JPS6010382B2 - magnetic recording and reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a magnetic tape stored in a reel-reel cassette through a gate provided at the front end of the cassette.
The present invention relates to a magnetic recording and reproducing device that can record or reproduce audio signals, etc. by pulling out the cassette and applying it to 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', which are fixed to the substrate 1, into holes 2a, 2b provided in the cassette 2. Reference numerals 4 and 4' designate hubs housed in the cassette 2, in which the magnetic tape 5 is wrapped.

The magnetic tape 5 is stretched along the open front end portion provided on the cassette 2. The front end of the cassette 2 is provided with notches 6, 6' extending over its upper and lower surfaces. Further, the front part of the cassette 2 is provided with rotatable lids 7, 7' for covering the front ends of the entrances of the notches 6, 6'.
The lids 7, 7' are always in a closed state under the force of a spring, and can be opened when desired by using the shafts 7a, 7a' as fulcrums, respectively, against the urging force of the spring, as shown by chain lines. It is. At a position facing the front end of the cassette 2 of the board 1 is a head board mounting rail 9 in which the head board 8 is shielded from the board 1.
The erase head 9, the cue head 10, the recording head 11, and the playback head 12 are respectively attached to the head board 8, and the upstream and downstream sides of the magnetic tape 5 of each head are attached to the head board 8 with screws. Tape guide rods 79, 79' are attached to each side. A button holder 14 is provided on the substrate 1, and operation buttons such as a play button 15, a pause button 16, and a record button 17 are rotatably provided on a button shaft 14a of the button holder 14. 22 is a stop button.

Reference numeral 127 is a fast forward or rewind operation lever, and 19 is a loading knob. Details of these operations 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. Reference numeral 13 denotes a capstan that serves as a rotating shaft of a capstan motor 166.

FIG. 2 is a top view showing the arrangement of the mechanism parts with the cassette 2, head block, and pushbuttons removed. Only the main components will be explained here, and details will be given later when explaining each mode. I will explain.

Reel stands 23 and 23' have the same configuration, and as shown in FIG. 8, one of the reel stands is hammered into the base plate 1 via a boss 24 and rotatable around 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.

A claw 2 is provided around the upper stopper 27 so as to be slidable in the vertical direction.
9 is provided, and the inner circumference of this pawl 29 and the main rotating body 26
The saddle mating part with the hexagonal hole competes with the pawl 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 claw 2.
9 is always urged upward by a spring 30. A driving mechanism 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 driving mechanism 31. A compression spring 33 is interposed between the drive wheel 31 and the lower stopper 28, and the rotational force transmitted from the idler 34 to the drive mechanism 31 is transmitted to the main rotating body 26 by the frictional force of the felt 32. It is configured.
35 is a cap for preventing the reel stand from coming off the reel shaft 25.

As shown in FIG. 2, reference numerals 36 and 36' are brake arms, which can be extended around support shafts 37 and 37' provided on the board 1 as support points, and the brake arms 36 and 36'
Brake shoes 38 and 38' are provided on a portion of the brake shoes 38 and 38', respectively.

Furthermore, a tension spring 39 is tensioned between the brake arms 36 and 36' and is biased to rotate so as to pull the brake arms 36 and 36' together. As a result, the brake shoes 38, 38' are pressed against the drive mechanism 31 of the reel stands 23, 23' by the elastic force of the tension spring 39, respectively, and the reel stands 23, 23' are braked. There is. Due to the damage of the reel stands 23, 23' and the relationship between the brake supports 37, 37', the rotating direction of the arrows A and A' is the direction of rotation of the reel stand, and the arrows A and A' are the same. For rotation in the opposite direction, the brake is in the relief direction. The reference pins 3 and 3' have the same structure, and one
As shown in FIG. 2, it is composed of a standard koji part 40 made of metal and a cassette receiving part 41 made of synthetic resin. The lower end of the reference shaft part 40 is screwed to a predetermined part of the board 1, or
The cassette receiving part 41 has an iron gauge defined on the upper part of the koji part 40, a tapered part 42 at the tip to make it easier to insert the cassette 2, and a lower part to determine the height of the cassette 2. It has a flange portion 43. Next, the detailed structure and operation of the main layer 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 hawk cam 46 that is a part of a spiral, and a cam follower 48 rotatably supported by an operation lock plate 47 is arranged in the groove 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 a 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 direction of arrow H. A pin 55 is provided at the tip of the loading lever 52, and the pin 55 is engaged with a long notch 57 of the sector ring 56. The fan-shaped ring 56 is the reference pin 3
It is provided so as to be rotatable about the reference shaft portion 40 of the loading lever 52, and can be rotated counterclockwise from the state shown in FIG. 2 to the state shown in FIG. Let's do it. Furthermore, the reference shaft part 4 is the idler arm 58.
The elongated hole 58a is iron-coupled, and the idler arm 58 is configured to be rotatable about its shaft portion 40 as a fulcrum and to be able to slide in the 20,000 directions shown by the arrow in FIG.

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 connected to the shaft 5 at the other end of the idler arm 58.
It is rotatably supported by 8b. The loading idler 60' is biased in the direction of the loading knob 19 by a tension spring 59 and is always in rolling contact with the cylindrical side surface 61 of the fan-shaped ring 56, and is configured to rotate as the fan-shaped ring 56 rotates. has been done. The idler arm 58 is also biased in the direction of the arrow by a tension spring 59 and is brought into contact with a pin 62 provided on the loading lever 52, thereby causing the loading idler 6 or normally the reel stand 23 ' is in a state of being separated from the drive wheel 31.

Then, when the loading lever 52 starts rotating in the opposite direction of the arrow in FIG.
The idler arm 58, whose position had been restricted by the pin 62 of No. 2, rotates in the direction of the arrow due to the tension of the tension spring 59, and the loading idler 60 rotates in contact with the fan-shaped wheel 56 and moves to the drive wheel of the reel stand 23'. 31. When the loading lever 52 is rotated in the direction of the arrow H, the sector 56 is rotated in the opposite direction to the arrow, and the idler 60
attempts to rotate clockwise and transmit rotational force in the direction of arrow A' to the reel stand 23'. However, reel stand 2
The direction of rotation indicated by arrow A' in 3' is the direction of biting into the brake shoe 38', and the reel stand 23' is strongly braked, and the direction of rotation of the fan-shaped wheel 58 is the same as that of the idler 60.
'By being in the escape direction, Aidora 60
The fan-shaped ring 56 is rotated without rotating the reel stand 23'.
Further, when the rotation of the sector ring 56 approaches the end, the convex part 63 provided on the sector ring 56 comes into contact with the idler arm 58, causing it to rotate in the direction of the arrow. The loading idler 60 is rotated in the opposite direction to separate it from the reel stand 23' and stopped in the state shown in FIG. 6.

Further, the pin 62 of the loading lever 52 is engaged with the outermost hole 64a provided in the pinch roller arm drive rod 64.

The other 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 by 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 of the arrow H, 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 is driven. The load 64 moves to the left.

The pinch roller arm 65 is connected to its driving 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 provided at one end of the pinch roller arm 65, and the pinch roller shaft 69 is attached 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 65 rotates counterclockwise, the lid opening/closing claw 70 closes the lid 7 of the cassette 2.
' and opens this lid 7' to the position shown by the two-dot chain line in FIG. On the other hand, a pin 71 is implanted at 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 mounting arm 72 is rotatably provided around a shaft 73 provided on the base plate 1 as a fulcrum, and is normally biased to rotate in the direction of arrow T by a spring (not shown), but it is rotated by a pin 71. Its rotation is blocked. The tension means mounting arm 72 is in a pinch. As the pin 71 escapes as the roller arm 65 rotates counterclockwise, the pin 71 is configured to rotate from the state shown in FIG. 2 to the state shown in FIG. ing. 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 vertical 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 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.

Further, a tension arm 76 is rotatably mounted on the tension means mounting arm 72 between the shaft 73 and the diamond opening/closing pawl 75 by means of a support shaft 77 . A shaft 78 is mounted on one end of the tension arm 76, and the tension detection roller 21 is rotatably supported on the shaft 78. Further, the tension arm 76 is provided with a tension arm 76 that presses the magnetic tape 5 against the tape guide bar 79 to record and play the tape during tape travel.
A felt pad 80 for applying back tension to the magnetic tape 5 is attached. The outer peripheral surface of the tension detection roller 21 is located forward of the end surface of the felt pad 80 in the rotational direction of the tension means mounting arm 72 in the direction of arrow T. Further, a spring-loading portion 81 is provided at the other end of the tension arm 76, and a pressing force of the felt pad 80 is generated between this spring-loading portion 81 and the spring-loading portion 12a of the tension means supporting arm 72. For this purpose, a tension spring 82 is tensioned to bias the tension arm 76 clockwise. Moreover, as shown in FIG.
The tension arm 76 is in contact with a stopper 83 provided at the tension spring 82, thereby stopping the rotation of the tension arm 76 from being biased by the tension spring 82. 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 arrow C and the loading lever 52 moves in the direction of arrow H. Rotate to. Along with this, the idler 60 moves to the reel stand 23', but since the reel stand 23' is brake-braked, the idler 60 does not rotate. ′, and is stopped in that separated state. On the other hand, as the loading lever 52 rotates, the pinch roller arm 6
5 rotates counterclockwise, and the lid opening/closing claw 701 of the pinch roller arm 65 opens the lid 7' of the cassette 2.
is opened, and at the same time, the magnetic tape 5 is pulled out to a predetermined position by two pinch rollers located in the notch 6' of the cassette 2. At this time, the reel stand 23' is braked, but the magnetic tape is held by the felt 32 shown in FIG.
The main rotary body 26 is rotated against the frictional force of the compression tread portion, and the main rotating body 26 is pulled out. The pinch roller arm 65 is the pinch roller 2
0 rotates to the front of the capstan 13, the pinch roller drive pin 66 hits the stopper portion 113 of the stop lever 84 shown in FIG. 3, thereby stopping the rotation. Further, as the pinch roller arm 65 rotates, the tension means mounting arm is rotated in the direction of arrow H, and the lid opening/closing claw 75 is rotated.
When the lid 7 of the cassette 2 is opened, the tension detection roller 21 comes into contact with the magnetic tape 5, and the magnetic tape 5 is pulled out of the cassette 2 against the frictional force of the felt 32 of the reel stand 23'. Then, the magnetic tape 5 is placed at the final rotation position of the tension means mounting arm 72.
contacts the tape guide rod 79, then the felt pad 80 contacts the magnetic tape 5, and the felt pad 8 presses the magnetic tape 5 against the tape guide rod 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 being loaded. 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 in the notches 6, 6' of the cassette 2 again, and the lids 7, 7' are released from the springs. Closes due to return force. 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 sector 56 is also rotated in the opposite direction to the arrow.

As a result, the loading idler 6 comes into contact with the fan-shaped ring 56 and the reel stand 23', and the loading idler 60 rotates counterclockwise, and this rotation is in a biting state with respect to the reel stand 23'. reel stand 2
A rotational force in the opposite direction to that of the mismark A' is transmitted to the A'. The rotation of the reel stand 23' in the opposite direction to the misprint A' is a direction of escape for the brake shoe 38', so the reel stand 23' rotates by a predetermined amount in the opposite direction to the misprint A'. Then, 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 stored 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 loading idler 60 and the rotation amount of the roll stand 23'. This is absorbed by slippage that occurs between the felt 32 and the drive wheel 31 or between the drive wheel 31 and the main rotating body 26 . moreover,. During unloading, the outer edge 49 of the loading cam 44 comes into contact with the cam follower 48 and moves the cam follower 48 by a stroke, but during unloading, the inner edge of the loading cam 44 contacts the cam follower 48 49' comes into contact with this cam follower 4.
8 is returned by stroke 1. 115 shown in Figure 7
Loading cam 44 is activated by spring bias (configuration omitted)
A detent roller is pressed against the outer peripheral surface of the loading cam 44, and when the loading cam 44 is rotated, it engages with a detent groove 116 or 116' provided on the outer peripheral surface of the loading cam 44. Loading cam 44 before and after loading
positioning and maintaining it. 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 that is rotatable about a button shaft 14a supported by a button holder 14 as a fulcrum.

(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 bar 85 of the play button 15 is iron-fitted to the horizontal hole 47a of the L-shaped hole 47a formed in the operation lock plate 47. Since the round bar 85 cannot be moved in the direction of the arrow, 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 applies to the recording button 17, and its driving ring 86 is iron-fitted to the L-shaped hole 47b of the operation lock plate 47, as shown in FIG. Button 17 cannot be operated either. When tape loading is performed, as the operation lock plate 47 moves in the direction of arrow C as shown in FIG. 6, the drive round bars 85 and 86 move in the direction of arrow C after the L-shaped holes 47a and 47b move It is movable and can be used for both playback and recording operations.

After loading the tape, by pressing the play button 15, the drive round birch 85 moves forward as shown in FIG. 9, and the button is locked by the lock protrusion 90 of the button lock plate 89. The button lock plate 89 is attached to the button holder 14
Using the guide hole (not shown) provided in the 9th
A tension spring 92 is movable back and forth in the arrow direction shown in the figure, and is stretched between the tension spring 92 and the button holder 14.
It is biased to slide in the direction indicated by the arrow, and its biased movement is prevented by driving round rods 85, 86, etc.
As the drive round rod 85 moves in the direction of the arrow, the main rod 93, one end of which is engaged, connects to the guide pin 94 implanted in the board 1 and the elongated hole 93 in the head board mounting rod 95.
a and 93b are guided and slid in the direction of the arrow.
At the other end of the main rod 93, brake arms 36, 3 are attached.
A supporting protrusion 96 is provided in a part of 6'.

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 implanted in an idler arm 98.
This idler arm 98 is connected to a ball 101 on an arm 100 which is rotatably supported by a hoe 99 provided on the board 1.
It is supported so that it can be rolled around using the fulcrum as a fulcrum. A tension spring 1 is provided between the hydra arm 98 and the spring-loaded portion of the board 1.
02 is stretched, and the idler 34 is always energized in the direction of arrow O.

A bent protrusion 103 is provided on a part of the arm 100, and this bent 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 as shown in FIG. When the idler 34 is in the stop position shown in FIG. It is held in a position where it does not come into contact with either the motor pulley lo5 of the motor 106 or the reel stands 23, 23'. When the play button 15 is operated and the main rod 93 is moved in the direction of the arrow, the brake shoes 38, 38' move to the reel stands 32, 3 as described above.
2', the idler arm 98 is released, so that the idler 34 is brought into rolling contact with both the motor pulley 105 and the drive wheel 31 of the reel stand 23' by the tension spring 102.

Power is supplied to the reel motor 106 by turning on a switch (not shown) by moving the main rod 93 in the direction of the arrow.
Therefore, the motor pulley 105 of the reel motor 106 rotates clockwise, and this rotates from the idler 34 to the reel stand 23.
', the reel stand 23' is rotated in the opposite direction to the direction of the misprint A, and the capstan 13 and the pinch roller 20 are rotated.
The magnetic rope 5 sent out is wound up. Further, the drive round rod 85 is inserted through the board 1 and placed on the back side of the board 1.

The play rod 107 is engaged with the hole 107a of the rod (see FIG. 10) 107, and therefore, when the play button 15 is operated, the play rod 107 is engaged with the guide shaft 114, 114' that is attached to the base plate 1.
It is designed to slide in the direction of the arrow using as a guide. As shown in FIG. 3, the stop lever 84 is supported so as to be freely rotatable by a soft plate 108 that is covered with the base plate 1, and this stop bar 84 has a square hole 109. is engaged with the protrusion 110 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 pressed against the board 1. It is held against 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 shown by a chain line in FIG.

In FIG. 3, the position of the pinch roller drive pin 66 before tape loading is shown as the [a position], and as tape loading is performed, the pinch roller drive pin 66 is moved to the 'b' position as the pinch roller arm 65 rotates. When the pinch roller arm 65 reaches the tip, the pinch roller drive pin 66 contacts the stopper 113, and the rotation of the pinch roller arm 65 is stopped. Thereafter, as shown in FIG. 10, when the play rod 107 is moved in the direction of the arrow, the stop lever 84 is rotated counterclockwise with the protrusion 110 against the tension spring 111, and the pinch roller drive pin 66 is pulled. The pinch roller 20 is rotated further by the spring 67.
comes into contact with the capstan 13, and the capstan motor 16
Similarly to the reel motor 106, a switch is retracted and power is supplied uniformly to the main rod as the main rod moves forward.Therefore, since the cab stan 13 is in a rotating state, the magnetic tape 5 is under back tension by the tape guide register 79 and the felt pad 80. The vehicle is driven to the left with the . To explain the above-mentioned playback operation continuously, first, by pressing the play button 15, the driving round birch 86 is locked by the lock protrusion 90 of the button lock plate 89, the main rod 93 moves forward, and the reel Table 23, 23
Release the brake that was applying the brake.

Further, the idler 34 is in rolling contact between the motor pulley 105 and the IJ reel stand 23', 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 slides, and the stop lever 84 rotates.

As a result, the pinch roller 20 whose position has been regulated in front of the capstan 13 comes into contact with the capstan 13, starts running the magnetic tape 5, and the magnetic tape 5 is wound around the reel hub 4'. The magnetic tape 5 during playback is first guided by the tension detection roller 21 from the upstream side, then guided by the tape guide rod 79, and after passing through the head group is guided by the tape guide rod 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 moves in the direction of the arrow, with the hole 117a engaged with the drive rod 88, from the state shown in FIG. 2 against the tension spring 17 to the state shown in FIG. do. This pose rod 1
17 moves while its elongated 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 a pause cam lever 120, and the pause cam lever 120 is rotatably supported about a shaft 121 on the base plate 1 as a fulcrum. The pause cam lever 120 and the other 122 are in a pinch. It is configured to be able to engage with the pin 71 of the roller arm 65. By moving the pause rod 117 in the direction of the arrow, the cam follower 119 moves on the slope of the slope cam portion 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 that was attached to the capstan 1
This pinch roller 20 and the cab stun 1 are separated from each other.
The tape running drive by 3 is stopped. On the other hand, in this state, the idler 34 is in rolling contact with the motor pulley 105 and the reel stand 23', and the reel stand 23' attempts to continue winding the tape, but the switch 123 mounted on the board 1 is paused. By moving the rod 117, the power to the reel motor 106 is turned off during pause.
Since the rotation of the reel stand 23 is stopped, the magnetic tape 5 is completely stopped. During this pause, the idler 34 is placed in a compressed 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 has been described in which the power to the reel motor 106 is turned off, but the following configuration may be used as another embodiment. That is, an electric circuit (not shown) is provided that reduces the voltage of the reel motor 106 when the switch 123 detects movement of the pause rod 117, and when the pause operation is performed,
By 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' without completely cutting off the winding force by the reel stand 23', the magnetic tape 5 can be rotated during a pause. Stop without running. 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 provided in the bent portion 124. As shown in FIG. 12, by pressing the pause button 16, the pause rod 117 moves from the state shown by the solid line to the state shown by the two-dot chain line, so that the latch pin 125 is latched into engagement with the push-on push-off latch plate 126. Ru. This push-on push-off latch plate 126 is rotatably provided at an angle i27 provided on the board 1. This push-on push-off latch plate 126 has a configuration widely used in general magnetic tape devices, etc., and a detailed explanation of its configuration and operation will be omitted here. When pressed, the pinch roller 20 is separated from the capstan 13 and the pause rod 117 is latched, and when the pause button is pressed again, the latched engagement is released and the playback state is restored.

Therefore, the pause state is maintained even if the pause button 16 is released. Next, the mechanical parts and their operations related to fast forwarding and rewinding will be explained.

Reference numeral 127 denotes a fast forward/rewind operating lever, which is rotatably provided around a shaft 128 (see FIG. 10) mounted on a shield on the substrate 1 as a fulcrum.

When the fast forward/rewind operation lever 127 is rotated to the position (R), the rewinding state is set, and when the lever 127 is rotated to the position (F), the fast forwarding state is set.
The fast forward/rewind operating lever 127 is provided with a T-shaped groove i29, into which the drive round bar 85 of the play button 15 is inserted. In the stopped state, the drive round bar 85 is located at the central intersection of the T-shaped grooves 129 as shown in FIG. 3, and in the regenerated state, as shown in FIG.
It moves into the vertical groove portion 129a of the character-shaped groove 129. Therefore, in the playback state shown in FIG.
30 or 131 comes into contact with the driving rod 85, and therefore fast forwarding or rewinding operations are impossible from the playback state.

As shown in FIG. 3, in the stopped state, the driving arm 85 is
T-shaped groove 129 without contacting 0 or 131
Since it is movable within the horizontal twilling portion 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.
Since it is inserted into the horizontal groove part 129b of the character-shaped groove 129,
Even if you press the play button 15 in this state, the drive round bar 85
is in contact with the wall 132, and therefore playback operations are impossible in fast forward and rewind states. A recess 133 is provided in a part of the fast forward/rewind operation lever 127, and the main rod 93 is shielded, and the elongated holes lb, l of the base plate 1 are provided with a recess 133.
Driving shafts 136 and 137 are provided that can be engaged with pins 134 and 135 that protrude to the back surface through 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 1 is moved as shown in FIG.
36 comes into contact with the pin 134 of the main rod 93, and the main rod 93 moves in the direction of the arrow. Also, this is the same as the fast forward/rewind operation lever 1 to perform fast forward operation.
27 to the (F) position, the driving green portion 137 comes into contact with the pin 135, and the main rod 93 moves in the direction of the arrow. Tension pad release lever 13
8 is rotatably provided around a shaft 139 provided on the board 1 as a fulcrum, and a pin 74 mounted on a part of the discussion bar 138 penetrates through the hole ld of the board 1 to the front side. 6, and is provided so as to engage with a part of the tensioning means mounting arm 72 which is in a state of being rotated in the misprint direction. Pin T4 in the stopped state is the third
As shown in the figure, the pin 74 is inserted into the recess 133 of the fast forward/rewind operation lever 127, and on the other hand, the pin 74 in the rewind state is moved by the fast forward/rewind operation lever 127 as shown in FIG. It comes off from the recess 133 and comes into contact with the green 127a of the lever 127. Further, in the fast-forward state, the L pin 74 similarly comes off from the recess 133 and comes into contact with the edge 127b of the fast-forward/rewind operation lever 127. Therefore, the tension button 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 board 1, and 141 is a lock plate that locks the fast forward/rewind operating state of the fast forward/rewind operating lever 127.

The lock plate 141 is slidable in the direction indicated by the arrow by guide shafts 142 a and 142 b shielded by the holder 140 and elongated holes guided by the shaft 128 , and is always tensioned between the lock plate 141 and the play rod 107 . 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 c 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 other end.

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 combined reel stand 23 during playback or fast forwarding. There is. Furthermore, the tip of the rewind lever 144 is located near the recess 147.
A leaf spring 148 located at 47 is attached. 1st
When the rewinding operation is performed as shown in FIG. 3, the rewinding lever 144 rotates in the direction of the missing mark following the rotation of the fast forward/rewinding operation lever 127. This rewind lever 144
The leaf spring 148 comes into contact with the shaft 97 of the idler 34 and the idler 34 is forcibly moved in the direction of the reel stand 23 against the tension spring 102 and brought 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 106 to move its motor pulley 105 counterclockwise in FIG. 3 during the fast-forward operation. , and when rewinding, the motor boot I
J105 is configured to switch so as to rotate 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 loaded. The operation is explained below. First, when the fast forward/rewind operation lever 127 is rotated to the (R) position before the magnetic tape 5 is loaded, that is, in the state shown in FIG. This rotating operation activates the pin 134, which moves the main rod 93 forward and releases the brakes on the reel stands 23, 23'.
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 rewinding lever 144 is rotated in the direction of the arrow X as shown in FIG. As shown in the figure, the reel stand 23 is rotated to perform a tape rewinding operation.

Although the pin 74 is actuated during the rewinding 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 the center position to obtain a fast-forward operation from the state before tape loading, the rotation operation is delayed because the lock pin 149 is engaged and held in the recess g. Even if you release your hand from 127, the operating state is maintained, and this rotating operation activates the pin 135, so the main rod 93 moves forward in the same way as when rewinding, and the brakes on the reel stands 23, 23' are released. The idler 34 is also 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 is that the tension means mounting arm 72 is The felt pad 8 is rotated in the opposite direction to the arrow shown in Figure 6.
The pressure of the magnetic tape 5 on the tape guide bar 79 is released.

That is, the tension means mounting arm 7 is connected by the pin 74.
2 is slightly rotated in the direction of arrow T against a spring (not shown) that biases it, so that the felt pad 80, which had pressed the magnetic tape 5 against the tape guide rod 79 during the tape loading operation, The tape is moved backwards so that it does not interfere with tape fast forwarding or 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 roller 20. Therefore, the running load on the magnetic tape 5 is small, and the tape is stably fed at high speed. In this case, since the magnetic tape 5 is in contact with each of the heads 9 to 12, it is possible to detect the cue signal recorded on the magnetic tape 5 by the cue head 10, and by detecting the cue signal, the magnetic tape 5 is Control such as automatic stopping 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 arrow T by pressing the stop button 22 shown in the figure. (Description of related mechanisms will be omitted) As shown in FIG.
By moving the drive rod 85 in the direction of the mark-lost mark against the above, the lock protrusion 90 unlocks the drive round bar 85, thereby unlocking the playback 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
64 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 causes the solenoid lever 155 to move to the ninth position. As shown in the figure (h)
The shaft 15 is connected to the board 1 from the position (i) to the position (i).
Rotates around 6 as a fulcrum.

A bent portion 157 formed on the solenoid lever 155 protrudes toward the surface through the hole ld of the substrate 1 and engages with a hook portion 158 of the sliding plate 151. Therefore, as the solenoid lever 155 rotates, the super-moving plate 151 moves from the position shown by the solid line in FIG. 9 to the position shown by the chain line, using the shaft 159 on the board 1 as a fulcrum. Note that this sliding plate 151
has long holes 151a at both ends. 151b is provided, and the sea bream 159 is fitted in the elongated hole 151a. A pin 150 is provided on the button lock plate 89, and this pin 1
50 is engaged with the elongated 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, the square hole 152 formed in the pose rod 117 and the protrusion 153 provided on the sliding plate 151 are engaged, and the pose rod 117 is
11, the sliding plate 151 follows and moves to the position shown in FIG. In the state shown in Fig. 11, Numatsuki board 1
The hook portion 158 of the solenoid lever 155 is disengaged from the bent portion 157 of the solenoid lever 155. Therefore, even if the solenoid 155 performs suction operation in this state, the sliding plate 151 does not rotate and the push button is unlocked. is not carried out. However, especially as shown in FIG.
The tip 160 of 55 can engage with a part of the push-on push-off latch plate 126 for latching in the pause state, and when the solenoid lever 155 is rotated by the suction operation of the solenoid 154, the push-on push The off-latch plate 126 is configured to move in the unlatching direction. As a result, when the solenoid 154 is sucked in the pause state, the latch in the pause state is first 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. When the stop button 22 is pressed in the pause state, the button lock plate 89 moves and the pin 150 rotates the sliding plate 151 to the chain line position in FIG. The green 1 of the sliding plate 151 is not engaged with the hook portion 158 of the sliding plate 151.
51c (see Fig. 11) and the solenoid 1
54 is rotated to the (j) position in the same manner as when it 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-forwarding or rewinding state, in addition to manually rotating the table-feeding/rewinding operation lever 127 to the stop position as described above, the suction operation of the solenoid 154 is also required during fast-forwarding or rewinding. The configuration is such that automatic stop is performed.

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 button release lever 138 is moved in the direction of the arrow as shown in FIG. It is in a rotated state. A selection lever 161 is connected to a part of the lock plate 141 so that it can be rotated about a shaft 162, and this selection lever 161 and the lock plate 14
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 support the tension pad release lever 138. Therefore, the selection lever 161 is rotated in accordance with the rotation of the tension 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, 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. In addition, the solenoid lever
155, it is possible to unlock the fast forward or rewind state by operating the stop button 22 in the fast forward or rewind state, as described above for unlocking during playback. It is possible to stop the fast forward or rewind state.

Next, the recording button 17 and its operational configuration will be described.
The drive ring 86 of the recording button 17 can engage with the lock protrusion 167 of the button lock plate 89, and the recording button 1
When 7 is pressed, the driving arm 86 moves forward and locks the lock protrusion 16.
7, and therefore the pressed state is locked by the lock protrusion 167.

In this case, a recording/playback enable switch (not shown) is switched in the same way 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 description, the present invention is capable of pulling out the magnetic tape from the cassette to a predetermined position by the loading operation of the loading means, and by rotating the reel stand by the unloading operation of the loading means. The tape is wound up and stored in the cassette, and when the magnetic tape is pulled out by this loading operation, the main rotating body that constitutes the reel stand, which rotates together with the claw engaged with the reel hub of the cassette, is moved through felt. The drive wheel that is in pressure contact with the felt is braked by the brake means to prevent it from rotating, and as a result, the magnetic tape that is being pulled out receives a tension force that causes the main rotating body to rotate against the frictional force of the pressure contact part of the felt. Since the magnetic tape is drawn out by following the movement of the tape drawing means reliably, the magnetic tape does not pop out and stable operation is performed.

Further, during the unloading operation of the loading means, the reel stand drive means rotates the drive wheel, and the reel stand is rotated in the winding direction so as to store the magnetic tape, so that the brake means escapes from the rotation of the drive wheel. The magnetic tape is easily rotated, and the tape unloading operation is carried out safely and reliably.Moreover, the non-rotational braking and rotational braking of the drive wheel during loading and unloading of the magnetic tape are This is automatically performed using one braking means, does not require any special braking selection mechanism, and therefore can perform stable magnetic tape loading and unloading operations with a simple configuration. Its practical value is great.

[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 aircraft section, and FIG.
The figure is a bottom view, FIG. 4 is a cross-sectional side view, FIG. 5 is a front view of 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. 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 main mechanism during playback operation, and FIG. 12 is a side view of the main part of the pose 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, 15...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, 5
6...Sector ring, 60...Loading idler~
65...-Pinch roller arm, 70...Rhombic opening/closing claw, 72...Tension means mounting arm "9
3... 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 patch release lever, 141...
...Lock plate, 149....・Lock pin, 14
4... Rewind lever, 154... Solenoid, 15
5... 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 containing a magnetic tape and having an open part at the front end and a notch extending over the upper and lower surfaces at the front end, the magnetic tape is pulled out from the open front part to the outside of the cassette, and the magnetic tape is installed outside the cassette. A magnetic recording/reproducing device in which a magnetic tape is brought into contact with a magnetic head provided with a magnetic tape, comprising a substrate, a reel stand that engages with a reel hub of the cassette when the cassette is mounted on the substrate, and a notch in the cassette. a tape pulling means that enters into the magnetic tape; a loading means that commands a loading operation and an unloading operation for pulling out and storing a magnetic tape from a cassette; and a reel stand driving means that rotates a reel stand by the unloading operation of the loading means; A brake means for applying a brake to a reel stand is provided, and the reel stand is interposed in pressure contact with a pawl that engages with a reel hub of a cassette, a main rotary body and a drive wheel that rotate together with the pawl, and the main rotary body and the drive wheel. The reel stand drive means and the brake means are related to the drive wheel, and the brake means brakes the rotation of the reel stand in the biting direction when the magnetic tape is pulled out. However, the rotation of the reel stand when storing the magnetic tape is braked in the escape direction, and when the cassette is attached, the loading means operates, and the tape pulling means is activated to pull the magnetic tape toward the brake means. The tape is pulled out to a predetermined position outside the cassette while rotating the main rotary body against the drive wheel braked by the drive wheel against the frictional force of the pressure contact portion of the felt. is moved backward, and the reel stand drive means is operated to rotate the drive wheel in the escape direction with respect to the brake means, thereby rotating the main rotating body to store the pulled out magnetic tape in the cassette. A magnetic recording/reproducing device characterized by comprising: