JPS63142563A - Motor loading device for floppy disk drive device - Google Patents

Abstract

PURPOSE:To simplify the constitution and to enable the smooth and accurate loading and unloading of a disk by transferring vertically a spindle motor for turning the disk so far as a prescribed distance. CONSTITUTION:The spindle motor 18 for rotationally driving the floppy disk is supported by a supporting body 34. On the side of the supporting body 34, a pair of pins 36 and 40 are provided and supported by a pair of loading arms 62 and 64, and the other end parts of the arms 62 and 64 are allowed in contact with loading cams 74 and 76. In this constitution when a loading shaft 66 is turned by an operation lever 78, the supporting body 34 can be moved vertically in a specific distance via cams 74 and 76 and the arms 62 and 64. Consequently, the disk loading and unloading are carried out smoothly with accuracy by advancing and retreating the drive shaft of the motor 18 vertically against a disk hut.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a floppy disk drive device equipped with a spindle motor for rotationally driving a floppy disk made of a magnetic sheet used as an external storage medium for computers, etc. The present invention relates to a motor loading device that can move a spindle motor in the axial direction relative to a floppy disk to easily and properly load and unload the motor.

[Conventional technology]

The floppy disk drive device rotatably holds a floppy disk, and a magnetic head for reading and writing required data is placed in contact with one or both sides of the floppy disk.

Therefore, when rotating the floppy disk, the main shaft of rotation is engaged with the center of the floppy disk (called loading), and when the operation is finished, the main shaft is removed from the floppy disk (called unloading).
It is configured like this. In addition, the floppy disk drive is
Some floppy disks have a clamp protruding from the opposite side of the floppy disk motor hub to hold the center of the floppy disk on the rotating main shaft, while others are magnetically attracted to the floppy disk without a clamp. Further, this rotational main shaft is fixed so as not to move laterally, and the critical dimensions of the hub center and hub height relative to the magnetic head are fixed.

However, conventionally, the floppy disk used in the floppy disk drive device configured in this manner has an opening for directly contacting the clamp holding the floppy disk, or for bringing two heads into contact with the floppy disk. Since the floppy disk is housed in a cartridge, a certain area of the recording surface of the floppy disk is exposed, so it is susceptible to dust, dirt, fingerprints, scratches, etc.

From this point of view, the motor that drives the floppy disk is attached to a frame configured to be rotatable around the axis of the drive device, and a grooved edge member is attached to the end of this frame, and this grooved edge member is attached to the edge of the floppy disk. An opening for inserting the stored cartridge into the floppy disk drive is closed, and then when the groove edge member is moved from the opening when inserting the cartridge into the floppy disk drive,
The frame is rotated about its pivot point so that the motor is moved out of engagement with the floppy disk, and after insertion of the cartridge the frame is rotated about its pivot point by moving the channel edge member to its closed position. A floppy disk drive device was proposed in which the main shaft of the motor moves toward the floppy disk and magnetically attracts and holds its hub, and the floppy disk is placed close to a Bernoulli plate fixed to the drive device. (Unexamined Japanese Patent Publication No. 57-181)
No. 487).

However, in this type of floppy disk drive, it is necessary to position the motor's drive shaft and the floppy disk hub with high precision and excellent reproducibility. If this occurs, the air layer formed between the Bernoulli plate and the floppy disk becomes non-uniform, causing a number of problems such as damage to the floppy disk and increased azimuth error of the magnetic head.

[Problem that the invention seeks to solve]

In the conventional floppy disk drive device mentioned above,
When loading or unloading a floppy disk by moving the drive shaft of the motor toward or away from the hub of the floppy disk, multiple reference planes of the required components are used to ensure accurate positioning and good repeatability. The setting and the configuration and arrangement of the members relative to these reference planes are complicated, and frequent handling causes positional fluctuations due to fatigue of the parts, resulting in poor reproducibility.

Therefore, an object of the present invention is to place a floppy disk on a Bernoulli plate, form an appropriate air flow and an air layer to stably rotate the floppy disk, and use a magnetic head to record and reproduce data on the floppy disk. In the floppy disk drive device configured as above, by vertically moving the spindle motor that rotationally drives the Flo Novi disk, the hub and drive shaft of this motor can be attached and detached from the floppy disk properly and with high precision with a simple configuration. An object of the present invention is to provide a motor loading device for a floppy disk drive that maintains good reproducibility and can prevent damage to the floppy disk and azimuth errors of the magnetic head.

[Means for solving problems]

In the motor loading device for a floppy disk drive device according to the present invention, a floppy disk housed in a cartridge is loaded, and a Bernoulli plate arranged to face the floppy disk at the time of loading engages with the loaded floppy disk. A spindle motor having a drive shaft for rotationally driving the floppy disk, and a magnetic head for appropriately moving each trunk of the rotationally driven floppy disk to read and write data, and the spindle motor is mounted in the center of the Bernoulli plate. In the flow-novi disk drive device, the magnetic head is provided with an opening through which the drive shaft and the motor knob protrude, and an elongated hole through which the magnetic head faces so as to be movable in the radial direction from the opening. The spindle motor is supported by a support, and a pin is provided protruding from a part of the support in correspondence with a pair of opposing side surfaces of the spindle motor, and the pin of the support is inserted to allow the pin to move up and down. A pair of brackets are provided to hold the support body, one end of the pair of loading arms is coupled to each pin of the support body, and the other end of the loading arm is pivoted to a loading arm shaft inserted between the brackets. and install loading cams that act simultaneously on the other end of each of the loading arms.Then, these loading cams are attached to a common loading shaft, and an elastic force is provided to keep the spindle motor always in a loaded state with respect to the loading arm. The present invention is characterized in that a member is provided, and a cylindrical portion supporting the spindle motor is fitted into a cylindrical portion provided on a frame to guide movement of the spindle motor.

In the motor loading device, the elastic member that always maintains the spindle motor in a loaded state with respect to the loading arm is mounted between each loading arm and each bracket via a loading arm shaft inserted between the opposing brackets. It can be constructed with a coil spring.

Further, a third bin may be provided to protrude perpendicularly to the pair of opposing bottles protruding from the support body, and a bracket may be provided to insert the third bin and hold the third bin in a vertically movable manner.

Furthermore, the loading cam that acts on the pair of loading arms comes into contact with the other end of the loading arm against the elastic force due to the rotation of the loading shaft, displacing it by lever action, and moving the spindle motor perpendicularly to its axial direction. Configure it to move to .

Furthermore, the cylindrical part provided in the frame is made of a motor guide bearing, and its inner peripheral surface has a two-stage structure consisting of a tapered part and a straight part, so that the planar positional relationship with respect to the magnetic head is as described above when loading of the floppy disk is completed. The motor housing cylindrical portion that supports the spindle motor can be configured to be regulated by the straight portion.

In addition, the amount of protrusion of the motor hub is determined by the pressing force of the loading arm and the contact between the spindle motor support reference surface and the frame reference surface, and the same force is applied to the three reference surfaces of the frame. It can be configured as follows.

[Effect]

According to the motor loading device for a floppy disk drive according to the present invention, the entire spindle motor is supported by a support, a pair of bins are provided on opposite sides of the support, and each of the bins is supported by a pair of loading arms. At the same time, the loading arm is held movably in the vertical axial direction, and the loading cam is brought into contact with the other end of the loading arm to displace it by lever action. Appropriate and smooth loading and unloading operations can be performed by vertically moving the spindle motor drive shaft and motor hub forward and backward.

In particular, according to the motor loading device of the present invention, the spindle motor can be moved perpendicularly and in a fixed dimension in the axial direction of the spindle motor with a simple configuration, and the performance of this type of floppy disk drive device is improved and the magnetic head for the floppy disk can be moved. It maintains good reading and writing accuracy, and also provides sufficient protection for the floppy disk.

〔Example〕

Next, embodiments of a motor loading device for a floppy disk drive according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 5 show an embodiment of a floppy disk drive device incorporating a motor loading device according to the present invention.

Fig. 1 is a plan view of the device seen from the Bernoulli plate side on which the floppy disk is placed, Fig. 2 is a rear view of the device shown in Fig. 1 showing the installed state of the floppy disk drive motor, and Fig. 3 is a view of the drive motor. Fig. 4 is a cross-sectional side view of the main part showing the state in which the drive motor is unloaded with respect to the floppy disk, and Fig. 5 is a cross-sectional view of the main part showing the state in which the drive motor is loaded with respect to the floppy disk. FIG. Therefore, the apparatus of the present invention will be explained based on these drawings. In FIG. 1, reference numeral 10 indicates a frame body into which a floppy disk drive device is installed, and a Bernoulli plate 14 for arranging a floppy disk 12 is fixed to one side of this frame body 10 via a stopper 16. Ru. At the center of the Bernoulli plate 14 where the floppy disk 12 is placed, there is provided a central opening 24 through which the drive shaft 20 of the spindle motor 18 and its hub 22 for supplying air and rotationally driving the floppy disk 12 are inserted. A long hole 26 is formed spaced apart from the central opening 24 and extending in the radial direction thereof, and a magnetic head 28 is displaceably inserted through the long hole 26.

Therefore, in this embodiment, the spindle motor 18
As shown in FIG. 3, the motor housing cylindrical portion 30
, the motor rotor section 32 , and this spindle motor 18
pins 36, 38 are provided on a pair of opposing edges of this support body 34 to protrude outward in the radial direction; A third pin 40 is provided to protrude in the direction of displacement. Then, these pins 36, 38, 40 are attached to the frame 10, respectively.
It is attached so that it can move up and down to the brackets 42, 44, and 46 that are fixed to it. Therefore, each of the brackets 42, 44.
Each of the pins 46 is provided with a vertically long pin insertion hole 48 so as to be able to hold each of the pins 36, 38, 40 vertically movably.

The spindle motor 18 has a drive shaft 20 protruding from the center of the tip end of the motor housing cylindrical portion 30.
A magnet 54 that attracts and holds the hub 52 of the floppy disk 12 housed in the cartridge 50 on the outer periphery of its base.
A motor hub 22 is provided. In this case, a motor guide bearing 5 for guiding the motor housing cylindrical portion 30 of the spindle motor 18
6 is attached to the frame 10 and configured to firmly fix the spindle motor 18 in a fixed position during loading. Therefore, this motor guide bearing 56 has a tapered part 58 for guiding at the upper part thereof, and a straight part 60 which holds the motor housing cylindrical part 30 at the lower part.

Further, a frame 10 is attached to the support 34 of the spindle motor 18.
A belt-shaped reference surface 104 is provided to make contact with the reference surface 104, and three reference surfaces 103a, 103b, 103 are provided on the frame side facing this.
3c is provided.

Loading arms 62 and 64 for loading and unloading the floppy disk 12 on the spindle motor 18 configured as described above;
are respectively provided for a pair of opposing pins 40 and 42 provided on the support body 34 of the spindle motor 18. These loading arms 62, 64 are pivotally connected to a loading arm shaft 66 which is inserted between the brackets 42, 44, and a coil spring 68, 70 is wound around each of the loading arm shafts 66. are engaged with the brackets 42 and 44, respectively, and the other ends are engaged with the loading arms 62, respectively.
．． The spindle motor 18 is always urged in the loading direction by coming into contact with one end side of the spindle motor 64. On the other hand, the other end sides of the loading arms 62 and 64 are configured to abut loading cams 74 and 76 respectively attached to the loading shaft 72. The loading shaft 72 has one end protruding from the outside of the frame 10 and is provided with an operating lever 78 at the end so that it can be operated externally.

Further, the rope ink shaft 72 is provided with a pair of operating cams 80 and a lock cam 82 adjacent to the loading cam 76 for mechanically self-maintaining the loading state. Therefore, the operating cam 80 and the lock cam 82 are such that during the loading operation, the operating cam 80 turns on the limit switch 84, thereby energizing the Trail 86, and the operating rod 88 is attached to the losoquam. The lock arm 92 is displaced against the elasticity of a spring 90 attached to one end of the lock arm 92.
is held in a position that locks the lock cam 82,
The loading shaft 72 is held in a locked state. Furthermore, the loading shaft 72 is supported by a bearing 94 as appropriate.
This shaft 72 is held on the frame 10 via
A rotational displacement limiting cam 96 and the like are provided.

In the embodiment described above, reference numeral 98 is a lead wire bundle that supplies a control signal for controlling the drive of the spindle motor 18, and 100 is a lead wire bundle that is connected to the support 34 of the spindle motor 18 during loading or unloading. spring for elastic support, 10
Reference numeral 2 denotes a spring that is coupled to the tip of the loading shaft 72 to keep it elastically held at all times to ensure smooth operation.

Next, the operation of the motor loading device having the above structure will be explained with reference to FIGS. 4 and 5.

FIG. 4 shows the unloading state of the spindle motor 18 with respect to the floppy disk 12, and FIG. 5 shows the loading state.

Now, in FIG. 2, when the loading cams 74, 76 do not act on the loading arm 62, 64, the loading arm 62, 64 uses the loading arm shaft 66 as a fulcrum due to the action of the coil spring 68, 70. Pushing downward against the support 34 of the spindle motor 18 via the pins 36, 38;
As shown in FIG. 3, the reference surface 104 of the support body 34 is pressed against the three reference surfaces 103a, 103b, and 103c of the frame,
The loading state is maintained (see Figure 5). Therefore,
To bring the spindle motor 18 into the unloading state from this state, by rotating the loading shaft 72 in the direction shown by the arrow in FIG. 5, the loading cam 74 (76) moves the loading arm 62! (64
) and is forcibly pressed downward, the loading arm 62 (64) pivots about the loading arm shaft 66 and the other end is lifted. In this case, the spindle motor 18 is
A pin 36 (38) protruding from the support body 34 is connected to the bracket 4.
2 (44), it is always displaced in the vertical direction with respect to the Bernoulli plate 14 and can be in an unloading state (see FIG. 4). Next, in order to change the spindle motor 18 from this state to a loading state, the loading shaft 72 is
By rotating the loading arm 62 (76) in the direction shown by the arrow in FIG.
The loading arm 62 (64) separates from the end of the loading arm 62 (64).
) pivots around the loading arm shaft 66 as a fulcrum under the action of the coil spring 68 (70), and the other end is pushed down. At this time, the drive shaft 20 and motor hub 22 of the spindle motor 18 slightly protrude from the center opening 24 of the Bernoulli plate 14, so that the floppy disk 12 placed opposite the spindle motor 18 has its hub 52 aligned with the magnet 54 relative to the motor hub 22. held by suction,
It enters a loading state (see Figure 5). In addition, in this loading state, the operation cam 80 and lock cam 82 provided on the loading shaft 72 allow
As described above, the loading shaft 72 can be mechanically locked.

Note that in the embodiments described above, the spring 100 can be omitted.

〔Effect of the invention〕

As is clear from the embodiments described above, according to the present invention,
The spindle motor is held by a support body, and a pair of opposing pins are provided on the support body, and via these pins, the spindle motor is vertically movably attached to a bracket fixed to the frame body. The loading arms are coupled to one end, and each of these loading arms is pivotally connected to a common loading arm shaft, which is always biased in the loading direction by a spring, and a loading cam is disposed at the other end of the loading arm. By attaching the loading cams to a common loading shaft, the spindle motor itself can be moved a fixed distance perpendicularly to the Bernoulli plate by rotating the loading shaft, making it easy to load and unload the front disc. and be able to do it properly.

Further, regarding the spindle position when loading is completed, height accuracy of the motor hub protruding from the Bernoulli plate and planar positional accuracy of the drive shaft relative to the magnetic head are required. Therefore, in the present invention, regarding the former point, two loading arms are used, and their points of action are placed on a straight line passing through the drive shaft of the spindle motor at equal distances from said shaft, and the three reference points of the frame are By placing one point on the surface on this straight line and placing the other two points at 120 degrees, the pressing force of each loading arm can be applied equally, thereby maintaining the height accuracy. . In addition, when the spindle motor moves until the loading is complete, the load balance is minimized by arranging the motor guide bearing coaxially with the motor shaft, and since side pressure is not directly applied to the motor guide bearing, the spindle motor moves smoothly. movement can be realized. On the other hand, regarding the latter point, in the present invention, the cylindrical part of the motor housing guided by the motor guide bearing can be smoothly moved to the straight part via the tapered part formed in the bearing without any dimensional difference. , its positional accuracy can be maintained.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various design changes can be made without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

FIG. 1 is a plan view of the floppy disk arrangement side of the floppy disk drive device showing an embodiment of the floppy disk motor loading device according to the present invention, and FIG. 2 is a schematic back view of the fluorocarbon and disk drive device shown in FIG. 1. Figure 3 is a cross-sectional side view of the main part of the motor loading device shown in Figure 1;
4 and 5 are cross-sectional side views of essential parts showing operating states of the motor loading device shown in FIG. 2, with FIG. 4 showing an unloading state and FIG. 5 showing a loading state. be. 10...Frame body 12...Fronpid disk 4...Bernoulli plate 1G...Stopper 18...Spindle motor 20...Drive shaft 22...Motor hub 24...
- Center opening 26...Long hole 28...Magnetic head 30...Motor housing cylindrical part 32...Motor rotor part 34...Support body 36, 38.40...Pin 4
2.44.46... Bracket 48... Pin insertion hole 50... Cartridge 52.
...Hub 54...Magnet 56...Motor guide bearing 58...Chee i" part 60...Straight part 62
．． 64...Loading arm 66...Loading arm shaft 68.70...
・Coil spring 72...Rope ink shaft 74.76...Loading cam 78...Operation lever 80...lH'lE cam 82
...Lock cam 84...Limit switch 86.
... Solenoid 88 ... Operating rod 90 ... Spring 92 ... Lock arm 94 ... Bearing 9
6...Cam for rotational displacement limitation 98...Lead wire bundle 100...Spring 102...Springs 103a, 103b, 103cm frame reference surface 10
4...Support reference plane

Claims (6)

[Claims] (1) A floppy disk housed in a cartridge is loaded, and a Bernoulli plate is arranged to face the floppy disk when the floppy disk is loaded, and a drive shaft that engages with and rotates the loaded floppy disk. A spindle motor and a magnetic head for appropriately moving each track of a rotationally driven floppy disk to read and write data, and an opening in the center of the Bernoulli plate through which a drive shaft of the spindle motor and a motor hub protrude. In the floppy disk drive device, the spindle motor is supported by a support, and the spindle motor is supported by a support, and the spindle motor is supported by a support body, and the spindle motor is supported by a support body, A pin is provided protrudingly on a part of the support body corresponding to a pair of side parts, and a pair of brackets are provided for inserting the pin of the support body and holding the pin in a vertically movable manner, and each pin of the support body is provided with a pair of brackets. one end of a pair of loading arms is coupled to the other end of the loading arm, and the other end of these loading arms is pivotally connected to a loading arm shaft inserted between the brackets, and act simultaneously on the other end of each of the loading arms. the loading cams are attached to a common loading shaft, an elastic member is provided for the loading arm to always keep the spindle motor in a loaded state, and a cylindrical part for supporting the spindle motor is provided in the frame. 1. A motor loading device for a floppy disk drive, characterized in that the motor loading device is configured to be fitted into a cylindrical portion of the spindle motor to guide movement of the spindle motor. (2) In the motor loading device according to claim 1, the elastic member that always maintains the spindle motor in a loaded state with respect to the loading arm is provided between each loading arm and each bracket, and between the opposing brackets. A motor loading device for a floppy disk drive device consisting of coil springs each attached via a loading arm shaft inserted therethrough. (3) In the motor loading device according to claim 1, a third pin is provided protruding in a direction perpendicular to the pair of opposing pins protruding from the support body, and this pin is inserted. A motor loading device for a floppy disk drive device, which is equipped with a bracket that holds the device so that it can move up and down. (4) In the motor loading device according to claim 1, the loading cam acting on the pair of loading arms comes into contact with the other end of the loading arm against elasticity due to the rotation of the loading shaft. A motor loading device for a floppy disk drive device configured to displace the spindle motor by lever action and move the spindle motor perpendicularly to its axial direction. (5) In the motor loading device according to claim 1, the cylindrical part provided in the frame is made of a motor guide bearing, and its inner peripheral surface has a two-stage structure consisting of a tapered part and a straight part, A motor loading device for a floppy disk drive device, wherein the planar positional relationship with respect to a magnetic head is such that a cylindrical portion of a motor housing that supports a spindle motor is regulated by the straight portion when loading of the floppy disk is completed. (6) In the motor loading device according to claim 1, the amount of protrusion of the motor hub is determined by the pressing force of the loading arm and the contact between the support reference surface of the spindle motor and the reference surface of the frame, and A motor loading device for a floppy disk drive device configured to have equal acting force on three reference planes of the body.