KR880000030B1 - Tape loading apparatus of video tape recorder - Google Patents

Abstract

Each working post except fixed post among guide posts which guide the tape when working, a pinch-roller and a tension post are installed in the mouth of video tape cassett all together and all kinds of functional parts are put in the smaller area. So the minimized size for the tape load equipment can be offered.

Description

Tape Loading Device for 8mm Video Tape Recorder

1 is a plan view showing a tape unloading state of the tape loading apparatus of the present invention.

2 is a plan view showing a tape loading state of the tape loading apparatus of the present invention.

3 is a plan view showing a tape loading completion state of the tape loading apparatus of the present invention.

4 is a plan view showing a tape FF / REW state of the tape loading apparatus of the present invention.

5 is a partial cross-sectional view of the present invention showing the connection structure of the transfer lever and the loading ring installed in the loading path with the tape unloaded.

6 is a partial plan view of the present invention showing a connection structure of the transfer lever and the loading ring.

* Explanation of symbols for main parts of the drawings

1: tape cassette 5: opening

6, 6 ': Arc guide 8: Rotating head drum

9: base plate 10, 11: left and right loading paths

10 ', 11': guide 12,13: upper and lower loading ring

14: loading motor 15: loading gear

16 gear 17, 19 middle gear

18: rotating shaft 20: feed lever

21, 22, 23, 28, 29: operation guide post

24, 25: rotating lever 30: pinch roller

31: Pinch Roller Arm 33: Tension Post

34: Tension arm 35, 36: Inclined guide post

37: mute head 38: voice-control head

39: capstan shaft 40, 41: fixed guide post

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape loading apparatus of a video tape recorder (hereinafter referred to as VTI AL), and more particularly to a tape loading apparatus suitable for a small structure such as 8 mm VTI and capable of stably loading tape. will be.

The VHS method and the beta pomat (β-max) method which are conventionally used are mainly used, but these methods are small, such as 8mm VTI because of the large size of the head drum assembly or the cassette itself. Not only difficult to apply to the structure, there was a problem that is not suitable for the construction of a precise and compatible mechanism.

The present invention was devised to solve the above problems of the conventional VTI, and the main purpose of the present invention is to fix the opening of the video cassette (aka: month) in a fixed position of each guide post for guiding the tape when driving. Miniature tape loading in which the various functional parts are arranged in a smaller area by allowing each movable guide post, the pinch roller, and the tension post except the posts to fit entirely into the opening of the video tape cassette (hereinafter referred to as cassette). It is to provide a device.

Another purpose of the present invention is to fix the two guide posts installed around the rotating head drum of the guide posts inclined vertically and to make the rest vertical, and also the head of the erasing head, voice control head, capstan shaft, pinch The rollers and the tension arms are also installed vertically so that the tape travels as stable as possible on the rotating head drum, and provides a tape loading device that runs stably while the tape comes out of the rotating head drum and is collected in the cassette.

Another object of the present invention is the left and right movable guide posts which are drilled in the loading base plate and are carried on the left and right loading passes arranged on both sides around the head drum, and the tape of the head drum is drawn out from the cassette supply reel. The inlet side, i.e. the area where the tape enters, should be inclined up and down, and when it is wound around the outer circumferential surface of the rotating head drum, it will be stably contacted by a fixed guide post installed inclined at the inlet and outlet side. It is to provide a tape loading device that can be stably run by vertical to always the same height to the portion to enter the cassette.

Another object of the present invention is to rotate the rotary levers installed on both sides of the opening of the cassette to the final position in the FF / REW mode of rapidly winding the tape without checking the image, and the tape drawn from the supply reel is arc guide inside the cassette. The present invention provides a tape loading device in which the FF / REW mode is performed without being unreasonable with the tape because it is rapidly wound away from the tape.

Objects and advantages of the present invention as described above will be described in detail with reference to FIGS. 1 to 6.

1 is a plan view showing the configuration of the present invention, 2 to 4 are plan views showing the working state, 5 and 6 are partial cross-sectional view showing the main configuration of the present invention, 1 is a cassette , 2 is supply reel, 3 is reel and 4 is tape. The tape 4 extends over the arc guides 6 and 6 'formed on both sides of the opening 5 of the cassette 1 except when loaded. 8 shows a rotating head drum which is inclined at the rear portion of the base plate 9, and circular left and right loading paths 10 and 11 are provided around the rotating head drum 8.

These left and right loading paths 10 and 11 have a top plate 10 " and 11 " in which a guide hole 10 ' Support plates 10 '' 'and 11' '' are bent downwards at both end portions of the upper plates 10 ", 11 " The lower end is fixed to the base plate 9. The top plate 10 ″ of the right loading path 10 forms a predetermined slope such that the height with respect to the base plate 9 gradually increases as it goes from front to back, and the top plate of the left loading path 11 ( 11 '' ') is installed at a position lower than the right loading path 10.

In addition, upper and lower loading rings 12 and 13 having a hollow portion having an inner diameter larger than the outer diameter of the rotating head drum 8 are provided around the lower portion of the rotating head drum 8. 12) A gear is formed on the outer circumferential surface of 13. 14 is a loading motor installed at one rear portion of the rotating head drum 8, and the loading gear 15 is fixed to the upper end of the rotating shaft of the loading motor 14, and the gear 16 is disposed below the loading gear 15. And the middle gear 17 is engaged with the upper side, and another intermediate gear 19 is fitted with the gear 16 at the lower end of the rotation shaft 18 of the intermediate gear 17, and is engaged with the gear 16. Lower intermediate gears 17 and 19 are engaged with the upper and lower loading rings 12 and 13, respectively.

Therefore, when the loading gear 15 rotates in the clockwise direction by the driving of the driving motor 14, the upper intermediate gear 17 rotates in the counterclockwise direction, and the rotational force of the loading gear 15 is transmitted through the gear 16. The lower middle gear 19 is rotated in the clockwise direction so that the upper and lower middle gears 17 and 19 rotate in opposite directions. Accordingly, the upper loading ring 12 is clockwise and the lower loading ring 13 is Each rotates counterclockwise.

The means for guiding rotation so that the driven double loading rings 12, 13 can be rotated without being released from the installed position slides several guide rollers having a small diameter on the inner circumference of the double loading rings 12, 13; Although it is preferable to install, the guide means of other structure may be provided.

In the figure, 20 is a transfer lever in which movable guide posts 21 and 22 are installed (mounted) at both ends. The transfer lever 20 is connected to the upper loading ring 12, and when the upper loading ring 12 rotates in the clockwise direction, the cassette 1 moves on the guide hole 10 'of the left loading path 10 by the rotational force. Is transferred from the opening part 5 of the to the tape inlet side of the rotary head drum 8.

The rotational trajectory of the upper loading ring 12 and the trajectory of the guide hole 10 'of the left loading path 10 are different, but the upper loading ring 12 and the transfer lever 20 are conventional ball joints (ball and socket). By using the joint) the movement of the transfer lever 20 can be made smoothly. That is, by forming a connecting shaft pin protruding from the lower surface of the upper loading ring 12, it is possible to use a structure for loosely fitting the guide hole of one side end of the connecting lever, as shown in FIG. 5 and FIG. As described above, guide holes 43 and 44 are formed at both ends of the plate-shaped connecting lever 42 of a predetermined length, and the connecting shaft pins 45 are formed to protrude to a predetermined length on the upper surface of the upper loading ring 12, respectively. The connecting shaft pin 45 of the upper loading ring 12 and the guide post 21 of the transfer lever 20 may be used to connect both side guide holes 43 and 44 to each other. The connection structure need not be limited thereto, and the guide hole 10 'of the left loading path 10 is gradually inclined by the rotational force of the upper loading ring 12 in which the transfer lever 20 rotates while drawing a circle trajectory. Other connection means may be used as long as the connection structure can be transported smoothly.

The movable guide post 23 is inserted into the guide hole 11 ′ of the right loading path 11 and is transferred to the tape outlet side of the rotating head drum 8 by the rotational force of the lower loading ring 13. The connection structure of the guide post 23 and the lower loading ring 13 is also used in the same structure as the connection structure of the movable guide post 21 and the upper loading ring 12 of the transfer lever 20.

On the other hand, on both sides of the opening 5 of the cassette 1, one end of the pivoting lever 24, 25 is rotatably condensed to the base plate 9 by the shaft pins 26, 27, and each pivoting lever 24 Movable guide posts 28 and 29 are installed at the other end of the 25 and are located inside the opening 5, and a pinch roller 30 is condensed at one end inside the right rotating lever 25. The arm 31 is rotatably compressed with the shaft pin 32 and the other end of the tension arm 34 in which the tension post 33 is placed at one end is condensed at the lower end of the shaft pin 26 of the left pivot lever 24. The tension post 33 is located inside the opening 5.

The pivot levers 24, 25, the pinch roller arm 31 and the tension arm 34 are rotated in the state shown in FIG. 3 at the time of loading the tape 4 by appropriate power transmission means, respectively. In the FF / REW mode, only the rotation levers 24 and 25 are rotated in the state shown in FIG.

The power transmission means for rotating the pivot lever 24, 25, the pinch roller arm 31 and the tension arm 34 may use the driving force of the loading motor 14 or other driving force. The power transmission means of the rotation levers 24 and 25 extends longer than the state of the front end of the rotation lever 24 to form a U-shaped groove in the extended tip thereof, and the upper loading ring 12 in the U-shaped groove. Protruding pins protruding from the upper surface of the rotating lever 24 is rotated as the upper loading ring 12 rotates, and a coil spring may be used to assist the operation. In addition, the tension arm 34 is provided with a coil spring for holding the tension box 34 counterclockwise in a state where the tip thereof is in contact with the movable guide post 21 of the feed lever 20, thereby providing the elastic force of the coil spring. It is preferable to rotate.

In the drawings, 35 and 36 are guide posts inclinedly fixed to the left middle part and the inlet side of the rotating head drum 8, and the inclined guide posts 35 and 36 are tapes 4 guided to the rotating head drum 8, respectively. The winding angle and travel position are regulated.

In the figure, 37 is an erasing head, 38 is a voice-control head, 39 is a capstan shaft, and fixed guide posts 40 and 41 are placed in front and rear of the capstan 39.

Referring to the effect of the present invention as described above is as follows.

1 shows the tape unloaded, in which the guide posts 21, 22, 23, 28 and 29, the tension post 33 and the pinch roller 30 are gathered in the opening 5 Will be.

When tape loading starts in such a state, the loading motor 14 is driven to rotate the loading gears 15 and 16 interlocked with the upper loading through the double intermediate gears 17 and 19. When the ring 12 is rotated counterclockwise and the lower loading ring 13 is rotated clockwise, the ring 12 is fixed to the left and right sides of the opening 5 of the cassette 1 and interlocked with the double loading ring 12 and 13. The rotating levers 24 and 25 are rotated in advance so that the movable guide posts 28 and 29 fixed to the respective rotation levers 24 and 25 are moved to their final positions as shown in FIG. As the transfer lever 20 connected to the upper loading ring 12 moves in the guide hole 10 ′ of the left loading path 10, the movable guide post 21 placed on the transfer lever 20 ( 22 is moved to the tape inlet side of the rotating head drum (8), the movable guide post (23) linked to the lower loading ring (13) of the right loading path (11) Take the inner hole (11 ') is moved toward the tape outlet of the rotary head drum 8. In addition, during this process, the tension post 33 is attached to the rear of the movable guide post 21 by the tension arm 34 by rotating the spring force, and the movable guide post 21 continues the movable guide post 21 when the movable guide post 21 continues. Since it is separated from the post 21 and is not limited to rotation, the tape 4 moves to the tension position so that the tape 4 is properly adhered to the erasing head 37 and the pinch roller 30 also rotates to squeeze the capstan shaft 39. do.

As described above, the tape 4 is pulled out by the transfer of the movable guide posts 21, 22, 23, 28, and 29, and mounted on the outer circumferential surface of the rotating head drum 8, as shown in FIG. The loading completion position is reached.

In this loading operation, the intermediate gears 17, 19 and the rowing rings 12, 13 are doubled, and the tape guide posts 21, 22 and 23 are rotated left and right, respectively, while being rotated forward and backward. The rotational force of the loading motor 14 is decelerated by the built-in power transmission mechanism to rotate the rest of the tape, and thus the tape take-out guide posts 28 and 29 and the tension post 33 are rotated. The pinch rollers 30 will complete the loading by their levers 24, 25, 34 and 31, respectively. At this time, looking at the running path of the tape, the tape (4) exiting the supply rail (2) is wound at a constant angle to the erase head (37) via the take-out guide post 28, while maintaining parallel and horizontal parallel state, and again It enters the inclined guide post 35 through the tension post 33, is divided in a constant inclination, and is sent while raising its center height to the tape guide post 22, and ascends to the tape guide post 21 again. The leading guide posts 21 and 22 were inside the opening 5 vertically in FIG. 1, but in the final position the left orthogonal path 10 was at an angle suitable for entry of the rotating head drum 8 of the tape 4 Since the two guide posts 21 and 22 are inclined in the same direction because they are inclined. The tape 4 passing through the tape guide post 22 enters the tape inlet side of the rotary head drum 8 while lowering its height again, and then wound on the rotary head drum 8 while winding the fixed inclined guide post 36. It is wound. The tape (4) exiting the rotating head drum (8) is wound on the exit guide post (46) as it exits the rotating head drum (8), thereby providing stable recording and playback on the rotating head drum (8). . Then, from the tape exit position of the drum 8, the fixed guide post 46, the acoustic control head 38, the guide posts 23 and 40, and the capstan shaft 39 are again maintained while the tape 4 is horizontal and vertical. As it passes by the guide post 41 and the movable guide post 29, it is wound by the winding reel 3 as it is in a parallel state.

Subsequently, when the tape is unloaded, all the operations at the time of loading are reversed. The movable guide posts 21, 22, 23, 28 and 29, the tension post 33, and the pinch roller 30 Double acting, all return to the inside of the opening part 5 in the state shown in FIG.

When performing the FF / REW function in the stop mode, as shown in FIG. 4, only the tape ejection guide posts 28 and 29 positioned on the left and right sides of the opening 5 are rotated by rotating the loading motor 14. The other guide posts and mechanisms remain in a position not reached by the tape (4) even though a small number of loading is moved, so that the tape (4) exiting the supply rail (2) is simply a rotating head drum ( 8) and away from the arc guides (6) (6 ') inside the tape cassette (1) are wound only on the left and right tape take-out guide posts (28) (29) and enter the take-up rail (3). The FF function is executed at high speed, and the reverse rotation function is also possible, so the FF / REW function is performed in the stop mode.

According to the present invention, various movable parts are installed in the opening of the cassette, and two fixing guide posts are inclined at the tape inlet side of the rotating head drum and the middle of the left loading guide plate. And a rotating lever having a movable guide post rotatably installed on both sides of the cassette opening and the cassette opening to perform the FF / REW mode. And it will have the advantage of contributing to the improvement of productivity. Partial structures such as the connecting means of the upper and lower loading rings and the transfer lever, the rotation lever, the tension arm, and the power transmission means for rotating the arm of the pinch roller will be easily solved by conventional techniques. There may be various embodiments.

The technical matters for making the opening of the tape cassette larger than usual are omitted in the above description, but are designed and manufactured while being compatible with various VT models.

In summary, the above-described effects of the present invention have a great advantage in terms of stable running of the tape because the present invention makes the running state of the tape suitable for the condition of each functional part. It is done in the ding state, but when fast forwarding is required, fast forwarding is performed smoothly by unloading the stop mode so that no part of the tape is in contact with it, and the state of the tape is parallel to the tape inlet / outlet position. And because it is made vertically, it can provide a functional advantage to promote stable running of the tape.

In addition, various movable parts can be installed to be located in the opening of the cassette, thereby making it simple in structure and miniaturizing the plane of the apparatus. Because it is vertically constructed, it is easy to manufacture and assemble, it is easy to realize high precision, and there is an advantage to reduce the number of processes.

Claims (2)

A double loading ring is formed on the base plate around the rotary head drum 8 and is driven by the loading motor 14 at the bottom of the loading path 10 and 11. 12, 13, and guide posts 21, 22, 23, 35, 36, 46, 40, 41, and tension posts 33 for guiding the running of the tape 4 are provided. ) Is installed around the drum 8, the movable guide posts 21, 22, 23 are vertically placed above the front ends of the loading paths 10, 11 and the left side of the drum 8. The inclined guide post 35 is fixed to the middle portion, and the inclined guide post 36 and the vertical guide post 46 are respectively placed on the tape inlet / outlet side of the drum 8, and the known capstan shaft 39 and its front After the guide posts 40 and 41 are vertically placed, the tape 4 runs vertically from the supply reel 2 to the inclined guide post 35 in the play mode, and the inclined guide post 35 The tape roll of the 8mm video tape recorder, which is guided inclined to the inlet side inclined guide post 36 and wound around the outer circumferential surface of the drum 8 and runs vertically from the guide post 42 to the winding reel 3. Ding device. 2. The lever 24 (25) according to claim 1, wherein one side end of the levers 24 and 25 is fixed to the hinges 26 and 27 fixed to both sides on the base plate of the deck on which the tape cassette 1 is seated. A movable guide post 28 for positioning the other end of the tape 25 in the opening 5 of the tape cassette 1 in the stop mode and withdrawing the tape 4 at the other end of each lever 24 or 25. (29) are placed vertically, and the levers 24 and 25 are rotated in the FF / REW mode so that the mode can be performed while the tape 4 is pulled out by the movable guide posts 28 and 29. On the other hand, a known tension post 33 for compressing one end of the tension arm 34 having a certain length with the same hinge 26 on the lower portion of the lever 24 and maintaining the tension of the tape 4 on the other end thereof. Is placed vertically so that the tension post 33 can be brought into close contact with the tape 4 to the erasing head 37 in the play mode. Tape loading device for video recorders.

Images