Gear box, reduction gear equipped with gear box, motor unit, mold for manufacturing gear box, and manufacturing method of gear box

A mold used to manufacture a gear box for including a gear therein to transfer rotation of a motor to an output shaft, the gear box comprising a gear box body which is made of resin;

• and a terminal which is integrated with the gear box body by insert molding, wherein the gear box body includes a storage portion which stores the gear coaxially disposed with the output shaft, a motor insertion portion which is recessed in an attachment surface of the motor and to which a power supplied side of the motor is inserted, and a connector connection portion which is disposed on the same side as the motor insertion portion with respect to a rotation center of the gear, and is open and recessed in a direction different from the motor insertion portion, and wherein the terminal includes a connector terminal which is exposed to an inside of the connector connection portion, a motor feeding portion which is exposed to an inside of the motor insertion portion, a connecting portion which is buried in the gear box body and connects the connector terminal and the motor feeding portion, and a fixing tab which extends from the connecting portion and is exposed to the inside of the motor insertion portion, the mold comprising:
• two stationary dies which are assembled from two directions facing each other along the rotation center, and configured to mold at least the storage portion;
• a first slide die which is assembled to the stationary die and configured to mold the motor insertion portion;
• and
• a second slide die which is assembled to the stationary die and configured to mold the connector connection portion, wherein
• the first slide die includes a holding portion configured to hold the motor feeding portion and the fixing tab of the terminal.