JPS637985Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cassette, and particularly to a tape cassette suitable for efficiently discharging so-called endless tapes whose starting and ending ends are connected.

As such a tape cassette, for example, a tape cassette as shown in FIG. 1 has been proposed. Figure 1 shows the internal structure of the endless tape cassette when the upper half is removed. In the figure, 1 is the lower half, 2 is the endless tape, 3 is the tape guide member installed in the lower half 1, Reference numeral 4 designates a tube for a tape guide fitted into the guide member 3, and reference numerals 5 and 6 designate elastic tape back tension members that also serve as tape guides. These members 5 and 6 are attached to the lower half 1 so that their ends abut each other and sandwich the tape 2, thereby holding the tape 2 in place.
I try to apply back tension to. It should be noted that a super high polymer material such as Teftron is attached to the portions of the tape back tension members 5 and 6 where they come into contact with each other in order to smooth the flow of the tape.

7 and 8 are cylindrical members for the tape guide fixed to the lower half 1; 9 is a roller member for the tape guide loosely fitted to the pin 10 attached to the lower half 1; 11 is for winding the tape 2; a tape take-up reel rotatably mounted on the lower half 1;
2 is a reel pressure bonding plate placed on one side of the take-up reel 11. When a tape cassette is loaded into a VTR or the like, the take-up reel 11 is slightly lifted by the reel stand (not shown), so push the crimp plate 12 on the reel 11 with the protrusion (not shown) on the upper half. This allows the reel 11 to be held elastically. Further, a slip prevention member such as a rubber ring 13 is fitted on the outer periphery of the reel 11 in order to prevent the tape 2 from slipping.

14 is an elastic tape crimping member whose one end is attached to the lower half 1 and whose other end is arranged to press the tape 2 moving on the rubber ring 13; A super high polymer material such as Teflon is attached to improve tape feeding. 15 has one end as the lower half 1
It is an elastic tape ejection member that is attached to the rubber ring 13 and has its other end extending over the rubber ring 13.
As the tape 1 rotates, the tape 2 is discharged into a reservoir near the center of the lower half 1.

16 is a reel stopper for preventing reversal;
One end is fitted into a pin 16' attached to the lower half 1, so that it can swing around this pin 16' as a fulcrum. 17 has one end in contact with the tape 2 between the cylindrical member 8 and the roller member 9, and the other end in contact with the reel 11.
A reel stopper driving piece is attached to the lower half 1 so as to come into contact with the upper rubber ring 13 and assume a predetermined elastic shape, and the bent part of this driving piece 17 also comes into contact with the reel stopper 16. When the tape 2 is being transported in the forward direction indicated by the arrow, even if the reel stopper 16 is separated from the rubber ring 13 on the reel 11, the tape 2
When the reel 11 is transferred in the opposite direction to the arrow, the reel 11 is forcibly bent as the reel 11 is reversed, and the reel stopper 16 in contact with the reel stopper 16 is rotated clockwise in the drawing with the pin 16' as a fulcrum. As a result, the tip of the reel stopper 16 comes into contact with the rubber ring 13 on the reel 11, suppressing the rotation of the reel 11 in the opposite direction, thereby preventing the tape 2 from being transferred in the reverse direction.
Note that one end of the drive piece 17 also functions to prevent the tape 2 from sagging, and a super high polymer material such as Teflon is adhered to this part.

Also, 18 is the lid lock lever, 19 is the lever 1
This is a spring member that is attached to one end of the lever 8 and allows the lever 18 to rotate by a predetermined amount as necessary.

As the rubber ring 13 and tape ejection member 15, for example, those shown in FIGS. 2 and 3 have been conventionally used. That is, in FIG. 2, the rubber ring 13A is wider than the width of the tape ejection member 15A, that is, the tape width, and
The other end, that is, the tip end of 5A is in contact with the rubber ring 13A, while in FIG.
The width of the rubber ring 13B is narrowed to substantially half the tape width, and the other end of the tape ejection member 15B is shaped as a recess so as to straddle the rubber ring 13B so that the tape ejection member 15B does not come into contact with the rubber ring 13B. There is.

However, in the case of a conventional tape cassette using a rubber ring and a tape ejecting member constructed as shown in FIGS. 2 and 3, there have been various drawbacks as described below.

That is, in the case of FIG. 2, the tape ejection member 15A
Since the tip of the tape comes into contact with the outer peripheral surface of the rubber ring 13A on the reel 11, friction occurs between the rubber ring 13 and the surface of the rubber ring 13, creating a load when winding the tape and requiring unnecessary force. Furthermore, since the tip of the tape ejection member 15A comes into contact with the outer circumferential surface of the rubber ring 13A, the surface of the rubber ring 13 is abraded and its durability is impaired, and debris is generated, causing the tape 2 to become dirty. Further, when the tape 2 sticks to the surface of the rubber ring 13, it becomes impossible to completely discharge the tape 2, and there is a problem that the tape 2 winds around the reel 11.

Further, in the case of FIG. 3, the width of the rubber ring 13 on the reel 11 is narrower than the tape width, so when the tape 2 is pulled, for example, the tape 2 is
If the tape 2 moves above the tape 1 and is ejected only on one side, the tape 2 will be deformed, and if it is used many times in this state, the magnetic head (not shown) that the tape 2 scans will eventually become distorted. This will cause the hit to change and cause image quality to deteriorate.

This invention has been made in view of the above, and is intended to provide a tape cassette which can reliably eject the wound tape without the above-mentioned drawbacks.

Hereinafter, one embodiment of this invention will be described in detail based on FIGS. 4 to 9. Note that only the parts related to this idea are shown here.

FIG. 4 shows the configuration of this embodiment, where 21 is a tape take-up reel, 22 and 23 are reels 2 and 23.
A narrow slip prevention member, such as a rubber ring, is fitted into the cylindrical portion of the slipper at a predetermined interval. To attach these rubber rings 22 and 23, for example, as shown in FIG.
Rubber rings 22 and 23 may be fitted into these recesses 21a and 21b, respectively, as shown by broken lines. As a result, the rubber rings 22, 2 are substantially
3 is positioned so that it touches the top and bottom of the tape width. As the reel 21 rotates, the tip of a tape discharging member 24 (FIG. 4), which will be described later, runs substantially over the convex central portion 21c that separates the recesses 21a and 21b at a predetermined interval. FIG. 6 shows a plan view taken along line A-A' in FIG. 5, in which the rubber ring 23 (FIG. 4) is fitted into the recess 21b indicated by the lined line. It turns out.

The tape ejection member 24 has elasticity and has a narrowed tip 24a as shown in FIG. ring 2
By fitting the rubber rings 2 and 23, each side of the rubber rings 22 and 23 and the center portion 21c of the reel 21 are inserted into a groove 25 formed near the center of the cylindrical portion of the reel 21. Therefore, the tip end 24a of the tape discharge member 24 enters inside the outer peripheral surfaces of the rubber rings 22 and 23 and comes into contact with the bottom of the groove 25, that is, the outer peripheral surface of the central portion 21c of the reel 21.

When the reel 21 is rotated in the direction of arrow a and the tape 2 is moved in the same direction as shown in FIG. The tape 2 is driven substantially above and below the tape width, so that the tape 2 is smoothly introduced into the tape discharge member 24 and discharged.

In this way, in this embodiment, a plurality of anti-slip members, that is, rubber rings 22 and 23 are arranged so as to be in contact with each other at the top and bottom of the tape width, and the tips 24a of the rubber rings are positioned in the groove 25 formed between these two rings. The tape ejection member 24 arranged so as to reliably eject the tape 2 wound up on the reel 21.

Figure 8 shows another embodiment of this invention.
Similar to FIG. 6, this shows the case where the cut is taken along line A-A' in FIG. 5. In the embodiment described above, the outer peripheral surface of the central portion 21c of the reel 21 is flat, but in this embodiment, as shown in FIG. The groove 25 has a kind of cam structure, which prevents the tape 2 and the tape ejection member 24 from being damaged by static electricity, etc.
This prevents the tape 2 from sticking to the tape 2 and efficiently feeds the tape 2 to the inner part of the tape reservoir (the central part where the tape of the lower half 1 forms a spiral shape in FIG. 1).

Now, when the reel 21 having the structure as shown in FIG. 8 is rotated in the direction shown by the arrow a in FIG. Because it is in contact with
The rotation of the reel 21 causes the tape ejection member 24 to vibrate in the vertical direction with respect to its surface. In other words, when the tip end 24a of the tape ejection member 24 is in contact with the flat part of the groove 25 (corresponding to the center part 21c in FIG. 8), the tape ejection member 24 is in the form shown by the broken line.
The tip 24a is the protrusion of the groove 25 (the protrusion 21 in FIG.
d), the tape discharge member 24 receives forces acting outward as shown by arrows b and c and lifts up as shown by the solid line, and as a result, the tape ejection member 24
Depending on the state in which it is in contact with, it will be subjected to vibrations as shown by arrow d.

Therefore, the tape 2 passing over the tape ejection member 24 is efficiently ejected without sticking to the tape ejection member 24.

In this way, the same effects as those of the above-mentioned embodiments can be obtained in this embodiment, and furthermore, since this embodiment has a structure in which the tape ejection member vibrates in accordance with the rotation of the reel, the tape and the tape ejection member Sticking of the tape can be more effectively prevented, and the tape can be efficiently fed to the back of the tape reservoir.

As described above, according to this invention, a plurality of slip prevention members are arranged at predetermined intervals on the take-up reel, and the tip of the tape ejection member is positioned in the gap, or groove 25, of these slip prevention members. As a result, the rolled tape can be ejected reliably and smoothly without causing any shape deformation to the tape even after multiple uses, and the problems such as deterioration of image quality that occurred in the past are eliminated. Ru.

In the above embodiment, the case where two slip prevention members are used has been explained, but if a plurality of more slip prevention members are used, the tip of the tape ejection member also fits into the gap created by the slip prevention members. It may be used by branching into a plurality of parts depending on the situation.

Further, in the above-described embodiment, the cam structure was used on the reel side to vibrate the tape ejection member, but other structures such as an uneven shape may be used as long as the same vibration effect can be obtained.

Furthermore, although the above-described embodiments have been described with reference to the case where an endless tape is transported, it goes without saying that the present invention can be similarly applied to cases where the tape is transported in one direction.

[Brief explanation of the drawing]

Figure 1 is an internal structure diagram showing an example of a tape cassette wrapped with endless tape, Figure 2 A and B
3 is a perspective view and a plan view showing an example of a conventional tape ejection mechanism, FIGS. 3A and 3B are perspective views and a plan view showing another example of a conventional tape ejection mechanism, and FIGS. 4A and B are views of the present invention. A perspective view and a plan view showing one embodiment, FIG. 5 is a structural diagram showing an example of the main part of this invention, FIG. FIG. 7 is a structural part showing an example of the main part of this invention, FIG. 8 is a plan view showing another embodiment of this invention, and FIG. 9 is a plan view for explaining the operation of FIG. 2 is an endless tape, 21 is a tape take-up reel, 22 and 23 are rubber rings, 24 is a tape discharge member, and 25 is a groove.

Claims (1)

[Scope of utility model registration request] A tape cassette in which a plurality of slip prevention members are arranged at predetermined intervals on a take-up reel, and the tip of a tape ejection member is positioned in the gap between the slip prevention members.