SU1424065A1 - Actuating torque drive of key cell - Google Patents

Abstract

The invention relates to electrical engineering and can be used in information input units of electronic computing devices as an actuator of an actuating element of a keycell. The purpose of the invention is to improve reliability, durability and manufacturability. In the device, the spring 5 rests on the actuator 7 and the rocker arm 4. The free arm of the rocker arm 4 at the working stroke of the key interacts with the case support 6. This changes the angle of the rocker arm towards the force-directed ejection of the spring 5, which instantly bends, resulting in element occupies another stable position. 4 il.

Description

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Yu

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05 JV

The invention relates to electrical engineering and can be used, in particular, in input units for information of various electronic computing devices as an actuator of the actuating element of the keycell.

The aim of the invention is to increase reliability and durability, as well as improving manufacturability.

FIG. Figures 1–4 show the structure and kinematic interaction of the elements of the proposed keyboard cell.

The actuator contains a key 1 fixed in the hinge 2 on the prismatic support 3 of the key 4 of the rocker, the cylindrical twisted spring 5, the housing 6, the actuating element, for example, a contact plate 7 having the ability to rotate around the conventional axis 8. Spring 5 rests with one end into the bearing surface of the rocker 4, and the other against the bearing surface of the actuating element 7.

Pressing the key 1 (Fig. 2) decreases the distance between the support surfaces of the rocker arm 4 and the contact plate 7, as a result of which the spring 5 is compressed between the parallel support surfaces of the rocker arm 4 and the plate 7, ensuring a stable state of the spring 5.

Upon further movement of the key 1 (Fig. 3 and 4), the yoke 4, having touched the stop 6, starts turning around the hinge 2, forcibly creating the angle of inclination necessary for the loss of stability of the spring 5. When the yoke 4 reaches a certain angle critical to the stability of the spring 5, an instantaneous ejection occurs (progio spring 5, as a result of which the yoke 4 completes the rotation, and the contact plate 7, having turned around the conditional axis 8, occupies the second stable position in this key cell state for example, with the pad, you

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complete on the basis of the body (not shown).

In connection with the provision of pre-compression of the spring between parallel support surfaces, a stable, without triggering, accumulation of spring energy is provided, which is released to drive the contact plate when the rocker reaches a critical angle of spring stability, and reliable operation is ensured by the possibility of creating stable and unstable conditions springs, having more free, practically realizable, accuracy characteristics. I

The use of a pivotally rotated rocker with a rotation axis shifted relative to the spring axis increases the reliability of the return of cell elements to their original state and increases the reliability and durability of the device as a whole ..

Claims (1)

Invention Formula The actuator of the keycell actuator, comprising a housing, a key and a pre-stressed coiled helical spring, one end of which rests on the actuator and the other is connected to a key, characterized in that, in order to increase reliability, durability and manufacturability, it is equipped with a rocker The body is a support for the rocker arm, which is fixed on the key pivotally with the possibility of rotation, while the other end of the cylindrical spring is connected to the key through the rocker arm and fixed on one of its sides. so that the axis of the coil spring in its initial position is perpendicular to the rocker arm, the free arm of which, during the working stroke of the key, interacts with the indicated stop with the possibility of changing the angle of inclination of the rocker arm. 12 FIG. it