A high-voltage relay

Abstract

The application discloses a high-voltage relay and relates to the technical field of relays, which comprises an insulating cover arranged on a bottom plate and surrounding the bottom plate to form a contact working space; an insulating support which is hollow and has a side opening on the side wall, the insulating support is located in the insulating cover, a side gap which is in communication with the side opening is formed between the side wall of the insulating support and the inner wall of the insulating cover, and the side gap extends to the bottom of the insulating support; the insulating support is arranged on the bottom plate, and a bottom gap which is in communication with the inside of the insulating support is formed between the bottom surface of the insulating support and the bottom plate; an adapter is arranged around the bottom of the insulating support, the adapter has an adapter cavity which is in communication with the side gap and the bottom gap, the adapter is fixedly arranged on the bottom plate, and the insulating cover is fixedly arranged on the adapter. The application improves the arc extinguishing effect inside the relay and improves the upper limit of the use voltage of the relay product.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to a high-voltage relay. Background Technology

[0002] With the continuous improvement of market demand, the contactor industry is constantly innovating and upgrading its products. However, existing high-voltage relay products on the market still have many shortcomings and need further development and improvement. High-voltage relay products generally include main contact mechanisms and auxiliary contact mechanisms. The main contact mechanism includes active contacts and main stationary contacts, while the auxiliary contact mechanism includes auxiliary moving contacts and auxiliary stationary contacts.

[0003] Currently, high-voltage relays typically have arc-extinguishing functions inside their insulation covers, which can meet the needs of general high-voltage environments. However, with the continuous development of the relay industry, relays are becoming more compact and miniaturized. This results in a high concentration of components inside the insulation cover under high-voltage operating conditions where the space inside the cover is limited. Consequently, the current arc-extinguishing effect can no longer meet the needs of the relay, and high-temperature arcs can easily damage the internal structure of the relay.

[0004] Therefore, improving the arc-extinguishing effect of high-voltage relays in light of the aforementioned deficiencies is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a high-voltage relay that improves the arc extinguishing effect inside the relay and increases the upper limit of the high voltage for use in relay products.

[0006] To achieve the above objectives, this application provides a high-voltage relay, comprising:

[0007] An insulating cover is provided on the base plate and encloses the base plate to form a contact working space;

[0008] An insulating support is hollow inside and has a side opening on its side wall. The insulating support is located inside the insulating cover. There is a side gap between the side wall of the insulating support and the inner wall of the insulating cover, which communicates with the side opening and extends to the bottom of the insulating support. The insulating support is disposed on the base plate, and there is a bottom gap between the bottom of the insulating support and the base plate, which communicates with the interior of the insulating support.

[0009] An adapter is arranged around the bottom of the insulating support. The adapter has an adapter chamber communicating with the side gap and the bottom gap. The adapter is fixedly mounted on the base plate, and the insulating cover is fixedly mounted on the adapter.

[0010] Optionally, the adapter includes:

[0011] The lower folded edge is fixedly connected to the base plate;

[0012] The connecting edge is formed by bending the lower folded edge upwards, and the connecting edge is spaced apart from the insulating bracket;

[0013] The upper folded edge is formed by bending the connecting edge toward the insulating bracket. The upper folded edge extends toward the insulating bracket and is spaced apart from it to form an opening that connects the side gap and the transition chamber.

[0014] Optionally, the upper folded edge is fixedly connected to the bottom surface of the insulating cover.

[0015] Optionally, the insulating support has a first rib on the side wall with the side opening, the first rib protruding from the side wall of the insulating support, and the first rib abutting against the inner wall of the insulating cover to form the side gap.

[0016] Optionally, the bottom surface of the insulating bracket is provided with protruding feet, which abut against the base plate to form the bottom gap.

[0017] Optionally, the side opening is provided on one set of opposite sidewalls of the insulating bracket, and the other set of opposite sidewalls of the insulating bracket is provided with a second rib. The second rib abuts against the inner wall of the insulating cover to form the side gap, and the height of the second rib is higher than that of the first rib.

[0018] Optionally, the transfer chamber is annular and surrounds the bottom of the insulating support; the bottom surface of the insulating support forms a bottom gap with the base plate.

[0019] Optionally, the side gap formed by the insulating bracket and the insulating cover is annular, and the annular side gap is separated by a plurality of ribs provided on the insulating bracket.

[0020] Optionally, the width of the side gap is smaller than the width of the transition chamber.

[0021] Optionally, the top wall of the insulating cover presses against the upper surface of the insulating support to press the insulating support down and lock it onto the base plate.

[0022] The beneficial effect of this application is that a side gap is formed between the side walls of the insulating support and the insulating cover, a bottom gap is formed between the bottom surface of the insulating support and the base plate, and a transition chamber communicating with the side gap and the bottom gap is provided on the transition piece, so that the side gap forms a first arc-initiating path to the transition chamber. Figure 1 and Figure 3 (a) The bottom gap forms a second arc-starting path for arc-starting into the transition chamber. Figure 1 and Figure 3(b) thus creates arc-extinguishing space in both the side gap and the transition chamber, improving the arc-extinguishing effect of the relay, meeting the arc-extinguishing requirements of relays with high concentration of components inside the insulation cover, increasing the upper limit of high voltage for relay products, and preventing high-temperature arcs from damaging the internal structure of the relay. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a partial cross-sectional view of a high-voltage relay provided in an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the insulating support structure provided in the embodiments of this application;

[0026] Figure 3 This is a schematic diagram of the mating structure between the insulating bracket and the base plate provided in the embodiments of this application;

[0027] Figure 4 This is a partial cross-sectional view of the high-voltage relay provided in an embodiment of this application from another perspective;

[0028] Figure 5 This is a schematic diagram of the side gap arrangement structure provided in the embodiments of this application;

[0029] Figure 6 This is a schematic diagram of the transfer chamber arrangement structure provided in the embodiments of this application;

[0030] Figure 7 This is an exploded view of the insulating cover, insulating support, and base plate provided in the embodiments of this application;

[0031] Figure 8 This is a schematic diagram of the cooperation structure between the insulating cover and the magnetic circuit mechanism provided in the embodiments of this application;

[0032] Figure 9 This is a cross-sectional view showing the interaction between the insulating cover and the magnetic circuit mechanism provided in an embodiment of this application.

[0033] In the diagram: 1-Insulating cover; 2-Insulating bracket; 3-Adapter; 4-Side gap; 5-Bottom gap; 6-Base plate; 7-Main stationary contact; 8-Terminal; 9-Active contact; 10-Micro switch; 11-Follower arm; 12-Magnet bracket; 13-Magnet; 14-Wire; 15-U-shaped yoke; 16-Circuit board; 17-Coil bracket; 18-Coil; 19-Magnet; 20-Transmission rod;

[0034] 201 - Foot; 202 - Side opening; 203 - First rib; 204 - Second rib;

[0035] 301 - Adapter chamber; 302 - Lower folded edge; 303 - Connecting edge; 304 - Upper folded edge; 305 - Through port;

[0036] 1201 - Conductor segment; 1202 - Conductor groove. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] It should be noted that in this embodiment, the orientation or positional relationship indicated by terms such as "upper," "lower," "front," and "rear" is based on the orientation or positional relationship shown in the accompanying drawings. It is used only for the convenience of describing this application and for simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Please refer to Figures 1 to 9 This embodiment provides a high-voltage relay, which includes an insulating cover 1, an insulating support 2, and an adapter 3. The insulating cover 1 can be a ceramic cover made of ceramic material. The insulating cover 1 is disposed on a base plate 6 and cooperates with the base plate 6 to form the working space of the contacts. Specifically, the insulating cover 1 is provided with a mounting structure to accommodate two main stationary contacts 7. The mounting structure can be an assembly hole opened on the insulating cover 1, and the main stationary contacts 7 can be fixed in the assembly hole. The main stationary contacts 7 are arranged in pairs, and the insulating cover 1 is provided with at least one set of main stationary contacts 7. The main stationary contacts 7 have a contact end that extends into the interior of the insulating cover 1 and a lead-out end that leads out of the insulating cover 1. External circuits can be electrically connected to the main stationary contacts 7 through the lead-out end.

[0041] The insulating bracket 2 is fixedly installed inside the insulating cover 1. The insulating bracket 2 can be made of plastic and is hollow inside, with a side opening 202 on its side wall. Specifically, the side opening 202 is located on the opposite side wall of the insulating bracket 2, allowing the internal components of the insulating bracket 2 to be exposed through the side opening 202. It should be noted that the bottom of the side opening 202 does not reach the bottom of the insulating bracket 2, thus the side wall of the insulating bracket 2 has a certain height below the side opening 202.

[0042] Based on this, there is a side gap 4 between the side wall of the insulating support 2 located below the side opening 202 and the inner wall of the insulating cover 1, and the side gap 4 is connected to the side opening 202, so that the electric arc inside the insulating support 2 can be led to the side gap 4 through the side opening 202 for arc extinguishing.

[0043] Furthermore, the side gap 4 extends to the bottom of the insulating bracket 2, and the bottom of the insulating bracket 2 mates with the base plate 6. A bottom gap 5 exists between the bottom surface of the insulating bracket 2 and the upper surface of the base plate 6, and the bottom gap 5 communicates with the interior of the insulating bracket 2. Therefore, the electric arc inside the insulating bracket 2 can be guided to the bottom gap 5. Based on this, the adapter 3 surrounds the bottom of the insulating bracket 2, and the adapter 3 has an adapter chamber 301 communicating with the side gap 4 and the bottom gap 5. This allows the electric arc in the side gap 4 and the bottom gap 5 to enter the adapter chamber 301, where it can be extinguished.

[0044] Furthermore, the side gap 4 and the side opening 202 are connected, forming a channel for the lateral diffusion of the electric arc. When the contacts break and an arc is generated, high-temperature gas can enter the side gap 4 through the side opening 202, preventing the arc energy from accumulating near the contact. This design forces the arc to expand along a preset path, accelerating arc elongation and cooling. Similarly, the bottom gap 5 allows the high-pressure gas generated by the arc to be discharged downwards, preventing a sudden increase in gas pressure that could cause the arc to reignite. The transfer chamber 301 surrounds the bottom of the insulating support 2, connecting the side gap 4 and the bottom gap 5 to form an integrated gas buffer space. This space allows the laterally diffused arc gas and the vertically descending airflow to converge and dilute within the transfer chamber 301, preventing localized pressure concentration.

[0045] In summary, this application forms a side gap 4 between the side walls of the insulating support 2 and the insulating cover 1, a bottom gap 5 between the bottom surface of the insulating support 2 and the bottom plate 6, and provides a transition chamber 301 on the adapter 3 that communicates with the side gap 4 and the bottom gap 5, thereby forming a first arc-starting path from the side gap 4 to the transition chamber 301. Figure 1 and Figure 3 (a) The bottom gap 5 forms a second arc-starting path for arc-starting into the transition chamber 301. Figure 1 and Figure 3(b) thus forming arc-extinguishing spaces in both the side gap 4 and the transition chamber 301, improving the arc-extinguishing effect of the relay, meeting the arc-extinguishing requirements of the relay with high concentration of internal components in the insulation cover 1, increasing the upper limit of the high voltage for the use of the relay product, and avoiding damage to the internal structure of the relay by high-temperature arc.

[0046] The adapter 3 is fixedly mounted on the base plate 6, and the adapter chamber 301 is isolated from the outside air. That is, the adapter chamber 301 is only connected to the inside of the insulating cover 1 and the inside of the insulating support 2 through the side gap 4 and the bottom gap 5, so as to prevent external impurities from entering the adapter chamber 301, reducing the insulation strength of the gas medium in the adapter chamber 301, and increasing the risk of arc reignition.

[0047] The insulating cover 1 is fixedly mounted on the adapter 3. The adapter 3 serves as an intermediate support layer between the insulating cover 1 and the base plate 6, which evenly transmits mechanical loads (such as vibration and impact) to the base plate 6, preventing the insulating cover 1 from being directly deformed by force, significantly improving the overall resistance to deformation, and ensuring the geometric stability of the contact working space.

[0048] The adapter 3 includes a lower folded edge 302, a connecting edge 303, and an upper folded edge 304. The lower folded edge 302 can be welded to the base plate 6, providing a stable support base and evenly distributing the pressure of the insulating cover 1 and the adapter 3 to the base plate 6. The connecting edge 303 is formed by bending the lower folded edge 302 upwards, constituting a rigid support frame. Its height can be flexibly adapted to insulating supports 2 of different sizes, while providing longitudinal expansion space for the adapter chamber 301, ensuring that the volume of the adapter chamber 301 can be expanded and guaranteeing arc cooling efficiency.

[0049] The upper folded edge 304 is formed by bending the connecting edge 303 towards the insulating support 2, and the upper folded edge 304 extends toward the insulating support 2 and is spaced apart from it, thereby forming a through 305 that connects the side gap 4 and the transfer chamber 301, so that the high-temperature electric arc can be led into the transfer chamber 301.

[0050] Furthermore, the bottom surface of the insulating cover 1 can be fixedly connected to the upper folded edge 304 by welding tabs, thereby achieving stable fixation of the insulating cover 1.

[0051] After the adapter 3 is welded and fixed to the base plate 6 and the insulating cover 1 respectively, an annular adapter chamber 301 with a certain width and thickness can be formed between the adapter 3 and the insulating support 2.

[0052] The insulating bracket 2 has a side opening 202 and a first rib 203 on its side wall. The first rib 203 protrudes from the side wall of the insulating bracket 2, so that after the insulating cover 1 and the insulating bracket 2 are assembled, the first rib 203 abuts against the inner wall of the insulating cover 1 to form a side gap 4 between the inner wall of the insulating cover 1 and the outer wall of the insulating bracket 2.

[0053] The bottom surface of the insulating bracket 2 is provided with a protruding foot 201, which abuts against the base plate 6 to form a bottom gap 5.

[0054] The above indicates that the side opening 202 is located on a set of opposite side walls of the insulating support 2, and the other set of opposite side walls of the insulating support 2 is provided with a second rib 204. The second rib 204 abuts against the inner wall of the insulating cover 1 to form a side gap 4, so that the side gap 4 surrounds the outer periphery of the insulating support 2, and the annular side gap 4 can communicate with the annular transition chamber 301.

[0055] In addition, since the first rib 203 is located on the lower side of the insulating support 2, in order to ensure the contact stability between the insulating support 2 and the insulating cover 1, the height of the second rib 204 is higher than that of the first rib 203, so that the insulating support 2 abuts against the inner wall of the insulating cover 1 at different heights, thereby improving the stability of the insulating support 2 inside the insulating cover 1.

[0056] In some embodiments, the bottom surfaces of the insulating support 2 around the base plate 6 form a bottom gap 5. It can be seen that the annular bottom gap 5 and the annular side gap 4 can be adapted to the annular transition chamber 301, so that when an electric arc is generated, the electric arc can be guided to the transition chamber 301 around the insulating support 2.

[0057] The annular side gap 4 can be separated by ribs on multiple insulating supports 2, thereby forming multiple independent side gaps 4, blocking the continuous development of the electric arc along the annular path. Through physical isolation and structural optimization, the electrical performance and reliability of the high-voltage relay are significantly improved.

[0058] In some embodiments, the width of the side gap 4 is smaller than the width of the transition chamber 301, that is, the high-temperature arc can be constrained in the narrow slit of the side gap 4, and after entering the transition chamber 301, the heat dissipation volume increases, forming a gas expansion buffer layer, thereby attenuating the circuit energy and improving the arc extinguishing effect.

[0059] The top wall of the insulating cover 1 presses against the upper surface of the insulating bracket 2, thereby pressing down and locking the insulating bracket 2 onto the base plate 6, ensuring the stability of the insulating bracket 2. A magnetic steel bracket 12 is provided on the outer side of the insulating cover 1. A magnet 13 is clamped between the magnetic steel bracket 12 and the side wall of the insulating cover 1. The magnetic steel bracket 12 and the magnet 13 are distributed on both sides of the insulating cover 1, and the two magnetic steel brackets 12 extend towards the centerline of the insulating cover 1, forming a conductor segment 1201 away from the insulating cover 1 at the centerline position. A conductor groove 1202 is formed between the conductor segment 1201 and the insulating cover 1. The conductor 14 of the terminal 8 passes through the conductor groove 1202 and is led to the magnetic circuit mechanism on the lower side of the insulating cover 1, where it is electrically connected to the circuit board 16 of the magnetic circuit mechanism.

[0060] Specifically, the magnetic circuit mechanism is located on the lower side of the insulating cover 1. A housing is fitted around the magnetic circuit mechanism and the magnet support 12. The top wall of the housing corresponds to the top wall of the insulating cover 1, and the side wall of the housing corresponds to the magnet support 12 and the magnetic circuit mechanism. A base is provided at the bottom of the housing. Under the limiting action of the housing and the base, the insulating cover 1 and the magnetic circuit mechanism can be stably limited in the cavity structure. Specifically, the cooperation between the top wall of the housing and the base can limit the insulating cover 1 and the magnetic circuit mechanism in the vertical direction, and the side wall of the housing can limit the insulating cover 1 and the magnetic circuit mechanism in the horizontal direction, thereby ensuring the stability of the insulating cover 1, the magnetic circuit mechanism and other components.

[0061] Furthermore, the magnetic circuit mechanism includes a stator assembly and a mover assembly extending into the insulating cover 1. The mover assembly is connected to an active contact 9 and a follower arm 11. Both the active contact 9 and the follower arm 11 are located within the insulating support 2. The mover assembly moves under the drive of the stator assembly, thereby driving the active contact 9 and the follower arm 11 to move, thereby realizing the electrical conduction of the main stationary contact 7. The follower arm 11 can correspond to the micro switch 10, so that the micro switch 10 can electrically connect the two terminals 8.

[0062] The moving part assembly can be a transmission device including a magnet 19, and the stator assembly can be a drive device including a coil 18. The coil 18 generates a magnetic field when energized, and the magnet 19 can drive the transmission device to move under the action of the magnetic field, thereby causing the active contact 9 and the follower arm 11 to move.

[0063] Specifically, the stator assembly includes a U-shaped yoke 15, a coil support 17, and a coil 18. The U-shaped yoke 15 is fixedly mounted on the base, and the coil support 17 is located within the U-shaped structure of the U-shaped yoke 15. The coil support 17 has an axial cavity in the middle for the movement of the mover assembly. The coil 18 is sleeved on the coil support 17 around the axial cavity and is used to generate a magnetic field that drives the magnet 19 to move axially.

[0064] The moving part assembly includes a magnet 19, a transmission rod 20, and a lifting bracket. The magnet 19 is located in the axial cavity. One end of the transmission rod 20 is connected to the magnet 19, and the other end extends through the base plate 6 into the insulating cover 1 and the insulating bracket 2. A lifting bracket is provided at the end. The active contact 9 and the follower arm 11 are provided on the lifting bracket. The magnet 19 moves towards the insulating cover 1 in the magnetic field generated by the coil 18, thereby driving the transmission rod 20 to move towards the main stationary contact 7 (micro switch 10). In turn, the transmission rod 20 pushes the active contact 9 (follower arm 11) on the lifting bracket to move towards the main stationary contact 7 (micro switch 10), thereby realizing the electrical conduction of the main stationary contact 7 and the electrical conduction of the terminal 8.

[0065] Considering that the active contact 9 should separate from the main stationary contact 7 after the magnetic field generated by the coil 18 disappears, an elastic element can be sleeved around the outer periphery of the transmission rod 20. The elastic force of the elastic element can be used to reset the transmission rod 20 and the magnet 19, so that the active contact 9 and the follower arm 11 are ready for the next action.

[0066] The circuit board 16 can be set inside the U-shaped yoke 15 to utilize the internal space of the U-shaped yoke 15 and avoid the circuit board 16 occupying extra space. The coil 18 and the wire 14 can be led out of the housing through the circuit board 16 to realize the connection between the coil 18 and the wire 14 and the external circuit.

[0067] In some embodiments, the height of the magnet 13 is lower than the upper surface of the magnet bracket 12, and the height of the magnet bracket 12 is higher than the upper surface of the insulating cover 1, thereby forming a glue groove. During assembly, after wiring the terminal 8, glue is applied to the terminal 8 and the upper surface of the insulating cover 1. After glue application, the housing is installed. The glue covers the upper surface of the insulating cover 1 under the pressure of the housing, achieving effective insulation between the leads of the main stationary contact 7, as well as effective insulation between the terminal 8 and between the terminal 8 and the leads of the main stationary contact 7.

[0068] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0069] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A high-voltage relay, characterized in that, include: An insulating cover (1) is provided on the base plate (6) and forms a contact working space with the base plate (6); An insulating support (2) is hollow inside and has a side opening (202) on its side wall. The insulating support (2) is located inside the insulating cover (1). There is a side gap (4) between the side wall of the insulating support (2) and the inner wall of the insulating cover (1) that communicates with the side opening (202), and the side gap (4) extends to the bottom of the insulating support (2). The insulating support (2) is disposed on the base plate (6), and there is a bottom gap (5) between the bottom surface of the insulating support (2) and the base plate (6) that communicates with the interior of the insulating support (2). The adapter (3) surrounds the bottom of the insulating bracket (2). The adapter (3) has an adapter chamber (301) communicating with the side gap (4) and the bottom gap (5). The adapter (3) is fixedly mounted on the base plate (6). The insulating cover (1) is fixedly mounted on the adapter (3).

2. The high-voltage relay according to claim 1, characterized in that, The adapter (3) includes: The lower folded edge (302) is fixedly connected to the base plate (6); The connecting edge (303) is formed by bending the lower folded edge (302) upwards, and the connecting edge (303) is spaced apart from the insulating bracket (2); The upper folded edge (304) is formed by bending the connecting edge (303) toward the insulating bracket (2). The upper folded edge (304) extends toward the insulating bracket (2) and is spaced apart from it to form an opening (305) connecting the side gap (4) and the transition chamber (301).

3. The high-voltage relay according to claim 2, characterized in that, The upper folded edge (304) is fixedly connected to the bottom surface of the insulating cover (1).

4. The high-voltage relay according to claim 1, characterized in that, The insulating bracket (2) has a first rib (203) on the side wall with the side opening (202). The first rib (203) protrudes from the side wall of the insulating bracket (2) and abuts against the inner wall of the insulating cover (1) to form the side gap (4).

5. The high-voltage relay according to claim 1, characterized in that, The bottom surface of the insulating bracket (2) is provided with a protruding foot (201), and the foot (201) abuts against the base plate (6) to form the bottom gap (5).

6. The high-voltage relay according to claim 4, characterized in that, The side opening (202) is provided on one set of opposite sidewalls of the insulating bracket (2), and the other set of opposite sidewalls of the insulating bracket (2) is provided with a second rib (204). The second rib (204) abuts against the inner wall of the insulating cover (1) to form the side gap (4), and the height of the second rib (204) is higher than that of the first rib (203).

7. The high-voltage relay according to claim 1, characterized in that, The transfer chamber (301) is annular and is arranged around the bottom of the insulating support (2); the bottom surface of the insulating support (2) and the bottom plate (6) form a bottom gap (5).

8. The high-voltage relay according to claim 1, characterized in that, The side gap (4) formed by the enclosure of the insulating bracket (2) and the insulating cover (1) is annular, and the annular side gap (4) is separated by a plurality of ribs provided on the insulating bracket (2).

9. The high-voltage relay according to claim 1, characterized in that, The width of the side gap (4) is smaller than the width of the transition chamber (301).

10. The high-voltage relay according to claim 1, characterized in that, The top wall of the insulating cover (1) is pressed against the upper surface of the insulating bracket (2) to press down and lock the insulating bracket (2) onto the base plate (6).

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