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Door lock drive unit

  • US 6,557,910 B2
  • Filed: 11/16/2001
  • Issued: 05/06/2003
  • Est. Priority Date: 11/27/2000
  • Status: Expired due to Fees
First Claim
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1. A door lock drive unit comprising:

  • a door lock in which an open door is closed from an open door state to a closed door state via a half latch state or a full latch state, and a closed door is opened from the closed door state to the open door state via an unlatch state;

    an unlatch mechanism to drive the door lock from the full latch state to the unlatch state when the unlatch mechanism is driven by a motor;

    a closing mechanism to drive the door lock from the half latch state to the full latch state;

    a gear rotated by the motor in a normal and a reverse rotating direction; and

    a cam fixed to the gear, the cam driving the closing mechanism when the gear is rotated in the reverse rotating direction from an initial state of the closing mechanism, the cam returning the closing mechanism to the initial state within one revolution of the gear in the reverse rotating direction; and

    an engagement member provided in the gear or the cam, the engagement member being capable of engaging with the unlatch mechanism when the closing mechanism is in the initial state, the engagement member being capable of transmitting a drive force of the motor to the unlatch mechanism only when the gear is normally rotated from a state in which the engagement member is capable of engaging with the unlatch mechanism.

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