JPH047010B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a head cleaner, particularly to a head cleaner applicable to a VHS video deck.

[Conventional technology]

Fig. 7 shows a conventional head cleaner in a tape loading state, and its appearance is the same as a VHS videotape cassette, and the main body case 1 is formed to have substantially the same shape and dimensions as the cassette case. A supply reel 3a and a take-up reel 3b on which the cleaning tape 2 is wound are rotatably housed inside. A tape feeding port 4 and a tape winding port 5 are provided at the left and right ends of the front side of the main body case 1, and pockets 6, 6 for tape loading are arranged horizontally and recessed between the tape feeding port 4 and the tape winding port 5. It is set up. A tape guide 4a is provided on one side of the tape feeding port 4 near the pocket 6, and a tape guide 5a is provided on one side of the tape winding port 5 near the pocket 6. The cleaning tape 2 is led out from the supply reel 3a to the front side of the case via the tape guide 4a of the tape outlet 4 in front of this, enters the case via the tape guide 5a of the tape winding opening 5, and is transferred to the take-up reel 3b. It is wound up.

When such a head cleaner is loaded into a video deck, the loading posts 7, 7 of the M-type loading mechanism on the deck side enter the inside of the cleaning tape 2 from the pockets 6, 6. Therefore,
When these loading posts 7, 7 are moved in parallel in the forward direction indicated by the dotted arrow A, the cleaning tape 2 becomes Ω-shaped and is attached to the head cylinder 8.
contact by wrapping around more than half the circumference of the Next, the pinch roller 9 on the deck side moves in the backward direction indicated by the dotted arrow B and presses the tarnishing tape 2 onto the capstan 10, and the cleaning tape 2 starts running to touch the head on the head cylinder 8 and erase the tape. Wipe off the dirt on the head 11. The impedance rollers 12 on both sides of the head cylinder 8 rotate as the cleaning tape 2 runs, allowing the cleaning tape 2 to travel stably.

On the video deck side, a tension post 13 is installed to apply an appropriate back tension to the magnetic tape. Therefore, immediately after this head cleaner is loaded into the video deck as described above and the loading described above is completed,
The tension post 13 moves forward as shown by the dotted arrow C and enters between the deck-side die rollers 14 and 14 on the outside of the cleaning tape 2, and the cleaning tape 2 becomes Ω-shaped and is attached to the tension post 13. The tape 2 is wrapped around and back tension is applied to the tape 2. The movement of the tension post 13 inward of the cleaning tape 2 is now carried out by the tension of a spring (not shown) that is constantly pulling the tension post 13 in the forward direction indicated by arrow C. There is.

[Problem that the invention seeks to solve]

However, the cleaning tape 2 is generally made of leather or cloth, and has greater frictional resistance with the guide roller 14 and tension post 13 than magnetic tape, and is also thicker. For this reason, as described above, when back tension is applied to the cleaning tape 2 by the operation of the tension post 13 as in the case of the magnetic tape M-type loading mechanism, an excessive running load is applied to the tape 2, resulting in a smooth and stable loading mechanism. Tape running cannot be obtained. Such problems are more likely to occur especially when the cleaning tape 2 is a wet type. The wet cleaning tape 2 uses a cleaning liquid to make it easier to wipe away dirt, but this cleaning liquid significantly increases the frictional resistance with the guide roller 14 and tension post 13, making it more likely to stick to the roller 14. .

This invention has been proposed to solve these problems, and aims to reduce the running load of the cleaning tape in the reel-to-reel type head cleaner described above, thereby ensuring smooth and stable running of the cleaning tape. With the goal.

[Means for solving problems]

In the present invention, the tension post 13 on the deck side
Tension regulating member 16 for regulating the operation of
Prepare the head cleaner. That is, the tension regulating member 16 is made of a material harder than the material of the cleaning tape 2, and is attached to the tape outlet 4 so as to follow the inside of the cleaning tape 2 that is led out from the tape outlet 4 of the main body case 1. Tension post 1 with tension regulating member 16
3 to prevent the cleaning tape 2 from wrapping around the post 13.

[Effect]

In the above configuration, when the head cleaner is loaded into the video deck and the cleaning tape 2 is loaded by the M loading mechanism, the tension post 13 on the deck side moves in the direction of arrow C shown by the dotted line in FIG. 1, but the tension regulating member 16 to catch the post 13 and remove the cleaning tape 2.
Since the cleaning tape 2 is prevented from being wrapped around the tension post 13, back tension is not applied to the cleaning tape 2 by the tension post 13, and the cleaning tape 2
The vehicle will run with less running load.

〔Effect of the invention〕

According to the present invention, the cleaning tape can be easily removed by simply disposing the tension regulating member 16 made of a material harder than the cleaning tape 2 in the tape outlet 4 of the main body case 1 so as to follow the inside of the cleaning tape 2. Even when using an inexpensive cloth (for example, about 0.09 mm thick) as the cleaning tape 2, the tension post 13 can prevent back tension from being applied to the cleaning tape 2, which reduces the running load on the cleaning tape 2. , the cleaning tape runs smoothly,
The tape 2 could run smoothly and stably, contributing to improved head cleaning performance.

〔Example〕

An embodiment of the head cleaner according to the present invention will be described below with reference to FIGS. 1 to 5.

Since the basic structure of the head cleaner is substantially the same as that of the conventional one described above, the same reference numerals will be given and the explanation thereof will be omitted, and the differences from the conventional tape running system will be mainly explained.

1 and 2, a vertical shaft 1 is located on one side of the main body case 1 near the pocket 6 of the tape outlet 4.
5 is provided, and a tension regulating portion image 1 is provided on this vertical axis 15.
Attach 6. In Figures 3 and 4,
The tension regulating member 16 is the cleaning tape 2
A post receiving surface portion 17 formed of a plastic molded product made of a material harder than the material of
A boss 18 provided on the proximal end side and passing through the vertical shaft 15
and a tape passing portion 19 provided on the tip side of the post receiving surface portion 17 and through which the cleaning tape 2 is passed. Thus, the tension regulating member 16 inserts its boss 18 into the vertical shaft 15 so as to be horizontally rotatable.
When the cleaning tape 2 is passed through the tape threading part 19, the cleaning tape 2 is placed on the inside of the outlet part led out from the tape outlet 4.

Note that a notch 28 is provided at the end of the boss 18 at the base of the vertical shaft 15 to escape from the existing rib 27, and the tension regulating member 16 is inserted into the rib 27.
It is possible to rotate around the vertical axis 15 despite the existence of . The rib 27 exists because the video cassette is used as the main body case 1, and in the case of a video cassette, the rib 27 is aligned with the vertical axis 1.
5 is provided to mount the tape guide roller in a rotation-preventing manner.

In FIGS. 2 and 5, two metal or plastic loading regulating members 21, 21 are placed at positions corresponding to the left and right tape loading pockets 6, 6 on the front wall 1a of the main body case 1. Attach. This loading regulating member 21 is formed in a U-shape, and has a tape holding portion 22 and leg portions 23, 23 bored rearward from both upper and lower ends of the tape holding portion 22, and a check claw 2 at the tip of the leg portion 23.
It has 4. A pair of upper and lower holes 25, 25 are provided in the front wall 1a of the main body case 1 at two places on the left and right, and the legs 23, 23 are inserted into the upper and lower holes 25, 25 from the front of the front wall 1a by the elasticity of the check claw 24. The loading regulating member 21 is attached to the front wall 1a in a manner that prevents it from coming off by inserting it with excessive force. At this time, the loading regulating member 21 is installed so as to be inclined in the same direction at approximately the same angle (19 to 24 degrees) as the inclination angle of the head cylinder 8. Thus, as shown in FIG.
The cleaning tape 2 led out to the front side of the main body case 1 is configured to pass between the cleaning tape 2 and the front wall 1a.

In FIG. 1, a coating roller 26 to which cleaning liquid is supplied from the outside is disposed near the tape outlet 4 in the main body case 1 so as to rotate in sliding contact with the cleaning tape 2.

In the above configuration, when this head cleaner is loaded into the video deck, as shown in FIG.
When the loading post 7 enters the inside of the cleaning tape 2 and moves forward as indicated by arrow A,
The tape 2 is drawn out between the tape outlet 4 and the loading regulating member 21, and between the tape winding opening 5 and the loading regulating member 21, and comes into contact with the head cylinder 8. At this time, the cleaning tape 2 between the pockets 6, 6 is not pulled out due to the presence of the loading regulating members 21, 21, but remains on the front wall 1a and does not come into contact with the head cylinder 8. In other words, the cleaning tape 2 comes into contact with two approximately symmetrical locations on the circumferential surface of the head cylinder 8, and the amount of wrapping around the head cylinder 8 is smaller than when the cleaning tape 2 is wrapped around more than half the circumference of the head cylinder 8. Become something. Therefore, frictional resistance with the head cylinder 8 can be reduced, and damage to the cylinder 8 can be prevented. In addition, since the loading regulating member 21 is inclined, the cleaning tape 2
The entire widthwise direction of the tape 2 contacts the head cylinder 8, and the tape 2 is in a stable contact state without moving up and down in the axial direction on the circumferential surface of the cylinder 8.

After the above-mentioned loading, the tension post 13 moves in the direction of arrow C by the tensile force of a spring (not shown) in the same way as the conventional one described above, but at this time, the post 13 hits the inside of the tension regulating member 16 and remains as it is. When the member 16 is pushed toward the guide roller 14 and the tension regulating member 16 hits the guide roller 14 via the cleaning tape 2, the tension post 13 will no longer be pushed against the guide roller 14.
be prevented from moving in the direction of Therefore,
The cleaning tape 2 is no longer wrapped around the tension post 13 and subjected to back tension, and the cleaning tape 2 runs between the guide roller 14 and the tension regulating member 16 with less running load.

[Another example]

FIG. 6 shows another embodiment of the invention. In this embodiment, upper and lower protrusions 16a, 16a are provided on the side of the tension regulating member 16 facing the guide roller 14, and the protrusions 16a, 16a contact the guide roller 14.
The cleaning tape 2 is passed between a and 16a.

According to this, even if the tension regulating member 16 is pressed against the guide roller 14 by the tension post 13, the cleaning tape 2 will not be pinched between the guide roller 14 and the tension regulating member 16. As a result, the running load on the cleaning tape 2 at that location is significantly reduced.

Note that the protrusion 16a is a threading piece 19a that constitutes the tape threading portion 19 in the embodiment shown in FIG.
It is also possible to have a structure that also serves as a guide roller 14, so that the through piece 19a comes into contact with the guide roller 14.

[Other modified embodiments]

When the tension regulating member 16 is pushed in the direction of arrow C by the tension post 13, its rotation is stopped at a position where a gap equal to or slightly larger than the thickness of the cleaning tape 2 is maintained between it and the guide roller 14. The corners may be restricted. As the rotation angle regulating means, for example, the above-mentioned existing rib 27 at the root of the vertical shaft 15 is actively utilized, and a notch 28 that engages with the rib 27 is formed at the end of the boss 18 of the tension regulating member 16. do it.

In the embodiment shown in FIG. 1, the loading regulating member 21 is provided, which is advantageous in that the friction of the entire tape running system is extremely reduced. However, this is not necessarily necessary, and only the tension regulating member 16 is attached. Good too.

In the above embodiment, the boss 18 of the tension regulating member 16 is inserted into the vertical shaft 15 and the boss 18 is also used as the tape guide 4a shown in FIG. 7, so the number of parts is reduced and the structure can be simplified. However, the tension regulating member 16 may be installed separately from the tape guide 4a shown in FIG. 7 and in parallel with the tape guide 4a. For example, this kind of tape guide 4a
This is advantageous when the main body case 1 and the main body case 1 are integrally molded.

Tape passing portion 19 as tension regulating member 16
If the cleaning tape 2 is passed through this, the tension regulating member 16 will be held by the cleaning tape 2 during both loading and unloading of the cleaning tape 2, which is preferable.
is not necessarily required. This is because during loading, as long as the tension regulating member 16 exists between the cleaning tape 2 and the tension post 13 in the pocket 6, the tension post 13 can be prevented from moving inward of the cleaning tape 2. Furthermore, during unloading, the tension regulating member 16 is pushed back by the cleaning tape 2 as the cleaning tape 2 is pulled back.

The target deck is not limited to VHS format, but also includes a wide range of so-called DAT formats. The cleaning tape 2 is also not limited to being a cloth tape.

[Brief explanation of drawings]

1 to 5 show an embodiment of the head cleaner according to the present invention, in which FIG. 1 is a schematic plan view showing the tape loading state, FIG. 2 is a front view, and FIG. It is a - line sectional view in a figure. FIG. 4 is an exploded perspective view of the main parts, and FIG. 5 is a sectional view taken along the line -- in FIG. 2. FIG. 6 is a sectional view of essential parts showing another embodiment of the present invention. FIG. 7 is a schematic plan view showing a conventional head cleaner in a tape loading state. 1...Main body case, 2...Cleaning tape, 3a...Supply reel, 3b...Take-up reel,
4... Tape feeding port, 5... Tape winding port, 6...
... Loading pocket, 8 ... Head cylinder, 13 ... Tension post, 14 ... Guide roller, 15 ... Vertical shaft, 16 ... Tension regulating member, 21 ... Loading regulating member.

Claims (1)

[Scope of Claims] 1. A supply reel 3a and a take-up reel 3b on which a cleaning tape 2 is wound are rotatably housed inside the main body case 1 on the left and right sides, and the cleaning tape 2 is placed on the left and right ends of the front side of the main body case 1. In a head cleaner which is led out to the front of the case from a tape outlet 4 and a tape winding opening 5 which are open to the front so that it can be loaded by a loading post 7 on the deck side, a tape having a harderness than the cleaning tape 2 is attached to the outlet 4 of the main body case 1. A tension regulating member 16 made of a material with high strength is disposed along the inside of the cleaning tape 2, and the tension regulating member 16 receives the tension post 13 on the deck side, and the cleaning tape 2 is wound around the tension post 13. A head cleaner that is characterized by its ability to clean without causing any problems.