SU1203504A1 - Keyboard - Google Patents

Description

i

The invention relates to automation and computing, devices are assigned for data entry, for example, in communication channels, in computing, measuring and printing devices, in various automation systems and can be used in the form of computer keyboards, telegraphy, automated telephone points. control systems, etc.

The purpose of the invention is to increase the reliability of the input information, the reliability of keyboards and reduce energy consumption.

Figures 1 and 2 show a keyboard for manually entering information.

The device consists of a top panel 1 of the body made of da non-magnetic non-conductive material, keys 2 installed in horizontal and vertical rows on the panel, a mechanism for returning keys in the form of springs 3, screens 4 made of magnetically soft material in the form of glasses and fixed at the base key rods, excitation windings, consisting of 5 main and additional 6 (according to the number of keys), and each pair forms a 2-section coil of an electromagnet installed in a special recess of the panel so that the screen freely movable inside it, reading the windings 7, made in the form of coils spanning rods keys annular permanent magnets 8 mounted on the lower panel 9 of the housing. I. -.,, Depending on the application of the keyboard, the number of keys and their placement on the case may be different,

The device works as follows;

In the initial state, under the action of the elastic forces of the springs 3, all the keys 2 are in the extreme upper position, the screens 4 close the windings 7 to reach, the excitation windings are de-energized. The set of input information is carried out by pressing the appropriate keys. When you press a key, the screen, lowering down, opens the read winding into the field of action of the permanent magnet 8, after removing the key, locks the key in the lower position2035042

SRI, because the force of the spring 3 is not enough to return it. Then press the following keys. Fixing the key before entering information allows you to visually monitor the typed information.

To enter information press a special control key (in the input device

 O is not included), which for time-press connects the field windings (main and additional) to a special generator. The current flowing in the windings of the record forms a magnetic field, which excites electrical pulses entering the computer registers in the windings of the reading of the pressed keys, and, acting on the screens,

20 cores of electromagnets create enough effort to return the keys to their original position. In the windings of the schitshany, closed by screens, the signals are not induced. The automatic return of the pressed keys to the upper position after entering the information indicates their normal operation.

4Q The springs in the proposed device are operated in a lightweight mode, since their role is reduced to the function of holding the keys and glasses in the initial position. If an error is detected when checking the information typed on the keyboard, the erroneous-pressed key is returned manually.

35

When the field windings are permanently connected to the power supply, the proposed device for the input of information works similarly to the known one. Thus, the proposed device for inputting information, along with functions of lime, allows one to enter information byte-by-bye, to make a visual check of the information typed on the keyboard before entering it into registers. At the same time, a low power consumption of the device is ensured due to the short-term supply of the excitation windings, a lightweight operating mode of the return spring reduces the requirements for their characteristics and increases the service life of the device. Stability in time of magnetic characteristics

Permanent magnets provide virtually trouble-free operation of the key lock mechanisms. So

1203504,

In this way, the area of possible application of the device is greatly expanded.

Editor V. Petrash

Compiled by Bazovsky

Tehred I.Astalosh Corrector A. Obruchar

8417/51 Circulation 709Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch 1ShP Patent, Uzhgorod, st. Project, 4

2

Claims (1)

KEYBOARD, comprising a housing, · 'keys with rods and return mechanisms located • on the upper panel of the housing, screens of soft magnetic material in the form of glasses fixed on rods Figure 1 keys, the reading coil in the form of coils spanning the key rods, and the field windings covering the rods with the reading windings, field windings and reading coils are placed in the housing with the possibility of free movement of the screens between them, characterized in that, in order to increase the reliability of the input information, reliability and energy saving, it contains ring permanent magnets for fixing the keys in the lower position, located on the bottom panel of the case.