JP2987388B2 - Head cleaner - Google Patents

Description

The present invention relates to a head cleaner for removing dirt from a head with a cleaning tape to which a cleaning liquid is applied,
In particular, the present invention relates to a head cleaner of a digital audio tape recorder (hereinafter, simply referred to as DAT).

[Conventional technology]

As a head cleaner for a VHS system or an 8 mm VCR, for example, a hub in which a cleaning tape is wound in a case substantially the same as a VHS or an 8 mm cassette as shown in Japanese Utility Model Laid-Open No. 42203/1990. And a supporting arm having a liquid supply for applying the cleaning liquid to the cleaning tape is horizontally slidably accommodated.The support arm is in a standby position in which the liquid is separated from the cleaning tape when not in use, and is supplied when used. Are provided so as to be freely switchable to a liquid supply position in contact with the cleaning tape.

The attitude switching means of the support arm is provided between the front arm for protecting the tape mounted on the front side of the case and the support arm, and the attitude for bringing the support arm into and out of the cleaning tape in conjunction with the opening / closing operation of the front lid. A switching member and a return spring of the posture switching member are incorporated.

If the switching of the posture of the support arm can be performed in conjunction with the opening / closing operation of the front lid in this manner, for example,
No special liquid supply position switching operation such as a head cleaner disclosed in -26109 is required, and the support arm position switching is automatically performed in conjunction with opening and closing of the front lid when filling and removing the deck. And easy handling.

[Problems to be solved by the invention]

However, DAT cassettes are smaller than VHS or 8 mm cassettes, and the front lid mounted on the front side is smaller. For this reason, using the rotational movement of the front lid as in the above-described attitude switching means of the support arm involves various difficulties in implementation, and even if realized, the shape and assembly of the attitude switching member become complicated.

The present invention focuses on the fact that a slide plate is incorporated in the bottom of the DAT cassette so as to be movable in the front-rear direction, and by using the operation of the slide plate, the posture of the support arm can be switched, so that the An object of the present invention is to provide a head cleaner that can simplify the structure and assembly.

[Means for solving the problem]

As shown in FIG. 1, for example, a head cleaner which is premised on the present invention has substantially the same form as a DAT cassette. A slide plate 16 is provided at the bottom of the case 1 so as to be movable in the front-rear direction over a front closing position for closing the lower surface of the opening of the tape loading pocket 6 provided on the front side of the main body case 1 and a rear opening position for opening.

Then, the cleaning tape 3 is wound around the hub 4 and the support arm 20 having the liquid supply 19 in the main body case 1 is switched between a liquid supply position where the liquid supply 19 contacts the cleaning tape 3 and a standby position where the liquid supply 19 is separated from the cleaning tape 3. It is installed so that it can swing horizontally around the shaft 21 so that it can be rotated.

Then, between the slide plate 16 and the support arm 20, the backward movement of the slide plate 16 to the rearward open position is caused by the swing of the support arm 20 in the direction of the liquid supply posture, and the slide plate 16 is moved to the front closed position. A deflection mechanism 26 for changing the forward movement of the support arm 20 into the swing of the support arm 20 to the standby posture is provided.

As the deflection mechanism 26, a mechanism in which a regulating portion 27 having a slope 27a is provided on the support arm 20, and a slide pin 29 that slides on the slope 27a is provided on the slide plate 16 is preferable.

[Action]

When the slide plate 16 moves to the rearward open position in use, the support arm 20 is switched to the liquid supply position in which the liquid supply 19 comes into contact with the cleaning tape 3 via the deflection mechanism 26. The cleaning liquid permeating the supply liquid 19 is applied to the cleaning tape 3.

When the slide plate 16 moves to the front closed position, the turning mechanism
The support arm 20 is switched to a standby posture in which the supply liquid 19 is separated from the cleaning tape 3 via 26. Therefore, even if the cleaning liquid is supplied to the liquid supply 19 at this time, the liquid is not supplied.
The cleaning tape 3 does not get wet when transmitted through 19.

〔Example〕

One embodiment of a head cleaner according to the present invention will be described with reference to FIGS.

1 is a perspective view of the head cleaner, FIG. 2 is an internal plan view showing the front lid in a closed state, FIG. 3 is an internal plan view showing the front lid in an open state, and FIG. 4 is a line IV-IV in FIG. FIG. 5 is an enlarged sectional view taken along line VV in FIG.

In FIG. 1 and FIG. 2, the main case 1 of the head cleaner has substantially the same form as the DAT cassette, and upper and lower plastic cases 1a and 1b are abutted and integrally connected with screws P or the like. Drive shaft insertion holes 2 are provided on the left and right of the center of the lower case 1b, and a hub 4 around which the cleaning tape 3 is wound is rotatably disposed on each of the drive shaft insertion holes 2. A tape outlet 5 is formed on the front side of the main body case 1 on the left and right sides, and a tape loading pocket 6 is formed between the tape outlets 5. The cleaning tape 3 is led out of one hub 4 through a tape outlet 5 in front thereof into a pocket 6, and is wound on the other hub 4 located behind the other via the tape outlet 5.

In FIG. 4, a front lid 7 for protecting the tape is pivotally mounted on the front side of the main body case 1 so as to be rotatable around a pivot 9 to close the pocket 6 and the front opening of the tape outlet 5 (when not in use). ) And an upwardly open posture (when used).

Inside the main body case 1 is provided a hub lock plate 10 for preventing the left and right hubs 4 from rotating when not in use. The hub lock plate 10 is movable in the front-rear direction over a rear lock position in which the hub 4 comes into contact with and engages with the notched upper end peripheral surface 4a, and a front unlock position which is separated from the peripheral surface 4a of the hub 4. It is arranged and always urged by the spring member 11 to move toward the lock position. When the front cover 7 is opened and rotated by the operation member on the recorder side, the hub lock plate 10 is indexed to the front unlock position in conjunction therewith (see FIG. 3).

The hub lock plate 10 is entirely formed of plastic and has a locking claw that is detachably engageable with the peripheral surface 4a of the upper end portion of the hub 4.
Left and right horizontally long main plate 10a having 12 and 12, side plates 10b and 10b continuously provided downward at right angles from the left and right ends of the main plate 10a, and an arm portion 10c extending forward from the lower end of each side plate 10b. Having.

The tip of each arm 10c extends along the outer surface of the side wall 13 of the main body case 1 to the position of its front end. The arm 10c has a passive projection 14 projecting outward at the tip of the arm 10c. In the closed position of the front lid 7, as shown in FIG. 1, the rear ends of the left and right side pieces 7a of the front lid 7 are separated from the passive projections 14 from the pivots 9; The piece 7a abuts and engages with the passive projection 14 to index move the hub lock plate 10 toward the front unlock position. (See FIG. 3).

4 and 5, a slide plate 16 is provided at the bottom of the lower case 1b of the main body case 1. The slide plate 16 has a front closed position (solid line diagram in FIG. 4) for closing the lower surfaces of the openings of the pocket 6 and the drive shaft insertion hole 2.
It is slidable over a rear opening position (in FIG. 4, a two-dot chain line diagram).

At the front closed position of the slide plate 16, the slide plate 16 is always urged by a spring 37 for moving and moving the slide plate 16 in the direction of the front closed position, and elastically deformable lock claws 39 provided on the left and right of the bottom of the main body case 1. Is engaged with the lock hole 41 on the rear side of the two lock holes 40 and 41 provided on the right and left sides of the slide plate 16 to maintain the closed state.

When this is loaded into the recorder in this state, the lock claw 39 is pushed into the main body case 1 and the slide plate 16 is pushed backward by the operating member on the recorder side, whereby
The slide plate 16 moves to the rear open position. At the rear open position, the lock claw 39 is engaged with the lock hole 40 on the front side of the slide plate 16, so that the open state is maintained. When taking out from the recorder, the lock claw 39 is released from the front lock hole 40 by the operation member, and automatically moved to the front closed position by the spring 37.

When the slide plate 16 is in the closed state as shown in FIG. 4, the front portion of the side piece 16a of the slide plate 16 reaches a position below the side piece 7a of the front cover 7, and the front cover 7 is opened. Inhibit state. On the other hand, when the slide plate 16 is open as shown in FIG. 1, the side piece 16a moves backward to a position behind the side piece 7a of the front lid 7, so that the front lid 7 can be opened upward and turned. Become.

The mechanism so far is the same as the structure of the DAT cassette except that the cleaning tape 3 instead of the magnetic tape is stored.

 Next, a mechanism specific to the head cleaner will be described.

1 and 2, in order to apply and supply a cleaning liquid to the cleaning tape 3 on the peripheral surface of the hub 4, a left side wall 13 of the main body case 1 and a left feeding side hub 4 are provided.
The liquid application means 17 is provided between the first and second liquid supply means. This liquid application means 17
Supports the base end of a support arm 20 having a liquid supply 19 at the distal end side thereof so as to be horizontally swingable by a shaft 21 erected from the lower case 1b. At the tip end of the support arm 20, there is provided a first liquid reservoir 22 having a cylindrical shape and a second liquid reservoir 23 having a deep dish shape surrounding the outer periphery thereof. The liquid supply 19 is supplied to the first liquid reservoir 22. Its tip 19a
Are mounted so as to protrude in a direction facing the cleaning tape 3.

The liquid supply 19 is made of a porous material such as a sponge or a fiber mass, and is provided with a number of cuts in a sheet or film body to supply and supply the cleaning liquid by a capillary phenomenon, or directly into the cylindrical liquid reservoir 22. The cleaning liquid may be provided and supplied from the fine holes by providing holes.

The second liquid reservoir 23 is provided on the outer periphery of the first liquid reservoir 22 because when the cleaning liquid is excessively supplied to the first liquid reservoir 22, the liquid that overflows from the first liquid reservoir 22 is not removed. This is because the liquid is stored in the second liquid storage part 23 so as not to be spilled into the main body case 1. An occluding mat 24 for absorbing excess cleaning liquid is embedded in the second liquid reservoir 23.

The support arm 20 has a shaft 21 extending between a liquid supply position in which the distal end portion 19a of the liquid supply 19 is brought into contact with the cleaning tape 3 on the peripheral surface of the hub 4 and a standby position in which the liquid supply 19 is separated from the cleaning tape 3.
It can swing horizontally around. And the support arm 20
Is a biasing means by a coil spring mounted on the shaft 21, for example.
At 25, it is always urged to swing in the direction of the liquid supply posture.

The switching of the posture of the support arm 20 is performed using the forward and backward movement of the slide plate 16. For this purpose, a deflection mechanism 26 is provided between the distal end side of the support arm 20 and the slide plate 16 to change the longitudinal movement of the slide plate 16 into a swing between the standby posture and the liquid supply posture of the support arm 20. . This turning mechanism 26 is
A restricting portion 27 having a slope 27a at the tip end side of 20 protrudes rearward, while a sliding pin 2 that slides on the slope 27a from the slide plate 16.
9 is protruded. The sliding pin 29 is attached to the main face plate 1 of the slide plate 16.
The lower case 1b protrudes from an elongated hole 42 formed at the bottom of the lower case 1b.

The sliding pin 29 is always regulated by the urging force of the urging means 25.
In close contact.

When the slide plate 16 moves to the front closed position, the support arm 20 urged in the direction of the liquid supply posture by the urging means 25 slides the slide pin 29 forward on the slope 27a of the regulating portion 27. Then, the tip 19a of the liquid supply 19 is switched to the standby position in which the tip 19a is separated from the cleaning tape 3 and swings (see FIG. 2). When the slide plate 16 is moved to the rearward open position during use, the support arm 20 slides the slide pin 29 on the inclined surface 27a of the regulating portion 27 in the backward direction opposite to the above, and attaches the leading end 19a of the liquid supply 19 to the cleaning tape 3. Switch to the liquid supply position to be contacted and swing (third
See figure).

In the liquid supply position shown in FIG. 3, in order to intermittently apply the cleaning liquid to the cleaning tape 3, the cross-sectional shape of the hub 4 is formed in an eccentric elliptical shape, and the hub 4 is formed on the peripheral surface at the intersection with the major axis. A cleaning liquid is applied to the cleaning tape 3.

In FIG. 5, a liquid supply port 34 for injecting a cleaning liquid such as isopropyl alcohol is opened in a transparent window plate 33 provided in the upper case 1a. The liquid supply port 34 is set so as to be located directly above the first liquid reservoir 22 when the support arm 20 is in the standby posture.

When the support arm 20 is in the standby position, the liquid supply 19 is separated from the cleaning tape 3. Therefore, even if the cleaning liquid is injected into the liquid supply port 34, the cleaning liquid 3 may be transmitted through the liquid supply 19 and wet the cleaning tape 3. There is no.

(Another embodiment)

In the above embodiment, a sliding pin 29 is provided as a deflection mechanism 26 so as to protrude from the main face plate 16a of the slide plate 16, but instead of this, as shown in FIGS.
The arm 35 may be horizontally protruded, the tip of the arm 35 may be protruded into the case from the long hole 42 of the side wall 13 of the lower case 1b, and the slide pin 29 may be protruded from the tip.

In the above embodiment, the intermittent coating method is adopted, but a continuous coating method may be used instead.

Further, as shown in FIG. 8, the deflecting mechanism 26 includes a bell crank 36
9 and 10, a through hole 43 is obliquely provided in the restricting portion 27 on the support arm 20 side as shown in FIGS. 9 and 10, and the sliding pin 29 on the slide plate 16 side is provided in the through hole 43. Sliding parallel slopes
27a may be formed. According to this, the urging means 25 is not required, and the structure can be further simplified. In this case, in order to ensure the contact between the liquid supply 19 and the cleaning tape 3, the support arm 20 itself is formed of an elastic synthetic resin or a metal spring material, and an appropriate pressing force is applied to the cleaning tape 3. You only have to have it. Instead of the through hole 43 shown in FIG. 10, a groove 44 may be provided as shown in FIG. 11, and the slope 27a may be formed inside the groove 44.

〔The invention's effect〕

According to the head cleaner of the present invention, since the DAT head is cleaned using the cleaning tape 3 and the cleaning liquid, the cleaning effect is large.

In particular, as means for switching the support arm 20 between the standby position and the liquid supply position in conjunction with opening and closing of the front cover 7, the conventional front cover 7
By using the forward and backward movement of the slide plate 16 instead of using the rotation, the deflection mechanism 26 which has a simple structure and does not require a return spring or the like is sufficient, and the assembly thereof can be easily performed.

[Brief description of the drawings]

1 to 5 show an embodiment of a head cleaner according to the present invention. FIG. 1 is a perspective view, FIG. 2 is an internal plan view in a state where a liquid supply is in a standby position, and FIG. Fig. 4 is an enlarged cross-sectional view taken along the line IV-IV in Fig. 2, and Fig. 5 is an enlarged cross-sectional view taken along the line VV in Fig. 2. 6 and 7 show another embodiment of the head cleaner according to the present invention. FIG. 6 is an internal plan view in a state where the liquid supply is in a standby posture, and FIG. 7 is a liquid supply. FIG. 4 is an internal plan view in a posture. FIG. 8 is a plan view of a main part showing still another embodiment of the head cleaner according to the present invention. 9 and 10 show still another embodiment of the head cleaner according to the present invention. FIG. 9 is a plan view of a main part, and FIG. 10 is a sectional view taken along line AA in FIG. is there. FIG. 11 is a sectional view corresponding to FIG. 10, showing still another embodiment of the head cleaner according to the present invention. 1 ... body case, 3 ... cleaning tape, 4 ... hub, 16 ... slide plate, 19 ... liquid supply, 20 ... support arm, 21 ... shaft, 26 ... deflection mechanism, 27 ... Regulator, 29 ... Sliding pin.

Claims (2)

(57) [Claims] A hub (4) with a cleaning tape (3) wound thereon is rotatably housed in a main body case (1), and a slide plate (16) is provided at the bottom of the main body case (1). The main body case (1) is provided movably in the front-rear direction over a front closing position for closing a lower surface of an opening of a tape loading pocket (6) provided on a front side of the case (1) and a rear opening position for opening. A support arm (20) having a liquid supply (19) for supplying the cleaning liquid to the cleaning tape (3) has a liquid supply position in which the liquid supply (19) comes into contact with the cleaning tape (3) and a standby state for separating from the cleaning tape. It is installed so that it can swing freely around the axis (21) so that it can be switched to the posture, and between the slide plate (16) and the support arm (20), the rearward movement of the slide plate (16) 20) Liquid supply appearance Head cleaner, characterized in that the deflection mechanism for changing each forward movement to swing to the standby position of the support arm (20) (26) is provided in the swinging to and slide plate (16). 2. A deflecting mechanism (26) having a regulating portion (27) having a slope (27a) on a support arm (20), and a sliding plate (1).
The head cleaner according to claim 1, wherein a sliding pin (29) sliding on the slope (27a) is provided on 6).