JPH0452807Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a wet type head cleaner that cleans a head cylinder on the deck side by impregnating and coating a cleaning tape with a cleaning liquid. In particular, this invention relates to a head cleaner in which the tape is pulled out to the front of the main body case when loaded onto a deck, and has a characteristic improvement regarding the timing of applying cleaning liquid to the tape.

[Conventional technology]

In this type of head cleaner, a coating roller is placed inside the main body case, and this coating roller is impregnated with a certain amount of cleaning liquid in advance, and the cleaning liquid is applied to the entire surface of the tape as the tape is pulled out. There is something. In this case,
There are disadvantages in that the tape sticks to the head cylinder on the deck side, damaging the cleaning tape, and the running load at the start of tape running becomes excessive, resulting in poor running.

Therefore, it has been proposed to intermittently apply a cleaning liquid to the tape.
It is publicly known from the publication No. 132613.

[Problem that the invention attempts to solve]

However, in such conventional head cleaners, the applicator roller is always in contact with the tape. Therefore, at the same time as the tape is pulled out by the tape loading operation, the application roller applies the cleaning liquid to the tape. In other words, before the tape starts traveling in the winding direction, the tape impregnated with the cleaning liquid is in close contact with the head cylinder on the deck side.

As a result, the starting torque at the start of tape running becomes excessive, causing the tape to become unable to run or causing a failure on the head cylinder side.

The present invention was proposed in order to solve the conventional problems with such wet head cleaners, and its purpose is to perform cleaning until tape loading is completed and tape running starts normally. The purpose is to prevent the tape from sticking to the head cylinder without applying cleaning liquid to the tape.

[Means for solving problems]

That is, in the head cleaner of the present invention, when the cleaning tape 2 is loaded on the deck and starts running in the winding direction, the liquid application means 12 comes into contact with the tape 2 and applies the cleaning liquid to the tape 2. It is.

Specifically, as shown in FIG. 1, by utilizing the tape winding operation of the take-up reel 4 after tape loading, the liquid application means 12 in the standby position is switched to the application position by the position switching mechanism 32. . The attitude switching mechanism 32 includes a take-up reel 4 and a liquid application means 1.
2, when the reel 4 rotates in the direction to wind up the tape 2 after tape loading,
The liquid application means 12 is operated to switch to the application position in response to the rotational power.

[Effect of idea]

According to the head cleaner of the present invention, the liquid applying means 12 does not come into contact with the tape 2 not only during the preparatory stage of replenishing the cleaning liquid to the liquid applying means 12 but also during the loading operation of the cleaning tape 2. Therefore, no cleaning liquid is applied to the tape 2. When tape running is started after tape loading is completed, the liquid application means 12 comes into contact with the tape 2 to apply liquid. Therefore, the cleaning liquid is not applied excessively to the tape 2 in advance, and the tape 2 is not applied during the next tape run.
It is possible to reliably prevent troubles such as sticking to the head cylinder H on the deck side and making it impossible to run the tape, or damaging the head cylinder H due to excessive load.

〔Example〕

The drawing shows an embodiment of a head cleaner in which the present invention can be loaded into a β-type video deck.
Its basic form is substantially the same as that of a β-type videotape cartridge.

In Figure 2, the upper and lower half-split cases 1a, 1
A pair of reels 3 and 4, on which cleaning tape 2 is wound, are rotatably disposed on the left and right sides of the main body case 1, which is formed by connecting the cleaning tape 2 with its lids together. The tape 2 drawn out from the feed reel 3 crosses the loading pocket 7 via the tape guides 5 and 6 at the left and right ends of the front of the case, and then is transferred to the take-up reel 4.
It is wound up. In other words, it uses a reel-to-reel method.

The front of the case has a front lid 8 that covers and protects the outer surface of the tape 2 when not in use. The front cover 8 is pivoted to the main case 1 (upper case 1a) so that it can be rotated to open and close around a pivot shaft 8a between a case front closing position and an upwardly open position, and is rotated by a spring member 9 to the closed position. It is dynamically energized. It also has a locking means (not shown) for holding the front cover 8 in a closed state.

At the central front part of the pocket 7, there is a guide wall 10 that faces the inside of the front lid 8 and supports the back side of the tape 2.
is formed projecting from the lower case 1b.

Inside the main body case 1, there is provided a liquid application means 12 for applying a cleaning liquid to the tape 2, facing the tape path on the feed reel 3 side. Specifically, the liquid application means 12 is arranged in a triangular space surrounded by both reels 3 and 4 and the rear wall 1c of the main body case 1 at the left and right center of the rear of the main body case 1. .

In FIGS. 2 and 3, the liquid application means 12
The vertical shaft 13 is driven into the bottom wall of the case and fixed,
a holder 14 that has a boss portion 14a that fits onto the vertical shaft 13 from above and is supported in a horizontally swingable manner;
It consists of a coating pad 15 that stores cleaning liquid in an impregnated state.

The holder 14 extends from the boss portion 14a toward the rear of the case, and has a keyhole-shaped holding frame 16 projecting upwardly at its tip and a driven pin 17 projecting upwardly. The applicator pad 15 is made of felt or sponge formed into a flat plate, and when it is dropped into the holding frame 16 from above and attached, the plate surface becomes parallel to the vertical plane, and a part of it is attached to the tip of the holding frame 16. It protrudes outward from the side opening.

The liquid application means 12 can be operated to switch between the standby position shown in FIG. 2 and the application position shown in FIG. It is possible to switch between the execution posture (the virtual line state in FIG. 1). Among these posture controls, the posture switching operation from the standby posture to the coating posture or in the opposite direction is performed by the posture switching mechanism 32 using the rotational movement of the take-up reel 4. Further, the posture change for intermittent coating is performed using the rotational movement of the feed reel 3. Let me explain the details next.

First, the passive arm 18 is extended from the boss portion 14 toward the front of the case. On the other hand, a position holding means 20 is provided between the upper surface of the guide wall 10 and the liquid application means 12, which uses the opening/closing operation of the front cover 8 to hold the liquid application means 12 in a standby position when not in use.

In FIGS. 2 and 3, the posture holding means 20 includes a slide lever 21 supported on the upper surface of the guide wall 10 so as to be slidable back and forth,
A spring 22 that presses the case toward the rear side.
and a return lever 23 that converts the back-and-forth movement of the lever 21 into horizontal swinging motion and acts in contact with the passive arm 18.
It consists of

The front end of the plate surface of the slide lever 21 has a pawl hole 2 in which a locking pawl 24 protruding from the inner surface of the upper wall of the front cover 8 engages.
5. An operating pin 26 is provided protruding from the lower surface of the rear end of the slide lever 21, and this pin 26 engages with an elongated cam groove 27 provided at the front end of the bell crank-shaped return lever 23. The spring 22
are the compartment wall 7a of the pocket 7 and the slide lever 21.
It is interposed between the spring receiving part 28 near the rear end. The return lever 23 is supported to be swingable around a vertical shaft 29 relative to the main body case 1, and has an operating arm 30 extending from the shaft boss toward the rear of the case in a step-like manner. The end can come into contact with the side surface of the distal end of the passive arm 18 .

When the front lid 8 is in the closed position, the slide lever 21 is pulled toward the front of the case by the locking pawl 24 against the urging force of the spring 22, as will be described later. From this state, the front cover 8 is placed on the deck side of the operating member 3.
When the opening operation is performed in step 1, the locking claw 24 comes out of the claw hole 25. Now, as shown in FIG. 5, the slide lever 21 is moved toward the rear of the case by the spring 22, and the operating pin 26 pushes the cam groove 27.
The operating arm 30 is separated from the passive arm 18, allowing the liquid application means 12 to switch to the application position. In the figure, the liquid application means 12 is not forcibly switched to the application position, but is only allowed to do so.

Following the opening operation of the front cover 8, the tape 2 is pulled out of the case by a loading member L on the deck side and wound around the head cylinder H, as shown in FIG. After this tape loading is completed, preferably the fast forward button is operated while the playback mode is maintained, the search mode is set, and the tape 2 is run so as to be wound onto the take-up reel 4 for cleaning. This is because the tape path from the liquid application position to the head cylinder H is long, and this is to prevent the cleaning liquid from vaporizing when quick-drying Freon or the like is used as the cleaning liquid. Of course, cleaning may be performed in the regeneration mode depending on the characteristics of the cleaning liquid.

At the time of the above-mentioned loading operation and after the start of tape running, the liquid application means 12 is oscillated by the attitude switching mechanism 32 using the rotational operation of the take-up reel 4 as a driving source. First, during tape loading, the take-up reel 4 rotates counterclockwise due to the tape pulling operation, and in response to this rotation, the posture switching mechanism 32 applies a counterclockwise moment to the liquid application means 12. As a result, the standby position is forcibly maintained as shown in FIG. When tape running is started, the take-up reel 4 rotates in the opposite direction to that during tape loading, so the posture switching mechanism 32 applies a moment in the clockwise rotation direction to the liquid application means 12, changing the position from the standby position to the application position. Switch.

In FIGS. 1 and 4, the attitude switching mechanism 32 includes a drive gear 33 formed around the upper flange 4a of the take-up reel 4, an input gear 34 that meshes with this gear 33, and a rotating gear that rotates along with the input gear 34. intermediate gear 35 and vertical shaft 13 of liquid application means 12.
A final gear 36 is rotatably supported by the intermediate gear 35 and meshes with the intermediate gear 35. The input gear 34 and the intermediate gear 35 are connected to the vertical shaft 13
They are disposed on the upper and lower surfaces of an arm 37 that is swingably supported around the periphery, and are each fixed to a gear shaft 38 that is rotatably supported by the arm 37. In other words, the input gear 34 can approach and separate from the drive gear 33 while the intermediate gear 35 is always in mesh with the final gear 36. The arm 37 has a spring 3 provided on one side of its tip.
9 is pressed toward the drive gear 33, and the input gear 34 is always in mesh with the drive gear 33 so as to be able to come into contact with and separate from the input gear 34. In addition, in order to make the meshing force of the input gear 34 with respect to the drive gear 33 appropriate, especially the pressure contact force, the arm 37 is
A stopper 4 contacts the tip of the stopper 4 to define the swing limit.
8 is provided protrudingly from the inner bottom wall of the lower case 1b.

The final gear 36 is disposed between the holder boss portion 14a and the arm 37, and is located between the boss portion 1
4a are vertically opposed to each other with a friction plate 40 interposed therebetween. A pressing spring 41 is interposed between the lower surface of the boss portion 14a and the inner bottom wall of the case, and this spring 41 presses the holder 14 against the final gear 36 via the friction plate 40.

The friction plate 40 is made of felt formed into a disk shape, and transmits the rotational force of the final gear 36 to the holder 14, and causes the final gear 36 to slip rotate when the holder 14 maintains the coating position.

As described above, the posture switching mechanism 32 forcibly holds the liquid application means 12 in the standby posture in response to the rotational movement of the take-up reel 4 during tape loading.
The take-up reel 4 rotates counterclockwise as the tape is pulled out. This rotational force is transmitted from the drive gear 33 to the final gear 3 via the input gear 34 and intermediate gear 35.
6 and is transmitted to the liquid applying means 1 via the friction plate 40.
A counterclockwise rotational moment is applied to the second holder 14. Therefore, no matter what position the holder 14 is in, it is forcibly switched to the standby position, so the cleaning liquid is not applied to the tape 2 during tape loading.

In FIG. 1, when the drive gear 33 rotates in the same direction as the take-up reel 4 rotates in the tape winding direction P, power is transmitted to the final gear 36 via the input gear 34 and the intermediate gear 35, and this rotation The force acts on the boss portion 14a of the holder 14 of the liquid application means 12 via the friction plate 40. As a result, the holder 14 is switched to the coating position, and the driven pin 17 provided on the distal end side of the holder 14 is pressed against the periphery of the upper flange 3a of the feed reel 3.

In the above coating position, the coating pad 15 is slightly separated from the tape layer wound around the circumferential surface of the feed reel 3, and is still in the coating standby position shown by the solid line in FIG. This is to perform intermittent coating. Control cams 43 are provided at two opposing locations on the peripheral edge of the upper flange 3a.
When the driven pin 17 of the holder 14 falls into the control cam 43, the holder 1
4 swings toward the center of the reel 3, and the tip of the coating pad 15 comes into contact with the surface of the tape 2 as shown by the imaginary line in FIG. 1 to apply and supply cleaning liquid to the tape 2. . When the driven pin 17 is pushed back by the inclined edge of the control cam 43, the applicator pad 15 separates from the tape surface again, and this process is repeated to intermittently apply the cleaning liquid.

It should be noted that during tape winding, the final gear 36 constantly rotates and applies a moment to the holder 14, but the holder 14 is slipping against the friction plate 40 while not swinging.

3, a liquid supply port 44 is opened in the upper wall of the main body case 1 in order to supply cleaning liquid to the application pad 15 of the liquid application means 12 in advance. As shown in FIG. 6, the liquid supply port 44 is provided at a position directly above the holding frame 16 of the holder 14 in the standby position, and the upper surface of the opening of the funnel-shaped injection hole 45 is covered with a rubber sheet or polyethylene sheet cover 46.
The cover 46 has a U-shaped notch that divides the cover surface into six equal parts, allowing the tip of a cleaning liquid container to be easily inserted and preventing dust from entering under normal conditions.

After cleaning is completed, the tape 2 is rewound to the feed reel 3 side by switching to the rewind mode or by using the auto return mode. At this time, the final gear 36 is C in FIG.
Since it rotates in the direction of the arrow, the holder 14 is operated from the coating position to the standby position. Thereafter, the front lid 8 returns from the open position to the closed position, and the locking pawl 24 on the front lid 8 side engages in the pawl hole 25 of the slide lever 21 from above. That is, as shown in the enlarged view of FIG. 3, the spring force of the spring member 9 is
2, the tip inclined surface 24a of the locking pawl 24 engages in a wedge shape while contacting the front edge 25a of the pawl hole 25, so that the slide lever 21
Pull out the case toward the front. Then, return lever 2
3 swings in the direction of arrow Q shown in FIG.
8 and forcefully returns the liquid applying means 12 to the standby position shown in FIG. 2. This attitude switching is performed regardless of the operating state of the attitude switching mechanism 32. Therefore, when the front cover 8 is closed and not in use,
The liquid applicator 12 always maintains a standby position and is restrained without changing its position until the front lid 8 is opened for the next use. In this state, the applicator pad 15 is coated with liquid as shown in FIG. It is located directly below the supply port 44.

[Another embodiment example]

In the above embodiment, the intermediate gear 35 and the final gear 36 are provided in relation to the swinging direction of the holder 14, but this is not necessarily necessary. For example, the holder 14 swings counterclockwise from the standby position to apply If the position is changed, the input gear 34 can also be changed to function as the final gear 36.

The holder 14 may be constantly urged to move to the standby position by a suitable spring member, and to this extent the position holding means 20 can be omitted.

When the present invention is applied to a head cleaner for a VHS video deck, there is a release operation hole for the reel brake means near the liquid application means 12, so this can be used to change the attitude of the liquid application means 12. You may go. In other words, the posture holding means 20 does not need to utilize the opening/closing operation of the front cover 8.

The control cam 43 for performing intermittent coating can also be formed as a protrusion instead of a notch.

The application pad 15 of the liquid application means 12 may be cylindrical as in the conventional example, or may be one that applies the liquid in stripes at multiple locations in the vertical direction of the tape 2 at small intervals. .

This invention is also applicable to 8mm video deck or
It can also be applied to DAT decks.

[Brief explanation of the drawing]

The drawings show an embodiment of the head cleaner according to the present invention; FIG. 1 is a plan view of the main parts, FIG. 2 is a plan view of the entire interior, and FIG.
4 is a sectional view taken along the line B--B in FIG. 2, FIG. 5 is an overall plan view in a tape loading state, and FIG. 6 is a view taken along arrow D in FIG. 3. 1...Main body case, 2...Cleaning tape, 3...Feeding reel, 4...Take-up reel, 12
...Liquid application means, 13...Vertical axis, 14...Holder, 15...Applying pad, 20...Position holding means, 32...Position switching mechanism.

Claims (1)

[Claims for Utility Model Registration] (1) Inside the main body case 1 which houses a pair of reels 3 and 4 on which the cleaning tape 2 is wound, a cleaning liquid is applied to the cleaning tape 2 so as to face the tape path on the feed reel 3 side. A liquid applicator 12 for coating is provided, and the liquid applicator 12 can be freely switched between a coating position in which it contacts the cleaning tape 2 and a standby position in which it is away from the tape 2. It has a posture switching mechanism 32 that receives the rotational power of the take-up reel 4 and switches the liquid application means 12 between a coating posture and a standby posture. This head cleaner is configured to switch the liquid application means 12 from a standby position to a coating position in conjunction with the rotational movement in the winding direction. (2) Inside the main body case 1, there is a position holding means 2 that restrains and holds the liquid application means 12 in a standby position when not in use.
0, and the attitude holding means 20 is configured to allow the liquid application means 12 to switch from the standby attitude to the application attitude during the loading operation to the deck. Head cleaner.