SEAT DOOR AND WINDOW MECHANISM OF CAR BODY

Construction and working of door lock mechanism:

There are different methods to door lock or unlock mechanisms:

1. With a key

2. By pressing the unlock button inside the car

3. By using the combination lock on the outside of the door

4. By pulling up the knob on the inside of the door.

5. With a keyless – entry remote control.

6. By a signal from a control center.

In most of the cars having power door locks, the lock/unlock switch actually sends power to the actuators that unlock the doors. But in more complicated system having several ways to lock and unlock the doors, the body controller decides when to do the unlocking. Body controller is a computer in the car. Besides locks it takes care of many little things that makes your car friendlier

e.g., it make sure the interior lights stay on until the car is started, it beeps if you leave your head lights on or leave the key in the ignition. Etc., In power locks, body controller monitors all the possible sources ‘lock’ or ‘unlock’ signals e.g. it monitors a door – mounted touch pad and unlock the doorsn when the correct mode is entered, it monitors a radio frequency and unlocks the doors when it receives the connect digital code from the radio transmitter in the key fob and also monitor the switches inside the car. When it receives a signal from any of these sources, it provides power to the actuator that locks or unlocks the doors.

The detailed power lock mechanism, in the door the actuator is portioned bellow the latch. A rod connects the actuator to the latch and another rod connects the latch to the knob that sticks up out of the top of the door. When the actuator moves the latch up, it connects the outside door handle to the opening mechanism. When the latch is down the outside door handle is disconnected from the mechanism so that the door cannot be opened. To unlock the door, the body controller supplies power to the doorlock actuator for a timed interval. The door lock actuator is a simple device. It consists of a small electric motor which turns a series of spur geans that operate a rack. The rack pulls the knob up or pushes it down, thus opening or closing the lock.

Construction and Working of Manual Window Regulating Mechanism:

The window glass winding mechanism included in the door construction. When the handle is turning one direction, the toothed quadrant which in turn moves the window carnivore. The glass fitted on the window carrier which moves up and down as per the direction of rotation of the toothed quadrant either clock wise or anti clock wise.

Construction and Working of Seat Adjusting Mechanism:

It is different form from the passenger seat . Bucket tupe of seat commonly used. This type of seat is adjustable towards or away from the steering wheel or control pedals in order to suit driver’s varying lengths of the legs. In this arrangement rails are fixed to the frame. Frame is fixed with bolts to slide on a rails squire to the floor. A lever projected to laterally to the seat cushion. This engages with slide catch for seat position adjustment. The return spring of the rocker again engages with the side catch. The lever is left free after the adjustment of seat.