| 摘要 |
The present invention relates to a burglarproof device using an hydraulic brake of an automobile, which enhances the drawbacks of a conventional burglarproof device comprising an alarm unit which is activated by action of the connection switch when the door of the automobile is opened. According to the present invention, the DC motor is driven by the operation of the selecting button for preset secret numbers. The oil pressure inlets are connected to the master cylinder via oil pipes and oil pressure outlets are connected to oil pressure distributor via oil pipes. In the cam case is arranged a rotation shaft adapted to rotate with low speed by a reduction gear, the rotation shaft having the rotation cams (22, 22'). In the oil pressure passages (18, 18') are formed a central path (26) by which valve seats are held in the middle of the oil pressure inlets and outlets. Through the central path (26) is inserted a valve pin (28) of a valve (27). On the valve is arranged a coil spring to push against the valve (27). When the automobile is stopped or parked, the hydraulic braking force is applied to the front and the rear wheels of the automobile in accordance with the principle of the present invention. And then the valve is closed. Consequently, it is impossible to move the automobile since the hydraulic braking state is maintained continuously. During the automobile is running, the valve remains open. |
