JPH01140457A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To contrive a compact device by setting a turning center position for a turning means so as to allow a moving locus of a pinch roller to intersect a moving locus of a guide roller. CONSTITUTION:A pinch roller pressing plate 78 and a pinch roller lever 82 are turnably supported by a shaft 76 on the tape take-up side. The pinch roller lever 82 has a pinch roller 75 at its tip part, and it is energized turnably counterclockwise by a spring 80. Consequently, when the lever 82 is turned around the shaft 76 against an energizing force, the pinch roller 75 is brought into pressing contact with a capstan 115. The location of the shaft 76 for the pinch roller lever 82 is determined so that the moving locus 133 of the pinch roller 75 is intersected in the vicinity of an intermediate position of its movement with the moving locus 134 of the guide roller 54. By this method, the turning fulcrum of the link for displacing the pinch roller can be disposed towards the center of the device, thus contriving the device in a compact size.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a digital audio tape recorder (hereinafter referred to as
The present invention relates to a magnetic recording/reproducing device that can be used for a DAT (abbreviated as DAT), and particularly relates to the arrangement of its tape loading mechanism and pinch roller moving mechanism.

(Prior Art) In the conventional DAT shown in FIG. 15, a rotating drum 407 including a magnetic head is provided with a predetermined angle inclined at a reference plane (chassis plane) perpendicular to the rotation axis of the tape reel. To explain an example of the tape path in this case, the tape T pulled out from the supply reel 401 in the tape cassette 400 is passed through a fixed guide 402 fixed to the chassis 418, a pin 403 provided on the tension arm, a fixed guide 404, a vertical It passes through a guide roller 405 and is further corrected by an upstream inclined guide 406 to correct the angle for wrapping around the rotating drum 407, and then is wound around the rotating drum 407.

Then, the tape T coming out of the rotating drum 407 is corrected to the original angle by an inclined guide 408 on the downstream side, passes through a vertical guide roller 409 and a fixed guide 410, and passes between a capstan shaft 411 and a pinch roller 412 that is crimped. passing through, swinging out guide roller 413, fixed guide 414
through the take-up reel 41 in the tape cassette 400.
It is wound up in 5.

The vertical guide roller 405 and the inclined guide 406 and the vertical guide roller 409 and the inclined guide 40B are fixed to the guide stands 416 and 417, respectively, and the guide stands 416°4
17 along guide grooves 419 and 420 formed in the chassis 418 by a required drive mechanism, the tape T is pulled out from inside the tape cassette 400, and the tape T is moved onto the rotating drum 40.
It is wrapped around 7. Here, the loading positions of the vertical guide rollers 405, 409 and the inclined guides 406, 408 relative to the rotating drum 407, which determine a high-precision tape bath, are such that the guide stands 416, 417 are pressed against the stoppers 421, 422 fixed to the chassis. It was determined by

In addition, the pinch roller 412 is arranged so that the movement trajectory of the pinch roller 412 and the movement trajectory of the vertical guide roller 409 do not intersect.
The rotation fulcrum of the link mechanism that displaces 12 was arranged.

(Problems to be Solved by the Invention) In this case, the pivot point of the link that displaces the pinch roller is placed closer to the outside of the device, resulting in the disadvantage that the entire magnetic recording/reproducing device becomes wider.

The present invention solves the problems of the prior art, and
The purpose of the present invention is to provide a compact magnetic recording/reproducing device that is also applicable to portable devices.

(Means for Solving the Problems) The present invention provides for a magnetic tape to be drawn out from the inside of the cassette case and wound around the circumferential surface of the rotating drum. at least a pair of guide rollers that are moved along a predetermined guide groove between a first position and a second position near the rotating drum; The pinch roller is movable between a third position outside the pair of guide rollers and a fourth position in contact with the capstan when the pinch roller is moved, and rotation means rotatably supports the pinch roller. The present invention is characterized in that the position of the center of rotation of the rotation means for rotatably supporting the pinch roller is set such that the movement locus of the pinch roller intersects the movement locus of the guide roller.

(Operation) During the loading of the magnetic tape, the movement locus of the pinch roller intersects the movement locus of the guide roller.

(Embodiments) Hereinafter, embodiments of the magnetic recording and reproducing apparatus according to the present invention will be described with reference to the drawings.

FIGS. 12(a) to 12(d) are top perspective views of the tape cassette in the apparatus of the present invention, top perspective views with the front lid open;
A bottom perspective view and a bottom view when the slider and front cover are respectively slid and rotated are shown. tape cassette 20
0 includes a supply reel and a take-up reel (not shown) for winding the tape T, and has a width W of 7311IIm and a depth d.
A front cover 204 is rotatably mounted on the front surface of the cassette body 201 with a height h of 54 mm+ and a height h of 10.511III+ using pins 202 and 203.

Further, a slider 205 is arranged on the bottom surface of the cassette body 201 so as to be slidable in the direction of the arrow A-B.
7 and the hub insertion hole 208 provided in the cassette body 201
．． The positions of 209 match, and the reel shaft (described later) is aligned with the hole 206.
．． 207 and hub insertion holes 208 and 209 to engage the hubs 221222 of the supply and take-up reels. Here, the slider 205 is biased in the direction of arrow B by a spring (not shown), and the slider lock mechanism 210.2
11, the position is locked at each end of movement in the direction of arrow AB.

In FIG. 12(d), a front cover 204. The opening 212 covered by the slider 205 is exposed to the outside when the slider 205 is slid in the direction of arrow A and the front cover 204 is rotated. At this time, the tape T is positioned with its magnetic surface facing outside and the base surface, which is the back surface of the tape T, facing the opening 212. The outer shape of the opening 212 has a width W of approximately 45 mm;
The height H is approximately 8.5 nu++.

When the tape cassette 200 is brought from the cassette ejection position to the cassette operation position by a required cassette loading mechanism, a guide roller, a pinch roller, etc., which will be described later, are inserted into the opening 212, and these are positioned on the tape base side. do.

In FIG. 1, reference numeral 110 is a rotating drum having a magnetic head, and on both left and right sides of the drum 110 are inclined blocks 113 for winding the tape around the drum 110 at a predetermined angle.
．． 114 is fixed to a chassis (not shown), and stoppers 111 and 112 are provided diagonally on the sides of each inclined block 113 and 114 for positioning a guide stand, which will be described later.
is fixed.

Here, the inclined block 113 disposed downstream of the rotating drum 110 will be described in detail with reference to FIG. 13.

In the tape running path, on the front surface of the inclined block 113 disposed between the rotating drum 110 and the guide roller 54, a first tape guide section 3 is provided along the tape running path.
01. A second tape guide section 302 and a third tape guide section 303 are integrally formed. 1st. The second tape guide portions 301 and 302 are formed as semi-cylindrical protrusions that are oriented so as to be inclined relative to the chassis when the inclined block 113 is fixedly arranged relative to the chassis. The third tape guide portion 303 is formed as a semi-cylindrical protrusion that is oriented perpendicular to the chassis when the inclined block 113 is fixedly arranged relative to the chassis.

Therefore, the edges and surfaces of the tape T guided from the obliquely installed rotating drum 110 are moved from non-parallel and non-perpendicular states to the chassis, respectively, to the first and second tape guide portions 301.
, 302, they are returned parallel and perpendicular, respectively. Furthermore, since the third tape guide section 303 is vertically oriented, even if the position of the guide roller 54 (described later) on the chassis surface changes, the tape winding angle around the second tape guide section 302 changes. prevent this from happening.

A first edge regulating member 304 having a first edge regulating surface 306 on the lower surface is provided on the upper part of the inclined block 113 so as to be slidable with respect to the inclined block 113 in the direction of arrow CD in the figure. A screw 308 is provided at the top of the edge regulating member 304, and by rotating this screw 308, the edge regulating surface 306 can be moved along the direction of arrow C-D while keeping it parallel to the chassis. This makes it possible to adjust the running of the tape T in the width direction.

Further, on the upstream side of the first tape guide section 301, a second edge regulating member 305 protrudes facing the chassis. Here, the distance between the second edge regulating surface 307 provided on the lower surface of the edge regulating member 305 and the chassis is made larger than the distance between the first edge regulating surface 306 and the chassis.

Therefore, during normal tape running, the edge of the tape T contacts the first edge regulating surface 306 but does not contact the second edge regulating surface 307. However, if the tape running becomes abnormal and the tape T comes off the first edge regulating surface 306, the second edge regulating surface 307
controls the edge of the tape T to prevent the tape T from coming off the inclined block 113.

A concave relief part 309 having a curvature between the outer peripheral surface of the rotating drum 110 and the path is formed on the back surface of the inclined block 113, so that the upper surface shape of the inclined block 113 becomes wedge-shaped, and the tape T is attached to the rotating drum 110. It is arranged so as to match the space that results from being separated from the center. This relief part 309 is formed on the back surface corresponding to the range from the first tape guide part 301 to the second edge regulating member 305, and is formed on the back surface corresponding to the range from the first tape guide part 301 to the second edge regulating member 305.
10 can be placed close to each other.

Incidentally, the structure of the inclined block 114 disposed upstream of the rotating drum 110 is similar to that of the inclined block 113 except that the inclinations of the first and second tape guide sections with respect to the chassis are opposite to those of the inclined block 113. It is almost the same as.

At the bottom of FIG. 1 there is shown a supply reel rower 10 having reel shafts 151 and 152 for engaging the reels of the tape cassette.
1 and a take-up reel rotor 102 are arranged on the left and right. A guide lever 57 is attached to the shaft 5 on the right side of the rotor 102.
Similarly, on the left side of the rotor 101, a guide lever 69 is supported so as to be rotatable about a shaft 73. Each guide lever 57, 69 has a sickle shape, and a guide roller 62, 70 is attached to the tip thereof, and a connecting pin 59, 72 is fixed to the side of the proximal end.

The guide lever 57 is biased to rotate clockwise by a spring 60 hooked between it and a fixed spring hook 61, and the guide lever 69 is biased to rotate counterclockwise by a spring 74 hooked between it and the chassis. ing.

A tape loading lever 50.63 is arranged so as to partially overlap each lever 57.69. Each loading lever 50.63 has a respective outer shaft 15
．． 12, with their distal ends facing inward, and each having an abutment surface 84.
71. Connecting pins 59.72 of guide levers 57.69 abut against these contact surfaces 84.71, respectively, by the spring biasing force of the levers 57.69. A fulcrum pin 51 is attached to the tip of each loading lever 50.63.
．． Connecting plates 52, 65 are pivotally connected by 64. The coupling plate 52.64 is further pivoted to the tape guide stand 55.68 by means of a fulcrum pin 53.66.

Each guide stand 55, 68 has a vertical guide roller 54, 6
7. Further, a guide pin 160 whose tape contact surface does not rotate is arranged in the chassis below the stopper 112.

In FIGS. 7 and 8, the guide stand 68 is connected to the chassis 4.
5 and a guide board 117 which is fixed at a predetermined interval on the chassis 45 and has a generally square square shape. As shown in FIG. 4, the guide substrate 117 is formed with a substantially circular hole 119 and a guide groove 118 extending from the hole 119 in a figure 7 shape to both sides of the rotating drum 110. The guide stand 68 is inserted through the hole 119, and the base of the guide roller 67 and the fulcrum pin 66
The head of the guide member 68 fits into the guide groove 118, and the guide stand 68 can move along the guide groove 118 toward the stopper 112. Each loading lever 50.63
are arranged between the guide board 117 and the chassis, and each of the guide levers 57 and 69 is arranged above the guide board 117. An inclined surface 87 is formed at the top end of the guide stand 68, and an appropriate number of sliding contact portions 86 are protruded from the lower side of the guide stand 68. The stopper 112 for positioning the guide stand 68 has an inverted vertical cross-sectional shape, has a 7-shaped receiver against which the base of the guide roller 67 comes into contact, and has an adjusting screw 88 vertically shaped. It is screwed in the direction. The adjustment screw 88 passes through the groove of the guide board 117 and attaches to the guide base 6.
8 and presses the guide stand 68 against the chassis 45. The verticality of the guide roller 67 is determined by the relationship between the contact position between the adjustment screw 88 and the inclined surface 87 and the contact position between the base of the guide roller 67 and the 7-shaped receiver of the stopper 112. It's decided. Therefore, the adjustment screw 88
By adjusting , the verticality of the guide roller 67 can be adjusted.

In the illustrated example, there are four sliding contact parts 86 of the guide stand 68 with respect to the chassis 45, but stability is better if there are three sliding parts 86. The structure of the guide stand and stopper on the tape supply side has been described above, but the guide stand 55 and stopper 111 on the winding side also have the same structure.

In this way, a decrease in the strength of the chassis 45 can be avoided by forming the guide grooves 118 on the guide substrate 117 fixed to the chassis 45 instead of forming the guide grooves for guiding the guide stand directly on the chassis. Can be done.

In FIGS. 1 and 2, the loading lever 5
0.63, the main rotating lever 6 is arranged in the left-right direction. The main rotating lever 6 is rotatably provided around a shaft 5 at the center in the left-right direction, and a solid-liquid pin 7 located relatively close to the shaft 5 fits into the groove 3 of the rotating cam 2. There is. A tension spring 17 is applied between the right end of the main rotating lever 6 and a pin 16 placed near the center of rotation of the loading lever 50, and this urging force causes the pin 16 to move toward the upper side of the lever 6. When the lever 6 rotates clockwise, this rotational force is transmitted to the lever 50 via the spring 17, and the lever 50 follows and rotates clockwise. Similarly, a tension spring 14 is applied between the left end of the lever 6 and the pin 13, which is solid-liquid near the center of rotation of the lever 63.
When the lever 6 rotates clockwise, this rotational force is transmitted to the lever 63 via the spring 14, and the lever 63 follows the lever 6 and rotates counterclockwise. Rotate.

In FIGS. 2, 3, and 5, the rotating cam 2 is provided integrally with the rotating shaft 1, and has two spiral cam grooves 3 and 4 on its upper surface. On the other hand, the cam groove 3 has a portion on the outer circumferential side where the diameter does not change within a relatively small angle θ, a portion where the diameter continuously decreases, and a portion where the diameter does not change over the angle α. The other cam a4 consists of a portion having the same diameter from the center of rotation over an angle β of nearly 180 degrees, a portion having a successively smaller diameter, and a portion having an unchanged diameter. The rotary cam 2 is rotationally driven by a motor 20. As shown in FIG. 2, the rotational force of the motor 20 is transmitted to the worm 23 via the belt 22 and pulley 21, and the rotational force of the worm 23 is transmitted to the cam 2 via the worm wheel 24 and reduction gear 25. .

In FIGS. 1 and 2, a pin 9 solid-liquid is fitted into the cam groove 4 of the cam 2 at the end of one arm of the pinch roller pressure lever 8. As shown in FIGS. The lever 8 has three arms, the end of one of which is pivotally connected to one end of the release lever 18 by a connecting pin 10. A bent portion 8 is provided at the other arm end of the lever 8.
3 is formed.

The release lever 18 passes in the vicinity of the rotating drum 110 in the left-right direction, and a pin 19 is fixed to the left end of the lever 18. The pin 19 faces a bent edge of an example of the tension lever 27. As shown in FIG. 6, the tension lever 27 is rotatably provided around a shaft 41, and is rotated by a spring 42 in a direction (counterclockwise in FIG. 6) so that the bent edge comes into contact with the pin 19. It is dynamically energized. A plurality of holes 43 on the chassis side for hanging the spring 42 are formed, and by selecting and using one of them, the biasing force of the lever 27 can be adjusted. A tension roller 46 is provided at the tip of the lever 27. By rotating the lever 27 in the biasing direction, the roller 46 advances into the tape path.

The lever 27 has a vertical notch edge 48, and a sensor 47 is fixed at a position overlapping the notch edge 48.

The sensor 47 is, for example, an optical sensor, and the lever 27
Detects the rotational position of the

In FIGS. 1 and 4, there is a shaft 76 on the tape winding side.
The pinch roller pressure bonding plate 78 and the pinch roller lever 8
2 is rotatably supported. Pinch roller lever 8
2 has a pinch roller 75 at its tip, and is urged to rotate counterclockwise by a spring 80 hooked between it and a fixed spring hook 81. When the lever 82 rotates about the shaft 76 against the force, the pinch roller 75 comes into pressure contact with the capstan 115. Here, as will be described later, the position of the shaft 76 of the pinch roller lever 82 is determined so that the locus of movement of the pinch roller 75 intersects the locus of movement of the guide roller 54, 67 near the intermediate position of the movement. A tension spring 79 is applied between the lever 82 and the pinch roller crimping plate 78 approximately in the middle of the pinch roller 75 and the shaft 76, and urges the crimping plate 78 counterclockwise with respect to the lever 82. An engaging piece 77 is formed by bending at the tip of the crimp plate 78, and when the engaging piece 77 comes into contact with the side edge of the lever 82 due to the biasing force of the spring 79, the lever 82 and the crimp plate 78 are brought together. The pinch roller crimping pin 11 is fixed on the lower surface of the crimping plate 78.The crimping plate 78 is attached to the fourth
When rotated clockwise as shown in the figure, the crimp pin 11 is located on the side of the contact surface 83 of the pinch roller crimp lever 8. Further, the pin 11 is connected to the loading lever 50.
It is located in the passage of the pressing part 56 which is provided in a protruding manner.

Here, when the tape cassette 200 is installed at the tape unloading position in FIG.
As shown in Figure (d), the guide rollers 70, 67, 54
．． Pinch roller 75. Guide rollers 62 are arranged in each opening 21 of the tape cassette 200 in order from the right side in the figure.

3 and 5, a brake recess 1 is formed by cutting out a portion 92 of a constant diameter on the outer periphery of the rotary cam 2.
04 is formed. A brake operating lever 90 is provided near the cam 2 and is rotatable about a shaft 91 and biased to rotate counterclockwise by a lever spring 103 . One arm end of the lever 90 slides against the outer circumferential surface of the cam 2, and rotation in the biasing direction is restricted. On the other hand, in the vicinity of the supply side reel rotor 101 and the take-up side reel rotor 102, there is a brake lever 98. It is rotatable around the center.

A tension spring 100 is applied between both levers 98, 95, and each brake piece 97, 94 is connected to each rotor 101, 1.
It is rotationally biased in a direction to press against the outer circumferential surface of 02. The other arm end 93 of the brake operation lever 90 is connected to the lever 9
It extends toward the brake piece 94 of No. 5, and
As shown in the figure, when one arm end of the lever 90 is in sliding contact with the constant diameter portion 92 of the cam 2, the arm end 93 pushes the brake piece 94 and rotates the lever 95 against the urging force. The brake piece 94 is spaced apart from the reel rotor 102. The two brake levers 95 and 98 are connected by contacting protrusions, and when the lever 95 is rotated counterclockwise as described above, the lever 98 is rotated clockwise, and the brake piece 97 is connected to the reel rotor 101. Separate from. As shown in FIG. 5, when the cam 2 rotates and one arm end of the lever 90 falls into the recess 104 of the cam 2, the lever 90 rotates in the biasing direction and the other arm end 93 escapes from the brake piece 94. , lever 9
5 rotates clockwise and lever 98 rotates counterclockwise, each brake piece 94.97 comes into pressure contact with the outer peripheral surface of each reel rotor 101, 102 to apply the brake.

In FIGS. 10 and 11, a bottle 34 is also disposed on the lower surface of the rotating cam 2. As shown in FIGS. One end of the intermediate lever 33 is located above the passage of the bottle 34. The lever 33 is attached to a support plate 28 fixed to the chassis by columns 29, 30, 31.
It is rotatably supported around the above-mentioned pillar 30 as an axis. A pin 35 is solid-liquid at the other end of the lever 33, and this pin 3
5 fits into a fork portion at one end of a connecting lever 36 that is rotatable about a shaft 37. The other end of the connecting lever 36 is connected to an eject lever 39 via a pin 38. When the rotary cam 2 rotates clockwise in FIG. 10, the pin 34 rotates the intermediary lever 33 counterclockwise, the connecting lever 36 clockwise, and the eject lever 39 is moved upward in FIG. move it to

This releases the positioning of the tape cassette and allows the cassette to be taken out. As shown in Figure 11,
A potentiometer 32 is provided integrally with the shaft 1 of the rotating cam 2. This is for detecting the rotational position of the rotary cam 2 and controlling the rotational position of the cam 2, and may be replaced by a rotary encoder or the like.

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

FIG. 1 shows the state in which the cassette is removed, ie, before tape loading. The rotational position of the rotary cam 2 at this time is as shown in FIG. 2, and each pin 7.9 is located at the large diameter portion of each cam groove 3, 4.

Further, as shown in FIG. 3, the brake operation lever 90 is rotated by the outer circumferential surface of the cam 2 against the urging force, and the brake levers 95 and 98 are forcibly rotated so that the brake lever 90 is rotated against the reel rotors 101 and 102. The brake force is released.

When the tape cassette 200 is loaded, a necessary mechanism causes the tape cassette 200 to move onto its slider 205. Front lid 20
4 are respectively slid and rotated to the state shown in FIG. 12(d), and the guide rollers 70, 67, 54. Pinch roller 75. The guide roller 62 is inserted in a straight line into the opening 212 of the tape cassette 200 and positioned on the base side of the tape T. The distance between the axes of the guide rollers 54° and 67 is now approximately 11 mm. From this state, the second
The motor 20 shown in the figure is driven, and the rotary cam 2 is rotationally driven in a counterclockwise direction via the speed reduction mechanism. Since the diameter of the cam groove 4 into which the bottle 9 fits does not change within the initial rotational angle range of the cam 2, the pinch roller pressure lever 8 does not rotate. On the other hand, since the diameter of the cam groove 3 into which the pin 7 fits gradually decreases toward the center from the beginning of the rotation of the cam 2, the pin 7 fits into the shaft 1.
This causes the main pivot lever 6 to rotate clockwise in FIG. Since the distance from the shaft 5 of the lever 6 to the bin 7 is short with respect to the entire length of the lever 6, the movement stroke of both left and right ends of the lever 6 is quite large. When the lever 6 rotates, the rotational force is transmitted to the loading lever 50 via the spring 17, and is also transmitted to the loading lever 63 via the spring 14, and the lever 50 moves clockwise following the lever 6. The lever 63 rotates counterclockwise. The rotation of the levers 50 and 630 pushes the guide bases 55 and 68 through the connecting plates 52 and 65,
These guide stands 55, 68 are moved toward the stoppers 111, 112 while being guided by the guide grooves 118.

On the other hand, due to the rotation of each lever 50.63, each lever 5
The contact surface 84.71 of 0.63 mm escapes from the pin 59.72, and each guide lever 57.69 is biased by the lever 50.
63 and rotate clockwise and counterclockwise, respectively. The tape is pulled out from the cassette by the movement of the guide roller 62.70 due to the rotation of this lever 57.69 and the movement of the guide roller 54.67 of the guide stand 55.68.

Next, the moving operation of the pinch roller 75 is shown in FIG.
This will be explained in detail using b). When the loading lever 50 is rotated by a predetermined angle, the pressing portion 56 of the loading lever 50 is pressed against the pinch roller pressure bonding plate 7.
8 and presses the pin 11 to rotate the crimp plate 78 clockwise. Due to this rotation of the pressure bonding plate 78, the pinch roller lever 82 rotates clockwise following the pressure bonding plate 78 due to the biasing force of the spring 79, and the pinch roller 75 moves along its movement locus 133, and the capstan 11
5 toward the position shown by the two-dot chain line. Similarly, the axis 131 of the pinch roller 75 moves along its movement locus 132. During this move,
The pinch roller 75 intersects with the movement locus 134 of the guide roller 54 as shown by the solid line, but the pinch roller 75
is configured to be moved by pushing the pin 11 after the pressing portion 56 of the loading lever 50 has rotated a required amount from the unloading position. Therefore, when the pinch roller 75 is located on the moving parent control 34 of the guide roller 54, the guide roller 54 is already at a position further moved than this position, so that they do not influence each other. Further, since the guide substrate 117 is not provided on the movement trajectory of the pin 11, it does not prevent the pin 11 from coming into contact with the pressing portion 56. Pin 1 of lever 82 as shown in FIG.
1 is located on the side of the bent portion 83 of the pinch roller pressure lever 8.

In this way, as shown in FIG.
The tape between the rollers 54 and 67 is wound around the outer peripheral surface of the rotating drum 110 by about 90 degrees, and the guide rollers 62 and 70 are moved until they come into contact with the rotating drum 11.
0 to guide the tape along a predetermined path. Here, after the tape guide stand 55.68 comes into contact with the stoppers 111, 112, the main rotation lever 6 is further rotated, and the springs 17.14 are stretched, so that the guide stand 55.68 It is pressed against the stoppers 111 and 112 by the biasing force of the springs 17 and 14.

On the other hand, the pinch roller 75 is moved close to the capstan 115 by the pressing portion 56 protruding from the loading lever 50, but is still separated from the capstan 115.

The state shown in FIG. 4 is the stop position, and the rotary cam 2 rotates approximately half a turn, and as shown in FIG.
4, one arm end of the lever 90 drops to apply the brakes to the left and right reel rotors 101 and 102 as previously explained.

The rotating cam 2 further rotates counterclockwise from the position shown in FIG. Due to this rotation of the cam 2, the pin 7 enters the same radius area α of the cam groove 3, so the main rotating lever 6 does not rotate from the position shown in FIG.
70 does not move from the position shown in FIG. On the other hand, since the pin 9 enters the portion of the cam groove 4 whose diameter is gradually reduced, the pinch roller crimping lever 8 is rotated clockwise as shown in FIG.
The tape is transferred at a constant speed by being brought into pressure contact with the capstan 11
In the process of pressing the pinch roller 75 against the guide stand 5
Since the angle 5°68 does not move, the pressing force of the guide rollers 54, 67 against the stopper 11L112 remains unchanged. Further, due to the rotation of the cam 2, the brake operation lever 90 is pushed by the same radial surface 92 of the cam 2 and rotated clockwise in FIG. 5, and the brake on the reel rotor 101, 102 is released.

In this way, the play state as shown in FIG. 6 is achieved. Then, by rotating the lever 8 clockwise, the lever 18
is moved to the right and its pin 19 escapes from the tension lever 27. The tension lever 27 is rotated counterclockwise in FIG. 6 by the biasing force of the spring, and the tension roller 46 is pressed with a predetermined pressure against the tape T stretched between the guide roller 70 and the guide roller 19. The rotational position of the lever 27 depends on the tension of the tape T. Therefore, the rotational position of the lever 27 is detected by the sensor 47, and this detection signal is input to the tension control device to control the tape tension to be constant. As the tension control device, an appropriate device may be adopted, such as a method of controlling the rotational speed of the supply reel motor or electromagnetically controlling the braking force of the supply reel.

In the above-mentioned play state, the tape T is unwound from the supply reel of the tape cassette 200, and the tape T is unwound from the supply reel of the tape cassette 200, and the tape T is sequentially unwound from the guide roller 70. Tension roller 46. Guide pin 119. Guide roller 67, tilting block 1141 rotating drum 110
．． I diagonal block 113. Guide roller 54. Capstan 115 and pinch roller 75. It passes through a guide roller 67 and is wound onto a take-up reel.

Here, the inclined block 114 makes the edges and surfaces of the tape running parallel and perpendicular to the chassis non-parallel and non-perpendicular, respectively, and then wraps the tape around the rotating drum 110, and the inclined block 113 wraps the tape around the rotating drum 110. It has the opposite effect.

Next, a high-speed search for transporting the tape to a desired position at high speed will be explained. For high-speed search, rotate cam 2
is rotated slightly clockwise from the position shown in FIG. 5, in other words, at a position before reaching the stop position shown in FIG. 5 in the tape loading operation described above. In this position, the lever 90 is connected to the reel rotor 101,
Although the brake for 102 is released and the main pivot lever 64 is rotated slightly counterclockwise, the springs 14 and 17 are still stretched, so the guide base 55° 68 moves the spring 14 Stopper 1 due to the biasing force of .17
11 and 112. Also pinch roller 75
is separated from the capstan 115, so if the reel is rotated at high speed in this state, the tape can be transported at high speed, and by reproducing the signals recorded on the tape with the rotating drum 110, the tape can be moved to the desired position. can be transported.

Next, assuming that the above-mentioned high-speed search is, for example, a 200 times search, a description will be given of an ultra-high speed search that is even faster than this, such as a 400 times search.

In the case of an ultra-high speed search, the rotary cam 2 is stopped at a position midway through the tape loading operation described above, resulting in a state as shown in FIG. In the state shown in FIG. 9, each guide roller 54.
67, 62, 70 and pinch roller 75 are in the middle of a predetermined travel stroke and the tape has not yet contacted rotating drum 110. Therefore, the load on the tape transport system is light, and if the reel is rotated at an extremely high speed in this state, the tape can be transported at an extremely high speed. Therefore, the tape transfer amount is counted by means such as adding the number of rotations of the reel drive motor or counting the number of rotations of the reel, and when the desired amount of transfer is reached, the transfer is stopped. In this ultra-high-speed search, the tape is not in contact with the rotating drum 110, so the magnetic head cannot pick up the signal from the tape T, and it is not possible to determine the exact tape position based on this signal. Find the exact tape position using the high-speed search described above.

As mentioned above, there are various operation modes, but each time each operation mode ends, the rotating cam 2 is returned to the stop position as shown in FIG. 5, and the reel rotors 101 and 102 are braked to loosen the tape. prevent.

Next, the eject operation will be explained. When the eject button is pressed, the rotating cam 2 is driven to rotate in the opposite direction.
Each part returns to its original position as shown in FIG. 1 by the reverse operation of the tape loading described above. That is, first, the pinch roller 75 separates from the capstan 115, then the guide roller 54.67 separates from the stopper 111.112 and returns to its original position, and the guide roller 62.70 returns to its original position. On the other hand, the rotary cam 2 further rotates clockwise from the original position as shown in FIG. 2 within a range indicated by an angle θ. Within the range of the angle θ, the radii of the cam grooves 3 and 4 do not change, and the guide rollers, pinch rollers, etc. do not move from their original positions in FIG. However, when the cam 2 rotates within the angle range of θ, the pin 34 rotates the intermediary lever 33 counterclockwise as shown in FIG.
clockwise to move the release lever 39 upward in FIG. This movement of the lever 39 releases the restraint and positioning of the tape cassette, and the tape cassette is ejected. After the cassette is jetted, the cam 2 returns to its original position as shown in FIG.

At each operating position, the rotating cam 2 must be stopped at a predetermined rotational position, and the stopping position of the cam 2 can be detected by the output of the potentiometer 32 shown in FIG.

According to the embodiment described above, the main rotating lever 6 is rotated by one cam, the tape loading lever 50.63 is rotated following the rotation of this lever 6, and this loading lever 50.63 is rotated by one cam. Since the tape guide stands 55 and 68 are moved by the rotation drum, there is no need to provide a ring gear around the outer circumference of the rotating drum, and the bulk around the rotating drum can be eliminated. In addition, since it is a combination of levers, the mechanism is simple, the number of parts is small, there is little friction loss, and a large movement stroke can be obtained.

In particular, when the members for diagonally guiding the tape with respect to the rotating drum 110 are fixed inclined blocks 113 and 114 as in the illustrated embodiment, the guide rollers 54 and 6
Although the guide rollers 54 and 67 require a larger movement stroke than the case where the inclined ball moves integrally with the guide roller 5, a sufficient movement stroke can be obtained by combining the levers as described above. There is no equivalent problem if more travel strokes are required.

Each cam groove 3.4 of the rotary cam 2 is designed to move the main rotating lever 6, lever 8, and the parts connected to these in the smaller diameter part than in the large diameter part, so that a larger drive force can be achieved. You can gain power. In addition, since the cam groove of cam 2 has a groove for moving the guide roller and a groove for moving the pinch roller separately, when the pinch roller is pressed against the capstan, the pressing force of the guide roller against the stopper may fluctuate. Therefore, stable contact force can be obtained.

Furthermore, the present invention is not limited to the above-described embodiments.

For example, in the above embodiment the slope 7'.

Tsuku set the scanning trajectory of the head to a predetermined inclination angle, but
The present invention is not limited thereto, and may be applied to a magnetic recording/reproducing device configured with a conventional pull-out means consisting of an inclined pin and a vertical guide roller. Of course it is possible.

(Effects of the Invention) According to the present invention, mutual contact is avoided by moving either the vertical guide roller or the pinch roller in advance during tape loading, and the pinch roller configured with the rotary link is By intersecting the rotation trajectory of the roller with the movement trajectory of the vertical guide roller, it is possible to place the rotation fulcrum of the link that displaces the pinch roller closer to the center of the device, making it possible to provide a compact magnetic recording and reproducing device. .

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the magnetic recording/reproducing device according to the present invention, Fig. 2 is a plan view of the peripheral portion of the rotating cam in the above embodiment, and Fig. 3 is a brake mechanism part in the above embodiment. FIG. 4 is a plan view showing the tape loading operation of the above embodiment, FIG. 5 is a plan view showing different operating modes of the brake mechanism portion, and FIG. 6 is a plan view showing the play operation of the above embodiment. 7 is a vertical sectional view showing the tape guide stand in the above embodiment, FIG. 8 is a bottom view of the same guide stand, and FIG. 9 is a plan view showing the ultra-high speed search mode of the above embodiment. 10 is a plan view showing the eject mechanism portion in the above embodiment, FIG. 11 is a longitudinal sectional view of the same, and FIG. 12 (
a) to (d) are respectively a top perspective view, a top perspective view with the front lid open, and a bottom perspective view of the tape cassette used in the device of the present invention, and the bottom view when the slider and front lid slide and rotate, respectively. Figure 13 is a perspective view of the inclined block, the first
4(a) and 4(b) are a plan view and a sectional view of essential parts, respectively, for explaining the movement of the pinch roller, and FIG. 15 is a plan view showing an example of a conventional magnetic recording/reproducing device. 2. Rotating cam, 6. Main rotating lever, 14.17
・・Spring member, 20・・Motor, 50.63 ・
・Chief loading lever, 55.68 ・・Tape guide stand, 54.62, 67.70 ・・Guide roller, 75・
- Pinch roller, 113.114... Inclined block, 118... Guide groove, 200... Tape cassette, 309... Relief part. To pcn I-”qgn-

Claims (1)

[Claims] A magnetic tape stored in a cassette case is pulled out and wrapped around the circumferential surface of a rotating drum having a head at a predetermined wrap angle, and the magnetic tape is transported by cooperation of a capstan and a pinch roller. In a magnetic recording and reproducing apparatus for recording and reproducing information, each magnetic tape is located on the back side of the magnetic tape facing outside from an opening of the cassette case in order to pull out the magnetic tape from inside the cassette case and wrap it around the circumferential surface of the rotating drum. at least a pair of guide rollers that are moved along predetermined guide grooves between a first position and a second position near the rotating drum; The pinch roller is movable between a third position outside the pair of guide rollers when the pinch roller is in position and a fourth position where the pinch roller is in contact with the capstan, and the pinch roller is rotatable. What is claimed is: 1. A magnetic recording and reproducing apparatus, comprising: a rotating means that is supported by a shaft, and a center of rotation of the rotating means is set such that a movement locus of the pinch roller intersects a movement locus of the guide roller.