JPS6127831B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording and reproducing device.

Conventionally, in devices that use a dedicated drive motor as a means for loading and storing tapes, a switch is used to control the forward rotation, reverse rotation, stop, etc. of the motor, which is activated by the operation of the recording/playback button. 1 switch, 1 switch that is activated by operating the stop operation button, and 2 switches that are activated by detecting the completion of tape loading and storage states, totaling 4. I needed a piece. In addition to requiring mechanical parts to operate these switches, the wiring becomes complicated, and man-hours are required for the installation and adjustment of the switches, and problems such as misaligned adjustment of the switch installation position, broken wiring, etc. There was a risk of failure, which lowered the reliability of the product.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic recording and reproducing apparatus in which the number of switches for reversible rotation motors for tape loading and storage is reduced, and the mechanism and circuitry are simplified.

The present invention includes two switches for forward rotation and reverse rotation, which are attached to a motor circuit capable of forward and reverse rotation,
The apparatus is provided with a means for closing each of the above-mentioned switches by a slider driven by recording/reproduction and operation of a switch button, and an opening means for opening the switch closed by the closing means after a predetermined period of time.

An embodiment of the magnetic recording/reproducing apparatus of the present invention will be described below with reference to FIGS. 1 to 11. First, in FIG. 1, there are reel shafts 9a and 10 on the base 1.
a is upright, and a take-up reel stand 9 and a supply reel stand 10 are rotatably attached, respectively.
The guide base 11 is mounted parallel to the base base 1 by a support on the base base 1, and on the guide base 1 there are tape guide pins 13, 14, an erasing head 15,
Rollers 16, 17, an audio control head 18, and a tape guide pin 19 are attached. Also, the capstan 21 is the flywheel 4
3 (see Figure 2), and the pinch roller 22
is rotatably supported on a pinch roller arm 23 rotatably attached to a shaft 23a on the base 1. 24, 24' are guide mounting base members (see also FIG. 6), and correction posts 26, 26', which are guides for guiding and regulating the magnetic tape 42, and cylindrical guide bodies 27, 27' are attached, and the cassette 5
The magnetic tape 42 in the magnetic tape 4 is wound around a rotary head cylinder 12 provided at an angle with respect to the drawer base 1. In this case, the movement is carried out by arc-shaped grooves 11a, 11 formed in the guide base 11.
b, and its position is regulated by locking members 41, 41' during recording and reproduction. The correction posts 26, 26' are tilted to guide mounting bases 25, 25' (see FIGS. 2, 4, and 6) that are rotatable around the cylindrical guides 27, 27', respectively. It has been planted. An arm 78 has a tape guide pin 74 planted at one end, is rotatable around a shaft 78a on the base base 1, and is adapted to be interlocked during recording and playback. One end of a band member 76, which is attached through the supply reel stand 10 and wound approximately semicircularly around the supply reel stand 10, is rotatably supported by a pin 78b. Note that the other end of the band member 76 is fixed to the basic base 1 with a screw 77.

In FIGS. 2 and 3, 29 is a motor for loading and unloading operations, and the base 1
A motor pulley 30 is fixed to the motor shaft. A shaft 31a of a pulley 31 driven by a motor pulley 30 via a belt 32 is supported by the base 1, and a worm 33 is further fixed integrally therewith. On the other hand, a worm 33 is placed on the base 1.
A rotating body consisting of worm gears 34 and 34' that are engaged with each other and rotate in opposite directions is connected to shafts 34b and 34.
b', and pins 34a, 34a' are installed in the worm gears 34, 34', respectively. 36, 37, 38 and 36', 3
7' and 38' are link members with two pins 3 each.
7', 38' (the link members 36, 37, 38 sides are not shown), and are rotatably connected by pins 36a,
36a' and pins 34a, 34a' set on the worm gears 34, 34' are connected by springs 35, 35', and arcuate guide grooves are provided inside the worms 34, 34'. (not shown) are formed so that the springs 35, 35' and the pins 36a, 36a' are accommodated and guided. In addition, pin 3
7a', 38a' and the opposite pin and link member 3
Pins 39, 39' planted on the other end of 8, 38'
(see FIG. 6), the protruding portions toward the base 1 side are approximately arcuate grooves 11a, 11b of the guide base 11 on the base base 1, as shown in FIGS. 2 and 6.
The guide members 40, 40' are engaged with U-shaped grooves 40a, 40a' formed along the guide members 40, 40', and the locus of movement is regulated. Further, the protruding portions of the pins 39, 39' toward the guide base 11 side correspond to the protruding portions 24b, 24 of the guide mounting base members 24, 24' on the guide base 11.
connected to b′.

Next, the drive means for pinch roller crimping will be explained with reference to FIG. The loading arm 44 is the base 1
It is rotatably attached to the upper shaft 44a, and one end is rotatably attached to the arm 45 by a pin 46. The arm 45 has its center portion rotatably connected to one end of each of the arms 47 and 48 by a connecting pin 49, and the other end connected to the end of a bracket 52 on the base 1 via a tension spring 53. There is. On the other hand, each other end of the arms 47, 48 has a pin 47a,
48a is planted, the pin 47a is engaged with a hole provided in the pinch roller arm 23, and the pin 48a is provided at one end of an arm 50 rotatably attached to a shaft 50a on the base 1. is engaged with the hole. Further, a tension spring 51 is connected between the other end of the arm 50 and the bracket 52 on the base 1.
is stretched and the bent portion 50b of the arm 50
is located in a hole 1a provided in the base 1, and its position is regulated. The arm 70 shown in FIG.
It is rotatably mounted on a shaft 70a, and a pin 23b on the pinch roller arm 23 is engaged with an elongated hole provided at one end. On the other hand, a take-up roller 71 is driven by pressing the take-up reel stand 9 against a spring 72, and is pivotally supported on an arm (not shown) provided with pins 71a and 71b. pin 71
The pin 71a extends to a height where it comes into contact with the arm 70, and the pin 71a is for restricting the movement of the arm along a guide groove provided on the base.

Further, 2 is a pause button, 3 is a stop button, 4 is a fast forward button, 5 is a playback button, 6 is a rewind button, 7 is a record button, and 8 is an after-recording button. Reference numeral 59 denotes a slider, which is attached to be slidable left and right on the base 1 in conjunction with the operation of the playback button 5 and the record button 7, and the other end is an arm rotatably attached to a shaft 60a on the base 1. 60 is engaged. And arm 60
A pin 60b planted at the other end engages with an arm 61 rotatably attached to a shaft 61a fixed on the base 1. In FIG. 2, the slider 62 is slidably mounted while being guided by guide holes 62a, 62b and a guide pin on the base 1, and the elongated hole 62d engages with a pin 61b set on the arm 61. There is. Further, a tension spring 58 is stretched between the slider 62 and the base 1. The switch board 63 is fixed on the base 1 with a bracket 66, and the switches 64, 6
5 is installed. Switches 64 and 65 are provided on the circuit connecting the motor 29 and the power source. When the switch 64 is closed, the motor 29 rotates counterclockwise in FIG. 3, and when the switch 65 is closed, the motor 29 rotates clockwise. It is configured as follows.

In FIGS. 8 to 11, the switch levers 67, 67' are rotatably attached to a shaft 73 on the basic base 1, and are formed in the same shape.
actuators 64a and 65a of switches 64 and 65, respectively.
switch lever 6.
A tension spring 68 is stretched between 7 and 67', and the tapered portions 67a and 67a' are configured to abut against the rising portions 62c and 62e of the slider 62, respectively. Further, the arm 69 is rotatably attached to the base 1 on a shaft 69a. On the other hand, pin 3 is attached to the worm gears 34 and 34'.
4c and 34c' are planted respectively, and pin 3
4c' is at a height such that it can come into contact with the straight portion 44b of the loading arm 44 and the tapered portion 69b of the arm 69, respectively. Further, the pin 34c is at a height such that it can come into contact with the bent portions 11c and 11d of the guide base 11.

In the above device, when the playback button 5 or the record button 7 is pressed, the slider 59 moves to the right on the base 1 in FIG.
is driven counterclockwise around a. Along with this, the arm 61 is driven via the pin 60b and the shaft 6
1a in the clockwise direction, and in FIG. 2, the pin 61b of the arm 61 pushes the slider 62 against the biasing force of the tension spring 58. At this time, as shown in FIG. 8, the rising portion 62c of the slider 62 pushes the tapered portion 67a' of the switch lever 67' and
The switch lever 67' is rotated clockwise around the tension spring 6.
8, the tapered portion 67a is rotated clockwise around the shaft 73 while contacting the rising portion 62e of the slider 62. Therefore, the switch lever 67 is the actuator 64 of the switch 64.
Since the switch 64 is turned on by pressing a, the motor 29 is energized and starts rotating counterclockwise in FIG. 3. At this time, the play button 5 or the record button 7 is kept pressed by a button lock mechanism (not shown).

As the motor 29 rotates, the pulley 31 is rotated by the belt 32 along with the shaft 31a, so the coaxial worm 33 rotates, the worm gear 34 rotates clockwise around the shaft 34b, and the worm gear 34' rotates clockwise around the shaft 34b. Start rotating counterclockwise around ′. Therefore, the link members 36, 37, 38 and 36', 37', 38' are attracted via the springs 35, 35', and the terminal pins 39, 39' are attracted to the guide member 40 formed on the basic base 1. ,40'U
It begins to move along the shape grooves 40a, 40a'. On the other hand, as shown in FIG. 6, the protrusions 24b, 24b' of the guide mounting base members 24, 24' placed on the guide base 11 are engaged with the pins 39, 39'. As the pins 39, 39' move, the correction posts 26, 26' placed on the guide mounting base members 24, 24' and the cylindrical guide body 2
7, 27' from the position shown in FIG.
The magnetic tape 42 in the guide base 11 is pulled out from two locations and begins to move along the grooves 11a and 11b formed in the guide base 11.

Further, by operating the playback button 5 or the record button 7, the arm 78 can be rotated counterclockwise around the shaft 78a by the tension spring 75, and furthermore, the guide mounting base members 24, 24' can be moved. The magnetic tape 4 is rotated to the position shown in FIG.
2 and the supply side reel 10.
The belt-shaped member 76 provides the necessary braking force during recording and reproduction. As the above-mentioned operation progresses, the state shown in FIG. 5 will be reached, and the guide mounting base members 24, 24' will come into contact with the locking members 41, 41', and their positions will be regulated. At this time, link members 36, 37, 38 and 36', 37', 38'
is wound into an annular shape by worm gears 34, 34'. Further, the magnetic tape 42 passes through the tape guide pins 13, 74, 14 to the erase head 15,
It contacts the roller 16, passes through a cylindrical guide 27 and a correction post 26, and is wound around the rotary head cylinder 12 at a predetermined angle, and further contacts the roller 17 and the audio control head 18 via a correction post 26' and a cylindrical guide 27'. , tape guide pin 19,
It reaches the inside of the cassette 54 via the capstan 21. Further, as the rotation of the motor 29 progresses, the springs 35, 35' in the worm gears 34, 34' begin to deform as the guide mounting base members 24, 24' are stopped by the locking members 41, 41'. The force causes the guide mount members 24, 24' to begin to press against the locking members 41, 41'. At this time, as shown in FIG. 9, the pin 34c' mounted on the worm gear 34' comes into contact with the loading arm 44 and is rotated clockwise about the shaft 44a. Therefore, the arm 45 is pulled against the biasing force of the tension spring 53, and the arm 45 is pulled against the biasing force of the tension spring 53.
The pinch roller 23 rotates counterclockwise about the shaft 23a so that the angle at which the angles 7 and 48 intersect approaches approximately 180 degrees, and eventually the pinch roller 22 comes into contact with the capstan 21.

When the rotation of the worm gear 34' further progresses from this state and the rotation of the arm 45 progresses, the arm 50 rotates clockwise around the shaft 50a and the tension spring 51
is stretched slightly, the pinch roller 22 presses the magnetic tape 42 against the capstan 21, and the magnetic tape 42 is driven at a constant speed. At the same time, the arm 70 in FIG.
is due to the displacement of the pinch roller 23 mentioned above.
3b and rotated clockwise around the shaft 70a, the take-up roller 71 separates from the pin 71a and moves toward the take-up reel stand 9 by the biasing force of the spring 72, and the take-up reel stand 9 is driven by pressure contact. At this time, as shown in FIG. 9, the loading arm 44 pushes the protruding piece 67b of the switch lever 67 with its corner 44c and rotates the switch 67' counterclockwise around the shaft 73.
The pressure on the actuator 64a is released, the switch 64 is turned off, and power supply to the motor 29 is stopped. However, since the drive system from the motor 29 normally has inertia, the worm gears 34, 3
4' tries to rotate a little further, but if there is excessive inertia, the pin 34c installed in the worm gear 34 comes into contact with the cut portion 11d of the guide base 11, as shown in FIG. The amount of rotation is limited by Also,
Even if the switch 64 is turned off by the loading arm 44 and the rotation of the motor 29 is stopped, the drive system will not reverse because of the large reduction ratio engagement between the worm 33 and the worm gears 34 and 34'. The recording or reproducing states shown in FIGS. 5 and 9 can be maintained.

Further, when the stop button 3 in FIG. 1 is pressed in order to release the above-mentioned recording or reproducing state, a button lock mechanism (not shown) is activated and the replay button 5 or the record button 7 is unlocked. Therefore, slider 5
9. Since the arms 60 and 61 are released, the slider 62 is returned by the biasing force of the tension spring 58 as shown in FIG. 2, and the arm 61 is rotated counterclockwise.
0 is rotationally displaced clockwise. On the other hand, as the rising portion 62c of the slider 62 moves backward in FIG.
3 in the counterclockwise direction and presses the actuator 65a of the switch 65 to turn on the motor 2.
9 starts clockwise rotation. At this time, the rising portion 62e of the slider 62 is connected to the switch lever 6.
It has retreated to a position where it almost abuts against the taper portion 67a of No.7. The worm gears 34, 34' are the motor 29
is driven via the belt 32, pulley 31, and worm 33, and the worm gear 34 rotates counterclockwise and the worm gear 34' rotates clockwise. Therefore, as the pin 34c' moves, the loading arm 44 is rotated counterclockwise by the force of the tension spring 53, and the bent portion 50b is locked in the hole 1a provided in the base 1. As the loading arm 44 further rotates, the pinch roller 22
The pressure on the capstan 21 is released, the arms 47 and 48 continue to bend, and the pinch roller 2
2 separates from the capstan 21, and at the same time, the pressure drive of the take-up roller 71 against the take-up reel stand 9 is also released, and the connecting pin 49 eventually connects to the semicircular portion 5 of the arm 50.
It comes into contact with 0c and stops moving.

After the drive of the magnetic tape 42 is released in this way, the springs 35, 35' of the worm gears 34, 34' return to their original displacements, and the guide mounting base members 24, 2
The pressure on the locking members 41, 41' of 4' is released, and the link members 36, 37, 38, 3
6', 37', 78', the guide mounting base members 24, 24' move in the groove 11 of the guide base 11.
a, retreat along 11b. At this time, the take-up side reel stand 9 and the supply side reel stand 10 are connected to the take-up roller 7.
The magnetic tape 42 pulled out of the cassette 54 can be wound up by a winding mechanism (not shown) separate from the magnetic tape 1. On the other hand, the arm 78 is displaced somewhat due to the rotational force applied in the clockwise direction by the operation of the stop button 3, but is eventually pushed by the rear part of the guide mounting base member 24 that has retreated, and the arm 78 is pressed against the tape. The guide pin 74 is displaced to the position within the cassette 54, and the braking of the strip member 76 to the supply reel stand 10 is also released. When the guide mount members 24, 24' are returned to the position where the correction posts 26, 26' and the cylindrical guide bodies 27, 27' are located within the cassette 54, as shown in FIG. 34c' is the tapered portion 69b of the arm 69 as shown in FIG.
Press to rotate the arm 69 counterclockwise about the shaft 69a. At this time, the bent portion 6 of the arm 69
9c contacts the linear portion 67b' of the switch lever 67', rotates the switch lever 67' clockwise, releases the actuator 65a of the switch 65, and turns off the switch 65. Normally, the inertia of the motor 29 and drive system further increases the worm gear 3.
4 and 34' continue to rotate, but if there is excessive inertia, the rotation is stopped by making the pin 34c set on the worm gear 34 come into contact with the cut portion 11c of the guide base, as shown in FIG. I'm trying to regulate it.

As described above, the magnetic recording/reproducing device of the present invention is capable of reducing the number of parts by operating the tape loading and storing of a single reversibly rotating motor using two switches, and also simplifies the mechanism and circuitry to ensure reliability. It has the effect of improving sexual performance.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the magnetic recording/reproducing device of the present invention, and Fig. 2 is a plan view showing the device shown in Fig. 1 with approximately half of the button mounting side removed and a part of the guide base cut away. Figure 3 is a side view of a part of Figure 2,
Figure 4 is a plan view of the tape running system of the apparatus shown in Figure 1 when it is stopped, Figure 5 is a plan view of the tape running system of the apparatus shown in Figure 1 during recording and playback, and Figure 6 is a plan view of the apparatus shown in Figure 1. FIG. 7 is a circuit diagram of the motor of the device shown in FIG.
The figure is a plan view for explaining the motor switch operation, and Figure 8 is an explanatory diagram when the motor switch of the apparatus shown in Figure 1 is closed when a tape is loaded by operating the playback/record button. An explanatory diagram when the switch turned on in Figure 8 is opened after a predetermined time has elapsed from the state shown in the figure, Figure 10 is an explanatory diagram when the switch of the motor in Figure 1 is closed when it is stored by operating the stop button,
FIG. 11 is an explanatory diagram when the switch turned on in FIG. 10 is opened after a predetermined time has elapsed from the state shown in FIG. 10. 3... Stop button, 5... Play button, 7... Record button, 12... Rotating head cylinder, 29... Motor, 34, 34'... Worm gear, 34c,
34c'...pin, 42...magnetic tape, 44...
Loading arm, 54...cassette, 62...
Slider, 64, 65...Switch, 67, 6
7'...Switch lever, 68...Tension spring, 6
9...Arm.

Claims (1)

[Scope of Claims] 1. A magnetic tape stored in a cassette is pulled out from the cassette and attached around the rotating head cylinder to be in a loaded state, and the magnetic tape is pulled out from around the rotating head cylinder into the cassette. A device comprising a magnetic tape loading means for returning the magnetic tape to a stored state, a motor capable of forward and reverse rotation for driving the magnetic tape loading means, and a plurality of switches for opening and closing circuits of the motor. The switch is composed of a forward rotation switch that rotates the motor in the forward direction and a reverse rotation switch that rotates the motor in the reverse direction, and a slider that is driven by the operation of the record, playback and stop buttons, and a slider that is driven by the operation of the record and playback buttons. switch closing means that closes the forward rotation switch when driven by the stop button and closes the reverse rotation switch when driven by the stop button; and a switch closing means that closes the forward rotation switch when driven by the stop button; The magnetic recording and reproducing apparatus is characterized in that a switch opening means is provided for opening the forward rotation switch and the reverse rotation switch after the magnetic tape loading means completes magnetic tape loading and after the magnetic tape storage is completed, respectively. Device. 2 Record the switch lever in which the switch closing means is rotatably mounted to face the forward rotation switch and the reverse rotation switch, respectively, the tension spring installed between the two switch levers, and the switch lever; 2. A magnetic recording and reproducing apparatus according to claim 1, which is formed by a slider attached to be rotated in conjunction with operations during reproduction and stop. 3. The switch opening means is configured to be rotatably driven by a rotating body driven by the motor and having a pin fixed thereto, and the pin which is rotatably mounted and rotated by a predetermined angle to open the forward and reverse rotation switches. A magnetic recording/reproducing device according to claim 1, which is formed by a formed arm and a loading arm.