JPS62139108A - Forming device for tape sliding surface of magnetic head - Google Patents

Abstract

PURPOSE:To improve operability and productivity by providing a means which drives and controls a supporting mechanism in the tape width direction, with a head tip abutted on a wrapping tape. CONSTITUTION:Plural head tips 14 are attachably detachably fitted on the supporting mechanism 13 through a fixed member 15 corresponding to plural sets of poles 11a and 11a. A tape sliding surface forming device disposes plural head tips 14 abutted on the wrapping tape 10 at the prescribed interval on the supporting mechanism 13, which is continuously moved and controlled in the tape surface direction. Then the abutting amount (t) of the head tips 14 is adjusted. And the head tips 14 are so constituted to reciprocatingly move in the tape width direction, and their plural tape sliding surfaces can be simultaneously formed. Thus high quality products can be automatically mass-produced without any troublesome operation, and their productivity and reliability can be improved as much as possible.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a magnetic head used in, for example, a video tape recorder, a floppy disk drive device, etc.
In particular, the present invention relates to the tape sliding surface forming device.

[Technical Background of the Invention and its Problems] Conventionally, this type of tape sliding surface forming apparatus has been designed to connect an endless wrapping tape 1 to a wrapping ball via a tape running mechanism 2, as shown in FIG. The head chip 5 attached to the support structure 3 using the fixing member 4 is brought into contact with the wrapping tape 1 between the poles 2a by a predetermined amount for a predetermined time. There are known tapes that are configured to grind by bringing them into contact with each other to form a desired tape sliding surface. Note that the support structure 3 is also moved in the width direction (vertical direction) of the tape 1 by a mechanism not shown, and the head chip 5 is also ground in the thickness direction of the chip 5.

However, in the tape sliding surface forming device described above, due to the spacing between the poles 2a, the wrapping tape 1 comes into contact with the tip of the head chip 5 only in a narrow range, as shown in FIG. 9(a). Therefore, for example, when the amount of contact of the head chip 5 is increased, the curvature becomes smaller as shown in FIG. Therefore, in order to grind the entire area to obtain the desired curvature, the desired tape sliding surface cannot be obtained unless the grinding is performed while adjusting the contact of the head tip 5 in three or more stages. . Therefore, the work is extremely troublesome and takes a lot of time.

Moreover, according to this, the amount of contact of the head chip 5 must be adjusted in multiple steps, which may cause a stepped portion to be formed on the tape sliding surface as shown in FIG. Ori,
There was also the problem that the reliability of the product was poor.

For this purpose, as shown in FIG. 10, two to three head chips 1 are attached to a rotatable body 6 at a predetermined interval, and a wrapping tape is placed around the head chips 5 of the rotary body 6. 1 is wound around the wrapping tape 1 and the rotating body 6 is driven to rotate at a low speed while the wrapping tape 1 runs, thereby making it possible to easily form a desired tape sliding surface.

However, in the above-mentioned tape sliding surface forming device, the amount of contact of the head chip 5 and the wrapping of the wrapping tape 1 are limited by the diameter of the rotating body 6 due to the relationship with the angle. Therefore, since there is a restriction on the number of head chips 5 to be attached, there has been a problem in that it is difficult to commercialize the head chips as required in recent years. Moreover, according to this, there is also a problem that adjustment work including positioning is extremely troublesome and complicated due to its configuration.

[Purpose of the Invention] This invention has been made in view of the above circumstances, and is designed to have a simple configuration, improve workability as much as possible, and improve productivity as much as possible. An object of the present invention is to provide a tape vibrating surface forming device for a magnetic head.

[Summary of the invention]

That is, the present invention arranges a plurality of head chips that are in contact with the wrapping tape with respect to a support structure at predetermined intervals, and controls the movement of this support structure in the tape surface direction to adjust the amount of contact of the head chips. At the same time, by configuring the head chip to be driven and controlled in the tape width direction as well,
The intended purpose is achieved by making it possible to simultaneously form tape sliding surfaces on a plurality of head chips.

“Embodiments of the Invention” Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a tape sliding surface forming apparatus for a magnetic head according to an embodiment of the present invention, and 10 in the figure is an endless wrapping tape. This wrapping tape 10 is made to run at high speed in the six directions of arrows via a tape running mechanism 11, and a grinding mechanism section 12 is disposed in the middle thereof. As shown in FIG. 2, the tape running mechanism section 12 is provided with a plurality of pairs of balls 11a, 11a, such as wrapping balls, which guideably support the middle portion of the wrapping tape 10. A pair of balls 11a, 1
A support structure 13 of the grinding mechanism section 12 is disposed opposite to the grinding mechanism 1a. A plurality of head chips 14 are detachably attached to this support structure 13 via fixing members 15 in correspondence with the plurality of sets of balls 11a, 11a. This support structure 5 integral 13 is arranged so as to be freely driven in the tape width direction (in the direction of arrow C in FIG. 2) via a drive mechanism 16, and an engaging portion 17 formed at the base thereof is arranged in the direction of the tape surface. Arrow C in Figure 2
direction) is engaged with the driving cam portion 18.

In the above configuration, when forming a tape sliding surface on the head chips 14, first, a plurality of head chips 14, which have been rough-finished in advance on the support structure 13, are attached to the tape running mechanism 1.
The fixing members 15 are attached in correspondence with one plurality of sets of balls 11a, 11a. Here, a positioning member 19 that is driven and controlled by a positioning mechanism (not shown) is interposed between the head chip 14 attached to the support structure 13 and the wrapping tape 10 to adjust the amount of protrusion of the head chip 14. After that, the positioning member 19 is separated again and attached so that simultaneous grinding is possible.

Next, the support structure 13 is moved in the tape surface direction by rotation of the cam portion 18 that the engagement portion 17 engages with by a drive motor (not shown), and the drive mechanism 16 is driven to move in the tape width direction. Reciprocating movement −〇− Moved. In this case, the positional relationship between the head chip 14 and the wrapping tape 10 is as shown in FIG. 3, where the amount of chip contact between the head chip 14 and the wrapping tape 10 is t, and the lap sliding range is 1. If the curvature in the chip width direction is rt, the relationship between the chip t and the lap sliding range 1 shows the characteristics as shown in FIG. 4, and the relationship between the chip contact amount t and the curvature rt in the chip width direction is shown in FIG. It has the following characteristics. Therefore, the support structure 13 is located in the shaded area and the fifth area in FIG.
Corresponding to the shaded area in the figure, the amount of tip contact t (for example, t-0.3 to 0.005) causes movement in the tape surface direction and tape width direction by the amount of wrap elapsed time T shown in FIG. A round trip is made. As a result, the wrapping tape 1o is brought into contact with the head chip 14 attached to the support structure 13 over the entire tape sliding surface at the same time, resulting in a desired curvature r.
A tape sliding surface having a radius of t is formed (see FIG. 3(b)).

In this way, the tape sliding surface forming device has the support structure 13
The support structure 13 is continuously moved in the tape surface direction to adjust the contact of the head chip 14, and the head chip 14 is reciprocated in the tape width direction. By configuring it to do so, tape sliding surfaces can be formed on a plurality of head chips 14 at the same time. This makes it possible to automatically mass-produce high-precision products without complicated operations, improving productivity as much as possible compared to conventional methods, and improving product reliability. will also be improved.

Further, the present invention is not limited to the above-mentioned embodiment, but the wrapping tape 10 is formed to have a wide tape width as shown in FIG. Wrapping tape 1
It is also possible to configure the 0 wrapping position to be moved. According to this, it is possible to reduce the need for tape replacement, which involves complicated work, and further promotes an improvement in productivity.

[Effects of the Invention] As detailed above, according to the present invention, it is possible to improve workability and productivity as much as possible with a simple configuration. A device for forming a tape sliding surface of a magnetic head can be provided.

[Brief explanation of drawings]

FIG. 1 is a configuration explanatory diagram showing a tape sliding surface forming device for a magnetic head according to an embodiment of the present invention, FIG. 2 is a detailed diagram shown for explaining the main part details of FIG. The figure is a state diagram shown to explain the grinding operation in Figure 1, Figure 4 is a characteristic diagram showing the relationship between the contact amount of the head chip and the tape sliding surface, and Figure 5 is the contact of the head chip. FIG. 6 is a characteristic diagram showing the relationship between the contact amount of the head chip and the elapsed lap time in the grinding state of FIG. 1, and FIG. 8 and 10 are configuration diagrams showing a conventional magnetic head tape sliding surface forming device, and FIG. 9 is a configuration explanatory diagram showing another embodiment.
It is a figure shown in order to explain the problem of a figure. 1o... Wrapping tape, 11... Tape running mechanism, 12... Grinding mechanism section, 13... Support structure, 14
... Magnetic head, 15... Fixing member, 16... Drive mechanism, 17... Engagement part, 18... Cam part, 19...
...Positioning member. Applicant's agent Patent attorney Takehiko Nuki Suzue + Shizuka To

Claims (1)

[Claims] A support structure to which a plurality of head chips are attached at predetermined intervals, and a tape running means for sliding a wrapping tape to and running against a pair of balls respectively disposed facing the head chips. a first means for controlling the amount of contact of the head chip by controlling the movement of the support structure opposite to the wrapping tape surface; , a second drive control for driving the support structure in the tape width direction;
1. A tape sliding surface forming device for a magnetic head, comprising: means for forming a tape sliding surface of a magnetic head.