JPH0323577A - Tape cassette - Google Patents

Abstract

PURPOSE:To prevent the occurrence of slack of a tape and the damage of the tape due to excessive tension by providing a guide means which changes the stretch position of the tape while keeping the length of the tape led out from a tape reel approximately constant. CONSTITUTION:A cassette enclosure 11 has an aperture part in the front and tape reels 12 and 13 are stored in the cassette enclosure 11, and tape guide posts 16 are so provided that a tape 14 led out from tape reels 12 and 13 is stretched on the outside of the front aperture part of the cassette enclosure 11, and these guide posts 16 are moved to extend distances from stretch positions of the led-out tape 14 to tape reels 12 and 13. When tape guide posts 16 are in positions close to tape reels 12 and 13, in position distant from them, and on paths of movement between these positions, guide means 24 change the stretch positions of the tape 14 while keeping the length of the tape 14, which is led out from tape reels 12 and 13, approximately constant. Thus, the occurrence of slack of the tape and the damage of the tape due to excessive tension are prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape cassette suitable for application to a magnetic recording/reproducing device.

Conventional Technology As is well known, so-called compact cassettes are used in conventional cassette-type video tape recorders, but in today's world where large amounts of information are required, smaller tapes are being used for storage and portability. A cassette is required. Therefore, a conventional small tape cassette of this type (for example, one constructed as shown in FIG. 5) is known.

The following is an explanation based on the drawings. Small J-B Cassette 1
It consists of a head 3 having a tape draw-out opening 2, and a storage main body 6 housing a supply reel 4 and a take-up reel 5.

The small tape cassette 1 has a smaller cassette cassette than a standard size tape cassette (hereinafter referred to as a standard cassette) applied to general magnetic recording and reproducing devices.

The operation of the small tape cassette constructed as described above will be explained.

First, when the small tape cassette 1 is loaded into the tape cassette loader Hel, which is a part of the magnetic recording and reproducing device, the head 3 slides from the storage main body 6, and the tape cassette, which is smaller than the standard cassette, is placed in the tape cassette mounting position. is pulled out to the standard cassette's deep extended position. In order to wind and service a magnetic tape around a rotating cylinder equipped with a magnetic head, a tape opening post is inserted between the cassette case and the magnetic tape at the tape tensioning position of a standard cassette. This is because it is necessary to pull out the magnetic tape from the housing.

Problem 7 that Masaaki is trying to solve - When the book cassette is not installed in the tape cassette loading device, the tape reel must be fixed so that the magnetic tape stretched between the tape reels does not become sagging or stretched. There is a locking mechanism for this purpose. However, in order to carry out the above-mentioned operation, unless the locking mechanism of the tape reel is removed in advance, excessive tension will be applied to the magnetic tape. On the other hand, if there is no lock IFIM 4 for fixing the tape reel wound with magnetic tape around the tape cassette, the tape may become slack when the tape cassette is carried, resulting in damage to the magnetic tape.

When taking out the small Moeki tape cassette from the rough tape cassette loader gH, it is necessary to rewind the pulled out magnetic tape onto the tape reel in order to prevent the magnetic tape from sagging.

However, with the conventional configuration, it is difficult to rewind the magnetic tape pulled out by the tape cassette itself. Therefore, the tape cassette gW& is required to have a structure that absorbs the slack of the magnetic tape, which causes the problem that the mechanism of the tape cassette device becomes complicated and the cost increases.

The present invention solves these problems, and does not cause the tape to slack or damage the tape by applying excessive tension, and does not require any special configuration for the tape cassette loading device. The object of the present invention is to provide a small-sized tape cassette as described above.

Means for Solving the Problem In order to solve this problem, Mitsuei has developed a cassette housing having an opening on the front surface for storing a tape reel, and a tape drawn out from the tape reel in the cassette housing. It has a configuration in which a tape guide post is provided outside the front opening to stretch the tape, and the tape guide post is moved to separate the stretched position of the drawn tape from the tape reel. The length of the tape pulled out from the marking tape reel is kept almost constant when the post is close to and away from the marking tape reel, or on the path that moves between the two points. The present invention is provided with a guide means for changing the stretching position of the tape pulled out from the tape reel while maintaining the tension.

Function: With this structure, the stretched position of the drawn tape can be moved away from or close to the tape reel without causing slack in the tape or damaging the tape due to excessive tension. A special structure for absorbing tape slack in the tape cassette mounting device is not required.

Examples Below, I7I is a fruit of the present invention! iI! ;AI will be explained based on the drawings.

1 to 4, a supply reel 12 and a take-up reel 13 are provided inside a cassette 1 and a housing 11. A front cover 15 is freely installed in the 11j tin of the cassette cassette 11 in order to cover the magnetic 7-114 which is rotatably supported at the illll part and wound around the reels 12 and 13. There is. In addition, on both sides of the inside of the cassette housing 11, magnetic data 14 is placed on both reels 12, 13.
A tape guide post 16 is provided on the outside of the front opening of the cassette housing 11 to extend the tape guide post 11, and is integrally formed with a support arm 17. The support arm 17, which is integrated with the tape guide post 16, can be rotated by engaging a support post 18 fixed inside the cassette housing 11 with an elongated hole 19 at the end thereof.

Further, ##fi15 is integrally provided with a rotational force transmission post 20 that transmits the rotational force of #M15 to the support arm 17. It is configured to transmit the signal to the support arm 17 marked with #. The transmission arm 21 is supported by the cassette housing 11 so as to be able to slide forward and backward by engaging with a support post 22. Further, the support arm 17
An elongated hole 23 is formed in which receives the transmission force of the transmission arm 21, and the tip of the transmission arm 21 is engaged with this elongated hole 23. Further, a guide groove 24 having a gentle curve is formed in the cassette body 11 in order to regulate the movement of the support arm 17 within a certain range, and the support arm 17 slides into this guide groove 24. freely engaged. Further, the #-marked cassette housing 11 is provided with a post 25 for keeping the length of the tape 14 drawn out from both the reels 12 and 13 constant. In FIG. 2, reference numeral 26 denotes a tape loading post provided on the side of the magnetic recording/reproducing apparatus.

Next, the tape pulling operation when the tape cassette of the above-mentioned II4 precepts is loaded into a tape cassette loading device (not shown) will be described in more detail.

As is well known, when recording video or audio signals on magnetic tape, the magnetic tape is generally wound around a rotating cylinder with a built-in magnetic head, and then the tape is inserted into a cassette housing using the tape opening post of a magnetic recording and reproducing device. You need to load from. Therefore, when the tape cassette, which was sealed by the front cover 15 before being installed, is loaded into the tape cassette loading device, the front 1115 rotates around the support shaft provided in the cassette housing 11, as shown in FIG. The magnetic tape 14 is exposed. At the same time, the rotational force of the front 115 is transmitted to the support arm 17 by the rotational force transmission post 20. Then, the tape guide post 16 integrally formed with the support arm 17 moves in the direction of being separated from the cassette housing 11. Now, when the tape guide post 16 moves in the direction away from the reel 12.13, the position of the reel 12.13 before and after the movement is different. The length of the magnetic tape 14 pulled out from the magnetic tape 13 is set to be constant. Here, support arm 1
If the magnetic tape 7 starts spinning with the support post 18 as the spindle, then the magnetic tape 14 pulled out from the reel 12 and 13 during the transition period of the movement of the tape guide post 16 drawing an arcuate trajectory will have Excessive tension is applied, causing damage to the magnetic tape 14. Alternatively, if the magnetic tape 14 is pulled out excessively during the transitional period of movement, a problem arises in that the magnetic tape is not completely loaded onto the magnetic recording Hlff. So reel 12.1
The moving path of the tape guide post 16 is set so that the length of the magnetic tape 14 pulled out from the tape guide post 3 is always constant. In other words, the tape guide post 16 also has 24 guides.
Reel 12. 1
The length of the magnetic tape 14 pulled out from the tape 3 does not change, but the tape guide post 16 moves as if along the magnetic tape 74. Here, Bost 25
Magnetic tape 1 pulled out from reel 12.13 by
The length of 4 is reel 12. Magnetic tape 1 wrapped around 13
4 is constant regardless of the winding diameter. Therefore, the reels 12 on the supply side and the take-up side. Magnetic tape 1 wrapped around 13
The above operation is performed smoothly regardless of the winding diameter of 4. The above operation acts on both tape guide posts 16, which enforces a symmetrical configuration, and moves the stretched magnetic tape 14 onto the reel 12. It becomes possible to pull it out in a direction away from 13. That is, in FIG. 2, the tape guide post 16, the support arm 17, and the magnetic tape 4 are pulled out to the positions indicated by the two-dot chain lines. The tape loading post 26 of the magnetic recording device is inserted between the rut air tape 14 pulled out in the J direction and the cassette housing 11, and by loading the magnetic tape T4, the magnetic head is mounted on the rotating cylinder. Dave 14 can be wrapped around it. During this series of operations, guide 1
24 is shaped so as to keep the length of the magnetic tape 14 stretched on the tape guide post 16 constant in the cassette housing 11, so that it does not apply excessive tension to the magnetic tape 14 or The magnetic tape 14 can be pulled out to a position where the tape loading post 26 can be inserted without causing any slack. The elongated hole 19.23 is provided so that the support arm 17 can move smoothly along the guide groove 24. That is, this is because the support arm 11 does not rotate completely around the support post 18. The above-mentioned operation is also shown in FIG. 3, where the tape guide post 16, which was located at the solid line in the figure before being installed in the tape cassette loading device, is shown by the chain double-dashed line when it is loaded in the tape cassette loading device. It will be pulled out to the position shown. Naturally, the magnetic tape 14 is also pulled out, and the pulled out magnetic tape 14 and the cassette housing 1
A tape loading boss 26 with eight magnetic recording and reproducing positions is inserted between the tape loading boss 26 and the tape loading boss 26 with 8 magnetic recording/reproducing positions.

As described above, according to the present invention, when the tape guide post is in a position close to the tape reel and in a position between WI, or on a path moving between these two points, By providing a guide means for changing the stretching position of the tape pulled out from the tape reel while keeping the length of the tape pulled out from the tape reel substantially constant, the tape can be prevented from sagging.
In addition, the stretched position of the drawn tape can be placed between #i or close to the tape reel without applying excessive tension and damaging the tape, and the tape cassette off device can prevent tape slack. No special configuration is required for absorption.

In addition, with conventional standard tape cassettes, the front cover that covers the j-b has a low degree of sealing. It was possible to touch one part with one's fingers. This is because a standard tape force set has a notch on the top surface of the cassette housing in order to insert the data blowing post of the magnetic recording/reproducing device between the reel and the tape pulled out from the reel. It is from. However, even in view of the recent improvement in tape recording density, it has become more airtight to protect the tape from all four aspects.
- A pouch set is required. Masaaki Moto's tape/cassette is a tape cassette device installed in 8 positions, and by changing the tape stretching position, space is created for the first time to insert the tape loading bosses 1 to 1 between the tape and the reel. That is, before loading the tape cassette into the tape cassette loading device, there is no need to provide a space for a deep loading post in the cassette casing, so there is no need to open the cassette cassette. So, I put drt if on the tape cassette.
By providing a lock vM structure or the like, it is possible to achieve an almost completely sealed state. Furthermore, as mentioned above, the tape cassette made by Masaaki Moto has a narrower distance between the reel and the front cassette than the conventional standard tape cassette before being loaded into the tape cassette loading device.

This allows the tape cassette itself to be more compact than the conventional standard tape cassette. As described above, under normal conditions, the tape cassette has a high degree of sealing, which reduces the possibility of dust accumulating on the tape or scratching or scratching the tape, which has great practical effects.

[Brief explanation of drawings]

4 Figures 1 to Z show one embodiment of the present invention.
The figure is an enlarged plan view of the main part of the tape cassette, Fig. 2 is an explanatory diagram of the operation, Fig. 3 is a side sectional view, Fig. 4 is a perspective view of the main part, and Fig. 5 is a plan view of the main part of the tape cassette.
The figure is a perspective view of a conventional small Dave cassette. 11... Cassette housing, 12... Supply reel, 13
...Take-up reel, 14...Magnetic tape, 15...
Front benefit, 16...A/guide post, 17...Support arm, 18...Support boss 1, 19...Elongated hole, 20
... Reversing force transmission support post, 21... Transfer arm,
22... Support post, 23... Elongated hole, 24... Guide groove, 25... Post, 26... Tape opening-fing post.

Claims (1)

[Claims] 1. A cassette housing having an opening on the front surface and storing a tape reel; a tape guide post provided to stretch the tape pulled out from the tape reel outside the front opening of the cassette housing; The tension position of the drawn tape is separated from the tape reel by moving a tape guide post, and the tape guide post is located close to the tape reel and is separated from the tape reel. guide means for changing the stretching position of the tape pulled out from the tape reel while keeping the length of the tape pulled out from the tape reel substantially constant even when the tape is at the tape reel or on a path moving between the two points; Equipped with a tape cassette.