JPH0413767Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is directed to a head cleaner that cleans a magnetic head while a cleaning tape is pulled out in front of a cartridge case.

[Conventional technology]

As a related technique for preventing the cleaning tape from loosening when not in use, the reel brake means employed in genuine magnetic tape cartridges is generally well known.

[Problem that the invention attempts to solve]

However, even if the above-mentioned reel brake means is applied as is to the head cleaner, the cleaning tape still tends to loosen significantly at the front of the case. This is largely due to the difference in material between the cleaning tape and the magnetic tape.

In other words, in addition to the basic functions common to each manufacturer, decks may have additional functions unique to the manufacturer. For example, there is a device that applies a brake to the take-up reel during an eject operation to operate only the pay-out reel in the tape winding direction, thereby tightening the winding to prevent the tape from loosening in the magnetic tape cartridge when not in use.

When a head cleaner is applied to a deck of this type, there is no problem while the head cleaner is loaded on the deck, but when the drive shaft on the deck side comes off the payout reel before taking it out from the deck, it may cause damage to the reel. When the applied tightening force is released, the tension acting on the cleaning tape causes the payout reel to rotate in the loosening direction, causing the tape to loosen. Even when the deck side is not equipped with the above-mentioned additional functions, this kind of tape slack will occur to a greater or lesser extent.

The background to this is that deerskin and artificial leather are generally used as cleaning tapes, and although such materials have elasticity, their elastic modulus is relatively small. Therefore, when the cleaning tape is wound tightly around the feed reel, that is, when tension is applied, it stretches elastically, and this elongation attempts to restore itself when the tightening force is released, causing the feed reel to rotate in the feeding direction. It is from. As a result, the cleaning tape would loosen significantly toward the front of the case, resulting in a tape loading failure the next time it was used. When the cartridge case is equipped with a front cover to protect the tape, the cleaning tape gets caught in the front cover at the front of the case, preventing the front cover from closing and operating, making it impossible to remove the head cleaner from the deck. It was also the cause of serious trouble. In addition, the cleaning tape is wrinkled due to contact interference with the front lid, which reduces the cleaning effect.

This invention focuses on this fact and aims to reliably prevent the cleaning tape from coming loose in the front of the case, while having an extremely simple structure.

[Means for solving problems]

As described above, when taking out the head cleaner from the deck, it is impossible to reliably prevent the feeding reel from rotating in the tape feeding direction due to the tension of the cleaning tape.

Therefore, in the present invention, even when the feed reel returns and rotates in the tape feeding direction, tape slack occurs inside the case, thereby preventing tape slack from appearing on the front surface of the case.

More specifically, as shown in FIG. 1, a tape pressing and holding member 22 is provided which is in direct elastic contact with the tape winding surface of the feed reel 3 around which the cleaning tape 2 is wound. This tape pressing holding member 2
2 is adapted to press a location on the tape winding surface of the feed reel 3 in the vicinity of the traveling base point P where the cleaning tape 2 begins to separate from the tape winding surface.

[Effect]

In such a case, when taking out the head cleaner from the deck, the tension applied to the cleaning tape 2 causes the feed reel 3 to press against the tape pressing and holding member 2.
Suppose that it rotates in the loosening direction against the pressing force of 2.
This rotation cannot be completely stopped. At this time, the cleaning tape 2 wound on the feed reel 3 is certainly drawn out from the running starting point P toward the tape draw-out port 12 side until the tension applied thereto becomes less than a certain value, and
It also rotates accordingly. However, tape slack is caused by the tape pressing and holding member 2 against the feeding reel 3.
The tape 2 only comes out on the rear side from the pressing part of the tape 2, but the tape 2 does not loosen to the extent that the tape becomes slack on the front side of the case.

[Effect of idea]

According to the present invention, the tape pressing and holding member 22 is brought into direct elastic contact with a location on the tape winding surface of the feed reel 3 in the vicinity of the traveling base point P where the cleaning tape 2 begins to separate from the tape winding surface. Therefore, when the cleaning tape 2 is completely wound around the feed reel 3, even if the reel 3 rotates in the tape loosening direction,
The tape 2 only slackens on the rear side of the running base point P on the reel 3, and does not slacken on the front side of the case. Therefore, the next time it is used, it may cause tape loading failure, damage the tape 2, or even damage the front cover 25.
Even in the case where the cleaning tape 2 comes into contact with the front lid 25, there is no possibility that the head cleaner cannot be removed from the deck. No wrinkles remain on the cleaning tape 2 due to contact interference with the front lid 25.

〔Example〕

1 to 4 show a first embodiment of the present invention, in which a head cleaner adapted to a VHS video deck is illustrated.

In FIG. 1, reference numeral 1 denotes a cartridge case, inside of which there is a feed reel 3 and a take-up reel 4 on which the cleaning tape 2 is wound.
and a drive mechanism 5 that rotationally drives the take-up reel 4.
It is equipped with

The cartridge case 1 is formed to have an external shape similar to that of a real magnetic tape cartridge. For example, there are tape loading pockets 6 and 7 on the front of the case, and pocket 8 for capstan C.
is recessed. Although not shown, positioning holes, brake release holes, etc. corresponding to the members on the tape deck side are also provided as prescribed. Reference numeral 9 denotes a lamp hole, and an optical path R for tape end detection is set on a line connecting this lamp hole to a lamp window 10 opened in the right side wall of the cartridge case 1. S is a sensor for detecting the end of the tape provided on the tape deck. However, when using a manual method, these tape end detection means are not required.

The cleaning tape 2 is made of deerskin or artificial leather, and the cleaning tape 2 is made of deerskin or artificial leather.
and a take-up reel 4 via transparent lead tapes.

However, in the figure, the lead tape 2a connected to the take-up reel 4 side and the cleaning tape body are connected via a stopper 11. In order to reduce the amount of tape pulled out during tape loading, the tape running path at the front of the case is set to cross only the central pocket 7. To this end, tape draw-out openings 12 and 13 are provided on both sides of the pocket 7, and dedicated tape guides 14 and 15 are respectively provided. An auxiliary tape guide 14a is separately provided near the tape guide 14 on the left side, and the stopper 11 cannot pass between both tape guides 14, 14a, and the lead tape connected to the take-up reel 4 at this tape pull-out limit. It is set so that there is slack in 2a.

In FIG. 2, the feed reel 3 is rotatably supported on a drive shaft insertion hole 16 on the right side that is transparently provided in the bottom wall of the cartridge case 1. 3b and a pair of upper and lower flanges 3c, 3c, etc., and takes substantially the same form as that of a real magnetic tape cartridge. In order to reduce the curl of the cleaning tape 2, the diameter of the hub 3b is set large.

The take-up reel 4 is arranged between the lamp holes 9 formed in the bottom wall of the case and the drive shaft insertion hole 16 on the left side. This take-up reel 4 is rotatably supported on the cartridge case 1, and is rotationally driven by the rotational power of a capstan C via a drive mechanism 5. To briefly explain the principle structure of this drive mechanism 5, a pair of pulleys 1
7a, 17b, a belt 18 that is applied to both pulleys, an input roller 19 that transmits the power of the capstan C to the driving pulley 17a, a set of gears 20 that transmits the power of the driven pulley 17b to the take-up reel 4, and the like. This gear 20 can move toward and away from the take-up reel 4.

In FIGS. 1 and 3, a tape pressing and holding member 22 is provided inside the cartridge case 1 to prevent the tape from sagging. This is made of an elastic transparent plastic sheet, and its base end is supported and fixed in a cantilevered manner to a boss 23 provided at the front right corner of the cartridge case 1, and its free end is connected to the tape winding surface of the feed reel 3, i.e. hub 3b
The cleaning tape 2 is circumscribed on the right outermost surface of the cleaning tape 2 wound on the surface of the cleaning tape 2, and constantly presses and biases the tape 2 against the tape-wrapped surface with its own elastic force. The base end of the tape pressing and holding member 22 may be supported and fixed to the boss 23 by simply inserting it from above, or may be supported by pasting. The location where the tape pressing and holding member 22 presses the cleaning tape 2 against the tape winding surface of the feed reel 3 is as follows:
The most suitable location is near the running start point P where the outermost tape 2 begins to separate from the inner tape layer, but it may be located a little closer to the rear of the case than the running start point P as shown in the figure.

The cartridge case 1 is equipped with a front lid 25 that closes the front of the case when not in use.
There are two cleaning liquid supply ports 26 and 2 on the left and right sides of the
6 is transparent.

Further, the cartridge case 1 is provided with a reel brake means that engages the feed reel 3, and this reel brake means is connected to the brake piece 2.
7, and is rotatably biased by a spring member (not shown) so that this brake piece 27 always engages with engagement teeth 28 provided on the outer periphery of the lower flange 3c of the reel 3.

The deck-side members shown include a projection lamp 30, a pinch roller Q, a tape pull-out member L, a video magnetic head H, and an audio magnetic head h.
and so on.

In the head cleaner constructed as described above, the cleaning tape 2 is rewound on the feed reel 3 side, and the nozzle of the cleaning liquid filling cylinder is inserted through the two supply ports 26, 26, and the tape surface is After spraying the cleaning liquid on the container and impregnating it, load it onto the deck. When the playback button is turned on, the cleaning tape 2 is pulled out of the case from the tape pull-out opening 12 by the tape pull-out member L, as shown by the imaginary line in FIG. , h. At this time, the cleaning liquid-impregnated portion of the tape 2 circumscribes and wets each head H, h, thereby performing cleaning in a so-called wet state.

In this tape drawing state, the stopper 11 is received and supported by both the left tape guides 14, 14a, and the lead tape 2a is slackened by an allowance between the stopper 11 and the take-up reel 4. Therefore, even if the take-up reel 4 is immediately rotated in the take-up direction by the drive mechanism 5 in response to the rotational power of the capstan C, the cleaning liquid of the tape 2 remains until the lead tape 2a is taken up by the slack. The impregnated part is each head H,
h, and perform sufficient wet cleaning during this time. The lead tape 2a
When the tape is no longer loose, perform dry cleaning on the dry part of the tape that has no cleaning fluid attached. In other words, after wet wiping, you move on to dry wiping, which improves the cleaning performance.

When the lead tape on the feed reel 3 side crosses the optical path R for tape end detection, the light from the lamp 30 passes through the tape pressing and holding member 22 and reaches the sensor S.
The capstan C stops driving.

Next, the tape pull-out member L moves back into the pocket 7, and the pinch roller Q and capstan C
escapes from Pocket 8. The gear 20 is now removed from the take-up reel 4, and the reel 4 is in a free rotation state. In this state, as shown in FIG. 4a, the feed reel 3 is driven to rotate in the tape winding direction, and the cleaning tape 2 that has been drawn out of the case is run in the direction of the arrow and rewound.
At this time, the tape 2 wound on the take-up reel 4 side is also rewound at the same time.

In the case of a deck specially equipped with a winding tightening function, a force in the winding direction is further applied to the feed reel 3, and tension is applied to the cleaning tape 2 between the reels 3 and 4. More specifically, tension is applied to the cleaning tape 2 between the stopper 11 and the feed reel 3, and the tape 2 is slightly stretched and deformed. This phenomenon is noticeable in decks equipped with a seaming function, but it also occurs in general decks. In any case, before the cartridge case 1 is ejected from the deck, when the tape tightening action on the feed reel 3 is released, the tape tension causes the feed reel 3 to move as shown in the arrow in FIG. 4b. Rotate in the slack direction shown by . However, since the outer surface of the cleaning tape 2 wound around the hub 3b is constantly pressed by the tape pressing and holding member 22, even when the reel 3 rotates, the tape 2 is not pulled out to the front of the case by the amount that relieves the tension. However, the tape does not loosen toward the front of the case, but only loosens toward the inside (rearward) side of the pressing portion of the tape pressing and holding member 22, as shown in FIGS. 3 and 4b. At this time, if the tape pressing and holding member 22 of the present invention were not present, the tape 2 would come loose toward the front of the case as shown by the broken line in FIG. 4B as in the conventional example due to the rotation of the feed reel 3.

In addition, even when removed from the deck,
The tape pressing and holding member 22 always presses and holds the cleaning tape 2 wound around the hub 3b. Therefore, the member 22 supplementarily prevents the feed reel 3 from idling and rolling when not in use, and as a result prevents the tape from loosening. Therefore,
If the mechanism is to be extremely simplified, it is possible to omit the brake means including the brake piece 27 described above.

FIG. 5 shows another embodiment of the present invention regarding the tape pressing and holding member 22, in which the tape pressing and holding member is formed by a torsion coil spring 22a and a round shaft-shaped pressing piece 22b fixed to one free end of the torsion coil spring 22a. 22. In this case, the cleaning tape 2 is pressed a little closer to the front of the case than the travel starting point P. In this way, the tape pressing and holding member 22 may be formed of several members.

The drive mechanism 5 other than the one described above is not necessarily required, and the take-up reel 4 may be driven directly by the reel drive shaft on the deck side, similarly to the pay-out reel 3. In that case, the take-up reel 4 will be located above the drive shaft insertion hole 16 on the left side in FIG. An empty reel may be mounted on the left drive shaft insertion hole 16, and the empty reel and the take-up reel 4 may be interlocked and connected via an idler.

Furthermore, the present invention is not limited to the so-called reel-to-reel type head cleaner, but can also be applied to a stop cleaning type head cleaner in which the cleaning tape 2 performs cleaning by circumscribing the magnetic head in a stopped state. can. The illustrated front cover 25 is also not essential.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a plan view showing the schematic structure of the head cleaner, FIG. 2 is a sectional view taken along the line A-A in FIG. FIG. 3 is a plan view of the main part showing the operating state of the tape pressing and holding member, and FIGS. 4a and 4b are both schematic plan views illustrating the state of use. FIG. 5 is a plan view of essential parts showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Cartridge case, 2...Cleaning tape, 3...Feeding reel, 4...Take-up reel, 22...Tape pressure holding member, P...
Starting point of the run.

Claims (1)

[Claims for Utility Model Registration] (1) A cartridge case 1 is provided with a cleaning tape 2 and a feeding reel 3 for winding up and storing the cleaning tape 2, and the cleaning tape 2 is a tape drawing member L.
In a head cleaner that is pulled out to the outside of the front side of the cartridge case 1 for cleaning, there is a feed reel 3 inside the cartridge case 1.
The tape pressing and holding member 22 is provided with a tape pressing and holding member 22 that comes into elastic contact with the tape winding surface of the feed reel 3, and the tape pressing and holding member 22 is positioned at a running reference point P where the cleaning tape 2 starts to separate from the tape winding surface on the tape winding surface of the feed reel 3. A head cleaner characterized in that it presses a location near the head cleaner. (2) The tape pressing and holding member 22 is made of an elastic plastic sheet, and its base end is supported in a cantilevered manner by a member inside the cartridge case 1, and its free end is elastically pressed against the tape winding surface of the feed reel 3. A head cleaner according to claim 1 of the attached utility model registration claim.