Power-assist motor-vehicle door latch
First Claim
1. A motor-vehicle door latch comprising:
- a housing;
a fork formed with a detent and pivotal about a main axis on the housing from a latched position retaining a bolt deep in the housing, a semilatched position retaining the bolt shallow in the housing, and an unlatched position permitting the bolt to enter and exit the housing;
a main rocker pivotal about the main axis on the housing with the fork between the latched and semilatched positions;
drive means connected to the main rocker for pivoting it about the main axis between the latched and semilatched positions;
a pawl pivoted on the main rocker about a secondary axis offset from the main axis, provided offset from the main and secondary axes with an axially projecting actuator pin, and displaceable between an inner position engaging the detent and rotationally coupling the fork to the main rocker and an outer position clear of the detent and permitting the fork to rotate independently of the main rocker;
a secondary rocker pivoted on the main axis and provided with a cam formation having a lifting portion engageable with the actuator pin to displace the pawl from its inner position to its outer position and a holding portion engageable with the actuator pin to retain it in its outer position; and
means including a coupling and formations on the fork and main rocker forin the semilatched position holding the pawl with the holding portion in the outer position, andin the unlatched position holding the actuator pin out of engagement with the holding portion.
1 Assignment
0 Petitions
Accused Products
Abstract
A motor-vehicle door latch has a fork formed with a detent and pivotal from a latched position retaining a bolt deep, a semilatched position retaining the bolt shallow, and an unlatched position permitting the bolt to enter and exit the latch. A main rocker coaxial with the fork can pivot with the fork between the latched and semilatched positions and a drive is connected to the main rocker for pivoting same about the main axis between the latched and semilatched positions. A pawl pivoted on the main rocker about a secondary axis offset from the main axis is provided offset from the axes with an axially projecting actuator pin and can move between an inner position engaging the detent and rotationally coupling the fork to the main rocker and an outer position clear of the detent and permitting the fork to rotate independently of the main rocker. A secondary rocker pivoted on the main axis is provided with a cam formation having a lifting portion engageable with the actuator pin to displace the pawl from its inner position to its outer position and a holding portion engageable with the actuator pin to retain it in its outer position. A coupling and formations on the fork and main rocker in the semilatched position hold the pawl with the holding portion in the outer position and in the unlatched position hold the actuator pin out of engagement with the holding portion.
48 Citations
5 Claims
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1. A motor-vehicle door latch comprising:
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a housing; a fork formed with a detent and pivotal about a main axis on the housing from a latched position retaining a bolt deep in the housing, a semilatched position retaining the bolt shallow in the housing, and an unlatched position permitting the bolt to enter and exit the housing; a main rocker pivotal about the main axis on the housing with the fork between the latched and semilatched positions; drive means connected to the main rocker for pivoting it about the main axis between the latched and semilatched positions; a pawl pivoted on the main rocker about a secondary axis offset from the main axis, provided offset from the main and secondary axes with an axially projecting actuator pin, and displaceable between an inner position engaging the detent and rotationally coupling the fork to the main rocker and an outer position clear of the detent and permitting the fork to rotate independently of the main rocker; a secondary rocker pivoted on the main axis and provided with a cam formation having a lifting portion engageable with the actuator pin to displace the pawl from its inner position to its outer position and a holding portion engageable with the actuator pin to retain it in its outer position; and means including a coupling and formations on the fork and main rocker for in the semilatched position holding the pawl with the holding portion in the outer position, and in the unlatched position holding the actuator pin out of engagement with the holding portion. - View Dependent Claims (2, 3, 4, 5)
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Specification