JPH04126345U - disk device - Google Patents

Abstract

(57) [Summary] [Purpose] To accurately obtain the desired spring action of the support arm 24 of the drive pin 23. [Structure] An axially elastic deformable portion 2 is attached to an arm 24 that supports a drive pin inserted into a hole in a floppy disk hub.
4c and a radially elastically deformable portion 24d. The axially elastically deformable portion 24c consists of a leaf spring portion parallel to the turntable, and the radially elastically deformable portion 24d comprises a leaf spring portion perpendicular to the turntable.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention uses microfloppy disks or similar disk cartridges. For further details regarding disk devices for recording or reproducing signals using relates to a drive pin support mechanism.

0002

[Conventional technology]

86mm (approximately 3.5 inches) in diameter, called a microfloppy disk. Magnetic disks and devices that use them to record or reproduce data are well known. . A floppy disk or magnetic disk cartridge 1 is shown in FIGS. 7 and 8. In this way, the recording medium disk 2 is housed in a rigid synthetic resin case 3. It is composed of The case 3 has an opening for inserting the head on both its front side 4 and back side 5. It has openings 6 and 7, and when not in use, these openings 6 and 7 are closed by a sliding shutter 8. It is closed. The shutter 8 is biased to the right in FIG. 7 by a spring (not shown). When in use, the shutter 8 is moved to the left against this eccentric force. this The disk 2 of the disk cartridge 1 is attached to the magnetic sheet 2a in the center thereof. The hub 2b is made of a metal disc. Disc 2 is rotated by pressing it with a clamper. Since the hub 2b is not intended to be exposed on the back side 5 of the case 3, there is an opening to expose the hub 2b only on the back side 5 of the case 3. A port 9 is provided from which the hub 2b is exposed. This hub 2b is a spindle A drive pin insertion hole 10a and a drive pin 10b are provided.

0003 The drive pin to be inserted into the drive pin insertion hole 10a is a cantilever-supported plate spring. It is attached to the tip and extends in the direction toward the center of the disc (radial direction of the disc). It is slightly displaceable and displaceable in its axial direction. Drive pin radius Directional displacement has meaning in order to maintain the desired positional relationship between the disk and this rotating mechanism. However, the axial displacement of the drive pin is due to the drive relative to the drive pin insertion hole 10a of the hub 2b. Allows pin insertion.

0004

[Problem that the idea aims to solve]

By the way, in the past, a single leaf spring was used to control the elastic displacement and deflection of the drive pin in the axial direction. Both radial and elastic displacements are obtained. The radial displacement of the drive pin is torsion of the support arm consisting of a leaf spring rather than by translation with respect to the handle The drive pin is tilted and contacts the hub 2b. However, excessive force is applied to the hub 2b, making it difficult for the drive pin to smoothly drive the disk 2. It may become possible.

[0005] Furthermore, in recent years, there has been a demand for thinner floppy disk devices. In response to this request If the height (axial length) of the drive pin is lowered in order to It gets caught on the edge of the hole 10b of the pin 2b, preventing accurate insertion of the drive pin into the hole 10b. This made it difficult to install the disc 2, and errors in mounting the disc 2 sometimes occurred.

[0006] Therefore, the purpose of this invention is to reduce the amount of protrusion of the drive pin from the turntable. To provide a disk device capable of reliably engaging a drive pin with a hub. It is in.

[0007]

[Means to solve the problem]

To achieve the above object, the present invention includes a hub 2b and a record fixed to the hub 2b. A spindle insertion hole 10 is formed approximately in the center of the hub 2b. a is provided and has a certain positional relationship with the spindle insertion hole 10a. Rotatingly drives the recording medium disk 2, which has a drive pin insertion hole 10b in the disk 2b. In order to insert the turntable 11 into the spindle insertion hole 10a. The spindle 22 protruding from the center of the turntable 11 and the drive The driving pin 23 inserted into the moving pin insertion hole 10b with a margin, and the driving pin 2 3 can be displaced in its axial direction and in the radial direction of the turntable 11. A disk device equipped with a support arm 24 supporting a drive pin 23. The portion 24a of the support arm 24 to which the drive pin 23 is attached and the support Between the arm 24 and the portion 24b that fixes the arm 24 to the turntable 11, the driving The main body of the turntable 11 is used to elastically displace the pin 23 in its axial direction. The plate spring portion 24c arranged parallel to the surface and the drive pin 23 are of the turntable 11 in order to elastically displace the table 11 in the radial direction. The feature is that a leaf spring portion 24d is provided perpendicularly to the main surface. This relates to a disk device that uses

[0008]

[Effect]

The support arm 24 in the present invention has a leaf spring portion 24 for vertical elastic displacement. c and the leaf spring portion 24d for obtaining radial elastic displacement of the drive pin 23 are independently Since the support arm 24 is twisted, the drive pin 23 is rotated in the radial direction. It becomes unnecessary to obtain displacement. As a result, the inclination of the drive pin 23 when driving the disk is reduced, no excessive force is applied from the drive pin 23 to the hub 2b, and the disc 2 rotates smoothly. Also, the amount of protrusion of the drive pin 23 from the turntable 11 The engagement of the drive pin 23 with the hole 10b of the hub 2b can be achieved reliably even if the can be done.

[0009]

【Example】

Next, referring to FIGS. 1 to 8, a floppy disk device according to an embodiment of the present invention will be explained. Explain. The main part of a floppy disk device is a disk suction stand, or tassel, as shown in Figure 5. A turntable (rotating table or rotary plate) 11, a motor 12, a motor 12, etc. are provided. It has a disk drive part consisting of a circuit board 13 for controlling the disk drive.

0010 The signal conversion magnetic heads 14 and 15 that contact the disk 2 are connected to the carriage 16 and the head. The support arm 17 is attached to the support arm 17. The arm 17 is locked by a leaf spring 18. It is rotatably supported by the carriage 16 and biased clockwise by a spring 19. has been done. When attaching cartridge 1 to the disk drive part, a pair of magnetic The arm 17 is forced counterclockwise so that a space is created between the heads 14 and 15. Rotated. The heads 14 and 15 are moved in the radial direction of the disk 2 by the moving mechanism 20. moved in the direction.

[0011] As is clear from FIGS. 1 and 2, the turntable 11 has a hub 2b attached to it by suction. A hub attracting magnet 21 made of a plastic magnet is fixedly attached thereto. This turntable 11 is made of a magnetic metal plate to form a magnetic circuit. It is fixed in the center with a spindle 22.

0012 The motor 12 is an outer rotor type, and as shown in FIG. These are fixed to the circuit board 13 by bearings (not shown). Supported. Stator winding 12b is arranged on circuit board 13.

[0013] The drive pin 23 to be inserted into the hole 10b of the hub 2b is made of stainless steel or the like. The support arm 24 is attached to the distal end portion 24a of the support arm 24 made of a leaf spring. That is, driving The movable pin 23 consists of a shaft 23a and a roller 23b rotatably attached to the shaft 23a. The shaft 23a is inserted into the hole 25 provided in the distal end portion 24a of the support arm 24, and is stopped. It is fixed by a fitting 26.

[0014] As is clear from FIGS. 3 and 4, the support arm 24 made of one metal plate is In addition to the tip portion 24a, a fixed portion has three mounting holes 27a, 27b, and 27c. 24b, and a plate spring portion that elastically deforms to have an axial component (hereinafter referred to as axial elastic (referred to as the elastic deformation part) 24c, and the elastic deformation part 24c has a radial component of the disk 2. a leaf spring portion (hereinafter referred to as radial elastic deformation portion) 24d, and an L-shaped portion 24e. The axially elastically deformable portion 24c can be turned like the fixed portion 24b. It is arranged parallel to the main surface of the table 11. This axial elastic deformation portion 24c is , since this horizontal width W1 is sufficiently larger than the thickness t, as shown by arrow 28 in FIG. When a force in the direction of arrow 28 is applied to the tip portion 24a via the drive pin 23, The tip portion 24a and the drive pin 23 are elastically deformed in the direction of the arrow 28. forgive the rank.

[0015] The radial elastically deformable portion 24d is bent at right angles to the axially elastically deformable portion 24c. It consists of a bent part and is arranged perpendicularly to the main surface of the turntable 11. There is. The vertical width W2 of this radial elastic deformation portion 24d is greater than this thickness t. Large enough that vertical stiffness is extremely large and vertical spring action is ignored can do. However, the radial elastic deformation portion 24d is When the tip portion 24a is pressed in the direction shown by the arrow 29 in FIG. A highly rigid L-shaped portion between the elastically deformable portion 24c and the radially elastically deformable portion 24d. It is elastically deformed toward the center of the turntable 11 with the portion 24e as a fixed end.

[0016] The L-shaped portion 24e is a horizontal portion 30 that is an extension of the axial elastic deformation portion 24c. and a vertical portion 31 which is an extension of the radially deformed portion 24d. Since the stiffness is extremely large in this direction, there is virtually no elastic deformation in either direction. Not shaped. Similarly, the tip portion 24a also has a horizontal portion 32 and a vertical portion 33. The shape is highly rigid and virtually elastically deformable in either direction. do not.

[0017] The support arm 24 is attached to the lower surface side of the turntable 11. That is, , insert the protrusions 34 on the bottom of the turntable 11 into the holes 27a and 27b, and swage them. As a result, the support arm 24 is fixed to the underside of the turntable 11. Na The spindle 22 is inserted into the hole 27c. Drive pin 23 is a turntable It protrudes above the turntable 11 through an opening 25 formed in the turntable 11 .

[0018]

【motion】

When recording or reproducing, the hub 2 of the disc 2 is placed on the turntable 11. Place the part b, and insert the spindle 22 into the spindle insertion hole 10a of the hub 2b. , insert the drive pin 23 into the drive pin insertion hole 10b. Note that the drive pin 23 is connected to the hole 1. 0b, the support arm 24 is pressed downward by the hub 2b. The axially elastically deformable portion 24c is elastically deformed downward, and the drive pin 23 is also displaced downward. Ru. The motor 12 is driven, the turntable 11 rotates, and the drive pin 23 and drive When the position matches the pin insertion hole 10b, the drive pin 23 is pressed by the hub 2b. The drive pin 23 is released, and the drive pin 23 moves above the axial elastic deformation portion 24c of the support arm 24. As the pin returns, it is displaced upward and enters the drive pin insertion hole 10b.

[0019] Immediately after the drive pin 23 is inserted into the hole 10b of the hub 2b, it is at the position indicated by the chain line in FIG. be. The outer circumferential edge 36 of the hole 10b is not formed in an arc shape, and the outer circumferential edge 36 of the hole 10b is From there, the distance decreases as it progresses clockwise, reaching a minimum at point D1. this Therefore, when the drive pin 23 moves clockwise in FIG. The drive pin 23 is pressed toward the center of the hub 2b. This allows support The drive pin 23 is elastically deformed in the radial elastically deformable portion 24d of the arm 24. is displaced in the disk radial direction, and a good positional relationship between the hole 10b and the drive pin 23 is maintained. be done. Then, when the drive pin 23 touches point D1, it is located most toward the center of the hub 2b. Pressed hard. At this time, the drive pin 23 also contacts point D2 and transmits rotation to the hub 2b. reach The support arm 24 receives the return force (outward deflection) of the radially elastically deformed portion 24d. force) to keep the drive pin 23 in contact with the point D1 of the hub 2b.

[0020] The inclination of the drive pin 23 at the start of disk drive and during disk drive is caused by radial elasticity. It is reduced by the action of the deformed portion 24d, so the advantages explained in the action section cannot be obtained. It will be done.

[0021]

[Modified example]

The present invention is not limited to the above-mentioned embodiments, but can be modified as follows, for example. It is.

[0022] As shown in FIG. 9, the radial elastic deformation portion 24d may be formed into an arcuate planar shape. I can do that.

[0023] As shown in FIG. 10, the radial elastic deformation portion 24d is arranged on the fixed portion 24b side. , the axially elastically deformable portion 24c may be disposed on the distal end portion 24a side.

[0024] The turntable 11 can be formed integrally with the yoke of the rotor of the motor 12. Wear. The motor 12 may be of an inner rotor type.

[0025] The radially elastically deformable portion 24d is folded above the surface of the axially elastically deformable portion 24c. It can be made up of bent parts.

[0026]

[Effect of the idea]

In this invention, a part for elastically displacing the drive pin in the axial direction and a drive Since the part for elastically displacing the pin in the radial direction and the part for elastically displacing the pin are provided independently, each It becomes possible to accurately and easily set the displacement and return force in this direction. Also , the inclination of the drive pin when driving the disk is reduced, so the hub of the drive pin This enables smooth engagement with the disk and smooth rotation of the disk. Also, the drive pin Ensures disc engagement with the hub even if the amount of protrusion from the disc table is small. becomes possible to achieve.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a rotational driving portion of a disk device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the device shown in FIG. 1 taken along line A-A.

FIG. 3 is a plan view of the support arm of FIG. 1;

FIG. 4 is a perspective view of a portion of the support arm.

FIG. 5 is a front view showing the main parts of the floppy disk device.

FIG. 6 is an enlarged plan view showing the relationship between the hub and the drive pin.

FIG. 7 is a plan view of the disc cartridge.

8 is a bottom view of the disk cartridge of FIG. 7. FIG.

FIG. 9 is a plan view showing a support arm of a modified example.

FIG. 10 is a plan view showing a support arm of a modified example.

[Explanation of symbols]

23 Drive pin 24 Support arm 24a Tip part 24c Axial elastic deformation part 24d Radial elastic deformation part 24e L-shaped part

Claims (1)

[Scope of utility model registration request] 1. Consisting of a hub (2b) and a recording medium sheet (2a) fixed to the hub (2b), a spindle insertion hole (10a) is provided approximately in the center of the hub (2b), and the spindle A drive pin insertion hole (10) is provided in the hub (2b) in a certain positional relationship with the insertion hole (10a).
b) In order to rotationally drive a recording medium disk (2) provided with a turntable (11), a turntable (11) protruding from the center of the turntable (11) so as to be inserted into the spindle insertion hole (10a). spindle (2)
2), a drive pin (23) inserted into the drive pin insertion hole (10b) with a margin, and the drive pin (23).
and a support arm (24) supporting the drive pin (23) such that the drive pin (23) can be displaced in the axial direction thereof and in the radial direction of the turntable (11). ) of the drive pin (2
3) and the part (24a) on which the support arm (2) is attached.
4) to the turntable (11) (2)
4b) between the turntable (11) to elastically displace the drive pin (23) in its axial direction.
A leaf spring portion (24c) arranged parallel to the main surface of
and the drive pin (23) to the turntable (11).
A disk device characterized in that a leaf spring portion (24d) is provided perpendicularly to the main surface of the turntable (11) for elastically displacing the turntable in the radial direction.