JPH04115329U - tape guide device - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the running stability of the tape from being impaired due to the tape wrapping around the opposite side of the pinch roller from the capstan. [Structure] A capstan 13 is supported near a drum 11 having a magnetic head, a loading ring 14 is rotatably supported around the drum 11 and the capstan 13, and a return roller 15, Attach the pinch roller 16 and the guide roller 17 with the pinch roller 16 positioned in the middle,
In the tape guide device, the loading ring 14 is rotated with the return roller 15 at the top to pull out the tape T during loading, and the pinch roller 16 is pressed against the capstan 13 via the tape T during recording and reproduction.
When the pinch roller 16 is used for recording and reproducing, the outer circumferential portion of the opposite side of the capstan 13 is located outside the outer circumferential portion of the guide roller 17 with respect to the rotation center of the loading ring 14, and the outer circumferential portion of the return roller 15 is aligned with the rotation center of the loading ring 14. On the other hand, it is arranged so as to be located closer to the capstan 13 than the tangent line connecting it to the outer peripheral part.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea was used in magnetic tape recording and reproducing devices such as video tape recorders (VTRs). A flexible tape guide device, especially a tape guide that uses the U loading method. Regarding equipment.

0002

[Conventional technology]

In conventional VTRs that use the U loading method, as shown in Figure 4, the magnetic head A capstan 91 is disposed near the drum 90 having a head, and the drum 90 A loading ring is rotatably provided around the. This loading ring Remove the return roller 92, pinch roller 93, multiple guide rollers 94, etc. and place the pinch roller 93 between the return roller 92 and the guide roller 94. do.

0003 In such VTRs, when loading a tape, the contents of the cassette are After the tape T suspended between the reels 95 is pulled out by the pull-out roller 96, etc. Place the feeding ring so that the return roller 92 is positioned at the beginning with respect to the tape T. Rotate and pull out the tape T further by the return roller 92, and pull out the tape T further. It is guided by idle rollers 94 and wound around the drum 90. And when recording and playing back In this case, the tape T is compressed between the pinch roller 93 and the capstan 91 to close the cap. The tape T is made to run by the rotation of the push button 91.

0004

[Problem that the idea aims to solve]

However, in such a U-loading type VTR, the recording and playback At times, etc., the pinch roller 93 is guided by the outer circumference on the opposite side of the capstan The outer periphery on the outside with respect to the center of the trajectory of the roller 94 and the center of the trajectory of the return roller 92. The pinch roller 93 In addition to the part that contacts the capstan 91 (contact part), the capstan 91 The tape T also comes into contact with the part on the opposite side (reverse side part), and the running of the tape T becomes unstable. There was a problem that

[0005] That is, the pinch roller 93 is made of an elastic material such as rubber and is connected to the capstan 91. Due to pressure contact, the diameter of the contact part is smaller than the diameter of the opposite side and the circumferential speed of these parts is reduced. are different. Therefore, the relative running speed of the tape T in contact with these parts is also different. , slippage between the pinch roller 93 and the tape T that would make the running of the tape T unstable is avoided. I couldn't kick it. This idea was made in view of the above problem, and allows the tape T to run stably. The purpose is to provide a U-loading type tape guide device that can do.

[0006]

[Means to solve the problem]

In order to achieve the above object, this invention has a key installed near the drum that has the magnetic head. In addition to supporting the capstan, the load is placed around the drum and capstan. The loading ring is rotatably supported, and a return roller is attached to this loading ring. Install the pinch roller and guide roller with the pinch roller in the middle, When loading, rotate the loading ring with the return roller at the beginning. Pull out the tape and connect the pinch roller to the capstan through the tape during recording and playback. In a tape guide device for pressure bonding, the pinch roller is used when recording and reproducing the key. The outer periphery of the guide roller on the opposite side to the loading ring rotates. During rotation of the loading ring of the outer periphery outward from the center and the return roller so that it is located closer to the capstan than the tangent line connecting the outer peripheral part to the center. Placed.

[0007]

[Effect]

The tape guide device of this invention uses the pinch roller of the pinch roller when the tape is running. Since the opposite side is located closer to the capstan than the tangent line, the pinch roller cap Wrap the tape less or not at all on the opposite side of the push button. This makes it possible to stabilize the running of the tape.

[0008]

【Example】

Hereinafter, embodiments of this invention will be described with reference to the drawings. Figures 1, 2 and 3 show the main parts of a tape guide device according to an embodiment of this invention. It is a top view showing the operation in chronological order.

[0009] In the figure, 11 is a drum having a magnetic head, and the drum 11 is on the chassis 10. is rotatably supported. There is an audio control head around this drum 11. A card 12, a capstan 13, an erasing head 60, a guide roller 61, etc. are provided. In addition, these drum 11, control head 12 and capstan 13 A loading ring 14 is rotatably provided around the . As is well known, The capstan 13 is connected to a capstan motor and serves as a key during recording and playback. It is driven and rotated by a capstan motor.

0010 Although not shown, there is a cassette holder on the right side of the loading ring 14 in the figure. is provided, and a cassette is loaded into this cassette holder. And this cassette A tension pole 19 and a plurality of pull-out rollers 20 ( (only one shown) are arranged. As is well known, the tension pole 19 is It is attached to a swinging tension arm and touches the tape T to adjust the tape tension. make a clause Further, the pull-out roller 20 is attached to the pull-out arm, and the pull-out roller 20 is Then, pull out the tape T in the cassette together with the tension pole 19.

[0011] The loading ring 14 includes a return roller 15, a pinch roller 16, and a guide. Rollers 17 and 18 are arranged in a counterclockwise direction, and a pinch roller 16 is provided. It is located between the return roller 15 and the guide roller 17. loading ring 14 is driven and rotated by a loading motor (not shown) during loading. , the return roller 15 is connected to the pull-out roller 20 etc. when the loading ring 14 rotates. Position yourself at the beginning of the tape T that has been pulled out further and pull out the tape T further. Wrap it around ram 11. The guide rollers 17 and 18 are arranged around the drum 11. It contacts the tape T and guides the tape T.

0012 The pinch roller 16 is attached to a support arm 50 and is attached to the support arm 50. Therefore, it is swingably supported by the guide roller 17. The support arm 50 has a proximal end. It is rotatably supported coaxially by the idle roller 17, and the pinch roller 17 rotates at the tip. freely supported.

[0013] Although not shown clearly in the figure, the pinch roller 16 is a roller portion made of an elastic material such as rubber. It has flange parts at both ends, and the roller part contacts the capstan 13 and the capstan 13, the tape T is compressed. At the bottom of this pinch roller 16 in the figure is a pressing section. The material 51 is arranged so as to be able to engage with the flange portion, and the pinch roller 16 is attached to the upper and lower flange portions. By engaging and disengaging the pressing member 51 with the support arm 50, the cap It is pressed against the tongue 13 and separated.

[0014] The pressing member 51 has a pair of pressing portions 51a in a substantially V-shaped groove, and has a pair of pressing portions 51a in the shape of a substantially V-shaped groove. fixed at one end. This pressing member 51 has a pressing portion 51a that is connected to the pinch roller 16. Press the flange. The pressing arm 52 has a central portion attached to the chassis 10 with a support shaft 53. The other end is provided with a cam piece 52a, and the other end is connected to an electric power source. It is connected to the plunger 54a of the magnetic actuator 54.

[0015] This pressing arm 52 connects the vicinity of the pressing member 51 and the electromagnetic actuator 54. A spring 55 is stretched between the housing and a ring stop on the cam piece 52a. A pin 71 fixed to the arm 70 is engaged. This pressing arm 52 is a spring The direction in which the pressing member 51 is separated from the pinch roller 16 by the grip 55, that is, the direction shown in the figure It is biased in the direction of rotation.

[0016] The ring stop arm 70 has a substantially doglegged shape, and its bent portion swings against the chassis 10. Supported for free movement. The ring stop arm 70 has the above-mentioned pin 7 at one end. 1 is installed upright, and the other end is in contact with a pin 73 vertically installed on the back surface of the loading ring 14. It has a contact arm portion 70a that can be contacted. This ring stop arm 70 is When loading the loading ring 14, the abutment arm 70a rotates. It comes into contact with the pin 73 and is driven by the loading ring 14, and rotates clockwise in the figure. The pin 71 drives the pressing arm 52 counterclockwise. In addition, 74 and 75 are stopper pins that define the maximum swing position of the ring stop arm 70 It is.

[0017] The electromagnetic actuator 54 is attached to the chassis 10 and has a solenoid shown. Not connected to a drive circuit. This electromagnetic actuator 54 has a solenoid. The plunger 54a is activated when the solenoid is energized during recording or playback. The pressing arm 52 is actuated in the direction of sinking into the housing, and the pressing arm 52 is swung in the counterclockwise direction. let

[0018] The tape guide device of this embodiment uses the U loading method. Therefore, during loading, first, the tension arm and the pull-out arm swing. , the tape in the cassette is pulled out by the pull-out roller 20 and the tension roller 19. pulled out from inside the kit.

[0019] Subsequently, as shown in FIG. 1, the loading ring 14 was rotated and pulled out. Return roller 15, pinch roller 16 and guide roller 17 toward the tape , 18 move the return roller 15 to the top, and the return roller 15 moves the tape Then pull it out and wrap it around the drum 11. Also, at this time, this loading ring The rotation of the ring 14 causes the pin 73 to come into contact with the contact arm portion 70a of the ring stop arm 70. The ring stop arm 70 is pushed by the pin 73 and the loading ring 14, it swings clockwise. Therefore, the pressing arm 52 The pin 73 slides on the arm piece 52a and swings in the counterclockwise direction, and the pressing member 51 Approach Tyrola 16.

[0020] After this, the contact arm portion 70a of the ring stop arm 70 is attached to the stopper pin 75. As the loading ring 14 comes into contact with the The arm 52 also stops swinging. In this state, as shown in Figure 2, the tape T is The tape T is wrapped around the pinch roller 15, and the tape T is in contact with the outer part of the pinch roller 16. However, the pinch roller 16 is separated from the capstan 13. therefore , the tape is located between the pinch roller 16 and the capstan 13, and the tape is located between the pinch roller 16 and the capstan 13. It is separated from 13.

[0021] Next, the electromagnetic actuator 54 is energized and the plunger 54a is retracted. (downward in the figure), and the pressing arm 52 resists the elastic force of the spring 55 and moves backward in the figure. Rocks clockwise. Therefore, as shown in FIG. a comes into contact with the flange of the pinch roller 16, and the pinch roller 16 is attached to the capstan. 13, the pinch roller 16 is pressed against the capstan 13, and the tape is is compressed between the pinch roller 16 and the capstan 13.

[0022] In this state, as is clear from FIG. 3, the pinch roller 16 is a pressing member. 51 and is largely displaced toward the capstan 13 side, and the pinch roller 16 There is a small amount of tape between the guide roller 17 and tension roller 19 on the outside part. It's just a matter of contact. Therefore, after this, the capstan 13 is driven and the Even when the tape runs, the running stability of the tape is not affected significantly. .

[0023] In the above embodiment, the outer portion of the pinch roller 16 is Although it makes slight contact with the tape, move the pinch roller 16 closer to the capstan 13 side. The outer part of the pinch roller 16 does not come into contact with the tape at all when the pinch roller 16 is displaced greatly and the tape runs. It is also possible to configure it so that it does not touch.

[0024]

[Effect of the idea]

As explained above, according to the tape guide device of this invention, the tape travels Sometimes the opposite side of the pinch roller opposite the capstan does not come into contact with the tape. , or even if there is contact, the tape is configured so that it only makes slight contact. The effect of stabilizing driving can be obtained.

[Submission date] March 13, 1992

[Procedural amendment 1]

[Name of document to be amended] Specification

[Correction target item name] 0010

[Correction method] Change

[Correction details]

Although not shown, a cassette holder is provided on the right side of the loading ring 14 in the drawing, and a cassette is loaded into this cassette holder. A tension pole 19 and a plurality of pull-out rollers 20 are arranged between the cassette holder and the drum 11. As is well known, the tension pole 19 is attached to a swinging tension arm and contacts the tape T to adjust the tape tension. Further, the pull-out roller 20 is attached to the pull-out arm, and pulls out the tape T in the cassette together with the tension pole 19 during loading.

[Procedural amendment 2]

[Name of document to be amended] Specification

[Correction target item name] 0019

[Correction method] Change

[Correction details]

Subsequently, as shown in FIG. 1, the loading ring 14 rotates, and the return roller 15, pinch roller 16, and guide rollers 17 and 18 move toward the pulled-out tape T , with the return roller 15 at the top. Then, the return roller 15 further pulls out the tape T and winds it around the drum 11. Also, at this time, the pin 73 comes into contact with the contact arm part 70a of the ring stop arm 70 due to the rotation of the loading ring 14, and the ring stop arm 70 is pushed by the pin 73 and rotates clockwise as the loading ring 14 rotates. to sway. Therefore, the pin 71 of the pressing arm 52 slides on the cam piece 52a and swings counterclockwise, so that the pressing member 51 approaches the pinch roller 16.

[Procedural amendment 3]

[Name of document to be amended] Specification

[Correction target item name] 0022

[Correction method] Change

[Correction details]

In this state, as is clear from FIG. 3, the pinch roller 16 is pressed by the pressing member 51 and is largely displaced toward the capstan 13, and there is a guide roller 17 and a guide roller 17 on the outside of the pinch roller 16. The tape T contacts only slightly with the return roller 15 . Therefore, even if the capstan 13 is subsequently driven and the tape T runs, the running stability of the tape T is not significantly affected.

[Brief explanation of drawings]

[Fig. 1] A plan view of the main parts of a tape guide device according to an embodiment of this invention.

[Figure 2] A plan view showing the same main parts in a different state from Figure 1

[Figure 3] A plan view showing the same essential parts in a different state from Figures 1 and 2.

[Figure 4] Schematic plan view of a conventional tape guide device

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11... Drum, 13... Capstan, 14... Loading ring, 15... Return roller, 16... Pinch roller, 50... Support arm, 51... Pressing member, 52...・
- Pressing arm, 52a... cam piece, 54... electromagnetic actuator, 55... spring, 70... ring stop arm, 70a... contact arm portion, 71, 73... pin.

Claims (1)

[Scope of utility model registration request] Claim 1: A capstan is supported near a drum having a magnetic head, and a loading ring is rotatably supported around these drums and the capstan, and a return roller, a pinch roller, and a guide roller are attached to this loading ring. In the tape guide device, the pinch roller is installed with the pinch roller located in the middle, and during loading, the loading ring is rotated with the return roller at the beginning to pull out the tape, and during recording and playback, the pinch roller is pressed against the capstan via the tape. When the roller is used for recording and reproduction, the outer circumferential portion on the opposite side of the capstan is the outer circumferential portion of the guide roller that is outward with respect to the rotation center of the loading ring, and the outer circumferential portion of the return roller that is outward with respect to the rotation center of the loading ring. A tape guide device characterized in that the tape guide device is arranged so as to be located closer to the capstan than a connecting tangent.