JPH0638309B2 - Actuator wire rod support for magnetic head operation in floppy disk drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a magnetic disk for rotationally driving a floppy disk made of a magnetic sheet used as an external storage medium of a computer or the like and reading / writing information from / to the floppy disk. Involved in a floppy disk drive equipped with a head,
In particular, the present invention relates to a wire rod support device for an actuator for operating a magnetic head, in which an actuator for movably operating the magnetic head can be easily attached.

[Conventional technology]

Generally, a floppy disk drive device holds a floppy disk rotatably, and a magnetic head for reading and writing required data is arranged in contact with one side surface or both surfaces thereof. Therefore, when the floppy disk is rotated, the rotating main shaft is engaged with the center of the floppy disk, and when the operation is finished, the main shaft is disengaged from the floppy disk. Further, some floppy disk drive devices are provided with a clamp protruding from the side opposite to the motor hub of the floppy disk so that the center of the floppy disk is held by the rotating main shaft, and some are attracted by a magnet without a clamp. Further, this rotating main shaft is fixed so as not to move laterally, and the critical dimensions of the hub center and the hub height with respect to the magnetic head are fixed.

However, the floppy disk used in the floppy disk drive device conventionally configured as described above is a cartridge provided with an opening for directly contacting a clamp for holding the floppy disk or for contacting two heads with the floppy disk. Since it is housed in the disk, the area on the recording surface of the floppy disk is exposed, so that dust, dirt, fingerprints, scratches, etc. are easily attached to the area.

From this point of view, a motor for driving the floppy disk is attached to a frame configured to be rotatable about the pivot of the drive device, and a groove edge member is attached to an end portion of the frame. The opening for inserting the stored cartridge into the floppy disk drive is closed, and when the groove edge member is moved from the opening when the cartridge is inserted into the floppy disk drive, the frame moves around the pivot point. Rotating to move the motor from its position in engagement with the floppy disk, and after inserting the cartridge to move the groove edge member to its closed position, the frame rotates about its pivot axis to rotate the motor spindle. Moves toward the floppy disk, magnetically holds the hub, and holds the floppy disk on the Bernoulli plate fixed to its drive. Floppy disk drive that is configured to contact arrangement has been proposed (JP 57-18148
No. 7).

However, in this type of floppy disk drive, the magnetic head is attached to the other end of the actuator arm whose one end is fixed to the rotary shaft, and the rotary shaft is provided with a flat magnet having N and S poles. The magnetic circuit thus constructed is connected to the center of rotation of a card-shaped actuator composed of a printed coil. In this case, since the actuator is a card type including a print coil, it is necessary that the operation in the magnetic circuit is stable in a well-balanced manner. Therefore, an actuator to which the actuator arm supporting the magnetic head is fixed. It is required to be attached to the spindle easily and for easy maintenance. In particular, when fixing the card type actuator, it is desired to support the wire material such as the lead wire derived from the print coil so as not to interfere with the operation of the actuator, that is, the operation of the magnetic head.

[Problems to be solved by the invention]

In the above-mentioned conventional floppy disk drive,
When mounting the magnetic head, the card-type actuator, which is mounted on the actuator arm that supports the magnetic head so that it can freely swing in the magnetic circuit through the actuator spindle, requires high accuracy in its operating position, so the mounting is troublesome. It is also difficult to carry out some maintenance. In this case, in order to fix this kind of card type actuator to the actuator spindle, sufficient consideration must be given to the means for supporting the wire material such as the lead wire of the card coil which constitutes this actuator.

Therefore, an object of the present invention is to provide a floppy disk on which a suitable air flow and air layer are formed on a Bernoulli plate, and the disk is stably rotated, and data is recorded and reproduced on the floppy disk by a magnetic head. In the drive device, the actuator for operating the magnetic head can be easily and properly attached so that the positioning thereof can be facilitated and the partial maintenance can be performed, and the actuator can be led out from the print coil which constitutes the actuator. (EN) Provided is a wire rod supporting device for a magnetic head operating actuator in a floppy disk drive device, which can stably support a wire rod such as a lead wire without hindering the operation of the actuator and being easily attached and detached.

[Means for solving problems]

A wire rod supporting device for an actuator for operating a magnetic head in a floppy disk drive device according to the present invention is loaded with a floppy disk housed in a cartridge, and a Bernoulli plate arranged so as to face the floppy disk at the time of loading, and the loading device. A spindle motor having a drive shaft which engages with the driven floppy disk and rotationally drives the same, and a magnetic head which appropriately moves each track of the rotationally driven floppy disk to read and write data, In a floppy disk drive device, an opening is provided in a central portion for projecting a drive shaft of the spindle motor and a motor hub, and an elongated hole is provided so as to be movable away from the opening in a radial direction so as to face the magnetic head. , The magnetic head has one end through an actuator spindle. A card-shaped actuator provided with a print coil that swivels in a magnetic circuit, is provided at the other end of an actuator arm, and the magnetic head and the card-shaped actuator are properly positioned on the actuator spindle. A clamp for detachably holding the actuator is provided, and a recess for inserting and supporting a wire such as a lead wire derived from a print coil of the card-shaped actuator is provided in a part of the clamp.

In the above wire rod support device, the clamp for holding and fixing the card-shaped actuator is composed of a pair of upper clamps, and a wing portion is provided in a part of the upper clamp symmetrically with the mounting position of the card-shaped actuator. By providing a recess that forms a wire insertion hole between the lower surface and the mounting base of the card-shaped actuator, the wire can be supported simply and safely.

[Action]

According to the wire rod supporting device of the actuator for operating the magnetic head in the floppy disk drive according to the present invention, the magnetic head has a fan-shaped card having a print coil whose one end is swung in the magnetic circuit via the actuator spindle. Mounted on the other end of the actuator arm connected to the actuator, in which case the actuator spindle is provided with a clamp for clamping and fixing the base of the card actuator, which is led out of the printed coil of the card actuator. By providing a recess for inserting and supporting a wire material such as a lead wire, it is possible to easily attach and detach the card-shaped actuator and to safely and properly support the wire material.

〔Example〕

Next, an embodiment of a wire rod supporting device for an actuator for operating a magnetic head in a floppy disk drive according to the present invention will be described in detail below with reference to the accompanying drawings.

1 to 4 show an embodiment of a floppy disk drive device incorporating a wire rod supporting device for an actuator for operating a magnetic head according to the present invention, and FIG. 5 shows an actuator for operating the magnetic head. It is a principal part top view which shows the state which mounts and supports a wire. In FIG. 1, reference numeral 10 denotes a frame body for incorporating a floppy disk drive, and a Bernoulli plate 14 for arranging the floppy disk 12 is fixed to one side surface of the frame body 10 via a stopper 16. It A central opening 24 for inserting a drive shaft 20 of a spindle motor 18 and a hub 22 thereof for supplying air and rotating the floppy disk 12 is provided in the central portion of the Bernoulli plate 14 where the floppy disk 12 is arranged. A long hole 26 that is spaced apart from the central opening 24 and extends in the radial direction is formed, and a magnetic head 28 is displaceably inserted through the long hole 26.

Therefore, in this embodiment, the magnetic head 28 is
As shown in FIGS. 4 to 4, the actuator arm 30 is inserted into one end of the actuator arm 30 and fixed, and the other end is attached to the actuator spindle 32. The actuator spindle 32 is rotatably held on a part of the frame body 10 via a bearing 34, and the actuator spindle 32 has a card shape having a print coil formed in a substantially fan shape by a pair of clamps 36a and 36b. The base of the actuator 38 is clamped and fixed. In this case, the card-shaped actuator
38 has magnetic plates 40 and 42 which are vertically spaced apart from each other and which form a magnetic circuit, respectively, and a pair of flat plate magnets 44 and 44 having N and S poles are symmetrically arranged with respect to the lower magnetic plate 42. To do. As a result, the card type actuator 38 can control the turning position by supplying a control current to the coil. Incidentally, reference numeral 46 is a magnetic head 28.
The head harness which connects with is shown.

Therefore, the configuration of the wire rod supporting device for the magnetic head operating actuator according to the present invention will be described with reference to FIG. 5 in relation to the card-shaped actuator 38 and the clamps 36a and 36b for fixing the card-shaped actuator 38 to the actuator spindle 32. To do. That is, the mounting base portion 48 of the card-shaped actuator 38 in the present embodiment extends in a width substantially the same as the outer diameter dimension of the clamps 36a, 36b, and a notch portion 50 for fitting with the actuator spindle 32 is provided in the center portion thereof. ing. On the other hand, in the pair of upper and lower clamps 36a and 36b, the upper clamp 36a is detachably attached to the actuator spindle 32, and the lower clamp 36b is fixed to the actuator spindle 32. Then, the upper clamp 36a is detachably fixed to the lower clamp 36b by set screws 52a, 52b, 52c at positions equidistantly divided into three equal parts. Therefore, also in the mounting base portion 48 of the card-shaped actuator 38, screw holes 54b and 54c are provided in correspondence with the mounting positions of the pair of set screws 52b and 52c of the upper clamp 36a. Therefore, when fixing the card-shaped actuator 38 thus configured to the clamps 36a, 36b coupled to the actuator spindle 32, the pair of set screws 5
2b and 52c are removed from the upper clamp 36a in advance and only the set screw 52a is attached, so that a slight gap is formed between the upper clamp 36a and the lower clamp 36b by the circular boss portion 36c of the upper clamp 36a. It Then
The card-shaped actuator 38 is gripped to mount its base.
Insert 48 between the upper clamp 36a and the lower clamp 36b. At this time, the notch 50 provided in the mounting base 48 of the card-shaped actuator 38 is aligned with the actuator spindle 32.
And is guided by the circular boss portion 36c,
The screw holes 54b, 54c formed in the mounting base 48 and the mounting positions of the set screws 52b, 52c of the upper clamp 36a coincide with each other. Thereafter, the set screws 52b and 52c are respectively screwed into the upper clamp 36a, and the set screw 52a is tightened, whereby the card-type actuator 38 is fixed to the clamps 36b and 36b.
Can be quickly and easily installed on. Further, by making the height of the circular boss portion 36c slightly smaller than the thickness of the card-shaped actuator 38, the actuator arm
The mounting base 48 of 30 can be securely held.

Further, in this embodiment, of the pair of upper and lower clamps 36a, 36b for attaching the card-shaped actuator 38 to the actuator spindle 32, the upper clamp 36a is
Wing portions 58, 58 that symmetrically insert and hold the wire 56 are provided on the tip end side of the card-shaped actuator 38 into which the attachment base 48 enters, that is, on the side where the set screw 52a is attached. Upper clamp 3
As shown in FIG. 6, the wings 58, 58 provided on the 6a are provided with recesses 60, 60 on the lower surface thereof, respectively.
The recesses 60, 60 are configured so as to form the insertion holes of the wire rod 56 when they are attached, and the depth of the recesses 60, 60 is set to be smaller than the diameter of the wire rod 56.

With this configuration, when the card-shaped actuator 38 is clamped and fixed to the clamps 36a and 36b, the lead wires 56 and 56 led out from the print coil are not provided with the recesses 60 and 60.
The lead wires 56, 56 do not play in the recesses 60, 60 due to the elastic force of the wings 58, 58, so that the lead wires 56, 56 are not broken and the card-shaped actuator 38 is not broken. It can be properly supported so as not to interfere with the operation (see FIG. 2).

〔The invention's effect〕

As is apparent from the above-mentioned embodiments, according to the present invention,
When the card type actuator is attached to the actuator spindle, the card type actuator can be detachably attached by a pair of upper and lower clamps, and proper positioning thereof can be easily performed. According to the present invention, by forming the wire insertion hole in a part of the upper clamp of the upper and lower clamps, the wiring around the actuator arm for fixing the card type actuator and the magnetic head can be easily arranged. In particular, since it is a movable part, its operation is not hindered and there is no danger of disconnection.

Therefore, the wire rod supporting device of the magnetic head operating actuator according to the present invention has a simple structure integrated with the mounting device of the magnetic head operating actuator, and facilitates manufacturing of the magnetic head portion and mass production. This makes it possible to reduce the cost of this type of floppy disk drive device, which is extremely effective.

Although the preferred embodiments of the present invention have been described above, it goes without saying that various design changes can be made without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of a floppy disk drive device on a side where a floppy disk is arranged, showing an embodiment of a wire rod supporting device for an actuator for operating a magnetic head according to the present invention.
1 is a schematic rear view of the floppy disk drive device shown in FIG. 1, FIG. 3 is a sectional view taken along the line III-III in FIG. 2, and FIG. 4 is a sectional view taken along the line IV-IV in FIG. FIG. 5 is a plan view of essential parts showing a state in which the actuator for operating the magnetic head shown in FIG. 2 is attached to an actuator spindle for fixing an actuator arm provided with a magnetic head and a wire rod of the actuator is supported, and FIG. VI-VI in Fig. 5
It is a line principal part sectional view. 10 …… Frame, 12 …… Floppy disk 14 …… Bernui plate, 16 …… Stopper 18 …… Spindle motor, 20 …… Drive shaft 22 …… Motor hub, 24 …… Center opening 26 …… Elongated hole, 28 …… Magnetic head 30 …… Actuator arm 32 …… Actuator spindle 34 …… Bearing, 36 …… Clamp 38 …… Card type actuator 40 …… Magnetic plate (upper), 42 …… Magnetic plate (lower) 44 …… Flat magnet, 46 …… Head harness 48 …… Mounting base, 50 …… Notch 52 …… Set screw, 54 …… Screw hole 56 …… Wire rod, 58 …… Wing 60 …… Recess

Claims (2)

[Claims] 1. A Floppy disk housed in a cartridge is loaded, a Bernoulli plate arranged to face the floppy disk at the time of loading, and a drive shaft which engages with the loaded floppy disk and rotationally drives the floppy disk. And a magnetic head for reading and writing data by appropriately moving each track of a rotatively driven floppy disk, and projecting a drive shaft of the spindle motor and a motor hub in the central portion of the Bernoulli plate. In a floppy disk drive device having an opening and an elongated hole facing the magnetic head movably in a radial direction from the opening, the magnetic head has a magnetic circuit at one end via an actuator spindle. Coupling with a card-shaped actuator with a printed coil that pivots in A clamp is provided at the other end of the actuator arm, which clamps the card-shaped actuator in a detachable manner by appropriately positioning the magnetic head and the card-shaped actuator on the actuator spindle. A wire rod support device for an actuator for operating a magnetic head in a floppy disk drive, characterized in that a recess for inserting and supporting a wire rod such as a lead wire derived from a print coil of a rectangular actuator is provided. 2. A wire rod supporting device for an actuator for operating a magnetic head according to claim 1, wherein the clamp for holding and fixing the card type actuator is composed of a pair of upper and lower clamps, and a card type is provided in a part of the upper clamp. A magnetic head in a floppy disk drive device in which a wing portion is provided symmetrically with the mounting position of the actuator, and a recess is formed on the lower surface of the wing portion to form a wire rod insertion hole with the mounting base of the card-shaped actuator. A wire rod support device for operating actuators.