Release member molding method and recording tape cartridge

Patent metadata

Field	Value
Publication number	US-10071514-B2
Application number	US-201514691583-A
Country	US
Kind code	B2
Filing date	Apr 21, 2015
Priority date	Sep 18, 2014
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A release member molding method for mounting a metallic plate in a main body of a release member by insert-molding. The release member is to be provided to be integrally rotatable with a reel accommodated in a case, and to move a locking member from a locking position that locks rotation of the reel to an allowing position that allows rotation of the reel. The metallic plate touches a sliding protrusion portion of the locking member at a touching surface of the release member. The release member molding method includes an arranging step of arranging the metallic plate in a die and a molding step of charging a resin material into the die and molding the main body in which the metallic plate is mounted. The die contacts a portion of the metallic plate that excludes the touching surface, and the die does not contact the touching surface.

First claim

What is claimed is:

1. A recording tape cartridge comprising:
a reel at which a recording tape is wound onto a reel hub whose shape is a circular tube with a bottom portion, the reel being rotatably accommodated in a case;
a locking member that is provided in the reel hub to be movable in a reel axial direction, the locking member being capable of attaining a locking position at which the locking member locks rotation of the reel and an allowing position at which the locking member allows rotation of the reel relative to the case;
a release member that is provided in the reel hub to be rotatable integrally with the reel, the release member moving the locking member from the locking position to the allowing position when the release member is pushed from an outer side of the case;
a sliding protrusion portion that protrudes from the locking member toward a side at which the release member is disposed; and
a metallic plate that is provided by insert-molding in a main body of the release member, contact damage from a die not being formed at a touching surface of the metallic plate, at which touching surface the metallic plate touches a distal end of the sliding protrusion portion, and contact damage from the die being formed at a portion of the metallic plate that is exposed from the main body, which portion excludes the touching surface; wherein
in a case in which the locking member is in the locking position, the distal end of the sliding protrusion portion contacts the metallic plate.

2. The recording tape cartridge according to claim 1 , wherein a hollowed cavity that opens to the outer side of the case is formed at an axial center portion of the release member, and a gate mark of the insert-molding is formed at a bottom face of the hollowed cavity.

Assignees

• Fujifilm Corp

Inventors

• Sumiya Yosuke

Classifications

• G11B23/107

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

• B29C2045/14327

  anchoring by forcing the material to pass through a hole in the article · CPC title

• B29C45/14311 Primary

  using means for bonding the coating to the articles (B29C45/14795 takes precedence) · CPC title

• G11B23/043

  Brakes for tapes or tape reels · CPC title