JP3853523B2 - Magnetic tape cartridge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a magnetic tape cartridge, and in particular, a single reel around which a magnetic tape is wound is rotatably accommodated in a cartridge case, and an opening for drawing out the magnetic tape is provided in a part of the cartridge case. The present invention relates to a structure for preventing erroneous mounting of the magnetic tape.
[0002]
[Prior art]
Conventionally, a magnetic tape cartridge used as a recording medium used in an external storage device such as a computer is of a type in which a magnetic tape is wound around a single reel and the reel is rotatably accommodated in a cartridge case. Things are known. This magnetic tape is used for data storage of computers, etc. and stores important information, so that it is configured so that troubles such as tape jamming do not occur and the magnetic tape is not pulled out carelessly. Yes.
[0003]
The cartridge case is composed of a lower case and an upper case that are overlapped and fastened, and a reel around which a magnetic tape is wound is inserted and assembled in one case before the upper and lower cases are overlapped. The cartridge case is provided with an opening for pulling out the magnetic tape, and fixing bosses for fastening the upper and lower cases are provided on the inner surfaces of the upper case and the lower case in the vicinity of the opening. Further, a positioning boss is formed on the inner surface of the lower case so as to form a positioning hole on the bottom surface of the cartridge case.
[0004]
[Problems to be solved by the invention]
Thus, in the cartridge case as described above, the magnetic tape led out from the opening of the cartridge case when the reel wound with the magnetic tape is inserted and the lower case and the upper case are fastened in the assembly. However, there is a possibility that it is assembled between the fixing boss and the positioning boss in the case which is not a regular path, or is assembled in a state of being caught by the positioning boss.
[0005]
FIG. 8 shows an inner view of the upper case 2 and the lower case 3 of the cartridge case 1 of the example. A reel 4 around which a magnetic tape 5 is wound is placed on the lower case 3.
[0006]
The upper case 2 and the lower case 3 are provided with outer walls 2b and 3b standing around the substantially rectangular upper wall 2a and lower wall 3a, and partially arc-shaped inner walls 2c and 3c along the outer periphery of the reel 4. Is formed. Further, an opening 7 for drawing out the magnetic tape 5 is formed on one side surface of the cartridge case 1.
[0007]
The upper case 2 and the lower case 3 are fixed to the four vertical fixing bosses 11 and 12 erected between the inner walls 2c and 3c and the outer walls 2b and 3b by tightening screws from the bottom surface side. Further, a positioning hole 3d for positioning the cartridge case 1 at a predetermined position in the drive device is provided on the bottom surface of the lower case 3, and along with the formation of the positioning hole 3d, the inner surface of the lower case 3 extends from the lower wall 3a. A positioning boss 13 protruding upward is provided.
[0008]
FIG. 9 shows the XX cross-sectional structure of FIG. 8 in the vicinity of the opening 7, and the fixing boss 12 and the positioning boss 13 are arranged close to the lower case 3 near the opening 7 from the lower wall 3a. The tip of the upper fixing boss 11 protruding from the upper wall 2a of the upper case 2 comes into contact with the tip of the lower fixing boss 12, and screws (not shown) are inserted into the internal screw holes 11a and 12a and fastened. Is done. On the other hand, the positioning boss 13 is provided only in the lower case 3, and the upper end thereof is lower than the fixing boss 12.
[0009]
The leading end of the magnetic tape 5 wound around the reel 4 is led out from the opening 7 of the cartridge case 1, and its normal path is the opening from the tangential direction of the reel 4 as indicated by a chain line. 7, which passes the outside of the positioning boss 13, but is not in a normal path that passes between the fixing bosses 11, 12 and the positioning boss 13 and exits to the opening 7 as indicated by the solid line. It can happen to be assembled. Further, the magnetic tape 5 may be assembled in a state where the edge of the magnetic tape 5 which is horizontal or inclined is caught on the head of the positioning boss 13.
[0010]
If the magnetic tape is fed out or rewound through a path other than the normal path as described above, the drawer member fixed to the tip of the magnetic tape cannot be stored in a predetermined position of the cartridge case, or the magnetic tape is excessive. Various adverse effects such as tape elongation and scratches occur due to the load acting, which may lead to a decrease in reliability.
[0011]
The present invention has been made in view of the above points, and when a single reel wound with a magnetic tape is assembled into a cartridge case, the magnetic tape is assembled between a fixing boss and a positioning boss in the case. It is an object of the present invention to provide a magnetic tape cartridge which prevents the above.
[0012]
[Means for Solving the Problems]
The magnetic tape cartridge of the present invention that has solved the above-mentioned problems includes a cartridge case that rotatably accommodates a single reel wound with a magnetic tape by a lower case and an upper case that overlaps the upper portion of the lower case. An opening for pulling out the magnetic tape is provided in the cartridge case, and fixing bosses for fastening the upper and lower cases are respectively provided on the inner surfaces of the upper case and the lower case in the vicinity of the opening. A positioning boss is formed on the inner surface of the lower case to form a positioning hole on the bottom surface of the cartridge case. Auxiliary ribs covering the gap between the fixing boss and the positioning boss are provided on the fixing bosses of the upper case and the lower case. It is characterized by being connected.
[0013]
In another magnetic tape cartridge of the present invention, an auxiliary rib that covers the gap between the fixing boss and the positioning boss is extended along the outer periphery of the reel to the ends of the inner walls provided in the upper case and the lower case. It is characterized by having set up.
[0014]
In addition to the formation of the auxiliary rib as described above, an auxiliary boss protruding toward the tip of the positioning boss may be provided on the inner surface of the upper case at a position corresponding to the positioning boss of the lower case.
[0015]
【The invention's effect】
According to the present invention as described above, in the cartridge case in which the fixing boss for fastening the upper and lower cases and the positioning boss for forming the positioning hole are projected, the gap between the fixing boss and the positioning boss is covered. The auxiliary rib is connected to the fixing bosses of the upper case and the lower case, or extended to the end of the inner wall along the outer periphery of the reel, so that the reel wrapped with magnetic tape is inserted and the upper case and the upper case are inserted. When fastening the case, the magnetic tape led to the outside from the opening of the cartridge case is assembled between the fixing boss and the positioning boss in the case which is not a regular path, or the positioning boss As a result, it is possible to prevent the drawer member attached to the tip of the magnetic tape from being stored in a predetermined position of the cartridge case. Growth tape of-flops, it is possible to ensure the reliability without scratches or the like occurs.
[0016]
Further, in addition to the auxiliary ribs described above, the auxiliary tape provided on the upper case corresponding to the positioning boss of the lower case can further prevent the magnetic tape from being caught by the positioning boss.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. FIG. 1 is an internal view of the main part near the openings of the upper case and the lower case of the magnetic tape cartridge according to the first embodiment, and FIG. 2 is a side view of the opening in an assembled state.
[0018]
The magnetic tape cartridge is configured such that a single reel 4 around which a magnetic tape 5 is wound is rotatably accommodated in a cartridge case 1 in which an upper case 2 and a lower case 3 are fastened by screws or the like. The state shown in FIG. 1 is a state before assembly in which the reel 4 is placed on the lower case 3.
[0019]
The upper case 2 and the lower case 3 are provided with outer walls 2b and 3b standing around the substantially rectangular upper wall 2a and lower wall 3a, and partially arc-shaped inner walls 2c and 3c along the outer periphery of the reel 4. Is formed. Further, an opening 7 for drawing out the magnetic tape 5 is formed on one side surface of the cartridge case 1.
[0020]
The upper case 2 and the lower case 3 are provided with upper and lower fixing bosses 11 and 12 (four locations as shown in FIG. 8) between the inner walls 2c and 3c and the outer walls 2b and 3b. The ends of both fixing bosses 11 and 12 come into contact with each other, and screws (not shown) are inserted into the internal screw holes 11a and 12a from the bottom surface side of the lower case 3 and fastened. Further, in order to provide a positioning hole 3 d at a predetermined position on the bottom surface of the lower case 3, a positioning boss 13 protruding upward from the lower wall 3 a is provided on the inner surface of the lower case 3, and the fixing boss 12 near the opening 7. It is provided close to. The positioning boss 13 is provided only in the lower case 3, and the upper end thereof is lower than the fixing boss 12.
[0021]
The fixing bosses 11 and 12 in the vicinity of the opening 7 of the upper case 2 and the lower case 3 are arranged between the opening 7 and the positioning boss 13 from the side of the fixing bosses 11 and 12 and the opening 7. Auxiliary ribs 15 and 16 that cover the gap between the fixing bosses 11 and 12 and the positioning boss 13 are connected in parallel with each other. The auxiliary ribs 15 and 16 are provided at substantially the same height as the fixing bosses 11 and 12, and when the upper and lower cases 2 and 3 are overlapped, the upper and lower auxiliary ribs 15 and 16 are continuous in the vertical direction. ing.
[0022]
According to this embodiment, when assembling the cartridge case 1 so that the tip of the magnetic tape 5 wound around the reel 4 is led out from the opening 7 when the cartridge case 1 is assembled, the magnetic tape 5 is used for fixing. Even if the magnetic tape 5 is inserted between the bosses 11 and 12 and the positioning boss 13, the side edges of the magnetic tape 5 abut against the auxiliary ribs 15 and 16 so as to reach between the fixing bosses 11 and 12 and the positioning boss 13. The insertion is blocked and the assembly is performed in a regular path outside the positioning boss 13.
[0023]
Next, FIG. 3 and FIG. 4 are an inner surface view of the main part in the vicinity of the opening parts of the upper case 2 and the lower case 3 of the cartridge case 1 of the second embodiment and a side view of the opening part in the assembled state.
[0024]
The basic structure of the upper case 2 and the lower case 3 is the same as that of the first embodiment, and the positioning boss 13 in the lower case 3 is installed slightly away from the center position of the reel 4.
[0025]
Then, the inner walls 2c, 3c on the inner peripheral side of the positioning boss 13 are placed at the ends of the arc-shaped inner walls 2c, 3c along the outer periphery of the reel 4 in the vicinity of the opening 7 of the upper case 2 and the lower case 3. Auxiliary ribs 17 and 18 that cover the gap between the fixing bosses 11 and 12 and the positioning boss 13 are connected so that the end portions of the fixing bosses 11 extend in an arc shape (may be linear). The auxiliary ribs 17 and 18 are provided at substantially the same height as the fixing bosses 11 and 12, and when the upper and lower cases 2 and 3 are overlapped, the upper and lower auxiliary ribs 17 and 18 are continuous in the vertical direction. ing.
[0026]
Further, on the inner surface of the upper case 2, an auxiliary boss 19 that protrudes toward the tip of the positioning boss 13 protrudes from the upper wall 2 a at a position corresponding to the positioning boss 13 of the lower case 3. The auxiliary boss 19 is provided with a diameter smaller than the diameter of the positioning boss 13, and has a height such that the tip of the auxiliary boss 19 abuts against the tip of the positioning boss 13.
[0027]
According to the present embodiment, even when the magnetic tape 5 wound around the reel 4 is inserted between the fixing bosses 11 and 12 and the positioning boss 13 when the cartridge case 1 is assembled, this magnetic tape is used. 5 is brought into contact with the auxiliary ribs 17 and 18 to prevent insertion between the fixing bosses 11 and 12 and the positioning boss 13. Further, the auxiliary boss 19 prevents the magnetic tape 5 assembled in the regular path from being laterally or obliquely caught at the edge of the head of the positioning boss 13.
[0028]
FIG. 5 is a cross-sectional view of the positioning boss portion 13 showing another aspect of the second embodiment. A recess 13a is formed at the tip of the positioning boss 13, and the tip of the auxiliary boss 19 is formed in the recess 13a. Is provided in the fitting structure into which is inserted.
[0029]
In the above structure, no gap is formed between the tip end of the positioning boss 13 and the tip end of the auxiliary boss 19, and the magnetic tape 5 is prevented from being sandwiched between the two.
[0030]
Next, FIGS. 6 and 7 are an inner surface view of the main part in the vicinity of the openings of the upper case 2 and the lower case 3 of the cartridge case 1 of the third embodiment and a side view of the opening in the assembled state.
[0031]
The basic structure of the upper case 2 and the lower case 3 is the same as that of the second embodiment, and the fixing bosses 11 and 12 are positioned on the ends of the arc-shaped inner walls 2c and 3c along the outer periphery of the reel 4. Auxiliary ribs 17 and 18 that cover the gap between the boss 13 are similarly connected.
[0032]
On the inner surface of the upper case 2, an auxiliary boss 20 having a substantially semi-cylindrical cross section protruding toward the tip of the positioning boss 13 protrudes from the upper wall 2 a at a position corresponding to the positioning boss 13 of the lower case 3. It is installed. The auxiliary boss 20 is provided with the same diameter as the positioning boss 13, and the auxiliary rib 17 side portion is removed and formed toward the normal path side portion of the magnetic tape 5. Further, the tip of the positioning boss 13 is formed at such a height that it abuts against the tip of the positioning boss 13, and in the state of abutment, the contact portion between the two is not stepped to reduce the influence on the traveling magnetic tape 5. Yes.
[0033]
Also in the first embodiment, auxiliary bosses 19 and 20 that protrude toward the head of the positioning boss 13 of the lower case 3 may be provided on the inner surface of the upper case 2.
[Brief description of the drawings]
FIG. 1 is an internal view of the main part near the opening of an upper case and a lower case of a magnetic tape cartridge according to a first embodiment of the present invention. FIG. 2 is a side view of the opening of the magnetic tape cartridge in FIG. FIG. 3 is an internal view of the main part in the vicinity of the openings of the upper and lower cases of the magnetic tape cartridge according to the second embodiment of the present invention. FIG. 5 is a cross-sectional view of a positioning boss portion showing another aspect of FIG. 4. FIG. 6 is a schematic view of an essential part of the upper and lower cases of the magnetic tape cartridge according to the third embodiment of the present invention. FIG. 7 is a side view of the opening in the assembled state of the magnetic tape cartridge of FIG. 6. FIG. 8 is an inner view of an upper case and a lower case showing a conventional magnetic tape cartridge. ] Sectional view taken along line X-X of Figure 8 in assembled state [Description of symbols]
1 Cartridge case 2 Upper case
2b, 3b outer wall
2c, 3c inner wall
3d Positioning hole 3 Lower case 4 Reel 5 Magnetic tape 7 Opening
11,12 Boss for fixing
13 Positioning boss
15-18 Auxiliary ribs
19,20 Auxiliary boss

Claims (3)

A lower case and an upper case overlaid on the lower case are provided with a cartridge case that rotatably accommodates a single reel wound with a magnetic tape, and an opening for drawing the magnetic tape into the cartridge case. A fixing boss for fastening the upper and lower cases protrudes from the inner surface of the upper case and the lower case in the vicinity of the opening, and a positioning hole is formed on the bottom surface of the cartridge case. In the magnetic tape cartridge with the positioning boss protruding,
A magnetic tape cartridge, wherein an auxiliary rib that covers a gap between the fixing boss and the positioning boss is connected to the fixing bosses of the upper case and the lower case. A lower case and an upper case overlaid on the lower case are provided with a cartridge case that rotatably accommodates a single reel wound with a magnetic tape, and an opening for drawing the magnetic tape into the cartridge case. A fixing boss for fastening the upper and lower cases protrudes from the inner surface of the upper case and the lower case in the vicinity of the opening, and a positioning hole is formed on the bottom surface of the cartridge case. In the magnetic tape cartridge with the positioning boss protruding,
A magnetic tape cartridge, wherein an auxiliary rib that covers a gap between the fixing boss and the positioning boss is extended along the outer periphery of the reel to end portions of inner walls provided in an upper case and a lower case. . 3. The magnetic tape cartridge according to claim 1, wherein an auxiliary boss projecting toward a tip of the positioning boss is provided on an inner surface of the upper case at a position corresponding to the positioning boss of the lower case.

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