JPH04105848U - disk device - Google Patents

Abstract

(57) [Summary] [Purpose] To easily limit the position of an arm 27 that supports a drive pin 26 of a floppy disk device. [Structure] An arm 27 that supports a drive pin 26 inserted into a hole in a hub of a floppy disk is formed of a leaf spring. First and second protrusions 30 and 31 are provided at the distal end portion of the arm 27. The first protrusion 30 is arranged above the turntable 11, and the second protrusion 31 is arranged below the turntable 11.

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. 8 and 9. 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. 8 by a spring (not shown). When in use, the shutter 8 is moved to the left against this biasing 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. As another support mechanism for the drive pin, the drive pin is attached to the tip of a rotatable lever. The spring applies biasing force to the lever in the radial direction of the disk and the axial direction of the drive pin. There is also a mechanism for giving.

0004

[Problem that the idea aims to solve]

By the way, it is possible to limit unnecessary deformation of the leaf spring that supports the drive pin. It becomes necessary. In conventional disc devices, a limiting device was installed on the turntable side. This hindered efforts to make disk devices thinner and lower in cost.

[0005] Therefore, the purpose of this invention is to provide a disk device that can be made thinner and lower in cost. It's about doing.

[0006]

[Means to solve the problem]

The present invention to achieve the above object will be described with reference to the reference numerals in the drawings showing the embodiments. Then, it consists of a hub 2b and a recording medium sheet 2a fixed to this 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 10a is provided in the hub 2b with a certain positional relationship with the drive pin insertion hole 10a. A turntable 1 is used to rotationally drive a recording medium disk 2 provided with a 1 and the turntable 11 so as to be inserted into the spindle insertion hole 10a. There is sufficient space between the spindle 23 protruding from the center and the drive pin insertion hole 10b. The drive pin 26 is inserted with and a support arm 27 supporting the drive pin 26 so that the drive pin 26 can be rotated. In the disk device, the support arm 27 is made of a plate having spring properties, and The support arm 27 is supported by the turntable 11 in a cantilever manner. The front is configured to allow the driving pin 26 to be displaced in the axial direction along with the driving pin 26. A notch 34 is provided in the turntable 11, and a cutout 34 is provided in the front of the support arm 27. First and second protrusions 30, 3 are provided in the vicinity where the drive pin 26 is attached. 1 is provided, and the first protrusion 30 is connected to the cutout of the turntable 11. The second protrusion 31 is disposed above the peripheral edge of the notch 34, and the second protrusion 31 is located below the peripheral edge. The present invention relates to a disk device characterized in that it is arranged in a.

[0007]

[Effect]

The first protrusion 30 of the support arm 27 in the present invention allows the support arm 27 to move downward. The second protrusion 31 prevents the support arm 27 from moving upward. Limit displacement more than necessary.

[0008]

【Example】

Next, referring to FIGS. 1 to 9, a floppy disk device according to an embodiment of the present invention will be explained. Explain. As shown in Figure 6, the main parts of a floppy disk device include a disk suction stand and a motor. a turntable (rotary table or rotary plate) 11 that functions as both a rotor and a rotor; From the stator winding 12 of the motor and the circuit board 13 for installing this winding 12, etc. It has a disk drive part consisting of:

[0009] 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.

0010 As is clear from FIGS. 1 and 2, the turntable 11 has a hub 2b attached to it by suction. A hub adsorption magnet 21 made of a plastic magnet and a motor rotor. A rotor magnet 22 as a rotor is fixed thereto. This turntable 11 has a magnetic rotation The bush 2 is made of a magnetic metal plate to form a path, and the bush 2 is connected to the spindle 23. It is fixed at 4.

[0011] The rotating part consisting of the turntable 11 and the spindle 24 is mounted on the circuit board 13. It is rotatably supported by a bearing 25 provided in the.

0012 The drive pin 26 to be inserted into the hole 10b of the hub 2b is a 0.15 mm thick stem. It is attached near the tip of a support arm 27 made of a plate spring made of stainless steel or the like. . That is, the drive pin 26 includes a shaft 26a and a roller 26b rotatably attached to the shaft 26a. The shaft 26a is fixed to the support arm 27.

[0013] The support arm 27 has two holes 28, 29 and first and second protrusions, as shown in FIG. As shown in FIG. 3, the pin 32 inserted into the hole 28 and is fixed to the turntable 11. Note that the support arm 27 is a turntable. It is arranged on the upper surface side of the lever 11. Also, the pin 32 is caulked to the turntable 11. The support arm 27 is attached to the head 33 of the pin 32 and the turntable 11. is caught between. The hole 29 on the tip side of the support arm 27 is connected to the shaft 2 of the drive pin 26. This is for attaching 6a.

[0014] The first and second protrusions 30 and 31 of the support arm 27 have distal ends divided into two forked parts. , formed by bending one side upward and the other downward as shown in Figure 5. It is. The turntable 11 displaces the support arm 27 in the vertical direction (axial direction). It has an opening or notch 34 for allowing the The first protrusion 30 of the arm 27 is arranged, and the second protrusion 31 is arranged on the lower side. ing. That is, the first and second protrusions 30, 3 are arranged so as to sandwich the peripheral edge of the notch 34. 1 is placed.

[0015] The motor is a well-known three-phase axial gap type flat motor, and has 12 windings. is divided into 12 pieces and arranged opposite to the magnet 22 on the rotor side. Also, the illustration is Although not included, the three Hall elements necessary for controlling the motor are arranged facing the magnet 22. Further, a winding for detecting the rotational speed of the motor is provided on the circuit board 13. ing.

[0016]

【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 23 into the spindle insertion hole 10a of the hub 2b. , insert the drive pin 26 into the drive pin insertion hole 10b. Note that the drive pin 26 is connected to the hole 1. 0b, the support arm 27 is pressed downward by the hub 2b. is displaced downward with elastic deformation. If the amount of this displacement is large, the first The protrusion 30 contacts the turntable 11, and further displacement of the support arm 27 is prevented. limited. The motor is driven, the turntable 11 rotates, and the drive pin 26 and When the position matches the drive pin insertion hole 10b, the drive pin 26 is pushed by the hub 2b. The pressure is released, the drive pin 26 is displaced upward together with the support arm 27, and the drive pin is inserted. It enters the entrance hole 10b.

[0017] Immediately after the drive pin 26 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 35 of the hole 10b is not formed in an arc shape, and the spindle 23 From there, the distance decreases as it progresses clockwise, reaching a minimum at point D1. this Therefore, when the drive pin 26 moves clockwise in FIG. The drive pin 26 is pressed toward the center of the hub 2b. And drive pin 2 6 is pressed most strongly toward the center of the hub 2b when it touches point D1. At this time, The moving pin 26 also contacts the point D2 and transmits rotation to the hub 2b. Drive pin 26 and hub 2b is fully engaged, the component of force in the direction of pushing up the drive pin 26 is applied to the drive pin 26. As a result, the support arm 27 is also displaced upward. , the second protrusion 31 comes into contact with the lower surface of the turntable 11, thereby causing the second protrusion 31 to move upward. displacement is limited.

[0018] The biasing force required to keep the drive pin 26 in contact with the D1 point of the hub 2b is shown in Figure 4. As shown in FIG. This is achieved by arranging it closer to the spindle than the bottom of the portion 27a.

[0019] If configured as in this embodiment, the tip of the support arm 27 can be divided and bent. With this simple configuration, the position of the support arm 27 can be restricted. As a result, The disk device is made thinner and the motor stator winding 12 is placed close to the support arm 27. Even in the case where the support arm 27 comes into contact with the support arm 27, there is a problem that it may be damaged. do not have. Further, since a large displacement of the drive pin 26 is prevented, the hole 10b of the hub 2b This prevents the drive pin 26 from being unable to be inserted into the drive pin 26.

[0020]

[Modified example]

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

[0021] Without providing the first and second protrusions 30 and 31 at the tip of the support arm 27, It may be provided so as to protrude in the side direction of the arm 27. That is, in FIG. It may be provided below or above the pin attachment hole 29 as shown by the broken line.

[0022] The support arm 27 can be arranged on the lower surface side of the turntable 11.

[0023] The support arm 27 is rotatably attached to the pin 32, and the 1, a means for applying a biasing force in the counterclockwise direction may be added. This bias The means for providing can be mechanically constituted by a return spring. Also, this bias Magnetically remove the supporting arm 27 with magnets 21 and/or 34 or another dedicated magnet. It can be configured to suck in the circumferential direction.

[0024]

[Effect of the idea]

As is clear from the above, according to the present invention, the restriction on the position of the support arm can be reduced with less space. This can be achieved with a simple configuration. Therefore, it is important to make the disk device thinner. It becomes possible.

[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 an end view of the device of FIG. 1 taken along line A-A.

FIG. 3 is a cross-sectional view of a part of the device shown in FIG. 1, taken along line BB.

FIG. 4 is an enlarged plan view of the support arm.

FIG. 5 is a side view of the support arm of FIG. 4;

FIG. 6 is a front view showing the main parts of the floppy disk device.

FIG. 7 is an enlarged plan view showing the relationship between the hub and the drive pin.

FIG. 8 is a plan view of the disc cartridge.

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

[Explanation of symbols]

26 Drive pin 27 Support arm 30 First protrusion 31 Second protrusion

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).
In order to rotationally drive a recording medium disk (2) provided with a), a turntable (11) and a disk protruding from the center of the turntable (11) so as to be inserted into the spindle insertion hole (10a). spindle (2)
3), a drive pin (26) inserted into the drive pin insertion hole (10b) with a margin, and the drive pin (26)
and a support arm (27) supporting the drive pin (26) such that the drive pin (26) can be displaced at least in the axial direction thereof.
7) is made of a plate having spring properties and is cantilevered by the turntable (11), and the support arm (27) is attached to the drive pin (26) and rotates along the axis of the drive pin (26). A cutout (34) is provided in the turntable (11) to allow displacement in the direction, and a first and second protruding parts (30) and (31), the first protruding part (30) being arranged above the peripheral edge of the notch (34) of the turntable (11), A disk device characterized in that the second protrusion (31) is arranged below the peripheral edge.