JP2001118357A - Tape cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably clamp one end part of a tape-shaped recording medium such as a magnetic tape. SOLUTION: This tape cartridge is provided with the tape-shaped recording medium to which a tape drawing out member 9 with which the tape drawing out mechanism of a recording and reproducing device is engaged is attached at one end, a tape reel 6 to which the other end of the tape-shaped recording medium is attached and on which the tape-shaped recording medium is wound, and a cartridge main body 2 where the reel 6 is housed in a rotatable way and an opening part 10 for tape extraction which the member 9 is made to face to the outside is formed on one side face. The member 9 has a leader pin 36 on which one end of the tape-shaped recording medium is wound and a clamp member 35 consisting of a clamping part 38 that clamps the tape-shaped recording medium on the pin 36 and a flexible part 37 formed inside the part 38 and integrally with the part 38.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape-like recording medium, in which a tape pull-out member to which a tape pull-out mechanism of a recording and reproducing apparatus is engaged is attached to one end of the tape-like recording medium. The present invention relates to a tape cartridge housed in a main body, and more particularly to an improvement in a tape pull-out member attached to one end of a tape-shaped recording medium.

[0002]

2. Description of the Related Art Conventionally, a tape cartridge using a magnetic tape as a recording medium is provided at one end with a tape pull-out member to which a tape pull-out mechanism of a recording / reproducing apparatus is engaged. This magnetic tape is wound around a tape reel. There is a tape cartridge in which this tape reel is rotatably stored in a cartridge body. When this tape cartridge is loaded into a recording / reproducing apparatus, a tape pulling mechanism of the recording / reproducing apparatus is engaged with a tape pulling member, and the tape pulling mechanism guides the magnetic tape into the rotary magnetic head device, and Is wound on a take-up reel provided in the recording / reproducing apparatus, whereby information signals are recorded / reproduced on / from the magnetic tape.

As shown in FIG. 18, a tape pull-out member 110 used in such a tape cartridge and engaged with a tape pull-out mechanism for pulling out a magnetic tape in a recording / reproducing apparatus has one end of the magnetic tape wound thereon. Leader pin 111 and an elastic member 112 fitted in the leader pin 111 to anchor the magnetic tape to the leader pin 111.
And a clamp member 113 which is fitted from the outside of the elastic member 112 and clamps the magnetic tape to the leader pin 111 via the elastic member 112.

The elastic member 112 and the clamp member 113
Both are formed in a substantially C-shaped cross section, and a leader pin 1 is partially formed.
Openings 114 and 115 for press-fitting 11 are formed. In addition, the clamp member 113 is
Is formed to be larger than the elastic member 112 so as to cover the elastic member 112. Then, as shown in FIG. 19, after winding one end of the magnetic tape around the leader pin 111, the leader pin 111 around which the magnetic tape is wound is attached to the elastic member 1.
12, the leader pin 111 to which the elastic member 112 is attached is press-fitted from the opening 115 of the clamp member 113. In such a tape pull-out member 110, one end of the magnetic tape wound around the leader pin 111 is first covered with the elastic member 112, and the magnetic tape is clamped from above by a clamp member 113 to hold one end of the magnetic tape. I have. Tape pull-out member 110
In the case where the magnetic tape is pulled by the tape pull-out mechanism of the recording / reproducing apparatus, the opening 114 of the elastic member 112
The displacement of the vicinity prevents the magnetic tape from slipping off.

[0005]

However, the tape pull-out member 11 used in the above-described tape cartridge is not limited.
Reference numeral 0 indicates that one end of the magnetic tape wound around the leader pin 111 is clamped by two kinds of members, an elastic member 112 and a clamp member 113. Therefore, these elastic members 1
12 or the stress applied to the clamp member 113 or the elastic member 11
A gap is formed between the clamp member 113 and the elastic member 112 due to a dimensional change or an aging change due to sliding friction between the tape member 2 and the clamp member 113, and the tape pull-out member 110 has a weak clamping force and the magnetic tape may come off. there were.

Further, since the elastic member 112 and the clamp member 113 are separate members, the tape pull-out member 110 requires two assembling steps, so that the production efficiency cannot be further improved.

It is therefore an object of the present invention to provide a tape cartridge having a tape pull-out member capable of securely clamping one end of a tape-shaped recording medium such as a magnetic tape.

[0008]

In order to solve the above-mentioned problems, a tape cartridge according to the present invention has a tape-like shape in which a tape pull-out member to which a tape pull-out mechanism of a recording / reproducing apparatus is engaged is attached. A recording medium, a tape reel on which the other end of the tape-shaped recording medium is attached, the tape reel around which the tape-shaped recording medium is wound, and the tape reel are rotatably housed, and the tape pull-out member is outwardly mounted on one side. A cartridge main body having a tape pull-out opening formed so as to face the tape-like recording medium, wherein the tape pull-out member clamps the tape-like recording medium to the leader pin around which one end of the tape-like recording medium is wound. And a clamp member including an elastic portion formed integrally with the clamp portion on an inner surface of the clamp portion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a tape cartridge to which the present invention is applied will be described with reference to the drawings. As shown in FIGS. 1, 2 and 3, the tape cartridge 1 includes a cartridge body 2 in which a pair of upper and lower halves 3 and 4 are butt-connected to each other, and a tape reel 6 around which a magnetic tape 5 is wound is housed. Become. This tape cartridge 1
Is inserted into the recording and / or reproducing apparatus 44, the tape pull-out member 9 on which the magnetic tape 5 is clamped is pulled out by the tape pull-out mechanism on the recording and / or reproducing apparatus 44 side, and the recording and / or reproducing apparatus 44 The magnetic tape 5 travels by being guided to a take-up reel inside the take-up reel.

As shown in FIGS. 3 and 4, the upper and lower halves 3 and 4 constituting the cartridge body 2 are formed in a substantially rectangular shape by injection molding of a synthetic resin such as an ABS resin. The upper and lower halves 3 and 4 are formed in such a size that the tape reel 6 around which the magnetic tape 5 is wound when the cartridge body 2 is formed is inscribed. The upper and lower halves 3 and 4 are provided with upright walls 3a and 4a which constitute the outer peripheral wall 2a when the upper and lower halves 3 and 4 abut against each other. The upper and lower halves 3 and 4 are formed with a plurality of substantially arc-shaped partition walls 22 so as to be inscribed in the rising walls 3a and 4a. When the upper and lower halves 3 and 4 are abutted to form the cartridge main body 2, a tape reel storage section 23 for storing the tape reel 6 is formed in the cartridge main body 2 by the outer peripheral wall 2 a and the partition wall 22. The partition walls 22 constituting the tape reel storage portion 23 are formed in the upper and lower halves 3 and 4, respectively, and are formed by abutting arc-shaped partition wall forming walls 22a inscribed in the upper half 3 and the lower half 4.

A drive shaft insertion hole 8 into which a drive shaft 52 for rotating the tape reel 6 on the recording / reproducing apparatus side is inserted is provided substantially in the center of the bottom plate 18 of the lower half 4 constituting the tape reel storage portion 23. Is formed.

As shown in FIG. 3, the tape reel 6 around which the magnetic tape 5 is wound and rotatably housed in the tape reel housing 23 of the cartridge body 2 has a reel hub 24 around which the magnetic tape 5 is wound. And a pair of flange portions 25 and 26 attached to both sides of the reel hub 24.
One end of the magnetic tape 5 is attached to the reel hub 24. As shown in FIGS. 3 and 5, the reel hub 24 is formed with a spring storage portion 28 that is open at an upper side and stores a coil spring 29. The coil spring 29 housed in the spring housing part 28 includes upper and lower halves 3, 4
Are joined, one end is in contact with the main surface of the upper half, and the other end is in contact with the bottom surface 28a of the spring storage portion 28, so that the tape reel 6 is biased toward the lower half 4 side. are doing.

Further, the reel hub 24 has an engagement portion 30 which is engaged with a drive shaft 52 of the recording and / or reproducing device 44 bulging out on the bottom surface 28a side. Engaging part 30
The lower half 4 of the reel hub 24 is
And is exposed outward from the drive shaft insertion hole 8. The flange portions 25 and 26 regulate the winding position of the magnetic tape 5 wound around the reel hub 24.

On the magnetic tape 5 wound around such a tape reel 6, information signals such as audio signals, video signals, and processing data processed by a computer are recorded. At the leading end of the magnetic tape 5 wound around the tape reel 6, a tape pull-out member 9 for pulling out the magnetic tape 5 to a recording and / or reproducing device 44 for recording or reproducing an information signal is attached. I have.

As shown in FIG. 6, the tape pull-out member 9 has a leader pin 36 around which the magnetic tape 5 is wound.
And a clamp member 35 for clamping the magnetic tape 5 to the leader pin 36.

A leader pin 36 is provided on a winding portion 36a around which the magnetic tape 5 is wound, and on both sides of the winding portion 36a, and a tape pull-out member 9 provided on one side surface of the cartridge body 2 is provided. Engagement portions 36b, 36b for holding in the vicinity of the portion 10, and regulating portions 36c, 36c for regulating the mounting position of the clamp member 35 and regulating the winding position of the magnetic tape 5. After the magnetic tape 5 is wound around the winding portion 36a, the magnetic tape 5 is clamped by being pressed into the clamp member 35. The engaging portions 36b, 36b are provided on the locking wall 1 formed near the tape pull-out opening 10 of the cartridge body 2.
5 is engaged. Regulators 36c, 36c
Is for regulating the winding position of the magnetic tape 5 and the clamping position of the clamp member 35, and is formed in a flange shape. The restricting portions 36c are provided on both sides of the winding portion 36a with an interval substantially equal to the width of the magnetic tape 5 and the clamp member 35. Therefore, leader pin 3
6, the magnetic tape 5 and the clamp member 35 wound around
Are locked by the regulating portions 36c, 36c, and the axial deviation on the winding portion 36a is prevented.

The magnetic tape 5 pressed into the leader pin 36
The clamp member 35 for clamping the magnetic tape 5 to the leader pin 36 includes a clamp portion 38 for clamping the magnetic tape 5 to the leader pin 36 and an elastic portion 37 integrally formed on the inner surface of the clamp portion 38. Clamp part 38
Is formed by bending a thin metal plate or a leaf spring into a substantially C-shape, or by injection-molding a rigid elastic resin, and has an opening 39 for press-fitting the leader pin 36 in the longitudinal direction. Are formed. In addition, this clamp portion 38
Is formed so as to be elastically displaced in a direction in which the diameter is expanded so that the leader pin 36 can be press-fitted. On the inner surface side of the clamp portion 38, one or a plurality of protruding portions 31 constituting a convex portion are provided. The protruding portion 31 enhances the coupling force between the elastic portion 37 and the clamp portion 38 by engaging with the elastic portion 37, and at the same time, the clamp portion 38 and the elastic portion 3
7 are integrally molded, the elastic portion 37 is
Is prevented from shifting. Also, the clamp 3
The concave portion formed outside 8 functions as a positioning concave portion 41 when the clamp portion 38 is disposed in the cavity 63 of the molding die 62 for injection-molding the clamp member 35. Note that the protruding portion 31 may be formed so as to form a concave portion on the inner surface side of the clamp portion 38. Further, as shown in FIG. 7, the clamp portion 38 is provided with a coupling hole 42 in which an elastic portion is formed in order to increase a coupling force with the elastic portion 37. Since the elastic portion 37 is fixed in the coupling hole 42, the integration of the clamp portion 38 and the elastic portion 37 can be further strengthened. If the coupling of the clamp member 35 is strengthened, it becomes difficult to forcibly remove the mold included in the elastic portion 37. Therefore, the size of the protruding portion 31 and the number and size of the coupling holes 42 must be adjusted. Is desirable.

The elastic portion 37 is formed integrally with the inner surface of the clamp portion 38, and is formed by injection molding a synthetic resin material such as an elastomer resin having rubber elasticity at room temperature into a substantially C shape. The elastic part 37 has a leader pin 3
An opening 39 is formed for fitting 6. The opening 39 is formed so that the elastic portion 37 covers the opening end side of the clamp portion 38. Therefore, the clamp member 35 does not directly contact the magnetic tape 5 wound around the leader pin 36 with the clamp portion 38 made of a thin metal plate.
Is prevented from being damaged.

Then, the clamp member 35 including the clamp portion 38 and the elastic portion 37 is elastically displaced in the direction of increasing the diameter, so that the leader pin 36 around which the magnetic tape 5 is wound is pressed into the clamp member 35 to clamp the magnetic tape 5. I do. Therefore,
When the magnetic tape 5 is pulled by the tape pull-out mechanism of the recording and / or reproducing device 44, the clamp portion 38 of the clamp member 35 is elastically displaced in the direction in which the elastic portion 37 expands. Since the elastic portion 37 has rubber elasticity at room temperature, it has a large static friction force, and prevents the magnetic tape 5 from coming off the tape pull-out member 9. In addition, this clamp portion 3
8 is formed integrally with the elastic portion 37, the dimensional change from the elastic portion 37 does not occur even when the clamp portion 3 is used for a long time.
When the gap is formed between the magnetic tape 8 and the elastic portion 37, the clamping force is weakened and the magnetic tape 5 does not come off. In addition, since the clamp portion 38 and the elastic portion 37 are integrally formed, the clamp member 35 can be assembled only by a step of press-fitting the leader pin 36 into the clamp member 35 when assembling the tape pull-out member 9. The step of press-fitting the conventional elastic member and the clamp member can be omitted, and the production efficiency can be improved.

When the tape cartridge 1 is inserted into the recording and / or reproducing apparatus 44, the tape pull-out member 9 having the magnetic tape 5 having the above-mentioned configuration is mounted on the cartridge in the recording and / or reproducing apparatus 44. Attached to the unit. The tape withdrawing mechanism on the recording and / or reproducing device 44 side is engaged with the tape withdrawing member 9. Next, the tape pull-out member 9 is mounted on a magnetic tape take-up reel.
When the magnetic tape take-up reel is driven, the magnetic tape 5 travels in the recording and / or reproducing device 44.

As shown in FIG. 8, the tape pull-out member 9 attached to one end of the magnetic tape 5 is provided on one side of the cartridge main body 2 to be inserted into the recording and / or reproducing apparatus 44. It faces outward from the tape pull-out opening 10. This tape pull-out opening 10 is
As shown in FIG. 3, when the upper and lower halves 3 and 4 are butt-joined, the rising walls 3a and 4 of the upper and lower halves 3 and 4 are connected.
The cutouts 17 are formed in a.

As shown in FIG. 9, the tape pull-out opening 10 is formed to be slightly wider than between the side portions 15a of the locking wall 15 described later. Further, an inclined surface portion 11 is formed from the tape pull-out opening 10 to the locking wall 15, and the tape opening member 10 is wide open from the locking wall 15 to the tape pull-out opening 10. It can be guided to the locking wall 15 in the main body 2.

In the vicinity of the tape pull-out opening 10, a lid 13 that opens the tape pull-out opening 10 only when the tape cartridge 1 is mounted on the recording and / or reproducing device 44, and the magnetic tape 5 are moored. A holding portion for holding the tape pull-out member 9 to be held in the cartridge main body 2 is provided.

The holding portion comprises a locking wall 15 facing the tape pull-out opening 10, and this locking wall 15 is formed in a U-shape which opens the tape pull-out opening 10 side. . The locking wall 15 has a depth and a height that can hold the tape pull-out member 9. In addition, the locking wall 15
It is formed at substantially the same height as the engaging portion 36b of the leader pin 36 so as not to hinder the running of the magnetic tape 5.
The side surfaces 15a, 15a of the locking wall 15 are formed with a width substantially equal to the diameter of the engaging portion 36b of the tape pull-out member 9. Further, the rear surface 15b of the locking wall 15 is
6b is formed in an arc shape having substantially the same curvature.
Therefore, when the magnetic tape 5 is rewound into the cartridge main body 2, the locking wall 15 can reliably engage the engaging portion 36 b of the leader pin 36, and the tape pull-out member 9 can be used for pulling out the tape. It can be held near the opening 10.

A lid 1 for opening and closing the tape pull-out opening 10
As shown in FIGS. 8 and 9, 3 is supported by a rail 27 formed along the outer peripheral wall 2 a of the upper and lower halves 3 and 4 on the side of the tape pull-out opening 10. The lid 13 is
When the tape cartridge 1 is not mounted on the recording and / or reproducing device 44, the tape pull-out opening 10 is closed to prevent dust and the like from entering the cartridge main body 2. When the tape cartridge 1 is mounted in the recording and / or reproducing device 44, the tape pull-out opening 10 is opened by a door opening member provided on the recording and / or reproducing device 44 side.

The rail portion 27 for supporting the lid 13 is formed on the top plate 16 and the bottom plate 18 of the upper and lower halves 3 and 4 along the outer peripheral wall 2a on the tape drawing opening 10 side.

In the vicinity of each corner of the lower half 4,
When the tape cartridge 1 is inserted into the recording and / or reproducing apparatus 44, positioning holes 20 and 21 for positioning the cartridge main body 2 in the recording and / or reproducing apparatus 44 are formed. . Positioning holes 20, 2
1 is formed in a substantially circular shape, and is engaged with a positioning projection provided on the recording and / or reproducing device 44 side when the tape cartridge 1 is inserted into the recording and / or reproducing device 44.

A plurality of bosses 7 are provided in the vicinity of each corner except for the corners where the tape pull-out openings 10 of the upper and lower halves 3 and 4 are provided. The boss 7 is for fixing the upper and lower halves 3 and 4, and the upper and lower halves 3 and 4 are butt-joined by being screwed or the like.

When the tape cartridge 1 having the above configuration is not inserted into the recording and / or reproducing apparatus 44, as shown in FIGS. The tape pull-out member 9 with the magnetic tape 5 clamped in the tape cartridge 1 is held in the tape cartridge 1 by engaging the engaging portion 36b of the leader pin 36 with the locking wall 15 provided therein. The tape pull-out opening 10 is closed by a lid 13 so that dust and the like do not enter the cartridge body 2.

The tape cartridge 1 is used for recording and / or recording with one side provided with the tape pull-out opening 10 as an insertion end.
Or, when the cartridge body 2 is inserted into the reproducing device 44, as shown in FIG.
Cartridge mounting part 4 on the recording and / or reproducing device 44 side
8 engages with the positioning protrusions, thereby positioning the cartridge body 2 in the horizontal direction. The cartridge main body 2 is supported from above by a spring member 50 provided in the recording and / or reproducing device 44, and is fixed on the cartridge mounting portion 48 of the recording and / or reproducing device 44. Then, as shown in FIG.
Alternatively, the rotation drive engagement portion 45 of the rotation mechanism portion 49 connected to a drive motor (not shown) on the reproduction device 44 side
The tape reel 6 is pushed up in the direction of the upper half 3 against the urging force of the coil spring 29. Then, the drive shaft 52 is inserted into the drive shaft insertion opening 8. When the tape reel 6 is pushed up in the direction of the upper half 3, the flange portion 26 also rises from the bottom plate 18 of the lower half 4, so that the tape reel 6 is held in a rotatable state in the cartridge body 2. Thus, the tape reel 6 is rotated integrally with the drive shaft 52 rotated by the drive motor.

The tape withdrawing opening 10 of the cartridge main body 2 is provided with a cover 13 in which a recording and / or reproducing device 44 is provided.
Is opened by a door opening member (not shown) provided in
The tape pull-out member 9 faces outward. The tape pull-out member 9 is engaged with a tape pull-out mechanism provided in the recording and / or reproducing device 44, and winds the magnetic tape 5 around a take-up reel. At this time, when the tape pull-out member 9 is swept, a stress acts between the magnetic tape 5 and the clamp member 35. However, since the elastic portion 37 and the clamp portion 38 are integrally formed, the elastic portion 37 There is no dimensional change or aging due to sliding friction with the clamp portion 38. Therefore,
The magnetic tape 5 does not come off due to the deterioration of the clamping force of the clamp member 35. Then, following the tape pull-out member 9, the magnetic tape 5 is wound around a take-up reel,
By rotating the take-up reel, the magnetic tape 5 travels on the head, and information is written to and / or read from the magnetic tape 5.

Incidentally, the tape pull-out member 9 as described above
Is manufactured as follows. That is, first, as shown in FIG. 11A, the metal thin plate 60 constituting the clamp portion 38 is cut into a predetermined size, and as shown in FIG. The thin plate 60 is curved in a substantially C shape. At this time, a positioning concave portion 41 for positioning the metal thin plate 60 with the molding die 62 when the metal thin plate 60 is mounted on the molding die 62 is formed. When the positioning concave portion 41 is mounted on the molding die 62, the positioning concave portion 41 engages with the positioning projection 40 of the molding die 62, thereby positioning the mounting position.

The C-shaped thin plate 61 is
7 is mounted on a molding die 62 for forming the same. As shown in FIG. 11 (C), the molding die 62 includes a fixed die 6 on which a C-shaped thin plate 61 constituting the clamp portion 38 is disposed.
2a, a movable mold 62b for closing the fixed mold 62a,
The C-shaped thin plate 61 includes a punching die 62c that forms the elastic portion 37 on the inner surface. By forming such a molding die 62, the cavity 6 in which the C-shaped thin plate 61 is provided.
3 are configured. The cavity 63 formed in the fixed mold 62a is formed such that the side into which the C-shaped thin plate 61 is inserted is opened, and the inner surface on the bottom side opposed thereto is substantially the same as the curvature of the C-shaped thin plate 61. Have been. A positioning projection 40 is formed on the bottom of the cavity 63 so that the positioning recess 41 formed in the C-shaped thin plate 61 is engaged. The cavity 6 of such a fixed mold 62a
3, a C-shaped thin plate 61 is inserted with the positioning recess 41 side as an insertion end, and the positioning recess 41 is
It is arranged in a state of being engaged with.

The movable mold 62b is provided with a fixed mold 62a.
When the C-shaped thin plate 61 is attached to the cavity 63, the cavity 63 is closed. When the cavity 63 is closed, a gate 64 for injecting and filling a synthetic resin material into the cavity 63 is provided. Is provided. A cut-out portion 65 is formed on the inner side of the gate portion 64 so that the elastic portion 37 projects from the opening end of the clamp portion 38. By providing the cutout portion 65, the elastic resin solution is also filled in the cutout portion 65, and the elastic resin solution is cooled and solidified, so that the elastic portion 37 is formed so as to cover the opening end of the clamp portion 38. Accordingly, the clamp portion 38 made of the thin metal plate 60 does not directly hit the leader pin 36, and the press-fitting of the leader pin 36 does not damage the magnetic tape 5 wound around the winding portion 36a.

The movable mold 62b has a C-shaped thin plate 6
1. A punching die 62c for forming the elastic portion 37 on the inner surface of
Are formed. The punching die 62c is a C-shaped thin plate 61.
The diameter of the elastic part 37 is smaller than the diameter of the elastic part 37 by the thickness.

In the molding die 62 as described above, the C-shaped thin plate 61 is inserted into the cavity 63 of the fixed die 62a with the positioning recess 41 side as an insertion end.
Are arranged in a state of being engaged with the positioning projection 40. Next, the movable mold 62b to which the punching mold 62c is attached
Is attached to the fixed mold 62 a so as to close the cavity 63, and the gate portion 64 allows the cavity 63 to be closed.
The interior is injection-filled with a synthetic resin material. And FIG.
As shown in (D), after the synthetic resin material in the cavity 63 is cooled and solidified, the movable mold 62b is
The mold is released with c remaining in the cavity 63. Thereafter, the punching die 62c is forcibly removed from the C-shaped thin plate 61, and the C-shaped thin plate 61 in which the synthetic resin material is integrally formed on the inner surface side is taken out, as shown in FIG. 11 (E). The simple clamp member 35 is formed.

It should be noted that, as shown in FIG.
The synthetic resin material is fixed also in the coupling hole 42 by forming the coupling hole 42 in the
And the integration with the

Next, another example of the clamp member used in the tape cartridge according to the present invention will be described.
The same members as those of the clamp member 35 are denoted by the same reference numerals, and the details are omitted.

As shown in FIG. 12A, the clamp member 70 is provided with an opening 39 for press-fitting the leader pin 36, and has an inner surface of the elastic portion 37 formed in a polygonal shape. With such a shape, the clamp member 70 supports the magnetic tape 5 wound around the leader pin 36 at a plurality of locations where the winding portion 36a is inscribed in the elastic portion 37. Firmly clamped. That is, as shown in FIG. 12B, since the magnetic tape 5 is supported at a plurality of positions by the elastic portion 37, the clamping force of the clamp member 70 acts intensively. Therefore, the recording and / or reproducing device 44
Even if the magnetic tape 5 is pulled by the tape pull-out mechanism, the elastic portion 37 having rubber elasticity at room temperature is displaced, and a static friction force acts on the magnetic tape 5 to prevent the magnetic tape 5 from coming off the tape pull-out member 9. Is done.

Still another example of the clamp member used in the tape cartridge according to the present invention is as follows. This clamp member 72 is provided as shown in FIG.
As shown in (A), the elastic portion 37 formed in a substantially C-shape.
Is formed in an uneven shape. Thus, since the magnetic tape 5 is always supported at a plurality of points inside the elastic portion 37, the clamping force of the clamp member 72 of the magnetic tape 5 is enhanced, and the magnetic tape 5 is prevented from coming off. That is, as shown in FIG. 13B, since the magnetic tape 5 is supported by the uneven inner surface formed on the elastic portion 37, the clamping force increases. Therefore, records and / or
Alternatively, the magnetic tape 5 is driven by the tape pull-out mechanism of the reproducing device
Even if is pulled, the elastic portion 37 is displaced and a static friction force acts, so that the magnetic tape 5 is prevented from coming off the tape pull-out member 9.

Still another example of the clamp member used in the tape cartridge according to the present invention is as follows. This clamp member 74 is provided as shown in FIG.
As shown in (A), a convex portion provided inside the elastic portion 37 is formed with a certain inclination. Since the convex portion is formed to be inclined in the direction opposite to the arrow X direction in FIG.
According to the embodiment, the clamping force of the magnetic tape 5 is enhanced without wrinkling or loosening of the magnetic tape 5, and the magnetic tape 5 can be prevented from coming off. That is, as shown in FIG. 14B, the unevenness formed on the elastic portion 37 is inverted in a direction opposite to the direction in which the magnetic tape 5 comes off. Therefore, records and / or
Alternatively, the magnetic tape 5 is driven by the tape pull-out mechanism of the reproducing device 44.
When the magnetic tape 5 is pulled, the magnetic tape 5 does not easily buckle, and the elastic part 37 is displaced and a static friction force acts, so that the clamping member 74 maintains the clamping force, and the magnetic tape 5 is 9 is prevented.

In each of the clamp members 70, 72, and 74, the elastic portion 37 and the clamp portion 38 are integrally formed, so that the dimensional change between the clamp portion 38 and the elastic portion 37 is changed even after long-term use. Since no gap is generated between the clamp portion 38 and the elastic portion 37, the clamping force is weakened and the magnetic tape 5 does not come off. The clamp member 35 includes a clamp portion 38 and an elastic portion 37.
Since the tape pull-out member 9 is assembled, it can be assembled only by the step of press-fitting the leader pin 36 into the clamp member 35, and the conventional step of press-fitting the elastic member and the clamp member is omitted. Production efficiency can be improved.

Next, the tape cartridge 1 according to the present invention
Another manufacturing method of the clamp member 35 used for the following will be described.

As shown in FIG. 15, the clamp member 35 is formed by injection-molding the elastic portion 37 and then integrally injection-molding an elastic resin layer having a clamping force by using the elastic portion 37 as an insert.

First, the elastic resin solution forming the elastic portion 37 is injected and filled into the elastic portion forming die 82,
A substantially C-shaped elastic portion 37 is injection molded. At this time, when the clamp member 35 is injection-molded by the clamp portion molding die 83, the elastic portion 37 is formed with an engagement recess 87 that engages with the clamp portion 38. The engagement concave portion 87 is for increasing the coupling force between the elastic portion 37 and the clamp portion 38, and is formed integrally with the clamp portion 38 by filling the elastic concave portion 87 with an elastic resin solution. Misalignment is prevented.

As shown in FIG. 15A, an elastic part forming die 82 for injection-molding the elastic part 37 closes the fixed die 82a into which the elastic resin solution is injected and filled, and the fixed die 82a. And a movable mold 82b. By forming such an elastic portion forming die 82, a cavity 84 into which an elastic resin solution is injected and filled is formed. The cavity 84 formed in the fixed mold 82a has an opening on the side where the elastic resin solution is injected and filled, and an inner surface on the bottom side opposite to the cavity 84 is formed on the inner surface of the clamp part 38 which is injection-molded by the clamp part molding die 83. It has approximately the same curvature as the side. Also,
At the bottom of the cavity 84 is formed an engagement projection 89 in which the engagement recess 87 is formed. Further, a punching die 82c for injection-molding the elastic portion 37 is formed in the fixed die 82a. The punching die 82c is formed to have a smaller diameter than the approximately C-shaped cavity 84 by the thickness of the elastic portion 37. In such an elastic portion molding die 82, when the punching die 82c is provided in the cavity 84 and the fixed die 82a is closed by the movable die 82b, the elastic resin solution is injected and filled. After the elastic resin solution in the cavity 84 is cooled and solidified, the movable mold 82b
As shown in FIG. 15B, the mold is released while the punching die 82c remains in the cavity 84. Thereafter, the elastic part 37 including the punching die 82c is clamped to the clamping part forming die 8.
3, and the clamp member 35 is formed by injection molding.

This clamp portion forming die 83 is provided in
As shown in (C), a fixed mold 83a into which the elastic resin solution is injected and filled, and a movable mold 8 for closing the fixed mold 83a.
3b. By forming such a clamp portion forming die 83, a cavity 88 filled with an elastic resin solution is formed. The cavity 88 formed in the fixed mold 83a is open at the side where the elastic resin solution is injected and filled, and the inner surface on the bottom side facing the cavity 88 has the elastic portion 37.
The diameter corresponding to the thickness of the clamp portion 38 is formed larger. In such a clamp portion forming die 83, the elastic portion 37 including the punching die 82c is disposed in the cavity 88, and after the fixed die 83a is closed by the movable die 83b, the elastic resin solution is filled. Injection filling. Then, after the elastic resin solution is cooled and solidified in the cavity 88, the movable mold 83b is released with the elastic portion 37 remaining in the cavity 88. Thereafter, the punching die 82c is connected to the elastic portion 3
1 by taking out a substantially C-shaped elastic member which is forcibly removed from the inner surface and has an elastic resin material integrally formed on the inner surface side.
The clamp member 35 as shown in FIG. 5 (D) is formed.
The elastic portion 37 is formed by injecting the elastic resin solution into the clamp portion forming die 83 by using an elastic resin solution forming the clamp portion having a melting point lower than that of the elastic resin solution forming the elastic portion 37. Melting during filling is prevented. Further, the engagement recess 87 may be formed so as to protrude toward the clamp portion 38. By providing a plurality of the engagement recesses 87, the coupling force between the elastic portion 37 and the clamp portion 38 can be strengthened, and after the integral molding, Deviation can be prevented.

Further, the clamp member 35 according to the present invention
It can also be formed as follows. This clamp member 3
First, as shown in FIG.
8 is cut into a predetermined size. At this time, the metal thin plate 91 may be formed with an engaging projection or a concave portion for increasing the coupling force with the elastic resin material 92. Next, as shown in FIG. 16B, an elastic resin material 92 constituting the elastic portion 37 is provided on one side of the thin metal plate 91.
Are bonded to form a plate-shaped clamp 94 in which the thin metal plate 91 and the elastic resin material are integrally formed. The elastic resin material 92 is made of an elastic member such as an elastomer having an elastic force at room temperature, and is bonded by an adhesive. Further, the plate-like clamp 94 can be formed by integrally forming the elastic resin material 92 by pressing the elastic resin material 92 to the metal thin plate 91. That is, by arranging the elastic resin material 92 on the thin metal plate 91 and then pressing it with a press machine or the like,
An elastic resin material 92 and a thin metal plate 91 are integrally formed to form a plate-shaped clamp 94. Further, the plate-like clamp 94 may be formed by applying the elastic resin solution 93 on the metal thin plate 91 and cooling and solidifying the elastic resin solution 93. That is, at room temperature, an elastic resin solution 93 constituting the elastic resin material 92 is applied on the thin metal plate 91, and the elastic resin solution 93 is cooled and solidified to form the thin metal plate 9.
1 and an elastic resin material 92 are integrally formed in a plate-shaped clamp 94.
Is formed.

Next, as shown in FIG. 16C, the clamp member 35 is formed by bending the plate-like clamp 94 in a substantially C-shape. Note that as shown in FIG. 16D, by providing the connecting hole 95 in the thin metal plate 91, the connecting force between the elastic portion 37 and the clamp portion 38 can be increased.

Further, the clamp member 35 according to the present invention
It can also be formed as follows. This clamp member 3
5 is, as shown in FIG. 17A, a C-shaped clamp 103 formed by bending a thin metal plate 101 or an elastic resin material 102 constituting the clamp portion 38 into a substantially C shape. At this time, the C-shaped clamp 103 may be formed with an engaging projection or a concave portion for increasing the coupling force with the elastic portion 37.

Next, as shown in FIG. 17B, the C-type clamp 103 is immersed in a container filled with the elastic resin solution 104 constituting the elastic portion 37, and the elastic resin solution 104 is placed in the C-type clamp 103. Is applied. Thereafter, as shown in FIG. 17C, the elastic resin solution 104 is cooled and solidified, whereby the clamp member 35 in which the elastic portion 37 covers the clamp portion 38 is formed. Note that FIG.
As shown in (1), by providing one or a plurality of coupling holes 105 in the C-shaped clamp 103, the elastic resin solution 104 solidifies even in the coupling holes 105, so that the coupling force between the elastic portion 37 and the clamp portion 38 can be increased. it can.

[0052]

According to the tape cartridge of the present invention, the clamp member in which the leader pin around which the magnetic tape is wound is fitted with the elastic portion for fixing the tape and the clamp portion are integrally formed. Since the dimensional change between the clamp portion and the elastic portion does not occur, and a gap is formed between the clamp portion and the elastic portion, the magnetic tape can be prevented from coming off without deterioration of the clamping force of the clamp member. Further, since the clamp member is integrally formed, the process of fitting the clamp member to the leader pin around which the magnetic tape is wound in the step of forming the tape pull-out member at the tip of the magnetic tape is simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tape cartridge according to the present invention as viewed from above.

FIG. 2 is a perspective view of the tape cartridge according to the present invention as viewed from below.

FIG. 3 is an exploded perspective view of the tape cartridge according to the present invention.

FIG. 4 is a top view showing the tape cartridge according to the present invention.

FIG. 5 is a sectional view showing a tape cartridge according to the present invention.

FIG. 6 is an external perspective view showing the structure of a tape pull-out member according to the present invention.

FIG. 7 is a top view showing a clamp member provided with a coupling hole in the clamp portion.

FIG. 8 is a perspective view showing a tape pull-out opening in which a clamp member according to the present invention is locked.

FIG. 9 is a sectional view showing a tape pull-out opening in which a clamp member according to the present invention is locked.

FIG. 10 is a cross-sectional view showing the tape cartridge mounted on the drive device.

FIG. 11 is a process diagram showing a manufacturing process of the clamp member according to the present invention.

FIG. 12 is a cross-sectional view showing a clamp member and a tape pull-out member in which the inside of an elastic portion is formed in a polygonal shape.

FIG. 13 is a cross-sectional view showing a clamp member and a tape pull-out member formed by providing irregularities inside an elastic member.

FIG. 14 is a cross-sectional view showing a clamp member and a tape pull-out member which are provided with irregularities on the inner side of an elastic member and which are formed asymmetrically with respect to the direction in which the magnetic tape comes off.

FIG. 15 is a process diagram of a clamp member in which a clamp portion is formed by an elastic member using an injection molding method.

FIG. 16 is a process diagram of a clamp member in which an elastic resin material is adhered to a metal plate and the magnetic tape is curved so that a magnetic tape can be clamped.

FIG. 17 is a process diagram of forming a clamp member by immersing a C-shaped clamp curved so that a magnetic tape can be clamped in an elastic resin solution.

FIG. 18 is an exploded perspective view showing a configuration of a clamp member according to a conventional technique.

FIG. 19 is a cross-sectional view showing a tape pull-out member according to the related art.

[Explanation of symbols]

1 tape cartridge, 2 cartridge body, 5
Magnetic tape, 6 tape reels, 9 tape pull-out members,
35 clamp member, 36 leader pin, 37 elastic part, 38 clamp part, 39 opening, 41 positioning concave part, 42 coupling hole

Claims (10)

[Claims] 1. A tape-shaped recording medium having one end to which a tape pull-out member to which a tape pull-out mechanism of a recording and / or reproducing apparatus is engaged is attached; and the other end of the tape-shaped recording medium is attached; A tape reel on which a recording medium is wound, and a cartridge body in which the tape reel is rotatably housed, and a tape withdrawal opening for exposing the tape withdrawal member to one side is formed on one side; The tape pull-out member is formed integrally with the clamp pin on the inner surface of the leader pin on which one end of the tape-shaped recording medium is wound, the clamp section for clamping the tape-shaped recording medium on the leader pin, and the clamp section. And a clamp member comprising an elastic portion. 2. The tape cartridge according to claim 1, wherein a convex portion or a concave portion is formed on an inner surface side of the clamp portion to enhance a coupling force with the elastic portion. 3. The tape cartridge according to claim 1, wherein a connection hole is formed in the clamp portion to enhance a bonding force with the elastic portion. 4. A concave portion or a convex portion for positioning with respect to the molding die when the clamp portion is disposed on a molding die, is formed on an outer surface side of the clamp portion. The tape cartridge according to claim 1, wherein 5. An inner surface of the elastic portion, which is pressed against the tape-shaped recording medium wound around the leader pin, is formed in a substantially polygonal shape. Tape cartridge. 6. The tape according to claim 1, wherein irregularities are continuously formed on an inner surface of the elastic portion which is pressed against the tape-shaped recording medium wound around the leader pin. cartridge. 7. A projection that is continuously formed on an inner surface of the elastic portion that is pressed against the tape-shaped recording medium wound around the leader pin and that is inclined in a direction opposite to a direction in which the tape-shaped recording medium comes off. The tape cartridge according to claim 1, wherein the tape cartridge is formed. 8. The tape cartridge according to claim 1, wherein the clamp member is formed by injecting and filling a liquid resin into a cavity in which the clamp portion is provided. 9. The apparatus according to claim 1, wherein the clamp member is formed by integrating the elastic portion and the clamp portion in a flat plate state, and then deforming the tape-shaped recording medium into a clampable shape. The tape cartridge as described. 10. The clamp member deforms a plate-like body into a shape capable of clamping a tape-shaped recording medium to form the clamp portion, and then immerses the clamp portion in a liquid resin forming the elastic portion. The tape cartridge according to claim 1, wherein the tape cartridge is formed by: