JPS6239510B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a VTR tape cassette for long-term recording and playback, which forms an opening for pulling out the tape to the loading side of the VTR and fits into a mounting case provided on an existing VTR. A first case of a suitable size and a second case that can store a large amount of tape for long-term use are integrated, and the tape stored in the second case is guided to the open side of the first case. It is.

An embodiment of the present invention will be described below based on the drawings.

Fig. 1 is an overall view of a VTR, Fig. 2 is a plan view of a cassette according to the present invention, and Fig. 3 is an A-A in the previous figure.
A line view, FIG. 4 is a view taken along the line B--B in FIG. 2.
Reference numeral 1a designates a first case which is provided with grooves 9, 9 that are slidably fitted to the edge of the cassette mounting portion S of the VTR V, and is formed to a size corresponding to the cassette mounting portion S;
Case 1a is between a pair of guide poles 6 and 7.
Opening part 8 for pulling out the tape T to the loading side of the VTR (usually has an opening/closing lid)
, guide poles 11, 12 corresponding to the guide poles 6, 7, and these guide poles 6, 7, 1.
The tape T guided by 1 and 12 is placed in the second case 1b.
Lower guide member 1 formed in an inverted conical shape to guide the
3 and 14, and further provided are reels 2 and 3 which fit onto a pair of drive reel shafts a and b of the VTR and have gear elements 2g and 3g formed on their circumferential surfaces. The reels 2 and 3 are pressed downward by plate springs 15 and 16 provided on the upper part of the first case 1a, and are fixed downward by the pressing force of the plate springs to fit the drive reel shafts a and b. Lock portions 10, 10 are provided which are thereby released.

The second case 1b is larger than the first case 1a, is integrally formed therewith, and is internally connected to the first case 1a. The second case 1b is a lower guide member 1 of the first case 1a.
upper guide members 17, 18 formed into conical shapes corresponding to the guide members 17, 14; and gears corresponding to the guide members 17, 18 and meshing with the gear elements 2g, 3g of the reels 2, 3 of the first case 1a; It consists of reels 4 and 5 with elements 4g and 5g provided at the lower part of the circumferential surface.

In this way, the large amount of long-time tape T wound around one reel 4 of the second case 1b as a supply reel includes the upper guide member 17, the lower guide member 13, the guide poles 11 and 6, the guide poles 7 and 12, and the lower guide pole. It is wound onto the other take-up reel 5 via the guide member 14 and the upper guide member 18 in this order. These reels 4 and 5 are the drive reel shafts a and b of the VTR V.
The reels 2 and 3 of the first case 1a are connected to the reels 2 and 3 of the first case 1a through gear elements 2g, 3g, 4g, and 5g.

The reference numeral 19 shown in FIG.
When the mounting part S of the V is fitted and the mounting part S is moved down to the playing state, the bottom side of the second case 1b is pressed and switched, and when the long-time cassette with the second case 1b is mounted. The torque is changed according to the diameter of the reel.

When the cassette is not in use, the reels 2 and 3 of the first case 1a are connected to the locking portion 1 via leaf springs 15 and 16.
0 and 10, and the movement of the reels 2 and 3 is prevented by gear elements 2g, 3g, and 4.
Reels 4 and 5 of the second case 1b via g and 5g
In conjunction with this, the reels 4 and 5 are prevented from floating.

When the cassette is in use, when the drive reel shafts a and b fit into the reels 2 and 3 of the first case 1a, the reels 2 and 3 move upward against the leaf springs 15 and 16 and are removed from the lock parts 10 and 10. Once removed, the reels 2, 3 are rotated by the drive reel parts a, b. At this time, a winding device and a back tension device (not shown) provided on the drive reel shaft a itself or the plate springs 15 and 16 prevent the reels 2 and 3 from floating during driving, and the gear elements 2g, 3g, 4g, 5g
It also operates in conjunction with the reels 4, 5 of the second case 1b via the reels 4, 5 to apply a winding action and back tension to the reels 4, 5, or to prevent them from floating.

As described above, the present invention includes a first case formed to a size corresponding to the cassette mounting portion S of a VTR V, and a pair of reels 4 and 5 that are interlocked with the reels 2 and 3 of the first case, respectively. Then the reel 4,5
a second case which is formed larger than the first case so that a large amount of tape T can be wound thereon, and a winding diameter of the tape can be formed larger;
The existing case and the second case are integrally formed, and the mounting part S corresponding to the first case is provided.
By attaching a second long-time case having a larger winding diameter than the first case to the VTR V, long-time recording and playback can be performed.

Further, the reels 2 and 3 of the first case are provided with locking members 10 and 10 for the reel's movement prevention member, and the reels and the reel 4 of the second case are
5 are interlocked and connected through the gear element, so that the reel of the second case can be prevented from floating through the gear element when the cassette is not in use.

Furthermore, a leaf spring 1 is attached to the reels 2 and 3 of the first case.
Lock members 10 and 1 for preventing movement via 5 and 16.
0 and gear elements 2g, 3g, 4g, and 5g are formed on the reels 2, 3, 4, and 5, so that when the reel of the first case is fitted to the drive reel shaft and rotated, the reel The winding action, back tension action and anti-slip action of 2 and 3 can be interlocked and connected to the reels 4 and 5 of the second case.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and
Fig. 1 is a general schematic view of the VTR, Fig. 2 is a plan view of the cassette, Fig. 3 is a view taken along line A-A in the previous figure, and Fig. 4 is a view taken along line B-B in Fig. 2. be. V...VTR, S...cassette mounting section, T...
Tape, a, b... Drive reel shaft, 1a... First
Case 1b... Second case, 2, 3, 4, 5...
... Reel, 2g, 3g, 4g, 5g ... Gear element, 6, 7 ... Guide pole, 8 ... Opening part, 1
0, 10... Lock member for preventing movement, 15, 16
...Flat spring.

Claims (1)

[Claims] 1. A second case 1b is integrally formed below the first case 1a, and the reels 2, 3 of the first case 1a are attached to guide poles 6, 7 provided in the open part 8 of the second case 1b.
A tape cassette is provided with reels 4 and 5 that are fitted with the drive reel shafts a and b of the VTR V unit from the bottom side of the second case 1b, with one end attached to the cases 1a and 1b. gear elements 2g, 3g, 4g,
The other reel 4, which is constantly connected via 5g,
5 is pivotally supported on the other end of the leaf springs 15, 16, and the reels 4, 5 are fitted to the reel shafts a, b by the pressing force from above of the leaf springs 15, 16 to prevent the second case 1b from drifting. The reels 4 and 5 are locked by the locking members 10 and 10, and the fixing action of the reels 4 and 5 by the plate springs 15 and 16 is lifted and released by the engagement of the reel shafts a and b. A tape cassette for VTR.