JPH07101530B2 - Tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a tape recorder in which a first cassette mechanism and a second cassette mechanism are arranged side by side.

(B) Prior Art A tape recorder in which the first cassette mechanism and the second cassette mechanism are arranged side by side is generally called a double cassette tape recorder and has a large number of configurations.

Since such a tape recorder can selectively operate the first cassette mechanism and the second cassette mechanism, or can simultaneously operate each mechanism,
It is useful for tape dubbing. In recent years, it is also known that the first cassette mechanism or the second cassette mechanism can be reproduced on the A side (forward direction) and the B side (reverse direction), or equipped with an automatic music selection function.

As a conventional example of this kind of tape recorder, for example, Japanese Patent Laid-Open No. 61
No. 9855 (G11B 15/10), two motors are operated by a single motor, which is described in JP-A-57-109153 (G11B 15/02). It is known that the mechanism switching operation is executed using the rotational force of the motor.

Also, the operation mode of the tape recorder is switched by a command signal by the operation of an electrical switch, and in addition the mechanism switching operation is executed by utilizing the rotational force of the motor and the head is rotated 180 degrees. A bidirectional reproducing tape recorder which is configured to execute the reproducing operation on the A side (forward direction) and the B side (reverse direction) is also disclosed in Japanese Examined Patent Publication No. 62-2338.
It is known from Publication No. 5 (G11B 15/44).

(C) Problems to be Solved by the Invention As described above, tape recorders having various configurations have been conventionally known. However, in the double cassette tape recorder,
Each mechanism is equipped with an operating means and a mechanism switching member (cam gear when using the rotational force of the motor). Also, in the logic control type tape recorder, a plurality of mechanism control members are used. However, there is a problem in that the entire structure is complicated and the cost is high.

(D) Means for Solving the Problems In order to solve the above problems, the present invention provides a first cassette mechanism having A-side reproduction and B-side reproduction functions and a fast winding function, and a first cassette mechanism having both functions. In a tape recorder equipped with a two-cassette mechanism, a. Mechanism selecting means for operating one or both of the above-mentioned mechanisms, and b.
Head channel switching means for simultaneously switching to the surface, c. Winding direction selecting means for switching each reproduction winding system of each mechanism to the A surface or B surface, and d. A reproduction winding system or high speed of each mechanism. A winding system selecting means for selecting a winding system, and e. An operation command for selecting or simultaneously operating the first and second cassette mechanisms, and a suction operation timing of the plunger in response to a reproduction or high-speed winding mode command. (EN) Provided is a tape recorder comprising a single cam gear which is rotationally controlled by a rotational force of a motor and which operates each of the above means.

(E) Operation According to the present invention including the above means, the reproduction operation and the high-speed winding operation of the first cassette mechanism and the reproduction operation and the high-speed winding operation of the second cassette mechanism can be executed by the same cam gear. it can. The first and second mechanisms can be selectively operated by the mechanism selecting means, and can be operated simultaneously.

(F) Examples Examples of the tape recorder of the present invention shown in the drawings will be described below.

First, the components and operation functions of the tape recorder of the present invention will be described with reference to FIGS. 1 to 7.

(1) is a mechanism chassis, which is a first cassette mechanism (I) for the first cassette (C1) shown by a chain line and a two-cassette mechanism (I) for a second cassette (C2) shown by a chain line.
I) consists of a synthetic resin molded product in which each part is arranged to be arranged side by side, and the rotary shaft of each part, the guide boss that guides the movement of the lever, the cassette receiver, the post pin, etc. are also integrally molded. There is.

In FIG. 1 which is a top view of the mechanism chassis (1), (2) and (3) are head support plates, and each head support plate (2) and (3) is rotated by 180 degrees to the A surface of the tape. Head devices (4) and (5) for switching the facing relationship of the heads to the channel and the B-side channel are provided, and move in the vertical direction of the drawing together with the head support plate. The structure of the head device is the same as that described in Japanese Patent Publication No. 62-23385.

Pinch lever assembly (6) (7) (8) (9)
Are the shafts (1a) (1b) (1c) (1
It becomes possible to rotate around d), and the boss parts (6a) (7a) (8
a) (9a) is each hole (2a) of each head support plate (2) (3)
(2b) (3a) (3b) penetrating through pinch wires (10) (11) (12) (13) respectively.
(15) (16) (17) Capstan (18) (19) (20)
It urges toward (21). (22) (23) (2
4) (25) is the take-up reel shaft.

(26) and (27) are head support plates (2) and (3) and springs (28)
The relay levers are connected by (29), and the relay levers (26) and (27) are rotatable on the shaft portions (1e) and (1f) on the chassis. Reference numerals (30) and (31) denote springs that bias the head support plates (2) and (3) downward (stop position) in the figure.

In FIG. 2 which is a bottom view of the mechanism chassis (1), (32), (33), (34) and (35) are rotationally driven through belts (37) and (38) using a single motor (36) as a drive source. In the flywheel, the flywheels (32, 33) rotate in opposite directions, and the flywheels (34, 35) rotate in opposite directions. (39) (40)
(41) and (42) are gear parts integrated with each flywheel. (43), (44), (45) and (46) are regenerative winding relay gears that compose a regenerative winding system. Gears (43) (44) and gears (45) (46) are placed vertically and have a slip mechanism. Transmitting torque, the gears (43) and (44) are rotatably provided on a lever (47) rotatable around the bearing portion of the flywheel (33), and the gears (45) and (46) are flywheels. (35)
It is rotatably provided on a lever (48) rotatable about the bearing part of the.

The relay gear (43) always meshes with the gear portion (40) of the flywheel (33), and the relay gear (45) always meshes with the gear portion (42) of the flywheel (35).

(49) and (50) are the shaft part (1g) (1h) of the chassis (1).
The lever (4
7) When (48) rotates counterclockwise in the figure, the gears (44) (4
6) It is in a relationship that meshes with.

(51) and (52) are conversions that are rotatably provided on support shafts (55) and (56) provided on levers (51) and (52) that are rotatable around the shaft portions (1g) and (1h). One of the conversion gears (5
1) meshes with the gear (49), and the other conversion gear (52) meshes with the gear (50).

(57) (58) (59) (60) are the take-up reel shaft (22)
(23) (24) (25) take-up reel gears, the reel gears (58) (60) mesh with the small gears (61) (62) supported by the chassis shafts (1i) (1j) ing.

When the levers (53) (54) are rotated counterclockwise, the gear (51) is the gear (62) and the gear (52) is the gear (61).
The gear (51) meshes with the gear (59) and the gear (52) meshes with the gear (57) at a position where the levers (53) and (54) rotate clockwise.

The lever (53) is urged by a stepper spring (63) connected to a spring hook portion of the chassis in different rotational position directions with moderation.

The above is the description of the reproduction winding system for executing the reproduction operation.

Next, the high-speed winding system will be described.

(64) and (65) are the shafts (68) of the high-speed drive levers (66) and (67) that are rotatable about the rotary shafts (1g) and (1h).
It is a high-speed gear rotatably provided at (69). The gear (64) is transmitted by a belt (70) hung on a pulley unit integrated with the gear (49), and the right gear (65) is similar to the gear (50) in the belt (71). ) Is to be transmitted by power.

And the gear (64) is the flywheel gear (39),
The gear (69) is in mesh with the gear (41) of the flywheel by the high speed drive levers (66, 67) rotating counterclockwise.

Therefore, in the case of the mechanism on the left side, the rotation of the flywheel (32) is transmitted to the gear (64) and the power is transmitted by the belt (70) as a drive for high-speed winding. Then, it is transmitted to the reel gears (60) or (59) depending on the left / right rotation position of the gear (51), and either reel shaft is rotated at a high speed to execute a high-speed winding operation.

Next, the part of the mode switching mechanism will be described.

(72) is substantially in the center between the first cassette mechanism located on the right side (left side in FIG. 1) in FIG. 2 and the second cassette mechanism located on the left side (right side in FIG. 1) in FIG. A single cam gear rotatably provided on the shaft portion (1k) of the chassis (1). The cam gear (72) has a first toothless portion (73) on the side of the first cassette mechanism when the tape recorder is stopped. It opposes the gear part (74) of the flywheel (34) in (1) and appropriately meshes with the gear part (74) during mode switching to rotate.

Here, FIG. 4 (A) shows one surface of the cam gear (72), and FIG. 4 (B) shows the other surface of the cam gear (72). On one surface of the cam gear (72), a first locking protrusion (75, a second toothless portion (76) that locks the first toothless portion (73) at a position facing the gear portion (74) is provided. A first concave cam part (78) having an inner wall having a second locking part (77) locked at a position facing the part (74), and a passage (80) (8) sandwiching the branch part (79).
And a second concave cam portion (82) having (1) and.

Further, on the other surface of the cam gear (72), a concave cam portion (87) having an engaging portion (83) on its inner wall and having passages (85) and (86) sandwiching the branch portion (84). And a convex cam portion (88) consisting of a portion having an equal diameter from the shaft and a portion having a different diameter from the shaft is provided.

Further, a reset projection (89) is provided.

(90) is a main trigger lever, and the trigger lever (90)
Is rotatable about the shaft (11) of the chassis,
The plunger (91) is turned on / off at an operation timing corresponding to each mode shown in the figure to rotate clockwise by the suction operation.

(92) is the same as the main trigger lever (90).
1) is a sub-trigger lever that rotates around the main trigger lever (92) and the spring (9).
3) and is normally connected by both trigger levers (9
0) and (92) rotate integrally.

The locking pin (95) of the first arm (94) of the main trigger lever (90) is connected to the first concave cam portion (7) of the cam gear (72).
8) (see FIG. 4A), and the cam gear (72) is engaged by the suction operation of the plunger (92).
Control the rotation of.

The second arm (96) of the main trigger lever (90)
And the third arm (97) are respectively the high speed drive lever (66).
The high-speed drive levers (66) (67) are rotated toward the operating position by facing the one end of (67) and by the suction operation of the plunger (91).

The high-speed drive levers (66) (67) are springs (98).
It is urged clockwise by (99) so that it is in the inoperative position.

Reference numeral (100) is a head switching slide that is movable left and right by a guide shaft (1m) (1n) of the chassis. A follower pin (101) fixed to the head switching slide (100) is attached to the cam gear (72). It is fitted in the concave cam portion (87) (see FIG. 4B), and follows the cam shape to move a constant stroke in the left-right direction in FIG.

As shown in FIGS. 6 and 7, the head switching slide (100) is a rotary head device (4) (5) for the left and right cassette mechanisms, a pinch lever assembly (6) (7).
(8) Associated with (9). That is, the cut-and-raised parts (102) (103) of the head switching slide (100) are engaged with the head-switching levers (104) (105), and the cut-and-raised parts (106) (107). (108) and (109) are adapted to engage with the boss portions (6a) (7a) (8a) (9a) of each pinch lever assembly (6) (7) (8) (9).

The configuration of these switching is, for example, Japanese Patent Publication No.
Since the configuration is substantially the same as the configuration shown in FIG. 10 of Japanese Unexamined Patent Publication No. -23385, detailed description will be omitted.

The head switching slide (100) has an engaging bent piece (11
0) is formed, and the engaging bent piece (110) is in a relationship of engaging with the operation pin (101) provided at one end of the lever (53).

In addition, the head switching slide (100) is moved to the second position by a linear spring (112) wound around the fixed portion (1o) of the chassis.
It is always biased to the right in the figure.

Reference numeral (113) is a winding switching slide for switching the reproduction winding direction of the mechanism on the right side in FIG. 2, which is slidable left and right by the guide shaft (1p) of the chassis and is moved by the linear spring (112) to the second position. It is always biased to the right in the figure. A follow-up pin (114) provided at one end of the winding switching slide (113) is fitted in the second concave cam portion (82) on one surface of the cam gear (72), and the winding is performed by rotation of the cam gear. The switching slide (113) slides left and right.

The winding switching slide (113) is connected to the lever (54) by a tension spring (115). As a result, the lever (5) is interlocked with the displacement of the winding switching slide (113).
4) turns left and right.

Further, the winding switching slide (113) is provided with a projecting wall (118) facing the operating portion (117) of the fourth arm (116) of the main trigger lever (90). A projecting wall (119) is also provided on the head switching slide (100) so as to face the operating portion (117) of the fourth arm (116) (see FIG. 5).

Next, the drive of the head support plates (2) and (3) and the selection mechanism of the drive mechanism will be described.

(120) is a drive slide for driving the head support plates (2), (3), and the drive slide (120) is provided so as to be movable in the vertical direction along the guide shafts (1k) (1q) in FIG. And is always urged upward by the linear spring (121).

The follow-up bent portion (122) of the drive slide (120) is engaged with the convex cam portion (88) of the cam gear (72) as is clear in FIG. 3, and moves up and down as the cam gear (72) rotates. Slide in the direction.

On the upper surface of the drive slide (120), there is provided a selection slide (123) for selecting a drive mechanism which is slidable in two positions which are different from each other in the left and right in FIG. 2, and the selection slide (123) is a spring (124). Always urged to the left by.

The bent piece (125) on the right side of the selection slide (123) faces the position where it engages with the sub-trigger lever (92),
Also, the pair of bent pieces (126) (127) facing each other protrude from the through holes (1r) (1s) of the chassis (1) and are selected as relay levers (26) (27) as shown in FIG. Are engaged with each other.

Reference numeral (125) is a lock lever that is rotatable around the guide shaft (1q) to lock the position where the drive slide (120) slides downward in the figure, and the lock lever (125) is the drive slide (120). A lock claw (127) that engages with the protrusion (126) of the cam gear (72) and a reset protrusion (128) that faces the reset protrusion (89) of the other surface of the cam gear (72) (first). (See Figure 5).

Reference numeral (129) is an operation detection switch which is turned on when the drive slide (120) is slid to the lower position and locked.

FIG. 8 shows various operation modes for selectively operating the first and second cassette mechanisms and suction operation timing of the plunger (91) for executing the dubbing operation mode for simultaneously operating the first and second cassette mechanisms, and the motor. It is a timing chart showing the operation timing of (36). In this timing diagram, the part where the pulse rises is the suction state of the plunger (91) and the motor (3
6) Shows the rotating state. In the figure, the rotation of the cam gear (72) is started from the first toothless portion (73) by the main trigger lever (90) and the second toothless portion (7
At the position of 6), it shows the state where each operation mode is executed by the time the mesh with the gear (74) of the flywheel is disengaged.
Due to the stop command, the cam gear (72) causes the second toothless portion (76).
It shows a state in which it slightly rotates from and stops at the position of the first toothless portion (73).

The tape recorder of the present invention is configured as described above, and its operation will be described below.

Selection of First and Second Mechanisms When the plunger (91) is sucked by the pulse (P1) of FIG. 8 from the stopped state of FIGS. 1 and 2, the state shown in FIG. 10 is obtained. That is, the suction of the plunger (91) causes the main trigger lever (90) to rotate clockwise, and
The locking pin (95) of the arm (94) is disengaged from the first locking part (75) of the concave cam part (78) of the cam gear (72), and
The cam gear (72) rotates slightly counterclockwise by contacting the inclined surface facing the locking portion, and the toothed portion meshes with the gear (74) of the flywheel (34) to start rotation.

Then, the drive slide (120) follows the convex cam portion (88) of the cam gear (72) and slides downward in the drawing.

FIG. 11 is a view for explaining the operation of each relay lever (26) (27) seen from above the chassis (1).
6) The head support plates of the first cassette mechanism on the left side and the second cassette mechanism on the right side are operated by the selection or simultaneous operation of (27).

That is, when the drive slide (120) slides downward from the state shown in FIG. 11 (A) without sucking the plunger (91), the selection slide (123) as shown in FIG. 11 (Aa).
[At this time, since the plunger is not performing the suction operation, it is in the first position, which is slid to the right side in the figure.] Means that the bent piece (127) on the right side engages with the relay lever (27) on the right side, (27) will be rotated counterclockwise. The rotation of the relay lever (27) is the second one located on the right side in FIG.
Spring (29) for the head support plate (3) of the cassette mechanism
It moves upward from the stop position to bring it to the reproduction position through, and the operation selects the second cassette mechanism.

Next, in the state of FIG. 11 (A), the plunger (91) is sucked, and the selection slide (123) slides to the left side of the figure to the second position.
(0) slides downward in the figure, the bent piece (126) on the left side of the left relay lever (2
By engaging with 6), the relay lever (26) is rotated clockwise. The rotation of the relay lever (26) moves the head support plate (2) of the first cassette mechanism located on the left side in FIG. 1 from the stop position to the reproduction position through the spring (28), The operation is performed by selecting the first cassette mechanism.

Also, from the state of FIG. 11 (B), the cam gear (72) is slightly more
Is rotated and the drive slide (120) slides downward, and the bent piece (126) of the selection slide (123) and the tip projection (26a) of the left relay lever (26) are engaged by δL in the figure. When the suction operation of the plunger (91) is released with, the bending piece (127) has a clearance of δM in the figure with the relay lever (27) on the right side, so that the state becomes as shown in FIG. 11 (C). However, from this state, the cam slide rotates to drive the slide (12
(0) slides further downward,
As shown in c), the left and right relay levers (26) and (27) rotate, and the head support plates (2) and (3) of the first and second cassette mechanisms move upward together to reproduce the recording position (recording position). Position), and a dubbing mode can be set in which the first cassette mechanism side is a reproducing operation and the second cassette mechanism side is a recording operation.

As described above, the selection operation of the first and second cassette mechanisms and the simultaneous operation of the first and second cassette mechanisms can be executed.

Selection of A-side and B-side rewinding winding system Fig. 12 shows the cam gear (72) and its related parts with the rotation angle of the cam gear (72) changed, corresponding to Fig. 2. It will be described together with FIG.

First, FIG. 12 (A) shows the positional relationship in the stopped state, and shows the locking pin (9) of the first arm (94) of the main trigger lever (90).
5) is locked to the first locking portion (75), and the cam gear (7
In 2), the first toothless portion (73) faces the gear (74).
When the plunger (91) is momentarily attracted by the pulse (P1) in Fig. 8 in this state, the locking pin (95) of the plunger (91) disengages from the first locking portion (75) and simultaneously abuts on the opposite light slope. Rotate the cam gear (72) slightly counterclockwise,
The toothed portion of the cam gear (72) meshes with the gear (74), resulting in the state shown in FIG. In this state, the head switching slide (100) is engaged with the engaging portion (8) of the cam gear (72) and the concave cam portion (87).
By 3), it will be slid once to the right in the figure, and by this slide of the head switching slide (100), the rotary head device of each mechanism must be A side (forward direction).
It is reset to the playback (recording) position.

Then, when the cam gear (72) further rotates, the follower pin (101) on the head switching slide (100) approaches the end of the branch portion (84) of the concave cam portion (87) on the other surface of the gear, and FIG. It becomes the state of C).

At this time, depending on whether or not the plunger (91) is performing the suction operation, the follow-up pin (101) may move the passage (85) or the passage (8).
Go through 6).

That is, if the plunger (91) is sucking at this time,
Since the head switching slide (100) is pressed to the left by the operating portion (117) of the fourth arm (116) of the main trigger lever (90), the follow-up pin (101) is moved to the outside passage (8).
5) will be passed.

However, the head switching slide (100) is located in this passage (85).
Following this, the rotary head device is switched to the B-side (reverse direction) reproduction (recording) channel, and the pinch lever assembly is correspondingly switched.

At the same time, the lever (53) of the second cassette mechanism (the left side in FIG. 2) rotates clockwise in the same figure, and the gear (51) on the lever (53) meshes with the take-up reel gear (59). Then, the mechanism is in a state in which a winding system for B-side (reverse direction) reproduction is selected.

On the other hand, if the plunger (91) is not sucking at this time, the head switching slide (100) is not pressed to the left, so the follower pin (101) passes through the inner passage (86).
The head switching slide (100) follows this passage, is displaced to the right, and then returns to its original position, so that the rotary head device remains in the A-side (forward direction) playback (recording) channel and is then moved to the second position. The reel of the cassette mechanism is wound on the gear (5
1) meshes with the gear (62), and the mechanism is in a state in which a winding system for A-plane (forward direction) reproduction is selected.

Then, when the cam gear (72) further rotates, the follow-up pin (114) of the winding switching slide (113) reaches the end of the branch portion (79) of the second concave cam portion (82) on the one surface of the cam gear (72), The state shown in FIG. 12 (D) is obtained.

At this time, depending on whether or not the plunger (91) is performing the suction operation, the follow-up pin (114) moves to the passage (80) or the passage (8).
Pass 1).

That is, if the plunger (91) is performing the suction operation, the operation portion (117) of the fourth arm (116) of the main trigger lever (90).
Since the take-up switching slide (113) is pressed leftward, the follow-up pin (114) passes through the inner passage (80).

Therefore, the take-up switching slide (113) slides to the left, and the lever (54) of the first cassette mechanism on the right side in FIG. 2 rotates clockwise in FIG. 2 to rotate the gear (52) on the lever.
Meshes with the take-up reel gear (57),
The winding system for plane (reverse direction) reproduction is selected.

On the other hand, if the plunger (91) is not sucking at this time, the take-up switching slide (113) is not pressed to the left, so the follow-up pin (114) passes through the outer passage (81) and the take-up switching is performed. Slide (113) slides to the right and
The lever (54) of the first cassette mechanism on the right side in the figure rotates counterclockwise in the figure, and the gear (52) on the lever meshes with the gear (61), so that the mechanism reproduces the A surface (forward direction). The winding system for is selected.

The rotation of the cam gear (72) causes the second toothless portion (76) of the cam gear (72) to face the gear (74) and to move the gear with respect to the locking pin (95) of the first arm (94) of the main trigger lever (90). The rotation is stopped by locking the second locking portion (77) of the first concave cam portion (78), and the state becomes as shown in FIG. 12 (E) or FIG. 12 (F).

Operation selection between the rewinding system and the high-speed rewinding system The drive slide (120) has the follow-up bending part (122) engaged with the convex cam part (88) of the cam gear (72), so that the cam gear does not rotate. It follows and slides up and down, but the cam gear (7
In the initial stage of the rotation of 2), the relay levers (26) and (27) are not yet rotated in the state in which they are slid downward slightly for mechanism selection, that is, in the state of FIG. Plates (2) and (3) have not moved either. Furthermore, the state in which the selection operation of the winding system for the A side and B side reproduction described above is completed,
That is, the same is true until the state shown in FIG.

The operation of the reproduction winding system and the operation of the high-speed winding system are selected by further rotating the cam gear (72) and the head support plate (2).
This is executed depending on whether or not the plunger (91) is sucked when (3) slides further downward.

That is, when the plunger (91) is not sucked, the head support plates (2) and (3) move upward by a full stroke. By this movement, the response pins (47a) (48a) on the levers (47) (48) of the reproduction winding gears (44) (46) [first
As shown in the figure, it protrudes from the through hole of the chassis to the upper surface]
Is the cam surface (2 ') of the head support plate (2) (3)
Separated from (3 '), the levers (47) and (48) rotate in the clockwise direction in FIG. 1 (counterclockwise direction in FIG. 2), and the regenerative winding relay gears (44) (46). ) Is the gear (49) (50)
Mesh with.

By the above operation, the operation of the reproduction winding system is selected.

Next, when the head support plates (2) and (3) move while the plunger (91) is sucked, the plunger (91)
2, the main trigger lever (90) is rotated clockwise in FIG. 2, so that the second arm (96) of the trigger lever moves the left high speed drive lever (66) counterclockwise and the third arm. (97) Rotate the high speed drive lever (67) on the right side counterclockwise.

Due to this rotation, the control pins (130) (131) at one end of the high speed drive levers (66) (67) [projecting upward from the through holes of the chassis as shown in FIG. 2) In the state where the control pins (130) (131) face the tilt control grooves (132) (133) in this way, the tilt control grooves (132) (133) face the entrances. When the head support plates (2) and (3) move upward in the figure, the high speed drive levers (66) and (67) come into contact with the tilt control grooves (132) and (133) and further rotate counterclockwise, The gears (64) (65) mesh with the gears (39) (41) of the flywheel. At the same time, the tilt control grooves (132) (133) of the head support plates (2) (3) come into contact with the control pins (130) (131) to prevent full stroke movement.

The moving positions of the head support plates (2) and (3) are so-called cue and review positions, and at this time, the reaction pins (47a) and (48a) of the levers (47) and (48) move to the head support plates (2) and (3). ) Remains engaged with the cam surfaces (2 ') and (3') of the rear winding relay gears (44) (46) to the gears (49) (50).
Never bite into.

With the above operation, the operation of the high speed winding system is selected.

As described above, if the head support plates (2) and (3) move upward and the drive slide (120) slides upward by a full stroke, as shown in FIG. The protruding piece (126) of the 120) is the lock lever (12
The position is held by engaging with the lock claw (127) of 5).

With the above, selection of the first and second cassette mechanisms, A
The selection of the rewinding system for the B-side and B-side replays, and the operation selection of the rewinding system and the high-speed rewinding system were explained. These selection actions were performed according to the timing chart shown in FIG. Also, by controlling the rotation of the motor, it is possible to execute the desired mode shown in FIG.

The modes in the figure are the * A side (forward direction) playback of the first cassette mechanism N-PLAY * B side (reverse direction) playback R-PLAY * A side (forward direction) cue N-CUE * A side (forward direction) Direction) Review N-REVIW * B side (reverse direction) Cue R-CUE * B side (reverse direction) Review R-REVIW * A side (forward direction) playback of the second cassette mechanism N-PLAY * B side (reverse direction) ) Play R-PLAY * Fast forward FF * Rewind REW As dubbing * A side dubbing N-DUB * B side dubbing R-DUB.

To return from the above operation modes to the stopped state, the plunger (91) is momentarily sucked and the main trigger lever moves the cam gear (72) from the second toothless portion to the first toothless portion to the gear (74).
The cam gear (7
The reset projection (89) of 2) contacts the reset projection (128) of the lock lever (125), and the lock lever (125)
Is rotated clockwise to return the drive slide (120) to the stop position.

(G) Effect of the Invention Since the tape recorder of the present invention is configured as described above, a timing chart for selecting or simultaneously operating the first and second cassette mechanisms according to a desired operation mode of a single plunger. It is possible to accurately execute the suction operation according to the above and rotation of a single cam gear, and it is possible to simplify the structure of this kind of double cassette mechanism, especially the structure of the plunger and the cam gear, to the minimum. It is extremely useful as a logic control type double cassette tape recorder.

[Brief description of drawings]

FIG. 1 shows an embodiment of the tape recorder of the present invention. FIG. 1 is a plan view of a chassis in a stopped state as seen from above, FIG. 2 is a plan view of the chassis in a stopped state as seen from below, and FIG. 3 is a mode. 4A and 4B are plan views of the switching portion, FIG. 4A and FIG. 4B are plan views of the cam gear seen from one side and the other side, and FIG. 5 is a plan view with the cam gear of FIG. 3 removed. Is a front view of the head and pinch roller portion in the A-side (forward direction) reproducing state, FIG. 7 is a front view of the head and pinch roller portion in the B-side (reverse direction) reproducing state, and FIG. 8 is the plunger suction and motor. A timing chart showing the timing of rotation, Fig. 9 is a plan view of the plunger suction state seen from the top of the chassis,
FIG. 10 is a plan view of the plunger suction state as seen from the bottom surface of the chassis, and FIGS. 11 (A), (Aa), (B), (Bb), (C), and (Cc) are parts of the mechanism for selecting the first and second mechanisms. Plan view,
12 (A), (B), (C), (D), (E), and (F) are plan views of different states for demonstrating the rotation of the cam gear and the mode selection timing. (1) ... mechanism chassis, (2) (3) ... head support plate, (4) (5) ... rotary head device, (32)
(33) (34) (35) …… flywheel, (36) …… motor, (39) (40) (41) (42) …… gear part, (43)
(44) (45) (46) …… Regeneration winding relay gear, (57)
(58) (59) (60) …… Take-up reel gear (64) (65)…
High speed gear, (66) (67) High speed drive lever, (72)
...... Single cam gear, (73) ...... First missing tooth part, (74) ...
… Flywheel gear, (76) …… Second missing tooth,
(78) …… First concave cam part, (79) …… Branch part, (82)…
… Second concave cam part, (84) …… Branching part, (87) …… Concave cam part, (88) …… Convex cam part, (89) …… Reset projection, (90) …… Main trigger Lever, (91) ... Plunger, (92) ... Sub-trigger lever, (100) ... Head switching slide, (101) ... Follow-up pin, (110) ... Engaging bent piece, (113) ... … Rewind switching slide, (114) ……
Follow-up pin, (120) …… Drive slide, (122) …… Following bent part, (123) …… Selection slide, (125) …… Lock lever.

Claims (3)

[Claims] 1. A tape recorder equipped with a first cassette mechanism having an A-side reproduction function, a B-side reproduction function, and a high-speed winding function, and a second cassette mechanism having the same functions, a. Mechanism selecting means for operating one or both of them, b.
Head channel switching means for simultaneously switching to the surface, c. Winding direction selecting means for switching each reproduction winding system of each mechanism to the A surface or B surface, and d. A reproduction winding system or high speed of each mechanism. A winding system operation selecting means for selecting an operation of the winding system, and e. An operation command for selecting or simultaneously operating the first and second cassette mechanisms, and suction of the plunger in response to a reproduction or high-speed winding mode command. A tape recorder comprising: a single cam gear, which is controlled by the operation timing and the rotational force of the motor to operate each of the means. 2. The tape recorder according to claim 1, wherein the cam gear is arranged substantially at the center of the first cassette mechanism and the second cassette mechanism. 3. A tape recorder comprising a first cassette mechanism having an A-side reproduction function, a B-side reproduction function, and a high-speed winding function, and a second cassette mechanism having the same functions, a. Mechanism selecting means for operating one or both of them, b.
Head channel switching means for simultaneously switching to the surface, c. Winding direction selecting means for switching each reproduction winding system of each mechanism to the A surface or B surface, and d. A reproduction winding system or high speed of each mechanism. A winding system operation selecting means for selecting an operation of the winding system, and e. An operation command for selecting or simultaneously operating the first and second cassette mechanisms, and suction of the plunger in response to a reproduction or high-speed winding mode command. A single cam gear that is controlled by the operation timing and the rotational force of the motor to operate each of the above means, and f. Is displaced in response to a predetermined rotation of the cam gear and moves the head support plate of each mechanism toward the stop position. And a drive unit for moving the mechanism, wherein the mechanism selection unit is an ON / O unit according to the operation command.
It is provided so as to be displaced to two different positions on the drive means by the plungers that perform suction operation in different time widths of FF,
A tape recorder characterized in that the drive means operates the head supporting plate of the first cassette mechanism or the second cassette mechanism in response to the position of the mechanism selecting means.