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AssigneeFuji Photo Film Co., Ltd.
InventorsKiyoo Morita, Daisuke Takahashi, Hideaki Shiga, Seiji Tsuyuki, Yusuke Ishihara
Estimating the term…
A single reel with magnetic tape wound thereon is housed in a case. A restraining member, for restricting rotation of the reel by moving toward or away from the reel, is urged in a restraining direction by an urging member. The pushing-up portions of a releasing member are inserted into the through holes bored in the reel gear of the reel 2 so that the lower ends can abut a driving gear. The releasing member moves the restraining member in a releasing direction by moving according to the chucking operation of drive-side rotation drive means. In this manner, reel-rotation restraining means allows rotation of the reel when being used and restricts the rotation when not being used. In this construction, each of the through holes is bored between the tooth edges of the reel gear so that the releasing member can perform a reliable releasing operation.
A magnetic tape cartridge, for rotatably housing within a cartridge case a single reel having magnetic tape wound thereon, comprising reel-rotation restraining means for allowing rotation of said reel when being used and restricting said rotation when not being used;
A magnetic tape cartridge, for rotatably housing within a cartridge case a single reel having magnetic tape wound thereon, comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
For housing webs or filaments having two distinct ends: using one reel or core, one end of the record carrier coming out of the magazine or cassette
Details: brakes for tapes or tape reels
Information storage based on relative movement between record carrier and transducer
Term ended 6 Dec 2020 (estimated)
The invention relates to a magnetic tape cartridge and more particularly relates, in a magnetic tape cartridge for rotatably housing within a cartridge case a single reel having magnetic tape wound thereon, to the structure of reel-rotation restraining means for causing the reel to be in a rotation-restrained state when not being used.
In conventional tape cartridges used as storage media that are employed in external storage units for computers, etc., there is known a type in which magnetic tape is wound on a single reel and this reel is rotatably housed within a cartridge case. This magnetic tape is employed as a data storing tape for computers, etc., and because important information is stored, reel-rotation restraining means to restrict rotation of the reel is installed so that problems, such as tape jamming, etc., do not occur and so that the magnetic tape is not forwarded unexpectedly when not being used, such as when being archived, etc.
The reel-rotation restraining means is equipped with a restraining member that restricts rotation of the reel by engaging part of the reel, and is provided so that when the cartridge is loaded into a drive unit such as an external storage unit, etc., a restrained state by the restraining member is released according to a reel chucking operation performed by drive-side rotation drive means.
FIG. 1 is a front sectional view of a magnetic tape cartridge of an embodiment of the present invention in the non-operative condition;
FIG. 2 is an exploded perspective view of the essential parts of the magnetic tape cartridge of FIG. 1;
FIG. 3 is a sectional view of the essential parts of the magnetic tape cartridge of FIG. 1 in the operative condition;
The present invention will hereinafter be described in detail, based on embodiments shown in the drawings. FIG. 1 is a sectional view of a magnetic tape cartridge of an embodiment in the non-operative condition, FIG. 2 an exploded perspective view of the essential parts, and FIG. 3a sectional view of the essential parts in the operative condition.
The magnetic cartridge 1 is constructed so that magnetic tape (not shown) is wound on a single reel 2 and that the reel 2 is housed rotatably within a cartridge case 3. The cartridge case 3 is formed by fastening an upper case 31 and a lower case 32, which is provided at a center portion thereof with an opening 32a, together with vis screws, etc. The magnetic tape cartridge 1 is also equipped with reel-rotation restraining means 10 for allowing rotation of the reel 2 when being used, and restricting the rotation when not being used.
The reel 2 consists of a bottomed cylindrical reel hub 21, in which magnetic tape is wound on the outer periphery, and upper and lower flange portions 22 and 23 respectively projected in disk form in the radial direction from the upper and lower ends of the outer periphery of this reel hub 21. The reel hub 21 and the lower flange portion 22 are integrally formed from synthetic resin and are united with the upper flange portion 23, for example, by ultrasonic welding. The reel hub 21 is closed at a lower portion thereof by a bottom wall 21a. A reel gear 24, for driving the reel 2 to rotate, is provided in annular form in the radially outer portion of the lower surface of the bottom wall 21a. A real plate 25 for magnetic suction, formed from an annular metal plate, is attached on the radially inner side from this reel gear 24. And the reel gear 24 and reel plate 25 of the reel 2 are disposed to face an opening 32a in the bottom surface of the cartridge case 3. Note that the reel 2 is urged downward by an urging member 5 to be described later.