JPS6021417B2 - Recording/playback device mode selection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mode selection device most suitable for application to, for example, tape recorders, VTRs, and other recording and reproducing devices.

Conventionally, there is a mode switching device commonly known as the feather touch method, which operates a plunger solenoid and switches the desired mode by simply touching the feather touch push pin or mode selection switch with your fingertip. Many have been invented.

By the way, in most conventional devices of this type, the suction force of the plunger solenoid itself is used as the force for mode switching, and this has the drawback of requiring a large capacity plunger solenoid. had.

The present invention was invented in view of the above-mentioned circumstances, and is configured so that the mode to be switched is selected by the operation of the plunger solenoid. The purpose of this invention is to provide a plunger solenoid that can be made ultra-miniaturized by eliminating the need for a plunger solenoid.

An embodiment in which the present invention is applied to a tape recorder will be described below with reference to the drawings.

First, before explaining the configuration, in this embodiment, playback,
Each mode of recording, fast forward, rewind, and stop can be set to FW.
They are written as D, REC, FF, REW, and STOP.

In addition, an upper chassis and a lower chassis are used for the bag, and a tape running drive system such as a capstan, a pair of reel stands, an idler, and a drive motor is attached to the upper chassis.
A mode switching plate described in this embodiment is attached to the lower chassis. In order to make the drawings easier to read, the upper chassis and lower chassis have been removed from the drawings. In addition, this tape recorder has FWD, REC, FF, RE
For example, five mode changeover switches (not shown) of a feather touch type or a touch type are used to change over the five modes W and STOP, and by selectively turning on these mode changeover switches, the above five modes can be changed. It is configured such that two modes can be selectively switched. Next, the configuration of the mode switching diamond attached to the lower chassis will be explained with reference to FIGS. 1 to 3.

First, numerals 1, 2, and 3 are plunger solenoids (hereinafter simply referred to as plungers). These plungers 1, 2, and 3 are energized in a predetermined combination by selectively turning on the five mode changeover switches, and this causes the suction operation, that is, the suction rods la, 2a. , 3a are these rear springs lb
, 2b, 3b and is attracted by magnetic attraction force. 5 is a capstan, which is configured to be rotationally driven by the drive motor (not shown).

It is configured such that when the mode selector switch (excluding the STOP switch) is selectively pressed, power is supplied, thereby the motor starts rotating and the capstan starts driving. . Further, a drive gear 6 is fixed to the capstan 5. 8 is a cam gear arranged on one side of the above-mentioned disturbance gear 6;
This cam gear 8 has a rotating cam 9 integrally formed on its upper surface and a pair of pins 10a and I0b on its lower surface.

Also, this cam gear 8 has two notches 1 on its circumferential surface.
1a and 11b are formed. Note that the pin 10a.
10b and the notches 11a, 11b are provided symmetrically and perpendicularly with respect to the rotating shaft 12 of the cam gear 8.
Reference numeral 13 denotes a conversion lever formed in a substantially L-shape, which is supported at substantially the center in the longitudinal direction by a fulcrum 14 so as to be freely rotatable.

This conversion lever 13 is biased clockwise in FIG. 1 by a spring 15, and the spring force causes one end of
3a is constantly pressed against the side surface of one end 9a of the rotating cam 9. 16 is a starting lever formed in a substantially L-shape;
The bent portion is rotatably supported by a fulcrum shaft 17.

A pair of arm portions 18a and 18b are integrally formed at one end 16a of the activation lever 16 and are bent into a substantially semicircular arc shape. Note that these pair of arm portions 18a and 18b are
Due to the swinging movement of the starting lever 16 about the fulcrum shaft 17, the pair of pins 10a are pushed together on the lower side of the cam gear 8.
, 10b are inserted alternately within the rotation locus of the rotation paths. Further, the tip of one arm portion 18b is formed into a hook shape. Also, this starting lever 16 is held by a spring 1.
9 in the counterclockwise direction in FIG.
On the other hand, the two plungers 1 and 2 are arranged in parallel and close to each other at the positions shown in the figure. A pair of protrusions 20, 21 are fixed to the tips of the suction rods la, 2a of both plungers 1, 2. Note that these protrusions 20 and 21 are arranged close to each other, and the other end 16b of the activation lever 16 is extended so as to contact both of these protrusions 20 and 21. Reference numerals 22 and 23 designate a pair of selection levers, which are substantially crank-shaped and arranged in parallel to each other.

Both selection levers 22 and 23 are configured to be slidable in the longitudinal direction by being guided by a hole and a guide inserted therein, and are moved downwardly in FIG. 1 by springs 24 and 25, respectively. It is energized. Further, elongated holes 26, 27 are formed in one ends 22a, 23a of both the selection levers 22, 23, and pins 28, 29 integrally formed on both the protrusions 20, 21 are inserted into the elongated holes 26, 23.
7, respectively. Note that both these pins 28
, 29 are inserted and guided into a pair of holes (not shown) provided in a chassis (not shown). Furthermore, protrusions 30 and 31 are integrally formed on one ends 22a and 23a of both selection levers 22 and 23, respectively. Also, a pair of projections 32, 33 are integrally formed on the other ends 22b, 23b of both selection levers 22, 23, and these are stacked one above the other. 35 is a detection lever;
The detection bar 35 is disposed above the selection levers 22 and 23 so as to be perpendicular to them.

The detection lever 35 is guided by an elongated hole and a guide inserted therein so as to be slidable in its longitudinal direction, and is biased to slide rightward in FIG. 1 by a spring 36. A pin 37 integrally formed with the end 13b of the conversion lever i3 is attached to one end 35a of the detection lever 35. Further, a sekiguchi 38 is formed at the other end 35b of this detection lever 35, and the sekiguchi 38
The inner surface of one side is a pin guide surface 39 bent into a dogleg shape.
is formed. Also, an example surface 3 of this detection lever 35
5c has both protrusions 30 and 3 of the selection levers 22 and 23.
1, a pair of convex portions 40, 41 and a pair of concave portions 4
2, 43 are formed. 45 is the drive gear 6
This is another cam gear disposed on the opposite side of the cam gear 8.

This cam gear 45 has an eccentric rotary cam 47 eccentric to the rotary shaft 46 on its upper surface, and a rotary shaft 46 on its lower surface.
A disk portion 48 having a size of d and concentric with each other is integrally molded. Note that a protrusion 49 is integrally formed on a part of the surface of the disc portion 48 . Also, this cam gear 45 has one part of its circumferential surface.
A notch 50 is formed at the location. On the other hand, the plunger 3 is arranged in the position shown in the figure, and a pin 51 fixed to the tip of the suction rod 3a is moved around the circumference of the disc portion 48 by the spring force of the spring 3b of the suction rod 3a. light contact with the surface.

Reference numeral 53 denotes a drive lever formed in a substantially L-shape, and its bent portion is supported by a fulcrum shaft 54 so as to be freely rotatable.

This turbulence lever 53 is biased counterclockwise in FIG. 1 by a spring 55, and one end 53a thereof is constantly pressed against the side surface of the eccentric rotating cam 47 of the cam gear 45 by the force of the spring. Note that a pin 56 is fixed to the lower surface of the approximately central portion of this drive lever 53, and this pin 56 is connected to both protrusions 32, 33 of both selection levers 22, 23.
As shown in Figure 1, they can be pushed up in common from the lower side. Reference numeral 58 denotes a mode selection bar, which is rotatably supported on the other end 53b of the drive lever 53 by a fulcrum shaft 59 at an approximately central portion thereof in the longitudinal direction.

A mode switching pin 60 is hammered into the upper surface of one end 58a of the mode cutting bar 58, and a pin 61 is hammered into the lower surface of the other end 58b. Note that this pin 61 is inserted into the opening 38 of the detection lever 35. A coiled spring 62 is wound around the three-point shaft 59, and both ends of the bracketed coiled spring 62 are connected to a drive lever 53 and a mode control bar 58.
is engaged with. The coil spring 62 biases the mode control bar 58 on the drive lever 53 counterclockwise in FIG. 1 about the point shaft 59. Note that the pin 61 is pressed against the pin guide surface 39 of the detection lever 35 due to this rotational bias. A locking bar 64 is rotatably supported by a fulcrum shaft 65, and biased to rotate clockwise in FIG. 1 by a spring 66.

A substantially triangular projection 67 is integrally formed on one side 64a of the lock lever 64. As shown in FIG. A pin 68 fixed to the lower surface of the end 53b of the drive lever 53 is configured to be able to engage with and disengage from the protrusion 67 of the lock lever 64. Further, the lock lever 64, which is rotatably energized as described above, is abutted against the end 35b of the detection lever 35 from the left side in FIG. 5 by its tip 64b. Reference numeral 71 denotes a green recutting bar, which is configured to be movable in the longitudinal direction while being guided by an elongated hole and a guide inserted therein.

The green re-switching lever 71' is biased downward in FIG. 2 by a spring 72. A green reselection lever 73 is rotatably supported on this coin reswitching lever 71 by a fulcrum shaft 74. This recording/reproduction selection lever 73 is connected to a spring 75 that is bridged between this and the green/reproduction selection lever 71.
It is rotated counterclockwise in FIG. 2 by . By rotating the green reselection lever 73 around the fulcrum bag 74, its one end 73a is configured to be able to move in and out of the movement locus of the pin 61 of the mode contact bar 58 as shown by the chain line in FIG. There is. In addition, a conversion lever 77 is pivotably supported at a central portion in the longitudinal direction by a fulcrum shaft 76 so as to be freely rotatable.
A groove 78 is formed at one end 77a of the groove. A pin 79 is integrally formed with the protrusion 20 of the plunger 1.
is engaged in the groove 78. A pin 80 is integrally formed on the lower surface of the other end 77b of the conversion lever 77, and the green reselection lever is biased to rotate counterclockwise in FIG. 2 about the fulcrum shaft 74. 73 is brought into contact with the pin 8 from the upper side in FIG. 2 by the other end 73b. Reference numeral 82 denotes a traverse re-switching switch for switching the recording circuit system and the reproducing circuit system between a recording state and a reproducing state.

The green re-switching switch 82 is configured to be switched by the green re-switching lever 71. That is, when the coin recutting bar 71 is moved upward as shown by the chain line in FIG. 2, the lever TI pushes up the super mover 83 of the switch 82 in the same direction, and this switch 82 records state. When the lever 71 is moved back as shown by the solid line in FIG. 2, the slider 83 is moved back downward in FIG. 2 by the spring 84, and the switch 82 is switched to the regeneration state. 86 is a FWD lever, 87 is an FF lever, and 88 is a REW lever.

And these three mode switching levers 86, 87,
68 are arranged under the upper chassis, which are arranged close to each other and parallel to each other. Note that these three levers 86
, 87 and 88 are each guided by a long hole and a guide inserted therein so as to be freely movable in the longitudinal direction. Note that the three levers 86, 87, and 88 are respectively linked to the FWD travel drive system, the FF travel drive system, and the REW travel drive system in the tape travel drive system provided on the upper chassis. and each of these three levers 86,8
7 and 88 are selectively slid upward in FIG.
WD, FF, and REW tape runs are performed. The three levers 86, 87, and 88 are configured to be moved back to the position shown in FIG. 1 by the back movement of each of the travel drive systems described above. The mode switching pin 60 mounted on one end 58a of the mode switching lever 58 is connected to one end 86a of the three levers 86, 87, 88. 87a,
It is inserted on the lower side in FIG. 1 of 88a.

The mode switching pin 60 selectively engages one ends 86a, 87a, 88a of these three levers 86, 87, 88 by a mode switching operation to be described later, and pushes them upward in FIG. 1. The configuration is such that desired mode switching is performed by this operation. Next, a mode switching operation in the mode switching device described above will be explained.

First, the main operations related to mode switching in this device will be explained with reference to FIG. A reciprocating motion of stroke S is always performed between the two.

At this time, the forward movement of the detection lever 35 in the direction of arrow a is performed by the cam gear 8 and conversion lever 13, which will be described later, against a spring 36, and the backward movement in the direction of arrow b is performed by the spring force of the spring 36. When the detection lever 35 is moved back from the forward position P2 in the direction of arrow b, the stop position of the detection lever 35 is selected by the pair of selection levers 22 and 23. By selecting the stop position of the detection lever 35, the mode switching pin 60 of the mode switching lever 58 is set to the FWD position A, the FF position B, and the REW position C. After this setting, the mode switching lever 58 is driven in the direction of arrow c using the drive lever 53, and the three levers 86, 87, 88 of the mode switching pin 60' iron FWD, FF, and REW are selectively driven. FWD, FF
``Switch each mode of REW.Switching of REC mode is done using the recording/playback switch 8 when switching to FWD mode.
This is achieved by switching 2 to the recording state. Further, the locking of each of the FW◯, REC, FF, and REW modes is achieved by locking the drive lever 53 in its forward position using the lock lever 64.

Furthermore, when switching from each of the FWD, REC, FF, and REW modes to the STOP mode, the detection lever 35 is reciprocated once again to release the lock lever 64 and release the drive lever. 53
This is achieved by moving back into a tataka position. By the way, the above-described stop position of the detection lever 35 is selected in the following manner.

First, if it is time to switch to FWD mode, detect bar 35.
When the selector lever 23 moves in the direction of arrow d from the backward movement position P, by a stroke S2 in the direction of arrow a, the selection lever 23 moves in the direction of arrow d,
The protrusion 31 is inserted into the concave portion 4 from above the convex portion 41 of the detection lever 35.
It falls within 3.

On the other hand, the detection lever 35 is once moved forward to the forward movement position P2, and then is moved back in the direction of arrow b. When the detection lever 35 reaches the position P3 indicated by the solid line, the convex portion 41
As a result, the detection lever 35 collides with the protrusion 31 of the selection lever 23, and the detection lever 35 is stopped at the position P3. In addition, when switching to the FF mode, when the detection lever 35 moves by a stroke S3 in the direction of the arrow a from the resting position P, the selection lever 22 moves in the direction of the arrow e, and the protrusion 30 of the detection lever 35 moves in the direction of the arrow e. It falls into the recess 42 from above the projection 40.

Then, as described above, the detection lever 35, which has once moved back to the forward movement position P2, is moved back in the direction of the arrow b, and the position P indicated by the one-dot chain line is detected.
4, the selection lever 22 is moved by the protrusion 40.
The bar 35 is stopped at the position P4. Further, when switching to the REW mode, the selection lever 22 is held at the position shown by the solid line, and the selection lever 23 is held at the position shown by the dotted line.

For this reason, the detection lever 35 is not stopped during the return sardine movement, and after reaching the forward sardine position P2 from the return movement position P, it is completely returned to the original return sardine position P. Therefore, the detection lever at this time
The stopping position of No. 35 is the resting position P. On the other hand, the mode cutting bar 58 is located on the drive lever 53 and is biased counterclockwise by a spring 62 around a shaft 59 at point 3A, and the pin 61 of the mode cutting bar 58 is placed on the drive lever 53 .
is constantly pressed against the pin guiding surface 39 of.

Therefore, in conjunction with the aforementioned one reciprocating movement of the detection lever 35, the mode cutting bar 58 also undergoes one reciprocating swing movement about the fulcrum shaft 59. Then, the detection lever 35 is at the stop position P.
3, the mode switching pin 60 of the mode switching lever 58 reaches the FWD position A and stops. Similarly, when the detection lever 35 is stopped at the stop position P4 or P, the mode switching pin 60 reaches the FF position B and the REW position C and stops, respectively. Next, the actual mode switching operation in this device will be explained with reference to FIGS. The operating conditions of jars 1, 2, and 3 are as follows. In the table above, ◎ and ◎ indicate that the plunger is energized and performs a suction operation.

1 indicates that the plunger is not energized. However, in the case of 0, the energization time to the plunger is, for example, 0.3 to 0. Everything is set, and in the case of ◎, the energization time to the plunger is set to, for example, 0.8 seconds or more. Therefore, the plunger 1 is operated for a long time only when switching to the REC mode, and due to the difference in the suction operation time of the plunger 1 during REC and FWD, the REC
and FWD are selected (identified). Also the plunger
3 is the mode switching mutual operation by the mode switching switch (
FWD, REC, FF, REW modes can be switched between each other without going through STOP), and the actual switching between the five modes of FWD, REC, FF, REW, and STOP is done using a plunger. The suction operation is performed by a combination of suction operations 1 and 2. Therefore, FIGS. 1 and 2 show the STOP mode, and each of the FWD, REC, FF, and /REW modes corresponds to this STOP mode.
It can be switched based on the TOP mode.

In this STOP mode, one cam gear 8 faces the drive gear 6 through one notch 11a, and the other cam gear 45 faces the drive gear 6 through a notch 50, and these cam gears 8, 45 are in a disengaged state with respect to the drive gear 6. is maintained. However, one of the cam gears 8 is biased to rotate clockwise in FIG.
is placed on the tip of one arm portion 18a of the activation lever 16, thereby preventing the above-mentioned rotation. The other cam gear 45 is rotated clockwise in FIG. The above rotation is prevented by this. [F
WD mode switching operation] This FWD mode switching operation is shown in FIGS. 5 to 7.

First, when the FWD mode selector switch is turned on, power is supplied and the outer iron capstan 5 is rotated counterclockwise in FIG. 5. At the same time, plungers 1 and 3 are energized at the same time (actually, plunger 3 is slightly delayed). When the plunger 1 is energized, its suction rod la is sucked upward as shown in FIG.

However, at this time, the pin 28 only moves within the elongated hole 26 of the selection lever 22 from its lower end position to its upper end position, and does not substantially pull up the selection lever 22.

Therefore, the selection lever 22 does not act as a suction load on the plunger 1. The suction action of the suction rod la causes the protrusion 20 to push up the end 16b of the activation lever 16, causing the activation lever 16 to rotate clockwise against the spring 19 as shown in FIG.

Then, one arm 18a of the activation lever 16 is removed from one pin 10a of the cam gear 8, and at the same time, the other arm 18b enters into the rotation locus of the pin 10a.
Then, at this moment, one of the cam gears 8 moves to the conversion lever 13.
It is pushed by and rotated slightly clockwise as shown in FIG. 5, and is engaged with the drive gear 6. Thereafter, the cam gear 8 is driven half a rotation clockwise in FIG. 5 by the drive gear 6. As the cam gear 8 rotates, the other end 9b of the rotating cam 9 pushes the one end 13a of the conversion lever 13.

As a result, the conversion lever 13 is rotated counterclockwise about the fulcrum shaft 14 against the spring 15 as shown by the chain line in FIG. Then, the pin 37 of the conversion lever 13 comes into contact with one end 35a of the detection lever 35, causing the detection lever 35 to slide to the left in FIG. 6 against the spring 36.
Then, as the rotating cam 9 rotates, the conversion lever 13 performs one reciprocating rocking motion, thereby causing the detection lever 35 to move to the fourth position.
It will undergo one reciprocating movement as explained in the figure. By the way, due to the suction of the plunger 1 mentioned above, the pin 28 is inserted into the elongated hole 2.
By moving to the upper end position of 6, one selection lever 22
is held in the position shown in FIG.

On the other hand, since the plunger 2 is not attracted, the other selection bar 23 is urged by the spring 25 to slide downward in FIG. In this state, when the detection lever 35 is moved forward by the stroke explained in FIG. 4, the convex portion 41 is removed to the left side of the protrusion 31 in FIG. 6. At that moment, the selection lever 23 is pushed downward in FIG. 6 by the spring 25, and the projection 31 enters into the recess 43 from above the projection 41. As a result, as explained in FIG. 4, when the detection lever 35 is moved back by the spring 36 after reaching the forward position P shown by the chain line in FIG. It is stopped at a stop position P3 shown by a solid line in FIG.

As a result, the mode switching pin 60 of the mode switching bar 58 is set to the FWD position A. Note that when the cam gear 8 rotates approximately half a rotation, the pair of notches 11a and 11b
Then, the drive gear 6 finishes driving the cam gear 8.

At this point, one pin 10a is received by the tip of the other arm 18b of the activation lever 16, and the cam gear 8 is stopped. By the way, after the cam gear 8 stops rotating, the plunger 1 is de-energized.

Then, the suction rod la is moved back by the spring lb as shown in FIG.
As shown in the figure, it is rolled counterclockwise and returned to its original position.
-Reru. As a result, as shown in FIG. 1, the other arm 18b of the activation lever 16 is removed from the pin 10a, and at the same time, the one arm 18a enters into the rotation locus of the pin 10b. At this moment, the cam gear 8 is slightly rotated clockwise by the conversion lever 13, and as shown in FIG. state and is stopped again. At this point, cam gear 8 has completed half a rotation.
The conversion lever 13 also completes one reciprocating rocking motion. On the other hand, when the plunger 3 is energized, its suction rod 3a is attracted to the left side as shown in FIG. 5, and its pin 51 is removed from the protrusion 49 of the other cam gear 45.

At this moment, the other cam gear 45 is driven and the bar 5
3 and rotated slightly clockwise as shown in FIG. 5, and this is engaged with the drive gear 6. Thereafter, the cam gear 45 is driven one rotation clockwise in FIG. 5 by the stirring gear 6. As the cam gear 45 rotates, the eccentric rotating cam 47 pushes the one end 53a of the drive lever 53, as shown in FIG.

This causes the drive lever 53 to move against the spring 55 and move the fulcrum shaft 5.
4 in the clockwise direction in FIG. At this time, after the cam gear 45 starts rotating, the eccentric rotating cam 4
7 until the drive lever 53 actually starts rotating clockwise, that is, until the eccentric rotating cam 47 is rotated from the position shown in Figure 1 to the position indicated by the chain line in Figure 5. The waiting time is set mechanically.

During this waiting time, the operation of setting the mode switching pin 60 to the FWD position A by selecting the stop position of the detection lever 35 described above is almost completed. Then, when the drive lever 53 is rotated clockwise as shown in FIG.
A mode cutting bar 58 is moved upwardly as shown in FIG. 7 by means of a fulcrum shaft 59 attached thereto.

At this time, the mode cutting pin 60 is set to F as shown in FIG.
It engages with one end 86a of the WD lever 86 and pushes it upward by a predetermined stroke. As a result, this FWD
The FWD drive system is switched by the lever 86, and the tape recorder is switched to the FWD mode. Note that the energization time of the plunger 3 is short, and the energization is cut off shortly after the drive gear 6 starts rotating the cam gear 45.

As a result, the suction rod 3a is pushed back by the spring 3b as shown in FIG. 6, and the pin 51 is brought into contact with the circumferential surface of the disk portion 48 of the cam gear 45 again. Then, the drive lever 53 reaches the forward position shown in FIG.
When the lever 86 is completely pushed down by a predetermined stroke, the pin 68 engages with the protrusion 67 of the lock lever 64, and the lock lever 64 is locked.

At this time, as described above, when the detection lever 35 is moved forward to the forward movement position P2 shown by the chain line in FIG. It is rotated counterclockwise around the fulcrum shaft 65. As a result, the lock lever 64 is once moved to the unlock position shown by the chain line in FIG.
The detection lever 35 moves back and forth immediately after reaching the forward position pupil P2.
Since the lock lever 64 is moved straight to the P side, as the detection lever 35 moves back, the lock lever 64 is now rotated clockwise in FIG. 6 about the fulcrum shaft 65 by the spring 66. On the other hand, immediately after the drive lever 53 starts rotating clockwise by the eccentric rotating cam 47 as shown in FIG. 6, the pin 56 of the drive lever 53 comes into contact with the protrusion 33 of the selection lever 23.

When the drive lever 53 is subsequently rotated clockwise, the pin 56 pushes the protrusion 33 and pushes the selection lever 23 upward against the spring 25 as shown in FIG. As a result, the protrusion 31 of the selection lever 23 is extracted upward from the recess 43 of the detection lever 35. At that moment, the detection lever 35 is released from the stopped state at the stop position P3.
This detection lever 35 is moved back to a return position P shown in FIG. 7 by a spring 36. Note that due to this backward movement of the detection lever 35, the protrusion 31 of the selection lever 23 rides on the convex portion 41 again. Further, due to the above-mentioned double movement of the detection lever 35,
The lock lever 64 also returns to the return position shown in FIG. 7, that is, to the locked position, but during the return, the pin 68 of the drive lever 53 rides on the protrusion 67 of the lock lever 64, and as shown in FIG. The drive lever 53 is locked by the lever 64. Since the drive lever 53 is locked in the forward position shown in FIG. 7, the FWD lever 86 is also locked in the forward position, and the FWD mode is in the locked state.

Note that after the drive lever 53 is locked, the cam gear 45 idles. When the cam gear 45 completes one rotation, the notch 50 reaches its initial position, and the driving of the cam gear 45 by the drive gear 6 ends. At this time, the protrusion 49 of the cam gear 45 comes into contact with the tip of the pin 51, and the cam gear 45 returns to its original state and is stopped again. The series of operations related to FWD mode switching is thus completed.

[REC mode switching operation]

This REC mode switching operation is shown in FIGS. 2 and 8.

This REC mode switching operation is the same as the FWD mode switching operation described above, but the REC mode is selected by making the energization time of the plunger 1 longer than when switching to the FWD mode. When the REC mode changeover switch is turned on, power is supplied, the mo-outer trowel cab stan 5 is driven to rotate, and the plungers 1 and 3 are energized almost simultaneously.

However, at this time, the time required for the plunger 1 to pass is set longer than when switching to the FWD mode, and the suction rod la is operated for a longer period of time than when switching to the FWD mode. By the way, when the suction rod la of the plunger 1 is sucked, the conversion lever 77 is slightly rotated counterclockwise about the fulcrum shaft 76 by the pin 79 as shown by the chain line in FIG.

Then, green is selected again and the bar 73 is moved to the fulcrum shaft 7 by the spring 75.
4 in the counterclockwise direction as shown by the chain line in FIG. As a result, one end 73a of the mirror reselection lever 73 enters the movement locus of the pin 61 of the mode switching lever 58.
It is then held in that state for a predetermined long time.
Meanwhile, during this time, the same operation as the above-mentioned FWD mode switching is performed, and the drive lever 53 is rotated clockwise in FIG. The mode switching lever 58 has been moved upward in FIG.

At this time, the pin 61 of the mode selection bar 58 is brought into contact with one end 73a of the green reselection lever 73, and this
Push it upwards as shown. As a result, the green re-cutting bar 71 is moved by the spring 7 by the fulcrum ball 74 of the green re-selection lever 73.
2, the mirror re-switching lever 71 switches the mirror re-switching switch 82 to the recording state, and the tape recorder is switched to the REC mode. After the above, the plunger 1 is de-energized.

Then, due to the movement of the suction rod la, the conversion lever 77
is rotated clockwise as shown by the solid line in FIG. 2 to return to its original state, and the green reselection lever 73 is also expanded by the spring 75 by the pin 80 and rotated clockwise as shown by the solid line in FIG. Then, one end 73a is removed from the pin 61 and returns to its original state. In addition, even when switching the FWD mode mentioned above, the mirror reselection lever 73 is rotated once as shown by the chain line in FIG. Immediately after starting to move upward from the position shown in FIG. 6, this mirror reselection bar 73 returns to the position indicated by the solid line in FIG. 2.

Therefore, when switching to the FWD mode, the recording/reproducing selection lever 73 and the green re-switching lever 71 are not pushed up by the above-mentioned switch 61, and the green re-switching switch 82 is maintained in the reproducing state. [FF mode switching operation] This F
The F mode switching operation is shown in FIG.

When the FF mode changeover switch is turned on, power is supplied, the capstan 5 is driven to rotate by the motor, and the plungers 2 and 3 are energized almost simultaneously. At this time, the suction rod 2a of the plunger 2 is sucked upward, and the activation lever 16 is rotated clockwise by the protrusion 21 against the spring 19. As a result, the detection lever 35 is reciprocated once in the same way as when switching to the FWD mode. At this time, the pin 29 moves from the lower end position of the most hole 27 of the other selection lever 23 to the upper end position due to the suction of the suction rod 2a, and this selection lever 23 is held at the raised position.

However, in this case as well, the pin 29 only moves within the elongated hole 27 and does not substantially pull up the selection lever 23, so that the selection lever 23 does not act as a suction load on the plunger 2.

At this time, when the detection lever 35 is moved forward by the stroke S3 explained in FIG.

At that moment, the selection lever 22 is slid downward by the spring 24, and the protrusion 30 moves from the convex part 40 to the concave part 42.
Go inside. As a result, as explained in FIG. 4, when the detection lever 35 is moved back, the protrusion 3 of the selection lever 22
01, the motor is stopped at the stop position P4, and the mode switching pin 60 of the bar 58 is set to the FF position B.

After that, similarly to when switching the FWD mode, the drive lever 53 switches the mode and the bar 58 is moved upward, so that the mode switching pin 60 engages with one end 87a of the FF lever 87 and pushes it upward. Push up the specified stroke to the side.

As a result, the FF travel drive system is switched by the FF lever 87, and the tape recorder power is switched to the F mode.
At this time, when the drive lever 53 is rotated clockwise, the pin 56 pushes the projection 32 of the selection lever 22, pushing the selection lever 22 upward against the spring 24.

As a result, the protrusion 30 of the selection lever 22 is pulled out upward from the recess 42 of the detection lever 35, and the detection lever 35 is unlocked at the stop position P4. Furthermore, by the subsequent return movement of the detection bar 35 to the return movement position P,
The protrusion 30 of the selection lever 22 rides on the protrusion 40 again. [REW mode switching operation] This REW mode switching operation is shown in FIG.

When the REW mode selector switch is turned on, power is supplied to the motor and the capstan 5 is turned on.
are driven to rotate, and the plungers 1, 2, and 3 are energized almost simultaneously. And at this time plunger 1
and 2 suction rods la. As 2a is attracted upward, the activation lever 16 is rotated clockwise by these protrusions 20 and 21 against the spring 19.

As a result, the detection lever 35 is reciprocated once at the same time as when switching the FWD mode. Also, at this time, both pins 2 are removed by the suction of both suction rods la and 2a.
8 and 29 are both elongated holes 26 and 27 of both selection levers 22 and 23.
from the lower end position to the upper end position, and hold both of these selection levers 22, 23 in the raised position.

Therefore, in this case, as explained in FIG.
5 is returned to the return position P and stopped, and the mode switching pin 60 of the mode switching lever 58 is set to the REW position C.

At this time, in the same way as when switching the FWD mode, the mode switching bar 58 is moved upward by the drive lever 53, so that the mode switching pin 60 engages with one end 88a of the REW lever 88 and Push up the specified stroke.

As a result, the REW travel drive system is switched by the REW lever 88, and the tape recorder power is switched to the REW mode. [STOP mode switching operation] This STOP mode switching operation is shown in FIG.

This STOP mode switching is performed by the FWD, REC, and
This is performed in the middle of each of the FF and REW modes. In each of the above modes, the detection lever 35 is stopped at the stop position PI, and the drive lever 53 is locked by the lock lever 64 at the reciprocating position shown by the chain line. When the STOP mode selector switch is turned on in the approved state, plungers 1 and 2 are energized almost simultaneously, and both suction rods la and 2a are attracted upward. As a result, with both selection levers 22 and 23 held in the upward position, as in the case of switching to the REW mode,
The detection lever 35 will be reciprocated once. At this time, the detection lever 35 moves to the reciprocating position P2 explained in FIG.
When the other end 35b is moved forward, the lock lever 64
The lock lever 64 is rotated counterclockwise about the fulcrum shaft 65 against the spring 66 by pushing the tip 64b of the lock lever 64 . Then, the protrusion 67 of the lock lever 64 comes off the pin 68 of the drive lever 53 to the left, and the drive lever 53 is unlocked. As a result, the drive lever 53 is moved to the fulcrum shaft 5.
4 in the counterclockwise direction by a spring 55, and is moved back to the return position shown by the solid line. By restoring the drive lever 53 and the detection lever 35, the mode inspection bar 58 is returned to its original position. At the same time, the FWD, FF, and REW levers 86, 87, and 88 are returned to their initial positions, and the tape recorder is switched to the STOP mode. After this, the power is cut off and the motor stops. According to the mode switching device described above, when switching between FWD, REC, FF, and REW, the F mode switching lever 58 and the mode switching sliding pin 60 are set based on the selection of the stop position of the detection lever 35.
After setting the DW position A, FF position B, or REW position C, select the selection lever 2 using the pin 56 of the drive lever 53.
Both 2 and 23 are pushed up against springs 24 and 25,
While the detection lever 35 is configured to always move back to the previous position P, the forward movement of the detection lever 35 at the time of the next mode change releases the lock of the drive lever 53 in the forward position P. , Since the drive lever 53 is configured to move forward again after this, FWD, REC, FF, REW
It is possible to perform an operation in which each mode can be switched mutually without passing through STOP, a so-called mutual switching operation.

Further, FIG. 12 shows a switch device for preventing malfunctions provided in the mode switching device described above.

First, reference numeral 90 denotes a defect detection switch for the cam gear 45, which is composed of, for example, a microswitch. 91
is each mode switch of FWD, FF, and REW, and is constituted by, for example, a leaf type reversing switch.

Reference numeral 92 denotes a mode setting completion detection switch, which has a leaf-sin trowel configuration, for example.

The position detection switch 90 is pivoted around a fulcrum shaft 94 so as to be freely rotatable, and is switched by a protrusion 97 of a switch operating lever 96 which is rotated clockwise by a spring 35.

Note that this switch operating lever 96 is connected to the cam gear 45.
is pressed against the circumferential surface of the disc portion 48 . The mode switch 91 is configured as a three-contact change-over switch that is switched by a reversing operation of the reversing lever 99 about the fulcrum 100. And the neutral position of the reversing lever 99 is FF.
It is set at mode position B'. Note that when the reversing lever 99 is rotated counterclockwise from the FF mode position B', it is set to the FWD mode position A', and when the reversing lever 99 is rotated clockwise from the FF mode position B'. The rotated position is set as REW mode position 〇. However, this reversing lever 99 is in FWD mode position A' and RE.
Always FF mode position B from either W mode position C'
It has a structure that allows it to automatically return to '. The reversing lever 99 of the mode switch 91 is reversely operated by a bifurcated operating portion 105 of a switch actuating lever 104 pivotably supported around a fulcrum shaft 102 . Note that this switch operating lever 104 is formed with a V groove 106, and the pin 61 of the mode switching lever 58 is inserted into this V groove.
It is inserted into the groove 106. Further, the mode setting completion detection switch 92 is switched by the pin 56 of the drive lever 53. According to this switch device, first, in the STOP mode, the switch operating lever 96 rests on the protrusion 49 of the cam gear 45, and the position detection switch 90 is in the OFF state.

Then, at the moment when the aforementioned FWD, FF, or REW mode switching operation is started and the cam gear 45 is slightly rotated clockwise, the switch operating lever 96 is rotated clockwise by the spring 95. It falls onto the surface of the disc portion 48 from above the protrusion 49 . The protrusion 97 then presses the position detection switch 90, turning it on. Further, during the mode switching operation, when the mode switching lever 58 is moved upward by the drive lever 53 with the mode switching lever 58 set to any of the FWD position FALSE A, FF position FALSE B, and REW position False C, as described above. Then, the pin 61 is inserted deep into the V-groove portion 106 of the switch actuating lever 104.

At this time, when switching to the WD mode, the pin 61 presses one slope 106a of the V-groove portion 106 and rotates the switch actuating lever 104 clockwise, so that the reversing lever 99 is moved by the operating portion 105 into the reverse direction. direction and is switched to the FWD mode position A'. Furthermore, when switching to the REW mode, the pin 61 pushes the other slope 106b of the V-groove portion 106 and rotates the switch actuation lever 104 in the direction of the reversal indicator. It is rotated and switched to the REW mode position C'. Note that when switching to the FF mode, the switch operation lever 104 is not rotated in the clockwise or counterclockwise direction using the pin 61. Therefore, the reversing lever 99 is maintained at the FF mode position B'. Further, as described above, the drive lever 53 is moved forward to the forward position shown in FIG. 7, and this is locked by the lock lever 64, thereby completing the mode switching operation and entering the mode setting state. However, just before the mode setting is completed, the pin 56 of the drive lever 53 presses the mode setting completion detection switch 92 to turn it on.

Furthermore, immediately before the cam gear 45 completes the above-described one-rotation operation after the above-described lotus operation, the switch operating lever 96 is pushed up against the spring 95 by the protrusion 49 to its initial state, and the position detection switch 90 is pushed up. is switched to the off state again.

In the embodiments described above, the cam gear 8 referred to in the present invention is a half-rotation drive type cam gear 8 having two notches 11a and 11b. It is also possible to change 8 to a single rotation type cam gear.

Further, the selection levers 22, 23 and the two plunger solenoids 1, 2 for controlling the selection levers 22, 23 referred to in the present invention can be changed to three or more.

As described above, the present invention is configured such that the detection lever is reciprocated by the cam gear by the operation of the activation lever, and the mode to be switched is selected by selecting the return stop position of the detection lever using two selection levers. However, at that time, the suction rods of the two plunger solenoids and the two selection levers were interlocked with each other with a predetermined stroke of play, and when the plunger solenoid was operated for suction. , the suction rod operates only the starting lever and prevents the forward movement of the selection lever linked to the suction rod by the spring, while the plunger solenoid, which is not suctioned, detects the associated selection lever. By moving the lever within the range of play in relation to the forward movement of the lever by a spring, the moved selection lever is engaged with the detection lever to select a backward movement stop position of the detection lever. Therefore, the two selection levers do not apply any suction load to the plunger solenoid. Therefore, since the suction load on the plunger solenoid can be extremely reduced, the plunger solenoid can be constructed into an ultra-compact device, and costs can be significantly reduced. Furthermore, it is possible to significantly reduce the tortoise force, and the built-in battery specification can be easily achieved.

[Brief explanation of the drawing]

The drawings show an embodiment in which the present invention is applied to a tape recorder, in which Fig. 1 is a plan view in STOP mode, and Fig. 2 is a plan view of the same mirror reswitching device. , Fig. 3 is an exploded perspective view, Fig. 4 is a plan view illustrating the main operation of mode switching, Figs. 5 to 7 are plan views illustrating FWD mode switching operation, and Fig. 8 is REC mode switching operation. 9 is a plan view for explaining the FF mode switching operation, FIG. 10 is a plan view for explaining the REW mode switching operation, and FIG. 11 is a plan view for explaining the STOP mode switching operation. FIG. 12 is a plan view illustrating the switch device. Also, in the symbols used in the drawings, 1 and 2 are plunger solenoids, 6 is a drive gear, 8 is a cam gear, and 1 is a plunger solenoid.
6 is a starting lever, 22, 23 is a selection lever, 24, 25
is the spring, 26 and 27 are the holes, 28 and 29 are the pins, 30,
31 is a protrusion, 35 is a detection lever, 36 is a spring, 40, 4
1 is a convex portion, and 42 and 43 are concave portions. Figure 1 Figure 2 Figure 3 Figure 12 Figure 4 Figure 5 Figure 6 Figure 11 Figure 7 Figure 10 Figure 8 Figure 9

Claims (1)

[Claims] 1. A drive gear driven by a motor, a cam gear having a notch and a cam, an activation lever for starting the rotation of the cam gear by the drive gear, and a drive gear driven in reciprocating motion substantially by the rotation of the cam gear. a detection lever configured to select a return stop position of the detection lever; two selection levers for selecting a return stop position of the detection lever; two plunger solenoids adapted to actuate the actuating levers, and springs for making the two selection levers substantially perpendicular to the detection lever and pressing each selection lever against the detection lever, respectively. When each of these selection levers is pressed against the detection lever by the spring, a protrusion provided on each selection lever engages with the selection lever to select a return stop position of the detection lever. an engaging portion is provided on the detection lever, and the suction rod of each of the plunger solenoids and each of the selection levers are interlocked with each other with a predetermined stroke of play, and the suction rod of each of the plunger solenoids is selectively moved. By causing the suction rod to move within the range of the play, the one of the selection levers associated therewith is prevented from moving forward by the spring, and the suction rod at this time is moved within the range of the play. The activation lever is actuated by the movement of , and when the detection lever moves forward by a predetermined stroke, the other selection lever is moved forward by the spring within the range of play. A mode selection device for a recording/reproducing apparatus, wherein the selection lever is engaged with the detection lever, and a mode to be switched is selected by selecting a return stop position of the detection lever.