JPH0814923B2 - Drive unit in magnetic recording / reproducing apparatus - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to recording a signal on an arbitrary track by moving a magnetic recording / reproducing head (hereinafter referred to as a magnetic head) in the radial direction of a rotating magnetic recording medium. A magnetic recording / reproducing device for reproducing a signal from an arbitrary track or both recording and reproducing, for example, holding a large number of magnetic recording media and automatically moving them to a recording / reproducing position for recording / reproducing. The present invention relates to a drive unit setting device particularly useful for a magnetic recording / reproducing device in which a magnetic recording medium can be exchanged.

2. Description of the Related Art Conventional Problems and Their Problems The electronic still camera (still video camera) that electronically shoots a subject and records the still image on a magnetic recording medium, and other magnetic recording devices and magnetic recording media. There are a magnetic reproducing device for reading out a still image signal and displaying it on a television, and a magnetic recording and reproducing device having both recording and reproducing functions.

In a conventional magnetic recording / reproducing apparatus, a base unit having a spindle for chucking and rotating a magnetic recording medium and a drive mechanism for the spindle is fixed. In addition to the spindle, the base unit also includes a magnetic head that comes into contact with the magnetic recording / reproducing area of the magnetic recording medium. The magnetic recording medium is loaded in a bucket that is vertically movable on the base unit. After loading the magnetic recording medium, the bucket is pushed toward the base unit and set at the recording / reproducing position. Subsequently, the regulation plate provided on the opposite side of the magnetic head with the set bucket interposed therebetween advances and contacts the magnetic recording medium in the bucket.

In each of these devices, only one magnetic recording medium was loaded. Therefore, when exchanging a magnetic recording medium which was being recorded or reproduced for another one, it was necessary to take out the set magnetic recording medium once and then mount another magnetic recording medium anew. Further, in the case where a large number of still images recorded on a plurality of magnetic recording media are sequentially reproduced for a long time, it is necessary to manually replace the magnetic recording media. The same applies when recording is performed over a plurality of magnetic recording media.

In order to perform these operations efficiently, it is desired to realize an apparatus (auto changer) having a function of automatically exchanging a plurality of magnetic recording media. The applicant proposed such an auto changer in the patent application (1) filed on the same day as the present application (same agent). This auto changer is equipped with a rotary plate capable of simultaneously holding a plurality of magnetic recording media. In order to set the magnetic recording medium at the recording / reproducing position, the vertical movement of the magnetic recording medium is indispensable assuming the above-mentioned conventional mechanism. Therefore, the entire rotating plate must be moved up and down, which complicates the configuration and takes time to replace the magnetic recording medium.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a drive unit setting device which is particularly useful for realizing a magnetic recording / reproducing apparatus capable of automatically and quickly exchanging a plurality of magnetic recording media. To aim.

Configuration, Action and Effect of the Invention A drive unit in a magnetic recording / reproducing apparatus according to the present invention includes a rotary drive apparatus including a motor for rotationally driving a magnetic recording medium, and a magnetic recording / reproducing magnetic head transfer apparatus. One drive unit and a first at one end
A first support pivotally attached by a shaft of a control plate, and a control plate including a control plate for holding the magnetic recording medium at a position facing the magnetic recording / reproducing head with the magnetic recording medium interposed therebetween. A second support body that supports a second drive unit having a mechanism and is pivotally attached at one end by a second shaft so that the second drive unit has a mechanism; and the center and center of the first shaft on the first support body; And a second gear fixed to the second support body such that the center of the second shaft coincides with the first gear and meshes with the first gear. And the first support at the other end of one of the first support and the second support.
Is provided with a swinging mechanism for moving the support body and the second support body close to and away from each other.

Here, the magnetic recording / reproducing device is a concept including a magnetic recording device, a magnetic reproducing device, and a magnetic recording / reproducing device.

According to the present invention, since the magnetic recording medium can be fixed and the first drive unit and the second drive unit can be moved so as to sandwich the magnetic recording medium from both sides thereof, chucking of the motor / spindle, It is possible to cause the magnetic head or the regulation plate to approach the magnetic recording medium. Therefore, when the drive unit according to the present invention is used, the automatic changer function can be obtained simply by performing the exchange operation of the magnetic recording medium, for example, the horizontal movement operation to or from the magnetic recording / reproducing position of the magnetic recording medium. Can be achieved. Moreover, in the drive unit according to the present invention, since the first support and the second support are oscillated synchronously, one drive source is sufficient to move the two supports, and the drive unit is magnetic. Since both sides of the recording medium are simultaneously approached or separated from both sides at the same time, the setting operation can be performed quickly.

According to the present invention, the synchronization mechanism is provided at one end of the first support and the second support, and the swing mechanism is provided at the other ends of the first support and the second support. It is provided. A magnetic head, a spindle motor, a regulating plate, etc. must be arranged, and therefore the central portion of the recording / reproducing apparatus having a complicated structure is simplified, and the first support and the second support are provided. And can be swung.

Since the synchronizing mechanism is composed of the first and second gears that are meshed with each other, when both the first support and the second support are close to each other, both supports are stably closed. Kept in.

Description of Embodiments Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 are schematic views showing the entire mechanical structure of the magnetic recording / reproducing apparatus. FIG. 1 is a plan view thereof, and FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3 shows the cross section along the line III-III in FIG. Further, in FIG. 1, the bucket 2 indicated by an arrow A is shown with a top plate cut away to show the video floppy F contained therein, and the bucket 2 indicated by an arrow B is composed of its bottom plate. The top plate has been cut away to show that the video floppy F has also been removed.

With reference to these drawings, a video floppy F (magnetic recording medium) mounted in the magnetic recording / reproducing apparatus 1 has a jacket 14 in which a magnetic disk 15 is rotatably housed. A disk hub (core) 16 at the center of the magnetic disk 15 is visible in the center hole 14c of the jacket 14. A window 18 for exposing the recording / reproducing area of the magnetic disk 15 to the outside is provided on a part of both sides of the jacket 14. The window 18 is normally closed by a shutter 19, but the shutter 19 is automatically opened by an opening / closing mechanism provided in the bucket 2 when it is inserted into the bucket 2 which will be described later. Further, holes 14d for receiving positioning pins 45, which will be described later, for fixing the video floppy F in the bucket 2 are formed in several places of the jacket 14.

A disk 10 for holding such a video floppy F is fixed to a gear 5 provided on a shaft 4. The shaft 4 is rotatably supported by a bearing base 9 mounted on a base 12. The pedestal 12 is fixed to the bottom plate 13.

The disk 10 is rotationally driven by the pulse motor 8.
The pulse motor 8 is mounted on a mounting member 11 fixed to a bearing stand 9 and a floor plate 13. The gear 6 provided on the output shaft 7 of the pulse motor 8 meshes with the gear 5, and transmits the driving force of the pulse motor 8 to the disc 10. The pulse motor 8 is characterized in that the rotation angle of the disk 10 can be accurately determined, but it goes without saying that a normal motor can be used if a limit switch for positioning is also used.

A plurality of (10 in the embodiment) buckets 2 for accommodating the video floppy F are fixedly provided on the disk 10. These buckets 2 are radially arranged at equal angular intervals on the same circumference. The outer end surface of the bucket 2 is fully opened for inserting the video floppy F (the opening position is indicated by 2b).

On one side of the bucket 2, a cutout 2a is formed in its upper surface plate and lower surface plate, and the position of this cutout 2a coincides with the position of the window 18 of the video floppy F mounted in the bucket 2. A window 10a is also formed in the disc 10 at a position corresponding to the cutout 2a. When the bucket 2 reaches the recording / reproducing unit 20 described later and the recording / reproducing operation is started, the regulating plate is passed from above through the notch 2a and the window 18.
27 enters and contacts the magnetic disk 15. Window from below
The magnetic head enters through 10a, the notch 2a and the window 18 and comes into contact with the opposite surface (recording / reproducing surface) of the magnetic disk 15.

Further, the bottom plate of the bucket 2 has a spindle 50, which will be described later.
Hole 2c for advancing and hole 2d through which positioning pin 45 passes
Is provided. Disc 10 corresponding to these holes 2c, 2d
There is also a hole (the hole corresponding to the spindle hole 2c is marked 10c).

The disk 10 is further provided with holes 10e at positions on both sides of each bucket 2 through which a position regulating pin 44 for a holder 26 described later passes.

A recording / reproducing unit 20 is provided at a predetermined angular position on the disc 10. Further, another predetermined angular position, for example, a position on the opposite side of the recording / reproducing section 20, is a detachable position of the video floppy F. The video floppy F is inserted through the opening 2b into the bucket 2 which has reached the detaching position by the rotation of the disc 10.
After the insertion, the video floppy F is locked by a lock mechanism (not shown) provided in the bucket 2. In this locked state, the opening 2b is closed. The bucket 2 may be pivotally attached at one end of the bucket 2 so that the bucket 2 rises diagonally with the opening 2 facing upward.

Next, the recording / reproducing unit 20 will be described with reference to FIGS. 4 to 6.

FIG. 4 is an enlarged plan view of the recording / reproducing unit 20 with a part cut away.

5 and 6 show the right side view of FIG. 4,
FIG. 5 shows a state during recording / reproducing operation, and FIG. 6 shows a state when the drive unit is opened. Further, the drive mechanism 30 is removed in FIG. Hereinafter, when referring to front and back and left and right, it is based on FIG.

The recording / reproducing unit 20 is surrounded by a frame 24 fixed to the bottom 13 on the front surface and both left and right side surfaces. flame
Shafts 42 and 43 are horizontally laid parallel to each other and rotatably at the rear portions of the left and right side plates (particularly indicated by reference numeral 24a) constituting 24. There are two gears 35 on the shaft 42 and 2 on the shaft 43.
The three gears 36 are fixed at regular intervals. These corresponding gears 35 and 36 mesh with each other. A cross member 25 whose both sides are bent downward is passed between front portions of both side plates 24a of the frame 24. The horizontal shaft 25 reinforces the frame 24 and stops swinging of the support plate 22 described later at that position.

Both sides of the support plate 21 holding the upper drive unit are bent downward to form side plates 21a. This side plate 21a
Is a rear extension arm and is fixed to the outer surface of the gear 35. The drive unit held by the support plate 21 is a regulation plate mechanism, and includes a regulation plate 27 and a holder 26 thereof. The restriction plate 27 is fixed to the holder 26, and the holder 26 is held by the support plate 21 by the coil spring 28. This spring 28
A hole 26e through which the position regulating pin 44 passes is formed at the mounting position of. Further, stopper pieces 21b horizontally extend from both left and right side plates 21a of the support plate 21.

The support plate 22 that holds the lower drive unit is a mounting member 29.
It is fixed to the gear 36 by. An oval hole 29a is formed in the arm portion of the mounting member 29, and the shaft 42 passes through the oval hole 29a. As will be described later, the mounting member 29 is driven to swing, but the oval hole 29a prevents interference with the shaft 42.

A large opening is opened in the center of the support plate 22, and a fixing member 23 is fixed so as to be located in this opening. The fixing member 23 is provided with a rotary drive unit for rotationally driving the magnetic disk 15 and a head transfer unit for transferring the magnetic head 54 in the radial direction of the magnetic disk 15. The rotary drive unit is a motor with a spindle 50.
51, a frequency generator 51a that outputs a signal of a frequency representing the number of revolutions of the motor 51, a board on which a control circuit of the motor 51 is assembled, and the like. The head transfer unit is a step motor
52, a mechanism for movably holding the magnetic head 54, a mechanism for converting the rotation of the step motor 52 into a linear motion of the magnetic head 54 (these mechanisms and the above-mentioned substrate are contained in a box 53), etc. Including. The spindle 50 and the magnetic head 54 of the motor 51 (indicated by a chain line in FIG. 4 but hidden behind the spindle 50 in FIG. 6) are fixed members.
It projects above 23. Further, a position regulating pin 44 and a positioning pin 45 are erected at appropriate positions on the fixing member 23. The position regulating pin 44 regulates the height and horizontal position of the regulating plate 27 and its holder 26 and is relatively long, and the positioning pin 45 determines the position of the video floppy F. The upper portion of each of the pins 44 and 45 is tapered and has a small diameter, and has a step portion for regulating the height position.

Sector gears 34 are fixed to the left and right front portions of the support plate 22. A stopper piece 22b is provided on the support plate 22 at a position facing the stopper piece 21b of the upper support plate 21. During the recording / reproducing operation, the stopper piece 21b of the support plate 21 and the stopper piece 22b of the support plate 22 are engaged with each other to support both support plates.
The swing of 21,22 is regulated mutually.

The upper support plate 21 and the lower support plate 22 described above are located above and below the disc 10, respectively. A drive mechanism 30 for oscillatingly driving these support plates 21 and 22 to bring the above-mentioned drive units respectively provided on the support plates 21 and 22 close to and away from each other will be described.

A shaft 40 is rotatably mounted on the front of the left and right side plates 24a of the frame 24. Gears 33 are fixed to the shaft 40 at positions corresponding to the sector gears 34, and these gears 33 mesh with the sector gears 34. The large diameter gear 32 is fixed to one of the two gears 33.

On the other hand, the drive motor 55 is attached to the
It is fixed at 24. The output shaft 56 of the motor 55 has a worm
37 is fixed. The worm gear 31a that meshes with the worm 37 is fixed to the shaft 41 at a predetermined distance from the gear 31b. The shaft 41 is a mounting member provided above the motor 55.
It is rotatably supported between 62 and the frame 24. The gear 31b meshes with the gear 32 described above.

When the motor 55 is driven from the state shown in FIG. 6 (the output shaft 56 rotates clockwise in FIG. 4), the worm gear 31a rotates via the worm 37, and the gear 31b coaxial with this also rotates. Rotate. The rotation of the gear 31b is transmitted to the gear 33 through the gear 32 fixed to the shaft 40. The gear 33 transmits the rotational force to the sector gear 34 meshed with the gear 33, so that the lower support plate 22 swings about the shaft 43 in the direction in which the front portion thereof faces upward. The rotation of the shaft 43 is generated by rotating the shaft 4 via the gears 36 and 35.
2, the upper support plate 21 swings about the shaft 42 in the direction opposite to the support plate 23, that is, in the direction in which the front portion thereof faces downward. Therefore, both support plates 21 and 22 move toward each other, and the drive units mounted on these support plates 21, 22 move closer to each other.

There is a part of the disc 10 between the two support plates 21 and 22.
A bucket 2 above 10 is positioned at the recording / playback position. The lower support plate 22 approaches the disk 10 from below, and the pin 45 passes through the hole of the disk 10 and the hole 2d of the lower surface of the bucket 2 and enters the hole 14d of the video floppy F to insert the video floppy F. Position. In addition, the spindle 50 is the disk 10
Through the hole 10c of the magnetic disk 15 and the hole 2c of the bottom plate of the bucket 2 and the hole 14c of the video floppy F.
The magnetic disk 15 is fitted into the disk 6, and the magnetic disk 15 is chucked by the spindle 50. Further, the magnetic head 54 is provided with an opening 10 in the disk 10.
a, It contacts the magnetic disk 15 through the opening 2a of the bucket 2 and the window 18 of the jacket 14. On the other hand, the upper support plate 21 also approaches the disc 10 from above. Pin 44 is a hole in disc 10
It projects upward through 10e and enters the hole 26e of the holder 26. Since the stepped portion of the pin 44 abuts on the peripheral edge of the hole 26e of the holder 26, the height of the holder 26 and thus the regulation plate 27 is regulated by this. The regulation plate 27 passes through the opening 2a of the bucket 2 and the window 18 of the jacket 14 and contacts the magnetic disk 15 from above at a position facing the magnetic head 54. This ensures good touching between the magnetic head 54 and the magnetic disk 15. In this way, the state shown in FIG. 5 is established and the magnetic recording / reproducing operation becomes possible.

The exchange of the video floppy F at the magnetic recording / reproducing position is performed as follows. After the magnetic recording / reproducing operation for a given video floppy F, when the drive motor 55 is rotationally driven in the opposite direction to the above, the upper and lower support plates 21 and 22 and the drive units provided on them are It moves in the direction away from each other and becomes the state shown in FIG. After that, the disk 10 is rotated by a predetermined angle, and the next video
The floppy F is brought to the recording / playback position. Then, the motor 55 is driven again, and the upper and lower support plates 21 and 22 move toward each other, resulting in the state of FIG. In this state, recording / reproducing is performed on the video floppy F brought to the recording / reproducing position.

In the above embodiment, the support plates 21 and 22 provided with the drive unit of the recording / reproducing unit 20 are the shafts 4 provided on the outer peripheral side of the disc 10.
It is fixed at 2,43 respectively. 7th in the center of the disk 10
An opening 10a is provided as shown in the figure, and recording / writing is performed in this opening 10a.
The reproducing unit 20 may be installed. The support plates 21 and 22 are driven to swing around the shafts 42 and 43 on the inner peripheral edge side of the disk 10. Disk 1
0 may be rotatably supported by upper and lower drive rollers and a circular guide (including a roller in some cases).

[Brief description of drawings]

1 to 3 show the entire mechanical structure of the magnetic recording / reproducing apparatus. FIG. 1 is a plan view thereof, and FIG. 2 is a sectional view taken along line II-II of FIG. Figure 3 is III of Figure 1.
FIG. 3 is a sectional view taken along line III-III. FIG. 4 is an enlarged plan view of the recording / reproducing portion, FIGS. 5 and 6 are right side views thereof, FIG. 5 shows a recording / reproducing operation state, and FIG. 6 shows a disc with a drive unit opened. The exchange operation states are shown respectively. FIG. 7 is a perspective view showing the outline of another embodiment. 1 ... Magnetic recording / playback device, 2 ... Bucket, 5,6,31a, 31b, 32,33,35,36 ... Gear, 8 ... Pulse motor, 10 ... Disc, 20 ... Recording / Reproduction part, 21 …… Support plate (upper side), 22 …… Support plate (lower side), 26 …… Holder, 27 …… Regulation plate, 30 …… Drive mechanism, 34 …… Sector gear, 37 …… Worm , 44 …… Position control pin, 45 …… Positioning pin, 50 …… Spindle, 51,52,55 …… Motor, 54 …… Magnetic head, F …… Video floppy.

Claims (1)

[Claims] 1. A first device including a rotary drive device including a motor (51) for rotationally driving a magnetic recording medium (F), and a transfer device (52, 53) for a magnetic recording / reproducing magnetic head (54). The magnetic recording / reproducing head with the magnetic recording medium (F) sandwiched between the first supporting body (22) which supports the driving unit of FIG. A regulating plate mechanism (26, 27, 26) including a regulating plate (27) for suppressing the magnetic recording medium (F) at a position facing the (54).
A second support unit (21), which supports a second drive unit having a second shaft and is pivotally attached at one end by a second shaft (42), and the first support unit (22). A first gear (36) fixed so that its center coincides with the center of the first shaft (43),
The first gear (3) is fixed to the second support (21) so that the center of the second shaft (42) coincides with the center of the second shaft (42).
6) and a second gear (35) meshing with the synchronizing mechanism, and the first support (22) and the second support (21)
Of the first support (2
A drive unit in a magnetic recording / reproducing apparatus, comprising a swing mechanism (31a, 31b, 32, 33, 34, 37, 55) for moving the second support (21) closer to and further away from the second support (21).