| 摘要 |
<p>PURPOSE:To prevent a wrong detecting operation, and to exactly detect a support by providing an inclination detecting means for detecting and displaying an inclination of an electrode plate against the wall surface. CONSTITUTION:On the surface of a rectangular parallelopiped-shaped housing 1 of a thin type, an electric conduction display lamp L1, an indicator lamp L2, and a marking pin 4 are provided, and in four corners of the reverse side of the housing 1, an actuator of a limit switch SW which has been provided in the housing 1 is projected. In this state, when a part where a support exists at the back of the wall surface is moved so as to follow up, the capacitance is varied due to a variation of a dielectric constant, therefore, by lighting the lamp L2 by its integral output, it is detected that the support exists. In this case, the switches SW are power source switches, and also, connected in series, respectively, therefore, only in case when the actuators of the switches SW have all been pushed in, a support detecting operation can be executed, and also, the lamp L1 is lighted. Accordingly, when the housing 1 is inclined, and the electrode plate 2 and the wall surface do not become parallel to each other, the lamp L1 is turned off, and a wrong detecting operation can be prevented.</p> |
