JPS6051170B2 - magnetic recording and reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for transferring magnetic tape stored in a reel-to-reel cassette through an opening 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 has the substrate 1 inserted into the holes 2a and 2b provided therein.
The reference pins 3 and 3' implanted in the base plate 1 are fitted to a predetermined position on the substrate 1. 4 and 4' are reel hubs housed in the cassette 2, on which a magnetic tape 5 is wound.

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 face of the cassette 2 is provided with rotatable lids 7, 7' for covering the front ends of the openings of the notches 6, 6', and these lids 7, 7' are always spring-loaded. When desired, the shafts 7a and 7a' are closed, respectively, as shown by the dashed lines.
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 head substrate mounting rod 95 embedded in the substrate 1 with screws at a position facing the front end of the cassette 2 of the substrate 1, and an erase head 9 and a cue head 10 are attached to the head substrate 8. , a recording head 11, and a playback head 12 are respectively attached, and tape guide rods 79, 79'' are attached respectively on the upstream and downstream sides of the magnetic tape 5 of each head.The button holder 14 is attached to the substrate. It is set in 1,
The button shaft 14a of the button holder 14 is rotatably provided with operation buttons such as a play button 15, a pause button 16, and a record button 11. 22 is a stop button.

Reference numeral 127 is a fast forward or rewind operating 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 inserted into the notch 6. 13 is a rotating shaft of a capstan motor 166. It is Capstan.

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

23 and 23'' are reel stands, which have the same configuration, and as shown in FIG. A supported 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 fitting part is fitted with a hexagonal hole, and the claw 29 is connected to the main rotating body 26.
It is designed to rotate in unison with the Also, nail 29
And the main episode! A spring 30 is interposed between the pawl 29 and the rolling body 26, and the pawl 29 is always urged upward by the 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 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 wheel 31 is transmitted to the main rotating body 26 by the frictional force of the felt 32. It is configured as follows. 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 are rotatable around support shafts 37 and 37'' implanted in the base plate 1, respectively, and brake arms 36 and 36''.
Brake shoes 38 and 3' are provided in a part of the brake shoes 38 and 3', respectively.

Furthermore, a tension spring 39 is tensioned between the brake arms 36, 36'' and is biased to rotate so as to pull each other. The force presses against the drive wheels 31 of the reel stands 23, 23'', thereby braking the reel stands 23, 23''. From the positional relationship of the reel stands 23, 23'' and the brake support/shafts 37, 37'', the rotational direction of the reel stand in the directions of arrows A and A'' is the direction of brake bite, and the direction of rotation as indicated by arrows A and I'' is is configured to be in the brake relief direction for rotation in the opposite direction.
The reference pins 3, 3'' have the same structure, and as shown in FIG. 12, one of the reference pins 3 is composed of a metal reference shaft portion 40 and a synthetic resin cassette receiving portion 41. The lower end of the part 40 is screwed or caulked to a predetermined part of the board 1, and the cassette receiving part 41 is fitted and fixed to the upper part of the shaft part 40, and the cassette 2 is attached to the tip of the cassette receiving part 41.
It has a tapered part 42 for making it easier to insert the cassette 2, and a collar 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 in which an operation lock plate 47 is rotatably supported is fitted into 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 l of the grooved cam 46 in the direction of the shaft 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 moves on the substrate 1 in the direction of arrow C and with reference to the guide shafts 50 and 51 implanted in the substrate 1. is provided so as to be slidable in the opposite direction, and has an engaging pin 53 that is engaged with the loading lever 52 in a part thereof. The loading lever 52 is rotatably provided on the board 1 with a shaft 54 as a fulcrum.
As 7 moves in the direction of arrow C, it rotates 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 an elongated hole 57 of the sector ring 56. The fan-shaped ring 56 is the reference shaft portion 40 of the reference pin 3.
The loading lever 52 is provided so as to be rotatable about the fulcrum.
The state shown in FIG. 2 is changed from the state shown in FIG.
Rotate counterclockwise to the state shown in the figure. Further, a long hole 58a of an idler arm 58 is fitted into the reference shaft portion 40, and the idler arm 58 is rotatable about the shaft portion 40 as a fulcrum and cannot slide in the two directions shown by the arrows in FIG. configured so that it is possible.

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 connected to the loading knob 1 by the tension spring 59.
It is energized in nine directions and is always in rolling contact with the circumferential surface 61 of the fan-shaped ring 56, and is configured to rotate as the fan-shaped ring 56 rotates. The idler arm 58 is also biased in the direction of the arrow by a tension spring 59 and is in contact with a pin 62 installed on the loading lever 52, so that the loading idler 60 normally drives the reel stand 23''. It is in a state where it is separated from the ring 31.

Then, when the loading lever 52 starts rotating in the direction of arrow H in FIG.
The idler arm 58 whose position was regulated by the second pin 62 rotates in the direction of the arrow due to the tension of the tension spring 59, and the loading idler 60 moves to the reel stand 23 while in rolling contact with the fan-shaped ring 56. When the loading lever 52 rotates in the direction of the arrow H, the fan-shaped wheel 56 rotates in the opposite direction to the arrow, and the idler 60
attempts to rotate clockwise and transmit the rotational force in the direction of arrow A'' to the reel stand 23'.However, the reel stand 23'
The direction of rotation indicated by arrow A'' in 3'' is the direction of biting into the brake shoe 3'', and the reel stand 23'' is strongly braked, and the direction of rotation of the fan-shaped ring 58 is in the direction of escape for the idler 60. Due to this direction, the idler 60 idles on the circumferential side 61 of the fan-shaped ring 56 without rotating the reel stand 23''. Further, as the rotation of the fan-shaped ring 56 approaches its end, the convex portion 63 provided on the fan-shaped ring 56 comes into contact with the idler arm 58 and rotates it in the direction opposite to the arrow, causing the loading idler 60 to reel. It is separated from the stand 23'' and stopped in the state shown in FIG.

Further, the pin 62 of the loading lever 52 is engaged with a long 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 embedded in a part of the pinch roller arm 65 which is rotatably supported by a shaft 68 embedded in the substrate 1. There is. 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. 1. As shown in FIGS. 2 and 6, when the loading lever 52 is rotated in the direction of arrow H, the tension spring 67 is stretched by the pin 62, and thereby the pinch roller arm 65 is rotated counterclockwise. Pinch roller arm drive rod 64
moves to the left θ.

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 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 65 rotates counterclockwise, the lid opening/closing claw 70 closes the lid 7 of the cassette 2.
1, and the lid 7'' is opened 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 the tension means attachment arm 12. The tensioning means mounting arm 72 is rotatably provided around a shaft 73 implanted in the substrate 1, and is normally biased to rotate in the direction of the arrow by a spring (not shown). Its rotation is prevented by. As the pin 71 escapes as the pinch roller arm 65 rotates counterclockwise, the tension means mounting arm 72 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 the arrow. It is configured to perform actions. The rotation of the tension means mounting arm 72 in the direction of the arrow is stopped by contacting a stopper pin 74 on a tension pad release lever 138, which will be described later. A lid opening/closing pawl 75 is provided at one end of the tension means mounting arm 72, and as the tension means mounting arm 72 rotates in the direction of the arrow, the lid opening/closing pawl 75 comes into contact with the lid 7 of the cassette 2. and open it to the position shown by the two-dot chain line in Figure 1. Furthermore, a tension arm 76 is rotatably mounted on the tension means mounting arm 72 between the shaft 73 and the lid opening/closing claw 75 by means of a support shaft 77. A shaft 78 is installed at one end of the tension arm 76, and a tension detection roller 2 is attached to the shaft 78.
1 is rotatably supported. Further, the tension arm 76 is provided with a tension arm 76 that presses the magnetic tape 5 against the tape guide rod 79 to prevent the magnetic tape 5 from running during recording or playback.
Felt pad 8 for applying back tension to
0 is attached. In the rotating direction of the tension means mounting arm 72 in the direction of the arrow, the outer peripheral surface of the tension detection roller 21 is located forward of the end surface of the four felt pads 80. Further, a spring hook 81 is provided at the other end of the tension arm 76.
A tension spring 82 that urges the tension arm 76 in a clockwise direction is stretched between the spring applied portion 81 and the spring applied portion 72a of the tension means attachment arm 72 in order to generate a pressing force of the felt pad 80. There is. 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. has been stopped. The above is the configuration of the tape loading mechanism, and a series of tape loading and unloading operations will now be explained based on this configuration. From the stopped state shown in Fig. 2, turn the loading knob 19 in the loading direction (
7), the operation lock plate 47 moves in the direction of arrow C; and the loading lever 52 also rotates in the direction of arrow H. Along with this, the idler 60 makes contact with the reel stand 23'', but
Since the reel stand 23'' is braked, it does not rotate, and further, due to the rotation of the loading lever 52, the idler 60 is separated from the reel stand 23''.
It is stopped in that separated state. On the other hand, loading lever 5
2, the pinch roller arm 65 rotates counterclockwise, and the lid 7'' of the cassette 2 is opened by the lid opening/closing claw 70 of the pinch roller arm 65. At the same time, the lid 7'' of the cassette 2 is opened. The magnetic tape 5 is pulled out to a predetermined position by the pinch roller 20 located in the notch 65. At this time, the reel stand 23'' is braked, but the magnetic tape is held at the pressure contact portion of the felt 32 shown in FIG. The main rotating body 26 is rotated against the frictional force of . The pinch roller arm 65 is connected to the pinch roller drive pin 6 when the pinch roller 20 rotates to the front of the capstan 13.
6 is the stopper part 113 of the stop lever 84 in FIG.
Rotation stops when it comes into contact with. Further, as the pinch roller arm 65 rotates, the tension means mounting arm is rotated in the direction of the arrow, and the lid opening/closing claw 75 opens the cassette 2.
When the lid 7 is opened, the tension detection roller 21
contacts 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 bar 79, and then the felt pad 80 contacts the magnetic tape 5, and the felt pad 80 presses the magnetic tape 5 against the tape guide bar 79. Ru. 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-unloaded state. In other words, 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 by 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 Ho in FIG. 2, and the fan-shaped ring 56 is also rotated in the opposite direction to the arrow Ho.

As a result, the loading idler 60 comes into rolling contact with the fan-shaped ring 56 and the reel stand 23'', and the loading idler 60 rotates counterclockwise. stand 23
Transmits rotational force in the opposite direction to arrow A. The rotation of the reel stand 23'' in the opposite direction to the arrow A'' is the 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''. 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 reel stand 23'' and the rotation amount for actually storing the magnetic tape 5 is determined by the difference between the loading idler 60 and the drive wheel 31 of the reel stand 23''. This is absorbed by slippage occurring between the felt 32 or between the drive wheel 31 and the main rotating body 26. Further, during loading, the outer edge 49 of the loading cam 44 comes into contact with the cam follower 48, and moves the cam follower 48 by the stroke e; however, during unloading, the inner edge 49'' of the loading cam 44 contacts the cam follower 48. comes into contact with the cam follower 48 and returns the cam follower 48 by the stroke '.The reference numeral 115 shown in FIG. When moved, it engages with a detent groove 116 or 116'' provided on its outer circumferential surface, thereby positioning and holding 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 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 fitted into the horizontal hole 7 portion 47a1 of the L-shaped hole 47a formed in the operation lock plate 47. Since the drive rod 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 goes for the recording button 17, whose driving round rod 86 is fitted into the L-shaped hole 47b of the operation lock plate 47, as shown in FIG. It is also impossible to operate.
When tape loading is performed, as the operation lock plate 47 moves in the direction of arrow C as shown in FIG. Both playback and recording operations are possible.

After loading the tape, by pressing the play button 15, the driving rod 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 direction of the arrow N shown in the figure, and is stretched between this and the button holder 14.
It is urged to slide in the direction of arrow R, and its biased movement is prevented by driving round rods 85, 86 and the like. As the drive round rod 85 moves in the direction indicated by 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 93a in the head board mounting rod 95.
, 93b are guided and slid in the direction of arrow A. At the other end of the main rod 93 are brake arms 36, 36.
A protrusion 96 that comes into contact with a part of `` is provided.

As the main rod 93 moves forward, the protrusion 96 releases the tension spring 3.
In order to rotate the brake arm 36'' clockwise and the brake arm 36'' counterclockwise against the brake force 9, the brake shoes 38, 3'' are separated from the reel stands 23, 23''.Furthermore, the idler 34 is idler arm 9
The idler arm 98 is rotatably supported on a shaft 97 implanted in the substrate 1. A shaft 101 on an arm 100 rotatably supported on a shaft 99 provided therein.
It is rotatably supported using the fulcrum as a 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 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. Idler 34 when in stop position 4 shown in
is moved in the direction opposite to the direction of the arrow so that the shaft 97 is aligned with the substrate 1.
The idler 34 is held in a position where it does not come into contact with either the motor pulley 105 of the reel motor 106 attached to the base plate 1 or the reel stands 23, 23''. 15 is operated and the main rod 93 is moved in the direction of the arrow, the brake shoes 38, 3' move to the reel stands 32, 3 as described above.
2'' and the idler arm 98 is released, the idler 34 is brought into rolling contact with both the ribbon pulley 1J105 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 the motor pulley 105 of the reel motor 106 rotates clockwise.
3'', this reel stand 23'' is rotated in the opposite direction of arrow A, and the capstan 13 and pinch roller 2 are rotated.
The magnetic tape 5 sent out by 0 is wound up. moreover,
The driving round rod 85 passes through the base plate 1 and is inserted into the hole 1 of the play rod 107 (see FIG. 10) arranged on the back side of the base plate 1.
07a, so that when the play button 15 is operated, the play rod 107 is slid in the direction indicated by the arrow using guide shafts 114, 114'' implanted in the base plate 1 as guides. As shown in FIG. 3, the stop lever 84 is rotatably supported by a shaft 108 embedded in the substrate 1, and this stop lever 84 is
09, and 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 implanted in the board 1. It comes into contact with a stopper 112 to prevent its rotation. Further, a stopper portion 113 is provided on a part of the stop lever 84, and is adapted to restrict the rotational position of the pinch roller 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 at position a, and as tape loading is performed, the pinch roller drive pin 66 reaches position b as the pinch roller arm 65 rotates. When the pinch roller drive pin 66 is
13, and the rotation of the pinch roller arm 65 is stopped. After that, as shown in FIG.
When the stop lever 84 rotates counterclockwise with the protrusion 110 against the tension spring 111 due to movement in the direction of the arrow, the pinch roller drive pin 66 is further rotated by the tension spring 67. To do this, the pinch roller 20 comes into contact with the capstan 13, and like 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, and therefore the capstan 13 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 80. To explain the above-mentioned playback operation sequentially, first, by pressing the play button 15, the drive rod 86 is locked by the lock protrusion 90 of the button lock plate 89, and the main rod 93 moves forward. The brake that was braking the reel stands 23, 23'' is released.

Furthermore, the idler 34 connects the motor pulley 105 and the reel stand 2.
32, and transmits the rotational force of the reel motor 106 to the reel stand 23''.Furthermore, 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 was 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 onto the reel hub 4''. The magnetic tape 5 is first guided from the upstream side by the tension detection roller 21, 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,
When the pause button 16 is pressed, the drive rod 88 engages with the hole 117a, and the pause rod 117 moves in the direction of the arrow, that is, from the state shown in FIG. 2 against the tension spring 170 to the state shown in FIG. Moving. This port 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 11
8 is engaged with a cam follower 119. The cam follower 119 is attached to one end of the pause cam lever 120, and the pause cam lever 120 is attached to the shaft 1 on the board 1.
It is rotatably supported around 21 as a fulcrum. The other end 122 of the pause cam lever 120 is connected to the pinch roller arm 6.
It is configured to be able to engage with the pin 71 of No. 5. 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 rotates in the direction of the arrow force as shown in FIG. 11, and the other end 122 contacts the pin 71 of the pinch roller arm 65, causing the pinch roller arm 65 to rotate in the direction of the arrow Y. As a result, Capstan 13
The pinch roller 20 that was pressed against the capstan 13
This pinch roller 20 and capstan 13 are separated from each other.
The tape running drive caused by this 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 turned off by the pause rod. When ribose is performed by moving 117, the power of reel motor 106 is turned 0FF.
Therefore, 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 pressure contact with 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. . Here, as a method for blocking the winding force of the reel stand 23'' during the pause, a method has been described in which the power of the reel motor 106 is turned off.
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 106 when the switch 123 detects the movement of the pause rod 117, so that the winding force by the reel stand θ2'' can be fully applied during the pause operation. By applying a low torque, ie, a winding force smaller than the back tensioner of the magnetic tape 5, to the reel stand 23'' without breaking the magnetic tape 5, 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 sagging of the saw layer. 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 1a of the substrate 1, and a latch pin 125 is implanted in the bent portion 124. As shown in FIG. 12, by pressing the pause button 16 and moving the pause rod 117 from the state shown by the solid line to the state shown by the two-dot chain line, the latch pin 125 is latched into engagement with the bush-on-bush-off latch plate 126. Ru. This bush-on-bush-off latch plate 126 is rotatably provided on an angle 127 provided on the base plate 1. This bush-on-bush-off latch plate 126 has a configuration widely used in general magnetic tape devices and the like, and a detailed explanation of its configuration and invention will be omitted here. As described above, by pressing the pause button 16, the pinch roller 20 is separated from the capstan 13 and the pause rod 117 is latched, and by pressing the pause button again, the latch is released and the playback state is returned. Return.

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) implanted in the substrate 1 as a fulcrum.

Rotate this fast forward/rewind operating lever 127 to the R position. When it is rotated to the F position, it is in a rewinding state, and when it is rotated to the F position, it is in a fast forwarding state. The fast forward/rewind operation lever 127 is provided with a T-shaped groove 129, and the drive round bar 85 of the play button 15 is inserted into this T-shaped groove 129! ing. In the stopped state, the drive round bar 8
5 is located at the central intersection of the T-shaped grooves 129 as shown in FIG.
29 into the vertical groove 129a. Therefore, in the playback state shown in FIG.
7, the wall 130 or 131 of the T-shaped groove 129 comes into contact with the driving bar 85, and therefore fast forwarding or rewinding operations are impossible from the playback state.

As shown in FIG. 3, in the stopped state, the drive round rod 85
T-shaped groove 129 without contacting 0 or 131
Since it is movable in the horizontal groove 129b of the
Rewind operation is possible. Furthermore, by performing fast-forwarding and rewinding operations, the driving round bar 85 is fitted into the horizontal groove 129b of the T-shaped groove 129 as shown in FIG. 13, so even if the play button 15 is pressed in this state, Drive round rod 8
5 is in contact with the wall 132, and therefore playback operations are not possible in fast forward or rewind states. A recess 133 is provided in a part of the fast-forward/rewind operating lever 127, and is implanted in the main rod 93.
Driving edges 136, 137 are provided that can engage pins 134, 135 that protrude to the back surface through 1c.

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 edge 136 is moved as shown in FIG.
contacts the pin 134 of the main rod 93, and the main rod 93 moves in the direction of the arrow. In addition, this also has a fast forward/rewind operation lever 127 for fast forwarding operation.
By rotating the drive edge 137 to the F position, the drive edge 137
contacts the pin 135, and the main rod 93 moves in the direction of the arrow. The tension pad release lever 138 is rotatably provided around a shaft 139 implanted in the base plate 1, and a pin 74 implanted in a portion of the lever 138
is passed through the hole 1d of the substrate 1 to the front side, and the sixth
As shown in the figure, it is provided so as to engage with a portion of the tension means mounting arm 72 which is rotated in the direction of the arrow. The pin 74 in the stopped state is inserted into the recess 133 of the fast forward/rewind operating lever 127 as shown in FIG.
As shown in FIG.
It is brought into contact with the edge 127a of 27. Further, in the fast-forward state, the 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 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 slidable in the direction of the arrow mark with elongated holes guided by the guide shafts 142a and 142b implanted in the holder 140 and the shaft 128, and is always tensioned between it 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 149 implanted in the fast forward/winding/return operation lever 127 is engaged with the recess f to maintain its position, and when the rewind operation is performed, the lock pin 149 is moved into the recess e. The lock pin 149 is engaged and maintained in its operating state, and by further performing a fast forward operation, the lock pin 149 is engaged with the recess g and its operating state is maintained. The fast forward/rewind operation lever 127 held in this manner returns to the stopped state by manually rotating it to the stop position to release each lock, and this also causes the lock plate 141 to move in the direction of the arrow The lock is also released 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 inclined edge 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 supply reel stand 23 during playback or fast forwarding. . 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 X in accordance with the rotation of the fast forward/rewind operation lever 127. This rotation of the rewinding lever 144 causes the leaf spring 148 to come into contact with the shaft 97 of the idler 34, forcibly moving the idler 34 in the direction of the reel stand 23 against the tension spring 102. Let them come into contact with you. On the other hand, a switch (not shown) is provided that is 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. motor pulley 1 during rewinding operation.
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 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, 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 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 relation at all since the tension means mounting arm 72 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 if you release your hand, the operation state 7 is maintained, and this rotation operation causes the pin 135 to
is operated, the main rod 93 moves forward in the same way as when rewinding, and the brakes on the reel stands 23, 23'' are released.
Further, the idler 34 is pressed against the motor pulley 105.
9 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, this idler 34 is pulled by the tension spring 102 and rolls into contact with the reel stand 23'', so that the reel The table 23'' is rotated to perform a tape fast forwarding operation. Although the ping 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 operations are 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 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 rod 79 by the magnetic tape 5 is released.

That is, the tension means mounting arm 7 is connected by the pin 74.
2 is slightly rotated in the direction of the arrow against the spring (not shown) that biases it, so the felt pad 80, which had been pressing the magnetic tape 5 against the tape guide rod 79 during the tape loading operation, retreats. The tape is designed so that there is no problem in fast-forwarding or rewinding the tape.

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. Further, in this case, the magnetic tape 5 is
12, it is possible to detect the cue signal recorded on the magnetic tape 5 by the cue head 10, and control such as automatically stopping the magnetic tape 5 can be performed by detecting the cue signal. It is something. 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 switched to fast forward and increases during rewinding, so that the winding torque in each mode becomes the most optimal torque. It is set to .

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 bar 85 in the direction of the arrow T against this, the lock protrusion 90 unlocks the driving 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 a solenoid 154 attached to the back side of the substrate 1), and the solenoid 154 is activated. (The method of detecting the end is a known technique and will not be described again.) 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. It rotates about the shaft 156 implanted in the substrate 1 as a fulcrum from the position h shown in FIG. 9 to the position i.

A bent portion 157 formed on the solenoid lever 155 projects to the surface through the hole 1d of the substrate 1 and engages with a hook portion 158 of the sliding plate 151. Therefore, as the solenoid lever 155 rotates, the sliding 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. Note that this sliding plate 151
Long holes 151a and 151b are provided at both ends of the shaft, and the shaft 159 is fitted into the long holes 151a. A pin 150 is implanted in 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. It is done. 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.
11, the sliding plate 151 follows and moves to the position shown in FIG. In this state shown in FIG. 11, the sliding plate 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 not locked. No cancellation will take place. However, especially as shown in FIG.
The tip 160 of 55 can engage with a part of the bush-on-bush-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 above-mentioned bush-on It is configured to move the bush-off latch plate 126 in the unlatching and unlatching directions. As a result, when the solenoid 154 is sucked in the pause state, the latch holding of the pause state is first released, and the operation mode is returned to the playback state or recording state. Thereafter, 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. In addition, when the stop button 22 is pressed in the pause state, the sliding plate 15 is moved by the pin 150 due to the movement of the button lock plate 89.
1 is rotated to the chain line position in FIG.
The solenoid 154 is rotated to the i position in the same manner as when the solenoid 154 is activated by being pressed by the edge 151c (see FIG. 11), 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 operation lever 127 to the stop position as described above, the absorbing action 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 moves in the direction indicated by the arrow in FIG. It is in a state where it is rotated in the direction. 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 levers 16 and 41.
1 bent portion 163 is the tension pad release lever 138
It is provided so that it always comes into contact with the tip of the Therefore, the selection lever 161 is rotated in accordance with the rotation of the tension pad release lever 138, and the tip of the selection lever 161 is connected to the arm 16 of the solenoid lever 155 as shown in FIG.
It is brought to a position where it can engage with the tip end of No. 5. Therefore, when the solenoid 154 is sucked while a fast forward or rewind operation is being performed, 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. let

As the selection lever 161 moves, the lock plate 14
1 moves in the direction of arrow D, the lock pin 149 is unlocked by the recess e or g, and the fast forward/rewind operating lever 127 automatically returns to the stop position by the return force of the main rod 93 and the like. Note that the fast-forward or rewind state can be unlocked 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 fast forwarding or rewinding state by doing so.

Next, the recording button 17 and its operational configuration will be described.
The drive round bar 86 of the recording button 17 can engage with the lock protrusion 167 of the button lock plate 89, and when the record button 17 is pressed, the drive round bar 86 moves forward and locks the lock protrusion 1.
67, and therefore its pressed state is locked by the lock protrusion 167.

In this case, the recording/playback selector switch (not shown) is turned on, as in a general device, to enable recording.
By simultaneously pressing the play button 15, the magnetic tape 5 is driven and a recording operation is performed. As is clear from the above embodiments, the present invention is an apparatus in which a magnetic tape is pulled out from a cassette to perform a playback operation, and the playback operation can only be performed after the magnetic tape is pulled out by the loading means. On the other hand, high-speed tape running operation is possible both before and after loading the magnetic tape, which not only prevents malfunctions such as playback operations occurring before tape loading. The high-speed tape running operation is possible even before the tape is loaded, that is, even when the tape running load is small when it is stored in the magnetic tape cartridge set.
In addition, high-speed running is possible after loading the tape, that is, before starting playback or immediately after the end of the playback operation.Especially when running at high speed before loading the tape, the tape running load is small, so this system uses batteries as a power source. It is ideal for seeding devices and has great practical value.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a top view of the cassette installed, FIG. 2 is a top view of the mechanism, and FIG.
4 is a cross-sectional side view of the same, FIG. 5 is a front view showing the head block section, FIG. 6 is a top view for explaining the operation of the tape mechanism section, and FIG. 7 is a loading cam section. 8 is a partially sectional side view of the reel stand, FIG. 9 is a top view of the main mechanism of the reproducing operation, and FIG. 10 is the same during the reproducing operation.
Fig. 11 is a top view of the main mechanism during pose operation, Fig. 12 is a side view of the main part of the pose operation mechanism,
FIG. 13 is a bottom view of the main mechanism in a rewinding 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 roller, 2
2...Stop button, 23,23''...Reel stand, 34...Idler, 36,36''...
・Brake arm, 44... Loading cam, 47... Operation lock plate, 52... Loading lever, 56... Fan-shaped ring, 60...
・Loading idler, 65...Zench 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...Bush-on-bush-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.

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 from the front end open part to the outside of the cassette to drive the tape. The magnetic recording and reproducing device is configured to include a substrate, a first tape pulling means that enters into one notch of the cassette when a cassette is mounted on the substrate, and a first tape pulling means that enters one notch of the cassette and another notch of the cassette. a tape loading means for instructing a tape loading operation for activating the second tape withdrawing means and the first and second tape withdrawing means to withdraw the magnetic tape from the cassette to a predetermined position outside the cassette; a tape constant speed running drive means including a playback operation member and a capstan for causing the magnetic tape to run at a constant speed by operating the playback operation member;
A control means for locking the operation of the tape constant speed running drive means to make it inoperable or releasing the lock to make it operable, a tape high speed feed operation member, and a magnetic tape by operating the tape high speed feed operation member. The control means is associated with the tape loading means to drive the tape at a constant speed by the playback operation member in a state before the tape loading means is activated. operation of the tape constant speed drive means is disabled and operation of the tape constant speed drive means is enabled after the operation of the tape loading means, while the operation of the tape high speed drive means is independent of the operation of the tape loading means. A magnetic recording/reproducing device characterized in that the device can be configured by operating an operating member.