JP7123023B2 - Isolation barriers and switchgear - Google Patents

Description

The present invention relates to insulating barriers and switches with insulating barriers.

For switches, disconnectors, circuit breakers, etc., the terminals corresponding to each phase of the three-phase alternating current are insulated from each other to prevent small animals such as rats and snakes from entering the switch and shorting the terminals. Some have insulating barriers for Patent Literature 1 discloses a switch provided with this type of insulation barrier.

JP-A-6-139884

When a small animal collides with an insulation barrier provided in a switch, disconnector, circuit breaker, etc., the insulation barrier may be deformed. In particular, when a small animal collides with the main surface of the insulating barrier, the insulating barrier is greatly deformed and contacts surrounding members, such as terminals to which high voltage is applied, which may cause failure of switches, disconnectors, and the like. be. In order to suppress such deformation, the insulating barrier is formed of a highly rigid laminated plate. When forming an insulating barrier with a highly rigid laminated plate, a mounting member is required for mounting the insulating barrier formed by cutting out from the original plate to the base to which the terminals are fixed. Specifically, a plurality of mounting members are provided along the sides of the insulating barrier, as disclosed in US Pat. If the mounting positions of multiple mounting members on the base differ from the design positions due to variations in the dimensions of components such as switches, disconnectors, circuit breakers, etc., the positions where the mounting members are fixed to the insulation barrier and the shape of the mounting members etc. must be adjusted, which complicates the process of attaching the insulating barrier to the base.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an insulating barrier that is prevented from coming into contact with surrounding members due to deformation and that can be easily attached, and a switch having the insulating barrier. do.

To achieve the above object, an insulating barrier according to the present invention is an insulating barrier attached to a base at a position adjacent to a terminal fixed to the base, the insulating barrier being a convex portion on one main surface, and Insulative material having a plurality of first uneven portions that are concave portions on the other main surface and a plurality of second uneven portions that are concave portions on one main surface and convex portions on the other main surface A plate member is provided. The plate member is attached to the base with one major surface or the other major surface adjacent to the terminal and the side surface facing the base. The plurality of first uneven portions and the plurality of second uneven portions are arranged in a first direction along the side surface facing the base on one main surface and in a second direction crossing the first direction on the one main surface, respectively. placed along. The alignment of the first uneven portions and the second uneven portions along the first direction is different from the alignment of the first uneven portions and the second uneven portions along the second direction. The bending rigidity of the plate member in the first direction is lower than the bending rigidity of the plate member in the second direction.

Since the plate-shaped member provided in the insulating barrier according to the present invention has a plurality of first uneven portions and a plurality of second uneven portions, the rigidity of the plate-shaped member is higher than that of a flat plate, so that deformation causes contact with surrounding members. is suppressed. Further, by making the bending rigidity of the plate-shaped member in the first direction lower than the bending rigidity of the plate-shaped member in the second direction intersecting the first direction, the plate-shaped member can be mounted on the base even if the position where the plate-shaped member is attached to the base is deviated. Since the shaped member can be bent and attached to the base, the attachment process is simple.

A circuit diagram of a switch according to Embodiment 1 of the present invention A perspective view of a switch according to Embodiment 1 Front view of switch according to Embodiment 1 1 is a perspective view of an insulating barrier according to Embodiment 1. FIG. A cross-sectional view of the insulating barrier according to the first embodiment taken along line AA in FIG. A cross-sectional view of the insulating barrier according to the first embodiment taken along line BB in FIG. Cross-sectional view of the insulating barrier according to the first embodiment taken along line CC in FIG. A perspective view of an insulating barrier according to Embodiment 2 of the present invention. A cross-sectional view of the insulating barrier according to the second embodiment taken along the line DD in FIG. 8 A cross-sectional view of the insulating barrier according to the second embodiment taken along line EE in FIG.

DETAILED DESCRIPTION OF THE INVENTION Insulating barriers and switches according to embodiments of the present invention will now be described in detail with reference to the drawings. In the drawings, the same reference numerals are given to the same or equivalent parts.

(Embodiment 1)
The insulation barrier according to the first embodiment will be described with an insulation barrier mounted on a switch as an example. A switch 1 shown in FIG. 1 electrically connects or disconnects a power-consuming load such as a power conversion device, an electric motor, a lighting device, or an air conditioner from a power source. In Embodiment 1, the structure of the switch 1 will be described by taking as an example a switch that electrically connects or disconnects a load from a three-phase AC power supply.

As shown in the circuit diagram of FIG. 1, the switch 1 includes primary terminals 11a, 11b, 11c and secondary terminals 12a, 12b, 12c corresponding to each phase of a three-phase alternating current, and primary terminals 11a, 11b corresponding to the respective primary terminals 11a, 11b. , 11c and the secondary terminals 12a, 12b, 12c.

The switch portion 13a moves between the auxiliary contactor 14a and the main contactor 15a connected to the primary terminal 11a, the position in contact with the auxiliary contactor 14a, and the position separated from the auxiliary contactor 14a. a movable contact 16a, and a movable contact 17a movable between a position in contact with the main contact 15a and a position spaced apart from the main contact 15a.

Similarly, the switch portion 13b has an auxiliary contactor 14b and a main contactor 15b connected to the primary terminal 11b, and a position in contact with the auxiliary contactor 14b and a position separated from the auxiliary contactor 14b. and a movable contact 17b movable between a position in contact with the main contact 15b and a position separated from the main contact 15b.

Similarly, the switch portion 13c has an auxiliary contactor 14c and a main contactor 15c connected to the primary terminal 11c, and a position in contact with the auxiliary contactor 14c and a position separated from the auxiliary contactor 14c. and a movable contact 17c movable between a position in contact with the main contact 15c and a position separated from the main contact 15c.

Further, the switch 1 includes a fuse 18a having one end connected to the movable contacts 16a and 17a and the other end connected to the secondary terminal 12a, and a fuse 18a having one end connected to the movable contacts 16b and 17b and having the other end connected to the secondary terminal. A fuse 18b connected to the terminal 12b and a fuse 18c having one end connected to the movable contacts 16c and 17c and the other end connected to the secondary terminal 12c are provided.

Furthermore, as shown in FIGS. 2 and 3, the switch 1 includes arc-extinguishing chambers 21a, 21b, and 21c that extinguish arcs generated when the switch portions 13a, 13b, and 13c are opened, a plate-like base 22, It includes arms 23a, 23b, and 23c rotating around one end, an operation unit 24 rotating the arms 23a, 23b, and 23c, and a bar 25 to which one end of the arms 23a, 23b, and 23c is attached.

Further, the switch 1 includes insulating barriers 26a positioned between adjacent primary terminals 11a and 11b and between adjacent secondary terminals 12a and 12b, and adjacent primary terminals 11b and 11c. and an insulating barrier 26b located between and between adjacent secondary terminals 12b and 12c. The switch 1 has an insulating barrier 26c provided at a position sandwiching the primary terminal 11a and the secondary terminal 12a with the insulating barrier 26a, and a switch 1 positioned between the primary terminal 11c and the secondary terminal 12c and the operating portion 24. and an insulating barrier 26d.

2 and 3, the Z axis indicates the vertical direction, and the X axis indicates the direction in which the primary terminals 11a, 11b and 11c are arranged and the direction in which the secondary terminals 12a, 12b and 12c are arranged. The Y-axis is orthogonal to each of the Z-axis and the X-axis.

Each of the primary terminals 11a, 11b, 11c is attached to the base 22 and connected to corresponding output terminals of a three-phase AC power supply. Each of the secondary terminals 12a, 12b, 12c is mounted on the base 22 and connected to a corresponding input terminal of the load. In Embodiment 1, the primary terminal 11a and the secondary terminal 12a are attached to the base 22 with a space therebetween along the Z-axis direction. Similarly, the primary terminal 11b and the secondary terminal 12b are attached to the base 22 with a space therebetween along the Z-axis direction. Similarly, the primary terminal 11c and the secondary terminal 12c are attached to the base 22 with a space therebetween along the Z-axis direction.

The auxiliary contacts 14a, 14b, 14c are provided inside the arc-extinguishing chambers 21a, 21b, 21c, respectively. The main contacts 15a, 15b, 15c are attached to the base 22. As shown in FIG.

Movable contacts 16a, 16b and 16c are attached to arms 23a, 23b and 23c, respectively. Specifically, the movable contacts 16a, 16b, and 16c are attached to the ends opposite to the ends that are pivotal centers of the arms 23a, 23b, and 23c, respectively. As the arms 23a, 23b, and 23c rotate, the movable contacts 16a, 16b, and 16c move away from the auxiliary contacts 14a, 14b, and 14c, respectively. to move between

Similarly, movable contacts 17a, 17b and 17c are attached to arms 23a, 23b and 23c, respectively. Specifically, the movable contacts 17a, 17b, and 17c are attached to the ends opposite to the ends that are pivotal centers of the arms 23a, 23b, and 23c, respectively. By rotating the arms 23a, 23b, 23c, the movable contacts 17a, 17b, 17c are separated from the positions where they are in contact with the main contacts 15a, 15b, 15c and the main contacts 15a, 15b, 15c, respectively. to move between

When the switch portions 13a, 13b, and 13c are closed, the movable contacts 16a, 16b, and 16c contact the auxiliary contacts 14a, 14b, and 14c, respectively, and then the movable contacts 17a, 17b, and 17c respectively contact the main contacts. Movable contacts 16a, 16b, 16c are attached to arms 23a, 23b, 23c, respectively, at positions where contactors 15a, 15b, 15c can be contacted, and movable contacts 17a, 17b, 17c are respectively attached to arms 23a, 23b, 23c. It is attached to arms 23a, 23b and 23c.

Fuses 18a, 18b and 18c are attached to arms 23a, 23b and 23c, respectively. Further, the fuses 18a, 18b, 18c are fused to break the circuit when an overcurrent flows, respectively, and electrically disconnect the primary terminals 11a, 11b, 11c from the secondary terminals 12a, 12b, 12c.

Arc-extinguishing chambers 21 a , 21 b , 21 c are attached to base 22 . The arc extinguishing chamber 21a extinguishes the arc generated when the switch portion 13a is opened, that is, when the movable contactor 16a is separated from the auxiliary contactor 14a. Similarly, the arc extinguishing chamber 21b extinguishes the arc generated when the switch portion 13b is opened, that is, when the movable contact 16b is separated from the auxiliary contact 14b. Similarly, the arc extinguishing chamber 21c extinguishes the arc generated when the switch portion 13c is opened, that is, when the movable contactor 16c is separated from the auxiliary contactor 14c.

The base 22 is made of a highly rigid member such as metal. The arms 23a, 23b, and 23c are plate-like or rod-like members, for example, and rotate around the X-axis around a point fixed to the bar 25. As shown in FIG. The operation unit 24 rotates the bar 25 in response to a signal from the outside, an operation to the operation unit 24, or the like, thereby rotating the arms 23a, 23b, and 23c to control the switches 13a, 13b, and 13c. The switches 13a, 13b and 13c are opened and closed. The bar 25 extends along the X-axis, is connected to the operating part 24 and is rotated by the operating part 24 .

Isolation barrier 26a is located between primary terminals 11a and 11b and between secondary terminals 12a and 12b. Specifically, insulating barrier 26a is attached to base 22 with one major surface adjacent primary terminal 11b and secondary terminal 12b and the other major surface adjacent primary terminal 11a and secondary terminal 12a. The distance between the insulating barrier 26a and each of the primary terminals 11a, 11b and the secondary terminals 12a, 12b is determined by the size, structure, etc. of the switch 1, and is, for example, several tens of millimeters. By providing the insulating barrier 26a, small animals such as rats and snakes contact the primary terminals 11a and 11b, or the secondary terminals 12a and 12b, causing a short circuit between the phases of the three-phase alternating current. is suppressed.

Similarly, insulating barrier 26b is located between primary terminal 11b and primary terminal 11c and between secondary terminal 12b and secondary terminal 12c. Specifically, insulating barrier 26b is attached to base 22 with one major surface adjacent primary terminal 11c and secondary terminal 12c and the other major surface adjacent primary terminal 11b and secondary terminal 12b. As with the insulation barrier 26a, the distances between the insulation barrier 26b and the primary terminals 11b, 11c and the secondary terminals 12b, 12c are determined by the size, structure, etc. of the switch 1, and are, for example, several tens of millimeters. be. By providing the insulating barrier 26b, occurrence of a short circuit between the phases of the three-phase alternating current is suppressed.

The insulating barrier 26c is positioned with the primary terminal 11a and the secondary terminal 12a sandwiched between the insulating barrier 26a and the insulating barrier 26a. Specifically, insulating barrier 26c is attached to base 22 with one major surface adjacent to primary terminal 11a and secondary terminal 12a. As with the insulation barrier 26a, the distance between the insulation barrier 26c and each of the primary terminal 11a and the secondary terminal 12a is determined by the size, structure, etc. of the switch 1, and is, for example, several tens of millimeters. By providing the insulating barrier 26c, small animals such as rats and snakes are prevented from contacting the housing housing the switch 1 and the primary terminal 11a or the secondary terminal 12a and causing a ground fault.

The insulating barrier 26 d is located between the primary terminal 11 c and the secondary terminal 12 c and the operating portion 24 . Specifically, insulating barrier 26d is attached to base 22 at a position adjacent to operating portion 24 on one major surface and adjacent to primary terminal 11c and secondary terminal 12c on the other major surface. As with the insulation barrier 26a, the distance between the insulation barrier 26d and each of the primary terminal 11c and the secondary terminal 12c is determined by the size, structure, etc. of the switch 1, and is, for example, several tens of millimeters. By providing the insulating barrier 26d, occurrence of a ground fault between the primary terminal 11c or the secondary terminal 12c and the operating portion 24 is suppressed.

Insulating barriers 26a, 26b, 26c, and 26d are deformed and come into contact with surrounding members when small animals come into contact with the insulating barriers 26a, 26b, 26c, and 26d. 26a, 26b, 26c, and 26d have high bending rigidity in the Y-axis direction. Specifically, the insulating barriers 26a, 26b, 26c, and 26d have high bending rigidity in the Y-axis direction to such an extent that they are not deformed by contact with small animals. The bending rigidity in the Y-axis direction indicates the resistance to bending deformation of the insulating barriers 26a, 26b, 26c, and 26d when one end in the Y-axis direction is fixed and a load is applied to the other end in the Y-axis direction. The higher the bending rigidity, the less likely it is to bend.

Moreover, when the insulating barriers 26a, 26b, 26c, and 26d are attached to the base 22 at a plurality of attachment positions, the attachment positions may vary and the attachment positions may not be strictly aligned in the Z-axis direction. Even in such a case, the bending rigidity in the Z-axis direction of the insulating barriers 26a, 26b, 26c, and 26d is such that the insulating barriers 26a, 26b, 26c, and 26d can be attached to the base 22. lower than stiffness. The bending rigidity in the Z-axis direction indicates the resistance to bending deformation of the insulation barriers 26a, 26b, 26c, and 26d when one end in the Z-axis direction is fixed and a load is applied to the other end in the Z-axis direction.

The structures of the insulating barriers 26a, 26b, 26c, and 26d for having different flexural rigidity in the Y-axis direction and the Z-axis direction will be described. Since the insulating barriers 26a, 26b, 26c, and 26d have the same structure, the structure of the insulating barrier 26a will be described.

In the first embodiment, the insulating barrier 26a is composed of an insulating plate-like member 30 whose longitudinal direction is along the Z-axis and whose lateral direction is along the Y-axis; Mounting portions 33 and 34 are provided. The plate member 30 is preferably made of synthetic resin. Furthermore, it is preferable that the plate member 30 and the mounting portions 33 and 34 are integrally formed.

As shown in FIG. 4, the plate member 30 includes a plurality of first uneven portions 31, which are protrusions on one main surface 30a and recesses on the other main surface 30b, and recesses on the main surface 30a. and a plurality of second uneven portions 32 that are convex portions of the main surface 30b.

The lengths in the X-axis direction of the projections of the first uneven portion 31 and the recesses of the second uneven portion 32 are determined according to the bending rigidity required for the plate-like member 30 . For example, the lengths in the X-axis direction of the projections of the first uneven portion 31 and the recesses of the second uneven portion 32 are several millimeters.

The plurality of first concave-convex portions 31 and the plurality of second concave-convex portions 32 are arranged in a first direction along the side surface of the plate-like member 30 facing the base 22 on the main surface 30a, that is, the Z-axis direction, and the main surface 30a. are arranged along a second direction that intersects the first direction at , that is, along each of the Y-axis directions. In Embodiment 1, the first uneven portion 31 and the second uneven portion 32 are arranged in a V shape on the YZ plane. Therefore, the alignment of the first uneven portions 31 and the second uneven portions 32 along the first direction is different from the alignment of the first uneven portions 31 and the second uneven portions 32 along the second direction.

Specifically, the same number of the first uneven portions 31 and the second uneven portions 32 are alternately arranged along the first direction. For example, as shown in FIG. 5, which is a cross-sectional view taken along the line AA in FIG. 4, the first concave-convex portions 31 and the second concave-convex portions 32 are arranged alternately one by one in the Z-axis direction. .

Also, along the second direction, the first uneven portions 31 and the second uneven portions 32 are alternately arranged in different numbers. For example, as shown in FIG. 6, which is a cross-sectional view taken along line BB of FIG. are arranged alternately. Further, for example, as shown in FIG. 7, which is a cross-sectional view taken along the line CC of FIG. 4, one second uneven portion 32 and two adjacent first uneven portions 31 are arranged alternately.

The flexural rigidity in the first direction, which is the direction in which the same number of the first uneven portions 31 and the second uneven portions 32 are alternately arranged, lower than the bending stiffness in the second direction, which is the direction in which the and are alternately arranged.

At least one of the plurality of first uneven portions 31 has a cross-sectional shape parallel to the main surface 30a of a regular hexagon. Specifically, the shape of the cross section parallel to the main surface 30a of the first uneven portions 31 excluding the first uneven portions 31 positioned at the ends in the Z-axis direction and the Y-axis direction is a regular hexagon.

Similarly, the shape of the cross section of at least one of the plurality of second uneven portions 32 parallel to the main surface 30a is a regular hexagon. Specifically, the shape of the cross section parallel to the main surface 30a of the second uneven portions 32 excluding the second uneven portions 32 positioned at the ends in the Z-axis direction and the Y-axis direction is a regular hexagon.

The mounting portion 33 has a shape to be inserted into and locked to a slit (not shown) formed in the base 22 . The mounting portion 34 has a clip-like shape that fits into a projection (not shown) formed on the base 22 . The insulating barrier 26 a is attached to the base 22 by inserting the attachment portion 33 into the slit of the base 22 and then fitting the protrusion portion of the base 22 with the attachment portion 34 .

The positions of the slits and protrusions of the base 22, which are the mounting positions of the insulating barrier 26a, may differ from the designed positions. For example, the slits and protrusions of the base 22 are designed to be aligned along the Z-axis, whereas in the actual base 22 the slits and protrusions may not be aligned along the Z-axis. Even in such a case, without adjusting the positions of the mounting portions 33 and 34, the mounting portion can be adjusted by inserting the mounting portion 33 of the insulating barrier 26a into the slit and bending the plate-like member 30 in a state of being engaged with the slit. The insulating barrier 26a can be attached to the base 22 by fitting 34 to the projections.

As described above, the plate member 30 included in each of the insulating barriers 26a, 26b, 26c, and 26d according to Embodiment 1 has the plurality of first uneven portions 31 and the plurality of second uneven portions 32, so that the plate-like member 30 is flat. More rigid. As a result, the insulating barriers 26a, 26b, 26c, and 26d are prevented from being deformed and coming into contact with peripheral members due to collisions with small animals, for example. By making the bending rigidity of the plate-like member 30 in the Z-axis direction lower than the bending rigidity of the plate-like member 30 in the Y-axis direction, even if the positions at which the insulating barriers 26a, 26b, 26c, and 26d are attached to the base 22 deviate, Since the plate member 30 can be bent and attached to the base 22, the process of attaching the insulating barriers 26a, 26b, 26c, and 26d is simple.

When the plate-like member 30 and the mounting portions 33, 34 are integrally molded using a mold, the manufacturing process of the insulating barriers 26a, 26b, 26c, 26d is simple. In addition, by displaying the precautions for use on the main surface 30a or the main surface 30b of the plate-like member 30, it is possible to affix a sticker indicating the precautions for use after manufacturing, to imprint a stamp, or the like. This eliminates the need for insulating barriers 26a, 26b, 26c, and 26d, which simplifies the manufacturing process.

(Embodiment 2)
The structure of the plate member 30 included in the insulating barriers 26a, 26b, 26c, and 26d is not limited to the above example, and may be any structure having different flexural rigidity in the first direction and the second direction. A plate-like member 30 having a shape different from that of the plate-like member 30 according to the first embodiment will be described in the second embodiment.

The plate-like member 30 according to the second embodiment differs from the plate-like member 30 according to the first embodiment in the arrangement of the first concave-convex portion 31 and the second concave-convex portion 32 . The plurality of first concave-convex portions 31 and the plurality of second concave-convex portions 32 are arranged in a first direction along the side surface of the plate-like member 30 facing the base 22 on the main surface 30a, that is, the Z-axis direction, and the main surface 30a. are arranged along a second direction that intersects the first direction at , that is, along each of the Y-axis directions. As shown in FIG. 8, the first concave-convex portion 31 and the second concave-convex portion 32 are arranged in a zigzag along the Y-axis direction. Therefore, the alignment of the first uneven portions 31 and the second uneven portions 32 along the first direction is different from the alignment of the first uneven portions 31 and the second uneven portions 32 along the second direction.

Specifically, the same number of the first uneven portions 31 and the second uneven portions 32 are alternately arranged along the first direction in the same manner as in the first embodiment. A cross section along the first direction is the same as in FIG.

In addition, along the second direction, the first uneven portions 31 are arranged in a zigzag manner, and the second uneven portions 32 are arranged in a zigzag manner. For example, as shown in FIG. 9, which is a cross-sectional view taken along line DD of FIG. 8, the first uneven portions 31 are arranged continuously in the Y-axis direction. Further, for example, as shown in FIG. 10, which is a cross-sectional view taken along the line EE in FIG. 8, the second concave-convex portions 32 are continuously arranged in the Y-axis direction.

The flexural rigidity in the first direction, which is the direction in which the same number of the first uneven portions 31 and the second uneven portions 32 are alternately arranged, is measured when the first uneven portions 31 or the second uneven portions 32 are continuously arranged. lower than the bending stiffness in the second direction, which is the direction in which the

As described above, in the plate member 30 included in each of the insulating barriers 26a, 26b, 26c, and 26d according to the second embodiment, the same number of the first uneven portions 31 are alternately arranged in the first direction. The first concave-convex portion 31 or the second concave-convex portion 32 is continuously arranged in a zigzag in the direction. As a result, the rigidity of the plate-like member 30 is higher than that of a flat plate, so deformation of the insulating barriers 26a, 26b, 26c, and 26d due to collision by a small animal, for example, and contact with peripheral members are suppressed. By making the bending rigidity of the plate-like member 30 in the Z-axis direction lower than the bending rigidity of the plate-like member 30 in the Y-axis direction, even if the positions at which the insulating barriers 26a, 26b, 26c, and 26d are attached to the base 22 deviate, Since the plate member 30 can be bent and attached to the base 22, the process of attaching the insulating barriers 26a, 26b, 26c, and 26d is simple.

The cross-sectional shapes of the first uneven portion 31 and the second uneven portion 32 parallel to the main surface 30a are not limited to hexagons and may be arbitrary. As an example, the cross-sectional shape of the first uneven portion 31 and the second uneven portion 32 parallel to the main surface 30a may be any polygon, circle, oval, or the like.

The lengths in the X-axis direction of the projections of the first uneven portion 31 and the recesses of the second uneven portion 32 are not limited to the above examples, and can be arbitrarily determined according to the bending rigidity required for the plate-like member 30. . The length in the X-axis direction of the protrusions of some of the first uneven portions 31 may be set to a value different from the length in the X-axis direction of the protrusions of the other first uneven portions 31 . Similarly, the length in the X-axis direction of the recesses of some of the second uneven portions 32 may be different from the length of the recesses of the other second uneven portions 32 in the X-axis direction. Also, the length in the X-axis direction of the projection of the first uneven portion 31 and the length in the X-axis direction of the recess of the second uneven portion 32 may be different values.

Also, the space between two adjacent first uneven portions 31, between two adjacent second uneven portions 32, or between adjacent first uneven portion 31 and second uneven portion 32 may be flat.

The arrangement of the first concave-convex portion 31 and the second concave-convex portion 32 is not limited to the above example. and the second concave-convex portion 32 can be arranged at arbitrary positions. As an example, the first concave-convex portion 31 or the second concave-convex portion 32 may be arranged in a line along the second direction.
The plate-shaped member 30 may be formed of a single plate-shaped synthetic resin, or may be formed by joining a plurality of plate-shaped synthetic resins by snap-fitting, for example.

The shape of the attachment portions 33 and 34 is not limited to the above example, and may be any shape that allows the plate member 30 to be attached to the base 22 . As an example, both of the mounting portions 33 and 34 may be plate-like protrusions that fit into two slits formed in the base 22, respectively. The insulating barriers 26 a , 26 b , 26 c , 26 d may also have a shape for attaching the plate-like member 30 to the base 22 in addition to the attachment portions 33 , 34 .

The mounting positions of the insulating barriers 26a, 26b, 26c, and 26d are not limited to the above example, and they can be mounted at any position as long as they are adjacent to the terminals fixed to the base 22. FIG. Specifically, one of the main surfaces 30a, 30b of the plate member 30 of the insulating barriers 26a, 26b, 26c, 26d is adjacent to an arbitrary terminal fixed to the base 22, and the side surface of the plate member 30 is As long as the plate-like member 30 is attached to the base 22 while facing the base 22, the attachment position and attachment direction of the plate-like member 30 are arbitrary.

The structure of the switch 1 including the insulating barriers 26a, 26b, 26c, and 26d is not limited to the above example, and any structure can be used as long as it electrically connects or disconnects the load from the power supply. As an example, a resistor may be provided in an electric circuit connecting each of the movable contacts 17a, 17b, 17c and the fuses 18a, 18b, 18c. The switch 1 includes a disconnecting switch, a circuit breaker, and the like.

1 switches 11a, 11b, 11c primary terminals 12a, 12b, 12c secondary terminals 13a, 13b, 13c switch parts 14a, 14b, 14c auxiliary contacts 15a, 15b, 15c main contacts 16a, 16b , 16c, 17a, 17b, 17c movable contact, 18a, 18b, 18c fuse, 21a, 21b, 21c arc extinguishing chamber, 22 base, 23a, 23b, 23c arm, 24 operating portion, 25 bar, 26a, 26b, 26c , 26d insulating barrier, 30 plate member, 30a, 30b main surface, 31 first uneven portion, 32 second uneven portion, 33, 34 mounting portion.

Claims (9)

An isolation barrier attached to the base at a location adjacent to a terminal secured to the base, comprising:
A plurality of first uneven portions that are convex portions on one main surface and concave portions on the other main surface, and concave portions on the one main surface and convex portions on the other main surface and an insulating plate-shaped member having a plurality of second uneven portions,
The plate member is attached to the base with the one main surface or the other main surface adjacent to the terminal and the side surface facing the base,
The plurality of first uneven portions and the plurality of second uneven portions are arranged in a first direction along the side surface facing the base on the one main surface and crossing the first direction on the one main surface. arranged along each of the second directions to
Different from the arrangement of the first uneven portion and the second uneven portion along the first direction and the arrangement of the first uneven portion and the second uneven portion along the second direction,
bending rigidity of the plate-shaped member in the first direction is lower than bending rigidity of the plate-shaped member in the second direction;
insulating barrier. The same number of the first uneven portions and the second uneven portions are alternately arranged along the first direction,
The insulating barrier of claim 1. Along the second direction, the first uneven portions and the second uneven portions are alternately arranged in different numbers.
3. The insulating barrier according to claim 1 or 2. The first uneven portion or the second uneven portion is arranged continuously along the second direction,
4. The insulating barrier according to any one of claims 1-3. The first direction is the longitudinal direction of the plate member,
The second direction is a lateral direction of the plate-shaped member,
5. The insulating barrier according to any one of claims 1-4. The plate-like member is made of synthetic resin,
6. The insulating barrier according to any one of claims 1-5. Further comprising a mounting portion integrally formed with the plate-shaped member and detachably mounted on the base,
7. The insulating barrier according to any one of claims 1-6. a plurality of primary terminals and a plurality of secondary terminals associated with each other;
a plurality of switch units that electrically connect or disconnect the primary terminals and the secondary terminals that correspond to each other;
8. The isolation barrier of any one of claims 1 to 7 provided between adjacent primary terminals and between adjacent secondary terminals associated with adjacent primary terminals;
switch. an operation unit that controls the plurality of switch units;
8. Among the plurality of primary terminals, the primary terminal adjacent to the operating portion and the secondary terminal associated with the primary terminal are provided between the operating portion and the primary terminal. and an insulating barrier according to
The switch according to claim 8.

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