JPS61144749A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve the positioning precision of a head chassis by providing an attracted body to a couple of rotary levers supported on a substrate in a leg openable state and attracting attracted bodies by electromagnets, and holding the rotary lever in the leg opening state and locking the head chassis. CONSTITUTION:When a gear 68 is rotated clockwise through a motor 40, a sliding lever 72 moves in an Y direction, a pin 74 rotates a link 84 clockwise, and a driving pin 143 engaging the long-sized hole 88 of the link 84 moves the head chassis 21 in an X direction against a spring. A changeover switch is operated by the driving piece 75b of the lever 72. When the gear 68 rotates by 90 deg., a pin 143 abuts on a playback state detection switch 181 to close the switch 181, which is closed to supply a current to the electromagnets 163 and 164 provided to the substrate to attract the attracted bodies 93 and 94 of the rotary levers 90 and 91 to hold the levers 90 and 91 in the leg opening state, thereby positioning the head chassis 121.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording and reproducing apparatus using a cassette tonneau containing a magnetic tape. Note that the term "magnetic recording and reproducing device" in the present invention refers not only to devices capable of recording and reproducing, but also to devices capable of only reproducing.

2. Description of the Related Art A conventional general magnetic recording/reproducing device slidably supports a bed chassis to which a magnetic head is attached, and during recording or reproduction, the head chassis is advanced in a direction approaching a cassette half to generate a magnetic head. The head is brought into contact with the magnetic tape in the cassette half, and when the magnetic tape is fast forwarded or reversed, the magnetic head is moved back to a position where it slightly touches the magnetic tape, making it possible to locate the beginning of a song when selecting a song. There is. In such a magnetic recording/reproducing apparatus, it is necessary to improve the positional accuracy of the magnetic head during recording or reproduction, or during fast forwarding or fast reversing.

In the conventional magnetic recording/reproducing apparatus of this type, movement by an electromagnet or the like is transmitted to a plurality of arms, levers, etc., and the head chassis is positioned by these arms, levers, etc.

Problems to be Solved by the Invention However, in the conventional example described above, the positioning accuracy of the head chassis is poor because the movement of an electromagnet or the like is transmitted to an arm, a lever, etc. to position the head chassis.

The present invention aims to solve the above-mentioned conventional problems and improve the positioning accuracy of the head chassis.

Means for Solving the Problems In order to achieve the above object, the present invention has a pair of rotary levers supported on a base plate so that the legs can be opened and closed, an adsorbent provided on each rotary lever, and an adsorbent for each adsorbent. It is equipped with a pair of electromagnets that attract each rotating lever and hold each rotating lever in a closed state.

Operation The present invention has the above structure, and the engaging member provided on the head chassis is moved against the biasing force of the elastic body by a pair of rotating levers held in the closed leg state, or by one of the rotating levers held in the closed leg state. The rotating lever and the edge of the hole formed in the base plate are used for locking.

Embodiments In FIGS. 1 to 8, reference numeral 1 denotes a substrate, and FIG. 2 first shows the mechanism of the surface S1 of this substrate 1.

The explanation will be centered on FIG. 4.

The rear edge of the substrate 1 is bent at a right angle to form a rear plate 2. Reference numeral 3 denotes a side plate fixed to the base plate 1. Guide grooves 4 and 6 are formed in this side plate 3, and a notch recess (not shown) is formed approximately in the center of the lower part of the side plate 3. ing. Reference numeral 7 denotes an auxiliary side plate attached to one side of the side plate 3 at a predetermined interval, and a link 8 is rotatably supported on the auxiliary side plate 7 by a shaft 9. A bottle 1o is planted on one side of the link 8. This bottle 1
o enters a notch recess (not shown) in the side plate 3. A long bottle 11 is planted on the other side of the link 8. 6
is a notched recess formed in the lower part of the auxiliary side plate 7, and a long bottle 11 of the link 8 is inserted into this notched recess 6. Reference numeral 12 denotes an L-shaped side plate fixed to the substrate 1, and a cam groove 13 is formed in 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 16 and an ejection detection switch 16 are attached to this printed circuit board 14. A switch lever 17 is rotatably supported on the lower surface of the side plate 12. A cassette detection piece 18 that is pressed by the cassette half is integrally formed at one end of the switch lever 17. A drive pin 19 for driving the drive piece 15a of the cassette insertion detection switch 16 is integrally formed at the end. 2o is a spring that biases the switch lever 17 in a counterclockwise direction (counterclockwise in FIG. 4). 21 is the side plate 3, 12
This carriage 21 is guided by an L-shaped carriage that slides back and forth (arrow Y, Y' force direction).
A rack 22 is formed therein, and a cam groove 23 into which the bin 1o of the link 8 is inserted is formed. 2
4 is a pin attached to the carriage 21. A cassette engaging claw 26 is rotatably supported at one end of the carriage 21, and a pin 6 inserted into the cam groove 13 of the side plate 12 is implanted in the cassette engaging claw 25. 27 is a spring that urges the cassette engaging pawl 25 clockwise (clockwise in FIG. 4);
7, the pin 26 of the cassette engaging claw 26
is brought into contact with the hole edge of the cam 11$13 on the side plate 3 side.

Pins 28 and 29 are implanted in the carriage 21 to be inserted into the guide grooves 4 and 5 of the side plate 3.

30.31 is a U-shaped lifter plate, 32a and 32b are pins formed at both ends of the lifter plate 31, and 33a.

33b is a long hole formed at both ends of the other lid plate 30, and the pins 33a, 3 are inserted into the long holes saa, a3b.
2b has been inserted. 30a and 30b are lifter plates 3
0, and this pin 30a,
30b is inserted into a hole in the substrate 1, and the lifter plate 3o is rotatably supported by the substrate 1 using the bins 30a and 3ob as fulcrums. Similarly, pins 31a and 31b implanted at both ends of the lifter plate 31 are inserted into holes in the substrate 1, and the lifter plate 31 is rotatably supported by the substrate 1. Reference numeral 34 denotes a spring whose one end is locked to the lifter plate 31 and the other end is locked to the rear plate 2 of the base plate 1. This spring 34 causes the lifter plate 31 to move clockwise (clockwise in FIG. 4). is energized by As described above, the lifter plates 3o and 31 have the bins 32a, 32b and the long hole 33a.

33b, so when the lifter plate 31 is biased clockwise by the spring 34, the lifter plate 3o is biased counterclockwise. The long pin 11 of the link 8 rotatably supported by the auxiliary side plate 7 contacts the lower surface of the lifter plate 30 and restricts the counterclockwise rotation of the lifter plate 3o.

Reference numeral 35 denotes a case 7 rotatably supported on the rear plate 2 of the substrate 1.
) A cassette holding plate 35 has a cam portion 36 integrally formed at one end thereof.

Reference numeral 35a denotes a holding piece having spring properties attached to the cassette holding plate 35. A spring 37 biases the cassette holding plate 36 in one direction. The carriage 21 is rearward (Y
/ When the carriage 21 is moved in the force direction, the bottle 24 installed in the carriage 21 engages with the cam portion 36 of the cassette holding plate 35, and moves the cassette holding plate 36 in the direction of arrow R against the biasing force of the spring 37. Drive rotationally. 38 is a cassette insertion detection switch 15. A switch protection plate 39 for protecting the eject detection switch 16 is a suction guide member attached to the side plate 12.

With the above configuration, the inserted cassette No.-7 can be automatically transported to the playback (or recording) position, or the cassette half at the playback (or recording) position can be automatically transported to the cassette ejection position. A cassette transport mechanism is configured.

Next, a drive mechanism for driving the cassette transfer mechanism will be explained. This drive mechanism is mainly constructed on the back surface S2 of the substrate 1. In Figures 6, 6, 7, and 8,
4o is a forward and reversible motor attached to the front surface S1 of the substrate 1, and 41 is a rotating shaft of the motor 40, which passes through a hole in the substrate 1 and protrudes toward the back surface S2 of the substrate 1. There is. 42 is a first gear press-fitted into the rotating shaft 41, and both sides of the first gear 42 are marked with the marks shown in FIG. 9A.
, B, C-shaped grooves 42a and 42b are formed. 43 is a second rotatably supported by the rotating shaft 41;
As shown in FIG. 10A, the upper surface of the second gear 43 is provided with an annular groove 4 having a stepped portion 43b on the outer periphery.
3a is formed. 44 is a semi-cylindrical pawl, and this pawl 44 is inserted into the groove 42b on the lower surface of the first gear 42 and the annular groove 43aK of the second gear 43. The first gear 42, the second gear 43, and the pawl 44 constitute a one-way clutch mechanism. However, when the rotating shaft 41 of the motor 4o rotates clockwise (clockwise CW in FIG. 6), the rotational driving force of the motor 40 is transmitted between the rotating shaft 41 - the first gear 42 - the pawl 44 - the second gear. 43, and the second gear 43 rotates clockwise. However, motor 4o
Even if the rotating shaft 41 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. .

Reference numeral 46 denotes a pulley rotatably supported by the rotating shaft 41, and the lower surface of the pulley 46 has a
An annular groove 45a having a stepped portion 46b is formed on the outer periphery. 46 is a semi-cylindrical pawl, and this pawl 46 is connected to the groove 42a on the upper surface of the first gear 42 and the annular groove 45a of the pulley 46.
is inserted into.

The first gear 42, pulley 46, and one pawl 4e constitute a one-way clutch mechanism. Therefore, the rotating shaft 41 of the motor 40 is rotated counterclockwise (counterclockwise direction CC in FIG. 6).
W), the rotational driving force of the motor 40 is transmitted to the rotating shaft 41 - the first gear 42 - the pawl 46 - the pulley 46, and the goo 946 rotates counterclockwise (CCW). However, even if the motor 40 rotates clockwise (CW), the rotational driving force of the motor 4o is not transmitted to the pulley 46.

FIGS. 11A and 11B show the C-shaped groove 4 on the upper surface of the first gear 42.
2a, the annular groove 45a on the lower surface of the pulley 46, and the pawl 46, and as shown in FIG.
2 rotates counterclockwise (CCW), the pawl 46
One end of the claw 46 abuts against the stepped portion atsb of the annular groove 46a, and the other end of the claw 46 abuts one end of the C-shaped groove 42. Therefore, the counterclockwise rotational driving force of the first gear 42 is applied to the pawl 46.
is transmitted to the pulley 46 via. On the other hand, Figure 11B
shows the case where the first gear 42 rotates clockwise (CW), one end of the pawl 46 comes into contact with one end of the groove 42, and the other end of the pawl 46 contacts the step of the annular groove 45a of the pulley 46. 4r
sb, and therefore, the rotational driving force of the first gear 420 is not transmitted to the pulley 45. 47 is a fixed shaft fixed to the base plate 1, and a mode clutch lever 48 is rotatably supported on this fixed shaft 47. A third gear 49 is rotatably supported by the mode clutch lever 48, and this gear 49 has a large diameter gear portion 49L and a small diameter gear portion 4sS integrally formed. 50 is a fourth gear in which a large-diameter gear part soL and a small-diameter gear part soS, which are always in mesh with the small-diameter gear part 49S of the third gear 49, are integrally formed, and this fourth gear 6o is It is rotatably supported by the fixed shaft 47. 51 is a fifth gear rotatably supported by the base plate 1, and this fifth gear 51 has a large diameter gear portion s1L that is always meshed with the small diameter gear portion 50S of the fourth gear 50 and a small diameter gear. The portion 51S is integrally formed. In FIG. 5, 52 is a sixth gear rotatably supported by the base plate 1, and this sixth gear 62 is a large-diameter gear that is always meshed with the small-diameter gear portion 51S of the fifth gear 51. Part 52 L Carriage 210 mentioned above
It consists of a small-diameter gear portion 528 that constantly meshes with the rack 22.

In FIG. 4, reference numeral 53 denotes a plunger solenoid fixed to the surface S1 of the substrate 1, and a pin 65 is press-fitted into the tip of the movable iron core 54 of the plunger solenoid 63. This pin 65 passes through a hole in the substrate 1 and projects to the back surface S2. 66 is a spring that biases the movable iron core 54. The upper B pivin 65 is the mode clutch lever mentioned above.
48 is inserted into the elongated hole 57. When no current is supplied to the plunger solenoid 63, the movable iron core 54 is urged in a direction to protrude from the plunger solenoid 63 by the urging force of the spring 56. For this reason,
The mode clutch lever 48 is biased clockwise (clockwise in FIGS. 5 and 6) via the pin 56, and the third
The large-diameter gear portion 49L of the gear 490 and the first gear 42 are in a non-meshing state. On the other hand, when electric current is supplied to the Blanjan renoid 53, the movable iron core 64 of the Gra/Jean renoid 53 is attracted. As a result, the mode clutch lever 48 that engages with the pin 65 of the movable iron core 54 of the Branjan Lenoid 53 is rotated counterclockwise (counterclockwise in FIGS. 5 and 6), and the third gear 49 large-diameter gear portions 49L mesh with the first gear 42. Therefore, the rotational driving force of the motor 40 is transmitted between the first gear 42 and the third gear 4.
9-Fourth gear 50-Fifth gear 51-Sixth gear 62
- The carriage 21 moves backward (in the Y' force direction) or forward (in the Y direction).

That is, when the motor 40 rotates clockwise, the carriage 21 moves backward (in the Y' force direction, and conversely, the motor 40
When the carriage 21 rotates counterclockwise, the carriage 21 moves forward (Y
direction).

Next, the operations of the cassette transfer mechanism and the cassette transfer drive mechanism will be explained.

First, when the cassette half is not inserted from the cassette insertion part 58, the carriage 21 is moved forward (in the Y direction).
The lifter plates 30, 31 are located at a distance from the substrate 1 (the opening angle of the lifter plates 30, 31 is small).

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 tip-7, and the switch lever 17 is rotated. For this reason, the drive pin 19 of the switch lever 17
As a result, the drive piece 15a of the cassette insertion detection switch 16
is pressed, and the cassette insertion detection switch 15 is closed (ON).
) L, current is supplied to the plunger solenoid 63, the movable iron core 54 is attracted, the mode clutch lever 48 is rotated counterclockwise (counterclockwise in FIGS. 5 and 6), and the third Gear 49 meshes with first gear 42 . When the cassette insertion detection 2-inch 16 is closed (ON) and a predetermined time (for example, 100 m5) has elapsed, current is supplied to the motor 4o under the control of the control circuit, and the motor 40 is rotated clockwise (see Figs. 5 and 6). (clockwise).

The rotational driving force of this motor 4° is applied to the first gear 42. Third gear 49 degrees Fourth gear 50. Fifth gear 51. It is transmitted to the rack 22 via the sixth gear 62, and the inserted cassette...-7 remains stopped while the carriage 21 moves backward (Y
/Move in the Z direction. When the carriage 21 moves further backward, the cassette engaging claw 25 of the carriage 21 engages with the hole edge of the tape exposed surface of the cassette half, and the cassette half is transported backward (in the Y/Z direction) by the carriage 21. When the carriage 21 is further moved rearward, the pin 2 of the cassette engaging claw 26 supported by the carriage 21
6 reaches the bent portion 13a of the cam groove 13 of the side plate 12,
The cassette engaging claw 26 rotates to release the cassette half, and the pin 24 of the carriage 21 abuts the cam portion 36 of the cassette holding plate 35 to rotate the cassette holding plate 36 and release the holding piece 35a. to move the cassette half downwards (
Z direction). Furthermore, in synchronization with the rotation of the cassette holding plate 35, the lifter plates 30.degree. That is, a bent portion 23a that bends upward is formed at one end of the cam groove 23 of the carriage 21, and the carriage 21 moves backward (in the Y/Z direction) and presses the pin 1 of the link 8.
0 reaches the bent portion 23a of the cam groove 23, the replacement link 8 rotates, and the long pin 11 of the link 8 moves toward the board 1. Therefore, the lid plates 30 and 31, which are regulated by the long pins 11, are rotated in a direction toward the substrate 1 (in a direction in which the opening angle of the lifter plates 30 and 31 is increased) by the biasing force of the spring 34.

In this way, as the carriage 21 moves backward,
As the cassette No.-7 is transported horizontally, and as the carriage 21 moves, the engagement of the cassette engaging claw 26 with the cassette No.-7 is released, and the cassette holding plate 36 rotates. As the lifter plates 30 and 31 rotate, the cassette that has been transported backward is lowered and set at the playback position (or recording position).

On the other hand, when the motor 4o rotates counterclockwise (counterclockwise in Figures 5 and 6) while the cassette is set at the playback position (or recording position), the operation is opposite to the above operation. , the cassette half is transported in the 2' direction from the playback position (or recording position), then in the Y direction, transported to the cassette insertion section 68, and then transferred to the carriage 2.
When the eject detection switch 16 is closed by 1,
Rotation of motor 40 stops.

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

In FIGS. 4 to 8, 60 is a fixed shaft fixed to the back surface S2 of the substrate 1, and 61 is a seventh gear in which a large-diameter gear portion 61L and a small-diameter gear portion 61S are integrally formed. , this seventh gear 61 is rotatably supported by a fixed shaft 6o. Reference numeral 62 denotes a clutch lever whose one end is rotatably supported by the fixed shaft 60, and a large diameter gear portion 63L and a small diameter gear portion 638 are integrally mounted on the shaft provided on the clutch lever 62. The formed eighth gear 63 is rotatably supported. The small diameter gear portion 638 of the eighth gear 63 is always meshed 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 66 implanted at the free end of the mode clutch lever 48 is inserted into this long hole 64.

Mode clutch lever 48, clutch lever 62, granger 53 shown in FIG. Pin 65. Third gear 49.
The eighth gear 63 and the like constitute a coupling switching mechanism, and the third gear 49
meshing with the first gear 42 or releasing the meshing and the eighth gear 42
The disengagement or engagement between the second gear 63 and the second gear 43 is controlled.

66 is a ninth gear rotatably supported by a fixed shaft 67 fixed to the back surface S2 of the substrate 1;
6 is integrally formed with a large-diameter gear portion eeL that constantly meshes with the small-diameter gear portion 61S of the seventh gear 61 and a small-diameter gear portion aSS.

68 is a first rotatably supported by a fixed shaft 69 of the substrate 1.
This tenth gear 68 always meshes with the small diameter gear portion 6SS of the ninth gear 66. Figure 5,
In FIGS. 7 and 8, 70 is a lever whose one end is connected to the eccentric position of the tenth gear 68 via a pin 71, and 72 is a sliding lever that is slidably supported on the back surface S2 of the substrate 1. This sliding lever 72 has a bent portion 72a bent into a crank shape at one end thereof, and a pin 73 is implanted in this bent portion 72a. This pin 73 is inserted into a hole formed at the other end of the lever 70, and
o and the sliding lever 72 are connected via a pin 73. When the first gear 68 of the sliding lever 72 rotates, it is driven via the lever 70 and slides. 74 is a pin implanted in the sliding lever 72, 76a, 7tsb
is a driving piece integrally formed on one side of the sliding lever 72, and these driving pieces 7sa and 7tsb are the driving pieces 7sa and 7tsb of the sliding lever 72.
It is bent almost at right angles to 2. 76 is a pin implanted at the other end of the sliding lever 72. 77 is board 1
It is a rotating lever rotatably supported by a fixed shaft 78 fixed to the back surface S2 of the , and one end of the rotating lever 77 has a long hole 79 into which the pin 76 of the sliding lever 72 is inserted.
is formed. The rotating lever 77 rotates counterclockwise or clockwise when the sliding lever 72 slides in the Y' direction or in the Y direction. Reference numeral 80 denotes a black position detection label attached to the rotating lever 77, and a light reflecting surface 80a is formed in the center of the label 80. A lever 81 has one end connected to one end of the rotary lever 7γ via a pin 82, and this lever 81 slides in accordance with the rotation of the rotary lever 77. 83 is lever 81
It is a pin planted at the free end of the

5, 7, and 8, 84 and 85 are links rotatably supported by a fixed shaft 86.87 fixed to the back surface S2 of the substrate 1, and one end of this link 84.85 Long holes 88 and 89 are formed in each of the holes 88 and 89, respectively. A drive pin 143 attached to the head chassis 121, which will be described later, is inserted into the long holes 88 and 89. Above link 8
4, when the sliding lever 72 slides in the left direction (Y direction in FIGS. 5, 7, and 8), the sliding lever 72
is driven clockwise by the pin 74 of the link 85.
is driven counterclockwise by the pin 73 of the slide lever 72 when the slide lever 72 slides in the right direction (Y' direction).

4 and 7, reference numeral 90.91 is a rotary lever rotatably supported on the surface S1 of the substrate 1 by a shaft 92, and one end of this rotary lever 90.91 is provided with a Adsorbing bodies 93 and 94 that are attracted by electromagnets are rotatably supported.

Reference numeral 95 denotes a spring supported by the shaft 92, and the biasing force of the spring 96 biases the rotating lever 9o clockwise (clockwise in FIG. 4), and the spring 95 biases the rotating lever 91 counterclockwise. direction (counterclockwise in FIG. 4). 96°97 is an inclined surface formed on the rotating lever 90.91. A sliding lever 98 is slidably supported on the surface S1 of the substrate 1.
The tip of the rotary lever 90 is engaged with the recess 99 of the rotary lever 90 . Therefore, the sliding lever 98 slides in accordance with the rotation of the rotating lever 90. In FIG. 4, reference numerals 100 and 101 indicate a rotating arm rotatably supported on the surface S1 of the substrate 1 by pins 102 and 103;
0.1-01 rotates around the pins 102 and 103 as fulcrums. 104° and 105 are the rotating arms 1, respectively.
00, 101 to rotate in one direction; 106 and 107 are protrusions formed on the surface of the substrate 10, and the rotating arms 100, 101 are attached to these protrusions 1
06.107 restricts rotation in one direction.

108 and 109 are pins implanted in the rotating arms 100 and 101, and 110 and 111 are the rotating arms 100, respectively.
, 101 rotatably supported by the eleventh gear and the twelfth gear.
gear (see Figures 5 and 8), and this 11th gear. The twelfth gears 110 and 111 are located on the back surface S2 side of the substrate 1.

In FIG. 4, when the rotating lever 9o rotates counterclockwise, the sliding lever 98 slides to the left (Y' direction), causing the rotating arm 100 to move against the biasing force of the spring 104. Rotate clockwise.

On the other hand, in FIG. 4, when the rotating lever 91 rotates clockwise, the rotating arm 101 rotates counterclockwise against the biasing force of the spring 105.

Reference numeral 112 denotes an idler gear plate rotatably supported on the surface S1 of the substrate 1 by a pin 113, and the idler gear plate 112 has a large-diameter thirteenth gear 114, a fourteenth gear 115 . and a small diameter sixteenth gear 116. A sixteenth gear 117 is rotatably supported. These 13th
~Sixteenth gears 114 to 117 are located on the back surface S2 side of the substrate 1. The thirteenth gear 114 and the sixteenth gear 116, the sixteenth gear 116 and the sixteenth gear 117, and the sixteenth gear 117 and the fourteenth gear 115 are always in mesh with each other. 118 is a bent portion formed by bending a part of the idler gear plate 112 at an approximately right angle;
18 protrudes through an arc-shaped hole in the substrate 1 toward the back surface S2. A hole 119 is formed in the bent portion 118 .

120 is a bottle embedded in the idler gear plate 112.

4, FIG. 7, and FIG. 8, 121 is a head chassis to which a magnetic head 122 is attached, and this head chassis 121 has fixed shafts 123a and 123b fixed to the surface S1 side of the substrate 1.

Long holes 124a and 12 into which 123G and 123d are inserted
4b.

124c and 124d are formed. 121S has one end locked to the hend jar, ;/121, and the other end to the board 1.
This spring 121 is
The head chassis 121 is urged in the X' direction by S. The head chassis 121 has the fixed shafts 123a to 1
23d, and is slidable in the force directions of arrows x and x'. Reference numerals 125 and 126 are cam holes formed in the head chassis 121, and recesses 125a and 126a are formed on one side of the cam holes 125 and 126, respectively. The bins 108 and 109 of the rotating arm 100° 101 are inserted into the cam holes 126 and 125, respectively. Reference numeral 127 is a hole formed in the center of the head chassis 121, and this hole 127 is connected to the bottle 128 planted on the surface S1 of the substrate 1 and the bottle 12 of the idler gear plate 112.
0 is inserted into the narrow elongated hole 127a, and the idler gear plate 112 has a wide square hole 12 into which the bin 120 is inserted.
7b, and an inclined portion 127C connecting the long hole portion 127a and the square hole portion 127b.

Reference numeral 129 denotes an arm that is rotatably supported by a bottle 130 on the heel 7 palm 121, and a roller 131 is rotatably supported at the tip of this arm 129. The roller 131 is inserted between the rotary levers 90 and 91, and a keyhole-shaped hole 1 formed in the substrate 1.
32 and protrudes toward the back surface S2 of the board 1. 13
3 is a reel stand hole into which one of the reel stands to be described later is inserted.

134 is a reel stand recess into which the other reel stand is inserted, 136 and 136 are holes formed in the head/child 7121, and holes 135 and 136 are provided with capstan shafts and substrates 1 to be described later. bearing 137, 1
38 and tape guide bins 139 and 140 fixed to the surface 81 side of the substrate 1 are inserted. 141 and 142 are bins 1 of pinch roller support arms 151 and 152, which will be described later.
55 and 156 are holes to be inserted. Furthermore, 143 is a drive bin fixed to the head chassis 121, and this drive bin 143 passes through a hole in the board 1 and protrudes to the back surface S2 side of the board 1, and the long hole 8B of the link 84, 85,
89 is inserted.

Reference numeral 144 denotes a sliding plate that is slidably supported by the head chassis 121, and this sliding plate 144 is arranged in a direction perpendicular to the sliding direction (arrow x, 145 is a square hole formed in the center of the sliding plate 144, and the square hole 146 has the pin 83 of the lever 81 passing through the hole in the substrate 1. 146 is the sliding plate 14
4, and one end of an elastic wire 147 is supported by this support 146. This wire 1
47 is inserted into the hole 149 of the bent piece 148 on the back surface S2 of the board 1, and further inserted into the bent part 118 of the idler gear plate 112.
is inserted into the hole 119 of. 160 has a sliding plate 144 at one end.
The sliding plate 144 is stably held at both ends of the slidable range of the sliding plate 144 by this spring 150.

7 and 8, when the lever 81 slides in the direction of arrow Y', the sliding plate 144, which is slidably supported on the head chassis 121 by the pin 83 of the lever 81,
slides in the direction of arrow Y'. Therefore, the wire 147 is moved clockwise (
(clockwise in Fig. 7). Therefore, the idler gear plate 112 rotatably supported by the base plate 1 rotates counterclockwise (counterclockwise in FIG. 7) about the pin 113 as a fulcrum. Conversely, when the lever 81 slides in the direction of arrow Y, the idler gear plate 112 rotates clockwise.

In FIGS. 4 and 7, reference numerals 151 and 152 indicate pinch roller support arms rotatably supported by fixed shafts 123a and 123b on the surface S1 of the substrate 1. 153, 1
64 is rotatably supported. Pins 155 and 15t6 are implanted in the pinch roller support arms 151 and 152, and these pins 155 and 156 are inserted into holes 142 and 141 formed in the head chassis 121, respectively, and are further inserted into holes 157 and 157 in the substrate 1, respectively. 158.

When the head chassis 121 moves forward in the direction of arrow X, the pins 155 and 156 inserted into the holes 142 and 141 of the head chassis 121 are driven, and the pinch roller support arms 151 and 152 are moved toward the fixed shaft 123a.

It rotates around 123b.

In FIG. 5, reference numerals 159 and 160 indicate capstan shafts rotatably supported by bearings 137 and 138 attached to the substrate 1, and these capstan shafts 159 and 160
Flywheels 161 and 162 are fixed to one end of the . 161L and 162L are large diameter gear parts integrally formed with the flywheels 161 and 162 as shown in FIG. 12, and 1s1s and 1623 are small diameter gear parts integrally formed with the flywheels 161 and 162. .

Large diameter gear portion 1e of the flywheels 161, 162
1L and 162L are the rotating arms 101.1, respectively.
The twelfth gear 111.00 is rotatably supported by the twelfth gear 111. 1st
The small diameter gear portions 1s1s and 1628 of the flywheels 161 and 162 are able to mesh with the 14th gear 116 and the 13th gear 114, respectively, which are rotatably supported by the idler gear plate 112. Can be interlocked.

163 and 164 are U-shaped electromagnets having coils 165 and 166, respectively.
4 is the screw 188a, 1 ssb on the back side S2 of the board 1
Fixed by The adsorbents 93 and 94 supported by the rotating levers 90 and 91, respectively, are connected to the electromagnet 1.
64 and 163 so as to face each other.

In FIG. 5, 167 is the column 16 on the back side S2 of the board 1.
8a, 168b, and 168c, and a fixed shaft 169 fixed to this reel receiving plate 167.
, 170, reel stands 171, 172 are rotatably supported. 173 and 174 are reel stands 171 and 172
The gear part 173 of one reel stand 171
, a twelfth gear 11 supported by a rotating arm 101 is shown.
1 or the 14th gear 116 supported by the idler gear plate 112 meshes with the gear portion 174 of the other reel stand 172.
The eleventh gear 110 supported by the rotating arm 100
Alternatively, the thirteenth gear 114 supported by the idler gear plate 112 meshes. 176 is a printed circuit board attached to the reel receiving plate 167, and a cassette detection switch 176 is fixed to this printed circuit board 176, which closes when the cassette notebook is set at the playback position (or recording position). There is.

The movable piece 177 of the cassette detection switch 176 projects toward the surface S1 of the substrate 1 through a hole in the substrate 1. Reference numeral 178 is a flexible plate whose one end is fixed to the surface S1 of the substrate 1, and the case notebook is located at the playback position (or recording position).
When set in the cassette half, the flexible plate 17
8 is pressed, the flexible plate 178 pushes the movable piece 177 of the cassette detection switch 176, 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 moves the drive pieces 75a, y of the slide lever 72 as the slide lever 72 slides.
It is driven and switched by sb. 181 is a playback state detection switch fixed to the printed circuit board 175, and this playback state detection switch 181 is connected to the head chassis 1.
It is driven and closed by a drive bottle 143 installed in 21.

Reference numerals 182 and 183 are a light emitting element and a light receiving element respectively fixed to the printed circuit board 176. Light emitted from the light emitting element 182 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 based on the amount of light received by the light receiving element 183. 184 is a pulley rotatably supported at the corner of the back surface S2 of the substrate 1; 185 is a belt;
Reference numeral 85 denotes a pulley 45.85 rotatably supported by the rotating shaft 41 of the motor 4o. The above pulley 184. flywheel 161
．． It is multiplied by 162.

In FIG. 6, 186 and 187 are reel stands 171.
This is a circular label attached to the back side of the label 172, and the labels 186 and 187 consist of a black part and a reflective part. Each label 1 of this reel stand 171°172
Light emitting elements 190, 191 and light receiving elements 192, 193 are arranged on the printed circuit board 175 facing 86, 187.

Labels 186 and 187 from each light emitting element 190 and 191
Light is reflected towards. This light is label 186°18
The light receiving element 192°193 is reflected by the reflective part 7.
However, almost no light is reflected from the black parts of the labels 186 and 187. Therefore, the reel stand 171,
When 172 is rotating, the light receiving elements 192, 1
93 outputs a rectangular signal. On the other hand, reel stand 171
, 172 are stopped, the light receiving elements 192 ,
193 outputs a signal at a constant level. Reference numeral 189 denotes a cover plate screwed to the supports 188a and 168c of the substrate 1.

FIG. 14 shows how the motor 40. Branjean Lenoid 63. A control system for controlling electromagnets 163 and 164 is shown.

In FIG. 14, 200 is a central control unit (CPU);
It is a control circuit consisting of a read-only memo +7 (ROM), a writable and readable memo IJ (RAM), etc., and this control circuit 200 includes a detection means for detecting the state of the mechanical section,
That is, the cassette insertion detection switch 16. Cassette detection switch 176° Playback status detection switch 181. Light receiving element 183° 192, 193, changeover switch 179
．． Eject detection switch 16 and non-detection circuit 201
The output of is input. 202 is a first operation switch used to stop the operation and eject the cassette half from the device in an operating state such as a playback state or a recording state, and 2o3 is used to fast forward (FF) the magnetic tape. Second operation switch.

204 is a third operation switch used to fast-reverse (REW) the magnetic tape, and 205 is used to switch 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 fourth operation switch is used in various cases.

206 is a sixth operation switch used to temporarily interrupt playback during magnetic tape playback operation, etc.; 2o7;
is a sixth operation switch used when selecting a predetermined song from a plurality of songs recorded on the magnetic tape, and this sixth operation switch 207 and the second (or third) operation switch By using together with 203.204,
It is possible to automatically select multiple tracks or the previous song from the currently playing song. For example, the seventh operation switch 207
When the second switch 203 is operated and the second switch 203 is pressed three times, fast-forwarding (FF) is performed to the beginning of the next song. The outputs of the various detection means and the outputs of the various operation switches are input to the control circuit 200 (input port) 208. 20
Reference numeral 9 denotes a mechanism state detection means for detecting the output states of the various detection means described above.

Reference numeral 210 denotes a mechanism state determining means that determines the current state of the mechanism based on the detection result of the mechanism state detecting means 209, and the determination result of this mechanism state determining means 210 is transmitted to the control means 2.
11. Reference numeral 212 denotes supervisory means for monitoring the detection state of the mechanism state detection means 209. For example, this monitoring means 212 monitors whether or not a cassette is inserted, and after a predetermined period of time has passed, the state has shifted to the playback state. Ru. Reference numeral 213 denotes an abnormality determining means for determining whether the operation is normal or abnormal based on the monitoring result of the monitoring means 212, and the determination result of the abnormality determining means 213 is inputted to the control means 211. 2
Reference numeral 14 denotes voiced/unvoiced determining means for determining whether or not the reproduction output from the magnetic head continues for a predetermined period of time.
The determination result is input to the control means 211. Reference numeral 216 denotes key human power detection means for detecting whether or not the various operation switches 202 to 207 have been operated. Reference numeral 216 denotes key human power determination means for determining the next operation mode based on the detection result of the key human power detection means 215. The judgment result of the human power judgment means 216 is input to the control means 211. The control means 21
1 outputs various control signals based on the outputs of the respective means 213, 210, 214, and 216. This control signal is transmitted via output port 217 to motor drive circuit 218. Plunger drive circuit 219. Electromagnet drive circuit 220, 2
21, motor 40. Plunger solenoid 5
3. Electromagnets 163 and 164 are controlled.

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

4. Operation of transporting the cassette half from the cassette insertion section 58 to the playback position (see timing chart in FIG. 16).

When the cassette half is inserted into the cassette insertion portion 68, the cassette detection piece 18 is rotated clockwise by the inserted cassette half, and the cassette insertion detection switch 15 is closed (at time T1 in FIG. 15). Electric current is supplied to the plunger solenoid 53, and the movable iron core 64 of the plunger solenoid 63 is attracted against the biasing force of the spring 66. As the movable iron core 54 is attracted, the mode clutch lever 48 is driven by the pin 55 of the movable iron core 54, and the mode clutch lever 48 rotates to rotate the mode clutch lever 48, which is rotatably supported by the mode clutch lever 48. 3 gear 49
The gear portion 49L with a zero large diameter meshes with the first gear 42 press-fitted into the rotating shaft 41 of the motor 4o. When a predetermined period of time (for example, 100 m5) has elapsed after the force cent insertion detection switch 16 is closed (ON), current is supplied to the motor 40 (at time 12 in FIG. 15), and the rotation shaft of the motor 40 is turned on. 41 rotates clockwise (CW). The rotational driving force of this motor 4o is the first gear 42-third gear 49→
The transmission is transmitted from the fourth gear 60 to the fifth gear 61 to the sixth gear 52 to the rack 22 of the carriage 21, and the first carriage 21 is transferred backward (Y/force direction) while the cassette half is stopped. When the cassette is transported to a predetermined position, the cassette engaging pawl 25 of the carriage 21 engages with the hole edge of the tape exposed surface of the cassette...
At the same time, the cassette... is also transported rearward (in the Y' force direction).

When the carriage 21 is further moved rearward, the pinot 24 of the carriage 21 comes into contact with the cam part 36 of the cassette holding plate 35, causing the cassette holding plate 36 to rotate (in the direction of arrow R in FIG. 4), and the carriage 21 Since the bottle 1Q inserted into the cam groove 23 moves to the bent part 23a of the cam groove 23, the link 8 rotates, and the long bottle 11 fixed to the link 8 moves toward the substrate 1. Therefore, the long bottle 11 restricts the rotation toward the substrate 1, and the lid plates 30, 31 rotate toward the substrate 1. By the rotation of the force center presser plate 36 and the rotation of the lifter plates 30 and 31, the rearward-transferred case plate 7 is moved in the first direction (two directions) of the substrate. With the rotation of the cassette holding plate 3S and the rotation of the lifter plates 30 and 310, the cassette half descends in the direction of the board 1, and when it descends to a predetermined position,
The flexible plate 178 is pushed by the cassette half, and this flexible plate 178 further pushes the cassette detection switch 17
The movable piece 177 of 6 is driven, and the cassette detection switch 1
76 is closed (at time 14 in FIG. 15), it is detected that the cassette half is set at the playback position.

By the above operation, the inserted case recorder)...-7 is set at the playback position.

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

When cassette No.-7 is set to the playback position and the cassette detection switch 176 is closed, the current supply to the motor 40 is cut off, and the rotation of the motor 40 is stopped.
The current supply to the plunger solenoid 63 is cut off.

Therefore, the movable iron core 54 of the plunger solenoid 53 is pulled out by the urging force of the spring 56, and the mode clutch lever 48 is rotated clockwise, causing the third gear 49 and the first gear 42 to The mesh becomes disengaged, resulting in a non-meshing relationship.

With the clockwise rotation of the mode clutch lever 48,
A clutch lever 62 connected to this mode clutch lever 48 rotates clockwise, and this clutch lever 62
The large-diameter gear portion 63L of the eighth gear 630 rotatably supported by the second gear 43 meshes with the second gear 43.

After the cassette detection switch 176 is closed, a predetermined period of time (
For example, after 100 m5) has elapsed (time 15 in FIG. 16), current is supplied to the motor 40, and the motor 40 rotates clockwise (CW).

When the motor 40 rotates clockwise, the rotational driving force of the motor 40 is transferred from the rotation shaft 41 of the motor 40 to the first gear 42.
- pawl 44 - second gear 43 - eighth gear 63 - seventh gear 61 - ninth gear 66 - tenth gear 68, and the tenth gear 68 is shown in FIG. Rotate clockwise from the state shown.

As the tenth gear 680 rotates clockwise, the lever 70 moves and the sliding lever 7 is slidably supported on the base plate 1.
2 slides in the Y direction.

As the sliding lever 72 slides in the Y direction, the bottle 74 installed on the sliding lever 72 comes into contact with the link 84,
Rotate this link 84 clockwise (see Figure 7)
. Since the drive pin 143 fixed to the head shear 7121 is inserted into the elongated hole 88 of the link 84, the drive pin 143 is driven as the link 84 rotates clockwise, and the head chassis 121 is moved by the spring 121S. moves in the direction of arrow X against the urging force of. As the sliding lever 72 further slides in the Y direction, the output of the light receiving element 183 decreases (point 16 in FIG. 16), and the changeover switch 179
The movable piece 180 is driven in the Y direction by the drive piece 7sb of the sliding bar 2, and the changeover switch 179 is switched (time 17 in FIG. 15).

When the tenth gear 68 rotates nearly 90° clockwise from the state shown in FIG. 13 (8), the drive pin 143 driven in the direction of arrow Status detection switch 181
is closed (time point 18 in Fig. 1S). Furthermore, as the tenth gear 68 rotates clockwise, the sliding lever 72 that had been sliding in the Y direction begins to slide in the Y' direction, and the link 84 begins to rotate counterclockwise. , the reproduction state detection switch 181 is opened, and the output of the light receiving element 183 increases (time 19 in FIGS. 1 and 5). As the slide lever 2 further slides in the Y' direction, the output of the light receiving element 183 decreases (at time 118 in FIG. 15). When the sliding lever 72 passes through the state shown in FIG. 13(B) K and further rotates clockwise, the pin 73 of the sliding lever 72 contacts the link 85.
This link 85 is rotated counterclockwise to drive the drive pin 143 of the head palm 121 again in the direction of arrow X.

When the tenth gear 68 further rotates clockwise from the state shown in FIG.
11 point in the figure). The 1st o gear 68 further rotates,
When rotated approximately 90° clockwise from the state shown in FIG. 13(B), the regeneration state detection switch 181 is closed by the drive pin 143, and current is supplied to the electromagnets 163 and 164 (at point 112 in FIG. ). Electromagnet 163,
164, the gear 68 of the suction member 93° of the rotary lever 90.91 further rotates clockwise, the sliding lever 72 again begins to slide to the left, and the link 86 moves clockwise. The rotary lever 90. is rotatable, but the roller 131 of the head chassis 121 is held in the closed state.
Since the position is regulated by 91, the head chassis 121
does not return to arrow X' due to the biasing force of spring 121S. When the first o gear 68 rotates once from the state shown in FIG. 13 (8) and returns to its original position, the output of the light receiving element 183 increases again (at time "13" in FIG. 15). When the output rises for the second time, the supply of current to the motor 40 is cut off, and the rotation of the motor 40 is stopped.

When a predetermined period of time (for example, 1 ooms) has elapsed since the second rise (T13) of the output of the light receiving element 183, the motor 40
rotates counterclockwise (point ``14'' in Figure 15).

As the head chassis 121 moves in the direction of the arrow X, the pins 155 and f56 inserted into the holes 141 and 142 of the henodonya/121 are driven, so the pinch roller support arms 151 and 152 are rotated. The pinch rows 2153 and 154 are connected to the capstan shaft 159,
160. Also, the headsha
The magnetic head 122 attached to 7121 also approaches the magnetic tape inside the cassette.

Further, while the tenth gear 68 makes one rotation clockwise from the state shown in the thirteenth section, the lever 81 connected to the sliding lever 72 via the rotating lever 71 slides back and forth one time from side to side. . Therefore, the sliding plate 144 is first moved in the left direction (Y direction) and then in the right direction (Y/
The tenth gear 68 is driven further to the left in the force direction, and the tenth gear 68
When it rotates and returns to its original state, the sliding plate 144 moves to the left (Y
direction). Sliding plate 14
One end of a wire 147 is supported by the support 146 of No. 4, and this wire 147 is inserted into a hole 149 of a bent piece 148 of the board 1, and the other end is inserted into a hole 119 of a bent piece 118 of the idler gear plate 112. Therefore, when the sliding plate 144 is driven in the left direction (Y direction), the wire rod 147 is attached to the substrate 1.
counterclockwise with the bent piece 148 of the
), the idler gear plate 112 is rotated clockwise, and the fourteenth gear 116 rotatably supported by the idler gear plate 112 is connected to the flywheel 161.
The thirteenth gear 11 meshes with the small diameter gear portion 161S and is rotatably supported by the idler gear plate 112.
4 meshes with the gear portion 174 of the reel stand 172.

The tenth gear 68 is moved 360 degrees from the position shown in FIG.
In the rotated position, springs 104, 106
The rotation of the rotation arm 100 and the rotation of the rotation arm 1o1 due to the biasing force of
, 126, in the state shown in FIG. 13(8), the 11th. 12th gear 110, 11
1 is a large diameter gear part 16 of flywheels 161, 162
1L, 162L and the gear portions 173 and 74 of the reel stands 171 and 172 do not mesh with each other.

As described above, when the tenth gear 68 rotates 360' from the state shown in FIG. 13 (8) and returns to its original state (time point 113 in FIG. (b) The magnetic tape in the cassette half is held between the vinyl and capstan shafts, the magnetic head is in contact with the magnetic tape, and (C) the small diameter of the flywheel 161 The gear portion 161S of and the fourteenth gear 115 and the ↑3rd gear 114 mesh with the gear portion 174 of the reel stand 172, respectively. , 161 and the gear portions 174 and 173 of the reel stand 172 and 171, the clockwise rotation of the motor 4o is stopped.

After a predetermined period of time (for example, 1 ooms) has elapsed from this state, current is supplied to the motor 4o, and the motor 40 rotates counterclockwise (time 114 in FIG. 15).

When the motor 40 rotates counterclockwise, the rotational driving force of the motor 4o is transmitted to the flywheel 161 via the first gear 42 - pawl 46 - gerry 46 - belt 186 -> ghee 184.
, 162, the flywheel 161 rotates counterclockwise, and the flywheel 162 rotates clockwise.

The rotational driving force of the flywheel 161 is generated from the 14th gear 115 that meshes with the small diameter gear portion 161S of the flywheel 161 → the 16th gear 117 → the 16th gear 116
→It is transmitted via the thirteenth gear 114 to the gear portion 174 of the reel stand 172 with which the thirteenth gear 114 meshes, and the reel stand 172 rotates clockwise. Therefore, the reel built in the cassette half that engages with the reel stand 172 rotates clockwise, causing the magnetic tape inside the cassette to run, and
The surface is regenerated.

(Operation of shifting from Q side A playback state to fast forward (FF) state (see timing chart in Fig. 16)) In the playback state of side 18, the operation switch 203 for fast forward (FF) is operated (see the timing chart in Fig. 16). T1 point in the figure), the counterclockwise rotation of the motor 40 stops, and the electromagnet 1
The current supply to 63 and 164 is cut off (1 in Figure 16).
2 time points). Therefore, the adsorption of the adsorbent body 94.93 by the electromagnets 163 and 164 is released, and the rotating lever 90.9
1 becomes rotatable. For this reason, the rotation lever 90.91
The roller 13 whose movement in the direction of arrow X' was restricted by
1 moves in the direction of arrow X' due to the biasing force of the spring 121S. As a result, the regeneration status detection switch 181 is opened (OFF) (at time 12 in FIG. 1e). After a predetermined period of time (for example, 100m5) has passed from point 12, the paper
At 4 o'clock in the evening, it begins to rotate clockwise (time 73 in Figure 16). Therefore, the tenth gear 68 rotates once in the clockwise direction. At time T1° during one rotation of the tenth gear 68, that is, at the time when the head chassis 121 is driven in the direction of arrow X and the regeneration state detection switch 181 is closed,
Current is supplied only to electromagnet 164. After that “11
The rotation of the motor 40 stops at this point, that is, at the moment when the output of the light receiving element 183 rises. Here, the movement of the roller 131 between T1° and T14 will be explained. At T1°,
At this time, the row 2131 is in the state where it has moved the most in the direction of the arrow X as shown in FIG. Rotation of 90 is restricted. However, since no current is supplied to the other electromagnets 163, the rotary lever 91 is rotatable. Then the first
The link 85 rotates clockwise in accordance with the rotation of the gear 68, and the bed shear 121 moves in the direction of arrow X'. According to the movement of this head chassis 121, the roller 13
1 also moves, but only the rotating lever 91 is rotatable, so the roller 131 moves along the inclined surface 96 of the rotating lever 90, rotates the rotating lever 91, and the roller 131 moves the substrate 1. The edge of the keyhole-shaped hole 132 and the rotating lever 90
Movement in the direction of arrow X' is restricted by the inclined surface 96 (FIG. 1(B)). Note that in the state shown in FIG. 1B, compared to the state shown in FIG. 1A, the magnetic head 122
Although it is slightly set back, it is possible to touch the magnetic tape and cue the beginning of the song selection. When the rotating lever 91 is rotated by the roller 131, the rotating arm 1
01 is rotated clockwise, and the twelfth gear 111 supported by the rotation arm 101 is connected to the gear portion 1 of the reel stand 171.
73 and the large diameter gear portion 161 of the flywheel 161
It will not mesh with L. On the other hand, since the bin 1o8 of the rotating arm 100 enters the recess 126a of the cam hole 126 of the belly button chassis 121, the eleventh gear 110 supported by the rotating arm 100 is moved to the gear portion 174 of the reel stand 172.
and meshes with the large diameter gear portion 162L of the flywheel 162. In addition, in this state, the idler gear plate 1
The 12 pins 120 are connected to the elongated hole 1 of the head chassis 121.
27a, the first idler gear plate 112
3. The fourteenth gears 114, 116 are the reel stands 172, 1
Gear parts 174 and 173 of 71 and flywheel 1
62 and 161, which do not mesh with the small diameter gear portions 162S and 161S. Thereafter, the rotation of the motor 40 stops at time T11. When the rotation of the motor 40 stops and a predetermined period of time (for example, 100 m5) has elapsed, the motor 40 rotates counterclockwise (time T1□ in FIG. 16), and this rotational driving force is transmitted via the belt 186 to the flywheels 161,
62, and the rotational driving force of the flywheel 162 is further transmitted to the large diameter gear portion 162L- of the flywheel 162.
The signal is transmitted from the eleventh gear 110 to the gear portion 174 of the reel stand 172, and fast-forwards the magnetic tape.

(D) Operation of shifting from the A side playback state to the fast rewind (REW) state (see timing chart in FIG. 16).

When the operation switch 204 for fast rewind 1'1EW) is operated, the operation of shifting from the A-side playback state to the fast-reverse REW) state is performed from the A-side playback state to the fast forward p(FFFF) state shown in FIG.
) state, except that current is supplied only to the electromagnet 163 at time 118 in FIG. When current is supplied only to the electromagnet 163 at time 118 in FIG.
The rotation of is regulated. On the other hand, since the rotary lever 90 is in a rotatable state, when the row 2131 moves in the direction of arrow X', the rotary lever 90 is rotated clockwise (FIG. 7) by a-2131. As a result, the rotating arm 10
0 is rotated via the sliding lever 98, and the eleventh gear 110 supported by this rotation arm 100 is rotated by the reel stand 1.
72 and the large diameter gear portion 162L of the flywheel 162. On the other hand, in this state, the bin 109 of the rotating arm 101 enters the recess 126a of the cam hole 126 of the head chassis 121, so the twelfth gear 111 supported by the fibrillation arm 101 It meshes with the large diameter gear portion 161L of the flywheel 161. As a result,
When the motor 4o starts to rotate counterclockwise at point 12 in FIG. ) action is performed.

(E) Operation of shifting from the A-side fast forward (FF) state to the A-side playback state (see timing chart in Figure 17)
.

In the fast forward p (FF) state of side A, when the operation switch 202 for K and stop (STOP) is operated in order to end this fast forward state (at time T1 in FIG. 17), the motor 40 is turned off after a predetermined time. When the rotation of the electromagnet 16 stops, the electromagnet 16
4 is cut off (at time 12 in FIG. 17).

After a predetermined period of time (for example, 100 m5) has elapsed, the motor 40iC current is supplied and the motor 40 rotates clockwise (time 13 in FIG. 17). Therefore, the tenth gear 68 rotates once and stops at T1°. During this time, at time 19, the regeneration state detection switch 181 is closed and current is supplied to the electromagnets 163 and 164. Therefore, the roller 131 is moved by the rotation lever 90°91.
Movement in the direction of the arrow
is held at the playback position. For this reason, T1 in Figure 17
When the motor 40 starts rotating counterclockwise at point 1, A
The surface is regenerated.

(F) Operation of shifting from the A-side playback state to the 3-side playback state (see timing chart in FIG. 18).

As shown in FIG. 18, when the program switching operation switch 206 is operated in the A-side playback state (time point 14 in FIG. 18), the rotation of the motor 40 is stopped at time point 12 after a predetermined time. , electromagnet 163 , 1
The current supply to 64 is cut off. After that, after a predetermined period of time (for example, 1 ooms) has elapsed, current is supplied to the motor 40, and the motor 40 rotates clockwise (1 ooms in FIG. 18).
3 time points).

Therefore, the tenth gear 68 rotates approximately 1800 degrees clockwise.
It rotates and stops at the T7Vj point. During this time, the changeover switch 179 is switched at time 16, and the regeneration state detection switch 181 is closed at time 16, and the electromagnets 163, 16
4 is supplied with current. 10th gear 6 between 13 and 17
8 is in the right direction (Y
'Driven in the force direction. For this reason, the idler gear plate 11
2 is driven counterclockwise, the thirteenth gear 114 of the idler gear plate 112 meshes with the small diameter gear part 162S of the flywheel 162, and the fourteenth gear 116 meshes with the gear part 173 of the reel stand 171. For this reason, the 18th
When the motor 4o rotates counterclockwise at point 18 in the figure,
The rotational driving force is Bell) 185-7 Rye Wheel 162
The signal is transmitted to the 13th gear 114, the 15th gear 116, the 16th gear 117, the 14th gear 116, and the reel stand 171, and the magnetic tape is run to reproduce the B side.

IC1) Operation of shifting to side B playback state at the end of side A (
(See timing chart in FIG. 19).

As shown in FIG. 19, in the reproduction state of side A, since the reel stands 171 and 172 are rotating, the light receiving element 1
92, a rectangular signal is output. Here, at the end of side A (time T1 in FIG. 19), the reel stand 171,
172 stops rotating, and the light receiving element 192 no longer outputs a rectangular signal. In the A side reproduction state, the timer of the control circuit is reset at the falling edge of the output of the light receiving element 192, and when the rotation of the reel stand 171 stops and the timer cannot be reset, the timer counts up. When the timer counts up to a predetermined value, the current supply to the motor 4o is cut off, the rotation of the motor 4o is stopped, and the current supply to the electromagnets 163 and 164 is cut off (time 12 in FIG. 19). In this case, the roller 131, whose movement in the direction of the arrow X' has been restricted by the rotation levers 90 and 91, moves in the direction of the arrow X' together with the head shear 121 due to the biasing force of the spring 121S. Therefore, the reproduction state detection switch 181 is opened. After that, when a predetermined period of time has passed, current is supplied to the motor 40, and the motor 40 rotates clockwise (19th
(time point 13 in the figure). Therefore, the tenth gear 68 rotates 180 degrees clockwise and stops at time T. During this time, 1
At time 3, the switching switch 179 is switched, and at time 16, the regeneration state detection switch 181 is closed, and current is supplied to the electromagnets 163 and 164. Further, the tenth gear 68 rotates clockwise by 1
During 800 rotations, the sliding plate 144 slidably supported by the head 7 palm 121 is driven in the right direction (Y' force direction) by the pin 83 of the lever 81, so the idler gear plate 112 is moved by the wire rod 147. , the thirteenth gear 114 is driven counterclockwise and meshes with the small diameter gear portion 162S of the flywheel 162, and the fourteenth gear 116 meshes with the gear portion 173 of the reel stand 171. As a result, 18
When the motor 4o rotates counterclockwise at this point, this rotational driving force is transmitted from the belt 185 to the flywheel 162 to the first
3rd gear 114 → 15th gear 116 → 16th gear 1
17-The fourteenth gear 115-IJ-is transmitted to the wheel base 171, and the B side is brought into the reproducing state.

(c) Stopping the reproduction state of side A or B and ejecting the cassette half (see timing chart in FIG. 20).

When side A (or side B) is being played,
JEcT ) operation switch 202 (second
After a predetermined period of time, the motor 40 stops rotating and the current supply to the electromagnets 163 and 164 is cut off (at time 12 in FIG. 20).

Therefore, the head 7 palm 121 moves in the direction of the arrow X', and the reproduction state detection switch 181 opens.

Further, since current is supplied to the plunger blenoid 53 at time point 12, the mode clutch lever 48 is rotated counterclockwise, and the clutch lever 62 is rotated counterclockwise by the mode clutch lever 48. Ru. Therefore, the third gear 49 supported by the mode clutch lever 48 meshes with the first gear 42 fixed to the rotating shaft 41 of the motor 40, and the eighth gear 49 supported by the clutch lever 62 meshes with the first gear 42 fixed to the rotating shaft 41 of the motor 40. Large diameter gear s3L of gear 63 and second gear 43
The mesh is released. When a predetermined period of time (for example, 100 m5) has elapsed from point 12, the motor 40 begins to rotate counterclockwise (point 13 in FIG. 20).

In this case, the rotational driving force of the motor 4o is transferred to the third gear 49.
→ Fourth gear 5o → Sixth gear 51 → Sixth gear 52-
The signal is transmitted to the rack 22, and the carriage 21 moves in the direction of arrow Y. As the carriage 21 moves in the direction of arrow Y,
Since the cassette holding plate 35 rotates and the link 8 rotates clockwise, the lifter plates 30 and 31 rotate in a direction away from the substrate 1 (in a direction in which the leg opening angle of the lifter plates 30 and 31 becomes smaller). Therefore, the cassette is moved in a direction away from the substrate 1. This is 14 in Figure 20.
At this point, the cassette detection switch 176 is open (O
FF). Thereafter, the cassette half is transported by the carriage 21 in the direction of the arrow Y, and at the time point 15, the cassette insertion detection switch 15 is opened (OFF)j, and then the cassette half is turned OFF at the time point 15.
At this point, the eject detection switch 16 is open (OFF) L.
, the current supply to the motor 4° is cut off, and the current supply to the Branjan renoid 63 is also cut off, thereby completing the ejecting operation.

Note that the other operations are operations that are partially different from each of the above operations, and since the details can be understood from the above operations, the details will be omitted.

Effects of the Invention According to the present invention, the head shear is moved by a pair of rotating levers held in a closed state against the biasing force of an elastic body.
Alternatively, the head chassis is directly positioned by one rotary lever held in the closed state and the edge of the hole in the board, compared to the conventional method in which the head chassis is indirectly positioned via multiple arms, levers, etc. This improves positioning accuracy during recording, playback, or fast forwarding or fast reversing.

[Brief explanation of drawings]

Figures 1 (A), (B), (C1 is a diagram showing the basic operation of a magnetic recording and reproducing device in an embodiment of the present invention, Figure 2 is a perspective view of the front side of the same device, and Figure 3 is a diagram showing the same. Figure 4 is an exploded perspective view of the front side of the device, Figure 5 is an exploded perspective view of the back side of the device, Figure 6 is an exploded perspective view of the vicinity of the motor of the device, Fig. 7 is an exploded perspective view of the main part of the magnetic tape running mode switching mechanism of the same device, Fig. 8 is an exploded perspective view of a part of the same device, and Fig. 9^, (G) is an exploded perspective view of the main part of the magnetic tape running mode switching mechanism of the same device. Top and bottom views of gear 42', No. 10
Figure (8) is a top view of the second gear 43 used in the same device, Figure 10 (B) is a bottom view of the pulley 46 used in the same device, and Figures 11 (A) and (B) are the second gear 43 used in the same device. Figure 12 is a perspective view of the flywheel used in the device; Figure 13 is a diagram showing the relationship between gears, pulleys, and pawls in Figure 1; Figure 13 is a part of the magnetic tape running mode switching mechanism of the device. An explanation diagram of the operation,
FIG. 14 is a block diagram of the control system of the same device, and FIGS. 15 to 20 are timing charts of the same device. 1... One board, 16... Cassette insertion detection switch, 16... Eject detection switch, 21... Carriage, 22... Rack, 30.31... Lifter plate, 36... Cassette holding plate, 40...Motor, 41...Rotating shaft, 42...First gear, 43...Second gear, 44...Claw, 45
-Pulley, 46...-Claw, 48...-Mode clutch lever-149-...-Third gear, 5o
...Fourth gear, 51...Fifth gear, 52
...Sixth gear, 53...Brandienrenoid, 61-...Seventh gear, 62...Clutch lever 163...-Eighth gear, 66... 9th gear, 68-・10th gear, 7o... Lever, 7
2...Sliding lever, 73.74...Bin, 77
... Rotating lever ~, 84.85- Link, 90.9
1.--Rotating lever, 93, 94--Adsorption body, 98.
...Sliding lever, 100, 101...Rotating arm, 110・Eleventh gear, 111--Twelfth
Gear, 112... Idler gear plate, 114...
...13th gear, 115...14th gear, 1
16...16th gear, 117...16th gear
gear, 121...head chassis, 122...
・Magnetic head, 129... Arm, 131...
・Rollers, 137, 138...- Bearings, 143・
...Drive bin, 144...Sliding plate, 147...
-... Wire rod, 153, 154... Pinch roller, 159, 160... Capstan shaft, 16
1゜162...Flywheel, 163, 164
--=electromagnet, 171,172... reel stand,
176...Cassette detection switch, 179...
...Changing switch, 181...-Regeneration state detection switch, 184...Pulley, 185...Belt, 200...Control circuit, 202-207...
...Operation switch. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 8
Fig. 9 Fig. 10 Fig. 11 Fig. 12 Fig. 13 Fig. 15 Mangoku Ts Ta million million to 1 chi 4 Fig. 15 4 item recycling -Fast forward (FF)-77ta7JT41 Le hno nonnL] Fig. 17 Fig. 18 Fig. 19 Fig. 11 ■ Ill stone hshiman1'4 TtTeman Fig. 20

Claims (1)

[Claims] A head chassis slidably supported by a substrate, an elastic body that biases the head chassis in one direction, a drive means that drives the head chassis against the biasing force of the elastic body, and the head chassis an engaging member provided on the board; a pair of rotating levers supported on the base plate so as to be able to open and close;
The rotary lever is equipped with an adsorbent provided on the rotary lever and a pair of electromagnets that adsorb each of the suction bodies and hold each of the rotary levers in a closed state, and the head chassis is biased by the elastic body. The engaging member is locked by a pair of rotating levers held in the closed leg state, or by one rotating lever held in the closed leg state and the edge of the hole into which the engaging member is inserted. A magnetic recording and reproducing device.