JPS62270055A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To position a center core to a prescribed position of a driving shaft by pressing the center core to the driving shaft relatively with a regulating member when the driving shaft is pushed up by a driving means while the center core of a recording sheet is inserted and fitted to the driving shaft. CONSTITUTION:While an upper cover 43 is released, a magnetic sheet pack 21 is inserted from a magnetic sheet pack inserting port into an inner packet, thereafter, by closing the upper cover 43, a regulating plate holder 58 and a magnetic sheet pack 21 are positioned with positioning pins 59 and 69 and a center core 23 of a magnetic sheet 22 is inserted and fitted to a driving shaft 44. Next, when a solenoid 67 is operated and the driving shaft 44 is shifted in the upper direction, a cylinder part 62 of a core pushing member 61 as a regulating member is abutted to the core 23, the core 23 is shifted relatively in the lower direction of the driving shaft 44, an attraction yoke 33 is attracted to a center core attraction magnet 68 and the sheet 22 can be positioned to the prescribed position of the shaft direction of the driving shaft 44.

Description

Detailed Description of the Invention 3. The detailed description of the invention relates to a machine groove for securely attaching a magnetic sheet, which is a recording sheet, to a rotational drive shaft of an apparatus.

<Prior art> Recently, objects have been photographed purely electronically by combining ocular imaging devices such as solid-state @image elements and eye tubes with recording devices that use magnetic sheets, which are inexpensive and have a relatively large storage capacity, as recording media. Electronic still camera systems have been developed and are attracting attention, in which still images are recorded on a rotating magnetic sheet and the images are reproduced using a separate television system or printer.

The magnetic sheets used in such systems are usually in the form of magnetic sheet packs. A magnetic sheet pack rotatably stores a magnetic sheet for magnetically recording still image information, etc., and is used by being attached to a rotating magnetic sheet device built into an electronic camera.

In an image recording or reproduction system using such a magnetic sheet, a magnetic sheet with a diameter of about 50 mm is used, and this magnetic sheet has a recording pattern of 1 track to 52 tracks from the outer circumferential side to the inner circumferential side. are formed in high density. In such a rotating magnetic sheet device, the feeding pitch of the magnetic head is about 100 μm, which is much smaller than the feeding pitch of a normal floppy disk, and therefore the magnetic sheet must be positioned with respect to the FI1 head with extremely high precision.

Fig. 4 is a plan view of this type of magnetic sheet pack used in a rotating magnetic sheet device, and Fig. 5 shows a state in which the magnetic sheet is attached to the drive shaft of the rotating magnetic sheet device.V-V in Fig. 4 This is a cross-sectional view along the line. As shown in FIG. 4, the magnetic sheet pack 21 has a substantially rectangular shape, and a magnetic sheet 22 on which still image information and the like are recorded is rotatably housed inside. A center core 23 as a reinforcing member is provided in the center of the magnetic sheet 22, and the center core 23 is exposed to the outside through a circular central opening 24 of the magnetic sheet pack 21. A polygonal mounting hole 25 into which the rotational drive shaft of the rotating magnetic sheet device is inserted is bored in the center core 23, and a slit 26 is provided along one edge of the mounting hole 25. The rotational drive shaft is pressed against the three mutually facing sides of the mounting hole 25 by the action of the spring, and their centering is performed.

Roughly speaking, a window 27 in which a magnetic head is located is opened in the magnetic sheet pack 21, and this window 27 for the magnetic head is opened and closed by a slideable shutter 28. That is, the shutter 28 closes the window 27 to prevent dust from adhering to the magnetic sheet 22 before the magnetic sheet pack 21 is loaded into the rotating magnetic sheet device, and also closes the window 27 to prevent dust from adhering to the magnetic sheet 22 when the magnetic sheet pack 21 is loaded into the rotating magnetic sheet device. The shutter 28 moves downward in FIG. 4 to open the window 27, allowing recording and reproduction on the magnetic sheet 22. Zarani, magnetic sheet pack 2
1 is provided with a hole 30 for positioning.

On the other hand, a magnet is used as a means for removably fixing the magnetic sheet 22 to the rotational drive shaft. That is, as shown in FIG. 5, the drive shaft 3 of the rotating magnetic sheet device
A magnet 32 is embedded in the flange portion 31 a of the magnetic sheet 22 , and an attraction yoke 33 made of a magnetic material is fixed to the center core 23 of the magnetic sheet 22 . is removably fixed. In addition, the magnetism of this magnet 32 is connected to the PG yoke 34.
The magnetic sheet 22 is also guided to the upper surface of the center core 23, and this is used to determine the rotational angle of the magnetic sheet 22.

<Problems to be solved by the invention> Drive the center core 23 of the magnetic sheet 22! ! 71 When inserting into the shaft 31, the drive @31 is pressed by the spring force of the sleeve 26 of the center core 23 for centering as described above, which creates some resistance. On the other hand, since the magnetic sheet 22 has some play in the direction of its rotational axis relative to the magnetic sheet pack 21, the magnetic sheet pack 22
1 is loaded into the rotating magnetic seal device, the suction yoke 33 of the center core 23 does not come into close contact with the flange portion 31a of the drive shaft 31 due to the resistance due to the spring force of the center core 23, and the distance from the magnet 32 is too large. The attraction yoke 33 cannot be attracted by the attraction force of the magnet 532, and as a result, the magnetic sheet 22 flaps up and down with respect to the rotating surface, producing abnormal noise and failing to obtain a good head touch, which prevents recording. , a situation occurs where sufficient reproduction is not possible. In order to prevent this, when loading the magnetic sheet pack 21 into the rotating magnetic sheet device, the center core 23 is pressed against the flange portion 31a of the drive shaft 31, and the suction yoke 33 is placed in close contact with the flange portion 31aG. A so-called center core pushing operation is required to hold and fix the core by force. This center core pushing operation is performed by sandwiching the center core 23 and driving the center core 23.
This is done by pressing the center core 23 toward the flange portion 31a of the drive shaft 31 with a center core pushing member provided at a position facing 4A31. Conventionally, this center core pushing member pushes the magnetic sheet pack 21 into the rotating magnetic sheet It is configured to move in conjunction with the movement of the lid that is opened and closed when loading the device, and when the lid is closed, the center core pushing member is driven to push the center core. However, if the center core pushing member presses the center core 23 during driving rotation of the magnetic sheet 22, it will not only cause rotational resistance but also damage the center core 23. It must be away from the center core 23. In other words,
The center core pushing member is required to engage with and press the center core 23 in the process of closing the lid, and to be separated from the center core 23 when the lid is completely closed. There was a problem that the structure of the section was complicated.

The present invention solves the above problems without complicating the structure of the lid opening/closing mechanism, and it is an object of the present invention to provide a recording/reproducing device that can press the center core.

Means for Solving the Problems> To achieve the above object, the present invention has a drive shaft into which a center core of a recording sheet is inserted and which rotationally drives the recording sheet and reciprocates in the axial direction; a shaft drive means for pushing up the drive shaft in the axial direction; and a shaft drive means for regulating the position of the center core when the drive shaft is pushed up by the shaft drive means to direct the center core relative to the drive shaft means. and a regulating member that positions the center core at a predetermined position in the axial direction of the drive shaft by pressing the center core.

Function> With the center core of the recording sheet inserted into the drive shaft,
When the drive shaft is pushed up by the shaft drive means, the center core is relatively suppressed by the drive shaft by the regulating member, and the center core is positioned at a predetermined position in the axial direction of the drive shaft.

<Example> Fig. 1 shows a cross-section of the main parts of a recording/reproducing apparatus according to a first embodiment of the present invention, Fig. 2 shows a perspective view of the whole thereof, and Fig. 3 shows a recording/reproducing apparatus according to a second embodiment of the present invention. This is a cross-sectional view of the main parts of the playback device.

As shown in FIG. 2, the recording/reproducing apparatus of the present invention is comprised of a main body 41, an inner packet 42, and a top cover 43. A spindle motor 45 equipped with a drive shaft 44 that rotationally drives the magnetic sheet 22 as a recording sheet and reciprocates in the axial direction is disposed approximately in the center of the apparatus main body 41, and is adjacent to the spindle motor 45. A carriage 47 carrying a magnetic head 46 is supported slidably in the radial direction of a magnetic sheet 22 mounted on a spindle motor 45. A feed screw 49 that is rotationally driven by a head feeding stepping motor 48 is screwed into the carriage 47 .
8 positions the magnetic sheet 22 of the magnetic head 46 in the radial direction.
Still image information can be recorded or played back track by track.

Further, a pair of brackets 50 are provided at the ends of the device main body 41, and the inner packet 42 and the upper lid 43 are attached to the brackets 50 via pins 51 so as to be openable and closable. The upper M43 has a shape that can accommodate the inch packet 42, and a spring (not shown) is attached to the device body 41.
is biased in the opening direction. Roughly speaking, a spring (not shown) is disposed between the upper lid 43 and the inner packet 42 to exert a spring force in a direction to separate them from each other, so that the upper M43 as shown in FIG. In the open state, the inner packet 42 is connected to the main body 41 of the device.
The magnetic seat back insertion slot 52 of the inner packet 42 is opened apart from the upper lid 43.

Further, the inner packet 42 is provided with openings into which a drive shaft 44, a magnetic head 46, a regulation plate 60 (to be described later), a core pushing member 61, positioning pins 59, 69, etc. can be inserted.
The slide key 53 is attached to the front edge of the upper M43 and is biased to the right by a spring 55.
A retaining pin 56 that engages with the notched groove 53a is attached. Therefore, when the upper M43 is closed, the stop pin 56
contacts the slide key 53 and slides it to the left against the spring force of the spring 55, and with the upper M43 closed, the stop pin 56 engages the notch groove 53a of the slide key 53.

It is fitted inside and locked. Further, when the slide key 53 is moved leftward from this state and the stop pin 56 is removed from the cutout groove 53, the upper M43 is opened.

Further, a regulating plate holder 58 is attached to the back surface of the upper lid 43 via a pair of brackets 57. A positioning hole 58a is bored in the regulation plate holder 58, and as shown in FIG.
A positioning pin 59 provided upright is fitted into the hole 58a, and the regulating plate holder 58 is positioned. Regulating plate holder 5
A regulating plate 60 is fixed to 8 for stably contacting the magnetic sheet 22 and the magnetic head 46, and the regulating plate 60 holds the magnetic sheet 22 between the magnetic sheets 22 and the magnetic head 46 when the regulating plate holder 58 is positioned. They are now facing each other. Further, a core pushing member 61 as a regulating member υ1 is attached to the regulating plate holder 58 at a position facing the drive shaft 44.

The core pushing member 61 has a concave portion 63 having the same diameter as the drive shaft 44 at the center of the cylindrical portion 62 .

On the other hand, the base end side of the drive shaft 44 of the spindle motor 45 is connected to shaft drive means. That is,! ! The Il driving means consists of a spring 66 and a solenoid 67. The spring 66 engages with the flange 44a of the drive shaft 44 to urge the drive shaft 44 toward the proximal end (downward in FIG. 1), while the solenoid 67 is in contact with the base end of the drive shaft 44, and the operation of the solenoid 67 causes the drive shaft 44 to move toward the distal end side (upward in FIG. 1) against the spring force of the spring 66. When the drive shaft 44 moves upward, the tip of the drive shaft 44 touches the core pushing member 6.
1, the center core 23 of the magnetic sheet 22 comes into contact with the cylindrical part 62, and the center core 23 is pressed below the drive shaft 44. The solenoid 67 is controlled by a control device (not shown), and is activated when, for example, the upper M43 is closed.
When the is rotating, the operation should be released.

In the figure, reference numeral 68 is a magnet for attracting the center core, and reference numeral 69 is a back positioning bin provided in the main body 41 of the apparatus.

Therefore, according to such a configuration, the magnetic seat back 21 is inserted into the inner packet 42 from the magnetic seat pack insertion opening 52 with the upper lid 43 open, and then the upper M43 is closed, and the positioning bin 59.69 The regulation plate holder 58 and the magnetic sheet pack 21 are positioned, and the center core 23 of the magnetic sheet 22 is inserted into the drive WA 44. Next, when the solenoid 67 is activated to move the drive shaft 44 upward, the cylindrical portion 62 of the core pushing member 61 comes into contact with the center core 23, and the center core 23 moves relatively below the drive shaft 44 to attract the center core. The attraction yoke 33 is attracted to the magnet 68, and the magnetic sheet 22 is driven! It is positioned at a predetermined position in the axial direction of ll144.

Next, a second embodiment of the present invention will be described based on FIG. Components that are the same as those shown in FIG. 1 are designated by the same reference numerals.
! ! The explanation will be omitted.

The illustrated device has a pack presser spring 81 attached to a regulating plate holder 58 as a regulating member.

When the drive shaft 44 is moved upward by the operation of the solenoid 67, the magnetic seat back 21 is pressed by the pack presser spring 81, the gap S between the magnetic seat back 21 and the center core 23 disappears, and the center core 23 is moved against the magnetic seat back 21. You will be pushed. As a result, center core 23
The attraction yoke 33 of is attracted to the center core attraction magnet 68,
The magnetic sheet 22 is positioned at a predetermined position in the axial direction of the drive shaft 44 .

In the above embodiment, a spring 66 and a solenoid 67 are used as the shaft driving means, but a motor or the like may also be used.

<Effects of the Invention> The recording/reproducing device of the present invention can easily perform the center core pushing operation of the recording sheet without complicating the structure of separate opening/closing structures or increasing the size of the device. With this mechanism, the center core can be reliably positioned at a predetermined position on the drive shaft.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part of a recording/reproducing apparatus according to a first embodiment of the present invention, FIG. 2 is a perspective view of the whole thereof, and FIG. 3 is a main part of a recording/reproducing apparatus according to a second embodiment of the present invention. 4 is a plan view of a magnetic sheet pack used in a recording/reproducing device, and FIG. 5 is taken along the v-v line in FIG. FIG. In the drawings, 21 is a magnetic sheet pack, 22 is a magnetic sheet, 23 is a center core, 61 is a core pressing member, 66 is a spring, 67 is a solenoid, and 81 is a back pressing spring.

Claims (1)

[Claims] a drive shaft into which the center core of the recording sheet is inserted and rotates the recording sheet and reciprocates in the axial direction; a shaft drive means for pushing up and driving the drive shaft in the axial direction; and a drive shaft driven by the shaft drive means. a regulating member that positions the center core at a predetermined position in the axial direction of the drive shaft by regulating the position of the center core when the shaft is pushed up and relatively pressing the center core toward the drive shaft means; A recording and reproducing device equipped with.