JPS6412021B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reel drive device for a tape recorder, tape player, etc., and is intended to stabilize wow and flutter performance.

FIG. 1A shows a conventional tape player reel drive device. In FIG. 1A, 20 is a motor attached to the base, and this motor 2
A pulley 21 is fixed to the rotating shaft of the motor. 2
2 is a roller rotatably provided on the base; 23;
Reference numeral 24 denotes a flywheel to which a capstan is fixed at the center, and a belt 25 is hung around the pulley 21, roller 22, and flywheels 23 and 24. When the motor 20 rotates counterclockwise, the flywheel 23 rotates counterclockwise and the flywheel 24 rotates clockwise. 26 and 27 are the flywheels 2, respectively.
Small gears 3 and 24 are formed, and 28 and 29 are reels with a reel shaft formed in the center, and these reels 28 and 29 are provided with play gears 30 and 31 via a slip mechanism. There is. 32,3
3 is an idler gear; one idler gear 3
2 is the small gear 26 of the flywheel 23 and the reel 2
The other idler gear 33 can mesh with the small gear 2 of the flywheel 24.
7 and the gear 31 of the reel 29.
Note that FIG. 1A shows a state in which the idler gear 32 meshes with the pinion 26 and the gear 30 of the reel 28, and in this state, the rotational force of the flywheel 23 is transmitted to the reel 28 via the pinion 26 and the idler gear 32. The reel 28 rotates counterclockwise. Conversely, when the idler gear 33 meshes with the small gear 27 and the gear 31 of the reel 29, the reel 29 rotates clockwise. 34 is an idler gear for fast forwarding, and this idler gear 34 tilts to the left or right when the fast forwarding FF mode or the fast returning REW mode is entered, and the idler gear 34 tilts to the left or right and connects the gear formed on the outer periphery of the flywheel 23 or 24 and the gear of the reel 28 or 29. The rotational force of the flywheel 23 or 24 is transmitted to the gear 30 or 31 via the idler gear 34, and the reel 2
8 or 29 rotates and the magnetic tape fast forwards FF
Or fast rewind REW.

FIG. 1B shows the flywheel 23 of the conventional reel drive device, and the flywheel 23 includes a small gear 26 in mesh with an idler gear 32 for play, and a portion 3 on which the belt 25 is hung.
5 and a gear 36 that meshes with an idler gear 34 for FF/REW is formed. The structure of the other flywheel 24 is also similar to the structure of the flywheel 23 shown in FIG. 1B. In this way, the flywheels 23 and 24 of the conventional reel drive device described above are
Since this requires three parts: the small gear 26, the part 35 on which the belt 25 is hung, and the gear 36, there is a limit to how thin the flywheels 23 and 24 can be made.

The present invention removes the pinion gears 26 and 27 of the flywheels 23 and 24 in the conventional example, and adds an FF/FF to the flywheel as shown in FIG.
By providing only the gear c ₁ in which the idler gears 18 and 19 for REW mesh, and the portion c ₂ on which the belt 14 is hung, it is possible to reduce the thickness.

This will be explained in detail below using Examples. In Fig. 3, 4 is a pulley connected to the motor shaft, 5, 6
is the capstan, 7, 8 is the flywheel, 9,
Reference numeral 10 denotes pinch rollers corresponding to the capstans 5 and 6, and the figure shows a state in which the pinch roller 9 is pressed against the capstan 5. Conversely, when the pinch roller 10 is pressed against the capstan 6, the pinch roller 9 separates from the capstan 5, and during high-speed winding and rewinding (FF/REW) and when the tape is not present between the capstans 5 and 6, both pinch rollers 9 separate from the capstan 5. It is assumed that the rollers 9 and 10 are separated from the capstans 5 and 6. 11 and 12 are reels, and 13 is an intermediate wheel, which is rotated by a belt 14 as shown by the arrow. 15 is a gear (or roller) provided coaxially with the intermediate wheel 13; 16 and 17 are gears 1
This is a play idler gear (or roller) that transmits the rotation of 5 to the reels 11 and 12. Although the mechanism is omitted, when the pinch roller 9 is pressed against the capstan 5, the relationship is as shown in Figs. 3 and 4. ,
Conversely, when the pinch roller 10 is pressed against the capstan 6, the relationship is as shown in FIG. Also, during high-speed winding and rewinding (FF/REW), FF/REW
If play idlers 18 or 19 also transmit the rotation of flywheels 7, 8 to reels 11, 12, the transmission between play idlers 16, 17 and reels 11, 12 is cut off, resulting in the relationship shown in FIG. .

With this configuration, the intermediate wheel 13 is responsible for driving the reels 11 and 12 during play, so the inertial energy of the flywheels 7 and 8 can be applied only to the capstans 5 and 6, improving the wow and flutter characteristics. At the same time, the structure of the flywheels 7 and 8 can be simplified, and the flywheels 7 and 8 can be made thinner.

Further, gears or rollers 16 and 17 are always in a rotating state with driving force from the intermediate wheel 13, and are tilted around the axis of the intermediate wheel 13 to switch the rotation of the reels 11 and 12. This allows for smooth switching. In particular, when formed in the form of a gear, it is possible to eliminate the problem that often occurs in systems using stationary idler gears, where the crests of the gears collide and become unable to mesh.

As is clear from the above embodiments, in the present invention, the pulley, flywheel, and intermediate wheel are rotatably supported at different fixed positions, so that the play idler gear (or roller) that is the rotational force transmission member is Regardless of the moving position of the belt, the state of contact between the belt and the flywheel and between the belt and the intermediate wheel is always constant, which stabilizes wow and flutter performance, and has the advantage of a long service life because the belt does not stretch or shrink. has.

[Brief explanation of drawings]

FIG. 1A is a schematic diagram of a conventional reel drive device, FIG. 1B is a side view of the flywheel of the same device, and FIG.
The figure is a side view of a flywheel according to an embodiment of the present invention, FIG. 3 is a configuration diagram of a reel drive device according to an embodiment of the present invention, and FIGS. 4 to 6 are main parts showing the driving force transmission state, respectively. FIG. 4... Motor pulley, 7, 8... Flywheel, 11, 12... Reel, 13... Intermediate wheel, 16, 17... Play idler.

Claims (1)

[Scope of Claims] 1. A motor rotatable in one direction, a pulley rotatably driven by the motor, two flywheels and an intermediate wheel rotatably supported at different fixed positions, the pulley, Two flywheels, one belt hung on the intermediate wheel, and two flywheels that tilt left and right around the axis of the intermediate wheel and transmit the rotational force of the intermediate wheel to the first or second reel. A reel drive device comprising a rotational force transmission member consisting of a play idler. 2 The rotational force transmission member consisting of a play idler is
A reel drive device according to claim 1, comprising two gears or rollers that always receive rotational force from an intermediate wheel.