JPS62222408A - Magnetic head - Google Patents

Abstract

PURPOSE:To prevent a shield plate from falling even when a sticking part between the shield plate and an elastic plate comes off, by fitting a bent piece cut and raised up from the elastic plate in the aperture part of the shield plate which encloses a slider sandwiching a magnetic core. CONSTITUTION:A V-formed bent part 14a provided at the upper end of the bent piece 14 of an elastic plate 9 is fitted in the aperture part 13a of a pair of sides facing oppositely of a shield plate 13. Keeping such state, the lower end of the shield plate 13 is fixed on the elastic plate 9, and a magnetic head 1 is fitted in the shield plate 13, and the shield plate is fixed on the elastic plate 9 setting so as to expand the bent piece 14 to the outside. Therefore, the shield plate and the elastic plate are formed in one body, so the shield plate is prevented from falling even when the sticking part comes off.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head, and more particularly to a magnetic head in which both sides of a magnetic core are held between sliders.

[Prior Art] As this type of magnetic head, a catamaran type magnetic head is often used, for example, in a magnetic disk device that records and reproduces information on both sides of a floppy disk, which is known as a flexible magnetic recording medium. Are known.

The conventional structure of this magnetic head will be explained with reference to FIGS. 5 and 6.

Figure 5 shows a pair of catamaran-type magnetic heads.
FIG. The reference numeral 9 in FIG. 5 is an elastic plate made of stainless steel or copper alloy, which is fixed to the tip of a support member provided on a magnetic helad carriage (not shown). A magnetic helad 1 is provided on the elastic plate 9.

Here, FIG. 5 shows the part of the magnetic head on the sliding surface (hereinafter simply referred to as sliding surface) side of the magnetic disk, and the illustration and description of the part provided on the opposite side of the elastic plate 9 will be omitted. .

The magnetic helad 1 has a recording/reproducing core 2 formed into a thin plate shape, and a magnetic gap 2a is formed on the upper end surface of the recording/reproducing core 2 facing the sliding surface, and a reinforcing plate is formed on both sides of the magnetic gap 2a. 10. It is sandwiched by 10.

Further, the reference numerals 3.3 and 3.3 respectively indicate erasing cores, which are similarly formed into thin plate shapes, with magnetic gaps 3a, 3a formed on the L end face facing the sliding surface, and reinforcing plates 11 and 3a formed between them. is held between the two. Erasing cores 3, 3 have their end faces reinforced with plate 1
It is provided in parallel with the recording/reproducing core 2 so as to be butted against the end face of 0.10 mm.

The above-mentioned recording/reproducing core and erasing core are held between sliders indicated by reference numeral 4.5. The slider 4.5 supports and reinforces the cores 2.3 on the elastic plate 9, and also allows the cores 2.3 to slide smoothly on a floppy disk (not shown). The slider 4.5 includes reinforcing plates 10.10 on both sides of the recording/reproducing core 2 and the erasing core 3.3.
It is fixed with adhesive so as to sandwich it.

The slider 4 on one side is formed into a rectangular thick plate shape and has a sliding surface 7 flush with both the cores 2 and 3. The other slider is formed in the shape of a rectangular parallelepiped block with a larger width than the slider 4, and similarly has a sliding surface 8 that is flush with both cores 2 and 3. 1 (46) is formed broadly parallel to the cores on the side closer to both cores 2.3 from the center. Therefore, when looking at the entire magnetic head 1 as a block, the recording/reproducing core 2 and the erasing core 3.3 are located in the center. It is located closer to one side than the other.

The magnetic head configured as shown in FIG. 5 performs recording and reproduction by pressing against the magnetic disk 12, which is a magnetic recording medium, from both sides as shown in FIG.

6 is the same magnetic head as in FIG. 5, and on the opposite side of the magnetic disk 12, a magnetic head 1' having exactly the same structure is placed on an elastic plate 9'. It is located. The magnetic head 1' is the magnetic head l
It has the same structure as , but the reference numerals of each part in the figure are distinguished by a dash.

As shown in the figure, the recording/reproducing cores and erasing cores of the recording disks 1 and 1' are arranged at positions shifted to the left and right from the center position, respectively, and a track width of A is secured on both the front and back sides of the magnetic disk 12. is configured to do so. While rotating the magnetic disk 12, the respective magnetic gaps of the recording/reproducing cores 2.2' and erasing cores 3, 3' of the magnetic head 1.1' are used to record tracks at different positions on both the upper and lower surfaces of the magnetic disk 12. Information can be recorded, reproduced, or erased by sliding contact.

Incidentally, some of the above-mentioned magnetic heads employ a structure in which the entire magnetic head is surrounded by a door closing plate 13 made of a magnetic material, as shown in FIG. 7, in order to provide magnetic shielding from external noise.

This door closing plate 13 is fixed to the elastic plate 9 with adhesive or the like.

[Problems to be Solved by the Invention] However, when the above-described structure is adopted, the door closing plate 13 is fixed with adhesive, so there is a problem that it may fall off due to aging, vibration, etc. Ta.

[Means for Solving the Problems] In order to solve the above-mentioned problems, in the present invention, an opening is provided in the shielding plate, and a bent piece fitted into the opening is inserted into the magnetic head. We adopted a structure that was formed by cutting and raising the elastic plate side to be fixed.

[Function] When the above structure is adopted, the door closing plate and the elastic plate are integrated through the bent piece, so even if the adhesive part of the door closing plate to the elastic plate comes off, the door closing plate remains elastic. It won't fall off the board.

[Example] The present invention will be described in detail below based on an example shown in one drawing. In addition, in each of the following examples.

Components that are the same as or correspond to those in FIGS. 5 to 7 are designated by the same reference numerals, and their explanations will be omitted.

[First Embodiment] FIGS. 1 and 2 illustrate a first embodiment of the present invention. In this embodiment, openings 13a are provided on a pair of opposing sides of the door closing plate 13. It is formed.

On the other hand, a bent piece 14 is cut and raised from both sides of the central part of the elastic plate 9, and a bent part 14a is formed at the upper end of the bent piece 14, which is bent inward in a V-shape. The bent portion 14a is fitted into the opening 13.

The bent portion 14a is fitted into the opening 13a by the bent piece 1.
As shown in FIG.

To assemble the magnetic head having the above-described structure, first, the door closing plate 13 is fitted to the elastic plate 9F while the bent pieces 14 are elastically deformed outward.

Then, the bent portion 14a is fitted into the opening 13a.

In this state, the lower end of the door closing plate 13 is glued onto the elastic plate 9.

Subsequently, the magnetic head l is fitted into the door closing plate 13, and the magnetic head l is fixed on the elastic plate 9 by slightly pushing the bent piece 14 outward.

This is because the present embodiment is configured as described above.

The door closing plate 13 and the elastic plate 9 are integrated through a bent piece 14, so that even if the adhesive part of the door closing plate to the elastic plate comes off,
This closing plate will not fall off.

[Second Embodiment] FIGS. 3 and 4 illustrate a second embodiment of the present invention. In this embodiment, the bending piece 14 has an inner edge at a right angle. A bent portion 14b is provided.

On the other hand, a projecting piece 13b is cut and raised outward from the lower edge side of the opening 13a of the door closing plate 13.

” - To assemble the magnetic head having the structure described above, first, with the bent pieces 14 and 14 pushed outward, the two bent pieces 1
4. Fit the door closing plate 13 between the openings 13 and 14, and fit the bent portion 14b into the opening 13a. At this time, the protruding piece 13b is pushed outward to create a gap between the upper end of the protruding piece 13b and the upper edge of the opening 13a, and the bent part 14b is inserted into the opening 13a.
After the protruding piece 13b is fitted into the inner part a, the protruding piece 13b is released.

Then, the protrusion 13b returns to its original position, and the bent portion 14b is pressed and fixed against the upper edge of the opening 13a.

In this state, the door closing plate 13 is fixed to the elastic plate 9 using an adhesive or the like.

Subsequently, the magnetic head 1 is fitted into the door closing plate 13 and fixed to the elastic plate 9.

Even if a double-connected structure is adopted, the same effect as in the embodiment described above can be obtained.

[Effects] As is clear from the above description, according to the present invention, a structure is adopted in which the bent piece that fits into the opening formed on the door closing plate side is cut and raised from the elastic plate side. Therefore, the door closing plate and the elastic plate can be integrated, and even if the bond between the door closing plate and the elastic plate comes off, the door closing plate will not fall off.

[Brief explanation of drawings]

1 and 2 are a perspective view and a longitudinal sectional side view of a magnetic head illustrating a first embodiment of the present invention, and FIGS. 3 and 4 are a magnetic head illustrating a second embodiment of the present invention. A perspective view and a vertical side view of the magnetic head, and FIGS. 5 to 7 explain the conventional structure. FIG. 5 is a perspective view of the magnetic head, FIG. 6 is a side view of the magnetic head in the recording and reproducing state, and FIG. FIG. 1 is a perspective view of the magnetic head with a closing plate attached. ■...Magnetic head 2...Recording/reproducing core 3...
- Erasing core 4.5...Slider 9...Elastic plate 13...Door closing plate 13a...Opening part
14...Bending pieces 14a, 14b--Bending portion

Claims (1)

[Claims] In a magnetic head that has a slider that holds a magnetic core from both sides and is fixed on an elastic plate while being surrounded by a shielding plate, an opening is provided in the shielding plate so that the magnetic core can be viewed from the elastic plate side. A magnetic head characterized in that a bent piece having a bent part fitted into an opening is cut and raised.