JPS60167178A - Tape cassette - Google Patents

Abstract

PURPOSE:To prevent damage of a tape and adhesion of dust caused by contact of a turning cover and man's hand in a tape cassette such as a metallic tape, a vapor deposited tape etc. by providing a special sliding mechanism. CONSTITUTION:The cassette consists of a pair of upper flat plate and lower flat plate 11 and two or more side plates, and a tape reel is incorporated in it. The cassette is provided with a notched part 25 which is continuous with an opening 15 formed on a side face, a turning cover 16 that covers the opening 15 and a sliding cover 33 that slides in a plane parallel to the lower flat plate 11 and covers the notched part 25. The lower flat plate has the first plane 26 parallel to the upper flat plate 10 and the second plane 28 parallel to the first plane and near to the upper flat plate and provided with a notched hole 27 in a part. The first sliding part 34 that slides in a plane lying between the first plane 26 and the second plane 28 and the second sliding parts 36, 37 that cover the notched hole 27 are provided in the sliding cover 33. Consequently, no damage is given to a tape when the tape is put in the cassette from pulled out state. When the turning cover and sliding cover are closed, protection of the tape is made possible avoiding adhesion of dust and contact with man's hand.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a parallel two-reel type tape cassette that stores tape such as magnetic tape, and in particular, when used for recording, playback, etc., the magnetic tape is pulled out to the outside of the tape cassette. This article relates to tape cassettes that are most suitable for use.

Conventional configuration and problems The rotary head type has been used as a home video tape recorder for a long time, but as is well known, the rotary head type video tape recorder (hereinafter referred to as VTR) is a magnetic tape (hereinafter referred to as tape). This device records and plays back video signals, etc. by pulling out the tape from a tape cassette containing a video head, winding the tape around a guide drum that rotates at high speed and guiding the tape.

For example, a tape cassette in the VH8, β system, etc. consists of a flat housing in which two reels of tape are housed in parallel on the same plane, and an opening is provided on the side of the housing. , the tape can be pulled out. When the tape is stored in the cassette, a rotating plate with a rotating fulcrum is installed at a predetermined position in the tape cassette case to prevent dust from adhering to the surface of the tape and from touching it. The tape serves as a lid to protect the opening.

By the way, the type of tape used in the VH5 and β systems is a tape using iron oxide mainly composed of γ-26□03, and is resistant to humidity and rust. However, with the spread of VTRs, the development of tapes has been encouraged as devices have become smaller and more sophisticated.
So-called vapor-deposited tapes that vapor-deposit o are about to become the mainstream of next-generation tapes.

Although VTRs using metal tapes or vapor-deposited tapes are compact and offer high image quality, they require greater care in handling and protecting the tape than with conventional iron oxide tapes. In particular, care should be taken to protect the tape when handling the tape cassette alone when it is not in use, such as from getting dust on the tape or touching it with human hands.

As is well known, in VH8 and β type cassettes, a rotary plate is provided as a cover over the tape draw-out opening of the tape cassette to protect the tape cassette from the outside. However, VH3 and β type cassettes have a V on the bottom of the cassette.
When set in the TR, there was an opening (notch) into which the tape pull-out member was inserted, and it was possible to intentionally touch the tape through that opening. For 8mm video, which has recently been announced as a standard and uses metal tape and vapor-deposited tape, the company has taken into account the problems of conventional tape cassettes and devised new tape cassettes. In particular, as a cover for the tape cassette opening, as shown in principle in FIGS. In addition to the first rotary plate 2, a second rotary plate 3 is provided.Then, the tape 4 in the area that is easily touched by hands is placed between the first rotary plate 2 and the second rotary plate 3. From when the tape cassette shown in Figure (al) is used to when the tape cassette shown in Figure 1 (b) is not used, the tape 4 is protected from being touched by human hands by rotating it in the direction of the arrow and inserting it in between. The aim is to

Therefore, the tape 4 cannot be directly touched from the opening 5 at the bottom of the tape cassette by the second rotating plate 3.

However, this method has the following drawbacks. That is, when the first rotating plate 2 and the second rotating plate 3 rotate with the tape 4 sandwiched between them to protect the tape, if the tape 4 is held in a straight line with a predetermined tension, There is no problem if the tape 4 is stretched evenly, but if due to some accident the tape 4 becomes loose and curls in the longitudinal direction, the tips of the two rotating plates 2.3 mentioned above will crush the tape 4. However, it has the disadvantage that it may not be possible to insert it.

OBJECTS OF THE INVENTION It is an object of the present invention to overcome the above-mentioned drawbacks and to provide an advantageous tape cassette using metal tape, vapor-deposited tape, etc.

Structure of the Invention The tape cassette of the present invention includes a pair of upper flat plates, an upper flat plate, and at least two or more side plates, and has a built-in tape reel. a rotating lid that covers the opening, and a sliding lid that slides in a plane parallel to the upper flat plate and covers the notch, the upper flat plate having at least a first opening parallel to the upper flat plate; Is the plane parallel to the first plane above? The sliding lid has a second surface that is close to the upper flat plate and has a cutout hole in a part thereof, and the sliding lid has a second surface that is slidable within a plane that is sandwiched between at least the first surface and the second surface. The tape is composed of a first sliding part, a second sliding part that covers the cutout hole, and a second sliding part that covers the cutout hole. When storing the tape in the cassette, the tape is not pinched, so the rotating lid does not damage the tape, and when the rotating and sliding lids are closed, there is no possibility that the tape will be covered with dust or touched by human hands. Reliable tape protection is possible without any damage. In addition, since the sliding lid only needs to be approximately the same size as the width of the notch in the cassette, it can be molded with resin, resulting in lower costs.Moreover, the sliding lid is easy to assemble to the main body, and is suitable for mass production. Furthermore, since the top plan view of the cassette can be constructed as a smooth surface without any protrusions, the shape of the holder for mounting the cassette into, for example, a recording/reproducing device can be simplified and smooth mounting can be achieved.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a plan view of a tape cassette according to an embodiment of the present invention. Figure 3 is a side view of the tape cassette, Figure 4 is a cross-sectional view taken along the -Y
This is a cross-sectional view taken along a line showing the inside of the tape cassette in an open state. FIG. 6 is a plan view showing the inside of the tape cassette of this embodiment, excluding the tape reel, and FIG. 7 is an exploded perspective view of the tape cassette of this embodiment as seen from the bottom.

As is clear from FIGS. 2 and 3, the tape cassette 6
The tape cassette 6 has a flat housing (cassette), and inside the tape cassette 6 is a pair of magnetic tapes 7 with the starting end or ending end fixed respectively, and the tape wound around the tape cassette 6. Two reels 8 and 9 are housed side by side on the same plane. The pair of tape reels 8 and 9 wound with tape are covered from above and below by an upper flat plate 10 and an upper flat plate 11.

In addition, wall portions are formed at three side surfaces 12, 13, and 14 in the thickness direction of the flat tape cassette 6 to protect the tape 7 from the outside world, but the − side surface is an opening 16 without a wall surface. When the tape 7 is not pulled out from the opening 15, the opening 16 is covered by a rotating lid 16 to protect the tape 7.

The tape cassette 6 according to this embodiment has a pair of tape reels 8 and 9 (however, tape reel 8 and 9 are shown in FIGS. 4 and 5).
(not shown) is a type without a flange, a so-called flangeless reel.

The child block 11-q has a taishi-men section and both side sections 17-18.
have. The boss portions 17 and 18 are formed in upper recesses 19. By being loosely inserted into and engaged with the lower recess 20, the position of the tape reel 8 in the planar direction inside the tape cassette 6 is loosely regulated. Two rectangular slippery sheets 21, 22 such as fluorocarbon resin sheets are provided on both end surfaces of the boss portion 17, 18, so that when the tape γ is wound on a tape reel, It plays a role as a means of regulating the winding when the winding is out of order, such as when the winding is out of order.

Incidentally, when the cassette is not in use, the tape 7 is pivoted at a position 23 at the rear of the opening 16, and the front surface of the tape 7 is covered by a pivotable cover 16 that can be rotated forward. The tape cassette 6 has a notch 25 continuous with the opening 16 formed in the upper flat plate 11 so that a tape pull-out member 24 for pulling out the tape 7 to the outside of the cassette can be inserted into the cassette.

Further, as shown in FIG. 7, the upper flat plate 11 has a first surface 26 parallel to the upper flat plate 10, a notch hole portion parallel to the first surface 26, and close to the upper flat plate 10. 27, and further includes a third surface 28 that includes the notch 25, is parallel to the first surface 26 near the opening, and is also closer to the upper flat plate 10 than the first surface 26. and a fourth surface 31.32 which is parallel to the first surface 26 and closer to the upper flat plate 1o than the second surface 28. Furthermore, when the cassette lid is closed, the sliding lid 33 for covering the notch 26 slides within the plane sandwiched between the tenth surface 26 and the second surface 28 in order to protect the tape from dust and human hands. covering the moving first sliding portion 34 and the notch hole portion 27;
A second sliding portion 36 that fits into the cutout hole portion 27 and slides thereon, and a third sliding portion that slides within a plane sandwiched between the third surface 29.30 and the fourth surface 31.32. sliding parts 36 and 37
It is made up of. Therefore, the first surface 2 of the upper flat plate
6 and the first sliding portion 34 of the sliding lid may be on the same surface.

By the way, in order to attach the sliding lid 33 to the cassette body, the second sliding lid 33 is placed on the stepped notched sliding surface 38.39 provided in the notched hole 27 of the upper flat plate 11.
The stepped sliding portion 40.41 formed in the sliding portion 35 of the third sliding portion 36.37 of the sliding lid 33 is placed thereon.
on the third surface 29.30 of the upper flat plate until the first sliding part 34 of the sliding lid overlaps a part of the second surface 28. 33 slightly to the rear of the cassette. The upper flat plate 10 has an end surface 44 of a convex portion 43 on a wall 42 behind the opening 15 to restrict the second sliding portion 35 of the sliding lid from rising up. The flat plate 10 and the upper flat plate 11 are overlapped and the sliding lid 33 is attached to the cassette.

Further, the floating of the sliding lid 33 is restricted by the end surface of the convex portion 43 of the wall surface 42 behind the opening, and also by a height regulating member 45 provided inside the cassette of the upper flat plate 10.
．． 46.

As shown in FIG. 6, inside the cassette is the sliding lid 33.
A biasing means 47 is disposed for biasing the sliding lid 33 in the direction of the opening 16, and the biasing means 47 is provided at the contact portion of the sliding lid 33 with the biasing means 47. A concave groove 48 is formed in the abutting portion of the sliding lid 33 so that the sliding lid 33 is not biased.

Further, the second sliding portion 35 of the sliding lid is provided with a protruding locking means 49 for locking the sliding lid 33 in the direction of the opening 15. .

By the way, when using a cassette,
As shown in the figure, a sliding lid moving means 50 for moving the sliding lid 33 covering the notch 26 rearward.
51 moves in the direction of arrow B, passes through a notch 62° 53 formed in the end face of the rotating lid 16, presses one end face of the sliding lid 33, and pushes the sliding lid 33 against the biasing means. 47 and move the tape drawer member 24 backward against the biasing force of the tape 7 to pull out the tape 7 to the outside of the cassette.
The tape 7 can be drawn out by inserting it into the space 64 at the rear of the tape 7 and rotating the rotating lid 16 using a suitable lid pushing means (not shown).

Conversely, when you want to stop using the cassette, you can take out the tape pull-out member (not shown) from the space area 64 to the outside of the cassette and lower the lid lifting means (not shown). The rotating lid 16 rotates to cover the front surface of the tape 7, resulting in a state as shown in FIG.

Therefore, when the cassette is not in use, the tape 7 is
6 and the above-mentioned sliding lid 33, no human hands touch the tape and no dust or the like adheres thereto. Moreover, when moving from a cassette-used state to a cassette-free state,
Even if the tape 7 is slightly slack at the notch, the rotating lid 16 and the sliding lid 33 will not catch the tape and damage it. Furthermore, the sliding lid 33 only needs to have a size approximately equal to the width of the notch of the cassette, and can be easily molded with resin, and the sliding lid 33 can be easily attached to the cassette, leading to cost reduction. In addition, since the lower half of the cassette, including the sliding lid, can be constructed as a smooth surface without any protrusions, the shape of the holder for mounting the cassette in, for example, a recording/playback device can be simplified and smooth mounting can be achieved. .

Effects of the Invention The tape cassette of the present invention does not pinch the tape when storing the tape in the cassette from the tape-out state, so the tape is not damaged by the rotating lid.
Furthermore, when the rotating lid is closed, the tape can be protected reliably without dust adhering to the tape or touching it with human hands. Furthermore, the sliding lid has a size approximately equal to the width of the notch of the cassette, and can be easily molded with resin. Furthermore, it is easy to attach to the cassette body, resulting in good assembly efficiency and cost reduction. moreover,
Since the lower half of the cassette, including the sliding lid, can be configured as a smooth surface with no protrusions, the shape of the cassette holder for mounting the cassette in a recording/reproducing device, for example, can be simplified.
It also has the advantage of allowing smooth installation.

[Brief explanation of drawings]

1(al) and (b) are schematic sectional views of main parts of a conventional tape cassette in an open state and a closed state, FIG. 2 is a plan view of a tape cassette according to an embodiment of the present invention, and FIG. 3 4 and 6 are X-Y sectional views of FIG. 2 in the closed and open states, respectively. FIG. 6 shows the inside of the tape cassette of this embodiment, with the tape reel 7 is an exploded perspective view of the tape cassette of this embodiment seen from the bottom. 6... Tape cassette, 7... Tape, 8.9... ...Tape reel, 10...
Upper flat plate, 11... Upper flat plate, 16... Opening, 16... Rotating lid, 26... First
Surface, 27... Notch hole portion, 28... Second surface, 29... Third surface, 31.32...
...Fourth surface, 33...Sliding lid, 34...
...First sliding part, 36°37...Third sliding part, 47...Biasing means, 49...Locking means. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure (L) (b) 2-15, -X Figure 3 Figure 6 Figure 7 Figure 7

Claims (1)

[Scope of Claims] (1) A tape cassette comprising a pair of upper flat plates, an upper flat plate, and at least two or more side plates, and having a built-in tape reel, the notch being continuous with the opening formed on the - side. and,
A rotating lid that covers the opening and a sliding lid that slides in a plane parallel to the upper flat plate and covers the notch, the upper flat plate having at least a first surface parallel to the upper flat plate. and a second surface that is parallel to the first surface and is close to the upper flat plate, and further has a cutout hole in a part thereof, and the sliding lid
A tape cassette comprising a first sliding part that slides within a plane sandwiched between a surface and a second surface, and a second sliding part that covers the cutout hole. (Threshold) The tape cassette according to claim 1, characterized in that the second sliding portion is configured to fit into the cutout hole and to be slidable. a third surface that is parallel to the first surface near the opening and is closer to the upper flat plate than the first surface, and a third surface that is parallel to the first surface and also closer to the second surface; and a fourth surface close to the upper flat plate, and the sliding lid slides within a plane sandwiched between the third and fourth surfaces. A tape cassette according to claim 1 or 2, characterized in that the tape cassette is provided at both ends.
The tape cassette according to claim 1, 2 or 3, wherein the tape cassette slides inside the throat. (Phrase) Claims 1, 2, and 3, characterized in that the second sliding part is provided with a locking means for locking the sliding of the sliding lid in the direction of the opening. Still, the tape cassette according to claim 4. (6) Claim 1, characterized in that a biasing means for biasing the sliding lid toward the opening is provided inside the cassette.
Tape cassette described in section.