KR20010010685A - Apparatus for tape tension controlling of tape recorder - Google Patents

Abstract

PURPOSE: A tape tension adjustment device of a magnetic recording/playback device is provided to prevent a magnetic tape from being damaged by canceling tension of the magnetic tape in a process of converting a playback mode into a stop mode and to drive a head drum easily when the playback mode is performed again. CONSTITUTION: A motor gear of a capstan motor rotates clockwise when a stop mode signal is output in a playback mode. A cam gear rotates at a specific angle and a function plate(4) moves reversely. A pinch roller is separated from the shaft of the capstan motor and a magnetic tape does not travel. An external force is removed from a supply brake(11) as the function plate moves to right. The supply brake limits rotation of a supply reel assembly(10) with clockwise rotation power. At the same time, a power relay(110) rotates counterclockwise to put a hanging pin of a tension lever(9) between first/second cams of the power relay. The power relay interlocks with the tension lever to cancel tension of the magnetic tape when the function plates reaches a stop mode. The hanging pin of the tension level is put on the second cam hole of the power relay to limit rotation of the tension lever. On the contrary, when the stop mode is changed to the playback mode, the function plate moves left. Finally, the hanging pin of the tension lever is positioned on the first cam of the power relay in the playback mode. Therefore, the tension of the magnetic tape is adjusted freely without influence of the hanging pin.

Description

Tape tension controlling device of magnetic record player {Apparatus for tape tension controlling of tape recorder}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a tape tension control apparatus for a magnetic recorder for selectively transmitting power to a traveling system and a loading system using only a capstan motor. More particularly, the present invention relates to a tape tension control apparatus. By releasing the tension, it prevents the magnetic tape from being damaged for a long time and facilitates the start of the head drum when the PB mode is performed again, and also prevents excessive tension on the magnetic tape when loading the magnetic tape. The present invention relates to a tape tension control device of a magnetic recording / playback device which makes the rotation of the head drum smoother.

In general, magnetic recording players such as video tape recorders have been developed in various forms by many advanced companies for a long time, and nowadays, they are almost spread in each household and feel like a living necessity for modern people.

Most of the magnetic recorders currently used for home use mainly ½-inch tape cassettes using the VHS (Video Home System) method.

Such a magnetic recording / playback apparatus includes a cassette holder in which a tape cassette is mounted, drive members for drawing the cassette holder into the main body of the apparatus and seating the main cassette on the main deck, and a magnetic tape stored in the tape cassette. And a tape loading / unloading device for loading or unloading to the rotating head drum side installed on the main deck, and a tape guide device for guiding the magnetic tape to run along a predetermined path.

When the tape cassette is lightly pushed into the cassette inlet of the magnetic recorder configured as described above, the tape cassette is accommodated in the cassette holder and the cassette holder is seated on the main deck, and then the tape loading / unloading device. The magnetic tape is led and loaded onto the head drum which is rotating at a high speed by the supply and winding-side pole base constituting the signal to record the signal on the magnetic tape or to reproduce the recorded signal.

Recently, a portable camera-integrated tape recorder has been widely known by applying the magnetic recording and reproducing apparatus. The new type of magnetic recording and reproducing apparatus has been made as small as possible in order to further increase user convenience. Of course, efforts are being made to reduce the weight.

In general, one of the biggest influences on the size and weight of the product is known as the deck size, and the size and size of the deck can be reduced depending on how much the deck size is reduced. It is a measure of the technology level, and in fact, each advanced company has been researched and developed in various forms and ways.

The magnetic recording and reproducing apparatus according to the related art is provided with a tension adjusting device which provides an appropriate tension to a magnetic tape forming a predetermined travel path, thereby increasing driving stability of the magnetic tape.

As the tape tension control device of the magnetic recording and reproducing apparatus is known, when the tension lever is rotated by driving the odometer in the unloading state of the magnetic tape, the tension pole provided in the tension lever drives the magnetic tape to move the magnetic tape. At the same time as the path is formed, a tension band wound around the supply reel assembly is provided to impart proper tension to the magnetic tape, thereby increasing the running stability of the magnetic tape.

However, in the above-described conventional tape tension control apparatus of the magnetic recording and reproducing apparatus, the magnetic tape is damaged when tension is applied to the magnetic tape in the process of switching from the PB mode to the STOP mode and left for a long time. Accordingly, when the PB mode is again performed in the STOP mode, the head drum cannot be easily started.

In addition, as a structure in which tension is continuously added to the magnetic tape even during the loading operation of the magnetic tape, there are various problems such as the rotation of the head drum being not smooth.

Therefore, the main object of the present invention is to release the tension of the magnetic tape in the process of switching from the PB mode to the STOP mode to prevent damage to the magnetic tape when left for a long time, and to easily start the head drum when performing the PB mode again It is to provide a tape tension control device of a magnetic recorder so that it can be used.

Another object of the present invention relates to a tape tension adjusting device of a magnetic recording / reproducing apparatus which prevents excessive tension from being applied to the magnetic tape during the loading operation of the magnetic tape, thereby making the rotation of the head drum smoother.

1 and 2 show the deck mechanism of the magnetic recording player equipped with the tape tensioning device of the present invention,

1 is a plan view in a state where the sub chassis is coupled;

2 is a plan view in a state where the sub chassis is removed.

3 is a plan view showing a PB mode of a magnetic recording / playback apparatus according to the present invention;

Figures 4a, b to 6a, b shows the configuration and operation of the tape tension control device of the magnetic recording player according to the present invention,

4A and 4B are plan views showing a PB mode state.

5A and 5B are plan views showing a PB → STOP progress state.

6A and 6B are plan views showing a STOP mode state.

<Explanation of symbols for main parts of drawing>

2 ; Subchassis 4; Function plate

4a; Locking pin 5; Tension post

9; Tension lever 10; Supply reel assembly

102; Elastic means 103; Locking pin

110; Power relay means 111; Shaft pin

112; Cam ball 113, 114; First and second cam part

In order to achieve the object of the present invention as described above, the sub-chassis in which the tape cassette is accommodated in the main chassis is installed to enable linear reciprocating movement in the front-rear direction, and the tension lever provided with the tension post is linked to the movement operation of the sub-chassis. In the tape tension adjusting device of the magnetic recording and reproducing apparatus to adjust the tension of the magnetic tape, the slide means is installed to enable a linear reciprocating motion by the drive of the drive source on the main base, and in a specific mode in conjunction with the slide means Provided is a tape tension control apparatus for a magnetic recording and reproducing apparatus comprising a power relay means for controlling a position of a tension lever.

The power repeater is rotatably installed at a predetermined portion of the sub-chassis, and a cam is formed at one end thereof, and the slide means is coupled to the cam to control the position of the tension lever by the movement of the slide means.

The power relay means has a first cam portion and a second cam portion guided to the engaging portion of the tension lever on the other side, respectively, and configured to control the position of the tension lever by the first cam portion and the second cam portion. do.

Hereinafter, the tape tension adjusting device of the magnetic recording and playback apparatus according to the present invention will be described according to the embodiment shown in the accompanying drawings.

1 and 2 show a deck mechanism of a magnetic recorder equipped with a tape tensioning device of the present invention, FIG. 1 is a plan view of a sub-chassis coupled state, and FIG. Top view.

3 is a plan view showing the PB mode of the magnetic recording player according to the present invention, and FIGS. 4A, B to 6A, B are plan views showing the structure and operation of the tape tension control apparatus of the magnetic recording player according to the present invention.

First, the structural features of the magnetic recording and reproducing apparatus to which the supply-side tape guide device of the present invention is applied are as follows.

That is, the deck mechanism of the magnetic recorder according to the present invention includes a traveling system for driving the reel of the tape cassette by using one power source, that is, the power of the capstan motor M, and a loading for moving the tape of the tape cassette to the travel path. The system is configured to selectively drive the system.

The loading system can be divided into supply side pole base driving means, winding side pole base driving means interlocked with the supply side pole base driving means, and loading system power transmission adjusting means in view of its technical configuration and operation.

Looking at the configuration of the deck mechanism of the magnetic recorder according to the present invention as described above, the sub-chassis (2) on the upper surface of the main base (1) under the guidance of the usual guide means to enable linear reciprocating movement by a predetermined length The cam gear 3 is rotatably coupled to one side of the upper surface of the main base 1, that is, the lower side of the sub chassis 2, so that the main base 1 adjacent to the cam gear 3 is rotated. The other side of the upper surface is provided with a power transmission means for transmitting the power of the capstan motor (M) to the cam gear (3), and a function plate (4) on the upper side of the cam gear (3) and the power transmission means cam gear By the rotation of (3), it is coupled so that a linear reciprocation movement by a predetermined length in the left and right directions is possible.

The sub-chassis 2 includes a traveling system, a supply side pole base driving means and a winding side pole base driving means which constitute the loading system, and a supply reel assembly 10 and a winding reel assembly 20 provided at predetermined intervals. ), Supply and take-up brake means (11) (21) for applying braking force to the supply reel assembly (10) and the take-up reel assembly (20), and tape tension control means for adjusting the tape tension in the tape loading state. And the pinch roller 6, the tape guide 7, and the like.

The tape tension adjusting means is coupled to a predetermined portion of the sub chassis 2 so as to be rotatable about a shaft pin 8, and a tension lever 9 having a tension post 5 at one end of the upper surface thereof, and the tension lever ( It is connected to one side of 9 and sensed on the outer peripheral surface of the supply reel assembly 10, the tension band 101, the elastic means 102 for elastically supporting the tension lever 9 in one direction, and the function plate (4) It includes a power relay means 110 for appropriately controlling the position of the tension lever (9) in accordance with the movement of the.

The locking pin 103 is fixed to the end of the tension lever 9 so that the power relay 110 supports the locking pin 103 to regulate the movement of the tension lever 9.

The power repeater 110 is installed to be rotatable by the shaft pin 111 at a predetermined portion of the sub chassis 2, and the cam hole 112 is formed in a predetermined shape at one side thereof, and the cam hole 112 is formed. A connecting pin 4a fixed to a predetermined portion of the function plate 4 is inserted into the portion.

In addition, the first cam portion 113 and the second cam portion 114 guided to the locking pin 103 of the tension lever 9 are formed at the other side of the power relay means 110, respectively.

The first cam portion 113 is formed in a relatively wide space to enable the flow of the locking pin 103, the second cam portion 114 is formed in a width substantially similar to the diameter of the locking pin 103, When the locking pin 103 is located in the second cam 114, the flow of the tension lever 9 is prevented.

The power transmission means is coupled to the motor gear 31 of the capstan motor (M), the drive gear pulley 32 is rotatably coupled to one side of the upper surface rear of the main base (1) and always engaged with the motor gear 31; A central gear pulley 36 coupled to the upper front middle portion of the main base 1 by a shaft pin 33 and having upper and lower gears 34 and 35 of different diameters integrally formed thereon; A timing belt 37 connecting the pulley 32 and the center gear pulley 36, and a gear train for selectively transmitting the rotational force of the center gear pulley 36 to the cam gear 3; Doing.

The gear train includes a first power transmission gear 38 selectively engaged with the lower gear 35 of the center gear pulley 36 and a second power transmission gear always engaged with the first power transmission gear 38. 39 and a third power transmission gear 40 which is always engaged with the second power transmission gear 39 and the cam gear 3.

An operating lever 42 having a predetermined shape is rotatably coupled to the rotation center axis 41 of the second power transmission gear 39, and a first power transmission gear is connected to one end of the operating lever 42. 38 is rotatably coupled to the shaft pin 43, so that the rotational force of the central gear pulley 36 is transmitted or blocked to the first power transmission gear 38 in accordance with the rotational operation of the operating lever 42. It is.

The function plate 4 is supported to allow left and right linear movement by conventional guide means, and the first cam pin 4 ′ fixed to a predetermined portion is the first cam groove 3a of the cam gear 3. Is inserted into the, and the linear reciprocating movement in the left and right directions in accordance with the rotation of the cam gear (3).

In addition, the interlocking lever 51 is coupled to the upper front edge portion of the main base 1 so as to be rotatable by the shaft pin 52, and the engaging pin 53 is fixed to the end of the interlocking lever 51. And a second cam pin 51 'is fixed to a predetermined portion of the interlock lever 51, and the second cam pin 51' is made of the cam gear 3. 2 is inserted into the cam groove 3b, and the sub chassis 2 is moved by interlocking the interlocking lever 51 with the rotation of the cam gear 3.

Meanwhile, the traveling system includes an idle plate 61 rotatably coupled to an upper end of a shaft pin 33 on which a center gear pulley 36 is supported and protrudes to an upper surface of the sub chassis 2, and the idle plate 61. Are rotatably coupled to the shaft pin 62 and selectively engaged with the reel gears 10a and 20a of the supply reel assembly 10 or the take-up reel assembly 20 according to the rotational direction of the center gear pulley 36. Gear 63 and idler power transmission control means for preventing the rotational force of the idle gear 63 is transmitted to the supply reel assembly 10 in a particular mode.

In addition, the supply side pole base driving means of the loading system is a rotary lever method that does not use a separate guide rail. Looking at the technical configuration, the shaft pin ( 71 and a shaft pin 73 on the upper surface of the rear sub-chassis 2 of the supply-side loading arm 72 and the supply side loading arm 72 rotatably coupled to the loading operation of the sub-chassis 2. It is rotatably coupled and interlocked with the supply side loading arm 72 and the supply side pole 74 is erected on one side and includes a fixed supply side pole base 75. Gear portions 72a and 75a are respectively formed at opposing portions of the supply side loading arm 72 and the supply side pole base 75 so as to be meshed with each other.

A guide hole 72b is formed at one side of the supply side loading arm 72, and a locking pin 76 fixed to the upper surface of the function plate 4 is inserted into the guide hole 72b.

Torsion spring (77) is elastically installed on the supply side loading arm (72), a part of which passes through the movement path of the guide hole (72b), the locking pin (76) in accordance with the movement of the function plate (4) ) Is guided by the guide hole 72b to move while receiving the elastic force of the torsion spring (77).

The operation of the magnetic recording and reproducing apparatus according to the present invention configured as described above is as follows.

FIG. 2 shows the ESP mode of the magnetic recorder according to the present invention, in which the sub chassis 2 is maximally ejected from the main base 1, and the function plate 4 is the rightmost on the main base 1. Located in

When the tape cassette is mounted in the cassette housing (not shown) in such a state, power is applied to the capstan motor M by the seating operation of the cassette housing so that the motor gear 31 rotates counterclockwise.

The rotational force of the motor gear 31 is transmitted to the drive gear pulley 32 → timing belt 37 → center gear pulley 36 to rotate the center gear pulley 36 clockwise.

At this time, the rotational force of the center gear pulley 36 is again lower gear 35 → first power transmission gear 38 → second power transmission gear 39 → third power transmission gear 40 → cam gear ( 3) the idle gear 63 which rotates the cam gear 3 clockwise and meshes with the upper gear 34 formed in the center gear pulley 36 by the rotation of the center gear pulley 36. Rotated).

At this time, since the idle plate 61 has a rotational force in the clockwise direction with respect to the shaft pin 33 which is the rotation center, the idle gear 63 is engaged with the reel gear 20a of the take-up reel assembly 20, and thus Rotate the take-up reel hub of the tape cassette to release the magnetic tape.

On the other hand, the sub-chassis 2 faces the inside of the main base 1 by the rotational operation of the interlocking lever 51 connecting the main base 1 and the sub chassis 2 by the rotation of the cam gear 3. The movement of the loading system is performed by the movement of the sub-chassis 2 just before the movement.

That is, since the supply side loading arm 72 is coupled to the engaging pin 76 of the function plate 4, the sub chassis 2 is assembled to the sub chassis 2 as the sub chassis 2 moves to the inside of the main base 1. The supply side loading arm 72 rotates clockwise about the shaft pin 71, so that the supply side pole base 75 which maintains the gear side with the supply side loading arm 72 is half the center pin 73. While rotating clockwise, the tension lever 9 also rotates counterclockwise about the shaft pin 8 along the cam groove formed in the main base 1.

Therefore, the magnetic tape of the tape cassette is moved to both sides of the rotating head drum which is rotating at high speed by the supply side pawl 74 of the supply side loading arm 72 and the traveling element such as the tension post 5 of the tension lever 9. Loaded.

Then, when the cam gear 3 rotates slightly further clockwise at the time when the loading operation of the magnetic tape is almost completed, the function plate 4 moves to the left in the drawing, so that the locking pin of the function plate 4 is rotated. 76 moves along the guide hole 72b of the supply side loading arm 72 to push one side of the elastic member 77, and thus the force pushing the elastic member 77 is transmitted to the supply side loading arm 72. To securely hold the supply side loading arm 72.

At this time, since the function plate 4 is moved to the left side and its connecting pin 4a is inserted into the cam hole 112 of the power repeating means 110, the power repeating means as the position of the cam hole 112 is changed. 110 rotates clockwise, and at the same time, the tension lever 9 is further rotated counterclockwise by the restoring force of the elastic means (102).

3 and 4a and b show the PB mode in which the loading operation of the magnetic tape is completed. In this PB mode, the pinch roller 6 and the tape guide 7 are also completely moved to the tape travel guide position. The pinch roller 6 is pressed against the shaft S of the capstan motor M at a predetermined pressure to enable the running of the tape.

In the PB mode, the function plate 4 is moved to the left side, and the power relay unit 110 is rotated clockwise by the movement, and the tension lever 9 is maintained in the counterclockwise direction. will be.

At this time, since the engaging pin 103 of the tension lever 9 is located in the first cam portion 113 of the power relay means 110, the rotation lever 9 is not restricted in the rotation operation, accordingly The tension of the magnetic tape is adjusted while rotating at a predetermined angle.

On the other hand, when the STOP mode signal is applied in the PB mode as described above, the motor gear 31 of the capstan motor M is rotated in the reverse direction, that is, clockwise, so that the cam gear 3 is rotated by a predetermined angle. As a result, the function plate 4 moves in the reverse direction by a predetermined length, and the pinch roller 6 is spaced apart from the shaft S of the capstan motor M so that the traveling operation of the magnetic tape is not performed.

At the same time, as shown in FIGS. 5A and 5B, as the function plate 4 moves to the right, the external force applied to the supply side brake means 11 is removed, and the supply side brake means 11 rotates clockwise. The power relay means 110 is counterclockwise due to the shape of the cam hole 112 into which the locking pin 4a is inserted in accordance with the movement of the function plate 4. The locking pin 103 of the tension lever 9 is positioned between the first cam portion 113 and the second cam portion 114 of the power repeater 110 by rotating by a predetermined angle. As shown in the figure, when the function plate 8 moves a little more to reach the STOP mode, the power relay 110 and the tension lever 9 interlock with each other by the amount of movement, thereby releasing the tension of the magnetic tape. At this time, the hook of the tension lever 9 is connected to the second cam groove 114 of the power repeater 110. Since the rim pin 103 is located, the rotation of the tension lever 9 is restrained.

On the other hand, in the case of progressing from the STOP mode to the PB mode, the function plate (4) is moved to the left in the order of Figure 6a, b → 5a, b → 4a, b in the reverse direction, and finally the PB mode In this case, since the locking pin 103 of the tension lever 9 is positioned on the first cam portion 113 of the power relay 110, the tension pin 9 can be freely adjusted without being affected by the locking pin 103.

The tape tension adjusting device of the magnetic recording / playback apparatus according to the present invention as described above is not limited to the embodiments described in the detailed description and shown in the drawings. Accordingly, various modifications may be made without departing from the spirit of the inventive concept of the claims of this invention and its dependent claims.

As described above, the tape tension control apparatus of the magnetic recording and reproducing apparatus according to the present invention includes a slide means installed to enable linear reciprocating motion by driving of a driving source on a main base, and a tension lever in a specific mode while being interlocked with the slide means. By including the power relay to control the position of the position by switching the magnetic tape in the process of switching from the PB mode to STOP mode to prevent damage to the magnetic tape when left for a long time, and when performing the PB mode again Makes the drum easier to start.

In addition, even during the loading operation of the magnetic tape, the tension post moves to a position where tension is not applied as compared to that in the PB mode, thereby preventing excessive tension on the magnetic tape during loading, thereby smoothing the rotation of the head drum. Has the effect of.

Claims (3)

A magnetic recording player in which a sub-chassis in which a tape cassette is stored in the main chassis is installed to reciprocate linearly in the front-rear direction, and a tension lever provided with a tension post adjusts the tension of the magnetic tape while being linked to the movement of the sub-chassis. In the tape tension control device of Slide means is installed to enable a linear reciprocating motion by the drive of the drive source on the main base, And a power relay means for controlling the position of the tension lever in a specific mode while being linked to the slide means. The apparatus of claim 1, wherein the power repeater is rotatably installed at a predetermined portion of the sub chassis, and a cam is formed at one end thereof, and a slide means is coupled to the cam. According to claim 2, wherein the power relay means is formed on the other side of the first cam portion and the second cam portion which is guided to the engaging portion of the tension lever, respectively, the first cam portion and the second cam portion by the position of the tension lever Tape tension control device for a magnetic recording and reproducing, characterized in that configured to control.