JPH0710859U - Magnetic head - Google Patents

Abstract

(57) [Abstract] [Purpose] A pair of sliders that compose the magnetic head sandwiching both sides of the head core are formed symmetrically, and concave air grooves that the medium does not contact are formed on both sides of the head core on the slider where the medium slides. This is to obtain a magnetic head formed. A magnetic head, which is provided in a drive device into which a medium such as a floppy disk is inserted, and has an upper end portion of a head core sandwiched by a pair of sliders, the pair of sliders 1 constituting 12 of the magnetic head.
3 is formed symmetrically, and the medium 2 of the slider 13 is formed.
The slide surface 13a and the cutout portion 13b that does not contact the medium 2 are equally formed on the upper surface of the side, and the escape portion 13c such as a coil bobbin is formed inside the slider 13 and below the cutout portion 13b. When both sides of the head core 9 are sandwiched by the sliders 13 and 13, the concave air groove 1 in which the medium 2 does not contact both sides of the head core 9 at the upper end of the slider
4 is formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic head installed in a floppy disk drive device in electronic devices such as personal computers and word processors.

[0002]

[Prior art]

 In general, a drive device into which a medium such as a floppy disk is inserted is installed inside the main body of an electronic device such as a personal computer or a word processor, and a magnetic head provided in the head portion of this drive device Information can be recorded on the media, and the recorded information can be played / erased.

That is, as shown in FIG. 3, a drive device installed in a conventional electronic device body records information on both sides of a medium 2 such as a floppy disk inserted in the drive device, A head unit 1 for reproducing / erasing recorded information is provided. In the head portion 1, the rear portion of the upper head carriage 3 is connected to the rear portion of the lower head carriage 4 by a leaf spring 5, and the tip portion of the upper head carriage 3 can be opened and closed vertically.

Further, the upper surface of the upper head carriage 3 is pressed by one hook 6 a of the torsion spring 6 and is constantly pressed downward. Moreover, the upper head carriage 3 and the lower head carriage 4 are also pressed. Magnetic heads 8 and 8 constituting an upper head and a lower head are elastically held at positions opposite to the tip end portions of the magnetic heads 8 and 9 via plate gimbal plates 7 and 7, respectively. Here, the magnetic heads 8 and 8 are the same in the upper and lower parts, and both ends of a head core 9 made of ceramic or the like are sandwiched by upper portions of sliders 10 and 11 made of a highly wear-resistant ferrite or the like and integrally formed. It is fixed, and the sliding surface of the medium 2 is polished to a smooth mirror surface.

Further, one slider 10 holding the head core 9 has a sliding surface which is in contact with the medium 2 wider than the sliding surface of the other slider 11, so that one side of the head core 9 has a magnetic surface. An air groove 10b is formed on the upper surface of the slider 10 located at the center of the sliding width D of the head 8 to prevent the magnetic head 8 from adsorbing to the surface of the medium 2. In addition, inside the sliders 10 and 11, on the head core 9 side, relief portions 10a and 11a such as coil bobbins that are assembled to the head core 9 are formed.

On the other hand, the upper and lower head carriages 3 and 4 of the drive device are attached to the front end portions of the magnetic heads 8 and 8 in such a manner that the center lines P of the sliding widths D of the magnetic heads 8 and 8 coincide with each other. . The head core 9 of the magnetic head 8 attached to the upper head carriage 3 is located inside the medium 2 with respect to the center line P of the sliding width D, and the magnetic head 8 attached to the lower head carriage 4 is The head core 9 is located outside the media 2 with respect to the center line P, and a predetermined track width Tr (for example, 8 tracks) is held between the head cores 9, 9 of the magnetic heads 8, 8.

[0007]

[Problems to be solved by the device]

 However, in the magnetic head 8 having the above-described conventional structure, the sliders 10 and 11 are formed of a ceramic material or titanate valium, so that the material cost is high, and the molds of the sliders 10 and 11 are different. There was a problem that the cost and the processing man-hour increased and the cost increased. In addition, since the sliding surface area between the magnetic head 8 and the medium 2 is large and the static friction force is large, stable rotation of the medium cannot be obtained and uneven rotation occurs. There were problems such as not being able to obtain a playback function, and increasing the motor's starting torque and power consumption to increase the size and cost of the motor.

An object of the present invention is to solve the above-mentioned problems of the conventional structure. A pair of sliders forming a magnetic head by sandwiching both sides of a head core are formed symmetrically so that a medium slides. The purpose is to obtain a magnetic head in which concave air grooves are formed on the upper surface of the moving slider on both sides of the head core so that the medium does not come into contact.

[0009]

[Means for Solving the Problems]

 In order to achieve such an object, the magnetic head according to the present invention is provided in a drive device into which a medium such as a floppy disk is inserted, and the magnetic head is formed by sandwiching both upper end portions of a head core with a pair of sliders. A pair of sliders that compose the magnetic head are formed symmetrically, and a notch that does not come into contact with the sliding surface is equally formed on the upper surface of the slider on the media side. A relief part such as a coil bobbin is formed on the lower side of the notch, and when both sides of the head core are sandwiched by the pair of sliders, concave air grooves are formed on both sides of the head core at the upper end of the slider to prevent media contact. It is characterized by that.

[0010]

[Action]

 Based on such a configuration, in the magnetic head according to the present invention, a pair of sliders forming the magnetic head by sandwiching both sides of the head core are formed symmetrically, so that only one slider mold is required, and the slider It is possible to reduce the shape, and material cost, die cost, and processing man-hours are reduced, and the cost can be reduced. In addition, since concave air grooves that the media do not touch are formed on both sides of the head core on the top surface of the slider where the media slide, the sliding area between the magnetic head and the media is reduced, the static friction force is reduced, and the rotation of the media is reduced. A stable recording / playback function can be obtained with a stable magnetic head, and the starting torque and power consumption of the drive motor can be reduced. Therefore, the overall size of the motor and drive device can be reduced, resulting in a significant cost reduction. You can

[0011]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a cross-sectional view of an essential part showing a configuration of a magnetic head according to an embodiment of the present invention, and FIG. 2 is an essential part showing a state in which the magnetic head according to the present invention is attached to a lower head carriage of a drive device. It is a perspective view, in which the same parts corresponding to the conventional magnetic head are denoted by the same reference numerals, and a part of the description is omitted.

The magnetic head 12 provided in the drive device includes a head core 9 formed of ceramic or the like, and a pair of sliders 13 and 13 formed of ferrite or the like and the upper end portion of the head core 9 is sandwiched from both sides. , A coil bobbin (not shown) mounted on the head core 9, and the like.

When the slider 13 of the magnetic head 12 is molded, a sliding surface 13a is provided on one half of the upper surface facing the medium 2 and the opposite side of the sliding surface 13a is connected to the head core 9 side. Has a notch 13b that does not contact the medium 2. Further, a clearance portion 13c such as a coil bobbin mounted on the head core 9 is formed inside the slider 13 and below the cutout portion 13b. Here, by forming the sliding surface 13a of the slider 13 to a necessary minimum, the entire width of the slider 13 can be formed small.

The magnetic head 12 is sandwiched by a pair of sliders 13 and 13 on both sides of the upper end portion of the head core 9 via a glass gap material (not shown) so as to be integrally fixed and contact the medium 2. The sliding surfaces 13a, 13a and the upper end surface of the head core 9 are formed by polishing a smooth mirror surface.

The magnetic head 12 configured as described above has a symmetrical shape on both sides with respect to the head core 9, and the head core 9 and the cutouts 13 c of the sliders 13 adjacent on both sides cause the head core 9 to move. Concave air grooves 14, 14 are formed on both sides to prevent the sliding surfaces 13a, 13a of the magnetic head 12 from adhering to the surface of the rotating medium 2.

Therefore, when the magnetic head 12 is mounted on the drive device, a predetermined track width is provided between the head cores 9, 9 of the magnetic heads 12 mounted on the upper and lower head carriages 3 and 4 so that the upper and lower magnetic force lines do not interfere with each other. It is attached so as to be unevenly distributed so that the Tr is retained. Further, in the magnetic head 12, since the width of the sliding surface 13a in which the slider 13 contacts the surface of the medium 2 is made small, the contact area between the sliding surface of the magnetic head 12 and the medium surface can be reduced.

[0018]

[Effect of device]

 As described in detail above, according to the present invention, a magnetic head is formed by sandwiching both sides of the upper end of a head core with a pair of sliders, and the pair of sliders forming the magnetic head are formed symmetrically. A notch that does not contact the sliding surface and the media is equally formed on the upper surface of the slider on the media side, and a clearance such as a coil bobbin is formed on the inside of the slider below the notch. When both sides of the head core are sandwiched by, the concave air groove that does not contact the media is formed on both sides of the head core at the upper end of the slider.Therefore, only one slider mold is required and the total width of the slider should be small. It is possible to reduce the material cost, die cost, and processing man-hours. In addition, a concave air groove is formed on both sides of the head core at the upper end of the slider where the medium slides so that the medium does not come into contact, and a predetermined track width is maintained between the head cores of the upper and lower magnetic heads. The area is reduced, the static friction force is reduced, the rotation of the media is stable, and the magnetic head provides a highly accurate recording / reproducing function, and the starting torque and power consumption of the drive motor can be reduced. The entire drive device can be downsized.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part showing a configuration of a magnetic head according to an embodiment of the present invention.

FIG. 2 is a perspective view of essential parts showing a state in which a magnetic head according to the present invention is attached to a lower head carriage of a drive device.

FIG. 3 is a cross-sectional view of a main part showing a structure of a head part installed in a conventional floppy disk drive device.

3 is a cross-sectional view showing the structure of the magnetic head in FIG.

[Explanation of symbols]

 2 media 9 head core 12 magnetic head 13 slider 13a sliding surface 13b notch portion 13c escape portion 14 concave air groove

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[Procedure amendment]

[Submission date] January 17, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a sectional view of a main part showing a configuration of a magnetic head according to an embodiment of the present invention.

FIG. 2 is a perspective view of essential parts showing a state in which a magnetic head according to the present invention is attached to a lower head carriage of a drive device.

FIG. 3 is a cross-sectional view of a main part showing a structure of a head part installed in a conventional floppy disk drive device.

FIG. 4 is a cross-sectional view showing the structure of the magnetic head in FIG.

[Explanation of Codes] 2 Media 9 Head Core 12 Magnetic Head 13 Slider 13a Sliding Surface 13b Notch 13c Relief 14 Concave Air Groove

Claims (1)

[Scope of utility model registration request] 1. A magnetic head which is provided in a drive device into which a medium such as a floppy disk is inserted and which holds both upper end portions of a head core by a pair of sliders, the pair of sliders constituting the magnetic head. Are formed symmetrically, and the slide surface and the cutout that does not contact the media are equally formed on the media-side upper surface of the slider, and a relief part such as a coil bobbin is formed inside the slider below the cutout. Then, when both sides of the head core are sandwiched by the pair of sliders, a concave air groove that does not come into contact with the medium is formed on both sides of the head core at the upper end of the slider.