KR19980017832A - VRC's Tape Tension Control - Google Patents

Abstract

The present invention relates to a tape tension adjusting device of V-Cal, and more particularly, the tape may be rotated in accordance with the tension change added to the running tape, and the rotation of the supply reel is allowed by rotating the supply reel by rubbing around the supply reel. V-Tal's tape tension control system is designed to keep the ideal tension. Its purpose is to reduce the number of parts and simplify the configuration, while maintaining the tension control capability. To provide a tension control device.

The present invention and the felt 200 is fixed in the form of a band around the feed reel (10); Pressing pins 102 rotatably hinged to the main base 1 and configured to protrude pressurizing tapes at the front end, pressurizing parts 108 for limiting or allowing rotation of the supply reel by friction contacting the felt circumference at the rear end. It is characterized by a tension control device consisting of a tension control lever 100 having a).

Description

VRC's Tape Tension Control

The present invention relates to a tape tension adjusting device of V-Cal, and more particularly, the tape is moved or rotated in response to a tension change added to a running tape, and the feed reel is allowed to rotate by rubbing around the feed reel. It is about V-Tal's tape tension control system that allows you to drive with the ideal tension.

In general, V-RA is a device for recording an image signal on a magnetic recording tape or reproducing a recorded signal. The apparatus includes a traveling system for moving the tape T along a predetermined path as shown in FIG. And a supply reel 10 and a take-up reel 20 for supporting the tape cassette C and driving the tape T in the selected direction.

Gear portions 12 and 22 meshing with the idle gear 2 to be described later are formed at the peripheral edges of the supply reel 10 and the take-up reel 20, respectively. Break drums 14 and 24 are formed. In addition, a brake device is provided at the periphery of each of the brake drums 14 and 24 and the gear units 12 and 22 to limit the rotation of the reel if necessary. The brake device slips on the main brakes 16 and 26 and the brake drums 14 and 24, which mesh with the gears 12 and 22 to limit the rotation of the supply reel 10 and the take-up reel 20. Sub brakes 18 and 28 and band brakes 19 which are in contact with each other to generate rotational resistance. One side of the band brake 19 surrounding the periphery of the supply reel 10 is fixed to the main base 1, the other side spring 30a on the main base 1 so as to be movable in position according to the tension of the tape (T) It is connected to the tension adjustment lever 30 which is supported.

The traveling system is provided with a head drum assembly 40 including a head which rotates in contact with the tape T from the tape cassette C and records a signal on the tape T or reproduces the recorded signal. have. In addition, the odometer is provided with a sound reproduction head 42 for reproducing an audio signal, and is provided with a capstan shaft 52 that rotates by the capstan motor 50 and cooperates with the pinch roller 44 to drive the tape T. do.

And a reel driving device for driving any one of the reel selected from the supply reel 10 or the winding reel 20 receives power from the capstan motor 50 between the supply reel 10 and the take-up reel 20 It is installed.

The VR has a brake device that allows or restricts the rotation of the reels in various modes as described above. For example, Play, Reverse, Fast-forward (FF), and Rewind ( In performing various modes such as REW, Eject, Stop, etc., the brake device rotates to an appropriate position and limits or permits rotation of the supply reel 10 and the take-up reel 20. At this time, the sub brakes 18 and 28 and the band brake 19 restrict the rotation of the reel in the play or reverse play and stop mode of the tape to prevent the tape from being released from the reel.

In particular, the band brake 19 has a tension control function that is interlocked with the tension control lever 30 and acts on the tape, so that the frictional resistance of the band brake 19 with the supply reel 10 varies depending on the tension generated on the tape. The tape T is stably released from the supply reel 10 in the recording mode, which is one of the factors that plays a very important role in maintaining good image quality.

The band brake 19 includes a felt 31 mainly made of natural wool such as rabbit hair or fleece in order to give a friction torque to properly control the rotation of the reel. It gives a braking effect.

2 to 4 are shown in more detail the configuration of the tension adjustment lever and the band brake of the V-C according to the prior art. Looking at this, the hinge (30b) rotatably coupled to the main base (1) tape (T) at the tip Tension control lever 30 is provided with a pressing pin (30c) for protruding the pressure is provided. A pair of holders 34 are rotatably connected to the tension control lever 30 and the main base 1, respectively, and the fixing pins 34a protrude from one side thereof. A band 32 having a fixing hole 32a coupled to the fixing pin 34a is provided at both ends. Band 32 is configured to be flexible, mainly made of synthetic resin. In addition, there is provided a holder cap 35 to be fitted to each of the fixing holes 32a to fix the band 32 to the holder 34. Inside the band 32 is attached a felt 31 for improving the contact friction with the reel. The tension control lever 30 is supported by a spring 30a on the main base 1 to press the tape T in a direction away from the supply reel 10.

Thus, when the tape loading operation is started, the tension control lever 30 is rotated and the pressing pin 102 loads the tape T between the guide posts. In this state, the tape starts to run, and when the tension applied to the tape T of the main handle increases, the tension control lever 30 rotates clockwise around the hinge 30b, and the band brake 19 The frictional resistance with the supply reel 10 is reduced to smooth the tape unwinding, and the tape tension is lowered. On the contrary, when the tape tension becomes smaller, the tape T is stretched. ) Pulls the tension control lever 30, the pressure pin 30c of the tension control lever 30 presses the tape (T) and at the same time the band brake 19 restricts the rotation of the supply reel (10) The tension required for (T) is given. At this time, the rotation of the supply reel is not meant to mean the stop of the supply reel, but to achieve the rotation means to impart a frictional resistance to the rotation itself.

Such a tension control device has a complicated structure due to an increase in the number of parts, thereby having poor assembly and poor durability. That is, since the holder 34 and the fixing pin 34a and the holder cap 35 for connecting the band brake 19 and the tension control lever 30 should be provided, the number of parts increases as well as the band ( After inserting the holder cap 35 into the fixing pin 34a of the holder 34, the holder cap 35 must be press-fitted into each of the fixing pins 34a. 2) is formed at a certain distance and the fixing hole (32a) is formed in the band coincides with the respective fixing pin (34a) to process the gap between the fixing hole 32a and the fixing pin (34a) to a degree Difficulties were following.

In particular, since the fixing pin 34a is manufactured to have a relatively thin thickness, when the holder cap 35 is pressed, the fixing pin 34a may be broken and a new holder 34 needs to be prepared. And workability is poor.

In addition, the tension control device as described above had a problem that the tension control ability is slowed relatively quickly, and thus does not perform a smooth tension control function. That is, the tension control is performed by the contact between the felt 31 and the supply reel 10, which generates the actual frictional resistance, wherein the felt 31 generates heat by continuous friction contact with the supply reel 10, Due to the heat, the felt surface becomes smooth, which leads to a sharp drop in the friction coefficient and thus the loss of tension control.

In addition to the problem that the band 32 that is subjected to the frictional heat causes heat deformation to replace parts, in particular, the felt 31 and the band 32 are attached by an adhesive, so that the adhesive part is separated by frictional rotation. Of course, there are a number of problems, including the possibility that the felt 31 may be separated from the band 32 due to the heat generation as described above.

Accordingly, the present invention has been made in view of the conventional problems as described above, the object of the present invention is to provide a tape tension control device of V-CAL which can maintain a good tension control ability while reducing the number of parts, while simplifying the configuration. Is in.

Figure 1 is a plan view showing a schematic configuration of a typical VCA mechanism

Figure 2 is a plan view showing the configuration of a conventional tape tension control device

Figure 3 is a side cross-sectional view showing the configuration of a conventional tape tension control device

Figure 4 is an exploded perspective view showing a combination of the conventional band and the tension control lever

5 is a plan view showing the configuration of the tape tension adjusting device according to the present invention

Figure 6 is a side cross-sectional view showing the configuration of the tape tension adjusting device according to the present invention

Figure 7 is an enlarged view of the main portion of the tape tension adjusting device according to the present invention

Explanation of symbols on the main parts of the drawings

1: main base 10: supply reel

12: gear 14: brake drum

100: tension control lever 102: pressure pin

104: hinge 106: spring

108: pressurization portion 108a: toothed portion

200: felt 202: felt home

The object of the present invention as described above and the felt is fixed in the form of a band around the feed reel; Tension control consisting of a tension control lever rotatably hinged to the main base and a pressure pin for pressing the tape at the front end, and a tension control lever having a pressurizing part for limiting or allowing rotation of the supply reel in friction contact with the felt circumference at the rear end. It can be achieved by the device.

Hereinafter, a preferred embodiment of the VRT tape tension control device according to the present invention will be described. (The same configuration as in the prior art will be described with the same reference numerals.)

5 and 6 show the configuration of a preferred embodiment of the VT tape tension adjusting device according to the present invention. According to the present invention, the felt 200 is fixed to the periphery of the supply reel 10. The felt 200 is inserted into the felt groove 202 formed at a predetermined depth toward the radially inner side from the circumference of the brake drum 14 and is fixed to restrict the flow in the vertical direction. At this time, the felt 200 is fixed to the felt groove 202 by using an adhesive.

In addition, the present invention is provided with a tension control lever 100 is rotatably coupled to the hinge 104 to the main base (1) protruding the pressing pin 102 in contact with the tape (T) at the tip. The tension control lever 100 is supported by a spring 106 on the main base 1 such that the pressure pin 102 presses the tape T in a direction away from the supply reel 10.

On the other hand, the rear end of the tension control lever 100 is integrally configured to extend the pressing portion 108 in contact with the felt 200. The pressurization part 108 rotates together by the rotation of the tension control lever 100 and rotates to a position where it comes into contact with or falls off of the felt 200. In this case, the contact state allows rotation of the supply reel 10 by the contact force. Or limit the tape unwinding from the supply reel (10).

According to FIG. 7, the pressing portion 108 is configured to form a tooth portion 108a on one side to further increase the coefficient of friction with the felt 200. At this time, the toothed portion 108a is sensitive to the minute change of the tension control lever 100 so as to have an inclination opposite to the rotational direction of the felt 200, that is, clockwise as seen in FIG. 4. It is more effective to increase the resistance.

In the tape tension adjusting device of VRC according to the present invention having the configuration as described above, when the tape loading is completed, the pressing pin 102 of the tension control lever 100 is pressed to support the tape while maintaining a predetermined tension force. In this state, when the tension of the tape changes, the tension control lever 100 rotates, and accordingly, the pressing unit 108 further presses the periphery of the felt 200 or reduces the pressing force so that the rotational resistance of the supply reel 10 is reduced. By changing the pressure, the tension of the tape is coped with. That is, when the tension of the tape becomes stronger, the tension adjusting lever 100 rotates in the clockwise direction by the force of the tape T, so that the pressing unit 108 moves in a direction away from the felt 200 to supply the reel 10. ), So that the tape can be rotated more smoothly, the amount of tape (T) is released more than ever. Therefore, the tension force applied to the tape T becomes small.

On the other hand, when the tension force applied to the tape is less than the appropriate level, the tape is stretched so that the tension control lever 100 allows the clockwise rotation by the force of the spring 106. Therefore, the pressurizing portion 108 of the tension control lever 100 is in close contact with the felt 200 to limit the rotation of the supply reel 10, so that the sagging of the tape is compensated to achieve the optimal tension at all times to achieve a running .

As described above, the VT tape tension adjusting device according to the present invention forms a felt groove formed on the supply reel, and attaches and fixes the felt using an adhesive, etc., so that there is no fear of leaving the felt due to long-term use. As a matter of course, the pressure part integrally formed at the rear end of the tension control lever is in direct friction contact with the felt so that the tension of the tape can be controlled to reduce the number of parts, thereby simplifying the construction and improving the assemblability. will be.

Claims (4)

Felt 200 is fixed in the form of a strip around the feed reel (10); Pressing pins 102 rotatably hinged to the main base 1 and configured to protrude pressurizing tapes at the front end, pressurizing parts 108 for limiting or allowing rotation of the supply reel by friction contacting the felt circumference at the rear end. Tape tension adjusting device of V-AL made of a tension control lever 100 having a). The V 200 according to claim 1, wherein the felt 200 is inserted and bonded in an annular felt groove 202 which is formed at a predetermined depth radially inward from the periphery of the brake drum 14 of the supply reel 10. Tape tension adjuster. According to claim 1, V tension tape tension control device characterized in that the toothed portion (108a) is formed in the pressing portion of the tension control lever 100 to increase the friction force with the felt (200). [5] The tape tension adjusting device of claim 3, wherein the tooth portion (108a) is configured to be inclined in a direction corresponding to the rotation direction of the supply reel during regeneration.