| 摘要 |
The device is designed generally for joysticks for controlling in two or more directions, continuously or in steps, the movement of working machines, mainly crane, transport and similar mechanisms. It consists of a combination of a permanent magnet with ferromagnetic element, where one of the elements of this combination is connected with axially sliding middle pin, or it forms at least one part of it, whereas the second element is connected with some of the fixed parts of the joystick, preferably with fixed circumferential coat, or it at least forms one part of it. Axially sliding middle pin has its lower end arranged for switching electric safety circuits of the joystick either in a way that in working position of the joystick it gets into contact with the switching mechanism element, or it is arranged in between the pair of security optoelectronic switching elements and is equipped with an opening, that in working position of the joystick lies in the same level as these elements.<IMAGE>
|
