JPH026126B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method and device for winding a coil for a magnetic recording head, and in particular to a magnetic disk device incorporated in a computer, word processor, etc.
This invention relates to a method and device for winding a coil around a micro-sized magnetic recording head used in a video tape deck device.

[Prior art]

In recent years, the development of computers has been remarkable, with computers becoming smaller and smaller and entering offices and homes. In miniaturized computers, such as office computers, word processors, and personal computers, magnetic materials called floppy disks are used to store large amounts of data such as control programs and input/output data. Magnetic recording disks are used in which a coated Mylar disk is housed within a plastic case.

When such a floppy disk is inserted into a computer device, it rotates several hundred times a minute, and a magnetic recording head 1 as shown in FIG. 1 scans a track T set in the circumferential direction of the disk. Various data recorded on the track T by the magnetic recording head 1 is read out and conversely recorded.

Furthermore, video tape decks, which are rapidly becoming popular in homes in recent years, are equipped with at least two magnetic recording heads on a rotating head for recording images on tape.

FIG. 2 shows the structure of the magnetic recording head 1. As shown in FIG. The magnetic recording head 1 is provided with a core portion 3 forming a magnetic circuit on the side of its main body 2, and a gap portion 5 is formed between the core portion 3 and the main body 2. A gap portion 7 filled with a non-magnetic material is formed between the lowermost portion 3a of the core portion 3 and the protrusion 6 provided on the main body 2. 4 is a coil wound around the core portion 3;
It converts the magnetic signal flowing through the core section 3 into an electrical signal.

However, in the magnetic recording head 1 configured as described above, the coil 4 wound around the core portion 3 has an extremely thin diameter of, for example, about φ0.1 mm, and is flexible, and furthermore, Main body 2 and core part 3
Since the distance between the two coils is only about 0.4 mm, it is not possible to use a machine to wind the coils around the core part 3. Conventionally, female workers took turns winding the coils 4 around the core part 3 while looking through a microscope. Since the magnetic recording head 1 had to be manually turned over several times, it took a lot of man-hours to manufacture the magnetic recording head 1, and this required manufacturing time, resulting in an increase in cost. Another problem was that female workers involved in manufacturing such magnetic recording heads were unable to work for long periods of time because their eyes were extremely tired during the manufacturing process.

[Object and structure of the invention]

It is an object of the present invention to solve the above-mentioned problems when winding a coil on a conventional ultra-small magnetic recording head, and to automatically and accurately wind a coil on the core of a magnetic recording head using a machine that was previously impossible. The object of the present invention is to provide a method for winding a coil around a core portion of a magnetic recording head, and a winding device capable of accurately winding a coil around a core portion of a magnetic recording head in a short time.

A method for winding a coil for a magnetic recording head according to the present invention which achieves the above object includes connecting a predetermined length of a straight steel wire made of a magnetic material to the tip of a flexible coil for a magnetic recording head. A steel wire is guided around a circuit by magnetic force, and a gap surrounded by the core of the magnetic recording head is inserted into the circuit at right angles to the moving direction of the steel wire. The coil to be connected is passed through this gap, and the position of the gap is changed each time the steel wire is inserted, so that the required number of coils are wound around the core of the magnetic recording head. The winding device for a coil for a magnetic recording head of the invention winds a straight steel wire made of a magnetic material attached to the tip of a flexible magnetic recording head coil around a circuit circuit by induction by magnetic force. This is a device for winding a coil around the core of a magnetic recording head by passing this steel wire through a gap surrounded by the core, and is formed by spanning a driving disk and a driven disk with a conveying body. an orbiting conveyance machine, an electromagnet attached to the conveyance body and moved around the circuit by the conveyance machine, a base plate made of a non-magnetic material provided below the circuit, and a locus on the base plate of the circuit A coil supply path is provided to extend in the tangential direction of the magnetic recording head, and a gap portion, which is inserted so as to pass through the same locus and is surrounded by the core portion of the magnetic recording head, is perpendicular to the direction of the locus. a head support device that is located at the head support device and can change the gap in vertical and horizontal directions with respect to the trajectory; a control device that turns off the power to the
A magnet is provided at a position opposite to the electromagnet with a base plate in between so as to guide the steel wire by magnetic force in a non-energized section of the electromagnet.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

3 to 6 are for explaining the method of winding a coil for a magnetic recording head according to the present invention.

In the method of the present invention, first, an ultra-fine steel wire 8 made of a magnetic material (for example, piano wire with a diameter of about 0.07 mm) is electrically welded or glued to the tip of the coil 4 that is wound around the core of the magnetic recording head. and connect. The length of the steel wire 8 may be slightly longer than the diameter of a magnet for guiding the steel wire, which will be described later.

Then, as described above, the steel wire 8 connected to the tip of the coil 4 is guided by the magnetic force of the magnet 9, but there is a space between the magnet 9 and the steel wire 8 so that the steel wire 8 is not directly attracted to the magnet 9. A base plate 10 made of non-magnetic material is inserted. The magnet 9 is rotated around a circuit S below this base plate 10 by a circuit conveyor 20.

The orbiting conveyor 20 is composed of, for example, a driving disk 21, a driven disk 22, and a conveying body 23 such as a belt or a chain stretched between them, and a magnet 9 (permanent magnet or electromagnet) is attached to the conveying body 23. You should use one that has one attached. Drive disc 2
If the sizes of the driven disk 1 and the driven disk 22 are the same, the circumferential path S of the magnet 9 will be an elliptical path, but it is not necessary to make the sizes of the two the same.

In addition, in order to reliably wind the coil 4 around the core portion 3 of the magnetic recording head 1, the long circumferential circuit S of the magnet 9 is provided.
When the locus on the base plate 10 is K, guide members 11 and 12 are provided protrudingly on the base plate 10 with one straight part Ks of the locus K interposed therebetween, and a linear groove part 13 is formed between them. I'll keep it. The width of the groove portion 13 is larger than the maximum diameter of the joint portion between the coil 4 and the steel wire 8, and the width of the groove portion 13 is larger than the maximum diameter of the joint portion between the coil 4 and the steel wire 8.
Form it to be smaller than the width of. A guide member 14 is provided in a protruding direction in the extending direction of the straight line portion Ks of the trajectory K (the tangential direction of the curved portion Kr) so as to face the guide member 12, and a groove portion similar to the groove portion 13 is formed between the guide member 14 and the guide member 14. A coil supply path 15 is formed in advance.
16 is a circumferential groove provided in the guide material 12;
It is located outside the boundary between the curved part Kr and the straight part Ks of the trajectory K, and when the straight steel wire 8 that has moved through the curved part Kr moves to the straight part Ks, it hits the guide material 12. This prevents it from touching and bending.

A coil supply device 30 is prepared to supply the steel wire 8 and the coil 4 connected thereto from the coil supply path 15 to the trajectory K, and a head is also provided to move the magnetic recording head 1 vertically and horizontally. A support device 40 is prepared. This head support device 40 is composed of an arm portion 41 to which the magnetic recording head 1 is attached, and a main body 42 having a built-in drive mechanism for moving the arm portion 41 vertically and horizontally.

Further, in order to move the magnetic recording head 1 supported by the arm portion 41 within the groove portion 13, the base plate 10 is provided with a portion of the groove portion 13 from the outside thereof.
There is a recess 17 for the head support device which is cut out to reach the groove 13, and the recess 17 is formed perpendicularly to the groove 13.

In the method of the present invention, as shown in FIG. 5, when the steel wire 8 and the coil 4 guided by it are sent out from the coil supply path 15 by the coil supply device 30 and the steel wire 8 rides on a trajectory K, the rotating magnet The coil 4 is attracted by the magnetic force of 9, and the coil 4 is attached to the base plate 1.
0 along the trajectory K. The coil 4 is oriented by a linear coil supply path 15, and rides on the trajectory K from the tangential direction to the curved part Kr of the trajectory K, and from the direction on the extension line to the straight part Ks. , normally enters straight into the groove 13 sandwiched between the guide material 11 and the guide material 12, but even if it is slightly shifted, it will enter the groove 13 due to the taper of the circumferential groove 16 and the end 11a of the guide material 11. enters smoothly and moves straight on the trajectory K inside the groove 13.

Since the steel wire 8 passes through the gap 5 of the magnetic recording head 1 inserted into the groove 13 so that the trajectory K passes through the gap 5, the coil 4 guided by the steel wire 8 also passes through the gap 5. It will be inserted. After passing through the gap 5, the steel wire 8 is guided by the magnet 9 and revolves on the trajectory K, but the flexible coil 4 does not pass on the trajectory K when the steel wire 8 enters the curved section Kr. Climb over the guide material 11 and move the inside of the trajectory K to the core part 3
The steel wire 8 is followed so that the distance between the steel wire 8 and the steel wire 8 is the shortest, and after the steel wire 8 passes through the point farthest from the core part 3, it is pulled by the steel wire 8 while being loosened. The coil supply device 30 supplies coils 4 to the locus K side, which are longer than the total length of the coils 4 to be wound around the core part 3 in a state where the coils 4 have started to loosen.

After passing through the curved section Kr, the steel wire 8 enters the straight section Ks, and then enters the original groove section 13 again via the curved section Kr. Even if the steel wire 8 protrudes in the traveling direction of the magnet 9, the circumferential groove 16 prevents the protruding portion from coming into contact with the guide member 12. Then, when the steel wire 8 is inserted through the gap 5 again, the coil 4 is inserted into the core part 3.
This means that it has been turned upside down. At this time, the magnetic recording head 1 is moved downward by the wire diameter of the coil 4 from the position where the steel wire 8 was inserted through the gap 5 by the action of the head support device 40.
As a result, the coil 4 is wound in a spiral shape without overlapping the previously wound coil 4. In addition, when winding the coil 4 twice around the core part 3, the magnetic recording head 1 is moved to the trajectory K side by the head support device 40 when one winding is completed, and then lowered by the wire diameter of the coil 4. You just have to do as you go.

〔Effect of the invention〕

As explained above, the method of the present invention can be applied to the core part of a magnetic recording head, particularly a very small magnetic recording head for use in computers, etc., where an operator had to carefully wind each coil one by one while looking at a microscope. When winding the coil, a predetermined length of straight steel wire made of magnetic material is connected to the tip of the flexible ultra-fine wire coil, and this steel wire is guided by magnetic force to go around the circuit. A gap surrounded by the core of the magnetic recording head is inserted into this circumferential circuit at right angles to the moving direction of the steel wire, so that the steel wire and the coil connected thereto are passed through the gap, and the steel By changing the position of the gap each time the wire is inserted and winding the required number of coils around the core of the magnetic recording head, it is possible to automatically shorten the coil around the core of the magnetic recording head using a machine. It can be turned over quickly and accurately, which has the effect of reducing the cost of the magnetic recording head.

Next, a specific embodiment of an apparatus capable of winding a coil around the core portion of a magnetic recording head using the method described above will be described with reference to FIGS. 7 to 10.

As shown in FIG. 7, the magnetic recording head coil winding device of this embodiment includes a drive disk 21 that can be rotated by a drive motor 24, a driven disk 22 that is a free wheel, and a drive disk 21 that can be rotated by a drive motor 24. An orbiting conveyor 20 consisting of a conveyor 23 such as a chain or belt which is spanned over the upper orbit conveyor 20 is provided facing each other with the base plate 10 in between, and an electromagnet 18 is attached to the conveyor 23A of the upper orbit conveyor 20. cage, lower transport body 2
A permanent magnet 19 is attached to 3B. These electromagnets 18 and permanent magnets 19 are attached to the same position across the base plate 10 of the carrier 23, and are moved by the carrier 23, which is spanned between the driving disc 21 and the driven disc 22. Circumferential circuit S to be formed
are designed to move together at the same speed.

A linear groove 13 is formed in the base plate 10 made of a non-magnetic material by the guide material 11 and the guide material 12 on the locus K of the circuit of the electromagnet 18 and the permanent magnet 19.
is formed in this groove 13, and the base plate 1
A recess 17 for a head support device is provided that reaches from the outside of the head support device to the groove 13. Further, a coil supply device 30 is provided on the outside of the base plate 10 of the coil supply path 15 which extends in the tangential direction of the locus K on the base plate of the circumferential circuit and is sandwiched between the guide members 12 and 14. is installed so that the coil 4, which is passed through the coil supply path 15 and guided to the steel wire 8, is supplied onto the trajectory K.

Furthermore, in the head support device recess 17,
It is possible to hold the magnetic recording head 1 and position the gap surrounded by its core perpendicularly to the direction of the trajectory K, and to change the gap in the vertical and horizontal directions with respect to the trajectory K. Head support device 4
0 is attached, and the cavity 5
The magnetic recording head 1 is held in the recess 17 for the head support device so that the trajectory K passes through the recess 17.

The drive motor 24, coil supply device 30, and head support device 40 of the orbiting conveyor 20 are all connected to a control device 50. This control device 50 is
The feed speed of the orbiting conveyor 20 is adjusted by the head support device 40.
The electromagnet 18 is decelerated before and after , and the electromagnet 18 is de-energized in this deceleration section.

FIG. 8 is a side view of a magnetic recording head coil winding device 60 comprising the components as described above. Between the upper machine frame 61 and the lower machine frame 62, an upper board 25 and a lower board 26 that constitute the orbiting conveyor 20 are provided by a plurality of bosses 63, and the driving disc 21 and the driven disc The plate 22 is arranged on both of these substrates 25 and 26. Guide grooves 65 are formed in both the substrates 25 and 26 to hold the supporting parts 28 and 29 of the electromagnet 18 and the permanent magnet 19 attached to the carrier 23 and to allow them to run smoothly. Reference numerals 64 denote bearings provided between the guide groove 65 and the support portions 28 and 29, respectively.

The electromagnet 18 is located directly above the trajectory K on the base plate 10, but the permanent magnet 19 always maintains a constant position within the groove 13 when the steel wire 8 moves within the groove 13. Thus, the groove portion 13 is biased toward the inside or outside.

FIG. 10 shows the structure of the head support device 40. The head support device 40 is connected to the lower machine frame 62
It consists of a main body 42 attached to the main body 42, a columnar part 44 that is vertically movably guided to the main body 42 by a key 43, and an arm part 41 that penetrates the columnar part 44 and is movable in the horizontal direction. The magnetic recording head 1 has a gap 5 surrounded by the core 3 at the free end of the arm 41 and a groove 1 of the base plate 10.
It is supported so that it is located within 3. The columnar part 44 is screwed onto a threaded rotating shaft 46 of a pulse motor 45 attached to the lower part of the main body 42, and is moved up and down by the rotation of the pulse motor 45. There is. The lower surface of the arm portion 41 is formed into a rack shape, and the rack portion 49 is adapted to mesh with a pinion 48 of a pulse motor 47 attached to the columnar portion 44. It is designed to be able to move slightly in the horizontal direction by rotating.

The rotation of the pulse motors 45 and 47 is controlled by the control device 50, and the head support device 40 allows the gap 5 of the magnetic recording head 1 to slightly move vertically and horizontally relative to the groove 13 of the base plate 10. Core part 3
Make sure that the coil 4 is properly wound in a spiral shape.

In the magnetic recording head coil winding device of this embodiment configured as described above, the coil 4 connected to the steel wire 8 is moved from the coil supply path 15 onto the trajectory K of the base plate 10 by the coil supply device 30. When the steel wire 8 is supplied, the electromagnet 18 that has moved along the trajectory K attracts the steel wire 8. Then, the steel wire 8 is moved along the trajectory K by the electromagnet 18 at a high speed without touching the base plate 10, and the adsorption position to the electromagnet 18 is set along the groove 13 by the guide members 11 and 12. It is corrected and conveyed into the groove 13.

When the steel wire 8 is carried inside the groove 13 while being attracted to the electromagnet 18 and approaches the head support device 40,
The control device 50 de-energizes the electromagnet 18, and at the same time the control device 50 de-energizes the orbiting conveyor 20.
transport speed is reduced.

As a result, the steel wire 8 falls from the electromagnet 18 into the groove 13 and is now attracted along the wall of the groove 13 by the permanent magnet 19 that was moving below the base plate 10. The steel wire 8 is moved at low speed within the groove 13 by a permanent magnet 19, and is inserted through the gap 5 surrounded by the core 3 of the magnetic recording head 1 inserted into the groove 13 to form a coil. 4 through the cavity 5.

In this way, the coil 4 passes through the gap 5,
When the steel wire 8 is separated from the head support device 40 by a predetermined distance, the electromagnet 18 is energized by the control device 50, and thereafter the conveyance speed of the orbiting conveyor 20 is increased. When the electromagnet 18 is energized, the steel wire 8 is attracted to the electromagnet 18, which has a stronger attractive force than the permanent magnet 19, and then moves along the trajectory K while being attracted to the electromagnet 18. At this time, the flexible coil 4 is stretched around the steel wire 8, and the electromagnet 1
The coil 8 is automatically supplied onto the base plate 10 from the coil supply device 30 until it becomes the farthest from the core part 3, and after that, as the distance between the electromagnet 18 and the core part 3 is shortened, it slackens and follows the steel wire 8. The control device 50 sends a signal to the coil supply device 30 when the coil 4 is no longer stretched by the steel wire 8, and sends an extra coil 4 on the base plate 10, which is longer than the total length of the coil 4 to be wound around the core part 3. supply to.

When the electromagnet 18 makes a quick turn on the trajectory K and approaches the head support device 40 again, the control device 50 de-energizes the electromagnet 18 in the same manner as described above, and the conveyance speed of the orbiting conveyance machine 20 is decelerated. be done.
Therefore, the steel wire 8 is connected to the head support device 40 in the same manner as described above.
The coil 4 is moved at a low speed by the permanent magnet 19 only in a predetermined section before and after the magnetic recording head 1, and the coil 4 is wound around the core portion 3 by being reliably inserted into the gap 5 of the magnetic recording head 1.

Note that the pulse motor 45 or 47 of the head support device 40 is activated by a command from the control device 50 between the time when the steel wire 8 passes through the gap 5 of the magnetic recording head 1 and until the steel wire 8 passes through the gap 5 again. , the cavity 5 is slightly moved vertically or horizontally by the wire diameter of the coil 4. By this operation of the head support device 40, the coil 4 is correctly wound around the core portion 3 in a spiral shape without any gaps.

〔Effect of the invention〕

As explained above, the magnetic recording head coil winding device of the present invention winds a straight steel wire made of a magnetic material attached to the tip of a flexible magnetic recording head coil by magnetic induction. This device winds a coil around the core by passing the steel wire through a gap surrounded by the core of the magnetic recording head. an electromagnet that is attached to the carrier and moves around the circuit by the conveyor, a base plate made of a non-magnetic material provided below the circuit, and the circuit A coil supply path is provided extending in the tangential direction of the locus on the base plate of the base plate, and the coil supply path is inserted so as to pass through the same locus, and the gap portion surrounded by the core portion of the magnetic recording head is connected to the locus. a head support device that is positioned perpendicular to the direction of the head support device and can change the gap in vertical and horizontal directions with respect to the trajectory; a control device that turns off energization to the electromagnet in a deceleration section; and a control device for guiding the steel wire by magnetic force in a non-energized section of the electromagnet;
By constructing a magnet located opposite the electromagnet with a base plate in between, the coil can be wound reliably and accurately in a short time in the gap surrounded by the core of the magnetic recording head. There is an effect.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a magnetic recording head used in a magnetic disk device, FIG. 2 is an enlarged perspective view of the magnetic recording head shown in FIG. 1, and FIGS. Figure 3 is a perspective view showing the steel wire attached to the tip of the coil, Figure 4 is an assembled perspective view showing the configuration of the device used in the method of the present invention, and Figure 5 is a diagram for explaining the coil winding method. FIG. 6 is an explanatory diagram showing how a coil is wound around a magnetic recording head according to the method of the present invention, FIG. 6 is a side view of the magnetic recording head showing how a coil is wound around a core portion of the magnetic recording head, and FIGS. FIG. 10 shows the configuration of a winding device for a magnetic recording head coil according to the present invention, FIG. 7 is an assembled perspective view of the winding device, FIG. 8 is a schematic side view of the device, and FIG. FIG. 8 is an enlarged sectional view of the attachment portion of the electromagnet and permanent magnet, and FIG. 10 is a side view showing the structure of the head support device. 1... Magnetic recording head, 3... Core section, 4...
Coil, 5...Gap, 8...Steel wire, 9...Magnet, 10...Base plate, 11, 12, 14...Guide material, 15...Coil supply path, 17...Recess for head support device , 18... Electromagnet, 19... Permanent magnet, 20... Orbiting conveyor, 21... Drive disk,
22... Driven disk, 23... Transport body, 24... Drive motor, 30... Coil supply device, 40... Head support device, 50... Control device.

Claims (1)

[Claims] 1. A straight steel wire made of a magnetic material is connected to the tip of a flexible magnetic recording head coil for a predetermined length, and this steel wire is guided by magnetic force into a circuit. A gap surrounded by the core of the magnetic recording head is inserted into this circuit at right angles to the moving direction of the steel wire, so that the steel wire and the coil connected thereto are passed through the gap. 1. A method for winding a coil for a magnetic recording head, characterized in that the position of the gap is changed every time the steel wire is inserted so that the required number of coils are wound around the core of the magnetic recording head. 2. A straight steel wire made of a magnetic material attached to the tip of a flexible magnetic recording head coil is guided around a circuit by magnetic force,
This device winds a coil around the core by passing this steel wire through a gap surrounded by the core of the magnetic recording head. a conveyance machine, an electromagnet attached to the conveyance body and moved on a circumferential circuit by the conveyance machine, a base plate made of a non-magnetic material provided below the circumferential circuit, and a trajectory on the base plate of the circumferential circuit. A coil supply path is provided to extend in the tangential direction, and a gap portion that is inserted so as to pass through the same locus and that holds the magnetic recording head and is surrounded by the core portion is perpendicular to the direction of the locus. a head support device that can change the gap in vertical and horizontal directions with respect to the locus; It is characterized by being comprised of a control device that turns off the current, and a magnet provided at a position opposite to the electromagnet with a base plate in between so as to magnetically guide the steel wire in the non-energized section of the electromagnet. Winding device for coils for magnetic recording heads.