JPH05342713A - Recording or reproducing apparatus - Google Patents

Abstract

PURPOSE:To perform a tracking operation in a wide band and to make an apparatus small-sized by a method wherein the movement amount of a belt- shaped or string-shaped driving-force transmission device and the movement amount of a tapelike recording medium are set to be in a linear relationship. CONSTITUTION:In a steel belt 100, a hole part 101 and a slit 102 which are used to fix it to a pulley 110 are formed in its central part. The steel belt is wound, by about 360 deg., on the pulley 110 which has been fixed and bonded to a shaft 116 for a motor 115 by means of a screw 111. A tension is exerted on both end parts 103, 104 by means of the energizing force of springs 67, 87. At this time, rollers 68, 63, 70 are arranged in positions which are decided by turning posts 17, 18, 19 by a prescribed angle by making use of a shaft 62 for a rotary arm 61 as the rotation center. In the same manner, rollers 90, 83, 88 are arranged in positions which are decided by turning posts 17 to 19 by a prescribed angle by making use of a shaft 82 as the rotation center. Thereby, the movement amount of the steel belt 100 and the movement amount of a tape 50 which has been wound on a drum 10 are set to be in a linearly corresponding relationship, and a tracking operation is a wide band can be performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recording a signal on a tape-shaped recording medium by a rotary head drum or reproducing a signal recorded on the recording medium.

[0002]

2. Description of the Related Art As a recording or reproducing apparatus of this type,
Conventionally, VTR, DAT, and the like that use a magnetic tape have been known. In such an apparatus, it is necessary to correctly trace the head attached to the rotary head drum (hereinafter referred to as drum) on the recording track of the magnetic tape. Then, in order to achieve this, a. A method of controlling the rotation speed of the capstan based on a tracking error signal generated from the reproduction signal, b. On the basis of a tracking error signal generated from a reproduction signal, a method is used in which the head itself is moved by an actuator using a bimorph element, a voice coil, etc., and its position is controlled.

As a third method, a method of driving a tape wound around a drum in a traveling direction using a movable post based on a tracking error signal generated from a reproduction signal is prior to the applicant of the present application. Patent applications have been filed (Japanese Patent Application No. 63-1188553, Japanese Patent Application No. 63-127002, etc.). The third method can realize higher responsiveness, smaller device size, and lower cost than the previous two methods, and is particularly suitable for a narrow track digital VTR.

[0004]

However, according to the above-mentioned third method, when the posts located on the inlet side and the outlet side of the drum are simultaneously operated in the tape running direction, the displacement and the amount of tape movement are It is difficult to make the relationship of to be completely linear. Therefore, it can be driven only within a range of a relatively small moving amount that can be regarded as linear, and there is a limitation in using it for applications requiring a large amplitude of several tracks to several tens of tracks such as high speed reproduction and slow motion reproduction.

As a method of driving with such a large amplitude, a rotary arm provided with a movable pin is attached to a voice coil motor, the torque of the motor is balanced with the tape tension, and the head is used as a movable head for error. Has been reported (Technical Report of the Television Society of Japan, Vol. 14 No. 47 pp1-6 Se).
p. 1990). In this method, in order to balance the torque and tension of the motor, it is necessary to keep the current flowing. Moreover, since the movable head is used, power consumption is significantly increased. Further, since two voice coil motors and a movable head are used, there arises a problem that the device becomes large in size and high in cost.

In view of the above problems, it is an object of the present invention to provide a recording or reproducing apparatus which enables tracking in a wide band and reduces the load of a control drive system to achieve miniaturization of the apparatus. ..

[0007]

SUMMARY OF THE INVENTION In order to solve the conventional problems and achieve the above object, the present invention provides a recording medium running system in which a tape-shaped recording medium is wound around a rotary drum having a head. A recording or device for forming a signal and recording or reproducing the recorded signal on the wound tape-shaped recording medium, wherein the recording medium running system has an inlet side and an outlet side with respect to the rotary drum. A first post and a second post that are located in the tape-shaped recording medium and are moved in contact with the tape-shaped recording medium to regulate the traveling position of the recording medium; and a first post that movably supports the first and second posts. First and second supporting means, driving means for generating a driving force for driving the first and second supporting means, and the driving force by the driving means is transmitted to the first and second supporting means. Obi belt Or it is constituted by a transmission means filamentous. The transmission means is movable in the longitudinal direction of the transmission means, and the movement amount of the transmission means and the movement amount of the tape-shaped recording medium wound around the rotary drum are proportional to each other. ing.

[0008]

Embodiments of the present invention will be described in detail below with reference to the drawings.

<First Embodiment> FIGS. 1 and 2 are plan views showing a first embodiment of the present invention. FIG. 1 shows a tape running mechanism portion, and FIG. The enlarged view is shown.

1 and 2, 10 is a drum, and 12
Is a tape cassette, 14 to 27 are guide posts, 28 is a capstan, 30 is a pinch roller, 32 is an erasing head, 34 to 35 are fixed heads, 40 is a supply reel, 42 is a take-up reel, and 50 is a magnetic tape. Is.

A magnetic tape (hereinafter referred to as tape) 50 is wound around the drum 10 in a helical shape,
Thus, recording or reproduction of a signal is performed when traveling from the supply reel 40 to the take-up reel 42. In the present embodiment, the posts 18 and 23 are used when recording or reproducing.
By moving the tapes 50 as shown by arrows Y ₁ and Y ₂ in FIG. 2, respectively, to move the tape 50 wound around the drum 10 in the running direction, and the position of the head (not shown) attached to the drum 10. To control the tracking operation. When recording or reproducing, the capstan 28 or the reels 40 and 42 are driven,
Time-lapse recording is performed by causing the running speed of the tape 50 to run at a high or low feed speed different from the standard speed, and intermittently matching the tape running speed of the portion wound on the drum 10 to the standard speed. It is possible to perform intermittent recording or special playback.

As shown in FIG. 2, the rotating arm 61,
Reference numeral 81 is formed in a substantially L shape, posts 18 and 23 are respectively planted at one end of each, and the other ends are rotatably supported by shafts 62 and 82, respectively. .. Therefore, the posts 18 and 23 can move in the directions of the arrows Y ₁ and Y ₂ with the shafts 62 and 82 as the centers of rotation. Further, the intermediate portion of the rotating arm 61 and the rotating arm 8
Spring extension portions 66 and 86 are respectively provided on the extension portions 81a extending from the rotating end of the spring 1, and springs 67 and 87 are extended between the spring engagement portions 65 and 85 provided on the chassis 1, respectively. ing. Then, the rotating arms 61 and 81 are
The rollers 6 are urged by springs 67 and 87, respectively, and the urging force causes the rollers 6 disposed on the rotating arms 61 and 81 to be rotated.
It is positioned by being pressed by the steel belt 100 wound around 3,83.

As shown in the developed view of FIG. 3, the steel belt 100 is formed with a hole portion 101 and a slit 102 for fixing it to a pulley 110 (FIG. 2) at the center thereof.
It is wound around a pulley 110 fixed to a rotating shaft 116 of a motor 115 (FIG. 2) by about 360 degrees and fixed by a screw 111. Further, as shown in FIG. 2, the both end portions 103 and 104 are fixed to locking portions 203 and 207 protruding from the chassis 1 by screws 201, 202, 205 and 206, respectively, and further the rollers 68 and 63 are provided. , 70, 90,
83, 88 and the springs 67, 87 as described above.
Tension is applied by the urging force of. here,
The rollers 68, 63, 70 are arranged at positions where the posts 17, 18, 19 are rotated by a predetermined angle with the shaft 62 of the rotating arm 61 as the center of rotation. Similarly, the rollers 90, 8
3, 88 also have posts 22, 23, with the shaft 82 as the center of rotation.
24 is arranged at a position rotated by a predetermined angle. With such a configuration, the moving amount of the steel belt 100 and the moving amount of the tape 50 wound around the drum 10 have a relationship of 1: 1, and by rotating the pulley 110 in the direction of the arrow X, The tape 50 wound around the drum 10 can be moved in proportion to the rotation angle.

In this embodiment, the amount of movement is feedback-controlled by detecting the slit 106 (FIG. 3) formed in the steel belt 100 by the photo interrupter 500. As a result, the motor 115 and the rotating arm 6
It is possible to dampen the resonance generated by the inertia of 1,81 and the springs 67,87. This amount of movement is the pulley 1
It is limited by the stoppers 112 and 113 so that the rotation angle of 10 is within a range of about 180 degrees.

Further, in this embodiment, the slit 107a (FIG. 3) for detecting the center position of the moving range is detected by the photo interrupter 500 to improve the accuracy of the middle point position. It can also be returned to the midpoint position by balancing.

In the post arrangement of this embodiment, when the posts 15, 17, 19 and the like are moved from the front surface portion of the cassette 12 by a loading mechanism (not shown) to form the tape running path shown in FIG. 18, 19 and posts 22, 23 can interfere with each other. Therefore, it is necessary to retract the posts 18 and 23 while moving the posts 19 and 22. This evacuation operation is performed as follows. In FIG. 2, the motor 115 is rotated counterclockwise to wind the steel belt 100 around the pulley 110 until the slit 107b on the steel belt 100 is detected. At this time, the steel belt 100 wound around the rotary arm 8 via the roller 83.
The post 23 is retracted by rotating 1 clockwise. On the other hand, the arm 1 is loaded by a loading mechanism (not shown).
By rotating one end portion 132a of 32 in the clockwise direction, the steel belt 100 is pressed by the roller 130, and by rotating the rotating arm 61 in the counterclockwise direction via the roller 63, the post 18 is retracted. Can be made

In this embodiment, by detecting the slit 107b, the detection signal is used as the evacuation operation completion signal to increase the certainty of the operation. However, if the motor 115 is allowed to rotate freely, the roller 130 is moved. Post 1 just by pushing
Both 8 and 23 can be saved.

Next, the special reproduction operation using this apparatus will be described.

The steel belt 1 is driven by driving the motor 115.
00 causes the position time function to perform a reciprocating motion indicated by a triangular wave. However, in reality, the response frequency is limited, and if sufficient attenuation is performed as described above, the
The operation has a waveform with rounded vertices as shown in (a). When the velocity waveform is obtained by differentiating this, FIG.
A trapezoidal wave with a swing width V _S is obtained as shown in.

On the other hand, if tape 50 is being fed by capstan 28 or reel 42 at speed V _T ,
Speed of the tape 50 of the portion wound around the drum 10, as shown in FIG. 4 _(c), will change the trapezoidal waveform repeating speed of _(V T + V _S) and _(V T -V _S) .. When the standard playback speed is V _O , V is V when n times faster playback (V _T = nV _O ).
_S = (n-1) a steel belt 1 so that _{V O}
By driving 00, V _T −V _S = V _O , and the tape speed can be set to the standard speed during the period T. During this time, one screen is played back and stored in memory,
By continuing to display the same screen from the memory until the next reproducible period T, noiseless search reproduction can be performed. Similarly, if V _S = (n + 1) V _O is also set for n-fold speed reproduction in the reverse direction, then V _T + V _S =
It becomes V _O.

Next, slow reproduction will be described.

If the response speed is several times the frame frequency, slow reproduction in the range of about -1/2 to +1 times is possible by the method described below. If the response speed is low, the speed range in which slow playback is possible is limited accordingly. In the case of slow reproduction, there is a period during which the same screen is continuously displayed, and therefore it is not necessary to reproduce the same screen while it is being repeatedly displayed. Therefore, the tape position may be moved to the next reproduction position by utilizing this interval. For example, in the case of 6/7 times reproduction, the displacement of the steel belt 100 is shown in FIG.
It drives as shown by the sawtooth wave as shown in FIG. At this time, as shown in FIG. 5B, the speed of the tape 50 wound around the drum 10 is the standard speed V _O except for the period T ′ corresponding to displaying the same screen once on seven screens.
Drive in. During the period T ', the average speed is 0,
It can be seen that smooth slow playback can be performed.

Next, the operation of the present apparatus in the time-lapse recording used for animation, CG (computer graphic) and time-lapse photography will be described.

Conventionally, a method has been adopted in which the capstan is repeatedly driven in forward and reverse directions. However, since the capstan has low responsiveness, a long run-up period is required, so that the same portion of the tape is repeatedly run. Has increased,
There was a risk of tape damage.

If the apparatus of this embodiment is used, the run-up period can be shortened and the repeated running is performed only by the drum section, so that the risk of tape damage is extremely small.
That is, with the capstan stationary, the steel belt 100 is driven in a triangular wave shape or a sawtooth wave shape such that the forward speed is V _O to record one screen, and then the capstan is used to tape one screen. You can send. The belt stroke can be recorded without feeding the tape with a capstan.

Although the steel belt is used in the above-described embodiments, a wire may be used, and a rubber belt or a timing belt may be used as long as the responsiveness and accuracy can be satisfied.

Further, the belt moving amount may be detected by attaching a rotary encoder to the motor, or other optical or magnetic sensor may be used.

Further, the rollers may be arranged in a similar shape to the posts, and by making the ratio the same on both sides of the drum, the amount of movement of the belt is proportional to the amount of movement of the tape, and , The amount of tape movement on the input side and the amount on the output side of the drum become equal.

Although the retracting mechanism is provided for the loading operation in the above-described embodiment, the retracting mechanism can be omitted by devising the post arrangement.

Further, in the above-described embodiment, the rotating arm is used, but the same effect can be achieved by using the linear guide mechanism.

<Second Embodiment> Next, a second embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 is a plan view showing a main part of the second embodiment, and FIG. 7 is an exploded perspective view showing a post moving mechanism. In the description of the present embodiment, the same elements as those of the first embodiment and those having the same functions will be denoted by the same reference numerals and the description thereof will be omitted.

The posts 18 and 23 are composed of the rotating arm 161,
181, each of which has been planted, and has Y ₃ , Y centered on the axis 55.
_It is movably supported in _four directions. Rotating arm 1
Reference numerals 61 and 181 denote end portions 56 a and 5 of the torsion spring 56.
6b, and the rollers 63 and 68 arranged on the rotating arms 161 and 181 are respectively biased by the biasing force.
It is positioned by being pressed against the steel belt 200 wound around. The rotating arms 161, 1
81 is inserted into the shaft 55 in order, and then the rotating arm 181
The washer 57b and the torsion spring 5 on the fitting portion 181a of the
6 is loosely fitted and the washer 57a is loosely fitted to the shaft 55, and then the E ring 55 'is locked to the shaft 55.

As shown in FIG. 7, the steel belt 200 has a hole 101 for fixing to the pulley 110 and a slit 106, and the shaft of the motor 115 fixed to the subchassis 300 with screws 117 and 118. 11
It is tightly wound around the pulley 110 fixed to 6 by 180 degrees and is fixed by a screw 111. Further, the steel belt 200 is fixed to the fixing plate 310 erected on the sub-chassis 300 by the screws 201, 202, 205, 206, and is wound around the rollers 68, 63, 130, 83, 88, as described above. Tension is applied by the biasing force of the spring 56. Further, both ends 311 and 312 of the fixed plate 310 are formed as curved surfaces so as to serve as guide portions of the steel belt.

The roller 68 is fitted into a shaft 69 provided upright on the subchassis 300, and is prevented from coming off by an E ring 69 'engaged with the shaft 69. Similarly, the shaft 6 installed on the rotary arm 161 and the arm 232, respectively.
Rollers 63 and 130 are fitted and inserted into 4, 131, and
These rollers 63 and 130 are E-rings 64 'and 131'.
The removal is prevented by. On the other hand, the rollers 83 and 88 arranged on the side of the motor 115 are also similar to the shafts 84 and 8.
9. E-rings 84 'and 89' prevent fitting and removal.

Here, the rollers 68, 63 and the guide 315.
Is disposed at a position where the posts 17, 18, and 19 are rotated by a predetermined angle with the rotation shaft 55 of the rotation arm 161 as the center of rotation. Similarly, the guide 316, the rollers 83, 88
Is also arranged at a position where the posts 22, 23, 24 are rotated by a predetermined angle with the shaft 55 as the center of rotation. With such a configuration, the movement amount of the steel belt 200 and the drum 10
The moving amount of the tape 50 wound around the drum has a relationship of 1: 1. By rotating the pulley 110 in the direction of the arrow X ₁ , the tape is wound around the drum 10 in proportion to the rotation angle. The tape 50 can be moved.

At this time, since the difference in the rotation angle between the arm 161 and the arm 181 is very small, the spring 56
Rotates with the two arms 161, 181 and its biasing force hardly changes. Therefore, arm 1
The tensions applied to the steel belt 200 by the 61 and 181 also hardly make a difference. Strictly speaking, however, a slight difference in tension occurs due to a change in the direction of the belts before and after the rollers 63 and 83, so that there is a balanced position.
By appropriately setting the spring constant of 6, it is possible to reduce the spring constant to a level that can be practically ignored.

Further, in this embodiment, the steel belt 2
The slit 106 is formed at 00, and the photo interrupter 500 detects the slit 106 to detect the position of the belt 200 and obtain a position signal to control the motor 115.

Further, by carrying out this embodiment,
It is easy to increase the higher-order mode, for example, the resonance frequency of the spring 56 and the two arms 161, 181 and the like, while the first-order resonance frequency of the steel belt 200 moving left and right is sufficiently small, so that a large control gain and a wide range. A control band can be realized.

Since the load on the motor is small, a small motor can be used, and the power consumption can be reduced.

Further, in the post arrangement of this embodiment,
To form the tape path shown in FIG.
When the posts 15, 17, 19 and the like are moved from the front surface of the device by a loading mechanism (not shown), the posts 18, 19 and the posts 22, 23 interfere with each other. Therefore, in this embodiment, while moving the posts 19 and 22,
The operation of retracting the posts 18 and 23 is performed. That is, by the unillustrated loading mechanism, the one end 232a of the arm 232 is pressed counterclockwise to move the roller 130 to the left, so that both posts 18 and 23 are retracted upward in FIG. At this time, if necessary, the motor 115 can be driven to ensure the retracting of the post 23. Further, the certainty can be increased by detecting the retracted amount by the detection signal of the photo interrupter 500, but in the present embodiment, the head of the screw 111 screwed to the pulley 110 is simply attached to the sub chassis 3.
The method of abutting against the stoppers 112 and 113 formed in 00 is adopted, and therefore, a slight driving current is applied to the motor 115.

The operation of this embodiment will be described first.
Since the operation is similar to that of the embodiment described above, the description thereof is omitted.

Although the torsion spring is used as the elastic member in this embodiment, a tension coil spring or a leaf spring may be used. Alternatively, the elasticity of the arm itself may be used. In that case, the two arms can be integrated.

Further, the post drive unit is used as the sub chassis 300.
Although it is arranged above and unitized, it may be formed directly on the chassis 1. Alternatively, positioning portions such as the posts 19 and 22 may be formed in a part of the sub chassis 300 during the loading operation.

<Third Embodiment> Next, a third embodiment will be described with reference to FIGS. FIG. 8 is a plan view showing an essential part of the third embodiment, and FIG. 9 is an exploded perspective view showing a post moving mechanism. In the description of the present embodiment, the same elements as those of the first or second embodiment or those having the same functions will be denoted by the same reference numerals and the description thereof will be omitted.

The posts 18 and 23 are composed of a rotating arm 261,
281, each of which is centered on the axis 55 and has Y ₅ ,
It is movably supported in the Y ₆ direction. The rotating arms 261 and 281 are the same as those in the second embodiment.
The coil spring 156 is inserted into the shaft 55 erected at 0, but at that time, a simple coil spring 156 is used instead of a torsion spring.

Two steel belts 200, 250 are wound around the rollers 63, 71, 83, 91 arranged on the rotating arms 261, 281 and one end 251 of the steel belt 250 is connected by a spring 255. Steel belt 200, 25 by pulling and applying tension
Equal tension is applied to both zeros. The other end 252 of the steel belt 250 has screws 253,
By 254, it is fixed to the fixing portion 430 provided upright on the sub chassis 400. Further, the rollers 63, 71 and the rollers 66, 68, 66 ', 68', and the rollers 83,
91 and the rollers 86, 88, 86 ', 88' are arranged so as to be symmetrical with respect to the movements of the rotating arms 261, 281.
The expansion / contraction amount of the spring 255 is set to be almost 0 with respect to the operation of 1.

The steel belt 100 is fixed to the pulley 110 attached to the shaft 116 of the motor 115 with a screw 110, and the rotation of the motor 115 causes the two rotating arms 261 and 281 to swing. here,
In the present embodiment, the rollers 68, 63, 66 are arranged at positions where the posts 17, 18, 19 are rotated by a predetermined amount around the shaft 55. Rollers 88,83,86
The same applies to the posts 22, 23 and 24. With the above arrangement, the steel belt 20
The amount of movement of 0 and the tape 50 wound around the drum 10
The moving amount of the motor 115 becomes 1: 1 and the motor 115
The tape 50 can be moved in proportion to the rotation angle of. At this time, the load applied to the motor 115 is the roller 6
The tension applied to the steel belt 200 due to the change in the direction of the belts before and after the rollers 3, 71 and the rollers 83, 91 is mainly generated due to the difference between the left and right of the pulley 110. This can be quite small, depending on the roller placement.

Further, a slit 106 is formed on the steel belt 200, and the slit 106 is detected by the photo interrupter 500, whereby the belt displacement is detected to obtain a displacement signal, and the motor 1 is based on this displacement signal.
15 by controlling the inertia of the motor 115 and the rotating arms 261, 281 and the steel belts 200, 2
Low frequency resonances due to changes in tension load of 50 can be damped well. Since the resonance of the second or higher order, for example, the resonance with the spring 255 can be set high, high control gain and high responsiveness can be expected. In addition, the motor 11
Since the load constantly applied to 5 is small, a small motor can be used and power consumption can be saved.

The operation of this embodiment is also the same as that of the first embodiment, so its explanation is omitted.

<Fourth Embodiment> Next, a fourth embodiment will be described with reference to FIG. FIG. 10 is a plan view showing the main part of the fourth embodiment. In the description of the present embodiment, the same elements as those of the first, second or third embodiment or those having the same operation are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment, one steel belt 600 is used to regulate the two arms 361 and 381. Therefore, the rollers 63, 83 and the like are all arranged on the same plane. The retracting operation at the time of loading is performed by rotating the pulley 130 as follows. By rotating the pulley 130 counterclockwise from the position shown, the upper side of the steel belt 600 in the drawing is moved to the left in FIG.
The lower side is moved to the right by the same amount. Therefore, in this embodiment, the retracting operation is performed without the expansion and contraction of the spring 255, and the spring constant of the spring 255 can be increased. If you choose the right material,
It is also possible to eliminate the spring 255 and fix the end portion 251 of the belt 600 to which the spring 255 is attached.

The other structure and operation are similar to those of the third embodiment.

Also in the second, third and fourth embodiments, the following can be said as in the first embodiment. That is, wires other than the steel belt may be used, and a rubber belt or a timing belt may be used as long as the responsiveness and accuracy can be satisfied.

The amount of movement of the belt may be detected by attaching a rotary encoder to the motor, or other optical or magnetic sensor may be used.

Further, the arrangement of the rollers does not necessarily have to correspond to the arrangement of the posts at 1: 1 and may be similar to the arrangement of the posts, and the ratio is the same on both sides of the drum. The amount of movement of the belt is proportional to the amount of movement of the tape, and the amount of movement of the tape on the input side and the amount of movement of the tape on the drum are equal.

[0056]

As is apparent from the above description, by adopting the configuration according to the present invention, the moving amount of the belt-like or thread-like driving force transmitting means and the moving amount of the tape-shaped recording medium are made to have a linear relationship, A low power consumption and compact post drive system can be configured without causing tension fluctuations, and high-speed search, slow playback, or time-lapse recording can be realized.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment.

FIG. 2 is a plan view showing a main part of the first embodiment.

FIG. 3 is a development view of a steel belt.

FIG. 4 is an explanatory diagram of an operation during high speed reproduction.

FIG. 5 is an explanatory diagram of an operation during slow playback.

FIG. 6 is a plan view showing a main part of the second embodiment.

FIG. 7 is an exploded perspective view showing a post moving mechanism according to a second embodiment.

FIG. 8 is a plan view showing an essential part of the third embodiment.

FIG. 9 is an exploded perspective view showing a post moving mechanism according to a third embodiment.

FIG. 10 is a plan view showing a main part of the fourth embodiment.

[Explanation of symbols]

 10 rotary head drum 12 cassette 17 guide post 18 guide post 19 guide post 22 guide post 23 guide post 24 guide post 50 magnetic tape 61 rotating arm 63 roller 68 roller 70 roller 81 rotating arm 83 roller 88 roller 90 roller 100 steel belt 106 Slit 115 Motor 150 Steel belt 161 Rotating arm 181 Rotating arm 200 Steel belt 255 Spring 261 Rotating arm 281 Rotating arm 361 Rotating arm 381 Rotating arm 500 Photo interrupter 600 Steel belt

Claims (6)

[Claims] 1. A tape-shaped recording medium is wound around a rotary drum having a head to form a recording-medium running system, and a signal is recorded on the wound tape-shaped recording medium, or a recorded signal is recorded. A recording or device for reproducing, which is located on the inlet side and the outlet side of the rotary drum in the recording medium traveling system, and is moved by contacting the tape-shaped recording medium and moving the recording medium. First and second posts that regulate the first and second posts that movably support the first and second posts.
And second supporting means, driving means for generating a driving force for driving the first and second supporting means, and the driving force by the driving means is transmitted to the first and second supporting means. A belt-shaped or thread-shaped transmission means, wherein the transmission means is movable in its longitudinal direction, and the movement amount of the transmission means and the movement amount of the tape-shaped recording medium wound around the rotary drum. A recording or reproducing device characterized in that and are configured to be in proportion to each other. 2. The recording or reproducing apparatus according to claim 1, further comprising detection means for detecting the amount of movement of the transmission means. 3. The recording or reproducing apparatus according to claim 2, wherein the transmission means is formed with a plurality of slits, and the amount of movement of the transmission means is detected by detecting the slits. 4. The first supporting means and the second supporting means are connected via an elastic member, and by the elastic force of the elastic member,
The recording or reproducing apparatus according to claim 1, wherein tension is applied to the transmitting means. 5. The recording or reproducing apparatus according to claim 1, further comprising a belt-shaped or thread-shaped biasing means for pressing the first supporting means and the second supporting means against the transmitting means. 6. The recording or reproducing apparatus according to claim 5, wherein one end of the biasing means is fixed via an elastic member.