Now their parents are too.(1) Field of the Invention
The present invention relates to an anti-theft device for an automotive vehicle, and more particularly to an anti-theft device which detects a movement of a vehicle window by using a sensor and informs an occupant of a theft attempt.
(2) Description of the Related Art
In general, an automotive vehicle is provided with a glass window having glass to be opened or closed. When the glass window is opened or closed, a window winder mounted in a window opening opens or closes the glass window. In order to protect the window winder from an external object, such as a window frame, there are known vehicle anti-theft devices of a so-called contact type which are so designed as to abut the window frame against a part of the window opening and thereby detect a movement of the window frame, and a so-called non-contact type which are so designed as to detect a movement of the window frame by using a sensor.
There are also known an anti-theft device of a so-called auto-locking type which locks the window closing means when the window is in a closed state in order to prevent the window from being forcibly opened.
The contact type anti-theft device is configured to carry out the anti-theft operation in the following manner. When a window frame is slidably moved against a window opening, a lock member of the window closing means is brought into contact with the window frame. Then, the window is locked to the window frame.
The non-contact type anti-theft device is configured to carry out the anti-theft operation in the following manner. When a window frame is slidably moved against a window opening, a sensor detects a movement of the window frame. Then, a switch is turned on or off, thereby detecting a movement of the window frame.
In the contact type anti-theft device, the lock member is required to be brought into contact with the window frame. However, it is necessary to dispose the lock member on the inner side of the window frame, thereby enlarging the window frame. This may deteriorate a visibility of an occupant of the vehicle.
In the non-contact type anti-theft device, the window closing means can be locked when the window frame is slidably moved against the window opening. However, it is necessary to adjust a position at which the sensor is disposed, thereby complicating a structure of the anti-theft 3125841983
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