Patent US4722750A successfully refreshed from Google Patents.
Patent EP0164647A1 successfully refreshed from Google Patents.
EP0164647A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Cartridge
Assignee: Panasonic Holdings Corp
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Filing: 1985-05-29
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Granted: —
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Expires: 2005-05-29
Abstract
Abstract A cartridge (6) includes a shutter (17) movably mounted along and on outside surfaces of a cartridge box (6) for opening or closing a central hole (3) and a head slit (9a) together, a slider (20) for driving the shutter (17), and guide grooves (23a) provided outside a receptacle for a disk and serving to guide the slider (20). The shutter (17) normally closes the central hole (3) and the head slit (9a) to permit the cartridge (6) to completely surround the disk (1), thereby preventing entry of dust from the outside. Even when the slider (20) is broken by accident, the disk (1) is immune from scratches to be constantly held in a good state since the slider (20) is moved on the outside of the receptacle. Moreover, a drive for the shutter (17) is provided forwardly of the center of the receptacle to enable increasing the recording capacity of the disk (1) and miniaturizing the cartridge (6).
Inventors
- 👤 Yashuhisa Fukushima
- 👤 Masuo Maruyama
- 👤 Benichi Miyazaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 03:16
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/03; G11B23/0301; G11B23/0308
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
182 words
A cartridge comprising: a cartridge box including a receptacle for rotatably accommodating a disk, a central hole adapted to receive a rotating means for the rotation of said disk and a head slit adapted to receive a head for recording, reproducing or erasing information on said disk; a channel-sectioned shutter movably mounted on the outer surfaces of said cartridge box for closing said central hole and said head slit; a slider for moving said shutter to open or close said central hole and said head slit; guide groove means for movably guiding said slider; and an elastic member for resiliently biasing said shutter in a direction in which said central hole and said head slit are normally closed; said receptacle having an inner wall which is concentrical with said central hole and is cylindrical-shaped to completely surround the entire outer periphery of said disk, thereby preventing said disk from being exposed to the outside except through said central hole and said head slit, and said shutter normally closing said central hole and said head slit to shut said disk in said receptacle.
Claim 2
Dependent Claim
182 words
A cartridge comprising: a cartridge box including a receptacle for rotatably accommodating a disk, a central hole adapted to receive a rotating means for the rotation of said disk and a head slit adapted to receive a head for recording, reproducing or erasing information on said disk; a channel-sectioned shutter movably mounted on the outer surfaces of said cartridge box for closing said central hole and said head slit; a slider for moving said shutter to open or close said central hole and said head slit; guide groove means for movably guiding said slider; and an elastic member for resiliently biasing said shutter in a direction in which said central hole and said head slit are normally closed; said receptacle having an inner wall which is concentrical with said central hole and is cylindrical-shaped to completely surround the entire outer periphery of said disk, thereby preventing said disk from being exposed to the outside except through said central hole and said head slit, and said shutter normally closing said central hole and said head slit to shut said disk in said receptacle.
Claim 3
Dependent Claim
48 words
A cartridge as set forth in claim 1, wherein said guide groove means is outside the inner wall of said receptacle and is contiguous to the interior of said cartridge box and extends along an opening groove which is provided on the outside surfaces of said cartridge box.
Claim 4
Dependent Claim
38 words
one of or 2 3. A cartridge as set forth in/claims 1/, further comprising a pair of opposed protrusions provided on the inner surfaces of said receptacle and adapted to support a central non-recording area of said disk.
Claim 5
Dependent Claim
43 words
one of to 3 4. A cartridge as set forth in claims 1, further comprising clicks provided on said shutter to extend inwardly thereof, and engaging holes formed on said slider for engaging with said clicks to join said shutter to said slider.
Claim 6
Dependent Claim
43 words
one of 5. A cartridge as set forth in/claims 1 to 4, wherein said shutter is adapted to linearly move in a direction transverse to the direction in which said cartridge is inserted into a recording and reproducing apparatus. one of to 5
Claim 7
Dependent Claim
35 words
A cartridge as set forth in claim1, further comprising guard pieces provided on said cartridge box to be contiguous to the sliding surfaces of said shutter and to cover the opening end of said shutter.
Claim 8
Dependent Claim
40 words
one of to 6 7. A cartridge as set forth in claims1, wherein said guide groove means and opening groove are confined to an area which is disposed either forward or rearward of a virtual center line of said receptacle.
References Cited (Backward Citations)
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