JPH05282829A - Magnetic-tape cassette unit - Google Patents

Abstract

(57) [Abstract] [Purpose] The take-up reel side of the pair of reels around which the wrapping tape is wound is rotated only in one direction of the tape take-up direction, and the lapping effect of polishing the VTR head is always constant. Try to keep [Structure] A supply reel 4 for winding a wrapping tape 3 and a take-up reel 5 are rotatably housed in a cassette housing 2. A pair of reel lock members 1 are provided on both front sides of the lower half 2b of the cassette housing 2 via a pair of support shafts 11, 11.
2 and 13 are rotatably supported. The corner portion of the other end 13b side of the reel lock member 13 on the take-up reel 5 side is cut so that the lock release member 10 on the take-up reel 5 side of the lid body 8 does not interfere. As a result, when the lid 8 is opened, the take-up reel 5 can rotate only in one direction of the winding direction of the wrapping tape 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-way take-up tape containing, for example, a lapping tape for cleaning or cleaning the head of a video tape recorder (VTR) and a cleaning tape. Regarding cassettes.

[0002]

2. Description of the Related Art For example, a tape cassette for recording and reproducing used in a VTR is known. This will be described in detail with reference to FIGS. 6 and 7. Reference numeral 1 is a so-called β (beta) type tape cassette, and its cassette housing 2 is composed of synthetic resin upper and lower halves 2a and 2b. There is.
In the cassette housing 2, a pair of supply and winding reels 4 and 5 on which a magnetic tape 3'is wound are rotatably accommodated. Tooth portions 4a and 5a are formed on the outer peripheral portions of the disk-shaped lower flanges of the pair of reels 4 and 5, respectively. In addition, the front surface of the cassette housing 2 is covered with the two sets of left and right tape guides 6 and 7 so as to cover and protect the magnetic tape 3'mounted along the front opening 2c. The lid 8 is attached via a pair of support shafts 9 and 9 so as to be openable and closable.

A pair of left and right reel lock members 12, 13, which are substantially L-shaped in plan view, are rotatably supported on both front sides of the lower half 2b of the cassette housing 2 via a pair of support shafts 11, 11. I am doing it. The pair of reel lock members 12 and 13
On one end 12a, 13a side of each of the reels 4 by the pair of torsion coil springs (elastic members) 14, 15 'interposed between the pair of support shafts 11, 11 and the pair of reel lock members 12, 13. , 5 each tooth portion 4a of the lower flange,
5a is engaged. As a result, the pair of reels 4,
5 is in a locked state, and the rotation of the pair of reels 4 and 5 in the tape feeding direction is restricted respectively, so that the lid 8
When closed, the magnetic tape 3'is prevented from being pulled out from the front opening 2c of the cassette housing 2.

A base portion 17a of a lid lock member 17 is rotatably supported on a side wall 2d of the lower half 2b of the cassette housing 2 on the side of the supply reel 4 via a mounting shaft 16.
The L-shaped claw portion 17b of the lid lock member 17 has a side wall 2d.
Through and engages with the lock hole 8a of the lid 8. In this lid lock member 17, the claw portion 17b of the lid lock member 17 is covered by the torsion coil spring 14 on the supply reel 4 side.
Is urged so as to be inserted into and engaged with the lock hole 8a (locking the lid 8 in the closed state). When the claw portion 17b of the lid lock member 17 is pressed into the cassette housing 2 against the biasing force of the torsion coil spring 14, the lid 8 is unlocked and the lid 8 is opened. .. When the lid body 8 is opened, the pair of support shafts 9 and 9 of the lid body 8 are paired with the pair of lock release members 10 and 10 which are L-shaped together with the respective support shafts 9 so that the pair of lock release members 10 and Reel lock member 1
The other ends 12a and 1 of the reel lock members 12 and 13 are pressed by pressing the other ends 12b and 13b of the vertical rectangular pieces 2 and 13, respectively.
3a and the tooth portions 4a, 5a of the pair of reels 4, 5 are unlocked.

When the tape cassette 1 is mounted in the cassette mounting position of the VTR (neither is shown), the lid 8 is opened, the locked state of the pair of reels 4 and 5 is released, and the cassette housing is opened. Front opening 2 of body 2
The tape is loaded by a loading means (not shown) inserted inside the magnetic tape 3'of a. As a result, recording / reproducing is performed on the magnetic tape 3'through the VTR head. When the head of the VTR is polished or cleaned, a wrapping tape or a cleaning tape (not shown) is wound around the pair of reels 4 and 5 instead of the magnetic tape 3 ', and the β type tape cassette 1 is used. Is being developed.

[0006]

However, in the conventional tape cassette 1, since the tape loaded by the supply reel 4 is wound up when the cassette housing 2 is ejected, it takes a short time (10 seconds or less). When only running, the tape is always in the full top state, and particularly in the tape cassette 1 using the wrapping tape or the cleaning tape, only the same portion of the tape is used repeatedly, so that the effect is reduced. There was a drawback.

Therefore, the present invention provides a tape cassette for one-way take-up, which is suitable when a tape such as a wrapping tape is used.

[0008]

A pair of supply and winding reels around which a tape is wound are rotatably accommodated in a cassette housing, and each reel is biased by each elastic member. When one end side of a pair of reel lock members for restricting the rotation in the tape feeding direction is locked and each locked state of the pair of reel lock members is opened / closed when opening / closing the front opening of the cassette housing, In a β-type tape cassette in which a pair of lock release members provided on the lid body release the pair of reel lock members by pressing the other ends of the reel lock members against the biasing forces of the elastic members. The other end of the reel lock member on the take-up reel side is notched so that the lock release member on the take-up reel side of the lid does not come into contact.

Further, a pair of supply and take-up reels around which a tape is wound are rotatably accommodated in a cassette housing, and the pair of reels are biased by respective elastic members to cause a tape feeding direction of each reel. To lock the one end side of the pair of reel lock members, and one end side of the release member abuts the other end side of the pair of reel lock members to lock each of the pair of reel lock members. When the cassette housing is mounted on the recording / reproducing device side, the lock releasing member on the device side releases the other end side of the release member against the biasing force of each elastic member. In a so-called VHS type or 8 mm type tape cassette, the other end side of the reel lock member on the take-up reel side is notched so that one end side of the release member does not abut.

[0010]

In the β type tape cassette, since the other end of the reel lock member on the take-up reel side is notched so that the lock release member on the take-up reel side of the lid does not come into contact, the reel lock member is used. The rotation of the take-up reel in the tape feeding direction is always regulated, and the take-up reel rotates only in one direction of the tape take-up direction.

Further, in the tape cassette of the VHS system or the like, since the other end side of the reel lock member on the take-up reel side is notched so that one end side of the release member does not come into contact with the reel lock member, the reel lock member prevents the take-up reel from rotating. The rotation in the tape feeding direction is always regulated, and the take-up reel rotates only in one direction of the tape winding direction.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. The same parts as those of the conventional structure are designated by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, reference numeral 1 is a β type tape cassette of the first embodiment, and the cassette housing 2 is composed of upper and lower halves 2a and 2b.
The supply reel 4 and the take-up reel 5 are rotatably accommodated therein, and the lid 8 for opening and closing the front opening 2a of the cassette housing 2 can be opened and closed via a pair of support shafts 9 and 9. The point of attachment is that a pair of reel lock members 12 and 13 are rotatably supported on both sides of the lower half 2b of the cassette housing 2 on the front side through a pair of support shafts 11 and 11; One end 12a, 1 of each reel lock member 12, 13
3a and the tooth portions 4a, 5a of the pair of reels 4, 5 are engaged (locked) with each other, the rotation of the reels 4, 5 in the tape feeding direction is restricted, and the pair of reel lock members 12, 13 is biased by a pair of torsion coil springs (elastic members) 14 and 15 in a direction to lock the pair of reels 4 and 5, and a side wall 2d on the supply reel 4 side on the lower half 2b of the cassette housing 2 described above. Lid lock member 17
Is rotatably supported via the mounting shaft 16,
It is similar to the conventional configuration.

Here, a lapping tape 3 for polishing a VTR head is wound around a pair of reels 4 and 5 as a tape. Further, as shown in FIG. 2, the other end 13b side of the reel lock member 13 on the take-up reel 5 side is protected by the corner so that the lock releasing member 10 on the take-up reel 5 side of the lid body 8 does not come into contact with the other end. The portion is cut out (this cutout is indicated by reference numeral 13c). Thereby, when the lid body 8 is opened, a pair of pin-shaped unlocking members 1 that are L-shaped with the respective support shafts 9 are provided below the tips of the pair of support shafts 9, 9 of the lid body 8.
The lock release members 10 on the side of the supply reels 0 and 10 press the other end 12b of the reel lock member 12 on the side of the supply reel 4 in the form of a vertical rectangular piece and one end 12a of the reel lock member 12 and the teeth of the supply reel 4. The lock state of the portion 4a is released, and the other end 13b of the reel lock member 13 on the take-up reel 5 side, which is a vertical rectangular piece, is not pressed by the lock release member 10 on the take-up reel 5 side. One end 13a of the reel lock member 13 and the take-up reel 5
The toothed portion 5a is kept locked.

Further, as shown in FIGS. 3A and 3B, the torsion coil spring 14 on the supply reel 4 side is the torsion coil spring 15 for urging the reel lock member 13 on the take-up reel 5 side. Stronger than (having elastic force)
Is formed. As a result, the take-up reel 5 is adapted to rotate only in one direction (FWD direction) of the tape take-up direction shown by the arrow in FIG. 1 even in the locked state.

According to the tape cassette 1 of the first embodiment, when the tape cassette 1 is mounted at the cassette mounting position of the VTR, the lid 8 is opened and at the same time, the lock releasing member of the lid 8 on the side of the supply reel 4 is opened. The other end 12b of the reel lock member 12 on the side of the supply reel 4 in the form of a vertical rectangular piece is pressed by 10. As a result, one end 12a of the reel lock member 12 on the supply reel 4 side and the tooth portion 4a of the supply reel 4 are provided.
Is unlocked. Further, the other end 13b of the reel lock member 13 on the take-up reel 5 side in the form of a vertical rectangular piece is
Since the interference portion of the lid 8 on which the lock release member 10 on the take-up reel 5 side abuts is cut into a triangular shape, one end 13a of the reel lock member 13 and the tooth portion 5a of the take-up reel 5 are formed.
And are kept locked, and the take-up reel 5 can rotate only in one direction of winding the wrapping tape 3. When the take-up reel 5 rotates in the tape take-up direction, one end 13a of the reel lock member 13 on the take-up reel 5 side passes over the tooth portion 5a of the take-up reel 5 to generate some sound, and A load is applied to the take-up reel 5 by the torsion coil spring 15 on the take-up reel 5 side, but since the torsion coil spring 15 is weaker than the torsion coil spring 14 on the supply reel 4 side, the load can be reduced. The rotation of the take-up reel 5 in one direction of the tape take-up direction is not hindered.

The front opening 2a of the cassette housing 2
When the wrapping tape 3 is tape-loaded on the head side of the VTR by a loading means (not shown) inserted inside the wrapping tape 3, the head of the VTR is polished by the wrapping tape 3. Since the take-up reel 5 can always rotate the wrapping tape 3 only in the take-up direction, a new portion of the wrapping tape 3 can always be used, and the head polishing effect can always be kept constant.

FIG. 4 shows a tape cassette 1'of the second embodiment. This tape cassette 1'is of the VHS type, and a cassette reel 2'has a supply reel 4 and a take-up reel 5 on which a wrapping tape 3 is wound, which are rotatably accommodated. A pair of reel lock members 12 and 13 are rotatably supported at the center of the rear half of the lower half 2b of the cassette housing 2'via a pair of support shafts 11 and 11. The one ends 12a and 13a of the pair of reel lock members 12 and 13 are provided with the tooth portions 4 of the pair of reels 4 and 5, respectively.
The rotation of the pair of reels 4 and 5 in the tape feeding direction is restricted by engaging (locking) a and 5a. This locked state is biased by a pair of torsion coil springs (elastic members) 14 and 15. Further, a substantially L-shaped release member 18 is supported in the central concave portion 2e of the lower half 2b so as to be vertically swingable like a so-called seesaw. One end 18a of the release member 18 has the reel lock member 1
It is in contact with the other columnar end 12b of the second column 2. Also, the other end 13b side of the reel lock member 13 on the take-up reel 5 side is notched at its corner portion so as not to contact the one end 18a of the release member 18 (this notch portion is shown in FIGS. Medium 13c).

When the tape cassette 1'having the above structure is mounted in the cassette mounting position of the VTR 20, the VTR
The unlocking member 21 on the 20 side penetrates the lower half 2b and resists the biasing force of the torsion coil spring 14 to release the release member 18.
When the other end 18b of the release member 1 is pressed upward, the release member 1
One end 18a of the reel lock member 1 on the supply reel 4 side
The other end 12b of the reel 2 is pressed to release the locked state of the one end 12a of the reel lock member 12 and the tooth portion 4a of the supply reel 4, and the reel lock member 13 on the take-up reel 5 side.
The other end 13b of the reel lock member 13 without being pressed by the one end 18a of the release member 18.
And the locked state of the tooth portion 5a of the take-up reel 5 is maintained,
The same action and effect as those of the first embodiment are obtained. Since other configurations are the same as those in the first embodiment, the same reference numerals as those in the first embodiment are attached and detailed description will be omitted.

Although the tape cassette using the wrapping tape as the tape has been described in each of the above-mentioned embodiments, it may be applied to the tape cassette using the cleaning tape for cleaning the head of the VTR. Also, β
Although the tape cassettes for the VHS system and the VHS system have been described, it goes without saying that the second embodiment can be applied to an 8 mm tape cassette for a so-called 8 mm video tape recorder.

[0021]

As described above, according to the tape cassette of the present invention, the other end of the reel lock member on the take-up reel side is brought into contact with the lock release member on the take-up reel side of the lid. Since the notch is formed so as not to contact, the rotation of the take-up reel in the tape feeding direction can be always regulated by the reel lock member, and the take-up reel can be rotated only in one direction of the take-up direction. ..

According to the tape cassette of the present invention, the reel lock member on the take-up reel side is notched so that one end side of the release member does not come into contact with the other end side of the reel lock member. Thus, the rotation of the take-up reel in the tape feeding direction can be constantly regulated, and the take-up reel can be rotated only in one direction of the take-up direction.

When a wrapping tape or the like is used as the tape of the tape cassette according to the first and second aspects of the present invention, a new portion of the tape can always be used, and the effect of wrapping or the like can always be kept constant.

[Brief description of drawings]

FIG. 1 is a plan view of the entire β system tape cassette according to a first embodiment of the present invention, except for an upper half of the tape cassette.

FIG. 2 is an explanatory diagram of a main part of the tape cassette.

3A is an explanatory view of a brake spring used on the supply reel side of the tape cassette, and FIG. 3B is an explanatory view of a brake spring used on the take-up reel side of the tape cassette.

FIG. 4 is a plan view of an entire upper half of a VHS type tape cassette according to a second embodiment of the present invention with a part thereof cut away.

FIG. 5 is a perspective view of a main part of the VHS tape cassette.

FIG. 6 is a plan view of the entire conventional β-type tape cassette with almost no upper half.

FIG. 7 is an explanatory diagram of a main part of the conventional tape cassette.

[Explanation of symbols]

 1, 1 '... Tape cassette 2, 2' ... Cassette housing 2c ... Front opening 3 ... Tape 4 ... Supply reel 5 ... Take-up reel 8 ... Lid 10, 10 ... Pair of lock release members 12 ... Reel lock member (Supply reel side) 12a ... One end 12b ... Other end 13 ... Reel lock member (winding reel side) 13a ... One end 13b ... Other end 13c ... Notch portion 14, 15 ... Torsion coil spring (elastic member) 18 ... Release member 18a ... One end 18b ... Other end 20 ... VTR (recording / reproducing device) 21 ... Lock release member

Claims (2)

[Claims] 1. A pair of supply and take-up reels around which a tape is wound are rotatably housed in a cassette housing, and the pair of reels are biased by respective elastic members so that the reels can be fed out in a tape feeding direction. The pair of reel lock members for restricting the rotation of the reel lock members are locked at their respective one ends, and the respective lock states of the pair of reel lock members are locked by the lid members at the time of opening operation of the lid opening and closing the front opening of the cassette housing. In a tape cassette in which a pair of lock release members provided is configured to press and release the other end sides of the pair of reel lock members against the urging force of the elastic members, A tape cassette, characterized in that the other end of the reel lock member is notched so that the lock release member on the take-up reel side of the lid does not come into contact. 2. A pair of supply and take-up reels around which a tape is wound are rotatably housed in a cassette housing, and the pair of reels are biased by respective elastic members so that the reels can be fed out in the tape feeding direction. To lock the one end side of the pair of reel lock members, and one end side of the release member abuts the other end side of the pair of reel lock members to lock each of the pair of reel lock members. When the cassette housing is mounted on the recording / reproducing device side, the lock releasing member on the device side releases the other end side of the release member against the biasing force of each elastic member. In the tape cassette, the other end of the reel lock member on the take-up reel side is notched so that one end side of the release member does not abut.