JPS587507Y2 - Recording/playback device for disk-shaped recording media - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a recording/reproducing device for a disk-shaped recording medium, and in particular, a clutch device installed in the drive force transmission path from the drive section of the recording disk to the pickup section is used to fast-forward or fast-forward the pickup section. This pickup is configured such that a return drive source is connected in accordance with the operation of a clutch device to perform fast-forward and fast-reverse operations of the pickup section, and the drive source does not become a load when the pickup is used to record or reproduce a disc-shaped recording medium. An object of the present invention is to provide a recording/reproducing device for a disk-shaped recording medium having a fast-forward/fast-reverse mechanism.

Conventionally, this type of playback device uses the output from the drive unit of the disc-shaped recording medium, and some devices have a dedicated clutch to perform fast-forward and fast-reverse operations at a constant speed, while others have two dedicated clutches to perform high-speed fast forwarding and fast-reversing operations. There is a device that performs fast-forward and fast-reverse operations at two low speeds.

However, each of these requires a separate clutch, and since the output is obtained from the L drive source, the number of parts increases, making assembly difficult.

Since it is constantly rotating, it becomes a load on the turn tape ib drive motor.

There are other types that use a separate motor as a drive source, but this type of device has the disadvantage that this motor becomes a load during playback.

The present invention eliminates these drawbacks and provides a recording/reproducing device having a simple structure, requiring no separate clutch, and having a fast-forward/fast-reverse mechanism for the pickup section that does not cause a load during playback.

Now, the idea for getting off the train will be explained based on a drawing showing one embodiment.

Fig. 1 is a schematic diagram of a recording/playback device incorporating a fast forward/reverse pickup mechanism according to the present invention, in which 1 is an exterior case, 2 is a dust cover, 3 is a turntable, 4 is a pickup unit, and 5 is a power switch. , 6 is a play switch.

Next, an embodiment of the present invention will be described based on FIGS. 2 and 3.

The turntable 3 is attached to a boss 10 fixed to a main shaft 9 guided by a main bearing bracket 11 fixed to a base 43vC, and a drive motor 12
(belts etc. are not shown).

13 is an i-th worm gear fixed to the main shaft 9, and an i-th worm gear fixed to the i-th shaft 15 guided by a first bearing bracket 17 fixed to the base 43
The worm wheel 14 is engaged.

A second worm gear 16 is fixed to the first shaft 15VC, and a second worm wheel 18 fixed to the second shaft 20 guided by the second bearing bracket 20a fixed to the base 43 meshes with it. ing.

Reference numeral 19 denotes a first spur gear fixed to the second shaft 20VC, which meshes with a second spur gear 21v'C slidably attached to the first stepped shaft 22 fixed to the base 43.

A third spur gear 23 is slidably attached to a bearing boss 30 fixed to a base 43, and has serrated teeth 24 on its upper part.

A third shaft 27 25 is a disk having a serrated tooth 25a capable of meshing with the serrated tooth 24VC on the lower part and a crown gear 25b on the upper part, and is supported by the bearing boss 30 so as to be rotatable and slidable in the vertical direction. For example, the first
A pinion gear 26 is fixed, for example, by caulking, and is supported on the third spur gear 23 via a compression spring 28 and a sheet 29 made of, for example, Teflon, which has a low friction coefficient, and the first serrated teeth of the spur gear 23 24 and forms a clutch part.

39a is a clutch operating plate rotatably supported at a fulcrum 39b, biased by a tension spring 40, and rotationally restricted by a stopper (not shown).

One end of this clutch actuating plate 39a comes into contact with the aforementioned third shaft 27 to regulate the position of the shaft 27, and the other end is attached to a plunger 42aV7C of a solenoid 42 fixed to a base 43V7C, for example, the first wire 4.
1.

A fourth spur gear 31 has a pulley 32 around which a second wire 34a is wound, and is slidably supported by a second stepped shaft 33 fixed to a base 43. It meshes with the.

The second wire 34a wrapped around the pulley 321'C is fixed to the pickup section 4 at the side m34a of the pickup section 4.

Note that the pickup section 4 is guided by two guide rods (not shown).

A second pinion gear 35 is fixed to the motor 35BfC of the fast forward/fast reverse motor 36 and can mesh with the crown gear 25b.

The fast forward/reverse motor 36 is mounted on the base 43 with the spacer 3.
8 and is fixed by a mounting bracket 37.

Next, the operation of this embodiment will be explained.

The power switch 5 shown in FIG. 1 is in the state shown in FIG.
, play switch 6, fast forward switch 11, and fast reverse switch 8 are all turned off.

In this state, the lever that turns on the power switch 5, the drive motor 12 rotates, the turntable 3 rotates, and the i-th worm gear 13, the first worm wheel 14, the second worm gear 16, and the second worm wheel 18 are rotated. , 1st
through the spur gear 19, the second spur gear 21, and the third spur gear 2.
3 rotates at low speed.

At this time, the disc 25 is pushed up by the compression spring 28 to a position where the third shaft 27 is locked by the clutch actuating plate 39al/il:, and the rotation of the third spur gear 23 is not transmitted to the disc 25. The crown gear 25b meshes with the second pinion gear 35.

If the fast forward switch 7 is turned on here, the fast forward/fast reverse motor 36 rotates, and the fourth spur gear 31 rotates via the second pinion gear 35, the crown gear 25b1, the first pinion gear 26, and the pulley 32. rotates, and the pickup section 4 is rapidly forwarded in the direction of arrow A in the figure via the second wire 34a.

When the turned fast return switch 8 is turned on, the fast forward/fast return motor 36 is reversed, and the pickup section 4 is fast returned in the direction of the arrow in the figure through the above-mentioned position path as in the case of fast forward 9.

FIG. 3 shows a state in which the play switch 6 is turned on from the state shown in FIG.
1, the clutch actuating plate 39a rotates about the fulcrum 39b against the tension spring 40, the third shaft 27 is pressed, and the disk 25 fixed thereto is pressed against the compression spring 28. Ru.

Through this series of operations, the serrated teeth 25a of the disk 25 are
meshes with the serrated teeth 24 of the spur gear 23.

At the same time, as the disc 25 descends, the second pinion gear 35
The meshing of the crown gear 25b is released.

As a result, the third spur gear 23 enters the state i/l in FIG.
The low-speed rotation is transmitted to the disk 25, and is transmitted to the fourth spur gear 31 via the first pinion gear 26, and is transmitted to the second wire 34al/i via the boot IJ-32 which rotates therewith.
: The pickup unit 4 is moved in synchronization with the rotation of the turntable 3 in the direction of arrow l\force in the figure, and enters the recording/reproducing state.

Further, in the above explanation, the fast forward/reverse speed is assumed to be constant, but if a fast forward/reverse motor with a governor is used, two-stage fast forward/reverse at high speed and low speed can be achieved.

The disk-shaped recording medium recording/reproducing apparatus of the present invention can be implemented as described above, and the following effects can be obtained.

i) No special clutch is required for fast forwarding or fast reversing.

2) It can be used as an auto player or a manual player by attaching and removing the fast forward/reverse motors, and has excellent compatibility, so productivity is very high when producing both models.

3) The fast-forward and fast-reverse drive sources do not become a load during recording and playback.

4) Very simple structure and easy assembly.

5) Two-step fast forward and fast reverse at high and low speeds can be easily performed using a motor with a governor.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic diagram of a player having a fast-forward/fast-reverse mechanism according to the present invention, and FIGS. 2 and 3 are explanatory diagrams of the structure and operation. 3... turntable, 4... pickup section,
5...Power switch, 6...Play switch, 7
...Fast forward switch, 8...Fast reverse switch, 9.
・・Main shaft, 12・・Drive motor, 13・
... Worm gear, 14 ... Worm wheel L, 1
5--shaft, 16--worm gear, 18...
Worm wheel, 19... spur gear, 20... shaft, 21... spur gear, 22... stepped shaft,
23... Spur gear, 24... Serrated tooth, 25... Disc, 25a... Serrated tooth, 25b... Crown gear, 26... Pinion gear, 27... Shaft, 28
... Compression spring, 29 ... Seat, 31 ... Spur gear, 32 ... Pulley 33 ... Stepped shaft, 3
4a...Wire, 35...Pinion gear, 36.
...Fast forward/return motor, 39a...Clutch actuating plate, 40...Tension spring, 41...Wire,
42... Solenoid, 43... Base.

Claims (1)

[Scope of utility model registration request] a drive source that rotationally drives a turntable on which a disk-shaped recording medium is placed; a gear that is interlocked with the rotation of the turn tape A and has a first serrated portion on an upper portion; and a gear that has a first serrated portion on a lower portion thereof; a disc having a crown gear on the upper part and having a second serrated part that can be engaged with the tooth part; a reversible drive source for fast forwarding and reversing the pickup; and coupled to a drive shaft of the drive source. and a first pinion gear that can be engaged with the crown gear, and a pick-up fast forward and fast forward drive so that the second serrated tooth portion and the second serrated tooth portion are engaged during normal playback of the disc. a driving means for driving the crown gear to engage the first pinion gear during return;
a second pinion gear fixed to the rotating shaft of the disc;
A recording/reproducing device for a disk-shaped recording medium, comprising a gear that is always engaged with the second pinion gear and transmits the rotation of the second pinion gear as a driving force to a pick amplifier.