JPS6213246Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reel stand drive device for a tape recorder.

Generally, devices for driving a reel stand include devices that use a friction wheel or devices that use gears.

In the former case, the reel stand is driven quietly, but since it is operated by using the contact pressure between the reel stand and the friction wheel, the reel stand, the friction wheel, or both may be deformed due to wear. Sisters,
In the latter case, the above-mentioned drawbacks of the former are eliminated;
In the case of the one shown in ``Tape Drive Mechanism'' in No. 114877 (Patent Application No. 54-48206), the lever supporting the gear is interposed between the main chassis and the flywheel. The disadvantage is that the overall thickness of the device is large and assembly, maintenance, and inspection are difficult.

The present invention has been devised based on these shortcomings, and provides a reel stand drive device for a tape recorder that makes use of the characteristics of the gear described above, has less gear noise, and can solve the drawbacks of the prior application mentioned above. This is what we intend to provide.

An embodiment of the reel stand driving device according to the present invention will be described in detail below with reference to the accompanying drawings.

Of the attached drawings, FIGS. 1 to 4 are top views showing the stop mode, playback mode, fast forward (FF) mode, and rewind (REW) mode of the apparatus according to the present invention, and FIG. FIG. 1 is a sectional view taken along line X-X' in FIG. 1;

In these figures, the supply reel stand 2 is rotatably inserted into the supply reel shaft 1a fitted in the main chassis 1, and is prevented from coming off the supply reel shaft 1a by a stopper 3. Reference numeral 2a designates a gear portion of the supply reel stand 2, which is arranged so as to mesh with a fast forward/rewind (FF/REW) slip gear (transmission wheel for high speed running) 23, which will be described later, to transmit rotation. The take-up reel stand 4 is rotatably inserted into the take-up reel shaft 1b fitted in the main chassis 1, and is prevented from coming off by a stopper 5. Reference numeral 4a designates a gear portion of this take-up reel stand 4, which meshes with a gear portion 6a of an idler gear 6 and a gear portion 11a of a slip gear 11, which will be described later. The idler gear 6 is rotatably inserted into an idler gear shaft 1c fitted in the main sheath 1, and its gear portion 6a meshes with the gear portion 4a of the take-up reel stand 4 described above.
The regeneration operating arm (constant speed running operating arm) 8 is rotatably inserted into the take-up reel shaft 1b, and
It is arranged below the take-up reel stand 4. and,
The boss portion 8c of this arm 8 is the main chassis 1
The shaft 8a is located within the escape hole 110 provided in the shaft 8a.
is inlaid in the center. A felt 10 is mounted on the regeneration gear 9 which is pivotally supported on the shaft 8a, and a slip gear 11 rotatably inserted into the boss portion 9b of the regeneration gear 9 faces thereon, and the slip surface of the gear 11 faces the regeneration gear 9. 11b is pressed against the felt 10 by the spring 12, and the reaction force of the spring 12 is applied to the boss portion 9b.
It is received by a spring receiver 13 that is press-fitted into the spring supporter 13.

In this state, the slip gear 11 is configured to rotate integrally with the regeneration gear 9 with a certain slip torque. This combination is rotatably inserted into the shaft 8a and prevented from coming off by a stopper 8b. Regeneration gear 9
The gear portion 9a is disposed so as to be able to mesh with a gear portion 16a of a drive gear 16, which will be described later, as the regeneration operating arm 8 pivots. The angle 14 is attached to the lower surface of the main chassis 1 with a screw 14b and is provided with a boss 14a.
A driving wheel 16 is attached to a shaft 15 fitted to this boss 14a.
is inserted rotatably and is prevented from coming off by a stopper 15a. The internal gear portion 16b of the drive wheel 16 is arranged to mesh with a transmission gear 19, which will be described later, and a drive belt 30, which is engaged with a pulley groove 28a of a flywheel 28, which will be described later, is engaged with the pulley groove 16c. It is configured to transmit the rotational force of the flywheel 28.

Fast forward/rewind (FF/REW) operating arm (high-speed running operating arm) 17 is the main chassis 1
It is rotatably inserted into the fulcrum shaft ID fitted into the fulcrum shaft ID, and is prevented from coming off by a stopper 18.
The boss portion 17c is the main chassis 1.
The boss portion 17c is located within the escape hole 100 of the escape hole 100, and in the FF mode, the boss portion 17c is located within the abutment portion 10 of the escape hole
0b and in the REW mode, the contact part 10
It is arranged so as to be in contact with 0a. The gears are arranged so that the gears mesh properly in this abutting state. The felt receiver 21 is a rotary shaft 2 that is pivotally supported on the bearing portion 17c of the FF/REW operating arm 17.
0, and a felt 22 is attached to the upper surface thereof, and an FF/REW slip gear 23 supported rotatably on the rotating shaft 20 is rotatably supported on the upper surface, and the slip surface 23 of the gear 23 is
b is biased by a spring 24 so as to press against the felt 22, and the reaction force of the spring 24 is received by a spring receiver 25 which is press-fitted and fixed to the rotating shaft 20, and rotates integrally with the rotating shaft 20 with a certain slip torque. configured to be possible.

The transmission gear 19 is press-fitted and fixed under the aforementioned rotating shaft 20 on the lower surface of the main shear sea 1, rotates integrally with the rotating shaft 20, and is FF/REWed by the slip torque generated by the biasing force of the felt 22 and the spring 24. Rotate the slip gear 23. The gear portion 23a of the FF/REW slip gear 23 is arranged to be able to mesh with the gear portion 2a of the supply reel stand 2 and the gear portion 6a of the idler gear 6. The transmission gear 19 is the drive gear 16
It is arranged so that it can mesh with the internal gear part 16b of.

Capstan metal 26 is main chassis 1
It is attached with a set screw 26a to rotatably support a capstan shaft 27. The flywheel 28 is constructed integrally with the capstan shaft 27, and the drive belt 30 is engaged with the pulley groove 28a as described above. Also, flywheel 2
8 is a motor 32 attached to the belt hanging portion 28b and the main chassis 1 with a screw 32b.
The transmission belt 3 is connected between the motor pulley 32b and the motor pulley 32b.
1 is engaged, and the rotational force of the motor 32 is transmitted from the flywheel 28 to the drive wheel 16. The fly angle 29 is attached to a set screw 29a on the main shear sea 1 to prevent the capstan shaft 27 from coming off from the capstan metal 26.

The present invention is constructed as described above,
The effect will be explained below.

[Stop mode → Play mode]

In the stop mode shown in FIG. 1, the rotational force of the motor 32 is transferred to the flywheel 2 via the transmission belt
8 and from this flywheel 28 to the drive wheel 16 via a drive belt 30. In this state, by operating the playback operation means (not shown), the recording/playback head (not shown) comes into contact with the magnetic tape (not shown), and the pinch roller (not shown) moves to the capstan shaft 2.
7 and rotates to feed the magnetic tape. Further, in parallel with this, when the regeneration operating arm 8 is rotated in the direction of arrow A in FIG.
a and the gear portion 9a of the regeneration gear 9 begin to mesh, and the rotational force of the drive wheel 16 is transmitted to the slip gear 11 via the felt 10. Then, since the gear portion 11a of the slip gear 11 and the gear portion 4a of the take-up reel stand 4 are engaged with each other, the take-up reel stand 4 rotates and can take up the aforementioned magnetic tape (not shown) at a low speed. The boss portion 8c of the regeneration actuating arm 8 is the contact portion 110 of the main shear sea 1.
The regeneration operating arm 8 is appropriately held by the regeneration operation means at the position where it abuts on the regeneration operation arm 8 (the position where the meshing relationship is proper - FIG. 3), and enters the regeneration mode. In this embodiment, all gear transmission is used, but the same effect can be obtained even if the external gear portion 16a of the drive wheel 16 and the gear portion 9a of the regeneration gear 9 are replaced with rollers (friction wheels).

To switch from the regeneration mode to the stop mode, the regeneration operating arm 8 may be rotated back in the opposite direction of arrow A by operating a stop operation means (not shown).

[Stop mode → FF mode]

Next, FF mode will be explained.

In the state shown in Fig. 1 [stop mode], the driving vehicle 1
6 is rotating as described above, but since the internal gear portion 16b and the transmission gear 19 are not engaged with each other, the transmission gear 19 does not rotate.

In this state, when the FF operating means (not shown) is operated, the FF/REW operating arm 17 rotates in the direction of arrow B as shown in FIG.
The internal gear portion 16b of the idler 6 and the transmission gear 19, and the gear portion 6a of the idler 6 and the gear portion 23a of the FF/REW slip gear 23 begin to mesh, and the rotational force of the drive wheel 16 is transferred from the transmission gear 19 to the rotating shaft 20.
This is transmitted and rotates the FF/REW slip gear 23 via the felt 22. Then, this FF/
Since the gear part 23a of the REW slip gear 23 meshes with the gear part of the idler gear 6, the idler gear 6 rotates, and the gear part 4 and the idler gear 6 rotate.
The take-up reel stand 4 engaged at point a rotates at high speed in the direction of the arrow to wind up the magnetic tape. The rotation of the FF/REW actuating arm 17 is achieved through the escape hole 10 in the boss portion 17c.
The FF moves until it comes into contact with the contact portion 100b of 0.
The FF mode can be obtained by holding the position by operating means (not shown).

To obtain the REW mode, the FF/REW operating arm 17 is rotated in the direction of arrow C by operating the REW operating means, and the slip gear 23 is engaged with the gear portion 2a of the supply reel stand 2; Since this is the same as in FF mode, detailed explanation will be omitted. However, idler gear 6 is not required in REW mode.

Note that this FF or REW mode can be canceled by operating the stop operation means.

As described above, the present invention engages the transmission gear with the internal gear portion by deviating the high-speed traveling operating arm from the intermediate position by operating the fast forwarding and rewinding operation means, while the high-speed traveling engaging the transmission wheel with either the idler or the supply reel stand to set the fast forward or rewind mode;
By operating the regeneration operation means, the constant-speed running operating arm is deflected, thereby engaging the constant-speed running transmission wheel with the external gear portion and the take-up reel stand, thereby setting the constant-speed running mode. Therefore, the transmission gear is not engaged with the internal gear part during the playback mode and the recording mode, so the gear noise during the playback mode and the recording mode is extremely quiet. The lifespan of the car's internal gears is also long.

In addition, when changing the mode from fast forward mode or rewind mode to another mode, the transmission gear goes through an intermediate position where it does not engage with the internal gear part of the drive wheel, so the operating force of the operating arm is light and smooth switching operation is achieved. be able to.

Furthermore, since there is no means for transmitting power to the reel stand between the flywheel and the main chassis, this is an excellent idea that allows the device to be thinner and ensures reliable power transmission. be.

[Brief explanation of the drawing]

1 to 4 are state explanatory diagrams showing each mode of stop, playback, fast forward, and rewind of the reel stand drive device according to the present invention, and FIG. 5 is a sectional view taken along the line X-X' of FIG. 1. be. 2: Supply reel stand, 4: Take-up reel stand, 16:
Drive vehicle, 17: Operating arm, 19: Transmission gear,
23: Slip gear.

Claims (1)

[Scope of Claim for Utility Model Registration] A supply reel stand, a take-up reel stand, an internal gear part located approximately midway between these two reel stands on the radially outer periphery, and an external gear part in the radially central part. an idler that is always engaged with the take-up reel base; a transmission gear that can engage with the internal gear; and a high speed transmission gear that transmits the rotation of the transmission gear to the idler or the supply reel base. A traveling transmission wheel is coaxially supported, and in a stop mode and a regeneration mode, the transmission gear is held in an intermediate position where the transmission gear is not engaged with the internal gear portion and the high-speed traveling transmission wheel is not engaged with the idler and the supply reel stand, respectively. and an operating arm for constant speed travel that pivotally supports a transmission wheel for constant speed travel that can be engaged with the external gear portion and the take-up reel stand, The actuating arm is linked to the fast forward and rewind operating means, and the constant speed running actuating arm is linked to the regeneration operating means, and the actuating arm for high speed running is deviated from the intermediate position by operating the fast forwarding and rewinding operating means. The transmission gear is brought into engagement with the internal gear part by engaging the transmission gear with the internal gear part, while the transmission wheel for high-speed running is engaged with either the idler or the supply reel stand to set the fast forward or rewind mode, and the regeneration operation means The invention is characterized in that by deflecting the operating arm for constant speed travel by the operation of , the transmission wheel for constant speed travel is brought into mesh with the externally toothed gear section and the take-up reel stand, thereby setting the constant speed travel mode. A reel stand drive device for a tape recorder.