JPH034986Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention includes, for example, a cassette in which a pair of spools is wound with an end-ended magnetic tape, and the spool in the cassette is rotated via a drive reel to run the tape, thereby recording and recording. This relates to a tape recorder that plays back, and generally the brake mechanism that fixes the drive reel in a stopped position must be released during recording, playback, fast forwarding, and rewinding, so a brake piece that prevents the drive reel from rotating freely is required. is operated in the brake release direction in conjunction with the ON operation of the playback, fast forward, and rewind levers, but this interlocking structure has conventionally been composed of many links, etc., and is complex and requires many parts. There are many problems, such as a large number of points, which increases the number of failure factors, requires a large amount of installation space, and lacks productivity.

However, the present invention has a brake piece that prevents the drive reel from rotating freely, a performance plate that slides on the base chassis to bring the magnetic head into contact with the tape in a playing state by operating the recording lever and playback lever, and a fast forward mechanism. It is equipped with a sliding plate that slides when the lever and the rewind lever are operated, and the opening part of the performance plate is connected to the pin fixed to the brake piece during recording and playback, and the shoulder of the sliding plate is connected during fast forwarding and rewinding. By bringing the parts into contact with each other and releasing the brake with the brake piece, by interposing the sliding plate and the brake piece between the performance plate and the chassis, the brake piece can be applied to the performance plate and the sliding plate. The interlocking structure between the playback lever, fast forward lever, rewind lever, and brake piece can be simply configured with a playing plate and a sliding plate by properly interlocking without using special parts, and this interlocking structure can be It is designed to be compactly installed within the installation space of the performance plate.

An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a front view showing the cassette device side of the tape recorder, and FIG. 2 is a back view showing the drive side, where 1 is a supply reel, 2 is a take-up reel, and 3
6 is a recording plate comprising a recording/playback head 4 and an erasing head 5; 6 is a recording button REC, a playback button PLAY, a rewind button REW, a fast forward button FF,
Pause button PAUSE and stop button STOP
EJECT is the operating mechanism for each lever that is attached (the numbers are the same as the numbers for each button), and EJECT is the ejection lever that takes out the installed cassette.

FIG. 3 is a view taken along the line A-A in FIG.
REC, PLAY, REW, FF, PAUSE, STOP are at each bending part 8, 9, 10, 11, 1 approximately in the middle of this
2, 13 and each bent portion 14, 15, 1 of the chassis 7
6, 17, 18, 19, respectively, through springs 20, 21, 22, 23, 24, 25, which are stretched between them, so that they can be slid back in the directions of the arrows. In addition, each of the operation levers REC, PLAY, REW,
Between FF, PAUSE, STOP and the chassis 7, a lever lock sliding plate 26 and a lever malfunction prevention plate 27, as shown in FIG. 4, are provided in a superposed manner. The sliding plate 26 has a spring 28 stretched on the chassis 7.
The sliding plate 26 is biased to the left through the movement of the operating portions 29, 30, 31, 32, and 33 formed on each of the operating levers REC, PLAY, REW, FF, and STOP. Tapered surfaces 34, 35, 36, 37, 38 that should slide against the spring 28
At this moving position of the acting parts 29 to 33, the acting parts 2
Lever REC that locks and presses 9 to 33,
Locking portions 39, 40, 41, and 42 are formed to lock PLAY, REW, and FF in the operating state. The malfunction prevention plate 27 locks the play lever PLAY, the rewind lever REW, and the fast forward lever FF so that they cannot be operated during the recording state. By moving 29, the plate 27
The tapered groove 43 moves the lever to the right, and this movement causes the operating portions 3 of the levers PLAY, REW, and FF to move to the right.
Lock portions 44, 45, and 46 are provided to lock the parts 0, 31, and 32 so that they do not move. Fifth
The figure shows a state in which the playback lever PLAY, rewind lever REW, and fast-forward lever FF cannot be operated during the recording state.As the action part 29 of the recording lever REC moves, the action part 29 is moved by the sliding plate. 36, the sliding plate 26 is moved one step to the right against the spring 28, and then locked by the locking portion 39. At the same time, the operating portion 29 moves the malfunction prevention plate 27 to the right via the tapered groove 43 of the plate 27. Therefore, the acting parts 30, 31, 32 of the playback lever PLAY, the rewind lever REW, and the fast forward lever FF correspond to the locking parts 44, 45, 46 of the malfunction prevention plate 27. Prevent movement.

FIG. 6 shows the reproduction state. i.e. regeneration lever
The action part 30 of PLAY is the tapered surface 35 of the sliding plate 26
This is a general configuration in which the sliding plate 26 is moved one step to the right against the spring 28 and then locked by the locking part 40. In the rewinding and fast-forwarding states, similarly to the above-mentioned playback, the operating parts 31 and 32 slide on the tapered surfaces 36 and 37 of the sliding plate 26, and also move the sliding plate 26 to the right against the spring 28. This is a general configuration in which the lock is then locked by locking portions 41 and 42. Since the pause operation is a special configuration, it will be described later. The stop operation uses a common configuration. That is, when performing a stop operation from the playback state shown in FIG. 6, the action portion 33 of the stop lever STOP slides on the tapered surface 38 of the sliding plate 26
When the sliding plate 26 is moved to the right against the spring 28, the action part 30 of the regeneration lever PLAY moves against the sliding plate 26.
The playback lever PLAY is released from the locking portion 40 and returns to its original position via the spring 21 unique to the playback lever PLAY. The stop lever is also used for rewinding and fast forwarding.
When the sliding plate 26 moves to the right due to the STOP operation, the rewind and fast forward lever REW, the FF action part 31,
32 are released from the locked state by the locking portions 41 and 42 of the sliding plate 26, respectively, and return to their original positions via springs 22 and 23 unique to each lever REW and FF.

In this way, each operating lever REC, PLAY,
REW, FF, and STOP can be operated with a light touch by only applying a force that resists the lever's own spring (which has a small elastic force).

Next, the operation levers REC, PLAY, REW,
This section explains the mode switching drive mechanism using FF, PAUSE, and STOP operations. The switching mechanism of the present invention performs mode switching using the power of the performance drive motor M in order to reduce the pressing force of each operating lever. That is, as particularly shown in FIG.
A reference gear 51 and a reference roller 52 are provided on a capstan shaft 50 of a flywheel 49 which is drivingly connected to a shaft 47 of a flywheel 49 via a belt 48.
1 and roller 52 as reference, each lever REC,
The mode mechanisms selected by any of the PLAY, REW, FF, and PAUSE operations are linked together. The structure and operation related to each mode switching will be explained below.

Playback Mode Switching Operation (FIGS. 7 to 12) Switching of the playback mode is performed using the operating lever PLAY. As shown in FIG. 7 (a partial bottom view of FIG. 2), the operating lever PLAY is provided with an operating portion 53 that protrudes toward the drive mechanism. The acting portion 53 is connected to the base chassis CA of the drive mechanism as shown in FIG.
(See FIG. 1) corresponds to one end portion 56 of a swinging rod 55 that is pivotally connected to a shaft 54 provided in the shaft 54 (see FIG. 1). As shown in FIG. 8, one end 56 of the swinging rod 55 has the operating portion
A tapered surface 57 is formed on the side corresponding to 3.
An operating part 53 provided on a lever PLAY that is slidably operated in a direction perpendicular to the swinging rod 55 slides on the tapered surface 57 of one end 56 of the swinging rod 55, and the swinging rod 5
The swinging rod 55 is wound around the shaft 54 and has a pin 58 projecting to the base chassis CA, and an end portion 56 provided on the swinging rod 55.
A spring 6 suspended from a protrusion 59 provided on the side.
0 in the direction opposite to the arrow a. Therefore, the swinging rod 55, which has been rotated in the direction of the arrow a through its operating portion 53 and tapered surface 57 by the ON operation of the operating lever PLAY, is rotated by the spring 60 by the OFF return operation of the operating lever PLAY. Return.

As shown in FIG. 9, one end 5 of the swinging rod 55
A pin 61 is provided at the tip of the other elongated portion of 6, and this pin 61 engages with the reference gear 51 of the capstan shaft 50 and operates a cam lever 62 that slides the performance plate 3 shown in FIG. 1 into the performance state. The rotary drive plate 63 is provided on one side of the rotary drive plate 63. The rotary drive plate 63 has a gear portion 64 that meshes with the reference gear 51 and a play portion 64a that does not mesh with the gear 51 formed around it. Further, on one side of the driving plate 63 facing the pin 61 of the swinging rod 55, there are engaging portions 65, 66 where the pin 61 locks the pin 61 through the bias of the spring 60 of the swinging rod 55.
, and before the pin 61 comes off from either the engaging part 65 or 66 and is locked to the next stage engaging part 66 or 65 as the drive plate 63 rotates, the pin 61 comes into contact and is driven. Stoppers 67 and 68 for preventing rotation of the plate 63 are formed near each of the engaging portions 65 and 66. Furthermore, the engaging portions 65 and 66 and the stopper 67 are provided on the other surface side of the driving plate 63.
Cam parts 69 and 70 corresponding to 68 are formed. The cam lever 62 that slides the performance plate 3 between the playing state and the non-playing state is connected to this cam portion 6.
9,70.

That is, the cam lever 62 is pivotally connected to a shaft 71 fixed to the base chassis CA, and one end is connected to the spring 7.
2, and at the other end, as particularly shown in FIG. A pin 76 that abuts the portions 69 and 70 is provided. The cam portions 69 and 70 that the pin 76 comes into contact with have starting end contact surfaces 77 and 78.
, eccentric circular arc surfaces 79 and 80, and end abutment surface 81,
82. That is, as shown in FIG. 9, when the playback lever PLAY is in the OFF state without being operated, the cam lever 62 is urged in the rotational direction b via the spring 72, and the pin 76 is pressed against the one starting end contact surface 77. The contact surface 7 is in a state of pressure contact and is in contact with the contact surface 7.
7 and the pin 76 are in a positional relationship that biases the drive plate 63 in a counterclockwise direction. However, rotation of the driving plate 63 in the counterclockwise direction is prevented because the pin 61 at the tip of the swinging rod 55 is locked to one engaging portion 65 formed on one side of the driving plate 53. . Therefore, when the regeneration lever PLAY is turned on from the virtual line to the solid line as shown in FIG. The swinging rod 55 is rotated via the surface 57 in the direction of arrow a in FIG. 9 against the spring 60. Therefore, the pin 61 of the swinging rod 62 is disengaged from the engagement portion 65 on one side of the drive plate 63, and the drive plate 63 is pressed against the starting end contact portion 77 of the cam portion 69 on the other side by the pressure of the pin 76 of the cam lever 62. It rotates counterclockwise in response to the 1st
FIG. 0 shows this state, and as the drive plate 63 rotates, one gear portion 64 formed around the plate 53 meshes with the reference gear 51 of the capstan shaft 50. When the drive plate 63 is further rotated counterclockwise by being interlocked with the reference gear 51 in this way,
As the gear portion 64 of the drive plate 63 is disengaged from the reference gear 51, the pin 76 of the cam lever 62 moves from the starting end abutting surface 77 to the end abutting surface 81 along the eccentric arc surface 79, and as a result, the cam lever 62 is rotated in the direction of arrow c against the spring 72, as shown in FIG. FIG. 12 shows this performance state, in which the performance plate 3 is moving in the direction of arrow b. The pin 61 of the swinging rod 55 is connected to the drive plate 63.
The pin 76 of the cam lever 62 is engaged with the stopper 68 of the cam lever 62 and the terminal contact surface 81 is engaged with the connecting portion 7 .
The sliding state of the performance plate 3 in the performance direction is maintained through the slider 5. At this time, as shown in FIG. 11, the pin 76 of the cam lever 62 and the cam portion 70
The position of contact with the end contact surface 81 is such that the pin is biased by the spring 72 and rotates the drive plate 63 counterclockwise. Therefore, by turning off the playback lever PLAY, the lever PLAY is turned off.
When the lever returns to the position indicated by the imaginary line in FIG. 7, the swinging rod 55 is moved in the direction indicated by the arrow a shown in FIG. The pin 61 is rotated in the opposite direction via the spring 60 to disengage the stopper 68 of the drive plate 63, and the engagement portion 65 with which the pin 61 was initially engaged is rotated 180 degrees. The regeneration lever is engaged with a similar engagement portion 66 formed at the rotation position.
It becomes ready for the next operation by PLAY. At this time, the pin 76 of the cam lever 62 is removed from the terminal end abutting surface 81 of the cam portion 69 by counterclockwise rotation of the drive plate 63, and moved to the starting end abutting surface 78 of the next stage cam portion 70. At the same time, the connecting portion 75 of the cam lever 62
to the non-playing state (Fig. 1).
Return to position. The driving plate 63 is provided with the engaging portions 65, 66, stoppers 67, 68, and cam portions 69, 70 so that one operation can be performed every 180 degrees.

Recording mode switching operation Recording mode switching operation is performed using the recording lever REC. First, during recording, the open state or closed state of the erroneous recording prevention section 83 provided on the back of the cassette B set on the supply reel 1 and take-up reel 2 is detected.

That is, as shown in FIG. 1, FIG. 13, and FIG.
An error recording prevention member 85 having a number 4 is provided.
The member 85 is formed in an L-shape, has the protrusion 84 formed in its upper part, and is integrally provided with an operating rod 88 loosely fitted in a long hole 87 at the rear of a sliding plate 86 provided on the drive side in its lower part. , and is further pivotally connected to a bearing portion 90 of the chassis CA via a shaft 89 formed at the center. Therefore, when an unrecorded cassette B with the erroneous recording prevention section 83 in the closed state is loaded, the erroneous recording prevention section 83 changes from the state shown in FIG. 13 to the state shown in FIG. 14 via the protrusion 84. At the same time, the sliding plate 86 is rotated in the direction of arrow d via the operating rod 88 at the bottom of the error-recording prevention member 85, which is loosely fitted into the elongated hole 87 at the rear end of the sliding plate 86. make it slide.

The sliding plate 86 is slidably provided on the shaft 91 of the chassis CA through a long hole 92 as shown in FIGS. 2 and 17, and the front side is connected to the seesaw member 1 described later
It is held via a spring 93 similarly suspended on a pin 58 provided in the chassis CA so as to contact the side of one bearing 116 of the shaft 115 of No. 11 and to pull the sliding plate 86 rearward. There is.
Further, as shown in FIGS. 16 and 17, the sliding plate 86 has a lock portion 95 that abuts the protrusion 94 of the recording lever REC to prevent the lever REC from turning on. A notch 96 that enables the lever REC to be turned on when the cassette B is moved in the direction of the arrow d in FIGS.
is formed. In this way, the recording lever REC can be turned on, and when it is operated from the virtual line in Fig. 16 to the state shown in the solid line, recording is performed by a configuration similar to that of the playback mode switching operation (Figs. 7 to 12). state. That is, as shown in FIG.
The REC is provided with an action portion 97 that protrudes toward the drive mechanism side. As shown in FIG. 9, the acting portion 53 is connected to a shaft 54 provided on the base chassis CA (see FIG. 1).
It corresponds to the other end 98 which is continuous with the one end 56 of the swinging rod 55 which is pivotally connected to the swing rod 55 . As commonly shown in FIG. 8, the end portion 98 of the swinging rod 55 is formed with a tapered surface 99 corresponding to the acting portion 97.
An action part 97 provided on a lever REC that is slidably operated in a direction perpendicular to the swinging rod 55 slides on a tapered surface 99 of an end 98 of the swinging rod 55, thereby causing the swinging rod 55 to slide.
Rotate in the direction of arrow a. Then, in the same manner as described above when switching the playback mode, the pin 61 at the tip of the swinging rod 55 is removed from the engagement portion 65 or 66 of the drive plate 63, and the drive plate 63 is rotated by the reference gear 51.
Cam 69 or 70 of drive plate 63 and cam lever 62
The cam lever 62 is rotated about the shaft 71 against the spring 72 through the action of the pin 76, and the performance plate 3 is placed in the recording state (in the direction of arrow b of the performance state) via the connecting portion 75. make it slide.

At this time, Figures 1, 13 to 15, and 1
As shown in FIG. 7, an operating plate 101 is provided which engages with the other end 100 of the cam lever 62 as the cam lever 62 rotates. The actuating plate 101 is pivotally connected to a shaft 102 of the base chassis CA, and connected via a spring 105 to an arm 104 which is also pivotally connected to the shaft 102 and is operatively connected to a recording switch (not shown) via a spring 103. are connected. Further, as shown in FIGS. 13 to 15, the actuating plate 101 is connected to the shaft 1 through the spring 105.
02 direction.

Further, the actuating plate 101 is provided in the recording switch via a spring 103 so as to come into contact with the side surface 106 of the arm 104 which is about to rotate clockwise in FIG. a stopper piece 109 that holds the actuating plate 101, which is about to rotate due to this bias, in contact with a pawl 108 projecting to the chassis CA at a certain position, and the other end of the cam lever 62. 100
When recording, the actuating plate 101 and the arm 104 interlocked with the actuating plate 101 are rotated in the counterclockwise direction in FIG. It forms a working piece 110. Actuation plate 101
As shown in Figure 13, this operating piece 1 is used except when recording.
10 is suspended in the direction of the shaft 102 by a spring 105 so that it does not come into contact with the other end of the cam lever 62 (for example, see FIG. 11 showing the playback state). 111, it slides in the direction of the shaft 102 against the spring 105, as shown in FIGS. 14 and 15, and comes into contact with the other end 100 of the cam lever 62. As shown in FIG. 16, the seesaw member 111 consists of one end 113 that corresponds to the operating piece 112 of the recording lever REC, and the other end 114 that abuts one side of the operating plate 101.
is pivotally connected to the bearing portion 116.

Therefore, as shown in Figure 16, the recording lever REC
When is turned on from the virtual line to the solid line state, the action piece 112 of the lever REC presses one end 113 of the seesaw member 111 in the direction of arrow e, as shown in FIG. 15, and the other end of the seesaw member 111 114 slides the actuating plate 101 in the direction of the axis 102 indicated by the arrow f via the spring 105, so that the actuating piece 110 of the actuating plate 101 comes into contact with the other end 100 of the cam lever 62. Then, when the cam lever 62 is rotated from the imaginary line shown in FIG. 17 to the position shown by the solid line due to the rotation of the drive plate 63 by the reference gear 51, the other end 100 of the cam lever 62 presses the action piece 110 of the actuation plate 101. The actuating plate 101 is rotated counterclockwise, and the interlocking piece 107 of the actuating plate 101 presses the side surface 106 of the arm 104, causing the arm 10 to rotate.
4 counterclockwise against the spring 103, a recording switch (not shown) connected to the spring 103 is turned on.

When the recording lever REC is turned off, the swinging rod 55, which had been rotating against the spring 60 from the state shown in FIG. The pin 61 at the tip comes off the stopper 68 and rotates the drive plate slightly, and the cam lever 62
The pin 76 returns to the contact surface 77 or 78 of the drive plate 63, and the playback or recording drive is started as shown in FIG. Then, the performance plate 3 is returned to its original position via the connecting portion 75 of the cam lever 62. On the other hand, due to the return of the recording lever REC, the operating piece 112 of the lever
14 and 15 through the seesaw member 111.
The state shown in the figure is returned to the state shown in FIG. 13, and the actuating plate 101 is returned via the spring 105. Of course, the other end 100 of the cam lever 62 also
2 returns via the spring 72, as shown in FIG. 17, it returns from the solid line position to the imaginary line position (same as the position in FIG. 2).

Switching between rewind mode and fast forward mode (Fig. 2, 1)
(Figures 8 and 19) Switching between the rewind mode and the fast forward mode is performed using the rewind lever REW and the fast forward lever FF. The levers REW and FF have operating pieces 117 and 117, as shown in FIG.
118 respectively. The working piece 117,1
18 is a contact piece 125 of the rotating pieces 123, 124, which is pivotally attached to the bent pieces 119, 120 bent from the chassis 7 of the operating mechanism 6 via pins 121, 122;
126. Further, the rotating piece 12
3,124 upper end (in Figure 3) piece 12
7,128 is the base chassis as shown in Figure 18.
This corresponds to both ends 132 and 133 of a spring 131 of an actuating member 130 which is pivotally connected to a shaft 129 of the CA. The actuating member 130 is wound around the shaft 129 and both ends 132 and 133 are connected to the rotating piece 12.
3 and 124, and is held at compatible upper portions 135 and 136 of a long base rod 134 that is integral with the operating member 130.

Further, the extending portion 141 of the operating member 130 is connected to a switching plate 139 to which idlers 137 and 138 attached to the supply reel 1 and the take-up reel 2 are respectively pivoted.
It is fitted into the engaging portion 140 at one end of the. Switching plate 1
39 is connected to the shafts 142, 143 of the base chassis CA through long holes 144, 145 in FIGS. 18 and 19.
The idler 137 is provided to be slidable in the directions of arrows g and h in the figure, and one of the idlers 137 is an intermediary roller pivotally connected to the tip of an arm 146 which is similarly pivotally connected to the shaft 143. 14
7, and the rotational force of this idler 137 is interlocked and connected to the supply reel 1 in the winding direction. The other idler 138 interlocks and connects the rotational force of the reference roller 52 of the capstan shaft 50 to the take-up reel 2 in the fast forwarding direction.

FIG. 18 shows the switching state of the rewind mode. When the rewind lever REW is turned on, the rotary piece 123 is rotated via the operating piece 117 of the lever, and the actuating member 130 is rotated via the actuating piece 117 of the lever. One end 132 of the spring 131 is pressed, and the switching plate 139 is slid in the direction of arrow g via the extending portion 141 of the actuating member 130. At this time, each of the rolls 52,
147, 137 and the supply reel 1 are in the attached state and in the unwinding state.

On the other hand, FIG. 19 shows the switching state of the fast-forward mode, and when the fast-forward lever FF is turned on, the rotating piece 124 is rotated via the operating piece 118 of the lever, and the operating member The other end 133 of the spring 131 of 130 is pressed, and the actuating member 1
The switching plate 139 is slid in the direction of arrow h via the extending portion 141 of 30. At this time, each of the rollers 52, 138 and the take-up reel 2 are brought into contact with each other and enter a fast-forwarding state.

Pause mode switching (Figures 20 to 27) Pause mode switching is performed by the pause lever PAUSE. The pause lever PAUSE is the second
As shown in FIG. 1, a push mechanism 148 is provided which locks the lever in the on state with one press operation and releases the locked state and turns it off with two press operations. As shown in FIGS. 25 to 27, this mechanism 148 has a pin 14 attached to the chassis 7 of the operating lever group.
An engaging member 151 is provided to be fixed to the free end of a swingable book plate 150 that is pivotally connected via a
1 forms a groove 153 for guiding a protruding pin 152 formed on the pause lever PAUSE. The groove 153 is the spring 2 of the pause lever PAUSE.
A V-shaped groove 153a that locks the lever PAUSE in the OFF state and a V-shaped groove 153b that locks the lever PAUSE in the ON state are included within the movement range of the pin 152 by the pressing operation via the V-shaped groove 153a. , 153b for guiding the pin 152 between the tapered elements 153c, 153d, 153e, 153.
f, 153g, 153h and guide passage 153d, 1
53i. And the pin 152 is a lever
With one press of PAUSE, V-shaped groove 1 in Fig. 25 is opened.
53d to taper element 153 as shown in FIG.
c, passage 153d, taper elements 153e, 153
V-shaped groove 153 as shown in FIG.
b and hold the lever in the PAUSE ON state. In response to such linear movement of the pin 152, the swing board 150 swings via the pin 149. Needless to say, the pin 152 is held at the top position of the V-shaped grooves 153a, 153b via the spring 24 of the lever PAUSE. Next, when the lever PAUSE is pressed twice, the pin 152 returns to the V-shaped groove 153a from the state shown in FIG. 27 via the tapered elements 153g, 153h and the passage 153j, and holds the lever PAUSE in the OFF state. Similarly, the swinging board 150 swings via the pin 149 in response to the linear return movement of the pin 152.

The engaging member 151 in such a push mechanism 148 is made of an extremely small synthetic resin material with the grooves formed therein, and the swinging book plate 150 is also 15 in height.
mm, and by attaching this to the chassis 7 of the lever operating mechanism 6 via the pin 149, the lever operating mechanism 6 can be formed compactly without complicating it.

Now, the pause lever PAUSE, which is operated on and off as described above, is provided with an operating portion 154 that protrudes toward the drive mechanism as shown in FIG. As shown in FIGS. 22 to 24, the operating portion 154 corresponds to one end 157 of a swinging rod 156 that is pivotally connected to a shaft 155 provided on the base chassis CA (see FIG. 1) of the drive mechanism. As similarly shown in FIG. 8, one end 157 of the swinging rod 156 has a tapered surface 158 formed on the side corresponding to the acting portion 154, and is slidable in a direction perpendicular to the swinging rod 156. lever
An operating portion 154 provided at PAUSE slides on the tapered surface 158 of one end 157 of the swinging rod 156 to rotate the swinging rod 156 counterclockwise. The swinging rod 1
56 is biased clockwise by a spring 161 wound around a pin 159 extending therefrom and suspended from a pin 160 projecting to the base chassis CA. Therefore, the pause lever
The swinging rod 156, which has been rotated counterclockwise through its action portion 154 and tapered surface 158 when the PAUSE is turned on, returns via the spring 161 when the pause lever PAUSE is pressed twice to return.

Further, a pin 162 is provided at the other long end of one end 157 of the swinging rod 156.
62 is the reference gear 51 of the capstan shaft 50
It is disposed on one side of a second rotary drive plate 163 that meshes with the play plate 3 and slides the play plate 3 shown in FIG. The rotary drive plate 163 has a gear portion 164 that meshes with the reference gear 51 and a play portion 164a that does not mesh with the gear 51 around the rotation drive plate 163.

Further, the pin 162 of the swinging rod 156 is located on one side of the drive plate 163 facing the pin 162 of the swinging rod 156.
An engaging portion 165 is provided that locks the pin 162 through the biasing force of the pin 165, and the pin 162 is connected to the engaging portion 1
A stopper 166 is provided which comes into contact with the pin 162 to prevent the rotation of the drive plate 163 before the pin 162 is removed from the engagement portion 165 and locked again with the engagement portion 165 as the drive plate 163 rotates 360 degrees. Furthermore, a cam 168 is formed on the other side of the driving plate 163 to act on a pin 167 provided on the performance plate 3 in correspondence with the engaging portion 165 and the stopper 166.

The drive plate 168 is biased via a spring 169 to rotate counterclockwise.

As shown in FIG. 22, when the pause lever PAUSE is in the OFF state, the gear portion 164 of the drive plate 163 does not mesh with the reference gear 51, is in a position corresponding to the play portion 164a, and is moved counterclockwise via the spring 169. The pin 16 of the swinging rod 156 is biased to rotate, and the rotation due to this counterclockwise bias is caused by the rotation of the pin 16 of the swinging rod 156.
2 is locked to the engaging portion 165, so this is prevented. At this time, the pin 167 of the performance plate 3 was operated (sliding operation in the direction of the arrow) to the recording or playback state.
is located at a position where it abuts against the small circular portion of the cam 168 on the other side of the drive plate 163.

Next, press the pause lever as shown in Figure 23.
When PAUSE is turned on, the swinging rod 156 is attached to the pause lever on the tapered surface 158 of one end 157.
The action part 154 of PAUSE slides and rotates counterclockwise against the spring 161, and this pin 162
It's off from 65. At the same time, the drive plate 163 rotates counterclockwise via the spring 169, and the gear portion 164 rotates to a position where it meshes with the reference gear 51, and is interlocked with the reference gear 51 and rotates the drive plate 163. Rotate counterclockwise. As shown in FIG. 24, as the drive plate 163 is rotated by the reference gear 51, the pin 167 of the performance plate 3 in the recording or playback state is pressed through the cam 168 on the other side of the drive plate 163. 3 is temporarily moved in the direction of returning slightly (in the direction of the arrow). (At this time, performance plate 3 is
At the same time, the gear portion 164 of the drive plate 163 is disconnected from the reference gear 51, and this play portion 164 is moved against the spring 74 shown in the figure.
a reaches the position corresponding to the reference gear 51, and the drive plate 163 is further urged to rotate counterclockwise via the spring 169, but the swinging rod 15
No. 6 pin 162 contacts a stopper 166 on one side of the drive plate 163 to prevent this rotation.

Then, when the pause lever PAUSE is pressed twice, the action part 154 of the pause lever PAUSE comes off the tapered surface 158 of one end 157 of the swinging rod 156, and the swinging rod 156 returns clockwise through the force of the spring 161. At the same time, this pin 162
is removed from the stopper 166 of the drive plate 163, and the drive plate 163 is rotated counterclockwise via the spring 169, and the pin 162 is moved to the engagement portion 1.
65 and returns to the state shown in FIG.
At this time, the performance plate 3 also returns to the recording or reproducing state shown in FIG. 22.

Review operation (Figures 28 and 29) Generally, when performing fast forward or rewind operations while in the playback state, the head 4 must be pressed in the same way as when pausing to prevent the sound of the magnetic tape being transferred at high speed from being input to the head 4 in the playback state. There arises a need to temporarily move the performance plate 3 in the off direction. Here, this operation is performed by using the swinging rod 156 and the drive plate 164 in the pause mode.

That is, as shown in FIG.
A sliding plate 170 is provided in a slight gap between the CA and the performance plate 3 so as to slide via a spring 174, and is operatively connected to a brake mechanism to be described later. Forms bent pieces 171, 172 corresponding to both ends of the long base rod 134 of the operating member 130 shown in the explanation of the rewind mode and fast forward mode in FIGS. 18 and 19, and A pin 15 is provided near the bending piece 172 and extends to the swinging rod 156 that is interlocked with the pause lever PAUSE and winds a spring 161.
A tapered surface 173 corresponding to 9 is formed.

Then, as shown in FIG. 29, the performance plate 3
In the recording or playback state where the lever is sliding in the direction of arrow b (same as in FIG. When the slide plate 170 is rotated in the direction of arrow b and is slid in the same direction b as the performance plate 3 against the spring 174 through either end of the base rod 134, the slide plate 170 The tapered surface 173 on the side is the pin 15 of the swinging rod 156 that is linked to the pause lever PAUSE.
9, and the swinging rod 156 is pressed against the spring 161.
29 in the clockwise direction. Then, this pin 162 comes off from the engaging portion 166, and the state shown in FIG. 22 changes from the state shown in FIG.
The drive plate 163 is driven to the state shown in the figure, and the pin 167 of the performance plate 3 is moved to the cam 168 on the other side of the drive plate 163.
presses the playing plate 3 temporarily to the 24th position.
Return it slightly as shown in the figure.

When the fast forward lever FF or the rewind lever REW is released, the operating member 130 and the sliding plate 170 return to their original positions, the tapered surface 173 also returns to the state shown in FIG. Return to the counterclockwise direction in Fig. 29 and move to the second
The state shown in Figure 2 is reached.

Brake Mechanism (FIGS. 28 and 29) In the stop mode when the stop lever STOP is operated and when the auto-stop mechanism described later is operated, the supply reel 1 and the take-up reel 2 are fixed so as not to rotate freely. That is, as shown in FIGS. 28 and 29, there are many grooves G on the circumferential surfaces of both reels 1 and 2.
The brake pieces 175, 175 that engage with the grooves G are respectively formed on the shaft 1 of the chassis CA.
76, 176, and the spring 17
The brake pieces 175, 175 via 7, 177
The tip is constantly biased in the direction of engagement with the groove G.

Further, pins 178, 178 are formed at the rear ends of the brake pieces 175, 175, respectively, and the pins 178, 178 are in contact with the inner surface of the opening 179 of the performance plate 3, respectively. When the performance plate 3 slides in the direction of arrow b in the recording or playback state, the inner surface of the opening 179 presses the pin 178, and as shown in FIG. 29, the brake pieces 175, 1
75 is rotated against (compressed) the springs 177, 177 to remove the tips of the brake pieces 175, 175 from the grooves G of both reels 1, 2, and release the brake. Further, when the sliding plate 170 slides in the direction of arrow b against the spring 174 in the fast forward and rewind state, the sliding plate 170 moves against the brake piece 17.
5, 176 are formed with shoulder portions 180, 181 that come into contact with the pin 178, 178 forming portions at the rear end, and the brake pieces 175, 175,
176 is rotated around the shafts 176, 176, the tips of the pieces are removed from the grooves G of the reels 1, 2, and the brake is released.

Auto-stop mechanism (Figs. 28 to 31) When the recording/playback or fast-forwarding/rewinding operations are completed and the tape ends, the drive of the reels 1 and 2 is automatically stopped.

That is, the take-up reel 2 is driven by a gear 18 driven by a flywheel 49 as shown in FIG.
Reel 2 of reel shaft 183 rotated by 2
An operating piece 184 is rotatably held on the shaft 183 via a spring 185 on the bottom surface. The working piece 184 is provided with a pin 186 at one end, and the pin 186 is connected to a blocking piece 187 so that the working piece 184 rotates counterclockwise in FIGS. 1, 28 to 30 when the magnetic tape is in the stop mode. Pressure-welded through.

Like the sliding plate 170, the blocking piece 187 is pivotally connected to the gap between the base chassis CA and the performance plate 3 via a shaft 189, and the tip 190 of the blocking piece 187 pushes the operating piece 184 into the pin 186.
The blocking piece 18 is pressed counterclockwise through the
7 is biased clockwise via a spring 191. Also, this blocking piece 187 has this tip 190.
A pin 193 is provided near the abutting portion 192 of the performance plate 3, and as shown in FIG. 29, when the performance plate 3 slides in the direction of arrow b during recording or playback, the abutting portion 192 presses the pin 193 of the blocking piece 187 and the blocking piece 18
7 in the counterclockwise direction against the spring 191, so that the tip 190 touches the pin 1 of the action piece 184.
86 and release the pressure contact of the working piece 184 in the counterclockwise direction. Similarly, when the sliding plate 170 slides in the direction of arrow b during fast forwarding or rewinding, the sliding plate 1
The distal end 194 of the blocking piece 187 presses the distal end side of the blocking piece 187, causing the blocking piece 187 to rotate counterclockwise against the spring 191.
0 separates from the pin 186 of the action piece 184 and releases the pressure contact of the action piece 184 in the counterclockwise direction.

On the other hand, a long hole 198 is provided at the other end of the working piece 184, and the center of the long hole 198 is pivoted to a 195.
The detection arm 197 has a pin 196 at one end, and is rotatably and slidably provided at the other end of the detection arm 197. 19
Reference numeral 9 denotes an idle gear 200 that transmits the rotation of the gear 182 of the flywheel 49 to the reel shaft 2.
The rotating body 199 is a rotating body driven by a gear 201 (see FIG. 2) provided in the
Cams 203 and 204 eccentric to this output shaft 202
and an engagement element 205 formed on the same circumference as the longest radius of one cam 204 and the shortest radius of the other cam 203 around the output shaft 202, and this output shaft 202 It is pivotally supported by a swing arm 207 that is pivotally connected to a shaft 206 of the gear 200, and the arm 207 is supported by a spring 2.
The stopper 209 is biased counterclockwise via the stopper 209.
prevents this rotation. Further, the rotating body 1
The output shaft 202 of 99 is pivoted at the center 210 and has one end attached to a lever release sliding plate 26 with a protrusion 2 formed thereon.
11 is in contact with the other end 216 of the actuating plate 212.

Further, the idle gear 200 is rotatably supported 206 on a bearing plate 217 that bears the capstan shaft 50 of the flywheel 49, and this bearing plate 217 is provided with a pin 214 that abuts one end of the performance plate 3. There is. This performance plate 3
The pin 214 is attached to one end of the spring 20.
When the pressing piece 215 that presses against the magnetic head 8 and the playing plate 3 move in the direction of attaching the magnetic head to the tape, a pin is attached so that the idle gear 200 is attached to the gear 182 of the reel shaft 2 via the spring 208. A tapered surface 213 is formed to move the bearing plate 214 and rotate the bearing plate 217 counterclockwise.

During recording/playback or fast forwarding, the blocking piece 187 is separated from the pin 186 of the action piece 184, so when the reel shaft 2 rotates counterclockwise to perform a winding operation, the bottom surface of the reel 2 The operating piece 184, which is pressed against the reel via a spring 185, rotates counterclockwise, that is, in the direction of rotation of the reel shaft 2. Therefore, the pin 196 of the detection arm 197 is rotated in pressure contact with the circumferential surface of the cam 203 inside the rotating body 199 which rotates in the same direction as the reel 2. After that, when the magnetic tape is wound and the rotation of the reel 2 stops, the operating piece 184 becomes in a non-driven state with the reel 2, and the pressing force of the pin 196 of the detection arm 197 against the cam 203 is released, and the pin 196 continues to rotate. The rotating body 199 moves along the circumferential surface of the cam 203 and moves away from the circumferential surface of the cam 203 from the circumferential position of the longest radius of the cam 203 to follow a trajectory centered on the output shaft 202 corresponding to the longest radius of the cam 203. Moving. When the movable pin 169 engages the engagement element 205 provided on this track, the pin 1
Since the detection arm 197 provided with the detection arm 96 is pivotally held on the fulcrum 195, the rotating body 199 pivotally attached to the arm 207 rotates clockwise against the spring 208.

The output shaft 202 rotates the actuating plate 212 counterclockwise to move the lever release sliding plate 26 (lever locking sliding plate) to the right through the pin 211 against the support spring 28. Recording/playback lever connected to lever release sliding plate 26
PLAY, fast forward lever FF is released.

Further, during rewinding, the blocking piece 187 is similarly separated from the pin 186 of the action piece 184, and when the reel shafts 1 and 2 rotate clockwise opposite to the above to perform the rewinding operation, the reel 2 Spring 1 on the bottom
The actuating piece 184, which is pressed through the reel 85, rotates clockwise, that is, in the unwinding direction in which the reels 1 and 2 rotate. Therefore, pin 1 of detection arm 197
96 is rotated in pressure contact with the circumferential surface of the outer cam 204 of the rotating body 199 which rotates in the opposite direction to the reels 1 and 2. After that, the magnetic tape is wound onto reels 1 and 2.
When the rotation of the operating piece 184 stops, the operating piece 184 becomes in a non-driven state with the reel 2, and the pin 196 of the detection arm 197
The pressing force on the other cam 204 is released, and
The pin 196 moves along the circumferential surface of the cam 204 of the rotary body 199 that continues to rotate, and moves away from the circumferential surface of the cam 204 from the circumferential surface position of the shortest radius of the cam 204 to the position of the cam 204 centered on the output shaft 202. Move along the trajectory corresponding to the shortest radius. and the pin 1
96 is provided on this track, the engagement element 20
5, the detection arm 197 provided with the pin 196 is held at the fulcrum 195, so when the rotating body 199 pivoted to the arm 207 rotates clockwise against the spring 208, this output The shaft 216 rotates the operating plate 212 counterclockwise and moves the lever release sliding plate 26 (lever locking sliding plate) to the right through the pin 211 against the support spring 28. Rewinding lever REW connected to the release sliding plate 26
I am trying to release it.

Also, when you operate the playback lever during recording/playback,
When the performance plate 3 equipped with a magnetic head etc. moves in the direction in which the head comes into contact with the magnetic tape, the pressing piece 215 formed on one side of the performance plate 3 presses against the pin 214 of the bearing plate 212 of the capstan shaft 50.
The pin 214 moves along the tapered surface 213 and the bearing plate 217 rotates counterclockwise via the spring 208. At this time, the bearing plate 217
An idle gear 200 pivotally attached to one end of the take-up reel shaft 2 rotates via a bearing plate 217 to come into contact with the regeneration gear 182 of the take-up reel shaft 2. The rotation of the flywheel 49 is controlled by gear 51 and idle gear 200.
The signal is transmitted to the reel shaft 2 via. Conversely, when the performance plate 3 returns, the pin 2 of the bearing plate 217
14 returns to the pressing piece 215 position via the tapered surface 213, rotates the bearing plate 217 clockwise around the capstan shaft 50, and connects the idle gear 200 pivoted to one end of the bearing plate 217 to the gear 182 of the reel 2. The rotation transmission of the flywheel 49 to the reel 2 is released.

Eject mechanism (Figs. 1, 12 to 14)
(Figure) Cassette B attached to reels 1 and 2 is ejected via a shaft 219 that is pivotally connected to a raised part 218 on the side of base chassis CA and a spring 220, as shown in Figures 1 and 12 to 14. This is done by the ejection lever EJECT, which is energized by the

The extending end 221 of the eject lever EJECT is fitted into an engaging portion 226 of an extending piece 225 of an eject sliding plate 224 that is slidably provided on the shaft 222 of the chassis CA through an elongated hole 223. There is. In addition, a long hole 2 is provided at the rear end of the eject sliding plate 224.
A rising piece 228 having a shape of 27 is provided, and a long hole 227 of this rising piece 228 has a pin 2 of a rotating member 230 pivotally connected to the chassis CA via a shaft 229.
31 is fitted. The rotating member 230 has an engaging portion 232 at one end that engages with a protrusion (not shown) formed on the side surface of the cassette mounting case, and the other end 23
3 is a sliding plate 86 that interlocks with the error recording prevention member 85;
It is arranged so that it comes into contact with the action part 234 of the.

Further, the ejection sliding plate 224 is provided with a notched groove 236 in which a tapered surface 235 is formed.
A bent portion 240 at one end of a trochanter 239 pivotally connected to a shaft 238 of the base chassis CA into which the elongated hole 237 of the sliding plate 224 is inserted is fitted into the notch groove 236, and the other end of the trochanter 239 is fitted into the notch groove 236. 241 is adapted to abut against the lever release sliding plate 26.

In this way, move the ejection lever EJECT to axis 21.
9 against the spring 218, the eject sliding plate 2 is pushed through the extending end 221 of the lever.
24 to its elongated holes 223, 237 and the shaft 222,
238 in the direction of arrow x in FIGS. 12 to 14. As a result, the rotating member 230, which is engaged with the protrusion of the cassette mounting case through the engaging portion 232 in the mounted state, changes the length of the upright piece 228 of the sliding plate 224 from the state shown in FIGS. Hole 2
27 and the pin 231 of the member 230, the cassette mounting case is disengaged from the protrusion of the cassette mounting case which is rotated counterclockwise, and the cassette mounting case takes the cassette B to the ejecting state via its own spring. do. At the same time, or slightly earlier than the ejecting operation, the trochanter 239 moves to the plate 2 on which the bent portion 240 slides.
24 rotates counterclockwise via the shaft 238, and this other end 241 moves the lever release sliding plate 26 against this spring 28 as shown in FIGS. Slide it to the right in Figure 12 to release the lever that is in the operating state. The other end 233 of the rotary member 230 presses the operating portion 234 of the sliding plate 86 to cause it to slide, and when playing back a recorded cassette, the protrusion 84 of the error-recording prevention member 85 is pressed against the operating portion 234 of the sliding plate 86. It separates from the erroneous recording prevention part 83 (opening part) on the back and allows the cassette to move freely in the ejection direction.

Finally, the assembly configuration on the drive section side will be explained.

As shown in FIG. 2 (drive section side), the base chassis CA includes a recording and playback drive plate 63 interlockingly connected to the reference gear 51 of the capstan shaft 50;
An idle gear 200 that interlocks with the pause drive plate 163 and the rotating body 199 is formed, and a roller 137 that interlocks with the reel 1, an idler 138 that interlocks with the reel 2, and a roller 1.
47 is attached via shafts 142, 143, and then integrally provided to the flywheel 49 and capstan shaft 50 (actually, it is provided integrally via an elastic member such as a spring). By inserting the reference gear 51 and the reference roller 52 into the holes in the chassis CA, the reference gear 51 is connected to the drive plates 63 and 1.
63 and the position where it meshes with the idle gear 200,
Further, the reference roller 52 is set at a position corresponding to the idler 138 and the roller 147, and furthermore, the motor M is fixed and the lower end of the capstan shaft 50 of the flywheel 49 (a shaft protruding to the opposite side forming the capstan of the flywheel) is set. A motor base 242 rotatably bearing a motor base 242 is attached to a base chassis CA with shafts 243 and 244, and the actuating plate 1
01 and the shaft to which the arm 104 is pivotally connected, and the pole 1 that abuts the stopper piece 109 of the actuating plate 101.
At this time, the belt 48 is suspended between the shaft 47 of the motor M and the flywheel 49 for assembly.

As is clear from the above embodiments, the present invention provides brake pieces 175 and 1 for preventing idle rotation of drives 1 and 2.
75, recording lever REC and playback lever PLAY
A playing plate 3 that slides on the base chassis CA by operating the tape to bring the magnetic heads 4 and 5 into contact with the tape in a playing state, and a sliding plate 17 that slides by operating the fast forward lever FF and the rewind lever REW.
0, and pins 178, 178 fixed to the brake pieces 175, 175 are provided with openings 179 of the performance plate 3 during recording and playback, and fast forward and
Shoulders 180, 181 of sliding plate 170 during rewinding
The brake pieces 175, 17 are brought into contact with each other.
Since the sliding plate 170 and the brake pieces 175, 175 are interposed between the performance plate 3 and the chassis CA, the entire brake mechanism is simplified and the cause of failure is reduced. The tape recorder can be made more compact by being easily incorporated into a small space, and production efficiency can also be improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view showing the cassette mounting section of a so-called front cassette deck type tape recorder, which has a cassette mounting section on the front side of the deck, and FIG. 3 is a back view showing the mechanism side, FIG. 3 is a view taken along line A-A in FIG. 1 showing the lever operating mechanism, and FIGS. 4 to 6 are
The figure is a partial action explanatory diagram of Fig. 3, Fig. 7 is a partial explanatory diagram of the playback lever, and Fig. 8 is the relationship between the action part of the playback lever and the tapered surface of one end of the swinging rod, and the action part of the recording lever. The relationship between and the tapered surface of one end of the swinging rod,
and 9th partial view showing the relationship between the action part of the pause lever and the tapered surface of one end of the swinging rod, respectively.
Figures 11 to 11 are operational explanatory diagrams showing the relationship between the recording/playback lever, the drive plate and the cam lever, Figure 12 is a front view showing the sliding state of the performance plate, and Figure 13 is a front view showing the sliding state of the performance plate.
Figures 14 to 14 are operation explanatory diagrams showing the recording operation section, erroneous recording prevention section, and eject mechanism, Figure 15 is an operation explanatory diagram showing the relationship between the cam lever and the recording operation section, and Figure 16 is a section of the recording lever. Explanatory diagram, No. 17
The figure is an operation explanatory diagram showing the recording operation and the error recording prevention section.
Figures 18 and 19 are operation explanatory diagrams showing the rewind and fast forward switching mechanisms, Figures 20 and 21 are partial explanatory diagrams of the pause lever, and Figures 22 to 24 are diagrams showing the pause lever and the drive plate. , Figures 25 to 27 are partially enlarged diagrams showing the push mechanism of the pause lever, Figures 28 and 29 are diagrams showing the review operation, reel brake mechanism, and FIG. 30 is an operation diagram showing the auto-stop mechanism, and FIG. 31 is a sectional view of the take-up reel. PLAY...playback lever, REC...recording lever,
FF...Fast forward lever, REW...Rewind lever, CA
...Base chassis, 1, 2...Drive reel, 3
... Performance plate, 170 ... Sliding plate, 175,
175...Brake piece, 184...Action piece, 18
7... Blocking piece.

Claims (1)

[Scope of utility model registration request] Brake pieces 175, 175 that prevent free rotation of the drive reels 1, 2, slide on the base chassis CA by operating the recording lever REC and the playback lever PLAY, and bring the magnetic heads 4, 5 into contact with the tape in a playing state. performance plate 3 and fast forward lever
FF and a sliding plate 170 that slides when the rewinding lever REW is operated, and the brake pieces 175, 1
The opening 179 of the performance plate 3 is fixed to the pins 178, 178 fixed to the pins 75 during recording and playback, and the shoulder 18 of the sliding plate 170 is fixed during fast forwarding and rewinding.
0 and 181, respectively, and the brake piece 1
75,175, while the sliding plate 170 and the brake piece 175,1
75 is interposed between the performance plate 3 and the chassis CA.