JPS6128271Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for a tape recorder, and is particularly suitable for a cassette tape recorder.

Generally, a drive mechanism shown in FIG. 15 is used in a cassette tape recorder. In FIG. 15, 200 is a reel stand on the supply side, 201 is a reel stand on the take-up side, and 202 is a flywheel connected to the capstan. 203 is a drive idler, and this idler is rotatably attached to arm 204. This arm 204 is rotatably attached to a substrate (not shown) using a fulcrum 205. 206 is the above idler 203
Another arm is rotatably attached to the arm 204 concentrically with the arm 204, and driven idlers 207 and 208 are rotatably attached to the arm. Pulleys 209, 210, 211 are integrally fixed to the idlers 203, 207, 208, respectively, and these pulleys 209, 210, 21
A rubber belt 212 is wrapped around 1. 21
Reference numeral 3 denotes a crimp lever, which is rotatably attached to the substrate with 214 as a fulcrum, and this crimp lever 2
A leaf spring 215 is fixed to 13. 21
Reference numerals 6 and 217 indicate slide levers, which are slid in the directions of arrows A and B by rewinding and fast forwarding operations, respectively.

In the above drive mechanism, the lever 216 is slid in the direction of arrow A and the arm 204 is rotated clockwise by the tape rewinding operation. Arm 2
04 in the clockwise direction, the idler 203
is pressed against the circumferential surface of the flywheel 202 and rotated clockwise, and this rotation causes the belt 212 to
The idler 207 is rotated counterclockwise and the idler 208 is rotated clockwise. By sliding the lever 216 in the direction of arrow A, the leaf spring 215
is pressed, the pressing lever 213 is rotated clockwise, and this rotation causes the arm 20
No. 6 protrusion 218 is pressed. The arm 206 is rotated counterclockwise by this pressure, and the idler 207 is pressed against the circumferential surface of the reel stand 200. The idler 207 rotates the reel stand 200 and the tape is rewound. Further, by the operation of fast forwarding the tape, the lever 217 is slid in the direction of arrow B, and the arm 204 is rotated clockwise. This rotation of the arm 204 causes the idler 20 to
3 is pressed against the flywheel 202 and rotates,
Due to this rotation, the idlers 207 and 208 also rotate as described above. As the lever 217 slides in the direction of arrow B, the leaf spring 215 is pressed, the crimp lever 213 is rotated counterclockwise, and the arm 206 is rotated counterclockwise.
is rotated clockwise, and the idler 208 is pressed against the reel stand 201. As a result, the reel stand 20
1 is rotated and the tape is fast-forwarded.

In such a drive mechanism, rotation is transmitted from pulley 209 to pulleys 210 and 211 via belt 212. Therefore, the angle at which the belt 212 wraps around the pulley 207 is small, resulting in a drawback that slippage occurs between the belt 212 and the pulley 207.

The present invention provides a drive device for a tape recorder that eliminates the above-mentioned drawbacks.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the front side of the mechanical section of the cassette tape recorder, and shows the front side of the board 1. As shown in FIG. Well-known reel shafts 4 and 5, which will be described later, protrude from holes 2 and 3 formed in the substrate 1.
Further, a shaft 8 is attached to the metal fittings 6 and 7 fixed to the substrate 1.
A recording keyboard 9, a rewind keyboard 10, a stop keyboard 11, a play keyboard 12, a fast forward keyboard 13, and a pause keyboard 14 are rotatably attached to the shaft 8.

The reel shafts 4 and 5 are connected to the substrate 1 shown in FIG.
a sub-board 1 fixed to the board on the back side of the board;
5 and 16 so as to be rotatable. The reel shaft 4 has a drum 1 that rotates integrally with the reel shaft.
7 is attached to the reel shaft 5, and a small diameter drum 18 (see FIG. 13) that rotates integrally with the reel shaft 5 and a friction clutch (not shown) connected to the reel shaft 5 are attached.
A large-diameter drum 19 is attached, which is connected via a.

The above-mentioned keyboards 9 to 14 have almost the same shape, and the third
As shown in the figure for the reproduction keyboard 12, its tip end is inserted into the hole 20 of the substrate 1. This keyboard 1
2 is manually pressed to rotate it counterclockwise in FIG. 3, the sliding plate 21 described later
is slid upward. Keyboard 9, 10, 11, 1
Similar to the keyboard 12, the tips of the keys 3 and 14 are connected to the holes 22, 23, 24, 25, 2 of the board 1 as shown in FIG.
6, and the above-mentioned sliding plate 21 is slid upward against the spring 27 (see Fig. 5) by rotation by pressing the keys 9, 10, 13, and 14. As a result, the sliding plates 28, 29, 30, 31 are respectively slid upward against the springs 32, 33, 34, 35 (see FIG. 6). Sliding plate 2 above
1, 28, 29, 30, and 31 are slidably attached to the substrate 1, as is well known.

In FIG. 1, reference numeral 36 denotes a head stand, to which an erasing head 37 is attached as well known, and a recording/reproducing head 38 is attached via a sub-board 39 as well known. Above head stand 3
As shown in FIG. 5, reference numeral 6 denotes a plate spring fixed to the substrate 1 and placed on steel balls 43, 44, 45 guided by guides 40, 41, 42 protruding from the front side of the substrate 1. 46, the balls 43, 44, 4 through the well-known steel ball 52.
It is pressed to 5. Further, the head stand 36 is configured to be slidably guided in the vertical direction with respect to the substrate 1. Reference numeral 47 denotes a spring, which is stretched between the head stand 36 and the sliding plate 21, and the biasing force of the spring 47 causes the rising part 48 of the sliding plate 21 to come into contact with the protruding part 49 of the head stand 36. being touched. Therefore, when no pressing force is applied to the sliding plate 21 by the keyboard 12, the head stand 36 and the sliding plate 21 can slide together, and the spring 27
The head stand 3 is biased via the sliding plate 21 by
6 is in contact with a stopper 50 embedded in the substrate 1. The head stand 36 includes a contact portion 53 that can be pressed by a pin 51 (described later), a column 55 around which a coil spring 54 is wound, and a pinch roller 5 (described later).
An upright portion 58 is provided on which the arm 57 of No. 6 comes into contact. Arm 57 of the pinch roller 56
is rotatably attached to the base plate 1 with a fulcrum 59 as shown in FIG. 1, and is urged counterclockwise against the head stand 36 by the spring 54.
Due to this bias, the arm 57 is brought into contact with the rising portion 58. 60 is a capstan against which a tape (not shown) is pressed by the pinch roller 56 in a well-known manner. Reference numeral 61 denotes a guide hole provided in the head stand 36, through which a shaft 62, which will be described later, is inserted and guided.

In FIG. 1, 63 is a sliding plate, which is slidably attached to the base plate 1 as is well known.
The sliding plate 63 is biased in one direction by a traction spring 64. An operating pin 67 of an electromagnetic plunger 66 attached to the back side of the base plate 1 as shown in Fig. 2 is fitted into a hole 65 in the sliding plate 63, and the sliding plate 63 is slid against the spring 64 by excitation of the plunger. An arm 69 is attached to the sliding plate 63 so as to be rotatable about a fulcrum 68, and a cam 71 is attached to the sliding plate 63 so as to be rotatable about a fulcrum 70. A spring 72 is stretched between the arm 69 and the sliding plate 63, and the arm 69 is biased by the spring, so that the arm 69 abuts against a rising portion 73 of the sliding plate 63 due to the bias. 74 is a rising inclined portion of the arm 69. A spring 75 is stretched between the cam 71 and the sliding plate 63, and the cam 71 is biased by the spring 72.
The cam 71 is brought into contact with the rising portion 76 of the sliding plate 63 by the biasing force of the cam 71. The cam 71 has pressing edges 78 and 79 which can press the rising portion at the end of the arm 77 which will be described later.
The notch 80 formed between these pressing edges
A pin 81 is fixed so as to penetrate the cam 71.
A lock plate 82 is attached to a pin 83 fixed in the base plate 1 so as to be rotatable and pivotable in the tilt direction, forming a well-known push-push mechanism. A spring 84 urges the lock plate 82 counterclockwise and in the tilt direction so as to approach the base plate 1.
is a stopper for the spring 84, which is fixed to the base plate 1. 86 is a stopper for the lock plate 82,
It is fixed to a substrate 1.

The electromagnetic plunger operates when the power supply current is supplied, when the end of the tape is detected, or when the set display of the tape counter is detected.
and/or) is excited only momentarily when a specified running position of the tape is detected, such as when a no-signal portion between songs recorded on the tape is detected, and is not well-known. be.

Reference numeral 87 denotes a pin implanted in the sliding plate 31, and when the sliding plate 31 is slid against the spring 35 by operating the keyboard 14, it is fitted into the notch 88 of the locking plate 82. , the sliding plate 31 is held at the above-mentioned slid position. When the sliding plate 31 is slid in a direction against the spring 35 in this state, the pin 87 is removed from the notch 88 and returns to the state shown in FIG. The sliding plate 31 has an upright portion 89 that can come into contact with the end of the arm 57, and a hole 92 having an inclined edge 90 and into which a pin 91 (described later) is inserted.

93 is an arm, which supports the board 1 with 94 as a fulcrum.
It is rotatably attached to the head stand 36, and a spring 95 is stretched between it and the head stand 36. Reference numeral 96 is a stopper for the arm 93, which is fixed to the substrate 1. The rising part 97 of the arm 93 is the head stand 36.
The arm 93 is rotated by the head stand 36 sliding against the spring 27 as described above. Further, the aforementioned pin 91 can be brought into contact with the end of the arm 93.

Reference numeral 99 denotes an arm, which is rotatably attached to the substrate 1 using 100 as a fulcrum, and has a pin 101 implanted therein. Since this pin 101 faces the beveled edge 102 of the sliding plate 31 and the cam 71, when the sliding plate 31 is slid against the spring 35 as described above, the pin 101 is pushed by the beveled edge 102. The arm 99 is rotated clockwise, and this rotation pushes the cam 71 via the pin 101.
is rotated against the spring 75.

In FIG. 2, a lock plate 103 is rotatably attached to a shaft 106 attached to the substrate 1 via metal fittings 104 and 105. As shown in FIGS. 3 and 7, a sub-lock plate 107 is rotatably attached to this shaft 106. The lock plate 103 and sub-lock plate 107 have protrusions 108, 109, 110 and 11, respectively.
1 and 112 are integrally protruded, and a lock plate 103
is biased toward the substrate 1 (clockwise in FIG. 8) by a spring 113 shown in FIG.
Reference numeral 114 denotes a substantially L-shaped protrusion protruding from the lock plate 103, which protrudes from the window 115 of the sub-lock plate 107, as shown in FIG. 11
Arms 6 and 117 are rotatably attached to the sub-lock plate 107 using fulcrums 118 and 119, respectively. These arms 116,1
The end of the pin 17 is connected to the pin 12 implanted in the arm 116.
0 and the elongated hole 1 of the arm 117 into which the pin is loosely fitted.
21, and is urged by a traction spring 122 stretched between the arm 116 and the sub-lock plate 107. This bias causes the ends of the arms 116, 117 to come into contact with the protrusion 114 as shown in FIG.

FIG. 4 shows the state in which the lock plate 103 and the like have been removed, and the holes 22, 23, 24, 20, 2
Keyboards 9, 10, 11, 1 from 5 and 26 respectively
2 and 13 are protruded. These keys 9-1
3 is the protrusion 10 of the lock plate 103 or sub-lock plate 107, as shown for the keyboard 12 in FIG.
8, 109, 110, 112, 110, and by the aforementioned pressing operation of the keys 9, 10, 12, 13, the ends of these keys rotate the lock plates 103, 107 against the spring 113. Shitsutsutsu protrusion 1
08, 109, 112, 110, and the keyboards 9, 10, 12, 13 can be kept in an operating state. The upper end of the abutted protrusion 111 of the keyboard 11 is connected to other protrusions 108, 109, 110, 112.
Even when the keyboard 11 is operated, the end of the keyboard does not reach the upper end of the protrusion 111, and the keyboard 11 is not held at the operating position. When the keyboards 9, 10, 11, 12, 13 are pressed, the protrusions 108, 109, 11
1, 112, 110 are pressed and the lock plate 103
is rotated against the spring 113, so that the protrusion 10
Keyboard 9 at the upper end of 8, 109, 112, 110,
When the ends of 10, 12, and 13 run over and are held in the operating position, this holding is released.
Further, when the keyboard 10 or 13 is pressed and its end runs on the upper end of the protrusion 109, 110, the arm 116, 1 is moved by the end of the keyboard 10, 13.
17 is pressed in a direction against the spring 122, and as a result of this pressing, the ends of the arms 116 and 117 are disengaged from the protrusion 114, and the lock plate 103 and sub-lock plate 107 rotate independently as shown in FIG. You will get it. Note that the keyboard 11 has an independent return spring (not shown).

As shown in FIGS. 6 and 8, a protruding portion 193 is fixed to the lock plate 103, and the protruding portion protrudes to the front side of the substrate 1 through a window 194 of the substrate 1, and on this front side, the arm 77 can be abutted against. This arm 77 is rotatably attached to the substrate 1 with 195 as a fulcrum.

In FIG. 2, 123 is a drive idler, and an arm 125, which is rotatably provided on the base plate 1 with 124 as a fulcrum, has a first drive idler with a shaft 126 as the center.
As shown in Figure 0, it is rotatably provided. A gear 127, a pulley 128, and a support arm 129 are rotatably attached to this shaft 126, and the gear 127 and pulley 128 are integrally formed. Further, a friction member 130 is interposed between the idler 123 and the gear 127 to constitute a well-known friction clutch. The shaft 62 is fixed to the support arm 129, and the shaft has a gear 131,
Idler 132, pulley 133 and idler 13
4 is rotatably attached. Gear 13 above
1 and the idler 132 are integrally fixed, and the pulley 133 and the idler 134 are integrally fixed. The gear 131 is meshed with the gear 127, and a rubber belt 135 is stretched between the pulley 128 and the pulley 133.

The idler 123 can be brought into contact with the middle diameter portion 137 of the flywheel 136 shown in FIG. 2 or 11, and the idler 132 can be brought into contact with the drum 17 of the reel shaft 4 as shown in FIG. can be done. The idler 134 can be brought into contact with the drum 18 of the reel shaft 5, as also shown in FIG.

The flywheel 136 is fixed to the capstan 60 and rotated by an appropriate motor (not shown) via a belt (not shown) in a well-known manner. This flywheel 136 is formed with the above-mentioned medium diameter portion 137 and small diameter portion 138.

A pin 139 is implanted in the arm 125, and a long hole 141 of the arm 140 is loosely fitted into the pin, so that the arms 125 and 140 are rotatably connected. This arm 140 is rotatably attached to the substrate 1 using a fulcrum 142, and a pin 143 implanted at the end is pressed against the edge of a notch 146 of a sliding plate 145 by a spring 144.

The sliding plate 145 is slidably attached to the base plate 1, and biased to the right in FIG. 4 by a spring 147. This sliding plate 145 has a vertical protrusion 1
48, rising part 149, U-shaped cutout part 150, 15
1, 152 and a protrusion 153 are formed, and the pin 1
54 have been planted. The spring 144 is wound around this pin 154, and the notches 150, 15
1,152 have separate pins 158, 159, implanted in arms 155, 156, 157, respectively.
160 is fitted. The arm 155 is 1
The pin 162 is rotatably attached to the substrate 1 using the fulcrum 61 as a fulcrum, and the pin 162 implanted at the end is fitted into the hole 163 of the sliding plate 30. The arm 156 is rotatably attached to the substrate 1 about a fulcrum 164, and the pin 51 is implanted at its end. The arm 157 is rotatably attached to the substrate 1 using a fulcrum 165, and a pin 166 implanted at the end thereof can be pressed by the edge of the sliding plate 29. Reference numeral 167 denotes an arm, which is rotatably attached to the substrate 1 with 168 as a fulcrum. A pin 169 is implanted in this arm 167 so that it can come into contact with the end of the projection 153 of the sliding plate 145, and the edge of the arm 167 can come into contact with the projection 170 of the sliding plate 28. There is. Projection 148 of the sliding plate 145
can press the pin 81, and the raised portion 149 can press the protrusion 172 of the movable plate 171. A pin 174 implanted in the substrate 1 is rotatably and slidably attached to the elongated hole 173 of the movable plate 171. Further, the movable plate 171 is biased by a traction spring 175 stretched between it and the board 1, and the movable plate 1
An idler 177 is rotatably attached to a shaft 176 implanted in the shaft 71. The movable plate 171
The pin 91 is implanted in the pin 91 . The idler 177 includes a large diameter part 178 and a small diameter part 179, the large diameter part 178 can be brought into contact with the small diameter part 138 of the flywheel 136, and the small diameter part 179 can be brought into contact with the drum 19. Further, the shaft 176 is fitted into a window 180 of the substrate 1.

In FIG. 2, reference numeral 181 is a sliding plate slidably attached to the substrate 1, and at both ends of the sliding plate 184, 185 of arms 182, 183 are connected to the arms 182, 183 and the sliding plate 181. They are each pressed by traction springs 186 and 187 stretched between them. These arms 182, 183
are rotatably attached to the substrate 1 about fulcrums 188 and 189, respectively, and pins 190 and 191 that can be pressed by the edges of the sliding plates 30 and 29 are implanted in the arms 182 and 183, respectively. The sliding plate 181 has a notch 192 cut out, and the shaft 32 is fitted into the notch.

In the above description, the braking mechanisms for the reel shafts 4 and 5 are omitted.

In a tape recorder configured as above,
By operating the keyboard 12, a playback state is entered. When the keyboard 12 is operated, the sliding plate 21 slides against the spring 27, and this sliding causes the head stand 36 to slide via the spring 47.
7 and 38 are well-known cassette tapes (not shown)
The pinch roller 56 is pressed against the capstan 60 via the tape, and the movement of the pin 91 is released due to the rotation of the arm 93 pressed by the rising portion 98, and the movable plate 171
The idler 177 is moved by the spring 175.
The large diameter portion 178 of the flywheel 136 is brought into contact with the small diameter portion 138 of the flywheel 136, and the small diameter portion 179 is brought into contact with the drum 19. By pressing the tape against the capstan 60, the tape is run at a constant speed, and the tape fed out by this running is wound up by the rotation of the reel shaft 5. Since the head 38 is in contact with the tape running at a constant speed in this manner, a reproduced signal from the tape can be obtained as is well known. By the sliding of the head stand 36 described above, the shaft 62 is opened by the hole 61.
The positions of the idlers 132 and 134 are regulated, and the idlers 132 and 134 are maintained apart from the drums 17 and 18.

In this reproduction state, when the keyboard 11 is operated, the keyboard 12 is unlocked at the operating position, and the keyboard 12 is returned to its pre-operation position by the spring 27, thereby also returning the sliding plate 21 and the head stand 36.

In the playback state, when the keyboard 14 is operated, the sliding plate 31 slides against the spring 35, and the arm 57 is pressed by the rising part 89, so the pinch roller 56 separates from the tape (capstan). Furthermore, the movement of the pin 91 is regulated by the edge of the hole 92, and the idler 177 is connected to the flywheel 136.
Then, the tape leaves the drum 19, and the running of the tape is temporarily stopped. The slidable sliding plate 31 is pin 87
is caught in the notch 88 and held in its sliding position, and the cam 71 is pressed via the pin 101 which is pressed by the beveled edge 102. By this pressing, the cam 71 is rotated against the spring 75 to a position where its notch 80 faces the raised end portion of the arm 77 .

This paused state is canceled by operating the keyboard 14 again, as the pin 87 comes off from the notch 88.

In the above-mentioned temporary stop state, when the electromagnetic plunger 66 is excited as described above by turning on the power, the sliding plate 63 slides against the spring 64, and the locking plate 82 is moved in the opening direction by the inclined portion 74 of the arm 69. Pivoted against the spring 84, the pin 86 is removed from the notch 88. As a result, the sliding plate 31 is returned by the spring 35, and the tape runs at a constant speed. This allows you to play while you are away.

When recording on a tape, keys 9 and 12 are pressed simultaneously. By operating the keyboard 12, the tape is run at a constant speed as described above, and by operating the keyboard 9, the sliding plate 28 is slid against the spring 32, and a well-known recording/playback switch (not shown) is operated. As is well known, the tape is erased by the head 37 and recorded onto the tape by the head 38.

In the recording state, the keyboard 14 is operated to enter a temporary stop state, and by supplying power supply current in this state, the plunger 66 is energized and recording while absent is possible.

When the keyboard 10 is pressed, the sliding plate 29
is slid against the spring 33, the pin 166 is pressed by the edge of the sliding plate 29, the arm 157 is rotated by this pressing, and the sliding plate 145 is moved against the spring 14.
7. This sliding causes the spring 14
Arm 14 with pin 143 pressed to 4
0, and an arm 156 having a pin 159 fitted in the notch 151 is rotated. arm 156
When the head stand 36 is in the regenerating state, the head stand 36 is pressed against the spring 47 by the pin 51, and the head stand 36 is slid by this pressure, and the heads 37, 38 and the pinch roller 56 are rotated.
is away from the tape. Due to the rotation of the arm 140, the arm 125 is rotated and the idler 123 is rotated.
is brought into contact with the middle diameter portion 137 of the flywheel 136. Further, the pin 191 is pressed by the sliding movement of the sliding plate 29 against the spring 33, and the arm 183 is rotated, so that the sliding plate 181 via the spring 187 is slid to the right in FIG. . Due to this sliding movement, the idler 132 rotatably attached to the shaft 62 fitted in the notch 192 is pressed against the drum 17.

In this state, the idler 123, friction member 130, gears 127, 13 are connected to the flywheel 136.
Since the idler 132 is rotated via the roller 1, the drum 17 is rotated, the reel shaft 4 is rotated, and the tape is rewound.

When the keyboard 13 is pressed, the sliding plate 30 slides against the spring 34, and as a result of this sliding, the hole 16
Arm 155 with pin 162 fitted to 3
The pin 15 is rotated and fitted into the notch 150.
8, the sliding plate 145 is slid against the spring 147. Due to this sliding, the idler 123 is moved to the middle diameter portion 13 of the flywheel 136 as described above.
7. Furthermore, the sliding of the sliding plate 30 presses the pin 190 and rotates the arm 182. This rotation causes the sliding plate 181 to slide to the left in FIG. Ru.

In this state, from the fly hole 136, the idler 123, pulley 128, belt 135, pulley 1
The drum 18 is rotated via the drum 33 and the idler 134, and this rotation causes the reel shaft 5 to rotate and the tape to be fast-forwarded.

In the playback (or recording) state, when the end of the tape is detected and the electromagnetic plunger 66 is excited, the sliding plate 63 slides against the spring 64 and the pressing edge of the cam 71 Arm 77 is pressed by portion 78 . The arm 77 is rotated by this pressure, and the protrusion 193 is pressed by this rotation, and the lock plate 103 is rotated against the spring 113.
8) The keyboard 12 was held in the operating position by
(or 12 and 9) return to their pre-operation positions, and the tape recorder comes to a halt.

In the above rewinding (or fast forwarding) state, the spring 14
Due to the sliding of the sliding plate 145 against 7, the protrusion 14
8 presses the pin 81, and the cam 71 is rotated against the spring 75 to the position shown in FIG. In this state, when the plunger 66 is excited by detecting the end of the tape, the sliding plate 63 slides against the spring 64, and this sliding causes the pressing edge of the cam 71 to Arm 77 is pressed by 79, and protrusion 109 (or 110)
The keyboard 11 (or 13), which had been held at the operating position by the keys, returns to the position before the operation.

When the sliding plate 145 is slid against the spring 147, the arm 69 is rotated by the pin 81 against the spring 72 as shown in FIG. Since it is removed from the position, even in a temporarily stopped state where the temporary pin 87 is caught in the notch 88, the temporary stopped state is not canceled by the excitation of the electromagnetic plunger 66.

If you operate the above keyboards 10 and 12 at the same time,
The ends of the keyboards 10, 12 rest on the upper ends of the protrusions 109, 112 and are held in the operating position, and as the arm 116 is rotated by the keyboard 10 against the spring 122, the lock plate 103 becomes a sub-lock plate. 107 can be rotated independently.
Further, by operating the keyboard 10, the tape is rewound as described above. Furthermore, when the keyboard 12 is operated, the head stand 36 is slid against the spring 27.
Since this sliding movement is regulated by the pin 51 as described above, the heads 37, 38 and the pinch roller 56 do not touch the tape.

In this state, when the end of the tape is detected, the electromagnetic plunger 66 is excited, the sliding plate 63 slides against the spring 64, and as a result of this sliding, the pressing edge 79 of the cam 71 pushes the arm 77 is pressed and the lock plate 103 is rotated against the spring 113, so that the keyboard 10 is unlocked. However, since the sub-lock plate 107 is not rotated,
The keyboard 12 remains unlocked and enters the playback state.

Further, when the electromagnetic plunger 66 is excited by the end of the tape or the like while the keyboards 10 and 12 are operated simultaneously and the keyboard 14 is operated, the cam 7
The arm 77 is pressed by the pressing edge 79 of 1,
The lock plate 103 is rotated against the spring 113 and the keyboard 10 is unlocked, but since the arm 69 is rotated against the spring 75, the inclined portion 74 is not equal to the lock plate 82. From then on, the keyboard 14 is kept in an operating state and enters a playback standby (pause) state.

This playback standby state can also be obtained when the keyboards 12 and 13 are operated simultaneously and the plunger 66 is excited while the keyboard 14 is operated.

When the keyboard 10 (or 13) is operated, the sliding plate 145 slides against the spring 147 as described above, so the protrusion 153 comes into contact with the pin 169, and in this state, the keyboard When an attempt is made to press the key 9, the rotation of the arm 167 pushed by the protrusion 170 of the sliding plate 28 is restricted, so the keyboard 9 is pressed.
The pressing operation will no longer be possible.

As mentioned above, in the present invention, two driven idlers 132 and 13 are connected to a driving rotating body such as the driving idler 123.
4 in opposite directions to each other, one idler 132 of these idlers 132, 134 is pressed against the reel stand (drum 17) on the supply side to rewind the tape, and the other idler 134 is rotated on the take-up side. A drive device in a tape recorder that fast-forwards the tape by pressing against a reel stand (drum 18), which includes a first gear 127 and a first pulley 128 rotated by the drive rotary body, and the driven idler 132. , 134, a second gear 131 that rotates together with one of the idlers;
A second pulley 13 rotating with the other idler
3, the first gear 127 and the second gear 131 mesh with each other, and a belt 135 is placed between the first pulley 128 and the second pulley 133 so that the driven idler is connected to the drive rotating body. 132,134
By transmitting the rotation to , the desired purpose can be achieved.

[Brief explanation of the drawing]

The figure shows one embodiment of the present invention.
The figure is a front view, Figure 2 is a rear view, Figure 3 is a longitudinal side view of the main parts, Figure 4 is a rear view with some parts removed, and Figure 5 is a rear view with some parts removed. Fig. 6 is a front view showing the operating state of the main parts, Fig. 7 is a front view of the state.
The figure is a front view of one part, Figure 8 is a side view of Figure 7,
Figure 9 is a vertical side view of Figure 7, Figure 10 is a side view of the main part, Figure 11 is a plan view of Figure 10, and Figure 12 is a side view of Figure 7.
13 is a plan view of FIG. 10 with some parts removed. FIG. 14 is a side view showing another operating state of FIG. 8, and FIG. 15 is a configuration diagram showing a conventional example. 17, 18: drum, 123: drive idler,
127: Gear, 128: Pulley, 131: Gear,
132, 134: Idler, 133: Pulley, 1
35: Belt.

Claims (1)

[Scope of utility model registration request] The two driven idlers are rotated in opposite directions from the driving rotor, one of these idlers is pressed against the reel stand on the supply side to rewind the tape, and the other idler is pressed against the reel stand on the supply side. In a drive device for a tape recorder that fast-forwards a tape by pressing against a reel stand, the first gear and the first pulley rotated by the drive rotary body, together with one of the idlers of the driven idler. a second gear that rotates; a second pulley that rotates together with the other idler; the first gear and the second gear mesh with each other;
A drive device for a tape recorder, wherein a belt is hung between the pulley and the second pulley to transmit rotation from the drive rotary body to the driven idler.