Electric Device System

Abstract

Provided is an electric device system (1) that can prevent blocking of electric connection between electric device units (2). The electric device system (1) includes a first unit (2B1) and a second unit (2B2) that are of the electric device units (2) adjacent to each other. An elastically deformable first connecting terminal (40) is provided in the first unit (2B1), and a second connecting terminal (50) is provided in the second unit (2B2). When the first unit (2B1) is assembled in the second unit (2B2), the first connecting terminal (40) comes into contact with the second connecting terminal (50) after sliding on an outer surface (14) of a casing (10) of the second unit (2B2). A bulging surface (41) is provided in an exposed surface of the first connecting terminal (40), and a recess (52) is provided in an exposed surface of the second connecting terminal (50). A part of the bulging surface (41) and a part of an opening edge (52a) of the recess (52) come into press-contact with each other by fitting a part of the bulging surface (41) in the recess (52), thereby establishing electric conduction between the first connecting terminal (40) and the second connecting terminal (50).

Description

technical field [0001] The present invention relates to an electrical equipment system composed of a plurality of electrical equipment units. Background technique [0002] Conventionally, there are various types of electrical equipment systems constituted by a plurality of electrical equipment units. As one of them, there is known an electrical equipment system including a plurality of electrical equipment units arranged in a predetermined direction and electrically connected to each other. As a representative example of the electric equipment system of this structure, the remote terminal apparatus of a programmable logic controller (PLC) (it abbreviates simply as a remote terminal apparatus hereafter) is mentioned. [0003] The remote terminal device includes a communication unit and one or more I / O units (input and output units) capable of communicating with the communication unit via a serial bus and a one-way communication line respectively. The above-mentioned communic...

AI Technical Summary

Problems solved by technology

[0012] However, in the case of such constitution, when one of a pair of electrical equipment units is assembled on the other, the connection terminal of the one protruding from the outer surface of the electrical equipment unit slides on the outer surface of the other electrical equipment unit. Therefore, when sliding, there is a risk that the connection terminal will bring in foreign matter such as dust adhering to the casing or cutting chips generated by cutting a part of the surface of the casing will be brought in as foreign matter.

In this case, in the state where one of the pair of electrical equipment units has been assembled to the other, the first connection terminal and the second connection terminal are cut off due to the foreign matter entering between the first connection terminal and the second connection terminal. Conduction between connection terminals, which can cause communication errors

[0013] In addition, in the state where one of a pair of electrical equipment units is assembled on the other, if the foreign matter does not enter between the first connection terminal and the second connection terminal, since the foreign matter is located between the first connection terminal and the second connection terminal, In the vicinity of the contact point of the second connection terminal, when an impact is applied to the electrical equipment unit from the outside, the relative position between the first connection terminal and the second connection terminal changes, and there is also a possibility that this foreign matter enters the first connection terminal and the second connection terminal. In the case of connection terminals, in this case, the conduction between the first connection terminal and the second connection terminal will be cut off, which will cause a communication error.

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