KR960010028B1 - Tape feeding device of vcr - Google Patents

Abstract

The feeding device conveys a loaded tape rapidly and includes a tape speed governor guide operating part located at a cam gear for driving a pinch roller and a tension arm, and a tape speed governor guide with a rotating member to be located between an A/C head and a capstern shaft to dislocate the tape from the A/C head. The device saves the time required for converting from FF/REW mode into PLAY mode to perform retrieving of the screen quickly.

Description

V-R al's Tape Overspeed Conveyor

1 is a plan view showing a conventional tape running system of V-Cal.

Figure 2 is a plan view showing a pinch roller drive system of a conventional V-Cal.

3 is a plan view showing a conventional tension arm drive system.

4 is a plan view showing a tape running system of V-Cal according to the present invention.

5 is a plan view showing the main configuration of the tape speed transfer device according to the present invention.

6 is a partial longitudinal cross-sectional view of FIG.

7 is a plan view showing a cam groove formed on the bottom surface of the cam gear according to the present invention.

* Explanation of symbols for main parts of the drawings

3: capstan shaft 4: pinch roller

5: Tension Post 11 ': Cam Gear

11'a, 11'b: Cam groove 13: Pinch roller

50: tape governing guide means 51: tape governing guide lever

52: Tape governing guide roller 53: Tape governing guide operating portion

The present invention relates to a tape speed feed device of V-Cal. In particular, the cassette is completed, and at the same time the standby mode is immediately before the play mode (Standby mode) to enable the FF / REW mode in the standby mode screen The present invention relates to a tape feed control device of V-Cal that enables faster and easier searching.

FIG. 1 is a plan view showing a conventional tape running system of V-Cal. The guide rollers 1 and 1 'of the inclined guide post assembly and the inclined post are provided on both sides of the front part of the deck as shown in phantom by mounting a cassette on the deck. When the tape is loaded while (2, 2 ') is positioned, the inclined post assembly will lead the tape and move along the loading groove (not shown) of the loading base to be in the same state as the solid line mark in FIG. At the same time, the pinch roller drive unit 10 shown in FIG. 2 is driven to squeeze the pinch roller 4 onto the capstan shaft 3, and to give a constant tension to the tape T, as shown in FIG. The tension post 5 is moved by driving the tension arm driver 30.

In Fig. 1, 6 and 6 'are cassette guide rollers, 7 are inertial rollers, 8 are full-amplification heads, 9 are A / C posts, 9' are A / C heads, 11 are chem gears, and 40 are tape guide rollers. Each one is seen.

The pinch roller driver 10 and the tension arm driver 30 will be described with reference to FIGS. 2 and 3 as follows.

As shown in FIG. 2, the cam gear 11 having the cam groove 11a is rotated by the power of the motor at the rear portion of the capstan shaft 3 that is pressed against the pinch roller 4 and moves the tape T. The pinch lever 13 having the guide pin 12 inserted into the cam groove 11a of the cam gear 11 is rotatably installed around the shaft 13b. 13, a gear portion 13a on a predetermined arc is formed.

The female gear 14 is engaged with the gear portion 13a of the pinch lever 13, and the interlocking lever 15 having the engaging surface 15a is fixed to the lower side of the female gear 14.

The pinch roller assembly 20 is installed at one side of the pinch lever 13.

The pinch roller assembly 20 includes a pinch roller lever 21 having a pinch roller 4, a plurality of interlocking links 22, 23, 24, and a plate 26 elastically supported by the coil spring 25. And an actuating protrusion 27 formed on the pinch roller lever 21 and in contact with the engaging surface 15a of the interlock lever 15 to drive the pinch roller assembly 20.

In addition, the female gear 14 is formed with a guide projection (28).

The guide protrusion 28 of the arm gear 14 is inserted into the guide groove 31a formed at one end of the tension operation plate 31 of the tension arm driving unit 30 as shown in FIG.

In the tension actuating plate 31, guide holes 31b and 31c formed at both sides thereof are inserted into the guide pins 32 and 32 'to enable reciprocating motion.

In addition, the tension arm 33 having the tension post 5 shown in FIG. 1 is elastically supported by the coil spring 34 and rotatably installed around the hinge pin 35.

The support protrusion 33a fixed to the lower side of the tension arm 33 is provided with an operation protrusion 36 in contact with an end of the tension operation plate 31, and a tension fixed to one side of the tension arm 33. The band 37 is wound around the supply reel 38 and fixed to the fixing piece 39.

In the drawing, the a-b section shows a spiral trajectory and the b-c section shows a concentric trajectory in the cam groove 11a of the cam gear 11.

In the conventional V-Cal configured as described above, the cassette is seated on the deck so that the tape T is guided to the inside of the tension post 5 of the tension arm 33 and the guide posts 1 and 1 'of the inclined post assembly and the inclined post 2. 2 '), when the cam gear 11 is rotated in the clockwise direction, the guide pin 12 inserted into the cam groove 11a of the cam gear 11 is guided to the diameter of the cam groove 11a. The pinch lever 13 is rotated counterclockwise while the relative position is moved to this small portion, and the arm gear 14 engaged with the gear portion 13a of the pinch lever 13 is rotated clockwise, The interlocking lever 15 rotates (clockwise) integrally with the female gear 14 and pushes the actuating protrusion 27 of the pinch roller lever 21 so that the pinch lever 21 rotates counterclockwise to its tip portion. The pinch roller 3 provided is pressed against the capstan shaft 3.

At the same time, the guide protrusion 28 of the rotating arm gear 14 pushes the end of the tension actuating plate 31 so that the tension actuating plate 31 moves in the direction of the arrow in FIG. The tension arm 33 connected by the spring 34 is rotated counterclockwise around the hinge pin 35. As a result, the guide rollers 1 and 1 ′ move while moving in the direction in which the tension force 5 opens. And a constant tension is applied to the tape T loaded by the inclined guide posts 2 and 2 '.

On the other hand, the unloading operation of the tape proceeds in the reverse of the operation at the time of loading.

However, in the conventional tape traveling system, as shown in FIG. 1, when the high speed driving in the FF / REW mode is performed while the loading of the tape T is completed, the tension of the tape T is increased and even To avoid this, the tape (T) will be damaged, so you will need to unload the tape, run the FF / REW mode, and then load the tape again to find the screen, which will increase the time required to search the screen. There was a problem such as being.

Accordingly, an object of the present invention is to maintain a separate stand by mode in which the tension of the tape is minimized at the same time as the cassette is mounted, and the screen can be searched more quickly by performing the FF / REW mode in this state. It is to provide a V-Ral tape overspeed feeder.

Another object of the present invention is to allow the user to search the desired screen more quickly by making the operation of the FF / REW mode faster.

In order to achieve the object of the present invention, in the governing conveying device for conveying the tape in a state in which the tape is loaded, the tape speed guide operating portion formed on the cam gear for driving the pinch roller and the tension arm, and guides the tape to one end. The rotating member is installed between the A / C head and the capstan shaft, and the tape speed guide means for moving the tape to the rotating member in conjunction with the operating portion of the cam during the conveyance of the tape to move away from the A / C head Provided is a tape feed control device of V-AL characterized in that it is provided.

Hereinafter, the tape speed transfer device of V-Cal according to the present invention will be described in detail according to the embodiment shown in the accompanying drawings. If necessary in the following description, it will be described with reference to FIGS. 1 to 3.

In the present invention, as shown in FIG. 4, the tape traveling system is disposed at both sides of the deck and the front part to provide guide rollers 1 and 1 'and inclined posts 2 and 2' for loading and unloading the tape. The pinch roller assembly 20 having the inclined guide post assembly having a branch, the pinch roller 4 for attaching the tape T to the capstan shaft 3, and the pinch roller assembly 20 are driven to drive the pinch roller ( 4, the pinch roller drive unit 10 (first and second degree needle guides) for operating the capstan shaft 3 in the contacted and disengaged position with the capstan shaft 3, and the tension post 5 at the tip to give a constant tension to the tape. And a tension arm drive unit 30 for actuating the tension arm 33, and a tape speed guide for activating the tape from the A / C head 9 'when the tape is transported. Means 50.

The inclined guide post assembly, the pinch roller assembly 20, the pinch roller driver 10, and the tension arm driver 30 are the same as the prior art shown in FIGS. 1 to 3, and the pinch roller driver The cam groove 11'a which is formed on the bottom surface of the cam gear 11 'constituting the 10 and guides the guide pin 12 of the pinch lever 13 of the pinch roller assembly 20 is different. will be.

In Fig. 4, 6 and 6 'are cassette guide rollers, 7 are inertial rollers, 8 are full-width erasing heads, and 9 are A / C posts.

The cam groove 11'a formed on the bottom surface of the cam gear 11 'constituting the tension arm driver 10 has a spiral section ab section, a bc section which is a concentric circle section, and a concentric circle section section as shown in FIG. It consists of a cd section which is a concentric circle section, and the radius of the concentric circle trace of the cd section is the same radius as that of the cam groove 11a of the conventional cam gear 11 shown in FIG. The radius of the trajectory is made larger than the radius of the cd section.

The tape fastening guide means 50 includes a tape fastening guide lever 51 which is slidably installed at a position between the A / C head 9 'and the capstan shaft 3, and the tape fastening guide lever 51 Is installed on the top of the tape gear guide roller 52 and the cam gear 11 'which is installed at the tip of the tape and contacts and detaches the tape with respect to the A / C head 9'. And a tape speed guide operating track 53 for driving the tape speed guide roller 52 installed at the tip thereof to be moved between a position where the tape is brought into contact with the A / C head 9 'and a position where the tape is released. do.

The tape fastening guide lever 51 is formed to be linearly movably movable by forming a guide slot 51a in the middle thereof and inserting the guide pin 54 fixed to the chassis in the guide slot 51a.

Between the tape speed guide lever 51 and the chassis, an elastic member 55 such as a tension spring for elastically supporting the lever 51 in a direction in which the roller 52 provided at the tip thereof is separated from the tape is connected. In the drawing, 51b and 56 are hook pieces which are formed on the lever 51 and the chassis to hang both ends of the elastic member 55.

The rear end of the lever 51 is in communication with the tape speed guide operating trajectory 53 formed on the upper surface of the cam gear 11 '.

In the illustrated example, the cam groove is formed as the operation trajectory portion 11'a formed on the upper surface of the cam gear 11 'and the operation pin 57 is formed at the rear end of the lever 51 so that the cam gear 11' is formed. The lever 51 is configured to slide in response to a change in the position of the actuating pin 57 relative to the cam groove as it rotates.

As the operation piece 57 is positioned in each section of the cam groove, the lever 51 is configured to slide.

The operation trajectory portion 11'a is formed of a concentric circular trajectory a-b section, a spiral trajectory b-c interval, and a concentric circular trajectory c-d interval having a smaller radius than the a-b interval.

Referring to the operating state of the V-Cal tape speed transfer device according to the present invention configured as described above are as follows.

When the cassette tape is mounted on the V-C to which the present invention is applied, the guide rollers 1 and 1 'and the inclined posts 2 and 2' of the inclined post assembly lead and move the tape T as shown in FIG. As shown in FIG. 2, the tension post 5 is more relaxed than in the play mode, and the pottery and tape speed guide rollers 52 are also relaxed than in the play mode. It is kept in the standby mode to keep it spaced apart from the / C post 9 and the A / C head 9 '.

Here, the loading operation of the tape by the warp phosph assembly is made as in the prior art.

When the tension post 5 relaxes the tape than in the play mode, immediately after the tape is mounted, the guide pin 12 formed at the tip of the pinch lever 13 has a cam groove formed at the bottom of the cam gear 11 '. Since the diameter of the bc section is slightly larger than that of the cd section where the guide pin 12 is positioned in the play mode, the pinch lever 13 is positioned in the play mode. As the female gear 14, which is kept slightly rotated in the clockwise direction and is engaged with the gear portion 13a of the pinch lever 13, is rotated slightly counterclockwise than in the play mode, the female gear Guide protrusions 28 formed on the 14 push the tension actuation plate 31 in the direction opposite to the arrow in FIG. 3, and thus the end of the tension actuation plate 31 actuates the actuation protrusion 36 of the tension arm 33. As shown in FIG. ) Is pushed to the left in the drawing, so the tension arm 33 And in a slightly rotated in the clockwise direction than in the play mode, it will be eventually a tension posts 5 as in the degree of claim 4 maintain a solid line shown in a state in which a tape slack.

On the other hand, the process of separating the tape T from the A / C post 9 and the A / C head 9 'by the tape speed guide means 50, the tape speed guide means 50 immediately after the tape is mounted. The actuating pin 57 of the tape speed guide lever 51 of FIG. 5) is located in the bc section, which is a concentric section of the section of the tape speed guide operating track 53 formed on the upper surface of the cam gear 11 '. Since the diameter of the bc section is slightly larger than the diameter of the cd section where the operation pin 57 is located in the play mode, the tape speed guide lever 51 is slightly pushed in the opposite direction to the arrow in FIG. Accordingly, the tape speed guide guide roller 52 formed at the front end of the tape speed guide lever 51 is positioned in a solid line in FIG. 4, and the tape T is in the A / C post 9 and the A / C head. Being kept away from (9 ') All.

When the FF / REW mode operation is performed in the standby mode as described above, the tape T is kept in a relaxed state by the tension post 5 and the A / C post 9 by the tape speed guide roller 52. And the taper is kept away from the A / C head 9 'so that the overall tension is kept relaxed and the tape contact point is reduced, so that the tape can run at high speed during FF / REW operation. It is possible to prevent the tape from being damaged by tension.

On the other hand, when the play mode command is issued in the standby mode, the cam gear 11 'is rotated clockwise so that the guide pin 12 formed at the tip of the pinch lever 13 has a cam groove formed at the bottom of the cam gear 11'. (11'a) is located in the cd section which is the smallest section diameter, the pinch lever 13 is rotated in the counterclockwise direction than in the standby mode, the arm is engaged with the gear portion (13a) As the gear 14 rotates in the clockwise direction, the guide projection 28 moves in the direction of the arrow of FIG. 3 in the guide groove 31a of the tension actuating plate 31, so that the tension actuating plate 31 moves in the direction of the arrow. The tension post 5 formed at the tip of the tension arm 33 is rotated counterclockwise by rotating the tension arm 33 connected through the coil spring 34 while moving to the tape T. As shown in FIG. ) And tension required during play mode It is.

On the other hand, the actuating pins 57 formed at the rear end of the lever 51 of the tape fastening guide means 50 have the smallest diameter among the sections of the tape fastening guide actuating portion 53 formed on the upper surface of the cam gear 11 '. The lever 51 is moved in the direction of the arrow of FIG. 5 as it is located in the section cd, which is a section. As a result, the tape T moves while the roller 52 installed at the tip thereof moves as shown by the virtual line of FIG. It is maintained in close contact with the / C post 9 and the A / C head 9 ', and the play mode can be progressed.

At this time, the motion trajectory of the tape speed guide roller 52 is related to the motion of the tape speed guide roller 52 by making the capstan shaft 3 parallel to the contact direction of the tape T contacted by the pinch roller 4. It is possible to keep the wrapping angle of the tape wound around the capstan shaft 3 without being constant.

In addition, when the wrapping angle of the rotating element is increased and the wrapping angle of the fixing element is reduced or eliminated, the tension increase rate of the fixing element is about 10 compared to the tension increase rate of the rotating element. In consideration of the fact that it is larger than twice, the lapping angle of the guide roller 1 ', which is a rotating element, is increased, the lapping angle of the tension post 5, which is a fixing element, is reduced, and the lapping angle of the A / C post 9 is reduced. By eliminating the angle of view, high-speed driving is possible in performing the FF / REW mode in the standby mode.

As described above, according to the present invention, after the FF / REW mode is executed in the standby mode, the tape is already wound on the head drum in the standby mode and tension is applied to the tape only by the tension post 5. In addition, only the partial operation of bringing the tape into close contact with the A / C post 9 and the A / C head 9 'by the tape speed guide roller 52 is performed. The time required for the conversion is greatly shortened, so that the screen can be quickly searched.

Claims (5)

In the governing feeder for conveying the tape at a speed when the tape is loaded, the tape governing guide operating portion formed on the pinch roller and the cam gear driving the tension arm, and the rotating member for guiding the tape at one end thereof are provided with the A / C head. It is installed to be located between the capstan shaft and a tape speed guide means for moving the rotating member in conjunction with the operating portion of the cam during the conveyance of the tape to move the tape away from the A / C head Tape Velocity Feeder. The cam groove formed on the bottom surface of the cam gear to drive the pinch roller and the tension arm has a spiral locus ab section, a concentric locus bc section, and a concentric locus cd section having a diameter smaller than the bc section. Tape feed control device of VCC characterized in that formed by. According to claim 1, wherein the tape speed guide guide portion formed in the cam gear is formed of a spiral track ac section, a concentric trajectory cd section having a diameter smaller than the concentric circle bc section characterized in that the tape speed of V-Cal Conveying device. According to claim 1, wherein said tape speed guide means is a tape feed control device of V-AL characterized in that the elastic member is configured to be in close contact with the tape speed guide operating portion of the cam gear. The method of claim 1, wherein the movement trajectory of the rotation guide member of the tape speed guide means is to be parallel to the direction of the tape in contact with the capstan shaft so that the wrapping angle of the tape wound around the capstan shaft is constant. SEAL's tape overspeed feeder.

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