Switch gear

Abstract

To provide a connection structure that enables fixed main circuits present in an enclosure to be removed more easily than before.SOLUTION: A switch gear according to an embodiment has an enclosure and a connection structure. The connection structure has: a plurality of fixed main circuits enclosed in the enclosure; and a movable main circuit located between the plurality of fixed main circuits and provided to be movable relative to any of the plurality of fixed main circuits in an axial direction of the fixed main circuit.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] Embodiments of the present invention relate to a switch gear.

Background Art

[0002] Conventionally, in the connection of solid insulation equipment used in solid insulation switch gears and the like, a connection structure is known in which a convex conductor on the other side is inserted into a concave main circuit on one side.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The fixed main circuit housed in the conventional solid insulation switch gear adopts a connection structure in which a convex conductor on the other side is inserted into a concave conductor on one side. Therefore, when disassembling each fixed main circuit in the housing, it can be removed only in one direction.

[0005] An example of the problem to be solved by the present invention is to provide a connection structure that allows the fixed main circuit in the housing to be removed more easily than before.

Means for Solving the Problems

[0006] The switch gear according to the embodiment includes a housing and a connection structure. The connection structure includes a plurality of fixed main circuits housed in the housing, and a movable main circuit located between the plurality of fixed main circuits and provided so as to be movable in the axial direction of the fixed main circuit with respect to any one of the plurality of fixed main circuits.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

BEST MODE FOR CARRYING OUT THE INVENTION

[0008] (Embodiment) Hereinafter, the switch gear according to the embodiment will be described with reference to the drawings. The configurations of the embodiments described below, as well as the actions and results (effects) brought about by the configurations, are merely examples and are not limited to the description content below.

[0009] In addition, a plurality of embodiments disclosed below include similar components. Therefore, hereinafter, the same reference numerals will be given to those similar components, and redundant descriptions will be omitted. Note that in this specification, ordinal numbers are used only for distinguishing parts and members, and do not indicate order or priority.

[0010] <First Embodiment> FIG. 1 is a cross-sectional view of the switch gear 1 according to the present embodiment. The switch gear 1 of the present embodiment is a solid insulation switch gear. However, the switch gear 1 is not limited thereto.

[0011] As shown in FIG. 1, the switch gear 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.

[0012] The housing 10 is made of, for example, metal and is configured in a rectangular parallelepiped 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 the electric circuit only when no current is flowing through the circuit. The grounding device 13 is a device for grounding an object by connecting to the object.

[0013] The main circuit 14 passes through the circuit breaker 11, the disconnector 12, and the grounding device 13.

[0014] In the following figures, for the sake of convenience, two directions orthogonal to each other 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 can 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 can also be referred to as the up - down direction.

[0015] 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 during connection, and the right side shows the positional relationship during removal. 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. Note that 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.

[0016] The fixed main circuit 20 has an upper fixed main circuit 20a located in the upward direction (+Y direction) of the fixed main circuit 20 and a lower fixed main circuit 20b located in the downward direction (-Y direction) of the fixed main circuit 20. Note that 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.

[0017] The upper fixed main circuit 20a has a conductor 20a2 covered by an upper fixed main circuit insulating portion 20a1. The upper fixed main circuit insulating portion 20a1 is made of an insulating synthetic resin material such as, for example, epoxy resin. Note that the upper fixed main circuit insulating portion 20a1 is an example of a first insulating portion.

[0018] 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, for example. The lower end face 20a3, which is the end face of the conductor 20a2 in the downward (-Y) direction, is exposed to the outside from the upper fixed main circuit insulating portion 20a1. The lower end face 20a3 is electrically connected by contacting the movable main circuit 21. Note that the lower end face 20a3 is an example of the first face.

[0019] The lower fixed main circuit 20b has a conductor 20b2 covered by a lower fixed main circuit insulating portion 20b1. The lower fixed main circuit insulating portion 20b1 is made of an insulating synthetic resin material such as epoxy resin, for example.

[0020] The lower fixed main circuit insulating portion 20b1 covers the conductor 20b2 except for a part of the constricted portion 20b3 of the conductor 20b2. Note that the lower fixed main circuit insulating portion 20b1 is an example of the second insulating portion.

[0021] The conductor 20b2 extends in the axial direction and has a cylindrical shape with a diameter that becomes thinner in the upward (+Y) direction from the constricted portion 20b3. The conductor 20b2 is made of a highly conductive metal material such as oxygen-free copper, for example. Note that the constricted portion 20b3 is an example of the first portion.

[0022] The upper end face 20b4, which is the end face of the conductor 20b2 in the upward (+Y) direction, and the side face 20b5, which is the side face of the conductor 20b2, are exposed to the outside from the lower fixed main circuit insulating portion 20b1. The side face 20b5 is electrically connected by contacting the movable main circuit 21. Note that the side face 20b5 is an example of the fourth face.

[0023] The movable main circuit 21 is located between the upper fixed main circuit 20a and the lower fixed main circuit 20b and is provided so as to be axially movable with respect 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 portion 21a1.

[0024] The movable main circuit insulating portion 21a1 is made of an insulating synthetic resin material such as, for example, epoxy resin. Note that the movable main circuit insulating portion 21a1 is an example of a third insulating portion.

[0025] The conductor 21a2 is made of a highly conductive metal material such as, for example, oxygen-free copper. The conductor 21a2 has a recess 21a3 that is recessed upward (+Y direction), a protrusion 21a4 that protrudes downward (-Y direction), and an upper end surface 21a5 that is the end surface of the conductor 21a2 in the upward (+Y direction). Note that the upper end surface 21a5 is an example of a second surface.

[0026] The recess 21a3 has an inner side surface 21a31 that is the inner side surface of the recess 21a3. Note that the inner side surface 21a31 is an example of a third surface.

[0027] The movable main circuit 21 is electrically connected when the lower end surface 20a3 of the upper fixed main circuit 20a abuts against the upper end surface 21a5 of the movable main circuit 21 and the lower fixed main circuit 20b fits into the recess 21a3 of the movable main circuit 21. In other words, in the movable interface connection structure 2, 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 surface contact with each other to conduct electricity.

[0028] 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 is movable between the formed air gaps 24.

[0029] The movable main circuit insulating portion 21a1 covers the conductor 21a2 except for the recess 21a3 and the upper end surface 21a5 of the conductor 21a2.

[0030] 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 portion 21a1. The first interface rubber 22 has a cylindrical shape that does not contact the lower end surface 20a3 of the conductor 20a2 and the upper end surface 21a5 of the conductor 21a2.

[0031] 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 portion 21a1. The second interface rubber 23 has a cylindrical shape that does not contact the side surface 20b5 of the conductor 20b2.

[0032] The first interface rubber 22 and the second interface rubber 23 seal the gaps formed 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 during energization.

[0033] As described above, the switch gear 1 includes the housing 10, the upper fixed main circuit 20a housed in the housing 10, the lower fixed main circuit 20b, 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 provided so as to be movable in the axial direction of the fixed main circuit 20 with respect to the upper fixed main circuit 20a and the lower fixed main circuit 20b.

[0034] When removing the upper fixed main circuit 20a or the lower fixed main circuit 20b housed in the housing 10 of the switch gear 1 of the present embodiment, the movable main circuit 21 located between the upper fixed main circuit 20a and the lower fixed main circuit 20b and movable with respect to the upper fixed main circuit 20a or the lower fixed main circuit 20b can be moved in the axial direction, for example, to create a gap between the upper fixed main circuit 20a and the movable main circuit 21. Thereby, it becomes 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.

[0035] In addition, in the present embodiment, the fixed main circuit 20 includes an upper fixed main circuit 20a covered by an upper fixed main circuit insulating portion 20a1 and a lower fixed main circuit 20b covered by a lower fixed main circuit insulating portion 20b1. The movable main circuit 21 is covered by a movable main circuit insulating portion 21a1.

[0036] The movable interface connection structure 2 includes a first interface rubber 22 provided between the upper fixed main circuit insulating portion 20a1 and the movable main circuit insulating portion 21a1, and a second interface rubber 23 provided between the lower fixed main circuit insulating portion 20b1 and the movable main circuit insulating portion 21a1.

[0037] Also, in the movable interface connection structure 2, 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 concave portion 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 surface contact with each other to conduct electricity.

[0038] Moreover, the movable main circuit 21 is movable in conjunction with the deformation of the first interface rubber 22 and the second interface rubber 23.

[0039] When removing the upper fixed main circuit 20a or the lower fixed main circuit 20b of the present 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. Along with the movement of the movable main circuit 21, 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 (-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.

[0040] This makes it possible to selectively remove either the upper fixed main circuit 20a or the lower fixed main circuit 20b. Therefore, the fixed main circuit 20 within the housing 10 of the switch gear 1 can be removed even more easily than before. Also, when assembling the switch gear 1, dimensional adjustment is possible by adjusting the position of the movable main circuit 21 in the axial direction. In the radial direction, since the current-carrying contact surface is a planar contact, dimensional adjustment can be achieved by moving the current-carrying contact surface.

[0041] Also, in this embodiment, the conductor 21a2 of the movable main circuit 21 has a protrusion 21a4 protruding from the end portion in the downward (-Y direction). The conductor 20b2 of the lower fixed main circuit 20b has a reduced diameter 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.

[0042] 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 countermeasure against this problem, a protrusion 21a4 protruding from the end portion in the downward (-Y direction) of the conductor 21a2 of the movable main circuit 21 is provided, and the conductor 20b2 of the lower fixed main circuit 20b has a reduced diameter from the constricted portion 20b3.

[0043] These cause the protrusion 21a4 and the shape with a reduced diameter from the constricted portion 20b3 to act as an electric field relaxation shield. Therefore, the electric field generated inside the second interface rubber 23 is relaxed. Also, according to such a configuration, it is possible to reduce the overall size compared to the conventional switch gear.

[0044] <Second Embodiment> FIG. 3 is a cross-sectional view of the movable interface connection structure 2A of the second embodiment. The left side shows the positional relationship during connection, and the right side shows the positional relationship during removal. The movable interface connection structure 2A of the second embodiment shown in FIG. 3 has the same configuration as the movable interface connection structure 2 of the first embodiment. Therefore, also by the second embodiment, the effects based on the same configuration as the first embodiment can be obtained.

[0045] 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.

[0046] As shown in FIG. 3, the conductor 20a2 of the upper fixed main circuit 20a has a recess 20a4 that is recessed upward (+Y direction).

[0047] The recess 20a4 has a bottom surface 20a41 that is the bottom surface of the recess 20a4 and an inner side surface 20a42 that is the side surface inside the recess 20a4. Note that the inner side surface 20a42 is an example of a fifth surface.

[0048] The conductor 21a2 of the movable main circuit 21 has a convex portion 21a6 that protrudes upward (+Y direction) from the upper end surface 21a5. The convex portion 21a6 has an outer side surface 21a61 that is the outer side surface of the convex portion 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. Note that the outer side surface 21a61 is an example of a sixth surface.

[0049] The cross-sectional shape of the movable main circuit insulating portion 21a1 is substantially V-shaped in the downward (-Y direction) due to a protruding portion 21a11 that protrudes from the end portion in the downward (-Y direction).

[0050] The lower fixed main circuit insulating portion 20b1 has a recess 20b11 that is recessed downward (-Y direction) so that the protruding portion 21a11 of the movable main circuit insulating portion 21a1 fits therein.

[0051] The length of the air gap 24 in the axial direction is provided to be longer than the length of the convex portion 21a6 of the movable main circuit 21 in the axial direction. In other words, in the axial direction, the convex portion 21a6 of the movable main circuit 21 protrudes shorter than the length of the air gap 24 in the axial direction.

[0052] The air space 25 is provided between the movable main circuit insulation part 21a1 of the movable main circuit 21 and the lower fixed main circuit insulation part 20b1, and the movable main circuit 21 is movable within the air space 25. The cross-sectional shape of the air space 25 forms a substantially V shape radially from the center. Note that the air space 25 is an example of a space.

[0053] Also, the length of the air space 25 in the axial direction is provided to be equal to or longer than the length of the air gap 24 in the axial direction.

[0054] The O-ring 26 is for fixing the movable main circuit 21 to the upper fixed main circuit 20a during energization. The O-ring 26 can prevent dust and foreign matter from entering the air space 25, thereby ensuring long-term insulation performance.

[0055] Also, the O-ring 26 is provided to block the gap 25a between the movable main circuit insulation part 21a1 and the lower fixed main circuit insulation part 20b1. In other words, the movable main circuit insulation part 21a1 is connected to the lower fixed main circuit insulation part 20b1 via the O-ring 26 in the vertical direction.

[0056] The movable interface connection structure 2A is electrically connected by fitting the convex part 21a6 of the movable main circuit 21 into the concave part 20a4 of the upper fixed main circuit 20a and fitting the concave part 21a3 of the movable main circuit 21 and the lower fixed main circuit 20b. In other words, the inner side surface 20a42 of the concave part 20a4 and the outer side surface 21a61 of the convex part 21a6 movable within the air space 25 are in cylindrical side surface 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 surface contact with each other to conduct electricity.

[0057] When the movable interface connection structure 2A is in contact with the cylindrical side surface, the convex portion 21a6 of the movable main circuit 21 in the axial direction protrudes shorter than the length of the air gap 24 in the axial direction. Further, the length of the air space 25 in the axial direction is provided to be equal to or longer than the length of the air gap 24 in the axial direction. Thereby, the convex portion 21a6 of the movable main circuit 21 can be removed from the concave portion 20a4 of the upper fixed main circuit 20a.

[0058] As described above, the fixed main circuit 20 includes an upper fixed main circuit 20a covered by the upper fixed main circuit insulating portion 20a1 and a lower fixed main circuit 20b covered by the lower fixed main circuit insulating portion 20b1. The conductor 20a2 of the upper fixed main circuit 20a is provided with a concave portion 20a4 that is recessed upward (+Y direction). The movable main circuit 21a covered by the movable main circuit insulating portion 21a1 is provided with a convex portion 21a6 that protrudes upward (+Y direction).

[0059] The movable interface connection structure 2A includes a first interface rubber 22 provided between the upper fixed main circuit insulating portion 20a1 and the movable main circuit insulating portion 21a1, and an air space 25 provided between the lower fixed main circuit insulating portion 20b1 and the movable main circuit insulating portion 21a1.

[0060] Also, in the movable interface connection structure 2A, the inner side surface 20a42 of the concave portion 20a4 and the outer side surface 21a61 of the convex portion 21a6 that can move within the air space 25 are in contact with each other on the cylindrical side surface, 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 contact with each other on the cylindrical side surface to conduct electricity.

[0061] When removing the upper fixed main circuit 20a or the lower fixed main circuit 20b of 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 within the air cavity 25 provided between the lower fixed main circuit insulating portion 20b1 and the movable main circuit insulating portion 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.

[0062] Thus, by moving the movable main circuit 21 into the air cavity 25, it becomes possible to selectively remove either the upper fixed main circuit 20a or the lower fixed main circuit 20b. Therefore, it becomes possible to more easily remove the fixed main circuit 20 within the housing 10 of the switchgear 1 than before.

[0063] Also, in this embodiment, the conductor 21a2 of the movable main circuit 21 has a protrusion 21a4 protruding from the end in the downward (-Y direction). The movable main circuit insulating portion 21a1 has a protruding portion 21a11 protruding downward (-Y direction) so as to cover the protrusion 21a4. The lower fixed main circuit insulating portion 20b1 has a recess 20b11 into which the protruding portion 21a11 fits.

[0064] When discharge occurs in the fixed main circuit 20 and the movable main circuit 21, it is difficult to insulate the air cavity 25. As a countermeasure against this problem, a protruding portion 21a11 protruding from the end of the movable main circuit insulating portion 21a1 of the movable main circuit 21 in the downward (-Y direction) is provided.

[0065] As a result, the cross-sectional shape of the air cavity 25 forms a substantially V shape radially outward from the center. On the other hand, since the electric field direction within the air cavity 25 is radially outward, the protruding portion 21a11 acts as an electric field relaxation shield with respect to the electric field direction.

[0066] Therefore, when discharge occurs in the air space 25, the discharge is directed outward 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 protruding portion 21a11 increases the creepage distance during discharge, thereby improving the insulation strength.

[0067] <Third Embodiment> FIG. 4 is a cross-sectional view of the movable interface connection structure 2B according to the third embodiment. The left side shows the positional relationship during connection, and the right side shows the positional relationship during removal. The movable interface connection structure 2B according to the third embodiment shown in FIG. 4 has the same configuration as the movable interface connection structures 2 and 2A according to the first and second embodiments. Therefore, also according to the third embodiment, the effects based on the same configuration as those of the first and second embodiments can be obtained.

[0068] However, in the third embodiment, as shown in FIG. 4, a ground shield 27 is embedded in the movable main circuit insulating portion 21a1.

[0069] 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) and bends halfway and extends radially outward.

[0070] The ground shield 27 has an external terminal 27a. Note that the external terminal 27a is an example of one end.

[0071] The external terminal 27a is exposed to the outside from the movable main circuit insulating portion 21a1 of the ground shield 27 to set the ground shield 27 itself to the ground potential. Note that the external terminal 27a serves as the end point of the discharge when discharge occurs in the air space 25. Therefore, it is desirable to position it as far as possible from the starting point of the discharge in order to ensure the creepage distance during discharge.

[0072] As described above, the movable main circuit insulating portion 21a1 has the ground shield 27. The external terminal 27a of the ground shield 27 is exposed to the outside.

[0073] When discharge occurs in the fixed main circuit 20 and the movable main circuit 21, the ground shield 27 does not allow the electric field to penetrate into the region radially outside the ground shield 27.

[0074] Thereby, the electric field in the gap 25a outside the air space 25 can be reduced. Further, by reducing the electric field in the gap 25a, it is possible to further reduce the overall size as compared with the conventional switchgear.

[0075] Note that the configuration of the movable interface connection structure is not limited to the configurations of the movable interface connection structures 2, 2A, and 2B. For example, in the above embodiment, the lower fixed main circuit 20b is located outside and the movable main circuit 21 is located 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 these relationships may be reversed.

[0076] Also, in the above embodiment, the ground shield 27 is embedded in the movable main circuit insulating portion 21a1, but for example, the ground shield 27 may be embedded in the fixed main circuit 20.

[0077] FIG. 5 is a flowchart showing the process until the fixed main circuit 20 of the first embodiment is removed. FIG. 6 is a flowchart showing the process until the fixed main circuit 20 of the second and third embodiments is removed.

[0078] As shown in FIGS. 5 and 6, in step S1, the movable main circuit 21 is moved downward (-Y direction) by the amount of the air gap 24.

[0079] In the case of 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 case of the second and third embodiments, in step S2B, the movable main circuit 21 moves within the air space 25.

[0080] In step S3, in the case of the first embodiment, when the second interface rubber 23 is compressed in step S2A, a gap is generated between the upper fixed main circuit 20a and the first interface rubber 22. In the case of the second and third embodiments, when the movable main circuit 21 moves within the air space 25 in step S2B, a gap is generated between the upper fixed main circuit 20a and the first interface rubber 22.

[0081] In step S4, when the fixing of the upper fixed main circuit 20a is released in the state of step S3 and it is slid in the radial direction, the upper fixed main circuit 20a can be easily removed.

[0082] Also, when the fixing of the lower fixed main circuit 20b is released in the state of step S3 and it is slid in the radial direction, the lower fixed main circuit 20b can be easily removed.

[0083] When assembling the fixed main circuit 20, first, within the range where sufficient capacitance is ensured, the axial position of the movable main circuit 21 is adjusted.

[0084] Furthermore, in the case of the first embodiment, the lower end surface 20a3 of the upper fixed main circuit 20a having a planar shape and the upper end surface 21a5 of the movable main circuit 21 are adjusted while sliding in the radial direction. Then, the movable main circuit 21 is attached at the adjusted position.

[0085] As described above, several embodiments of the present invention have been described. However, 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, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and its equivalent scope.

Explanation of Reference Numerals

[0086] 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 Portion (First Insulating Portion) 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 Insulating Portion (Second Insulating Portion) 20b11 Recess 20b2 Conductor 20b3 Constriction Portion (First Portion) 20b5 Side Surface (Fourth Surface) 21 Movable Main Circuit 21a1 Movable Main Circuit Insulating Portion (Third Insulating Portion) 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 Gap 27 Grounding Shield 27a External Terminal (One End)

Claims

1. A housing, a plurality of fixed main circuits housed in the housing, a movable main circuit positioned between the plurality of fixed main circuits and provided movably in the axial direction of any one of the plurality of fixed main circuits, and a connection structure having the same, comprising: the fixed main circuit has 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, and 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 surface contact with each other, the first fixed main circuit is covered by a first insulating portion, the second fixed main circuit is covered by a second insulating portion, the movable main circuit is covered by a third insulating portion, the connection structure has 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 the deformation of the first elastic member or the second elastic member, a switch gear.

2. The conductor of the movable main circuit has a protrusion protruding from an end portion in the axial direction, the conductor of the second fixed main circuit has a reduced diameter from a first portion, and a part of the conductor of the second fixed main circuit is exposed from the second insulating portion, The switch gear according to claim 1.

3. The conductor of the first fixed main circuit is provided with a recess recessed in the axial direction, the conductor of the movable main circuit is provided with a convex portion 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 surface contact with each other, and a fifth surface of the recess along the axial direction and a sixth surface of the convex portion along the axial direction are in cylindrical side surface contact with each other, The switch gear according to claim 1.

4. 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 switch gear according to claim 3.

5. The conductor of the movable main circuit has a protrusion 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 protruding portion fits, The conductor of the second fixed main circuit becomes thinner in diameter from the first part, and a part of the conductor of the second fixed main circuit is exposed from the second insulating part. The switchgear according to claim 4. **Claim 6** The third insulating part has a ground shield. One end of the ground shield is exposed to the outside. The switchgear according to claim 5.

Images