JPH061570B2 - Magnetic recording / reproducing device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus that uses a cassette half containing a magnetic tape. The “magnetic recording / reproducing apparatus” in the present invention is intended to include not only a recording / reproducing apparatus but also a reproducing only apparatus.

2. Description of the Related Art Conventionally, there has been proposed a magnetic recording / reproducing apparatus that drives a magnetic tape running system by a rotational driving force when a motor rotates in the forward direction, and switches the running direction of a magnetic tape by a rotational driving force when the motor rotates in the reverse direction. (Japanese Patent Application Laid-Open No. 56-134344).

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described conventional example, only one motor is used to drive the magnetic tape running system and to switch the magnetic tape running direction, and the driving force of the motor is not fully utilized. It was a thing.

The present invention uses a single motor to drive a magnetic tape running system,
(EN) A magnetic recording / reproducing apparatus capable of switching a magnetic tape running mode and further transporting a cassette half.

Means for Solving the Problems In order to achieve the above object, the present invention provides a motor capable of forward or reverse rotation, a first rotating body fixed to the rotating shaft of the motor, and a rotating shaft of the motor. A rotatably supported second and third rotating body, and a first one-way clutch mechanism for transmitting the rotational driving force of the first rotating body to the second rotating body only when the motor rotates forward. And a second one-way clutch mechanism that transmits the rotational driving force of the first rotating body to the third rotating body only when the motor rotates in the reverse direction, and transfers the cassette to the reproduction position or discharges it to the cassette insertion portion. A cassette transfer mechanism, a running mode switching mechanism for switching the tape running mode, a gear connecting the first rotating body and the cassette transferring mechanism, and a gear connecting the second rotating body and the running mode switching mechanism. , Either one It is provided with a coupling switching mechanism for bringing a gear into a meshed state and the other gear in a separated state, and a magnetic tape running mechanism which is always coupled with the third rotating body via a power transmission means.

Action The present invention has the above-described configuration, and the cassette half is transferred by the rotational driving force of the first rotating body, the running mode of the magnetic tape is switched by the rotational driving force of the second rotating body, and the third rotating body is also used. The magnetic tape is driven by the rotational driving force of the magnetic tape.

Embodiment 1 In FIGS. 1 to 8, reference numeral 1 is a substrate. First, the mechanism of the surface S1 of the substrate 1 will be described mainly with reference to FIGS. 2 and 4.

The rear edge of the substrate 1 is bent at a right angle to form the rear plate 2. Reference numeral 3 denotes a side plate fixed to the substrate 1. The side plate 3 is formed with guide grooves 4 and 5, and a cutout recess (not shown) is formed at substantially the center of the lower portion of the side plate 3. ing. Reference numeral 7 denotes an auxiliary side surface plate attached to one surface of the side surface plate 3 at a predetermined interval, and a link 8 is rotatably supported by a shaft 9 on the auxiliary side surface plate 7. A pin 10 is planted on one surface of the link 8. This pin 1
0 enters a notch recess (not shown) in the side plate 3. A long pin 11 is planted on the other surface of the link 8. 6
Is a notch recess formed in the lower portion of the auxiliary side plate 7, and the long pin 11 of the link 8 is inserted into this notch recess 6. Reference numeral 12 is an L-shaped side plate fixed to the substrate 1, and a cam groove 13 is formed on the upper surface of the side plate 12. 14
Is a printed circuit board fixed to the upper surface of the side plate 12, and a cassette insertion detection switch 15 and an eject detection switch 16 are attached to the printed circuit board 14. Reference numeral 17 denotes a switch lever rotatably supported on the lower surface of the side plate 12. A cassette detection piece 18 pressed by a cassette half is integrally formed at one end of the switch lever 17, and the other end is provided at the other end. A drive pin 19 for driving the drive piece 15a of the cassette insertion detection switch 15 is integrally formed. Reference numeral 20 denotes a spring that urges the switch lever 17 counterclockwise (counterclockwise in FIG. 4). 21 is the side plate 3, 12
Is a L-shaped carriage which is guided by and slides back and forth (in the directions of the arrows Y and Y '). A rack 22 is formed on the carriage 21, and a cam into which the pin 10 of the link 8 is inserted. The groove 23 is formed. Reference numeral 24 is a pin attached to the carriage 21. Reference numeral 25 denotes a cassette engaging claw rotatably supported at one end of the carriage 21, and the cassette engaging claw 25 has the side plate 12
A pin 26 is inserted into the cam groove 13 of FIG.
Reference numeral 27 denotes a spring for urging the cassette engaging claw 25 in the clockwise direction (clockwise in FIG. 4). The urging force of the spring 27 causes the pin 26 of the cassette engaging claw 25 to move.
The edge of the cam groove 13 on the side surface plate 3 side is contacted. Pins 28 and 29 which are inserted into the guide grooves 4 and 5 of the side plate 3 are planted in the carriage 21.

Reference numerals 30 and 31 are U-shaped lifter plates, 32a and 32b are pins formed at both ends of the lifter plate 31, and 33a and 33b are long holes formed at both ends of the other lifter plate 30. The pins 33a and 32b are inserted into the holes 33a and 33b. Reference numerals 30a and 30b are pins implanted in both end portions of the lifter plate 30, the pins 30a and 30b are inserted into the holes of the substrate 1, and the lifter plate 30 has the pins 30a and 3b.
It is rotatably supported by the substrate 1 with 0b as a fulcrum. Similarly, pins 31a, 31 are planted at both ends of the lifter plate 31.
b is inserted into the hole of the substrate, and the lifter plate 31 is rotatably supported by the substrate 1. 34 is a spring, one end of which is locked to the lifter plate 31 and the other end of which is locked to the rear plate 2 of the substrate 1. The spring 34 causes the lifter plate 31 to move clockwise (clockwise in FIG. 4). Be urged by. Since the lifter plates 30 and 31 are connected by the pins 32a and 32b and the long holes 33a and 33b as described above, when the lifter plate 31 is biased clockwise by the spring 34, the lifter plate 30 is counterclockwise. Is biased in the direction. The long pin 1 of the link 8 rotatably supported by the auxiliary side plate 7
1 contacts the lower surface of the lifter plate 30 and regulates the counterclockwise rotation of the lifter plate 30.

Reference numeral 35 denotes a cassette pressing plate rotatably supported by the rear plate 2 of the substrate 1, and a cam portion 36 is integrally formed at one end of the cassette pressing plate 35. Reference numeral 35a is a pressing piece having a spring property attached to the cassette pressing plate 35.
Reference numeral 37 is a spring that biases the cassette pressing plate 35 in one direction. When the carriage 21 moves rearward (Y 'direction), the pins 24 planted in the carriage 21 engage with the cam portions 36 of the cassette pressing plate 35 and resist the urging force of the spring 37 to press the cassette. The plate 35 is rotationally driven in the arrow R direction. 38 is a switch protection plate for protecting the cassette insertion detection switch 15 and the eject detection switch 16, and 39 is a cassette guide member attached to the side plate 12.

With the above configuration, the cassette transfer mechanism that automatically transfers the inserted cassette half to the reproduction (or recording) position or automatically transfers the cassette half at the reproduction (or recording) position to the cassette unloadable position. Is configured.

Next, a drive mechanism that drives the cassette transfer mechanism will be described. This drive mechanism is mainly configured on the back surface S2 of the substrate 1. In FIG. 5, FIG. 6, FIG. 7, and FIG.
Reference numeral 40 denotes a forward and reverse motor mounted on the front surface S1 of the substrate 1, 41 denotes a rotation shaft of the motor 40, and the rotation shaft 41 penetrates through the hole of the substrate 1 and projects to the back surface S2 side of the substrate 1. There is. Reference numeral 42 denotes a first gear that is press-fitted into the rotary shaft 41, and C-shaped grooves 42a and 42b are formed on both surfaces of the first gear 42 as shown in FIGS. 9A and 9B, respectively. . Reference numeral 43 denotes a second gear that is rotatably supported by the rotating shaft 41, and an upper surface of the second gear 43 has a tenth gear.
As shown in FIG. A, an annular groove 43a having a step portion 43b is formed on the outer peripheral portion. Reference numeral 44 is a semi-cylindrical claw, and the claw 44 is inserted into the groove 42b on the lower surface of the first gear 42 and the annular groove 43a of the second gear 43. The first gear 42, the second gear 43, and the pawl 44 form a one-way clutch mechanism. Therefore, the rotation shaft 41 of the motor 40
Is rotated clockwise (clockwise CW in FIG. 5), the rotational driving force of the motor 40 is transmitted to the rotation shaft 41 → the first gear 42 → the claws 44 → the second gear 43, and the second gear 43 is transmitted. 43 rotates clockwise. However, the motor 4
Even if the rotary shaft 41 of 0 rotates counterclockwise (CCW),
The rotational driving force of the first gear 42 is not transmitted to the second gear 43 via the pawl 44, and the second gear 43 does not rotate. Four
Reference numeral 5 denotes a pulley rotatably supported by the rotary shaft 41,
As shown in FIG. 10B, an annular groove 45a having a step portion 45b on the outer peripheral portion is formed on the lower surface of the pulley 45. 46 is a semi-cylindrical claw, and this claw 46 is inserted into the groove 42a on the upper surface of the first gear 42 and the annular groove 45a of the pulley 45. The first gear 42, the pulley 45, and the pawl 46 constitute a one-way clutch mechanism. For this reason,
When the rotation shaft 41 of the motor 40 rotates counterclockwise (counterclockwise COW in FIG. 5), the rotational driving force of the motor 40 is transmitted to the rotation shaft 41 → the first gear 42 → the claw 46 → the pulley 45. , The pulley 45 rotates counterclockwise (CCW). However, when the motor 40 rotates clockwise (C
Even if the motor 40 rotates to W), the rotational driving force of the motor 40 is
Not transmitted to 5.

11A and 11B show the upper surface C-shaped groove 4 of the first gear 42.
2a, the annular groove 45a on the lower surface of the pulley 45, and the claw 46 are shown, and as shown in FIG.
When 2 rotates counterclockwise (CCW), claw 46
Has one end abutting on the step portion 45b of the annular groove 45a, and the claw 4
The other end of 6 contacts one end of the C-shaped groove 42. Therefore, the counterclockwise rotational driving force of the first gear 42 is the pawl 46.
Is transmitted to the pulley 45 via. On the other hand, FIG. 11B
Shows the case where the first gear 42 rotates in the clockwise direction (CW). One end of the claw 46 abuts on one end of the groove 42, while the other end of the claw 46 is a step portion of the annular groove 45a of the pulley 45. Four
Therefore, the rotational driving force of the first gear 42 is not transmitted to the pulley 45. Reference numeral 47 denotes a fixed shaft fixed to the substrate 1, and a mode clutch lever 48 is rotatably supported on the fixed shaft 47. Reference numeral 49 denotes a third gear rotatably supported by the mode clutch lever 48, and the third gear 49 is integrally formed with a large-diameter gear portion 49L and a small-diameter gear portion 49S. Reference numeral 50 denotes a fourth gear in which a large-diameter gear portion 50L that constantly meshes with a small-diameter gear portion 49S of the third gear 49 and a small-diameter gear portion 50S are integrally formed. It is rotatably supported by the fixed shaft 47. Reference numeral 51 denotes a fifth gear rotatably supported on the substrate 1, and the fifth gear 51 has a large-diameter gear portion 51L and a small-diameter gear portion that constantly mesh with the small-diameter gear portion 50S of the fourth gear 50. The part 51S is integrally formed. In FIG. 5, reference numeral 52 designates a sixth gear rotatably supported on the substrate 1, and the sixth gear 52 has a large diameter gear portion in which the fifth gear 51 has a small diameter which is constantly meshed with the gear portion 51S. 52L and a small-diameter gear portion 52S that constantly meshes with the rack 22 of the carriage 21.

In FIG. 4, reference numeral 53 is a plunger solenoid fixed to the surface S1 of the substrate 1, and a pin 55 is press-fitted at the tip of a movable iron core 54 of the plunger solenoid 53. The pin 55 penetrates the hole of the substrate 1 and projects to the back surface S2. Reference numeral 56 is a spring that biases the movable iron core 54. The pin 55 is the mode clutch lever 4
It is inserted in the long hole 57 of eight. In the state where no current is supplied to the plunger solenoid 53, the movable iron core 5 is
4 is urged by the urging force of the spring 56 in a direction projecting from the plunger solenoid 53. Therefore, the mode clutch lever 48 is biased in the clockwise direction (clockwise in FIGS. 5 and 6) via the pin 55, and the
The large-diameter gear portion 49L of the gear 49 and the first gear 42 are not meshed with each other. On the other hand, when current is supplied to the plunger solenoid 53, the movable iron core 54 of the plunger solenoid 53 is attracted. As a result, the mode clutch lever 48 engaged with the pin 55 of the movable iron core 54 of the plunger solenoid 53 is rotated counterclockwise (counterclockwise in FIGS. 5 and 6), and the third gear 49 is rotated. The large-diameter gear portion 49L meshes with the first gear 42. Therefore, the rotational driving force of the motor 40 is changed from the first gear 42 to the third gear 4
9 → fourth gear 50 → fifth gear 51 → sixth gear 52
→ Transmitted via the rack 22, the carriage 21 moves backward (Y ′ direction) or forward (Y direction). That is, when the motor 40 rotates clockwise, the carriage 2
1 moves backward (Y 'direction), and conversely, when the motor 40 rotates counterclockwise, the carriage 21 moves forward (Y direction).
Move to.

Next, the operation of the cassette transfer mechanism and the cassette transfer drive mechanism will be described.

First, when the cassette half is not inserted from the cassette insertion portion 58, the carriage 21 moves forward (Y direction).
And the lifter plates 30 and 31 are separated from the substrate 1 (the open leg angle of the lifter plates 30 and 31 is small).

Here, when the cassette half is inserted into the cassette insertion portion 58, the cassette detection piece 18 of the switch lever 17 is pushed by the cassette half and the switch lever 17 is rotated. Therefore, the drive pin 19 of the switch lever 17 pushes the drive piece 15a of the cassette insertion detection switch 15, and the cassette insertion detection switch 15 is closed (ON).
Then, electric current is supplied to the plunger solenoid 53, the movable iron core 54 is attracted, the mode clutch lever 48 rotates counterclockwise (counterclockwise in FIGS. 5 and 6), and the third gear 49 Mesh with the first gear 42. When the cassette insertion detection switch 15 is closed (ON) and a predetermined time (for example, 100 mS) has elapsed, current is supplied to the motor 40 by the control of the control circuit, and the motor 40 is rotated clockwise (clockwise in FIGS. 5 and 6). Direction). The rotational driving force of the motor 40 is the first gear 42, the third gear 49, the fourth gear 50, the fifth gear 51, and the sixth gear 5.
The carriage 21 is transmitted to the rack 22 via 2 and the inserted cassette half stops, and the carriage 21 moves rearward (Y 'direction). The cassette engaging claw 25 of the carriage 21 in which the carriage 21 moves further rearward engages with the hole edge of the tape exposed surface of the cassette half, and the cassette half is transported rearward (Y ′ direction). When the carriage 21 is moved further rearward, the pin 26 of the cassette engagement claw 25 supported by the carriage 21 reaches the bent portion 13a of the cam groove 13 of the side surface plate 12, and the cassette engagement claw 25 rotates. Then, disengage the cassette half,
Further, the pin 24 of the carriage 21 comes into contact with the cam portion 36 of the cassette pressing plate 35 to rotate the cassette pressing plate 35,
The cassette half is moved downward (Z direction) by the pressing piece 35a.
Press to. Further, in a direction in which the lifter plates 30 and 31 contact the substrate 1 in synchronization with the rotation of the cassette pressing plate 35 (the lifter plate 3
It rotates in a direction in which the leg opening angle of 0, 31 increases. That is, a bent portion 23 a that bends upward is formed at one end of the cam groove 23 of the carriage 21.
Moves backward (Y 'direction) and the pin 10 of the link 8 reaches the bent portion 23a of the cam groove 23, the link 8 rotates, and the long pin 11 of the link 8 moves in the direction of the board 1.
For this reason, the lifter plates 30 and 31 restricted by the long pin 11 are moved to the substrate 1 by the urging force of the spring 34.
In a direction approaching (the direction in which the leg opening angles of the lifter plates 30 and 31 increase).

Thus, as the carriage 21 moves rearward,
The cassette half is transferred horizontally, and the carriage 2
With the movement of 1, the engagement of the cassette engaging claw 25 with the cassette half is released, the cassette pressing plate 35 is rotated, and the lifter plates 30 and 31 are rotated, so that they are transferred backward. The cassette descends and is set at the reproduction position (or recording position).

On the other hand, when the motor 40 rotates counterclockwise (counterclockwise in FIGS. 5 and 6) in the state where the cassette is set at the reproduction position (or recording position), the above operation is reversed. , The cassette half is moved to the reproducing position (or recording position) in the Z'direction, then to the Y direction, and then to the cassette inserting portion 58, and when the eject detection switch 16 is closed by the carriage 21, The rotation of 40 is stopped.

Next, the magnetic tape running mode switching mechanism will be described.

4 to 8, 60 is a fixed shaft fixed to the back surface S2 of the substrate 1, 61 is a seventh gear in which a large-diameter gear portion 61 and a small-diameter gear portion 61S are integrally formed. The gear 61 shown in FIG. 7 is rotatably supported by the fixed shaft 60. A clutch lever 62 has one end rotatably supported by the fixed shaft 60.
An eighth gear 63 in which a large-diameter gear portion 63L and a small-diameter gear portion 63S are integrally formed is rotatably supported on the shaft provided in the. The small-diameter gear portion 63S of the eighth gear 63 always meshes with the large-diameter gear portion 61L of the seventh gear 61. Reference numeral 64 denotes a long hole formed at the free end of the clutch lever 62, and a pin 65 planted at the free end of the mode clutch lever 48 is inserted into the long hole 64. A coupling switching mechanism is constituted by the mode clutch lever 48, the clutch lever 62, the plunger 53, the pin 55, the third gear 49, the eighth gear 63, etc., shown in FIG. The meshing or disengagement of the third gear 49 and the first gear 42 and the disengagement or meshing of the eighth gear 63 and the second gear 43 are controlled. Reference numeral 66 denotes a ninth gear rotatably supported by a fixed shaft 67 fixed to the back surface S2 of the substrate 1,
The ninth gear 66 is integrally formed with a large-diameter gear portion 66L and a small-diameter gear portion 66S that constantly mesh with the small-diameter gear portion 61S of the seventh gear 61. Reference numeral 68 denotes a tenth gear rotatably supported by the fixed shaft 69 of the substrate 1, and the tenth gear 68 always meshes with the small-diameter gear portion 66S of the ninth gear 66. 5, 7 and 8
In the figure, 70 is a lever whose one end is connected to the eccentric position of the gear 68 of FIG. 10 through a pin 71, and 72 is a sliding lever slidably supported on the back surface S2 of the substrate 1. A bent portion 72a bent into a crank shape is formed at one end of the sliding lever 72, and a pin 73 is planted in the bent portion 72a. This pin 73 is a lever 70
The lever 70 and the sliding lever 72 are connected to each other via a pin 73. When the tenth gear 68 rotates, the sliding lever 72 moves to the lever 70.
Driven through and slides. 74 is a pin implanted in the sliding lever 72, and 75a and 75b are driving pieces integrally formed on one side of the sliding lever 72.
The a and 75b are bent substantially at right angles to the sliding lever 72. Reference numeral 76 is a pin implanted at the other end of the sliding lever 72. Reference numeral 77 denotes a rotating lever rotatably supported by a fixed shaft 78 fixed to the back surface S2 of the substrate 1, and the pin 76 of the sliding lever 72 is inserted into one end of the rotating lever 77. The long hole 79 is formed. The rotation lever 77 is configured such that the sliding lever 72 is in the Y ′ direction or Y direction.
When it slides in the direction, it rotates counterclockwise or clockwise. Reference numeral 80 denotes a black position detecting label attached to the rotating lever 77, and a light reflecting surface 80a is formed at the center of the label 80. Reference numeral 81 denotes a lever whose one end is connected to one end of the rotating lever 77 via a pin 82, and the lever 81 slides in accordance with the rotation of the rotating lever 77. Reference numeral 83 is a pin implanted at the free end of the lever 81.

In FIGS. 5, 7, and 8, 84 and 85 are the substrate 1
Is a link rotatably supported by fixed shafts 86 and 87 fixed to the back surface S2 of the disk. Slots 88 and 89 are formed at one ends of the links 84 and 85, respectively. A drive pin 143 attached to a head chassis 121 described later is inserted into the elongated holes 88 and 89. The link 84 is driven clockwise by the pin 74 of the sliding lever 72 when the sliding lever 72 slides to the left (Y direction in FIGS. 5, 7, and 8), and The link 85 is driven counterclockwise by the pin 73 of the sliding lever 72 when the sliding lever 72 slides to the right (Y 'direction).

4 and 7, reference numerals 90 and 91 denote rotary levers rotatably supported on the surface S1 of the substrate 1 by shafts 92. One end of each of the rotary levers 90 and 91 is described later. Adsorbents 93, 94 attracted by electromagnets are rotatably supported. Reference numeral 95 is a spring supported by a shaft 92. The rotating lever 90 is biased clockwise (clockwise in FIG. 4) by the biasing force of the spring 95, and the rotating lever 91 counterclockwise by the spring 95. Direction (counterclockwise in FIG. 4). Reference numerals 96 and 97 denote inclined surfaces formed on the rotating levers 90 and 91. Reference numeral 98 denotes a slide lever slidably supported on the surface S1 of the substrate 1, and the rotary lever 9 is provided in a recess 99 of the slide lever 98.
The 0 tip is engaged. Therefore, the sliding lever 98
It slides in accordance with the rotation of the rotation lever 90. In FIG. 4, reference numerals 100 and 101 denote pins 102 and 103, respectively.
A rotation arm rotatably supported on the surface S1 of
The rotating arms 100 and 101 are the pins 102 and 10 described above.
It rotates about 3 as a fulcrum. Reference numerals 104 and 105 denote springs for urging the rotating arms 100 and 101 to rotate in one direction, and 106 and 107 denote projections formed on the surface S1 of the substrate 1, respectively.
Rotation in one direction is restricted by the protrusions 106 and 107. Reference numerals 108 and 109 are pins implanted in the rotary arms 100 and 101, and 110 and 111 are rotary arms 1 respectively.
No. 11 and No. 12 gears (see FIGS. 5 and 8) rotatably supported by 00 and 101.
The first and twelfth gears 110 and 111 are located on the back surface S2 side of the substrate 1.

In FIG. 4, when the rotating lever 90 rotates counterclockwise, the sliding lever 98 slides to the left (Y ′ direction), and the rotating arm 100 resists the urging force of the spring 104. Rotate clockwise. On the other hand, in FIG. 4, when the rotation lever 91 rotates clockwise, the spring 10
The rotating arm 101 is rotated counterclockwise against the urging force of 5. 112 is the surface S of the substrate 1 due to the pins 113.
1 is a rotatably supported idler gear plate, and the idler gear plate 112 has a large-diameter thirteenth gear 114,
Fourteenth gear 115 and small diameter fifteenth gear 11
Sixth and sixteenth gears 117 are rotatably supported.
These thirteenth to sixteenth gears 114 to 117 are located on the back surface S2 side of the substrate 1. The thirteenth gear 114 and the fifteenth gear 116, the fifteenth gear 116 and the sixteenth gear 117, and the sixteenth gear 117 and the fourteenth gear 115, respectively, are in constant mesh with each other. Reference numeral 118 is a bent portion formed by bending a part of the idler gap plate 112 at a substantially right angle,
The bent portion 118 is formed on the back surface S through the arcuate hole of the substrate 1.
It projects to the 2 side. A hole 119 is formed in the bent portion 118. Reference numeral 120 is a pin planted in the idler plate 112.

In FIG. 4, FIG. 7, and FIG. 8, 121 is a head chassis to which a magnetic head 122 is attached, and the head chassis 121 has fixed shafts 123a, 123b, 123c fixed to the surface S1 side of the substrate 1. , 123d are inserted to form elongated holes 124a, 124b, 124c, 124d. 121S has head chassis 12 at one end
1 is a spring that is locked to 1 and the other end is locked to the substrate 1.
21 is biased in the X'direction. The head chassis 12
1 is guided by the fixed shafts 123a to 123d and is slidable in the directions of arrows X and X '. Reference numerals 125 and 126 denote cam holes formed in the head chassis 121. The cam holes 125 and 126 have recesses 125a and
126a is formed. These cam holes 126, 125
The pins 10 of the rotating arms 100 and 101, respectively.
8,109 are inserted. 127 is the head chassis 12
1 is a hole formed in the central portion of the substrate 1. The hole 127 is a narrow hole portion 1 into which the pin 128 implanted on the surface S1 of the substrate 1 and the pin 120 of the idler plate 112 are inserted.
27a and a wide rectangular hole 127b into which the pin 120 of the idler plate 112 is inserted, and an inclined part 127c connecting the long hole 127a and the rectangular hole 127b. 1
Reference numeral 29 denotes an arm rotatably supported by the head chassis 121 by a pin 130, and a roller 131 is rotatably supported at the tip of the arm 129. The roller 131 is inserted between the rotating levers 90 and 91, and also has a hole 13 formed in the board 1 in the shape of a key hole.
2 and is projected to the back surface S2 side of the substrate 1. 133
Is a hole for the reel stand into which one of the reel stands described later is inserted,
Numeral 134 is a recess for the reel stand into which the other reel stand is inserted, and 135 and 136 are holes formed in the head chassis 121. These holes 135 and 136 are provided in the capstan shaft and the substrate 1 described later. Tape guide pin 1 fixed to bearings 137, 138 and surface S1 side of substrate 1
39 and 140 are inserted. 141 and 142 are pins 155 and 1 of pinch roller support arms 151 and 152, which will be described later.
56 is a hole to be inserted. Reference numeral 143 is a drive pin fixed to the head chassis 121. The drive pin 143 penetrates the hole of the substrate 1 and projects toward the back surface S2 of the substrate 1, and is inserted into the long holes 88 and 89 of the links 84 and 85. Is inserted.

144 is a sliding plate slidably supported by the head chassis 121. The sliding plate 144 is in the sliding direction of the head chassis 121 with respect to the substrate 1 (arrow X, X'direction).
It slides in a direction (Y-Y 'direction) at right angles to. 14
Reference numeral 5 denotes a square hole formed in the center of the sliding plate 144, and the pin 83 of the lever 81 penetrating the hole of the substrate 1 is inserted into the square hole 145. A support 146 is fixed to the sliding plate 144, and one end of an elastic wire 147 is supported by the support 146. This wire rod 147
Is inserted into the hole 149 of the bent piece 148 on the back surface S2 of the substrate 1, and further inserted into the hole 119 of the bent portion 118 of the idler plate 112. Reference numeral 150 denotes a spring, one end of which is supported by the sliding plate 144 and the other end of which is supported by the substrate 1. The spring 150 stably holds the sliding plate 144 at both ends of the sliding range of the sliding plate 144. It

7 and 8, when the lever 81 slides in the direction of the arrow Y ', the sliding plate 144 slidably supported by the head chassis 121 by the pin 83 of the lever 81.
Slides in the direction of arrow Y '. Therefore, the wire 147 rotates clockwise (clockwise in FIG. 7) with the hole 149 of the bent piece 148 of the substrate 1 as a fulcrum. Therefore, the idler gear plate 112 rotatably supported by the substrate 1 rotates counterclockwise (counterclockwise in FIG. 7) about the pin 113 as a fulcrum. Conversely, when the lever 81 slides in the direction of the arrow Y, the idler plate 112 rotates clockwise.

4 and 7, reference numerals 151 and 152 denote pinch roller support arms rotatably supported by fixed shafts 123a and 123b on the surface S1 of the substrate 1. The pinch roller support arms 151 and 152 have pinch roller support arms 151 and 152, respectively. 153,15
4 is rotatably supported. Reference numerals 155 and 156 are pins implanted in the pinch roller support arms 151 and 152. The pins 155 and 156 are inserted into the holes 142 and 141 formed in the head chassis 121, respectively.
Further, it is inserted into the holes 157 and 158 of the substrate 1. When the head chassis 121 moves forward in the direction of the arrow X, the pin 15 inserted into the holes 142, 141 of the head chassis 121.
5, 156 are driven, and the pinch roller support arm 15
1, 152 rotate around the fixed shafts 123a, 123b.

In FIG. 5, reference numerals 159 and 160 denote capstan shafts rotatably supported by bearings 137 and 138 attached to the substrate 1, and flywheels 161 and 162 are fixed to one ends of the capstan shafts 159 and 160. Has been done. 161L and 162L are large-diameter gear parts 161S and 162S integrally formed with the flywheels 161 and 162 as shown in FIG.
2 is a small-diameter gear portion integrally formed with the second gear.

Large diameter gear part 16 of the flywheels 161 and 162
1L and 162L are the rotating arms 101 and 1 respectively.
12th gear 111, which is rotatably supported by
The first gear 110 is meshable with the first gear 110, and the small diameter gear portions 161S and 162S of the flywheels 161 and 162 mesh with the fourteenth gear 115 and the thirteenth gear 114, which are rotatably supported by the idler gear plate 112, respectively. It is possible. Reference numerals 163 and 164 denote U-shaped electromagnets having coils 165 and 166, respectively.
4 is fixed to the back surface S2 of the substrate 1 by screws 188a and 188b. The adsorbents 93 and 94 supported by the rotating levers 90 and 91 respectively include the electromagnets 164 and 1.
It is arranged so as to correspond to the end face of 63.

In FIG. 5, reference numeral 167 designates a pillar 16 on the back surface S2 of the substrate 1.
8a, 168b, 168c are fixed reel receiving plates, and fixed shafts 169 fixed to the reel receiving plates 167,
The reel stands 171 and 172 are rotatably supported on the 170. 173 and 174 are gear parts of the reel stands 171 and 172, and the gear part 173 of the reel stand 171 has a twelfth gear 111 supported by the rotating arm 101.
Alternatively, the fourteenth gear 1 supported by the idler gear plate 112
Fifteen meshes with each other, and the eleventh gear 110 supported by the rotating arm 100 or the thirteenth gear 11 supported by the idler gear plate 112 is attached to the gear portion 174 of the other reel base 172.
4 mesh. A printed circuit board 175 is attached to the reel receiving plate 167, and a cassette detection switch 176 that is closed when the cassette half is set at the reproducing position (or recording position) is fixed to the printed circuit board 175. The movable piece 17 of this cassette detection switch 176
7 protrudes toward the front surface S1 side of the substrate 1 through the hole of the substrate 1. Reference numeral 178 denotes a movable plate whose one end is fixed to the surface S1 of the substrate 1. When the cassette half is set at the reproducing position (or recording position), the movable plate 178 is pushed by the cassette half, and this corner is moved by the plate 178. The movable piece 177 of the cassette detection switch 176 is pushed, and the cassette detection switch 176 is closed (ON). 179 is a changeover switch fixed to the printed circuit board 175, and the movable piece 180 of this changeover switch 179 is the sliding lever 72.
With the sliding of the driving lever 75a of the sliding lever 72,
It is switched by being driven by 75b. Reference numeral 181 denotes a reproduction state detection switch fixed to the printed circuit board 175. The reproduction state detection switch 181 is the head chassis 1
It is driven by the drive pin 143 planted in 21 and is closed. Reference numerals 182 and 183 denote a light emitting element and a light receiving element fixed to the printed circuit board 175, respectively.
The emitted light is reflected by the label 80 for position detection and is received by the light receiving element 183. The position of the rotating lever 77 can be detected by the amount of light received by the light receiving element 183. Reference numeral 184 denotes a pulley rotatably supported at a corner on the rear surface S2 side of the substrate 1, and 185 denotes a belt. The belt 185 is a pulley 45 rotatably supported on a rotation shaft 41 of a motor 40, the pulley 184, Flywheel 1
61, 162.

In FIG. 5, 186 and 187 are reel stands 171 and 1
A circular label attached to the back surface of 72. The labels 186 and 187 are composed of a black portion and a reflective portion. Labels 18 on the reel stands 171 and 172, respectively
Light emitting elements 190, 191 and light receiving elements 192, 193 are arranged on a printed circuit board 175 facing 6,187. Labels 186 and 186 from the respective light emitting elements 190 and 191
Light is emitted toward 187. This light is label 18
The light receiving element 19 is reflected by the reflective portions 6 and 187.
The light is received by Nos. 2 and 193, but is hardly reflected by the black portions of the labels 186 and 187. Therefore, when the reel stands 171 and 172 are rotating, the light receiving element 19
A rectangular signal is output from 2,193. On the other hand, when the reel stands 171 and 172 are stopped, the light receiving element 19
Signals of a constant level are output from 2,193. 18
Reference numeral 9 denotes a cover plate screwed to the columns 168a and 168c of the substrate 1.

FIG. 15 shows a control system for controlling the motor 40, the plunger solenoid 53, and the electromagnets 163 and 164 based on the state of the mechanism section and various operation switches.

In FIG. 15, 200 is a central control unit (CPU),
A control circuit including a read-only memory (ROM) and a writable / readable memory (RAM).
Numeral 00 indicates a detection means for detecting the state of the mechanical section, that is, a cassette insertion detection switch 15, a cassette detection switch 176, a reproduction state detection switch 181, a light receiving element 183, 192, 193, a changeover switch 179, an eject detection switch 16 And the output of the unvoiced detection circuit 201 is input. Reference numeral 202 denotes a first operation switch, 20 used when the cassette half is ejected from the apparatus by stopping the operation in an operating state such as a reproducing state and a recording state.
Reference numeral 3 is a second operation switch used when fast-forwarding (FF) the magnetic tape, and 204 is fast-rewinding (RE) the magnetic tape.
The third operation switch 205 used when performing W) is the fourth operation switch 205 used when switching from the reproduction state of one channel (for example, side A) of the magnetic tape to the reproduction of the other channel (for example side B). The operation switch 206 is used to suspend the temporary reproduction during the reproduction operation of the magnetic tape. The fifth operation switch 207 is used to select a predetermined music from a plurality of music recorded on the magnetic tape. Is a sixth operation switch used for the above, and by using the sixth operation switch 207 and the second (or third) operation switch 203, 204 in combination, a plurality of songs ahead or before the currently reproduced song. It is possible to select songs automatically. For example, when the seventh operation switch 207 is operated and the second switch 203 is pressed three times, fast forward (FF) is performed up to the beginning of the music three songs ahead. The control circuit 20 outputs the outputs of the various detection means and the various operation switches.
0 is input to the input port 208. Reference numeral 209 is a mechanism state detecting means for detecting the output states of the various detecting means, 2
Reference numeral 10 is a mechanism state determination means for determining the current state of the mechanism portion based on the detection result of the mechanism state detection means 209,
The determination result of the mechanism state determination means 210 is the control means 21.
It is output to 1. Reference numeral 212 is a monitoring means for monitoring the detection state of the mechanism state detection means 209. For example, in this monitoring means 212, after a predetermined time has elapsed after a cassette half has been inserted,
It is monitored whether or not the reproduction state has been entered. Reference numeral 213 is an abnormality judging means for judging whether the operation is normal or abnormal based on the monitoring result of the monitoring means 212.
The determination result of 13 is input to the control unit 211. 214
Is a voiced / unvoiced determination means for determining whether or not the reproduction output from the magnetic head continues for a predetermined time.
The judgment result of the unvoiced judgment means 214 is input to the control means 211. Reference numeral 215 is a key input detecting means for detecting whether or not the various operation switches 202 to 207 are operated, and 216 is a key input judging means for judging the next operation mode based on the detection result of the key input detecting means 215. The determination result of the input determination unit 216 is input to the control unit 211. The control means 211 controls the means 213, 210,
Based on the signs of 214 and 216, various control signals are output. This control signal is applied to the motor drive circuit 218, the plunger drive circuit 219, and the electromagnet drive circuits 220 and 221 via the output port 217, and the motor 40, the plunger solenoid 53, and the electromagnets 163 and 164 are controlled.

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

(A) An operation of transferring the cassette half from the cassette insertion portion 58 to the reproduction position (see the timing chart of FIG. 16).

When the cassette half is inserted into the cassette insertion portion 58, the cassette detection piece 18 is rotated clockwise by the inserted cassette half, and the cassette insertion detection switch 15 is closed (ON) (at time T _{1 in} FIG. 16). ), Current is supplied to the plunger solenoid 53, and the movable iron core 54 of the plunger solenoid 53 is attracted against the urging force of the spring 56. With the suction of the movable iron core 54, the mode clutch lever 48 is driven by the pin 55 of the movable iron core 54, the mode clutch lever 48 rotates, and the third clutch rotatably supported by the mode clutch lever 48. Gear 49
The large-diameter gear portion 49L meshes with the first gear 42 that is press-fitted into the rotating shaft 41 of the motor 40. Further, after the cassette insertion detection switch 15 is closed (ON), when a predetermined time (for example, 100 mS) elapses, current is supplied to the motor 40 (time T _{2 in} FIG. 16), and the rotation shaft 41 of the motor 40 is rotated. Rotate clockwise (CW). This motor 40
The rotational driving force of the first gear 42 → the third gear 49 → the fourth gear
Gear 50 → fifth gear 51 → sixth gear 52 → the rack 22 of the carriage 21 and the carriage 21 is transported rearward (Y ′ direction) while the cassette half is stopped. When the carriage 21 is transferred to a predetermined position, the carriage 21 is attached to the hole edge of the tape exposed surface of the cassette half.
The cassette engaging claws 25 are engaged, and the cassette half is also moved backward (Y 'direction) together with the carriage 21.

When the carriage 21 is moved further rearward, the pin 24 of the carriage 21 contacts the cam portion 36 of the cassette pressing plate 35 to rotate the cassette pressing plate 35 (direction of arrow R in FIG. 4), and at the same time, to move the carriage 21. Since the pin 10 inserted in the cam groove 23 moves to the bent portion 23a of the cam groove 23, the link 8 rotates, and the long pin 11 fixed to the link 8 moves toward the substrate 1. For this reason, the lifter plates 30 and 31 whose rotation in the substrate 1 direction is restricted by the long pin 11 rotate in the substrate 1 direction. By the rotation of the cassette pressing plate 35 and the rotation of the lifter plates 30 and 31, the cassette half transferred to the rear is moved in the substrate 1 direction (Z direction). With the rotation of the cassette pressing plate 35 and the rotation of the lifter plates 30 and 31, the cassette half descends toward the substrate 1 and down to a predetermined position.
The cassette half pushes the flexible plate 178, and the flexible plate 178 further pushes the cassette detection switch 17
The movable piece 177 of No. 6 is driven, and the cassette detection switch 1
76 closed (T ₄ time of FIG. 16), a cassette half is detected to have been set to the playback position.

By the above operation, the inserted cassette half is set at the reproduction position.

(B) Operation of running the magnetic tape in the cassette half set at the reproduction position (see the timing chart in FIG. 16).

When the cassette half is set to the reproduction position and the cassette detection switch 176 is closed, the current supply to the motor 40 is cut off, the rotation of the motor 40 is stopped, and the current supply to the plunger solenoid 53 is cut off. Therefore, the movable iron core 54 of the plunger solenoid 53 is pulled outward by the urging force of the spring 56, the mode clutch lever 48 is rotated clockwise, and the third gear 4 is rotated.
9 and the first gear 42 are disengaged from each other, resulting in a non-meshing relationship.

With the clockwise rotation of the mode clutch lever 48,
The clutch lever 62 connected to the mode clutch lever 48 rotates clockwise, and the clutch lever 62
The large-diameter gear portion 63L of the eighth gear 63 rotatably supported by the second gear 63 meshes with the second gear 43.

After the cassette detection switch 176 is closed, a predetermined time (for example, 100 mS) elapses (time T _{5 in} FIG. 16), current is supplied to the motor 40, and the motor 40 rotates clockwise (CW).

When the motor 40 rotates in the clockwise direction, the rotational driving force of the motor 40 changes the rotation shaft 41 of the motor 40 to the first gear 42.
→ The pawl 44 → the second gear 43 → the eighth gear 63 → the seventh gear 61 → the ninth gear 66 → the tenth gear 68 is transmitted, and the tenth gear 68 is shown in FIG. 13 (A). Rotate clockwise from the state shown. With the clockwise rotation of the tenth gear 68, the lever 70 moves and the sliding lever 72 slidably supported by the substrate 1 slides in the Y direction.

As the sliding lever 72 slides in the Y direction, the pin 74 planted in the sliding lever 72 contacts the link 84, and the link 84 is rotated clockwise (see FIG. 7). .
Since the drive pin 143 fixed to the head chassis 121 is inserted into the elongated hole 88 of the link 84, the drive pin 143 is driven according to the clockwise rotation of the link 84, and the head chassis 121 moves the spring 121S. It moves in the direction of arrow X against the urging force of. When the sliding lever 72 is gradually further slid in the Y direction, reduced (T ₆ point of FIG. 16) is the output of the light receiving element 183, the movable piece 180 of the change-over switch 179 of the sliding lever 72 driving piece 75b By Y
Are driven in the direction, change-over switch 179 is switched (T ₇ point of FIG. 16). The gear 68 of FIG. 10 is shown in FIG.
When rotated 90 degrees clockwise from the state shown in (A), the drive pin 14 driven in the arrow X direction by the link 84.
3 contacts the reproduction state detection switch 181, and the reproduction state detection switch 181 is closed (at time T _{8 in} FIG. 16). Further, when the gear 68 in FIG. 10 rotates clockwise, the sliding lever 72, which has slid in the Y direction, starts sliding in the Y ′ direction, and the link 84 rotates counterclockwise. At the beginning, the reproduction state detection switch 181 is opened, and the light receiving element 1
The output of 83 increases (time T _{9 in} FIG. 16). When the sliding lever 72 further slides in the Y ′ direction, the output of the light receiving element 183 decreases (time T _{10 in} FIG. 16). When the sliding lever 72 further rotates in the clockwise direction after passing through the state shown in FIG. 13 (B), the pin 73 of the sliding lever 72 abuts the link 85, and the link 85 is rotated counterclockwise, The drive pin 143 of the head chassis 121 is driven again in the arrow X direction.

Gear 68 of the first 10 Figure 13 further rotates clockwise from the state (B), the changeover switch 179 is switched by the driving piece 75a of the sliding lever 72 (T ₁₁ time of FIG. 16). The tenth gear 68 rotates further,
When rotated from the state shown in FIG. 3 (B) by about 90 ° clockwise, the reproduction state detection switch 18
1 is closed, and current is supplied to the electromagnets 163 and 164 (time T _{12 in} FIG. 16). When electric current is supplied to the electromagnets 163 and 164, the attracting members 93 of the rotating levers 90 and 91,
94 is attracted by the electromagnets 164 and 163, and the rotating levers 90 and 91 are held in the closed state as shown in FIG. 14 (A). In this state, the tenth gear 68 further rotates in the clockwise direction, the sliding lever 72 starts sliding again in the left direction, and the link 85 becomes rotatable in the clockwise direction. Since the position of the head chassis 121 is regulated by the rotating levers 90 and 91 held in the closed state, the head chassis 121 does not return to the arrow X'by the urging force of the spring 121S. When the tenth gear 68 makes one revolution from the state shown in FIG. 13 (A) and returns to the original position, the output of the light receiving element 183 increases again (time T _{13 in} FIG. 16). The second rise of the output of the light receiving element 183 cuts off the supply of current to the motor 40 and stops the rotation of the motor 40. When a predetermined time (for example, 100 mS) elapses from the second rise (T ₁₃ ) of the output of the light receiving element 183, the motor 40 rotates counterclockwise (time T _{14 in} FIG. 16).

Since the pins 155 and 156 inserted into the holes 141 and 142 of the head chassis 121 are driven as the head chassis 121 moves in the direction of arrow X, the pinch roller support arms 151 and 152 rotate. , The pinch rollers 153 and 154 move toward the capstan shafts 159 and 160. In addition, the head chassis 121
The magnetic head 122 attached to the magnetic tape also approaches the magnetic tape in the cassette.

Further, while the tenth gear 68 makes one full clockwise rotation from the state shown in the thirteenth (A) state, the lever 81 connected to the sliding lever 72 via the rotary lever 71 slides left and right one reciprocally. Move. Therefore, the sliding plate 144 is first moved leftward (Y direction) and then rightward (Y ′) by the pin 83 of the lever 81.
Direction) is further driven to the left, and the tenth gear 68 is set to 1
When it rotates and returns to the original state, the sliding plate 144 moves to the left (Y
Direction). Sliding plate 14
4, one end of a wire 147 is supported by the column 146, the wire 147 is inserted into the hole 149 of the bent piece 148 of the substrate 1, and the other end is inserted into the hole 119 of the bent piece 118 of the idler plate 112. Therefore, when the sliding plate 144 is driven to the left (Y direction), the wire 147 is
Counterclockwise (FIGS. 7 and 8) with the bent piece 148 of FIG.
(See the figure), the idler gear plate 112 is rotated clockwise, and the fourteenth gear 115 rotatably supported by the idler gear plate 112 is a flywheel 161.
13th gear 11 that meshes with the small-diameter gear portion 161S and is rotatably supported by the idler gear plate 112.
Reference numeral 4 meshes with a gear portion 174 of the reel stand 172.

The tenth gear 68 moves from the position shown in FIG.
When rotated by 0 °, the springs 104, 10
The rotation of the rotation arm 100 and the rotation of the rotation arm 101 by the urging force of 5 causes the pins 108 and 109 of the rotation arms 104 and 105 and the cam hole 12 of the head chassis 121.
Since it is regulated by locking with 5,126, FIG.
In the state shown in (A), the eleventh and twelfth gears 110 and 111 rotatably supported by the rotation arms 100 and 101 are large-diameter gear portions 161 of the flywheels 161 and 162.
L, 162L and the gear unit 1 of the reel stands 171 and 172
It does not mesh with 73 and 174.

As described above, when the tenth gear 68 rotates 360 ° from the state shown in FIG. 13 (A) and returns to the original state (at time T _{13 in} FIG. 16), (a) the head chassis 121, The magnetic tape in the cassette half is held by the pinch roller and the capstan shaft, the magnetic head contacts the magnetic tape, and (c) the flywheel 161 has a small diameter. Gear portion 161S of fourteenth gear 115 and thirteenth gear 114 and thirteenth gear 114 mesh with gear portion 174 of reel stand 172, respectively. (D) Eleventh gear 110 and twelfth gear 111 are flywheel 162, respectively. 161 large diameter gear 162
L, 161L and the gear unit 1 of the reel stand 172, 171
74, 173 does not mesh with each other, and (e) the motor 40 stops rotating clockwise.

In this state, a predetermined time (e.g., 100 mS) elapses, current is supplied to the motor 40, the motor 40 is rotated in the counterclockwise direction (T ₁₄ time of FIG. 16).

When the motor 40 rotates counterclockwise, the rotational driving force of the motor 40 passes through the first gear 42 → pawl 46 → pulley 45 → belt 185 → pulley 184 to the flywheel 16.
1 and 162, the flywheel 161 rotates counterclockwise, and the flywheel 162 rotates clockwise.

The rotational driving force of the flywheel 161 is such that the fourteenth gear 115 → the sixteenth gear 117 → the fifteenth gear 116 meshes with the small-diameter gear portion 161S of the flywheel 161.
→ Transmitted via the thirteenth gear 114 to the gear portion 174 of the reel base 172 with which the thirteenth gear 114 meshes, and the reel base 172 rotates clockwise. As a result, the reel with built-in cassette half that engages with the reel stand 172 rotates clockwise, and the magnetic tape in the cassette runs.
The face is regenerated.

(C) An operation of shifting from the A-side reproduction state to the fast-forward (FF) state (see the timing chart in FIG. 17).

When the operation switch 203 for fast forward (FF) is operated (time T _{1 in} FIG. 17) in the reproduction state of the side A, the counterclockwise rotation of the motor 40 is stopped and the electromagnets 163, 164 are moved. The current supply is cut off (time T _{2 in} FIG. 16). Therefore, the adsorption of the adsorbents 94, 93 by the electromagnets 163, 164 is released, and the turning lever 90,
91 becomes rotatable. Therefore, the rotating levers 90, 9
The roller 1 whose movement in the direction of the arrow X'is restricted by 1
31 is moved in the direction of the arrow X'by the urging force of the spring 121S. As a result, the reproduction state detection switch 181
Is opened (OFF) (at time T _{2 in} FIG. 17). When a predetermined time (for example, 100 mS) has elapsed from the time point T ₂ , the motor 40 starts rotating clockwise (time point T _{3 in} FIG. 17). Therefore, the tenth gear 68 makes one rotation clockwise. At time T ₁₀ during one rotation of the tenth gear 68, that is, at the time when the head chassis 121 is driven in the arrow X direction and the reproduction state detection switch 181 is closed, current is supplied only to the electromagnet 164. . After that
The rotation of the motor 40 stops at _11th time, that is, when the output of the light receiving element 183 rises. Here, the movement of the roller 131 between T _{10 and} T ₁₁ will be described. At time T ₁₃ , the roller 131 is in the most moved state in the arrow X direction as shown in FIG. 14 (A), and in this state, the electromagnet 164 is moved.
Is supplied with electric current, the attracting body 93 is attracted by the electromagnet 164, and the turning of the turning lever 90 is restricted. However, since no electric current is supplied to the other electromagnets 163,
The rotating lever 91 is rotatable. After that, the link 85 rotates clockwise in accordance with the rotation of the tenth gear 68,
The head chassis 121 moves in the arrow X'direction. Although the roller 131 also moves according to the movement of the head chassis 121, only the turning lever 91 can turn, so the roller 131 moves along the inclined surface 96 of the turning lever 90, and the turning lever 91 moves. The roller 131 is rotated and the substrate 131 is rotated.
The movement in the arrow X'direction is restricted by the hole edge of the key hole-shaped hole 132 and the inclined surface 96 of the rotating lever 90 (Fig. 14 (B)). The rotation lever 91 is rotated by the roller 131.
When the rotating arm 101 is rotated, the rotating arm 101 is rotated clockwise, and the twelfth gear 111 supported by the rotating arm 101 is rotated.
Is in a state where it does not mesh with the gear portion 173 of the reel stand 171 and the large diameter gear portion 161L of the flywheel 161. On the other hand, since the pin 108 of the rotating arm 100 enters the recess 126a of the cam hole 126 of the head chassis 121, the eleventh gear 110 supported by the rotating arm 100 is the gear portion 174 of the reel stand 172 and the flywheel 16.
It meshes with the large-diameter gear portion 162L. In this state, the pin 120 of the idler plate 112 is in the long hole 127a of the head chassis 121.
The 13th and 14th gears 114 of the idler gear plate 112,
115 is a gear portion 174, 17 of the reel stand 172, 171.
3 and the flywheels 162, 161 are in a state of not meshing with the small-diameter gear portions 162S, 161S. afterwards,
The rotation of the motor 40 stops at time T ₁₁ . When the motor 40 stops rotating and a predetermined time (for example, 100 mS) elapses, the motor 40 rotates counterclockwise (T _{12 in} FIG. 17).
At this time), this rotational driving force is transmitted to the flywheels 161 and 162 via the belt 185, and the rotational driving force of the flywheel 162 is further applied to the large diameter gear portion 162L of the flywheel 162 → the eleventh gear 110 → the reel stand. 17
It is transmitted to the second gear portion 174 and fast-forwards the magnetic tape.

(D) Operation of shifting from the A-side reproduction state to the fast reverse (REW) state (see the timing chart in FIG. 17).

The operation switch 204 for rewind (REW) is operated,
The operation of shifting from the A-side playback state to the fast-reverse (REW) state is similar to the operation of shifting from the A-side playback state to the fast-forward (FF) state, but the operation shown in FIG.
The difference is that at the time of the drawing, current is supplied only to the electromagnet 163. When current is supplied only to the electromagnet 163 at time T _{10 in} FIG. 17, the attracting body 94 is attracted by the electromagnet 163, and as a result, the rotation of the rotating lever 91 is restricted. On the other hand, since the rotating lever 90 is in a rotatable state, when the roller 131 moves in the direction of the arrow X ′, the rotating lever 90 is rotated clockwise (FIG. 7) by the roller 131. As a result, the rotating arm 100
Is rotated via a sliding lever 98, and this rotating arm 1
The eleventh gear 110 supported by 00 is the reel stand 17
The second gear portion 174 and the large diameter gear portion 162L of the flywheel 162 do not mesh with each other. On the other hand, in this state, the pin 109 of the rotating arm 101 enters the recess 125a of the cam hole 125 of the head chassis 121,
The twelfth gear 111 supported by the rotating arm 101 is
Gear part 173 of reel stand 171 and flywheel 1
It meshes with the large diameter gear part 161L of 61. As a result, when the motor 40 starts to rotate in the counterclockwise direction at time T _{12 in} FIG. 17, this rotational driving force is transmitted to the belt 185 → the flywheel 161 → the twelfth gear 111 → the reel stand 171 for quick return. (REW) operation is performed.

(E) Operation of shifting from the fast forward (FF) state of the A side to the A side reproducing state (see the timing chart of FIG. 18).

In the fast-forward (FF) state of the surface A, when the operation switch 202 for stop (STOP) is operated (time T _{1 in} FIG. 18) to end the fast-forward state, the motor 40 is rotated after a predetermined time. Stop and electromagnet 16
Current supply is interrupted to 4 (T ₂ the time of FIG. 18).
When thereafter a predetermined time (e.g., 100 mS) elapses, current is supplied to the motor 40, the motor 40 is rotated in the clockwise direction _{(T 3} time points Figure 18). Therefore, the gear 68 in FIG. 10 makes one rotation and stops at time T ₁₀ . At time T ₉ during this period, the reproduction state detection switch 181 is closed, and current is supplied to the electromagnets 163 and 164. Therefore, the roller 131 is moved by the rotating levers 90 and 91 so that the arrow X '
The movement of the head chassis 121 is restricted and the head chassis 121 is held at the reproducing position. Therefore, when the motor 40 starts to rotate in the counterclockwise direction at time T _{11 in} FIG. 18, the reproduction of the surface A is performed.

(F) Operation of shifting from the A-side reproduction state to the B-side reproduction state (see the timing chart in FIG. 19).

As shown in FIG. 19, when the operation switch 205 for program switching is operated in the A-side reproduction state (time T _{1 in} FIG. 19), the rotation of the motor 40 is stopped at time T ₂ after a predetermined time. And the electromagnets 163 and 164
The current supply to is cut off. After that, a predetermined time (for example, 1
(00 mS), electric current is supplied to the motor 40,
Motor 40 is rotated in the clockwise direction _{(T 3} time points Fig. 19). As a result, the tenth gear 68 is rotated clockwise by approximately 1
Rotate 80 ° and stop at T ₇ . During this time, the changeover switch 179 is changed over at time T ₅ , and the reproduction state detection switch 181 is closed at time T _{6 so} that the electromagnets 163, 16 are closed.
4 is supplied with current. T ₃ gear 6 of the first 10 between through T ₇
8 rotates approximately 180 ° from the state shown in FIG. 13 (A) to the state shown in FIG. 13 (B), during which the sliding plate 144 slidably supported by the head chassis 121 is It is driven to the right (Y 'direction) by the pin 83 of 81. Therefore, the idler plate 112 is driven in the counterclockwise direction, the 13th gear 114 of the idler plate 112 meshes with the small diameter gear part 162S of the flywheel 162, and the 14th gear 115 is the gear part of the reel stand 171. 173 meshes. Therefore, when the motor 40 rotates counterclockwise at time T _{8 in} FIG. 19, the rotational driving force of the motor 40 increases from the belt 185 to the flywheel 162 to the thirteenth gear 1.
14 → 15th gear 116 → 16th gear 117 → first
The gear 115 of No. 4 is transmitted to the reel stand 171, the magnetic tape is run, and the B side is reproduced.

(G) Operation of transitioning to the reproduction state of the B side at the end of the A side (second
(See the timing chart of Figure 0).

As shown in FIG. 20, in the reproduction state of the surface A, the reel bases 171 and 172 are rotating, so that the light receiving element 1
A rectangular signal is output from 92. Here, when the end of the surface A is reached (at the time point T _{1 in} FIG. 20), the reel stand 171,
The rotation of 172 is stopped and the rectangular signal is no longer output from the light receiving element 192. In the A-side reproduction state, the timer of the control circuit is reset at the time of falling of the output of the light receiving element 192, and when the rotation of the reel base 171 is stopped and the timer cannot be reset, the timer is counted up. When the timer counts to a predetermined value, the current supply to the motor 40 is cut off, the rotation of the motor 40 is stopped, and the current supply to the electromagnets 163 and 164 is cut off (time T _{2 in} FIG. 20). . Therefore, the roller 131 whose movement in the arrow X ′ direction is restricted by the rotating levers 90 and 91 moves in the arrow X ′ direction together with the head chassis 121 due to the biasing force of the spring 121S. Therefore, the reproduction state detection switch 181 is opened. After a lapse of a predetermined time, electric current is supplied to the motor 40, and the motor 40 rotates clockwise (20th time).
_{T 3} time in the figure). Therefore, the tenth gear 68 rotates clockwise by 180 ° and stops at time T ₇ . During this time, T ₅
At the time point, the changeover switch 179 is changed over, and the reproduction state detection switch 181 at the time point T ₆ is closed.
Current is supplied to 164. Also, while the tenth gear 68 rotates 180 ° clockwise, the head chassis 12
The sliding plate 144 slidably supported by the
Since it is driven in the right direction (Y ′ direction) by the pin 83 of the idler plate 112, the idler plate 112 is driven in the counterclockwise direction by the wire 147, and the thirteenth gear 114 meshes with the small-diameter gear portion 162S of the flywheel 162. Further, the fourteenth gear 115 meshes with the gear portion 173 of the reel stand 171. When the result T ₈ motor 40 at the time is rotated in the counterclockwise direction, the rotational driving force, the belt 185 → flywheel 162 → thirteenth gear 114 → 15 gear 116
-> 16th gear 117-> 14th gear 115-> It is transmitted to the reel stand 171 and it becomes a reproduction state of B side.

(H) An operation of stopping the reproduction state of the A side or B side and ejecting the cassette half (see the 21st timing chart).

When the A side (or B side) is being reproduced, the eject (EJ)
When the operation switch 202 for ECT) is operated (time T _{1 in} FIG. 21), the rotation of the motor 40 is stopped after a predetermined time and the current supply to the electromagnets 163 and 164 is cut off (T in FIG. 21). ₂ ). Therefore, the head chassis 1
21 moves in the direction of the arrow X ', and the reproduction state detection switch 1
81 opens. Further, since current is supplied to the plunger solenoid 53 at time T ₂ , the mode clutch lever 48 is rotated counterclockwise and the clutch lever 62 is rotated counterclockwise by the mode clutch lever 48. Therefore, the third gear 49 supported by the mode clutch lever 48 meshes with the first gear 42 fixed to the rotation shaft 41 of the motor 40, and the eighth gear 63 supported by the clutch lever 62. Large diameter gear 63L
Meshing with the second gear 43 is released. When a predetermined time (for example, 100 mS) elapses from the time point T ₂ , the motor 40
Begins to rotate in the counterclockwise direction (T ₃ time points Figure 21).
Therefore, the rotational driving force of the motor 40 is equal to that of the third gear 49.
→ fourth gear 50 → fifth gear 51 → sixth gear 52 →
The carriage 21 is transmitted to the rack 22 and moves in the arrow Y direction. With the movement of the carriage 21 in the arrow Y direction,
Since the cassette pressing plate 35 rotates and the link 8 rotates clockwise, the lifter plates 30 and 31 rotate in a direction away from the substrate 1 (a direction in which the leg opening angles of the lifter plates 30 and 31 become smaller). . Therefore, the cassette half is moved away from the substrate 1. Therefore, T _{4 in} FIG.
At this time, the cassette detection switch 176 is opened (O
FF) After that, the cassette half is moved by the carriage 21 in the direction of the arrow Y, the cassette insertion detection switch 15 is opened (OFF) at time T ₅ , and the eject detection switch 16 is opened (OFF) at time T ₆ .
The current supply to the motor 40 is cut off, the current supply to the plunger solenoid 53 is cut off, and the eject operation is completed.

It should be noted that the other operations are operations obtained by changing a part of the above operations, and since the details can be understood from the above operations, the details are omitted.

EFFECTS OF THE INVENTION As apparent from the above embodiment, the present invention provides a first rotating body fixed to a rotating shaft of a motor and second and third rotating bodies rotatably instructed to the rotating shaft of the motor. Is provided, the motor is rotated in the forward direction and the reverse direction, and the coupling switching mechanism is switched to transfer the cassette half by the rotation driving force of the first rotating body and drive the second rotating body by using one motor as a drive source. Switching the running mode of the magnetic tape by force,
There is an effect that the magnetic tape can be run by the driving force of the third rotating body.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of a magnetic recording / reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view of a front side of the apparatus, FIG. 3 is a perspective view of a back side of the apparatus, and FIG. FIG. 5 is an exploded perspective view of the front side of the device, FIG. 5 is an exploded perspective view of the back side of the device, FIG. 6 is an exploded perspective view of the vicinity of the motor of the device, and FIG. 7 is a magnetic tape running mode switching of the device. FIG. 8 is an exploded perspective view of the main part of the mechanism, FIG. 8 is an exploded perspective view of a part of the device, and FIG. 9 (A) (B)
Is a top view and a bottom view of the first gear 42 used in the device, FIG. 10 (A) is a top view of the second gear 43 used in the device, and FIG. 10 (B) is a pulley 45 used in the device. FIG. 11 is a bottom view of FIG. 11, FIGS. 11 (A) and (B) are views showing the relationship between the first gear, pulley and claw of the device, FIG. 12 is a perspective view of a flywheel used in the device, and FIG. FIGS. 14A and 14B are explanatory views of the operation of a part of the magnetic tape running mode switching mechanism of the same device.
(B) and (C) are views for explaining the operation of the turning lever of the device, the first
FIG. 5 is a block diagram of a control system of the device, and FIGS.
The figure is a timing chart of the device. 1 ... Board, 15 ... Cassette insertion detection switch, 16 ... Eject detection switch, 21 ... Carriage, 22 ... Rack, 30, 31 ... Lifter plate, 35 ... Cassette holding plate, 4
0 ... Motor, 41 ... Rotating shaft, 42 ... First gear, 43 ...
Second gear, 44 ... Claw, 45 ... Pulley, 46 ... Claw, 48
... Mode clutch lever, 49 ... Third gear, 50 ... Fourth gear, 51 ... Fifth gear, 52 ... Sixth gear, 53
... Plunger solenoid, 61 ... Seventh gear, 62 ... Clutch lever, 63 ... Eighth gear, 66 ... Ninth gear,
68 ... Tenth gear, 70 ... Lever, 72 ... Sliding lever, 73, 74 ... Pin, 77 ... Rotating lever, 84, 85
... Link, 90, 91 ... Rotating lever, 93, 94 ... Adsorbent, 98 ... Sliding lever, 100, 101 ... Rotating arm,
110 ... Eleventh gear, 111 ... Twelve gear, 112
... Idler GA plate, 114 ... 13th gear, 115 ... 14th gear, 116 ... 15th gear, 117 ... 16th gear, 121 ... Head chassis, 122 ... Magnetic head,
129 ... Arm, 131 ... Roller, 137, 138 ... Bearing, 143 ... Drive pin, 144 ... Sliding plate, 147 ... Wire rod, 153, 154 ... Pinch roller, 159, 160 ...
Capstan shaft, 161, 162 ... Flywheel, 1
63, 164 ... Electromagnet, 171, 172 ... Reel stand, 1
76 ... Cassette detection switch, 179 ... Changeover switch,
181 ... Playback state detection switch, 184 ... Pulley, 18
5 ... Belt, 200 ... Control circuit, 202-207 ... Operation switch.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuji Nakame 4-3 Tsunashima-higashi, Kohoku-ku, Yokohama-shi, Kanagawa Matsushita Communication Industry Co., Ltd. (72) Inventor Shogo Nakayama Tsunashima-higashi, Kohoku-ku, Yokohama-shi, Kanagawa 4th, 3rd, 1st, Matsushita Communication Industrial Co., Ltd. (56) Bibliography Sho 56-119155 (JP, U)

Claims (1)

[Claims] 1. A motor capable of forward or reverse rotation, a first rotating body fixed to a rotating shaft of the motor, and second and third rotating bodies rotatably supported by the rotating shaft of the motor. When,
A first one-way clutch mechanism that transmits the rotational driving force of the first rotating body to the second rotating body only when the motor rotates in the normal direction, and the rotation of the first rotating body only when the motor rotates in the reverse direction. A second one-way clutch mechanism that transmits the driving force to the third rotating body, a cassette transfer mechanism that transfers the cassette to the reproduction position or discharges it to the cassette insertion portion, and a running mode switching mechanism that switches the tape running mode. , Above first
Of the gears that connect the rotating body and the cassette transfer mechanism and the gear that connects the second rotating body and the traveling mode switching mechanism to each other so that one of the gears is in the engaged state and the other gear is in the separated state. A magnetic recording / reproducing apparatus comprising a mechanism and a magnetic tape running mechanism which is constantly coupled to the third rotating body via a power transmission means.