Disk cartridge including an inner rotor and a shutter

A disk cartridge comprising:na disk-like recording medium;a cartridge case that rotatably accommodates the disk-like recording medium and is formed with a first opening that exposes a part of the disk-like recording medium;an inner rotor that is rotatably supported inside the cartridge case and includes a main surface portion formed with a second opening corresponding to the first opening;a shutter that is movable between a closing position at which the first opening is closed and an opening position at which the first opening is opened in accordance with a rotation of the inner rotor; anda buffer mechanism including a rotary shaft that rotatably supports the shutter and an elastic support portion that supports the rotary shaft and can be elastically deformed with respect to the main surface portion by a slit integrally farmed with the main surface portion on the main surface portion.

A disk cartridge, comprising:na disk-like recording medium;a cartridge case that rotatably accommodates the disk-like recording medium and is formed with a first opening that exposes a part of the disk-like recording medium;an inner rotor that is rotatably supported inside the cartridge case and includes a main surface portion formed with a second opening corresponding to the first opening;a buffer mechanism including a rotary shaft that includes a first engagement portion and an elastic support portion that supports the rotary shaft and can be elastically deformed with respect to the main surface portion by a slit integrally formed with the main surface portion on the main surface portion; anda pair of shutter members that are rotatable between a closing position at which the pair of shutter members close the first opening by being brought close to each other and an opening position at which the pair of shutter members open the first opening by being set apart from each other in accordance with a rotation of the inner rotor, the pair of shutter members each including a second engagement portion that is capable of engaging with the first engagement portion and being detached from the first engagement portion in a state where the elastic support portion is elastically deformed a predetermined amount or more.

A disk cartridge, comprising:na disk-like recording medium;a cartridge case that rotatably accommodates the disk-like recording medium and is formed with a first opening that exposes a part of the disk-like recording medium;an inner rotor that is rotatably supported inside the cartridge case and includes a main surface portion formed with a second opening corresponding to the first opening;a shutter that is movable between a closing position at which the first opening is closed and an opening position at which the first opening is opened in accordance with a rotation of the inner rotor;a buffer mechanism that is formed on the main surface portion of the inner rotor and includes a rotary shaft that rotatably supports the shutter and an elastic support portion that supports the rotary shaft and can be elastically deformed with respect to the main surface portion; andan engagement mechanism that is provided between the cartridge case and the shutter and maintains an engaged state between the cartridge case and the shutter when the shutter is positioned at the closing position.

A disk cartridge, comprising:na disk-like recording medium;a cartridge case that includes a guide groove, rotatably accommodates the disk-like recording medium, and is formed with a first opening that exposes a part of the disk-like recording medium;an inner rotor that includes a main surface portion, a toric circumferential wall portion formed on one surface of the main surface portion, a second opening that is formed on the main surface portion and has a shape corresponding to that of the first opening, and a coupling portion that is positioned at a portion where the second opening is formed in a part of the circumferential wall portion and includes a first end surface on the main surface portion side, that is formed with a first width, and a second end surface on the other side of the main surface portion, that is formed with a second width smaller than the first width, the coupling portion on the second end surface side being slidably engaged with the guide groove so that a rotation of the inner rotor with respect to the cartridge case is guided;a shutter that is movable between a closing position at which the first opening is closed and an opening position at which the first opening is opened in accordance with the rotation of the inner rotor; anda buffer mechanism that is formed on the main surface portion of the inner rotor and includes a rotary shaft that rotatably supports the shutter and an elastic support portion that supports the rotary shaft and can be elastically deformed with respect to the main surface portion.