Press keys for coal mine information device

Abstract

A coal mine information device press key comprises the following components: an emergent ray axis (311) on the light transmitting device (31) and a receiving ray axis (314) on the light receiving device (32); a lens part (20) which is taken as one part of the explosion-proof casing and is arranged on the upper part of the light transmitting device (31) and the light receiving device (32); and a key cap body (15) which has unique structure and is arranged at the upper side of the lens part (20), and when the key cap body (15) is at the first position, the light transmitting part (11) leads to the transmitting light to the outside of the receiving ray axis (314). The key cap body (15) at the second position when it is pressed the transmitting ray transmits into the light receiving device (32) along the receiving light axis (314) and the light receiving device (32) is accessed into the press key circuit thereby realizing the function of the press key. The structure of the press key of the invention can satisfy the requirement for preventing explosion in the electric device used in the explosive gas atmosphere.

Description

technical field [0001] The invention relates to a device for interactive input between a user and a computer, in particular to an input device for a manual switch, and in particular to a device that converts the displacement of a component into a code input through a photoelectric method, is suitable for use in an explosive gas environment, and realizes a key function. Background technique [0002] In the prior art, there are countless types of keys or keyboards composed of keys used in ordinary environments, but most of these keyboards are not suitable for use in explosive gas environments. [0003] For example, in coal mines, the buttons of some explosion-proof electrical appliances, according to the standard requirements of electrical equipment in explosive gas environments, have to make a very long button handle, which slides telescopically in the corresponding handle sleeve, and the button handle and the handle sleeve There is a gap, and the end of the handle shaft is p...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, there is no button suitable for information devices in an explosive gas environment, which is small in size, light in weight, good in touch, and meets the explosion-proof regulations. People hope to have a button and keyboard similar to those used on ordinary computers and mobile phones. Electrical equipment in a gas environment, especially on information devices, to realize man-machine dialogue input

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