Patent ID: 7938460
Filing Date: 2011-05-10
Classification: E05B,Y10S,Y10T

Abstract:
1. A latch release operating apparatus for releasing a latch state of a door, comprising: a switching unit having a pressable portion; and an enclosure including: wherein at least one of the case and the cover is provided with a breathing hole such that an interior of the enclosure communicates with an exterior of the enclosure, wherein a trap is provided at a middle of the breathing hole to reduce an area of the breathing hole, wherein the cover includes a back plate having a pressing portion, wherein the back plate of the cover includes a first engaging claw and a second engaging claw, wherein a protruding length of the first engaging claw is configured to be shorter than a protruding length of the second engaging claw, wherein the case includes a first engagement recess and a second engagement recess, wherein a depth of the first engagement recess is configured to be more shallow than a depth of the second engagement recess, wherein the first engaging claw is engaged to the first engagement recess before the second engaging claw is engaged to the second engagement recess, and wherein, when the cover is pressed, the back plate is configured to move toward and push the pressable portion of the switching unit in order to send a signal for releasing the latch state of the door.