JPS6233380A - Head abutting mechanism for magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To simplify a structure and make the size compact by sucking a magnetic disk to a magnetic head by a negative pressure generated in a gradation part during a high speed rotation of the magnetic disk. CONSTITUTION:When a floppy disk 2 is rotated at high speed in the direction shown by an arrow A, air in the vicinity of a surface of the floppy disk 2 flows in the same direction together therewith. However, since there is a stepped part 8b of a slider 8 at an upstream side of an air stream, the stepped part 8b becomes a weir and the flow is throttled. As a result, an upper surface of a gradation part 8a at a downstream side of the stepped part 8b has a negative pressure, the floppy disk 2 having flexibility is sucked to the gradation part 8a by this negative pressure and pressed to a magnetic head 7. This contact of the floppy disk 2 and the magnetic head 7 is maintained while the floppy disk 2 is rotated at high speed. Thereby, a pad for pressing a magnetic disk to the magnetic head can be omitted and the structure can be simplified and made compact.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetic recording and reproducing device that is required to be miniaturized, such as a still video 70-tube device installed in an electronic still camera, and particularly relates to a magnetic recording and reproducing device that is required to be miniaturized, such as a still video 70TV device installed in an electronic still camera. Regarding the contact mechanism with.

[Background of the invention]

Conventionally, this type of magnetic recording and reproducing device has been described in "Technical Report of the Television Society" (published December 13, 1980), P2
N2. As introduced in , by placing a magnetic head and a pad facing each other with a floppy disk (magnetic disk) in between, and pressing the pad toward the magnetic head, the desired contact pressure can be applied between the magnetic head and the floppy disk. A head abutment mechanism is adopted that causes the occurrence of

However, in such a conventional example, the structure for moving the pad in the direction of the magnetic head is complicated, and a space is required for the pad to move, which makes it difficult to miniaturize. Ta.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic recording/reproducing device which has a simple structure and can be miniaturized, eliminating the drawbacks of the prior art described above.

[Summary of the invention]

The present invention utilizes airflow generated when a magnetic disk rotates in place of a conventional band, and includes a slider having a stepped portion and a stepped portion that is a minute distance higher than the stepped portion. A magnetic head 1 is disposed within the stepped portion of the slider, and the stepped portion is disposed on the upstream side in the rotational direction of the magnetic disk, and the negative pressure generated in the stepped portion when the magnetic disk rotates at high speed , is characterized in that the magnetic disk is configured to be attracted to the magnetic head.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

Figures Wc1 to 6 relate to an embodiment of the present invention, where Figure 1 is a perspective view of the main parts, Figure 2 is a perspective view of the magnetic head and slider, and Figure 5 is a running magnetic disk and magnetic head. In FIG. 1, which is an explanatory diagram showing the relationship between The U-shaped shutter 3 is slidable.
This is fitted. The shutter 3 can be freely opened and closed by coming into contact with a shutter opening/closing mechanism (not shown) attached to the magnetic recording/reproducing device, and when the shutter is opened, a window of the floppy disk 211-i cartridge case 1 is opened. It is exposed through the hole 1a. Also,
A plurality of positioning holes 1b are formed at predetermined positions in the cartridge case 1.

On the other hand, in the predetermined position of the chassis 4, there is an f-fixing hole 1b.
A plurality of positioning bins 5 are installed corresponding to the
A rotor 6 is provided in the central portion of the chassis 4 and is connected to a drive motor (not shown). Furthermore, a slider 8 on which a magnetic head 7 is mounted is provided on the chassis 4 so as to be movable back and forth in the direction of the rotor 6. As shown in FIG. 2, this slider 8 has a stepped portion 8a formed by a flat surface and a stepped portion 8b protruding from the periphery of the stepped portion 8a in a three-dimensional shape, The magnetic head 7 is integrated with the slider 8 so that its gap portion slightly protrudes beyond the stepped portion 8a. and,
The slider 8 has the stepped portion 8b on the upstream side in the rotational direction of the floppy disk 2 (indicated by arrow A in FIG. 1).
However, when the cartridge case 1 is inserted into the apparatus, the shutter opening/closing mechanism opens the shutter 3. is opened and the floppy disk 2 is exposed through the window hole 1&, and the cartridge case 1 is positioned at a predetermined position by each positioning pin 5 and positioning hole 1b, and the center hub 2a of the 70-tube disk 2 is fitted into the rotor 6. It will be worn.

When the rotor 6 is rotated by a drive motor (not shown) in this state, the floppy disk 1 rotates at high speed in the direction shown by arrow A in the drawing @1, and comes into contact with the floppy disk 2 exposed through the window hole 1a. Electric signals are exchanged with the magnetic head 7.

FIG. 3 explains the state of contact between the 70-tip disk 2 and the magnetic head 7 at this time. As shown in the figure, when the floppy disk 2 rotates at high speed in the direction of arrow A, The air near the surface of the floppy disk 2 flows in the same direction. However, in the case where the stepped portion 8b of the slider 8 is located on the upstream side of this air flow, the stepped portion 8b acts as a barrier and the flow is restricted, and as a result, the air flow is Therefore, the flexible floppy disk 2 is attracted to the stepped portion 8a by the negative pressure, and the magnetic head 7 provided at the stepped portion 8aζ The contact between the floppy disk 2 and the magnetic head 7 is maintained while the 70-bit disk 2 is rotating at high speed.

In the above embodiment, the magnetic head 7 is provided integrally with the slider 8, and the magnetic head 7 is transferred in the radial direction of the floppy disk 2 by the movement of the slider 8. However, as shown in FIG. Alternatively, it is also possible to fix the slider 8 to the chassis 4 so that only the magnetic head 7 moves within the elongated hole 8C formed in the slider 8.

〔Effect of the invention〕

As explained above, according to the present invention, the contact state between the magnetic disk and the magnetic head is maintained by utilizing the negative pressure generated at the stepped portion of the slider when the magnetic disk rotates at high speed. The pad required for pressing the magnetic disk against the magnetic head can be omitted, and a magnetic recording/reproducing device with a simple structure and miniaturization can therefore be provided.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the main parts of a magnetic recording and reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view of a magnetic head and a slider provided in the magnetic recording and reproducing apparatus, and FIG. FIG. 4 is an explanatory view showing a state of contact between a running magnetic disk and a magnetic head in the magnetic recording and reproducing apparatus shown in the figure, and FIG. 4 is a perspective view showing the main parts of a magnetic recording and reproducing apparatus according to another embodiment of the present invention. It is. 1... Cartridge case 1a... Window hole 2... Floppy disk (magnetic disk) 2a...
・Center hub 3...Shutter 4...Chassis
6...Rotor 7...Magnetic head 8...
・Slider 8a...Stepped part 8b...Stepped part 8c...Elongated hole 7~゛・

Claims (1)

[Claims] In a magnetic recording and reproducing device that includes a magnetic head and a flexible magnetic disk and performs recording and reproducing by moving the magnetic head in a semi-longitudinal direction of the magnetic disk that rotates at high speed, A slider is provided with a stepped portion that is higher than the stepped portion by a minute distance, the magnetic head is disposed within the stepped portion of the slider, and the stepped portion is positioned upstream in the rotational direction of the magnetic disk. A head part of a magnetic recording and reproducing apparatus, characterized in that the head part of the magnetic recording and reproducing apparatus is arranged on the side of the magnetic disk and is configured such that the magnetic disk is attracted to the magnetic head by negative pressure generated in the stepped part when the magnetic disk rotates at high speed. Contact mechanism.