Housing structure for coupling and releasing optical modules

Housing structure for coupling and releasing optical modules;

• said housing structure comprising:
• a first housing comprising a distal wall at one end, an opening at the other end, and said opening having a first protrusion part protruding toward inside of said opening;
• a second housing for receiving and holding one optical module, provided in said first housing so as to be slidable, comprising a second protrusion part for engaging with said first protrusion part, sliding of said second housing being limited by said distal wall of said first housing and said first protrusion part;
• and
• a third housing for holding an other optical module, comprising holding parts for selectively holding said second housing;
• said second housing further comprising engaging means for engaging said holding parts of said third housing;
• said third housing further comprising a contact part for touching said second housing, said contact part being provided at one end of said third housing;
• whereby to couple said optical modules, said third housing is pushed into said first and second housings, whereby said second housing is pressed by said contact part of said third housing and said second protrusion part of said second housing is displaced across said first protrusion part,
• whereby, the sliding limitation of said second housing is released, and said second and third housings are coupled together through said holding parts;
• and whereby to release coupling of said optical modules, said third housing is separated from said first and second housings, whereby said holding parts engage with said engaging means of said second housing, and said second housing is displaced together with said third housing, and said second protrusion part of said second housing returns to an initial position thereof over said first protrusion part of said first housing,
• whereby, sliding of said second housing is limited, and said holding parts of said third housing are displaced across said engaging means of said second housing, and said first and second housings are separated from said third housing.