JPS6040103B2 - Mode switching device for magnetic recording and playback equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises: a plurality of operating levers arranged in parallel and each locked at an operating position; a main plunger which is energized when each of the operating levers is operated; a plurality of mode control levers that are linked to the operation of the operating lever and are respectively activated by the main plunger at each operation;
The present invention relates to a feather touch type mode switching device in which the main plunger is used to switch various modes such as recording and playback when each of the operating levers is operated.

That is, the present invention provides a mode switching device for such a magnetic recorder/player by newly providing an auxiliary plunger drive circuit, a cassette ejecting mechanism, and various switches related to these, so that at least one of the plurality of operation levers can be switched. It is possible to simulate a direct twill cut from one mode position where one of the main plungers is operated and the main plunger is in a driving state to another mode position, and also to prevent timing deviations in the operation of the main plunger or the auxiliary plunger. This prevents the user from falling into a state in which the control lever cannot be operated or locked, and can be operated accurately and safely at all times. Furthermore, the cassette can be ejected directly from a certain mode position without damaging the cassette, magnetic head, pinch roller, etc.

la to le in the figure are recording, playback, rewind, fast forward,
They are push button levers for stopping, etc., and have engaging pieces la' to le', respectively.
and a mounting bracket 2' attached to the chassis 2.
A support 2'' is mounted so as to be rotatable in the direction of arrow A, and each is biased to a non-rotating operating position by a spring (not shown).

3a to 3e are abutment pieces 4a to 3e that come into contact with engagement pins to be described later.
4e, and lock pieces 5a to 5e, respectively, which are locked by a lock lever to be described later.As shown in FIG. The fittings 7 and 8 are slidably inserted into respective through holes (not shown) provided in the fittings 7 and 8, respectively.

The operating levers 3a to 3e have through holes 9a to 9e, respectively, into which the corresponding pieces la' to le' of the push button levers are fitted with iron. The tanks are moved in the direction of arrow B, respectively. Reference numeral 10 denotes a lock lever slidably provided in the mounting bracket 8 through a through hole (not shown), and the lock piece 5 of each operating lever is
It has copper parts 11a to 11d for locking the springs a to 5d, respectively, and the spring 1 is always moved in the direction of arrow C as shown in FIG.
It is energized by 2.

Reference numeral 13 denotes a malfunction prevention lever that is slidably provided in the mounting bracket 8 through a through hole (not shown) in a state substantially parallel to the lock plate 10, and is always biased in the direction of arrow C by a spring 14. The malfunction prevention lever 13 is provided with inclined portions 15a to 15c at positions corresponding to the respective lock pieces 5b to 5d of the operation levers 3b to 3d, and the lock pieces 5a of the recording operation lever 3a are provided with inclined portions 15a to 15c. Correspondingly, a notch catch 16 is provided.

Therefore, when any one of the push-button bars lb-ld is rotated in the direction of arrow A, any one of the operation levers 3b-3d corresponding to the push-button lever is slid in the direction of arrow B, and The lock lever 1 is locked in a state in which one of the lock pieces 5b to 5d is brought into contact with one of the corresponding sloped portions 15a to 15c, and the malfunction prevention lever 13 is slid in the direction opposite to arrow C. Therefore, the malfunction prevention lever 1
The locking portion 16 provided on the operating lever 3a corresponds to the recording push button lever la. The pusher O lever lb enters the movement path of the hook piece 5a and is used for rewinding, fast forwarding, etc.
When operating lc and ld, the recording press bar la cannot be rotated. That is, the malfunction prevention lever 13 is designed so that when any of the push button levers lb to ld is rotated, the recording push button lever la cannot be pressed unless these push button levers lb to ld are unlocked for one day. I have to.

As mentioned above, 17 is a main switch that is closed when the various operation levers 3b to 3d are operated in the direction of arrow B, and is mounted on the mounting bracket 18. It is closed by the upright piece 19 of the malfunction prevention lever 13 that slides in the direction opposite to the arrow C as each of the levers is operated. Reference numeral 20 denotes a main plunger that is energized when the main switch 17 is closed, and its operating punch 21 connects one end of a rotating lever 23 whose center portion is rotatably supported on the base plate 6 via a shaft 24. When the plunger 20 performs a suction operation, the rotary lever 23 is rotated in the direction of the rebound indicator.

Reference numeral 25 denotes a control lever that is always biased in the direction of arrow C by a spring 26 that is freely attached to the mounting bracket 7, and the control lever 25 has a shaft that is attached to the other end of the rotating lever 23. 27 has an iron inlet hole 28 drilled therein, so that when the plunger 20 is in suction operation, it slides in the direction of arrow C against the biasing force of the spring 26 due to the rotation operation of the rotation lever 23. I am forced to do it. Further, the control lever 25 is provided with a plurality of engagement holes 29a to 29d into which a plurality of engagement pins, which will be described later, enter and exit, respectively. 30a to 30d are each push button lever l as shown in FIG.
The ball supports 3 are rotatably attached to the mounting brackets 7 corresponding to a to ld.
The mode sliding levers 1a to 31d are rotated clockwise by springs 32a to 32d, respectively. One end of the mode cutting bar 30a to 30d has a plurality of holes each having one end facing the supporting pieces 4a to 4d of each of the operating levers, and the other end facing the control lever engagement holes 29a to 29d, respectively. Engagement pins 33a to 33d are provided so as to be freely removable and removable via cylinders 34a to 34d, and a plurality of springs 35a to 35d are provided as shown in FIG.
The engagement pins 33a to 33d are inserted into the engagement holes 29a to 29, respectively.
From 9d onwards, it is always backed up in the direction of leaving. At the ends of the mode switching levers 30a to 30d, there are operating levers 39 to 41 for playback, rewind, fast forward, etc., which are freely provided on the chassis 2 and biased in the direction of arrow D by springs 36 to 38, respectively. The protruding shafts 42 to 4 that are in contact with the
4 is provided.

Accordingly, each of the operating levers 39-41 is slid in the counter-arrow direction by rotating the mode switching levers 30a-30d counterclockwise.

Reference numerals 45 and 46 are a supply reel stand and a take-up reel stand provided on the chassis 2. The mode switching device configured as described above further includes an auxiliary plunger 47, a selection switch 48 that configures a drive circuit for the main plunger 20 or a drive circuit for the auxiliary plunger 47 through the main switch 17, and A control switch 49 that closes the drive circuit of the auxiliary plunger 47 in response to the drive of the plunger 20, and a drive waiting state of the drive circuit of the main plunger 20 are always connected between the main switch 17 and the selection switch 48. A second selection switch, which will be described later, is incorporated so as to switch to the drive circuit side of the auxiliary plunger 47 when the operating lever for cassette ejection is operated.

That is, the auxiliary plunger 47 is mounted on the base plate 6, and its operating punch 50 is attached to one end of a rotary lever 52, whose central portion is rotatably supported on the base plate 6 by a ball 51, via a shaft 53. When the auxiliary plunger 47 performs a suction operation, the rotary lever 52 is rotated clockwise. Therefore, the lock lever 10 is provided with a side hole 55 into which iron is inserted into the shaft 54 which is shielded at the other end of the rotary lever 52.
is slid in the opposite direction of arrow C against the biasing force of the spring 12 during the suction operation of the auxiliary plunger 47, thereby unlocking each of the operating levers 3a to 3d. The selection switch 48 is mounted on the mounting bracket 66, and is connected to the main plan by the upright piece 57 of the lock lever 10, which is slid in the direction of arrow C in accordance with the sliding operation of each of the operating levers 3a to 3e. It is configured to instantaneously release the drive circuit of the plunger 20 and switch to the drive circuit side of the auxiliary plunger 47, and normally the drive circuit of the main plunger 20 is in the drive standby state as shown in FIG. be. Further, the control switch 49 is mounted on a mounting bracket 58 disposed near the rotary lever 23, and when the main plunger 20 is driven, a shaft 27 provided at the other end of the rotary lever 23 is used. It is configured to close the drive circuit of the auxiliary plunger 47. The mode switching device also incorporates a cassette ejecting mechanism as shown in FIGS. 9 to 11, and a cassette ejecting push button lever 60 having an operating piece 59 is rotated on the front mounting bracket 2'. They are rotatably supported on a shaft 2'' and urged to a non-rotating operating position (in the opposite direction of arrow A) by a return spring (not shown).

Reference numeral 61 denotes a cassette holder having an arcuate leg portion 63 having an engagement hole 62, and the cassette holder 61 is rotatably supported 2'' on the mounting bracket 2'.
The cassette 64 moves between two positions from the false ejection position to the installed position, and is always rotationally biased to the ejection position of the cassette 64 by the release spring 65. Reference numeral 66 denotes an operating lever provided with an engaging pin 67 that engages with the engaging hole 62 of the cassette holder leg 63 to hold the cassette holder 61 in the cassette mounting position. 2 is slidably provided on the lower surface of the cassette and is always biased in the direction of arrow EOD by a spring 68. As shown in FIGS. direction), it is slid in the opposite direction of arrow D via its actuating piece 59. and 69 is chassis 2
A second selection switch is attached to the mounting bracket 70 provided on the lower surface, and the second selection switch 69 slides in the opposite direction of arrow D as the push button lever 60 for ejecting the cassette is rotated. The upright piece 71 of the operating lever 66 that is moved
The drive circuit of the main plunger 20 is released and the drive circuit of the auxiliary plunger is switched to the drive circuit side of the auxiliary plunger.
The drive circuit is in a drive standby state. Therefore, the device of the present invention having such a configuration is wired as shown in FIG. 12, and its circuit connection is made as shown in FIG. One end of the plunger 47 is connected to the (10) terminal side of the power supply, and the other ends of the plungers 20 and 47 are connected to fixed contacts NC and NO of a selection switch 48, respectively, and a movable contact of the selection switch 48. On the C side, one fixed contact NO is connected to the other fixed contact NC of a second selection switch 69 connected to the other end of the auxiliary plunger 47, and the movable contact C of the second selection switch 69 The other side is connected to the (1) terminal side of the power source via the main switch 17.

Next, the mode switching operation of the apparatus of the present invention will be described in detail.

First, in the stopped state, as shown in FIG. 1, FIG. 2, and FIG. The operation levers 3a to 3d, which are linked to the role levers la to ld, respectively, are also in their pre-operation positions.

Therefore, the engagement pins 33a to 33d facing the supporting pieces 4a to 4d of each operating lever are connected to the springs 35a to 35d.
As a result, the control levers are separated from the engagement holes 29a to 29d, respectively, and the malfunction prevention lever 13 is also energized to the non-sliding state along with the lock lever 10 (FIG. 7a).
The main plunger 20 is also in an inoperative state due to the opening of the main switch 17, and the control switch 49 is also opened.

As shown in FIG. 13, the selection switches 48 and 69 are located on the fixed contacts NC and NC side of the main plunger 20, and are in a waiting state for driving the main plunger 20, and the auxiliary plunger 47 is It is inactive. Next, from this stopped state, when the regeneration push button lever lb is rotated in the direction of arrow A against the biasing force of a spring (not shown),
As shown in FIGS. 4, 5 and 6, the engaging piece lb'
The operating lever 3b, which is moved via the arrow B, is operated in the direction of arrow B.

Therefore, the lock lever 10 and the malfunction prevention lever 13 are operated by the springs 12 and 1, respectively, by the lock piece 5b of the operating lever.
At the same time, the engagement pin 33b of the mode switching lever corresponding to the operating lever 3b is also slid against the biasing force of the spring 35b due to its supporting piece 4b. Engagement hole 29b of corresponding control lever 25
After the engaging pin 33b is inserted, the locking piece 5b engages with the fishing part 11b and the operating lever 3b is locked. At this time, the lock lever 1 river trowel selection switch 48, which is instantaneously slid back and forth, is connected to the main plunger 2.
0 is instantaneously released and the auxiliary plunger 47 is switched to the drive circuit side (fixed contact NO side), and then the main switch 17 is closed by the malfunction prevention lever 13, but the control switch 49 is opened. Therefore, the main plunger 47 is not energized, and therefore the lock lever 10 which is interlocked with the auxiliary plunger 47 during regeneration operation from a stopped state.
This eliminates the risk of the lock being forcibly moved to the unlocked position (in the opposite direction of arrow C) and becoming unable to be locked.

And the lock lever 10 by locking the operation lever 3b
With the return of the selection switch 48, the fixed contact N
The main plunger 20 returns to the C side and becomes energized via the main switch 17. Therefore, as the rotary lever 23 is rotated counterclockwise due to the suction action of the plunger 20, the control lever 25 is caused to slide in the direction of arrow C against the biasing force of the spring 26. Therefore, the regeneration mode switching lever 30b, which is linked to the control lever 25 through the engagement pin 33b and the engagement hole 29b, is rotated counterclockwise against the biasing force of the spring 32b.

At this time, the protruding shaft 42 provided at one end of the mode switching lever 30b strongly kicks up one end of the regeneration operating lever 39, so that the operating lever 39 is moved by the spring 36.
The reproducing mode switching mechanism (not shown) is mechanically switched to a predetermined reproducing state by sliding it in the opposite direction of arrow D against the applied force of . Incidentally, when the main plunger 20 is driven, the control switch 49 is closed by the rotary lever 23, and the main plunger 47 is brought into a driving standby state.

At this time, the lock lever 10 and the malfunction prevention lever 13
The state is changed from the state shown in FIG. 7a to the operating state shown in FIG. 5b in the opposite direction of arrow C, so that the locking part 16 provided on the inclined part 15a of the malfunction prevention lever enters into the movement passage of the locking piece 5a of the recording operation lever, and the recording operation lever is slid in the opposite direction of arrow C. The push nail lever la is configured so that it cannot be pushed.

In addition, in such a regenerated state, the engagement hole 29 is closed as shown in FIG. 8a.
The control lever 25, into which the engagement pin 33b of the regeneration mode cutting lever is inserted in FIG. The matching holes 29a, 29c, and 29d are slid to positions (in the direction of arrow C) that are shifted from the engaging pins 33a, 33c, and 33d of the other mode switching levers, and purely mechanically, they cannot be moved through a stop operation. It is now impossible to directly switch to another mode without doing so. Next, a description will be given of a direct switching operation from one mode position to another mode position in which at least one of the operating levers is operated and the main plunger is in a driven state.

That is, if, for example, the rewind push lever 0 lever lc is rotated in the direction of arrow A against the biasing force of a spring (not shown) from the playback state as shown in FIGS. 4, 5, and 6, , an operating lever 3c that is moved via its engagement piece lc'.
is slid in the direction of arrow B.

Therefore, the lock lever 10 is slid in the opposite direction of arrow C by the lock piece 5c of the operating lever against the biasing force of the spring 12, and the engaging pin 33c of the mode sliding lever corresponding to the operating lever 3c is also slid into position. The control lever 25 responds by resisting the biasing force of the spring 35c by the reinforcement piece 4c.
Therefore, until the engaging pin 33c comes into contact with the control lever 25, the selection switch 4 is operated by the upright piece 57 of the lock lever.
8 is switched from the instantaneous fixed contact NC side to the Nc side, and the control switch 49 is closed to close the drive circuit of the auxiliary plunger 47 which is in the driving state. As a result, the main switch 17 is closed by the upright piece 19 of the malfunction prevention lever 13 that is slid in the direction of arrow C.
Through this, the auxiliary plunger 47 is in a driven state, and the suction action of the auxiliary plunger 47 causes the rotation lever 52 to move.
When the lock lever 1 is rotated clockwise, the lock lever 1
The regeneration operation lever 3 is caused to slide in the direction opposite to the arrow C against the biasing force of the spring 12.
b is unlocked by its lock piece 5b, and as the malfunction prevention lever 13 returns (in the direction of arrow C) due to the release, its upright piece 19 is separated from the main switch 17, and the main switch 17 Release the auxiliary plunger 4 again.
7 is rendered inoperative. Note that the main plunger 20 is already in the non-driven state when the selection switch 48 is switched to the auxiliary plunger 47 side, and therefore the control lever 25 is returned to the action in the opposite direction of arrow C by the biasing force of the spring 26. However, the mode switching lever 30b for reproduction, which is linked to the control lever 25 through the engagement pin 33b and the engagement hole 29b, is rotated back clockwise by the biasing force of the spring 32b, and the mode switching lever The operating lever 39, which is strongly pushed up in the opposite direction of the arrow ◯ by the protruding shaft 42 provided at one end of the lever 30b, returns the operating lever 39 which mechanically switches the regeneration mode switching mechanism to a predetermined regeneration state. Therefore, when the rewinding operation lever 3c is operated from the rewinding state via the rewinding press lever lc, the corresponding mode is detected until the engagement pin 33c of the bar 30c comes into contact with the control lever 25. As the lock lever 10 slides due to operation, the selection switch 48 momentarily switches to the control switch 4.
9, the auxiliary plunger 47 is activated and the main plunger 20 becomes inactive, and the operating lever 3b is activated. At the same time as the lock is released, the main switch 17 is opened by the malfunction prevention lever 13, and the engagement holes 29a, 29c of the control lever are opened.
, 29d are engagement pins 33a, 33c, 3 of each operating lever.
3d, the rewind gate push button lever la can be further rotated without the engaging pin 33c coming into contact with the control lever 25 and becoming inoperable. After that, the operation lever 40 for rewinding operates in the same manner as the reproducing operation from the stopped state described above.
is slid in the direction opposite to arrow D, and a predetermined rewinding state is achieved by mechanically switching a rewinding mode switching mechanism (not shown).

Note that when the selection switch 48 is switched to the auxiliary plunger 47 side from the driving state of the main plunger 20, the control switch 4
9 is configured to be opened, but the control switch 49 is not opened unless the auxiliary plunger 47 is activated, and is always opened after the auxiliary plunger 47 is momentarily activated. It is electrically or mechanically adjusted.

Next, when at least one of the operating levers is operated and the cassette is ejected directly from a certain mode position where the main plunger is in the driven state (i.e., as shown in FIGS. 4, 5, and 6), The following describes the case where the cassette is directly ejected from the playback state as shown in FIG.

First, in such a reproducing state, as shown in FIG.
The cassette 64 is held at a predetermined mounting position by the engagement relationship with the engagement pin 67, and from this state, when the cassette ejecting blunt bar 60 is rotated in the direction of arrow A as shown in FIG. , along with the rotational operation, the actuating lever 66
is slid in the opposite direction of the arrow ◯ through the actuating piece 59, but the engaging pin 67 is inserted into the engaging hole 62 of the leg of the cassette holder.
The cassette holder 61 is held at the mounting position of the cassette 64 while the cassette holder 61 is slid by the length of .

Therefore, while the engagement pin 67 of the actuation lever slides along with the actuation lever 66 by the length of the engagement hole 62 in the opposite direction of arrow D, the upright piece 71 of the actuation lever 66 The second selection switch 69 is switched from the fixed contact NC side to the NO side, and the opening of the control switch 49 opens the drive circuit for the auxiliary plunger 47 which is in a drive standby state.

As a result, the malfunction prevention lever 13 is slid in the opposite direction of the arrow ◯, similar to when rewinding from the playback state described above.
The main switch 1 is closed by the upright piece 19 of
7, the auxiliary plunger 47 is in the driving state, and the rotation lever 5 is rotated by the suction operation of the auxiliary plunger 47.
2 is rotated clockwise, the lock lever 10 is slid in the opposite direction of arrow C against the biasing force of the spring 12, so that the regeneration operating lever 3b
When the lock piece 5b is unlocked and the malfunction prevention lever 13 returns to its original position (in the direction of arrow C), the upright piece 19 separates from the main switch 17 and closes the main switch 17. Release the auxiliary plunger 4 again.
7 is rendered inoperative. Note that the main plunger 20 is already in the non-driven state when the second selection switch 69 is switched to the auxiliary plunger 47 side, and therefore the control lever 25 is moved in the opposite direction of arrow C by the biasing force of the spring 26. The control lever 25 and the engagement pin 33
The mode switching bar 30b for reproduction, which is connected to the mode switching lever 30b through the engagement hole 29b, rotates back clockwise due to the biasing force of the spring 32b, and the protruding shaft provided at one end of the mode switching lever 30b At 42, the actuating lever 39, which has been strongly pushed up in the opposite direction of the arrow ◯ to mechanically switch the regeneration mode switching mechanism and bring it into a predetermined regeneration state, is returned to its original position.

Therefore, when the push-button lever 60 is rotated in the direction of arrow A to eject the cassette 64 from the playback state without using the stop push-down bar le, the rotating operation is performed as shown in FIG. The cassette holder 61 is unlocked after the second selection switch 69, which is simultaneously operated, releases the re-released state (i.e., the engagement relationship between the engagement pin 67 of the operating lever and the engagement hole 62 is changed). The cassette holder 61 opens the cassette 64 by the urging force of the release spring 65 while holding the engagement pin 67 at a position slid in the direction of the arrow ○ on the circumference of the arcuate leg 63. Move to ejection position. Therefore, the second selection switch 69
The cassette holder 61 reaches the cassette 64 ejecting position (FIG. 11) while the cassette holder 61 is held in a position where the fixed contact is switched from the NC side to the NO side via the upright piece 71 of the operating lever. Therefore, when the cassette 64 is ejected with the cassette holder 61 opened as shown in FIG.
In order to perform operations such as playback, press the lever l.
Even if a to lb are rotated, the second selection switch 6
Since the fixed contact 9 is held in a simulated state from the NC side to the NO side (that is, because the drive circuit of the main plunger 20 is not in the special state), each pusher lever la to ld This prevents the cassette 64 from being installed in a state where the magnetic head and the like are advanced into the cassette housing recess. Further, when the cassette holder 61 is rotated from the ejected state of the cassette 64 to the mounting position of the cassette 64 against the biasing force of the release spring 65 as shown in FIG. maintains an engagement relationship with the engagement hole 62 when the predetermined mounting position is reached;
Only when the second selection switch 69 is operated to switch from the fixed contact Nq side to the NC side, each pusher 0 lever la
It enters a standby state for various operations in which operations corresponding to ~ld can be performed.

Further, when the stop lever le is rotated in the direction of arrow A to stop the tape recorder from the playback state, the stop operation lever 3e is slid in the direction of arrow B, and the lock piece 5e is activated to lock the lever. 10 in the lock release direction (counter-arrow C direction) to lock the lock piece 5b of the operating lever for regeneration by the hook portion 11b mechanically or electrically by the auxiliary plunger 47 activated by a selection switch. At the same time, as the malfunction prevention lever 13 returns (in the direction of arrow C), the upright piece 1
9 is separated from the main switch 17, and the main switch 17 is opened. Therefore, at the same time as the lock is released, the main plunger 20
becomes inoperative, and as the regeneration operating lever 3b is reset by the spring 35b (in the opposite direction of arrow B), the engagement pin 33b is also disengaged from the engagement hole 29b, and the control lever 25 and the mode switching lever 30b are removed. are also returned to their non-operating states, resulting in a predetermined stopped state.

As described above, the playback operation of the device of the present invention, rewinding from the playback state,
Although the ejection and stop states of the cassette have been described, the same applies to each fast-forward operation.

As described above, according to the device of the present invention, there are a plurality of operating levers arranged in parallel and each locked at the operating position, a main plunger that is energized when each of the operating levers is operated, and It has a plurality of mode test bars that are linked to the operation of each operating lever and are activated by the main plunger at each operation, and the main plan is to switch various modes such as recording and playback when operating each operating lever. In the feather touch type mode switching device that is designed to operate on the plunger, a drive circuit for the auxiliary plunger, a cassette ejecting mechanism, a control switch related to these, a main switch, a selection switch, and a second selection switch are newly added. By providing a main switch and the like, at least one of the plurality of operating levers is operated to easily and accurately switch from one mode position in which the main plunger is in a driving state to another mode position. In addition to making it operable,
This eliminates dust that would cause the operation lever to become inoperable or unlockable due to a timing shift in the operation of the main plunger or the auxiliary plunger, allowing accurate and safe operation at all times.

Furthermore, it is possible to directly eject the cassette from a certain mode position without damaging the cassette, magnetic head, pinch roller, etc., and in the ejecting state of the cassette, the operation corresponding to each push-down bar is made. This is of great industrial value, since it is possible to eliminate the problem of the cassette being inserted while the magnetic head or the like is being advanced into the cassette storage recess.

[Brief explanation of drawings]

The figures show the device of the present invention, FIG. 1 is a schematic plan view showing its stopped state, FIG. 2 is a schematic plan view thereof, FIG. 3 is a schematic side view thereof, and FIG. 4 is a schematic front view showing its reproducing state. Figure, 5th
The figure is a schematic plan view, FIG. 6 is a schematic side view, and FIGS. 7a and 7b are diagrams showing the operational relationship between the lock lever and the malfunction prevention lever, respectively, where a shows the stopped state and b shows the regenerating state. Figures 8a and 8b are diagrams showing different states, respectively, showing the positional relationship between the mode selection bar and the control lever, and Figures 9 to 11 are different schematic side views showing the cassette ejection operation states. 12 is a schematic wiring diagram thereof, and FIG. 13 is a schematic circuit diagram thereof. la~le...Push spade lever, 3a~3e...
...Operation lever, 4a-4e...Abutting piece, 5a-
5e...Lock piece, 10...Lock lever, 13...
...Malfunction prevention lever, 17...Main switch, 19.
...Rise piece, 20...Main plunger, 25
......Control lever, 29a-29d...Engagement hole,
30a to 30d...Mode switching lever, 33a
~33d...Engagement pin, 35a~35d...
・Spring, 47...Auxiliary plunger, 4
8...Selection switch, 49...Control switch, 57
......Rise piece, 60...Push button lever, 6
1...Cassette holder, 64... ...Cassette, 66...Operating lever, 69...
Second selection switch, 71... Standing piece. Younger brother, Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13

Claims (1)

[Claims] 1. A plurality of operating levers arranged in parallel and each locked in an operating position, a main plunger that is energized when each of the operating levers is operated, and a main plunger that is linked to the operation of each of the operating levers and that is energized at the time of each operation. In a mode switching device equipped with a plurality of mode switching levers each operated by a main plunger, the main switch is closed when each of the operating levers is operated, and the main plunger drive circuit or the auxiliary plunger is controlled through the main switch. A selection switch constituting the drive circuit, a control switch that closes the auxiliary plunger drive circuit in response to the drive of the main plunger, and a drive standby switch for the main plunger drive circuit between the main switch and the selection switch. and a second selection switch configured to switch to the auxiliary plunger drive circuit side when the discharge operating means is operated, and the selection switch is always in the drive standby state of the main plunger drive circuit. The main plunger drive circuit is configured to instantaneously release the main plunger drive circuit and switch to the auxiliary plunger drive circuit when any of the operating levers is operated, so that when any of the operating levers is operated, the main plunger is in the driven state. In a certain mode position, when the control switch is closed, the auxiliary plunger is ready to be driven, and then when another operating lever is operated, the auxiliary plunger is instantaneously driven by the instantaneous switching operation of the selection switch. , the operating lever operated first by the auxiliary plunger is unlocked, and then the operating lever is switched to another mode position by the main plunger, and the operating means for discharging is operated from a certain mode position. A mode switching device for a magnetic recording/playback machine, in which an auxiliary plunger is instantaneously driven by a switching operation of a second selection switch, and its mode position is released to enable a cassette ejection operation.