JPH0740387B2 - Dual tape recorder mode switching mechanism - Google Patents

Description

The present invention relates to a mode switching mechanism of a multiple tape recorder that mounts a plurality of cassette tapes in a single tape storage section.

(B) Conventional technology A conventional double-sided tape recorder is, for example, as described in Japanese Utility Model Laid-Open No. 57-67.
As can be seen in Japanese Patent No. 267, a plurality of cassette tapes are stored in one tape storage portion, but when the edit mode is selected, each cassette tape is not in a recording state by operating only the play lever, A mode switching mechanism has been proposed in which the second cassette tape is in a recording state by operating both recording levers.

(C) Problems to be Solved by the Invention However, in the conventional mode switching mechanism of the dual tape recorder, both the first and third cassette tapes proceed at a constant speed when the edit mode is selected and only the play lever is operated. In spite of this, the recording state does not occur, and the operation of both the play lever and the recording lever brings the second cassette tape into the recording state, so that there is a disadvantage that mode switching becomes complicated.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mode switching mechanism for a multiple tape recorder capable of easily performing mode switching.

(D) Means for Solving the Problems The present invention has been made to solve the above problems, and the first and second cassette tapes are stacked and housed in one tape housing unit, and at the same time, these tapes are stored. One capstan shaft is made to correspond to the cassette tape, and the first and second pinch rollers corresponding to the first and second cassette tapes are brought into contact with the capstan shaft, respectively.
In a double tape recorder in which a second cassette tape is run at a constant speed, a play in which a sub-chassis is advanced and a first and a second pinch roller are brought into contact with the capstan shaft when being moved from a non-operating position to an operating position. In the mode in which the lever means and the second cassette tape can operate,
The forward lever is operated together with the sub-chassis by the operation of the play lever means to allow the contact between the second pinch roller and the capstan shaft, and the forward movement is prevented in a mode in which the second cassette tape cannot operate. And a pinch roller blocking lever means for blocking contact between the second pinch roller and the capstan shaft, and a blocking lever for blocking the pinch roller blocking lever means in a mode in which the second cassette tape cannot operate. Means, a recording lever means for putting the circuit into a recording state when the circuit is moved from the non-operating position to the operating position, and a forward movement to the operation of the recording lever means to cause the blocking lever means to block the pinch roller blocking lever means. Of the freezing lever means that is brought into a non-operating state, the first or second tape mode, and the edit mode that simultaneously drives the first and second tapes. Mode select lever means for allowing each position to be selectively taken, and the mode select lever means cooperates with the play lever means to select the first pinch roller according to each of these modes. To engage the first pinch roller to positively abut the capstan shaft.
When the edit mode is taken by the mode select lever means and the play lever means is operated to the operation position, the contact prevention means is provided for preventing the contact between the pinch roller and the capstan shaft. By disengaging the means and the first pinch roller, the first pinch roller is brought into contact with the capstan shaft, and the pinch roller blocking lever means is blocked by the blocking lever means so that the second pinch roller becomes The contact with the capstan shaft is blocked, and the first tape operation state in which only the first cassette tape runs at a constant speed is set, and the edit mode is set by the mode select lever means.
When the play lever means and the recording lever means are operated to the operating position, the abutment preventing means and the first pinch roller are not engaged by the operation of the play lever means, and are connected by the operation of the recording lever means. The first and second lever means move forward and press the blocking lever means to a position allowing the forward movement of the pinch roller blocking lever means.
Pinch roller contacts the capstan shaft to run both the first and second cassette tapes at a constant speed, so that the first cassette tape is played back and the second cassette tape is recorded at the same time. The present invention provides a mode switching mechanism for a characteristic double tape recorder.

(E) Operation According to the present invention, when only the play lever means is operated after the edit mode is selected by the mode select lever means, the first tape operation state in which only the first cassette tape runs at a constant speed is set, and the play lever is operated. When both the recording means and the recording lever means are moved to the operating position, the first and second cassette tapes both run at a constant speed, and the first cassette tape is reproduced and the second cassette tape is recorded at the same time, that is, the so-called editing state. Become.

Further, according to this mode switching mechanism, the first tape mode position selected by the mode select lever means can be eliminated, and the mode switching can be performed more easily than before.

(F) Embodiments The present invention will be described in detail based on the embodiments shown in the drawings. The present invention is not limited to this.

FIG. 1 shows the arrangement when the cassette tape is mounted in this embodiment. F, a plurality of cassette tapes 1, 2 for example
Capstan 3 for OR and Capstan for REV
4, and a reel stand (not shown) are arranged so as to be coaxial with each other, and the magnetic head 5 and the pinch roller 6 are provided at a position facing the magnetic tape surface of the cassette tape 1, and the magnetic force of the cassette tape 2 is increased. The magnetic head 7 and the two pinch rollers 8 and 9 are arranged at positions facing the tape surface. Two
The two magnetic heads 5 and 7 are mounted on the same reference stand 10,
Further, each of the pinch rollers 6, 8 and 9 has a structure capable of operating independently.

FIG. 2 shows an example of operation button arrangement. In this embodiment, for two cassette tapes, one is FO
Play only R (PLAY), fast forward (FF), rewind (REW),
It has each function of stop / eject (STOP / EJECT), and the other has FOR and FEV bidirectional playback (PLAY) and recording (REC), fast forward (FF), rewind (REW), stop / read (STOP). / EJEC
T) and pause (PAUSE) functions. In the following description, it is located above the two cassette tapes.
The player with only FOR is abbreviated as T _1, and the FOR and RE located below
A recording / playback device in both V directions is abbreviated as T ₂ .

The tape recorder according to the present embodiment has a continuous reproduction mode in which the reproduction of FOR and REV of T ₂ is continuously performed after the end of reproduction of T ₁ , T ₂
It is possible to select four modes: a 1-cycle mode and a continuous mode in, and an edit mode in which playback is performed at T ₁ and recording is performed at T ₂ at the same time. In edit mode,
T ₁ and T ₂ operate by operating both the PLAY and REC buttons, and only T ₁ can be played back by operating only the PLAY button.

FIGS. 3 (a) and 3 (b) show the end detection sensor portion of the cassette tape. The shaft 12 fixed to the take-up reel cap 1 for mounting the cassette tape ₁ on the T ₁ side is rotatably inserted into the hollow shaft 13a formed in the main chassis 13 and protrudes to the back side of the main chassis 13. The receiving plate 14 is fixed to the portion. Also, the backing plate 14
An end detection sensor 15 having a pushing protrusion 15a is attached to the lower shaft 12. This end detection sensor 15 has a spring 16 mounted between it and the receiving plate 14.
The urging force is applied to the stopper plate 17 attached to the shaft 12, and the rotation of the take-up reel cap 11 is transmitted to the end detection sensor 15. When the take-up reel cap 11 rotates, that is, when T ₁ operates, the pushing protrusion 15a of the end detection sensor 15 has a contact surface of a sensor lever 19 rotatably attached to a shaft 18a fixed to the back chassis 18. 19a is pressed and slides toward the back chassis 18 that protrudes from the sensor lever 19
The b is slid on the peripheral surface of an eccentric sliding cam 20a formed coaxially with the end cam 20 rotatably held by the back chassis 18. The end cam 20 rotates in the direction indicated by the arrow F, but in addition to the sliding cam 20a, the end cam 20 slides on the outer surface 20b when the sensor lever 19 is rotated in the direction of the arrow E and located outside thereof. An arc-shaped cam 20c capable of sliding contact with the protrusion 19b is formed.

When the rotation of the take-up reel cap 11 is stopped at the end of the cassette tape during the operation of T ₁ , the rotation of the end detection sensor 15 is also stopped accordingly, and the pushing protrusion 15a of the end detection sensor 15 causes the sensor lever 19 to move. Stop pressing. The sliding projection 19b of the sensor lever 19 slides on the outer surface 20b of the rear cam 20c, which is pressed to the maximum diameter portion of the sliding cam 20a by the end cam 20 which rotates in the direction of arrow F, and slides the sensor lever 19 on the shaft 18a. Rotate in the direction of arrow E using the fulcrum. The sensor lever 19 presses a pin of an end select lever (not shown) that abuts on the arm portion 19c, as described later.
Stop the operating state of T ₁ .

On the other hand, on the outer circumference of the hollow shaft 13a formed on the main chassis 13, a take-up reel stand on which the T ₂ side cassette tape 2 is mounted
21 is inserted. The take-up reel stand 21 is provided with a gear 22 held by the main chassis 13 at a position where it meshes with a gear 21a provided on the lower end surface thereof. A gear protruding from the gear 22 to the back side of the main chassis 13.
As with the shaft 12 fixed to the take-up reel cap 11, the support shaft 23 of 22 has a receiving plate 24 and a pushing protrusion 25.
An auto stop sensor 25 having a is attached. The auto stop sensor 25 is pressed against the stop plate 27 attached to the support shaft 23 by the urging force of the spring 26 mounted between the auto stop sensor 25 and the receiving plate 24 so that the rotation of the take-up reel stand 21 is transmitted to the auto stop sensor 25. It has become. When the take-up reel base 21 rotates, that is, when T ₂ operates, the pushing protrusion 25a of the auto stop sensor 25 has a contact surface 28a of a sensor lever 28b rotatably attached to a shaft 18b fixed to the back chassis 18. The sliding protrusion 28b, which is pressed against and extends toward the back chassis 18 in a shape projecting from the sensor lever 28, slides on the peripheral surface of the swing cam 20a integral with the end cam 20.

When the rotation of the take-up reel base 21 is stopped at the end of the cassette tape during the operation of T ₂ , the rotation of the gear 22 is also stopped accordingly, and the pushing protrusion 25a of the auto stop sensor 25 is stopped.
Does not press the sensor lever 28. Sensor lever
Similarly to the case of the T ₁ side, the 28 rotates in the direction of the arrow E about the shaft 18b as a fulcrum and presses the pin of the end select lever (not shown) which is in contact with the arm 28c to stop the operating state of T ₂ .

As described above, in the tape recorder of this embodiment, the two sensor levers 19 and 28 that operate by transmitting the rotations of the reel cap 11 on the T ₁ side and the reel base 21 on the T ₂ side are
Sliding on the swinging cam 20a of the same end cam 20, the sensor levers 19 and 28 are rotated at the end of the cassette tape to press the end select lever to stop or switch the operation of T ₁ and T _2. Has become. In the tape recorder of this embodiment, the take-up reel cap 11
When the rotation of the take-up reel base 21 stops and the operation of the end detection mechanism starts, the end detection operation becomes a malfunction when stopped, during PAUSE, when operating only on the T ₁ side, and when operating only on the T ₂ side. To prevent this, a blocking mechanism that operates according to each mode is provided. This blocking mechanism will be described later.

FIG. 4 to FIG. 9 show the mechanical structure of the tape recorder in this embodiment. In FIG. 4 showing the state in the edit mode, the mode select lever 30 arranged on the side of the sensor lever 28 has a continuous U-shaped shape, and the length provided on the U-shaped portion. A pin 30b engaged with the hole 30a is slidable in the directions of arrows C and D in the figure. In the U-shaped part of the mode select lever 30,
Positioning pins 30c projecting toward the mode setting plate 31 having a plurality of V-shaped recesses are formed. Locating pin 3
In edit mode when 0c is engaged with the recess 31a of the mode setting plate 31, the continuous mode of T ₂ when engaged in the recess 31b, the 1-cycle mode in the T ₂ when engaged in the recess 31c, and recess 31d When engaged with, the mode becomes continuous.

Further, the mode select lever 30 has a pin 30d protruding downward from the upper end of the U-shaped portion. This pin 30d is
When the positioning pin 30c selects the edit mode, the convex portion 32b that presses the inclined surface 32a formed on one side surface of the end select lever 32 and rotates the end select lever 32 in the E direction around the shaft 32f is the lock plate. The release lever 33 is moved to a position where the pin 33a formed on the release lever 33 is engaged. The pin formed on the end select lever 32 as the sensor levers 19 and 28 on the T ₁ side or the T ₂ side rotate in the E direction about the shaft 18a or the shaft 18b as the fulcrum by the end cam 20 at the end time of the tape winding. Press 32c or pin 32d to slide the end select lever 32 in the D direction. End select lever
The convex portion 32b of 32 slides the lock plate release lever 33 in the D direction to release the lock plate 59 and bring it into a stopped state as described later.

On the other hand, as shown in FIG. 5, when the continuous mode is selected at T ₂ in which the positioning pin 30c engages with the recess 31b of the mode setting plate 31, the pin 30d of the mode select lever 30 has the inclined surface 32a of the end select lever 32. Do not press. When the end select lever 32 is slid in the D direction at the end of the tape winding, the protrusion 32b does not slide the lock plate release lever 33, and the pin formed on the end select lever 32
32e presses the arm portion 34a of the trigger lever 34. Due to this pressing, the trigger lever 34 is rotated in the E direction with the shaft 34b as a fulcrum, and the protrusion formed on the logic cam gear 35.
Since the engagement with 35a is released, the logic cam gear 35 having the toothless portion 35b is rotated in the E direction. In the logic cam gear 35, two cams 36 and 37 are integrally formed on one side surface, and rotational force in the direction E in the figure is given by a starting spring (not shown), but normally the toothless portion 35b rotates. It is locked so as to come to a position corresponding to the gear 38 rotated by the drive source.

In the mode select lever 30, the built-up portion 39e formed in the shaded area in the figure contacts the cam 37 integrated with the logic cam gear 35 when the continuous mode is selected, and the logic cam gear 35 rotates at the tape winding end time. Along with this, the cam 37 is pressed. Then, the positioning pin 30 of the mode select lever 30
c slides to 31c from the recess 31d of the mode setting plate 31, T ₂
It switches to the 1-cycle mode in. The trapezoidal projection 30f formed on the side wall of the mode select lever 30 has a pin 39a formed on the program interlocking lever 39 configured to be slidable in the directions of arrows A and B contacted by the biasing force of the spring 40. It is touched. The program interlocking lever 39 is an arm that extends toward the logic cam gear 35.
39b, and a pin 39c protruding toward the logic cam gear 35 is formed at the tip portion thereof.

Logic cam gear at the end of tape winding in T ₂ mode
When 35 rotates, pin 39c of program interlocking lever 39
Is the inner surface 36a of the cam 36 integrated with the logic cam gear 35.
Then, the program interlocking lever 39 is slid in the B direction. On the other hand, at the end of the tape winding in the continuous mode, the pin 39a of the program interlocking lever 39 contacts the inclined surface 30g of the mode select lever 30, and the pin 39c of the program interlocking lever 39 slides in the A direction from that in the T ₂ mode. Therefore, when the logic cam gear 35 rotates, the pin 39c
Passes through the outside of the cam 36, and the program interlocking lever 39 does not slide. At the end of the tape winding in the T ₂ mode, the pin 39d formed at the left end of the program interlocking lever 39 which is slid in the B direction is the arm portion 4 of the inverted L-shaped cam lock lever 41.
Since 1a is pressed, the cam lock lever 41 is rotated in the F direction with the shaft 41b as the fulcrum, and the program switching cam gear
The engagement with the protruding portion 42a formed on 42 is released.

The program switching cam gear 42 is given a rotational force in the F direction by a starting spring (not shown), and meshes with a gear 43 rotated by a rotary drive source to rotate in the F direction. Therefore, the cam lock lever 41 engages with the protrusion 42b of the program switching cam gear 42, and the program switching gear 4
Since the second toothless portion 42c moves to a position corresponding to the gear 43, the program switching gear 42 is stopped from rotating. The pin 41c of the cam lock lever 41 is engaged in the long hole 44 formed in the program lever 44, and by pressing the program lever 44 in the D direction, the program switching cam gear 42 can be rotated. 45 is a program switching cam formed integrally with the program switching cam gear 42,
An arm portion 46a of a program switching lever 46, which is restricted in its movement by a long hole 46b and a pin 46c engaged with the long hole 46b and is movable in the A and B directions by a spring 47, is in contact with the switching cam 45.

An RVS lever 48 is rotatably attached to a shaft 46d formed on the program switching lever 46. The movement of the RVS lever 48 is restricted by a pin 30h formed on the mode select lever 30 that engages with a long hole 48a provided therein. A program interlocking lever 49 slidable in the A and B directions is attached to a pin 46e formed on the arm portion 46h of the program switching lever 46, and is biased in the A direction by a spring 50. Further, the switching levers 51, 42 are rotatably attached to the shafts 46f, 45g formed in the program switching lever 46, and the long holes (not shown) provided in the arm portions 51a, 52a are The switching levers 51, 52 are restricted in their movements by being engaged with the engagement pin 49a formed on the program interlocking lever 49.

When the positioning pin 30c of the mode select lever 30 is slid from the T ₂ mode to the continuous mode, the pin 30i formed on the mode select lever 30 causes the arm 52b of the switching lever 52 to move.
Is pressed and the positioning pin 30c is slid from the T ₂ mode to the edit mode, the mode select lever 30
By pressing the arm portion 51b of the switching lever 51 by the pin 30j formed on the switching lever 51, the switching levers 51 and 52 are rotated about the shafts 45f and 46q, respectively, and the program interlocking lever 49 is slid in the B direction.

FIG. 10 to FIG. 16 show the switching mechanism of the sensor killer and the pinch roller of the tape recorder in this embodiment.

FIG. 10 shows the stopped state in the edit mode. Program lever 44, REC lever 53 having pin 53a, PLAY lever 54 having pin 54a, REW lever 55 having pin 55a, FF lever 56 having 56a, STOP lever 57 having pin 57a, and PAUSE lever 58 are respectively In the figure, they are attached so as to be slidable in the C and D directions, and are biased in the C direction by springs (not shown). 59 is a lock plate slidably mounted in the A and B directions.
59 is biased in the B direction by a spring (not shown), and convex portions 59a to 59d are formed at respective positions of the lock plate 59 corresponding to the pins 53a to 56a, and the levers 53 to 56 are formed.
Lock.

Further, a pin 57a formed on the STOP lever 57 is projected at a position corresponding to the inclined surface 59e formed on the lock plate 59, and when the STOP lever 57 is pressed in the D direction, the levers 53- 56 is disengaged. Further, at the position corresponding to the inclined surface 59f of the lock plate 59, the lock plate release lever 33
When the lock plate release lever 33 slides in the D direction at the end of the tape winding, the pin 33c presses the inclined surface 59f, and the lock plate 59 causes each of the levers 53 to 56 to protrude. Is canceled. At the tip of the PAUSE lever 58, there is a PAUSE movement lever 75 that rotates around the shaft 74a as a spindle.
Are abutted.

T ₁ axis pinch roller lever 60, T ₂ side FOR pinch roller lever 61, T ₂ side REV pinch roller lever 62
It is rotatably attached to 63 to 65 and positioned by springs 66 to 68 and pins (not shown). In addition, each pinch roller lever 60-62 has a capstan 69-
Springs 72 to 74 for being crimped to 71 are attached. The T ₂ side pinch roller levers 61, 62 are provided with respective arm portions 61b, 62b for blocking or PAUSE in the T ₁ mode.

The pinch roller levers 60 and 61 and the capstan 69,
In the description of this embodiment, the numeral 70 is indicated by a different numeral for convenience, but it is actually coaxial.

The sub-chassis 76 is configured to be slidable in the C and D directions by a long hole 76b provided therein and a pin 76a engaging with it, and is urged in the C direction by a spring 77. The sub-chassis 76 has a pinch operation lever 78 on the shaft 76c.
Further, another pinch operation lever 79 is rotatably attached to another shaft 76d. Pinch lever 78,79
The contact pins 78a and 79a are formed on the pin, and are constantly urged by the springs 80 and 81 to the end faces 46h and 46i of the program switching lever 46. The pause back lever 82 configured to be slidable in the C and D directions is biased in the D direction by the spring 83, and is prevented from moving in the D direction by the pin 76e of the sub chassis 76. The pause back lever 82 includes arms 82a and 82b for unlocking the sensor killer 84 and 85, arms 82c and 82d for pushing down the pinch roller levers 61 and 62 at the time of the pause, and D direction. And a convex portion 92f when it is prevented from sliding. Sensor killer 84 and 85, respectively shaft 84a, with rotatably mounted to the fulcrum 85a, the rotational force of the E direction by pulling 86 and 87 are energized, each T ₂ side sensor lever
The arm portions 28c and 28d at both ends of 28 are pressed.

The mode select lever 30 has a trapezoidal convex portion 30k formed at a position facing the arm portion 60b of the T ₁ side pinch roller lever 60, and regulates the operation of the pinch roller lever 60 according to each mode. Further, the arm portions 30l, 30m, 30n formed on the mode select lever 30 release the engagement of the sensor killer 84, 85. Another sensor killer 88, rotatably mounted by a shaft 88a as a fulcrum, the rotation force of the E direction is in contact with the arm portion 30m of the mode selector lever 30 provided by the spring 89, T ₁ side The arm portion 19c of the sensor lever 19 is not pressed. On the other hand, the arm portion 19d of the sensor lever 19
A sensor killer 90, which is rotatably mounted on a shaft 90a as a fulcrum and is given a rotational force in the E direction by a spring 91, is pressed against the shaft.

In addition, on one side surface 30o of the mode select lever 30,
A slide lever 92, which is slidable in the A and B directions, is abutted by a spring (not shown). Slide lever
A blocking lever 93 is rotatably attached to a shaft 92a formed on 92. The blocking lever 93 is given a rotational force in the F direction by a spring (not shown), but is locked by the contact pin 92b of the slide lever 92 to block the rotation in the F direction. A coupling lever 94 that is slidable in the A and B directions is attached to a position facing the arm portion 93a of the blocking lever 93, and a pin 94a formed on the coupling lever 94 is an inclination formed on the REC lever 53. It is in contact with the surface 53b. At the tip of the FF lever 56 of the REW lever 55, an F / R interlocking lever 95 that can slide in the C and D directions is urged in the C direction by a spring 96. At the time of FF or REW, the pins 95a and 95b formed on the F / R interlocking lever 95 are slid in the D direction and press the sensor killers 90 and 85, respectively.

Next, the operating state of this embodiment will be described for each mode with reference to the drawings.

(1) Edit mode time In the tape recorder according to the embodiment of the present invention, two operation states can be selected after the edit mode is selected. That the reproduction state of the T ₁ side only, are two of the so-called dubbing state recorded in and reproduced by T ₁ side T ₂ side. First, the case of selecting the reproduction state only on the T ₁ side will be described.

1-1) FIG. 11 shows the T ₁ reproduction state in the edit mode. PLAY lever 54 from the stopped state (Fig. 10)
When only one is pressed in the D direction, the sub chassis 76 is pressed in the same direction. At this time, the pin formed on the PLAY lever 54
54a is locked to the convex portion 59b of the lock plate 59, and the operating state is maintained. At the same time, the pinch operation levers 78 and 79 attached to the sub chassis 76 are also slid in the D direction. The pinch operation lever 78 abuts against and presses the spring 72 attached to the T ₁ side pinch roller lever 60, whereby the pinch roller lever 60 is rotated in the F direction with the shaft 63 as a fulcrum. The arm portion 60b of the pinch roller lever 60 rotates without being restricted by the convex portion 30k of the mode select lever 30, and the roller portion 60a is pressed against the capstan 69. On the other hand, in the pause back lever 82 that is slid in the D direction by the spring 83 as the sub chassis 76 slides in the D direction, the convex portion 82f abuts the blocking lever 93 and the sliding is stopped. Therefore, in the T ₂ side pinch roller lever 61 rotated in the F direction with the spring 73 being pressed by the pinch operation lever 78 and using the shaft 64 as a fulcrum, the arm portion 61b contacts the arm portion 82c of the pause back lever 82. Rotation is restricted by the contact, and the roller portion 61a is not pressure-bonded to the capstan 70. In the REV side pinch roller lever 62, the pinch operation lever 79 comes into contact with the spring 74 but does not press the spring 74, so that the roller portion 62a is not pressed against the capstan 71.
Similarly, a play idler, a circuit, or the like (not shown) operates, and only the T ₁ side is in the reproduction state.

Next, the auto stop sensor in this state will be described.

The killer of the end detection sensor of the tape recorder is two sensor killer 88 and 90 on the sensor lever 19 on the T ₁ side.
Further, _two sensor killers 84 and 85 act on the T ₂ side sensor lever 28, respectively.

First, the sensor killer 88 is the arm of the mode select lever 30.
It is pressed to 30 m, and the arm 19c of the T ₁ side sensor lever 19
The pressure on is released. The sensor killer 90 is also pressed by the tip portion 76g of the sub chassis 76 during operation, and the pressing of the sensor lever 19 by the arm portion 19c is released.
In addition, the sensor killer 90 also operates the tip of the subchassis 76.
The sensor lever 19 is being pressed by 76g, and the pressing of the sensor lever 19 on the arm portion 19d is released. Therefore, at the end of the tape winding,
As the take-up reel cap and reel base stop rotating,
The sliding protrusion 19b of the sensor lever 19 is pressed to the maximum diameter portion of the swing cam 20a and then stops, and then slides on the outer surface 20b of the cam 20c to start the end detection operation. On the other hand, the sensor killer 84 is pressed against the arm portion 28c of the T ₂ side sensor lever 28 and the sensor killer 85 is pressed against the arm portion 28d, and the sliding protrusion 28b of the sensor lever 28 is constantly provided around the swing cam 20a. It's gone. Therefore, even when the take-up reel stand is stopped rotating, the same sliding as that during the operation is performed, so that the end detection operation is not performed.

Next, the selection of the dubbing state will be described.

1-2) FIG. 12 shows a dubbing state in the edit mode. PLAY lever 54 from the stopped state (Fig. 10)
And REC lever 53 in the D direction. Sub chassis 76
Is slid in the D direction as described above, and the roller portion 60a of the T ₁ side pinch roller lever 60 is pressed against the capster 69.
On the other hand, as the REC lever 53 is pressed, the pin 94a of the connecting lever 94 that was in contact with the inclined surface 53b is pressed, and the connecting lever 9 is pressed.
4 is slid in the B direction to press the arm portion 93a of the blocking lever 93. The blocking lever 93 is rotated in the E direction with the shaft 92b as a fulcrum. As the sub chassis 76 slides in the D direction,
The pause back lever 82, which is slid in the D direction by the spring 83, slides without the convex portion 82f being engaged with the blocking lever 93, and is locked to the pin 76e of the sub chassis 76. The T ₂ side pinch roller lever 61 is rotated in the F direction without the arm portion 61b contacting the arm portion 82c of the pause back lever 82, and the roller portion 61a is pressure-bonded to the capstan 70. However, the pinch roller lever 62 is
Although 79 abuts on the spring 74 but does not press it, the roller portion 62a is not pressed against the capstan 71. Similarly, play idlers, circuits, etc. not shown operate,
Play at T ₁ and simultaneously record at T ₂ in dubbing mode.

Next, the killer of the end detection sensor in this state will be described.

The sensor killer 90 is pressed by the tip portion 76g when the sub chassis 76 slides, and the pressing of the sensor lever 19 on the arm portion 19d is released. Further, as the pause back lever 82 slides in the D direction, the sensor killer 84 is pressed by the arm portion 82a of the pause back lever 82 and the sensor killer 85 is pressed by the arm portion 82b, respectively, to the arm portions 28c, 28d of the sensor lever 28. Is released. Also, the sensor killer 88 has four sensor killer 84, 85, 88, 9 since the pressing of the sensor lever 29 to the arm portion 19c is released when the edit mode is selected.
In 0, the pressing on the sensor levers 19 and 28 is released. Therefore, the tape winding ends _first on the T ₁ side or the T ₂ side, and the end detection operation is started when the rotation of the take-up reel cap or the reel base is stopped.

FIG. 4 shows the mechanical structure in the edit mode. As described above, the end of the tape is wound, and the sensor lever 19 or the sensor lever 28 is set on the shafts 18a and 18b as fulcrums, respectively.
As it rotates in the direction, the pin 32c or 32d formed on the end select lever 32 is pressed to slide the end select lever 32 in the D direction. Therefore, the convex portion 32b of the end select lever 32 slides the lock plate release lever 33 in the D direction. Along with this, the lock plate release lever
The pin 33c of 33 pushes the inclined surface 59f of the lock plate 59 and slides the lock plate 59 in the direction A. Therefore, the pin 54a of the PLAY lever 54 and the pin 53a of the REC lever 53 engage with the lock plate 59. Is released and the robot is stopped (see Fig. 12).

Next, the killer of the sensor in the paused state will be described. The pause in the tape recorder according to the embodiment of the present invention works only on the T ₂ side. First, in the pause operation, in the operation state shown in FIG. 12, the PAUSE lever 5
Press 8 in the D direction. Since the PAUSE lever 58 pushes the arm portion 75b of the PAUSE operation lever 75, the PAUSE operation lever is the shaft 75.
The pause back lever 82 is rotated in the E direction with a as a fulcrum, presses the end surface 82e of the pose back lever 82 that is in contact with the arm 75c, and slides the pose back lever 82 in the C direction. The arm portion 82c of the pause back lever 82 presses the arm portion 61b of the T ₂ side pinch roller lever 61 to release the pressure contact between the roller portion 61 and the capstan 70. Also, since the play idler (not shown) is also released from the pressure contact, only the operation of T ₁ is performed. Furthermore, since the arms 82a and 82b of the pose back lever 82 are released from the pressing of the sensor killers 84 and 85, the respective sensor killers 84 and 85 are rotated by the springs 86 and 87, and the arm portions of the T ₂ side sensor lever 28. It is pressed by 28c and 28d. Therefore, the state becomes the same as in the T ₁ playback state, and the T ₂ side sensor lever 28 is killed.

Next, the killer of the sensor during FF or REW will be described. In the tape recorder according to the embodiment of the present invention, FF or REW operates on the T ₁ side when the edit mode is selected. FF lever from the stopped state shown in Fig. 10
When the 56 or REW lever 55 is pressed in the D direction, the F / R interlocking lever 95 is slid in the D direction. Pins 95a and 95b of the F / R interlocking lever 95 press the sensor killer 90, 85 to release the pressing of the sensor lever 29, 28. However, since the sensor killer 84 is pressed against the arm 28c of the T ₂ side sensor lever 28, the sensor lever 28 is killer.
On the other hand, the sensor killer 88 is the sensor lever when the mode is selected.
Since the pressure on 19 is released, when the tape is at the end of the FF or REW and the take-up reel cap and the reel base stop rotating, the end detection operation is started in the same manner as during reproduction.

(2) Continuous mode Figure 13 in T ₂ are shows FOR operating states of the continuous mode in the T _2. The positioning pin 30c of the mode select lever 30 is engaged with the recess 31b of the mode setting plate 31. When the PLAY lever 54 is pressed in the D direction from the stopped state, the sub chassis 76 is pressed in the same direction. Pin 54 formed on the PLAY lever 54
a is locked by the convex portion 59b of the lock plate 59 and the operating state is maintained. At the same time, the pinch operation levers 78 and 79 attached to the sub chassis 76 also slide in the D direction. The pinch operation lever 78 abuts against and presses the spring 72 attached to the T ₁ side pinch roller lever 60, whereby the pinch roller lever 60 is rotated in the F direction with the shaft 63 as a fulcrum. However, the arm portion 60b of the pinch roller lever 60 comes into contact with the convex portion 30k of the mode select lever 30 and the rotation in the F direction is restricted, so the roller portion 60a is not pressed against the capstan 69. On the other hand, when the continuous mode is selected at T ₂ , the slide lever 92 contacts the concave portion 30p of the mode select lever 30, and therefore slides in the B direction as compared with the edit mode. Also, with the sliding of the select lever 30, the blocking lever
Since 93 also slides in the B direction, the pause back lever 82 slides in the D direction without the convex portion 82f being engaged with the blocking lever 93. The pinch operation lever 78 presses the spring 73, and the pinch roller lever 61 is rotated in the F direction about the shaft 64 as a fulcrum. The pinch roller lever 61 is rotated without the arm portion 61b contacting the arm portion 82c of the pause back lever 82, and the roller is rotated. The portion 61a is crimped to the cap stan 70. However, although the pinch operation lever 79 of the pinch roller lever 62 contacts the spring 74, the pinch roller lever 62 is not pressed and the roller portion 62a is not pressed against the capstan 71. Similarly, a play idler, a circuit, or the like (not shown) operates to enter the FOR operation state on the T ₂ side.

Next, the switching operation from FOR to REW and the operating state of REW will be described. FIG. 5 shows the mechanical structure of the FOR state in the continuous mode at T ₂ . In this state, when the end of the tape winding is reached, the sensor lever 28 is rotated by the end cam 20.
It is rotated in the E direction with 18b as the fulcrum. Sensor lever 3
The pin 32d formed on 2 is pressed in the D direction and the end select lever 32 is slid in the same direction. At this time, the convex portion 32b of the end select lever 32 is not in the position to engage with the pin 33a of the lock plate release lever 33, and the lock plate release lever 33 is not operated. On the other hand, the pin 32e formed on the end select lever 32 presses the arm portion 34a of the trigger lever 34, so that the trigger lever 34 is rotated in the E direction with the shaft 34b as a fulcrum, and the protrusion formed on the logic cam gear 35. The engagement with 35a is released. The logic cam gear 35 is rotated in the E direction by a starting spring (not shown),
It meshes with the gear 38 and is rotated in the E direction together with the cam 36. The pin 39a of the program interlocking lever 39 contacts the convex portion 30f of the mode select lever 30, and the program interlocking lever 3
9 pin 39c, when the logic cam gear 35 rotates, the cam 36
Since the logic cam gear 35 is rotated, the pin 39c of the program interlocking lever 39 is pressed by the inner side 36a of the cam 36 and the program interlocking lever 39 is slid in the B direction. It For this reason,
Since the pin 39d formed on the program interlocking lever 39 pushes the arm portion 41a of the cam lock lever 41, the cam lock lever 41 rotates about the shaft 41b in the F direction, and the projection portion formed on the program switching cam gear 42. The engagement with 42a is released. Therefore, the program switching cam gear 42
It is rotated in the F direction by a starting spring (not shown), meshes with the gear 43, and is rotated in the F direction together with the program switching cam 45. Along with this, the program switching cam 45
The program switching lever 46 that is in contact with
Is slid in the B direction by. At this time, the RVS lever 48 attached to the program switching lever 46 does not push the pin 32f formed on the end select lever 32.

FIG. 14 shows the operating state of REV. When the program switching lever 46 slides in the B direction, the contact pin 79a of the pinch operation lever 79, which has been urged by the left inner end surface 46i of the program switching lever 46, is pressed in the same direction, and the shaft 76b is used as a fulcrum in the E direction. To be rotated. The pinch operation lever 79 presses the spring 74 attached to the pinch roller lever 62. The pinch roller lever 62 is rotated about the shaft 65 in the E direction, and the roller portion 62a is pressed against the capstan 71.
On the other hand, the pinch operation lever 78 is B of the program switching lever 46.
With the slide in the direction, the spring 80 rotates the shaft 76c as a fulcrum in the E direction to release the pressure on the spring 73 attached to the pinch roller lever 61, so that the roller portion 61a is not pressed against the capstan 70. It will be canceled. At the same time, a play idler, a circuit, etc., which are not shown, operate to enter the REV operating state.

FIG. 6 shows the mechanical structure in the REV state. At the end of the tape winding in this state, the end select lever 32 is slid in the D direction as described above, but the convex portion 32b does not operate the lock plate release lever 33. On the other hand, the pin 32e pushes the trigger lever 34 to rotate the logic cam gear 35. The pin 39c of the program interlocking lever 39 is inside 3 of the cam 36.
By sliding and pressing 6a, the program interlocking lever 39 is slid in the B direction, and the engagement between the cam lock lever 41 and the program switching cam gear 42 is released. Therefore, the program switching cam gear 42 is rotated in the F direction, so that the program switching lever 46 is pressed in the A direction. As the program lever 46 slides, the pinch operation levers 78 and 79 are rotated to crimp the roller portion 61a of the FOR side pinch roller lever 61 to the capstan 70 and the roller portion 62a of the REV side pinch roller lever 62 and the capstan 71. Release the pressure contact with and switch to the FOR operation shown in Fig. 13 described above.

As described above, in the continuous mode at T ₂ , after the FOR and REV operations, the sensor select 28 is rotated to slide the end select lever 32 to rotate the logic cam gear 35,
The program switching cam gear 42 is rotated through the program interlocking lever 39, and the program switching lever 46 is slid. Then, by switching the pin operation levers 78 and 79, continuous reproduction of FOR and REV is performed.

Next, the killer of the end detection sensor in this mode will be described.

FIG. 13 shows the operating state in the 1-cycle mode at T ₂ . When this mode is set with the mode select lever 30, the sensor killer 84 is
Since the arm portion 30n of the sensor lever 28 is pressed and rotated in the F direction with the shaft 84a as a fulcrum, the pressing of the sensor lever 28 to the arm portion 28c is released. On the other hand, the sensor killer 88 does not press the arms 30l and 30m of the mode select lever 30, but presses the arm 19c of the sensor lever 19. During operation, the sensor killer 20 releases the pressure on the sensor levers 19, 28 by the tip portion 76g of the sub-chassis 76 and the sensor killer 85 by the arm portion 82b of the pause back lever 82. Therefore, the T ₁ side sensor lever 19 has been killed, and the T ₂ side sensor lever 28 has been released. Therefore, at the end of the tape winding, the sensor lever 28 is rotated along with the stop of the rotation of the take-up reel base, and the end select lever 32 is slid to start the switching operation.

Next, the killer of the sensor in the pause state will be described. Similarly to the above, the PAUSE lever 58 is pressed in the D direction, and the pause back lever 82 is slid in the C direction to establish the paused state. Since the arm portion 82b of the pause back lever 82 is released from the pressure on the sensor killer 85, the sensor killer 85 has a spring 87.
By this, the shaft 85a is used as a fulcrum to rotate in the E direction, but since the arm portion 28d of the sensor lever 28 is pressed, the switching operation is not started during the pause. Also FF or REW
At the same time, as in the operation, the sensor killer 90, 85 is released from pressing the sensor lever 19, 28 by the F / R interlocking lever 95. Also, the sensor killer 84 is the sensor lever 28
The pressure on the arm 28c of the sensor killer 88 is released, and the sensor killer 88 is pressed by the arm 19c of the sensor lever 19. Hence T ₁
Side sensor lever 19 is killer, T ₂ side sensor lever
28 means that the killer has been released. Therefore, at the end of winding the FF or REW tape, the sensor lever 28 rotates and the end select lever 32 slides in the D direction as the rotation of the take-up reel base stops. Although not shown, when the FF or REW lever is pressed in the T ₂ mode, the end select lever 32 is pressed in the E direction to rotate the protrusion 32d to the position opposite to the pin 33a of the lock plate release lever 33. Therefore, the end select lever 32
When sliding, the lock plate release lever 33 is slid to be in a stopped state.

(3) Figure 15 during one cycle mode in T ₂ are shows FOR operating state of the one-cycle mode in the T _2. Positioning pin for mode select lever 30
30c is engaged with the recess 31c of the mode setting plate 31. When the PLAY lever 54 is pressed in the D direction from the stopped state, the sub chassis
76 is pressed in the same direction. Pinch movement lever 78,7 at the same time
9 is also slid in the D direction, and the pinch operation lever 78 presses the spring 72 attached to the T ₁ side pinch roller lever 60 to rotate the pinch roller lever 60 in the F direction.
However, the arm portion 60b of the pinch roller lever 60 comes into contact with the convex portion 30k of the mode select lever 30 and the rotation in the F direction is restricted, so that the roller portion 60a is not pressed against the capstan 69.
On the other hand, when the 1-cycle mode is selected in T ₂ , the slide lever 92 is in contact with the concave portion 30p of the mode select lever 30, so that it is slid in the B direction as in the continuous mode in T ₂ . Further, since the blocking lever 93 is also slid in the B direction, the pover back lever 82 is slid in the D direction without the convex portion 82f being engaged with the blocking lever 93. The spring 73 is pressed against the pinch operation lever 78, and F
The pinch roller lever 61 rotated in the direction rotates without the arm portion 61b contacting the arm portion 82c of the pause lock lever 82, and the roller portion 61a is pressure-bonded to the capstan 70. However, although the pinch operation lever 79 contacts the spring 74 but does not press the pinch roller lever 62, the roller portion 62a
Is not crimped onto the capstan 71. Similarly, a play idler, a circuit, and the like (not shown) operate to enter the FOR operation state on the T ₂ side.

Next, the switching operation from FOR to REV and the operating state of REV will be described. FIG. 7 shows the mechanical structure of the FOR state in the one cycle mode at T ₂ . When the tape winding is completed in this state, the end select lever 32 is slid in the D direction to press the trigger lever 34 and rotate the logic cam gear 35, as in the continuous mode at T ₂ . The pin 39c of the program interlocking lever 39 is inside 3 of the cam 36.
6a slides and slides in direction B, and cam lock lever
Press 41. Therefore, the program switching cam gear 42
Is rotated in the F direction, and the program switching lever 46 is slid in the B direction. At this time, the RVS lever 48 attached to the program switching lever 46 and positioned by the pin 30h of the mode select lever 30 is also slid in the B direction,
The pin 32f formed on the end select lever 32 facing in the sliding direction is abutted, and the convex portion 32b of the end select lever 32 is pressed to a position where it engages with the pin 33a of the lock plate release lever 33. Rotating the slide with the pinch operation lever 78, 79 of the continuous mode similar program switching lever 46 in the T _2, together with releasing the pressure contact between the roller portions 61a and the capstan 70 of the FOR-side pinch roller lever 61, REV-side pinch The roller portion 62a of the roller lever 62 is pressure-bonded to the capstan 71. Play idler, circuit, etc. are also switched, T ₂ side RE
It becomes V operation state.

FIG. 8 shows the mechanical structure in the REV state. At the end of the tape winding in this state, the end select lever 32 is slid in the D direction as described above. Therefore, the convex portion 32b formed on the end select lever 32 presses the pin 33a of the lock plate release lever 33, slides the lock plate release lever 33 in the D direction, and connects the lock plate 59 and the PLAY lever 54. The engagement is released to stop the operation.

As mentioned above, in 1 cycle mode in T ₂ , from FOR to R
When switching to EV, press the end select lever 32 with the RVS lever 48 attached to the program switching lever 46, and
After the operation, as the end select lever 32 slides, the lock plate release lever 33 slides to be in a stopped state.

Next, the killer of the end detection sensor in this mode will be described.

FIG. 15 shows the operating state in the 1-cycle mode at T ₂ . When this mode is set with the mode select lever 30, the sensor killer 84 is pressed by the arm portion 30n of the mode select lever 30 as in the continuous mode at T ₂ .
The pressing of the sensor lever 28 on the arm 28c is released. On the other hand, the sensor killer 88 is not pressed by the arm portions 30l and 30m of the mode select lever 30, but is pressed by the arm portion 19c of the sensor lever 19. Also during operation, the sensor killer 90, 85 is released from pressing the sensor levers 19, 28, respectively, as described above. Therefore, since the T ₁ side sensor lever 19 is killed and the T ₂ side sensor lever 28 is released, the sensor lever 28 is rotated and the switching operation is started at the end of the tape winding. Further, the killer of the sensor in the pause state, FF or REW state is the same as that in the continuous mode in T ₂ described above, and therefore the description thereof will be omitted.

(4) In continuous mode FIG. 9 shows the operating state in continuous mode. The positioning pin 30c of the mode select lever 30 is the mode setting plate 31.
Engages with the recess 31d. The slide lever 92 is in contact with the end surface 30o of the mode select lever 30. When the PLAY lever 54 is pressed in the D direction from the stopped state, the sub chassis 76 slides in the same direction. Pinch movement lever
78 presses the spring 72 attached to the pinch roller lever 60 on the T ₁ side to rotate the pinch roller lever 60 in the F direction. The arm portion 60b of the pinch roller lever 60 is rotated without being restricted by the convex portion 30k of the mode select lever 30, and the roller portion 60a is pressed against the Kipstan 69. On the other hand, as the sub chassis 76 slides, the pause back lever 82, which is slid in the D direction by the spring 83, has a convex portion.
82f contacts the blocking lever 93 and the slide is stopped.
Therefore, the T ₂ side pinch roller lever 61 rotated in the F direction by the spring 73 being pressed by the pinch operation lever 78 is
The rotation of the arm portion 61b comes into contact with the arm portion 82c of the pause back lever 82, whereby the rotation is restricted, and the roller portion 61a moves to the capstan 7
Do not crimp to 0. In the REV side pinch roller lever 62, the pinch operation lever 79 comes into contact with the spring 74 but does not press it, so that the roller portion 62a is not pressed against the capstan 71.
At the same time, a play idler, a circuit, etc., which are not shown, operate, and the reproduction state on the T ₁ side is set.

Next, the switching operation from T ₁ to T ₂ will be described. FIG. 9 shows the mechanical structure in the continuous mode. When the tape is wound in this state, the end select lever
Although 32 is slid in the D direction, the convex portion 32b does not press the pin 33a of the lock plate release lever 33. On the other hand, the pin 32e presses the trigger lever 34 to rotate the logic cam gear 35. The cam 37 formed on the logic cam gear 34 presses the built-up portion 30e of the mode select lever 30 to a position facing the one cycle mode of T ₂ . That is, the positioning pin 30c of the mode select lever 30 is slid from the convex portion 31d of the mode setting plate 31 to the convex portion 31c. As described above, the mode select lever that slid
The convex portion 30k of 30 presses the arm portion 60b of the T ₁ side pinch roller lever 60 to release the pressure contact between the roller portion 60a and the capstan 69. On the other hand, the slide lever 92 comes into contact with the convex portion 30p of the mode select lever 30, whereby the engagement between the blocking lever 93 and the convex portion 82f of the pause back lever 82 is released. Therefore, the arm portion 61b of the T ₂ side pinch roller lever 61 is not regulated by the arm portion 82c of the pause back lever 82 and rotates in the F direction, so that the roller portion 61a is pressed onto the capstan 70. When the logic cam gear 35 rotates, the pin 39c of the program interlocking lever 39 passes outside the cam 36, so the program interlocking lever 39 does not slide. In addition, the play idler, circuits, etc. (not shown) operate, and
It becomes the 1-cycle mode FOR state at T ₂ in the figure).
After that, it switches to REV at the end of the FOR tape winding, and stops at the REW winding end.

Next, the killer of the end detection sensor in this mode will be described.

FIG. 16 shows an operation state in the continuous mode. When this mode is set by the mode select lever 30, the sensor killer 88 is pressed by the arm portion 30l of the mode select lever 30, and the pressing of the sensor lever 19 by the arm portion 19c is released. Also the sensor killer 90 is a sub chassis when operating
Pressed by the tip 76g of 76, the arm 19d of the sensor lever 29
Is released. Therefore, at the end of winding the tape, the rotation of the take-up reel cap and reel base is stopped,
Start switching operation. On the other hand, the arm 28c of the sensor lever 28
Has a sensor killer 84, and arm 28d has a sensor killer 8
Since 5 is pressed respectively, regardless of the rotation of the take-up reel stand, the same sliding as during operation is given,
No switching operation is performed.

Next, the killer of the sensor at the time of FF or REW will be described. In the tape recorder according to the embodiment of the present invention, FF or REW operates on the T ₁ side when the continuous mode is selected. When the FF lever 56 or REW lever 55 is pressed in the D direction from the stopped state, the F / R interlocking lever 95 slides in the same direction, and the pin 95a and the pin 95b press the sensor killer 90 and 85, respectively, and the sensor lever 19 and Release the pressure on 28. However, the arm 28c of the T ₂ side sensor lever 28
Since the sensor killer 84 is pressed against the sensor lever 28, the sensor lever 28 is killed. On the other hand, the sensor killer 88 is released from pressing the sensor lever 19 when the mode is selected. When the FF lever 56 or the REW lever 55 is pressed, the end select lever 32 is pressed in the E direction, and the convex portion 32
Since d is rotated to a position facing the pin 33a of the lock plate release lever 33, when the end select lever 32 slides at the end of FF or REW winding, the lock plate release lever 33 slides and the stop state is set. Become.

(G) Effect of the Invention According to the present invention, when the edit mode is selected by the mode select lever means and then only the play lever means is operated, the first tape operation state in which only the first cassette tape runs at a constant speed, When both the play lever means and the recording lever means are moved to the operating position, the first and second cassette tapes both run at a constant speed, and the first cassette tape is played back and the second cassette tape is recorded at the same time. Since the state can be brought into the state, the mode switching in the dual tape recorder becomes easier, and the epoch-making mode selection can be performed by effectively utilizing the play lever means.

[Brief description of drawings]

1 to 16 are views showing an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of an essential part showing an arrangement when a cassette tape is mounted, and FIG. 2 is a front view showing an operation button part. FIGS. 3 (a) and 3 (b) are a longitudinal sectional view showing an auto stop sensor section and a plan view of a main part, FIGS. 4 to 9 show a mechanical structure, and FIG. 4 is an edit mode. When, Fig. 5 shows T ₂
Continuous Mode FOR state in the continuous mode of REV state Figure 6 is in T _2, FIG. 7 is FOR state one cycle mode in the T _2, FIG. 8 is REV in one cycle mode in the T ₂ State, Fig. 9 shows the first in the continuous mode
Figures 0 to 16 show the switching mechanism of the sensor killer and pinch roller. Figure 10 shows the stopped state in the edit mode, Figure 11 shows the T ₁ playback state in the edit mode,
Figure 12 shows the dubbing state in edit mode, and Figure 13 shows T ₂
FOR playback state of continuous mode in, Fig. 14 REV reproduction state of a continuous mode in the T _2, FIG. 15 FOR reproduction state of one cycle mode in the T _2, FIG. 16 reproduction state in continuous mode Is shown. 1,2 …… Cassette tape, 3,4 …… Capstan, 6,7,8 …… Pinch roller, 30 …… Mode select lever, 53 …… REC lever, 54 …… PLAY lever, 59 …… Lock plate , 60,61,62 …… Pinch roller lever 76 …… Sub chassis, 78 …… Pinch movement lever, 82 …… Pauseback lever, 93 …… Blocking lever.

Claims (1)

[Claims] 1. A first and second two cassette tapes are stacked and stored in one tape storage portion, and one capstan shaft is made to correspond to these cassette tapes, and the capstan shaft is provided with the first and second capstan shafts. By contacting the first and second pinch rollers corresponding to the second cassette tape, respectively, the first and second cassette tapes are moved from the non-operating position to the operating position in the dual tape recorder that runs at a constant speed. In the mode in which the play lever means for advancing the sub-chassis and bringing the first and second pinch rollers into contact with the capstan shaft when the second cassette tape is operable,
The forward lever is operated together with the sub-chassis by the operation of the play lever means to allow the contact between the second pinch roller and the capstan shaft, and the forward movement is prevented in a mode in which the second cassette tape cannot operate. And a pinch roller blocking lever means for blocking contact between the second pinch roller and the capstan shaft, and a blocking lever for blocking the pinch roller blocking lever means in a mode in which the second cassette tape cannot operate. Means, a recording lever means for putting the circuit into a recording state when the circuit is moved from the non-operating position to the operating position, and the blocking lever means for moving the recording lever means forward to move the blocking lever means to the pinch roller blocking lever means. Freezing lever means brought to a non-blocking state, first or second tape mode, and edit mode for simultaneously driving the first and second tapes Mode select lever means for allowing each position to be selectively taken, and the mode select lever means cooperates with the play lever means to select the first pinch roller according to each of these modes. And a capstan shaft for engaging the capstan shaft with the first pinch roller to prevent the first pinch roller from contacting the capstan shaft. When the edit mode is entered and the play lever means is operated to the operation position, the first pinch roller does not engage with the first pinch roller because the contact preventing means does not engage with the first pinch roller. The second pinch roller is prevented from abutting against the capstan shaft by contacting the pinch roller blocking lever means with the blocking lever means, and the second pinch roller is blocked from contacting the capstan shaft. Only a cassette tape as a first tape operating state to constant speed running, also take the edit mode by the mode select lever unit,
When the play lever means and the recording lever means are operated to the operating position, the abutment preventing means and the first pinch roller are not engaged by the operation of the play lever means, and are connected by the operation of the recording lever means. The first and second lever means move forward and press the blocking lever means to a position allowing the forward movement of the pinch roller blocking lever means.
Pinch roller contacts the capstan shaft to run both the first and second cassette tapes at a constant speed, so that the first cassette tape is played back and the second cassette tape is recorded at the same time. The mode switching mechanism of the characteristic double tape recorder.