JPS5831660B2 - Tape recorder operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder operating device for operating a magnetic head and a pinch roller toward and away from a magnetic tape of a tape cassette.

A conventional operating device of this type is constructed as shown in FIG.

That is, in the figure, numerals 1 and 2 are a head support lever and a pinch roller support lever, respectively, which are provided coaxially and rotatably with each other.

A magnetic head 3 is attached to the head support lever 1, and a pinch roller 4 is attached to the pinch roller support lever 2, and both support levers 1 and 2 are elastically integrated via a deployment spring 5.

Further, a return spring 6 is stretched between the head support lever 1 and a fixed substrate (not shown), and the return spring 6 allows the support levers 1 and 2 to move the magnetic head 3 and pinch roller 4 to the magnetic tape 7. It is held at a distance from the

In the figure, reference numeral 8 denotes a rotatably provided operating lever, and the operating lever 8 is rotated by manually operating an operating button (not shown).

A follow-up spring 9 is stretched between the operation lever 8 and the head support lever 1 to cause the support levers 1 and 2 to follow the operation lever 8.

Therefore, when the operating button is operated in the state shown in FIG. 1a, in which the magnetic head 3 and the pinch roller 4 are separated from the magnetic tape 7 of the cassette, and the operating lever 8 is rotated clockwise in the figure, this The head support lever 1 and the pinch roller support lever 2 rotate integrally following the rotational movement of the operating lever 8, and the magnetic head 3 and the pinch roller 4 attached to the head support lever 1 and the pinch roller support lever 2 rotate. contacts the magnetic tape 7 as shown in FIG.

At this time, even after the pinch roller 4 comes into contact with the capstan shaft 10 via the magnetic tape 7 and stops, the head support lever 1 further rotates by the required amount against the deployment spring 5, and as a result, the pinch roller 4 is strongly pressed against the capstan shaft 10 by the elastic force of the deployment spring 5, and the magnetic tape 7 is held between the capstan shaft 10 and the pinch roller 4, and the magnetic tape 7 is applied to the rotational force of the capstan shaft 10. is sent out in a certain direction.

By the way, with such a configuration, there is a spring (deployment spring 5) for integrating the head support lever 1 and the pinch roller support lever 2, and a spring for separating the magnetic head 3 and the pinch roller 4 from the magnetic tape 7 of the cassette. spring (return spring 6) and magnetic head 3
, it is necessary to separately provide a spring (following spring 9) for causing the pinch roller 4 to follow the operation lever 8, so the number of parts is large and the configuration is complicated.Moreover, the elastic force of the following spring 9 is equal to that of the return spring. 6 and the expansion spring 5, the operating lever 8 is rotated clockwise in FIG. It requires a considerable amount of force to move, and has the drawback of poor operability.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an operating device for a tape recorder that has a small number of parts, is simple in structure, and has good operability.

An embodiment in which the present invention is applied to an operating device for a dictation recorder, which is a type of tape recorder, will be described below with reference to FIGS. 2 to 1.
This will be explained with reference to FIG.

Figures 2 to 4 show a dictation machine 1 to which this invention is applied.
Fig. 2 is a side view, Fig. 3 is a plan view, and Fig. 4 is a front view.

This dictation recorder 11 has a lid 12 hingedly connected to the front half of its upper surface, and the lid 12 is opened to load or remove a tape cassette from a cassette loading section.

Further, the lid 12 is provided with a transparent window 12a, through which the cassette loading section can be observed from the outside.

On the front of the dictation recorder 11, a volume control knob 13, a built-in microphone net 14, an earphone connection jack 15, an external microphone connection jack 16, and the like are arranged.

In addition, a large number of small holes 17 are provided in the rear half of the upper surface of the dictation recorder 11.
is open, and the audio output reproduced by the reproduction magnetic head is emitted from a speaker housed in the rear half thereof.

Next, the operating device 18 provided inside the dictation recorder 11
will be explained based on FIGS. 5 and 6.

In the figure, 19 and 20 are a head support lever and a pinch roller support lever, respectively.

These support levers 19 and 20 are stacked with the shorter pinch roller support lever 20 on top, and one end of each is rotatably supported on a common shaft 21.

A magnetic head 22 is fixedly attached to the upper surface of the head support lever 19 on the rotation end side, and a pinch roller 23 is rotatably attached on the upper surface of the pinch roller support lever 20 on the rotation end side. .

In the figure, reference numeral 24 denotes an operating lever whose intermediate portion is rotatably supported on a shaft 25, with a locking pin 26 protruding from one rotating end, and a spring catch 27 protruding from the tip of the rotating end. I'm letting you do it.

The locking pin 26 has an abutting piece 19a that protrudes forward from the rotating end of the head support lever 19, and an abutting piece 2 that protrudes forward from the rotating end of the pinch roller support lever 20.
0a are in contact with each other.

In addition, reference numerals 28 and 29 in the figure are first and second tension springs, respectively. The locking pin 26 and the head support lever 19 which are also the contact parts with the lever 24
The second tension spring 29 is passed between the spring hook 30 provided at the pivot end of the operating lever 24, and the second tension spring 29 is connected to the spring hook 27, which is further away from the center of rotation of the operating lever 24 than the locking pin 26, and the pinch pin. The distance between the rotation end of the roller support lever 20 and the distance from the locking pin 26 to the rotation center of the pinch roller support lever 20 is
The hook is passed between the spring hook 31 and a spring hook 31 provided at a position close to the center of rotation.

Note that there is a rising piece 19 at the rotating end of the head support lever 19.
b is formed, and a cut and raised piece 19c cut and raised downward is formed on the lower surface side of the lever 19.

In the figure, reference numeral 32 denotes an intermediate lever, which has an abbreviated shape, and its bent portion is rotatably supported by one of the fixing pins 33, which will be described later.

One end of this intermediate lever 32 is connected to an operating lever 24.
It comes into contact with the locking pin 26 of.

In the figure, reference numeral 34 denotes an operation plate, and a sliding operation button 35 is fixed on the minus side, and the sliding operation button 35 is exposed on the outer surface of the dictation recorder 11.

The operation plate 34 has elongated holes 36 extending in the vertical direction in the figure at three locations, and a fixing pin 33 is inserted into each of the elongated holes 36, and the sliding operation button 35 can be manually operated along the outer surface. It is possible to reciprocate in one direction, which is the vertical direction in the figure, and in the other direction.

A stopper pin 37 that abuts the other end of the operating lever 24 and a suppressor pin 38 that abuts one end of the intermediate lever 32 protrude from the intermediate portion and the lower end of the operating plate 34, respectively.

Further, a step portion 39 is provided on the middle side of the left edge of the operation plate 34, a pressing protrusion 40 is provided on the upper end of the operation plate 34 in the figure, and an engaging tongue piece 41 is provided on the side of the pressing protrusion 40. , are formed respectively.

Four click holes 42, 4 are provided in the middle part of the operation plate 34.
3, 44, and 45 are arranged in a straight line from the top to the bottom in the figure.

The click hole 42 at the end is smaller than the other three click holes 43, 44, and 45.

On the other hand, a hole 47 is provided in one side of the fixed substrate 46 of the dictation recorder 11, as shown in FIG.
A ball 48 is inserted into the hole.

The ball 48 is partially attached to the click hole 49 by a leaf spring 49 whose one end is fixed to the fixed base plate 46.
43, 44 and 45 selectively.

Further, in FIG. 5, reference numeral 50 denotes an interlocking lever whose one end is rotatably supported on a shaft 51, and has a pair of abutting pieces 52 and 53 at the upper end in the figure, which serves as a pivot point. However, another contact piece 54 is also provided at the lower end in the figure.

The contact piece 52 is located in front of the pressing protrusion 40 of the operation plate 34.

In the figure, 55 is an accidental erasure prevention lever.
is rotatably supported at its middle part around a shaft 56, and has a lug detection water 57 at the upper end in the figure that faces the lug of the tape cassette loaded in the cassette loading section of the dictation recorder 11, and Stopper portions 5 are provided at the lower end and middle side, respectively.
8.59 is formed.

A deployment spring 60 is wound around the shaft 56, and both ends of the deployment spring 60 are hooked between the rotating end of the interlocking lever 50 and the lower end of the accidental erasing prevention lever 55 in the figure, so that the interlocking The lever 50 and the erroneous erasure prevention lever 55 are elastically integrated.

Further, a tension spring 61 is provided between the shaft 56 and the other end of the operating lever 24 .

In the figure, reference numeral 62 denotes a cue lever, and the cue lever 62 has an intermediate portion rotatably supported by one of the fixing pins 33.

A bifurcated pressing piece 63a>63b is formed at the upper end of the cue lever 62 in the drawing, and a pressing piece 64 is formed at the lower end in the drawing, and the pressing piece 63a faces the contact piece 53 of the interlocking lever 50. However, the pressing piece 64 is positioned so as to face the other end of the intermediate lever 32.

In addition, a pair of pressing pieces 63 a and 6 of the cue lever 62
A locking piece 65 is provided on one side between the fixing pin 33 and the fixing pin 33.

The cue lever 62 is rotated clockwise by a tension spring 66, and can be rotated by manually pressing the cue button 61 attached to the upper side of the figure from outside the dictation recorder 11. It has become.

In the figure, reference numeral 68 denotes an FF lever, which is rotatably supported and biased clockwise by a tension spring 69, so that its upper surface in the figure is held in contact with the shaft 70.

Further, an FF button 71 is attached to one end of the FF lever 68, and when the FF button 71 is pressed from outside the dictation recorder 11, the FF lever 68 rotates counterclockwise.

A switch operating piece 72 is provided at one end of the FF lever 68, and locking pieces 73 and 74 bent downward are provided at the other end of the FF lever 68.

Note that 75 indicated by an imaginary line in FIG.
This is the capstan shaft disposed at the upper position in Figure 3.

Next, the drive mechanism 76 of this dictation recorder 11 will be explained based on FIG. 7.

77 and 78 in FIG. 7 are a pair of reel shafts disposed at symmetrical positions above the capstan shaft 75 in the figure;
The lower end has reel stands 77a and 78a.

The reel shaft 77 on the left in the figure is rotatably supported by the fixed base plate 46 on the tape winding side, and the reel shaft 78 on the right
is the tape supply side, and this is the tape end detection lever 79.
It is rotatably supported at one end.

The tape end detection lever 79 has a portion near the reel shaft 78 rotatably supported on a shaft 80 fixed to the fixed substrate 46, and a swing lever 81 is rotatably supported at the other end of the tape end detection lever 79. It is supported for free movement.

The swinging lever 81 is L-shaped, and its bent portion is pivotally supported by the tape end detection lever 79, and is rotated counterclockwise by a deployment spring 82 hooked between the tape end detection lever γ9 and the tape end detection lever γ9. It is biased.

The swing lever 81 has one end facing the inner peripheral surface of a flywheel 83 attached to the capstan shaft 75, and the other end facing the alarm microswitch SW1.

When the alarm microswitch SW1 is turned on, an alarm sound generating device (not shown) emits an alarm sound indicating the end of the tape.

In the drawing, reference numeral 84 indicates a tension spring that rotates and biases the tape end detection lever 79 counterclockwise, and reference numeral 85 indicates a deployment spring wound around the shaft 80.

One end of the deployment spring 85 extends to a position above the locking pin 26 of the operating lever 24 in the drawing.

Further, a semicircular notch 86 is formed in a part of the inner circumferential surface of the flywheel 83.

Reference numeral 87 in the figure is a switching lever, and the switching lever 87 has its upper end rotatably supported on a shaft 70, and has a relatively small-diameter positive rotation idler pulley 88 and a relatively large-diameter idler pulley 88 at its lower end and in the middle. A reverse rotation idler pulley 89 is rotatably supported.

Additionally, a deployment spring 9 is provided at the lower end of the switching lever 87 in the figure.
0 is attached.

One end of the deployment spring 90 extends to a position above the locking pin 26 of the operating lever 24 in the drawing.

Furthermore, a switch operation piece 91 is provided on the side of the switching lever 87 near the shaft 70.

The switch operation piece 91 almost overlaps with the switch operation piece 72 of the FF lever 68.

A sub-switch SW2 is disposed below both switch operation pieces 91 and 72 in the figure.

Further, SW3 in the figure is a main switch, and the main switch SW3 is disposed above the rising piece 19b of the head support lever 19 in the figure.

The main switch SW3 and the sub-switch SW2 are connected in parallel to each other in a motor drive circuit (not shown), and when either one is turned on, the motor 92 is rotated.

A pulley 93 is attached to the rotating shaft of the motor 92, and a pulley 94 is attached to the capstan shaft γ5.

An endless belt 95 is provided between the pulley 93 and the flywheel 83, and an endless belt 96 is provided between the pulley 94 and the idler pulley 89 for reverse rotation.

The small diameter idler pulley 88 for forward rotation is in elastic contact with the endless belt 96 from the outside, and is pressed against the reel stand 77a of the reel shaft 77 on the winding side by the tension of the endless belt 96.

Next, the operation of this dictation recorder 11 will be explained.

First, the dictation recorder 11 can be operated as desired by manually moving the sliding operation button 35 in one direction and the other direction, which is the vertical direction in the figure.

That is, in the state shown in FIG. 6 in which the click hole 44 of the operation plate 34 is engaged with the ball 48, the recorder 11 is in a stopped state, and the magnetic head 22 and pinch roller 23 are loaded as shown in FIG. It is located away from the magnetic tape 97 in a tape cassette (not shown) as shown in FIG.

The positions of the head support lever 19 and the pinch roller support lever 20 at this time are defined as the first positions of the head support lever 19 and the pinch roller support lever 20.

In this state, the operating lever 24 is urged counterclockwise by the respective urging forces of the tension spring 61 and the second tension spring 29, and the stopper pin 3γ of the operating plate 34
Since the rotation thereof is restricted, the head support lever 19 and the pinch roller support lever 20 are biased to the first position.

Therefore, when the sliding operation button 35 is moved forward and forwardly operated, the pressing protrusion 40 of the operation plate 34 is pressed against the interlocking lever 50.
Push the abutting piece 52 and rotate the interlocking lever 50 counterclockwise.

At this time, if the tape cassette is not loaded into the cassette loading section of the dictation recorder 11 or if the loaded tape cassette does not have a lug, the accidental erasure prevention lever 55 rotates following the interlocking lever 50. Then, the stopper portion 58 of the erroneous erasure prevention lever 55 moves to the upper position in the figure of the stepped portion 39 of the operation plate 34, and prevents the operation plate 34 from moving upward in subsequent figures, thereby prohibiting the recording operation due to an erroneous operation. (Figure 8).

However, if the loaded tape cassette has a lug, the erroneous erasure prevention lever 55 brings the lag detection water 57 into contact with the lug and does not follow the rotation of the interlocking lever 50.

Therefore, upward movement of the operation plate 34 in the figure is allowed.

Therefore, when the operation plate 34 is moved to a position where the click hole 45 engages with the ball 48, the suppression pin 38 is moved to the intermediate lever 32.
Push the operating lever 24 clockwise via the button.

As a result, the head support lever 19 and the pinch roller support lever 20 follow the operation lever 24 with their contact pieces 19a and 20a in contact with the locking pin 26 of the operation lever 24, and the magnetic head 22 and the pinch roller roller 23
is brought into contact with the magnetic tape 97 (FIG. 9).

The positions of the head support lever 19 and the pinch roller support lever 20 at this time are defined as the second positions of the head support lever 19 and the pinch roller support lever 20.

Further, the main switch SW3 is turned on when its movable contact piece is pushed by the rising piece 19b of the head support lever 19, and the motor 92 is rotated.

As a result, the capstan shaft 75 rotates, and the rotational force of the capstan shaft 75 is transmitted to the reel shaft 77 on the winding side via the pulley 94 and the idler pulley 88 for forward rotation. It rotates and enters recording operation state 4.

Note that when the sliding operation button 35 is moved from the stop operation state setting position to the recording operation state setting position shown in FIG. Since it rotates counterclockwise about the locking pin 26 as a fulcrum, the first tension spring 28, which is hooked between the locking pin 26 and the spring hook 30 of the head support lever 19, has a constant length. However, the second tension spring 29, which is hooked between the spring hook 27 of the operating lever 24 and the spring hook 31 of the pinch roller support lever 20, is gradually stretched and stored.

Therefore, members such as the head support lever 19, the pinch roller support lever 20, the operation lever 24, and the operation plate 34 are
is biased in the return direction, that is, toward the first position, by the tension spring 29 and the tension spring 66, and is operated by the click hole 45 engaging the ball 48 and generating a relatively large frictional force. The plate 34 is locked at the recording operation state setting position, and even if the slide operation button 35 is released, the above-mentioned members do not return to the stop position.
Recording operation status is held in the setting position.

Next, the slide type operation button 35 is moved forward by returning it to the stop operation state setting position (the position where the click hole 44 engages with the ball 48), and then the slide type operation button 35 is moved downward in the figure. Then move the operation panel 3 forward.
4 to a position where the click hole 43 engages with the ball 48, the stopper pin 37 pushes the operating lever 24 clockwise.

As a result, the head support lever 19 and the pinch roller support lever 20 follow the operation lever 24 with their contact pieces 19a and 20a in contact with the locking pin 26 of the operation lever 24, and the magnetic head 22 and the pinch roller Roller 23 contacts magnetic tape 97 (FIG. 10).

The positions of the head support lever 19 and the pinch roller support lever 20 at this time are also the second positions of the head support lever 19 and the pinch roller support lever 20.

Further, the main switch SW3 is turned on when its movable contact piece is pushed by the rising piece 19b of the head support lever 19, and the motor 92 rotates, causing the capstan shaft 75 and the reel shaft 17 on the winding side to rotate. It enters the playback operation state.

In this case as well, the second tension spring 29, which is hooked between the tension spring 61 and the operating lever 24 and the pinch roller support lever 19, is gradually stretched as the operating lever 24 rotates. However, when the click hole 43 engages with the ball 48 and generates a relatively large frictional force, the operation plate 34 is locked in the regeneration operation state setting position, and the user can release the slide operation button 35 and release the operation plate 34. The head support lever 19, the pinch roller support lever 20,
The members such as the operation lever 24 and the operation plate 34 do not move back toward the stop operation state setting position, but are held at the regeneration operation state setting position.

Next, when the sliding operation button 35 is further moved downward in the figure to the position where the click hole 42 of the operation plate 34 engages with the ball 48, the stopper pin 37 moves the operation lever 24 further clockwise. Push it around.

At this time, the locking pin 26 of the operating lever 24 moves away from the contact pieces 19a, 20a of the head support lever 19 and the pinch roller support lever 20 and further moves upward in the figure, so that the deployment spring 90 provided on the switching lever 87 After pressing and rotating the switching lever 81 counterclockwise,
Deployment spring 85 provided on tape end detection lever 79
comes into ballistic contact with.

On the other hand, the pressing pin 38 provided on the operation plate 34 moves downward in the figure and comes into contact with the cut-and-raised piece 19c provided on the head support lever 19 from above in the figure, causing the head support lever 19 to move downward in the figure. move it.

In addition, the pinch roller support lever 20 has its spring hook 31 bent along the rear edge of the head support lever 19 in a direction substantially perpendicular to the page, so that the head support lever 19 is When the pinch roller support lever 20 moves in this direction, the pinch roller support lever 20 also moves downward in the figure.

Thus, the magnetic head 22 and the pinch roller 23 are separated from the magnetic tape 97, and the rising piece 19b of the head support lever 19 releases its bias against the main switch SW3.

The positions of the head support lever 19 and the pinch roller support lever 20 at this time are also the first positions of the head support lever 19 and the pinch roller support lever 20.

Further, the switching lever 87 is rotated counterclockwise, and the switch operation piece 91 is used to turn on the sub switch SW2.
The motor 92 continues to rotate.

Further, as the switching lever 87 rotates, the small diameter idler pulley 88 for forward rotation is moved to the reel stand of the reel shaft 77 on the winding side. ? a, the large diameter idler pulley 89 for reverse rotation comes into pressure contact with the reel stand 78a of the reel shaft 78 on the supply side via the endless belt 96, and the rotational force of the capstan shaft 75 is applied to the reel shaft 18 on the supply side. The reel shaft 18 on the supply side rotates as a result of the transmission, and a tape rewinding operation is performed (FIG. 11).

In this case, since the tension spring 61 and the second tension spring 29 are stored as the operation lever 24 rotates, the head support lever 19, the pinch roller support lever 20, the operation lever 24, and the operation plate 34 and the like are urged in the return direction by the tension spring 61 and the second tension spring 29, but the click hole 42 provided in the operation plate 34 engages with the ball 48 with a relatively small frictional force. Therefore, the person operating the dictation recorder 11 can hold the sliding operation button 35 in the tape rewinding operation position with a small amount of force.

However, since the click hole 42 is small, the ball 4
8 cannot fully enter into the click hole 42, and the above-mentioned members cannot be held in the tape rewind operation state setting position with the relatively small frictional force generated by the engagement between the click hole 42 and the ball 48. , sliding operation button 35
When the hand is released, each member moves in the return direction and is held at the position where the click hole 43 engages with the ball 48, that is, the regeneration operation state setting position.

As mentioned above, each operation of recording, playback, and tape rewinding is
This can be done simply by reciprocating one sliding operation button 35 in one direction and the other direction, which is the up and down direction in the figure, but the tape fast forward operation and the discrimination signal recording operation are performed using the FF button 11 and the cue button 67, respectively. This can be done by suppressing the

That is, when the FF button 71 is pressed, the FF lever 68 rotates counterclockwise against the tension spring 69, and the FF lever 68 rotates counterclockwise against the tension spring 69.
The sub switch SW2 is operated by the switch operation piece 12 of the lever 68.
Press the movable contact piece.

Then, when the sub switch SW is turned on, the motor 9
2 rotates, and the reel shaft 17 on the winding side is
is rotated (Fig. 12).

At this time, since the pinch roller 23 is located away from the capstan shaft 75, the capstan shaft 75 does not perform tape feeding operation, and the magnetic tape 97 is moved into the tape cassette solely at the rotational speed of the reel shaft 77 on the take-up side. When the FF lever 68 is returned to its original position by the tension spring 69, the sub-switch SW2 is opened, and the motor 92 is stopped.

Note that during the recording operation, the engaging tongue piece 41 of the operation plate 34 is set to FF.
Located on the orbit of the locking piece γ4 of the lever 68, the FF button γ1
Pressing operations are prohibited.

Also, during tape fast forwarding operation, the locking piece 74 is attached to the engaging tongue piece 4.
1, and recording operations are prohibited.

Further, when the cue button 67 is pressed and the cue lever 62 is rotated counterclockwise against the tension spring 66, the pressing piece 63a of the cue lever 62 pushes the contact piece 53 of the interlocking lever 50, Rotate the interlocking lever 50 counterclockwise.

At this time, if no tape cassette is loaded or if the loaded tape cassette does not have lugs, the accidental erasure prevention lever 55 rotates following the interlocking lever 50, and the stop of the accidental erasure prevention lever 55 The portion 59 comes to be located on the trajectory of the locking piece 65 of the cue lever 62, preventing the cue lever 62 from rotating thereafter, and prohibiting the discrimination signal recording operation by this operation (FIG. 13).

However, if the loaded tape cassette has a lug, the erroneous erasure prevention lever 55 brings the lag detection water 51 into contact with the lug and does not follow the rotation of the interlocking lever 50.

Therefore, the rotational movement of the cue lever 62 is allowed.

Therefore, when the cue lever 62 is sufficiently rotated counterclockwise, the suppressing piece 64 of the cue lever 62 pushes the intermediate lever 32 clockwise, and one end of the intermediate lever 32 engages the locking pin of the operating lever 24. 26 to rotate the operating lever 24 clockwise against the tension spring 61.

Then, the head support lever 19 and the pinch roller support lever 20 follow the rotational movement of the operating lever 24 and rotate counterclockwise, and the magnetic head 22 and the pinch roller 23 contact the magnetic tape 97 (fourteenth figure).

The positions of the head support lever 19 and the pinch roller support lever 20 at this time are also the second positions of the head support lever 19 and the pinch roller support lever 20.

Further, the main switch SW3 is turned on when its movable contact piece is pushed by the rising piece 19b of the head support lever 19.
The motor 92 rotates, the capstan shaft 75 and the reel shaft 77 on the winding side rotate, and a discrimination signal recording operation state is entered.

In addition, this discrimination signal is used to distinguish between records that should actually be written and records that do not need to be written (for example, when the recorded content recorded on the magnetic tape 97 is reproduced and typed or written). This is a signal for determining whether the

By the way, in this dictation recorder 11, for example, when the magnetic tape 97 runs out on the supply side reel of the tape cassette during a recording operation, an alarm sound generating device is activated to emit an alarm sound to notify the end of the tape. ing.

The operation in this case will be explained with reference to FIGS. 15 and 16.

When the tape cassette is loaded into the cassette loading section and the sliding operation button 35 is moved forward, as described above, if the tape cassette has a lug, the click hole 45
A recording operation can be performed while the ball 48 is engaged with the ball 48.

At this time, the tension of the magnetic tape 97 acts as a clockwise rotational force on the tape end detection lever 79 supporting the reel shaft 78 on the supply side. Rotation of the lever 79 is prohibited.

In this state, one end of the swing lever 81 is away from the inner peripheral surface of the flywheel 83, and the other end of the swing lever 81 is away from the alarm microswitch SW1 (see FIG. 7). .

Therefore, the magnetic tape 9 is placed on the supply reel of the tape cassette.
7 runs out, the end of the magnetic tape 97 is fixed to the reel, so the tension of the magnetic tape 97 increases rapidly, and the tape end detection lever 79 rotates clockwise against the tension spring 84. However, the swing lever 81 is shifted to a large extent, and one end of the swing lever 81 is recessed into the notch 86 of the flywheel 83 (FIG. 15).

However, since the flywheel 83 is rotating clockwise, the inner edge of the notch 86 pushes one end of the swing lever 81 against the deployment spring 82 .

As a result, one end of the swing lever 81 is connected to the flywheel 8.
It comes into sliding contact with the inner circumferential surface of 3, and the swing lever 8
The other end of 1 pushes the movable contact piece of the alarm microswitch SW1.

When the alarm microswitch SW1 is turned on, the alarm sound generating device is activated and an alarm sound indicating the end of the tape is emitted (FIG. 16).

Note that the swing lever 81 has one end connected to the flywheel 8.
3 is inserted into the notch 86 each time it rotates, and each time it is rotated counterclockwise by the deployment spring 82,
The other end is separated from the movable contact piece of the alarm microswitch sW, resulting in the state shown in FIG. 15.

Therefore, the alarm micro switch S'w! Ha 1st
As shown in FIG. 7, each time the flywheel 83 rotates once, it is instantaneously turned off.

However, since the time that the alarm microswitch SW1 is in the OFF state is extremely short, the alarm sound is emitted almost continuously.

With the above configuration, the dictation recorder 11 shown in this embodiment has the following advantages.

First, each operation of recording, playback, and tape rewinding can be performed by reciprocating one sliding operation button 35 in one direction and the other direction, which is the vertical direction in the figure. The structure is simpler and the operability is better than that provided with operation buttons.

The operation plate 34 is provided with a relatively small diameter click hole 42 and a relatively large diameter click hole 43°44.45, and the fixed board 46 is provided with a hole 47, and a ball 48 inserted into this hole 47 is inserted. The click holes 42, 43,
44 and 45, the magnetic head 22 and the pinch roller 23 can be stably held at the stop operation state setting position by engaging the click hole 44 with the ball 48. Furthermore, by engaging the click hole 45 or 43 with the ball 48, the magnetic head 22 and the pinch roller 23 can be locked in the recording or playback operating state setting position.

In addition, when rewinding the tape, the sliding operation button 35
can be held at a predetermined rewind operation state setting position accurately and with a small force, and moreover, while the operator manually holds the sliding operation button 35 at the predetermined rewind operation state setting position. However, this embodiment satisfies this need by providing a small diameter click hole 42 that engages the ball 48.

That is, when the sliding operation button 35 is moved to a position where the click hole 42 engages with the ball 48, the tape rewind operation is performed.
8, the sliding operation button 35 can be held at a predetermined rewind operation state setting position accurately and with a small force.Moreover, since the click hole 42 has a small diameter, the click hole 42 The engagement with the ball 48 alone cannot resist the return force of the operating plate 34, and when the operator releases the sliding operating button 35, the tape rewinding operation state is released.

-Lf,=, The head support lever 19 to which the magnetic head 22 is attached and the pinch roller support lever 20 to which the pinch roller 23 is attached are rotatably supported on a common shaft 21, and the operating lever 24 and the head support lever 19 and between the operating lever 24 and the pinch roller support lever 20, the first and second tension springs 28 and 29 are respectively passed between the head support lever 19 and the pinch roller support lever 2.
0 rotates following the operating lever 24,
Since the second tension spring 29 is configured to store energy as the magnetic head 22 and pinch roller 23 move toward the magnetic tape 97, a deployment spring is attached to the head support lever and the pinch roller support lever. There is no need to strengthen the spring to make the head support lever and pinch roller support lever follow the operation lever, unlike in the conventional system in which both support levers are elastically integrated by passing the hook. 35 can be moved easily, improving operability.

In addition, since the second tension spring 29 also functions as a return spring for returning the head support lever 19 and the pinch roller support lever 20 to the first position and biasing the head support lever 19 and the pinch roller support lever 20 to the first position, a separate return spring is required. There is no need to provide a , the number of parts can be reduced, and the configuration can be simplified.

In this case, if one end of the first tension spring 28 is hung on the spring hook 27, it can function as a return spring.

In addition, a common erroneous erasure prevention lever 55 handles recording operations caused by erroneous operation of the slide type operation button 35 and recording operations caused by erroneous operation of a cue button 67 provided separately from the slide type operation button 35.
Since this is prevented, the number of parts is small and the configuration is simple.

In addition, the reel shaft 78 on the supply side is attached to one end of a rotatably provided tape end detection lever 79, and the tape end detection lever 79 is rotated by the tension at the end of the magnetic tape 9γ. The swing lever 81 provided at the other end of the flywheel 83 is moved to the switch operation position, and at that position, one end of the swing lever 81 is pushed and rotated by a notch 86 formed on the inner circumferential surface of the flywheel 83 to close the swing lever. One end of the swing lever 81 is brought into sliding contact with the inner circumferential surface of the flywheel 83, and the other end of the swing lever 81 closes the alarm microswitch SW to operate the alarm sound generator. The magnetic tape 97 on the supply reel side can be activated by listening to the alarm sound emitted from the alarm sound generating device without looking at the running state of the tape.
You can immediately know that the process has ended.

Moreover, since the tape end detection lever γ9 is pivoted at a position close to the reel shaft 78 on the supply side, the magnetic tape 97
The amount of movement of the reel shaft 78 due to the tension is magnified and transmitted to the swinging lever 81, and the swinging lever 81 can be shifted by a large amount.

Since one end of the swing lever 81 is inserted into the notch 86 provided in the flywheel 83 and the swing lever 81 is rotated by the rotational force of the flywheel 83, the swing lever 81 is reliably operated. do.

Furthermore, since an alarm sound is emitted when one end of the swing lever 81 is in sliding contact with the inner circumferential surface of the flywheel 83, the alarm sound is emitted almost continuously and the notification function is fully demonstrated. Can be done.

Also, even though the tension of the magnetic tape 97 strongly acts on the reel shaft 78 on the supply side during tape rewinding,
During the tape rewinding operation, the locking pin 26 of the operation lever 24 engages the deployment spring 85 provided on the tape end detection lever 79.
Since the clockwise rotation of the tape end detection lever 79 is prevented by pressing the tape end detecting lever 79, the alarm sound generating device will not malfunction during tape rewinding operation.

Furthermore, in the state of tape rewinding operation, the operating lever 24
The switching lever 87 is pushed and rotated by the locking pin 26 provided on the switching lever 87, and the reverse rotation idler pulley 89 attached to the switching lever 87 is pressed against the reel stand 78H of the reel shaft 78 on the supply side via the endless belt 96. However, locking pin 2
6, the switching lever 87 is pushed around via a deployment spring 90 provided on the switching lever 87, so that the pressing force of the reverse rotation idler pulley 89 against the reel stand 78a is adjusted appropriately by the elastic force of the spring 90. If the pressing force is too strong, it may damage the endless belt 96, or if the pressing force is too weak, the endless belt 96 and the reel stand 78 may be damaged.
There will be no inconvenience such as slippage between the

As described in detail above, the operating device for a tape recorder of the present invention includes an operating lever that is rotatably provided; A sliding operation button that rotates; one end touches a part of the operation lever that is spaced from the center of rotation; one end supports the magnetic head; the other end is the center of rotation, and the magnetic head is separated from the magnetic tape. the first position where the magnetic head is in contact with the magnetic tape, and the second position where the magnetic head is in contact with the magnetic tape.
a head support lever that is rotatable between positions; one end is in contact with a part of the operating lever that is spaced from the center of rotation; one end supports a pinch roller; the other end is the center of rotation for the head; a pinch roller support lever that is rotatable coaxially with the support lever between a first position in which the pinch roller is spaced apart from the magnetic tape and a second position in which the pinch roller is in contact with the magnetic tape; an operating lever and a head; A hook is passed between the support lever and the head support lever to the first position while maintaining contact between one end of the head support lever and the operation lever.
A first tension spring rotates between the operating lever and the pinch roller support lever between the operating lever and the pinch roller supporting lever. Rotating the operating lever in one direction and the other direction between the first position and the second position while maintaining contact between one end of the pinch roller supporting lever and the operating lever. a second tension spring that rotates in accordance with It is attached to the control lever at a position farther from the center of rotation of the control lever than the center of rotation of the control lever, and closer to the center of rotation of the head support lever than the distance from the contact area of the head support lever with the control lever to the center of rotation of the head support lever. force to be attached to the head support lever at a position that The pinch roller support lever is attached to the pinch roller support lever at a position closer to the rotation center of the pinch roller support lever than the distance from the contact area of the pinch roller support lever to the operation lever to the rotation center of the pinch roller support lever, and the pinch roller support lever and storing an elastic force that causes the head support lever to move to the first position and returns the head support lever and the pinch roller support lever to the first position by being pulled by the rotation of the operating lever in the one direction; It is characterized by

Therefore, according to the present invention, there is provided a spring for integrating the head support lever and the pinch roller support lever, a return spring for separating the magnetic head and the pinch roller attached to each support lever from the tape cassette, and a spring for integrating the head support lever and the pinch roller support lever. There is no need to separately provide springs for making both support levers follow the operation lever, and it is only necessary to hang the first and second tension springs for follow-up between each support lever and the operation lever. Fewer parts,
It is possible to provide an operating device for a tape recorder that has a simple configuration and can be easily operated since the operating lever can be rotated easily by not using a return spring.

Note that the present invention is not limited to the operating device for a dictation recorder shown in the embodiment, but can be widely applied to an operating device for a cassette tape recorder.

[Brief explanation of the drawing]

1a and 1b are operation explanatory diagrams showing a conventional example; FIGS. 2 to 17 show an embodiment of the present invention; FIG. 2 is an external side view; FIG. 3 is an external plan view; Fig. 4 is a front view of the external appearance, Fig. 5 is a plan view of the operating device, Fig. 6 is a partial side sectional view of Fig. 5, Fig. 7 is a plan view of the drive mechanism, and Figs.
FIG. 7 is a plan view showing the operating state of each part. 11...dictation recorder, 18...operating device, 19...head support lever, 20...
... Pinch roller support lever, 22 ... Magnetic head, 23 ... Pinch roller, 24 ...
・Operation lever 26...Latching lever, 27...
...Spring hook, 28...First tension spring, 29...Second tension spring, 3
0.31...Spring hook, 35...
-Sliding operation button.

Claims (1)

[Scope of Claims] 1. A rotatably provided operating lever; a sliding operating button connected to the operating lever and reciprocating linearly to rotate the operating lever in one direction and the other; one end; The magnetic head is placed in a first position in which the magnetic head is placed in contact with a portion of the operating lever that is spaced apart from the center of rotation, the magnetic head is supported at one end, and the magnetic head is spaced apart from the magnetic tape with the other end being the center of rotation. a head support lever that is rotatable between a second position in contact with the magnetic tape; one end of which is in contact with a portion of the operating lever that is spaced apart from the center of rotation; one end supports a pinch roller; a pinch roller that is rotatable coaxially with the head support lever between a first position in which the pinch roller is spaced from the magnetic tape and a second position in which the pinch roller is in contact with the magnetic tape; A support lever; A hook is passed between the operation lever and the head support lever, and the head support lever is moved between the first position and the second position while maintaining contact between one end of the head support lever and the operation lever. a first tension spring that rotates following the rotation of the operating lever in one direction and the other direction; a hook is passed between the operating lever and the pinch roller support lever, and one end of the pinch roller support lever; A second method for rotating the pinch roller support lever between the first position and the second position while maintaining contact with the operating lever and following the rotation of the operating lever in one direction and the other direction. a tension spring; and at least one of the first and second tension springs is located at one end of the operating lever and is further away from the center of rotation of the operating lever than the contact area between the head support lever and the operating lever. It is attached to the operating lever at a distance, and is attached to the head supporting lever at a position closer to the center of rotation of the head supporting lever than the distance from the contact area of the head supporting lever to the operating lever to the center of rotation of the head supporting lever. Or, the pinch roller support lever is attached to the operating lever at one end of the operating lever and is further away from the center of rotation of the operating lever than the contact area between the pinch roller support lever and the operating lever, and the pinch roller support lever makes contact with the operating lever. It is attached to the pinch roller support lever at a position closer to the rotation center of the pinch roller support lever than the distance from the part to the rotation center of the pinch roller support lever, and the pinch roller support lever and the head support lever are moved to the fourth position. An operating device for a tape recorder, characterized in that an elastic force is stored that biases the operating lever and returns the head support lever and the pinch roller support lever to the first position by being pulled by the rotation of the operating lever in the one direction.