JPS6260156A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve the reliability of a magnetic recording/reproducing device by providing a pulley part which transmits the revolutions to a tape take-up means from a capstan drive motor via a belt and a transmission means which transmits the motive power with branching to a cassette loading means via the pulley part. CONSTITUTION:A magnetic tape 1 is drawn out of a cassette 17 attached on a substrate 10 and has a contact with a cylinder 19 for record or reproduction. Then the tape 1 is held between a capstan 2a attached to the axial core of a capstan drive motor 2 and revolved in a body with the shaft of the motor 2 and a pinch roller 3 and driven by the motor 2 toward and arrow head A at a fixed speed. While the revolutions of the motor 2 are transmitted to a pulley part 5a via a belt 4 hooked over a pulley 2b set coaxially with the motor 2. Then the motor revolutions are transmitted to a motive power gear 22 of a slide clutch mechanism 21 via a gear 20 engaging a gear part 5b formed in a body with the part 5a.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a magnetic recording and reproducing device, and particularly to a VTR and the like equipped with a mechanism suitable for winding a tape and loading a cassette using a capstan drive motor. The present invention relates to a magnetic recording/reproducing device.

[Background of the invention]

It is already known that the power of the capstan drive motor is used not only for tape winding but also as a drive source for a device that automatically loads and exhausts a cassette, a so-called cassette loading device. Shown in Figures 5 and 6.

5 is a schematic plan view of a conventional VTR mechanism, and FIG. 6 is a right side view of a power transmission section to a conventional cassette loading device. In FIG. It is held between a capstan 2a and a pinch roller 3, which rotate integrally with the motor 2, and is transferred at a constant speed by the constant rotation of the capstan drive motor 2. −
In addition, a pulley 2 provided on the capstan drive motor 2
Rotation 9 is applied to the pulley portion 5a via the belt 4 hung on b.
is rotated to wind up the transferred magnetic tape 1. The power is transmitted to the cassette mounting device f18 (see FIG. 6) through an arm 11 rotatably provided on the board 10, an idler section 12a and a pulley section 12b that are rotatable about an axis at one end of the arm 11. This is performed by a rotating body 12 (see FIG. 6).

In FIG. 6, a belt 13 is hung around the pulley portion 12b so that the rotation of the rotating body 12 is transmitted to a pulley portion 14b integrally provided with the worm gear 14.

The rotation of the worm gear 14 is controlled by the gear 15. It is already well known that the signal is transmitted to the arm 16 to reciprocate the cassette 17 between a first position where it can be attached and removed and a second position where it can be recorded and played back, and a detailed explanation will be omitted. do.

Here, by pressing the idler part 12a of the rotary body 12 onto the rubber part 2c provided on the outer periphery of the rotating part of the capstan drive motor 2 and separating it, the capstan drive motor 2
Power transmission from the cassette mounting device 18 to the cassette mounting device 18 is selectively connected and cut off.

In addition, capstan drive motor 2 and cassette mounting g1
It is also conceivable that the power transmission connection/disconnection section 18 may be made by meshing gears instead of the pressure welding method using an idler.

However, in either case, it is necessary to provide a rubber part 2c or a gear part on the outer periphery of the capstan drive motor 2, which necessitates a special shape, especially for parts such as motors that are becoming increasingly standardized. has the disadvantage of high cost.

In addition, a capstan drive motor 2 and a cassette mounting device f
The power transmission connection/disconnection part of f18 must necessarily be placed near the outer periphery of the capstan drive motor 2, which imposes significant restrictions on placement, and this cassette mounting system ff! The block for transmitting power to the tape winding system 18 and the block for transmitting power to the tape winding system must be made separate, which also has the drawback of increasing the number of assembly steps.

Furthermore, generally due to space constraints, the outer diameter of the rotating body 12 is quite small compared to the outer diameter of the capstan drive motor 2, so the rotation speed of the five-rotating body 12 is quite high, resulting in rotational noise. It also has the disadvantage of being large and shortening the life of the bearing.

Incidentally, as related to the device for loading and unloading the cassette 17 using the power of the capstan drive motor 2,
For example, there is a device shown in Japanese Unexamined Patent Publication No. 59-113556, in which the power for driving the tape and for loading and unloading the cassette is obtained from a motor. The transmission system acts as a load, and there is concern that it will usually affect performance (e.g., wow and flutter) during tape running, and may also cause an increase in power consumption.

[Purpose of the invention]

The present invention has been made in view of the above, and its purpose is to provide a magnetic tape that can wind up a tape and load a cassette using a capstan drive motor, and that can improve productivity and reliability. The purpose of the present invention is to provide a recording/playback device.

[Summary of the invention]

A feature of the present invention is that the magnetic tape is wound onto a reel via a reel stand by a capstan drive motor that rotates a capstan forward and backward to transport the magnetic tape at a constant speed. A pulley unit that transmits rotation to the taking means, and a reciprocating motion between a first position where a cassette containing a magnetic tape and reel can be attached and detached after passing through this pulley unit, and a second position where recording or reproduction is possible. The present invention has a configuration including a transmission means for branching and transmitting power to the cassette mounting means.

[Embodiments of the invention]

The present invention will be explained in detail below using the embodiments shown in FIGS. 1 to 4.

FIG. 1 is a schematic diagram of the overall configuration showing one embodiment of the recording and reproducing state of the magnetic recording and reproducing apparatus of the present invention. In Figure 1,
1 is a magnetic tape, 2 is a capstan drive motor, 2a is a capstan, 2b is a pulley, 3 is a pinch roller, 4 is a belt, 5a is a pulley part, 5b is a gear part, 9 is a reel stand, 10 is a board, 17 is a cassette. The magnetic tape 1 is pulled out from the cassette 17 mounted on the board 10,
It is attached to the cylinder 19 for recording or reproduction.

The magnetic tape 1 is provided at the axis of a capstan drive motor 2, is held between a capstan 2a that rotates integrally with the capstan 2a, and a pinch roller 3, and is rotated in the direction of the arrow shown in the figure by constant rotation of the capstan drive motor 2. Transferred at a constant speed.

In addition, a pulley portion 5a is connected to the capstan drive motor 2 via a belt 4 that is hung around a pulley 2b that is coaxially provided with the capstan drive motor 2.
The rotation is transmitted to the driving side gear 22 of the clutch mechanism 21 through the gear 20 meshing with the gear portion 5b (see FIG. 2) formed integrally with the boob portion 5a'.

FIG. 2 is a side sectional view showing an embodiment of the main part of power transmission to the tape winding device and the cassette mounting device of the magnetic recording/reproducing apparatus of the present invention. Driving side gear 22 and driven side member 2
A friction member 24 is sandwiched between the driven member 23 and the driven member 23, and the rotation of the driven member 23 is transmitted by the frictional force generated by the pressure contact of the spring 25. Then, the rotation is transmitted to the reel stand 9 through the gear 269 provided on the upper part of the driven side member 23 and the oscillating gear 27, and the magnetic tape 1 transferred at a constant speed via the reel stand 9 is reeled into the cassette 17. 28(
(see Figure 1). This part is the tape winding device.

On the other hand, a switching gear (transmission member) 29 that can move up and down in the axial direction is arranged so as to be able to mesh with the gear portion 5b.
The spring 30 is biased in the direction of meshing with the gear portion 5b and the gear 31.

If engaged, gear 31. The worm gear 14 is connected to the worm gear 14 through a gear portion 14a formed integrally with the worm gear 14.
Rotation is transmitted to. Then, the signal is transmitted from the worm gear 14 to the worm wheel 32, drive gear 33, and drive arm 34 in FIG. The recordable or reproducible second digit i! shown in FIG. 41 and can be reciprocated. Note that this part is the cassette mounting device 18.

Here, when the capstan 2a rotates in the so-called normal rotation direction shown by arrow B in FIG.
The drive gear 33 rotates in the direction of arrow C in FIG. 3 and operates in the cassette loading direction, and when the capstan 2a rotates in the opposite direction to arrow B, so-called reverse direction, it operates in the cassette unloading direction. It is configured as follows.

The mode (recording,
(playback, FF, REW, etc.), the switching gear 29 is pushed up against the biasing force of the spring 30 by a switching element (not shown), and the engagement with the gear portion 5b is released, and the power to the cassette mounting device 18 is released. Transmission is cut off.

Further, although detailed explanation is omitted, the switching gear 29 is connected to the gear portion 5.
When engaged with b, the oscillating gear 27 is configured to prevent contact with the reel stands 9, 35,
Therefore, the reel stands 9, 35 do not rotate.

As described above, the capstan drive motor 2 originally includes a pulley 2b for transmitting power to the tape winding means.
The capstan drive motor 2 does not require a special shape, and an inexpensive standard motor can be used as the capstan drive motor 2.

Further, parts related to power transmission to the tape winding device and the cassette mounting device 18 can be combined into one block, and productivity can be improved.

Furthermore, in the power transmission path to the cassette mounting [t18], the rotation of the capstan drive motor 2 is used in a direction that decelerates, which reduces rotational noise, extends the life of the bearing, and improves reliability. can do.

〔Effect of the invention〕

As explained above, according to the present invention, tape winding and cassette mounting can be performed using an inexpensive standard capstan drive motor, and productivity and reliability can be improved. There is. .

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the overall configuration showing one embodiment of the recording and reproducing state of the magnetic recording and reproducing device of the present invention, and FIG. 2 is a power transmission to the tape winding device and cassette loading device of the magnetic recording and reproducing device of the present invention. 3 and 4 are right side views of the cassette loading device in the first and second positions, respectively, and FIG. 5 is a schematic diagram of a conventional VTR mechanism. The plan view and FIG. 6 are right side views of a power transmission section to a conventional cassette mounting device. DESCRIPTION OF SYMBOLS 1...Magnetic tape, 2...Capstan drive motor, 2a...Capstan, 2b...Pulley, 4...
・Belt, 5a...Pulley part, 5b...Gear part, 9
, 35... Reel stand, 17... Cassette, 18...
- Cassette mounting device, 20... Gear, 21... Clutch mechanism, 22... Driving side gear, 23... Driven side member, 25... Spring, 26... Gear, 27...
- Swing gear, 28... Reel, 29... Switching gear (transmission member), 30... Spring. 31... Gear, 32... Worm wheel, 33.
... Drive gear, 34... Drive arm. I+

Claims (1)

[Scope of Claims] 1. A pair of reel stands that engage and rotate a pair of reels wound with magnetic tape, and a capstan drive motor that drives a capstan for forward and reverse rotation to transport the magnetic tape at a constant speed; a tape winding means for winding the magnetic tape transferred at a constant speed onto the reel via the reel stand; a first position where a cassette containing the magnetic tape and reel can be attached and detached; and a cassette mounting means for reciprocating between positions 2 and 3, and a power source for both the tape winding means and the cassette mounting means is the capstan drive motor. A magnetic recording and reproducing device comprising: a pulley section that transmits rotation to the tape winding means via the pulley section; and a transmission means that branches and transmits power to the cassette mounting means after passing through the pulley section. Device. 2. The magnetic recording device according to claim 1, wherein the transmission means is configured to perform a switching operation for connecting and disconnecting power transmission by a transmission member that engages with the tape winding means. playback device.