Detection board mounting structure

Abstract

To make it possible to attach a detection substrate to a circuit breaker so as not to be misoriented and to attach the detection substrate to the circuit breaker without rattling.SOLUTION: A mounting structure of a rectangular detection substrate 50 fixed to a circuit breaker is provided. A plurality of mounting units 51 is provided for attaching a circuit breaker to one side of the detection substrate and a side opposite to the one side. At least one of the plurality of mounting units has a shape different from that of the other mounting unit. One side of the detection substrate and a side located on the opposite side are configured to be asymmetric.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a mounting structure for a detection board. [Background technology]

[0002] As described in Patent Document 1, it is known that a circuit breaker is provided with a detection board incorporating a leakage detection circuit and an alarm circuit. Incidentally, the board has electronic circuits such as a capacitor and input / output lines to the board, and the mounting direction of the board is determined to prevent interference with other mechanisms. In order to prevent the board from being mounted in the wrong direction during the assembly work, the board is formed into an asymmetrical uneven shape, and the base part of the circuit breaker to be mounted is also shaped to correspond to the board. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-008513 A

[0004] However, such a shape tends to require a large space for mounting the detection board, and since the board has a complex shape, it is time-consuming to consider the mounting position of the fixing part of the board so that it can be fixed without rattling. Summary of the Invention [Problem to be solved by the invention]

[0005] The inventor of the present invention has thoroughly investigated this issue and attempted to solve it. The problem to be solved by the present invention is to make it possible to attach a detection board to a circuit breaker in the correct orientation and to make it possible to attach the detection board to the circuit breaker without rattling. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides an attachment structure for a rectangular detection board that is fixed to a circuit breaker, the attachment structure for the detection board having a plurality of attachment portions for attaching the detection board to the circuit breaker on one side of the detection board and on the side opposite the side, at least one of the plurality of attachment portions having a shape different from the other attachment portions, and the one side of the detection board and the side opposite the side are asymmetrical with respect to an axis.

[0007] It is also preferable that the detection board is provided with an attachment portion formed by a notch, that the circuit breaker is provided with a base portion for fixing the fixed contact, and that the attachment portion connected to the notch is provided on a protrusion portion formed to protrude from the base portion, so that the detection board can be supported by the protrusion portion so as to have a space between the base portion and the detection board.

[0008] It is also preferable that the protrusion is formed to protrude from the rear side of the base portion, and the sub-base portion is formed to cover the detection board supported by the protrusion, so that a space can be formed between the sub-base portion and the detection board while the detection board is supported by the protrusion. Effect of the Invention

[0009] According to the present invention, it is possible to mount the detection board on the circuit breaker in the correct orientation, and also possible to mount the detection board on the circuit breaker without rattling. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a perspective view of a circuit breaker according to an embodiment. [Diagram 2] 2 is an exploded perspective view of the circuit breaker shown in FIG 1, as viewed from the front side. [Diagram 3] 2 is an exploded perspective view of the circuit breaker shown in FIG 1, as viewed from the rear side. [Figure 4] FIG. 2 is a plan view of a detection substrate in the embodiment. [Diagram 5] FIG. 2 is a perspective view of a detection substrate in the embodiment. [Figure 6] 11 is a diagram showing an example of a state before a detection board is attached to a base portion. FIG. [Figure 7] 4 is a partial enlarged view of the vicinity of a portion of the base where a detection board is attached. FIG. [Figure 8] 4 is a cross-sectional view of the vicinity of a portion where a detection board of a circuit breaker is attached. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] An embodiment of the invention will be described below. The mounting structure for the detection board 50 of this embodiment is for mounting a rectangular detection board 50 fixed to the circuit breaker 1. This mounting structure includes a plurality of mounting portions 51 for mounting the detection board 50 to the circuit breaker 1 on one side of the detection board 50 and on the side opposite the one side. At least one mounting portion 51 of the plurality of mounting portions 51 has a shape different from the other mounting portions 51, and the one side of the detection board 50 and the side opposite the one side are asymmetrical. This allows the detection board 50 to be mounted to the circuit breaker 1 in the correct orientation, and also allows the detection board 50 to be mounted to the circuit breaker 1 without rattling.

[0012] The circuit breaker 1 of the embodiment includes a base portion 11 that houses a movable contact 21, a fixed contact 22, and an operating mechanism portion 23 for operating the movable contact 21. The circuit breaker 1 also includes a cover portion 12 that covers an opening of the base portion 11 and exposes the handle. The circuit breaker 1 further includes a sub-base portion 13 that is formed on the opposite end portion of the cover portion 12 and covers the detection board 50 and wiring. As can be seen from Figures 1 to 3, the general outer shape of the circuit breaker 1 of the embodiment is formed by the base portion 11, the cover portion 12, and the sub-base portion 13.

[0013] In the mounting structure of the embodiment, the detection board 50 is fixed to the rear surface side of the base portion 11. The sub-base portion 13 is mounted to the rear surface side of the base portion 11 so as to cover the detection board 50.

[0014] As can be seen from Fig. 3 to Fig. 6, the detection board 50 attached to the circuit breaker 1 of the embodiment is formed in a rectangular shape. This makes it possible to prevent the detection board 50 from becoming large. Furthermore, the detection board 50 of the embodiment has a plurality of attachment portions 51 on two of the four sides that form a rectangle and are positioned to face each other. The detection board 50 can be supported by connecting the attachment portions 51 to a mounting portion. In the example shown in Fig. 4, the attachment portions 51 are provided on the upper and lower sides of the detection board 50, but not on the right and left sides.

[0015] If at least one of the multiple mounting parts 51 has a shape different from the other mounting parts 51 and one side of the detection board 50 and the side opposite to that side are asymmetrical, the detection board 50 cannot be attached to the mounting part in the up-down or left-right reversed orientation. Therefore, the detection board 50 can be attached only in an appropriate orientation. In the example shown in FIG. 4, the mounting part 51 provided on the right side of the upper side of the detection board 50 has a different left-right length from the other mounting parts 51.

[0016] 4, the "position" of the mounting part 51 on one side of the detection board 50 is arranged to be symmetrical with the "position" of the mounting part 51 on the side located opposite the one side. This makes it easy to adjust the position of the mounted part.

[0017] The mounting portion 51 in the example shown in FIG. 4 is a notch. Therefore, it is possible to suppress the detection board 50 from becoming large. The portion connected to the mounting portion 51 is a mounting portion provided on the protrusion portion 14 formed to protrude from the base portion 11. As can be understood from the examples shown in FIG. 6 and FIG. 7, in the embodiment, the mounting portion is a fitting portion 15 provided on the tip portion of the protrusion portion 14, and this fitting portion 15 is fitted into the notch of the detection board 50. Note that in the embodiment, a configuration is adopted in which a plurality of protrusion portions 14 protrude from the base portion 11, and the protrusion portions 14 support a portion of one side of the detection board 50 and a portion of the side located opposite to the one side. Note that, as can be understood from FIG. 7, in the embodiment, the detection board 50 is supported by sandwiching the detection board 50 between the fitting portions 15 and the fitting portions 15.

[0018] As described above, in the embodiment, the detection board 50 is supported by the multiple protrusions 14 extending from the base portion 11, and at this time, the detection board 50 can be supported so that there is a space 71 between the base portion 11 and the detection board 50 (see FIG. 8). Therefore, it is possible to suppress the transfer of heat from the base portion 11 to the detection board 50. Also, electronic circuit components and the like provided on the board can be arranged in the space 71 between the base portion 11 and the detection board 50. Even in this way, it is possible to prevent the electronic circuit components and the like from coming into contact with the base portion 11, and therefore it is possible to suppress the transfer of heat from the base portion 11 and the breakdown or deformation of the electronic circuit components and the like.

[0019] In the embodiment, the protrusions 14 are formed to protrude from the back surface side of the base portion 11, but the sub-base portion 13 is configured to cover the detection board 50 supported by the protrusions 14. This makes it possible to prevent the detection board 50 from being exposed.

[0020] Furthermore, the sub-base portion 13 of the embodiment is configured to enable a space 73 to be formed between the sub-base portion 13 and the detection board 50 in a state in which the detection board 50 is supported by the protrusions 14. This makes it possible to suppress the transfer of heat from the sub-base portion 13 side to the detection board 50.

[0021] Although the present invention has been described above by taking the embodiment as an example, the present invention is not limited to the above embodiment and can be modified in various ways. For example, the detection board can be configured to have attachment portions on three or four sides. [Explanation of symbols]

[0022] 1 Circuit Breaker 11 Base 13 Sub-base section 50 Detection board 51 Mounting part

Claims

1. A mounting structure for a rectangular detection board fixed to a circuit breaker, a detection board having a plurality of attachment portions for attachment to a circuit breaker on one side and on a side opposite to the one side; At least one of the mounting portions has a different shape than the other mounting portions; One side of the detection board and the side opposite to the one side are asymmetrical. The detector board can only be installed in the correct orientation. The detection board is provided with a mounting portion formed of a notch, A base portion is provided for fixing the fixed contact to the circuit breaker, The mounting portion connected to the notch is provided on a protrusion formed so as to protrude from the base portion, A mounting structure for a detection board, characterized in that the detection board can be supported by a protrusion so as to have a space between a base portion and the detection board.

2. The protrusion is formed so as to protrude from the rear side of the base, The sub-base portion is formed so as to cover the detection substrate supported by the protrusion portion, 2. The mounting structure for a detection board according to claim 1, wherein a space can be provided between the sub-base portion and the detection board when the detection board is supported by the protrusion.

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