JP2005267818A - Magnetic tape cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic tape cartridge in which a cartridge case is hardly opened and in which it can easily be confirmed whether the cartridge case is opened or not. <P>SOLUTION: One of an upper half 12 and a lower half 13 is provided with a tightening pin 24 projecting to the side of a tape reel 17, and the other is provided with an insertion through-hole 25 through which the tightening pin 24 can be inserted in the state in which the upper half 12 and the lower half 13 are combined and which tightens the upper half 12 and the lower half 13 by deforming the tip part 24a of the inserted tightening pin 24. Sidewalls 13b are formed on the peripheries of the upper half 12 and the lower half 13, respectively, and partition walls 13c for partitioning the sidewalls 13b and the tape reel are formed, wherein the insertion hole 25 is provided in the region between the sidewall 13b of the upper half 12 or the lower half 13 and the partition wall 13c. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a magnetic tape cartridge in which a single tape reel wound with a magnetic tape is rotatably accommodated in a cartridge case.

  Conventionally, as a magnetic tape cartridge used as a recording medium used in an external storage device such as a computer, a single tape reel wound with a magnetic tape can be rotated in a cartridge case as shown in Patent Document 1 below. What is housed in is known.

  This magnetic tape cartridge is used for storing data in a computer or the like and stores important information. For this reason, there is a type of magnetic tape cartridge having a so-called WORM (Write Once Read Many) function so as to prevent tampering in which data is deleted or rewritten without permission.

  As such a type of magnetic tape cartridge, a cartridge case formed by fitting a lid-like upper half and a lower half with side plates formed on the peripheral edge of a substantially square plate portion, the upper half and the lower half are screwed. In some cases, the cartridge case cannot be easily opened by tightening with. Also, for magnetic tape cartridges that have a function to prevent tampering, the cartridge case can be opened by ultrasonically welding the part where the upper half side plate end and the lower half side plate end fit together. In such a case, a configuration is adopted in which the ultrasonic welded portion is broken and visible.

JP 2000-16761 A

However, like the above-described conventional magnetic tape cartridge, there is room for improvement in that the cartridge case can be opened by removing the screws only by fastening the upper half and the lower half with screws.
Also, the type of magnetic tape cartridge that has a function to prevent tampering is improved in that it is difficult to visually recognize the opened trace because the welded portion between the upper half and the lower half is minute if the cartridge case is opened. There was room.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a magnetic tape cartridge that is difficult to open a cartridge case and can easily confirm whether or not the cartridge case has been opened.

  The above object of the present invention is a magnetic tape cartridge comprising a cartridge case composed of an upper half and a lower half, and a tape reel housed in the cartridge case and wound with a magnetic tape. One of the lower halves is provided with a caulking pin that protrudes toward the tape reel, and on the other side, the caulking pin can be inserted in a state in which the upper half and the lower half are combined. Insertion holes for crimping the upper half and the lower half are provided by deforming the tip of the tape, and side walls are formed on the peripheral edges of the upper half and the lower half, respectively, and a partition that partitions the side wall and the tape reel is formed The magnetic tape cartridge is characterized in that an insertion hole is provided in a region between the side wall of the upper half or the lower half and the partition wall.

The magnetic tape cartridge combines the upper half and the lower half by inserting the crimping pin provided in one of the upper half and the lower half into the insertion hole provided in the other and crimping. Consists of. When the cartridge case is opened, the tip of the deformed caulking pin is the upper part because the tip of the caulking pin inserted through the insertion hole is deformed with the upper half and the lower half combined. It engages with the insertion hole in the half (or lower half), and the caulking pin is prevented from being removed from the insertion hole. Further, when the cartridge case is opened by forcibly separating the upper half and the lower half, the tip end portion of the crimping pin is broken from other portions. Therefore, the user can easily confirm that the cartridge case has been opened based on the broken crimp pin.
In addition, since the insertion hole is provided in the region between the side wall of the upper half or the lower half and the partition wall, when inserting the crimping pin into the insertion hole, the tip of the crimping pin inserted through the insertion hole Even if dust is generated when it is deformed by thermal welding or ultrasonic welding, the dust is held in the area between the partition and the side wall and is prevented from adhering to the magnetic tape wound around the tape reel by the partition. Is done.

  In the magnetic tape cartridge, it is preferable that the tip end portion of the caulking pin is welded inside the insertion hole by thermal welding or ultrasonic welding. By doing so, it is possible to prevent dust or the like from entering the cartridge case through the insertion hole after assembly, and to tighten the crimping pin and the insertion hole more firmly.

  According to the present invention, it is possible to provide a magnetic tape cartridge in which it is difficult to open a cartridge case and it can be easily confirmed whether or not the cartridge case has been opened.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an exploded perspective view showing an embodiment of a magnetic tape cartridge according to the present invention. FIG. 2 is a plan view of the lower case. In this specification, the front-rear direction corresponds to the loading direction of the magnetic tape cartridge with respect to the drive device (the oblique upper right direction indicated by the arrow in FIG. 1 and the upper direction indicated by the arrow in FIG. 2). The drive device side.

  As shown in FIG. 1, the magnetic tape cartridge 10 includes a cartridge case 11 composed of an upper half 12 and a lower half 13. The cartridge case 11 has a flat outer shape that is fastened by a small screw 26 and integrated. Inside the cartridge case 11, a single tape reel 17 around which a magnetic tape T having a leader pin L fixed at the tip is wound is accommodated rotatably.

  The upper half 12 is formed with a substantially square top plate 12a and four side walls 12b erected from the peripheral edge of the top plate 12a. The lower half 13 is formed with a substantially square bottom plate 13a and four side walls 13b erected from the peripheral edge of the bottom plate 13a.

  One of the side surfaces of the cartridge case 11 is formed with an opening 14 for pulling out the magnetic tape T together with the leader pin L by a loading mechanism on the device side when the drive device is loaded.

  The upper half 12 and the lower half 13 are provided with partition walls 13c (the upper half 12 is not shown) formed in an arc shape along the outer periphery of the tape reel 17. In a state where the upper half 12 and the lower half 13 are combined, the upper half partition wall and the lower half partition wall 13c are in contact with each other, and a closed space composed of the side wall and the partition wall is defined at the corner of the cartridge case. is there.

  The lower half 13 has three bottom bosses 13d disposed at three corners of the bottom plate 13a in contact with the three bosses 12d of the upper half 12, respectively. By tightening the small screw 26 from the side, the upper half 12 is fastened in an overlapping state.

  A reel driving opening 13e is opened at the center of the lower half 13, and the tape reel 17 accommodated from the reel driving opening 13e is exposed in a state where the cartridge case 11 is assembled. When the magnetic tape cartridge 10 is loaded in the drive device, a drive unit on the drive device side is inserted into the reel drive opening 13e, and the tape reel 17 is driven to rotate by the drive unit to feed or take up the magnetic tape T. Is done.

  In the vicinity of the side wall 13b on the rear side of the cartridge case 11, an erroneous erasure preventing claw 16 is slidably disposed. At the center of the tape reel 17, a bottomed cylindrical hub that opens to the upper half 12 side is formed. In this hub, the rotation of the tape reel 17 is restricted when the magnetic tape cartridge is not used. A reel lock member 18 is provided.

  Although not shown, a magnetic reel plate is attached to the bottom surface of the tape reel 17 at the center for attracting and holding the drive unit on the drive device side. A reel gear that meshes with the drive gear of the rotation driving means is formed on the outer periphery of the reel plate. In the state where the reel gear and the drive gear are engaged, the reel lock mechanism 18 is released and the tape reel 17 is freely rotatable.

  In the lower half 13, a slide door 15 that opens and closes the opening 14 is urged in a closing direction along a side wall 13d by a spring (not shown). As shown in FIG. 2, a groove-like door rail 15 a on which the slide door 15 slides is formed in the vicinity of the opening 14.

  When the magnetic tape cartridge 10 is not used, the leading end of the leader pin L is formed in the vicinity of the opening 14 on the upper surface of the bottom plate 13a of the lower half 13 with the magnetic tape T completely wound on the tape reel 17. The portion 23 is latched and held.

  In the magnetic tape cartridge 10 of the present embodiment, as shown in FIG. 1, the upper half 12 protrudes toward the lower half 13 at the corner where the boss portion 12 d is not formed among the four corners. A caulking pin 24 is extended.

  As shown in FIG. 2, the lower half 13 of the magnetic tape cartridge 10 has an insertion hole 25 into which the caulking pin 24 is inserted in a state combined with the upper half 12. In the lower half 13, the insertion hole 25 is provided in a region 13A surrounded by two adjacent side walls 13b and a partition wall 13 connected to the two side walls 13b.

  In the magnetic tape cartridge 10 of the present embodiment, the upper half 12 and the lower half 13 are tightened by inserting the crimping pin of the upper half 12 through the insertion hole 25 of the lower half 13 together with the tightening with the small screw 26 already described. It is the composition combined with.

  Next, with reference to FIG.3 and FIG.4, the state of crimping with an upper half and a lower half is demonstrated. FIG. 3 shows a state before the upper half caulking pin and the lower half insertion hole are caulked. FIG. 4 shows a state where the upper half caulking pin is caulked with the lower half insertion hole.

  As shown in FIGS. 3 and 4, the insertion hole 25 formed in the lower half 13 communicates with the small-diameter portion 25 a that opens on the upper surface side of the lower half 13, the small-diameter portion 25 a, and the opening diameter thereof is The large-diameter portion 25b is formed larger than the small-diameter portion 25a. The opening diameter of the small diameter portion 25a is formed substantially equal to the outer diameter of the caulking pin 24 to be inserted.

  As shown in FIG. 4, the front end portion 24a of the crimping pin 24 inserted through the small diameter portion 25a of the insertion hole 25 is exposed from the small diameter portion 25a to the large diameter portion 25b. And the front-end | tip part 24a is made into the state which expanded the diameter by deform | transforming the front-end | tip part 24a of the crimping pin 24 by heat welding or ultrasonic welding. Then, the crimping pin 24 is crimped to the lower half 13 so that the tip 24a is caught by the step between the small diameter part 25a and the large diameter part 25b in the insertion hole 25 so as not to come out to the inside of the cartridge case. In this embodiment, the tip 24a of the crimping pin 24 is deformed by heat welding or ultrasonic welding. However, the present invention is not limited to this. For example, the tip 24a is deformed by applying mechanical stress. The fastening pin 24 may be crimped. However, the tip 24a of the crimping pin 24 is welded into the insertion hole 25 by thermal welding or ultrasonic welding, so that dust and the like enter the cartridge case 11 through the insertion hole 25 after assembly. This can be prevented, and the caulking pin 24 and the insertion hole 25 can be caulked more firmly.

  In the present embodiment, the caulking pin 24 is provided in the upper half 12, and the insertion hole 25 is provided in the lower half 13. However, the upper half 12 is provided with an insertion hole having the same shape as the present embodiment. The lower half 13 may be provided with a caulking pin 24 having the same shape as the present embodiment.

  Therefore, in the magnetic tape cartridge 10 of the present embodiment, the caulking pin 24 provided in one of the upper half 12 and the lower half 13 is inserted into the insertion hole 25 provided in the other and is caulked. The upper half 12 and the lower half 13 are combined. In the state where the upper half 12 and the lower half 13 are combined, the distal end portion 24a of the crimping pin 24 inserted through the insertion hole 25 is deformed. Therefore, when the cartridge case 11 is opened, the deformed crimping is performed. The tip 24 a of the pin 24 is engaged with the insertion hole 25 in the upper half 12 (or the lower half 13), and the caulking pin 24 is prevented from being removed from the insertion hole 25. Further, when the cartridge case 11 is opened by forcibly separating the upper half 12 and the lower half 13, the tip 24 a of the crimping pin 24 is broken, so that the user can apply the broken crimping pin 24 to the broken crimping pin 24. Based on this, it can be easily confirmed that the cartridge case 11 has been opened.

  Further, as shown in FIG. 2, when the insertion hole 25 is provided in the region between the side wall 13 b of the upper half 12 or the lower half 13 and the partition wall 13 c, when the caulking pin 24 is inserted into the insertion hole 25. Even if dust is generated when the tip portion 24a of the caulking pin 24 inserted through the insertion hole 25 is deformed by thermal welding or ultrasonic welding, the region between the partition wall 13c and the side wall 13b (see FIG. 2 is prevented from adhering to the magnetic tape T held in the region 13A) and wound around the tape reel 17 by the partition wall 13c.

In addition, this invention is not limited to embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.
For example, the insertion hole 25 provided in the lower half 13 is not limited to the configuration provided in the region 13A as in the above embodiment, and may be a portion between the side wall 13b and the partition wall 13c as shown in FIG. The region 13B or the region 13C may be provided.
Moreover, it is not limited to the structure which provides only one penetration hole 25 like the said embodiment, You may provide two or more penetration holes not only in the area | region 13A but in the area | region 13B and the area | region 13C. At this time, a plurality of caulking pins may be provided on the upper half so as to be inserted through these insertion holes.

It is a disassembled perspective view which shows one Embodiment of a magnetic tape cartridge. It is a top view of a lower case. It is a figure which shows the state before crimping the crimping pin of an upper half and the insertion hole of a lower half. It is a figure which shows the state which crimped the crimping pin of the upper half with the insertion hole of the lower half.

Explanation of symbols

10 Magnetic Tape Cartridge 11 Cartridge Case 12 Upper Half 13 Lower Half 17 Tape Reel 24 Clamping Pin 25 Insertion Hole

Claims (2)

A cartridge case consisting of an upper half and a lower half;
A magnetic tape cartridge that is housed in the cartridge case and includes a tape reel wound with a magnetic tape,
One of the upper half and the lower half is provided with a crimping pin that protrudes toward the tape reel, and the other is inserted with the crimping pin in a state where the upper half and the lower half are combined. Possible insertion holes are provided for caulking the upper half and the lower half by deforming the tip of the inserted caulking pin, and side walls are formed on the peripheral edges of the upper half and the lower half, respectively. A partition wall is formed to partition the side wall and the tape reel, and the insertion hole is provided in a region between the side wall of the upper half or the lower half and the partition wall. Magnetic tape cartridge.   2. The magnetic tape cartridge according to claim 1, wherein a tip end portion of the caulking pin is welded to the inside of the insertion hole by heat welding or ultrasonic welding.

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