JP7702080B2 - Switchgear - Google Patents

Description

An embodiment of the present invention relates to a switchgear.

Conventionally, when connecting solid insulated devices used in solid insulated switchgear and the like, a connection structure is known in which a convex conductor is inserted into a concave main circuit on one side.

JP 2019-83142 A

The fixed main circuits housed in conventional solid insulated switchgear use a connection structure in which one concave conductor is inserted into the other convex conductor. As a result, when disassembling each fixed main circuit inside the housing, it can only be removed in one direction.

One example of the problem that this invention solves is to provide a connection structure that allows the fixed main circuit inside the housing to be removed more easily than before.

The switchgear according to the embodiment has a housing and a connection structure. The connection structure has a plurality of fixed main circuits housed in the housing, and a movable main circuit located between the plurality of fixed main circuits and movable in the axial direction of the fixed main circuits relative to any one of the plurality of fixed main circuits.

FIG. 1 is a cross-sectional view of a switchgear according to the present embodiment. FIG. 2 is a cross-sectional view of the movable interface connection structure of the first embodiment. FIG. 3 is a cross-sectional view of the movable interface connection structure of the second embodiment. FIG. 4 is a cross-sectional view of a movable interface connection structure according to the third embodiment. FIG. 5 is a flowchart showing a flow until the fixed main circuit is removed in the first embodiment. FIG. 6 is a flow chart showing a flow up to removal of the fixed main circuit in the second and third embodiments.

(Embodiment)
Hereinafter, a switchgear according to an embodiment will be described with reference to the drawings. The configuration of the embodiment described below and the actions and results (effects) brought about by the configuration are merely examples and are not limited to the following description.

Furthermore, the multiple embodiments disclosed below include similar components. Therefore, in the following, the similar components are given the same reference numerals, and duplicate explanations are omitted. Note that in this specification, ordinal numbers are used only to distinguish between parts and components, and do not indicate order or priority.

First Embodiment
1 is a cross-sectional view of a switchgear 1 according to the present embodiment. The switchgear 1 according to the present embodiment is a solid insulated switchgear. However, the switchgear 1 is not limited to this.

As shown in FIG. 1, the switchgear 1 includes a circuit breaker 11 housed in a housing 10, a disconnector 12, a grounding device 13, a main circuit 14, and a movable interface connection structure 2.

The housing 10 is made of metal, for example, and is configured in a rectangular box shape. The circuit breaker 11 is a device for opening and closing an electric circuit. The disconnector 12 is a device for opening and closing an electric circuit only when no current is flowing through the electric circuit. The grounding device 13 is a device for connecting to an object to ground the object.

The main circuit 14 passes through the circuit breaker 11, the disconnector 12, and the grounding device 13.

In each of the following figures, for convenience, two mutually perpendicular directions are defined. The X direction is a direction along the radial direction of the central axis Ax of the movable interface connection structure 2, and may also be referred to as the left-right direction. The Y direction is an axial direction along the central axis Ax of the movable interface connection structure 2, and may also be referred to as the up-down direction.

Figure 2 is a cross-sectional view of the movable interface connection structure 2 of the first embodiment. The left side shows the positional relationship when connected, and the right side shows the positional relationship when removed. As shown in Figure 2, the movable interface connection structure 2 has two fixed main circuits 20, a movable main circuit 21, a first interface rubber 22, and a second interface rubber 23. The first interface rubber 22 is an example of a first elastic member, and the second interface rubber 23 is an example of a second elastic member.

The fixed main circuit 20 has an upper fixed main circuit 20a located above (+Y direction) the fixed main circuit 20, and a lower fixed main circuit 20b located above (-Y direction). The upper fixed main circuit 20a is an example of a first fixed main circuit, and the lower fixed main circuit 20b is an example of a second fixed main circuit.

The upper fixed main circuit 20a has a conductor 20a2 covered by an upper fixed main circuit insulating part 20a1. The upper fixed main circuit insulating part 20a1 is made of an insulating synthetic resin material such as epoxy resin. The upper fixed main circuit insulating part 20a1 is an example of a first insulating part.

The conductor 20a2 has a cylindrical shape extending in the axial direction. The conductor 20a2 is made of a highly conductive metal material such as oxygen-free copper. The lower end surface 20a3, which is the end surface of the conductor 20a2 in the downward direction (-Y direction), is exposed to the outside from the upper fixed main circuit insulating part 20a1. The lower end surface 20a3 is electrically connected by contacting the movable main circuit 21. The lower end surface 20a3 is an example of a first surface.

The lower fixed main circuit 20b has a conductor 20b2 covered by a lower fixed main circuit insulating part 20b1. The lower fixed main circuit insulating part 20b1 is made of an insulating synthetic resin material such as epoxy resin.

The lower fixed main circuit insulating part 20b1 covers the conductor 20b2 except for a part of the narrowed portion 20b3 of the conductor 20b2. The lower fixed main circuit insulating part 20b1 is an example of a second insulating part.

The conductor 20b2 extends in the axial direction and has a cylindrical shape whose diameter narrows upward from the constricted portion 20b3 (in the +Y direction). The conductor 20b2 is made of a highly conductive metal material such as oxygen-free copper. The constricted portion 20b3 is an example of the first portion.

The upper end surface 20b4, which is the end surface of the conductor 20b2 in the upward direction (+Y direction), and the side surface 20b5, which is the side surface of the conductor 20b2, are exposed to the outside from the lower fixed main circuit insulating part 20b1. The side surface 20b5 is electrically connected by contacting the movable main circuit 21. The side surface 20b5 is an example of a fourth surface.

The movable main circuit 21 is located between the upper fixed main circuit 20a and the lower fixed main circuit 20b, and is arranged to be movable in the axial direction relative to the upper fixed main circuit 20a and the lower fixed main circuit 20b. The movable main circuit 21 has a conductor 21a2 covered by a movable main circuit insulating part 21a1.

The movable main circuit insulating part 21a1 is made of an insulating synthetic resin material such as epoxy resin. The movable main circuit insulating part 21a1 is an example of a third insulating part.

The conductor 21a2 is made of a highly conductive metal material such as oxygen-free copper. The conductor 21a2 has a recess 21a3 recessed in the upward direction (+Y direction), a protrusion 21a4 protruding in the downward direction (-Y direction), and an upper end surface 21a5 which is the end surface of the conductor 21a2 in the upward direction (+Y direction). The upper end surface 21a5 is an example of a second surface.

The recess 21a3 has an inner side surface 21a31, which is the inner side surface of the recess 21a3. The inner side surface 21a31 is an example of a third surface.

The movable main circuit 21 is electrically connected by abutting the lower end surface 20a3 of the upper fixed main circuit 20a with the upper end surface 21a5 of the movable main circuit 21, and fitting the lower fixed main circuit 20b into the recess 21a3 of the movable main circuit 21. In other words, the movable interface connection structure 2 is electrically connected by the lower end surface 20a3 of the conductor 20a2 of the upper fixed main circuit 20a and the upper end surface 21a5 of the conductor 21a2 of the movable main circuit 21 being in planar contact with each other, and the inner side surface 21a31 of the recess 21a3 of the movable main circuit 21 and the side surface 20b5 of the conductor 20b2 of the lower fixed main circuit 20b being in cylindrical side contact with each other.

When the movable main circuit 21 is electrically connected to the upper fixed main circuit 20a and the lower fixed main circuit 20b, an air gap 24 is formed between the recess 21a3 of the conductor 21a2 and the upper end surface 20b4 of the conductor 20b2. The movable main circuit 21 can move across the air gap 24 that is formed.

The movable main circuit insulating part 21a1 covers the conductor 21a2 except for the recess 21a3 of the conductor 21a2 and the upper end surface 21a5.

The first interface rubber 22 is located between the upper fixed main circuit 20a and the movable main circuit 21, and is attached to the movable main circuit insulating part 21a1. The first interface rubber 22 is cylindrical and does not contact the lower end surface 20a3 of the conductor 20a2 or the upper end surface 21a5 of the conductor 21a2.

The second interface rubber 23 is located between the lower fixed main circuit 20b and the movable main circuit 21, and is attached to the movable main circuit insulating part 21a1. The second interface rubber 23 is cylindrical and does not contact the side surface 20b5 of the conductor 20b2.

The first interface rubber 22 and the second interface rubber 23 seal the gaps that form between the upper fixed main circuit 20a, the lower fixed main circuit 20b, and the movable main circuit 21, and suppress discharge toward the outside of the upper fixed main circuit 20a, the lower fixed main circuit 20b, and the movable main circuit 21 when current is applied.

As described above, the switch gear 1 comprises a housing 10, an upper fixed main circuit 20a and a lower fixed main circuit 20b housed within the housing 10, and a movable interface connection structure 2 having a movable main circuit 21 located between the upper fixed main circuit 20a and the lower fixed main circuit 20b and arranged to be movable in the axial direction of the fixed main circuit 20 relative to the upper fixed main circuit 20a and the lower fixed main circuit 20b.

When removing the upper fixed main circuit 20a or the lower fixed main circuit 20b housed in the housing 10 of the switchgear 1 of this embodiment, the movable main circuit 21, which is located between the upper fixed main circuit 20a and the lower fixed main circuit 20b and is movable relative to the upper fixed main circuit 20a or the lower fixed main circuit 20b, is moved, for example, in the axial direction to create a gap between the upper fixed main circuit 20a and the movable main circuit 21. This makes it possible to easily remove the upper fixed main circuit 20a or the lower fixed main circuit 20b by sliding the upper fixed main circuit 20a or the lower fixed main circuit 20b in the radial direction.

In this embodiment, the fixed main circuit 20 has an upper fixed main circuit 20a covered by an upper fixed main circuit insulating part 20a1, and a lower fixed main circuit 20b covered by a lower fixed main circuit insulating part 20b1. The movable main circuit 21 is covered by a movable main circuit insulating part 21a1.

The movable interface connection structure 2 has a first interface rubber 22 provided between the upper fixed main circuit insulation part 20a1 and the movable main circuit insulation part 21a1, and a second interface rubber 23 provided between the lower fixed main circuit insulation part 20b1 and the movable main circuit insulation part 21a1.

In addition, the movable interface connection structure 2 is electrically conductive when the lower end surface 20a3 of the conductor 20a2 of the upper fixed main circuit 20a and the upper end surface 21a5 of the conductor 21a2 of the movable main circuit 21 are in planar contact with each other, and the inner side surface 21a31 of the recess 21a3 of the movable main circuit 21 and the side surface 20b5 of the conductor 20b2 of the lower fixed main circuit 20b are in cylindrical side contact with each other.

In addition, the movable main circuit 21 can move in conjunction with the deformation of the first interface rubber 22 and the second interface rubber 23.

When removing the upper fixed main circuit 20a or the lower fixed main circuit 20b in this embodiment, the movable main circuit 21 located between the upper fixed main circuit 20a and the lower fixed main circuit 20b is moved in the axial direction. As the movable main circuit 21 moves, the first interface rubber 22 or the second interface rubber 23 deforms in conjunction with the movement of the movable main circuit 21. For example, when the movable main circuit 21 is moved downward (in the -Y direction), the second interface rubber 23 is compressed, creating a gap between the upper fixed main circuit 20a and the first interface rubber 22. Then, the upper fixed main circuit 20a can be removed radially outward.

This makes it possible to selectively remove either the upper fixed main circuit 20a or the lower fixed main circuit 20b. Therefore, it becomes possible to remove the fixed main circuit 20 inside the housing 10 of the switchgear 1 even more easily than before. In addition, when assembling the switchgear 1, the dimensions can be adjusted in the axial direction by adjusting the position of the movable main circuit 21. In the radial direction, the current-carrying contact surface is in flat contact, so the dimensions can be adjusted by moving the current-carrying contact surface.

In addition, in this embodiment, the conductor 21a2 of the movable main circuit 21 has a protrusion 21a4 protruding from the end in the downward direction (-Y direction). The diameter of the conductor 20b2 of the lower fixed main circuit 20b narrows from the constricted portion 20b3, and a part of the conductor 20b2 of the lower fixed main circuit 20b is exposed from the lower fixed main circuit insulating portion 20b1.

When discharge occurs in the fixed main circuit 20 and the movable main circuit 21, it is difficult to insulate the inside of the second interface rubber 23. As a solution to this problem, a protrusion 21a4 is provided that protrudes from the end of the conductor 21a2 of the movable main circuit 21 in the downward direction (-Y direction), and the diameter of the conductor 20b2 of the lower fixed main circuit 20b becomes narrower from the constricted portion 20b3.

As a result, the protrusion 21a4 and the shape in which the diameter narrows from the constricted portion 20b3 act as an electric field mitigation shield. Therefore, the electric field generated inside the second interface rubber 23 is mitigated. Furthermore, with this configuration, it is possible to reduce the overall size compared to conventional switch gears.

Second Embodiment
Fig. 3 is a cross-sectional view of a movable interface connection structure 2A of the second embodiment. The left side shows the positional relationship when connected, and the right side shows the positional relationship when removed. The movable interface connection structure 2A of the second embodiment shown in Fig. 3 has a similar configuration to the movable interface connection structure 2 of the first embodiment. Therefore, the second embodiment also provides an effect based on the same configuration as the first embodiment.

However, in the second embodiment, as shown in FIG. 3, unlike the configuration of the first embodiment, the second interface rubber 23 is not provided. Instead, an air space 25 and an O-ring 26 are provided.

As shown in FIG. 3, the conductor 20a2 of the upper fixed main circuit 20a has a recess 20a4 that is recessed in the upward direction (+Y direction).

The recess 20a4 has a bottom surface 20a41, which is the bottom surface of the recess 20a4, and an inner side surface 20a42, which is the inner side surface of the recess 20a4. The inner side surface 20a42 is an example of a fifth surface.

The conductor 21a2 of the movable main circuit 21 has a protrusion 21a6 that protrudes upward (in the +Y direction) from the upper end surface 21a5. The protrusion 21a6 has an outer side surface 21a61, which is the outer side surface of the protrusion 21a6. The outer side surface 21a61 is electrically connected by contacting the inner side surface 20a42 of the recess 20a4 of the upper fixed main circuit 20a. The outer side surface 21a61 is an example of a sixth surface.

The cross-sectional shape of the movable main circuit insulating part 21a1 is roughly V-shaped in the downward direction (-Y direction) due to the protrusion 21a11 that protrudes from the end in the downward direction (-Y direction).

The lower fixed main circuit insulating part 20b1 has a recess 20b11 recessed downward (-Y direction) so that the protrusion 21a11 of the movable main circuit insulating part 21a1 can fit into it.

The axial length of the air gap 24 is longer than the axial length of the protruding portion 21a6 of the movable main circuit 21. In other words, the protruding portion 21a6 of the movable main circuit 21 protrudes in the axial direction shorter than the axial length of the air gap 24.

The air space 25 is provided between the movable main circuit insulating part 21a1 of the movable main circuit 21 and the lower fixed main circuit insulating part 20b1, and the movable main circuit 21 can move within the air space 25. The cross-sectional shape of the air space 25 forms a substantially V-shape from the center in the radial direction. The air space 25 is an example of a space.

The axial length of the air space 25 is set to be equal to or greater than the axial length of the air gap 24.

The O-ring 26 is used to fix the movable main circuit 21 to the upper fixed main circuit 20a when current is applied. The O-ring 26 prevents dust and foreign matter from entering the air space 25, ensuring long-term insulation performance.

The O-ring 26 is provided to close the gap 25a between the movable main circuit insulating part 21a1 and the lower fixed main circuit insulating part 20b1. In other words, the movable main circuit insulating part 21a1 is connected to the lower fixed main circuit insulating part 20b1 in the vertical direction via the O-ring 26.

The movable interface connection structure 2A electrically connects the protrusion 21a6 of the movable main circuit 21 with the recess 20a4 of the upper fixed main circuit 20a, and the recess 21a3 of the movable main circuit 21 with the lower fixed main circuit 20b. In other words, the inner side surface 20a42 of the recess 20a4 and the outer side surface 21a61 of the protrusion 21a6 that can move within the air space 25 are in cylindrical side contact with each other, and the inner side surface 21a31 of the conductor 21a2 of the movable main circuit 21 and the side surface 20b5 of the conductor 20b2 of the lower fixed main circuit 20b are in cylindrical side contact with each other, thereby conducting electricity.

When the movable interface connection structure 2A is in contact with the cylindrical side surface, the protrusion 21a6 of the movable main circuit 21 protrudes in the axial direction shorter than the axial length of the air gap 24. Furthermore, the axial length of the air space 25 is set to be equal to or longer than the axial length of the air gap 24. This allows the protrusion 21a6 of the movable main circuit 21 to be removed from the recess 20a4 of the upper fixed main circuit 20a.

As described above, the fixed main circuit 20 has an upper fixed main circuit 20a covered by an upper fixed main circuit insulating part 20a1, and a lower fixed main circuit 20b covered by a lower fixed main circuit insulating part 20b1. The conductor 20a2 of the upper fixed main circuit 20a has a recess 20a4 recessed in the upward direction (+Y direction). The movable main circuit 21a covered by the movable main circuit insulating part 21a1 has a protrusion 21a6 protruding in the upward direction (+Y direction).

The movable interface connection structure 2A has a first interface rubber 22 provided between the upper fixed main circuit insulation part 20a1 and the movable main circuit insulation part 21a1, and an air space 25 provided between the lower fixed main circuit insulation part 20b1 and the movable main circuit insulation part 21a1.

In addition, the movable interface connection structure 2A is electrically conductive when the inner side surface 20a42 of the recess 20a4 and the outer side surface 21a61 of the protrusion 21a6 that can move within the air space 25 come into cylindrical side contact with each other, and the inner side surface 21a31 of the conductor 21a2 of the movable main circuit 21 and the side surface 20b5 of the conductor 20b2 of the lower fixed main circuit 20b come into cylindrical side contact with each other.

When removing the upper fixed main circuit 20a or the lower fixed main circuit 20b in this embodiment, the movable main circuit 21 located between the upper fixed main circuit 20a and the lower fixed main circuit 20b is moved in the axial direction. The movable main circuit 21 moves in the air space 25 provided between the lower fixed main circuit insulating part 20b1 and the movable main circuit insulating part 21a1, creating a gap between the upper fixed main circuit 20a or the lower fixed main circuit 20b and the movable main circuit 21. Then, the upper fixed main circuit 20a or the lower fixed main circuit 20b can be removed radially outward.

As a result, by moving the movable main circuit 21 into the air space 25, it is possible to selectively remove either the upper fixed main circuit 20a or the lower fixed main circuit 20b. Therefore, it is possible to remove the fixed main circuit 20 inside the housing 10 of the switchgear 1 more easily than before.

In addition, in this embodiment, the conductor 21a2 of the movable main circuit 21 has a protrusion 21a4 protruding from the end in the downward direction (-Y direction). The movable main circuit insulating part 21a1 has a protrusion 21a11 that protrudes downward (-Y direction) to cover the protrusion 21a4. The lower fixed main circuit insulating part 20b1 has a recess 20b11 into which the protrusion 21a11 fits.

When discharge occurs in the fixed main circuit 20 and the movable main circuit 21, it is difficult to insulate the air space 25. As a solution to this problem, a protrusion 21a11 is provided that protrudes from the end of the movable main circuit insulating part 21a1 of the movable main circuit 21 in the downward direction (-Y direction).

As a result, the cross-sectional shape of the air space 25 forms a roughly V-shape from the center toward the radial direction. On the other hand, the electric field direction in the air space 25 is toward the outside in the radial direction, so the protrusion 21a11 acts as an electric field mitigation shield against the electric field direction.

Therefore, when a discharge occurs in the air space 25, the discharge is directed along the air space 25 toward the outside of the lower fixed main circuit 20b or the movable main circuit 21. In other words, the protrusion 21a11 increases the creepage distance during discharge, improving the insulation strength.

Third Embodiment
Fig. 4 is a cross-sectional view of a movable interface connection structure 2B of the third embodiment. The left side shows the positional relationship when connected, and the right side shows the positional relationship when removed. The movable interface connection structure 2B of the third embodiment shown in Fig. 4 has a similar configuration to the movable interface connection structures 2 and 2A of the first and second embodiments. Therefore, the third embodiment also provides the same effects based on the same configurations as the first and second embodiments.

However, in the third embodiment, as shown in FIG. 4, a ground shield 27 is embedded in the movable main circuit insulating part 21a1.

The ground shield 27 is a metal piece made of a highly conductive metal material. The shape of the ground shield 27 is an L shape that extends upward (in the +Y direction), bends midway, and extends radially outward.

The ground shield 27 has an external terminal 27a. Note that the external terminal 27a is an example of one end.

The external terminal 27a is exposed to the outside from the movable main circuit insulating part 21a1 of the ground shield 27 in order to set the ground shield 27 itself to ground potential. When a discharge occurs in the air space 25, the external terminal 27a becomes the end of the discharge. Therefore, it is desirable to locate the external terminal 27a as far away from the starting point of the discharge as possible in order to ensure a creepage distance during discharge.

As described above, the movable main circuit insulation part 21a1 has a ground shield 27. The external terminal 27a of the ground shield 27 is exposed to the outside.

When a discharge occurs in the fixed main circuit 20 and the movable main circuit 21, the ground shield 27 prevents the electric field from penetrating into the area radially outside the ground shield 27.

This reduces the electric field in the gap 25a outside the air space 25. In addition, by reducing the electric field in the gap 25a, it is possible to further reduce the overall size compared to conventional switchgears.

The configuration of the movable interface connection structure is not limited to the configuration of the movable interface connection structures 2, 2A, and 2B. For example, in the above embodiment, the lower fixed main circuit 20b is located on the outside and the movable main circuit 21 is located on the inside, and the conductor 20b2 of the lower fixed main circuit 20b is fitted into the recess 21a3 of the movable main circuit 21, but this relationship may be reversed.

In addition, in the above embodiment, the ground shield 27 is embedded in the movable main circuit insulating part 21a1, but the ground shield 27 may be embedded in the fixed main circuit 20, for example.

Figure 5 is a flowchart showing the process for removing the fixed main circuit 20 in the first embodiment. Figure 6 is a flowchart showing the process for removing the fixed main circuit 20 in the second and third embodiments.

As shown in Figures 5 and 6, in step S1, the movable main circuit 21 is moved downward (in the -Y direction) by the air gap 24.

In the first embodiment, in step S2A, the second interface rubber 23 is compressed by the amount of movement of the movable main circuit 21. In the second and third embodiments, in step S2B, the movable main circuit 21 moves within the air space 25.

In step S3, in the case of the first embodiment, a gap is generated between the upper fixed main circuit 20a and the first interface rubber 22 due to the compression of the second interface rubber 23 in step S2A. In the case of the second and third embodiments, a gap is generated between the upper fixed main circuit 20a and the first interface rubber 22 due to the movement of the movable main circuit 21 in the air space 25 in step S2B.

In step S4, the upper fixed main circuit 20a can be released from the state of step S3 and slid radially, allowing the upper fixed main circuit 20a to be easily removed.

In addition, by releasing the lower fixed main circuit 20b in the step S3 state and sliding it radially, the lower fixed main circuit 20b can be easily removed.

When assembling the fixed main circuit 20, first adjust the axial position of the movable main circuit 21 within a range that ensures sufficient current carrying capacity.

Furthermore, in the case of the first embodiment, the lower end surface 20a3 of the upper fixed main circuit 20a, which has a planar shape, and the upper end surface 21a5 of the movable main circuit 21 are adjusted by sliding them in the radial direction. Then, the movable main circuit 21 is attached to the adjusted position.

Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. These embodiments and their modifications are within the scope of the invention and its equivalents as set forth in the claims, as well as the scope and gist of the invention.

1 Switch gear 10 Housing 14 Main circuit 2, 2A, 2B Movable interface connection structure 20 Fixed main circuit 20a Upper fixed main circuit (first fixed main circuit)
20a1 Upper fixed main circuit insulating part (first insulating part)
20a2 Conductor 20a3 Lower end surface (first surface)
20a4 Recess 20a42 Inner side surface (fifth surface)
20b Lower fixed main circuit (second fixed main circuit)
20b1 Lower fixed main circuit insulation part (second insulation part)
20b11: Recess 20b2: Conductor 20b3: Narrowed portion (first portion)
20b5 Side (fourth surface)
21 Movable main circuit 21a1 Movable main circuit insulation section (third insulation section)
21a11 Protrusion 21a2 Conductor 21a3 Recess 21a31 Inner side surface (third surface)
21a4 Protrusion 21a5 Upper end surface (second surface)
21a6 Convex portion 21a61 Outer side surface (sixth surface)
22 First interface rubber (first elastic member)
23 Second interface rubber (second elastic member)
25 Air space (space)
25a Air gap 27 Ground shield 27a External terminal (one end)

Claims (6)

A housing and
a connection structure including: a plurality of fixed main circuits housed in the housing; and a movable main circuit located between the plurality of fixed main circuits and movable in an axial direction of the fixed main circuit relative to any one of the plurality of fixed main circuits;
Equipped with
The fixed main circuit includes a first fixed main circuit and a second fixed main circuit,
a first surface of the conductor of the first fixed main circuit and a second surface of the conductor of the movable main circuit are in planar contact with each other, a third surface of the conductor of the movable main circuit along the axial direction and a fourth surface of the conductor of the second fixed main circuit along the axial direction are in cylindrical side contact with each other,
the first fixed main circuit is covered with a first insulating portion,
the second fixed main circuit is covered with a second insulating portion,
The movable main circuit is covered with a third insulating portion,
the connection structure includes a first elastic member provided between the first insulating portion and the third insulating portion, and a second elastic member provided between the second insulating portion and the third insulating portion,
The movable main circuit is movable in the axial direction in conjunction with deformation of the first elastic member or the second elastic member.
Switchgear. a conductor of the movable main circuit having a projection protruding from an end portion in the axial direction;
a diameter of the conductor of the second fixed main circuit narrows from the first portion, and a part of the conductor of the second fixed main circuit is exposed from the second insulating portion;
The switchgear according to claim 1. A conductor of the first fixed main circuit is provided with a recess recessed in the axial direction,
A conductor of the movable main circuit is provided with a protrusion protruding in the axial direction,
a third surface of the conductor of the movable main circuit along the axial direction and a fourth surface of the conductor of the second fixed main circuit along the axial direction are in cylindrical side contact with each other, and a fifth surface of the recess along the axial direction and a sixth surface of the protrusion along the axial direction are in cylindrical side contact with each other.
The switchgear according to claim 1. the connection structure has a space provided between the second insulating portion and the third insulating portion,
The movable main circuit is movable within the space.
The switchgear according to claim 3. a conductor of the movable main circuit having a projection protruding from an end portion in the axial direction;
the third insulating portion has a protruding portion protruding in the axial direction so as to cover the protrusion,
the second insulating portion has a recess into which the protrusion fits,
a diameter of the conductor of the second fixed main circuit narrows from the first portion, and a part of the conductor of the second fixed main circuit is exposed from the second insulating portion;
The switchgear according to claim 4. the third insulating portion includes a ground shield;
One end of the ground shield is exposed to the outside.
The switchgear according to claim 5.

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