JPS6016016B2 - Tape shift device in tape running device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a first tape shift member having one end thereof rotatably supported and a tape shift member such as a first tape shift pin and a second tape shift pin attached to the other end thereof. and a second tape shift lever, a connecting lever that connects the first and second tape shift levers to each other, and a connecting lever that connects the first and second tape shift levers to shift the tape to a predetermined state. The present invention relates to a tape shifting device in a tape running device, each of which is provided with actuating means for forward rotation.

The present invention is most suitable for application to dual capstan type tape recorders, VTRs, EVRs, etc. that use a recording medium such as a magnetic tape as the tape.
2. Description of the Related Art Conventionally, tape recorders have been known in which a tape shift lever having a tape shift pin moves forward to shift a magnetic tape to a predetermined running path during playback or recording.

However, when only one such tape shift lever is used, it is difficult to shift the tape to a predetermined running path. It is also conceivable to use a plurality of tape shift levers, but in this case, if these levers are individually rotated in the forward direction, the operating mechanism thereof will be complicated. The present invention has been devised to correct the above-mentioned defects, {a} having first and second tape shift members (a) rotatably supported at one end thereof, and having first and second tape shift members (
For example, first and second tape shift levers (for example, pinch levers 45 and 46 described below) to which tape guide pins 62 and 63 described later are respectively attached, {b}
A connecting lever that connects these first and second tape shift levers to each other (for example, an operating lever 47 described below)
, 'c' in a tape shifting device in a tape traveling device, each comprising actuating means for rotating the first and second tape shift levers in order to shift the tape to a predetermined state. first and second engagement means consisting of slots and pins connecting intermediate portions of the first and second tape shift levers and both ends of the connecting lever; [d. intermediate portions of the connecting lever; a drive unit (for example, intermediate levers 53, 54 described below) attached to the section, [f} a first actuating means (for example,
(a motor 80, a belt 83, a cam pulley 75, a profiling lever 73) to be described later; (g) a second actuating means (for example, a plunger 61 to be described later) capable of reciprocating the driving member;
, wherein when the first and second tape shift members are in the backward movement state of the tape in the forward position, the first tape shift lever is rotated in the forward direction by the operation of the first actuating means. when the forward rotation is transmitted to the second tape shift lever via the connection lever, whereby the first and second tape shift levers are respectively rotated forward in a predetermined relationship; In conjunction with these forward rotations, the first and second tape shift members move from their respective backward movements to intermediate forward movement positions where the tape cannot yet come into contact with tape feeding means such as a capstan. When the tape is shifted to an intermediate forward movement state, and the drive member is moved forward by the operation of the second actuating means in the intermediate forward movement state of the tape, this forward movement is caused by the movement of the connecting lever. is transmitted to the first and second tape shift levers, whereby the first and second tape shift levers respectively rotate forward to the rear, and in conjunction with these forward rotations, the first and second tape shift levers rotate. and a second tape shift member is configured to move forward from the intermediate forward movement position to a final forward movement position where the tape can be brought into contact with the tape feeding means, thereby shifting the tape to the final forward movement state, By,
When both the first and second actuating means are actuated, the final forward movement state of the tape is obtained, and only the first actuating means is actuated and the second actuating means is in an inoperative state. The structure is such that an intermediate state of forward movement of the tape can be obtained at times.

With this configuration, it is possible to provide a tape shifting device in a tape traveling device that is simple in structure, reliable in operation, durable, and capable of achieving relatively complicated tape shifting conditions. In a further development of the present invention, the first actuating means capable of reciprocally rotating the first tape shift lever is 'a' a rotary body; 'b} a rotary drive means for rotationally driving this rotary body; '
c - an operating section provided at the eccentric 0 position of this rotating body;
[d} A rotatable profiling lever engaged with the actuating portion; a biasing means such as a coil spring for biasing the profiling lever against the actuating portion;
'fl an actuating part provided on the profiling lever and related to the first tape shift lever, and the profiling lever is moved forward and backward by each rotation of the rotating body by 1800 degrees. This movement is repeated sequentially, and the first tape shift lever is caused to rotate forward and backward in conjunction with the forward rotation and backward rotation.

In this case, even if the rotation of the rotating body is at a constant speed, the above-mentioned forward and backward rotations of the profiling lever are slow in the initial state and final state, and are maximum at the intermediate point. gradually changes. Also, this change is not a linear change,
In the initial state and the final state, it becomes extremely small. Therefore, since the first tape shift lever and even the second tape shift lever can be operated in the same manner, there is no possibility that the shifted tape will be disturbed. Next, an embodiment in which the present invention is applied to a large cassette type dual capstan type tape recorder that uses a tape cassette larger than the normally used compact cassette (hereinafter referred to as a large cassette) will be described with reference to the drawings. .

First, to describe the structure of the first embodiment shown in FIGS. 1 to 11, as shown in FIGS. 1 to 5, a top panel 3 is attached to the top surface of the cabinet of the tape recorder, and A mechanical chassis 2 is attached inside the cabinet 1. As clearly shown in FIG. 2, an opening/closing lid 5 is provided on the front surface of the cabinet 1 in correspondence with the cassette storage space 4 of the tape recorder. The lower end of the opening/closing lid 5 is rotatably supported on the cabinet 1 by a fulcrum pin 8. 5a is a transparent plate for viewing the cassette provided on the opening/closing lid 5, and 6 is a leaf spring attached to the opening/closing lid 5 for holding down the cassette.

As shown in FIG. 2, a pair of supply and take-up reel stand servo motors 11 are installed inside the mechanical chassis 2 to drive the supply reel stand 12 and take-up reel stand 13 individually. ing.

A supply reel stand 12 and a take-up reel stand 13 are directly connected to the shafts 18 of these motors, respectively, and a supply reel axis 14 and a take-up reel axis 15 are formed at the center of the surface of these reel stands, respectively. has been done. As shown in FIGS. 1 to 5, the supply reel shaft 14 and the take-up reel shaft 15 have conical tip portions that act as guides when mounting the large cassette 7 stored in the cassette storage space 4. 23 and a stepped portion 24 for positionally regulating the back side of the large cassette 7.

In addition to the cassette positioning pins 21 and 22, a stopper pin 25 is fixed to the mechanical chassis 2 in a shield manner at its tip for regulating the position of the back side of the cassette. As clearly shown in FIG. 2, an eject operating plate 31 is disposed in the cassette storage space 4, and the lower end of the eject operating plate is rotatably supported on the cabinet 1 by a fulcrum pin 32.

Further, the eject operating plate 31 is formed with a reel shaft insertion hole, a positioning pin insertion hole, a stopper pin insertion hole, a pinch roller insertion notch, and the like. As clearly shown in FIG. 1, the large cassette 7 has pinch roller insertion notches 33 and 34 formed in a row on its front surface.

Tape guide rollers 35 and 36 are rotatably disposed near both ends of the front surface of the cassette. The magnetic tape 40 unwound from the supply reel 16 passes through tape guide rollers 35 and 36 and is wound onto a take-up reel 17. As shown in FIG. 1, the tape recorder is provided with a supply side pinch roller 41 and a take-up side pinch roller 42, respectively, corresponding to the pinch roller insertion notches 33 and 34 of the large cassette 7.

These pinch rollers 41 and 42 are attached to a pinch lever 45.
and 46, respectively, and the ends of these pinch levers are rotatably supported on the mechanical chassis 2 by fulcrum pins 43 and 44. Tape guide pins 62 and 63 are fixed to the pinch levers 45 and 46 adjacent to the pinch rollers 41 and 42, respectively, and slots 50 and 51 are provided in the intermediate portions of the pinch levers 45 and 46, respectively. It is formed. Connecting pins 4 are inserted into these slots 50 and 51.
8 and 49 are respectively inserted, and these connecting pins 48
and 49 are attached to both ends of the operating lever 47 on the inside (second
A shield is installed and fixed so that it extends to the left side of the figure. As shown in FIG. 1, the intermediate portion of the operating lever 47 is rotatably connected to one end of the second intermediate lever 53 by a connecting pin 52.
The intermediate portion of the second intermediate lever 53 is connected to the first intermediate lever 54.
It is rotatably supported on the mechanical chassis 2 by a fulcrum pin 55 along with one end thereof.

First and second intermediate levers 53 and 5 clearly shown in FIG.
4 has a traction coil spring 56 at the other end.
Both ends are fastened to each other. Therefore, as shown in FIG. 2, these levers are normally maintained in a state in which the side end 54a of the first intermediate lever 54 is in contact with the inner surface 53a of the second intermediate lever 53. A slot 59 is formed near the end of the first intermediate lever 54, and the first intermediate lever 54 is connected to a rod 60 of a pinch roller crimping plunger 61 by a connecting pin 58 inserted through the slot. One end of a traction coil spring 57 is also fixed to the other end of the second intermediate lever 53, so that the second intermediate lever 53 is always rotated counterclockwise in FIG. 1 using the fulcrum pin 55 as a fulcrum. Forced. As clearly shown in FIG. 1, stoppers 71 and 72 are fixed to the mechanical chassis 2 by shields corresponding to the vicinity of the tips of the pinch levers 46 and 46, respectively, and these pinch levers 45 and 46 are fixed to their return rotation positions. It is regulated by these stoppers 71 and 72.

A pressing pin 70 corresponds to a pressed portion 45a formed near the base end of the pinch lever 45 shown in FIG. This pressing pin 7 is fixed to one end of the profiling lever 73 in a shield manner, and this profiling lever is rotatably supported on the mechanical chassis 2 by the aforementioned fulcrum pin 43. As shown in FIG. 1, a traction coil spring 74 is fixed near one end of the profiling lever 73.
It is constantly energized in the counterclockwise direction in Figure 1 with 3 as the fulcrum. A bent portion 73a is formed in the intermediate portion of the profiling lever 73, and a lever switch 79 is disposed on the mechanical chassis 2 in correspondence with this bent portion. The distal end 73b of the profiling lever 73 is connected to the constriction 77a of the operating pin 77 shown in FIG.
The operating pin 77 is eccentrically attached to the periphery of the tape shift cam pulley 75. A belt 83 is hung around this camcorder, and this belt is also hung around a motor pulley 82, and the motor pulley is fixed to the shaft 81 of the tape shift motor 80. As clearly shown in FIG. 8, the tape shift cam pulley 75 is rotatably supported on the mechanical chassis 2 by a rotating shaft 76.

Further, on the lower surface of the cam pulley 75, protruding cam portions 75a and 75b extending in all directions are formed at an interval of 180 degrees from each other.
8 are arranged. As clearly shown in FIGS. 1 and 7, a substantially triangular cam brake lever 91 is disposed between the tape shift cam pulley 75 and the supply reel stand 12, and this lever has one apex portion thereof. The fulcrum pin 92
It is rotatably supported on the mechanical chassis 2 by.

Brake shoes 93 and 94 are attached to the remaining two apexes of the cam brake lever 91, respectively, and these shoes are adapted to selectively contact the tape shift cam pulley 75 and the supply reel stand 12, respectively. . A brake shoe 94 is attached to the cam brake lever 91.
Since a traction coil spring 90 is fixed nearby, this lever is always urged counterclockwise in FIG. 1 with the fulcrum pin 92 as a fulcrum. As clearly shown in FIG. 7, the cam brake lever 91
One end of an actuating lever 95 (upper machine in FIG. 7) is disposed opposite to one side.

The operating lever 95 is indirectly rotatably supported on the mechanical chassis 2 by a fulcrum pin 96, and its tip is inserted into a gate 89 formed in the mechanical chassis 2 and extends to the outside of the mechanical chassis. . A notch 98 is formed at the end of the actuating lever 95, and the actuating lever is connected to a plunger rod 99 of a cam brake plunger 100 by a connecting pin 97 inserted through the notch. As clearly shown in FIG. 9, a gate 101 is formed in the mechanical chassis 2 between the supply reel stand 12 and the take-up reel stand 13.

Then, on one side of this closed part, the mechanical chassis 2 has the following:
A pair of projecting pieces 102 and 103 are formed, respectively, and one half of an L-shaped actuating plate 104 is inserted into the closing opening 101. Projecting pieces 102 and 103 are inserted into rectangular closures 105 and 106 formed in this actuating plate 104, respectively. Therefore, the actuating plate 104 is connected to the projecting piece 102.
and 103 are pivot points, respectively. As shown in FIG. 9, one end (the ninth
Since a traction coil spring 107 is fixed to the lower end of the drawing, this actuating plate is biased counterclockwise in FIG.

A rectangular opening 120 is formed in the flat plate portion of the actuating plate 104, and an intermediate portion of a brake lever 109 is rotatably supported on the actuating plate 104 at a portion adjacent to this closing portion by a fulcrum pin 119. There is. A stopper portion 109a is formed at the intermediate portion of the brake lever by a bent portion thereof, and this stopper portion 109a is inserted into an opening 120 of the actuating plate 104. Therefore, when the brake lever 109 rotates by a predetermined angle in the clockwise or counterclockwise direction in FIG.
The rotational position of the brake lever 109 is regulated. One end of a traction coil spring 108 is fixed to the stopper portion 109a, and the other end of this spring is fixed to the actuating plate 104. Therefore, brake lever 1
09 is energized by the pulling force of the spring 108 to maintain the horizontal state shown in FIG. As shown in FIG. 9, brake shoes 1 are attached to both ends of the brake lever 109.
10 and 111 are respectively attached, and these shoes face the back surfaces of the main reel stand 12 and the take-up reel stand 13, respectively.

A mounting slope 115 is formed at one end of the actuating plate 104, and projecting pieces 112 and 113 are formed on the left and right sides of this mounting slope, respectively. The connecting plate 114, which is positioned between these projecting pieces and screwed to the mounting slope 115, is inserted into a closing opening 121 shown in FIG. 1 formed in the mechanical chassis 2. Reel brake plunger 11 by connecting pin 116
8 plunger rod 117. As shown in FIGS. 1 to 5, the supply side and take-up side pinch rollers 4
1 and 42, respectively, the supply side capstan 13
1 and a winding-side capstan 132 are provided, respectively.

These capstans are supported by capstan bearings 133 attached to the mechanical chassis 2 and pivot bearings 134 attached to the motor mounting plate 140, respectively. A capstan pulley 135 is attached to the base ends of the capstans 131 and 132, and a belt 136 that is hung over the motor pulley 137
It is also hung on This motor pulley 137 is attached to a shaft 138 of a capstan servo motor 139 attached to a motor attachment plate 140', and this motor attachment plate is fixed to the upper surface panel 3, the cabinet 1, etc. As shown in FIGS. 1 to 5, the head substrate 1 is attached to the mechanical chassis 2 by mounting punches 143 and 144 between the carburetors 131 and 132 on the mating side and the winding side.
45 is fixed.

An erasing head 146, a recording head 147, a reproducing head 148, and a tape guide pin 149 are normally arranged on this head substrate along the running direction of the magnetic tape 40. As shown in FIGS. 2 and 11, a locking groove 151 is formed in the opening/closing lid 5, and a locking member 152 having a locking claw 152a is disposed inside the front slope of the cabinet 1 corresponding to this locking groove. It is set up.

This locking member is attached to one end of the connecting lever 153, and the intermediate portion of this lever is rotatably supported on the front plate of the cabinet 1 by a fulcrum pin 154. A pressed portion 153a is provided at the other end of the connection lever 153,
A traction coil spring 158 is fixed to the connecting lever 153 at a portion adjacent to the pressed portion 153a. Therefore, the connecting lever 153 is biased counterclockwise in FIG. 11 with the fulcrum pin 154 as a fulcrum by this spring. The previously described pressed portion 1 of the connecting lever 153
An eject lever 156, which is rotatably supported by the cabinet 1 via a fulcrum pin 155, is disposed opposite to the eject lever 53a. And the pressing part 15 of this lever
6a extends to the outside of the cabinet 1 through an opening 157 formed in the front slope of the cabinet 1. Next, to describe the operation of the first embodiment described above, when using the first embodiment, first press the pressing part 156a of the eject lever 156 shown in FIGS. 2 and 11 with your finger to release the opening/closing lid 5.
All you have to do is open it.

That is, due to this pressing, the eject lever 156 rotates clockwise in FIG. 2 about the fulcrum pin 155 and reaches the position shown by the chain line in FIG. 2. Therefore, since the pressed portion 153a of the connecting lever 153 is pressed downward by the eject lever 156, the connecting lever 153 rotates clockwise in FIG. 11 about the fulcrum pin 154 against the spring 158. For this purpose, the locking member 152 is Since the lock claw 152a is disengaged from the lock groove 151 of the opening/closing lid 5, the opening/closing lid 5 is rotated clockwise in FIG. The figure reaches the position indicated by the chain line. Further, in this state, since the cassette 7 is not stored in the cassette storage space 4, the eject actuation plate 31 is moved to the second position by the biasing force of a spring (not shown).
It already exists in a state where it has been rotated forward to the position indicated by the chain line in the figure. When the large cassette 7 is inserted into the cassette storage space 4 in the state shown by the chain line in FIG. ), stored in a fan-shaped space.

Next, when the opening/closing lid 5 is pushed from the outside against the spring, this lid rotates counterclockwise in FIG.
is pushed to the left in Fig. 2 through. Therefore, the cassette is pushed toward the cassette storage space 4, and at this time, the eject actuating plate 31 is pushed against the spring, so that the actuating plate rotates counterclockwise in FIG. 2 about the fulcrum pin 32. Accordingly, the eject operating plate 31 and the opening/closing lid 5 move back and forth to the state shown by the solid line in FIG. 2, and the cassette 7 moves back to the state shown by the chain line in FIG.

At this time, the lock pawl 162a of the lock member 152 engages with the lock groove 151 of the opening/closing diamond 5 to maintain these forward movement states. Also, when the cassette 7 moves forward, the positioning pin 21
, 22 to a predetermined position. The back surface of the cassette is pressed against the stepped portions 24 of the positioning pins 21 and 22 and the tip of the stopper pin 25 by the urging force of the leaf spring 6, respectively. Furthermore, the descendant reel 16 and take-up reel 17 of the cassette 7
A supply reel shaft 14 and a take-up reel shaft 15 are engaged with each other. Also, pinch roller insertion notches 33 and 34
Pinch rollers 41 and 42 are respectively inserted in the .
In this state, when a playback button (not shown) is pressed, a playback operation is performed. That is, when the playback button is pressed, the capstan servo motor 139 and the tape shift motor 80 start to drive, respectively, and the cam brake plunger 100 and the reel brake plunger 11 start to drive.
8 are each in an operating state. When the capstan servo motor 139 shown in FIG. 2 starts to drive as described above, the rotation of the motor shaft 138 is transmitted to the supply side and take-up side capstan pulleys 135 via the motor pulley 137 and the belt 136, respectively. be done.

Therefore, the supply side capstan 131 integrated with these pulleys
and the take-up side capstan 132 begin to rotate. Note that these capstans may be stopped only when a stop button (not shown) is pressed to put the tape recorder in a stopped state, or may be made to rotate constantly while the main switch of the tape recorder is turned on. Further, when the reel brake plunger 118 shown in FIG. 9 is in the operating state as described above, the plunger rod 117
moves downward in FIG. 9, one end of the L-shaped actuating plate 104 is pulled downward in FIG. 9 via the connecting pin 1 16 and the connecting plate 1 14, respectively.

Therefore, this actuating plate moves against the spring 107 and the projecting piece 1
Since the brake lever 109 rotates clockwise in FIG. 9 with fulcrums 02 and 103 as its fulcrum, the brake lever 109 moves in a direction away from the back surfaces of the reel stands 12 and 13, respectively. For this reason, the brake shoes 1 10 and 1 1 1 are separated from the supply reel stand 12 and the take-up reel stand 13, respectively.
The brakes of these reel stands are released at the same time. Further, when the cam brake plunger 100 shown in FIG. 7 is in the operating state as described above, the plunger rod 99 moves downward in FIG. It is towed downward in the figure. Therefore, this operating lever rotates counterclockwise in FIG. 7 using the fulcrum pin 96 as a fulcrum and reaches the position indicated by the chain line in FIG. 7, so that the operating lever 95
Ikebata presses the cam brake lever 91. Therefore, this lever rotates clockwise in FIG. 1 about the fulcrum pin 92 against the spring 9. For this reason, the brake shoe 93 separates from the tape shift cam pulley 75 and the brake of this pulley is released, and the brake shoe 94 comes into pressure contact with the supply V-supply reel stand 12 to apply a brake to this reel stand. When the tape shift motor 80 shown in FIG. 8 begins to drive as described above, the rotation of the motor shaft 81 is transmitted to the tape shift cam pulley 75 via the motor pulley 82 and the belt 83, respectively.

Therefore, this pulley begins to rotate counterclockwise in FIG. 1, and as a result, the cam switch 78, which had been pushed and closed by the protruding cam portion 75a, opens. Due to the above-described rotation of the cam pulley 75, the operating pin 77 starts to rotate counterclockwise in FIG. 1 from the return position shown in FIG.
The tip end 73a of No. 3 is pressed against this operating pin 77. For this purpose, the tracing lever 73 moves clockwise in FIG. 1 with the fulcrum pin 43 as a fulcrum against the spring 74.
presses the pressed portion 45a of the pinch lever 45. Therefore, this pinch lever 45 is connected to the spring 5 shown at the right end in FIG.
7 and rotate clockwise in FIG. 1 about the fulcrum pin 43 as a fulcrum. Therefore, the connecting pin 48 is connected to this pinch lever 45.
1, and finally comes into contact with one end of the slot 50 as shown in FIG. 3. FIG. 3 shows the situation at the moment this contact is initiated. Note that the first
As the pinch lever 45 rotates forward from the state shown in the figure to the state shown in FIG. 3, the operating lever 47 slightly rotates clockwise in FIG. 1 about the fulcrum pin 52.

Therefore, the pinch lever 46 connects the connecting pin 49 and the slot 51.
It receives torque in the clockwise direction in FIG. 1 with the fulcrum pin 44 as the fulcrum. However, since the pinch lever 46 is prevented from rotating in this direction by the stopper 72, the reaction of this torque causes the second intermediate lever 53 and the first intermediate lever 54 to move to the first position with the fulcrum pin 55 as a fulcrum.
Lay it slightly clockwise in the diagram. Further, when the tape shift cam pulley 75 continues to rotate as described above and moves from the state shown in FIG. 3 to the state shown in FIG. 4 (the state rotated 180 degrees from the backward movement position shown in FIG. Fulcrum pin 43
Using the fulcrum as a fulcrum, it further rotates clockwise in Figure 3.

Therefore, the pinch lever 45 also moves further clockwise in FIG. 3, so that the connecting pin 48 is hooked on the end of the slot 50 and pulled upward in FIG. 3. Therefore, since the actuating lever 47 moves linearly upward in FIG. 3, the other pinch lever 46 is also lifted upward in FIG. Rotate clockwise. Furthermore, when the operating lever 47 moves linearly as described above, the connecting pin 52 also moves in the same way.
The second intermediate lever 53 rotates together with the first intermediate lever 54 in the clockwise direction in FIG. 3 about the fulcrum pin 55. When the cam pulley 75 rotates forward to near the state shown in FIG. 4, the bent portion 73a of the profiling lever 73 pushes the lever switch 79 and closes it, so it is detected that the operating pin 77 is near the forward position. be done.

As described above, as the state shown in FIG. 1 passes through the state shown in FIG. 3 and reaches the state shown in FIG.
is moving back and forth. Therefore, pinch rollers 41 and 42
move upward in FIG. 1 from the pinch roller insertion notches 33 and 34 of the cassette and insert the capstans 131 and 132
approach. At this time, these pinch. The controller pulls out the magnetic tape 40 in the cassette from the cassette as shown in FIG. When the magnetic tape is about to be unwound from the reel by this drawer 1, the supply reel stand 12 is braked by the brake shoe 94, so that the tape is unwound only from the take-up reel 17.
As described above, as the tape shift cam pulley 75 rotates approximately 180 degrees from the state shown in FIG. 1 to the state shown in FIG. 4, the profile lever 73 also changes from the state shown in FIG. Rotate clockwise in Figure 1 until the position is reached.

Note that the above-mentioned rotation of the cam pulley 75 is at approximately constant speed;
The above-mentioned forward rotation of the profiling lever 73 changes gradually such that it is slow in the initial state and the final state and becomes maximum at the intermediate point. Therefore, the pinch levers 45, 46 and the pinch roller 41
, 42 perform the same operation, so there is no fear that the magnetic tape shifted to the state shown in FIG. 4 will be disturbed by these pinch rollers. When the cam pulley 75 reaches the state shown in FIG.
Since the lever switch 79 is closed as described above, the cam switch 78 is also closed, and as a result, the tape shift motor 80 is stopped, and the supply 1'-roll stand and take-up roll are Each of the table servo motors 11 starts to drive. Further, the cam brake plunger 00 becomes inactive, and the pinch roller crimping plunger 61 becomes active. When the tape shift motor 80 stops as described above, the torque described above is no longer transmitted to the tape shift cam pulley 75.

Furthermore, when the cam brake plunger 100 becomes inactive, the seventh
The cam brake lever 91 shown in the figure is rotated back to the state shown by the solid line in FIG. 4 by the biasing force of the spring 90.
Therefore, a brake is applied to the tape shift cam pulley 75, and this pulley is accurately stopped at a predetermined position, and at the same time, the brake on the supply reel stand 12 is released. Furthermore, when the pinch roller crimping plunger 61 shown in FIG. 4 enters the operating state as described above, the plunger rod 60 moves downward in FIG. 4 and changes from the state shown in FIG. 4 to the state shown in FIG. 5.
The first intermediate lever 54 moves clockwise in FIG. 4 about the fulcrum pin 55 against the springs 56 and 57.

Therefore, the second intermediate lever 53 is elastically pulled downward in FIG. 4 by the first intermediate lever 54 via the spring 56. Note that this traction force is larger than the elastic traction force by the spring 57, so the second intermediate lever 53 is attached to the fulcrum pin 6.
5 as a fulcrum and rotates clockwise in FIG. 4. Therefore, the operating lever 47 is connected to the connecting pin 52 by the second intermediate lever 53.
4, the pinch levers 45 and 46 rotate clockwise and counterclockwise in FIG. 4 using the fulcrum pins 43 and 44, respectively, as fulcrums. As soon as the forward rotation of the pinch lever 45 is started, the connecting pin 48 breaks contact with the end of the slot 50 and moves within the slot again toward the intermediate portion.

On the other hand, the connecting pin 49 is connected to the slot 5 until the above-mentioned forward rotation of the pinch lever 46 is completed after the playback button is pressed.
There is no contact with the end of 1. When the pinch levers 45 and 46 each rotate forward as described above, the pinch roller 4
1 and 42 are pressed against the capstans 131 and 132, respectively, so that the magnetic tape 40 is pinched by the two sets of capstans 131 and 132 and the pinch rollers 41 and 42, as shown in FIG.

It is a closed loop with a dual cab stan structure. The forward rotation stroke of the first intermediate lever 54 is set to be sufficiently larger than the above-mentioned forward movement stroke of the pinch rollers 41 and 42. Therefore, since the second intermediate lever 53 does not rotate forward as much as the first intermediate lever 54, the side end 54a of the first intermediate lever 54, which is clearly shown in FIG. 2, is separated from the inner surface 53a of the second intermediate lever 53. For this purpose, the spring 56 is stretched, so that the capstan 131,
The pinch rollers 41 and 42 are pressed against the pinch roller 132 symmetrically and elastically by the biasing force of the spring 56. In this state, the capstan 131,
132 is already rotating as described above.

Therefore, the magnetic tape 40 is unwound from the supply reel 16 and wound onto the take-up reel 17 along the traveling path shown in FIG. At this time, the tape is attached to the tape guide roller 35, tape guide pin 62, pinch roller 41, cabstan 1
31, erasing head 146, recording head 147, reproducing head 148, tape guide pin 149, capstan 13
2. The tape passes through the pinch roller 42, tape guide pin 63, and tape guide roller 36, respectively. Moreover, in this state, since the servo motors 11 for the service charge and winding roll table shown in FIG. These rotating torques are transmitted to the reel stand 12 and the take-up reel stand 13, respectively. Therefore, the supply roll table 12
Back tension is added to the winding roll table 1.
3 rotates to wind up the magnetic tape 40 onto the winding reel 17 . Therefore, in the above state, a predetermined reproduction operation is performed.

In the above case, the playback button is pressed to enter the playback operation state, but if you wish to enter the recording operation state, you may press the record button at the same time as the playback button. In this case, the recording and reproducing circuit is switched to a predetermined recording operation state, but in other respects, the same operation as in the above-described reproducing operation state is performed. If it is desired to enter a pause state in the playback operation state shown in FIG. 5, a pause button (not shown) may be pressed.

When the pause button is pressed, first, the cam brake plunger 100 becomes active, and the pinch roller crimping plunger 61 becomes inactive. When the cam brake plunger 100 shown in FIG. 7 enters the operating state as described above, the brake of the tape shift cam pulley 75 is released and the brake of the supply reel stand 12 is applied in the same way as in the case described above. ).

Note that even if the brake of the cam pulley 75 is released, since the tape shift motor 80 is stopped, this cam pulley also maintains its stopped state. Furthermore, when the brake is applied to the reel stand 12, the pinch rollers 41 and 4 are
Even if the tape 40 is separated from the cab stans 131 and 132, the state in which the tape 40 is wound by the supply reel 16 is maintained just before the pause. In this case, if the brake is not applied to the supply reel stand 12, depending on the state of the tape winding diameter of the supply reel 16 and take-up reel 17, the supply reel 16
The tape may be wound onto the supply reel 16 because the winding torque of the tape is greater than the winding torque of the take-up reel 17.

Also, to a lesser extent, the slack in the tape caused by the separation of the pinch rollers 41, 42 from the capstans 131, 132 is taken up on both the supply reel and the take-up reel. For this reason, when the playback mode is set again,
There is a possibility that playback may not be possible from the same part of the tape as immediately before the pause. However, in this example,
Since the brake is applied to the supply v-supply reel stand 12 as described above, this drawback is corrected. Also, the pinch roller crimping plunger 61 shown in FIG.
When the lever becomes inactive as described above, the first and second intermediate levers 54, 53, the operating lever 47 and the pinch lever are 45 and 46 each rotate slightly.

Therefore, the pinch rollers 41 and 42 are also made of KABSTAN 131 and 1.
32, and all are in the state shown in FIG. 4 (that is, the pose state). Note that the reel stands 12 and 13 will not operate until a predetermined short time has elapsed after pressing the pause button.
In this case, the brake lever 109 and brake shoes 110 and 111 shown in FIG. 9 have not yet been applied, and the servo motor 11 for the supply and winding roll tables is still in a driving state.

Therefore, the winding reel 17 sufficiently winds up the slack tape to make the tape taut. After the above-mentioned predetermined short time has elapsed, the supply and take-up reel stand servo motors 11 each stop, and the reel brake plunger 118 becomes inactive.

When the coupling and take-up reel table servo motors 11 shown in FIG. 2 are respectively stopped as described above, rotational torques are no longer coupled to the supply reel table 12 and the take-up reel table 13, respectively.

Also, the plunger 11 for the reel brake shown in FIG.
When the brake lever 8 becomes inactive as described above, the actuating plate 104 and the brake lever 109 each move back due to the biasing force of the spring 107, contrary to the previously described case where the brake lever 8 becomes in the operating state. Therefore, the brake shoes 110 and 111 press against the combined reel stands 12 and 13, respectively, so that the brakes are applied to these reel stands, thereby holding the tape in the pose state shown in FIG. Next, when the pause button is pressed again, the pause button moves back and the pause state is released, so the servo motors 11 for the supply and take-up reel tables begin to drive, and the plunger 118 for the reel brake is activated. becomes.

Therefore, the state is the same as that from when the pause button is pressed until the above-mentioned predetermined time has elapsed, and the pinch roller crimping plunger 61 is again in the operating state. For this purpose, the same operation as that from the state shown in FIG. 4 to the state shown in FIG. 5 is performed when the playback button is pressed, so that the pinch rollers 41 and 42 are again pressed against the capstans 131 and 132. At this time, the supply reel stand 12 is braked by the brake shoe 94 of the cam brake lever 91, although for a very short time. 'The winding is performed exclusively from the winding roll 17. Therefore, when playback is started again, the portion of the tape immediately before the pause will be played back, so there will be no discrepancy between the tape immediately before and after the pause state. Next, when the stop button is pressed, the cam brake plunger 100 and the pinch roller crimping plunger 61 become inactive.

Therefore, similar to the initial state described above in the pose action state,
The brake on the tape shift cam pulley 75 is released, and the pinch rollers 41 and 42 are applied to the capstan 131 as shown in FIG.
, 132. At the same time, the tape shift motor 80 starts to drive, so the tape shift cam pulley 75 rotates counterclockwise in FIG. 5 from the state shown in FIG. Therefore, the actuating pin 77 similarly rotates and finally reaches the return position shown in FIG. 1, so that the biasing force of the spring 74 causes the tracing lever 73 to return to the position shown in FIG. For this purpose, pinch levers 45, 46 and operating levers 47
Similarly, the first and second intermediate levers 53 and 54 return to the state shown in FIG. In this case as well, the slack tape is wound onto the winding reel 17 as in the case of the previously described pause state. As mentioned above, the cam pulley 75
When the cam pulley 75 rotates a little when reaching the return position shown in the figure, the cam switch 78, which had been pressed by the protruding cam portion 75b, is no longer pressed and opens.

When the cam pulley continues to rotate as described above and the lever 73 rotates again, it is no longer pushed by the bent portion 73a and opens. When the cam pulley 75 continues to rotate as described above, the protruding cam portion 75a pushes the cam switch 78 and closes it, so that the cam pulley plunger 1
00 becomes inactive again. Therefore, Tosonsha reel stand 12
The brake is released, and the tape shift cam pulley 75 is also braked. Note that when a predetermined short time has elapsed after the cam switch 78 is closed, the reel brake plunger 118 becomes inactive, and the supply and take-up reel table servo motors 11 each stop.

Therefore, as in the case of the pause operation described above, the supply and take-up reel tables 12 and 13 are stopped, respectively, and the brake lever 109 and brake shoes 110, 111 apply brakes to these reel tables. in this case,
The braking force applied to the two reel stands changes depending on their rotational directions.

That is, when changing from the reproducing operation state to the stop state as described above, the supply reel stand 12 and the take-up reel stand 13 are each rotating clockwise in FIG. 5. Therefore, when the brake shoes 110 and 111 contact the reel stands 12 and 13, respectively, a force in the direction of arrow A is applied to the brake shoe 1101 and a force in the direction of the arrow B is applied to the brake shoe 111 due to the rotational torque of the reel stand. For this reason, the brake lever 109 shown in FIG. 5 rotates counterclockwise in FIG. 5 using the fulcrum pin 119 as a fulcrum.
The brake shoe 110 is far away from the rut of the supply V-supply reel stand 12, and the brake shoe 111 is closer to the center of the winding reel stand 13. Therefore, even if the pressure force of these brake shoes on the reel stands 12 and 13 is the same, the distance from the center of rotation to the point of application of the force is greater on the supply reel stand than on the take-up reel stand 13. Therefore, brake shoe 1
101. Therefore, the braking force applied to the supply reel stand 12 is greater than the braking force applied to the take-up reel stand 13 by the brake shoe 111, so the supply reel 16 stops more quickly than the take-up reel 17. For this reason, the slack of the tape is effectively wound onto the winding roll table 13. Note that when the fast forward button (not shown) is pressed in the stop state shown in FIG. 1, the take-up reel stand servo motor 11 starts rotating at high speed, and the reel brake plunger 118 shown in FIG. 9 enters the operating state. becomes.

Therefore, as mentioned above, the brake lever 109 and the brake shoes 110, 111 are used to supply and take up the roll tables 12, 1.
3 brakes are released. For this purpose, the magnetic tape 40 is moved along the traveling path shown in FIG.
7, it is wound up at high speed. Further, when the fast forward button is moved backward, the tape recorder is restored to the stopped state. Furthermore, when the rewind button (not shown) is pressed in the stop state shown in FIG.
Since the servo motor 11 is used instead of the reel 1, the magnetic tape is wound onto the reel 16 at high speed along the traveling path shown in FIG.

Further, when the rewind button is moved backward, the tape recorder is restored to the stopped state. Incidentally, if it is desired to take out the large cassette 7 from the cassette storage space 4, the pressing portion 156a of the eject lever 156 can be pressed in the same way as when the opening/closing lid 5 is opened when the cassette is installed as described above.

In this case, the opening/closing lid 5 is unlocked and opened by the biasing force of the spring, as in the case described above. Also, since the eject actuating plate 31 is released from being pressed by the leaf spring 6 via the cassette, the ejecting plate 31 is rotated clockwise in FIG. reach. Therefore, the cassette is this eject operating plate 31.
Since the cassette is pushed out to a position where it contacts the leaf spring 6 of the opening/closing lid 5, the pushed out cassette can be grasped by hand and taken out. Next, another embodiment of the intermediate lever mechanism will be described with reference to FIG. 12, in which the first intermediate lever 54 is shortened so that its fulcrum pin 65 is
Figures 1 to 11, except that they are provided separately from
It has the same configuration as the first embodiment shown in the figure.

In this case, the second intermediate lever 53 is rotatably supported on the mechanical chassis 2 by a fulcrum pin 52. Also the first
The intermediate lever 54 is rotatably supported on the second intermediate lever 53 by a fulcrum pin 65. Therefore, in the second embodiment shown in FIG. 12, almost the same operation as in the first embodiment is performed, but there is an advantage that the first intermediate lever 54 can be shortened.

Note that in the above embodiment, the pair of pinch levers 45
Although 46 and 46 fulcrums are individually provided, it is also possible to use these as a common fulcrum.

Further, in the above embodiment, the pinch levers 45, 46
Slots 50 and 51 are formed in the actuating lever 47, respectively, and connecting pins 48 and 49 are provided in the actuating lever 47, respectively.

However, on the contrary, the pinch levers 45, 46 may be provided with connecting pins 48, 49, respectively, and the actuating lever 47 may be provided with slots 50, 51, respectively. The forward rotation of the pinch levers 45 and 46 is controlled by the rotation of the tape shift cam pulley 75 and the pinch roller compression plunger 61.
The steps are performed sequentially depending on the operation.

However, various actuation mechanisms may be used instead of these, and at least one of these may be replaced by a mechanism mechanically interlocked with the play button. The present invention is the first
and a second actuating means, the first actuating means moves from the backward movement position to the intermediate forward movement position, and the second actuation means moves the first and second movement from the intermediate forward movement position to the final forward movement position.
The tape shift levers can be rotated forward and backward respectively.

Therefore, the actuation stroke of the first and second tape shift levers by the individual actuation means can be made relatively small, and the forward movement of the first and second tape shift levers by the first actuation means can be made more precisely. There is no need to do so. In addition, in order to rotate the first and second tape shift levers backward from the final forward movement position to the intermediate forward movement & layer, these levers must be forcibly returned against the elastic biasing force of the coil spring as in the past. Since the second actuating means can be brought into a non-operating state without being rotated, fatigue of the coil spring is small and there is no need to generate a large acting force at this time.
Further, the intermediate portions of the first and second tape shift levers and both ends of the connecting lever are connected by first and second engaging means consisting of slots and pins, and the driving member is connected to the intermediate portion of the connecting lever. Installed.

Therefore, when the first and second tape shift levers are moved forward through the drive member and the connecting member by the operation of the second actuating means, the respective forces applied to the tape by the first and second tape shift members are It is possible to equalize the acting forces. Further, when the first tape shift lever is rotated forward by the operation of the first actuating means, this forward rotation is smoothly transmitted to the second tape shift lever via the connecting lever, and the first and second tape shift levers are The connection structure between the tape shift lever 2 and the connection lever is simple and the operation is reliable.
Further, the first actuating means rotates the first tape shift lever forward, and this forward rotation causes the second tape shift lever to rotate forward via the connecting lever, whereas the second actuating means rotates the first tape shift lever forward. The connecting lever is moved forward via the drive member, and the first and second tape shift levers are moved forward by this forward movement.

Therefore, from the intermediate forward movement position to the final forward movement &
It is possible to accurately move the tape shift member forward to the layer, and therefore a highly accurate tape path can be formed at the final forward movement position. Further, two tape shift levers each having a tape shift member attached thereto are provided, and the tape is shifted by rotating these two tape shift levers.

Therefore, a relatively complicated tape shift state can be obtained with a relatively simple structure.

[Brief explanation of drawings]

The drawings show an embodiment in which the present invention is applied to a large cassette type dual capstan type tape recorder, in which FIG. 1 is a front view of the tape recorder in a stopped state, and FIG. 3 is a front view of the tape recorder shown in FIG. 1 in the middle of loading a magnetic tape, and FIG. 4 is a front view of the tape recorder in the pause state.
5 is a front view of the tape recorder shown in FIG. 1 in the playing state, FIG. 6 is a perspective view of the pinch lever shown in FIG. 1, and FIG. 7 is a cam shown in FIG. 1. 8 is a perspective view of the tape shift cam mechanism shown in FIG. 1, FIG. 9 is a perspective view of the reel brake mechanism shown in FIG. 1, and FIG. 10 is an intermediate view of the tape shift cam mechanism shown in FIG. 1. FIG. 11 is a front view of the locking mechanism for the opening/closing lid of the cassette storage space shown in FIG. 2, and FIG. 12 is a front view of another embodiment of the intermediate lever mechanism shown in FIG. 10. be. Regarding the symbols used in the drawings, 12...supply reel stand, 13...take-up reel stand, 41...
- Supply side pinch roller, 42... Winding side pinch roller, 45, 46... Pinch lever, 131...
A capstan on the servicing side, 132...a capstan on the winding side, 145...a head board. Figure 1 Figure 6 Figure 7 Figure 2 Figure 3 Figure 8 Figure 12 Figure 4 Figure 5 Figure 10 Figure 9 Figure 11

Claims (1)

[Claims] 1 (a) first and second tape shift levers each having one end rotatably supported and a first and second tape shift member respectively attached to the other end; (b) these; (c) a connecting lever connecting the first and second tape shift levers to each other; (c) actuating means for rotating the first and second tape shift levers in order to shift the tape to a predetermined state; (d) from a slot and a pin that interconnect intermediate portions of the first and second tape shift levers and both ends of the connection lever; consisting of the first and second
(e) a driving member attached to an intermediate portion of the connecting lever; (f) a first actuating means capable of reciprocally rotating the first tape shift lever; (g) the driving member. and a second actuating means capable of reciprocating the tape shift members, and when the tape is in a backward movement state in which the first and second tape shift members are in the backward movement position, the first and second tape shift members are actuated by the first actuating means. When the first tape shift lever moves forward, this forward movement is transmitted to the second tape shift lever via the connection lever.
As a result, the first and second tape shift levers each rotate forward in a predetermined relationship, and in conjunction with these forward rotations, the first and second tape shift levers rotate in a predetermined relationship.
and the second tape shift member respectively move forward from the backward movement position to an intermediate reciprocating position where the tape cannot yet come into contact with a tape feeding means such as a capstan, thereby shifting the tape to the intermediate forward movement state, and When the drive member moves forward due to the operation of the second actuating means in the tape intermediate forward movement state, this forward movement is transmitted to the first and second tape shift levers via the connection lever. transmitted,
As a result, the first and second tape shift levers each further rotate forward, and in conjunction with these forward rotations, the first and second tape shift members respectively move from the intermediate forward movement position. The tape is configured to be moved forward to a final forward movement position where the tape can be brought into contact with the tape feeding means, thereby shifting the tape to the final forward movement state, whereby the first and second actuating means are activated. When both actuate, the final forward movement state of the tape is obtained, and when only the first actuation means is actuated and the second actuation means is inactive, an intermediate forward movement state of the tape is obtained. A tape shift device in a tape running device configured as follows.