JPS5815864B2 - Cassette type magnetic recording and reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette-type magnetic recording and reproducing device that records or plays back by pulling out a magnetic tape stored in a tape drawer-type tape cassette such as an L cassette. The present invention relates to a magnetic recording and reproducing device equipped with a magnetic tape retracting mechanism capable of reliably retracting a tape.

Recently, a tape pull-out type tape cassette called L-cassette has come into use, which can overcome the drawbacks of conventional tape cassettes.

If this kind of tape pull-out type tape cassette is used, it becomes possible to freely set the tape running path, thereby improving recording and reproducing performance.

By the way, the tape pulled out from the cassette must be drawn into the cassette by some means.

In this case, it is possible to pull in the tape by manually rotating the reel, but it is preferable to pull in the tape automatically, so generally the reel motor continues to drive even after the stop operation to pull in the tape. ing.

Although it is of course possible to pull in the tape in this way, there are disadvantages in that it is difficult to control the reel motor at the right timing, and in that it becomes impossible to pull in the tape when the power is turned off.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a cassette-type magnetic recording/reproducing device equipped with a tape retracting mechanism capable of reliably retracting the tape being pulled out.

To achieve the above object, the present invention will be described with reference to the reference numerals in the drawings showing the embodiments for ease of understanding. 45, a tape-drawing drive body 29 rotatably disposed to rotate the driven body 147, and a tape-drawing drive body 29 coupled to the drive body 45, a rotating plate 15 disposed so as to be parallel to the driving body 29; a power source spring 39 for rotating the rotating plate 15 when drawing the tape;
The drive body 29 is disposed between the rotation plate 15 and the drive body 29 in order to rotate the drive body 29 following the rotation of the rotation plate 15, and the power source spring 39 rotates the drive body 29. and a coil spring 38 formed to expand when the tape drawing is completed by rotating the driven body 47 and the load on the driving body 29 increases. This relates to magnetic recording and reproducing devices.

According to the above invention, since the power source spring 39 is coupled to the driving body 29 via the rotary plate 15 and the coil spring 38, when the tape is finished pulling in and the braking by the tape increases, the power source spring 39 Even if the rotating plate 15 continues to be biased, the coil spring 38 stretches and only the rotating plate 15 continues to rotate, and the rotation of the drive body 29 substantially stops.

Therefore, the drive body 29 does not forcefully continue to rotate after drawing in the tape, thereby preventing damage or cutting of the tape.

Furthermore, due to the difference in the tape winding diameter, there is a difference in the rotation angle of the driven body 47 and the drive body 29 until the tape retraction is completed, but with this device, the rotation of the drive body 29 can be stopped at the point where the tape retraction is completed. Since this is possible, it is possible to reliably draw the tape regardless of the winding diameter.4 Below, one embodiment of the present invention will be described with reference to the drawings.

1 to 11 show a part of a tape deck for recording or reproducing using an L cassette (tape pull-out type cassette) according to an embodiment of the present invention.

First, referring to FIG. 1, a support plate 2 is fixedly protruding from a metal substrate 1 at right angles, and a cassette holder 4 is pivotally attached thereto by a pivot 3. As shown in FIG.

Since a spring 7 is engaged with the leg portion 6 of the side plate 5 of the cassette holder 4, the holder 4 is subjected to a biasing force in the clockwise direction (holder opening direction) in FIG.

Of course, the spring bias for opening the holder 4 may be performed by a torsion coil spring attached to the shaft 3 or the like.

A locking plate 8 is rotatably coupled to the side plate 5 of the holder 4, and this locking plate 8 allows the tape cassette to be moved between the tape cassette attachment/detachment position (holder open position) shown in FIG. 1 and the tape running position shown in FIG. The possible position (holder closed position) is determined and φ.

That is, this locking plate 8 has a cutout recess 9 and a protrusion 10 as shown in an enlarged view in FIG. 3, and is inserted into the opening 11 of the base plate 1 shown in FIG. In the holder open position shown in FIG. At this position, the board 1 is inserted into the recess 9 of the locking plate, and the locking plate 8 and the holder 4 are positioned.

Note that simply inserting the locking plate 8 into the opening 11 makes it impossible to engage and disengage the board 1 and the locking plate recess 9, so this is done with the help of the locking rotating plate 12. There is.

The locking rotary plate 12 not only locks the locking plate 8 in the holder closed position as described above, but also rotates the tape to obtain the stop or pause state shown in FIGS. 6 to 11. It also has a function of locking the preparation sliding plate 13 in a non-operating position corresponding to opening of the holder.

As is particularly clear from FIGS. 1 and 2, this locking rotating plate 12 is provided with a rising portion 14, and this rising portion 14 and a falling portion fixed to a control rotating plate 15 having various functions. A coil spring 17 is disposed between the pin 16 and the pin 16 .

The locking rotating plate 12 is supported by a pivot 18 as shown in FIGS. 6 to 11.

Therefore, a counterclockwise biasing force is applied to this locking rotating plate 12 in FIGS. 6 to 11.

However, when the control rotating plate 15 is in the cassette ejection position (holder open position) as shown in FIGS. 1 and 6, only zero or extremely weak biasing force is applied to the locking rotating plate 12 by the spring 17. Therefore, the locking plate 8 can move relatively freely.

However, when the control rotating plate 15 is in the stop or pause position and recording/playing position (holder closed position) shown in FIGS. 2, 7, and 8, the falling pin 16 separates from the locking rotating plate 12. , the counterclockwise spring bias against the locking rotating plate 12 becomes stronger, pressing the locking plate 8 downward and maintaining the state in which the board 1 is inserted into the locking plate recess 9.

Of course, one end of the coil bar ice 17 may be directly locked to the board 1 without being locked to the falling pin 16 of the control rotating plate 15, but in order to smoothly move the cassette holder 4, the control rotating plate 15 is desirable.

Since the locking rotation plate 12 is provided with an opening 19 and the locking plate 8 is inserted therein, the locking plate 8 can be locked by the locking rotation plate 12.

Figure 6 shows the injected state (holder open state), so
The locking plate 8 is not restricted by the locking rotating plate 12 and can freely move up and down, but in the stopped or paused state shown in FIG. 7 and in the play state shown in FIG. Even if 8 tries to move upward, that is, in the unlocking direction in which the four parts 9 separate from the substrate 1, it is restricted by the edge of the opening 19 and cannot be moved.

Therefore, the eject state will not occur inadvertently.

In FIG. 6, a roller 21 disposed on the tape running preparation sliding plate 13 is engaged with a lock portion 20 consisting of a recessed portion provided at the upper left of the locking rotary plate 12. .

Since FIG. 6 shows the ejected state, the engagement between the lock part 20 and the roller 21 is established, but in FIGS. 1 and 8, the holder 4 moves to the holder closed position, and the Since the locking rotating plate 12 is rotating counterclockwise,
It is in unlocked state.

Incidentally, the rising portion 14 of the locking rotating plate 12 is pressed by one end 22 of the control rotating plate 15 when the locking plate 8 is unlocked.
The state shown in FIG. 0 changes to the state shown in FIG. 12.

As is clear from FIGS. 1 and 2, the legs 6 of the holder are provided with U-shaped grooves 23, in which the pins of the connecting plate 24 are inserted.
5 has been inserted.

Therefore, the connecting plate 24 slides following the rotation of the cassette holder 4.

In the eject state shown in FIGS. 1 and 6, the cassette holder 4 is opened by the holder rotation spring 7, so the connecting plate 24 is pushed upward;
When the cassette holder 4 shown in FIGS. 7 and 8 is closed, the connecting plate 24 is pushed down by the holder legs 6. As shown in FIGS.

A pin 26 is implanted at the upper end of the connecting plate 24 engaged with the holder 4 in this manner, and a torsion spring 28 is disposed between this pin 26 and a pin 27 fixed to the substrate 1.

The pin 26 of the connecting plate 24 also engages with the control rotation plate 15 and the tape retraction drive body 29.

As is most clearly seen in FIG. 5, the control rotation plate 15 includes, in addition to the pin 16 described above, a through hole 30, an arcuate groove 31, a lateral groove 32 protruding from the arcuate groove 31 at a substantially right angle, and a pin 3.
3 and spring locking protrusions 34 and 35 are provided.

Since the pin 2T is inserted into the through hole 30, the control rotation plate 15 can rotate around the pin 21.

The arcuate groove 31 is a groove for allowing the drive body 29 to rotate without being restricted by the pin 26 during tape retraction, as shown in FIGS. 9, 10 and 11.

A lateral groove 32 continuous with the arcuate groove 31 is provided with a pin 26 as shown in FIGS.
This is the part into which the drive body 29 is inserted, and is the part that prevents the drive body 29 from rotating.

The pin 33 is inserted into a predetermined pattern of openings 36 formed in the drive plate 29 to establish engagement between the control rotation plate 15 and the drive body 29 and prevent the drive body 29 from rotating clockwise.

Since a coil spring 38 is disposed between the protrusion 34 of the control rotation plate 15 and the protrusion 37 of the driver 29, the two are also coupled together by this spring 38.

Further, as is clear from FIGS. 6 to 11, since an energy storage spring 39 is disposed between the protrusion 35 and the support plate 2, the control rotation plate 15 is biased clockwise by the spring 39. has been done.

Note that the fact that the control rotary plate 15 is biased by the spring 39 means that the driver 29 is also biased by the spring 39.

In addition to the above-mentioned opening 36, the drive body 29 is provided with a long hole 40 that allows the drive body 29 to move in the lateral direction.
7 has been inserted.

Therefore, the driving body 29 is movable in the left-right direction and also rotatable about the pin 27 as a pivot.

However, when the pin 26 is inserted into the horizontal groove 32 of the control rotation plate 15, the drive body 29 cannot be rotated.

Since the pin 26 of the connecting plate 24 and the pin 33 of the control rotating plate 15 are inserted into the opening 36 of the driving body 29, the driving body 29 moves under the constraints of both.

As best seen in FIG.
has an arc-shaped opening edge 41 corresponding to the arc-shaped groove 31 of the control rotation plate 15, and the drive body is moved with the pin 26 along this opening edge 41 as shown in FIGS. 9 to 11. 29 rotates.

Further, the pin 33 of the control rotation plate 15 is in contact with the linear opening edge 42 shown in FIG. 5, and serves as a guide when the drive body 29 moves rightward.

Therefore, the linear opening edge 42 extends in substantially the same direction as the elongated hole 40.

The pin 33 also serves to rotate the drive body 29 counterclockwise following the counterclockwise rotation of the control rotation plate 15.

The drive body 29 has an arcuate outer circumferential surface 43 with teeth to act as a tape retraction gear.

A tape supply side reel shaft 45 of a pair of reel shafts 45 and 46 that engages with the reel of the L cassette 44 shown by the chain line.
A driven body 47 consisting of a small gear is coupled to the drive body 47 .

In this device, the tape runs from the left reel shaft 45 to the right reel shaft 46 during recording or playback, but the cassette 44
Conversely, the tape pulled out from the tape is wound onto a supply reel (left reel) by counterclockwise rotation of the driven member 47.

Note that the rotation of the driven body 47 in the counterclockwise direction is performed by the driving body 29 that rotates clockwise in conjunction with the ejecting operation.

The tape running preparation sliding plate 13, which is partially exposed through the opening 11 of the substrate 1 in FIG. energized.

Therefore, when the roller 21 is removed from the lock part 20, the seventh
As shown in the drawings and FIG. 8, it moves to the right while being guided by the guide pin 49, and becomes ready to run the tape.

That is, the protrusion 50 of the sliding plate 13 is connected to the pinch roller arm 51.
Since the sliding plate 13 is provided adjacent to the pin 52 of
moves to the right, the protrusion 50 closes the opening 60 of the substrate 1.
, the pinch roller arm 51 is rotated a predetermined amount in the counterclockwise direction about the pivot shaft 53, and the tape pull-out pin 55 provided adjacent to the pinch roller 54 is magnetically Tape 56 is pulled out to the stop or pause position of FIG.

Although not shown in FIGS. 6 to 8, the cassette 4
A lid is provided to close off the four parts 57 of the tape 56, and the lid is opened by the pinch roller arm 51 and the tape 56 is pulled out.

Since FIG. 7 shows a stopped or paused state, the pinch roller 54 is not in rolling contact with the capstan 58 yet.

Since the coil spring 59 is locked to the pinch roller arm 51, the pinch roller arm 51 receives a clockwise biasing force and rotates against this return spring bias.

A pin 61 is implanted at the other end of the pinch roller arm 51, and is inserted into a long hole 63 of the connecting rotation plate 62.

Therefore, when the pinch roller arm 51 rotates to the pose position shown in FIG. 7, the articulated rotation plate 62 rotates clockwise about the pivot shaft 64.

An engagement pin 65 is provided at the left end of the articulated rotating plate 62, and this engages the opening 67 of the tape drawer/tension arm 66.
It is inserted into the tension arm 66 and acts like a stopper for the tension arm 66.

Therefore, when the articulated rotating plate 62 rotates, the tension arm 66 also rotates following this rotation under the bias of the spring 68, and the pin 69 provided at the tip of the tension arm 66 pulls out the tape 56 to the pose position. , the state shown in FIG. 7' is reached.

In this case, the pin 65, like the pin 55 of the pinch roller arm, opens a lid (not shown) that closes the recess 70 of the L-cassette 44.

The tension arm 66 is attached to the base plate 1 by a pivot shaft 71, and is biased counterclockwise by a coil spring 68 via a connecting rod 72.

73 in Figures 6 to 11 is for back tension.

It is a braking body and comes into contact with the control drum 74 connected to the supply side reel shaft 45 during -pause and recording/reproduction.

T5 is the axis of the brake body 73. As is clear from FIGS. 6 to 11, the spring 68 is locked to the pin 76 of the brake body 73, so it functions as a spring for providing back chin-jotion and also as a spring for rotating the tension arm 66. As a result, the braking body 73 and the tension arm 66 operate in a coordinated manner.

An electromagnetic plunger 77 for play is provided on the lower side of the board 1 as shown by dotted lines in FIGS. 6 to 8, and an L-shaped rotating plate 73 is further provided to engage with a pin 77a of the plunger. ing.

The L-shaped rotating plate 78 is rotatable about a pivot 79 and is connected to the pinch roller arm 51 and the connecting rotating plate 62 by a pin 80 that is implanted at the other end and protrudes from an opening 81 in the base plate 1. engage.

Therefore, if the electromagnetic plunger 77 is energized in the pose state shown in FIG. As shown in the figure, the pinch roller 5 is attached to the capstan 58.
4 is transposed.

The connecting rotating plate 62 also rotates slightly clockwise, and the eighth
As shown in the figure, the tension arm 66 is no longer restricted by the pin 65.

Furthermore, magnetic heads 82, 83 and 84 for erasing, recording and reproducing
is already in contact with the magnetic tape 56 in the pause state shown in FIG.

The eject sliding plate 85, a part of which is shown in FIGS. 1 and 2 and indicated by chain lines in FIGS. It is arranged to slide on the connecting plate 24 and the lever 91, and is biased downward in FIG. 6 by a spring 88.

This sliding plate 85 has an engagement roller 89 and an engagement slope 90, and engages with a return lever 91 and pin 26 at the time of ejection as shown in FIGS. 9 and 10.

That is, when the sliding plate 85 is slid upward as shown in FIG. 9 by the eject operation, the engaging slope 90 gradually presses the pin 26 in the right direction in the drawing, causing the pin 26 to move to the fifth position.
It is formed so that it can be removed from the groove portion 32 of the control rotation plate 15 shown in the figure.

Further, the engagement roller 89 presses the inclined surface 92 of the lever 91 when the eject slide plate 85 is slid upward, and rotates the lever 91 clockwise about the guide pin 86.

As a result, the other end 93 of the lever presses the roller 21 to the left, and the tape running preparation sliding plate 13 moves to the left.
After ejection, the roller 21 enters into the lock portion 20.

Although illustration is omitted in FIGS. 6 to 11 to simplify the drawings, an electromagnetic plunger is coupled to the sliding plate 13 for moving it to the left. During fast forwarding or rewinding, this electromagnetic plunger is energized so that the pinch roller 54, tape 56, etc. are in the state shown in FIG. 6.

Next, the operation in each mode will be explained.

First, to describe the operation when the cassette holder is closed, the L cassette 44 is inserted into the cassette holder 4 in the state shown in FIG. 1, and from the holder open state shown in FIGS. To bring the holder into the closed state shown in the figure, hold the holder 4.
Press the top surface with your hand.

As a result, the holder 4 is easily rotated, the substrate 1 enters the recess 9 of the locking plate 8, and the holder 4 is locked at the tape-travelable cassette position shown in FIG.

Further, in conjunction with the rotation of this holder, the power switch is turned on and the capstan motor begins to rotate.

Also, at the same time as this holder 4 rotates, the connecting plate 24
Since the pin 26 is engaged with the groove 32 of the control rotation plate 15, the control rotation plate 15 rotates counterclockwise in FIG. 6, and finally the seventh It will be in the state shown in the figure.

When the control rotating plate 15 rotates from FIG. 6 to FIG. 7, the spring 39 stretches and energy is stored in the spring 39.
Further, since the pin 33 presses the opening edge 42 of the drive body 29, the drive body 29 also rotates counterclockwise following the control rotation plate 15 to the position shown in FIG.

The pin 26 is inserted into the groove 32 even in the position shown in FIG. 7, and the pin 26 is pressed leftward in FIG. 7 by the spring 28, and the pin 26 presses the driver 29 leftward. Therefore, the rotation and rightward movement of the driver 29 and the rotation of the control rotation plate 15 are prevented, and the energy storage state of the spring 39 is maintained.

This completes the tape pull-in preparation.

When the cassette holder 4 is rotated, the energy for drawing the tape is stored in the spring 39 as described above, and at the same time, the locking rotating plate 12 is moved by the spring 17 due to the engagement of the concave portion 9 of the locking plate 8 with the base plate 1. can be rotated counterclockwise, that is, can be rotated by the depth of the recess 9,
The engagement between the lock portion 20 and the roller 21 is released, and the sliding plate 13 is moved to the right in FIG. 6 by the spring 48.

As a result, the pinch roller arm 51 as shown in FIG.
rotates counterclockwise, the connecting rotary plate 62 rotates clockwise, the tension arm 66 rotates counterclockwise by the spring 68, and the back tension braking body 73 rotates against the brake drum 74. , and the stopped or paused state shown in FIG. 7 is obtained.

That is, although the magnetic tape 56 is in contact with the heads 82, 83, and 84, the pinch roller 54 does not roll into contact with the capstan 58, so that a state in which the tape does not run is obtained.

In this device, when the holder 4 is closed, the tape is automatically pulled out and the state shown in FIG. 7 is reached, so that FIG. 7 is both a pause state and a stopped state.

When the play switch (not shown) is operated in the stopped or paused state shown in FIG. Rotate clockwise to remove capstan 5.
8 is pressed by the pinch roller 54.

At the same time, the articulated rotating plate 62 rotates clockwise, and the tension arm 66 is no longer restricted by the pin 65.

That is, the state shown in FIG. 8 is reached.

As a result, the tape 56 runs from left to right, and recording or reproduction is performed.

If a pause switch (not shown) is operated in the recording or playback state shown in FIG. 8, the electromagnetic plunger 77 is deenergized, mechanically returning to the state shown in FIG. 7, and only the electric circuit is paused. state.

If the pause switch is operated with the holder 4 closed, the mechanical state shown in FIG. 7 is maintained as it is, and only the electric circuit is placed in the pause state (recording standby state).

When starting recording from these pause states, a play switch (not shown) is operated to activate the electromagnetic plunger 77, resulting in the state shown in FIG.

Stop switch (not shown) in the recording or playback state as shown in Figure 8
When the electromagnetic plunger 77 is operated, the electromagnetic plunger 77 is deenergized and the state shown in FIG. 7 is achieved.

That is, the pinch roller arm 51 is rotated clockwise by the spring 59, the pinch roller 54 is separated from the capstan, and the articulated rotation plate 62 is rotated counterclockwise.

At this time, the tension arm 66 does not rotate.

This results in the stopped state shown in FIG.

If the fast forward or rewind switch (not shown) is operated in the recording or reproducing state shown in FIG. 8, the electromagnetic plunger 77 is deenergized and becomes the stopped state shown in FIG. The electromagnetic plunger for high-speed feeding, which cannot be rotated, is energized and enters a high-speed feeding state.

If you operate the high-speed feed switch in the stopped state shown in Fig. 7, the pause state after a pause operation, or the recording/playback state, in either case, mechanically, after the state shown in Fig. 7 is reached, the high-speed feed The electromagnetic plunger is energized, the sliding plate 13 moves to the left against the spring 48, the pressure on the pinch roller arm 51 by the projection 50 is released, the arm 51 rotates clockwise, and the cassette is released. The pinch roller 54 is accommodated in the recess 57.

Further, the articulated rotating plate 62 rotates counterclockwise in conjunction with the arm 51, and is pressed by the pin 65, causing the tension arm 66 to rotate.
rotates clockwise, and the pin 69 of the tension arm 66
fits into the recess 70.

Also, following the rotation of the tension arm 66, the braking body 73
rotates away from the drum 74.

As a result, the tape traveler enters the state shown in FIG. 6, and thereafter the supply side reel shaft 45 or the take-up side reel shaft 46 is rotated at high speed by the motor.

Therefore, high-speed feeding is performed without the tape 56 being pulled out from the cassette 44, and the tape runs extremely smoothly with little resistance.

When the stop switch is operated in the fast forwarding or rewinding state, the high speed electromagnetic plunger (not shown) is deenergized, and the sliding plate 13 is moved to the right in FIG. 6 by the spring 48.
As a result, the pinch roller arm 51 rotates counterclockwise, the rotation plate 62 rotates clockwise, the tension arm 66 rotates counterclockwise, and the brake body 73 rotates against the drum 74.
7, and each comes into a stopped state as shown in FIG.

In addition, if a play switch (not shown) is operated in the high-speed feed state, the high-speed feed electromagnetic plunger is de-energized and becomes the state shown in Fig. 7, and then the play electromagnetic plunger TI is energized to become the play state shown in Fig. 8. Become.

If a pause switch (not shown) is operated in a high-speed feeding state, the electromagnetic plunger for high-speed feeding is deenergized, mechanically entering the state shown in FIG. 7, and electrically forming a pause circuit.

Since this device is configured so that it can be ejected only when it is stopped, the eject operation (cassette ejection operation) is performed when the device is mechanically in the state shown in FIG. 7.

If the eject sliding plate 85 is moved upward against the return spring 88 by the eject operation in the stopped state shown in FIG.
The engagement roller 89 presses the inclined surface 92 of the lever 91, and the lever 91 rotates clockwise.

As a result, the roller 21 is pressed by the other end of the lever 91, the sliding plate 13 moves to the left in FIG. rotation, clockwise rotation of the tension arm 66, and clockwise rotation of the brake body 73, respectively.
It will be in the state shown in the figure.

When the eject operation is performed, another operation occurs in addition to the above-mentioned operation.

That is, when the eject sliding plate 85 moves upward, the slope 90 of the sliding plate 85 presses the pin 26 approximately to the right in FIG.

In FIG. 7, the pin 26 enters into the groove 32 of the control rotation plate 15 to keep the control rotation plate 15 and the driver 29 in a blocking state, but the pin 26 is pushed out of the groove 32 by the slope 90. The connecting plate 24 is slightly rotated clockwise against the spring 28 so that it comes out, and the state shown in FIG. 9 is reached.

At the same time, the driving body 29, which had been blocked by the pin 26 of the groove 32, moves toward the driven body (approximately to the right) by an amount corresponding to the amount of movement of the pin 26, and the driving body 29 consisting of a gear and the gear The driven body 47 consisting of the two is in mesh with each other.

The driving body 29 is guided by the pin 27 inserted into the elongated hole 40 and the pin 33 in contact with the opening edge 42 to move laterally.

Therefore, the drive body 29 does not rotate while the pins 27 and 33 act as guide bodies.

As shown in FIG. 9, when the pin 26 is disengaged from the horizontal groove 32 of the control rotation plate 15, the clockwise rotation of the control rotation plate 15 is no longer blocked by the pin 26. is rotated clockwise by the energy storage spring 39, resulting in the state shown in FIG.

At the same time, the driver 29, which is connected to the control rotation plate 15 by the spring 38, rotates clockwise while being pulled by the spring 38.

At this time, the pin 33 continues to rotate while contacting the opening edge 42, and the control rotation plate 15 and the driver 29 rotate substantially together.

When the teeth of the driving body 29 and the teeth of the driven body 47 mesh with each other and the driving body 29 rotates clockwise, the driven body 47 rotates counterclockwise, and the reel shaft 45 also rotates counterclockwise. Rotate.

As a result, the drawn-out tape 56 is wound onto the supply reel (left reel) and drawn into the cassette 44, as shown in FIG.

In this device, only the take-up reel is braked by the stop operation, so the supply reel shaft 4
Even if the tape is wound onto the left reel in rotation 5, the right reel will not follow.

Also, since the tape is pulled out from the supply side (left) reel while the take-up side (right) reel is braked, the heads 82, 83
, 84 before the tape is pulled in and the tape position after the tape is pulled out.

When the tape retraction by the supply reel is completed, the left reel and reel shaft 45 are braked by the tape 56, and the driven body 47 no longer rotates.

Therefore, rotation of the drive body 29 is also prevented, and for example, the first drive body 29 is prevented from rotating.
The rotation of the driving body 29 stops at the position shown in FIG.

However, since the driving body 29 and the control rotating plate 15 are connected by a spring 38, and the opening 36 is shaped to allow the pin 33 to move clockwise, the control rotating plate 15 is connected to the spring 38. accumulation.

It continues to rotate due to the release of energy, resulting in the state shown in FIG. 11.

At this time, since the driving body 29 does not rotate, the spring 38 is extended and a part of the energy of the spring 39 is transferred thereto.

When the rotation of the control rotation plate 15 progresses as described above, the control is activated.

The left end of the side opening moving plate 15 pushes up the locking rotating plate 12 as shown in FIG. 11, and as a result, the locking plate 8 of the holder is also pushed up, and the recess 9 of the locking plate 8 separates from the base plate 1. The cassette holder 4 starts rotating in the opening direction shown in FIG. 1 by the spring 7.

Mouth again. Since the turning plate 12 for locking rotates clockwise and the sliding plate 13 moves to the left as described above, the recessed lock portion 20 and the roller 21 are engaged with each other, and the sliding plate 1
3 is locked in the position shown in FIG.

When the locking plate 8 is pushed up by the clockwise rotation of the locking rotating plate 12 and the lock by the recess 9 is released, the holder 4 is rotated clockwise by the spring 7 as shown in FIG. becomes open.

At the same time, following the rotation of the holder 4, the connecting plate 24, which engages with the holder 4 with the pin 25, starts moving toward the position shown in FIGS. 1 and 6.

Further, when the holder 4 starts rotating in the opening direction, the reel hub of the cassette separates from the reel shafts 45 and 46.

When the reel hub is detached from the reel shafts 45 and 46 in this way, the reel shaft 45 is no longer braked by the tape 56, so the reel shaft 45 can rotate, and the spring 38
The driving body 29 is further rotated clockwise.

That is, the driving body 29 further rotates clockwise from the state shown in FIG. 11.

When the driving body 29 rotates, the driven body 47 and the reel shaft 4
5 also rotates, but this rotation is unrelated to the winding of the tape.

At the same time as this rotation, the pin 26 moves upward in the arcuate structure 31, and reaches the upper end of the groove 31, that is, the entrance of the groove 32, after the rotation of the drive body 29 is completed.

When the pin 26 reaches the upper end of the groove 31, the upward movement of the pin 26 is restricted, but the leftward movement becomes possible, and the spring 28 causes the pin 26 to move leftward along the groove 32. Since the pin 26 is engaged with the edge of the opening 36 of the driver 29, the driver 29 also moves to the left together with the pin 26, resulting in the state shown in FIG.

As a result, the driving body is separated from the driven body 47, and the pin 26 enters the groove 32, so that the movement of the driving body 29 and the control rotation plate 15 is locked.

Further, in conjunction with the rotation of the holder 4 described above, the power switch is turned off, the rotation of the motor is stopped, and the rotation of the capstan 58 is also stopped.

Note that the rotation of the cassette holder 4 is restricted at the position where the protrusion 10 of the locking plate 8 engages with the substrate 1.

In this device, it is of course possible to hold the eject operation, that is, the operation of moving the eject sliding plate 85 upward until the ejection is completed, but if the operation is continued until the pin 26 is disengaged from the groove 32, it is possible to remove the tape. The retraction is complete.

Further, since the roller 21 moved leftward by the lever 91 is almost held at the moved position due to the delay, it engages with the rotating plate 12, locking the sliding plate 13, and ejecting the cassette. will also be done.

However, if the ejecting operation is stopped before the pin 26 leaves the groove 32, the state returns to the stop mode before the ejecting operation.

Furthermore, if you try to close the cassette holder 4 by rotating it counterclockwise in FIG. 1 while the eject operation as shown in FIG. , the locking plate 8 enters into the substrate 1.

On the other hand, the connecting plate 24 moves downward, and the control rotating plate 15 and the driver 29, which are engaged by the pin 26, start rotating counterclockwise.

The slope 90 of the sliding body 85 contacts the pin 26 and moves the pin 26 in a direction away from the groove 32.

When the pin 26 is completely removed from the groove 32, the counterclockwise rotation of the control rotation plate 15 and the driver 29 is completed.

Since the driving body 29 and the driven body 47 are engaged when the pin 26 leaves the groove 32, the spring 39 prevents the control rotation plate 15 and the driving body 29 from rotating clockwise after the pin 26 leaves the groove 32. The driven body 47 is rotated counterclockwise.

Furthermore, the locking rotating plate 12 is pushed up by the clockwise rotation of the control rotating plate 15.

Since the operation up to this point is completed instantaneously, the rotation of the holder 4 causes the locking plate 8 to gradually enter into the board 1 and the recess 9 to close the board 1.
The rising portion 14 of the locking rotary plate 12 is located in the part of the substrate that engages with the recess 9 before reaching the recess 9 , and the engagement between the recess 9 and the substrate 1 is impossible.

Therefore, when the pressure on the cassette holder 4 is released, the holder 4
is opened again by spring 7.

The connecting plate 24 moves in the direction in conjunction with the opening of the holder, the pin 26 also moves along the groove 31, and when it reaches the entrance of the groove 32, the pin 26 enters the groove 32 by the spring 28 and is covered at the same time. The driver 29 is separated from the driver 47.

Therefore, even if you mistakenly try to close the cassette holder 4 while the eject operation is still being performed, the cassette holder 4 cannot be closed.

In order to close the holder 4, it is necessary to release the eject operation and press down the sliding plate 85.

As is clear from the above, according to the cassette type magnetic recording and reproducing apparatus according to the present invention, the driving body 29 and the control rotating plate 15 are coupled by the spring 38, and the force of the spring 39 is directly applied to the driving body 2.
9, when the tape retraction is completed, the drive body 29 stops rotating due to the brake applied by the tape, and only the control rotating plate 15 continues to rotate.

Therefore, there is no risk of damage to the tape due to excessive force being applied to the tape after the tape has been drawn.

If the drive body 29 were to always rotate at a constant angle, the amount of tape drawn in would differ depending on the diameter of the tape on the reel, resulting in insufficient tape drawing or excessive force on the tape. However, such problems do not occur with this device.

Further, in the device of this embodiment, the control rotating plate 15 is connected to the drive body 29.
Since it continues to rotate clockwise without being restricted by this, the locking rotating plate 12 can be reliably rotated at a predetermined time point.

Also, since the control rotation plate 15 is provided, which can start ejection reliably, the lateral movement and rotation of the drive body 29 can be performed accurately and smoothly.

Furthermore, in the apparatus of this embodiment, the take-up reel is braked when the holder is stopped, the tape is drawn into the supply reel, and the tape is pulled out from the supply reel when the holder is closed. The tape position relative to 84 can be matched before and after retraction.

Further, in this apparatus, the tape retracting mechanism includes a driven body 47, a driving body 29, pins 27 and 33 that act as guide bodies, a spring 38 that acts as a biasing device for the driving body 29, and a driving body 29.
A pin 26 and a spring 2 act as a movement and rotation prevention device.
8 and the pin 33, the tape can be pulled in by simply releasing the blocking of the drive body 29 by the blocking device made of the pin 26, etc., and the tape can be pulled in automatically without continuing the tape pulling operation 1. The tape can be pulled into the cassette.

Therefore, operability is improved.

Also, if the blockage by a blocking device such as the pin 26 is released,
Since there is one device that allows the tape to be pulled in, it is possible to freely select the point at which the tape is pulled in, making it possible to pull in the tape at an optimal point.

- Also, since the tape is drawn in by rotating the driving body 29, the device can be made smaller compared to a device in which the tape is drawn in by direct movement.

In addition, in the apparatus of this embodiment, the locking rotating plate 12 is rotated by the control rotating plate 15 that constitutes the tape retracting mechanism.
Since the locking plate 8 is unlocked, the tape can be reliably drawn in and ejected in an orderly manner.

That is, after the magnetic tape has been completely drawn in, the cassette can be ejected even during the drawing process at a point where no problem occurs.

Therefore, problems such as tape damage and cassette damage do not occur.

Further, by associating the tape retracting mechanism with the ejecting mechanism as described above, it is possible not only to use a single operating section such as an operating lever, but also to shorten the stroke of the operating section.

That is, compared to a configuration in which the tape is pulled in with the first stage operation and ejected with the second stage operation, the tape can be pulled in and ejected with a single stage operation, resulting in a shorter stroke.

Furthermore, in the apparatus of this embodiment, an energy storage spring 39 is provided, and energy is stored in the spring 39 by the movement when the holder 4 is moved from a position where a cassette can be attached and removed (holder open position) to a position where tape can be run (holder closed position). However, since the energy stored in the spring 39 is used as a power source to operate the drive body 29, driven body 47, etc. which function as a tape pull-in reel rotation mechanism, the tape pull-in operation can be performed extremely easily.

In other words, the tape is not drawn in by force of operation, but by the stored energy, improving operability.

Note that energy must be stored in the spring 39 when the holder is closed, but since the holder 4 is larger than the operation button, it is difficult to set the point of action for energy storage at a mechanically advantageous point. Therefore, the movement of the holder does not become so heavy due to the energy storage of the spring 39.

Furthermore, in the device of this embodiment, the tape 56 is pulled out to the stop or pause position when the holder 4 is closed, and the tape is pulled into the cassette when the holder 4 is opened, so recording or playback can be performed quickly. It becomes possible to start.

Furthermore, since the tape is maintained in a state where it is pulled out from the cassette in modes other than the high-speed feed mode, mode switching can be performed quickly.

Additionally, the number of times the tape must be withdrawn and retracted is reduced, resulting in less deterioration of the magnetic tape and the withdrawing and retracting mechanism.

In addition, the apparatus of this embodiment is in a high-speed feeding state at the tape position and pinch roller position shown in FIG. 6, and is in a stopped or paused state at the tape position and pinch roller position shown in FIG.
Since the recording or playback state is set at the tape position and pinch roller position shown in Figure 8, the magnetic tape runs within the cassette during high-speed feeding, the running resistance is minimal, and the life of the magnetic tape and the motor that is the drive source are maintained. It is possible to increase the length of the magnetic head, and to minimize wear and tear on the magnetic head.

Furthermore, since the position of the pinch roller 54 is the same in the stop mode and the pause mode, the mechanism for operating the pinch roller can be simplified.

Furthermore, high-speed feeding can be achieved without providing a special tape shifter or the like.

Furthermore, when the pinch roller is set at a stop position within the tape cassette, the magnetic tape must be pulled in each time the magnetic tape is stopped to remove slack, but this is not necessary with this apparatus.

Also, when recording or playing from a stopped or paused state,
Operation is easy because the pinch roller is moved from a position close to the capstan.

Further, when the pinch roller is brought into contact with the capstan, the magnetic tape does not bounce.

[Brief explanation of drawings]

1 to 11 show a cassette-type magnetic recording/reproducing device according to an embodiment of the present invention, FIG. 1 is a side view showing a part of the device with the holder open, and FIG. 2 is a side view showing a part of the device with the holder open. A side view showing a part of the device in the closed state, Fig. 3 is an enlarged perspective view showing the locking plate, Fig. 4 is a perspective view showing the connecting plate, and Fig. 5 shows the drive body, control rotation plate, and connecting plate. 6 is a front view showing the device in the ejected state, FIG. 7 is a front view showing the device in the stopped or paused state, and FIG. 8 is a front view showing the device in the recording or playback state. , FIG. 9, FIG. 10, and FIG. 11 are front views sequentially showing the states of the device during the ejection process. In addition, in the reference numerals used in the drawings, 1 is the board, 4 is the cassette holder, 6 is the leg, 7 is the spring, 8 is the locking plate, and 9
10 is a concave portion, 10 is a protrusion, 12 is a rotating plate for locking, 13 is a sliding plate for tape running preparation, 15 is a control rotating plate, 17 is a coil spring, 20 is a locking portion, 21 is a roller, and 24 is a connecting plate , 26 and 27 are pins, 28 is a spring, 29 is a tape retracting drive body, 31 is an arcuate groove, 32 is a lateral groove,
33 is a pin, 38 is a coil spring, 39 is an energy storage spring, 40 is a long hole, 44 is a cassette, 4T is a driven body, 5
1 is a pinch roller arm, 54 is a pinch roller, 55 is a pull-out pin, 56 is a magnetic tape, 58 is a capstan, 77 is an electromagnetic plunger, 85 is an eject sliding plate, 8
9 is an engagement roller, 90 is an engagement slope, and 91 is a return lever.

Claims (1)

[Scope of Claims] 1. A tape retracting driven body 47 coupled to a reel shaft 45 in order to pull the magnetic tape being pulled out into a reel, and a tape retracting driven body 47 rotatable to rotate the driven body 47. A drive body 29 for drawing in the tape is disposed, a rotary plate 15 is disposed parallel to the drive body 29 in the axial direction of the drive body 29, and a rotary plate 15 is disposed so as to be parallel to the drive body 29 in the axial direction of the drive body 29;
5, and a power source spring 39 disposed between the rotating plate 15 and the driving body 29 to rotate the driving body 29 following the rotation of the rotating plate 15. and is formed to extend when the cape is finished being retracted and the load on the drive body 29 becomes large by rotating the drive body 29 and the sheep drive body 47 with the power source spring 39. A cassette-type magnetic recording and reproducing device equipped with a tape retracting mechanism consisting of a coil spring 38 and a coil spring 38. 2. The magnetic recording and reproducing apparatus according to claim 1, wherein the driven body 47 and the driving body 29 are each gears.