Dynamic magnetic information storage or retrieval – Record medium – In container
Patent
1996-01-05
2000-05-02
Ometz, David L.
Dynamic magnetic information storage or retrieval
Record medium
In container
36013021, 242346, G11B 1560, G11B 23087
Patent
active
060579927
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to tape cartridges which are used as an external data storage for computers, and the like.
BACKGROUND OF THE INVENTION
There is known a tape cartridge wherein a magnetic tape wound around a pair of tape reels is frictionally driven by a drive belt. In the tape cartridge, the movement of the magnetic tape is guided by tape guides standing on a base plate. As is shown in FIG. 32, the tape guide of the tape cartridge comprises a shaft portion 101 which has an outer cylindrical surface serving as a tape running surface 101a, upper and lower flanges 102, 103 which are arranged on upper and lower ends of the shaft portion 101 to restrict upward and downward displacement of the magnetic tape (not shown) which is running on the tape running surface 101a, and a leg portion (pressfitted portion), 104 used for its standing. By press-fitting the leg portion 104 into a guide standing opening 106 formed in a base plate 105, the tape guide is stands on the base plate 105 for practical use.
In general, for production of the above-mentioned conventional tape guide, a cutting work is applied to a metal rod for shaping the shaft portion 101, the upper and lower flanges 102 and 103 and the leg portion 104, and then a polishing work is applied to the outer cylindrical surface of the shaft portion 101 for shaping a smoothed tape running surface 101a.
Since, as is described hereinabove, the above-mentioned conventional tape guide is produced by applying a cutting work to a metal rod for formation of the shaft portion 101, the upper and lower flanges 102 and 103 and then applying a polishing work to the outer cylindrical surface of the shaft portion 101 for formation of the tape running surface 101 a, the production has the following drawbacks.
(1) Because of interference by the upper and lower flanges 102 and 103, the work of polishing the outer surface of the shaft portion 101 is complicated, which causes an increase in cost of the tape guide.
(2) Because of the integrated structure, it is impossible to produce the shaft portion 101 and the upper and lower flanges 102, 103 of different materials. For example, an idea in which, for weight reduction of the tape guide, the upper and lower flanges 102 and 103 are produced of a plastic can not be practically carried out.
In order to solve the above-mentioned drawbacks, an idea may be thought out in which parts of the tape guide, which are the shaft portion 101 and the upper and lower flanges 102, 103, are separately produced and thereafter they are assembled into the tape guide. However, in this case, the work of assembling the parts and that of connecting the assembled tape guide to the base plate are complicated.
Thus, a tape cartridge which employs the tape guide having the above-mentioned drawbacks has the same drawbacks.
The present invention is provided for the purpose of solving the above-mentioned drawbacks.
SUMMARY OF THE INVENTION
According to the present invention, there is provided a tape cartridge in which a magnetic tape wound around a pair of tape reels is frictionally driven by a drive belt, the tape cartridge comprising: reels being rotatably supported by respective reel shafts standing on the base plate; center opening at a center portion; a tape guide including an upper fixing portion which passes through the center opening of the upper flange for having the upper flange secured thereto through caulking, a tape guide portion which guides the traveling of the tape and a lower fixing portion which passes through both the center opening of the lower flange and a fixing bore formed in the base plate for having both the lower flange and the base plate secured thereto through caulking, the tape guide standing on the base plate and guiding, at the tape guide portion, the magnetic tape traveling between the pair of tape reels; respective roller shafts standing on the base plate, the drive belt frictionally driving the magnetic tape wound around the pair of tape reels; magnetic tape on the base plate; and opening
REFERENCES:
patent: 4191345 (1980-03-01), Sato et al.
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patent: 4785367 (1988-11-01), Ohya
patent: 4919356 (1990-04-01), Nakagawa
patent: 4962898 (1990-10-01), Lee
patent: 4991047 (1991-02-01), Shiba et al.
patent: 5034839 (1991-07-01), Okamura et al.
patent: 5453895 (1995-09-01), Kaneda et al.
Kananen Ronald P.
Ometz David L.
Sony Corporation
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