JPH0619816B2 - Cleaning cassette for video tape recorder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning cassette used in a video tape recorder of a video home system (hereinafter abbreviated as VHS), and more specifically, it relates to a cleaning cassette wound around one reel and the other cleaning tape. The present invention relates to a cleaning cassette for a video tape recorder in which a contact area of a cleaning tape with a head cylinder is reduced in a cleaning cassette of a type in which a magnetic head is cleaned while being wound on a reel.

[0002]

2. Description of the Related Art FIG. 3 shows a typical conventional example of this type of cleaning cassette. That is, this cleaning cassette has a VHS tape cassette housing 1, and a cleaning tape 2 such as an artificial chamois or a cloth ribbon is laid between the supply reel and the take-up reel in place of an ordinary magnetic tape. It consists of things. Therefore, when the cassette housing 1 is mounted on the video deck and the start button is pressed, the cleaning tape 2 is pulled out by the pair of guide pins 3a and 3b and wound around the head cylinder 4 to which the video head 9 is attached. Impedance rollers 5, 5
As a result, an appropriate tension is applied, the pinch roller 7 contacts the capstan 6, and the capstan 6 is fed at a predetermined speed.
According to this, each of the full-width erasing head 8, the video head 9, the audio erasing head 10 and the audio control head 11 is cleaned. In this case, in order to enhance the cleaning effect, the cleaning tape 2 is soaked with the cleaning liquid. The wet method used as the above is preferable. However, as shown in the figure, since the contact area of the cleaning tape 2 with the head cylinder 4 is large, when the wet type is used, the load on the tape running system is increased, which may adversely affect the video deck side. On the other hand, there is a cleaning cassette in which the cleaning tape is pulled out to either one of the head cylinders.

Further, FIG. 4 illustrates a conventional example in which the cleaning tape 2 is pulled out to the front of the head cylinder 4, that is, the full width erasing head 8 side by one guide pin 3a. According to this, the contact area of the cleaning tape 2 with respect to the head cylinder 4 is significantly reduced as compared with that shown in FIG. 3, but since the cleaning tape 2 is stationary in the pulled-out state,
The cleaning effect on the full-width erasing head 8 is low, and the voice erasing head 10 and the voice control head 11 are not cleaned at all. Such a drawback also applies to the cleaning cassette in which the cleaning tape 2 is pulled out to the rear of the head cylinder 4, that is, the voice erasing head 10 side by the other guide pin 3b.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional drawbacks, and an object thereof is to make a contact area of a cleaning tape with a head cylinder small and clean each head cleanly. A cleaning cassette for a video tape recorder that is suitable for wet processes is provided.

[0005]

SUMMARY OF THE INVENTION The present invention has a cassette housing suitable for a VHS type video deck, and a cleaning tape wound on a supply reel is wound on a take-up reel for cleaning. In the recorder cleaning cassette, a bypass means is provided between the pair of guide pin insertion recesses formed on the front surface of the cassette housing, and when the cleaning tape is pulled out by the pair of guide pins,
The cleaning tape passing through one of the guide pins passes through the bypass means and is positioned on the other guide pin.

[0006]

With the above construction, the cleaning tape from the supply reel passes through one guide pin at the time of cleaning, is temporarily returned to the inside of the cassette housing by the bypass means, and then is wound around the take-up reel through the other guide pin. Taken. Therefore, the cleaning tape comes into tangential contact with the peripheral surface of the head cylinder in the path from one guide pin to the bypass means and in the path from the bypass means to the other guide pin, resulting in a large contact area. Even if a wet cleaning tape coated with a cleaning liquid is used, the heads can be reliably cleaned without imposing an excessive load on the tape system. Further, since the cleaning tape cleans the head while being wound from one reel to the other reel, the cleaning tape is not locally soiled.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an embodiment shown in FIGS. In these figures, the same parts as those shown in FIGS. 3 and 4 described above are designated by the same reference numerals.

This cleaning cassette is provided with a cassette housing 20 conforming to the VHS type, and the structure on the front side thereof is schematically shown in FIGS. 1 and 2. A known supply reel and a take-up reel (not shown) are provided in the cassette housing 20, the cleaning tape 2 is laid between them, and the front side of the cassette housing 20 is provided. As is known, a recess 21 into which the guide pins 3a and 3b are inserted
a and 21b are provided. In this example,
As the cleaning tape 2, for example, a synthetic resin tape having a finely satin-finished surface is used.

Between the recesses 21a and 21b, when the cleaning tape 2 is pulled out of the cassette housing 20 by the guide pins 3a and 3b, the guide pins 3a are formed.
The cleaning tape 2 passed through is the cassette housing 2.
Bypass means 22 is provided for forming a bypass path through the inside of 0 to the guide pin 3b. In this embodiment, the bypass means 22 has a first guide pin 22a standing on the side of the recess 21a on one side and a recess 2 on the other side.
A second guide pin 22b provided upright on the 1b side, and a guide roller 22c arranged near the guide pin 22b.
And the first guide pin 2
Between the 2a and the guide roller 22c, a cleaning liquid application means 23 including a felt or the like for applying the cleaning liquid to the cleaning tape 2 passing therethrough is provided. Further, a cleaning liquid application means 24 for applying the cleaning liquid to the cleaning tape 2 unwound from the reel is also provided on the supply reel side (not shown).

On the other hand, a groove 25 for inserting the capstan 6 is formed on the front surface of the cassette housing 20 on the take-up reel side as is well known. In this groove 25, when the cassette housing 20 is set. A tape supporter 26 that holds the cleaning tape 2 so that the capstan 6 and the cleaning tape 2 do not interfere with each other.
And a cleaning pad 27 made of felt or the like for cleaning the pinch roller 7, and the cleaning tape 2 is wound between a tape supporter 26 and the cleaning pad 27 on a take-up reel (not shown). There is. The tape supporter 26 has a guide pin 26 at the end of a spring elastic body 26a formed in a substantially U shape.
On the other hand, the cleaning pad 27 has a spring elastic body 2 having substantially the same shape as the spring elastic body 26a.
It is supported at the end of 7a.

In the above structure, when the cassette housing 20 is mounted on the video deck and the start button is pressed, the guide pins 3a, 3 are inserted in the recesses 21a, 21b.
b, and the capstan 6 in the groove 25 is shown in FIG.
Inserted as shown in. After that, the cleaning tape 2 is pulled out by the guide pins 3a and 3b as shown in FIG. 2, and the pinch roller 7 contacts the capstan 6. As a result, the cleaning tape 2 is fed at a constant speed, but the recesses 21a,
Since the bypass means 22 is provided between the cleaning tape 2 and the head cylinder 21, the cleaning tape 2 comes into tangential contact with the head cylinder 4. Therefore, even if the cleaning liquid is applied to the cleaning tape 2 by the cleaning liquid applying means 23 and 24, there is almost no risk of excessive addition to the running system of the video deck. In addition, all heads including the full width erasing head 8 can be cleaned cleanly. Furthermore, since the cleaning pad 27 elastically contacts the pinch roller 7,
The pinch roller 7 is also effectively cleaned.

[0012]

As is apparent from the above description of the embodiments, according to the present invention, the cleaning tape is brought into tangential contact with the head cylinder of the video tape recorder, so that the contact area can be reduced. It is significantly reduced, and even if a wet cleaning tape is used, each head can be effectively cleaned without imposing an excessive load on the tape running system. Further, since the cleaning tape cleans the head while being wound from one reel to the other reel, it can be used for a long period of time without locally contaminating the cleaning tape.

[Brief description of drawings]

FIG. 1 is a schematic internal structure diagram showing an embodiment of a cleaning cassette of the present invention in an inoperative state.

FIG. 2 is an explanatory diagram showing the operating state thereof.

FIG. 3 is an explanatory diagram illustrating an example of a conventional cleaning cassette.

FIG. 4 is an explanatory diagram for explaining another example of a conventional cleaning cassette.

[Explanation of symbols]

 2 cleaning tape 3a, 3b guide pin 4 cylinder 20 cassette housing 21a, 21b recess 22 bypass means 22a first guide pin 22b second guide pin 23, 24 cleaning liquid applying means 27 cleaning pad

Claims (1)

[Claims] A cleaning cassette for a video tape recorder, which has a cassette housing adapted to a VHS type video deck and performs cleaning while winding a cleaning tape wound around a supply reel on a take-up reel, is formed on the front surface of the cassette housing. Bypass means is provided between the pair of guide pin insertion recesses, and when the cleaning tape is pulled out by the pair of guide pins, the cleaning tape passing through one of the guide pins is bypassed. A cleaning cassette for a video tape recorder, characterized in that the cleaning cassette is positioned on the other guide pin through the means.