JPH06267231A - Tape cassette - Google Patents

Abstract

PURPOSE:To improve the tape traveling characteristic by providing a resilient member between an upper part and a lower part of a reel and a case main body part. CONSTITUTION:A coil spring 7a is disposed between a recessed groove 5a of an upper flange surface of a supply side reel 2a (or take-up side reel 2b) and a recessed groove 6a of an inner surface of an upper surface plate of an upper half 1a. Similarly, a coil spring 7b is disposed between a recessed groove 5b and a recessed groove 6b. By this method, since a buffer mechanism is constituted between the reel 2a (2b) and the upper half 1a and lower half 1b, even if a magnetic tape traveling speed is accelerated to cause rotational wobbling on the reel 2a (2b), this wobbling is absorbed by the buffer mechanism.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cassette used in a recording and / or reproducing apparatus.

[0002]

BACKGROUND OF THE INVENTION It is well known that a tape cassette has been used in a recording and / or reproducing apparatus (hereinafter simply referred to as a recording / reproducing apparatus) such as a video tape recorder. Incidentally, an outline of such a tape cassette,
Generally, a supply-side reel and a winding-side reel are provided in a case body formed by combining an upper half and a lower half made of plastic, and a supply-side reel or a winding-side reel and an upper half are arranged. A leaf spring is disposed between the reel and the reel on the predetermined path between the reel on the supply side and the reel on the winding side. It has a front cover that can be opened and closed for protection.

By the way, in this kind of tape cassette,
As the running speed of the magnetic tape becomes higher, the running property becomes lower, that is, the supply reel and the take-up reel start to rotate, which results in the poor running property of the magnetic tape and deteriorates the recording / reproducing characteristics. There is. Therefore, there is a limit in increasing the running speed of the magnetic tape for the purpose of improving the recording / reproducing characteristics.

Although a leaf spring is arranged between the supply reel or the take-up reel and the upper half to prevent rattling of the supply reel or the take-up reel.
External force such as vibration or shaking during truck transportation causes collision or rubbing between the supply side reel or the take-up side reel and the lower half to generate dust powder, which adheres to the magnetic tape and drops out. Is also the cause of.

In particular, when a magnetic tape such as a so-called metal tape or a vapor-deposited tape which is adopted for higher recording density is used, the dust particles are apt to corrode and dropout or the like particularly occurs. The recording / reproducing characteristics are likely to deteriorate.

[0006]

DISCLOSURE OF THE INVENTION A first object of the present invention is to provide a tape cassette having improved tape running characteristics. A second object of the present invention is to provide a tape cassette in which dropout due to the attachment of dust powder is unlikely to occur.

The above object of the present invention is to provide a case body, a reel around which the tape contained in the case body is wound, and an repellant provided between the upper and lower parts of the reel and the case body. And a tape cassette characterized by comprising a member. That is, an elastic member such as a coil spring is provided between the case body and the upper and lower parts of the supply reel or the take-up reel around which the magnetic tape stored in the case body is wound. , The running speed of the magnetic tape becomes high,
Even if the supply-side reel or the take-up reel is subject to rotational shake, this rotational shake is absorbed by the elastic member, the rotation of the supply-side reel or the take-up reel is stable, no fluctuation occurs, and the magnetic The tape has good running characteristics and excellent recording / reproducing characteristics.

Further, since an elastic member such as a coil spring is provided between the supply side reel or the take-up side reel and the upper half or the lower half, even if the tape cassette is transported by truck, That is, even if an external force such as vibration or shaking is applied, collision or rubbing does not occur between the supply side reel or the winding side reel and the upper half or the lower half, and no waste powder is generated,
The dust particles do not adhere to the magnetic tape, making dropout difficult to occur.

Particularly, when a magnetic tape such as a so-called metal tape or a vapor-deposited tape which is adopted for increasing the recording density is used, corrosion is likely to occur due to adhesion of dust powder. With this configuration, dust particles are less likely to be generated, and the dust particles do not adhere to the magnetic tape,
Dropouts are less likely to occur.

[0010]

1 to 3 show one embodiment of a tape cassette according to the present invention, FIG. 1 shows a lid closed state, and FIG. 2 shows a lid opened state. FIG. 3 is a cross-sectional view near the reel portion. The case body 1 constituting the tape cassette A is composed of, for example, a rectangular upper half 1a and a lower half 1b made of a synthetic resin such as polypropylene, polystyrene, and ABS resin, and these upper half 1a and lower half 1b. Are mutually fitted from above and below, and are screwed with a set screw to form an integral housing.

It should be noted that the mating surface of the upper half 1a and the lower half 1b is uneven or has a "" shape as shown in FIG. It has a structure that makes it difficult for dust and dirt to enter.
A pair of tape reels, that is, a supply-side reel 2a and a winding-side reel 2b are rotatably accommodated in the case body 1, and the magnetic tape 3 is placed between the supply-side reel 2a and the winding-side reel 2b. It is wound and stretched. Both tape reels 2a and 2b are placed on the bottom plate of the lower half 1b and are aligned with the reel disc insertion holes 4 provided in the bottom plate.

Then, as shown in FIG. 3, the supply-side reel 2
A ring-shaped concave groove 5a is formed on the upper flange surface of the winding reel 2a or the winding side reel 2b, and a ring-shaped concave groove 5a is formed on the inner surface of the top plate of the upper half 1a corresponding to the ring-shaped concave groove 5a. A groove 6a is formed, and a ring-shaped groove 5b is formed on the lower flange surface of the supply-side reel 2a and the winding-side reel 2b. A ring-shaped groove 6b is formed on the inner surface of the bottom plate of the half 1b, and a coil spring 7a is formed between the groove 5a on the upper flange surface and the groove 6a on the inner surface of the upper plate of the upper half 1a. And the coil spring 7b is also disposed between the concave groove 5b on the lower flange surface and the concave groove 6b on the inner surface of the bottom plate of the lower half 1b.
A buffer mechanism is formed between the reel 2b on the winding side and the upper half 1a and the lower half 1b.

Although the buffer mechanism has been described with the coil springs 7a and 7b in the above embodiment, it may be a leaf spring. On the front of the case body 1,
As shown in FIGS. 1 and 2, the front wall of the tape cassette A (the front wall of the upper half 1a and the front wall of the lower half 1b) 1
A front opening 8 is provided in a substantially central portion of c, and a bottom opening 9 continuous with the front opening 8 is formed in the bottom plate of the lower half 1b.
(A tape loading member on the recording / reproducing apparatus side enters a pocket formed by the front opening 8 and the bottom opening 9 to pull out the tape 3 from the tape cassette A).

Reference numeral 10 denotes a lid which can open and close a pocket formed by the front opening 8 and the bottom opening 9. The lid 10 is of a sliding type, and as shown in FIG. 2, the lid 10 is slid to the right. The magnetic tape 3 can be pulled out to the front of the case body 1 when the lid 10 is opened. Incidentally, the lid 10
Is a molded product made of a synthetic resin such as polypropylene, polystyrene, polyacetal, or ABS resin.

As shown in FIG. 1, the lid 10 can be closed by sliding it to the left. When the lid 10 is closed and the magnetic tape 3 is housed in the case body 1, the front opening 8 is formed. The magnetic tape 3 is completely shielded from the outside in the pocket portion formed by the bottom opening 9 and has a very high degree of sealing. The lid 10 may be attached to the case main body 1 by any mechanism, for example, a slide groove (not shown) on the case main body 1 side and a protrusion for locking the slide groove on the lid 10 side. There is a means of configuring a part (not shown).

In this embodiment, the case body 1
Since the bottom opening 9 is formed in the
The lid 10 is configured so as to be able to close the portion of. Further, although the slide-type lid 10 is arranged inside the front wall 1c of the tape cassette, it may be arranged outside the front wall 1c of the tape cassette.

Further, tape guides (not shown) are provided on both sides of the front opening 8 to prevent the magnetic tape 3 from being damaged by coming into contact with the front wall 1c when the magnetic tape 3 is pulled out (FIG. 2). It is configured. Also, the lid 10 and this lid 1
In the case body 1 to which 0 corresponds, a click / clock mechanism with unevenness is configured according to the opening / closing position.
The lid 10 can be opened and closed at each position.

Incidentally, the width of the front opening 8 which is opened and closed by the slide type lid 10 may be any width as long as the tape loading member on the recording / reproducing apparatus side can enter and pull out the tape 3 from the tape cassette A. For example, it is not necessary to make the tape cassette large like the conventional tape cassette having a rotatable opening / closing type lid. Further, although not shown, in the case where the tape end detection mechanism is of a type that is detected when light is transmitted through the transparent tape part at the end of the tape 3, the tape cassette has a lamp insertion part. , An opening is formed in the wall of the lamp insertion part, but a transparent member is provided in the opening of the wall of the lamp insertion part so that the outside and the inside are shielded. Is preferred.

Further, the supply side reel 2a and the winding side reel 2b
A reel disk insertion hole 4 is formed on the bottom surface of the lower half 1b corresponding to the above, and a slider (not shown) is provided so that the reel disk insertion hole 4 can be closed when the tape cassette A is not used. You may be allowed to. Tape cassette A constructed as described above
The opening operation of the lid 10 that is closed to protect the magnetic tape 3 during recording and reproduction is along the front wall 1c of the case body 1 and does not rotate. Since the space for opening and closing the lid 10 is small, it is preferable when used in a recording / reproducing device, particularly in a device such as a video camera which is required to be downsized. That is, it is a tape cassette that can cope with further miniaturization of the recording / reproducing apparatus.

Further, since the tape cassette A accommodating the magnetic tape 3 is highly airtight, dust and dirt are less likely to enter, and the magnetic tape 3 is less likely to be stuck with dust, so that dropout is less likely to occur and recording / reproduction is performed. It has excellent characteristics. In particular, the width of the front opening 8 for pulling out the magnetic tape 3 may be any width that allows the tape loading member on the recording / reproducing apparatus side to enter and pull out the tape 3 from the tape cassette A. Since the tape cassette A does not have to be large like a tape cassette equipped with a lid, the tape cassette A has high airtightness, dust and dirt are less likely to enter, and the magnetic tape 3 is less likely to stick to dust and dropout. It is hard to get up and has excellent recording and playback characteristics.

The airtightness of the tape cassette A accommodating the magnetic tape 3 is high, and even if the magnetic tape 3 is of a type having poor corrosion resistance such as a metal tape or a vapor deposition tape,
It does not easily corrode and is highly safe. Furthermore, despite the high tightness of the tape cassette A,
Its construction is simple, and is much simpler than that of a tape cassette for 8 mm video in particular.

Further, the supply side reel 2a and the winding side reel 2b
A coil spring 7a is provided between the concave groove 5a on the upper flange surface and the concave groove 6a on the inner surface of the upper plate of the upper half 1a, and the lower flange surface of the supply side reel 2a or the winding side reel 2b. A coil spring 7b is also arranged between the concave groove 5b of the lower half 1b and the concave groove 6b of the inner surface of the bottom plate of the lower half 1b, and the supply side reel 2a or the winding side reel 2b and the upper half 1 are arranged.
Since the buffer mechanism is formed between the a and the lower half 1b, even if the running speed of the magnetic tape 3 becomes high and the supply-side reel 2a or the winding-side reel 2b tends to rotate, Rotational shake is absorbed by the coil springs 7a and 7b, the supply reel 2a and the take-up reel 2b rotate stably, no fluctuations occur, the magnetic tape 3 has good running characteristics, and the recording / reproducing characteristics are excellent. Are better.

Further, the supply side reel 2a and the winding side reel 2b
Since the coil springs 7a and 7b are provided between the upper half 1a and the lower half 1b, even when the tape cassette A is transported by truck, that is, even when an external force such as vibration or shaking is applied, No collision or rubbing occurs between the supply-side reel 2a or the winding-side reel 2b and the upper half 1a or the lower half 1b, no dust powder is generated, the dust powder does not adhere to the magnetic tape 3, and the dropout occurs. It is hard to get up.

In particular, when a magnetic tape such as a so-called metal tape or a vapor-deposited tape which is adopted for higher recording density is used, the dust particles are apt to cause corrosion, but With this configuration, dust particles are less likely to be generated, and the dust particles do not adhere to the magnetic tape,
Dropouts are less likely to occur.

[0025]

The tape cassette according to the present invention has a case body, a reel around which the tape contained in the case body is wound, and an ammunition provided between the upper and lower parts of the reel and the case body. Since it has a repellant member, even if the running speed of the tape becomes high and the rotation blur is about to occur on the reel, this rotation blur is absorbed by the elastic member, the rotation of the reel is stable, and fluctuations occur. , The tape has good running characteristics, excellent recording / reproducing characteristics, and
Since the elastic member is arranged between the reel and the case body, even if the tape cassette is transported by truck, that is, even if an external force such as vibration or shaking is applied, the reel and the case body are separated from each other. There is no collision or rubbing between them, no dust powder is generated, dust powder does not adhere to the tape, and dropout does not easily occur. In particular, so-called metal tape adopted for higher recording density When a tape such as a vapor deposition tape is used, corrosion of the dust particles is likely to occur due to the adhesion of the dust particles.However, with the above structure, the dust particles are less likely to be generated, and therefore the dust particles should not adhere to the tape. In addition, dropout does not easily occur, and the structure is simple.

[Brief description of drawings]

FIG. 1 is a perspective view of a tape cassette showing a closed state.

FIG. 2 is a perspective view of the tape cassette showing an opened state.

FIG. 3 is a sectional view of the vicinity of a reel portion.

[Explanation of symbols]

 A tape cassette 1 case body 1a upper half 1b lower half 2a supply side reel 2b winding side reel 3 magnetic tape 5a concave groove 5b concave groove 6a concave groove 6b concave groove 7a coil spring 7b coil spring

Claims (1)

[Claims] 1. A case main body, a reel around which a tape contained in the case main body is wound, and an elastic member provided between the upper and lower parts of the reel and the case main body. A tape cassette characterized by that.