Electronic circuit unit and communication device

A communication device comprising:

• a plurality of electronic circuit units;
• and
• a shelf;
• wherein one of the plurality of electronic circuit units comprises:
• an electronic circuit unit main body that is housed in the shelf, the electronic circuit unit main body being inserted in the shelf;
• a first rotating shaft that is provided on a front side of the electronic circuit unit main body in a viewpoint of a direction in which the electronic circuit unit main body is inserted;
• a lever member that is rotatably provided about the first rotating shaft, the lever member that urges the electronic circuit unit main body toward a depth side of the shelf by principles of leverage by making contact with part of the shelf when the lever member is rotated in a first direction about the first rotating shaft and urges the electronic circuit unit main body toward a front side of the shelf by the principles of leverage by making contact with another part of the shelf when the lever member is rotated in a second direction about the first rotating shaft, the second direction opposite to the first direction;
• a second rotating shaft that is provided in the lever member and extends parallel to the first rotating shaft;
• a locking member that is rotatably provided about the second rotating shaft, the locking member that locks the lever member in such a way that rotation of the lever member in the second direction about the first rotating shaft is disabled in a state in which insertion of the electronic circuit unit main body into the shelf is completed, the locking member contacting a force transmission member causing the force transmission member to apply a force to the lever member that rotates the lever member in the second direction about the first rotating shaft while releasing a lock on the lever member when the locking member is rotated in a second direction about the second rotating shaft in a locked state of the lever member;
• an elastic member provided around the second rotating shaft, one end of the elastic member is held by the force transmission member and another end of the elastic member is held by the locking member, wherein
• the elastic member urges the locking member to rotate in a first direction about the second rotating shaft,
• an elastic force is transmitted between the lever member and the locking member, and
• the force transmission member is fixed to the lever member and extends in a vertical direction parallel to the second rotating shaft.