JP2000231773A - Magnetic tape cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase reliability by preventing an insertion guiding section for guiding a leader pin provided in an opening part from being deformed by shocks during falling. SOLUTION: This cartridge is provided with a cartridge case 4 for rotatably housing a single reel having a magnetic tape wound thereon, and an insertion guiding section 21 which guides the end part of the drawing member 5 to an opening part 10 where a drawing member 5 fixed to the tip of the magnetic tape is inserted/pulled out, by making thin a case wall surface, is formed. In this case, a part of the height direction of the side end part of the insertion guiding part 21 is formed in a curved surface 21a to increase rigidity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape cartridge, and more particularly, to a cartridge case in which a single reel having a magnetic tape wound thereon is rotatably accommodated, and the magnetic tape is pulled out to the tip of the magnetic tape. Tape cartridge to which a drawer member such as a leader pin is fixedly attached, relates to a structure of a case opening portion for putting the drawer member in and out.

[0002]

2. Description of the Related Art Conventionally, a magnetic tape cartridge used as a recording medium used in an external storage device such as a computer has a magnetic tape wound around a single reel.
A type in which this reel is rotatably housed in a cartridge case is known. Since this magnetic tape is used for data storage of a computer or the like and stores important information, it is configured so that troubles such as tape jamming do not occur and the magnetic tape is not pulled out carelessly. I have.

A drawer member such as a leader pin is fixed to the leading end of the magnetic tape, and the drive device is configured to pull out the drawer member on the recording / reproducing apparatus side to wind or rewind the magnetic tape. You. The drawer member is inserted and removed from an opening of the cartridge case, and the opening has an insertion guide portion for thinning the case wall and guiding the end of the drawer member.
It is preferable to provide the drawer so that the drawer can be easily taken in and out.

[0004]

However, in the above-described magnetic tape cartridge, there is a possibility that the insertion guide portion is deformed by an impact when the magnetic tape cartridge is dropped and becomes unusable.

That is, as illustrated in FIG. 15, an opening 10 for taking in and out the pull-out member 5 (leader pin) fixed to the tip of the magnetic tape 6 in the cartridge case 4 is formed at a corner of the substantially rectangular case 4. An opening is formed in a side surface near the portion 4a, and a concave storage portion 20 into which the end of the extraction member 5 is inserted and locked is provided on the upper and lower wall surfaces inside the opening portion 10, and the opening from the storage portion 20 is provided. An insertion guide portion 21 is provided in an invitation structure tapered toward the end, and guides the end of the extraction member 5 during storage. The thin insertion guide 21 is located near the case corner 4a,
When the corner 4a (ridge) falls downward, that is, when a drop impact acts so as to directly hit the corner 4a, a shock wave propagates from the corner 4a to the upper and lower wall surfaces of the opening 10, The insertion guide portion 21 whose strength is reduced is buckled and deformed as shown by a chain line, and a convex portion is formed on the outer surface so that the insertion guide portion 21 cannot be loaded into the drive device. Cannot be performed, and the draw-out member 5 cannot be normally taken in and out, so that the magnetic tape cartridge cannot be used.

Further, since the pull-out member 5 is pulled out from the opening 10 by engagement of the drive-side take-out mechanism, the region in the case near this opening 10 is to avoid interference with the take-out mechanism and to be magnetic. In order to secure the running area of the tape 6, it is difficult to arrange a connecting portion for fastening the upper and lower cases 2 and 3 with screws or the like in the vicinity of the corner 4a near the opening 10; This is disadvantageous in that the rigidity is reduced and the strength against drop impact as described above is increased.

The present invention has been made in view of the above points, and provides a magnetic tape cartridge in which the insertion guide portion provided in an opening is prevented from being deformed by an impact at the time of dropping or the like, thereby ensuring reliability. It is something you want to do.

[0008]

According to the present invention, there is provided a magnetic tape cartridge comprising a cartridge case rotatably accommodating a single reel on which a magnetic tape is wound. An opening is provided at the leading end of the tape through which a pull-out member fixed to pull out the magnetic tape is inserted and withdrawn, and an insertion guide portion is formed in this opening to thin the case wall and guide the end of the pull-out member. In the above structure, a part of the insertion guide portion in a height direction of a side end portion is formed as a curved surface or a slope. In addition, the above-mentioned curved surface or slope is
It is desirable to provide the insertion guide at a height of at least 1/2 or more of the side end.

It is preferable that the end of the pull-out member is formed into a curved surface or a slope in accordance with the shape of the side end of the insertion guide. Further, the end portion of the pull-out member may be formed to have a smaller diameter than the outer diameter of the magnetic tape connection portion, and the insertion guide portion may be reduced. The curved surface or inclined surface at the end of the insertion guide may be formed by arranging a number of ribs.

[0010] Another magnetic tape cartridge of the present invention comprises:
The upper and lower case side walls of the cartridge case near the insertion guide are fixed to each other.

The upper and lower case side walls can be fixed by bonding with an adhesive, heat welding by ultrasonic welding or the like, locking by an engaging member such as an elastic claw, or the like.

Still another magnetic tape cartridge according to the present invention is characterized in that a reinforcing member made of a metal member or the like is provided by insert molding at the bottom of a door rail of a sliding door that slides and opens and closes an opening. It is.

The reinforcing member is preferably a metal member having an L-shaped end, and the end is preferably inserted into a side wall of the cartridge case.

Another magnetic tape cartridge of the present invention comprises:
A groove for absorbing a shock by reducing the thickness of the wall of the case is formed between the insertion guide and the corner of the cartridge case. This groove has a V-shaped cross section,
It is formed by a U groove or the like.

According to still another magnetic tape cartridge of the present invention, a lock member for locking and holding the pull-out member is installed at a portion other than between the insertion guide portion and the corner portion of the cartridge case. The thickness of the wall surface of the case at the portion between the corners is increased.

The lock member may be provided at a position distant from the corner of the case so that, for example, a wire spring is fixed by thermal caulking.

According to another magnetic tape cartridge of the present invention,
The sliding door for slidingly opening and closing the opening is formed by cutting out a corner of the leading end of the sliding door, and increasing the thickness of the sliding door sliding portion on the corner side of the cartridge case.

[0018]

According to the present invention as described above, the insertion guide portion for guiding the end of the drawer member fixed to the tip of the magnetic tape is formed at the opening of the cartridge case.
Either the side end of the insertion guide is formed into a curved surface or a slope, the upper and lower case side walls near the insertion guide are fixed to each other, the reinforcing member is insert-molded at the bottom of the door rail, or the insertion guide and the cartridge case are used. A groove is formed between the insertion guide and the corner of the cartridge case. By increasing the rigidity or increasing the thickness of the sliding door sliding part on the corner side of the cartridge case by cutting out the corner of the sliding door tip,
Buckling deformation of the insertion guide due to a drop impact when the case corner falls down can be prevented, and the loadability to the drive device and the reliability of the guide operation of the drawer member can be improved.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

<First Embodiment> FIG. 1 is a perspective view showing the outer appearance of a magnetic tape cartridge according to this embodiment, FIG. 2 is a front view of a main part of an opening with a slide door opened, and FIG. FIG. 4 is a front view, a cross-sectional side view, and a main part front view of the insertion guide section in the vicinity of the opening along the line XX of FIG.

The magnetic tape cartridge 1 includes an upper case 2
A single reel (shown in FIG. 3) in which a magnetic tape 6 (see FIG. 3) having a leader pin 5 as a pull-out member fixed to the tip thereof is wound in a cartridge case 4 in which the lower case 3 is fastened by screws or the like. ) Are rotatably accommodated.
A magnetic tape 6 is provided on one side wall of the cartridge case 4.
An opening 10 for pulling out the opening 1 is formed.
0 is opened and closed by the sliding door 11 urged in the closing direction.

When the magnetic tape cartridge 1 is not in use, the leader pin 5 at the leading end is engaged with the concave storage portion 20 formed near the opening 10 with the magnetic tape 6 completely wound on the reel. Is done. An insertion guide portion 21 (guide surface) formed in an inviting structure toward the opening portion 10 is connected to the storage portion 20 so as to guide the end of the leader pin 5 toward the storage portion 20 at the back. Is formed. In addition, door rails 12 on which the slide door 11 moves are provided in upper and lower cases 2 and 3 inside the opening 10.
(Sliding grooves) are formed.

The leader pin 5 is held and pulled in by a recording / reproducing apparatus using the magnetic tape cartridge 1 to introduce the magnetic tape 6 into a tape running path in the apparatus. A lock member 7 (see FIG. 3) is provided by a spring member which is detachably held in the apparatus. A part of both ends of the insertion guide part 21 and both ends of the leader pin 5 is a curved surface (R shape).
Is formed.

As shown in FIG. 2, the leader pin 5 has a small-diameter narrow shaft clamp portion 51 at the center for clamping the tip of the magnetic tape 6 by fitting a clamp member 55 having a C-shaped cross section (see FIG. 3). Plate-like upper and lower flange portions 52 are provided on both upper and lower sides of the fine shaft clamp portion 51, and thin engaging portions 53 which are engaged and held from above and below the upper and lower flange portions 52 from the recording / reproducing apparatus side. 53 are formed to extend in the axial direction, and fixed at both ends to fixing portions 54 and 5 for fixing the case.
4 are formed. The clamp member 55 is a resin molded product, and elastically fits on the narrow shaft clamp portion 51 with the magnetic tape 6 interposed therebetween to connect the leader pin 5 and the magnetic tape 6.

The fixing portions 5 at both ends of the leader pin 5
4 and 54 are guided by insertion guides 21 formed on the inner walls of the upper and lower cases 2 and 3 in the vicinity of the opening 10, and the internal storage 20
, Respectively, and both ends fixed portions 54, 54 are detachably held by a lock member 7 of a leaf spring sandwiched between the upper and lower cases 2, 3.

The lock member 7 is vertically integrated, and a plate-like mounting portion 7a has a spring holding portion 13 (FIG. 3) along the case wall.
Arm 7b extending toward the opening 10 at the upper and lower ends of the tip of the mounting portion 7a. A holding portion 7c is provided at the tip of the arm 7b. 7c contacts the fixing portion 54 of the leader pin 5. The holding portion 7c is provided in a chevron shape protruding toward the leader pin 5 side. The holding portion 7c deforms by contacting the leader pin 5 inserted and moved from the opening 10 on the slope on the tip side, and the leader pin 5 is inserted into the storage portion 20 on the slope on the inner side. Is pressed and held.

In the opening 10 of the cartridge case 1, the storage section 20 is provided with a vertical interval equal to the length of the leader pin 5. The insertion guide portion 21 formed from the storage portion 20 to the opening end so as to widen the vertical interval and width from the storage portion 20 toward the opening portion 10 has a tapered shape in which the tip portion has a thinner case wall surface of the upper and lower cases 2 and 3. It is composed of an inclined surface. A door rail 12 along which the slide door 11 opens and closes slides across the insertion guide portion 21, and an inclined surface of the insertion guide portion 21 is formed from near the outer end of the door rail 12. In addition,
The surface of the insertion guide portion 21 is formed to be the same or slightly lower than the bottom surface of the door rail 12.

The slide door 11 is provided at its tip with a projection 11a projecting outwardly, and an opening operation member on the recording / reproducing apparatus side is engaged with the projection 11a to open the slide door 11. It is provided to operate.

Then, as shown in FIG. 4A, the insertion guide portion 2 of the opening 10 in the upper and lower cases 2 and 3 is formed.
Part of both end portions of the insertion guide portion 21 is preferably provided with a curved surface 21a (R shape), and preferably both ends of the insertion guide portion 21 at the open end are thicker by the curved surface 21a. It is formed to increase rigidity and reduce stress concentration.

Further, as shown in FIG. 4C, the tip corner of the end fixing portion 54 of the leader pin 5 is also formed in a curved surface 54a (R shape) in conformity with the curved surface 21a of the insertion guide portion 21. . The curved surface 54a is formed such that a cylindrical surface 54b remains near the engaging portion 53 of the fixing portion 54, and a flat surface remains at the center of the end surface. Further, as shown in FIG. 4 (B), the peripheral portion of the storage section 20 also has a curved surface 54 of the leader pin 5.
It is formed on a curved surface according to a.

FIG. 5 shows another embodiment of the present embodiment, wherein the entire insertion guide portion 21 of the opening 10 in the upper and lower cases 2 and 3 is provided on a curved surface 21a as shown in FIG. . In addition, the tip of the fixing portion 54 of the leader pin 5 also matches the curved surface 21a of the insertion guide 21 as shown in FIG.
As described above, the entire end face is formed into a curved face 54a (R shape) except for the cylindrical face 54b on the engagement portion 53 side. further,
The bottom surface of the storage unit 20 is also a curved surface 54a of the leader pin 5.
It is formed in a curved surface according to.

FIG. 6 shows another mode of the leader pin 5, in which the curved surface 54a of the fixing portion 54 at the end is formed up to the portion on the engaging portion 53 side, that is, without providing the cylindrical surface 54b. is there. In FIG. 6A, a curved surface 54a is formed such that a flat surface remains on the end surface, and in FIG. 6B, the entire surface is formed on the curved surface 54a. Others are provided similarly to the above.

FIG. 7 shows still another embodiment of the present embodiment, wherein the width of the insertion guide portion 21 of the opening 10 in the upper and lower cases 2 and 3 is formed to be small, and the insertion guide portion 21 at the opening end is further reduced. Rigidity is increasing.

Both ends of the insertion guide 21 are provided on the curved surface 21a (R shape) in the same manner as described above.
As shown in FIG. 7B, the outer diameter of the fixing portion 54 of the leader pin 5 is formed smaller than the outer diameters of the flange portion 52 and the clamp member 55 (magnetic tape connection portion), and the distal end of the fixing portion 54 is engaged. The entire end surface is formed as a curved surface 54a except for the cylindrical surface 54b on the joining portion 53 side. Further, the size of the storage section 20 is small, and the bottom surface portion is formed in a curved surface.

FIG. 8 shows another embodiment of the present embodiment. Both ends of the insertion guide portion 21 of the opening 10 in the upper and lower cases 2 and 3 are provided on an inclined surface 21b.
Also, as shown in FIG.
4 has an inclined surface 54 corresponding to the inclined surface 21b of the insertion guide portion 21 except for the cylindrical surface 54b on the engagement portion 53 side.
c. Further, the peripheral portion of the storage section 20 is also formed on an inclined surface in accordance with the inclined surface 54c of the leader pin 5.

Although not shown, the curved surface 21a and the inclined surface 21b of the insertion guide portion 21 as described above are provided on both sides of the insertion guide portion 21 with a plurality of end surfaces having the curved surface or the inclined surface as described above. May be formed by disposing the ribs.

In the cartridge case 1 of the present embodiment,
When the leader pin 5 pulled out from the opening 10 opened by the slide door 11 is stored in the cartridge case 4 in response to the rewinding of the magnetic tape 6, even if the position is shifted from the storage unit 20, The end face of the fixing portion 54 of the leader pin 5 is guided while being corrected in position by contacting the insertion guide portion 21, drawn into the internal storage portion 20 and held by the lock member 7, and the slide door 11 is closed and the opening portion is opened. 10 to prevent dust from entering. And
Even if the magnetic tape cartridge 1 falls when the corner 4a near the opening 10 is lowered during transportation or the like, the rigidity is increased by forming both sides of the insertion guide portion 21 into a curved shape or a sloped shape, so that the insertion can be performed. The buckling deformation of the guide portion 21 is prevented.

<Second Embodiment> FIG. 9 is a sectional front view of a main part of a case of a magnetic tape cartridge according to this embodiment.

The basic structure of the upper and lower cases 2 and 3 and the leader pin 5 of this example is the same as the structure of the first embodiment or the structure shown in FIG. A few side walls are fixed to each other to increase rigidity.

That is, an insertion guide 21 is formed in the opening 10 of the cartridge case 4, and the side walls 2 a and 2 a of the upper case 2 and the lower case 3 near the insertion guide 21.
Elastic claws 14 (engaging members) project downward from the abutting surface on the inner surface of the side wall 2a of the upper case 2 at the abutting portion of the upper case 2 while engaging with the inner surface of the side wall 3a of the lower case 3. Joint recess 1
5, the upper and lower cases 2 and 3 are assembled, and the elastic claws 14 are engaged with the engaging recesses 15 so that the upper case 2 and the lower case are fixed in the vicinity of the opening 10.

As another mode of the present embodiment, the contact portions of the side walls 2a and 3a of the upper case 2 and the lower case 3 near the insertion guide portion 21 are bonded without using the elastic claws 14. Adhesive, heat welding by ultrasonic welding, etc.
The rigidity may be increased.

According to the present embodiment, in the vicinity of the opening 10 of the cartridge case 4, particularly in the vicinity of the insertion guide 21,
Side walls 2a and 3a of upper and lower cases 2 and 3 at positions away from a portion where upper case 2 and lower case 3 are fastened with screws.
Is fixed by bonding, welding, locking or the like, the rigidity in the vicinity of the insertion guide portion 21 is increased, the drop strength is improved, and buckling deformation of the insertion guide portion 21 can be prevented.

<Third Embodiment> FIG. 10 is a plan view of an essential part of the magnetic tape cartridge of this embodiment with an upper case removed, and FIG. 11 is a sectional view taken along the line Y--Y of FIG.

The basic structure of the upper and lower cases 2 and 3 and the leader pin 5 in this example is the same as that of the first embodiment or the structure shown in FIG. 15, and the rigidity of the door rail 12 near the opening 10 is reduced. Is increasing.

That is, a metal member 16 (reinforcing member) is provided at the bottom of the door rail 12 on which the sliding door 11 for opening and closing the opening 10 slides by insert molding when the upper and lower cases 2 and 3 are formed. The vicinity of the portion 21 is reinforced. The opening end of the illustrated insertion guide portion 21 is formed at a position inside the outer surfaces of the upper and lower cases 2 and 3.

The metal member 16 is formed of a metal plate such as stainless steel. The end 16a is bent in an L-shape, and the end 16a is inserted into the side wall 3a of the cartridge case 4.

According to the present embodiment, the door rail 16 of the opening 10 of the cartridge case 4 is reinforced by insert molding of the metal member 16, the rigidity near the insertion guide 21 is increased, and the drop strength is improved. Insertion guide 21
Buckling deformation can be prevented.

<Fourth Embodiment> FIG. 12 is a plan view of an essential part of the magnetic tape cartridge of this embodiment with an upper case removed.

The basic structure of the upper and lower cases 2 and 3 and the leader pin 5 of this example is the same as that of the first embodiment or the structure shown in FIG. A groove 17 for reducing the thickness of the wall of the case and absorbing an impact is formed between the corner 4a.

That is, the groove 17 is provided in the lower case 3
A vertical groove 17a is formed between the insertion guide portion 21 of the upper case 2 and the corner portion 4a so as to extend in the vertical direction on the inner surface of the wall surface where the opening 10 is opened. And a vertical groove 17c formed in the inner surface of the side wall orthogonal to the opening 10 and extending vertically. Each of the grooves 17a to 17c is formed in a concave shape with a V-shaped cross section. The thickness of the case wall is reduced to absorb the shock transmitted from the corner 4a and prevent the insertion guide 21 from buckling. If the drop impact is excessive, the groove 1
7 is deformed or a crack is generated to absorb an impact and prevent the insertion guide 21 from being broken.

The cross-sectional shape of the groove 17 may be a U-groove structure instead of the V-groove, and its depth, width and the like are designed according to the shape of the insertion guide 21 and the material of the cartridge case 4. You.

<Fifth Embodiment> FIG. 13 is a plan view of an essential part of a magnetic tape cartridge according to this embodiment with an upper case removed.

The basic structure of the upper and lower cases 2 and 3 and the leader pin 5 in this example is the same as that of the first embodiment or the structure shown in FIG. 15, and the cartridge case near the corner 4a side of the opening 10 is provided. 4 has increased rigidity.

That is, the lock member 18 that locks and holds the leader pin 5 is provided between the insertion guide 21 in the lower case 3 (the same applies to the upper case 2) and the corner 4 of the cartridge case 4.
a, the bottom wall 3d between the insertion guide 21 and the corner 4a of the cartridge case 4 is thickened, and the rigidity is increased. Is increasing.

The lock member 18 is composed of a wire spring and is separated into upper and lower parts. A curved mounting portion 18a is fixed to the lower case 3 by heat caulking due to melting of the mounting boss 19, and
A mountain-shaped holding portion 18c is connected to the tip of an arm portion 18b extending from 8a toward the opening portion 10. The holding portion 18c contacts the fixing portion 54 of the leader pin 5, and presses and holds the leader pin 5 in the storage portion 20. It has become.

According to the present embodiment, by changing the arrangement position of the lock member 18, the thickness of the case wall near the corner 4a and the insertion guide portion 21 is increased to increase the rigidity and the drop strength. The buckling deformation of the insertion guide portion 21 can be prevented.

<Sixth Embodiment> FIG. 14 is a perspective view of a main part of a magnetic tape cartridge according to this embodiment.

The basic structure of the upper and lower cases 2 and 3 and the leader pins 5 and the like in this example is the same as that of the first embodiment or the structure shown in FIG. 15, and the cartridge case 4 near the corner 4a of the opening 10 is formed. To increase the rigidity.

That is, the corner 11b of the tip of the slide door 11 that slides and opens and closes the opening 10 is cut off, while the corner 4a of the insertion guide 21 in the lower case 3 (the same applies to the upper case 2) is concave. Is not formed, and the thickness of the sliding door sliding portion 3e near the corner 4a is increased to increase rigidity.

According to the present embodiment, the sliding door 11
Further, by changing the shape of the door rail 12, the thickness of the sliding door sliding portion 3e near the corner portion 4a is increased to increase rigidity, the drop strength is improved, and the buckling deformation of the insertion guide portion 21 can be prevented.

The structures for improving the rigidity in the above embodiments may be provided in combination.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a magnetic tape cartridge according to a first embodiment of the present invention.

FIG. 2 is a front view of the vicinity of an opening of the cartridge case with a sliding door opened.

FIG. 3 is a cross-sectional plan view near the opening along the line XX in FIG. 2;

FIG. 4 is a front view, a cross-sectional side view, and a main part front view of a pull-out member of an insertion guide unit.

FIG. 5 is a front view of an insertion guide and a front view of a main part of a pull-out member, showing another mode in the first embodiment.

FIG. 6 is an essential part front view of a drawer member showing still another mode in the first embodiment.

FIG. 7 is a front view of an insertion guide and a front view of a main part of a pull-out member, showing another aspect of the first embodiment.

FIG. 8 is a front view of an insertion guide and a front view of a main part of a pull-out member, showing still another mode in the first embodiment.

FIG. 9 is a sectional front view of a main part of a case of a magnetic tape cartridge according to a second embodiment;

FIG. 10 is a plan view of a main part of the magnetic tape cartridge according to the third embodiment with the upper case removed.

11 is a sectional front view taken along the line YY in FIG. 10;

FIG. 12 is an essential part plan view showing a state where an upper case of a magnetic tape cartridge according to a fourth embodiment is removed;

FIG. 13 is an essential part plan view showing a state where an upper case of a magnetic tape cartridge according to a fifth embodiment is removed;

FIG. 14 is a perspective view of a main part of a magnetic tape cartridge according to a sixth embodiment.

FIG. 15 is a perspective view of a main part of a conventional cartridge case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic tape cartridge 2 Upper case 3 Lower case 4 Cartridge case 4a Case corner 5 Leader pin (drawing member) 6 Magnetic tape 7,18 Lock member 10 Opening 11 Slide door 12 Door rail 14 Elastic claw (engaging member) 15 Engage Concave part 16 Metal member (reinforcing member) 17 Groove part 20 Storage part 21 Insertion guide part 21a Curved surface 21b Slope 54 Fixed part 54a Curved surface 54b Slope

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiyoo Morita 2-12-1, Ogimachi, Odawara City, Kanagawa Prefecture Inside Fuji Photo Film Co., Ltd. (72) Daisuke Takahashi 2-12-1, Ogimachi, Odawara City, Kanagawa Prefecture Inside Fuji Photo Film Co., Ltd. (72) Inventor Takuji Oku 2-12-1 Ogimachi, Odawara City, Kanagawa Prefecture Inside Fuji Photo Film Co., Ltd.

Claims (8)

[Claims] 1. A cartridge case for rotatably accommodating a single reel on which a magnetic tape is wound, and a drawer member fixed to a leading end of the magnetic tape for pulling out the magnetic tape. In a magnetic tape cartridge, an opening for taking in and out is opened, and an insertion guide for guiding the end of the drawer member by thinning the case wall is formed in the opening. A magnetic tape cartridge characterized in that a part of the portion in the height direction is formed on a curved surface or an inclined surface. 2. The magnetic tape cartridge according to claim 1, wherein an end of the pull-out member is formed into a curved surface or a slope in accordance with a shape of a side end of the insertion guide. 3. An end of the pull-out member having a diameter smaller than an outer diameter of the magnetic tape connecting portion.
A magnetic tape cartridge according to claim 1. 4. A cartridge case for rotatably accommodating a single reel on which a magnetic tape is wound, wherein the cartridge case has a draw-out member fixed to a leading end of the magnetic tape for drawing out the magnetic tape. A magnetic tape cartridge having an opening through which an insertion / removal opening is formed, and an insertion guide for thinning the case wall and guiding an end of the drawer member is formed in the opening, wherein a cartridge case near the insertion guide is provided. A magnetic tape cartridge characterized in that upper and lower case side walls are fixed to each other. 5. A cartridge case for rotatably accommodating a single reel on which a magnetic tape is wound, wherein the cartridge case has a draw-out member fixed to a tip of the magnetic tape for drawing out the magnetic tape. A magnetic tape cartridge having an opening through which an insertion / removal opening is formed, and an insertion guide for thinning the case wall and guiding the end of the drawer member is formed in the opening. A magnetic tape cartridge wherein a reinforcing member such as a metal member is provided at the bottom of a door rail of a door by insert molding. 6. A cartridge case for rotatably accommodating a single reel on which a magnetic tape is wound, wherein the cartridge case has a pull-out member fixed to a leading end of the magnetic tape for pulling out the magnetic tape. In a magnetic tape cartridge, an opening to be taken in and out is opened, and an insertion guide for guiding an end of a drawer member by thinning a case wall is formed in the opening, and a corner between the insertion guide and the cartridge case is provided. Between the department
A magnetic tape cartridge characterized in that a case wall is formed to have a groove for absorbing a shock by reducing the thickness of a case wall. 7. A cartridge case for rotatably accommodating a single reel around which a magnetic tape is wound, wherein the cartridge case has a draw-out member fixed to a tip of the magnetic tape for drawing out the magnetic tape. A magnetic tape cartridge having an opening through which an insertion / removal opening is formed, and an insertion guide portion for guiding an end of the extraction member by thinning a case wall surface in the opening, wherein the lock for locking and holding the extraction member is provided. The member is installed in a portion other than between the insertion guide portion and the corner of the cartridge case, and the thickness of the case wall at the portion between the insertion guide portion and the corner of the cartridge case is increased. Magnetic tape cartridge. 8. A cartridge case for rotatably accommodating a single reel on which a magnetic tape is wound, wherein the cartridge case has a draw-out member fixed to a tip of the magnetic tape for drawing out the magnetic tape. A magnetic tape cartridge having an opening through which an insertion / removal opening is formed, and an insertion guide for thinning the case wall and guiding the end of the drawer member is formed in the opening. A magnetic tape cartridge characterized in that a corner of a front end of a door is cut out, and a thickness of a sliding door sliding portion on a corner side of a cartridge case is increased.