JPS6314181U

JPS6314181U -

Info

Publication number: JPS6314181U
Application number: JP10861786U
Authority: JP
Priority date: 1986-07-15
Filing date: 1986-07-15
Publication date: 1988-01-29

Description

[Brief explanation of drawings]

第１図乃至第３図は本考案の一実施例を示すも
ので、第１図ａは外観斜視図、ｂは背面より見た
斜視図、第２図ａはケース内の部品配置を示す概
略平面図、ｂはプリント基板上の回路配置を示す
概略平面図、第３図は回路図であり、第４図ａ，
ｂは従来例の原理説明図である。１……ケース、２……背板、３……誘電体検出
回路、４……金属検出回路、５……電力線検出回
路、６ａ，６ｂ，６ｃ……表示器、７……切替ス
イツチ、Ａ_１，Ａ_２……導体板、Ｔ_１……高周波
トランス、Ｌ_１……低周波コイル。 Figures 1 to 3 show one embodiment of the present invention; Figure 1a is an external perspective view, Figure 2b is a perspective view from the back, and Figure 2a is a schematic diagram showing the arrangement of parts inside the case. A plan view, b is a schematic plan view showing the circuit arrangement on the printed circuit board, FIG. 3 is a circuit diagram, and FIGS.
b is a diagram explaining the principle of a conventional example. 1... Case, 2... Back plate, 3... Dielectric detection circuit, 4... Metal detection circuit, 5... Power line detection circuit, 6a, 6b, 6c... Display, 7... Changeover switch, A ₁ , _A2 ...Conductor plate, _T1 ...High frequency transformer, _L1 ...Low frequency coil.

Claims

[Scope of Claim for Utility Model Registration] (1) A dielectric detection circuit that detects changes in permittivity based on the capacitance between two conductive plates arranged in the same plane close to the back plate of the case, and a back plate. A metal detection circuit that detects metal by changing the mutual inductance of a high-frequency transformer placed with the end face of the core facing the plate, and a power line detection circuit that detects the magnetic field of the power line using a low-frequency coil placed with the side surface close to the back plate. An in-wall detector that houses a circuit inside a case and is equipped with a display that displays each detection output on the surface of the case. (2) A wall according to claim 1 of the utility model registration claim, in which a high-frequency transformer and a low-frequency coil are arranged along the center line between both conductor plates, and the low-frequency coil is arranged at right angles to the center line. Internal detector.