초록 ▼

The door latch mechanism independently operated by first and second handles of the door handle assembly comprising a cam member having a cam surface which facilitates translation of movement of the handles to displacement of the cam member. The cam member can be coupled to a latch member and move th

The door latch mechanism independently operated by first and second handles of the door handle assembly comprising a cam member having a cam surface which facilitates translation of movement of the handles to displacement of the cam member. The cam member can be coupled to a latch member and move the latch member between an extended and retracted position. A door lock mechanism can prevent displacement of the second door handle while simultaneously allowing displacement of the first door handle.

대표청구항 ▼

1. A door latch mechanism operably coupled to a door for selectively securing the door relative to a door frame, the door latch mechanism comprising: a latch assembly having a latch member positionable between an extended position engaging the door frame and a retracted position being spaced apart f

1. A door latch mechanism operably coupled to a door for selectively securing the door relative to a door frame, the door latch mechanism comprising: a latch assembly having a latch member positionable between an extended position engaging the door frame and a retracted position being spaced apart from the door frame;a first rack component being movable in at least a first direction, said first rack component having a first slot;a second rack component being movable in at least said first direction, said second rack component having a second slot;a cam member having a cam surface, said cam member being movable in a second direction, said second direction being generally perpendicular to said first direction, said cam member being operably coupled to said latch member for selective movement therewith;an intermediate component having an outer surface engagable with said cam surface, said intermediate component being slidably received within said first slot and said second slot such that linear actuation of at least one of said first rack component and said second rack component causes said intermediate component to cam along said cam surface thereby linearly moving said latch member from said extended position to said retracted position; anda lock pawl being positionable in a lock position and an unlock position, said lock pawl inhibiting movement of said first rack component in said lock position and permitting movement of said first rack component in said unlock position. 2. The door latch mechanism of claim 1, further comprising: an unlock pawl coupled to said lock pawl, said unlock pawl having a cam surface; anda tab extending from said second rack component, said tab cammingly engaging said cam surface of said unlock pawl during movement of said second rack component in said first direction thereby moving said lock pawl from said lock position to said unlock position. 3. The door latch mechanism of claim 1, wherein said first rack component includes a pair of first prongs extending along said first direction, said first prongs being spaced apart and disposed around said cam member, and said second rack component includes a pair of second prongs extending along said first direction, said second prongs being spaced apart and disposed around said cam member, said second prongs being disposed between said first prongs and said cam member. 4. The door latch mechanism of claim 3, wherein said first prongs each include a first slot extending along said first direction, said second prongs each include a second slot extending along said first direction, andsaid intermediate component is disposed between said first and second prongs and extends into said first and second slots, said intermediate component moving relative to one of said first and second rack components along one of said first and second slots when the other of said first and second rack components moves said intermediate component. 5. The door latch mechanism of claim 4, wherein said intermediate component has a rod portion extending into said first and second slots and a disk portion defining said outer surface, said disk portion being disposed between said first and second prongs adjacent said cam member. 6. The door latch mechanism of claim 1, wherein said cam surface has an arcuate shape. 7. The door latch mechanism of claim 1, wherein said cam surface has a concave shape. 8. The door latch mechanism of claim 1, further comprising: at least one bearing member engaging at least one of said first rack component and said second rack component. 9. The door latch mechanism of claim 1, further comprising: a stop member extending from said latch member, said stop member engaging a latch member housing in said extended position. 10. A door latch mechanism operably coupled to a door for selectively securing the door relative to a door frame, the door latch mechanism comprising: a latch assembly having a latch member positionable between an extended position engaging the door frame and a retracted position being spaced apart from the door frame;a first rack component being linearly movable in at least a first direction, said first rack component having a first slot;a second rack component being linearly movable in at least said first direction, said second rack component having a second slot;a cam member having a cam surface, said cam member being linearly movable in a second direction, said second direction being generally perpendicular to said first direction, said cam member being operably coupled to said latch member for selective movement therewith; andan intermediate component engaging said cam surface, said intermediate component being slidably received within said first slot and said second slot such that linear actuation of at least one of said first rack component and said second rack component causes said intermediate component to cam along said cam surface thereby linearly moving said latch member from said extended position to said retracted position. 11. The door latch mechanism of claim 10, wherein said cam surface has an arcuate shape. 12. The door latch mechanism of claim 10, wherein said cam surface has a concave shape. 13. The door latch mechanism of claim 10, further comprising: at least one bearing member engaging at least one of said first rack component and said second rack component.