An insulating base and switchgear

Abstract

The application discloses an insulating base and a switch electric appliance, relates to the technical field of contactors and relays, and discloses the insulating base, which comprises a base body, auxiliary moving contact pieces, two auxiliary moving contact pieces are arranged at two end portions of the base body in a first direction respectively, and end portions of the auxiliary moving contact pieces are provided with auxiliary moving contact points, and a baffle mechanism, which comprises a first plate body arranged on the bottom surface of the base body, two first convex edges are symmetrically arranged at two end portions of the first plate body in the first direction, a first recess is formed between the two first convex edges, and the first recess is located directly below the auxiliary moving contact points, a second plate body is arranged on the bottom surface of the first plate body, and a creepage gap is arranged between the second plate body and the first plate body. The insulating base solves the technical problem that, due to small assembly space, the creepage insulation capacity of the insulating base is insufficient, and the main circuit and the auxiliary end of the switch electric appliance are easily broken down under high voltage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of contactors and relays, in particular to an insulating base and a switching device. BACKGROUND

[0002] With the continuous improvement of market demand, the products of the switching device industry are also constantly innovating and upgrading, especially contactors and relays, which still have many deficiencies and need to be developed and improved.

[0003] The existing switching device has a small assembly space, and the creepage insulation capability of the insulating base is insufficient, which causes the switching device to be easily broken down at a large voltage in the main circuit and auxiliary end. Therefore, an insulating base and a switching device are provided to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide a switching device, which solves the technical problem that the existing switching device has a small assembly space, and the creepage insulation capability of the insulating base is insufficient, which causes the switching device to be easily broken down at a large voltage in the main circuit and auxiliary end.

[0005] To achieve the above purpose, the present application provides a switching device, comprising: a base body;

[0006] An auxiliary moving contact is arranged at each end of the base body in the first direction, and the end of the auxiliary moving contact is provided with an auxiliary moving contact point.

[0007] A baffle mechanism comprises:

[0008] A first plate body is arranged on the bottom surface of the base body, two first convex edges are symmetrically arranged at the two ends of the first plate body in the first direction, a first recess is formed between the two first convex edges, and the first recess is located directly below the auxiliary moving contact point.

[0009] A second plate body is arranged on the bottom surface of the first plate body, and a creepage gap is arranged between the second plate body and the first plate body.

[0010] Preferably, the first plate body is provided with a second convex edge at each end in the second direction, the second plate body is provided with a third convex edge at each end in the second direction, the creepage gap is formed between the second convex edge and the third convex edge, and the second direction is perpendicular to the first direction.

[0011] Preferably, the second plate body is symmetrically provided with two fourth convex edges at each end in the first direction, a second recess is formed between the two fourth convex edges, and the second recess is located directly below the first recess.

[0012] Preferably, the inner side of the second groove protrudes in the first direction and the second direction from the inner side of the first groove.

[0013] Preferably, the width of the first groove in the second direction is greater than the width of the auxiliary moving contact in the second direction.

[0014] Correspondingly, the application also provides a switch electric appliance, comprising the insulating base of any one of the above, further comprising an electromagnetic system and a ceramic cover, the inside of the ceramic cover forms a closed cavity, a moving support is arranged in the closed cavity, the moving support is connected to the telescopic end of the electromagnetic system, the top surface of the moving support is provided with a supporting spring, the upper end of the supporting spring is provided with a driving contact, the two ends of the driving contact are respectively provided with a driving contact head, the top surface of the ceramic cover is provided with two main static contact heads, the two main static contact heads are respectively located directly below one of the driving contact heads, the moving support is driven to reciprocate in the third direction by the electromagnetic system, so as to control the contact and separation of the driving contact head and the main static contact head, and further control the on or off of the circuit of the switch electric appliance, wherein the third direction is perpendicular to the first direction and the second direction.

[0015] Preferably, the top surface of the ceramic cover is provided with two lead terminals, the lower ends of the two lead terminals are respectively provided with auxiliary static contacts, and the two auxiliary static contacts are respectively located above the corresponding auxiliary moving contacts.

[0016] Preferably, the inside of the ceramic cover is provided with two inner side protrusions on both sides in the second direction, the four inner side protrusions are respectively located on both sides of the first plate body in the first direction, and the four inner side protrusions separate the internal space of the ceramic cover into an end space and a middle space, so as to separate the arc striking space of the driving contact and the arc creeping space of the auxiliary moving contact.

[0017] Preferably, the driving contact head comprises an upper contact head and a lower contact head, the circumferential outer side of the upper contact head is an upper arc striking surface, the upper arc striking surface is entirely spherical, the circumferential outer side of the lower contact head is a first lower arc striking surface, the first lower arc striking surface is entirely spherical, and the side of the upper contact head facing the driving contact is provided with an arc separation groove, and the arc separation groove is provided with a first transition arc striking surface at the joint position of the upper contact head.

[0018] Preferably, the lower side of the two end surfaces of the driving contact in the first direction is provided with a second lower arc striking surface, and the joint position of the second lower arc striking surface and the first lower arc striking surface is provided with a second transition arc striking surface.

[0019] With respect to the above background, the switch electric appliance provided by the present application has the following beneficial effects: the first plate body and the second plate body are arranged in sequence on the bottom surface of the base body to increase the creepage distance, and the creepage gap is arranged between the first plate body and the second plate body to form the creepage space and increase the creepage distance, so that the creepage insulation capability of the insulating base is greatly increased under the condition of effective assembly space, thereby avoiding the phenomenon that the main circuit and the auxiliary terminal of the switch electric appliance are broken down under high voltage. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description only constitute the embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0021] Figure 1 a perspective view of the insulating base provided by the embodiment of the present application;

[0022] Figure 2 a top view of the insulating base provided by the embodiment of the present application;

[0023] Figure 3 a sectional view of the insulating base provided by the embodiment of the present application;

[0024] Figure 4 a perspective view of the insulating base provided by the second embodiment of the present application;

[0025] Figure 5 a perspective view of the insulating base provided by the third embodiment of the present application;

[0026] Figure 6 a perspective view of the insulating base provided by the fourth embodiment of the present application;

[0027] Figure 7 a perspective view of the insulating base provided by the fifth embodiment of the present application;

[0028] Figure 8 a perspective view of the switch electric appliance provided by the embodiment of the present application;

[0029] Figure 9 a sectional view of the switch electric appliance provided by the first angle of the embodiment of the present application;

[0030] Figure 10 a sectional view of the switch electric appliance provided by the second angle of the embodiment of the present application;

[0031] Figure 11A third angle cross-sectional view of the switch electric appliance provided by the embodiment of the present application;

[0032] Figure 12 A third angle cross-sectional view of the switch electric appliance provided by the embodiment of the present application; Figure 9 An enlarged view of A in the middle;

[0033] Figure 13 A third angle cross-sectional view of the switch electric appliance provided by the embodiment of the present application; Figure 10 An enlarged view of B in the middle;

[0034] Figure 14 An assembly view of the mobile support and the insulating base provided by the embodiment of the present application;

[0035] Figure 15 An exploded view of the mobile support and the insulating base provided by the embodiment of the present application;

[0036] Figure 16 An exploded view of the mobile support and the insulating base provided by the embodiment of the present application;

[0037] Figure 17 A perspective view of the active contact provided by the embodiment of the present application;

[0038] Figure 18 A side view of the active contact provided by the embodiment of the present application;

[0039] Figure 19 A top view of the active contact provided by the embodiment of the present application;

[0040] Figure 20 An assembly view of the wiring assembly provided by the embodiment of the present application;

[0041] Figure 21 A cross-sectional view of the wiring assembly provided by the embodiment of the present application;

[0042] Figure 22 A cross-sectional view of the wiring assembly provided by the sixth embodiment of the present application.

[0043] Specific, 1 - insulation base; 101 - base; 102 - auxiliary moving contact; 103 - auxiliary moving contact; 104 - second assembly groove; 105 - rivet point; 2 - baffle mechanism; 201 - first plate body; 2011 - first convex edge; 2012 - first groove; 202 - second plate body; 2021 - second convex edge; 2022 - third convex edge; 2023 - creepage gap; 2024 - fourth convex edge; 2025 - second groove; 3 - ceramic cover; 301 - inner side protrusion; 302 - end space; 303 - middle space; 304 - wire hole; 305 - assembly hole; 4 - moving bracket; 401 - first limiting groove; 5 - main static contact; 6 - electromagnetic system; 601 - push-pull rod; 7 - insulating gasket; 701 - positioning protrusion; 702 - first through hole; 8 - lead terminal; 801 - vertical section; 802 - bending section; 803 - auxiliary static contact; 9 - magnetic steel; 10 - connecting bracket; 11 - rivet; 12 - mounting plate; 13 - insulating limiting plate; 1301 - second through hole; 14 - support spring; 15 - main moving contact; 1501 - limiting protrusion; 1502 - second limiting groove; 1503 - first assembly groove; 16 - main moving contact; 1601 - upper contact; 1602 - upper arc leading surface; 1603 - lower contact; 1604 - first lower arc leading surface; 17 - arc separation groove; 18 - first transition arc leading surface; 19 - second lower arc leading surface; 20 - second transition arc leading surface; 21 - arc surface; 2101 - first arc surface section; 2102 - second arc surface section; 22 - tangent; 23 - straight edge; 24 - PCB; 2401 - solder hole; 2402 - plug-in end. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0045] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0046] As shown in Figure 1 , Figure 2 and Figure 3 , in order to achieve the above-mentioned purpose, the present application provides a switching electrical appliance, comprising a base 101 and a baffle mechanism 2, wherein the base 101 is made of conductive material, which can be optionally made of copper material, mainly used for connecting auxiliary end circuit.

[0047] The baffle mechanism 2 comprises: a first plate body 201 and a second plate body 202, both of which are plastic pieces incapable of conducting electricity, the first plate body 201 is arranged on the bottom surface of the base body 101, and the second plate body 202 is arranged on the bottom surface of the first plate body 201, so as to increase the creepage distance by sequentially arranging the first plate body 201 and the second plate body 202 on the bottom surface of the base body 101. A creepage gap 2023 is arranged between the second plate body 202 and the first plate body 201. It should be noted that the creepage gap 2023 does not completely block the electric arc, but forms a creepage space to increase the creepage distance, thereby greatly increasing the creepage insulation capability of the insulating base 1 under the condition of effective assembly space, so as to avoid the phenomenon that the main circuit and the auxiliary end of the switch electric appliance are broken down under high voltage.

[0048] The base body 101 is respectively provided with an auxiliary moving spring piece 102 at both ends in the first direction, the first direction is the X direction in the figure, and the end of the auxiliary moving spring piece 102 is provided with an auxiliary moving contact 103. Figure 2 The first plate body 201 is respectively provided with two first protrusions 2011 symmetrically arranged at both ends in the first direction, the outer side of the first protrusion 2011a exceeds the auxiliary moving contact 103, a first recess 2012 is formed between the two first protrusions 2011, the first recess 2012 is located directly below the auxiliary moving contact 103, and when the auxiliary moving contact 103 is in abutting cooperation with the auxiliary static contact 803, the auxiliary moving contact 103 will move a certain distance towards the first plate body 201 due to the elastic effect of the auxiliary spring piece, the first recess 2012 provides a certain avoiding space for the auxiliary moving contact 103, and the distance between the auxiliary moving spring piece 102 and the first plate body 201 can be effectively reduced, so as to reduce the longitudinal dimension of the insulating base 1, the longitudinal dimension is the third direction in the figure, and the third direction is the Z direction in the figure. Figure 1 The third direction is perpendicular to the first direction. On the other hand, the first recess 2012 can realize riveting on the lower side of the auxiliary moving contact 103, so as to facilitate welding of the auxiliary moving contact 103 on the auxiliary moving spring piece 102.

[0049] In some embodiments of the present application, the first plate body 201 is respectively provided with a second protrusion 2021 at both ends in the second direction, the second direction is perpendicular to the first direction and the third direction, and the second direction is the Y direction in the figure. Figure 1 The second plate body 202 is respectively provided with a third protrusion 2022 at both ends in the second direction, the second protrusion 2021 and the third protrusion 2022 form a creepage gap 2023, the distance between the creepage gap 2023 and the base body 101 is small, and the creepage distance can be maximized under the condition of limited longitudinal dimension.

[0050] As shown in FIG. 1, the auxiliary moving spring piece 102 is arranged on the base body 101, and the auxiliary moving contact 103 is arranged on the end of the auxiliary moving spring piece 102. Figure 4As shown, in the second embodiment of the present invention, two fourth protrusions 2024 are symmetrically arranged at both ends of the second plate 202 in the first direction, and a second groove 2025 is formed between the two fourth protrusions 2024. The second groove 2025 is located directly below the first groove 2012, and the inner side of the first groove 2012 and the inner side of the second groove 2025 are on the same vertical line. The second groove 2025 can cooperate with the first groove 2012 to rivet the auxiliary moving contact 103.

[0051] like Figure 5 As shown, in the third embodiment of the present invention, the inner side of the second groove 2025 protrudes from the inner side of the first groove 2012 in the first direction and the second direction, respectively. The inner side of the second groove 2025 is further outward than the inner side of the first groove 2012. By sacrificing a certain amount of riveting space, the creepage distance of the second plate 202 is further increased.

[0052] like Figure 6 As shown, in the fourth embodiment of the present invention, the width D1 of the first groove 2012 in the second direction is greater than the width D2 of the auxiliary moving contact 103 in the second direction. When the movable bracket 4 is driven to reciprocate along the third direction to control the movement of the auxiliary moving spring 102 along the third direction, the auxiliary moving contact 103 can enter the first groove 2012 to ensure that the first groove 2012 provides clearance space for the auxiliary moving contact 103, allowing the auxiliary moving contact 103 to move up and down smoothly within the first groove 2012. While reducing the distance between the auxiliary moving spring 102 and the first plate 201, sufficient movement space is ensured for the auxiliary moving contact along the third direction, effectively reducing the longitudinal dimension of the insulating base 1.

[0053] like Figure 7 As shown, in the fifth embodiment of the present invention, when the second plate 202 is assembled after the auxiliary moving contact 103 is riveted, or when the riveting point 105 between the auxiliary moving contact 103 and the auxiliary moving spring 102 is not on the lower side of the auxiliary moving contact 103, the second plate 202 may be provided without the second groove 2025.

[0054] like Figure 2 , Figure 3 and Figure 5 As shown, in some embodiments of the present invention, the length of the second plate 202 in the first direction is less than the length of the first plate 201 in the first direction. After the first plate 201 and the second plate 202 are assembled, the whole is inverted trapezoidal. Of course, the length of the second plate 202 in the first direction can also be the same as the length of the first plate 201 in the first direction. Its main purpose is to adapt to the shape of the movable bracket 4 in the switchgear, so that the insulating base 1 can be stably installed on the movable bracket 4 in the switchgear.

[0055] As Figure 8 , Figure 9 and Figure 10 shown, the application also provides a switch electrical appliance, further comprising an electromagnetic system 6 and a ceramic cover 3, the inner side of the ceramic cover 3 forms a sealed cavity, a moving bracket 4 is arranged in the sealed cavity, the moving bracket 4 is connected to the telescopic end of the electromagnetic system 6, in addition, a supporting spring 14 is arranged on the top surface of the moving bracket 4, the upper end of the supporting spring 14 is provided with an active contact piece 15, two active contact heads 16 are arranged at the two ends of the active contact piece 15 respectively, two assembly holes 305 are arranged on the top surface of the ceramic cover 3, one main static contact head 5 is embedded in each of the two assembly holes 305, the two active contact heads 16 are located directly above one main static contact head 5 respectively, the electromagnetic system 6 can drive the moving bracket 4 to reciprocate along the third direction through the driving push-pull rod 601, so as to control the active contact head 16 and the main static contact head 5 to contact and separate, so as to make the circuit of the switch electrical appliance conductive or disconnected. The active contact piece 15 is elastically supported by the supporting spring 14, when the active contact head 16 abuts against the main static contact head 5, the supporting spring 14 will be compressed and contracted by a certain length, so as to avoid the rigid collision between the active contact head 16 and the main static contact head 5, and the active contact head 16 and the main static contact head 5 are protected, and the service life of the whole switch electrical appliance is prolonged.

[0056] In some embodiments of the application, two lead terminals 8 are arranged on the top surface of the ceramic cover 3, the lower ends of the two lead terminals 8 are respectively provided with auxiliary static contact points 803, and the auxiliary static contact points 803 are located above the corresponding auxiliary dynamic contact points 103 respectively. When the circuit is turned on, the moving bracket 4 is driven to move along the third direction by the driving push-pull rod 601 of the control electromagnetic system 6, before the active contact head 16 abuts against the main static contact head 5, the auxiliary dynamic contact points 103 first contact the auxiliary static contact points 803 to connect the capacitive load, and the moving bracket 4 is continuously driven to move along the third direction by the driving push-pull rod 601 of the control electromagnetic system 6 until the main contact piece abuts against the static contact piece to connect the main circuit, so that the auxiliary contact piece assembly first connects the capacitive load, solves the influence of the capacitive load, does not affect the contact resistance after the main contact piece connects the main circuit, and effectively increases the stability of the contact resistance.

[0057] It should be noted that the two sides of the ceramic cover 3 in the second direction are respectively provided with magnetic steel 9, when the active contact head 16 is separated from the main static contact head 5, the two active contact heads 16 are respectively located at the center position of the magnetic field generated by the magnetic steel 9, at this time, the larger magnetic field force at the separation position of the active contact head 16 and the main static contact head 5 can generate a larger Lorentz force on the arc, further increasing the bending amplitude of the arc formed by magnetic blow, so that the arc is more easily extinguished.

[0058] As Figure 11As shown in the drawings, in some embodiments of the present application, two inner side protrusions 301 are arranged on both sides of the inner side of the ceramic cover 3 in the second direction, four inner side protrusions 301 are arranged on both sides of the first plate body 201 in the first direction, and the four inner side protrusions 301 divide the internal space of the ceramic cover 3 into an end space 302 and a middle space 303. The end space 302 is an arc striking and extinguishing space for the main movable contact, and the middle space 303 is an arc creeping space for the auxiliary movable contact 103. By separating the arc striking and extinguishing space for the main movable contact and the arc creeping space for the auxiliary movable contact 103, the high voltage and current in the end space 302 can be effectively prevented from damaging the low voltage in the middle space 303 through creeping.

[0059] As shown in the drawings, Figure 14 , Figure 15 and Figure 16 As shown in the drawings, in some embodiments of the present application, two connecting supports 10 are arranged symmetrically on the top surface of the moving support 4, the upper part of the connecting support 10 is provided with a socket, the top surface of the main movable contact 15 is provided with an insulating pad 7, the two ends of the insulating pad 7 in the first direction are provided with positioning protrusions 701, the positioning protrusions 701 are inserted into the socket, the insulating pad 7 is fixed by the two connecting supports 10, and the top of the main movable contact 15 is supported by the supporting spring 14, so that the insulating pad 7 is stably fixed on the top surface of the main movable contact 15.

[0060] In addition, a first through hole 702 is arranged on the top surface of the insulating pad 7, a rivet 11 is inserted into the first through hole 702, a mounting plate 12 is sleeved on the outer circumferential side of the upper end of the rivet 11, a first assembly groove 1503 is arranged on the top surface of the main movable contact 15 for accommodating the lower end of the rivet 11, a second assembly groove 104 is arranged on the top surface of the base body 101 for accommodating the mounting plate 12, the bottom surface of the mounting plate 12 is attached to the bottom surface of the second assembly groove 104, and the mounting plate 12 is fixed in the second assembly groove 104 by a screw, so as to fix the base body 101 on the top surface of the insulating pad 7.

[0061] It should be noted that a limiting protrusion 1501 is arranged on the bottom surface of the main movable contact 15, a first limiting groove 401 is arranged on the top surface of the moving support 4, the upper end of the supporting spring 14 is clamped by the limiting protrusion 1501, and the lower end of the supporting spring 14 is clamped by the first limiting groove 401. The design of the limiting protrusion 1501 and the first limiting groove 401 can stably limit the two ends of the supporting spring 14, so as to ensure the stability of the reciprocating movement of the main movable contact 15 in the third direction, and further ensure that the switch appliance can stably control the conduction or disconnection of the circuit.

[0062] Optionally, an insulating limiting plate 13 is arranged on the bottom surface of the active contact 15, the insulating limiting plate 13 is in a U shape as a whole, the active contact 15 is clamped and embedded on the top surface of the insulating limiting plate 13, meanwhile, a second through hole 1301 is arranged on the bottom surface of the insulating limiting plate 13, the second through hole 1301 is used for penetrating the supporting spring 14, the through hole and the limiting protrusion 1501 are combined to form a second limiting groove 1502, and the upper end of the supporting spring 14 is stably clamped in the second limiting groove 1502. Meanwhile, through the cooperation of the insulating limiting plate 13 and the insulating pad 7, the active contact 15 can be isolated from other components, thereby playing a role in protecting the overall switch appliance.

[0063] As shown in Figure 17 , Figure 18 and Figure 19 , in some embodiments of the present application, the active contact 16 comprises an upper contact 1601 and a lower contact 1603, the circumferential outer side of the upper contact 1601 is an upper arc surface 1602, the upper arc surface 1602 is in a spherical shape as a whole; the circumferential outer side of the lower contact 1603 is a first lower arc surface 1604, the first lower arc surface 1604 is in a spherical shape as a whole, the upper arc surface 1602 and the first lower arc surface 1604 are smoothly connected, then from the top surface of the upper contact 1601 to the bottom surface of the lower contact 1603, the diameter of the active contact 16 is first increased and then decreased, when the active contact 16 is disconnected with the main static contact 5, the electric arc can be quickly pulled from the upper contact 1601 to the lower side surface of the active contact 15 and the lower side space of the active contact 15 through the upper arc surface 1602 and the first lower arc surface 1604, the moving speed of the electric arc on the surface of the active contact 16 is increased, the electric arc separation between the active contact 16 and the main static contact 5 is accelerated, other components are prevented from being burned by the electric arc to a certain extent, the voltage erosion of the active contact 16 is reduced, the electric arc extinguishing speed is accelerated, and thus the erosion influence of the electric arc on the active contact 15 is greatly reduced.

[0064] The upper contact 1601 is provided with an arc separation groove 17 on the side facing the center of the active contact 15, which is used to separate the active contact 15 and the upper contact 1601. The arc separation groove 17 is arc-shaped as a whole and is designed around the circumferential outer side of the upper contact 1601. The arc separation groove 17 is provided with a first transition arc leading surface 18 at the joint position with the upper contact 1601. The first transition arc leading surface 18 forms an arc leading path, which guides the arc in the arc separation groove 17 to move quickly to a second transition arc leading surface 20 and a second lower arc leading surface 19. In addition, the second lower arc leading surface 19 is arranged on the lower part of the end surface of the active contact 15 in the second direction. The second lower arc leading surface 19 is provided with a second transition arc leading surface 20 at the joint position with the first lower arc leading surface 1604. The first transition arc leading surface 18, the first lower arc leading surface 1604, the second transition arc leading surface 20 and the second lower arc leading surface 19 form a complete arc leading path, which facilitates the arc to quickly creep from the arc separation groove 17 and the lower contact 1603, further accelerates the arc extinction speed, and thus greatly reduces the erosion effect of the arc on the active contact 15.

[0065] In some embodiments of the application, the top surface of the upper contact 1601 and the bottom surface of the lower contact 1603 are both flat surfaces. The top surface of the upper contact 1601 protrudes in the third direction from the top surface of the active contact 15, that is, the top surface of the upper contact 1601 protrudes by a height H1 compared to the top surface of the active contact 15. The bottom surface of the lower contact 1603 is coplanar with the bottom surface of the active contact 15. At this time, the length and the inclination angle of the upper arc leading surface 1602 can be increased, which further increases the traction on the arc and the arc creeping speed, thus accelerating the arc extinction speed and greatly reducing the erosion effect of the arc on the active contact 15.

[0066] In some embodiments of the present application, the two end surfaces of the active contact 15 in the second direction are arc surfaces 21, which include: a first arc surface section 2101 and a second arc surface section 2102 connected smoothly, the first arc surface section 2101 is matched with the first transition arc surface 18, and the second arc surface section 2102 is matched with the second lower arc surface 19, at the same time, the curvature of the first arc surface section 2101 is greater than that of the second arc surface section 2102, and the tangent line 22 at the position of one end of the second arc surface section 2102 close to the side surface of the active contact 15 is perpendicular to the second direction. When the electric arc in the arc gap 17 moves quickly to the second transition arc surface 20 and the second lower arc surface 19, by designing the edge of the active contact 15 as an arc structure, the electric arc is sequentially pulled to the inside of the ceramic cover 3 through the first arc surface section 2101 and the second arc surface section 2102. Compared with the structure design of the traditional active contact 15 with a straight edge 23, the electric arc is closer to the magnetic steel 9 at the position of one end of the second arc surface section 2102 close to the inside of the ceramic cover 3, so that the electric arc receives a greater magnetic field force when it is close to the magnetic steel 9, the bending amplitude of the electric arc formed by magnetic blow is greater, and the electric arc is more easily extinguished, thereby significantly improving the arc extinguishing efficiency. At the same time, it can also avoid the electric arc from hitting the auxiliary end of the middle part of the ceramic cover 3, effectively preventing the electric arc from damaging the auxiliary end of the middle space 303 in the form of creeping.

[0067] As shown in Figure 20 and Figure 21 In some embodiments of the present application, a wiring assembly is also provided, which includes: a PCB board 24 arranged on the top surface of the ceramic cover 3, the PCB board 24 is provided with a plurality of solder holes 2401, and the PCB board 24 is also provided with a plurality of lead terminals 8, and the top surface of the ceramic cover 3 is provided with a plurality of through wire holes 304, which extend along the third direction when the top surface of the ceramic cover 3 coincides with the horizontal plane. The number of lead terminals 8, wire holes 304 and solder holes 2401 is consistent, specifically, two through wire holes 304 are arranged on the top surface of the ceramic cover 3, two solder holes 2401 are arranged on the top surface of the PCB board 24, and each lead terminal 8 is arranged in the wire hole 304 and the solder hole 2401. It should be noted that the lead terminal 8 includes a vertical section 801 and a bent section 802, which are integrally formed, the vertical section 801 is arranged in the wire hole 304, and the bent section 802 is arranged in the solder hole 2401. It should be noted that the highest point of the outer circumferential surface of the bent section is not higher than the upper surface of the PCB board 24, which reduces the protruding part of the lead terminal 8 on the upper side of the PCB board 24, and can effectively reduce the longitudinal size of the wiring assembly, thereby reducing the longitudinal size of the switch device, i.e. the size of the switch device in the Z direction, which is beneficial to the miniaturization of the high-voltage switch device. Figure 1

[0068] ​It should be noted that the welding hole 2401 extends along the third direction, and the PCB 24 is provided with a plugging end 2402 for connecting the lead terminal 8 to a circuit, the bending direction of the bending section 802 is towards the plugging end 2402, and the lead terminal 8 is welded after the bending section 802 is accommodated in the welding hole 2401. By extending the welding hole 2401 along the third direction, the cross-sectional area of the welding hole 2401 is increased, the welding hole 2401 can accommodate more solder, the contact area between the solder and the bending section 802 is larger, the connection strength between the vertical metal rod and the PCB 24 is greatly enhanced, and the welding effect is better. Moreover, compared with the vertical metal rod directly penetrating through the welding hole 2401 of the PCB 24, the vertical metal rod can only be welded around the annular gap between the welding hole 2401 and the lead terminal 8. By extending the welding hole 2401 along the third direction, the cross-sectional area of the welding hole 2401 is increased, and the gap between the welding hole 2401 and the vertical metal rod is no longer needed to be operated during welding, which greatly reduces the difficulty of soldering and is more convenient for soldering operation. On the other hand, after the PCB 24 is fixed on the top surface of the ceramic cover 3, the two wire outlet holes 304 and the two welding holes 2401 are respectively located between the two main static contacts 5, and the bending section 802 extends along the third direction with the welding hole 2401, so that the space between the static contacts can be effectively utilized. A plurality of welding holes 2401 are respectively located above the wire outlet hole 304, which is beneficial to the miniaturization of the high-voltage switch device.

[0069] In some embodiments of the application, the PCB 24 is in a strip shape, and the PCB 24 is located between the two static contacts. Specifically, the PCB 24 extends along the first direction, and the strip-shaped PCB 24 is arranged between the two static contacts to ensure that the welding hole 2401 is arranged between the two static contacts with the wire outlet hole 304, and the space between the static contacts is effectively utilized. Of course, the PCB 24 can also be arranged on the top surface of the ceramic cover 3, which is more conducive to the installation and fixation of the PCB 24, and the specific position of the welding hole 2401 can be adjusted according to requirements.

[0070] In some embodiments of the application, the uppermost side of the outer circumferential surface of the bending section 802 is located in the same plane as the upper surface of the PCB 24, which can reduce the protruding part of the lead terminal 8 on the upper side of the PCB 24, reduce the longitudinal dimension of the wiring assembly, and further reduce the longitudinal dimension of the switch device, which is beneficial to the miniaturization of the high-voltage switch device.

[0071] As Figure 22As shown, in the sixth embodiment of the present application, a certain distance is provided between the uppermost side of the outer circumferential side of the bending section 802 and the upper surface of the PCB 24, and the distance between the uppermost side of the outer circumferential side of the bending section 802 and the upper surface of the PCB 24 is set as H2. On the one hand, the solder can cover the entire bending section 802 of the lead terminal 8 during soldering, further increasing the contact area between the solder and the bending section 802, and enhancing the connection strength between the vertical metal rod and the PCB 24. On the other hand, the entire solder hole 2401 can be used as a soldering entry point during the operation of the soldering step, effectively improving the convenience of soldering.

[0072] It should be noted that the solder hole 2401 is one of a rectangle, an ellipse, and a sector. When the solder hole 2401 is a rectangle, it can form a space suitable for the bending section 802, so that the bending section 802 can be accommodated in the solder hole 2401, and the lead terminal 8 can be soldered. When the solder hole 2401 is an ellipse, the gap between the bending section 802 and the intermediate position of the solder hole 2401 is greater than the gap between the bending section 802 and the intermediate position of the solder hole 2401. The greater gap between the bending section 802 and the intermediate position of the solder hole 2401 facilitates the soldering operation step, and improves the convenience of soldering. When the solder hole 2401 is a sector, the sector-shaped solder hole 2401 facilitates bending after the PCB 24 is installed, so that the bending precision requirement of the lead terminal 8 can be reduced before the PCB 24 is installed. By accurately adjusting the bending angle of the bending section 802 relative to the vertical section 801 according to the demand in the later stage, the practicability is better.

[0073] In summary, by sequentially arranging the first plate body 201 and the second plate body 202 on the bottom surface of the base body 101 to increase the creepage distance, and by arranging the creepage gap 2023 between the first plate body 201 and the second plate body 202 to form a creepage space, the creepage distance is further increased. Under the condition of effective assembly space, the creepage insulation capability of the insulating base 1 is greatly increased, and the phenomenon that the main circuit and the auxiliary terminal of the switch electric appliance are broken down under high voltage is effectively avoided.

[0074] It should be noted that in the present specification, the relationship terms such as first and second are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between the entities.

[0075] The principles and implementation modes of the present application are described by applying specific examples in the present document, and the above description of the examples is only used to help understand the method of the present application and its core idea. It should be noted that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. An insulating base, characterized in that, include: Matrix; Auxiliary moving springs, two of which are respectively disposed at the two ends of the base in a first direction, and the ends of the auxiliary moving springs are provided with auxiliary moving contacts; The baffle mechanism includes: A first plate is disposed on the bottom surface of the base. Two first protrusions are symmetrically provided at both ends of the first plate in the first direction. A first groove is formed between the two first protrusions. The first groove is located directly below the auxiliary moving contact. The second plate is disposed on the bottom surface of the first plate, and a creepage gap is provided between the second plate and the first plate.

2. An insulating base according to claim 1, wherein The first plate has a second protruding edge at each end in the second direction, and the second plate has a third protruding edge at each end in the second direction. The creepage gap is formed between the second protruding edge and the third protruding edge. The second direction is perpendicular to the first direction.

3. An insulating base according to claim 2, wherein The second plate has two fourth protrusions symmetrically arranged at its two ends in the first direction, and a second groove is formed between the two fourth protrusions. The second groove is located directly below the first groove.

4. An insulating base according to claim 3, wherein The inner side of the second groove protrudes from the inner side of the first groove in the first direction and the second direction, respectively.

5. An insulating base according to any one of claims 1-4, characterized in that The width of the first groove in the second direction is greater than the width of the auxiliary moving contact in the second direction, and the second direction is perpendicular to the first direction.

6. A switchgear, characterized by The insulating base, including any one of claims 1-5, further includes an electromagnetic system and a ceramic cover. A sealed cavity is formed inside the ceramic cover, and a movable support is disposed within the sealed cavity. The movable support is connected to the telescopic end of the electromagnetic system. A support spring is disposed on the top surface of the movable support, and an active contact piece is disposed at the upper end of the support spring. An active contact is disposed at each end of the active contact piece. Two main stationary contacts are disposed on the top surface of the ceramic cover, and each of the two main stationary contacts is located directly above one of the active contacts. The electromagnetic system drives the movable support to reciprocate along a third direction to control the contact and separation of the active contact and the main stationary contacts, thereby controlling the circuit of the switching device to be turned on or off. The second direction is perpendicular to the first direction, and the third direction is perpendicular to both the first and second directions.

7. A switchgear according to claim 6, characterised in that The top surface of the ceramic cover is provided with two lead terminals, and the lower ends of the two lead terminals are respectively provided with auxiliary stationary contacts, which are located above the corresponding auxiliary moving contacts.

8. A switchgear according to claim 7, characterised in that The inner side of the ceramic cover has two inner protrusions on each side in the second direction. The four inner protrusions are located on both sides of the first plate in the first direction. The four inner protrusions divide the internal space of the ceramic cover into an end space and a middle space to separate the active contact arc ignition space and the auxiliary active contact arc creepage space.

9. A switchgear according to claim 8, characterised in that The active contact includes: an upper contact and a lower contact, a circumferential outer side of the upper contact is an upper arc leading surface, the upper arc leading surface is overall spherical; a circumferential outer side of the lower contact is a first lower arc leading surface, the first lower arc leading surface is overall spherical; and a side of the upper contact facing the moving contact plate is provided with an arc separation groove, a first transition arc leading surface is arranged at a joint position of the arc separation groove and the upper contact.

10. A switchgear according to claim 9, characterised in that A second lower arc leading surface is arranged below both end surfaces of the active contact in the first direction, and a second transition arc leading surface is arranged at a joint position of the second lower arc leading surface and the first lower arc leading surface.

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