JP2780278B2 - Magnetic head - Google Patents

Description

The present invention relates to a method for reading data from a magnetic recording medium,
The present invention relates to a magnetic head used in a magnetic recording / reproducing apparatus for writing data on a magnetic recording medium.

2. Description of the Related Art FIGS. 3, 4 and 5 show a conventional magnetic head. 3, 4 and 5, reference numeral 1 denotes an L-shaped recording / reproducing core, 2 denotes an I-shaped common core, and a common core 2 joins magnetic bars 3 and 4 via a non-magnetic material 5. The configuration is as follows. Reference numeral 6 denotes an L-shaped erase core. The recording / reproducing core 1 and the magnetic bar 3 are joined via a non-magnetic material such as glass, and a recording / reproducing gap 7 is formed. The erase core 6 and the magnetic bar 4 are also joined via a non-magnetic material such as glass, and an erase gap 6 is formed. A recording / reproducing core 1, a common core 2, and an erase core 6 form a core chip 9. Reference numeral 10 denotes a slider attached to both side surfaces of the core chip 9, 11 denotes a bobbin provided with windings and provided with flanges at both ends, and the bobbin 11 is inserted into the recording / reproducing core 1. Reference numeral 12 denotes a bobbin provided with a winding and provided with flanges at both ends, and the bobbin 12 is inserted into the erase core 6. Reference numeral 13 denotes a back bar, and the back bar 13 has a configuration in which the magnetic bars 14 and 15 are joined via a non-magnetic body 16, and the non-magnetic body 16 and the non-magnetic body 5 are overlapped to form the back bar 13. The rear end of the core chip 9 is bonded with an epoxy resin 17 or the like. At this time, the magnetic bar 14 bridges the rear ends of the recording / reproducing core 1 and the magnetic bar 3 to form a magnetic circuit on the recording / reproducing side. The magnetic bar 15 bridges the erase core 6 and the rear end of the magnetic bar 4 to form a magnetic circuit on the erase side.

A method of attaching the back bar of the conventional magnetic head configured as described above will be described.

First, the back bar 13 is brought into contact with the rear end of the core chip 9 so that the non-magnetic member 5 and the non-magnetic member 16 overlap with each other.
Hold the 13 and the core chip with a jig and fix them. Next, the epoxy resin 17 is spread over the back bar 13 and each core (recording / reproducing core 1, common core 2, and erase core 6).
Is applied. Then, the jig is kept sandwiched until the epoxy resin 17 is cured.

Problems to be Solved by the Invention However, in the above-described conventional configuration, the epoxy resin 17 must be sandwiched by a jig until the epoxy resin 17 is hardened, so that there is a problem that workability is poor and productivity is low.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a magnetic head which can improve workability when attaching a back bar and has high productivity.

Means for Solving the Problems In order to achieve this object, a rib having a U-shaped cross section is formed on a half of a peripheral portion of the collar on a flange opposite to the medium facing surface of the bobbin. An elastic member is interposed between the core bar and the back bar, and the back bar is pressed against the core chip by the elastic member.

Operation With this configuration, the back bar and the core chip can be held until the epoxy resin is cured without using a jig.

Embodiment FIGS. 1 and 2 are views showing a magnetic head according to an embodiment of the present invention. 1 and 2, 1 is a recording / reproducing core, 2 is a common core, 3 and 4 are magnetic bars, 5 is a non-magnetic material, 6 is an erase core, 7 is a recording / reproducing gap, 8 is an erasing gap, 9 Is the core chip, 10 is the slider, 13
Is a back bar, 14 and 15 are magnetic bars, 16 is a nonmagnetic material 17 is an epoxy resin, and these are the same as the conventional configuration. Reference numeral 18 denotes a bobbin with a winding, and the bobbin 18 has flanges 18 at both ends.
a and 18b are provided respectively. A rib 18c is provided over a half of the peripheral edge of the brim 18a. Bobbin 18
Is mounted on the recording / reproducing core 1 and the erase core 6 such that the open portions of the ribs 18c face each other. Reference numeral 19 denotes a leaf spring provided between the back bar 13 and a rib 18c provided on the bobbin 18 inserted into the recording / reproducing core 1 and the erase core 6, and the leaf spring 19 presses the back bar 13 against the core chip 9. . Both ends of the leaf spring 19 are in contact with the ribs 18c of the bobbins 18 inserted into the respective cores.
Has a central part in contact with the back bar 13. Reference numeral 20 denotes an epoxy resin for mounting the back bar 13 and the core chip 9.

A method of attaching the back bar 13 of the magnetic head according to the embodiment of the present invention configured as described above will be described.
First, the bobbin 18 is inserted into the recording / reproducing core 1 and the erase core 6 such that the open portions of the ribs 18c face each other.
Next, the non-magnetic material 16 provided on the back bar 13 and the common core 2
Core chip 9 so that non-magnetic material 5 provided in
The back bar 13 is disposed on the core chip 9 by contacting both ends of the leaf spring 19 with the inner wall of each rib 18c and contacting the center of the leaf spring 19 with the back bar 13. Press. Finally, the back bar 13 is bonded to the core chip 9 with an epoxy resin 20.

As described above, according to the present embodiment, the back bar 13 and the rib 18
c, the back bar 13 is brought into contact with the core chip 9 by the leaf spring 19, and is held by the jig or the like until the epoxy resin 20 is cured.
Therefore, it is not necessary to sandwich the core chip 9 and the workability, so that workability can be improved and productivity can be improved.

Advantageous Effects of the Invention The present invention is to form a rib having a U-shaped cross section over a half circumferential portion of the periphery of the brim on the brim opposite to the medium facing surface side of the bobbin, and to provide an elastic member between the rib and the back bar. When the bobbin is inserted by simply pressing the back bar against the core chip with the elastic member, it is sufficient to simply insert the bobbin with the side having the rib on the outer peripheral side and insert the bobbin. The process is simplified, it is easy to respond to mechanization, etc. In addition, the back bar and core chip can be held until the epoxy resin is cured without using a jig, so workability is improved and productivity is improved. Can be.

[Brief description of the drawings]

1 is a partial perspective view showing a magnetic head according to an embodiment of the present invention, FIG. 2 is a bottom plan view of the same, FIG. 3 is a partial perspective view showing a conventional magnetic head, and FIG. FIG. 5 is a front view of the same. 1 ... Recording / reproducing core 2 ... Common core 3,4 ... Magnetic bar 5 ... Non-magnetic material 6 ... Erase core 7 ... Recording / reproducing gap 8 ... Erase gap 9 ... Core chip 10 ... Slider 13 ... … Back bar 14,15… Magnetic bar 16… Non-magnetic material 18… Bobbins 18a, 18b… Brim 18c… Rib 19… Leaf spring 20… Epoxy resin.

Claims (1)

(57) [Claims] 1. A core chip in which a first core having a gap for recording and reproduction and a second core having a gap for erasing are joined via a non-magnetic material, and attached to both side surfaces of the core chip. The slider, the bobbin attached to the first core and the second core, and wound, and the core chip so that the first core and the second core form a closed magnetic path. A back bar connected to the rear end portion is provided, a flange is provided on the side opposite to the medium facing surface side of the bobbin, and a rib having a U-shaped cross section is formed over a half circumferential portion of a peripheral edge of the brim, A magnetic head, wherein an elastic member is interposed between the rib and the back bar, and the back bar is pressed against the core chip by the elastic member.