JPS62256257A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To easily slide a tape onto a tilted cylinder drum by providing a tilted tape guide whose position is fixed to correct the tilt of the tape in addition to a movable tape guide. CONSTITUTION:Tape guides 15, 30 are moved attended with the tape loading. The two tape guides 15, 30 and tilted tape guides 60, 61 whose position is fixed guide the tape onto a cylinder drum 4. Since the tilt of the tape is corrected by the tilted tape guides 60, 61, the excellent slide state of the tape is kept easily with respect to the circumference of the tilted cylinder drum 4. Since the tilted tape guides 60, 61 are fixed, the constitution is simple and the positioning accuracy is attained easily and the proper slide contact of the tape to the cylinder drum 4 is obtained easily.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a magnetic recording and reproducing device that has a cylinder drum holding a rotating magnetic head and can be used as a video or audio tape recorder.

(Prior art) Magnetic recording and reproducing devices, such as video tape recorders and digital audio recorders, have a cylinder tram that holds a rotary magnetic nod and is tilted in a predetermined direction.
It has a tape loading mechanism that pulls out the tape from the cassette using two movable tape guides on both sides of the cylinder drum and winds the tape around the inclined cylinder drum. The tape guide in the tape loading mechanism is positioned against a stopper at the tape loading position. The tape guide is adapted to appropriately slide the tape onto the inclined circumferential surface of the cylinder drum when the tape guide is in contact with the stopper.

(Problems to be Solved by the Invention) According to the tape loading mechanism in the conventional magnetic recording/reproducing device, the tape is guided by two tape guides that move with the loading operation. It is extremely difficult to achieve accurate positioning of the guide, and a complicated positioning mechanism and troublesome adjustments are required to properly slide the tape onto the inclined cylinder drum.

The present invention has been made to solve these conventional problems, and provides a magnetic recording and reproducing device that has a simple structure and can easily and appropriately slide a tape onto an inclined cylinder drum. The purpose is to

(Means for Solving the Problems) The present invention provides a position fixing system that, when two tape guides are positioned at a tape loading position, is interposed between each of the tape guides and the cylinder drum to correct the inclination of the tape. It is characterized by having an inclined tape guide.

(Operation) When the two tape guides are positioned at the tape loading position, the tape is brought into sliding contact with the cylinder drum while being guided by the tape guides and the tilted tape guide whose position is fixed. The fixed-position slanted tape guide corrects the slant of the tape and provides proper sliding contact of the tape with the cylinder tram.

(Example) Hereinafter, an example of a magnetic recording/reproducing apparatus according to the present invention will be described with reference to the drawings. Although the magnetic recording/reproducing apparatus according to the illustrated embodiment is of a reverse type, the present invention is not limited to a reverse type.

FIG. 1 shows a state in which a tape cassette 1 is loaded and before tape loading. In FIG. 1, a part of the tape 2 stored in the cassette 1 is exposed from an example part of the cassette 1, and by loading the cassette into a predetermined position of the recording/reproducing device, the exposed part of the tape 2 is exposed. It faces the circumferential surface of the cylinder drum 4. Reference numeral 3 indicates a capstan shaft, and the capstan shaft 3 protrudes from the chassis and is rotationally driven in both directions by a capstan drive motor (not shown). The cylinder drum 4 holds a rotary magnetic head as is well known. As shown in FIG. 13, the drum 4 is inclined in the direction of a line a perpendicular to the line A connecting the center of the drum 4 and the center of the capstan shaft 3, but in FIG. Only the part corresponding to the center line of is shown.

A drive gear 5 rotatable by a shaft 6 is arranged outside the cylinder drum 4. The gear 5 is rotationally driven in both directions by a motor (not shown). An annular gear 7 is rotatably arranged around the drum 4 by an appropriate number of guide pins 8, and the driving gear 5 is engaged with the annular gear 7. A guide groove plate 9 as shown in FIG. 12 is arranged above the annular gear 7. The guide groove plate 9 has two guide grooves 9a and 9b that substantially follow the outer circumference of the drum 4. In FIG. 1, only these guide grooves 9a and 9b are shown virtually. These guide grooves 9a and 9b move the two pinch rollers 1O125 between the original position as shown in FIG. 1 and the tape loading position where the capstan shaft 3 can be pressed as shown in FIG. It serves as a guide when moving between locations.

1 to 3, a first pinch roller 10 is rotatably supported by a shaft 11 on a pinch roller support plate 12. As shown in FIGS. The pinch roller support plate 12 is rotatably mounted on the first support base 13 via a shaft 14.

A tape guide 15 is provided on the support base 13 integrally with appropriate pins. A coil spring 16 is wound around the bottle holding the tape guide 15, and each end of the spring 16 is hung on the protrusion 17 of the movable table 13 and the pinch roller support shaft 11, so that the pinch roller support plate 12 is attached to the shaft 1.
It is urged to rotate clockwise around 4. A protrusion 18 is formed by bending on the pinch roller support plate 12 to abut on the side edge of the moving table 13 to regulate the position of the pinch roller 10, and a contact portion is formed on the free end of the pinch roller support plate 12. 19 is formed by bending. A first guide pin 20 and a second guide pin 21 are formed on the lower surface of the moving table 13, and these guide pins 20, 21
is a guide groove 9a that serves as a guide for the movement of the pinch roller 10.
It is embedded in A drive plate 22 is connected to the guide pin 21 . A bottle 23 is fixed to the drive plate 22,
This bottle 23 is fitted into an escape groove 24 formed in the circumferential direction of the annular gear 7. A tension spring 38 is hung between the bottle 23 and a bottle 37 firmly supported by the annular gear 7. The spring 38 is for moving the drive plate 22 along the right side of the cylinder drum 4 when the annular gear 7 rotates counterclockwise in FIG.

In FIGS. 1 and 4, the second pinch roller 25 is supported on a pinch roller support plate 27 so as to be rotatable about a pinch roller support shaft 26. As shown in FIG. The pinch roller support plate 27 is rotatably mounted on the second movable table 28 by a shaft 29. The moving table 28 is provided with a tape guide 30 integrally with a bottle fixedly supported on the moving table 28. A coil spring 31 is wound around the support shaft of the tape guide 30.
Both ends of this spring are hooked on the protrusion 32 of the movable table 28 and the shaft 26, so that the pinch roller support plate 27 is urged to rotate counterclockwise in FIG. 1 about the shaft 29. The pinch roller support plate 27 has a protrusion 33 formed by bending to abut against the side edge of the moving base 28 and regulate the position of the pinch roller 25, and a contact portion 34 is formed at the free end of the pinch roller support plate 27. It is formed by bending.

A first guide pin 35 and a second guide pin 36 are firmly supported on the lower surface of the moving table 28, and these guide pins 35.3
6) is fitted into the guide 19b for guiding the movement of the second pinch roller 25.

In FIG. 1, FIG. 8, and FIG. 9, the annular gear 7 includes:
On the opposite side of the drive gear 5, a transmission gear 39 is engaged with the transmission gear 39, which rotates around the shaft 4o. A fan-shaped gear 41 whose rotation center is a shaft 42 is meshed with the transmission gear 39 .

A bottle 43 is firmly supported on the fan-shaped gear 41. Above shaft 4
2 is rotatably provided with a moving lever 44, and a bottle 45 is firmly supported on the lever 44. The bin 43 protrudes toward the lever 44 side, and the bin 45 protrudes toward the fan-shaped gear 41 side, and the two bins 43 and 45 are provided so as to be able to come into contact with each other.

A coil spring 46 is wound around the shaft 42, and by having both ends of the spring 46 hit the bins 43 and 45, the fan-shaped gear 41 and the lever 44 are biased in the direction in which the bins 43 and 45 come into contact with each other. has been done.

A long hole 47 is formed at the free end of the lever 44, and the guide pin 35 is fitted into this long hole 47. Therefore, when the lever 44 is rotated counterclockwise in FIG. 1, the moving table 28 and the pinch roller support plate 27 are moved along the guide groove 9b via the elongated hole 47 and the bottle 35.
Along with this, the pinch roller 25 moves on the left side of the cylinder drum 4.

In FIG. 1, a rotary drive body 48 and a cam 50, which are connected by a shaft 49, are arranged in the lower center part. These rotary drive body 48 and cam 50 are driven by a motor (not shown). There is a shaft 52 on the side of the cam 50, and a pinch roller position selection plate 51 is arranged so as to be rotatable about this shaft 52. Pinch roller position selection board 51
has three arms and is biased by a spring 53 to rotate counterclockwise in FIG. is in contact with. A long hole 54 is provided at the end of the other arm of the pinch roller position selection plate 51.
A bottle 56 fixed to one arm of the selection lever 55 is fitted into the hole. As shown in FIG. 7, the selection lever 55 is rotatable about the shaft 40, and
A regulation bottle 57 is fixed to the end of the other arm of 5.

The regulating pin 57 is for regulating the positions of the two pinch rollers 10.25 in the tape loading state and bringing these pinch rollers 10.25 into selective contact with the capstan shaft 3. 3 and the center of the cylinder drum 4.

In FIG. 1, reference numerals 58 and 59 indicate tension bins attached to tension levers (not shown), which in the original position as shown in FIG. position, and as the tension lever rotates due to the tape loading operation, the 11th
As shown in the figure, they are located on both sides of the cylinder drum 4, and during tape loading, their positions are fixed and serve as tape guides.

The chassis also has two inclined tape guides 60 and 61.
is provided at a fixed position, and guides the running of the tape 2 wound around the cylinder drum 4 by a cheap loading operation, and also guides the tape 2 from tilting to the cylinder drum 4.
It is designed to be corrected according to the slope.

A stopper 62 is fixed to the chassis on the side of the capstan shaft 3. The stopper 62 positions the pinch roller 10.25 in the tape loading state, and is a V-shaped regulating surface 62 that comes into contact with the pin 14 of the first moving table 13 to determine the position of the pinch roller 10.
a, and a V-shaped regulating surface 62b that comes into contact with the shaft 29 of the second moving table 28 to determine the position of the pinch roller 25,
Further, a tape guide 63 is provided integrally with the stand 62.

In FIGS. 1, 1O, and 11, the guide groove plate 9
A shaft 65 fixed to the lever 64 is fitted into the guide groove 9a. A tape guide 4 is provided on the shaft 65. The tape guide 64 is guided by the guide groove 9a and moves to a predetermined position as the annular gear 7 rotates. A pin 67 is fixed to the other end of the lever 64. The pin 67 is fitted into the relief groove 24 of the annular gear 7 and is pushed by a leaf spring 68 provided at the end of the relief groove 24, thereby moving the lever 66 to a predetermined position.

Note that the diameter of the shaft 65 is the same as that of the first and second guide pins 20 and 21.
The guide groove 9a that guides the movement of these shafts and guide pins is wider than the diameter of the shaft 65 in the movement range of the shaft 65, and the width of the guide groove 9a outside that range is wider than the diameter of the shaft 65. Since the width of the shaft 65 is set to be somewhat narrow to match the guide pins 20 and 21, the shaft 65 is pushed by the leaf spring 68 and positioned at a predetermined position at the end position of the width range of the guide groove 9a that matches the diameter of the shaft 65. It is now possible to do so.

The two tape guides 15 and 30 are inclined in a predetermined direction according to the inclination of the cylinder drum 4, as shown in FIG. It is designed to guide you smoothly. Further, the two tape guides 15, 30 move around the cylinder drum 4 and reach the tape loading position, as will be clear from the explanation of the operation below. On the other hand, two inclined tape guides 60 are provided with fixed positions on the chassis.
．． 61 is also inclined in a predetermined direction according to the inclination of the cylinder drum 4, as shown in FIG. 13, and when the two tape guides 15 and 30 are positioned at the tape loading position, the two tape guides 15.30
The tape 2 is interposed between the tape 2 and the cylinder drum 4 to correct the inclination of the tape 2, and to maintain a good sliding state of the tape 2 against the inclined circumferential surface of the cylinder drum 4.

Next, the operation of the above embodiment will be explained.

Now, in the state before tape loading as shown in FIG. 1, the pinch roller position selection plate 51 and the selection lever 55 are in the middle position of the rotation range, and the cam is moved so that the regulation pin 57 takes the middle position. 50 rotational positions are determined.

To load the tape from this state, first drive the tension lever using a drive mechanism (not shown) to move the tension pins 58, 59 to both sides of the drum 4, and then pull out a portion of the tape 2 from the cassette throat 1. .

Next, the drive gear 5 is rotated clockwise in FIG. 1, and the annular gear 7 is rotated counterclockwise.

Due to the rotation of the gear 7, this rotational force is applied to the pin 37 and the spring 38.
, drive plate 22, guide pin 21, moving table 13, shaft 14,
The first pinch roller 10 moves counterclockwise around the drum 4 along the guide groove 9a. On the other hand, the rotational force of the annular gear 7 is transmitted by the transmission gear 39, the sector gear 41, the pin 43, the spring 46,
The signal is transmitted to the pin 45 and the moving lever 44 in this order, and the lever 44 is rotated counterclockwise.The rotation of the lever 44 causes the moving table 2 to move through the elongated hole 47 and the guide pin 35.
8 is moved along the guide groove 9b, and in conjunction with this, the second pinch roller 25 moves clockwise on the left side of the drum 4.

In this way, as shown in FIGS. 5 and 11, the first pinch roller support plate 12 and the first movable table 13 move while being substantially reversed from their original positions, and the second pinch roller support plate 27 The second moving table 28 moves approximately in parallel, the shaft 14 fits into the restriction surface 62a of the stopper 62, the shaft 29 fits into the restriction surface 62b of the stopper 62, and the two pinch rollers 10
．． 25 are opposed to each other with the capstan shaft 3 interposed therebetween, and the contact portion 19 of the pinch roller support plate 12 and the contact portion 34 of the pinch roller support plate 27 are opposed to each other with the regulation pin 57 interposed therebetween. At this point, the regulation pin 57 is in the intermediate position as described above, and the two abutting portions 19.34 contact the regulation pin 57, causing the two pinch roller support plates 12.27 to both move in the biasing direction. Rotation is restricted, and both pinch rollers 10.25 are spaced apart from the capstan shaft 3, as shown in FIGS. 5 and 6.

On the other hand, as the annular gear 7 rotates, the shaft 4.29 and the tape guide 15.30 move around the cylinder drum 4 in opposite directions to the position shown in FIG. As a result, the tape 2 is further pulled out from the cassette 1 and is applied to the outer peripheral surface of the cylinder drum 4 by approximately 240 mm.
Wound in an ``Ω'' shape over a range of degrees. The rotation of the annular gear 7 causes the lever 66 to move from the original position to the drum 4.
The tape guide 64 is moved to the substantially opposite side of the drum 4 along with this.

In this way, by detecting the end of movement of one pinch roller with the switch, the rotation of the drive gear 5 is stopped,
End tape loading operation. At the end of tape loading, tape 2 pulled out from cassette 1
, tension pin 59, tape guide 63, shaft 29,
Pinch roller 25, tape guide 30. Tape guide 6
1, drum 4, tape guide 60. tape guide 15,
A tape running path is formed by the pinch roller 10, shaft 14, tape guide 64, and tension pin 58 in this order.

Furthermore, at the end of the tape loading, fixed inclined tapes are fixed between the tape guide 15 positioned at the tape loading position and the cylinder drum 4, and between the tape guide 30 positioned at the tape loading position and the cylinder drum 4. Guides 60.6] are interposed, and these inclined tape guides 60.61 correct the skew of the tape 2 according to the inclination of the cylinder drum 4, and maintain good sliding contact of the tape 2 with the circumferential surface of the cylinder drum 4. It is designed to be retained.

As shown in FIG. 5, when tape loading is completed, the tape is not running yet. Also,
As shown in FIG. 6, two pinch rollers 10
．． The heights of the tapes 2 that are in contact with the tapes 25 are at the same height. Here, as shown in FIG. 11, when the cam 50 is rotated, the pinch roller selection plate 51 is rotated clockwise against the urging force, and the selection lever 55 is rotated counterclockwise. Pin 57 moves to the left. As a result, the pin i1i+1 pin 57 escapes from the contact portion 19 of the first pinch roller support plate 12, but remains in contact with the contact portion 34 of the second pinch roller support plate 27. Only the roller support plate 12 rotates in the urging direction, and the first pinch roller 10 presses the tape 2 against the capstan shaft 3. Drum 4 and capstan shaft 3
is rotated counterclockwise in advance at a constant speed, and by pressing the tape 2 against the capstan shaft 3, the tape 2 is transported at a constant speed in the direction of the arrow. As is well known, the rotary magnetic heel l'b held on the drum 4 performs recording and reproduction while diagonally scanning the tape 2, which is transported at a constant speed.

Although not shown, the take-up reel stand is driven to rotate as usual to wind up the tape. Further, in conjunction with the movement of the regulating pin 57 to the left, only the fixation of the position of the tension pin 59 is released, and the tape tension is adjusted.

Next, when recording and playing in reverse mode, the cam 50
, the pinch roller selection plate 51 is rotated in the urging direction, that is, counterclockwise in FIG. 11, and the selection lever 5 is rotated.
5 clockwise to move the regulating pin 57 to the right from the intermediate position. As a result, the regulation pin 57 escapes from the contact portion 34 of the second pinch roller support plate 27, but comes into contact with the contact portion of the first pinch roller support plate 12, so that the pinch roller support plate 27 Only the second pinch roller 25 rotates in the urging direction, and the second pinch roller 25 presses the tape 2 against the capstan shaft 3. In the reverse mode, since the capstan shaft 3 is rotated clockwise in advance, the tape 2 is transported in the opposite direction at a constant speed, and the rotary magnetic head scans the tape 2 diagonally while recording and reproducing. I do. Further, in conjunction with the movement of the regulation bin 57 to the right, the position of the tension bin 59 is fixed at the original position, the position fixation of the tension bin 58 is released, and the cape tension is adjusted. Note that the direction of rotation of the tram 4 in the reverse mode may be clockwise or counterclockwise as long as the directions during recording and playback are the same.

After the recording and playback is completed, by rotating the reel stand, a part of the tape 2 is wound into the cassette 1, and the annular gear 7 is driven to rotate in the opposite direction, returning to the original position as shown in FIG. reach. Since the bottle 23 is pushed by the end face of the relief groove 24, the pinch roller IO moves in the opposite direction in the guide groove 9a.

In this way, according to the above embodiment, the tape is not guided to the circumferential surface of the cylinder drum 40 only by the two tape guides 15.30 that move with the tape loading operation, but by the two tape guides "15.30" that move with the tape loading operation. and a fixed-position inclined tape guide 60.61 to guide the tape into the cylinder l:ram 4, and said inclined tape guide 60.6
1 corrects the inclination of the tape, it is possible to easily maintain good sliding contact of the tape with the circumferential surface of the inclined cylinder drum 4. Moreover, since the inclined tape guides 60, 61 are fixed in position, they are simple in structure, easy to achieve positioning accuracy, and can easily achieve an appropriate sliding contact state of the tape with respect to the cylinder drum 4.

In addition, the two tape guides 15. in the second embodiment.
30 itself may be vertical. Alternatively, the tape guides 15, 30 themselves may be vertical, and the tape guide surfaces may be spiral-shaped or inclined guide surfaces so that the tape is inclined in accordance with the inclination of the cylinder drum 4.

Further, the two tape guides that move with tape loading may be divided into a vertical tape guide and an inclined tape guide. Figures 14 and 15 show such a modified embodiment, but since most of the constituent members are the same as those of the previous embodiment, common parts are denoted by common reference numerals. be.

Therefore, the differences from the above embodiment will be explained as follows.
Code 120.270 is a pinch roller support plate, 130.2
80 is a support stand. One support stand 130 is provided with two tape guides 150, 151, and the other support stand is also provided with two tape guides 300, 301. The tape guide 150.300 is vertical, and the tape guide 1511.301 is provided at an angle according to the inclination of the cylinder drum 4. Each of the above tape guides 150.
Reference numerals 151, 300, and 301 are used to move the tape 2 to the position shown in the figure through a tape loading operation, pull out the tape 2 from the cassette, and bring the tape 2 into sliding contact with the circumferential surface of the cylinder drum 4. When the guides are positioned at the tape loading position, fixed inclined tape guides 60 and 61 are interposed between each tape guide and the cylinder drum 4 to correct the inclination of the tape 2 according to the inclination of the cylinder drum 4. It is supposed to be done.

The embodiments shown in FIGS. 14 and 15 also provide the same effects as the embodiments described above.

Note that in the embodiments of FIGS. 14 and 15, the inclined tape guide 151.301 may be fixed to the frame or chassis in the same way as the inclined tape guide 60.6I, if space permits. If you do this, you will not only have the inclined tape guide 60.61 but also the tape guide 151.30.
1 is also fixed in position, making it easier to correct the inclination of the tape 2.

(Effects of the Invention) According to the present invention, instead of guiding the tape to the circular surface of the cylinder drum using only the two tape guides that move with the tape loading operation, the tape is guided to the circular surface of the cylinder drum using only the two tape guides that are fixed in position. Since the tape is guided to the cylinder drum by the slanted tape guide and the slant of the tape is corrected by the slanted tape guide, it is possible to easily maintain good sliding contact of the tape with the circumferential surface of the slanted cylinder drum. Furthermore, since the inclined tape guide is fixed in position, it has a simple structure and can easily achieve positioning accuracy, and can easily achieve an appropriate sliding contact state of the tape with respect to the cylinder drum.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the magnetic recording/reproducing apparatus according to the present invention, FIG. 2 is a plan view showing a first pinch roller portion in the second embodiment, and FIG. FIG. 4 is a plan view showing the second pinch roller portion in the above embodiment, and FIG. 5 is a plane view showing the mode of the two pinch rollers in the tape loading state of the above embodiment. Figure 6 shows the two pinch rollers shown above
A side view seen from the direction of line ■-■ in the figure, FIG. 7 is a partial cross-sectional front view of a portion of the selection lever in the above embodiment, and FIG. 8 is a cross-sectional front view similarly showing a portion of the pinch roller moving mechanism. , No. 9
The figure is a sectional front view of another part of the pinch roller moving mechanism, FIG. 1O is a sectional front view showing a part of the tape guide mechanism in the above embodiment, and FIG. Fig. 12 is a plan view showing the guide groove plate in the embodiment described above, and Fig. 13 is a plan view showing the guide groove plate in the embodiment described in Fig. FIG. 14 is a plan view showing another embodiment of the magnetic recording/reproducing apparatus according to the present invention in a tape loading state, and FIG. 15 is a plan view showing the tape guide mechanism in the same embodiment. It is a top view which shows a part roughly. 1...Cassette, 2...Tape, 4...Cylinder drum, 15.30...Tape guide, 60.61...
(Koro-slanted tape guide. Up to 14El

Claims (1)

[Claims] The tape is pulled out from inside the cassette using two tape guides and brought into sliding contact with the circumferential surface of a cylinder drum that holds a rotary magnetic head and is inclined in a predetermined direction, so that the rotary magnetic head records or plays back on the tape. In the magnetic recording and reproducing apparatus, a tilted tape guide whose position is fixed is interposed between each of the tape guides and the cylinder drum to correct the tilt of the tape when each of the tape guides is positioned at the tape loading position. A magnetic recording/reproducing device characterized in that: