JPS6132258A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To easily constitute a brake mechanism by pressing part of a tension regulator arm against a band in the beginning of loading and holding a payoff reel turntable inhibited from rotating, and separating it from the band and allowing the payoff reel turntable to rotate freely. CONSTITUTION:A cam 8 provided to a ring 7 rotates the arm 11 through a cam lever 24 and a transmission lever 19, the band 17 is pressed against the payoff reel turntable 1 by a member 15 fitted to the arm 11 to apply a brake, and the member 15 is separated from the band 17 to release the brake. Consequently, the brake mechanism is constituted with a small number of components by such simple constitution that the member 15 is fitted to the arm 11, and a magnetic tape T unwound from a take-up reel TA is taken up around the tape-up reel TA.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention records and reproduces data using a helical scan method using RAD by running a magnetic tape wrapped around the outer periphery of a rotating head cylinder and using a RAD to rotate the magnetic tape. The present invention relates to a recording/reproducing device.

[Background technology and its problems]

A helical scan type recording/playback device has a loading method in which a magnetic tape is pulled out from an attached cassette for recording or playback, and is wound around a rotating head cylinder in a predetermined manner, for example, around half a turn, and a cassette reloading method. A loading mechanism is provided for winding the magnetic tape into the cassette (discharging).

When pulling out the magnetic tape from the cassette and winding more magnetic tape into the cassette as described above, one reel stand is fixed, the magnetic tape is pulled out from the reel fitted to the other reel stand, and the magnetic tape is supplied. It is preferable to wind it onto a reel. This means that if a loaded magnetic tape is unloaded and then loaded again,
This is because the magnetic tape is loaded in the same state and the position of the magnetic tape is constant, so operations such as cueing are not required.

Conventional recording and reproducing devices are equipped with a brake mechanism or soft brake mechanism to apply braking to one reel stand when loading or unloading a magnetic tape, so a brake mechanism, etc. must be separately provided. ,
There are problems such as an increase in the number of parts and a complicated configuration.

Further, in the case of a soft brake mechanism, since the brake torque is small, there is a problem that the magnetic tape is pulled out from one reel, for example, a supply reel, and wound onto a take-up reel.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned problem K, and provides a recording/reproducing apparatus in which a brake mechanism can be easily constructed by utilizing a tape tension regulator mechanism.

[Summary of the invention]

In order to achieve the above-mentioned intended purpose, the present invention utilizes the shape of a cam provided on the loading ring when rotating the loading ring to p-load the magnetic tape, so that the tension regulator arm can be adjusted at the initial stage of loading. The supply reel stand is crimped onto the band to prevent rotation of the supply reel stand, and the supply reel stand is allowed to rotate freely, and the brake mechanism can be easily configured using a tape tension regulator mechanism. It is something.

〔Example〕

FIG. 1 is a plan view schematically showing the main parts of an embodiment of the present invention, FIG. 2 is a front view showing a tension regulator arm drive mechanism, and FIG. 3 is an enlarged plan view showing the tension regulator arm drive mechanism. 1 is a supply reel stand, 2 is a take-up reel stand, 3 is a rotating head cylinder, 4A, 4B, and 4C are fixed tape guides, 5A, 5B, and 5C
6 is a magnetic head, 6 is a capstan, and T is a rotatably supported loading ring (hereinafter simply referred to as ring).

), a cam 8 is provided on the inner periphery of the lower surface, and tape guides 9A, 9B, 9C, 9D, and 9B are provided on the upper surface.

and pinch roller 10 are attached. In addition, as shown in FIG. 4, the cam 8 is composed of a circular arc portion gas slope portion 8b, a circular arc portion 8c, a slope portion 8d, and a circular arc portion 8e.
The radius of each arc portion Baa 8c+ 8e increases in the order of arc portions Bee 8a+ 8c.

Reference numeral 11 denotes a tension regulator arm (hereinafter simply referred to as 7-arm) which rotates around a shaft 16, with a tape guide 12 at its tip and a locking portion 13 between the shaft 1B and the tip. Engaging portion 14. and member 15 are provided.

A band 11 is attached at one end to the locking part 13 and at the other end to a fixed locking part 18, and is arranged so as to face the member 15 and wrap around the outer circumference of the supply reel stand 1.

The transmission lever rotates around a shaft 23, and the pressure on one end is provided with a protruding transmission pin 20 that loosely fits into the retaining part 14, and the other end is provided with an engaging part 21. A spring 22 is stretched between the spring 11 and the spring 22.

24 is a cam lever that rotates around a shaft 27; one end has a protruding cam pin 25 that loosely fits into the retaining portion 21, and the other end has a cam roller 2 that comes into contact with a cam 8 provided with a ring IK.
6 is a provision.

The spring 22 tensioned as described above biases the 7-m 11 and the transmission lever 1g counterclockwise, and the retaining portion 21 presses the cam pin 25 to bias the cam lever 24 clockwise. , the cam roller 26 is connected to the arc portion 8a of the cam 8.
are pressed against each other, resulting in the state shown in Figure 1. Note that C is a cassette, s and 7 are supply reels, TA is a take-up reel, and T is a magnetic tape.

Next, the operation of loading the magnetic tape T will be explained.

First, as shown in FIGS. 1 and 2, when the cassette C is installed in the recording/reproducing apparatus, the tape guides 9A, 9B attached to the ring 1, the pinch rollers 10, and 7 are inserted into the cassette C.
- The tape guide 12 attached to the frame 11 enters.

Then, when the ring 1 is rotated counterclockwise by a ring rotation mechanism (not shown), the magnetic tape T is pulled out from the cassette C and q-guing is performed to wind it around the rotary head sill 3. At this time, the cam roller 26 of the cam lever 24 is in pressure contact with the circular arc portion 8a of the cam 8 due to the biasing force of the spring 22. Therefore, when the ring 1 rotates counterclockwise as described above, the cam roller 26 presses from the circular arc portion 8a to the inclined portion 8b1 and the circular arc portion 8C, and when the cam lever 24 rotates clockwise, the transmission lever 19 rotates counterclockwise, and arm 11 rotates clockwise. At this time, the band 11 rotates clockwise and no longer faces the ring 7 L', and the member 15 is stretched over the band 5 so as to press the band 11 against the circumferential recess of the supply reel stand 1 and prevent rotation. Then, each part will be in the state shown in FIG. While the cam roller 26 is in pressure contact with the circular arc portion 8c, the supply reel stand IK and the brake are turned off and locked, so the magnetic tape T is pulled out from the take-up reel T by the tape guide 9A. Even if the ring 1 rotates, the tape guides 9C, 9D, and 9E do not collide with the arm 11. In addition, the magnetic tape pulled out to the winding loop T.
If not, the biasing force of the spring 22 is applied to the magnetic tape T.
K is set to a value that does not cause damage (e.g. elongation), so the magnetic tape ■ is pulled out from the supply reel Su. 1 ring 1 further rotates and the cam ruler 26 is tilted away from the arc portion 8C of the cam 8. When the cam lever 24 rotates counterclockwise due to pressure contact with the portion 8d and the arcuate portion 8e, the transmission lever 19 slowly rotates clockwise and the arm 11 slowly rotates counterclockwise.

At this time, the 7-mm 11 rotates counterclockwise to cause the tape guide 12 to bring the magnetic tape T into contact with the magnetic head 5A,
The member 15 is separated from the band 11 to unlock the supply reel stand 1, and each part is in the state shown in FIG. 6. Therefore, in this state, the recording/reproducing mechanism (not shown) records data on the magnetic tape T.
Take up reel T.

If you record or play back by winding the
Spring 22. The tape tension can be kept constant by the action of the band 11.

Furthermore, in the case of unloading the magnetic tape onto the TV take-up reel T, when the ring 7 is rotated clockwise while rotating the take-up reel stand 2 clockwise, each part operates in the opposite direction to that described above. Take up the magnetic tape T on the reel TAK.
It is wound up and becomes the state shown in Fig. 1.

As mentioned above, the cam lever 24 is operated by the cam 8 provided on the ring T.
．． Rotate the arm 1 via the transmission lever 19, apply the brake by pressing the band 11 against the supply reel stand 1 with the member 15 attached to the arm 11, and release the brake by separating the member 15 from the band 17. Therefore, the brake mechanism can be configured with a simple structure in which the member 15 is attached to the arm 11 and a small number of parts, and the magnetic tape T pulled out from the take-up reel T can be wound onto the take-up reel . Further, the strength of the brake can be adjusted depending on the mounting position of the member 15.

In the embodiment, a separately constructed member 15 is attached to the arm 11, but the member 15 may be integrally constructed with the arm 11. Further, although the transmission lever 19 is interposed between the arm 11 and the cam lever 24, the spring 22 is
The transmission lever 19 can be omitted if the transmission lever 19 is stretched between the cam lever 1 and the cam lever 24 in consideration of the urging direction and the like.

〔Effect of the invention〕

As explained above, the recording/reproducing apparatus of the present invention loads a magnetic tape by rotating the loading ring.
At the beginning of loading, a part of the tension regulator 71 is crimped to the band to prevent rotation of the supply reel base, and this state can be maintained freely, so the tape tension regulator mechanism is used. This has the advantage that the brake mechanism can be easily configured.

[Brief explanation of drawings]

FIG. 1 is a plan view schematically showing the main parts of an embodiment of the present invention, FIG. 2 is a front view showing the tension regulator 7-in assembly mechanism, and FIG. 3 is an enlarged plan view showing the tension regulator arm drive mechanism. 4 are enlarged plan views showing the loading ring, and FIGS. 5 and 6 are operation explanatory views. In the figure, 1 is a supply reel stand, 2 is a take-up reel stand, 3 is a rotary head cylinder, 6 is a capstan, 7 is a loading ring, 8 is a cam, 9A to 9E are tape guides, 10 is a pinch roller, and 11 is a tension regulator arm,
15 C member, 17 C band, 1B is a locking part, 19
is a transmission lever, 22 is a spring, 24 is a cam lever,
26 is a cam roller, C is a cassette, and ■ is a magnetic tape. Figure 5 9E Figure 6

Claims (1)

[Claims] a loading ring provided with a supply reel stand, a take-up reel stand, a plurality of tape guides, a pinch roller, and a cam and rotatably disposed outside the rotating head cylinder;
a tension regulator arm that has a pivot point outside the loading ring and rotates in relation to the shape of the cam; and a tension regulator arm that is arranged to face an outer circumferential surface of the supply reel stand and a part of the tension regulator arm. and one end is fixed to the tension regulator arm;
consisting of a band whose other end is fixed to a locking part, and means for biasing the tension regulator arm in a predetermined direction;
When loading the magnetic tape by rotating the loading ring, due to the shape of the cam, a portion of the tension regulator arm presses against the band at the initial stage of loading to prevent rotation of the supply reel stand. A recording/reproducing apparatus characterized in that, while maintaining the above-mentioned state, the tension regulator arm is separated from the band at the end of loading to allow the supply reel stand to freely rotate.