Magnetic recording and/or reading apparatus and manufacturing method of power transmitting gear

A magnetic recording and/or reading apparatus comprising a power transmitting gear comprising one end coupled to a loading motor and the other end coupled to a plurality of link gears transmitting power of the loading motor to drive components driven during loading and unloading of a magnetic tape, wherein the power transmitting gear comprises:

• a first gear engaged with a motor gear coupled to a shaft of the loading motor;
• a second gear engaged with one of the plurality of link gears;
• and
• a shaft member having a notch located on an outer surface, the shaft member coupling and extending beyond the first and second gears,
• wherein a space being formed inside the shaft member to prevent the shaft member from deforming during manufacturing of the shaft member.

A method of manufacturing a power transmitting gear of a magnetic recording and/or reading apparatus comprising a first gear engaged with a motor gear coupled to a shaft of a loading motor, a second gear engaged with one of a plurality of link gears transmitting power from the loading motor to drive components during loading and unloading of a magnetic tape, and a shaft member coupling and extending beyond the first and second gears and having an axis hole to prevent the shaft member from deforming, the method comprising:

• installing a guide pin corresponding to a size of the axis hole of the shaft member in a molding part of a mold;
• injecting melted plastic into the molding part;
• cooling the injected plastic;
• and
• opening the mold to take the molded power transmitting gear out of the mold.