Lock units

Claim 1

A lock unit comprising: a striker; a latch movable between a first position in which the latch engages said striker for binding the same in a bound position against movement and a second position in which the latch releases said striker for allowing the same to move from said bound position; a ratchet disposed in close proximity to said latch and having an engageable portion, said ratchet being movable between a first position in which said engageable portion is caused to engage said latch to retain the latter in said first position and a second position in which said engageable portion is disengaged from said latch to allow the same to move to said second position; a wedge member having an edge zone and disposed for movement between an advanced position, in which said edge zone is engaged with said striker retained in said bound position at a side of the striker opposite to a side thereof engaged by the latch, for preventing chattering of the striker, and a retracted position in which the edge zone is away from said striker in the bound position; resilient means for urging said wedge member toward said advanced position; and an engaging means provided on said ratchet so as to be movable therewith, said engageable means being associated with said wedge member such that when the ratchet is caused to move toward its first position, the engaging means allows the wedge member to move to its advanced position under the force of said resilient means, and that when the ratchet is caused to move toward its second position, the engaging means engages the wedge member to cause the same to move to said retracted position against the force of said resilient means.