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EP0030367A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Magnetic recording tape cassette

Assignee: Maxell Ltd
•
Filing: 1980-12-04
•
Granted: —
•
Expires: 2000-12-04
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Abstract

Abstract in a magnetic recording tape cassette comprising a bottom case (12) a top case (14) assembled with the bottom case to provide a tape chamber (16), one or more of tape roll members (20) mounted in the tape chamber in position, each of wich includes a hub (20a) with a top projection (22) for pivotting the hub and being mounted on the bottom wall of the bottom case and a magnetic recording tape (24) wound on the hub, and a resilient spring member (40, 50) fixed to the undersurface of the top wall of the top case and having one or more of arms with the free ends thereof extending to the top projection of the corresponding hubs to resiliently rotatably support the hubs in position, the improvement comprises a recess (30, 60) defined in the undersurface of the top wall of the top case for accomodation of the fixed part of the spring member, said recess having a depth substantially equal to or larger than the thickness of the spring plate, said recess extending to at least a position corresponding to the maximum diameter of the tape roll member from the position where the spring plate is fixed.

Inventors

  • 👤 Shinichi Goto

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 03:24
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08785; G11B23/08728

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 188 words
In a magnetic recording tape cassette comprising a bottom case, a top case assembled with the bottom case to provide a tape chamber, one or more of tape roll members mounted in the tape chamber in position, each of which includes a hub with a top projection for pivotting the hub and being mounted on the bottom wall of the bottom case and a magnetic recording tape wound on the hub, and a resilient spring member fixed to the undersurface of the top wall of the top case and having one or more of arms with the free ends thereof extending to the top projection of the corresponding hubs to resiliently rotatably support the hubs in position, the improvement comprises a recess defined in the undersurface of the top wall of the top case for accommodation of the fixed part of the spring member, said recess having a depth substantially equal to or larger than the thickness of the spring plate, said recess extending to at least a position corresponding to the maximum diameter of the tape roll member from the position where the spring plate is fixed.
Claim 2
Dependent Claim 188 words
In a magnetic recording tape cassette comprising a bottom case, a top case assembled with the bottom case to provide a tape chamber, one or more of tape roll members mounted in the tape chamber in position, each of which includes a hub with a top projection for pivotting the hub and being mounted on the bottom wall of the bottom case and a magnetic recording tape wound on the hub, and a resilient spring member fixed to the undersurface of the top wall of the top case and having one or more of arms with the free ends thereof extending to the top projection of the corresponding hubs to resiliently rotatably support the hubs in position, the improvement comprises a recess defined in the undersurface of the top wall of the top case for accommodation of the fixed part of the spring member, said recess having a depth substantially equal to or larger than the thickness of the spring plate, said recess extending to at least a position corresponding to the maximum diameter of the tape roll member from the position where the spring plate is fixed.
Claim 3
Dependent Claim 55 words
A magnetic recording tape cassette according to claim 1, wherein two tape roll members are provided in the tape chamber and the resilient spring member is fixed to the top wall of the top case at the central portion thereof with the both free ends engaged with the top projections of both of the hubs.
Claim 4
Dependent Claim 18 words
A magnetic recording tape cassette according to claim 1, wherein the tape roll member comprises a tape reel.
Claim 5
Dependent Claim 20 words
A magnetic recording tape cassette according to claim 1, wherein the resilient spring member has a generally elongated diamond configuration.
Claim 6
Dependent Claim 20 words
A magnetic recording tape cassette according to claim 1, wherein the resilient spring member has a pair of bifurcated arms.
Claim 7
Dependent Claim 26 words
A magnetic recording tape cassette according to claim 1, wherein said recess extends to a position corresponding to the cylindrical outer peripheral surface of the hub.

References Cited (Backward Citations)

DE2934224A1 Cited

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