Switching device

Abstract

A switching device, comprising a shell, and a contact system and two electromagnetic systems which are respectively arranged in the shell, wherein the two electromagnetic systems are oppositely arranged on two sides of the contact system, and each electromagnetic system comprises an upper armature and a coil used for driving the upper armature to move; the upper armatures of the two electromagnetic systems are connected by means of a linkage shaft; the contact system comprises static contacts and moving contacts that are arranged on contact supports; the linkage shaft is connected to the contact supports, and the two electromagnetic systems respectively drive the contact supports to move by means of the linkage shaft, so that the contact supports drive the moving contacts to be in contact with or separated from the static contacts, the driving force is large, the action response is fast, the balance is good, and the height of the switching device can be reduced.

Description

Switches

[0001] This application claims priority to Chinese patent application number CN202311416225.0 and application date October 30, 2023. The entire contents of the above Chinese patent application are incorporated by reference into this application. Technical Field

[0002] The invention relates to the field of low-voltage electrical appliances, and in particular to a switching electrical appliance. Background Art

[0003] Existing contactors are commonly used for control circuits, but their electromagnetic systems and main circuits are arranged vertically, resulting in a relatively high height. This height makes it impossible to install contactors in some locations. Furthermore, contactors lack overload and short-circuit protection. With the emergence of new industries and business models, new demands are being placed on low-voltage switchgear. These require both the long lifespan and high operating frequency of contactors, as well as certain protective features that existing traditional contactors cannot provide.

[0004] Summary of the Invention

[0005] The purpose of the present invention is to break through some limitations of the prior art and provide a switch electrical appliance.

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

[0007] A switching electrical appliance includes a housing and a contact system and two sets of electromagnetic systems respectively arranged in the housing, the two sets of electromagnetic systems being arranged on either side of the contact system relative to each other, the two sets of electromagnetic systems respectively including an upper armature and a coil for driving the upper armature to move, the upper armatures of the two sets of electromagnetic systems being connected via a linkage shaft, the contact system including a static contact and a moving contact arranged on a contact support, the linkage shaft being connected to the contact support, the two sets of electromagnetic systems respectively driving the contact support to move via the linkage shaft, so that the contact support drives the moving contact to contact and separate with the static contact.

[0008] Optionally, the two sets of electromagnetic systems are relatively arranged on both sides of the contact support along the first direction, the coil is used to drive the upper armature to move along the second direction, and drive the contact support to move along the second direction, the input end and the output end of the contact system are arranged along the third direction, and the first direction, the second direction and the third direction are arranged perpendicular to each other.

[0009] Optionally, two static contacts serving as the incoming and outgoing ends are provided on both sides of the contact support, and the two static contacts are arranged along the third direction. The contact support is used to drive the moving contact to contact and separate with the static contacts 3 at both ends at the same time.

[0010] Optionally, a circuit board connected to two sets of electromagnetic systems is provided in the shell, and the circuit board is provided with a control unit and a current acquisition circuit. The control unit is connected to the electromagnetic system to drive the electromagnetic system to operate, and the control unit is connected to the current acquisition circuit to collect the current of the main circuit. When an overload or short circuit fault occurs, the electromagnetic system is driven to operate, so that the electromagnetic system drives the moving contact and the static contact to separate.

[0011] Optionally, the circuit board is provided with a voltage acquisition circuit, and the control unit is connected to the voltage acquisition circuit to collect the voltage of the main circuit, and drives the electromagnetic system to operate when an overvoltage or undervoltage fault occurs, so that the electromagnetic system drives the moving contact and the static contact to separate.

[0012] Optionally, the circuit board includes a quick release circuit, which is connected to the coil of the electromagnetic system and is used to eliminate residual current in the coil.

[0013] Optionally, the shell includes a base and an arc-extinguishing cover arranged on the top side of the base, an upper cover is provided above the arc-extinguishing cover, the contact system is arranged inside the arc-extinguishing cover and the base, an arc-extinguishing mechanism is provided in the arc-extinguishing cover, two protruding boss structures are provided on the top side of the base, and groove structures for accommodating the electromagnetic system are respectively provided in the middle of the two boss structures.

[0014] Optionally, the groove structure is provided with a notch near the side wall of the shell, and the shell is provided with a side cover corresponding to the notch.

[0015] Optionally, the top side of the base is further provided with two side covers respectively used to cover the two boss structures, the two boss structures are arranged on both sides of the arc extinguishing cover opposite to each other, and the height of the boss structure is smaller than the height of the arc extinguishing cover.

[0016] Optionally, a bottom cover is provided on the bottom side of the base, and a reaction spring connected to the contact support is provided between the base and the bottom cover.

[0017] Optionally, two circuit boards are provided in the shell, and the two circuit boards are respectively connected to the coils of the two sets of electromagnetic systems.

[0018] Optionally, a bottom cover is provided on the bottom side of the base, and two circuit boards are respectively located below the corresponding electromagnetic systems and are arranged between the base and the bottom cover.

[0019] Optionally, two sets of wiring mechanisms are provided on the boss structure of the housing corresponding to each electromagnetic system, and each set of wiring structures includes two sets of contact terminals connected to the circuit board, and the contact terminals are used to connect to the control circuit of the corresponding electromagnetic system.

[0020] Optionally, contact terminals are provided on both side walls of the shell in the first direction for connecting to a control circuit of a corresponding electromagnetic system.

[0021] Optionally, the contact system is provided with multiple supporting structures, each of which is provided with a moving contact, and the multiple supporting structures are arranged in sequence along the length direction of the linkage shaft. The arc extinguishing cover is provided with a partition between two adjacent supporting structures, and the partition is provided with a linkage groove on the side close to the base for avoiding the linkage shaft, and the linkage shaft passes through the multiple supporting structures in sequence.

[0022] Optionally, arc extinguishing structures are respectively provided at two ends of the moving contact in the third direction, and the arc extinguishing structures include a plurality of arc extinguishing fins arranged at intervals.

[0023] Optionally, an arc-striking plate and an arc-isolating plate are respectively provided at both ends of the moving contact in the third direction, and the corresponding arc extinguishing structure is located between the arc-striking plate and the arc-isolating plate. The arc-striking plate is located on the side of the arc-extinguishing structure close to the moving contact, and the arc-isolating plate is located on the side of the arc-extinguishing structure away from the moving contact. The arc-striking plate is used to lead the arc to the arc extinguishing structure, and the arc-isolating plate is used to separate the arc and play an arc extinguishing role.

[0024] Optionally, a contact spring and a clamping structure connected to the contact spring are provided inside the contact support, and the clamping structure extends to the outside of the contact support to push the moving contact, and the contact spring drives the moving contact to be pressed against the upper limit position of the outer side surface of the contact support through the clamping structure. When the contact support drives the moving contact to contact the static contact, the moving contact is pressed against the upper limit position of the static contact, and the contact support moves and compresses the contact spring, and the contact spring drives the moving contact to be pressed against the upper limit position of the static contact through the clamping structure.

[0025] 14. The repairing kit for automotive dents, according to claim 13, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The top end face of said sliding panel also is provided with an interlock plate, and the interlock plate is connected with the interlock plate of said sliding panel and the interlock plate respectively.

[0026] Optionally, the electromagnetic system includes an upper armature and a fixed lower armature, and a coil is arranged between the upper armature and the lower armature, and the coil is used to generate electromagnetic force to drive the upper armature to move toward the lower armature.

[0027] Optionally, the electromagnetic system includes a U-shaped lower armature and a coil frame arranged on the inner side of the lower armature, the coil is arranged on the outer side of the coil frame, and the upper armature is T-shaped. The upper armature includes a first linkage part and a second linkage part connected to the middle part of the first linkage part. A linkage hole is provided at the connection between the first linkage part and the second linkage part. The two ends of the linkage shaft are respectively inserted into the linkage holes of the upper armatures of the two electromagnetic systems, so that the two upper armatures can drive the linkage shaft to move. The second linkage part is inserted into the inner side of the coil frame, and the lower armature is used to attract the second linkage part so that the second linkage part drives the upper armature to move. The two ends of the first linkage part are respectively connected to the reset spring, and the reset spring is used to drive the upper armature to reset.

[0028] The switching electrical appliance created by the present invention arranges two sets of electromagnetic systems on both sides of the contact system relatively, and the two sets of electromagnetic systems synchronously drive the contact supports to move back and forth up and down, so that the contact supports drive the moving contacts to contact and separate with the static contacts. Not only is the driving force large and the action response fast, which can drive one or more sets of moving contacts, but the two sets of electromagnetic systems also apply driving force from both sides to ensure balance. In particular, the electromagnetic system is located on the horizontal side of the contact system, and the electromagnetic system and the contact system occupy space at the same height, avoiding the electromagnetic system and the contact system being arranged in the longitudinal direction, which can reduce the height of the switching electrical appliance. The switching electrical appliance of this embodiment can be used in locations where contactors cannot be installed at the original height.

[0029] In addition, the switching electrical appliance created by the present invention has the long electrical life, mechanical life and convenience of remote control of the contactor, while also adding the short-circuit disconnection protection function of the circuit breaker and the thermal overload protection function of the thermal overload relay, providing users with a new choice. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a schematic structural diagram of a switch device according to the present invention;

[0031] FIG2 is an exploded view of the switch device according to the present invention;

[0032] FIG3 is a schematic diagram of the coordination between the electromagnetic system and the contact support created by the present invention;

[0033] FIG4 is a schematic structural diagram of an arc extinguishing hood created by the present invention;

[0034] FIG5 is a cross-sectional view of a switching device according to the present invention;

[0035] FIG6 is another cross-sectional view and an enlarged view of the switch electrical apparatus created by the present invention;

[0036] FIG7 is a schematic structural diagram of the linkage shaft, the pressing structure and the moving contact created by the present invention;

[0037] In the figure, 1. contact system; 2. electromagnetic system; 21. upper armature; 22. coil; 20. linkage shaft; 3. static contact; 4. contact support; 5. moving contact; 61. base; 62. arc extinguishing cover; 63. upper cover; 64. boss structure; 65. side cover; 66. groove structure; 67. side cover; 68. bottom cover; 7. reaction spring; 23. circuit board; 24. sensor; 27. contact terminal; 621. partition; 622. linkage groove; 81. arc starting piece; 8 2. Arc-isolating plate; 83. Arc-extinguishing structure; 40. Contact spring; 41. First side plate; 42. Second side plate; 43. Top plate; 44. Cover plate; 46. Support plate; 9. Clamping structure; 91. Spring bracket side; 92. Spring bracket bottom; 47. Slide groove; 93. Press rod; 94. Avoidance hole; 95. Limiting boss; 25. Lower armature; 26. Coil skeleton; 211. First linkage part; 212. Second linkage part; 213. Linkage hole; 214. Positioning piece. DETAILED DESCRIPTION

[0038] The following embodiments are given in conjunction with the accompanying drawings to further illustrate the specific implementation of the switch electrical apparatus created by the present invention. The switch electrical apparatus created by the present invention is not limited to the description of the following embodiments.

[0039] As shown in Figures 1-6, the switching electrical appliance of this embodiment includes a housing and a contact system 1 and two groups of electromagnetic systems 2 respectively arranged in the housing. The two groups of electromagnetic systems 2 are relatively arranged on both sides of the contact system 1. The two groups of electromagnetic systems 2 respectively include an upper armature 21 and a coil 22 for driving the upper armature 21 to move. The upper armatures 21 of the two groups of electromagnetic systems 2 are connected by a linkage shaft 20. The contact system 1 includes a static contact 3 and a moving contact 5 arranged on a contact support 4. The linkage shaft 20 is connected to the contact support 4. The two groups of electromagnetic systems 2 drive the contact support 4 to move through the linkage shaft 20, so that the contact support 4 drives the moving contact 5 to contact and separate with the static contact 3.

[0040] The switching electrical appliance of this embodiment is configured by arranging two sets of electromagnetic systems 2 on both sides of the contact system 1 relative to each other. The two sets of electromagnetic systems 2 synchronously drive the contact support 4 to move up and down, so that the contact support 4 drives the movable contact 5 to contact and separate with the static contact 3. Not only is the driving force large enough to drive one or more sets of movable contacts 5, but the two sets of electromagnetic systems 2 apply driving force from both sides to ensure balance. In particular, the electromagnetic system 2 is located on the lateral side of the contact system 1, and the electromagnetic system 2 and the contact system 1 occupy space at the same height, avoiding the electromagnetic system 2 and the contact system 1 being arranged longitudinally, thereby reducing the height of the switching electrical appliance. The switching electrical appliance of this embodiment can be used in locations where contactors cannot be installed at the original height.

[0041] As shown in Figures 1-6, the two electromagnetic systems 2 are arranged relative to each other on either side of the contact support 4 along a first direction. The coil 22 is used to drive the upper armature 21 to move in a second direction, thereby driving the contact support 4 to move in the second direction. The inlet and outlet terminals of the contact system 1 are arranged along a third direction. The first, second, and third directions are mutually orthogonal and perpendicular. The internal structure of the housing is rationally arranged, with a compact structure and a small size. Referring to Figure 1, the first direction is the width of the switch, the second direction is the height of the switch, and the third direction can be the length of the switch, for connecting wires at both ends of the length of the switch.

[0042] Furthermore, two static contacts 3 are provided on both sides of the contact support 4, serving as the incoming and outgoing terminals, respectively. The two static contacts 3 are arranged along a third direction, and both ends of the moving contact 5 extend out of the contact support 4 in the third direction. The contact support 4 is used to drive the moving contact 5 to simultaneously contact and separate with the static contacts 3 at both ends, which can further improve the rationality of the layout. In this embodiment, the two static contacts 3 are respectively integrated with the incoming and outgoing terminals, that is, as shown in Figures 1 and 5, one end of the static contact 3 is provided with a static contact point that cooperates with the moving contact, and the other end extends out of the housing as the incoming or outgoing terminal for connecting to the power supply. Of course, as other embodiments, the two static contacts 3 can also be provided separately from the incoming and outgoing terminals, that is, the static contacts 3 are respectively provided with terminal blocks serving as the incoming and outgoing terminals, and the static contacts 3 are connected to the terminal blocks by welding, riveting, or screws, or can be indirectly connected by conductors.

[0043] As shown in Figures 1-2, the housing includes a base 61 and an arc extinguishing cover 62 arranged on the top side of the base 61. A top cover 63 is provided above the arc extinguishing cover 62. The contact system 1 is arranged inside the arc extinguishing cover 62 and the base 61. The arc extinguishing cover 62 is provided with an arc extinguishing mechanism. Two raised boss structures 64 are provided on the top side of the base 61. The middle parts of the two boss structures 64 are respectively provided with groove structures 66 for accommodating the electromagnetic system 2. The electromagnetic system 2 is installed in the groove structure 66. Preferably, the groove structure 66 is provided with a notch near the side wall of the housing, and the housing is provided with a side cover 67 corresponding to the notch, which is used to protect the electromagnetic system 2 and also facilitate the replacement of the electromagnetic system 2. In this embodiment, the side cover 67 is L-shaped, corresponding to the top and side notches of the groove structure 66. Of course, other structures can also be used. Furthermore, the top side of the base 61 is provided with two side covers 65 for respectively covering the two boss structures 64. The two boss structures 64 are arranged on opposite sides of the arc extinguishing cover 62, and the height of the boss structures 64 is less than the height of the arc extinguishing cover 62, so that the internal space is more rationally utilized. Of course, the height of the boss structures 64 can also be greater than or equal to the height of the arc extinguishing cover 62. The bottom side of the base 61 is provided with a bottom cover 68, and a reaction spring 7 connected to the contact support 4 is provided between the base 61 and the bottom cover 68. In this embodiment, the reaction spring 7 is used to drive the contact support 4 to drive the moving contact 5 away from the static contact 3 to form a normally open contact. When the coil 22 is energized, it presses down the contact support 4 to close the moving contact 5 and the static contact 3. When the coil 22 is de-energized, the reaction spring 7 and the contact spring 40 push the contact support 4 to separate the moving contact 5 and the static contact 3. The shell structure of this embodiment facilitates the installation of the electromagnetic system 2 and the contact system 1. Obviously, as other embodiments, the shell can only be provided with a base and an upper cover, or a left shell and a right shell, or be assembled from more shell structures, all of which fall within the scope of protection of the present invention.

[0044] As shown in FIG6 , the housing is provided with a circuit board 23 connected to the two sets of electromagnetic systems 2 respectively. The circuit board 23 can activate the two sets of electromagnetic systems 2. If there is a short circuit, overload, etc., the coil voltage is promptly disconnected, so that the contact support 4 drives the movable contact 5 to contact and separate from the static contact 3, thereby achieving the closing and disconnection of the switch. Preferably, the circuit board 23 is provided with a control unit, which can achieve overload, and / or short circuit, and / or undervoltage, and / or overvoltage protection, etc. For example, the circuit board 23 is provided with a control unit and a current acquisition circuit. The control unit is connected to the electromagnetic system 2 for driving the electromagnetic system 2 to operate, and the control unit is connected to the current acquisition circuit for collecting the current of the main circuit to detect overload or short circuit faults. When an overload or short circuit fault occurs, the electromagnetic system 2 is driven to operate, so that the electromagnetic system 2 drives the movable contact 5 to separate from the static contact 3. Furthermore, the circuit board 23 is also provided with a voltage acquisition circuit. The control unit is connected to the voltage acquisition circuit to collect the voltage of the main circuit to detect overvoltage or undervoltage faults. When an overvoltage or undervoltage fault occurs, the electromagnetic system 2 is driven to operate, so that the electromagnetic system 2 drives the moving contact 5 to separate from the static contact 3.

[0045] In this embodiment, the static contact 3 is provided with a sensor 24 connected to the circuit board 23. The circuit board 23 is provided with a control unit and a current acquisition circuit and a voltage acquisition circuit. The current acquisition circuit and the voltage acquisition circuit respectively detect the current and voltage of the static contact 3 through the sensor 24. When the control unit detects the occurrence of overload and short-circuit fault current through the current acquisition circuit, it drives the electromagnetic system 2 to operate, so that the electromagnetic system 2 drives the moving contact 5 to separate from the static contact 3. When the control unit detects the occurrence of overvoltage fault current through the voltage acquisition circuit, it drives the electromagnetic system 2 to operate, so that the electromagnetic system 2 drives the moving contact 5 to separate from the static contact 3. For example, when the current or voltage on the static contact 3 exceeds the threshold, the current acquisition circuit and the voltage acquisition circuit respectively output corresponding fault signals to the circuit board 23, and the duration of the fault signal is recorded through the circuit board 23. When the duration of the fault signal meets the threshold, the electromagnetic system 2 is driven to operate, so that the electromagnetic system 2 drives the moving contact 5 to separate from the static contact 3. The fault current can be an overload, short circuit, undervoltage, or overvoltage, or any combination thereof, enabling the switch to provide overload, short circuit, undervoltage, and / or overvoltage protection in addition to the control circuit. Of course, the circuit board 23 can also be located elsewhere, such as on the side of the electromagnetic system 2, and the sensor 24 can also be located on the terminal block, movable contact, or other conductive element of the main circuit, all of which fall within the scope of protection of the present invention. The sensor 24 can be a resistor, a mutual inductor, or the like.

[0046] Contact terminals 27 are provided on both sidewalls of the housing in the first direction, i.e., the width direction, for connecting to the control circuits of the corresponding electromagnetic systems 2. In this embodiment, the housing is provided with two circuit boards 23, each connected to the two sets of electromagnetic systems 2. The two circuit boards 23 are located below the corresponding electromagnetic systems 2 and disposed between the base 61 and the bottom cover 68. Furthermore, two sets of wiring mechanisms are provided on the boss structure 64 of the housing, corresponding to each set of electromagnetic systems 2. The two sets of wiring mechanisms are disposed on opposite sides of the corresponding electromagnetic system 2, and each set of wiring mechanisms includes two sets of contact terminals 27 connected to the circuit boards 23. The contact terminals 27 are used to connect to the control circuits of the corresponding electromagnetic systems 2, thereby achieving external control of the electromagnetic systems 2.

[0047] Furthermore, the circuit board 23 has the function of eliminating the residual current in the coil 22 of the electromagnetic system 2. The circuit board 23 includes a quick release circuit. The coil is an inductive element, which is an energy storage element. After power is cut off, there is still an induced current inside the coil. The armature 21 will generate residual magnetism, which hinders the release of the armature 21. The quick release circuit is connected to the coil 22 of the electromagnetic system 2 and is used to eliminate the residual current in the coil 22. In this embodiment, the two circuit boards 23 are respectively provided with a quick release circuit for connecting to the coils 22 of the two electromagnetic systems 2. The quick release circuit is used to eliminate the residual current in the coil 22 after the coil 22 is powered off. The quick release circuit includes a resistor and a diode, and the quick release circuit of the existing technology can also be used. In this embodiment, two circuit boards 23 are provided. The two circuit boards 23 can not only realize the separate control of the two electromagnetic systems 2, but also the two electromagnetic systems 2 can be protected by corresponding circuit boards 23. Of course, as other embodiments, one or more circuit boards 23 can also be set up, and one circuit board 23 is connected to two electromagnetic systems 2 at the same time, or multiple circuit boards 23 are connected, and the middle sensor 24 transmits the electrical signal to all circuit boards 23, and the circuit boards 23 then control their respective electromagnetic systems 2 respectively, so as to realize the control of the electromagnetic systems 2 on both sides.

[0048] As shown in Figure 3-4, this embodiment has a three-phase structure. The contact support 4 is provided with three supporting structures. The two electromagnetic systems 2 are respectively arranged on both sides of the three supporting structures. The three supporting structures are arranged in sequence along the length direction of the linkage shaft 20. The length direction of the linkage shaft 20 is the first direction. The arc extinguishing cover 62 is provided with a partition 621 between two adjacent supporting structures. The partition 621 is provided with a linkage groove 622 on the side close to the base 61 for avoiding the linkage shaft 20. The linkage shaft 20 passes through the three supporting structures in sequence and is used to drive the three supporting structures to move at the same time. The three supporting structures are respectively provided with moving contacts 5. Each supporting structure is respectively provided with two static contacts 3 on the other two sides. When the supporting structure moves, it drives the moving contact 5 to contact and separate with the corresponding two static contacts 3. In the switch apparatus of this embodiment, the first electromagnetic system 2, three support structures, and the second electromagnetic system 2 are sequentially arranged along the length of the linkage shaft 20. The movable contact 5 is mounted on the support structure, with both ends extending from the support structure. The length of the movable contact 5 is perpendicular to the length of the linkage shaft 20. Static contacts 3 corresponding to the ends of the movable contact 5 are provided on both sides of each support structure, and the line connecting the two static contacts 3 is perpendicular to the length of the linkage shaft 20. It is understood that the number of the support structures can also be adjusted, and the number of movable contacts 5 and static contacts 3 can also be adjusted accordingly based on the number of support structures. For example, one, two, or more than three support structures can be provided. The multiple support structures can be integrally injection-molded to form the contact support 4, or multiple support structures can be spliced ​​to form the contact support 4, or multiple support structures can be connected to the linkage shaft 20 separately. The multiple support structures are arranged along the length of the linkage shaft 20. The two electromagnetic systems 2 can simultaneously drive the movement of multiple support structures through the linkage shaft 20 without increasing the height of the switch apparatus.

[0049] As shown in FIG5 , arc extinguishing mechanisms are provided at both ends of the moving contact 5 , each including an arc extinguishing structure 83 . In this embodiment, the arc extinguishing cover 62 is provided with an arc-striking plate 81 and an arc-isolating plate 82 at both ends of the moving contact 5 in the third direction, and an arc-extinguishing structure 83 located between the arc-striking plate 81 and the arc-isolating plate 82 . The arc-extinguishing structure 83 includes a plurality of arc-striking plates arranged at intervals. The arc-striking plate 81 is located on the side of the arc-extinguishing structure 83 close to the moving contact 5 , and the arc-isolating plate 82 is located on the side of the arc-extinguishing structure 83 away from the moving contact 5 . The arc-striking plate 81 is used to guide the arc toward the arc-extinguishing structure 83 . The plurality of arc-striking plates separate the arc, thereby extinguishing the arc. The arc-isolating plate 82 is used to separate the arc, thereby extinguishing the arc. The upper cover 63 is used to protect the arc-striking plates 81, arc-isolating plates 82, and arc-extinguishing structure 83 in the arc-extinguishing cover 62 . In this embodiment, the two arc-striking plates 81 at both ends of each moving contact 5 are connected. Of course, the two arc-starting pieces 81 at both ends of each moving contact 5 can also be provided independently, and both fall within the protection scope of the present invention.

[0050] As shown in Figures 6-7, the movable contact 5 is mounted on the contact support 4 via a contact spring 40. In one embodiment, the movable contact 5 passes through the contact support 4, and the contact spring 40 is provided on the contact support 4 to act on the movable contact 5. Preferably, in this embodiment, the moving contact 5 is arranged on the top of the contact support 4 and is fixed by a clamping structure 9, a contact spring 40 and a contact support 4. The contact support 4 is provided with a contact spring 40 and a clamping structure 9 connected to the contact spring 40. The clamping structure 9 extends to the outside of the contact support 4 to push the moving contact 5. The contact spring 40 drives the moving contact 5 to be pressed against the upper limit position of the outer side surface of the contact support 4 through the clamping structure 9. When the contact support 4 drives the moving contact 5 to contact the static contact 3, the moving contact 5 is pressed against the upper limit position of the static contact 3. The contact support 4 moves and compresses the contact spring 40. The contact spring 40 drives the moving contact 5 to be pressed against the upper limit position of the static contact 3 through the clamping structure 9, thereby increasing the contact pressure between the static contact 3 and the moving contact 5. The clamping structure 9 is provided with an avoidance hole for avoiding the linkage shaft 20. Of course, as other embodiments, the clamping structure 9 may not be provided. For example, a sleeve (not shown in the figure) is provided on the linkage shaft 20. The linkage shaft 20 drives the sleeve to press on the top of the moving contact 5, so that the moving contact 5 is pressed on the contact support 4, which falls within the protection scope of the invention.

[0051] Specifically, the support structure of the contact support 4 is a hollow tetrahedron structure, including two first side plates 41 arranged opposite to each other, and two second side plates 42 connected between the two first side plates 41, the first side plates 41 are used to separate each phase, the two first side plates 41 and the two second side plates 42 are connected by a top plate 43, and a support space for accommodating the clamping structure 9 and the contact spring 40 is formed between the two first side plates 41, the two second side plates 42 and the top plate 43, and also includes a cover plate 44 arranged opposite to the top plate 43, the cover plate 44 The two first side plates 41 and the top plate 43 are respectively provided with a first supporting hole and a second supporting hole for passing the linkage shaft 20. The linkage shaft 20 passes through the first side plate 41 and the top plate 43 from the first supporting hole and the second supporting hole respectively and is used to drive the contact support 4 to move. The two second side plates 42 are respectively provided with support plates 46 (Figure 3) on the opposite sides. The support plates 46 are connected to the reaction spring 7. The clamping structure 9 is a U-shaped structure, and the clamping structure 9 includes two spring bracket side edges 91 arranged opposite to each other. And a spring support bottom 92 connected between the two spring support side edges 91, the contact spring 40 is arranged between the spring support bottom 92 and the inner side surface of the top plate 43 and respectively abuts against the inner side surfaces of the spring support bottom 92 and the top plate 43, the two first side plates 41 are respectively arranged higher than the top plate 43, and a slide groove 47 is respectively provided on the side surfaces facing each other of the two first side plates 41, the two spring support side edges 91 are respectively located in the slide groove 47 for sliding fit, and the ends of the two spring support side edges 91 away from the spring support bottom 92 respectively extend from the slide groove 47 to On the outside of the top plate 43, the two spring support side edges 91 are located on the outside of the top plate 43, and one end is connected to a pressure rod 93. The movable contact 5 is disposed between the pressure rod 93 and the outer side surface of the top plate 43. The pressure rod 93 is used to press the movable contact 5 against the top plate 43 to engage the upper limit. The movable contact 5 is provided with a limiting boss 95 that cooperates with the pressure rod 93. The two spring support side edges 91 are each provided with a clearance hole 94 for passing the linkage shaft 20. The clearance hole 94 is elongated, and the length direction of the clearance hole 94 is arranged parallel to the movement direction of the contact support 4. Of course, the clamping structure 9 can also adopt other shapes and fall within the scope of protection of the present invention. For example, the linkage shaft 20 passes through the first support holes in the two first side plates 41 and passes above the pressure rod 93. It is also possible to omit the clearance hole 94 on the two spring support side edges 91.

[0052] As shown in FIG3 , the electromagnetic system 2 includes an upper armature 21 and a fixed lower armature 25, and a coil 22 is disposed between the upper armature 21 and the lower armature 25. The coil 22 is used to generate an electromagnetic force to drive the upper armature 21 to move toward the lower armature 25. In this embodiment, the electromagnetic system 2 includes a U-shaped lower armature 25 and a coil skeleton 26 disposed on the inner side of the lower armature 25. The coil 22 is disposed on the outer side of the coil skeleton 26. The upper armature 21 is T-shaped. The upper armature 21 includes a first linkage portion 211 and a second linkage portion 212 connected to the middle of the first linkage portion 211. A linkage hole 213 is provided at the connection between the first linkage portion 211 and the second linkage portion 212. The two ends of the linkage shaft 20 are respectively inserted into the linkage holes 213 of the upper armatures 21 of the two electromagnetic systems 2, so that the two upper armatures 21 can drive the linkage shaft 20 to move. The second linkage portion 212 is inserted into the inner side of the coil frame 26. The lower armature 25 is used to attract the second linkage portion 212, so that the second linkage portion 212 drives the upper armature 21 to move. The first linkage portion 211 is provided with a positioning member 214 at each end. The positioning member 214 is connected to a return spring (not shown in the figure). The return spring is used to drive the upper armature 21 to reset. The upper armature 21 with a T-shaped structure can maintain balance through the first linkage portion 211 while being connected to the linkage shaft 20, and can ensure reliable attraction with the coil 22 through the second linkage portion 212, which has the characteristics of compact structure and small size. Of course, the electromagnetic system 2 can also use other existing technologies to attract the upper armature 21 to move, and the shape of the upper armature 21 and the lower armature 25 can also be adjusted. For example, the upper armature 21 or the lower armature 25 is an inverted T-shape, a U-shape, or a sideways E-shape, which all fall within the scope of protection of the present invention.

[0053] It should be noted that in the description of the present invention, the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are conventionally placed directions or positional relationships during use. They are intended solely for ease of description and do not indicate that the devices or components referred to must have a specific direction. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," "third," etc., are used solely to distinguish descriptions and should not be construed as indicating relative importance.

[0054] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art to which the present invention belongs, simple deductions or substitutions can be made without departing from the concept of the present invention, and all of these should be considered to fall within the scope of protection of the present invention.

Claims

1. A switch electrical appliance, characterized in that: The invention comprises a housing, a contact system (1) and two groups of electromagnetic systems (2) respectively arranged in the housing, wherein the two groups of electromagnetic systems (2) are arranged on both sides of the contact system (1) relatively to each other, and the two groups of electromagnetic systems (2) respectively comprise an upper armature (21) and a coil (22) for driving the upper armature (21) to move, and the upper armatures (21) of the two groups of electromagnetic systems (2) are connected via a linkage shaft (20), and the contact system (1) comprises a stationary contact (3) and a moving contact (5) arranged on a contact support (4), and the linkage shaft (20) is connected to the contact support (4), and the two groups of electromagnetic systems (2) respectively drive the contact (5) and the contact support (4) to move via the linkage shaft (20), so that the contact support (4) drives the moving contact (5) to contact and separate with the stationary contact (3).

2. The switch device according to claim 1, characterized in that: The two groups of electromagnetic systems (2) are arranged relatively on both sides of the contact support (4) along a first direction, the coil (22) is used to drive the upper armature (21) to move along a second direction, and drive the contact support (4) to move along the second direction, the incoming line end and the outgoing line end of the contact system (1) are arranged along a third direction, and the first direction, the second direction and the third direction are arranged perpendicular to each other.

3. The switch device according to claim 2, characterized in that: Two stationary contacts (3) serving as an incoming line end and an outgoing line end are respectively arranged on both sides of the contact support (4), the two stationary contacts (3) are arranged along a third direction, and the contact support (4) is used to drive the moving contact (5) to contact and separate from the stationary contacts 3 at both ends at the same time.

4. The switch device according to claim 1, characterized in that: A circuit board (23) connected to the two sets of electromagnetic systems (2) is provided in the housing. The circuit board (23) is provided with a control unit and a current collection circuit. The control unit is connected to the electromagnetic system (2) for driving the electromagnetic system (2) to operate. The control unit is connected to the current collection circuit for collecting the current of the main circuit. When an overload or short circuit fault occurs, the electromagnetic system (2) is driven to operate, so that the electromagnetic system (2) drives the moving contact (5) to separate from the static contact (3).

5. The switch device according to claim 4, characterized in that: The circuit board (23) is provided with a voltage collection circuit, and the control unit is connected to the voltage collection circuit for collecting the voltage of the main circuit, and drives the electromagnetic system (2) to operate when an overvoltage or undervoltage fault occurs, so that the electromagnetic system (2) drives the moving contact (5) to separate from the static contact (3); and / or the circuit board (23) includes a quick release circuit, which is connected to the coil (22) of the electromagnetic system (2) and is used to eliminate the residual current in the coil (22).

6. The switch device according to claim 1, characterized in that: The shell comprises a base (61) and an arc extinguishing hood (62) arranged on the top side of the base (61); an upper cover (63) is arranged above the arc extinguishing hood (62); the contact system (1) is arranged inside the arc extinguishing hood (62) and the base (61); an arc extinguishing mechanism is arranged in the arc extinguishing hood (62); two protruding boss structures (64) are arranged on the top side of the base (61); and groove structures (66) for accommodating the electromagnetic system (2) are respectively arranged in the middle of the two boss structures (64).

7. The switch device according to claim 6, characterized in that: The groove structure (66) is provided with a notch near the side wall of the shell, and the shell is provided with a side cover (67) corresponding to the notch.

8. The switch device according to claim 6, characterized in that: A bottom cover (68) is provided on the bottom side of the base (61), and a reaction force spring (7) connected to the contact support (4) is provided between the base (61) and the bottom cover (68).

9. The switch device according to claim 6, characterized in that: Two circuit boards (23) are arranged in the shell, and the two circuit boards (23) are respectively connected to the coils (22) of the two sets of electromagnetic systems (2); a bottom cover (68) is arranged on the bottom side of the base (61), and the two circuit boards (23) are respectively located below the corresponding electromagnetic systems (2) and are arranged between the base (61) and the bottom cover (68).

10. The switch device according to claim 9, characterized in that: Two sets of wiring mechanisms are respectively provided on the boss structure (64) of the housing corresponding to each set of electromagnetic systems (2), and each set of wiring structures includes two sets of contact terminals (27) connected to the circuit board (23), and the contact terminals (27) are used to connect the control circuit of the corresponding electromagnetic system (2).

11. The switch device according to claim 6, characterized in that: The contact system (1) is provided with a plurality of supporting structures, each of which is provided with a moving contact (5), and the plurality of supporting structures are sequentially arranged along the length direction of the linkage shaft (20). The arc extinguishing cover (62) is provided with a partition plate (621) between two adjacent supporting structures, and the partition plate (621) is provided with a linkage groove (622) for avoiding the linkage shaft (20) on the side close to the base (61), and the linkage shaft (20) passes through the plurality of supporting structures sequentially.

12. The switch device according to claim 2, characterized in that: The two ends of the moving contact (5) in the third direction are respectively provided with an arc extinguishing structure (83), and the arc extinguishing structure (83) comprises a plurality of arc extinguishing plates arranged at intervals; the two ends of the moving contact (5) in the third direction are respectively provided with an arc striking plate (81) and an arc isolating plate (82), and the corresponding arc extinguishing structure (83) is located between the arc striking plate (81) and the arc isolating plate (82), the arc striking plate (81) is located on the side of the arc extinguishing structure (83) close to the moving contact (5), and the arc isolating plate (82) is located on the side of the arc extinguishing structure (83) away from the moving contact (5), the arc striking plate (81) is used to guide the arc to the arc extinguishing structure (83), and the arc isolating plate (82) is used to separate the arc.

13. The switch device according to claim 1, characterized in that: The contact support (4) is provided with a contact spring (40) and a clamping structure (9) connected to the contact spring (40). The clamping structure (9) extends to the outside of the contact support (4) and is used to push the moving contact (5). The contact spring (40) drives the moving contact (5) to be pressed against the upper limit position of the outer side surface of the contact support (4) through the clamping structure (9). When the contact support (4) drives the moving contact (5) to contact the stationary contact (3), the moving contact (5) is pressed against the upper limit position of the stationary contact (3). The contact support (4) moves and compresses the contact spring (40). The contact spring (40) drives the moving contact (5) to be pressed against the upper limit position of the stationary contact (3) through the clamping structure (9).

14. The switch device according to claim 13, characterized in that: The contact support (4) comprises two first side plates (41) arranged opposite to each other, and two second side plates (42) connected between the two first side plates (41), the two first side plates (41) and the two second side plates (42) being connected via a top plate (43), a support space for accommodating a clamping structure (9) and a contact spring (40) being formed between the two first side plates (41), the two second side plates (42) and the top plate (43), and a cover plate (44) arranged opposite to the top plate (43), the cover plate (44) being used to cover an opening position of the support space, the two first side plates (41) and the two second side plates (42) being connected to each other via a top plate (43), 1) and a top plate (43) are respectively provided with a first supporting hole and a second supporting hole for passing the linkage shaft (20); the linkage shaft (20) passes through the first side plate (41) and the top plate (43) from the first supporting hole and the second supporting hole respectively, and is used to drive the contact (5) and the contact support (4) to move; the two second side plates (42) are respectively provided with supporting plates (46) on the opposite sides; the supporting plates (46) are connected to the reaction spring (7); the clamping structure (9) is a U-shaped structure; the clamping structure (9) includes two spring support side edges (91) arranged opposite to each other, and a spring connected between the two spring support side edges (91) The bottom (92) of the bracket, the contact spring (40) is arranged between the bottom (92) of the spring bracket and the inner side surface of the top plate (43) and respectively abuts against the bottom (92) of the spring bracket and the inner side surface of the top plate (43), the two first side plates (41) are respectively arranged higher than the top plate (43), and the two first side plates (41) are respectively provided with a slide groove (47) on the side surfaces facing each other, the two spring bracket side edges (91) are respectively located in the slide groove (47) for sliding fit, and one end of the two spring bracket side edges (91) away from the bottom (92) of the spring bracket respectively extends from the slide groove (47) to the outer side of the top plate (43), and the two The spring bracket side edge (91) is located at one end of the outer side of the top plate (43) and is connected to the pressure rod (93). The moving contact (5) is arranged between the pressure rod (93) and the outer side surface of the top plate (43). The pressure rod (93) is used to press the moving contact (5) to the upper limit position of the top plate (43). A limiting boss (95) cooperating with the pressure rod (93) is provided on the moving contact (5). The two spring bracket side edges (91) are respectively provided with avoidance holes (94) for passing the linkage shaft (20). The avoidance holes (94) are in the shape of long strips, and the length direction of the avoidance holes (94) is arranged parallel to the moving direction of the contact support (4).

15. The switch device according to claim 1, characterized in that: The electromagnetic system (2) comprises an upper armature (21) and a fixed lower armature (25), a coil (22) being arranged between the upper armature (21) and the lower armature (25), and the coil (22) being used to generate an electromagnetic force to drive the upper armature (21) to move in the direction of the lower armature (25).

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