JPS60124084A - Tape cassette - Google Patents

Abstract

PURPOSE:To avoid injuries to a tape by a rotary cover as well as a finger touch or dust attraction to the tape when the cover is closed, by sliding a slide cover which covers a cut part within an area held between two parallel surfaces. CONSTITUTION:In a cassette non-use mode a rotary cover 16 supported by a pivot at a position 26 behind an opening part 15 covers the front side of a tape. A cut part 27 continuous to the part 15 is formed to a lower flat plate 11 for insertion of a cassette to the inside. The plate 11 contains the 1st surface 28 parallel to an upper flat plate 10 and the 2nd surface 29 which is parallel to the surface 28 and close to the plate 10. A slide cover 30 which covers a cut part 27 is set so as to slide within a surface 34 held between both surfaces 28 and 29. This avoid a finger touch or attraction of dust, etc. to the tape. Furthermore both covers 16 and 30 never injury the tape although it has some sag at the part 27 when a cassette use mode is changed to a cassette non-use mode.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a two-reel running tape cassette for storing tape such as magnetic tape, and in particular, when used for recording, page recording, playback, etc. The present invention relates to a tape cassette that can be easily used by pulling out the tape.

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 pulls out a tape from a tape cassette containing a video head, wraps the tape around a kite drum that rotates at high speed, and guides its movement to record and play back video signals.

For example, tape cassettes used in the VH8 and β systems consist 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, in order to prevent dust from adhering to the surface of the tape and to avoid touching it with your hands, the tape cassette is rotated to a predetermined position. The plate serves as a lid over the opening to protect the tape.

By the way, the type of tape used in the VH8, β system is a tape using iron oxide mainly composed of γ-Fe, .05, and is resistant to moisture and rust. However, with the spread of VTRs, the devices became smaller and
The development of tapes has been promoted as higher performance has been sought, and recently, so-called metal tapes coated with pure iron powder, and so-called vapor-deposited tapes coated with sunda, nto(0), are becoming 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, VH8 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 pulling member was inserted, and it was possible to intentionally touch the tape through that opening. For 8mm video, which recently announced a standard that uses metal tape and vapor-deposited tape, we have taken into consideration the problems with conventional tapes 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 rotating plate 2, a 20th rotating plate 3 is provided. Then, the tape 4 in areas that are easily touched by hands is moved between the first rotary plate 2 and the second rotary plate 3 from when the tape cassette shown in FIG. 1(a) is used to when the tape cassette shown in FIG. 1(b) is used. When in use, the tape 4 is protected from being touched by human hands by rotating it in the direction indicated by the arrow and inserting it between the tapes.

Therefore, the opening 6 on the bottom of the tape cassette is blocked by the 5th page and 20th rotating plate 3, and the tape 4 cannot be accessed directly by human hands! It cannot be finned.

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 straight, 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 and 3 may 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 force concentration using metal tapes, vapor-deposited tapes, etc.

Structure of the Invention The tape cassette of the present invention is a tape cassette comprising a pair of upper flat plates, a lower flat plate, and at least two or more side plates, and has a built-in tape reel, and has an opening formed on the - side 6 page surface, and the above-mentioned side plate. The device includes a notch formed in a lower flat plate that is continuous with the opening, a rotating lid that covers the opening, and a sliding lid that slides in a plane parallel to the lower flat plate and covers the notch. , the lower flat plate has a first surface parallel to the upper flat plate, and a second surface including the notch and near the opening, parallel to the first surface and close to the upper flat plate, The sliding lid is configured to slide within a plane sandwiched between the first surface and the second surface, so that when storing the tape in the cassette from the tape drawn state, Since the tape is not pinched, the rotating lid does not damage the tape, and when the rotating lid is closed, the tape can be securely protected without dust adhering to it or touching it. Moreover, since the sliding lid does not fit inside the cassette but slides on the outside surface, there is no cutout hole for inserting the sliding lid inside the cassette, or it is very small, which can prevent dust from entering through the notch hole. In addition, the sliding lid requires only a flat plate with a size almost equal to the width of the notch in the cassette, making it easy to mold with resin and making it possible to make 7 pages at a low price. Since the tape cassette can be configured to have a smooth surface, the shape of the holder for mounting the cassette on, for example, a recording main device can be simplified, and a tape cassette that can be smoothly mounted can be realized.

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, and FIG. 3 is a side view thereof.

It is clear from Figures 2 and 3 that the tape cassette 6
has a flat cassette (cassette) appearance, and a magnetic tape 7 (hereinafter abbreviated as tape 7) is fixed at its starting end or end, respectively, inside the tape cassette 6. A pair of tape reels 8 and 9 around which tape 7 is wound are housed side by side on the same plane.

A pair of tape reels 8 and 9 on which the tape 7 is wound are covered from above and below by an upper flat plate 1o and an upper flat plate 11.

The side walls 12, 13, and 14 at 03 points in the thickness direction of the flat tape cassette 6 are walled to protect the tape 7 from the outside world. The tape 7 can be pulled out from this opening 15. Incidentally, normally, when the tape cassette 6 is not in use, that is, when the tape is not pulled out, the opening 15 is covered by a rotating lid 16 to protect the tape.

FIG. 4 is a sectional view taken along the line X=Y in FIG. 2, showing the inside of the tape cassette 6 when it is not in use.

FIG. 5 is also a sectional view taken along the line X-Y in FIG. 2, showing the inside of the tape reel 1-6 when it is in use. I cut it,
FIG. 6 is a bottom view of the tape cassette of this embodiment, and FIG. 7 is a partial sectional view taken along line m--n in FIG. 6. The tape cassette 6 according to this embodiment includes a pair of tape reels 8.9
(However, Fig. 4.

The reel (tape reel 9 is not shown in FIG. 6) does not have a flange, which is a so-called flangeless reel.

In other words, the tape reel 8 has only nine pages, in which the tape 7 is wound around the outer periphery of the tape reel 80 and the winding drum 17. Further, the tape reel 8 has boss portions 18 and 19i having a smaller diameter than the winding drum 17 at both ends in the axial direction.

The boss portions 18 and 19 are loosely inserted and engaged with the upper four portions 20 and the lower four portions 21 provided on the upper and lower inner flat surfaces of the cassette housing, so that the inside of the tape cassette 6 can be easily inserted and engaged. The position of the tape reel 8 in the plane direction is loosely regulated. The end face of the boss 18, 19 and the upper recess 20 of the cassette. Between the lower concave portion 21 is a thrust bearing with lubricating properties such as a fluoride resin sheet 22 and 23.
intervening to ensure smoothness when the tape reel rotates 80 times. Further, a winding drum 17 is provided on both end surfaces of the winding piece 17.
Two rectangular sheets (24, 25) with lubricating properties such as fluoride resin sheets are placed at positions where they touch each other lightly so as to sandwich the tape (24) and (25).
It plays a role as a means of regulating the winding when it is out of order due to paragraph breaks, etc.

Incidentally, when the cassette is not in use, the front surface of the tape 7 is covered by the rotary lid 16 which is pivotally supported at a position 26 rearward from the opening 16 and is rotatable for 10 pages. The tape cassette 6 has a notch 27 continuous with the opening 16 formed in the upper flat plate 11 in order to insert a tape pull-out member (not shown) for pulling the tape 7 out of the cassette into the cassette. has been done.

Further, the upper flat plate 11 includes a first surface 28 parallel to the upper flat plate 10 and the notch 27, and near the opening 16,
It has a second surface 29 parallel to the first surface 28 and close to the upper flat plate 10, and has a second surface 29 that is parallel to the first surface 28 and close to the upper flat plate 10.
A sliding lid 30 is disposed to cover the cutout portion 2a so as to slide within a plane sandwiched between the surfaces 29 and 29.

The sliding i30 also includes a first lid portion 31 having a size substantially equal to the size of the notch portion 270, a second lid portion 32 having a width smaller than the first lid portion 31, and the second lid portion. It consists of a third lid part 33 whose width is slightly larger than the width of the third lid part 32. In the wall surface 34 between the first surface 2B and the second surface 29 of the upper flat plate 11 near the opening 15, there is a hole slightly larger than the width of the second lid 3211 of the sliding lid 30. 36 is provided. The sliding lid 30 has a width larger than the width of the hole 36.
The end surface 36 of the third lid portion 33 is provided with a compression spring 37 disposed to bias the sliding lid 30 in the direction of the opening 16.
is pressed, and the sliding lid 30 is pressed against the third lid part 33.
Movement of the sliding lid 30 in the direction of the opening 16 is restricted by an end surface 38 of the sliding lid 30 . By the way, when using the cassette, as shown in FIGS. The sliding lid 30 is moved in the direction VC through the cutout hole 40.41 formed in the end surface of the rotating lid 16, and presses one end surface of the sliding lid 30, while the sliding lid 30 is attached to the compression spring 37. A tape pull-out member (not shown) for pulling out the tape 7 to the outside of the cassette by moving it backward against the force is inserted into the space region 42 behind the tape 7, and a suitable lid pushing means (not shown) is inserted into the space area 42 behind the tape 7. The tape 7 can be pulled out by rotating the rotary lid 16 using the lever 1). Conversely, when the cassette is no longer used, the tape pull-out member (not shown) is removed from the space area 42 to the outside of the cassette, and the lid lifting means (not shown) is lowered to open the rotating lid. 16
rotates so as to cover the front surface of the tape 7, resulting in a state as shown in FIG. Therefore, when using a cassette, tape 7
is surrounded by the rotating lid 16 and the sliding lid 3Q, and only a small portion of the sliding lid 30 is inside the cassette with the wound tape.
No human hands touch the tape 7, and no dust or the like adheres to it. Moreover, even if the tape 7 in the notch is slightly slack when changing from the cassette usage state to the cassette loading usage state, the rotating lid 16 and the sliding lid 30 will not catch the tape 7 and damage the tape 7. . Furthermore, the sliding lid 30 can be a flat plate with a size equal to the width of the notch VA2''r of the cassette and the recess 4, and resin molding is easy and leads to cost reduction.Moreover, the lower half of the cassette is smooth with no protrusions. Since the cassette can be configured to have a flat surface, the shape of the page holder used to mount the cassette in, for example, a recording/reproducing device can be simplified, allowing smooth mounting.

Effects of the Invention As described above, the tape cassette of the present invention does not insert and twist the tape when storing the tape in the cassette after being pulled out. When the sliding lid is closed, it is possible to protect the tape from dust adhering to it or touching it with human hands, and since the sliding lid does not enter the inside of the cassette and slides on the external surface, the sliding lid is There is no need to provide a cut-out hole to insert the cassette into the cassette, and dust can be prevented from entering through the cut-out hole.Furthermore, the sliding lid can be made of resin because it is a flat plate with a size approximately equal to the width of the cassette cut-out. Since it is easy to use, most of the parts including the sliding lid can be made of resin molded products, which reduces the cost.Furthermore, the lower half of the cassette can be constructed with a smooth surface without any protrusions, so it can be used, for example, in recording and reproducing devices. The shape of the holder for installing the cassette has been simplified and has 14 veggies.

[Brief explanation of the drawing]

1(a) and 1(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. 4 and 6 are cross-sectional views taken along the line X-Y of FIG. 2 in the closed and open states, respectively. FIG. 7
The figure is a partial sectional view taken along the line m-n in FIG. 6. 6... Tape cassette, 7... Tape, 8, 9... Tape reel, 10...
Upper flat plate, 11... Upper flat plate, 15... Opening, 16... Rotating lid, 28... First
surface, 29...second surface, 30...sliding lid. Name of agent: Patent attorney Toshio Nakao Haga 1st person
1 Ward (α) (b) 2 (2) 3 Figure

Claims (1)

[Claims] 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 chip reel, the tape cassette having an opening formed on the - side and a notch continuous with the opening formed on the upper flat plate. 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, and the upper flat plate has a first opening parallel to the upper flat plate. and a second surface including the notch and near the opening, parallel to the first surface and close to the upper flat plate,
The tape cassette is characterized in that the sliding lid slides within a plane sandwiched between the first surface and the second surface.