Abstract: A lift lock for blind is disclosed to include a shaft pivoted to a headrail of a blind for synchronous rotation with a lift rod of the blind. The shaft has a constraint device. A switching mechanism is mounted inside the headrail of the blind and has a sliding member movable between a locking position and an unlocking position. The sliding member has an engagement device, which engages the constraint device to stop the shaft from rotary motion when the sliding member moved to the locking position, or is disengaged from the constraint device for enabling the shaft to be rotated with the lift rod when the sliding member moved to the unlocking position. And, a control mechanism has a pull rod for pulling by the user to switch the switching mechanism between the locking position and the unlocking position.

Abstract: A lift lock for blind is disclosed to include a shaft pivoted to a headrail of a blind for synchronous rotation with a lift rod of the blind. The shaft has a constraint device. A switching mechanism is mounted inside the headrail of the blind and has a sliding member movable between a locking position and an unlocking position. The sliding member has an engagement device, which engages the constraint device to stop the shaft from rotary motion when the sliding member moved to the locking position, or is disengaged from the constraint device for enabling the shaft to be rotated with the lift rod when the sliding member moved to the unlocking position. And, a control mechanism has a pull rod for pulling by the user to switch the switching mechanism between the locking position and the unlocking position.