JPH0320909Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a magnetic head used in a floppy disk drive device.

``Prior Art'' Magnetic heads for floppy disk drives generally consist of a ceramic slider and a ferrite core, and the two are assembled and used by bonding with a bonding agent such as glass or epoxy resin. ing.

By the way, this type of magnetic head has traditionally been
Depending on the shape of the core.

Broadly divided into tunnel race type, straddle erase type, and bulk type. In the tunnel race type, the core is laminated with ceramic sandwiched between both sides and fixed with epoxy resin or glass, and in the straddle erase type, the ceramic and core are fixed mainly with glass.

The current main types are the tunnel race type or straddle erase type, but the bulk type has recently begun to be used more often for microfloppy devices. This is due to the increase in recording density.
It is necessary to reduce the width of the lead light gap of the core, a trend that arose from the viewpoint of core strength and workability.

Tunnel race type and straddle race type
For both types, at least three pieces for the core and at least one piece for the slider must be arranged and connected, and it takes a long time to assemble them with good dimensional accuracy.

Bulk type cores have a one-piece core, but the slider has two pieces, and the mainstream is to laminate and connect the core with sliders from both sides, which also requires some time during assembly. it takes time.

The easiest method is to assemble the slider and core as one piece, but in the conventional method, as shown in Figures 4 to 6, the slider 101 has a width
Width 0.2 to 0.5 to insert core 102 of about 0.2 to 0.4 mm
A long hole (slot) 103 of about mm is drilled and the core 102 is completely separated from the hole wall of the long hole 103, and a jig is used to position the core 102 inside the long hole 103. It is assembled using extremely thin shims, and due to its small dimensions, it requires time to assemble under a magnifying glass.

``Problems to be solved by the invention'' It takes a long time to accurately assemble and connect the slider and core of a magnetic head.

"Means for solving the problem" A positioning step is formed at both ends of one long side of the elongated hole, and the top surface of both ends of the core is removed longer than the length of the step to form a binding agent filling section. This is what I did.

Embodiment As shown in FIGS. 1 to 3, a rectangular long hole 2 is cut into a ceramic slider 1.
The core 3 made of ferrite is formed to have a rectangular cross section so that it can be inserted into the elongated hole 2 at a predetermined distance.

A right-angled stepped portion 6 is formed at both ends of one long side of the elongated hole 2, and includes a long side plunge wall 4 and a short side plunge wall 5, which are parallel to the hole wall. Core 3 inside long hole 2
The position of is determined by the plunge lengths a and b of the long-side plunge wall 4 and the short-side plunge wall 5. That is, the plunge length a of the long side plunge wall 4 determines the longitudinal position of the core 3 in the long hole 2, and the plunge length b of the short side plunge wall 5 determines the left and right position of the core 3 in the long hole 2. Determine the position of the direction. These plunge lengths a and b are between the front and rear, right and left sides of the hole wall of the elongated hole 2 of the slider 1 and the core 3〓C1.
Set C2 to be equal.

In addition, since the length L of the long side plunge wall 4 comes into contact with the end of the core 3, in order to prevent the core 3 and the slider 1 from coming into direct contact on the surface of the magnetic head, the top surface of both ends of the core 3 is is longer than the length L of the long side plunge wall 4 and is cut into a square chamfer 7 shape, and bonded with glass or epoxy resin, etc.
A filling portion 8 for the agent is formed.

Inside the elongated hole 2 of the slider 1, both ends of the core 3 are brought into contact with the stepped portion 6, and a bonding agent 9 is applied between the hole wall of the elongated hole 2 and the core 3 (C1, C2 and the filling part 8). Fill, solidify and bond.

"Effects of the Invention" As mentioned above, the present invention is a magnetic head in which a core is arranged in a long hole of a slider and bonded with a binder interposed over the entire circumference, and one of the long sides of the long hole is This is a magnetic head in which a positioning step is formed at both ends, and the upper surface of both ends of the core is removed longer than the length of the step to form a binder-filled part. Since it is only necessary to contact the stepped portion, the assembly time can be reduced to 1/5 to 1/10 compared to the conventional method that uses shims. In addition, by making the core a bulk core and making it into one piece, and making the slider into one piece to simplify it, the assembly time can be shortened. Furthermore, the slider can be made into one piece and the shape of the elongated hole can be easily formed by press molding.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a specific embodiment of the present invention, Fig. 2 is a side view of Fig. 1, Fig. 3 is a vertical sectional view of the main part of Fig. 1, and Fig. 4 is a conventional magnetic head. plan view of
5 is a side view of FIG. 4, and FIG. 6 is an enlarged plan view of the main part of FIG. 4. 1...Slider, 2...Long hole, 3...Core,
9...Binder, 6...Positioning step, 8...Filling part.

Claims (1)

[Scope of utility model registration request] A magnetic head in which a core is placed in a long hole of a slider and bonded to each other by interposing a binder over the entire circumference, and a positioning step is formed at both ends of one long side of the long hole, and the upper surface of both ends of the core is A magnetic head characterized in that a portion filled with a binder is formed by removing a portion longer than the length of the stepped portion.