JPS5942737A - Gradient detecting switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tilt detection switch suitable as a sensor for detecting tilt.

Conventionally, in this type of switch, as shown in FIG.
A mercury switch 4 is used which shuts off and detects inclination.

However, the mercury switch 4 receives the electrical signal via the wire.
Since it is the 17th structure that detects with N/OFF, when used in a field where there is excessive electromagnetic noise, the shadow of magnetic noise 7Lt
'FC reception is easy, which reduces reliability as a switch.

If it is used in a trench or other location where there is a risk of explosion, safety measures must be taken, which increases costs.

The present invention was made in view of these circumstances, and includes a light receiving/emitting element 4 at one end in a container containing a liquid that reflects light.
The present invention provides an inclination detection switch that enables highly reliable detection with an extremely simple configuration in which a light guide provided with the sensor is exposed.

Hereinafter, the configuration and the like will be explained in detail with reference to embodiments shown in the drawings.

FIGS. 2 and 3 are diagrams showing an embodiment of the tilt detection switch according to the present invention. In these evils, code 1
Reference numeral 1 denotes a container, and a light-absorbing surface 12 is formed at the bottom of the container to absorb or scatter light. 13 is a liquid such as mercury that reflects light, and a portion of the container 11 is It is built in with a space 14 left. 15 is a conductive body such as an optical fiber, and a receiving/emitting element (not shown) is installed at one end.
At the other end is a focusing optical transmission section (for example, the product name "Selfoc").
) 16 is provided, and this optical transmission section 16 faces into the liquid 13 and has a reflection surface 1 on its end surface 15 caused by the liquid 13.
A T is formed. The light entering from the light emitting element side of the light guide 15 is reflected by the reflector 17 and is angled so as to reach the light receiving element 51 side. The Mapuko light guide 15 has an end surface 15a facing the light absorption surface, and a light transmission section 16.
is exposed in the space 14. Then, the structure is such that the light incident from the light emitting element side of the light guide 15 is absorbed by the light absorbing surface 12 of the seventh vessel 11.

Therefore, as shown in FIG.
The light incident from the light emitting element side advances in the axial direction of the light guide 15. Then, j'(, condensed in the transmission section 16, liquid 1
When the light is reflected by the reflecting surface 17 caused by the light transmission section 16
The light is focused and emitted to the light receiving element side of the light guide 15. On the other hand, as shown in FIG. 3, when the container 11 is tilted, the light incident from the light emitting element side of the light guide 15 travels in the axial direction of the light guide 15.

The light is then focused by the beam transmitter 16 and transmitted through the space 14 to reach the light absorption surface 12, where it is absorbed.

In the embodiment of the present invention, the light absorption surface 1 is provided at the bottom of the container 11.
2 has shown what is formed, but this issue] is this ttK
It is not limited to this, and may be formed over the entire container 11. That is, in short, any container 11 may be used as long as the light absorption surface 12 is formed at least in the portion of the container 11 that is opposed to the 5j1jt r/l 115a of the light guide 15.

In addition, in this embodiment, one light guide 15 is shown facing inside the 7I device 11 to serve as a light wave path for light emission.
As shown in FIG. 4, two light guides 19 and 20 each having the same light transmission section 18 at their tips can be used as a wave path for light emitting light; do not have. Further, although mercury is shown as the liquid 13 contained in the container 11, a colored ester liquid 11 may be used as long as it is a liquid that reflects light.

As explained above, according to the present invention, since the conductive L body having the light emitting/receiving element at one end is placed in the container overnight,
Even if it is used in a field where there is noise, highly reliable tilt detection is possible because it will not be affected by noise. Moreover, even if it is used in a place where there is a risk of explosion, it can be used safely because it does not cause sparks. I want to be safe phantom 5t
J, soil measures i, 1. The cost can be reduced to 1 Bij without the need for ff.

[Brief explanation of drawings]

2>,' 1 (i, 'J only indicates the water switch;
Showing an example of the spring eye release switch, respectively, tL through 11, ), inclination ftl fl, te's 11/r side view, 4th
The figure is also a cross-sectional view showing the tilt detection switch with another angle. 11--Container, 12--Light absorption surface, 13--
-Liquid, 15...Light guide, 15a...End surface. Patent applicant: Yamatake Honeywell Co., Ltd. Agent: Masa Yamakawa (1 other person) Figure 1 Figure 2 Figure 13 Figure 4

Claims (1)

[Claims] A container containing a liquid that totally reflects light, and a light guide having one end facing inside the container and having a receiving/emitting element 4 at the other end, at least a portion of the container where the end surfaces of the light guide face each other, A tilt detection switch characterized by forming a light absorption surface.