Door lock apparatus
AssigneeOhi Seisakusho Co., Ltd.
InventorsYasuyuki Fukushima, Noboru Takamura, Shigenori Taga, Jun Yamagishi
Life of this patent
Estimating the term…
Abstract
A door lock apparatus has a handle switch (31), which is placed in the on condition when an actuator member for opening and closing a back door is operated, an open switch (16), which is placed in the on condition when the door is closed to within a prescribed closure range, a drive circuit, which is formed so as to drive a door lock disengaging motor (25) when both the handle switch (31) and the open switch (16) are in the on condition, and a self-holding circuit holding a condition in which the drive circuit is formed and, in response to the open switch going into to off condition, releasing the condition in which the drive circuit is formed.
Claims10
A door closure apparatus comprising:
- a door locker selectably operative to engage and disengage a striker and shiftable from a locking state thereof to an unlocked state thereof;
- a shifter operatively associated with the door locker and operative to effect a shift of the door locker from the locking state to the unlocked state;
- and
- a prohibitor operatively associated with the shifter to prohibit a reversal of the shifter and comprising a supply maintaining element selectably operative to maintain a supply of power to a drive of the shifter, and a supply interrupter operative to detect a completion of the shift of the door locker to interrupt the supply of power to the drive;
- the door locker comprising:
- a latch mechanism;
- a first tendency provider operative to provide the latch mechanism with a first tendency to unlatch;
- and
- a tendency restricter selectably operative to provide a restriction to the first tendency, whereby the door closure apparatus is operative to have the locking state with the latch mechanism in a latching state, and to have the unlocked state with the latch mechanism in an unlatched state;
- the shifter comprising a mechanical element operative to interrupt the restriction of the first tendency, in a first position thereof;
- the drive being operative to drive the mechanical element to the first position;
- and
- the prohibitor being operative to prohibit a stop after startup of the drive;
- and the drive comprises:
- a motor;
- a first circuit operative to supply electric power to the motor;
- a first switch installed in the first circuit;
- an actuator operative to actuate the first switch;
- and
- a second circuit operative to supply electric power to the actuator;
- and
- the supply maintaining element comprising a diode circuit interconnecting a ground end of a node of the first circuit and a power supply end of the actuator of the second circuit, so that the second circuit maintains power to the motor if the first switch interrupts the first circuit.
A door closure apparatus comprising:
- a door locker selectably operative to engage and disengage a striker and shiftable from a locking state thereof to an unlocked state thereof;
- a shifter operatively associated with the door locker and operative to effect a shift of the door locker from the locking state to the unlocked state;
- and
- a prohibitor operatively associated with the shifter to prohibit a reversal of the shifter and comprising a supply maintaining element selectably operative to maintain a supply of power to a drive of the shifter, and a supply interrupter operative to detect a completion of the shift of the door locker to interrupt the supply of power to the drive;
- the door locker comprising:
- a latch mechanism;
- a first tendency provider operative to provide the latch mechanism with a first tendency to unlatch;
- and
- a tendency restricter selectably operative to provide a restriction to the first tendency, whereby the door closure apparatus is operative to have the locking state with the latch mechanism in a latching state, and to have the unlocked state with the latch mechanism in an unlatched state;
- the shifter comprising a mechanical element operative to allow the restriction of the first tendency, in a second position thereof;
- and
- the shifter comprising a second tendency provider operative to provide the mechanical element with a second tendency to have the second position.
Dependencies are inferred from the claim text.