, and the two elastic buckles 302 on both sides are respectively used for being stuck to the bottom of the two limiting ribs 121 for limiting.

[0080] Preferably, two elastic portions 303 are respectively connected to two opposite sides of the installation base 3. The elastic buckle 302 is arranged at the connection position of the two elastic portions 303. One end where the two elastic portions 303 are connected is spaced from the installation base 3, and the two ends where the two elastic portions 303 are away from each other are respectively connected to the installation base 3. The portion where the elastic portion 303 is spaced from the installation base 3 can facilitate pressing and deformation, so that the buckle above is separated from the limiting rib 121, which is convenient for installing and disassembling the installation base 3. The elastic portion 303, the elastic buckle 302 and the installation base 3 are integrally formed. After the installation base 3 is inserted into the installation space 15, the installation base 3 can be directly clamped with the contactor 1. Of course, it is also possible to only provide the elastic portions 303 on both sides of the top and not provide the elastic portions 303 on both sides of the bottom, which all belong to the protection scope of the present invention.

[0081] Further, the guiding groove 31 of the mounting base 3 for mounting the rotating base 4 includes a first guiding groove 311 and a second guiding groove 312. The mounting member 32 is provided with two first guiding portions 321 and two second guiding portions 322 corresponding to the two first guiding portions 321 respectively. The second guiding portions 322 are arranged on one side of the first guiding portions 321 at intervals along the rotation axis of the rotating base 4. Support plates 323 are respectively arranged between the two first guiding portions 321 and the corresponding second guiding portions 322. The distance between the two support plates 323 is greater than the distance between the two first guiding portions 321 and greater than the distance between the two second guiding portions 322. An avoidance groove 34 for accommodating the locking portion 5 is formed between the two support plates 323. The two first guiding portions 321 are respectively provided with first guiding surfaces 3210 in a curved surface shape on the side close to each other. The first guiding surfaces 3210 on the two first guiding portions 321 are used to form the first guiding groove 311. The two second guiding portions 322 are respectively provided with second guiding surfaces 3220 in a curved surface shape on the side close to each other. The second guiding surfaces 3220 on the two second guiding portions 322 are used to form the second guiding groove 312. The first guiding groove 311 and the second guiding groove 312 are oppositely arranged on both sides of the avoidance groove 34 and are respectively matched with the two ends of the rotating base 4. Of course, the two guiding portions can also be connected, that is, the two guiding surfaces 123 are connected, which all fall within the protection scope of the present invention.

[0082] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship usually placed during use, and is only for the convenience of description, rather than indicating that the device or element referred to must have a specific orientation. Therefore, it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating relative importance.

[0083] 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 still be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. An interlocking device, comprising a locking structure, wherein the locking structure comprises two locking parts (5) arranged opposite to each other and used for being inserted into contactors (1) on both sides to prevent the two contactors (1) from being closed at the same time, characterized in that: The interlocking device (2) further comprises a mounting seat (3) and a rotating seat (4) rotatably arranged on the mounting seat (3); the locking structure is movably arranged on the rotating seat (4); the rotating seat (4) is capable of rotating between at least two positions; when the rotating seat (4) rotates to one of the positions, the two locking parts (5) of the locking structure are driven to retract into the mounting seat (3); when the rotating seat (4) rotates to the other position, the two locking parts (5) of the locking structure are driven to rotate outside the mounting seat (3) for insertion into the contactors (1) on both sides.

2. The interlocking device according to claim 1, characterized in that: The locking structure comprises a swinging member rotatably arranged on a rotating seat (4), and two locking parts (5) are provided on the swinging member, wherein one contactor (1) pushes the corresponding locking part (5) when closing the switch, so that the swinging member rotates and drives the other locking part (5) to prevent the other contactor (1) from closing the switch.

3. The interlocking device according to claim 1, characterized in that: The locking structure comprises a sliding member arranged on a rotating seat (4) for linear movement, wherein locking portions (5) are respectively provided at both ends of the sliding member along the moving direction, and when one of the contactors (1) is closed, it pushes the corresponding locking portion (5), causing the swing member to move linearly and drive the other locking portion (5) to block the other contactor (1) from closing.

4. The interlocking device according to claim 1, characterized in that: The locking structure comprises two locking members (51), the two locking members (51) are rotatably mounted in a rotating seat (4), the two locking members (51) correspond to the two contactors (1) respectively, and the two locking members (51) are respectively provided with locking parts (5), and when one of the contactors (1) is closed, the locking part (5) of one of the locking members (51) is pushed, so that the locking member (51) rotates and pushes the other locking member (51) to rotate, so that the locking part (5) of the other locking member (51) blocks the closing of the other contactor (1).

5. The interlocking device according to claim 4, characterized in that: The invention also comprises a torsion spring (56) for pushing the locking member (51) to rotate, the locking member (51) being provided with a limiting portion (58), the rotating seat (4) being provided with a blocking portion (48) for blocking the limiting portion (58), the torsion spring (56) driving the limiting portion (58) to contact the blocking portion (48) when the locking member (5) is retracted into the mounting seat (3), and the torsion spring (56) driving the locking member (5) to contact the contact support (16) in the contactor (1) when the locking member (5) is inserted into the contactor (1).

6. The interlocking device according to claim 4, characterized in that: The locking member (51) comprises a pivoting portion (52) rotatably connected to the rotating seat (4), and a swinging portion (53) connected to the pivoting portion (52); the sides of the swinging portions (53) of the two locking members (51) that are away from each other are respectively provided with locking portions (5); the sides of the locking portions (5) of the two locking members (51) that are close to each other are respectively provided with pushing portions (54); when the locking portion (5) is pushed by the contact support (16) of the corresponding contactor (1), the swinging portion (53) rotates and pushes the pushing portion (54) of the other locking member (51) through the pushing portion (54), so that the other locking member (51) rotates and drives the locking portion (5) to lock the other contactor (1) in a state where it cannot be closed.

7. The interlocking device according to claim 6, characterized in that: The pivoting portion (52) is arranged on the bottom side of the swinging portion (53) along the height direction of the contactor (1).

8. The interlocking device according to claim 6, characterized in that: The pivoting portion (52) is provided with a pivot hole for passing a pivot shaft (55), the two ends of the pivot shaft (55) are respectively fixedly connected to the rotating seat (4), the pivot hole is sleeved in the middle of the pivot shaft (55), the side of the locking member (51) is provided with a torsion spring (56), the locking member (51) is provided with a spring portion (57) matched with the torsion spring (56), the middle portion of the torsion spring (56) is sleeved on the pivot shaft (55), and the two ends of the torsion spring (56) are respectively in contact with the rotating seat (4) and the spring portion (57).

9. The interlocking device according to claim 8, characterized in that: The torsion spring (56) is used to drive the swinging portion (53) of the corresponding locking member (51) to rotate in a direction away from the swinging portion (53) of the other locking member (51); when the limiting portions (58) of the two locking members (51) are respectively in contact with the corresponding blocking portions (48) driven by the torsion spring (56), the pushing portions (54) of the two locking members (51) are arranged at intervals.

10. The interlocking device according to claim 1, characterized in that: The rotating seat (4) is capable of rotating between at least two positions, wherein the two positions are respectively a first position and a second position; when the rotating seat (4) rotates to the first position, the two locking portions (5) rotate into the mounting seat (3); when the rotating seat (4) rotates to the second position, the two locking portions (5) rotate out of the mounting seat (3); and when the rotating seat (4) is located at the first position, the line connecting the two locking portions (5) of the locking structure is perpendicular to the line connecting the two locking portions (5) of the locking structure when the rotating seat (4) is located at the second position.

11. The interlocking device according to claim 1, characterized in that: The rotating seat (4) is a columnar structure, the axis of the columnar structure is also the rotation axis of the rotating seat (4), the rotating seat (4) is installed in the installation seat (3) and can rotate around the axis of the rotating seat (4), the rotating seat (4) is provided with a locking structure installation groove for accommodating the locking structure, the locking structure installation groove passes through the radial direction of the rotating seat (4), the locking structure is installed in the locking structure installation groove, and the two locking parts (5) extend from the locking structure installation groove along the radial direction of the rotating seat (4).

12. The interlocking device according to claim 11, characterized in that: The rotating seat (4) comprises a rotating portion (41) of a columnar structure, the rotating portion (41) being provided with the locking structure mounting groove, the mounting seat (3) being provided with a guide groove (31) and two avoidance grooves (34) connected to the guide groove (31), the length direction of the guide groove (31) being arranged parallel to the direction in which the mounting seat (3) is inserted between the two contactors (1), the rotating portion (41) of the rotating seat (4) being rotatably arranged in the guide groove (31), and the two avoidance grooves (34) being used to accommodate the two locking portions (5) respectively.

13. The interlocking device according to claim 1, characterized in that: The rotating seat (4) is provided with a power-assisting portion (43), and the power-assisting portion (43) is provided with a power-assisting protrusion (45). The mounting seat (3) is provided with an elastic member (33) for pushing the power-assisting portion (43). When the rotating seat (4) rotates, the power-assisting protrusion (45) pushes and compresses the elastic member (33). After the elastic force applied by the elastic member (33) to the power-assisting protrusion (45) exceeds the rotation center of the power-assisting portion (43), the elastic member (33) pushes the rotating seat (4) to continue rotating.

14. The interlocking device according to claim 13, characterized in that: The boosting portion (43) comprises four boosting surfaces (431) connected in sequence, the top angle positions of two connected boosting surfaces (431) form a boosting protrusion (45), and a sliding surface with a curved surface shape is provided on the top of the boosting protrusion (45). The elastic member (33) comprises two elastic rods (331) arranged on two radial sides of the boosting portion (43) and two elastic rings (332) respectively connected to the two ends of the elastic rods (331). The mounting seat (3) is provided with two fixing bosses (333) respectively corresponding to the two elastic rings (332), and the two elastic rings (332) are respectively sleeved on the two fixing bosses (333). On the corresponding fixed boss (333), the distance between the two elastic rods (331) is greater than or equal to the distance between the two opposite power-assisting surfaces (431), and less than the distance between the two sliding surfaces located on the diagonal line. The rotating seat (4) rotates to drive the two power-assisting protrusions (45) located on the diagonal line to push the two elastic rods (331) outwards respectively, and store energy for the two elastic rods (331). After the highest point of the power-assisting protrusion (45) pushes the elastic rod (331) and passes over the elastic rod (331), the elastic rod (331) releases energy to push the rotating seat (4) to continue rotating.

15. The interlocking device according to claim 12, characterized in that: The guide groove (31) comprises a first guide groove (311) and a second guide groove (312), an avoidance groove (34) is provided between the first guide groove (311) and the second guide groove (312), and the first guide groove (311) and the second guide groove (312) respectively cooperate with two ends of the rotating seat (4).

16. The interlocking device according to claim 15, characterized in that: The mounting seat (3) comprises two mounting members (32) arranged opposite to each other, the two mounting members (32) are respectively provided with the guide groove (31), the mounting member (32) is provided with two first guide parts (321), and two second guide parts (322) respectively corresponding to the two first guide parts (321), the second guide parts (322) are arranged at intervals on one side of the first guide part (321) along the rotation axis of the rotating seat (4), the two first guide parts (321) are respectively provided with a first guide surface (3210) in a curved shape on a side close to each other, the first guide surfaces (3210) on the two first guide parts (321) are used to form a first guide groove (311), the two second guide parts (322) are respectively provided with a second guide surface (3220) in a curved shape on a side close to each other, and the second guide surfaces (3220) on the two second guide parts (322) are used to form a second guide groove (312).

17. The interlocking device according to claim 16, characterized in that: A support plate (323) is provided between the two first guide portions (321) and the corresponding second guide portions (322), respectively; the distance between the two support plates (323) is greater than the distance between the two first guide portions (321), and greater than the distance between the two second guide portions (322); and the avoidance groove (34) is formed between the two support plates (323).

18. The interlocking device according to claim 1, characterized in that: The rotating seat (4) comprises a rotating portion (41) of a columnar structure, and an operating portion (42) arranged at one end of the rotating portion (41), an operating hole (44) is provided on the operating portion (42), and a first mounting seat hole corresponding to the operating portion (42) is provided on the mounting seat (3).

19. The interlocking device according to claim 18, characterized in that: The operating portion (42) extends to the outside of the mounting seat (3); the operating portion (42) is provided with two limiting protrusions (421) protruding in the radial direction; the mounting seat (3) is provided with two limiting bosses (422) respectively corresponding to the two limiting protrusions (421); the limiting bosses (422) are used to block the limiting protrusions (421), thereby limiting the rotation position of the rotating seat (4) through the operating portion (42).

20. The interlocking device according to claim 1, characterized in that: The rotating seat (4) comprises two rotating members (46) arranged opposite to each other, and the two rotating members (46) are spliced ​​together to form the rotating seat (4).

21. The interlocking device according to claim 1, characterized in that: The radially two side protrusions of the rotating seat (4) are provided with locking plates (47), and the rotating seat (4) drives the locking portion (5) to rotate, so that when the locking portion (5) is inserted into the contactor (1), it can simultaneously drive the locking plate (47) and the contactor (1) to limit position.

22. The interlocking device according to claim 1, characterized in that: The mounting seat (3) is provided with a mounting groove (301) for guiding and limiting on a side wall that is in close contact with the contactor (1).

23. The interlocking device according to claim 1, characterized in that: Two elastic parts (303) are respectively connected on opposite sides of the mounting seat (3); an elastic buckle (302) is arranged at the connecting position of the two elastic parts (303); one end of the two elastic parts (303) connected is spaced from the mounting seat (3); one end of the two elastic parts (303) away from each other is respectively connected to the mounting seat (3); the elastic part (303), the elastic buckle (302) and the mounting seat (3) are integrally formed.

24. An interlocking structure of a contactor, characterized in that: The invention comprises two contactors (1) and an interlocking device as claimed in any one of claims 1 to 23, wherein an installation space (15) is provided between the two contactors (1), and a rotating seat (4) drives two locking parts (5) of a locking structure to retract into a mounting seat (3), so that the mounting seat (3) is inserted into the installation space (15).

25. The interlocking structure of the contactor according to claim 24, characterized in that: The housings of the two contactors each comprise a lower housing (11) and an upper housing (12); when the lower housings (11) of the two contactors (1) are in contact, the installation space (15) is provided between the upper housings (12) of the two contactors (1).

26. The interlocking structure of the contactor according to claim 24, characterized in that: The two contactors are respectively provided with an electromagnetic system and a contact system, the contact system comprising a moving contact and a stationary contact, the moving contact being arranged on a contact support (16) driven by the electromagnetic system, the electromagnetic system comprising a coil and an iron core controlled by the coil, the coil being used to drive the iron core to drive the moving contact to move, the housings of the two contactors are provided with an interlocking hole (13) for passing a locking part (5), the two locking parts (5) of the locking structure are respectively matched with the contact supports (16) of the two contactors (1), a locking hole for inserting the locking part (5) is provided on the contact support (16), when one of the contactors (1) is closed, the contact support (16) pushes the corresponding locking part (5) away from the locking hole of the contact support (16), and the other locking part (5) is inserted into the locking hole of the contact support (16) of the other contactor (1), thereby blocking the contact support (16) from moving and locking the contactor (1) in a state where it cannot be closed.

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