JPS6010383B2 - magnetic recording and reproducing device - Google Patents

Description

[Detailed description of the invention]

The present invention enables the magnetic tape stored in the cassette of the reel-reel to be transferred from the closing part provided at the front end of the cassette.
The present invention relates to a magnetic recording and reproducing device capable of recording or reproducing audio signals, etc. by pulling the cassette out of the cassette and bringing it into contact with a magnetic head provided outside the cassette. An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 1, 1 is a board of the apparatus, and 2 is a cassette. The cassette 2 is mounted at a predetermined position on the substrate 1 by fixing reference pins 3, 3' implanted in the substrate 1 into holes 2a, 2b provided in the cassette 2. Reference numerals 4 and 4' denote hubs housed in the cassette 2, in which a magnetic tape 5 is wound. The front end of the cassette 2 is provided with notches 6, 6' extending over its upper and lower surfaces.Furthermore, the front end of the cassette 2 has a lid 7 that can be rolled over to cover the front end of the entrance of the notches 6, 6'. 7' is provided, and the lids 7, 7' are always kept in a closed state by a spring bias.
It is possible to open against the biasing force of the spring using the spring as a fulcrum. A head substrate 8 is attached to a position of the substrate 1 facing the front end of the cassette 2 by screwing a head substrate mounting rod 95 provided with a substrate support.
An erasing head 9, a cue head 18, and a recording head 12 are attached to the head 12, and tape guide rods 9 and T9' are respectively provided on the upstream and downstream sides of the magnetic tape 5 of each head. A button holder 14 is provided on the board 1, and the button shaft 4a of the button holder 14 has rotating operation buttons such as the play button wing 5, the pause button 16, and the record button 17. 22 is a stop button. 127G is a fast forward or rewind operating lever.
Further, reference numeral 19 is a loading knob, and the details of the operation thereof will be described later. When the cassette 2 is installed, a pinch roller 20 is inserted into the notch 6', and a tension detection roller 21 is provided in the notch 6. The reference numeral 3 is a capstan that is the rotation axis of the capstan motor 166. FIG. 2 is a top view showing the arrangement of the mechanical parts with the cassette 2, head block, and pushbuttons removed. Only the main parts will be explained here, and details will be given in the explanation of each mode later. I will explain later. Reel stands 23 and 23' have the same configuration, and as shown in FIG. 8, one of the reel stands is mounted on the base plate 1 via a boss 24 and is rotatable on a reel shaft 25. A main rotating body 26 supported by the main rotating body 26 is provided, and an upper stopper 27 and a lower stopper 28 are press-fitted into the upper and lower ends of the main rotating body 26. Around the upper stopper 27, there is a claw 2 that can be freely moved up and down.
9 is provided, and the inner circumference of this pawl 23 and the main rotating body 26
The mating part with the hexagonal hole is joined with the claw 29, and the main rotating body 26
It is designed to rotate in unison with the Also, nail 29
A spring 30 is interposed between the main rotating body 26 and the pawl 2.
9 is always urged upward by a spring 30. A drive wheel 31 is rotatably supported at the lower part of the main rotating body 26, and a felt 32 is attached to the upper surface of the drive wheel 3. A compression spring 33 is interposed between the drive mechanism 31 and the lower stopper 2 fin, and the rotational force transmitted from the Hydra 34 to the drive wheel 3 is transmitted to the main rotating body 26 by the frictional force of the felt 32. This is a cap to prevent the reel stand from slipping out of the reel bag.As shown in Figure 2, 36 and 36' are brake arms. The brake arms 369 and 36' are rotatable around the support shafts 37 and 3?
Brake shoes 3 and 3 are respectively provided in a part of the brake shoes. Furthermore, a tensioning mechanism 39 is stretched between the corners 36' of the brake arm 36 and is biased so that they are pulled together. As a result, the brake shoes 38S 38' are moved to the reel stand 239 2 by the elastic force of the tension spring 39.
The driving theory of 3' is such that the braking of the reel stands 236 and 23' is performed by the pressure of the 3 rivers. Reel stand 23,2
From the relationship between the position of 3' and the 3rd character of the brake support, 37', ``For the reel stand, the direction of rotation in the direction of arrows A and A' is the rotation direction of the brake, and the rotation in the opposite direction to arrows A and I'. The reference pins 3 and 3' have the same structure, and as shown in FIG. The lower end of the standard support part 40 is screwed to a predetermined part of the board 1.
Alternatively, the cassette receiving portion 41 is caulked.
is fixed to the upper part of the koji part 40, and has a tapered part 42 at its tip for making it easier to insert the cassette 2, and a flange part 43 for determining the height of the cassette 2 at the lower part. Next, the detailed configuration and operation of this device will be explained for each operation mode. First, a description will be given of the tape loading operation for obtaining a standby state in which the magnetic tape 5 stored in the cassette 2 is pulled out of the cassette 2 after the cassette 2 is loaded and playback or recording operations are possible. After installing the cassette 2, as shown by the solid line in Figure 1,
Manually rotate the loading knob 19 in the direction of the arrow in FIG. A loading cam 44 is integrally provided with the loading knob 19, and the loading cam 44 rotates about a shaft 45 supported on the front plate of the substrate 1 as the loading knob 19 rotates. The loading cam 44 is provided with a grooved cam 46 that is part of a spiral, and a cam follower 48 rotatably supported by an operation lock plate 47 is iron-coupled within the grooved cam 46. By rotating the loading cam 44 in the direction of the arrow, the cam follower 48 moves along the outer edge 49 of the grooved cam 46 by the stroke 1 of the grooved cam 46 in the direction of the axis 45. That is, the operation lock plate 47 moves by one stroke in the direction of arrow C. As shown in FIGS. 2 and 6, the operation lock plate 47 is provided so as to be slidable on the board 1 in the direction of arrow C and in the opposite direction with reference to guide shafts 50 and 51 provided on the board 1 as a shield. A portion thereof has an engaging pin 53 that is engaged with the loading lever 52. The loading lever 52 is rotatably provided on the board 1 with a shaft 54 as a fulcrum, and as the operation lock plate 47 moves in the direction of arrow C,
Rotation is performed from the state shown in FIG. 2 to the state shown in FIG. 6, that is, in the opposite direction of the arrow. A pin 55 is provided at the tip of the loading lever 52, and the pin 55 is engaged with an elongated hole 57 of the fan-shaped mechanism 56. The fan-shaped ring 56 is the reference pin 3
The loading lever 52 is rotatably provided around the reference shaft portion 40 as a fulcrum, and by rotating the loading lever 52 in the direction of the arrow, the state shown in FIG. 2 is rotated to the state shown in FIG. . Furthermore, the reference shaft portion 401 is iron-coupled with the elongated hole 58a of the idler arm 58, and the idler arm 58 is rotatable about the shaft portion 40 as a fulcrum and can slide in the two directions shown by the arrows in FIG. It is configured as follows. A tension spring 59 is stretched between one end of the idler arm 58 and the loading lever 52, and a loading idler 60 is attached to the shaft 5 at the end of the idler arm 58.
It is rotatably supported by 8b. The loading idler 60 is operated by the loading knob 1 by the tension spring 59.
It is energized in nine directions and is always in rolling contact with the circumferential side surface 61 of the fan-shaped ring 56, and is configured to rotate in accordance with the rotation of the fan-shaped ring 56. The idler arm 58 is also biased in the direction of the arrow by a tension spring 59 and supported by a pin 62 mounted on the loading lever 52.
As a result, the loading idler 60 is normally in a state separated from the drive wheel 31 of the reel stand 23'. and,. When the loading lever 52 starts rotating in the direction of arrow H in FIG.
The idler arm 58 whose position was restricted by the second pin 62 rotates in the direction of the arrow due to the tension of the pulling spring 59, and the loading idler 60' or the fan-shaped ring 56
It comes into contact with the drive wheel 31 of the reel stand 23' in a state where it is in rolling contact with the reel stand 23'. When the loading lever 52 rotates in the direction of the arrow H, the sector 56 rotates in the opposite direction to the arrow, and the idler 6
0 rotates clockwise and attempts to transmit rotational force in the direction of arrow A' to the reel stand 23'. However, the rotating direction of arrow A' of the reel stand 23' is in the direction of biting into the brake shoe 38', and the reel stand 23' is strongly braked, and the rotating direction of the fan-shaped ring 58 is the same as that of the idler 6.
Since it is the escape direction for 0, idler 60
56 without rotating the reel stand 23'.
Further, when the rotation of the sector 56 approaches its end, the protrusion 63 provided on the sector 56 hits the idler arm 58 and rotates idly while sliding on the circumferential side 61 of the sector 56. The loading idler 60 is rotated in the opposite direction to move the loading idler 60 away from the reel stand 23', and is stopped in the state shown in FIG. Further, a long hole 64a provided in a pinch roller arm drive rod 64 is engaged with the pin 62 of the o-ding lever 52. The end of the pinch roller arm drive rod 64 is connected to a pinch roller drive pin 66 that is mounted on a part of a pinch roller arm 65 that is rotatably supported on a shaft 68 that is mounted on the substrate 1 . Further, a tension spring 67 is stretched between the pin 62 and the pinch roller drive pin 66 to obtain a pressing force for the pinch roller 20. Figure 2,
As shown in FIG. 6, when the loading lever 52 is rotated in the direction not indicated by the arrow, the tension spring 67 is stretched by the pin 62, thereby the pinch roller arm 65 is rotated counterclockwise, and at the same time the pinch roller arm The drive load 64 moves to the left. The rotation of the pinch roller arm 65 is controlled by its drive pin 6.
6 is engaged with a stopper portion 113 of a stop lever 84, which will be described later, and the pinch roller 20 is stopped near the capster 13, resulting in the state shown in FIG. A pinch roller shaft 69 is installed as a shield at one end of the pinch roller arm 65, and the pinch roller shaft 69 is connected to the pinch roller 2.
0 is rotatably supported, and a lid opening/closing claw 70 is integrally provided at one end of the pinch roller arm 65. As the pinch roller arm 66 rotates counterclockwise, the lid opening/closing claw TO opens and closes the lid T of the cassette 2.
' and opens this diamond 7' to the position shown by the two-dot chain line in FIG. On the other hand, a pin 71 is secured to the other end of the pinch roller arm 65, and this pin 71 is engaged with one end of a tension means mounting arm 72. The tensioning means supporting arm 72 is rotatably provided around a shaft 73 mounted on the board 1 as a fulcrum, and is normally urged to rotate in the direction of the arrow (not shown). pin 71
Its rotation is prevented by. Since the pin 71 escapes as the pinch roller arm 65 rotates in the counterclockwise direction, the tension means mounting arm 2 is rotated by the spring force from the state shown in FIG. 2 to the state shown in FIG. 6, that is, in the direction of arrow T. is configured to do so. The rotation of the tension means mounting arm 72 in the direction of arrow T is stopped by a stopper pin 74 on a tension pad release lever 138, which will be described later. A rhombus opening/closing claw 75 is provided at one end of the tensioning means mounting arm 72, and as the tensioning means mounting arm 72 rotates in the direction of the arrow T, the lid opening/closing claw 75 comes into contact with the lid 7 of the cassette 2 and opens the lid 7 of the cassette 2. 1
Open to the position shown by the two-dot chain line in the figure. Furthermore, a tension arm 76 is mounted on the tension means mounting arm 72 between the shaft 73 and the lid opening/closing pawl 75 by means of a support shaft 77 so that it can be rolled around. A shaft 78 is mounted on one end of the tension sorm 76, and the tension detection roller 21 is rotatably supported on the shaft 78. Furthermore, tension arm 7
A felt pad 80 is attached to the magnetic tape 6 for pressing the magnetic tape 6 against the tape guide rod 79 and applying back tension to the magnetic tape 5 when the tape runs during recording and reproduction. The outer circumferential surface of the tension detection roller 21 is positioned forward of the end surface of the felt pad 80 in all directions in which the tension means mounting arm 72 rotates in the direction of arrow T. Furthermore, tension arm 76
A spring-loaded portion 81 is provided on the other end, and a tension arm 76 is provided between this spring-loaded portion 81 and a spring-loaded portion 72a of the tension means mounting arm 72 in order to generate the pressing force of the fettle pad 80. A tension spring 82 that biases clockwise is tensioned. Further, as shown in FIG. 2, the spring hook 81 is in contact with a stopper 83 provided on the tension means mounting arm 72 before the tape is loaded.
The biasing rotation by the tension spring 82 of No. 6 is stopped. The above is the configuration of the tape loading mechanism, and a series of tape lobing operations and unloading operations will now be explained based on these configurations. By rotating the loading knob 19 in the loading direction (in the direction of the arrow in FIG. 7) from the stopped state in FIG. 2, the operation lock plate 47 moves in the direction of the arrow C and the loading lever 52
rotates in the direction of arrow H. Along with this, the idler 60 performs transfer to the reel stand 23', but the reel stand 23'
' is not rotated because it is braked, and further, by rotation of the loading lever 52, the idler 6 is separated from the reel stand 23' and stopped in that separated state. On the other hand, as the loading lever 52 rotates, the pinch roller arm 65 rotates counterclockwise, and the lid opening/closing claw 70 of the pinch roller arm 65 rotates counterclockwise.
1, the diamond 7' of the cassette 2 is opened, and at the same time the magnetic tape 5 is pulled out to a predetermined position by the pinch roller 20 located in the notch 6' of the cassette 2. At this time, although the reel stand 23' is braked, the magnetic tape is pulled out by rotating the main rotary body 26 against the frictional force of the pressing portion of the felt 32 shown in FIG. When the pinch roller arm 65 rotates to the front of the capstan 13, the pinch roller drive pin 66 moves to the third position.
Rotation is stopped by supporting the stopper portion 113 of the stop lever 84 shown in the figure. Also, pinch roller arm 6
5, the tensioning means mounting arm is rotated in the direction of arrow T, and the lid opening/closing claw 75 opens the lid 7 of the cassette 2.
is opened, the tension detection roller 21 comes into contact with the magnetic tape 5, the magnetic tape 5 is pulled out of the cassette 2 against the frictional force of the felt 32 of the reel stand 23', and the tension means mounting arm 72 At the final rotation position, the magnetic tape 5 contacts the tape guide rod 79, and then the felt pad 80 contacts the magnetic tape 5, and the felt pad 801 causes the magnetic tape 5 to come into contact with the tape guide rod 79.
is pressed against the tape guide bar 79. As a result, the pulled-out magnetic tape 5 is brought into reliable contact with each of the heads 9 to 12, and becomes ready for recording or reproduction. The above is the tape loading operation, in which the magnetic tape 5 is pulled out from the state shown by the solid line in FIG. 1 to the state shown by the two-dot chain line. Next, the tape unloading operation is performed by rotating the loading knob 19 in the direction opposite to the arrow in FIG. 7 from the tape loaded state. That is, by rotating the loading knob 19 in the direction opposite to the direction indicated by the arrow, the pinch roller 20, tension detection roller 21, etc. are housed again in the notches 6, 6' of the cassette 2, and the lids 7, 7' are opened again. It closes due to the return force of. In this unloading operation, the magnetic tape 5 pulled out of the cassette 2 in the loading operation is wound up by the reel stand 23'. Therefore, this operation will be explained next. That is, during unloading, the loading lever 52 is rotated in the direction opposite to the arrow in FIG. 2, and therefore the fan-shaped ring 56 is also rotated in the opposite direction to the arrow. As a result, the loading idler 60 comes into contact with the fan-shaped roller 56 and the reel stand 23', and the loading idler 60 rotates counterclockwise, and this rotation brings it into a biting state with respect to the reel stand 23'. Narutare reel stand 23
′ transmits rotational force in the opposite direction to arrow A′. This rotation of the reel stand 23' in the direction opposite to the arrow A' is a direction of escape for the brake shoe 38', so the reel stand 23' rotates by a predetermined amount in the direction opposite to the arrow A'. The magnetic tape 5 drawn out from the cassette 2 is wound onto the reel hub 4', the magnetic tape 5 is wound onto the reel hub 4', and the magnetic tape 5 is completely housed in the cassette 2. In this case, the amount of rotation of the reel stand 23' in the direction opposite to arrow A' by the loading idler 60 is greater than the amount of rotation required to substantially completely store the magnetic tape 5 that has been pulled out. The difference between the preset rotation amount of the roll stand 23' and the rotation amount for actually storing the magnetic tape 5 is determined by the drive of the loading idler 60 and the roll stand 23'. This is absorbed by slippage occurring between the felt 32 and the wheel 31 or between the drive mechanism 31 and the main rotating body 26. Furthermore, during loading, the outer edge 49 of the loading cam 44 was placed against the cam follower 48, and the cam follower 48 was moved by a stroke, but during unloading, the inner edge 49 of the loading cam 44 was placed on the cam follower 48. 49' comes into contact and returns this cam follower 48 by one stroke. Reference numeral 115 shown in FIG. 7 is a detent roller that is pressed against the outer peripheral surface of the loading cam 44 by spring bias (mechanism is omitted), and when the loading cam 44 is rotated, a detent groove provided on the outer peripheral surface is formed. 116 or 116', and positions and holds the loading cam 44 before and after loading. Next, the playback operation will be explained. As shown in FIG. 4, a metal drive round rod 85 is integrally attached to a play button 15 made of synthetic resin and rotatable about a button shaft 14a supported by a button holder 14. (Note that the recording button and the pause button have the same structure.) By pressing the play button 15 in the direction of the arrow C, the drive round bar 85 rotates in the direction of the arrow.
A tension spring 87 for returning the play button is stretched between a part of the play button 15 and the button holder 14, and the play button 15 is pressed against this spring 87. As shown in FIG. 2, in the state before tape loading, the drive round rod 85 of the play button 15 is connected to the horizontal hole part 7a of the L-shaped hole 47a formed in the operation lock plate 47, and therefore Since the driving arm 85 cannot be moved in the direction of the mark being lost, the play button 15 cannot be pressed. In other words, the configuration is such that no playback operation can be performed before the tape is loaded. On the other hand, the same goes for the recording button 1, whose driving round rod 86 is fitted with the L-shaped hole 47M of the operation lock plate 47 as shown in FIG. It is also impossible to operate the recording button a7.When tape loading is performed, as the operation lock plate 47 moves in the direction of the arrow 'as shown in FIG. After the tape 47b is moved, it can be moved in the direction indicated by the arrow, and both playback and recording operations are possible.By pressing the play button tortoise 5 after loading the tape, the drive rod 85 is activated as shown in FIG. Move forward and the button is locked by the lock protrusion 98 of the button lock plate 9. The button lock plate 89 is attached to the button holder I4.
It can be moved back and forth in the direction of the arrow shown in Figure 9 using one guide hole (not shown) as a guide, and
It is biased to slide in the direction of the arrow by a tension spring 92 stretched between this and the button holder 14, and its biased movement is prevented by drive rods 85; 86 and the like. As the driving round rod 85 moves in the direction indicated by the arrow, the main rod 93, one end of which is engaged, is inserted into the guide pin 94 installed on the board 1' and the hole 93a in the head board mounting ridge 95. 93b is guided and slid in the direction of the arrow. A protrusion 96 is provided at the end of the main rod 93 to support a portion of the brake arm 369 36'. As the main rod 93 moves forward, the protrusion 96 releases the tension spring 3.
9, the brake shoes 38, 38' are separated from the reel stands 23, 23' in order to rotate the brake arm 36' clockwise and the brake arm 36' counterclockwise. Further, the idler 34 is rotatably supported on a shaft 97 mounted on an idler arm 98.
This Hydra arm 98 is mounted on a shaft 101 on an arm 100 rotatably supported on a shaft 99 mounted on the substrate 1.
It is rotatably supported around the fulcrum. A tension spring 1 is provided between the idler arm 98 and the spring hanging portion of the board 1.
02 is stretched, and the idler 34 is always energized in the direction of arrow O. A bending protrusion 103 is provided on a part of the arm turtle 00, and this bending protrusion 103 is engaged with a hole 104 formed at the tip of the main rod 93, thereby causing the main rod 93 to move to the second position. When in the stop position shown in the figure, the idler 34 is moved in the opposite direction to the arrow, and the shaft 97 is brought into contact with the top of the triangular hole 9 of the board 1, and the idler 34 is attached to the board 1. Motor pulley turtle Q6 of reel motor turtle 06 and reel stand 23? 23'. When the play button 5 is operated and the main rod 93 is moved in the direction of the arrow, the brake shoe 38838' moves to the reel stand 32, as described above.
32' and the idler arm 98 is released, the idler 34 is brought into contact with both the motor pulley 86 and the drive wheel 31 of the reel stand 23' by the tension spring 102. Power is supplied to the reel motor gQ6 by moving the main rod 93 in the direction of the arrow and turning on a switch (not shown).
Therefore, the motor pulley turtle 05 of the reel motor 106 rotates clockwise, and this moves from the idler 34 to the reel stand 23.
', this reel stand 23' is rotated in the direction opposite to arrow A, and the capstan turtle 3 and pinch roller 20 are rotated.
The magnetic tape 5 fed out is wound up. Further, the drive ring 85 is inserted through the board and the hole 107 of the play rod (see FIG. 10) located on the back side of the board wing.
a, and therefore, when the play button 15 is operated, the play rod turtle Q7 is engaged with the guide shaft 1 which is shielded on the board 1.
14 and 114' as guides, it is slid in the direction of the arrow. As shown in FIG. 3, the stop lever 84 is rotatably supported by a shaft IQ8 provided on the board 1, and this stop lever 84 is inserted into a square hole 109.
The protrusion 110 of the play rod 107 is engaged with the square hole 109 of the play rod 107 . Further, a tension spring 111 is stretched between one end of the stop lever 84 and the spring-loaded portion of the board 1, and the stop lever 84 is rotated clockwise and is normally attached to the board 1. It comes into contact with a stopper 112 to prevent its rotation. Furthermore, a stopper part 113 is provided on a part of the stop lever 84, and is adapted to restrict the rotational position of the pinch loaf drive pin 66 of the pinch roller arm 65, which is indicated by a chain line in FIG. In Fig. 3, the position of the pinch roller drive pin 66 before tape loading is shown.

[As shown in position a, when tape loading is performed and the pinch roller drive pin 66 reaches the 'b' position as the pinch roller arm 65 rotates, the pinch roller drive pin 66 moves toward the stopper 113. The rotation of the pinch roller arm 65 is stopped. Thereafter, as shown in FIG. 10, when the play rod 107 moves in the direction of the arrow and the stop lever 84 with the protrusion 110 rotates counterclockwise against the tension spring 111, the pinch roller drive pin 66 67, the pinch roller 20 comes into contact with the capstan 13 for further rotation. Similarly to the reel motor 106, the switch is turned on and power is supplied to the capstan motor 166 by the advancement of the main rod. Because it is in a rotating state, the magnetic tape 5
is run to the left with back tension applied by the tape guide rod 79 and felt pad 8. To explain the above-mentioned playback operation continuously, first, by pressing the play button 15, the drive round bar 86 is locked by the lock protrusion 90 of the button lock plate 89, the main rod 93 moves forward, and the reel pedestal 23,
Release the brake that was braking 23'. Furthermore, the idler 34 connects the motor pulley 105 to the reel stand 2.
3', and transmits the rotational force of the reel motor 106 to the reel stand 23'. Further, as the main rod 93 moves forward, the play rod 107 moves, and the stop lever 84 rotates. As a result, the pinch roller 20 whose position was regulated in front of the capstan 13 comes into contact with the capstan 13, and the magnetic tape 5 starts running, and the magnetic tape 5 is wound around the reel hub 4'. The magnetic tape 5 travels from the upstream side during playback by first being guided by the tension detection roller 21, then by the tape guide bar 79, and after passing through the head group by the tape guide bar 79'. . Next, the mechanical parts and their operations related to the pose operation will be explained. While the tape is running in the above playback condition,
By pressing the pause button 16, the pause rod 117 is moved from the direction of the arrow, that is, from the state shown in FIG.
It moves to the state shown in FIG. 11 against this. This pause rod 117 moves while its outermost hole 117b is guided by the reference pin 3. A slope cam portion 118 is provided on a part of the pause rod 117, and the slope cam portion 1
A cam follower 119 is engaged with 18. The cam follower 119 is attached to one end of the pause cam lever 120, and the pause cam lever 120 is rotatably supported around a shaft 121 on the base plate 1.The other end 122 of the pause cam lever 120 is connected to the pinch roller arm 65. When the pause rod 117 moves in the direction of the arrow, the cam follower 119 moves on the slope of the slope cam part 118.
As a result, the pause cam lever 120 is rotated in the direction of the arrow force as shown in FIG.
Rotate in the direction of the arrow y. As a result, capstan 1
The pinch roller 20', which had been in pressure contact with the capstan 3, is separated from the capstan 13, and the tape running drive by the pinch roller 20 and the capstan 13 is stopped. On the other hand, in this state, the motor pulley 105 and the reel stand 23' are in rolling contact with the dragler 34, and the reel stand 23' continues to wind the tape, but the board 1
The switch 123 mounted on the pause rod 117
When pausing by moving the reel motor 106, the power is turned off.
Since it is configured to perform FF, the rotation of the reel stand 23 is stopped and the magnetic tape 5 is completely stopped. During this pause, the idler 34 is placed in a pressed state on the reel stand 23', so the reel stand 23' is braked by the idler 34, preventing unnecessary rotation and preventing the magnetic tape 5 from sagging. As a method of blocking the winding force of the reel stand 23' during the pause, a method of turning off the power of the reel motor 106 has been described here.
As another embodiment, the following configuration may be used. That is, an electric circuit (not shown) is provided that reduces the voltage of the reel motor 06 when the switch 123 detects the movement of the pause rod 117, so that the winding force by the reel stand 23' can be fully applied during the pause operation. By continuously applying a low torque, that is, a winding force smaller than the back tension force of the magnetic tape 5 to the reel stand 23', the magnetic tape 5 is stopped without running during a pause. This has the effect that the magnetic tape 5 can be stopped without causing any slack or the like. Furthermore, a bent portion 124 is provided at the tip of the pause rod 117 and protrudes to the back side through the elongated hole la of the substrate 1, and a latch pin 125 is secured to the bent portion 124. As shown in Fig. 2, when the pause button 6 is pressed, the pause rod turtle 17 moves from the state shown by the solid line to the state shown by the double-dotted chain line, and the latch pin official 26 becomes the "push-on push-off latch plate turtle." 26. This push-on push-off latch plate 126 is rotatably provided on an angle 127 provided on the board 1. This push-on push-off latch plate 126 is attached to a general magnetic tape device. It has a configuration widely used in, etc., and a detailed explanation of its configuration and operation will be omitted here.By pressing the pause button 16 as described above, the pinch roller 2Q is separated from the capstan 13, and When the pause red GI7 is latched and the pause button is pressed again, the latch is released and the playback state is restored.Therefore, the pause state is the same as the pause button 16.
It will be retained even if you remove your hand from it. Then fast forward, rewind'
The related mechanical parts and their operations will be explained. Reference numeral 127 denotes a fast forward/rewind operation lever, which is rotatably provided around a shaft 128 (see FIG. 10) mounted on the base plate 1 as a fulcrum. When the grass feeding and rewinding operation lever 127 is rotated to the R position, the grass is rewinded, and when it is rotated to the F position, the grass is fast forwarded. The fast-forward/rewind operation lever 127 is provided with a T-shaped groove 129, and the drive round 85 of the play button 15 is inserted adjacent to this T-shaped groove 129. In the stopped state, the drive round bar 85
is located at the central intersection of the T-shaped groove 129 as shown in FIG. 3, and in the reproducing state, the T-shaped groove 12
9 into the vertical groove 129a. Therefore, in the playback state shown in FIG. 10, even if an attempt is made to operate the fast-forward/rewind operating lever 127, the wall 130 or 131 of the T-shaped groove 129 will come into contact with the drive bar 85, and therefore the fast-forward or rewind operation will not be possible from the playback state. Undo operation is not possible. As shown in FIG. 3, in the stopped state, the driving round rod 85 is
T-shaped groove 129 without supporting 0 or 131
Since it is movable within the horizontal groove 129b, fast-forwarding and rewinding operations are possible. Also, by performing fast forwarding and rewinding operations, the driving round bar 85 is moved to the T position as shown in FIG.
[Horizontal groove part of character-shaped groove 129]] Since it is carried into 29b,
Even if you press the play button wing 5 in this state, the drive round 85
is in contact with the wall ridge 32, and therefore the playback operation is impossible in the fast forward/rewind state. The long hole LB of the board is installed in the tub?
Driving edges 136 and 137 are provided which can be engaged with the pin turtle 34 and the mat 35 that protrude to the back surface through the turtle c. Now, in order to perform a rewind operation from the stopped state shown in FIG. 3, by rotating the fast forward/rewind operation lever 127 to the R position, the drive green section 136 is turned on as shown in FIG.
contacts the pin turtle 34 of the main rod 93, and the main rod 93 moves in the direction of the arrow. Also, this is a fast forward and rewind operation lever to perform fast forward operation as well! 27
By rotating the drive green part 137 to the F position,
contacts the pin 135, and the main rod 93 moves in the direction of the arrow. The tension pad release lever 138 is provided so as to be rotatable about a shaft 139 provided on the board 1 as a fulcrum, and a pin 74 provided on a part of the lever 138 passes through the hole ld in the board 1 to the front side. 6, and is provided so as to engage with a portion of the tensioning means mounting arm 72 which is rotated in the direction of arrow T as shown in FIG. The pin 74 in the stopped state fits into the recess 133 of the fast forward/rewind operation lever 127 as shown in FIG. 3, while the pin 74 in the rewind state
As shown in Fig. 13, the table feed/rewind operation lever 1
The lever 12 is removed from the recess 133 by the rotation of the lever 27.
7 is brought into contact with the edge 127a. In addition, in the machine feeding state, the pin 74 is removed from the recess 133 and is supported by the edge 127b of the fast forward/rewind operating lever 127. Therefore, the tension pad release lever 138 is rotated in the direction of the arrow in both the rewinding operation and the fast forwarding operation. 140 is a holder attached to the substrate 1, and 141 is a lock plate that locks the fast forward operation state or the rewind operation state of the fast forward/rewind operation lever 127. The lock plate 141 is movable in the direction of the arrow with guide shafts 142a and 142b provided in the holder 140 and a long hole guided by the shaft 128, and is always tensioned between the lock plate 141 and the play rod 107. Suspended tension spring 143
The force is being moved in the direction of the arrow. A hole 141a is provided in a part of the lock plate 141, and a recess e,
f and g are provided. In the stopped state, the lock pin 1 installed in the recess f as a shield on the fast forward/rewind operating lever 127
49 is engaged and its position is maintained, and by performing a rewinding operation, the lock pin 149 is engaged with the recess e and its operating state is maintained, and by further performing a fast forwarding operation, the lock pin 149 is is engaged with the recess g to maintain its operating state. The fast-forward/rewind operation lever 127 held in this manner returns to the stopped state by manually rotating the lock plate 141 to the stop position to release each lock. It is also unlocked by moving it against the spring 143 and returns to the stopped state. Reference numeral 144 denotes a rewind lever, which is rotatably provided around the shaft 145 of the board 1 as a fulcrum, and has a pin 146 at one end that engages with the diagonal green 127c of the fast forward/rewind operating lever 127. A recess 147 is formed at the end of the pond. One end edge 147a of the recess 147 is in contact with the shaft 97 of the idler 34 in the stopped state as shown in FIG. 3, and prevents the idler 34 from moving toward the supply reel stand 23 during playback or fast forwarding. There is. Furthermore, rewind lever 1
44, the tip is near the recess 147.
A leaf spring 148 located at 7 is attached. 13th
When performing the rewind operation as shown in the figure, the rewind lever 1
44 rotates in the direction of the arrow ``S'' as the fast forward/rewind operation lever 127 rotates. The rotation of the rewinding lever 144 causes the leaf spring 148 to come into contact with the shaft 97 of the idler 34, forcing the idler 34 to move in the direction of the reel stand 23 against the tension spring 102, and to bring it into contact with the reel stand 23. . On the other hand, a switch (not shown) is provided that can be switched by rotating the fast-forward/rewind operation lever 127, and this switch causes the reel motor 06 to move its motor pulley 105 counterclockwise in FIG. 3 during the fast-forward operation. , and when rewinding, motor pulley 1
05 is configured to switch so that it rotates clockwise. Here, fast-forwarding and rewinding operations are possible both before the magnetic tape 5 is loaded, that is, when the magnetic tape 5 is stored in the cassette 2, and when it is being loaded. The operation is explained below. First, when the fast forward/rewind operation lever 127 is rotated to the R position before loading the magnetic tape 5, that is, in the state shown in FIG. 2, the lock pin 149 is engaged and held in the recess e. As the pin 134 is actuated by this rotational operation, the main rod 93 moves forward and the brakes on the reel stands 23 and 23' are released, and at the same time the idler 34 is pressed against the motor pulley 105. At the same time, the reel motor 106 is driven, and the idler 34 is brought into rolling contact with the reel stand 23 by the leaf spring 148 in order to rotate the rewinding lever 144 in the direction of the arrow X as shown in FIG. As shown in FIG. 2, the reel stand 23 is rotated and a tape rewinding operation is performed. Although the pin 74 is actuated during the tape winding operation before tape loading, this has no bearing on the tension means mounting arm 72 since it is in the retracted position. On the other hand, when the fast forward/rewind operation lever 127 is rotated to position F to obtain fast forward operation from the state before tape loading, the lock pin 149 is engaged and held in the recess g, so that the lever 127 is rotated. Even when the hand is released, the operating state is maintained, and as the pin 135 is actuated by this rotating operation, the main rod 93 moves forward in the same way as when rewinding, and the brake of the reel stands 23, 23' is released. Further, the idler 34 is pressed against the motor pulley 105. At the same time, the reel motor 106 is driven to rotate in the opposite direction to that during rewinding, and as the idler 34 moves forward, the idler 34 is pulled by the tension spring 102 and the reel stand 23 is pulled by the tension spring 102.
The reel base 23' is also rotated, so that the reel stand 23' is rotated and fast-forwarding of the tape is performed. Although the pin 74 is actuated during this tape fast-forward operation, this operation has no relation to the tape rewind operation. Next, when rewinding or fast forwarding is performed in the tape loading state, the difference from the above-mentioned case in which these operations are performed from the state before tape loading is that the tension means mounting arm 72 is moved by the pin 74 to the position shown in FIG. The felt pad 8 is rotated in the opposite direction to the direction indicated by the arrow.
The pressure of the magnetic tape 5 on the tape guide rod 79 is released. That is, the tension means mounting arm 7 is connected by the pin 74.
2 is energized by the felt pad 79, which is rotated slightly in the direction of the mark-off direction, so that the felt pad 5 is brought into direct contact with the tape guide bar 79 during the tape loading operation. 80 is moved backward so that there is no problem in tape fast forwarding and rewinding operations. Furthermore, the fast forwarding or rewinding operation in this tape loading state is performed while the magnetic tape 5 is guided by the rotating body, which rotates as the magnetic tape 5 runs, both of the pinch roller 20 and the tension detection loaf 20. Therefore, the running load on the magnetic tape 5 is small, and the tape is stably fed at high speed. In addition, in this case, the magnetic tape 5 is
12, it is possible to detect the cue signal recorded on the magnetic tape 5, especially from the cue head 1.
By detecting the cue signal, control such as automatically stopping the magnetic tape 5 can be performed. Although it is not explained specifically here, tape running will be more stable if you change the winding torque of the reel stand during playback and the winding torque of the reel stand during fast forwarding and rewinding. By arranging a switch that detects the state, fast forwarding, and rewinding state, the input voltage of the reel motor 106 is changed to fast forward and increases during rewinding, so that the winding torque in each mode becomes the most optimal torque. It is set. Next, the stop mechanism and its operation will be explained. First, the stop operation in the playback state will be explained. 1st
It has a mechanism for moving the button lock plate 89 shown in FIG. 2 in the direction of the misprint by pressing the stop button 22 shown in the figure. (Description of related mechanisms will be omitted). 9th
As shown in the figure, when the stop button 22 is operated from the locked state, the button lock plate 89 is pulled out by the spring 9.
By moving it in the direction of the arrow T against 2, the lock protrusion 90' causes the driving arm 85 to be unlocked, thereby unlocking the reproducing state and returning to the stopped state. Next, the operation of detecting the end of the tape during playback and performing auto-stop will be described. When the end of the tape is detected, a signal is given to the solenoid 154 attached to the back side of the board 1, and the solenoid 1
54 is now operational. (The method of detecting the end is a known technique, and its explanation will be omitted). The pin 154a of the solenoid 154 is engaged with the notch 155a of the solenoid lever 155, and the suction operation of the solenoid 154 moves the solenoid lever 155 from the position h to the position i shown in FIG. 156 as a fulcrum. A bent portion 157 formed on the solenoid lever 155 protrudes to the surface through the hole ld of the base plate 1 and engages with a hook portion 158 of the port movement plate 151. Therefore, as the solenoid lever 155 rotates, the control plate 151 rotates about the shaft 159 on the base plate 1 from the position shown by the solid line in FIG. 9 to the position shown by the chain line. In addition, this waiting board 151
The outermost holes 151a and 151b are provided at both ends, and the shaft 159 is joined to the elongated hole 151a. A pin 150 is hammered into the button lock plate 89, and this pin 1
5 is engaged with the largest hole 151b of the sliding plate 151.
Therefore, by the suction operation of the solenoid 154, the button lock plate 89 is moved in the direction of the arrow T via the solenoid lever 155 and the sliding plate 151, thereby automatically stopping the playback state by detecting the end of the tape. . Next, a stop mechanism related to the pause state will be explained. As shown in FIG. 2, a square hole 152 formed in the pose rod 117 and a protrusion 153 provided on the sliding plate 151 are engaged with each other, so that the pose rod 117 during the pose operation is engaged.
Following the movement, the sliding plate 151 follows and moves to the position shown in FIG. In the state shown in FIG. 11, the hook portion 158 of the sliding plate 151 and the bent portion 157 of the solenoid lever 155 are disengaged. Therefore, even if the solenoid 155 performs the suction operation in this state, the rotation of the swamp plate 151 does not occur. is not performed and the push button is not unlocked. However, as shown in particular in FIG.
The bush-on push-off latch plate 126 is configured to move in the latch release direction when the solenoid lever 155 is extended by the suction operation of the solenoid 154. This results in
When the solenoid 154 is sucked in the pause state,
First, the latch in the pause state is released, and the operation mode is returned to the playback or recording state. After that, when the solenoid 154 performs a suction operation, the playback state (recording state) is unlocked and becomes a stop state, as described above in the explanation of the automatic stop of the playback operation. Note that when the stop button 22 is pressed in the pause state, the button lock plate 89 moves and the pin 150 causes the sliding plate 151 to move.
is rotated to the chain line position in FIG. 11), the solenoid 154 is rotated to the i position in the same manner as when the solenoid 154 is operated, and the pause rod 117 is unlatched. That is, if a stop operation is performed while in the paused state, the paused state is canceled at the same time. Next, the stop operation in fast forward and rewind states will be explained. To cancel the fast-forward or rewind state, in addition to manually rotating the fast-forward/rewind operating lever 127 to the stop position as described above, the suction operation of the solenoid 154 can also be used during fast-forward or rewind. It is configured to perform an automatic stop. That is, by operating the fast forward/rewind operation lever 127, the lock pin 149 is locked into the recess e or g of the lock plate 141, and at the same time the tension pad release lever 138 is moved in the direction of the arrow as shown in FIG. It is in a rolled up state. A selection lever 161 is connected to a part of the lock plate 141 so as to be rotatable about a shaft 162.
A tension spring 164 is applied between the lever 161
The bent portion 163 is provided at the tip of the tension pad release lever 138 so as to always assist. Therefore, the selection lever 161 is rotated in accordance with the rotation of the tension butt release lever 138, and the tip of the selection lever 161 is connected to the arm 165 of the solenoid lever 155 as shown in FIG.
is brought to a position where it can engage with the tip of the Therefore, when a fast forward or rewind operation is performed, the solenoid 1
54 is attracted, the arm 165 comes into contact with the tip of the selection lever 161 and moves the selection lever 161 to the state shown by the chain line in FIG. As the selection lever 161 moves, the lock plate 14
1 moves in the direction indicated by the arrow, the lock pin 149 is unlocked by the recess e or g, and the fast forward/rewind operating lever 127 is automatically returned to the stop position by the return force of the main rod 93 and the like. Note that it is possible to unlock the fast forward or rewind state by rotating the solenoid lever 155, as described above for unlocking during playback, by operating the stop button 22 in the fast forward or rewind state. It is also possible to stop the three states of fast forwarding or rewinding. Next, the recording button 17 and its operational configuration will be described.
The drive ring 86 of the recording button 17 can be engaged with the lock protrusion 167 of the button lock plate 89, and the recording button 1
When 7 is pressed, the drive round bar 86 moves forward and locks the lock protrusion 16.
7, and is therefore pressed by the lock protrusion 167. will be checked. In this case, a recording/reproduction changeover switch (not shown) is switched in the same manner as in a general device to enable recording, and by pressing the play button 15 at the same time, the magnetic tape 5 is driven and a recording operation is performed. As is clear from the above embodiments, the present invention provides a tape extracting means for extracting a magnetic tape stored in a cassette to a predetermined position outside the cassette, and a tape extracting means for extracting the magnetic tape from the cassette. A tape loading state is obtained in which the tension applying means presses the magnetic tape against the tape guiding means, and when a playback operation is performed in this tape loading state, the pinch roller, which serves as another tape pulling means, comes into pressure contact with the cab stan and the magnetic tape is pressed against the tape guide means. is caused to run at a constant speed, and by performing a pause operation in this constant speed running state, the pinch roller is separated from the capstan, cutting off the constant speed running drive of the magnetic tape, and the back tension applying means is used to tighten the magnetic tape. The magnetic tape is pressed against the guide means, and on the other hand, by performing a tape high-speed feeding operation in the tape loading state, the back tension applying means is moved backward and high-speed feeding is performed. Since the device is configured to apply back tension to the magnetic tape by the back tension applying means and the tape guiding means in conjunction with the pulling operation, the magnetic tape is applied at the same time as the playback operation starts.
Back tension is applied to the magnetic tape to ensure stable tape running at a constant speed.However, during pauses, the back tension applying means acts as a means for braking the magnetic tape and preventing it from sagging when stopped, and the magnetic tape is pulled out from the cassette. This device reliably maintains the paused state of the magnetic tape, and therefore does not require any other special section for preventing the magnetic tape from sagging, and the tape sagging prevention structure can be obtained with a simple structure. It is. Furthermore, when the tape is fed at high speed from the tape loading/disengaging state, the back tension applying means is automatically retracted so that the back tension applying means does not act on the high speed running of the magnetic tape. It is capable of running and has great practical value.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a top view of the cassette installed state, FIG. 2 is a top view of the twill part of the machine, and FIG.
4 is a sectional side view of the same, FIG. 5 is a front view showing the head block, FIG. 6 is a top view for explaining the operation of the tape loading mechanism, and FIG. 7 is a loading cam. FIG. 8 is a partially sectional side view of the reel stand, FIG. 9 is a top view of the main mechanism during playback operation, FIG. 10 is a bottom view of the lozenge mechanism during playback operation, and FIG. 12 is a side view of the main part of the pause operation mechanism, and FIG. 13 is a bottom view of the main part of the mechanism in the rewind operation state. 1... Board, 2... Cassette, 5...
...magnetic tape, 6,6'...notch, 7,7'...lid,
8... Head board, 13... Capstan, 1
5...Play button, 16...Pause button, 17...Record button, 19...Loading knob, 20...Pinch roller, 21...Tension detection loaf, 22... Stop button, 23, 23'...
...Reel stand, 34...Idler, 36, 36'...Brake arm, 44...Loading cam, 47...
Operation lock plate, 52...Loading lever, 56
...Fan theory, 60...Loading idler, 65...
... Pinch roller arm, 70 ... Lid opening/closing claw,
72... Tension means mounting arm, 93... Main rod, 105... Motor pulley, 107... Play rod, 117... Pause rod, 120... Pause cam lever, 126... Push-on push-off latch plate, 127 ...Fast forward/rewind operation lever, 138...
...Tension pad release lever, 141...
...Lock plate, 149.... ...Lock pin, 144...
... Rewind lever, 154 ... Solenoid, 155
...Solenoid lever, 161...Selection lever. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13

Claims (1)

[Claims] 1. Using a cassette that stores a magnetic tape and has an open part at the front end and a plurality of notches extending over the upper and lower surfaces of the front end, the magnetic tape is pulled out of the cassette from the open front end to drive the tape. A magnetic recording/reproducing apparatus comprising a substrate, a first tape extracting means comprising a pinch roller that enters into one notch of the cassette when a cassette is mounted on the substrate, and a first tape extracting means for extracting the other cassettes. a second tape pull-out means and a back tension applying means that simultaneously enter one notch; a loading means for commanding a tape loading operation to pull out a magnetic tape from a cassette; and a recording, playback, and erasing device attached to the board. a group of heads for performing the above operations, a tape guide means provided upstream of the group of magnetic heads with respect to the running of the magnetic tape, a capstan, a reproduction operation member, a pause operation member, and a relation with the back tension applying means. and a tape high-speed feed operation member that operates a tape high-speed feed mechanism including a reel stand, and the first tape draw-out means and the second tape draw-out means are operated by the operation of the loading means with the cassette mounted on the board. The magnetic tape is moved to a predetermined position outside the cassette, and the back tensioning means moves together with the second tape drawing means to obtain a tape loading state in which the magnetic tape is pressed against the tape guiding means. By operating the playback operation member in the tape loading state, the first tape pulling means is brought into pressure contact with the capstan via the magnetic tape, and the back tension applying means and tape guiding means apply back tension to the magnetic tape. The magnetic tape is caused to run at a constant speed while the magnetic tape is running at a constant speed, and by operating the pause operation member while the magnetic tape is running at a constant speed, the first tape pull-out means is separated from the cap stan, thereby causing the magnetic tape to run at a constant speed. While the drive is cut off, the magnetic tape is pressed against the tape guide means by the back tension applying means, and the back tension applying means is moved by operating the tape high speed feeding operation member in the tape loading state. 1. A magnetic recording and reproducing device, characterized in that it is separated from a guide member and configured to perform a tape high-speed feeding operation by operating a tape high-speed feeding mechanism.