JPH0329766Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an improvement of a cassette-type cleaner for cleaning the surface of a recording/reproducing head capstan in a tape recorder.

[Conventional technology]

As shown in FIG. 1, a general compact cassette for recording and playback has a pad 57 made of felt or the like and a leaf spring 58 on the inside of the tape, facing the opening 55.
The holding portion 60 is provided with a holding portion 60 formed by. When the magnetic head 56 comes into contact with the tape 59, the tape 59
The pressure from the head 56 is moderately suppressed by the leaf spring 58, thereby increasing the degree of pressure contact between the tape 59 and the head 56, and achieving good recording and playback.

In the case of a cassette type cleaner as well, since the cleaning tape 54 cleans the object while being in contact with the head 56, which is the object to be cleaned, the pressure contact between the tape 54 and the head 56 is as important as with the recording/reproducing tape.

[Problem that the invention attempts to solve]

However, as shown in FIG. 2, in the conventional holding section, when the head 56 enters the tape 54, the leaf spring 58 bends inward, causing the pad 57 to bend.
A gap A is created between the pad 57 and the leaf spring 58. Furthermore, in wet head cleaners, since the tape is made of highly water-absorbing cloth, strong friction occurs between the pad 57 made of felt, etc., causing the pad 57 to If the pad 57 is dragged in the tape traveling direction, there is a risk that the pad 57 may become displaced or fall off from the leaf spring 58, and the tape winding load may increase. For this reason, the holding part 60 is not used in conventional wet head cleaners.
Therefore, cleaning tape 54 and head 56
The degree of pressure contact between them was small, and the cleaning ability could not be said to be sufficient.

[Means for solving problems]

This device has an opening on the front of the case, and a cleaning tape that is fed out on the front of the case comes into contact with the magnetic head that enters the opening to clean the head. A leaf spring formed by continuous formation of a cleaning receiving surface formed substantially parallel to the tape running direction, an inclined surface formed in a shape that widens toward the end at both ends of the receiving surface, and a flat plate portion substantially parallel to the receiving surface. is arranged to serve as a tape holding part, and the above-mentioned locking part is placed between ribs that are set up from the main body case at positions shifted from each other in the longitudinal direction of the L-shaped locking part at both ends of this flat plate part. It is located.

[Function and effect]

This idea is based on a wet head cleaner with a holding part 10.
In order to provide good cleaning performance, the shape of the leaf spring 11 of the holding part 10 is changed from the conventional flat plate shape to a substantially square shape to reduce the force applied to the pad 20 in the tape traveling direction and the advancing direction of the head 6. The deflection of the leaf spring 11 due to the force applied to the pad is absorbed by the elastic lower flat plate portion 31, and the cleaning receiving surface 12 on which the pad 20 is installed is always kept flat, thereby preventing misalignment between the pad 20 and the leaf spring 11. , which prevents it from falling off.

〔Example〕

Examples will be described below with reference to the drawings.

As shown in FIG. 2, two reels, a supply reel 3 and a take-up reel 4, of approximately the same specifications as the Puripus type compact cassette half are arranged,
The cleaning tape 2 is wound around the reels 3 and 4 via guide rollers 5 and 6 which also serve as cleaning liquid supply sections. There is a head 1 on the front of the case.
An opening 1 for introducing zero is provided, and a leaf spring 11 having a tape receiving surface is disposed inside the cleaning tape 2 facing the opening 1, and presses the tape from the inside.

As shown in FIG. 4, the leaf spring 11 has a cleaning receiving surface 12, an inclined surface 30, and left and right flat plate parts 31, and the cleaning receiving surface 12 is provided with pads 20 having shearing properties such as felt or sponge. . Leaf spring 11
As shown in FIG. 5, the sloped surface 30 of
It is inclined in substantially the same direction as the resultant force c→ direction of the force b→ which enters inside and presses the pad 20 through the tape, and the left side is inclined in a direction symmetrical to the right side. Further, the cleaning receiving surface 12 and the flat plate portion 31 are substantially parallel to the tape running direction in the tape path portion 18.

The left and right flat plate portions 31 are longer than the inclined surface 30 and the cleaning receiving surface 12, so the flat plate portion 31 is longer than the inclined surface 30.
0 and cleaning receiving surface 12. A positioning portion 32 for the pad device is formed on the cleaning receiving surface 12.

L-shaped locking parts 22 and 23 are formed at both ends of the leaf spring 11 to prevent the leaf spring 11 from coming off, and ribs 24 and 25 are formed upright from at least one side of the main body case 13. is attached to. The ribs 24, 25 are formed at positions offset from each other in the longitudinal direction of the locking parts 22, 23, and the locking parts 22, 23 are positioned between them.
Furthermore, positioning ribs 26 for leaf springs are provided along the upper surfaces of the left and right flat plate parts 31 to prevent the flat plate parts 31 from buckling upward.

Further, a tension adjustment pin 7 is erected from at least one side of the main body case 13 at a position slightly inside the imaginable outer tangent line A of the supply side reel 3 and the supply side guide roller 5.

As shown in FIG. 3, the cleaning tape 2 fed out from the outside of the supply reel 3 comes into contact with the inside of the pin 7, continues along the outer periphery of the guide roller 5 to the opening 1, and guides the take-up side. It passes through a roller 6 and is wound onto a take-up reel 4.

When cleaning objects to be cleaned, such as the magnetic head 10 of a magnetic regenerator, using the cassette type cleaner constructed as described above, the cassette type cleaner is first set in the magnetic regenerator and a regeneration operation is performed. The head 10 then moves into the opening 1 of the main case 13 and comes into contact with the tape.

As shown in FIGS. 5a, b, and c, the tape 2 is pushed down and comes into pressure contact with the pad 20 of the pressing part 21 provided inside the tape 2, and at the same time the cleaning receiving surface 12 of the leaf spring 11 is pushed down. A rotating shaft (not shown) inserted into the rotating shaft insertion hole 27 on the take-up reel 4 side is driven, and the tape 2 starts running. The tape moves while being pressed against it by the pad 20 from inside, and the dust adhering to the head 10 is wiped off and cleaned.

Since there is strong sliding friction between the tape 2 and the pad 20, a force is exerted that tends to move the pad 20 in the direction of movement of the tape 2 (see Fig. 5b).
reference). Therefore, the holding portion 21 is subjected to the resultant force c→ of the force b→ applied in the head advancing direction and the force a→ applied in the tape running direction, but the flat plate portion 31
Since the elastic force of is higher than the elastic force of the cleaning receiving surface 12 and the inclined surface 30, the force a applied to the cleaning receiving surface 12 →
The resultant force c→ of b→ and b→ is directly transmitted to the flat plate portion 31 via the inclined surface 30.

At this time, since the L-shaped locking portions 22 and 23 at both ends are located between the ribs 24 and 25 that are formed at positions shifted from each other in the longitudinal direction of the locking portions 22 and 23, the locking portions The L-shaped corner parts of 22 and 23 are
It is caught by the inner rib 24 to prevent the tape from shifting in the tape traveling direction (lateral direction), and the L-shaped tip is locked by the rib 25 on the outer side and at a position shifted from the inner rib 24. There is.

Therefore, when no pressing force is applied to the leaf spring 11, the L-shaped locking parts 22 and 23 are located between the ribs 24 and 25 in a wobbling manner, but when the pressing force is applied during use, Therefore, the locking portions are ribs 24, 25.
Therefore, the flat plate portion 31 has its base on the side of the locking portions 22 and 23 aligned with the inclined surface 30.
Since both ends of the flat plate portion 31 are sloped, the flat plate portion 31 is uniformly curved and deformed between these ends, and can absorb the resultant force c→, so that the cleaning receiving surface 12 does not bend. This makes it possible to maintain a flat state (see Figure 5c).

When the cleaning tape 2 is wound onto the take-up reel 4 and the running is completed, the head 10 separates from the tape 2 and cleaning is completed.

〔effect〕

As described above, according to the present invention, the opening 1 is provided at the front of the case, and the cleaning tape 2 fed out to the front of the case comes into contact with the magnetic head 10 that enters the opening 1, thereby cleaning the head 10. The mechanism includes a cleaning receiving surface 12 formed on the inside of the tape 2 facing the opening 1 substantially parallel to the tape running direction, an inclined surface 30 formed in a shape that widens at both ends of the receiving surface, and the receiving surface. Face 12
A plate spring 11 is formed by continuously forming a flat plate part 31 substantially parallel to the tape holding part 21, and L-shaped locking parts 22, 23 are attached at both ends of the flat plate part 31 in the longitudinal direction. between the ribs 24 and 25 that are erected from the main body case 13 at mutually shifted positions,
By positioning the locking parts 22 and 23,
Even when the head 10 comes into contact with the tape 2 and enters the cassette case 13, the cleaning receiving surface 12 is pushed down without bending, so that no gap is created between it and the pad 20, and the pad 20 does not drag in the tape traveling direction. Even if the pad 20 is moved, the flat plate portion 31 is curved and absorbs the force, so that the cleaning tape 2 is appropriately pressed against the head 10 without causing the pad 20 to shift or fall off, and good cleaning can be performed.

[Brief explanation of the drawing]

FIG. 1 is a front view of a recording/playback tape, FIG. 2 is an enlarged view of a conventional tape holding part, and FIG. 3 is a cutaway cross-sectional plan view of a cassette-type head cleaner according to this invention.
FIG. 4 is a perspective view of the leaf spring of the same embodiment, and FIG. 5 is an explanatory view of the cassette type head cleaner according to this invention when it is actually used. DESCRIPTION OF SYMBOLS 1... Opening, 2... Tape, 10... Magnetic head, 11... Leaf spring, 12... Cleaning receiving surface, 1
3... Main body case, 21... Tape holding part, 2
2, 23...L-shaped locking part, 24, 25...rib, 30...slanted surface, 31...flat plate part.

Claims (1)

[Scope of utility model registration request] In a mechanism that has an opening 1 at the front of the case, the cleaning tape 2 fed out to the front of the case comes into contact with the magnetic head 10 entering the opening 1 to clean the head 10.
A cleaning receiving surface 12 formed substantially parallel to the tape running direction on the inside of the tape 2 opposite to the tape 2, and an inclined surface 30 formed in a shape that widens at both ends of the receiving surface.
and a flat plate part 31 that is substantially parallel to the receiving surface 12 are disposed continuously to form the tape pressing part 21, and L-shaped locking parts are provided at both ends of this flat plate part 31. Ribs 2 erected from the main body case 13 at positions shifted from each other in the longitudinal direction of 22 and 23
A cassette type cleaner in which the locking parts 22 and 23 are located between the parts 4 and 25.