Cartridge

1. A cartridge installed in a tape printing device including a cartridge installation part, a printing head that is provided in the cartridge installation part and performs printing on a second printing tape, and a device case, the device case having a device-side tape introduction port that introduces the second printing tape from an outside of the device case to an inside of the device case and a device-side tape ejection port that ejects the second printing tape to the outside of the device case, the cartridge comprising:

a tape path through which the second printing tape introduced from the device-side tape introduction port is fed toward the device-side tape ejection port in a state in which the cartridge is installed in the cartridge installation part; and

a tape retention part has

a holding part that holds the second printing tape introduced into the tape path in a state in which the cartridge is not installed in the cartridge installation part, wherein the holding part holds the second printing tape between the holding part and a lateral wall part of the tape path,

an arm part having the holding part,

an arm supporting shaft that supports the arm part to be rotatable to a close position at which the holding part comes close to the lateral wall part and holds the second printing tape between the holding part and the lateral wall part and a separate position at which the holding part separates from the lateral wall part and does not hold the second printing tape between the holding part and the lateral wall part, and

a tape retention spring that applies a force to the arm part towards the close position,

wherein, the tape path connects a cartridge-side tape introduction port and a cartridge-side tape ejection port, and

when the cartridge is installed in the cartridge installation part, the arm part engages a retention cancellation convex part that protrudes from a bottom surface of the cartridge installation part to rotate from the close position to the separate position.

2. The cartridge according to claim 1 , wherein

the cartridge and a tape cartridge that accommodates a tape core on which a tape is wound are alternatively arranged in the cartridge installation part,

the tape cartridge accommodates a first printing tape and a first ink ribbon,

the cartridge accommodates a second ink ribbon,

the tape cartridge has a cylindrical shaft part that rotatably supports the tape core, and

the retention cancellation convex part is inserted into the cylindrical shaft part when the tape cartridge is installed in the cartridge installation part.

3. The cartridge according to claim 1 , wherein

the arm part has an engagement inclination surface inclined with respect to an installation direction of the cartridge, and

the arm part rotates from the close position to the separate position as the retention cancellation convex part engages the engagement inclination surface.

4. The cartridge according to claim 1 , wherein,

when a force is applied to the printing tape introduced into the tape path in a direction in which a tip end of the printing tape is pulled in the tape path, a component of a frictional force between the holding part and the printing tape acts in a direction in which the arm part rotates from the close position to a side opposite to the separate position.

5. The cartridge according to claim 1 , further comprising:

an operation part that rotates the arm part.