RU1802378C - Keyboard - Google Patents

Description

 The invention relates to electrical engineering and can be used in information input and conversion systems, in particular in computer keyboards.

i The purpose of the invention is to provide tact while maintaining simplicity of design and reliability.

. In FIG. Figure 1 shows an example of a particular embodiment of a keyboard; in FIG. 2 the characteristic positions of the spring are selected: a J in the key located in the starting position; b - during the stroke of the key, when the spring is in the maximum tension state; c - at the end of the key stroke, when the spring view interacts with the limiter.

The keyboard contains a plate 1 with holes 2 for supporting protrusions and a pusher, electrical contacts 3 of a contact plate 4 with their drive mechanisms, each of which consists of a hollow key 5 with supporting protrusions 6 and a pusher 7 included in the corresponding holes 2 of the plate 1, a return spring in the form of a coil 8 of a spiral with straight ends 9, a fastener 10 with a supporting surface 11 for a coil 8 of a spring and an abutment 12 in the area of mating of a coil 8 with rectilinear ends 9 of a spring at a height hr above the plate 1, greater than the height of the stop thirteen ( for example, in the form of ledges) of the rectilinear ends 9 of the spring into the inner

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the surface of the key 5, but smaller than the maximum height h2 of the position of the spring straight ends 9, the limiter 14, for example, on a fastener 10 mounted to interact with the outer upper surface of the free part of the coil 8 of the spring spiral so that the internal limit angle a between the plane of the coil 8 and the plane in which the ends 9 of the spring / less than 180 ° lie.

The keyboard works as follows: when you press the key 5, it rotates around the axis formed by the edge of the holes 2 under the support protrusions 6, the ribs of the support protrusions b and the key 5 itself, while the pusher 7 abuts the contact plate 4 and closes the electrical contacts 3 ,. .-. During the rotation of the key 5 around the axis, the stop position 13 of the spring end 9, which interacts with the inner surface of the key 5, and, consequently, the spring end 9 themselves are moved down. At the same time, the opposite section, the springs, is moved upward due to rotation relative to the stop 12. When the ends 9 and the coil 8 of the spring lie in the same plane and this plane coincides with the imaginary plane passing through the stop 12 and the edge of the holes 2 under the support projections 7 (pos. b in Fig. 2) the spring force becomes maximum due to its maximum twisting, since the distance from the stop 13 of the straight ends in the key 5 to the stop 12 on the fastener 10 in this position for the spring is minimal. When the ends of the spring 9 are moved down below the imaginary plane, the spring instantly loosens, since the distance between the stop 12 and the ends 9 of the spring increases, which allows the spring to unwind. This instantaneous weakening of the spring is perceived as tactility. With further movement of the ends 9 of the spring, due to the interaction of the upper outer surface of the free part of the coil 8 of the spring with the limiter 14, the spring is deformed so that the coil 8 and the rectilinear ends 9 are no longer in the same plane, but in different angles « less than 180 ° between

With these planes (pos. in Fig. 2), the spring force acquires a component that squeezes the key 5 from the plate 1. This ensures that the key 5 returns to its original position, and the springs in it,

characterized by. and in FIG. 2.

The advantage of the keyboard is the simplicity of its assembly, the manufacturability of its parts, high uptime and ergonomics while ensuring tactility.

Claims (1)

Formula of 6 re and Keyboard containing a plate with holes, contact electrical contacts boards and their drive mechanisms, each of which consists of a hollow key with support protrusions and a pusher, which enter the holes of the plate, a return spring in the form of a spiral coil with straight ends, a fastener with a supporting surface under the spiral coil, the fastener is located between the holes under the supporting protrusions, the spiral coil abuts against the supporting surface the fastener, and the straight ends of the spring to the inner surface of the key, characterized in that, in order to ensure tactility, the drive mechanism additionally contains a stop, and on the fastener there is additional emphasis in the area of the helix of the coil with the straight ends of the spring on height above the plate, greater than the height of the stop rectilinear ends into the inner surface of the key, at least the maximum height of the position of the rectilinear ends of the spring, and the limiter is installed to interact with the outer upper surface of the free part of the coil so that the internal limit angle between the plane of the coil and the plane in which the ends of the spring lie is less than 180 °.