JP2516070B2 - Single tape - Google Patents

Description

TECHNICAL FIELD The present invention relates to a single tape reel around which a magnetic tape (hereinafter, also simply referred to as a tape) which is a recording medium such as a VTR (video tape recorder) is wound. .

[Conventional technology]

A tape cassette that is generally used in a consumer VTR has a supply reel and a take-up reel inside, so a large storage space is required to store such a tape cassette, and it is also easy to carry. It was tough. To solve this problem, only a single tape reel wound with a magnetic tape is stored in a reel case, and the reel case is attached to an adapter having substantially the same shape as a standard tape cassette. Is shown in.

However, according to this, the tape wound around the tape reel may be easily fed out of the reel case, and the feeding portion may be damaged. Furthermore, when the adapter is attached, a predetermined tape path is formed. Workability was poor because the tape had to be pulled around by grasping a minute locking pin.

Therefore, the applicant of the present invention has a substantially same outer shape as the standard cassette, as shown in a side view of the open state in FIG. 12 and a perspective view of the closed state in FIG.
An upper and lower half open / close type cassette adapter capable of mounting a single tape reel 40 as a supply reel, the perspective view of which is shown in FIG.

This single tape reel 40 has a reel hub 41 around which the magnetic tape 4 is wound, an upper flange 42 and a lower franchise 43 provided at the upper and lower ends of the reel hub 41, and the tip of the wound magnetic tape 4. Upper flange 42 to hold down
And a tape stopper 50 fixed to the peripheral edge of the.

In this case, the upper flange where the tape stopper 50 is fixed
An engaging groove 44 is formed on the outer side surface of the peripheral edge portion of 42, and notches 45 cut inward in the radial direction are formed over the entire circumference at predetermined intervals. On the other hand, the tape stopper (hereinafter, also simply referred to as a stopper) 50 has a semicircular cross section, and cuts its longitudinal ends from both sides to form a locking portion 52 connected by a neck-shaped portion 51. Has been done. Then, when the neck-shaped portion 51 of the stopper 50 is inserted into the cutout portion 45 of the upper flange 42, the engaging force between the two and the convex portion 53 formed on the lower surface of the locking portion 52 fall into the engaging groove 44 and the upper portion The tape is fixed to the peripheral portion of the flange 42, whereby feeding of the tape can be prevented, and the poor workability of grasping a minute locking pin and moving the tape around is eliminated.

In addition, as for this stopper, the applicant of the present invention first applied for a patent application 63-301.
Attach the single tape reel to the cassette adapter proposed in 391, pull out the leader tape RT fixed to the stopper to form a predetermined tape path in the cassette, and then fix the leader tape to the take-up reel. Also used for. That is, as shown in FIGS. 16 and 17, the take-up reel 61 in which the tape 4 is housed in the adapter 30.
Although it is also provided when it is mounted on the reel hub 62, it also contributes to the improvement of workability.

[Problems to be Solved by the Invention]

In the above-mentioned conventional single tape reel, the tape does not easily loosen, and moreover, when the tape is wound around, the stopper can be held in the open space, and the workability is improved.

However, when passing the tape loosening prevention mechanism (between the SP guide ball and the tape pad, between the TU pole) on the supply (SP) side and the take-up (TU) side of the adapter, or when installing or removing the TU reel to or from the reel hub, use a small space. There is a problem that the workability is poor because the stopper must be gripped for the work.

Further, in the conventional single tape reel described above,
Since the fastening position is regulated by the notch portion 45 formed on the outer peripheral edge of the upper flange, even if the user wants to fasten in the middle of the notch portion due to the tape length, this cannot be dealt with. There were also points.

Furthermore, in the above-mentioned conventional single tape reel, when the TU reel 61 is mounted, the stopper simply fits in the groove. Therefore, for example, an adapter accommodating this single tape reel is mounted on the deck and wound. If the brake or sensor were to fail at the end of the return mode, the pulling force applied could easily cause the stopper to disengage from the hub, thus causing the tape to be dispensed into the deck.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a single tape reel capable of significantly improving the workability of laying out a tape in forming a tape path in a cassette adapter. And

[Means for solving the problem]

In order to achieve the above object, a single tape reel according to the present invention comprises a tape stopper having a base located between upper and lower flanges and an operation knob capable of rotating within a predetermined angle range at an upper end of the base. It is a thing.

Furthermore, the base of the stopper is provided with an abutting portion on the upper inner surface that abuts the axial inner surface of the peripheral edge of the upper flange, and the operation knob is in a standing state at one end within a predetermined angular range and in a laterally laid state at the other end. With this configuration, the upper flange can be held between the abutting portion of the base portion and the operation knob when the operation knob is in the sideways state.

[Action]

In the present invention, since the stopper having the operation knob rotatably supported at the upper end of the base is provided, the workability of laying out the tape in the cassette adapter for a single tape reel can be improved. You can Further, if the reel flange itself is positively sandwiched between the contact portion of the base portion and the operation knob, the reel flange can be fixed anywhere on the entire circumference of the upper flange and can be firmly attached to the reel hub.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the overall construction of an embodiment of a single tape reel of the present invention, FIG. 2 is an enlarged perspective view of a stopper portion of the same embodiment, FIG. 3 is its sectional view, and FIG. FIG. 7 is an exploded perspective view of the stopper removed from the flange.

In each of these drawings, the single tape reel 1 is configured such that the tape 4 is wound between an upper flange 2a and a lower flange 2b provided at the axial end of the reel hub. A tape stopper 5 is provided so as to press the tip of the wound tape 4, that is, the tip of a transparent leader tape.

Here, an annular groove 3 is formed in the peripheral portion of the upper surface of the upper flange 2a. On the other hand, the stopper 5 has a base 5a having a substantially semicircular cross section with one end cut out, and a U-shaped engaging portion 6 that fits with the peripheral edge of the upper flange 2a is formed on the upper portion of the inner surface thereof. There is. Further, a central portion of an upper end of the base portion 5a is cut out, and a knob portion 7 as an operation knob is rotatably supported by a rotary shaft 8 so that the base portion 5a can be tilted horizontally from an upright state. There is. In addition, the pin 9 is slightly displaced from the rotary shaft of the knob portion 7 toward the free end.
However, pins 10 are provided in the grooves at positions below the base 5a, and springs 11 as elastic members for applying a pulling force are hooked between these pins. This allows
If the knob portion 7 is erected as shown by the chain double-dashed line in FIG. 3, a leftward moment is applied in the drawing so as to maintain this state, and if the knob portion 7 is tilted to the right by a certain angle, This time, a rightward moment is applied to give a momentum to make it fall sideways as shown by the solid line, and maintain the sideways state shown in FIG. Ie this spring 11
As a result, the snap operation is performed when the knob portion 7 is brought from the upright state to the sideways inverted state or vice versa. Further, on the surface facing the upper flange 2a of the knob portion 7, there is formed a locking convex portion 12 which engages with the annular concave groove 3 when the knob portion 7 falls over. Then, as shown in FIG. 3, when the knob portion 7 is laid down sideways to engage the locking convex portion 12 with the annular groove 3, the U-shaped engaging portion 6 and the locking convex portion 6 are engaged. The peripheral edge portion of the upper flange 2a is sandwiched by 12 and the stopper 5 is prevented from slipping off from the upper flange 2a in the leftward direction in FIG.

A hole 13 is formed in the center of the knob portion 7 to prevent slipping when gripping the knob portion 7 to improve workability and also to allow the TU reel to escape to the reel top described later. It is designed to serve as both.

Here, the work of attaching / detaching the stopper 5 to / from the upper flange 2a will be briefly described.

First, as shown in FIGS. 1 to 3, it is assumed that the stopper 5 is attached to the upper flange 2a, and the knob portion 7 lying sideways is pulled up in the direction of arrow A in FIG. , Spring up to an angle determined by the position of pin 9
A force against the pulling force of 11 must be applied, but if this angle is exceeded, the spring 11 will generate a moment in the opposite direction, so a snap action will occur and the knob 7
Is held in the standing state shown by the chain double-dashed line in FIG. Further, by pulling up the knob portion 7, the locking convex portion 12 is disengaged from the annular concave groove 3. When the knob portion 7 is gripped and moved to the left in FIG. 3 in this state, the stopper 5 can be removed from the upper flange 2a as shown in FIG.

Next, at the time of mounting, as shown in FIG. 3, after engaging the U-shaped engaging portion 6 with the peripheral edge of the upper flange 2a, the knob portion 7 is tilted in the direction of the arrow B, and the locking convex portion is formed. 12 engages with the annular recessed groove 3, and clamps the peripheral edge of the upper flange 2a together with the U-shaped engaging portion 6, whereby it is firmly fixed to the upper flange 2a.

Incidentally, the stopper 5 can be freely mounted anywhere on the entire circumference of the upper flange 2a, and the mounting position is not restricted by the notch as in the conventional case.

Next, a case where the stopper 5 is attached to and detached from the hub of the take-up reel on the adapter side will be described with reference to FIGS. 5 to 8. Here, FIG. 5 is a perspective view showing a state before attaching the stopper 5 to the TU reel, FIG. 6 is a perspective view showing a state in which the stopper 5 is attached, and FIG. 7 is a sectional view showing a state in which the stopper 5 is attached, Figure 8 shows the reel hub 15 of the take-up reel.
FIG. 5 is a diagram showing a relationship between a locking convex portion 20 provided on the and a engaging groove 21 provided on the stopper 5.

In each of these figures, the base 5a of the stopper 5 is a TU reel.
The reel hub 15 has a semicircular cross section with one end cut out so as to form a part of the reel hub 15, and the reel hub 15 has a part cut out correspondingly to form a mounting portion 17.

Also, the upper flange 18 is cut out in an appropriate range as shown in FIG. 5 corresponding to the mounting portion 17, and further,
A gap G is formed as shown in FIG. 7 so that the U-shaped engaging portion 6 of the stopper 5 fits into the edge thereof, and the annular shape of the single tape reel 1 is formed on the upper surface of the upper flange 18. Groove 3
A concave groove 19 corresponding to is formed.

Further, as shown in FIGS. 5 and 7, the engaging projection 20 is provided on the bottom surface of the mounting portion 17, while the bottom surface of the stopper 5 is opened to the inner surface side as shown in FIG. A substantially L-shaped engaging groove 21 is formed.

Here, attachment / detachment of the stopper 5 to / from the reel hub 15 of the TU reel 14 will be described. First, in the state shown in FIG. 5, the knob portion 7 is gripped, and the opening portion of the engaging groove 21 is engaged with the locking convex portion 20 as shown in FIG. Take the stopper 5 and then shift it as shown by the arrow C in FIG.
Position. As a result, the stopper 5 is locked at a predetermined position of the mounting portion 17, and the stopper 5 constitutes a part of the reel hub 15. In this state, as shown in FIG. 7, the U-shaped engaging portion 6 of the stopper 5 is fitted to the upper flange 18. Then, when the knob portion 7 in the upright state is laid sideways in the direction of the arrow B, the locking convex portion 12 engages with the concave groove 19 and is firmly fixed to the upper flange 18 of the TU reel 14 as in the case of the supply reel described above. Is fastened. Moreover, the bottom surface of the stopper 5 is also engaged with the locking projection 12, so that the stopper 5 is never disengaged from the mounting portion 17. This state is shown in Figs. 6 and 7.
It is shown in the figure. Thus, even if the tape 4 shown in FIG. 6 is pulled, the stopper 5 does not come off from the TU reel 14, so that the leading end of the stopper 5 can be reliably prevented from being fed into the VTR.

As shown in FIGS. 6 and 7, the TU reel 14
The hole 13 has a knob 7 so that the reel top 16 of
It is not necessary to change the shape of the pressing leaf spring provided on the upper half side of the adapter or the shape of the TU reel.

On the other hand, in order to remove the stopper 5 from the state in which the TU reel 14 is mounted on the reel hub 15 shown in FIG. 6, it is possible to perform the operation completely opposite to that described above, and the knob portion 7 is raised to reverse the arrow C shown in FIG. By moving the stopper 5 in the direction
When it is removed from, it is set in the detached state shown in FIG.

In the above embodiment, the stopper having the base portion 5a having a shape completely different from that of the conventional stopper has been described. However, even the stopper described as the conventional device is shown in FIG. If the knob portion 7 is added as shown in each of the fastening states in the drawings, the workability is remarkably improved because the attaching / detaching operation and the tape routing operation can all be performed by grasping the knob portion 7 as described above. Will be improved.

In the above embodiment, the engaging portion 6 is provided on the base portion 5a of the stopper 5 to engage with the outer peripheral edge of the upper flange 2a.
Instead of this, as shown in FIG. 11, a step portion 6a is formed in the upper portion of the inner surface of the base portion 5b, and the step surface is brought into contact with the lower surface of the upper flange 2a, and the outer peripheral edge of the upper flange 2a is made by the knob portion 7. Even if they are sandwiched, the same workability as described above can be obtained.

〔The invention's effect〕

As is clear from the above description, according to the single tape reel of the present invention, the base portion located between the upper and lower flanges,
Since the tape stopper having the operation knob rotatably supported on the upper end of the base is provided, it is possible to remarkably improve each workability of laying out the tape in the cassette adapter for a single tape reel. it can. Further, if the upper flange is sandwiched between the contact portion of the base and the operation knob,
Can be attached anywhere on the entire circumference of the reel flange, and moreover,
The effect is that it can be firmly attached to the reel hub.

Further, if an annular groove is provided in the axial direction of the peripheral portion of the upper flange and a locking projection that engages with the annular groove is provided on the operation knob, more reliable fastening is possible.

Further, if one end is displaced from the pivotal support position of the operation knob toward the operation end and the other end is hooked to the base respectively to provide an elastic member, the operation knob is in a standing state where the stopper can be attached and detached and the stopper is fixed. The snap operation can be performed between the two laterally collapsed states, and the operability is significantly improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire embodiment of a single tape reel according to the present invention, and FIG. 2 is an enlarged perspective view showing an essential part of the embodiment, and FIG.
FIG. 4 is a sectional view thereof, FIG. 4 is an exploded perspective view of main elements of the same embodiment, and FIGS. 5 and 6 are inside a cassette adapter for a single tape reel without a stopper of the single tape reel according to the present invention. FIG. 7 is a cross-sectional view showing how the take-up reel is mounted on the hub, FIG. 7 is a sectional view thereof, and FIG. 8 is a view showing an aspect of how the stopper is mounted on the take-up reel, FIGS. 9 and 10. Fig. 11 is a perspective view showing still another embodiment, Fig. 11 is a sectional view showing still another embodiment, and Figs. 12 and 13 show an adapter for mounting a single tape reel previously proposed by the applicant. Perspective views, FIGS. 14 and 15 are perspective views showing a single tape reel previously proposed by the applicant, FIGS. 16 and 17
The figure is a perspective view showing a state where the stopper of the already proposed tape reel is removed and the tape reel is attached to the take-up reel. 2a ... upper flange, 2b ... lower flange, 3 ... annular groove, 4 ...
Tape, 5 ... Stopper, 5a, 5b ... Base part, 6 ... Engagement part, 6a
… Steps, 7… Knobs, 8… Rotating shafts, 9, 10… Pins, 11
… Spring, 12… Locking protrusion, 13… Hole, 14… Winding (T
U) reel, 15 ... reel hub, 16 ... reel top, 17 ...
Mounting part, 18 ... Upper flange, 19 ... Concave groove, 20 ... Locking convex part, 21
... engagement groove.

Claims (5)

(57) [Claims] 1. A reel hub around which a magnetic tape is wound, upper and lower flanges provided at the upper and lower ends of the reel hub, and a peripheral edge of the flange so as to press the end of the magnetic tape wound around the reel hub. In a single tape reel which is equipped with a tape stopper and has a substantially same outer shape as a standard tape cassette and which is detachably attached to a cassette adapter having a take-up reel, the tape stopper is provided between upper and lower flanges. A single tape reel comprising a positioned base portion and an operation knob pivotally supported on an upper end portion of the base portion so as to be rotatable within a predetermined angle range. 2. The base portion has an abutting portion that abuts an inner peripheral surface of the upper flange on an inner surface in an axial direction of the upper flange at an inner upper portion thereof, and the operation knob is erected at one end of the predetermined angle range. At the other end, in a sideways state, and in the sideways state, the peripheral portion of the upper flange is clamped together with the contact portion to fix the stopper, and in the standing state, the stopper is attached to the upper flange. The single tape reel according to claim 1, wherein the single tape reel is configured to be detachable from the tape reel. 3. The upper flange is provided with an annular groove on an outer peripheral surface in the axial direction, and the operation knob is provided with a locking projection that engages with the annular groove in the sideways state. 1
Alternatively, the single tape reel described in 2. 4. One end of the operation knob is deviated from the pivotal position of the operation knob in the tip direction of the operation knob, and the other end is hooked on the basis of the reference, so that the operation knob is in the upright state to the sideways state. 4. The single tape reel according to claim 1, 2 or 3, wherein each of the operation knobs is provided with an elastic member for performing a snap operation when the operation knob is urged when the operation is performed and when the operation is performed in the opposite state. 5. The single tape reel can be stored, the single tape reel is stored in a cassette adapter having a take-up reel, the stopper is removed from the upper flange, and a predetermined tape path is formed in the cassette adapter. After that, when the hub is mounted on the take-up reel, an opening engagement groove is formed on the base of the stopper so as to engage with a locking projection provided on the bottom surface of the mounting part of the take-up reel.
A single tape reel according to 1, 2, 3 or 4.