Optical switching unit and optical switching device

An optical switching unit comprising:

• first to twelfth adapters configured to enable insertion and extraction of connectors;
• a first optical switch configured to switch optical connection of the first and second adapters and optical connection of the first and third adapters;
• a second optical switch configured to switch optical connection of the fourth and fifth adapters and optical connection of the fourth and sixth adapters;
• a third optical switch configured to switch optical connection of the seventh and eighth adapters and optical connection of the seventh and ninth adapters;
• a fourth optical switch configured to switch optical connection of the tenth and eleventh adapters and optical connection of the tenth and twelfth adapters;
• and
• a panel portion configured to dispose the first to twelfth adapters,
• wherein each of the first to twelfth adapters has an insertion hole into which the connector is inserted and an engagement portion which is provided in a peripheral edge of the insertion hole and engages with a latch for insertion and extraction in the connector,
• the panel portion has a first region where the first to third adapters are disposed along a first direction, a second region where the fourth to sixth adapters are disposed along the first direction, a third region where the seventh to ninth adapters are disposed along the first direction, and a fourth region where the tenth to twelfth adapters are disposed along the first direction,
• the first and second regions and the third and fourth regions are provided along the first direction, respectively,
• the first and third regions and the second and fourth regions are provided along a second direction orthogonal to the first direction, respectively,
• the second adapter is located between the first and third adapters,
• a distance between the first and second adapters is longer than a distance between the second and third adapters,
• the engagement portion of the second adapter is provided at the side of the first adapter,
• the engagement portion of the third adapter is provided at the side opposite to the side of the second adapter,
• the fifth adapter is located between the fourth and sixth adapters,
• a distance between the fourth and fifth adapters is longer than a distance between the fifth and sixth adapters,
• the engagement portion of the fifth adapter is provided at the side of the fourth adapter,
• the engagement portion of the sixth adapter is provided at the side opposite to the side of the fifth adapter,
• the eighth adapter is located between the seventh and ninth adapters,
• a distance between the seventh and eighth adapters is longer than a distance between the eighth and ninth adapters,
• the engagement portion of the eighth adapter is provided at the side of the seventh adapter,
• the engagement portion of the ninth adapter is provided at the side opposite to the side of the eighth adapter,
• the eleventh adapter is located between the tenth and twelfth adapters,
• a distance between the tenth and eleventh adapters is longer than a distance between the eleventh and twelfth adapters,
• the engagement portion of the eleventh adapter is provided at the side of the tenth adapter, and
• the engagement portion of the twelfth adapter is provided at the side opposite to the side of the eleventh adapter.