JPS5996558A - Magnetic disc device - Google Patents

Abstract

PURPOSE:To use only one power source by detecting the insertion of a magnetic disc, switching the power transmission of the rotating power source by using a means interlocking with the operation of a switching lever interlocking with the transfer of the magnetic disc to clamp the disc and also switching the power transmission in the direction of clamp discharging by a disc discharging switch. CONSTITUTION:A photoswitch 62 detects the insertion of the magnetic disc and generates an insertion signal and a motor 34 starts to rotate simultaneously. The rotation is transmitted to a worm gear 36 through an output shaft 35, starts the rotation of a roller 40 through bevel gears 38, 39, a gear 43, a coupling gear 45, and a gear 44 and transfers the disc 23 in the direction of an arrow (a). When the leading end of the disc 23 is contacted with a bending part 52c of a switching lever 52, a worm wheel 49 engaged with a lack gear 57 of the switching lever 52 starts to rotate in the direction of (b). Rotation of a cam 51 rotates a lever 58, a supporting arm 28 is pushed down by the lever 58 and the disc 23 is clamped by a center cone 30.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device configured to automatically load and eject magnetic disks into the device.

BACKGROUND ART Conventionally, a magnetic disk drive (6) has been known which is configured so that a magnetic disk can be automatically loaded into and ejected from the magnetic disk drive.

A conventional magnetic disk device of this type has a power source that drives a transfer means for transferring the magnetic disk from an insertion slot through an access section where recording β is generated, and a clamping device that clamps the magnetic disk to a rotational drive mechanism. Separate and independent power sources were used.

The control operation of the conventional structure having such two power sources will be explained using FIG. 1 and FIG. 2.

FIG. 1 is a block diagram of the control circuit 1. In FIG. 1, the reference numeral 1 indicates a control section. A return detection section 4, a clamp completion detection section 5, and a magnetic disk ejection switch 6 are connected.

A motor drive circuit 7 is connected to the master control section 1, and a command from the motor drive circuit 7 drives a motor 8 for transporting a magnetic disk, thereby driving a magnetic disk transfer mechanism section 9.

Generally, a clamp drive circuit 10 with a single clamp rule is connected to the control section 1, and a clamp mechanism section 12 is driven by a clamp drive motor 11 driven by this motor and the drive circuit.

Figure 2 d, Thai J. Qi v-1.
In the figure, 2S to 6S are shown in FIG. 1, respectively.

8 and 1 indicate the belief from the production department with the same code.
1 indicates the drive timing signal of the transfer motor and the clamp 21.1. , First, when a magnetic disk is inserted, the magnetic disk insertion detection unit 2 detects this and detects it (i-'42S is generated as shown in FIG. 2, and at the same time, the transfer motor 8 starts rotating forward 'j'').
Ru.

When the magnetic disk is transferred into the apparatus and the transfer is completed, a detection completion signal 3s is generated from the magnetic disk transfer completion detection section 3, and the rotation of the transfer motor 8 is stopped in response to this signal. Same 11, in the dark, clamp drive motor 11
starts rotating. When the clamp completion is detected by the clamp completion detection section 5, the clamp completion signal 55
occurs, the clamp drive motor 11 stops, and the magnetic disk loading operation is completed.

Subsequently, magnetic recording is carried out, and when the time has come to eject the magnetic disk, the magnetic disk ejection switch 6 is pressed, and this signal causes the clamp drive motor 11 to rotate in the reverse direction, releasing the clamp on the magnetic disk. Ru. When the clamp mechanism returns to its initial state, this is detected by the two-lamp mechanism return detection section 4, a return signal 4S is generated, and the clamp drive motor 11 is stopped.
The transfer motor 8 starts rotating in reverse and ejects the magnetic disk.

Then, when the magnetic disk JJ1 is ejected and the magnetic disk insertion signal 2S turns off, the transfer motor 8 stops.
, the ejection operation of the magnetic disk is completed.

If a double-connected structure is adopted, the control circuit and control timing will be complicated because two power sources are used in the magnetic disk drive, and the number of parts will also increase, making the device larger. Atsulko.

Purpose of the present invention The present invention has been made to eliminate the drawbacks of the prior art as described in A-42. The purpose is to provide disk devices.

Embodiment FIGS. 3 to 8 show an embodiment of the present invention. In the figures, the reference numeral 20 d is a frame of the device, and on both left and right sides of this frame 20, the ←L111 plane is 5F. Guides 21 and 22 are formed in a rectangular shape, and a magnetic disk 23 housed in a flat case is guided along these guides 1-21 and 22.

Stoppers 24 and 25 are protruded from predetermined positions between the guides 21 and 22 to restrict the insertion limit of the magnetic disk 23 to be mounted.

Reference numeral 26 denotes a helad arm, which is provided on a key V ridge (not shown) that is rotated by a drive mechanism 27 and moves in the left-right direction in FIG. 3.

Head arm 260 lower rule, illusion 1, trill, 1%
The support ground of the center cone is shaped like a U-shape.
28 are arranged. The base end of the support arm 280 is fixed to the frame 20 via a leaf spring 29, and a center cone 30 is provided on the lower surface of the free end. This support - earth, 281r:I, leaf spring 2
9, the center cone 30 is forced to rotate in the direction in which it constantly obtains information and moves.

A front panel 31 is provided at the edge of the frame 20 opposite to the drive device 27, and a magnetic disk is formed on the front panel 31 side.

A frame 32 is partially provided at a position closer to the front panel 31 side. Also, the front panel 31
A magnetic disk ejection switch 33 is attached to a position near one side of the cassette insertion slot.

-, the automatic loading/discharging motor 3 is located at the position where the frame A 32 , i= and is closer to the ejection switch 33 side.
4 is fixed, and the output side 135 has a Uono
Gear 36 is fixed. The output shaft 35 has a pair of left and right '
It is rotatably supported by 1111 supports 37.37.

A bevel gear 38 is fixed to the outer end of the output 11i1+135, and this bevel gear 38 meshes with another bevel gear 39.

The bevel gear 39's il+ is disposed in a rectangular position I7 with the output shaft 35, and its rotation +1ill+Kit gear 43 is fixed at the end opposite to the bevel gear 39.

Corresponding to this gear V43, gear 44 is II! Ill 41
The rollers 40 are fixed to the shaft 41.

42 is the Qlt receiver of the Φ mountain 41. Gears 43, 44 mesh with coupling gear 45.

The coupling gear 45 is rotatably supported on one shaft at one end of the gear 7, 46, and the gear frame 46 is rotatably supported in the middle on a fulcrum 4T.

This fulcrum 47 is rotatably mounted on a bearing 48.

On the other hand, a worm wheel 49 is rotatably supported via +ll+ 50 at a position where it can mesh with the worm gear 36, and as is clear from FIG. It is a toothless gear with no teeth formed.

On the upper side of the worm wheel 49, a cam 51 is fixed coaxially with the ll+ 50 and has an inclined upper surface as shown in FIG. Then C1 this cam 5
When the gear fly is in contact with 1.46 ta, +
M is growing.

-15,') Ohmwheel 49's Uono, Gear 36
On the opposite side, a switching lever 52 is connected to the output shaft 3 of the motor 34.
It is placed parallel to 5. Elongated holes 52a and 521 are formed at the front and rear of the υ exchange bar 52 in the longitudinal direction, and guide pins 53 are inserted into these elongated holes, respectively.
．． 54 are fitted. These guide pins 53.54
is provided protrudingly on the upper frame 32.

Further, a spring 56 is stretched between the end of the switching lever 52 on the front panel 31 side and a protrusion 55 protruding from the upper frame 32, so that the switching lever 52 is always on the front panel 31 side. It gives them a migratory habit. Further, a rack gear 57 is formed on the side edge of the switching lever 52 on the worm wheel 49 side to maintain a predetermined pressure jjjjlJ.

Note that the end edge of the switching lever 52 on the drive device 27 side forms a bent portion 52C that is bent downward.

On the other hand, the reference numeral 58 is a lever, and one end of this lever is attached to the worm wheel 49 (7) 1411IK.
It is in contact with the cam surface of the fixed cam 50, and the other end is in contact with the protruding piece 28a'' on the free end side of the support arm 28, and in the middle is a support rotatably supported by a bearing 59. It is fixed to the shaft 60.

A microswitch 61 is provided below the lever 58 to detect the clamp release state.

Note that a photoswitch 62 for detecting insertion of the magnetic disk 23 is provided near the roller 40.

FIG. 7 is a block diagram of a control circuit applied to the present invention.
In the figure, the same parts as in FIGS. 3 to 6 are designated by the same reference numerals.

That is, the control unit 63 includes a photoswitch 62 for detecting insertion of a magnetic disk, a microswitch 61 for detecting completion of clamping, and a magnetic de-flash ejection switch 33.
is connected, and when the motor drive circuit 64 is driven in response to a command from the control section 63, the motor 34 for loading and unloading the disc is rotated, and the magnetic disk transfer mechanism section 65 and clamp mechanism section 66 are rotated. Driven.

Next, the operation of this embodiment configured as follows will be explained with reference to the timing chart shown in FIG.

When a magnetic disk is inserted from the front panel 31 side as shown by arrow a in FIGS. 3 and 4, the magnetic disk is detected by the first switch 62 and a magnetic disk insertion signal 625 is generated. occurs, and at the same time, the motor 34 starts rotating in the forward direction and is transmitted to the ohm gear 36, and the roller 40 starts rotating via the bevel gears 38, 39, gear 43, coupling gear 45, and gear 44. The inserted magnetic disk 23 is transported by this roller 40 in the direction of arrow a. Then, the magnetic disk 23 is transferred and its tip is connected to the switching lever 5.
When it comes into contact with the bent portion 52C at the inner end of the
2 is advanced against the tension of the spring 56. Accordingly, the worm wheel 49 that meshes with the rack gear 57 of the switching lever 52 starts rotating in the direction of arrow 1). This state is shown in FIG.

However, since a part of the worm wheel 49υ is missing teeth, the tooth section of the worm wheel starts to engage with the worm gear 36, and at 1, the worm wheel 52t moves forward. do.

When the worm wheel 49 and the worm gear 36 start meshing, the rotation of the worm gear 36 (r, 1 - is transmitted to the worm wheel 49, and the worm wheel 49 starts rotating together with the force 1151).

As the cam 51 rotates, when the higher surface of the cam 51 comes into contact with one end of the lever 58, the lever 58 is rotated around the shaft 60 as shown by the arrow d in FIG. The support arm 28, which has been given an upward rotational habit, is pushed down by the other end of the lever 58, and the center cone 30 supports the magnetic disk 2.
Clamp 3. On the other hand, one end of the gear frame 46 changes its contact position from the higher surface of the cup 51 to the lower surface, and the coupling gear 45 is moved by the tension of a spring (not shown) to the fulcrum 47. ,
The driving force from the motor 34 is no longer transmitted to the roller 40, and the magnetic disk 23 is stopped from being transported and is clamped at that position.

In this state, V'J: Of course, the rack gear 57 of the switching lever 52 is 16 degrees apart from the wheel 47.

Further, in FIG. 5, when the lever 58 is turned clockwise four times, the first microswitch 61 is turned on, and clamping is completed (no. The reconnaissance action is completed.

In this way, the magnetic disk is loaded, magnetic recording,
After the 1f raw is finished, when you want to eject the magnetic disk 23' (L-), press the magnetic disk eject switch 33, the magnetic disk eject signal 33S is generated, and the motor 3
4 starts the reversal.

When the motor 34 rotates in the opposite direction, the worm wheel 49 meshing with the worm gear 26 rotates in the direction of arrow e as shown in FIG. is rotated in the opposite direction.

As a result, the support arm 28 escapes from the restraint of the lever 58 and moves upward due to the elastic force of the leaf springs 29, 29, thereby breaking the clamp. Meanwhile, the coupling gear 45 descends again and starts meshing with the two gears 43 and 44, and the roller 40 starts rotating in the opposite direction, sending out the magnetic disk 23 in the ejecting direction as shown by arrow f in FIG. . Then, the magnetic disk insertion signal 625 of the magnetic disk 23 turns off.
The motor 34 also stops, and the operation of ejecting the magnetic disk 23 is completed.

In this state, the front edge of the IT magnetic disk is at the predetermined 'd'r' from 11 disk insertion on the front panel 31.
,P,! Since If protrudes, the user can easily pull it out from the magnetic disk insertion slot by pinching it with his or her fingers.

In this way, by using only one drive source 4, it is possible to perform the operations of loading, ejecting, and clamping the magnetic disk.

Effects As is clear from the above explanation, according to the present invention, there is provided a switching lever that detects insertion of a magnetic disk and interlocks the transmission of power from one power source that is rotated with the transfer of the magnetic disk. A clutch mechanism consisting of a coupling gear interlocked with the operation of the magnetic disk and a gear that meshes with the clutch mechanism is used to perform the clamping operation of the magnetic disk, and by operating the magnetic disk ejection switch, the clamp ejecting operation is performed. Since it adopts a structure that allows switching in the direction in which it is performed, loading, ejecting, and clamping operations of magnetic disks can be performed with just one power source. The control circuit can be simplified.

4 1711 in Figure 1 - Explanation Figures 1 and 2 are block diagrams and timing charts of control circuits explaining the conventional structure, and Figures 3 to 8.
The figures are for explaining one embodiment of the present invention. Fig. 3 is a plan view of the main part, Fig. 4 is an enlarged plan view of the main part explaining the clamping operation, and Fig. 5 is a fllU 1rri view of the wall part. , FIG. 7 is a block diagram of the control circuit, and FIG. 8 is a timing chart.

20...Frame 21.22...Guide 23
...Magnetic disk 24.25...Stopper 28.
・Support earth ・30...Center cone 31...
Front panel 32... Upper panel 33... Magnetic disk ejection switch 34... Motor 35... Output 136.
...Worm gear 38.39...Bevel gear 40...
・Roller 43. ．． 44...Gear 45...
・Coupling gear 46 ・Gear frame 49...Worm wheel 51...Cam 52...Switching lever
56...Spring 58...Lever 6
1... Microsinchiro 2... No A1.
, 4 (, so /-.

%, i'r Applicant Canon Electronics Co., Ltd. 17 ``1!j!f+f4 Mr. Commissioner ■,'' 1981 Patent Application No. 205516 2,
Name of the invention: Magnetic disk device 3, negative 1j, il:, Relationship with the 11 cases in which the patent was issued Name: Canon Electric Co., Ltd. 4, agent
Telephone: 03 (268) 2481 (Detailed description of the invention in the detailed description section Drawing 6, Contents of the amendments Contents of the amendments as shown in the attached sheet) "Time chart" on page 3, line 7 of the specification Correct to J.

2) "8 and I" from page 3, line 9, 11 to line 10, 11
IJ is corrected to 8s and 11sJ.

3) Corrected "rotation" in "1" in line 1 of page 6 to "movement J," and changed "rotation" in line 1 to "movement J" in line 10 [center cone
...Correct ``direction'' to ``two directions'' and correct ``cassette'' in line 1 to ``magnetic disk'' in the 18th line.

4) Correct "Cam 50" in the 13th ID of page 9' of 1 to "Cam 51".

5) In the figures, Figures 2, 3, and 8 are corrected as shown in the attached sheet.

Claims (1)

[Claims] A magnetic disk device equipped with a mechanism for automatically loading and unloading magnetic disks, comprising a transfer means for transferring the magnetic disk, a means for clamping the magnetic disk, and a single power source for driving the transfer means and the clamping means. and a clutch means for switching power from the power source between the transfer means and the clamp means in conjunction with the magnetic disk transfer means.