LINKING MECHANISM BETWEEN WATER METER AND WATER LEAK DETERMINING UNIT, AND WATER LEAK DETERMINING UNIT EMPLOYING SAID LINKING MECHANISM

摘要

[Problem] To provide a linking mechanism with which it is possible to link a water leak determining unit to a water meter in a stable condition in order to detect water leaks.[Solution] A water meter lid which covers a display screen of a water meter is formed from a transparent plate and a water meter head ring which tightens the transparent plate. The water leak determining unit comprises: a main body case inside which electric components are accommodated; a support plate disposed parallel to and facing a bottom surface of the main body case, across a gap, and which is secured to the bottom surface of the main body case across said gap by means of three leg portions which are disposed at equal angles around a vertical centerline, distal ends of the leg portions protruding from a lower surface of the support plate; a sensing portion in which the sound of water leaks is detected by bringing the distal ends of the three leg portions protruding from the support plate into contact with the transparent plate of the water meter; and a guide which is installed in the gap between the bottom surface of the main body case and the support plate, and which hangs down from the bottom surface of the main body case toward the support plate. An acceleration sensor unit is accommodated in the guide, and is positioned and secured in such a way that the acceleration sensor unit is located in the gap. A power supply unit is accommodated in the main body case and is positioned to be parallel to and above the acceleration sensor unit. A circuit board unit is positioned parallel to the power supply unit. The acceleration sensor unit, the power supply unit and the circuit board unit are each secured to the main body case. When inspecting for water leaks, the water leak determining unit is placed on the upper surface of the water meter lid, thereby linking the water leak determining unit to the water meter with the distal ends of the three leg portions making internal contact with the water meter head ring, and the water leak determining unit stands freely on the water meter in a stable condition.