EP0137965A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Disc cartridge
Assignee: Hitachi Ltd
•
Filing: 1984-08-17
•
Granted: —
•
Expires: 2004-08-17
Abstract
Abstract in a recording disc cartridge comprising a disc case formed by a top half and a bottom half each having a spindle hole and a head insertion hole, a recording medium rotatably enclosed in the disc case and shutter means for closing and opening the spindle holes and the head insertion holes, there are provided slider means for moving the shutter means in both lateral directions relative to the line passing each center of the spindle hole and the head insertion hole and means for resiliently exerting the slider means so as to drive the shutter means for closing the spindle holes and the head insertion holes.
Inventors
- 👤 Kanazawa Yasunori
- 👤 Nakamori Yoshiyuki
- 👤 Kuwa Tadahiro
- 👤 Fujimoto Nobuyuki
- 👤 Abe Shinichi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 14:58
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/03; G11B23/0301; G11B23/0306; G11B23/0308
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
128 words
In a disc cartridge comprising a disc case formed by a top half and a bottom half each having a spindle hole and a head insertion hole, a recording medium rotatably enclosed in the disc case and shutter means for closing and opening the spindle holes and the head insertion holes, the improvement comprises means for guiding the shutter means in lateral direction of the disc case, slider means so provided as to move the shutter means in both directions relative to the line passing each center of the spindle hole and the head insertion hole and as to be engageable with the shutter means and means for resiliently exerting the slider means to drive the shutter means for closing the spindle holes and the head insertion holes.
Claim 2
Dependent Claim
128 words
In a disc cartridge comprising a disc case formed by a top half and a bottom half each having a spindle hole and a head insertion hole, a recording medium rotatably enclosed in the disc case and shutter means for closing and opening the spindle holes and the head insertion holes, the improvement comprises means for guiding the shutter means in lateral direction of the disc case, slider means so provided as to move the shutter means in both directions relative to the line passing each center of the spindle hole and the head insertion hole and as to be engageable with the shutter means and means for resiliently exerting the slider means to drive the shutter means for closing the spindle holes and the head insertion holes.
Claim 3
Dependent Claim
31 words
The disc cartridge according to claim 1, wherein said disc cartridge further comprises stopper means disposed on the line connecting the centers of the spindle hole and the head insertion hole.
Claim 4
Dependent Claim
55 words
The disc cartridge according to claim 1, wherein the shutter means is formed by a pair of shutter plates with the front sides connected by a front plate and the engagement of the slider means and the shutter means is made by engaging members formed by bending parts of front portion of the shutter means.
Claim 5
Dependent Claim
29 words
The disc cartridge according to claim 1, wherein said slider means is provided with projections for engaging with the bent parts of the front portions of the shutter means.
Claim 6
Dependent Claim
53 words
The disc cartridge according to claim 1, wherein said shutter means is made of a generally U shaped plate member having two plates and front portion connecting said plate with the front portion defined with an opening for engagement of an engaging member provided in a recording/reproducing apparatus for moving the shutter member.
Claim 7
Dependent Claim
29 words
The disc cartridge according to claim 1, wherein said shutter means is provided with at least one opening corresponding to the standard pin insertion hole of the disc case.
Claim 8
Dependent Claim
93 words
In a disc cartridge comprising a disc case formed by a top half and a bottom half each having a spindle hole and a head insertion hole, a recording medium rotatably enclosed in the disc case, first shutter means for closing and opening the spindle holes and the head insertion holes and resilient means for exerting the first shutter means to a closed position, the improvement comprises a second shutter means for closing and opening standard pin insertion holes and means for operating the second shutter means linking with the first shutter means.
Claim 9
Dependent Claim
93 words
In a disc cartridge comprising a disc case formed by a top half and a bottom half each having a spindle hole and a head insertion hole, a recording medium rotatably enclosed in the disc case, first shutter means for closing and opening the spindle holes and the head insertion holes and resilient means for exerting the first shutter means to a closed position, the improvement comprises a second shutter means for closing and opening standard pin insertion holes and means for operating the second shutter means linking with the first shutter means.
Claim 10
Dependent Claim
23 words
The disc cartridge according to claim 7, wherein said second shutter means is provided with engaging means for engagement with the resilient means.
Claim 11
Dependent Claim
20 words
The disc cartridge according to claim 7, wherein the second shutter means and the resilient means are integrally connected together.
Claim 12
Dependent Claim
30 words
The disc cartridge according to claim 7, wherein said first shutter means is provided with standard pin insertion hole corresponding to the standard pin insertion hole of the disc case.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.