CN201294508Y - Touch type peripheral key for avigation - Google Patents

Abstract

The utility model relates to a touching type neighboring key used for aviation, which comprises an outer shell, a touching substrate, an illumination light guide plate and a lining plate, and the resistance type touching substrate plays the switching function. The touching substrate, the illumination light guide plate and the lining plate are orderly overlapped, which are arranged under a window of the outer shell or are inlaid in the window. Signs of numbers, letters, characters or figures, which express the functions of control keys, are printed on the internal surface of the touching substrate, the signs can be directly observed during daytime, and the illumination is supplied for observing the signs by the illumination light guide plate. The light source of the illumination light guide plate can be an electric incandescent lamp or a semiconductor photodiode.

Description

A kind of aviation is with touch peripheral key

Technical field

The utility model relates to a kind of aviation with touch peripheral key, and this periphery key can be used for the work control of avionic device.

Background technology

The peripheral key that now a lot of air equipments generally use all is to be made of light source, light guide plate, circuit board, contact spring, keycap and housing, its structure more complicated, the work of operating key is subjected to the influence of ambient temperature, humidity and humidity big, loose contact, the relatively poor problem of control reliability appear in contact spring corrosion easily.

Summary of the invention

In order to overcome the deficiency of existing peripheral key, the switch that the utility model adopts the resistive touch substrate to do " connect, disconnect " constitutes operating key, thereby realizes the function of operating key.

The technical scheme that its technical problem that solves the utility model adopts is: at the keycap the window's position with common peripheral key same structure shell the touch substrate is housed, this touch substrate has double-layer films or thin glass, this two-layer inner surface respectively scribbles layer of transparent oxidized metal (transparent conductive resistance) conductive layer, has the transparent isolating points of many tiny (less than 1/1000 inches) that they are separated insulation between two conductive layers.When not having the pressure of hand, two conductive layers are " disconnections "; When finger contact substrate, a contact point appears in the two conductive layers of substrate, and resistance changes.This resistance promptly forms the two states of operating key " connection " and " disconnection " from large to small, and this state variation is delivered to control circuit by the lead-in wire of two conductive electrodes.

The beneficial effects of the utility model are, realize " connection " and " disconnection " of operating key without contact spring, and are simple in structure, reliable operation.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.Fig. 1 and Fig. 2 are respectively two kinds of possible structural representations.

In Fig. 1 and Fig. 2, the 1-shell, 2-touches substrate, the 3-light guide plate of throwing light on, 4-liner plate, 5-operating key window.Omitted the schematic diagram of conductive layer lead-in wire in the drawings.

Embodiment

In Fig. 1, touch substrate 2, illumination light guide plate 3, liner plate 4 is placed on the bottom of shell, and touching between substrate 2 and the shell is operating key window 5.

In Fig. 2, touch substrate 2, illumination light guide plate 3 is embedded in the operating key window 5 of shell formation, and liner plate 4 is placed on bottom, touches the skin of substrate 2 and the outer surface of shell and becomes a plane.

When the formation of the peripheral key of reality, the inner surface that touches substrate 2 is printed with the sign of numeral, letter, literal or the figure of this operating key function of expression, and these are identified at daytime can direct viewing, and provide the illumination of watching sign by illumination light guide plate 3 evening.The light source of light guide plate 3 can be incandescent lamp or semiconductor light-emitting-diode.

Claims (2)

1, a kind of aviation has shell with touch peripheral key, touches substrate, the illumination light guide plate, and liner plate is formed, and it is characterized in that: what play on-off action is the resistive touch substrate.

2, aviation according to claim 1 is characterized in that with touch peripheral key: touch substrate, and the illumination light guide plate, liner plate stacks successively, is placed under the shell window or is embedded in the window.

Images