JPS5935898Y2 - tape reel - Google Patents

Description

[Detailed description of the invention] The present invention includes a cylindrical reel hub integrally provided at the upper part of the center of the lower flange, and a semi-cylindrical tape winding radially outward of the reel hub at a predetermined interval. A semi-cylindrical tape stop is engaged with a semi-cylindrical tape stop at a position facing the tape winding part on the outside of the reel hub in the radial direction, thereby locking the leader tape inside the tape stop. , relates to a tape reel in which an upper flange is attached to the upper end of the reel hub, and a magnetic tape connected to the leader tape is wound around the outer circumference of a cylindrical part formed by the tape winding part and the tape fastening, especially,
To provide a new tape reel which prevents the disadvantages associated with thinning of tapes stored in cassettes.

FIG. 1 shows a conventional tape reel used in a videotape cassette, and the width k between the upper and lower flanges 1 and 2 of this tape reel is approximately equal to or slightly larger than the tape width.

This tape reel includes a reel body 12 which has a reel shaft insertion hole 4 at the lower R and is integrally provided with a tape winding part 6, a lower flange 2, a notch part 8, and a crimping part 10, and these parts. 8 and an upper flange 1 provided with openings 14 and 15 corresponding to the crimped part 10, respectively, and these are integrally combined by welding the crimped part 10.

Leader tape 16 connected to the end of the Mako magnetic tape
One end of the trailer tape (or trailer tape) is clamped by a semi-cylindrical tape stopper 17 made of synthetic resin or the like.

, and the outer peripheral surface 17a of this tape stop 17 constitutes a part of a cylindrical surface, and when the tape stop 17 is clamped to the reel body 8, one cylindrical surface is formed by the tape winding part 6 and the outer peripheral surface 17a. A leader tape 16 and a magnetic tape (not shown) are wound around this cylindrical surface.

Incidentally, there is a strong demand for recent video tape recorders, tape recorders, etc. to be capable of recording and reproducing over a long period of time.

Therefore, in addition to improving the device itself, the tape cassette itself must also be adapted to accommodate longer recording and playback times.

However, since the size of a tape cassette is limited to a certain extent and cannot be increased unnecessarily, the current situation is to increase the operating time by reducing the thickness of the magnetic tape stored in the tape cassette.

When winding such a thin magnetic tape onto a conventional tape reel as described above, the upper and lower edges of the magnetic tape come into contact with the upper and lower flanges 1 and 2, making the tape running state unstable. The winding condition tends to deteriorate, and there is a risk that the edge portions of the magnetic tape may be bent, or the edge portions may be overlapped when wound, resulting in undesirable phenomena.

Therefore, it is possible to widen the distance between the upper and lower flanges 1 and 2 in order to prevent the edges from bending, etc.
Figure 1 (With a tape reel of the conventional structure shown in this figure, it is difficult to accurately lock the leader tape 16 at the center of the tape winding surface 6, and the leader tape 16 is placed 1° between the upper and lower flanges of the tape reel. If it deviates vertically from the center (center part of the inlay), the above-mentioned defect will occur.

The present invention was devised in view of the above-mentioned circumstances, and in the above-mentioned tape reel, a pair of upper and lower flanges are provided inside the upper and lower flanges at a position l along the outer periphery of the reel hub inside the tape stop. A regulating section is integrally provided, and these regulating sections are configured to regulate the leader tape at a central position between the upper and lower flanges, and the leader tape is radially outward from the cylindrical section around which the magnetic tape is wound. In this case, the present invention relates to a tape reel in which the interval between the upper and lower flanges is wider than the tape width.

With this configuration, the leader tape can be accurately locked at approximately the center position between the upper and lower flanges, and gaps are formed between the tape edge and the upper and lower flanges, so that the tape edge It is possible to reliably prevent the upper and lower flanges from contacting each other and bending.

Therefore, the thinning of the tape can be sufficiently coped with.

Next, an embodiment in which the present invention is applied to a tape reel of a video tape cassette will be described with reference to FIGS. 2 to 4.

Note that parts common to those in FIG. 1 are given the same reference numerals and their explanations will be omitted.

In this embodiment, as shown in FIG. 2 and FIG. A regulating portion 21 consisting of a stepped portion is integrally molded.

Further, a regulating portion 22 corresponding to and having the same shape as the regulating portion 21 is integrally formed on the lower surface of the upper flange 1.

A tape winding part 6 having a Σ semi-cylindrical shape is provided on the outer side of these regulating parts 21 and 22 at a predetermined distance from the reel hub 19.

In addition, at both ends of this tape winding part 6, there are recesses 2 for bonding.
3a, 23b and inclined surfaces 20a, 20b are provided, respectively.

Note that the width B between these regulating portions 21 and 22 (see Figure 4)
is approximately equal to the tape width, so the upper and lower flanges 1 when the upper flange 1 is combined with the reel body 12
, 2 is configured to be larger than the width in FIG.

Further, the tape stopper 24 is made of an elastic member made of synthetic resin or the like, and is formed into a substantially semi-cylindrical shape as shown in FIGS. 2 and 3.

At both ends of this tape stop 24, there are engaging pieces 15a,
26b are provided integrally with each other, and these engaging pieces 7
6a.

26b has a protrusion 30 having slopes Dfi28a, 28b.
a t 30 b are provided, respectively.

Further, the upper and lower ends of the engaging pieces 26a and 26b receive the regulating portions 21 and 22 provided at the lower end of the reel hub 19 and the lower i1 of the upper flange 1, respectively, as shown in FIGS. 2 and 4. The holder is sandwiched between the tape fixing 24 by an amount corresponding to the thickness of the regulating portions 21 and 22 here.

Next, the procedure for securing one end of the leader tape 16 to the tape winding section 6 using the tape fixing 24 will be described.First, as shown in FIG. The leader tape 16 is placed and positioned.

After that, the tape stopper 24 is moved in the direction indicated by the arrow in FIG.
bring it into contact with.

Then, by further pressing the tape stopper 24 in the direction of the arrow, the inclined surfaces 28a and 28b are changed to the inclined surfaces 20a and 20a.
0b, the tape fixing 24 is attached to the engaging piece 26a,
26b are elastically deformed in a direction toward each other.

When this pressing is continued, the engagement pieces 26a,
The protrusions 30a, 30b of 26b reach the recesses 23a*23b provided in the inner peripheral part of the tape winding section 6, and at this time, the tape stopper 24 elastically returns to the position of the protrusions 30a, 30.
b are engaged with the recesses 23a and 23b, respectively.

Along with this, between the tape winding part 6 and the tape stop 24 (the intervening leader tape 16 is connected to the protrusion 30a of the engaging piece 26a and the tape winding part 6 as shown in FIG. The clamp portion 31t is held between the recess 23a and the clamp portion 31t.

Next, the bottom flange 2 and the crimped part 10 are inserted into the opening 14.15 of the flange 1, and the crimped part 1
The upper and lower flanges 1 and 2 are integrated by welding the
Combine this.

It should be noted that the leader tape 16 on the tape reel f combined in this way is connected to the regulating portion 2 as shown in FIG.
1.22G, it is therefore restricted to approximately the center position between the upper and lower flanges 1 and 2.

According to the tape reel configured as described above, the regulating portion 2
1.22 attach the leader tape 16 to the upper and lower flanges 1
, 2 can be precisely regulated to approximately the center position between the two.

Therefore, the position of the magnetic tape connected to this leader tape 16 is also regulated by this leader tape 16, and a cylinder formed by the tape winding section 6 and the tape fixing 24 is formed approximately in the center between the upper and lower flanges 1 and 2. It will be wound around the outer circumference of the part.

Moreover, by making the width between the upper and lower flanges 1.2 wider than the tape width, when winding up the leader tape 16 and the magnetic tape connected thereto, the upper and lower ends of these tapes and the upper and lower flanges 1, 2 A predetermined gap 32.33 between
are formed respectively, so even if there is some winding disorder, the upper and lower ends of these tapes will be aligned with the upper and lower flanges 1 and 2.
There will be no contact with.

Therefore, there is no risk of tape running being unstable or the edges of the magnetic tape being bent.
Even thin magnetic tapes can be run stably.

Although the present invention has been described above with reference to one embodiment, the present invention is not limited to this embodiment, and various modifications can be made based on the technical idea of the present invention.

As described above, in the present invention, a pair of upper and lower regulating parts are integrally provided inside the upper and lower flanges at a position l along the outer circumference of the reel hub inside the tape stop, and these regulating parts allow the leader tape to be stretched between the upper and lower flanges. The magnetic tape is configured so as to be restricted to the center position, and the spacing between the upper and lower flanges is wider than the tape width at positions radially outward from the cylindrical portion around which the magnetic tape is wound.

Therefore, according to the present invention, the leader tape can be accurately locked at the center position between the upper and lower flanges inside the tape stop.

The position of the magnetic tape connected to this leader tape is also regulated by this leader tape, so that it is precisely wound around the outer periphery of the cylindrical part formed by the tape winding part and the tape fastening at the center position between the upper and lower flanges. It will be passed around.

Moreover, at the radially outer position of the cylindrical part around which the magnetic tape is wound, the gap between the upper and lower flanges is made wider than the tape width, so that a predetermined gap is formed between the upper and lower flanges and the upper and lower edges of the magnetic tape. This prevents these upper and lower edges from coming into contact with the upper and lower flanges even if the winding of the magnetic tape is unexpectedly disturbed.

Therefore, it is possible to reliably prevent tape running disturbances and tape edge bending caused by contact between the upper and lower flanges and the upper and lower edges of the magnetic tape, and even thin magnetic tapes can be wound with good stability. .

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view of a conventional tape reel for a videotape cassette, and FIGS. 2 to 4 show an embodiment of the present invention applied to a tape reel for a videotape cassette. 2 is an exploded perspective view of the tape reel, FIG. 3 is a plan view of the tape reel with the upper flange removed, and FIG. 4 is a large sectional view taken along line IV--IV in FIG. 3. In addition, in the symbols used in the drawings, 1°°. ...Top flange, 2...Bottom flange, 16.
...Leader tape, 21, 22...Regulation section, 24...Tape fastening, 31°°°・°・
Tape clamp section, 6... Tape winding section, 19
・・・・・・Reel hub.

Claims (1)

[Scope of utility model registration request] E
By engaging a semi-cylindrical tape stop at a position facing the tape winding section on the outside of the radial direction of the hub, the leader tape is locked inside the tape stop, and the leader tape is secured to the inside of the tape stop. In a tape reel with an upper flange attached to the upper end and a magnetic tape connected to the leader tape wound around the outer periphery of a cylindrical part formed by the tape winding part and the tape fastener, the inner side of the tape fastener A pair of upper and lower regulating portions are integrally provided inside the upper and lower flanges at positions along the outer periphery of the reel hub, and these regulating portions regulate the leader tape to a central position between the upper and lower flanges. 2. A tape reel characterized in that the distance between the upper and lower flanges is wider than the tape width at a position radially outward from the cylindrical portion around which the magnetic tape is wound.