| 摘要 |
FIELD: door protection from unauthorized access. SUBSTANCE: axle to control cross bar turning is made of two semi-axles. One end of the first semi-axle is connected to the cross bar and internal hand and has two ledges on another end in the form of symmetric sectors placed at the angle of 180 degrees with a gap between them. One end of the second semi-axle is connected to outer hand and has rectangular ledge on another end. The ledge engages the sector when turning inner door hand through 90 degrees. A disc is attached to the second semi-axle. Two rests are extended on diametrical sides of the semi-axle. One ledge is movable and may be displaced completely into the hole originated in the disc along the axis coming through disc center. It moves under action of magnetic field of electromagnet coil placed under the disc, and return spring. Two recesses are there on inner surface of the casing. The above rests are placed in the recesses. Immovable rest may turned through 90 degrees when movable rest of the disc is moved into the above hole originated in the disc. EFFECT: technological efficiency in making the pawl, high reliability. |
