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Magnetic tape cartridge

Imported: 24 Feb '17 | Published: 06 Jan '04

Kiyoo Morita, Hideaki Shiga, Daisuke Takahashi, Yusuke Ishihara, Seiji Tsuyuki

USPTO - Utility Patents

Abstract

A magnetic tape cartridge includes a cartridge casing formed by upper and lower casing halves and a single reel around which a magnetic tape is wound and which is contained in the cartridge casing for rotation. A slide door for opening and closing a tape outlet opening is mounted on the cartridge casing to be linearly slidable along a door passage between a closing position where it closes the tape outlet opening and an opening position where it opens the tape outlet opening. A door spring for urging the slide door toward the closing position and holding the same in the closing position is disposed on the door passage.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing a magnetic tape cartridge in accordance with a first embodiment of the present invention with the slide door closed,

FIG. 2 is a perspective view showing the magnetic tape cartridge with the slide door opened,

FIG. 3 is a fragmentary horizontal cross-sectional view showing the arrangement of the slide door and the door spring of the magnetic tape cartridge of the first embodiment,

FIG. 4A is a fragmentary vertical cross-sectional view showing the arrangement of the slide door and the door spring with the slide door closed,

FIG. 4B is a fragmentary vertical cross-sectional view showing the arrangement of the slide door and the door spring with the slide door opened,

FIG. 5 is a cross-sectional view taken along line V—V in FIG. 4A,

FIG. 6A is a perspective view showing the rear end face of the slide door and the door spring when the door spring is of a plate spring,

FIG. 6B is a perspective view showing the rear end face of the slide door and the door spring when the door spring is of a wire spring,

FIGS. 7A and 7B are views similar to FIGS. 4A and 4B but showing a modification of the arrangement of the slide door and the door spring,

FIG. 8 is a modification of the spring holding structure which can be employed when the door spring is of a wire spring,

FIG. 9 is a modification of the spring holding structure which can be employed when the door spring is of a wire spring,

FIG. 10 is a view similar to FIG. 3 but showing a spring holding structure in a magnetic tape cartridge in accordance with a second embodiment of the present invention,

FIGS. 11A and 11B are vertical cross-sectional views showing the arrangement of the slide door and the door spring in the magnetic tape cartridge of the second embodiment,

FIG. 12 is a fragmentary cross-section view showing the spring holding structure in the second embodiment,

FIG. 13 is a vertical cross-sectional view showing the arrangement of the slide door and the door spring in a magnetic tape cartridge of a third embodiment of the present invention,

FIG. 14 is a cross-sectional view taken along line XIV—XIV in FIG. 13,

FIG. 15 is a fragmentary cross-sectional view showing a modification of the arrangement of the slide door and the door spring in the third embodiment,

FIGS. 16A and 16B are views similar to FIGS. 4A and 4B but showing a fourth embodiment of the present invention,

FIGS. 17A and 17B are a rear perspective view and a rear side view of the slide door in the fourth embodiment,

FIGS. 18A and 18B are views similar to FIGS.

17A and

17B but showing a modification of the arrangement of the slide door and the door spring,

FIG. 19 is a perspective view showing the arrangement of the slide door and the door spring in a fifth embodiment,

FIGS. 20A and 20B are views similar to FIGS. 4A and 4B but showing a sixth embodiment of the present invention,

FIGS. 21A and 21B are views similar to FIGS. 4A and 4B but showing a seventh embodiment of the present invention,

FIGS. 22A and 22B are views similar to FIGS. 21A and 21B but showing an eighth embodiment of the present invention,

FIGS. 23A and 23B are views similar to FIGS. 21A and 21B but showing a ninth embodiment of the present invention,

FIGS. 24A to

24D are front views of the arrangement of the door spring and the slide door in a magnetic tape cartridge in accordance with a tenth embodiment of the present invention with the slide door in different positions,

FIGS. 25A and 25B are views similar to FIGS. 21A and 21B but showing a eleventh embodiment of the present invention,

FIG. 26 is a perspective view of the slide door employed in the eleventh embodiment,

FIG. 27 is a cross-sectional view taken along line XXVII—XXVII in FIG. 25A,

FIG. 28 is a cross-sectional view taken along line XXVIII—XXVIII in FIG. 25B,

FIGS. 29A and 29B are views similar to FIGS. 21A and 21B but showing a twelfth embodiment of the present invention,

FIG. 30 is a cross-sectional view taken along line XXX—XXX in FIG. 29A,

FIG. 31 is a view for illustrating the effect of the twelfth embodiment,

FIGS. 32A and 32B are views similar to FIGS. 21A and 21B but showing a thirteenth embodiment of the present invention,

FIG. 33 is a cross-sectional view taken along line XXXIII—XXXIII in FIG. 32A,

FIGS. 34A to

34C are cross-sectional views taken along lines A—A, B—B and C—C in FIG. 33,

FIGS. 35A and 35B are views for illustrating the effect of the thirteenth embodiment,

FIG. 36 is a cross-sectional view showing a modification of the thirteenth embodiment,

FIG. 37 is a front view of the slide door in the modification shown in FIG. 36,

FIG. 38 is a front view showing a modification of the spring support rod,

FIGS. 39A to

39C are front views showing a modification of the spring support rod shown in FIG. 38,

FIG. 40 is a front view showing a modification of the coiled spring,

FIG. 41C is a fragmentary plan view of an important part of the rod, FIG. 41B is a side view of the rod and FIG. 41C is a fragmentary cross-sectional view of an important part of the slide door when the rod is formed separately from the slide door,

FIG. 42 is a side view partly in cross-section showing the spring support rod fixed to the slide door,

FIG. 43 is a perspective view showing incorporation of a door unit in the cartridge casing in a fourteenth embodiment of the present invention,

FIG. 44A is a front cross-sectional view showing the door unit in a state where the slide door is in a tacked state,

FIG. 44B is a front cross-sectional view showing the door unit in a state where the slide door is slidable,

FIG. 45 is a cross-sectional view taken along line A—A in FIG. 44B,

FIG. 46A is a front view showing the door spring and the slide door in a magnetic tape cartridge in accordance with a fifteenth embodiment of the present invention,

FIG. 46B is a cross-sectional view of the door spring and the slide door,

FIGS. 47A-47B is a perspective view of the door spring,

FIG. 48A is a front view showing the door spring and the slide door in a magnetic tape cartridge in accordance with a seventeenth embodiment of the present invention,

FIG. 48B is a front view showing a modification of the door spring and the slide door shown in FIG. 48A,

FIG. 49 is an exploded perspective of the spring shown in FIG. 48A,

FIGS. 50A to

50C are views for illustrating the effect of the seventeenth embodiment,

FIGS. 51A and 51B are views similar to FIGS. 21A and 21B but showing an eighteenth embodiment of the present invention,

FIGS. 52A to

52C are views showing modifications of the elastic body,

FIG. 53 is a fragmentary cross-sectional view showing an important part of the magnetic tape cartridge in accordance with a nineteenth embodiment of the present invention,

FIG. 54 is a view similar to FIG. 53 for illustrating the operation of the locking mechanism,

FIGS. 55 and 56 are views similar to FIG. 53 but showing modifications of the nineteenth embodiment,

FIG. 57 is a fragmentary cross-sectional view showing an important part of the magnetic tape cartridge in accordance with a twentieth embodiment of the present invention,

FIGS. 58 and 59 are views for illustrating the operation of the licking mechanism,

FIG. 60 is a fragmentary cross-sectional view showing an important part of the magnetic tape cartridge in accordance with a twenty-first embodiment of the present invention,

FIG. 61 is a perspective view showing the slide door in a magnetic tape cartridge in accordance with a twenty-second embodiment of the present invention,

FIGS. 62 to

66 are perspective views showing the modification of the slide door shown in FIG. 61,

FIG. 67 is a fragmentary cross-sectional view showing an important part of the slide door shown in FIG.

66 and the sliding surface of the slide door passage,

FIGS. 68 and 69 are perspective views showing other modifications of the slide door shown in FIG. 61,

FIGS. 70 and 71 are views similar to FIG. 67 but showing still other modifications of the slide door shown in FIG. 61,

FIG. 72A is a front view of the slide door employed in the magnetic tape cartridge in accordance with a twenty-third embodiment of the present invention,

FIG. 72B is a plan view of the slide door,

FIG. 72C is a cross-sectional view taken along line A—A in FIG. 72A,

FIG. 72D is a side view of the slide door,

FIG. 73 is an enlarged perspective view of a part of the magnetic tape cartridge shown in FIG. 1,

FIG. 74 is a perspective view of the slide door,

FIG. 75 is a perspective view of a modification of the slide door, and

FIG. 76 is an enlarged perspective view of a part of the magnetic tape cartridge in which the slide door shown in FIG. 75 is employed.

Claims

1. A magnetic tape cartridge comprising a cartridge casing, a single reel around which a magnetic tape is wound and which is contained in the cartridge casing for rotation, and a slide door for opening and closing a tape outlet opening mounted on the cartridge casing to be linearly slidable along a door passage between a closing position where it closes the tape outlet opening and an opening position where it opens the tape outlet opening,

2. A magnetic tape cartridge comprising a cartridge casing, a single reel around which a magnetic tape is wound and which is contained in the cartridge casing for rotation, and a slide door for opening and closing a tape outlet opening mounted on the cartridge casing to be linearly slidable along a door passage between a closing position where it closes the tape outlet opening and an opening position where it opens the tape outlet opening,

3. A magnetic tape cartridge as defined in claim 2 in which the slide door is provided with a plurality of discontinuous protrusions on each sliding surface.

4. A magnetic tape cartridge as defined in claim 2 in which the protrusion is rounded.

5. A magnetic tape cartridge comprising a cartridge casing, a single reel around which a magnetic tape is wound and which is contained in the cartridge casing for rotation, and a slide door for opening and closing a tape outlet opening mounted on the cartridge casing to be linearly slidable along a door passage between a closing position where it closes the tape outlet opening and an opening position where it opens the tape outlet opening,

6. A magnetic tape cartridge as defined in claim 5 in which the sliding surfaces of the slide door is provided with recesses and the sliding surfaces of the slide door passage is provided with narrow protrusions which can be fitted in the recesses in the sliding surfaces of the slide door.

7. A magnetic tape cartridges as defined in claim 5 in which the sliding surfaces of the slide door passage are provided with narrow protrusions and the sliding surfaces of the slide door are flat.

8. A magnetic tape cartridge comprising a cartridge casing, a single reel around which a magnetic tape is wound and which is contained in the cartridge casing for rotation, and a slide door for opening and closing a tape outlet opening mounted on the cartridge casing to be linearly slidable along a door passage between a closing position where it closes the tape outlet opening and an opening position where it opens the tape outlet opening,

9. A magnetic tape cartridge comprising a cartridge casing, a single reel around which a magnetic tape is wound and which is contained in the cartridge casing for rotation, and a slide door for opening and closing a tape outlet opening mounted on the cartridge casing to be linearly slidable along a door passage between a closing position where it closes the tape outlet opening and an opening position where it opens the tape outlet opening,