JPH0713047Y2 - Head cleaner - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a wet head cleaner, that is, a head cleaner in which a liquid supply member for applying a cleaning liquid to a tape is exposed to the outside of a main body case for liquid replenishment. Regarding

[Conventional technology]

In a wet type head cleaner, it is necessary to replenish a fixed amount of cleaning liquid to the liquid reservoir or occlusion body in the case and apply it to the tape running through rollers or pads.
It is known in Japanese Utility Model Publication No. 61-16710.

In addition, in order to accurately supply liquid to the liquid supply member such as the liquid reservoir or the occlusion body without excess or deficiency, the head cleaner capable of exposing the liquid supply member to the outside of the main body case,
It has been previously proposed by the applicant (Japanese Patent Application No. 63-14415).
issue).

[Problems to be solved by the device]

As described above, in the head cleaner in which the liquid supply member is swingably displaced between the application posture inside the main body case and the replenishment posture exposed to the outside of the case, the posture of the liquid supply member is changed by the operation member provided on the outer surface of the case. Will be switched. In that case, it is necessary to operate the operation member after replenishing the liquid to move the liquid supply member back into the case. However, there is a risk that the liquid supply member may be erroneously loaded into the tape deck without exposing the case without performing the restoring operation. Alternatively, the liquid supply member may be misused such as being loaded on the tape deck without being completely returned to the coating posture.

In both cases of erroneous loading and erroneous use, the cleaning liquid is not applied to the tape, and the magnetic head cannot be properly cleaned. In particular, in the case of erroneous loading, the liquid supply member interferes with the case loading mechanism during the case loading, which causes new problems such as damage of the liquid supply member and malfunction of the case loading mechanism.

The present invention is a further development and improvement from this point of view, and the purpose thereof is to prevent the liquid supply member from being completely loaded into the tape deck unless the liquid supply member is returned to the normal position in the case, so that erroneous loading and misuse are ensured. To get a head cleaner that can be prevented.

[Means for Solving the Problems]

According to the present invention, a loading prevention tool 38 is provided which protrudes outside the case to prevent loading into the deep deck, and switching operation is interlocked with the displacement of the liquid supply member 12 to eliminate erroneous loading and misuse. .

Specifically, as shown in FIG. 1 and FIG. 2, a loading prevention tool 38 is provided on the main body case 1 so as to be retractable, and this loading prevention tool is provided.
The 38 and the liquid supply member 12 are interlocked and linked, and when the liquid supply member is in the replenishing posture A, the loading preventing tool 38 projects outside the case.

[Action]

When the liquid supply member 12 is switched to the replenishing posture A which is exposed to the outside of the case by the operation member 10, the loading preventing tool 38 is attached to the main body case 1.
Project outwards. Even if the head cleaner is loaded into the tape deck in this state, the loading prevention tool 38 comes into contact with the loading port on the deck side to prevent further insertion, thereby making the loading incomplete. Therefore, the case loading mechanism does not operate, the head cleaner is prevented from being drawn into the tape deck, and at the same time, the user is informed of incorrect loading or misuse.

[First Embodiment] FIGS. 1 to 5 show a first embodiment in which the present invention is applied to a head cleaner for a VHS-C type video deck. Its basic form is substantially the same as the VHS-C type video tape cartridge.

In FIG. 3, a pair of reels 3 and 4 around which a cleaning tape 2 is wound are rotatably arranged on the left and right sides of a main body case 1 in which upper and lower halved cases 1a and 1b are joined together in a lid-fitting manner. . Tape 2 derived from delivery reel 3
Is taken up by the take-up reel 4 after traversing the tape loading pocket 7 via the tape guides 5 and 6 at the left and right ends on the front surface of the case. In other words, the reel-to-reel method is used for tape feeding.

A front lid 8 is provided on the front surface of the case to cover and protect the outer surface of the tape 2 when not in use. The front lid 8 is pivotally attached to the main body case 1 so as to be openable and closable about a pivot axis (not shown) in a posture in which the front face of the main body is closed and in a posture in which the front face is opened. .

The main body case 1 is provided with a liquid supply member 12 that faces the tape path on the delivery reel 3 side and applies the cleaning liquid to the cleaning tape 2. More specifically, the liquid supply member 12 is arranged in the rear left and right central portion of the main body case 1 using a triangular dead space surrounded by both reels 3 and 4 and the rear side wall 1c of the main body case 1. .

In FIGS. 1 and 4, a liquid supply member 12 is provided with a vertical axis 13 standing upright from the bottom wall of the case, a holder 14 fitted to the vertical axis 13 from above, and supported horizontally swingably. The coating pad 15 stores the cleaning liquid in an impregnated state.

The holder 14 is continuously extended toward the rear side of the case from a boss portion 14a that is inserted through the vertical axis 13. A holding cylinder 16 having a keyhole-shaped cross section is provided at the tip of the holder 14 so as to project upward and open. A passive pin 17 is provided so as to project upward at the upper opening edge of 16.

The application pad 15 is made of felt or sponge in the shape of a flat plate. When the application pad 15 is inserted into the holding cylinder 16 from above, the plate surface is parallel to the vertical surface, and a part of the circumference is the circumference of the holding cylinder 16. It protrudes outward from a part of the surface. In order to partially apply the cleaning liquid, the protruding end of the application pad 15 is formed in an uneven shape.

The liquid supply member 12 has a replenishing posture A protruding outside the case shown in FIG. 2 and a coating posture B retracting inside the case shown in FIG.
Can be switched to and. Further, in order to perform intermittent coating in the coating posture B, it is possible to move between the coating standby posture (solid line state in FIG. 1) and the coating execution posture (imaginary line state in FIG. 1). Among these attitude controls, the application attitude B and the supply attitude A
The posture is switched by the operation member 10 provided on the rear side wall (outer wall) 1c of the main body case 1. The posture switching for intermittent coating is performed by using the rotation operation of the pay-out reel 3. The details will be described below.

In FIGS. 3 and 4, the operating member 10 is an operating plate 19
And an interlocking arm 20 for swinging a loading prevention device 38, which will be described later, are integrally formed, and a connecting arm 21 is horizontally swingably attached to the inner surface of the operation plate 19. As shown in FIG.
The upper and lower ends are sandwiched and held by the shallow slide grooves 22 and 22 provided in the upper and lower cases 1a and 1b, and the opening and closing window 18 for the holding cylinder 16 is opened and closed while sliding left and right along the rear side wall 1c. . Further, the spring 23 applied to the base end portion of the interlocking arm 20 causes the entire operation plate 19 to slide and urge to return to the standby state shown in FIG.

The slide motion of the operation plate 19 is performed by the holder via the connecting arm 21.
Transmitted to 14. For this purpose, a pin 24 is provided on the upper surface of the arm of the holder 14 so as to project from the pin, and the pin 24 is connected to the operating member 10 by a connecting arm 21. The connecting arm 21 is engaged with the pin 24 through the elongated hole-shaped engaging frame 25, and is relatively displaceable with respect to the holder 14 within the range of the elongated hole portion. And can swing freely. This is to absorb the difference in operation between the operation plate 19 and the holder 14 and to displace the holder 14 from the coating standby posture to the coating execution posture.

In FIG. 2, when the operating member 10 is slid rightward against the spring 23, the connecting arm 21 follows and slides a certain amount, and then the tip of the engaging frame 25 abuts the pin 24, and the liquid supply member The holder 14 of 12 is rotationally displaced counterclockwise. At the slide end of the operating member 10 to the right, the holding cylinder
The liquid replenishment receiving portion at the upper end of the opening 16 is exposed to the outside of the case through the window 18. In order to maintain this state, as shown in FIG. 5, an engaging claw 26 is laterally projected on one side of the inner surface of the operation plate 19, and the claw 26 is recessed in the ceiling wall of the upper case 1a. Elastically engages with the engaging recess 27. When the operation plate 19 is slid to the left to release the engagement between the engagement claw 26 and the engagement recess 27, the operation member 10
Is automatically returned to the standby state by the urging force of the spring 23, and the liquid supply member 12 is switched to the coating posture B.

In order to perform intermittent coating in the coating posture B, a liquid supply member
A torque applying mechanism 29 between the holder 14 of 12 and the take-up reel 4
And a control cam on the upper flange 3a of the feeding reel 3
30 formed.

In FIG. 4, the torque applying mechanism 29 has a drive gear 31 that meshes with gear teeth 4c formed on the peripheral edge of the lower flange 4b of the take-up reel 4, and a driven gear 32 that meshes with the gear 31. The driven gear 32 is rotatably supported on the vertical axis 13, is disposed below the holder 14, and its upper end surface faces the holder 14 via a friction plate 34. A slip spring 35, which is a compression spring, is interposed between the upper surface of the boss portion 14a of the holder 14 and the upper wall of the case. With this spring 35, the boss portion 14a is pressed against the drive gear 32 via the friction plate 34. is doing. The friction plate 34 is made of felt in the shape of a disk, and is driven by the driven gear 32.
When the passive pin 17 of the holder 14 is received and supported by the upper flange 3a of the feed reel 3, the driven gear 32 slips with respect to the driven gear 32.

The drive gear 31 is rotatably supported via a shaft 36 that stands from the bottom wall of the case. The gear 31 transmits the rotational force of the take-up reel 4 to the driven gear 32, and imparts the rotational force in the clockwise direction to the holder 14 via the friction plate 34.

As shown in FIG. 3, the control cam 30 is formed by cutting out two opposing portions of the peripheral edge of the upper flange 3a. Only at the position where the control cam 30 is formed, the holder 14 can swing toward the tape winding layer, and at other positions, the passive pin 17 of the holder 14 can be swung.
Are pushed back onto the arc edge of the upper flange 3a. Intermittent coating is performed by this displacement.

In order to prevent erroneous loading and misuse of the head cleaner, a loading prevention tool 38 is provided between the rear right corner of the main body case 1 and the take-up reel 4. 1 and 5,
The loading prevention tool 38 is formed in the shape of an arm and has a vertical boss at the base end.
38a is swingably supported from a bottom wall of the case by a vertically extending support shaft 39, and the arm 38b is positioned between the upper and lower flanges of the take-up reel 4, and the arm 38b is opened to the side wall 1d of the case. The oscillating displacement can be made to the operating posture (state of FIG. 2) protruding from the window 40 to the outside of the case.

In order to change the posture of the loading prevention tool 38, the arm portion 38b
An auxiliary arm 38c is projectingly provided on one side, and a pin 41 is projectingly provided on the lower surface thereof. On the other hand, an interlocking arm 20 is integrally provided on the operation plate 19. In FIG. 1, the interlocking arm 20 is formed in a crank shape in a plan view, and the tip of the interlocking arm 20 engages with the pin 41 U.
A character-shaped engaging frame 42 is provided. The loading prevention tool 38 is interlockingly connected to the liquid supply member 12 via the interlocking arm 20 and the connecting arm 21.

When cleaning the magnetic head, the operation member 10 is operated to expose the liquid supply member 12 to the outside of the case as described above, and in this state, the cleaning liquid is dropped on the holding cylinder 16 and applied to the coating pad 15. Impregnate. Next, the operation member 10 is returned to the standby state, and the liquid supply member 12 is returned to the coating posture B. At this time, since the holder 14 is braked by the friction plate 34, even if the control cam 30 is positioned corresponding to the returning position of the holder 14, the holder 14 is stopped in the coating standby position. Therefore, the cleaning liquid is not excessively supplied to the tape winding layer before the head cleaner is loaded into the VCR after the liquid replenishment.

When the head cleaner is loaded on the deck, the cleaning tape 2 is pulled out by the tape loading member. At this time, since the cleaning tape 2 is not wound around the take-up reel 4, the take-up reel 4 hardly rotates and the holder 14 of the liquid supply member 12 maintains the above state. If the take-up reel 4 rotates, the liquid supply member 12 tries to rotate toward the outside of the case, but the holding cylinder 16 comes into contact with the operating member 10 to prevent further rotation. ， Liquid supply member
12 continues to maintain the application posture B. At this time, the friction plate 34 also slips. Even when the tape is rewound, the liquid supply member 12 is not exposed outside the case for the same reason.

After that, the cleaning tape 2 is run to the take-up reel 4 side in the reproduction mode for cleaning. If the cleaning liquid is quick-drying and the tape path from the liquid application position during loading to the magnetic head is long, the cleaning is performed while fast-forwarding and playing the tape 2 in the search mode. It may be possible to prevent vaporization before reaching.

When the tape running is started in each of the above modes, the take-up reel 4 rotates clockwise. Along with this, the driven gear 32
Continues to apply the rotational moment in the clockwise direction to the holder 14 of the liquid supply member 12 via the friction plate 34. As a result, the liquid supply member 12 swings toward the delivery reel 3 side, but further swinging is prevented at the position where the passive pin 17 abuts the peripheral edge of the upper flange 3a. At this time, the boss portion 14a slips on the friction plate 34. When the control cam 30 rotates to the position of the passive pin 17, the passive pin 17 falls into the control cam 30, and the entire liquid supply member 12 swings toward the center of the reel 3 and the tip of the coating pad 15 moves. Contacts the tape winding layer to apply and supply the cleaning liquid to the cleaning tape 2. When the feeding reel 3 further rotates and the inclined edge of the control cam 30 contacts the passive pin 17, the passive pin 17 is pushed back and the liquid supply member 12 swings in the opposite direction against the rotational force of the drive gear 32. Move. This swing causes the application pad 15 to separate from the tape surface. After that, each time the feeding reel 3 rotates once, the coating pad
In No. 15, the cleaning liquid is applied twice each intermittently.

Now, it is assumed that the operation member 10 is slid to the right after replenishment of the liquid, and the head cleaner is accidentally loaded on the tape deck while the holding cylinder 16 of the liquid supply member 12 is exposed outside the case. In this case, since the loading prevention tool 38 also projects outside the case, it cannot be inserted any further when it comes into contact with the loading port. At this time, since the loading preventing tool 38 is received and supported by the case side wall 1d, even if an unreasonable pushing force acts, the interlocking arm 20 does not reach the force. Therefore, the user is alerted that there was an error in the work procedure other than removing the head cleaner from the tape deck,
It is noticed that the liquid supply member 12 must be returned to the normal state and operated through the operation member 10.

In the replenishing posture A shown in FIG. 2, the connecting arm 21 is engaged with the pin 24 on the tip side of the engaging frame 25. Therefore, the operating plate
Even if 19 is slid left and right, the connecting arm 21 tries to move independently with respect to the holder 14. However, in this state the holder 14
Since the arm portion of the holder is located near the side end of the operation plate 19, the holder 14 is directly pushed by the operation plate 19 and swings to return to the mounting posture B shown in FIG. Further, since the operation plate 19 is biased by the spring 23 for returning, the operation plate 19 does not stop during the return and the returning operation of the liquid supply member 12 does not become incomplete. Even if the liquid supply member 12 cannot be completely restored due to some reason, the liquid supply member 12 is forcibly oscillated and displaced by the operating force of the torque applying mechanism 29, so that the cleaning liquid is applied to the tape 2. It is possible to avoid the situation where it is not applied.

[Second Embodiment] FIG. 6 shows a second embodiment of the present invention. In this, the loading preventive tool 38 is arranged on the case side wall 1e on the front left side of the main body case 1, and the first link 44, the bell crank 45, and the second link 46 are provided.
The intermediate transmission mechanism consisting of is capable of changing the posture.

The first link 44 is a stay 47 protruding from the inner surface side end of the operation plate 19.
Connected to.

As described above, when the loading prevention device 38 is arranged close to the front of the case, the loading prevention device 38 contacts the loading opening of the tape deck at the initial stage of loading, so that it can be more clearly shown that the loading is wrong, Helps to abandon forced pushing.

[Another embodiment mode example]

In the above-described embodiment, the loading preventing tool 38 is shown to be oscillatingly displaced, but it is not always necessary and it may be a linearly moving operation. For example, the interlocking arm in the first embodiment
20 is extended to the right, and this extension end is
It is also possible to project from 40 and prevent mis-loading. Of course, the loading preventive tool 38 may project outward from the upper wall or the bottom wall of the main body case 1. Also,
As the window 40, a cutout portion for exposing the gear teeth 4c of the take-up reel 4 to the outside of the case may be used.

If the liquid supply member 12 is the tape path on the feeding reel 3 side,
Any location in the main body case 1 may be used as long as the assembly is allowed.

The present invention can also be applied to head cleaners for VHS type VCRs, 8 mm VCRs, and other types of tape decks such as DAT decks. In addition to intermittent coating, continuous coating is also available as the coating mode. It may be applied. Further, the head cleaner tape feeding method may be an endless method other than the reel-to-reel method.

In the replenishment posture A, at least a part of the liquid replenishment receiving portion of the liquid replenishment member 12 may be exposed to the outside of the case, and it is not always necessary to expose the whole.

[Effect of device]

As described above, in the present invention, the main body case 1 is provided with the loading prevention tool 38 for preventing loading on the tape deck, and when the liquid supply member 12 is exposed to the outside of the case, the loading prevention tool 38 is provided.
Also, since the attitude of projecting outside the case is maintained so that the tape deck cannot be loaded, it is possible to reliably prevent the liquid supply member 12 from being erroneously loaded in the replenishing attitude A.
As a result, the situation in which the cleaning liquid is not supplied to the tape 2 due to erroneous loading or misuse is eliminated, and the magnetic head can always be properly cleaned. Further, it is possible to eliminate the situation where the liquid supply member 12 interferes with the case loading mechanism due to erroneous loading, and the liquid supply member 12 is broken or the operation of the case loading mechanism is impaired.

[Brief description of drawings]

1 to 5 show a first embodiment of a head cleaner according to the present invention. FIG. 1 is an internal plan view of an essential part, FIG. 2 is an internal plan view of an essential part in a replenishing posture, 3 is a plan view of the entire interior, FIG. 4 is a sectional view taken along line AA in FIG. 3, and FIG. 5 is a sectional view taken along line BB in FIG. FIG. 6 is an internal plan view showing a second embodiment of the head cleaner according to the present invention. 1 …… Main body case, 2 …… Cleaning tape, 10 …… Operating member, 12 …… Liquid supply member, 15 …… Coating pad, 20 …… Interlocking arm, 38 …… Loading prevention tool.

Claims (1)

[Scope of utility model registration request] 1. A head cleaner comprising a liquid supply member 12, an operation member 10 for switching the liquid supply member 12 between a coating posture B inside the case and a replenishing posture A exposed to the outside of the case. An anti-loading device 38 is provided on the case 1 so as to be retractable, and the anti-loading device 38 and the liquid supply member 12 are interlockingly connected. When the liquid supply member 12 is in the replenishing posture A, the anti-loading device 38 is a case. A head cleaner characterized in that it is configured to project to the outside.