JPS62190921A - Keyboard switch - Google Patents

Abstract

PURPOSE:To eliminate the need for a large-sized water-proof housing as to a noncontact type switch by arranging plural reflection type photodetection sensors on a base and constituting a keyboard switch, and providing this inside a light transmission plate. CONSTITUTION:A reflection type photodetection sensor 1 is formed by combining a light emitting element 1a and a light receiving element 1b adjacently in one body and plural sensors 1 are arranged on the base 2 to constitute the keyboard switch A. Further, this is fitted across a spacer 4 with window glass 3 as the light transmission plate out. Such a constitution eliminates the need for a housing having superior water resistance specially as the housing which contains the switch A.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a contactless switch, and more particularly to a contactless man-machine interface.

2. Description of the Related Art Conventionally, houses, automobiles, etc. have been locked to maintain their safety, and it has become mainstream to mechanically operate the lock with a key. In order to make such a safety/all-holding mechanism even safer, an electric or magnetic key is used instead of a mechanical key to operate the mechanism.

On the other hand, there are code locks that use a dial instead of a key, and with advances in electronic technology, there are also systems that operate the lock by comparing signals input from a keyboard switch with multiple switches with stored signals. It has been adopted.

Problems to be Solved by the Invention Conventional keyboard switches were installed outdoors, as shown in Figure 3, which not only caused damage due to rainwater and dust infiltration, but also caused electrical circuits, etc., to be installed on the back side. A large waterproof enclosure must be used to accommodate the
Not only was the cost high, but there were also restrictions on the mounting location.

Means for Solving the Problems The keyboard switch of the present invention is made up of a plurality of reflective light detection sensors arranged on a base. It is provided inside a translucent plate that is translucent enough to pass through.

Furthermore, the arrangement of the sensors is, for example, 10, corresponding to the decimal number.
They may be arranged in one horizontal row or one vertical row, and when a fingertip or the like is used as the object to be detected, it is convenient to set the arrangement interval to about the width of a finger.

A known electronic circuit for converting the detection signal of the optical sensor into an output signal is provided on the back side of the base on which the reflective optical sensor of the keyboard switch of the present invention is attached. For example, a circuit may be provided that compares the output signal with a pre-stored reference signal and outputs a signal for driving a lock mechanism or the like when they match.

Function The keyboard switch of the present invention is attached to the inside of a transparent plate such as a window glass, and the switch can be operated by simply touching the outside of the window glass with a finger, without touching the keyboard switch itself. This allows you to unlock the door without touching the switch.

EXAMPLES Hereinafter, examples will be further described, but the present invention is not limited to the number of ships.

In FIG. 1, ■ is a reflective light detection sensor, 2 is a base of the reflective light detection sensor 1, 3 is a transparent plate, such as a window glass, 4 is a resin spacer, and 5 is an input/output cord. It is.

The reflective light detection sensor 1 includes a light emitting element 1a and a light receiving element 1b.
For example, the Sharp Photo Interaptor (C, P2S
5, CP450F), etc., and a plurality of such photodetection sensors 1 are arranged side by side on a base 2 to constitute a keyboard switch A. Further, this keyboard switch A is attached with a window glass 3 serving as a light-transmitting plate on the outside via a spacer 4.

In this state, the light emitting element 1a of the reflective light detection sensor l
For example, when the fingertip B is brought into contact with the outer surface of the transparent plate 3 while the light emitted from the light emitting element 1a is passing through the transparent plate 3, the light passing from the light emitting element 1a is blocked by the finger IIIB. This passing light is reflected by the light-transmitting plate, that is, the window glass 3, and is received by the light-receiving element 1b.

FIG. 2 shows the keyboard switch A of the present invention attached to the inside of the glass 3' of the door 6 of an automobile J or the inside of the glass 3'' of the door 6' of an entrance/exit of a house.

Effects of the Invention The keyboard switch of the present invention is mounted on a transparent transparent plate or a semi-transparent plate that allows light to pass through, such as a windowpane, at an appropriate distance and facing outdoors. The casing that houses the keyboard switch does not need to be particularly waterproof.

[Brief explanation of drawings]

FIG. 1(a) is a front view of an example of the keyboard switch of the present invention, and FIG. 1(a) is a sectional view thereof.
FIG. 3 is a diagram showing an example in which the keyboard switch of the present invention is attached. FIG. 3 is a diagram showing how a conventional keyboard switch is installed. A...Keyboard switch, B...Finger tip, 1...
Reflective sensor, 2... Base, 3... Window glass, 4...
...Spacer, 5...I/O code.

Claims (1)

[Claims] A reflective light detecting sensor comprising a light emitting element and a light receiving element, a base on which a plurality of the reflective light detecting sensors are arranged in parallel, and a transparent light detecting sensor provided outside the plural reflective light detecting sensors. and a light plate, and when the light from the light emitting element passes through the light transmitting plate and is blocked, the light passing through the light emitting element is reflected by the light transmitting plate, and this reflected light is received by the light receiving element. keyboard switch.