Recording tape cartridge

Patent metadata

Field	Value
Publication number	US-2018090169-A1
Application number	US-201715679155-A
Country	US
Kind code	A1
Filing date	Aug 17, 2017
Priority date	Sep 29, 2016
Publication date	Mar 29, 2018
Grant date	—

Abstract

A recording tape cartridge includes a set of two first guide wall portions formed in a direction orthogonal to a loading direction of the case into a drive device and between which a first protruding wall portion formed at a brake member is insertable, and a set of two second guide wall portions and a set of two third guide wall portions formed at regular intervals from the first guide wall portions in a circumferential direction. A second protruding wall portion at the brake member is insertable between the second guide wall portions, and the third protruding wall portion at the brake member is insertable between the third guide wall portions. An interval between the each first guide wall portion and the first protruding wall portion is denoted by α and an interval between the each second guide wall portion and the second protruding wall portion and an interval between the each third guide wall portion and the third protruding wall portion is denoted by β, “α≧2×β” is satisfied.

First claim

What is claimed is:

1 . A recording tape cartridge comprising:
a reel that includes a bottomed cylindrical hub around which a recording tape is wound and a reel gear that is configured to mesh with a drive gear provided at a drive device; a case that houses the reel; a brake member that is disposed inside the hub in a radial direction, that is moved in a direction of a rotation axis of the reel in conjunction with an operation for allowing the drive gear to mesh with the reel gear and an operation for releasing mesh between the drive gear and the reel gear, and that takes a rotation-locking release position at which the rotation of the reel is allowed and a rotation-locking position at which the rotation of the reel is prevented; a first protruding wall portion that protrudes from the brake member and that is disposed along a direction orthogonal to a loading direction in which the case is loaded into the drive device, and a second protruding wall portion and a third protruding wall portion that protrude from the brake member and that are disposed at regular intervals from the first protruding wall portion in a circumferential direction of the break member, when seen in the direction of the rotation axis of the reel; and a set of two first guide wall portions that is formed at an inner surface of a top plate of the case in the direction orthogonal to the loading direction in which the case is loaded into the drive device and between which the first protruding wall portion is insertable, and a set of two second guide wall portions and a set of two third guide wall portions that are formed at the inner surface of the top plate of the case at regular intervals from the first guide wall portions in the circumferential direction, the second protruding wall portion being insertable between the second guide wall portions, and the third protruding wall portion being insertable between the third guide wall portions, when seen in the direction of the rotation axis of the reel, wherein in a case in which an interval between the each first guide wall portion and the first protruding wall portion is denoted by α and each of an interval between the each second guide wall portion and the second protruding wall portion and an interval between the each third guide wall portion and the third protruding wall portion is denoted by β, “α≧2×β” is satisfied.

2 . A recording tape cartridge comprising:
a reel that includes a bottomed cylindrical hub around which a recording tape is wound and a reel gear that is configured to mesh with a drive gear provided at a drive device; a case that houses the reel; a brake member that is disposed inside the hub in a radial direction, that is moved in a direction of a rotation axis of the reel in conjunction with an operation for allowing the drive gear to mesh with the reel gear and an operation for releasing mesh between the drive gear and the reel gear, and that takes a rotation-locking release position at which the rotation of the reel is allowed and a rotation-locking position at which the rotation of the reel is prevented; a first protruding wall portion that protrudes from the brake member and that is disposed along a direction orthogonal to a loading direction in which the case is loaded into the drive device, and a second protruding wall portion and a third protruding wall portion that protrude from the brake member and that are disposed at regular intervals from the first protruding wall portion in a circumferential direction of the break member, when seen in the direction of the rotation axis of the reel; and a set of two first guide wall portions that is formed at an inner surface of a top plate of the case in the direction orthogonal to the loading direction in which the case is loaded into the drive device and between which the first protruding wall portion is insertable, and a set of two second guide wall portions and a set of two third guide wall portions that are formed at the inner surface of the top plate of the case at regular intervals from the first guide wall portions in the circumferential direction, the second protruding wall portion being insertable between the second guide wall portions, and the third protruding wall portion being insertable between the third guide wall portions, when seen in the direction of the rotation axis of the reel, wherein in a case in which an interval between the each first guide wall portion and the first protruding wall portion is denoted by α, each of an interval between the each second guide wall portion and the second protruding wall portion and an interval between the each third guide wall portion and the third protruding wall portion is denoted by β, and each of inclination angles of the second and third guide wall portions with respect to the direction orthogonal to the loading direction in which the case is loaded into the drive device, when seen in the direction of the rotation axis of the reel, is denoted by θ, “α>β/cos θ” is satisfied.

3 . The recording tape cartridge according to claim 1 ,
wherein the first protruding wall portion, the second protruding wall portion, and the third protruding wall portion have the same thickness, and the first guide wall portions, the second guide wall portions, and the third guide wall portions have the same thickness.

4 . The recording tape cartridge according to claim 1 ,
wherein the first protruding wall portion, the second protruding wall portion, and the third protruding wall portion have the same thickness, and a thickness of the each second guide wall portion and a thickness of the each third guide wall portion are larger than a thickness of the each first guide wall portion.

5 . The recording tape cartridge according to claim 1 ,
wherein an interval between the first guide wall portions, an interval between the second guide wall portions, and an interval between the third guide wall portions are equal to each other, and a thickness of the second protruding wall portion and a thickness of the third protruding wall portion are larger than a thickness of the first protruding wall portion.

6 . The recording tape cartridge according to claim 1 , further comprising:
locking members that are provided at regular intervals in the circumferential direction among the first guide wall portions, the second guide wall portions, and the third guide wall portions so as to be slidable in a radial direction of the reel, that take a lifting-locking position at which the locking members are interposed between the reel and the inner surface of the top plate of the case and prevent the movement of the reel in the direction of the rotation axis in a case in which the brake member takes the rotation-locking position, and that take a lifting-locking release position at which the locking members retreat from a space between the reel and the inner surface of the top plate of the case and allow the movement of the reel in the direction of the rotation axis in a case in which the brake member takes the rotation-locking release position.

7 . The recording tape cartridge according to claim 2 ,
wherein the first protruding wall portion, the second protruding wall portion, and the third protruding wall portion have the same thickness, and the first guide wall portions, the second guide wall portions, and the third guide wall portions have the same thickness.

8 . The recording tape cartridge according to claim 2 ,
wherein the first protruding wall portion, the second protruding wall portion, and the third protruding wall portion have the same thickness, and a thickness of the each second guide wall portion and a thickness of the each third guide wall portion are larger than a thickness of the each first guide wall portion.

9

Assignees

• Fujifilm Corp

Inventors

• Kagawa Yusuke

Classifications

• G11B23/045

  Covers · CPC title

• G11B23/044

  Reels or cores; positioning of the reels in the cassette · CPC title

• G11B23/047

  Guiding means · CPC title

• G11B23/043 Primary

  Brakes for tapes or tape reels · CPC title

• G11B23/107

  using one reel or core, one end of the record carrier coming out of the magazine or cassette · CPC title