JPH01169716A - Magnetic head contacting mechanism - Google Patents

Abstract

PURPOSE:To eliminate an impact when a head rushes on a tape and to stabilize rotational scanning by varying the distance of a magnetic head to the surface of a recording medium in case the head is on the surface than the distance in case the head is out of the medium. CONSTITUTION:A rotary disk 7 mounted with a magnetic head 11 on the main magnetic pole side is shaped as a blade of a fan. The head 11 is disposed near the highest point in the direction of a rotary shaft 9, hence, when the head 11 approaches the magnetic tape 3 because of the rotation of the disk 7, the blade part 7-a of the rotary disk gradually presses the tape 3, so that the optimum press-contacting state is attained when the position of the head 11 comes. As a result, the impact at a time when the magnetic head rushes onto the tape can be eliminated and the most suitable head-touch can be realized. And by making the rotary disk 7 itself in a blade-like shape, the constitution can be simplified as well the cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording/reproducing device, and particularly provides a magnetic head scanning head suitable for a small-sized, high-density magnetic recording/reproducing device.

[Conventional technology]

Traditionally, in magnetic recording and reproducing equipment,
As described in Japanese Patent No. 571, a method has been proposed in which a magnetic head is mounted on a rotating disk (VC) and scans a magnetic tape in an arc shape.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology does not take into consideration the means to ensure stable head touch when performing high-density recording. However, there was a problem in that the contact of the magnetic head with the magnetic tape became unstable, making it impossible to obtain a reliable head touch.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic head contact mechanism for a magnetic recording/reproducing apparatus that can solve the above problems and ensure stable head touch during high-density recording.

[Means for solving problems]

The above objectives are to control the shape of the rotating disk on which the magnetic head is mounted, the position of the magnetic tape with respect to the rotating disk, and to press the tape against the magnetic head due to the wind pressure generated by the 9-rotating disk. This is accomplished by etc.

[Effect]

The rotating disk on which the S air head is mounted has the shape of a fan blade, and the magnetic head is mounted at the highest position of the blade, so when the magnetic head is incident on the magnetic tape, the blade gradually changes as the disk rotates. is crimped onto magnetic tape,
Since it is optimally crimped at the position of the magnetic head, there is no shock when the magnetic head hits the magnetic tape (and a stable head touch can be ensured).

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 15.

FIG. 1 is a perspective view showing the external appearance of a magnetic recording/reproducing apparatus 1 according to the present invention.

2 is a cassette; 5 is a magnetic tape; 4 and 5 are a capstan and a pinch roller that hold and run the magnetic tape 3;
6 is a pinch roller arm that presses the pinch roller 5 against the capstan 4; 7 and 8 are main magnetic poles and auxiliary magnetic poles (not shown) for recording and reproducing signals on the magnetic tape 5vc by the perpendicular magnetic recording method; W! It is a rotating disk that was used in battle. The rotating disks 7 and 8 are rotationally driven by a driving motor 10 about a rotating shaft 9, and perform rotational scanning on the magnetic tape 5.

Next, the set meal system of this embodiment will be explained from Figure 2 (α) and (h) VC.

In FIGS. 2(α) and (b), 11 is a main pole side magnetic head, and 12 is an S air pattern recorded on a 5vc magnetic tape.

As shown in FIGS. 2(α) and (A)K, the magnetic tape 5 is run in the direction of arrow A from the capstan 4 and the pinch roller 5vC, and is run in the direction of arrow B from the main magnetic head 11vC mounted on the rotating disk 71C. The magnetic pattern 12 is recorded on the magnetic tape 5 by rotational scanning.

5 and 4 are perspective views showing examples of the shape of the rotating disk 7 in this embodiment.

As shown in FIGS. 5 and 4, the rotating disk 7 on which the main magnetic pole side fH air head 11 is mounted has the shape of a fan blade,
The main pole side magnetic head 1 is located near the highest part in the direction of the rotation axis 9.
1 is installed, as the rotating disk rotates 70 times, when the main pole side magnetic head 11 is incident on the magnetic tape 5VC, the blade portion 7-α of the rotating disk gradually presses against the magnetic tape 5, and the main pole side magnetic head 11 gradually presses against the magnetic tape 5. The optimal crimping condition is achieved at the position of the magnetic head 11.

Therefore, there is no impact when the magnetic head hits the magnetic tape, and an optimal head touch can be obtained.

Further, as shown in FIG. 4, by making the rotary disk 7 itself into a blade shape, it is possible to simplify the purchase and reduce the cost.

Other embodiments of the present invention will be explained with reference to FIGS. 5 to 7.

In FIGS. 5(α) and 5(A), reference numeral 13 denotes an inclined guide for regulating the running attitude of the magnetic tape 5. In FIG.

As shown in FIG.
By twisting in the direction, a small gap is created at the position (5-α) where the main magnetic pole side S air head 11 enters the magnetic tape 5, and the impact at the time of entry can be alleviated.

Next, FIG. 6(α), Cb) is an example in which a guide roller 14 is used instead of the inclined guide 15 in FIGS. 5(α), (h). In this embodiment, since the guide roller 14 has a barrel-shaped cross section, the VC shown in FIG. 6 (12)
As shown in the figure, since the cross-sectional shape of the vCB&K tape 5 while running can be regulated, the main magnetic pole side A1K head 1 can be controlled as in the previous embodiment.
It is possible to reduce the impact when the magnetic head 1 is incident on the magnetic tape 5, and furthermore, it is possible to make the central part of the magnetic field in the direction vCffi of the main pole side magnetic head 11 project out, so that the radial touch can be stabilized.

Next, FIGS. 7(α) and (h) show the main pole side magnetic head 11.
This is an example in which a tape regulating member 15 for regulating the cross-sectional shape of the a-air tape 5 is provided facing the rotating disk 7&C on which the a-air tape 5 is mounted.

In this embodiment, since the tape regulating member 15 is installed at a position facing the main pole side magnetic head 11, the distance between the main pole side magnetic head 11 and the magnetic tape 5 can be controlled with higher accuracy than in the previous embodiment. can be regulated.

Furthermore, the main pole side magnetic head 11 is placed on the tape regulating member 15.
A more stable head touch can be obtained by providing a groove or the like (not shown) in the portion where the main pole side magnetic head Nvc passes and scanning the fB magnetic tape while pressing it in the direction of the groove.

Furthermore, other embodiments of the present invention are shown in FIGS. 8 to 10.

FIG. 8 is an exploded perspective view showing an embodiment of the present invention in which a cam surface is formed on the opposite magnetic pole side and the main pole side magnetic head 11 is moved in the axial direction of the rotary disk. Furthermore, FIGS. 9(α) and (S) are sectional views seen from the direction of arrow E in FIG. 8, respectively.

In FIG. 8, 16 is a cam surface formed on the disc 8 on the opposing magnetic pole side, and 17 is rotated in the direction of arrow B while contacting the cam surface 16, thereby positioning the main magnetic head 110 in the direction of the rotation axis 9. The magnetic head positioning member 18 is a leaf spring that presses the magnetic head positioning member 17 against the cam surface 16.

As shown in FIG.
The incident part (16-α) for the magnetic tape 5vc of No. 1 is higher (than the magnetic tape 5), and the output part (16-b) is lower (
It is formed. Therefore, at the position where the main pole side magnetic head 11 is separated from the magnetic tape 5 as shown in FIG. As shown in FIG. 3, while the main pole side magnetic head 11 is scanning the magnetic tape 5, the magnetic head positioning member 17 is off the cam surface 16, so the main pole side magnetic head 11 is pressed against the magnetic tape 5 by the leaf spring 1B. , optimal head touch can be obtained.

Furthermore, FIG. 10 is a side view of an embodiment in which a piezoelectric element is used to position the magnetic head in the direction of the rotating shaft 9 during scanning.

In FIG. 10, reference numeral 19 denotes a piezoelectric element for positioning the main pole side magnetic head in the direction of the rotation axis 9.

In this embodiment, as the rotating disk 7 rotates, when the main pole side magnetic head 11 is separated from the magnetic tape 5, the piezoelectric element 19 causes the main pole side magnetic head 11 to be forced to a position where it is floating above the magnetic tape 5. After the main pole side magnetic head 11 enters the magnetic tape 5, the piezoelectric element 19
As a result, the main magnetic pole side S air head 11 is moved in the direction of arrow F to a position where it contacts the magnetic tape 5VC, and is pressed by the leaf spring 18.

In this embodiment, a piezoelectric element is used, but a similar operation can be achieved using a renoid spring or the like.

Next, other embodiments of the present invention are shown in FIGS. 11 to 15.

11 and 12 show a rotating disk 7 equipped with a main magnetic head 11 and a rotating disk 8 equipped with an auxiliary magnetic head 21 connected by the same rotating shaft 9, and rotated by a drive motor 10. FIG. 3 is a perspective view and a cross-sectional view showing an example in which As shown in FIG. 12, the main pole side magnetic head 1
1 and the rotating disk 8 carrying the auxiliary magnetic head 20 are coaxially driven to rotate by the drive motor 10vc. The main pole side magnetic head 1
1 and the magnetic tape 5 held between the auxiliary pole side magnetic head 20 can be stably scanned.

Furthermore, a rotating disk 8 equipped with an auxiliary magnetic pole side magnetic head 20
A more stable head touch can be obtained by installing a pressure bonding pad or the like on the side.

Further, FIG. 15 shows that the rotating disk 7 on which the main magnetic head side magnetic head port is mounted and the rotating disk 8 on which the auxiliary magnetic head side magnetic head 2o is mounted are separately supported, and the rotating disk 7 is supported by an auxiliary drive member 21.
This is an example of transmitting the rotational force to the rotating disk 8. In this embodiment, the magnetic tape 3 can be run near the center of the rotating disk, and scanning can be performed almost linearly in the width direction of the magnetic tape 5, making it possible to realize highly efficient recording.

Further, the interval between the rotating disks 7 and 80 is changed to the main pole side magnetic head 11.
By narrowing the area near the area and widening it at the distance, the impact when the main pole side magnetic head 11 is incident on the magnetic tape 5 can be alleviated.

Next, another embodiment of the present invention will be described with reference to FIGS. 14 and 15. FIG. 14 is a perspective view of the rotary disk 7, and in this figure, reference numeral 22 denotes a suction plate that suctions the magnetic tape 5 to the magnetic head 11 on the positive pole side.

Further, FIG. 15 is an enlarged sectional view of the vicinity of the main magnetic pole side main air head in this embodiment.

As shown in FIG. 15, when the rotating disk 7 rotates in the direction of arrow B, the air between the magnetic tape 5 and the rotating disk 7 flows as shown at 26-α. Furthermore, the recessed part of the suction plate 22 (
At 22-α), when the airflow suddenly flows into a wide area like 25-b, the volume expands, so the air pressure decreases at the area 22-α, and the pressure force 24 acts on the magnetic tape 5, causing the main The magnetic pole side magnetic head 11vC magnetic tape 5 is pressed and a good head touch can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, when a magnetic tape is scanned by a rotating disk, the impact when the magnetic head enters the magnetic tape can be eliminated, stable rotational scanning can be achieved, and the performance of the apparatus can be improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the appearance of an apparatus according to an embodiment of the present invention, FIG. 2 is a side view illustrating the scanning method of the present invention, and FIGS. 5 and 4 are rotational views according to an embodiment of the present invention. Perspective views 5 to 7 (α) and (A) showing the shape of the disk are an outline view and a side view showing an embodiment in which the running posture of the magnetic tape is regulated, and FIG. 9 and 10 are side views, and FIG. 11 is a perspective view of the embodiment in which the rotary disks are driven to rotate coaxially.
FIG. 12 is a side view, FIG. 15 is a perspective view of an embodiment in which the rotating disks are not coaxial, FIG. 14 is a perspective view of a rotating disk showing another embodiment of the present invention, and FIG. 15 is a perspective view of an embodiment in which the rotating disks are not coaxial. Similarly, it is a sectional view of the vicinity of the magnetic head. 2... Cassette, 5... S staple, 7... Rotating disk, 11... Main magnetic pole side magnetic head, 15... Inclined guide, 14... Guide roller, 15... Tape regulation Members, 16...Cam surface, 17...Magnetic head positioning member, 19...Piezoelectric element, 20...Auxiliary magnetic pole side magnetic head, 22...Adsorption plate. 1 '''8 Patent Attorney Katsuo Ogawa (, 6 Kotobuki / Kuchi 2nd (α) Kukudukuni II 5th from the 4th country j, /j-ku (b) -a Kukutsukoku (ku) ) rb) II 7th Ward, ) (b) /7 7 ゝ・, 1 No. 72 Figure 730 1θ 74th Ward/7 75th Country

Claims (1)

[Claims] 1. In a magnetic recording and reproducing device comprising a magnetic head driving member equipped with a magnetic head and a recording medium scanned by the magnetic head to perform recording and reproducing, the magnetic head is located on a first surface of the recording medium. 1. A magnetic head abutment mechanism, characterized in that the magnetic head is configured to change a position and a distance of the magnetic head to the recording medium surface at a second position where the magnetic head is outside the recording medium.