JPH0329176A - Single tape reel - Google Patents

Abstract

PURPOSE:To reduce the using frequency of a projected part acting as a reel top by forming the projected part acting as the reel top on one face of an operation knob of a tape stopper. CONSTITUTION:The projected part 13 acting as the reel top so as to be abutted upon a reel pressing part 26 when the operation knob is laid down at the time of fixing the tape stopper 5 to a reel hub 15 of a take-up reel 14 is formed on one face of the operation knob of the tape stopper 5. When an adaptor is loaded into a VTR, the projected part 13 is abutted upon the reel pressing part 26 and the winding reel 14 is pressed. In each time of replacing the single tape reel by another one, the projected part formed on the operation knob of another tape stopper is abutted upon the reel pressing part 26. Thereby, the using frequency of the projected part 13 acting as the reel top in each single tape reel can be extremely reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a single table reel wound with magnetic tape (hereinafter also simply referred to as tape), which is a recording medium for a VTR (video tape recorder) or the like.

[Conventional technology] Tape cassettes commonly used in consumer VTRs have a supply reel and a take-up reel inside, so storing such tape cassettes requires a large storage space, and It was also difficult to carry. Therefore, JP-A-62-184677 discloses a system in which only a single table reel wrapped with magnetic tape is stored in a reel case, and this reel case is attached to an adapter having approximately the same shape as a standard tape cassette. It is shown.

However, according to this, the tape wound on the table reel is easily fed out of the reel case, which may damage the feeding part, and furthermore, it is difficult to form a predetermined tape path when the adapter is attached. Workability was poor because the tape had to be routed by grasping a minute locking pin.

Therefore, prior to the present invention, the present applicant had developed a cassette with approximately the same external shape as a standard cassette, as shown in FIG. 15 as a side view in an open state and FIG. 16 as a perspective view in a closed state. We have already proposed an upper and lower half opening/closing type cassette adapter that can be equipped with a single tape reel 40 as a supply reel, a perspective view of which is shown in FIG.

This single data reel 40 includes a reel hub 4l around which the magnetic tape 4 is wound, an upper 7 flange 42 and a lower flange 43 provided at the upper and lower ends of the reel hub 41, respectively.
and a tape stopper 50 fixed to the peripheral edge of the upper flange 42 so as to press the tip of the wound magnetic tape 4.

In this case, an engagement groove 44 is formed on the outer surface of the peripheral edge of the upper flange 42 to which the tape stopper 50 is fixed, and notches 45 cut inward in the radial direction are formed at predetermined intervals. It is shaped all the way around.

On the other hand, tape stopper (hereinafter also simply referred to as stopper)
50 has a substantially semicircular cross section, and a locking portion 52 connected by a neck-shaped portion 5l is formed by cutting the ends in the elongated direction from both sides. Therefore, when the neck portion 51 of the stopper 50 is inserted into the notch portion 45 of the upper flange 42,
The engagement force between the two and the convex portion 5 formed on the lower surface of the locking portion 52
3 falls into the engagement groove 44 and is fixed to the peripheral edge of the upper flange 42, thereby preventing the tape from being fed out. Poor workability is eliminated.

This stopper was previously proposed by the applicant in a patent application filed in 1986-3.
Attach a single tape reel to the cassette adapter proposed in No. 01391, pull out the leader tape fixed to the stopper, form a predetermined tape path in the cassette, and then fix the leader tape to the take-up reel. It is also used to That is, as shown in FIGS. 19 and 20, it is also used when attaching the tape 4 to the reel hub 62 of the take-up reel 6L housed in the adapter 30. is also contributing.

When using a single table reel, it is attached to the previously proposed cassette adapter, but this adapter houses a take-up reel, and this one take-up reel is always used repeatedly each time the adapter is used. . One end of the reel hub of this take-up reel, that is, the side facing the inner surface of the upper half of the casing, is formed with a convex portion that operates as a reel top, and comes into contact with a reel presser provided on the inner surface of the upper half. ing.

[Problems to be Solved by the Invention] Every time the previously proposed single tape reel described above is used, the take-up reel inside the single table reel adapter is rotated, so it is difficult to use the reel top provided on the reel hub. The frequency is extremely high compared to the reel top of a single table reel, in which different ones are used one after another, and therefore there is a problem that there is wear and deterioration due to long-term use, and it is easy to break. Although it is possible to set the hardness of the reel top of the supply reel to be high to make it less likely to wear, this would lead to increased costs and was not practical.

Therefore, the present invention eliminates problems such as wear and deterioration of the reel top of the take-up reel provided in the single tape reel adapter due to long-term use, and the structure of the take-up reel is simple and inexpensive. The purpose of this invention is to provide a single table reel having a structure that can solve such problems.

[Means for Solving the Problems] In order to overcome the above object, the single-tab reel according to the present invention does not provide a convex portion on the take-up reel that acts as a reel top of the take-up reel, but has a convex portion that acts as a reel top of the take-up reel. It is provided on the knob portion which is a rotatable operation knob of the tape stopper of a single table reel.

That is, according to the present invention, there is provided a reel hub on which a magnetic tape is wound, upper and lower flanges respectively provided at the bottom end of the reel hub, and a peripheral edge of the flange so as to press down the end of the magnetic tape wound on the reel hub. A tape stonopter to which the tape is fixed, a casing having approximately the same external shape as a standard tape cassette and consisting of upper and lower halves, a take-up reel, and a reel holding part that presses the take-up reel and is attached to the inner surface of the upper half. A base part that can be detachably attached to a tape reel adapter, and the tape stopper is located between the upper and lower flanges when attached, and an operation knob that is pivotally supported on the upper end of this base so that it can rotate by a predetermined angle. and a single table reel, wherein the tape stopper is inserted into a cut arrow part provided on a reel hub of the take-up reel in the adapter to form a part of the reel hub. On one surface of the operation knob of the stopper, there is a convex portion that can come into contact with the reel presser and act as a reel knob when the tape striker is attached to the reel knob of the take-up reel and the operation knob is placed sideways. A single table reel is provided characterized in that it is provided with a.

[Function] In the present invention, since a convex portion that can act as a reel top is provided on one side of the operation knob of the tape stopper of a single tape reel, the single table reel is attached to the single tape reel adapter, and the tape stopper is attached to the single tape reel. After removing the tape from a single tape reel and forming a predetermined tape path inside the casing that constitutes the adapter, it is fixed to the reel hub of the take-up reel and the rotatable operating knob is laid down on its side. The provided convex portion is positioned so as to face the reel press provided on the inner surface of the upper half of the casing. Therefore, when the adapter is installed in the VTR, the convex portion comes into contact with the reel holding portion, and the take-up reel is held down. Each time a single table reel is replaced with another one, the convex part provided on the operation/button of another tape stopper will come into contact with the reel presser, so each single tape reel will not work as a reel top. The frequency of use of the working convex portion becomes extremely low.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 14.

FIG. 1 is a partially enlarged perspective view of a take-up (hereinafter also referred to as TU) reel housed in the single table reel adapter of the present invention, and shows the table tape and pad 5 removed from the single tape reel, which will be described later. This figure shows the state before being installed in the notch 16 provided in the reel hub l5 of the take-up reel l4. FIG. 2 is a perspective view of the tape stopper being installed, and FIG. 3 is a perspective view of the tape stopper being installed.

This stopper 5 fixes the leader tape tip of a removable supply reel (described later), that is, a single tape reel, to one flange of the single table reel. In use, after attaching the single tape reel to a predetermined position inside the single table reel adapter, remove the tape stopper 5 and tighten the tape stopper 5 so that the leader tape is stretched along the guide ball inside the single table reel adapter. Finally, the tape stopper 5 is attached to the notch 16 of the reel hub l5 of the take-up reel 14, forming part of the outer periphery of the reel hub 15.

Next, in FIGS. 7(a) and 7(b), the single tape reel 1 is arranged so that the tape 4 is wound between the upper flange 2a and the lower flange 2b provided at the axial end of the reel hub, respectively. It has become. A tape stopper 5 is provided to press the tip of the wound tape 4, that is, the tip of the transparent leader tape.

Here, an annular groove 3 is formed on the peripheral edge of the upper surface of the upper flange 2a. On the other hand, the stopper 5 has a base portion 5a having a substantially semicircular cross section. Step-like engaging portions sb and 5c are provided at both end portions of this base portion to be inserted into the notch 16 of the take-up reel 15 and engaged with the locking means thereof. A U-shaped engaging portion 6 is formed at the upper part of the inner surface of the base portion 5a to fit with the peripheral edge of the upper flange 2a of the single table reel l. The center of the upper end of the base 5a is cut out, and a knob 7 serving as an operation knob is rotatably supported by a rotating shaft 8 so that it can be tilted horizontally from an upwardly erect state. There is.

Further, a pin 9 is installed in the groove at a position slightly shifted from the rotation axis of the knob 70 toward the free end, and a clamp lO is installed in the groove at a lower position of the base 5a, and a tensile force is applied between them. A spring 11 as an elastic member is applied. As a result, if the knob part 7 is made to stand up as shown by the two-dot chain line in FIG. When it is tilted to the left by an angle, a leftward moment is applied to give it momentum and cause it to fall sideways as shown by the solid line, while maintaining the sideways state shown by the solid line in FIG. 7(b). That is, when the spring 11 moves the knob 7 from an upright state to a sideways state or vice versa, a snub operation is performed.

Furthermore, a locking convex portion l2 is formed on the surface facing the upper flange 2a of the knob portion 7, which engages with the annular groove 3 when the grip portion 7 is turned sideways.

As shown in FIG. 7(a), when the knob part 7 is turned sideways and the locking part convex part 12 is engaged with the annular groove 3, the U-shaped engaging part 6 and The locking protrusion 12 supports the peripheral edge of the upper flange 2a, and prevents the stonopter 5 from shifting to the right in FIGS. 7(a) and 7(b) from the upper flange 2a.

In addition, a convex portion l3 that operates to close the reel top is formed in the center of the knob portion 7, and comes into contact with the reel presser portion of the TU reel, which will be described later, when using the single table reel adapter. .

Here, the operation of attaching and detaching the stopper 5 to the upper flange 2a will be briefly explained.

First, as shown in FIGS. 7(a), (b) and 3,
Assuming that the stopper 5 is attached to the upper flange 2a, when the knob 7 that is lying on its side is pulled up in the direction of arrow A in FIG. A force must be applied to resist the tensile force of l1, but if this angle is exceeded, the spring ll will generate a moment in the opposite direction, resulting in a snapping action and the knob 7 will double as shown in Figure 7(b). It is held in the upright position shown by the dotted chain line. Furthermore, by raising the knob 7, the locking protrusion 12 comes off from the annular groove 3. In this state, hold the knob 7 and hold it as shown in Fig. 7 (
a) By moving it to the right in (b), the stopper 5 can be removed from the upper flange 2a.

Next, when installing, as shown in FIGS. 7(a) and 7(b), after engaging the U-shaped engaging portion 6 with the periphery of the upper flange 2a, the knob portion 7 is moved in the direction of the arrow B. When folded down, the locking protrusion l2
engages with the annular groove 3 and supports the peripheral edge of the upper flange 2a together with the U-shaped engaging portion 6, thereby firmly fixing it to the upper flange 2a.

Note that the stopper 5 can be freely attached anywhere around the entire circumference of the upper flange 2a, and the attachment position is not restricted by the cut arrow part as in the conventional case.

Next, the case of attaching and detaching the striker 5 to and from the reel hub 15 of the take-up reel 14 on the adapter side will be described with reference to FIGS. 1 to 6 and FIGS. 8 to 13. In each of these figures, the curvature of the outer peripheral surface of the base 5a is set to be the same as the curvature of the outer peripheral surface of the reel hub l5 so that the base 5a of the stopper 5 constitutes a part of the reel hub l5 of the TU reel l4. Correspondingly, a portion thereof is cut out to form a notch l6 which acts as a mounting portion.

In addition, the upper flange l7 is notched in an appropriate range corresponding to the notch l6 as shown in FIG. 1, and furthermore,
A gap G is formed as shown in FIG. 8(b) so that the U-shaped engaging portion 6 of the stopper 5 fits into the edge thereof, and a single table reel l is provided on the upper surface of the upper flange l7. A groove l8 corresponding to the annular groove 3 is formed.

The upper flange 17 also includes a recess l9 located above the reel hub l5 and housing the knob 7 when the stopper 5 is attached.
, and a protrusion 20 that protrudes in the radial direction is formed within this recess l9.

Furthermore, as shown in FIGS. 8 to 11, the reel hub l5 has a locking portion having a step for engaging with the engaging portion 5b of the stopper 5 at the opposite end of the notch l6 in the winding direction. 2l, and a hook portion 2 for engaging with the engaging portion 5C of the stopper 5 at the winding side end on the opposite side.
3 is provided in the groove, and this slide member 22 is urged counterclockwise in the figure by a spring 24, and is normally held in a state in which the hook portion 23 protrudes into the notch 16. Moreover, it is movable in the circumferential direction and can appear and retract freely.

FIG. 12 shows the TU side end of the holding plate 25 provided on the upper half side of the adapter and for pressing the reel. A TU side reel holding part 26 is provided at the same end, and the stopper 5 is attached to the holding plate 25. At times, it comes into contact with a convex portion l3 which is the reel top of the knob portion 7. Also, this TU side reel holding part 2
6, for example, as shown in FIG.
A rotation prevention part 27 is provided to prevent rotation of the reel 14.

Here, reel hub l5 of TU reel l4 of stopper 5
This section explains how to attach and detach it. Grasp the knob part 7 by the tip,
As shown in FIGS. 2 and 8, the engaging portion 5b of the striker 5
is engaged with the locking portion 2l at one end of the notch l6, that is, the end on the side opposite to the winding direction, and then the stopper 5 is brought to the notch 16, as shown by arrow C in FIG. When the slide member 22 is pushed in, the spring 2
The slide member 22 slides clockwise in the figure, that is, in the winding direction, but at the same time as the stopper 5 fits into the notch l6, the slide member 22 is pressed against the urging force of the spring 24.
It is returned to its original state by the urging force of , and the hook portion 23 is caught on the engaging portion 5c of the stopper 5. As a result, the stopper 5 is locked in a predetermined position of the notch 16, and the stopper 5 forms a part of the reel hub l5. In this state, the U-shaped engaging portion 6 of the stopper 5 is fitted into the upper flange 17, as shown in FIG. 8(b). and,
When the knob 7 in the upright state is turned sideways in the direction of the arrow B, the knob 7 is housed in the recess l9 and the locking protrusion l2 engages with the groove l8, unlike the case of the above-mentioned supply reel. Similarly, it is firmly fixed to the upper flange l7 of the TU reel 14. Moreover, its left and right ends are respectively locked by the locking part 2l and the hook part 23 of the slide member 22,
The stopper 5 will never come off from the notch 16.

This condition is shown in FIGS. 4 and 9. As a result, even if the tape 4 is pulled as shown in FIG. 9 when attached to a VTR device and in the rewind (REW) mode,
The anti-winding side end of the stopper 5 only applies a tensile force to the locking portion 21, but the stopper 5 does not come off the TU reel l4, thereby reliably preventing its tip from being fed out into the VTR. can do.

At this time, as shown in FIG. 13, the TU reel 14 has a convex portion l3 which becomes the reel top of the knob portion 7 of the stopper 5, and a TU side reel presser portion 26 of the presser portion 25 provided on the upper half side of the adapter. are in contact with each other, and an appropriate pressing force is applied by the elastic force of the presser plate 25.

On the other hand, from the installed state shown in FIGS. 4 and 9, the stopper 5
To remove it, the operation is completely reverse to that described above, and as shown in Fig. 5, raise the knob 7 and resist the biasing force of the spring 24 in the direction of arrow D in Fig. 5 and Fig. Move the stopper 5 so as to press the slide member 22 to release the engaging part 5b from the locking part 2l, and then rotate the stopper 5 in the direction of arrow E in FIGS. 6 and 11. Then, connect the other engaging portion 5c to the hook portion 2 of the slide member 22.
If removed from 3, it will be in a detached state.

Next, a case will be described in which, for example, the stopper 5 is incompletely attached to the notch 16 of the TU reel l4 and the stopper 5 comes off from the notch 16.

When the stopper 5 comes off from the notch 16 of the TU reel l4,
As shown in FIG. 14, the recess 19 in the upper part of the TU reel l4
The TU side reel holding part 26 of the holding plate 25 enters inside.

Then, the reel drive means on the VTR device side
- When the reel l4 is rotationally driven, the rotation preventing portion 27 of the holding plate 25 comes into contact with the protrusion 20 of the recess l9 to prevent the rotation of the TU reel l4. As a result, an excessive load is applied to the reel drive means on the VTR device side, and the reel drive is immediately stopped. Therefore, it is possible to reliably prevent the tape 4 from being fed into the VTR.

[Effects of the Invention] As is clear from the above explanation, according to the single table reel of the present invention, a convex portion that can act as a reel top is provided on one surface of the operation knob of the tape stopper of the single table reel. After attaching the tape reel to the single tape reel adapter and removing the tape stopper from the single tape reel to form a predetermined tape bus inside the casing that makes up the adapter, it is fixed to the reel hub of the take-up reel so that it can rotate freely. When the operating knob is placed sideways, the convex portion provided on one surface thereof is positioned to face the reel press provided on the inner surface of the upper half of the casing. Therefore, when the adapter is installed in the VTR, the convex portion comes into contact with the reel holding portion, and the take-up reel is held down. Every time a single table reel is replaced with another one, the protrusion provided on the operation knob of another tape stopper comes into contact with the reel presser, so the protrusion that acts as the reel top for each single table reel comes into contact with the reel presser. This has the effect that the frequency of use of the section is extremely low.

[Brief explanation of drawings]

1 to 6 are perspective views showing the vicinity of the reel hub of the take-up reel in the single table reel adapter to which the single tape reel of the present invention is applied;
The figure shows how the tape stopper is attached to the reel hub, and Figures 4 to 6 show how the tape stopper is removed from the reel hub.
) are a plan view and a side sectional view respectively showing how the tape stopper shown in FIGS. 1 to 6 is attached to a single table reel that is a supply reel, and FIGS. 8(a) and 9
Figures 11 to 11 are plan sectional views showing how the tape stopper is attached to and removed from the reel hub of the take-up reel, and Figure 8 (b).
) is a side cross-sectional view showing the situation in FIG. 8(a), FIG. 12 is a perspective view showing the reel presser attached to the upper half of the adapter, and FIGS. 13(a) and (b) are 14(a) and 14(b) show a plan view and a side cross-sectional view showing the state of contact between the reel presser and the reel top, respectively. FIGS. FIGS. 15 and 16 are a plan view and a side sectional view respectively showing how the protrusions are in contact with each other; FIGS. , FIG. 17 and FIG. 18 are perspective views showing a single table reel previously proposed by the present applicant, and FIGS. 19 and 20 are perspective views showing the previously proposed single tape reel with the stopper removed and a take-up reel. It is a perspective view showing how it is attached. ...Step part, 7...Knob part, 8...Rotating shaft, 9...Pin, lO...Clumber, l1...
Spring, 12... Locking protrusion, l3... Reel top protrusion, l4... Take-up (TU) reel,
l5... Reel hub, l6... Notch, 18...
Concave groove, l9... concavity, 20. 27...Protrusion,
2l...Locking part, 22...Sliding member, 2
3...Hook part, 24...Spring, 25...
- Holding plate, 26... Holding part. Inventor Hiromichi Hirayama

Claims (1)

[Claims] A reel hub on which a magnetic tape is wound, upper and lower flanges provided at the upper and lower ends of the reel hub, and a tape stopper fixed to the peripheral edge of the flange so as to press the end of the magnetic tape wound on the reel hub. A single tape reel adapter comprising: a casing having approximately the same external shape as a standard tape cassette and consisting of upper and lower halves, a take-up reel, and a reel holding part that holds the take-up reel and is attached to the inner surface of the upper half. The tape stopper is removably attachable, and includes a base portion located between the upper and lower flanges when attached, and an operation knob pivotally supported on the upper end portion of the base so as to be rotatable by a predetermined angle; In the single tape reel, the tape stopper is configured to be inserted into a notch provided in a reel hub of the take-up reel in the adapter and constitute a part of the reel hub, the operation knob of the tape stopper One surface is provided with a convex portion that can come into contact with the reel presser and act as a reel top when the tape stopper is attached to the reel hub of the take-up reel and the operation knob is placed sideways. A single tape reel characterized by: