JPH01271961A - Chucking device for floppy disk driving device - Google Patents

Abstract

PURPOSE:To chuck plural types of FDs by providing an annular groove outside an adsorption magnet at the center of an upper face and providing a driving pin able to move from the groove in the direction of a center axis, a hub base having a window part to fit in the recessed part or center hole of a medium, a collet, etc. CONSTITUTION:When chucking an FD 2 with a metal hub, a collect 5 is not used and kept raised. In this case, the FD 2 is adsorbed by a magnet 1 on a hub base 4, a hub ring 13 fits in the annular groove 2, when the hub base 4 turns and a driving pin 3 coincides with a driving hole 11, the driving pin 3 fits into the driving hole 11 and the FD 2 is driven. On the other hand, when chucking an FD 1 with only a center hole, movable arm 7 is moved down, a projecting part 5a of the collet 5 is passed through the center hole of the FD 1 and fitted elastically in the annular groove 2 and the FD 1 is sandwiched with prescribed force by a holding part 5b and a contact part 4a of the hub base 4.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a floppy disk drive device (hereinafter referred to as F
Floppy disk (hereinafter referred to as FD)
This relates to a chucking device.

[Prior art and its problems]

Currently used FDs include FDIs with only a center hole, such as the 130mm FD stipulated in JIS C6291, and FDIs with a metal hub glued to the center hole.
There is D2.

The former type of chucking (clamping) of the FDI is performed by a hub stand and a collet placed opposite the hub stand.

On the other hand, the chucking mechanism of the latter FD2 with a metal hub does not use a collet, but is held and rotated only by a hub stand that has a magnet for attracting the metal hub and a drive pin that engages with a drive hole provided in the metal hub. There is.

The former FDI is housed in a flexible jacket, and the latter FD2 is housed in a hard case.The chucking mechanism of the FDD differs depending on the type of FD used, but the same Both types of FDD
cannot be used.

In addition, compared to the former FDI, the latter FD2 has better accuracy and stability than the former FDI chucking because the FD chucking positioning is the engagement of the metals of the drive hole and the drive pin. be.

This chucking accuracy and stability are essential requirements for increasing the specific capacity of FDDO, but the former FDI, for example 130
Since 111111FD is already distributed in large quantities on the market, the spread of the latter FD2 FDD is being hindered.

Therefore, the present invention combines the former FDI, which is generally distributed in large quantities, and the latter FD, which has excellent chucking accuracy and stability.
The aim is to provide a chunking device that enables the sharing of two devices.

[Means for solving problems]

The present invention has been made to solve the above problems, and the hub stand is provided with an adsorption magnet at the center of the upper surface, and an annular groove having an outer cylindrical surface is provided on the outside thereof.
A drive pin that can move axially toward the center from the annular groove and is biased in the direction of the medium, and a protrusion that fits into the recess or center hole of the medium are provided;
The knob is provided with a protrusion that elastically fits into the outer cylindrical surface, and a clamping surface that faces the clamping surface of the knob stand.

〔Example〕

For disaster relief purposes, Fig. 1 is a perspective view of Embodiment 1, and Fig. 2 is an enlarged cross-sectional view showing its main structure, where 4 is a hub stand fixed to a spindle 6, and 5 is attached to a movable arm 7. This is a collector rotatably attached to shaft 8.

The hub stand 4 has an annular adsorption magnet l provided on the four parts 4b provided in the center of the upper surface, and an outer cylindrical surface 2a on the outside thereof.
An annular groove 2 having an inner cylindrical surface 2b is provided to form a protrusion A in the center, and an inner cylindrical surface 2b of the annular groove 2 is provided.
It has a structure in which a drive pin 3 is provided which can move in the axial direction toward the center and is biased in the FD direction by a spring piece 9.

Further, the collet 5 has a structure including a convex portion 5a having an inclined surface 5b that elastically fits with the outer cylindrical surface 2a, and a clamping surface 5b facing the clamping surface 4a of the knob stand.

As shown in FIGS. 4 and 5, the metal hub-equipped medium FD2 used in this embodiment has a metal hub piece 12 having a drive hole 11 on the upper surface and a bubbling ring 13 on the lower surface.
The inner diameter of the bubbling 13 is equal to the inner cylindrical surface 2b of the annular groove 2.
The inner wall of the bubbling ring 13 has two surfaces 13 perpendicular to each other for positioning.
a, 13a are provided.

Note that the hub stand may be made of plastic containing magnetic powder, and the magnet portion may be formed by magnetization.

[Chucking cometal hub F of FD2 with metal hub
For chucking D2, as shown in FIG. 4, the collet 5 is not used and is held in the raised state.

In this case, the FD 2 with a metal hub is attracted by the magnet 1 on the hub stand 4, the bubbling 13 fits into the annular groove 2, and when the hub stand 4 rotates and the drive pin 3 aligns with the drive hole 11, the drive hole ll. A drive pin 3 is fitted inside to drive the FD 2.

[Chucking the FDI with only the center hole] Chucking the FDI is similar to the commonly used chucking device, as shown in FIG. It passes through the center hole and is elastically fitted into the annular groove 2, and the FDI is held between the holding part 5b and the holding part 4a of the hub stand 4 with a predetermined force.

Figures 7 and 8 show the second embodiment, respectively. Figure 7 shows the FD2' in a chucked state, and Figure 8 shows the FD
This shows a state in which I' is chucked.

The difference between this embodiment 2 and the above embodiment 1 is due to the difference in the structure of the FD, compared to the currently popular 3.5-inch FD2' in a hard case and the jacketed FDI with only a center hole. ' is considered to be used for both purposes.

That is, since the FD 2' has a structure in which the center hole 14 and the drive hole 15 are provided in the metal hub as shown in FIG.
This embodiment differs from the first embodiment in that a protruding shaft 17 (protrusion) that fits into the center hole 14 which also serves as a spindle is provided at the center hole 14 at 6, but the other structure is basically the same as that of the first embodiment.

Note that 1' is an adsorption magnet that also serves as a cradle for the FD 2'.

The chucking device configured as described above performs chucking with only the hub stand 16 as shown in Fig. 7 when using the FD2', and with the hub stand 16 as shown in Fig. 8 when using the FDI'. Chucking is performed with collet 5.

〔Effect of the invention〕

As described above, according to the chucking device according to the present invention, even if the FDI has only a center hole, the FD2 with a metal hub can
However, chucking is now possible, making it possible to use abundant distribution FDI and expand its use to FD2, which has high precision and stability and supports high density.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of Embodiment 1 of the present invention, Fig. 2 is an enlarged sectional view showing the main structure thereof, Fig. 3 is a plan view of the hub stand in Embodiment 1, and Fig. 4 is Embodiment 1. 5 is a sectional view taken along line XX, and FIG. 6 is an FD with only a center hole in Example 1.
FIG. 7 is a cross-sectional view of FD 2' with a metal hub in Example 2 when chuffing;
Figure 8 shows FDI of only the center hole in Example 2.
' is a sectional view when chucking. 1... Adsorption magnet 2... Annular groove 3... Drive bin 4... Hub stand 5... Collet

Claims (1)

[Claims] A suction magnet is provided at the center of the upper surface, and an annular groove having an outer cylindrical surface is provided on the outside of the magnet. It is characterized by comprising a hub stand having a protrusion that fits into the recess or the center hole, a convex part that elastically fits with the outer cylindrical surface, and a collet having a clamping surface facing the clamping surface of the hub base. floppy disk
Chucking device for drive equipment.