| 摘要 |
A shopping cart theft prevention system which includes signal sending means and a receiver carried by the cart for receiving a cart-immobilizing or cart-mobilizing signal from the transmitter. The cart includes a frame and a sub-frame pivoted to the frame and bearing spaced cart-supporting wheels, the sub-frame being connected to the frame by a latch. The latch is opened whenever a signal is received from the transmitter by a receiver attached to the cart. Alternatively, a signal can be sent to keep the latch closed, and upon removal of the signal, the latch can be opened. The cart may carry a battery operated solenoid triggered by the radio signal. The plunger of the solenoid may comprise or activate a crossbar on the latch. Thus, when the solenoid is operated, the crossbar is moved so that the latch is open or closed, allowing the sub-frame and associated wheels to automatically swing out of operative position when open, thereby immobilizing the cart.
|
