JPH0734488Y2 - Cleaning cassette - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a wet type cleaning cassette for intermittently supplying and supplying a cleaning liquid, and in particular, it is of a type for intermittently applying the rotation operation of a tape reel. .

[Conventional technology]

In the cleaning cassette, the intermittent application using the rotation operation of the tape reel is disclosed in, for example, the actual open sho 63-
It is known from Japanese Patent No. 181105. This is to perform intermittent coating by swinging the coating arm between the coating state and the standby state,
The rotation operation of the tape reel is used to change the posture of the coating arm.

Specifically, the rotational power of the tape reel is taken out through a gear group, and a swinging moment is applied to the coating arm by a friction transmission plate provided between the final gear and the coating arm. A cam groove is provided around the flange of a tape reel different from the tape reel, and intermittent coating is performed by bringing the coating arm into contact with the winding cylinder only when the pins provided on the coating arm fall into the cam groove.

[Problems to be solved by the device]

In the type in which the coating arm is oscillated to perform intermittent coating as described above, a mechanism for switching the posture is indispensable. Moreover, when not in use, it is necessary to return the coating arm to a position right below the liquid filling port, which has disadvantages such as a complicated structure as a whole and a high manufacturing cost of the cleaning cassette.

The present invention has been proposed in view of the above, and enables intermittent coating while the coating member is kept in a fixed position, thereby simplifying the structure of the intermittent coating mechanism and The purpose is to reduce the manufacturing cost.

[Means for Solving the Problems]

In the present invention, by making the cross-sectional shape of the winding drum 15 of the tape reel 2 non-circular, or by making the circular winding drum 15 eccentric,
Apply intermittently.

That is, as shown in FIG. 1, the liquid application section 16 having different distances from the reel center P on the peripheral surface of the winding drum 15 of the pay-out reel 2.
And the non-application section 17 are provided, and the application member 5 is arranged so that the application pad 7 of the application member 5 is circumscribed only with the liquid application section 16.

[Action]

When the tape 4 is pulled out from the delivery reel 2, the coating pad 7 contacts the tape 4 only in the liquid coating section 16 to perform intermittent coating. Therefore, it suffices if the application member 5 is mounted at a fixed position and it is not necessary to change the posture thereof, so that the intermittent application mechanism can be greatly simplified.

〔Example〕

1 to 4 illustrate a cleaning cassette applied to a VHS type VCR as an embodiment of the present invention.

In FIG. 4, the cleaning cassette has a feeding reel 2 and a take-up reel 3 inside a cassette body 1 in the shape of a thin box, and both reels 2 and 3 wind a cleaning tape 4 bidirectionally. It was done like this. The basic structure is substantially the same as that of a tape cassette applied to a VHS type VCR. The tape 4 is formed of a cloth or leather tape that can be impregnated with the cleaning liquid, or a synthetic paper tape that allows the cleaning liquid to penetrate.

An application member 5 for applying the cleaning liquid to the tape 4 is arranged at the rear corner of the cassette body 1 on the side of the delivery reel 2. This coating member 5 is composed of upper and lower cassette halves 1a and 1b.
And a holder 6 supported by the holder 6 so as to be horizontally swingable.
And a pair of spring plates 8 projecting from the outer surface of the holder 6, and a cap 9 that is press-fitted to the upper end of the holder 6.

2 and 3, the holder 6 has a cylindrical wall 10 having a bottomed cylindrical shape, and a pad frame having a rectangular cylindrical shape from the peripheral surface of the cylindrical wall 10.
A shaft portion 12 and a cap 9 projecting from the lower surface of the cylindrical wall 10 are axially supported by upper and lower cassette halves 1a and 1b, respectively. The application pad 7 is made by pressing fibers into a felt shape, and is fitted into the pad frame 11. In the mounted state, one end of the application pad 7 has a cylindrical wall.
It traverses the inside of 10, and the other end slightly projects from the projecting end of the pad frame 11. The cap 9 is exposed on the upper surface of the upper cassette half 1a in order to inject the cleaning liquid, and the injection port 13 is vertically penetrated therein.

As shown in FIG. 1, when the coating member 5 is incorporated in the cassette body 1, one of the spring plates 8 is in contact with the inner surface of the side wall 1c of the cassette body 1, and the other spring plate 8 is in contact.
Is in contact with the outer surface of the screw boss 1d for fixing the upper and lower cassette halves 1a and 1b. Both spring plates 8 and 8 are provided to position the holder 6 in the horizontal direction in a free state, and at the same time, to absorb the movement when the coating pad 7 is pushed in the rotation direction of the pay-out reel 2 as described later. .

The feeding reel 2 is provided with a winding cylinder 15 for winding the tape 4 between the upper and lower flanges 2a and 2b. By making the cross-sectional shape of the winding cylinder 15 non-circular and alternately forming the liquid coating portions 16 and the non-coating portions 17 on the peripheral surface, intermittent coating can be performed by the coating member 5 arranged at a fixed position.

The liquid application part 16 is composed of two sets of partial arc walls facing each other in the radial direction, and the non-application member 17 is composed of two sets of linear walls facing each other in the radial direction. Each liquid application part 16 is provided on an imaginary circumferential surface having the same diameter with the reel center P as the center, and compared with the vertical distance H from the reel center P to the non-application part 17, liquid application from the reel center P is performed. The radial distance R to the portion 16 is set to be sufficiently large.

The take-up reel 2 and the take-up reel 3 are both supported on the lower cassette half 1b in a radially movable state, and are only loaded in the cassette deck and connected to the drive shaft of the cassette. The relative position with respect to the main body 1 becomes constant. In the standard state in which the relative position is fixed, the center position of the spindle of the holder 6 is determined so that the coating pad 7 can contact the liquid coating section 16. Specifically, the holder 6
The distance a from the center of the spindle to the tip surface of the coating pad 7,
It is set to be slightly larger than the distance b between the liquid application part 16 and the center of the spindle of the holder 6 in the standard state.

Incidentally, in the unused state, both reels 2 and 3 are attracted to the front of the case, so that the application pad 7 is unlikely to come into contact with the liquid application section 16. This means that the application pad 7 does not come into contact with the tape 4 only after the cleaning cassette is loaded in the cassette deck, and the cleaning liquid impregnated in the application pad 7 is not attached to the tape 4 before loading in the deck. 4 is advantageous in that it can be prevented from being excessively supplied.

When using the cleaning cassette, a predetermined amount of cleaning liquid is dripped from the inlet 13 into the cylindrical wall 10 to impregnate the coating pad 7. After that, when the cleaning cassette is loaded into the cassette deck, the tape 4 is attached to the cassette body 1.
It is pulled out from and is held in standby in a predetermined loading posture. Next, when the cassette deck is operated in the reproduction mode, the tape 4 is sent to clean the magnetic head.

At this time, the liquid application part 16 and the non-application part 17 of the winding drum 15 alternately pass in front of the application member 5 as the delivery reel 2 rotates. When the liquid application section 16 passes in front of the application member 5, the tape 4 located on the outer surface thereof contacts the application pad 7 as shown in FIG. 2, and the cleaning liquid is applied and supplied to the outer surface of the tape 4. . Non-coated part 17 as shown in phantom
When the tape passes, the tape 4 located on the outer surface thereof and the coating pad 7 do not come into contact with each other. Therefore, the cleaning liquid can be intermittently applied and supplied to the tape 4 even though the applying member 5 is mounted at a fixed position.

When the coating pad 7 is in external contact with the tape 4, the coating member 5 receives a moment of tape running due to a frictional force between the both, and the whole swings slightly. By this swinging, the spring plate 8 contacting the side wall 1c is flexibly deformed, and the application pad 7 is pressed against the tape 4 with an appropriate pressure. Further, when the non-application section 17 passes, the entire application member 5 is oscillated to return to the state before the oscillation. Similarly, the spring plate 8 on the side that contacts the screw boss 1d
When the tape 4 is rewound on the delivery reel 2, the swing of the coating member 5 is absorbed to prevent the rotation of the delivery reel 2 from being prevented.

[Another embodiment]

5 (a) and 5 (b) respectively show other embodiments of the pay-out reel 2.

In FIG. 5 (a), a circular winding drum 15 is arranged eccentrically with respect to the reel center P, and a liquid application portion 16 and a non-application portion 17 are provided on the peripheral surface thereof.
Was formed.

In FIG. 5 (b), the winding drum 15 is formed in a triangular shape surrounded by a salient arc, each side portion is a non-application portion 17, and each corner portion is a liquid application portion 16.

In this way, the cross-sectional shape of the winding cylinder 15 can be changed to a polygon, a circle, an ellipse, a composite shape of these, or the like.

The present invention is applicable to video decks other than VHS system, such as β system and 8 system.
It can also be applied to cleaning cassettes used for VCRs such as mm video.

[Effect of device]

As described above, in the present invention, the winding drum 15 of the feeding reel 2 is
Is formed into a non-circular shape, for example, and the liquid application part 16
The tape 4 wound around the winding drum 15 by providing the
The cleaning liquid can be applied and supplied intermittently by bringing the cleaning liquid into and out of contact with the coating member 5 arranged at a fixed position. Therefore, it is not necessary to change the posture of the coating member 5, the mechanism for performing intermittent coating can be made extremely simple, and the manufacturing cost of the cleaning cassette can be reduced.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a cross-sectional view of an essential part, FIG. 2 is an enlarged view of part B in FIG. 1, and FIG. 3 is FIG. 4 is a sectional view taken along the line AA in FIG. 4, and FIG. 4 is an internal plan view showing the overall schematic structure. FIGS. 5 (a) and 5 (b) are explanatory views showing different embodiments of the delivery reel. 1 ... Cassette body, 2 ... Delivery reel, 3 ... Take-up reel, 4 ... Tape, 5 ... Coating member, 15 ... Winding cylinder, 16
…… Liquid coating part, 17 …… Non-coating part, P …… Reel center.

Claims (3)

[Scope of utility model registration request] 1. A cassette body (1) has a supply reel (2) and a take-up reel (3) inside, and a cleaning liquid is applied and supplied to a tape (4) outside the periphery of the supply reel (2). In the cleaning cassette in which the coating member (5) is arranged, a liquid coating section (16) having a different distance from the reel center (P) on the peripheral surface of the winding drum (15) of the feeding reel (2) is provided. A cleaning cassette characterized in that a non-application section (17) is provided, and the application member (5) is arranged so that the application pad (7) of the application member (5) is circumscribed only with the liquid application section (16). 2. A holder (6) in which an application member (5) is swingably supported by upper and lower cassette halves (1a, 1b), and an application pad (7) mounted on the holder (6). The cleaning cassette according to claim 1, further comprising a pair of spring plates (8) projectingly provided on the outer surface of the holder (6) for returning and swinging the holder (6). 3. Two sets of liquid application parts (16) and non-application parts (17) arranged alternately on the peripheral surface of the winding drum (15), the two liquid application parts (16) facing each other in the radial direction. The cleaning cassette according to claim 1 or 2, wherein the non-coating portion (17) is formed by two sets of linear walls that face each other in the radial direction.