JP2021064589A - Insulation barrier and switch - Google Patents

Abstract

To provide an insulation barrier in which the contact with peripheral members due to deformation is prevented and an installation process is simple, and a switch having the same.SOLUTION: An insulation barrier 26a includes an insulating plate member 30 having a plurality of first concave-convex portions 31 that are convex portions on one main surface 30a and concave portions on the other main surface 30b, and a plurality of second concave-convex portions 32 that are concave portions on the main surface 30a and convex portions on the main surface 30b. The plurality of first concave and convex portions 31 and the plurality of second concave and convex portions 32 are disposed along each of a first direction along a side facing a base at the main surface 30a and a second direction intersecting the first direction at the main surface 30a. An arrangement of the first and second concave-convex portions 31, 32 along the first direction is different from an arrangement of the first and second concave-convex portions 31, 32 along the second direction.SELECTED DRAWING: Figure 4

Description

The present invention relates to an insulating barrier and a switch provided with an insulating barrier.

For switches, disconnectors, circuit breakers, etc., the terminals corresponding to each phase of three-phase AC are insulated from each other to prevent small animals such as mice and snakes from entering the switch and short-circuiting the terminals. Some are equipped with an insulating barrier for the purpose. Patent Document 1 discloses a switch having this kind of insulating barrier.

Japanese Unexamined Patent Publication No. 6-139884

When a small animal collides with an insulating barrier provided in a switch, disconnector, circuit breaker, etc., the insulating 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 comes into contact with surrounding members, for example, terminals to which a high voltage is applied, which may cause a switch, a disconnector, or the like to fail. is there. In order to suppress such deformation, the insulating barrier is formed of a highly rigid laminated plate. When forming an insulating barrier with a laminated plate having high rigidity, a mounting member for mounting the insulating barrier formed by cutting out from the original plate to a base to which terminals are fixed is required. Specifically, as disclosed in Patent Document 1, a plurality of mounting members are provided along the side surface of the insulating barrier. If the position where multiple mounting members are mounted on the base differs from the design position due to variations in the dimensions of components such as switches, disconnectors, and circuit breakers, the position for fixing the mounting members to the insulating barrier and the shape of the mounting members. Etc., and the process of attaching the insulating barrier to the base becomes complicated.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a switch having an insulating barrier, which is prevented from coming into contact with surrounding members due to deformation and has a simple mounting process, and an insulating barrier. To do.

In order to achieve the above object, the insulating barrier according to the present invention is an insulating barrier attached to the base at a position adjacent to the terminal fixed to the base, and is a convex portion of one of the main surfaces. Insulating property having a plurality of first uneven portions which are concave portions of the other main surface and a plurality of second uneven portions which are concave portions of one main surface and which are convex portions of the other main surface. It is provided with a plate-shaped member. The plate-like member is attached to the base with one main surface or the other main surface adjacent to the terminal and the sides facing the base. The plurality of first concavo-convex portions and the plurality of second concavo-convex portions are in the first direction along the side surface facing the base on one main surface and in the second direction intersecting the first direction on one main surface, respectively. Placed along. The arrangement of the first concavo-convex portion and the second concavo-convex portion along the first direction is different from the arrangement of the first concavo-convex portion and the second concavo-convex portion along the second direction. The flexural rigidity of the plate-shaped member in the first direction is lower than the flexural rigidity of the plate-shaped 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 the flat plate, so that the plate-shaped member comes into contact with surrounding members due to deformation. 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 with the first direction, even if the position where the plate-shaped member is attached to the base is displaced, the plate The mounting process is simple because the shaped member can be bent and mounted on the base.

Circuit diagram of the switch according to the first embodiment of the present invention Perspective view of the switch according to the first embodiment Front view of the switch according to the first embodiment Perspective view of the insulating barrier according to the first embodiment Cross-sectional view taken along the line AA of FIG. 4 of the insulating barrier according to the first embodiment. Cross-sectional view taken along the line BB of FIG. 4 of the insulating barrier according to the first embodiment. Cross-sectional view taken along the line CC of FIG. 4 of the insulating barrier according to the first embodiment. Perspective view of the insulation barrier according to the second embodiment of the present invention. FIG. 8 is a cross-sectional view taken along the line DD of FIG. 8 of the insulating barrier according to the second embodiment. FIG. 8 is a cross-sectional view taken along the line EE of the insulating barrier according to the second embodiment.

Hereinafter, the insulating barrier and the switch according to the embodiment of the present invention will be described in detail with reference to the drawings. In the figure, the same or equivalent parts are designated by the same reference numerals.

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

As shown in the circuit diagram shown in FIG. 1, the switch 1 has primary terminals 11a, 11b, 11c and secondary terminals 12a, 12b, 12c corresponding to each phase of three-phase alternating current, and the corresponding primary terminals 11a, 11b, respectively. , 11c and the secondary terminals 12a, 12b, 12c are provided with switch portions 13a, 13b, 13c for electrically connecting or disconnecting the 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. It comprises a possible movable contact 16a and a movable contact 17a that can move between a position in contact with the main contact 15a and a position separated from the main contact 15a.

Similarly, the switch portion 13b has an auxiliary contact 14b and a main contact 15b connected to the primary terminal 11b, a position where the auxiliary contact 14b is in contact with the auxiliary contact 14b, and a position where the auxiliary contact 14b is separated from the auxiliary contact 14b. A movable contact 16b that can move between the movable contacts 16b and a movable contact 17b that can move between a position in contact with the main contact 15b and a position separated from the main contact 15b are provided.

Similarly, the switch unit 13c has an auxiliary contact 14c and a main contact 15c connected to the primary terminal 11c, a position in contact with the auxiliary contact 14c, and a position separated from the auxiliary contact 14c. It includes a movable contact 16c that can move between them, and a movable contact 17c that can move between a position that is in contact with the main contact 15c and a position that is separated from the main contact 15c.

Further, in the switch 1, one end is connected to the movable contacts 16a and 17a and the other end is connected to the secondary terminal 12a, and one end is connected to the movable contacts 16b and 17b and the other end is the secondary. 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.

Further, as shown in FIGS. 2 and 3, the switch 1 includes an arc extinguishing chamber 21a, 21b, 21c, a plate-shaped base 22, and a plate-shaped base 22, respectively, for extinguishing an arc generated when the switch portions 13a, 13b, 13c are opened. It includes arms 23a, 23b, 23c that rotate around one end, an operation unit 24 that rotates the arms 23a, 23b, 23c, and a bar 25 to which one ends of the arms 23a, 23b, 23c are attached.

Further, the switch 1 includes an insulating barrier 26a located between the adjacent primary terminal 11a and the primary terminal 11b and between the adjacent secondary terminal 12a and the secondary terminal 12b, and the adjacent primary terminal 11b and the primary terminal 11c. An insulating barrier 26b located between and between the secondary terminal 12b and the adjacent secondary terminal 12c is provided. The switch 1 is located between the insulating barrier 26c provided at a position where the primary terminal 11a and the secondary terminal 12a are sandwiched between the insulating barrier 26a, the primary terminal 11c and the secondary terminal 12c, and the operation unit 24. It is preferable to provide an insulating barrier 26d and the like.

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

The primary terminals 11a, 11b, and 11c are attached to the base 22 and connected to the corresponding output terminals of the three-phase AC power supply, respectively. The secondary terminals 12a, 12b, and 12c are attached to the base 22 and connected to the corresponding input terminals of the load, respectively. In the first embodiment, the primary terminal 11a and the secondary terminal 12a are attached to the base 22 at intervals along the Z-axis direction. Similarly, the primary terminal 11b and the secondary terminal 12b are attached to the base 22 at intervals along the Z-axis direction. Similarly, the primary terminal 11c and the secondary terminal 12c are attached to the base 22 at intervals along the Z-axis direction.

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.

The movable contacts 16a, 16b, 16c are attached to the arms 23a, 23b, 23c, respectively. Specifically, the movable contacts 16a, 16b, 16c are attached to the ends opposite to one end that is the center of rotation of the arms 23a, 23b, 23c, respectively. By rotating the arms 23a, 23b, 23c, the movable contacts 16a, 16b, 16c are separated from the positions in contact with the auxiliary contacts 14a, 14b, 14c and the auxiliary contacts 14a, 14b, 14c, respectively. Move between and where you are.

Similarly, the movable contacts 17a, 17b, 17c are attached to the arms 23a, 23b, 23c, respectively. Specifically, the movable contacts 17a, 17b, 17c are attached to the ends opposite to one end that is the center of rotation of the arms 23a, 23b, 23c, respectively. By rotating the arms 23a, 23b, 23c, the movable contacts 17a, 17b, 17c are separated from the positions in contact with the main contacts 15a, 15b, 15c and the main contacts 15a, 15b, 15c, respectively. Move between and where you are.

When the switch portions 13a, 13b, 13c are closed, the movable contacts 16a, 16b, 16c come into contact with the auxiliary contacts 14a, 14b, 14c, respectively, and then the movable contacts 17a, 17b, 17c are mainly used. Movable contacts 16a, 16b, 16c are attached to the arms 23a, 23b, 23c, respectively, at positions where they can come into contact with the contacts 15a, 15b, 15c, and the movable contacts 17a, 17b, 17c, respectively. It is attached to the arms 23a, 23b, 23c.

The fuses 18a, 18b, 18c are attached to the arms 23a, 23b, 23c, respectively. Further, the fuses 18a, 18b, 18c are blown when an overcurrent flows to cut off the circuit, respectively, and the primary terminals 11a, 11b, 11c and the secondary terminals 12a, 12b, 12c are electrically separated from each other.

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

The base 22 is made of a highly rigid member, for example metal. The arms 23a, 23b, 23c are, for example, plate-shaped or rod-shaped members, and rotate about the X-axis around a point fixed to the bar 25. The operation unit 24 rotates the arms 23a, 23b, 23c by rotating the bar 25 in response to an external signal, an operation on the operation unit 24, etc., and controls the switch units 13a, 13b, 13c, that is, The switches 13a, 13b, 13c are opened and closed. The bar 25 extends along the X-axis, is connected to the operating unit 24, and is rotated by the operating unit 24.

The insulation barrier 26a is located between the primary terminal 11a and the primary terminal 11b and between the secondary terminal 12a and the secondary terminal 12b. Specifically, the insulating barrier 26a is attached to the base 22 at a position where one main surface is adjacent to the primary terminal 11b and the secondary terminal 12b and the other main surface is adjacent to the primary terminal 11a and the secondary terminal 12a. The distance between the insulating barrier 26a and the primary terminals 11a, 11b and the secondary terminals 12a, 12b is determined by the size, structure, and the like of the switch 1, and is, for example, several tens of millimeters. By providing the insulating barrier 26a, small animals such as mice and snakes come into contact with the primary terminal 11a and the primary terminal 11b, or the secondary terminal 12a and the secondary terminal 12b, and a short circuit occurs between each phase of the three-phase alternating current. Is suppressed.

Similarly, the insulation barrier 26b is located between the primary terminal 11b and the primary terminal 11c and between the secondary terminal 12b and the secondary terminal 12c. Specifically, the insulating barrier 26b is attached to the base 22 at a position where one main surface is adjacent to the primary terminal 11c and the secondary terminal 12c and the other main surface is adjacent to the primary terminal 11b and the secondary terminal 12b. As in the case of the insulating barrier 26a, the distance between the insulating barrier 26b and each of the primary terminals 11b, 11c and the secondary terminals 12b, 12c is determined by the size, structure, etc. of the switch 1, and is, for example, several tens of millimeters. is there. By providing the insulating barrier 26b, it is possible to prevent a short circuit from occurring between each phase of the three-phase alternating current.

The insulating barrier 26c is located so as to sandwich the primary terminal 11a and the secondary terminal 12a with the insulating barrier 26a. Specifically, the insulating barrier 26c is attached to the base 22 at a position where one main surface is adjacent to the primary terminal 11a and the secondary terminal 12a. Similar to the case of the insulating barrier 26a, the distance between the insulating 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, it is possible to prevent small animals such as mice and snakes from coming into contact with the housing accommodating the switch 1 and the primary terminal 11a or the secondary terminal 12a to cause a ground fault.

The insulation barrier 26d is located between the primary terminal 11c and the secondary terminal 12c and the operation unit 24. Specifically, the insulating barrier 26d is attached to the base 22 at a position where one main surface is adjacent to the operating unit 24 and the other main surface is adjacent to the primary terminal 11c and the secondary terminal 12c. Similar to the case of the insulating barrier 26a, the distance between the insulating 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, it is possible to prevent a ground fault from occurring between the primary terminal 11c or the secondary terminal 12c and the operation unit 24.

Insulation barriers 26a, 26b, 26c, 26d are deformed and come into contact with surrounding members when small animals come into contact with the insulation barriers 26a, 26b, 26c, 26d, and the switch 1 is prevented from breaking down. 26a, 26b, 26c, 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 so as not to be deformed by contact with a small animal. The flexural rigidity in the Y-axis direction indicates the difficulty of 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 harder it is to bend.

Further, 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 exactly aligned in the Z-axis direction. Even in such a case, the flexural rigidity of the insulating barriers 26a, 26b, 26c, 26d in the Z-axis direction is such that the insulating barriers 26a, 26b, 26c, 26d can be attached to the base 22. Lower than rigidity. The flexural rigidity in the Z-axis direction indicates the difficulty of bending deformation of the insulating 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 structures of the insulating barriers 26a, 26b, 26c, and 26d are the same, the structure of the insulating barrier 26a will be described.

In the first embodiment, the insulating barrier 26a attaches an insulating plate-shaped member 30 whose longitudinal direction is along the Z-axis and whose lateral direction is along the Y-axis, and the plate-shaped member 30 to the base 22. The mounting portions 33 and 34 of the above are provided. The plate-shaped member 30 is preferably made of synthetic resin. Further, it is preferable that the plate-shaped member 30 and the mounting portions 33 and 34 are integrally formed.

As shown in FIG. 4, the plate-shaped member 30 has a plurality of first uneven portions 31 which are convex portions of one main surface 30a and recesses of the other main surface 30b, and concave portions of the main surface 30a. It also includes a plurality of second uneven portions 32, which are convex portions of the main surface 30b.

The length of the convex portion of the first concave-convex portion 31 and the concave portion of the second concave-convex portion 32 in the X-axis direction is determined according to the bending rigidity required for the plate-shaped member 30. For example, the length of the convex portion of the first uneven portion 31 and the concave portion of the second uneven portion 32 in the X-axis direction is several millimeters.

The plurality of first concavo-convex portions 31 and the plurality of second concavo-convex portions 32 have a main surface 30a in a first direction along a side surface of the plate-shaped member 30 facing the base 22, that is, a Z-axis direction, and a main surface 30a. It is arranged along the second direction intersecting the first direction, that is, along the Y-axis direction. In the first embodiment, the first concavo-convex portion 31 and the second concavo-convex portion 32 are arranged in a V shape on the YZ plane, respectively. Therefore, the arrangement of the first uneven portion 31 and the second uneven portion 32 along the first direction is different from the arrangement of the first uneven portion 31 and the second uneven portion 32 along the second direction.

Specifically, the first concavo-convex portion 31 and the second concavo-convex portion 32 are alternately arranged in equal numbers along the first direction. For example, as shown in FIG. 5, which is a cross-sectional view taken along the line AA of FIG. 4, the first concavo-convex portion 31 and the second concavo-convex portion 32 are alternately arranged side by side in the Z-axis direction. ..

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

The flexural rigidity in the first direction, which is the direction in which the same number of the first uneven portion 31 and the second uneven portion 32 are alternately arranged, is such that the first uneven portion 31 and the second uneven portion 32 are continuous by a different number. Is lower than the flexural rigidity in the second direction, which is the direction in which and are alternately arranged.

The shape of the cross section parallel to at least one of the main surfaces 30a of the plurality of first uneven portions 31 is a regular hexagon. Specifically, the shape of the cross section parallel to the main surface 30a of the first concavo-convex portion 31 excluding the first concavo-convex portion 31 located at the end in the Z-axis direction and the end in the Y-axis direction is a regular hexagon.

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

The mounting portion 33 has a shape of being inserted into and locked into a slit (not shown) formed in the base 22. The mounting portion 34 has a clip-like shape that fits into a protrusion (not shown) formed on the base 22. The insulating barrier 26a is attached to the base 22 by inserting the attachment portion 33 into the slit of the base 22 and then fitting the attachment portion 33 into the protrusion of the base 22 by 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 design positions. For example, the slits and protrusions of the base 22 may be arranged side by side along the Z axis by design, whereas the slits and protrusions of the actual base 22 may not be lined up along the Z axis. Even in such a case, the mounting portion 30 is bent by bending the plate-shaped member 30 in a state where the mounting portion 33 of the insulating barrier 26a is inserted into the slit and locked in the slit without adjusting the positions of the mounting portions 33 and 34. The insulating barrier 26a can be attached to the base 22 by fitting the 34 to the protrusion.

As described above, since the plate-shaped member 30 included in each of the insulating barriers 26a, 26b, 26c, and 26d according to the first embodiment has a plurality of first uneven portions 31 and a plurality of second uneven portions 32, it is a flat plate. Higher rigidity. As a result, for example, the insulating barriers 26a, 26b, 26c, and 26d are deformed by the collision of small animals, and contact with surrounding members is suppressed. By making the bending rigidity of the plate-shaped member 30 in the Z-axis direction lower than the bending rigidity of the plate-shaped member 30 in the Y-axis direction, even if the positions where the insulating barriers 26a, 26b, 26c, and 26d are attached to the base 22 are displaced. Since the plate-shaped member 30 can be bent and attached to the base 22, the attachment process of the insulating barriers 26a, 26b, 26c, and 26d is simple.

When the plate-shaped member 30 and the mounting portions 33 and 34 are integrally molded using a mold, the manufacturing process of the insulating barriers 26a, 26b, 26c and 26d is simple. Further, by displaying the precautions for use on the main surface 30a or the main surface 30b of the plate-shaped member 30, the mold can be attached with a sticker indicating the precautions for use after manufacturing, stamped, etc. It is no longer necessary, and the manufacturing process of the insulating barriers 26a, 26b, 26c, and 26d is simple.

(Embodiment 2)
The structure of the plate-shaped 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 bending rigidity in the first direction and the second direction. A plate-shaped member 30 having a shape different from that of the plate-shaped member 30 according to the first embodiment will be described in the second embodiment.

The plate-shaped member 30 according to the second embodiment differs from the plate-shaped member 30 according to the first embodiment in the arrangement of the first uneven portion 31 and the second uneven portion 32. The plurality of first concavo-convex portions 31 and the plurality of second concavo-convex portions 32 have a main surface 30a in a first direction along a side surface of the plate-shaped member 30 facing the base 22, that is, a Z-axis direction, and a main surface 30a. It is arranged along the second direction intersecting the first direction, that is, along the Y-axis direction. As shown in FIG. 8, the first concavo-convex portion 31 and the second concavo-convex portion 32 are arranged in a zigzag along the Y-axis direction, respectively. Therefore, the arrangement of the first uneven portion 31 and the second uneven portion 32 along the first direction is different from the arrangement of the first uneven portion 31 and the second uneven portion 32 along the second direction.

Specifically, the first concavo-convex portion 31 and the second concavo-convex portion 32 are alternately arranged in equal numbers along the first direction, as in the first embodiment. The cross section along the first direction is the same as in FIG.

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

The flexural rigidity in the first direction, which is the direction in which the first uneven portion 31 and the second uneven portion 32 are alternately arranged in equal numbers, is such that the first uneven portion 31 or the second uneven portion 32 is continuously arranged. It is lower than the bending rigidity in the second direction, which is the direction in which it is present.

As described above, in the plate-shaped member 30 provided in each of the insulating barriers 26a, 26b, 26c, and 26d according to the second embodiment, the same number of first uneven portions 31 are alternately arranged in the first direction, and the second The first uneven portion 31 or the second uneven portion 32 is continuously arranged in a zigzag manner in the direction. As a result, the rigidity of the plate-shaped member 30 is higher than that of the flat plate, so that the insulating barriers 26a, 26b, 26c, and 26d are deformed by the collision of small animals, for example, and contact with surrounding members is suppressed. By making the bending rigidity of the plate-shaped member 30 in the Z-axis direction lower than the bending rigidity of the plate-shaped member 30 in the Y-axis direction, even if the positions where the insulating barriers 26a, 26b, 26c, and 26d are attached to the base 22 are displaced. Since the plate-shaped member 30 can be bent and attached to the base 22, the attachment process of the insulating barriers 26a, 26b, 26c, and 26d is simple.

The shape of the cross section of the first concavo-convex portion 31 and the second concavo-convex portion 32 parallel to the main surface 30a is not limited to a hexagon and is arbitrary. As an example, the shape of the cross section of the first concavo-convex portion 31 and the second concavo-convex portion 32 parallel to the main surface 30a may be an arbitrary polygonal shape, a circular shape, an elliptical shape, or the like.

The length of the convex portion of the first concave-convex portion 31 and the concave portion of the second concave-convex portion 32 in the X-axis direction is not limited to the above example, and can be arbitrarily determined according to the bending rigidity required for the plate-shaped member 30. .. The length of the convex portion of the first uneven portion 31 in the X-axis direction may be different from the length of the convex portion of the other first concave-convex portion 31 in the X-axis direction. Similarly, the length of the concave portion of a part of the second uneven portion 32 in the X-axis direction may be different from the length of the concave portion of the other second uneven portion 32 in the X-axis direction. Further, the length of the convex portion of the first uneven portion 31 in the X-axis direction and the length of the concave portion of the second concave-convex portion 32 in the X-axis direction may be different values.

Further, a flat surface may be used between the two adjacent first uneven portions 31, the adjacent two second uneven portions 32, or the adjacent first uneven portion 31 and the second uneven portion 32.

The arrangement of the first concavo-convex portion 31 and the second concavo-convex portion 32 is not limited to the above-mentioned example, and if the bending rigidity of the plate-shaped member 30 in the first direction and the bending rigidity in the second direction are different, the first concavo-convex portion 31 And the second uneven portion 32 can be arranged at arbitrary positions. As an example, the first uneven portion 31 or the second uneven portion 32 may be arranged in a row 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, for example, snap-fitting.

The shapes of the mounting portions 33 and 34 are not limited to the above examples, and are arbitrary shapes in which the plate-shaped member 30 can be mounted on the base 22. As an example, the mounting portions 33 and 34 are both plate-shaped protrusions, and may be fitted to each of the two slits formed in the base 22. Further, the insulating barriers 26a, 26b, 26c, 26d may have a shape for mounting the plate-shaped member 30 to the base 22 in addition to the mounting portions 33, 34.

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

The structure of the switch 1 provided with the insulating barriers 26a, 26b, 26c, and 26d is not limited to the above example, and is arbitrary as long as the load is electrically connected to or disconnected from the power source. As an example, a resistor may be provided in the electric circuit connecting each of the movable contacts 17a, 17b, 17c and the fuses 18a, 18b, 18c. The switch 1 includes a disconnector, a circuit breaker, and the like.

1 Switch, 11a, 11b, 11c Primary terminal, 12a, 12b, 12c Secondary terminal, 13a, 13b, 13c Switch part, 14a, 14b, 14c Auxiliary contactor, 15a, 15b, 15c Main contactor, 16a, 16b , 16c, 17a, 17b, 17c Movable contacts, 18a, 18b, 18c fuses, 21a, 21b, 21c arc extinguishing chambers, 22 bases, 23a, 23b, 23c arms, 24 controls, 25 bars, 26a, 26b, 26c , 26d Insulation barrier, 30 plate-shaped member, 30a, 30b main surface, 31 first uneven part, 32 second uneven part, 33, 34 mounting part.

Claims (9)

An insulating barrier that is attached to the base at a position adjacent to the terminals fixed to the base.
A plurality of first concavo-convex portions that are convex portions of one main surface and recesses of the other main surface, and concave portions of the one main surface and convex portions of the other main surface. An insulating plate-like member having a plurality of second uneven portions, which is
The plate-like member is attached to the base with the one main surface or the other main surface adjacent to the terminal and the side surfaces facing the base.
The plurality of first concavo-convex portions and the plurality of second concavo-convex portions intersect in a first direction along the side surface facing the base on one of the main surfaces and in the first direction on the one main surface. Arranged along each of the second directions to
The arrangement of the first concavo-convex portion and the second concavo-convex portion along the first direction is different from the arrangement of the first concavo-convex portion and the second concavo-convex portion along the second direction.
The flexural rigidity of the plate-shaped member in the first direction is lower than the flexural rigidity of the plate-shaped member in the second direction.
Insulation barrier. Along the first direction, the first concavo-convex portion and the second concavo-convex portion are alternately arranged in equal numbers.
The insulating barrier according to claim 1. Along the second direction, the first concavo-convex portions and the second concavo-convex portions that are continuous in different numbers are alternately arranged.
The insulating barrier according to claim 1 or 2. The first concavo-convex portion or the second concavo-convex portion is continuously arranged along the second direction.
The insulating barrier according to any one of claims 1 to 3. The first direction is the longitudinal direction of the plate-shaped member, and is
The second direction is the lateral direction of the plate-shaped member.
The insulating barrier according to any one of claims 1 to 4. The plate-shaped member is made of synthetic resin.
The insulating barrier according to any one of claims 1 to 5. A mounting portion that is integrally formed with the plate-shaped member and is detachably attached to the base is further provided.
The insulating barrier according to any one of claims 1 to 6. Multiple primary terminals and multiple secondary terminals associated with each other,
A plurality of switch units that electrically connect or disconnect the primary terminal and the secondary terminal corresponding to each other.
The insulating barrier according to any one of claims 1 to 7, which is provided between the plurality of adjacent primary terminals and between the adjacent secondary terminals associated with the plurality of adjacent primary terminals.
A switch equipped with. An operation unit that controls the plurality of switch units and
Of the plurality of primary terminals, any one of claims 1 to 7 provided between the primary terminal adjacent to the operation unit and the secondary terminal associated with the primary terminal and the operation unit. Further equipped with the insulating barriers described in.
The switch according to claim 8.

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