JPS5911978B2 - Ejection prevention device for cassette type recording/playback equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention allows a tape wound on a pair of reels to be loaded into a cassette housed in a housing at a predetermined position, and then switched to a recording or playback mode. Relating to an ejection prevention device in a cassette type recording and reproducing apparatus configured such that the tape is pulled out of the cassette through an opening 35 formed on the front side of the cassette and brought into contact with a recording/reproducing head, and then the tape is run. The present invention relates to a device that is most suitable for application to devices such as a tape recorder and a TR.

As is well known, in this type of device, if the force set is accidentally ejected while the tape is running or paused, the tape and tape drive system etc. can be instantly damaged. There is a danger that such ejects may occur, and it is necessary to prevent such ejects as much as possible. However, most conventional devices of this kind have a structure that prevents ejection in relation to the forward movement of the head board during recording or playback, so Even if ejection can be prevented, there are cases where ejection cannot be prevented in other modes such as fast forward, rewind, pause, etc., and the reliability is unreliable.

The present invention aims to correct the above-mentioned defects and provide a highly reliable ejection prevention device for a force setting type recording/reproducing apparatus.

Embodiments of a tape recorder to which the present invention is applied will be described below with reference to the drawings.

FIG. 1 shows the entire tape recorder, which constitutes a so-called component type tape deck.
A force set holder (hereinafter simply referred to as a holder) 2 for setting a force, a pause button 10 arranged horizontally from the right, a record button 3, a fast forward button 4, a play button 5, and a stop button 6.
, a group of push buttons such as a rewind button 7, an eject button 8, and a plurality of other knobs, meters, a pilot lamp, etc. are provided.

The push buttons 10, 3, 4, 5, 6, and 7 are configured as so-called feather touch push buttons. This tape recorder (in this case, a large cassette 9 is used, and this power set 9 is inserted into the holder 2 from above and then installed at a predetermined device position by rotating the holder 2. ing.

2 and 3 show a large cassette (hereinafter simply referred to as a force set) 9, and this force set 9
The force set housing 11 is larger in outer diameter and thickness than a normal compact cassette.

A pair of reels 12 and 13 for supply and take-up, which are single-flange reels, are rotatably provided within the force set housing 11. On the other hand, a magnetic tape (hereinafter simply referred to as tape) 14, which has a larger structure than a tape for a normal compact cassette, is wound around both reels 12 and 13 with both ends fixed to them, and is wrapped around the cassette casing 11. A pair of left and right tape guides 15a provided inside the
15b and guide rollers 16a, 16b, and is passed along the front surface of the force setting housing 11.
A horizontally elongated opening 17 is formed on the front side of the force setting housing 11 and is open over almost the entire width thereof, and the tape 14 is passed through this opening 17 so that it can be drawn out of the force setting housing 11. ing. In addition, the upper and lower walls on the front side of the force setting housing 11 are provided with a pair of notches 18a and 18b at both left and right end portions for inserting the pinch rollers, and a pair of left and right tape shift pins arranged slightly inside these notches 18a and 18b. Notches 19a and 19b are formed. Note that these notches 18a, 18b, 19a, and 19b are each formed in a substantially U-shape, and their front sides are open at the opening 17, respectively. Further, at a position offset toward the front side of the force setting housing 11, loading holes 20a and 20b for inserting a pair of left and right loading guides are formed in the upper and lower walls thereof. Furthermore, on the front surface of the force setting housing 11, there are a pair of left and right front lids 21a, 21b for opening and closing the front surfaces of the notches 18a18b at positions outside the tape 14.
is provided. These front covers 21a and 21b are approximately L-shaped and arranged symmetrically, and are pivoted to the upper and lower walls of the force setting housing 11 by a pair of upper and lower fulcrum pins 22a and 22b. It is freely supported. Both front lids 21a and 21b are rotated and biased to the closed state as shown by solid lines in FIG. It is constructed so that it can be opened in a double-door shape as shown by the chain line in FIG. 3 against springs 23a and 23b. In the figure, 24a and 24b are a pair of left and right reel shaft insertion holes formed in the upper and lower walls of the force setting housing 11, and 25 is a notch for inserting a brake release lever formed in the center of the bottom surface of the force setting housing 11. be. Also, a pair of brake levers 26a, 26b are provided in the force set housing 11, and these brake levers 26a, 26b are normally connected to both reels 12.
, 13 to prevent rotation of these reels 12, 13 due to vibration or the like. Further, a pair of accidental erasure prevention pieces 30a and 30b are attached to the corners of both left and right lower ends of the force set housing 11. Next, Figure 4-1
The mounting device for the force set 9 will be explained with reference to FIG. 1F.

First, the holder 2 has a semicircular shape in cross section, and includes a force setting receiver 29 that opens upward, a pair of left and right side plates 28a and 28b integrally formed on both left and right ends of the holder 2, and the front surfaces of these side plates 28a and 28b. The front cover 27 is detachably attached to the side as described later.

The force set 9 is inserted from above between the side plates 28a and 28b in a state almost parallel to the front cover 27, and is inserted into the force set receiver 29.
It is designed to be kept inside. On the other hand, a chassis 31 is installed vertically within the cabinet 1, and a pair of left and right support plates 32a and 32b for pivotally supporting the holder 2 are fixed to the front surface of the chassis 31.
The holder 2 is attached to a pair of left and right fulcrum pins 33a, 33b implanted in a part of both support plates 32a, 32b.
It is pivotably supported at portions 8a and 28b and is configured to be rotatable. Note that an arm 34 is integrally formed on the lower end of one side plate 28a and a spring receiver 3 is fixed to a part of the chassis 31.
The holder 2 is urged to rotate counterclockwise in FIG. 6 about both fulcrum pins 33a and 33b by a return spring 36 which is a tension spring stretched between the holder 2 and the holder 5. Further, a locking pawl 37 is integrally formed in a part of the side plate 28a. Further, on the outside of one support plate 32a of the chassis 31, a lock lever 38 having a substantially L shape is rotatably supported by a fulcrum pin 39.
A lock pin 40 protruding from the upper end 38a of the support plate 3
The locking pin 40 is inserted through an insertion hole 41 formed in 2a and projected inward, and the locking pawl 37 is locked with this locking pin 40.
The lock lever 38 is moved to the 28th position by an axis return spring 43 from a tension spring tensioned between its lower end 38b and a bent portion 42 integrally formed at the lower end of the support plate 32a. It is rotated clockwise in the figure. Further, at the lower end of the support plate 32a, a lever support part 47 is formed integrally with the bent part 42 and a part of the support plate 32a.
An ejector lever 44 is provided horizontally supported between. This eject lever 44 is configured to be slidable in its longitudinal direction, and the eject button 8 is attached to its front end. The lower end 38b of the lock lever 38 is engaged with a notch 45 formed in a part of the ejector lever 44, and the lock lever 3
8, the ejector lever 44 is slidably biased forward. A pair of force setting presser springs 46 made of plate springs are attached to both left and right ends of the inner surface of the front plate 27 of the holder 2. As clearly shown in FIGS. 6 and 7, the holder 2 is inserted into the opening 48 formed in the cabinet 1, and has a return position where it projects out of the cabinet 1 as shown in FIG. 6 and is tilted; As shown in FIG. 7, it is configured to be freely rotatable about both fulcrum pins 33a and 33b between a forward movement position where it is inserted into the cabinet 1 and forms a vertical shape. At this time, when the holder 2 is rotated to the forward movement position against the return spring 36, the locking pawl 37 engages the lock pin 4.
0, the holder 2 is locked in its forward position. Further, when the eject button 8 is pressed and the eject lever 44 is pushed backward in the above state, the lock lever 38 is rotated counterclockwise as shown by the chain line in FIG. 37, the holder 2 is unlocked and moved back to the above-mentioned return position by the return spring 36. On the other hand, on the back side of the holder 2, a pair of left and right lid raising plates 49a are provided at both left and right end positions.
49b is arranged.

Parts of the lid raising plates 49a, 49b are inserted between the side plates 28a, 28b of the holder 2 and the supporting plates 32a, 32b of the chassis 31. Also, the upper ends 50a, 50b of these lid raising plates 49a, 49b
are extended inward, and these upper ends 50a, 50b
A pair of left and right lid raising claws 51a, 51b are integrally formed on the front surface of the lid. However, these both lid raising plates 49
a, 49b have three guide pins 52a, 52b, respectively.
52c is provided protrudingly. Two of these guide pins 52a and 52b are provided to protrude inside the lid raising plates 49a and 49b, and the remaining one is provided to protrude to the outside. The guide pins 52a are connected to both side plates 2 of the holder 2.
The guide pins 52b are loosely fitted into linear guide holes 53a formed in each of the side plates 8a and 28b and extending linearly in the vertical direction. are loosely fitted into the shaped guide holes 53b,
The guide pin 52c is attached to both support plates 32a, 3 of the chassis 31.
Arc-shaped guide holes 5 extending in an arc shape formed in each of the holes 2b.
3c, respectively, with a loose fit. During the reciprocating rotation operation of the holder 2, which will be described later, both lid raising plates 49a, 4
9b is the three guide pins 52a, 52b, 52c.
The holder 2 is moved in conjunction with the movement of the holder 2 by the guiding action of the three guide holes 53a, 53b, and 53c.

A substantially L-shaped brake release lever 54 is rotatably supported at the center of the lower part of the holder 2 via a horizontal fulcrum pin 55.

The lower side 54a of this brake release lever 54 is configured to be able to enter and exit the holder 2 by passing through a notch 56 formed in the lower center of the holder 2, and the upper side 54a is configured to be able to move in and out of the holder 2. It is configured so that it can come into contact with the back surface of the receiver 29. And this brake release lever 5
4 is normally rotated counterclockwise by its own weight as shown in FIG. 9, and is configured to be rotated by the holder 2 as shown in FIG. 10 when a force setting device, which will be described later, is used. Next, the mechanism of the force set mounting position where the force set 9 is installed will be explained. This force set mounting position is the chassis 31.
A pair of reel shafts 57 are provided here.
a and 57b are rotatably provided.

A pair of left and right loading guides 58a, 58b for inserting the force set 9 into the loading holes 20a, 20b are planted at right angles above the reel shafts 57a, 57b and at positions offset in the left-right direction. It is set up. The tips of both loading guides 58a, 58b are machined into a conical shape with a two-step tapered surface, and force setting pedestals 59a, 59b are integrally formed at the bases. Furthermore, both reel shafts 57a, 5
A force setting holding pin 60 is implanted in the center of the position below 7b, and this force setting holding pin 60 is inserted into a long hole 61 formed in the upper side 54b of the brake release lever 54 as shown in FIG. and insert the notch 56 into the holder 2.
It is configured so that it can be inserted into the lower end of the . On the other hand, at a position above the front force setting device position of the chassis 31,
Erasing head 63, recording/reproducing head 64, tape guide 65,
A capstan 66 and the like are provided, and a tension detection pin 67, a tape shifter 68, a pinch roller 69, etc. are provided below these.

The heads 63, 64, tape guide 65, etc. are attached to the front surface of a head board 70 that is attached to the front side of the chassis 31 at a predetermined height. Further, a plate-shaped tape guide 71 is attached to one side of the erasing head 63. The tension detection pin 67 is rotatably supported by a tension arm 72 via a fulcrum pin 73, and the tape shifter 68 is rotatably supported by a shifter arm 74 via a fulcrum pin 75. It is pivotally supported. Further, the pinch roller 69 is connected to a pinch roller arm 76.
It is rotatably supported via fulcrum pins J and V. The tension detection pin 67, tape shifter 68, and pinch roller 69 are located at the solid line in Figure 5 when the tape deck is in a mode other than playback, recording, or pause mode, and when in the above mode, they move to the position indicated by the chain line in Figure 5. is configured to be In addition, 78 is chassis 3
This is a decorative board for the chassis front cover that is attached at a predetermined height to the front side of the reel shaft 57a, 57.
b1 Both loading guides 58a, 58b, force setting presser pin 60, both heads 63, 64, tape guide 65,
The capstan 66, tension detection pin 67, tape shifter 68, pinch roller 69, etc. are inserted through this decorative plate 78 and protrude or are exposed to the front side. Next, a procedure for mounting the cassette 9 using the force set mounting device described above will be explained.

First, before the force set 9 is installed, the tape deck is naturally in the stop mode, and in this stop mode, the tension detection pin 67, the pinch roller 68, and the tape shifter 69 are respectively returned to the positions shown by solid lines in FIG. ing.

On the other hand, the holder 2 is in a backward movement position where it extends outward from the cabinet 1 and is inclined, as shown in FIG.

Initially, the force set 9 is inserted into the holder 2 in the above position from diagonally above as shown in FIG. However, at this time, both front covers 21a and 21b of the force set 9 are kept in the closed state as shown in FIG. 4, and the force set 9 inserted into the holder 2 is received by the force set receiver 29. 6th
The state is shown by the solid line in the figure. Next, when the front plate 27 of the holder 2 is pressed in the above state, the holder 2 is rotated clockwise in FIG. The force set 9 is also moved into the cabinet 1 while being rotated in the same direction.

When the holder 2 reaches the reciprocating device shown in FIG. 7, the force set 9 is correctly installed at the force set installation position. On the other hand, both front lids 21a and 21b of the force set 9 are automatically opened by the lid raising claws 51a and 51b during the installation operation of the force set 9, and at an early stage, as shown in FIG.

First, to describe the force set mounting operation, during the rotation of the force set 9 by the holder 2, the loading guides 58a and 58b are inserted relatively into the loading holes 20a and 20b of the force set 9. Ru.

Further, both reel shafts 57a and 57b are also relatively inserted into both reel shaft insertion holes 24a and 24b of force set 9, and engaged with the reel hubs of both reels 12 and 13, respectively. Further, the center portion of the lower end of the force set 9 is brought into contact with the force set holding pin 60. On the other hand, as the holder 2 rotates as described above, the force set presser springs 46 press both left and right ends of the front surface of the force set 9, so that the force set 9 presses both the loading pins 58a, 58b, the force set pedestals 59a, 59b, and the cassette. It is pressed by the presser pin 60. When the holder 2 reaches the forward movement position shown in FIG. 7, the force set 9 is in the state shown in FIGS. 5 and 8.
It is fixed in a positioned state in the vertical direction, left-right direction, and front-back direction.

At this moment, the locking pawl 37 is engaged with the locking pin 40, and the holder 2 is locked in the forward movement position, completing a series of force setting and mounting operations. Note that during the installation operation of the force set 9, the force set receiver 29 of the holder 2 comes into contact with the upper side 54b of the brake release lever 54 and presses it.
This brake release lever 54 is rotated clockwise in FIG.

As a result, as shown in FIG. 10, the lower side 54a of the brake release lever 54 is inserted into the force set 9 through the notch 25 in the center of the bottom surface of the force set 9, thereby releasing both brake levers 26a and 26b in the force set 9. The brakes on both reels 12 and 13 by these brake levers 26a and 26b are released. Next, the opening operation of both front lids 21a, 21b related to the force setting mounting operation will be explained with reference to FIGS. 11A to 11F. In addition, both lid raising plates 49a in this case
, 49b and both lid raising claws 51a, 51b are the same symmetrical movement, so only the movement of one of the lid raising plates 49a and the lid raising claws 51a will be explained here. . First, as described above, the force set 9 is inserted diagonally from above into the holder 2 in the reciprocating position, and the state is shown in FIG. 11A. is B1
The force set 9 is located at the position C1, and the force set 9 is located at the position C1.

Further, at this time, a sufficient gap t is left between the lid raising claw 51a and the force set 9. And at this time, the guide pin 52
The guide pin 52b is located at the lower end position a1 of the linear guide hole 53a, the guide pin 52b is located at the lower end position b1 of the curved guide hole 53b, and the guide pin 52c is located at the lower end position C of the arcuate guide hole 53c. They are positioned relative to each other.

Then, in the above state, the holder 2 is rotated clockwise around both fulcrum pins 33a and 33b toward the forward movement position, and the force set 9 is attached. Now figure 11B is holder 2
This shows the moment when the force set 9 is rotated by an angle θ1 from the A position to the A2 position, and at this time, the force set 9 is also rotated by the same angle θ1 and reaches the C2 position from the C1 position.

However, in this force set mounting device, during the above period, the lid raising plate 49a is rotated by an angle θ2 in a direction opposite to the rotation direction of the force set 9 from the B1 position to the B2 position.

That is, while the force set 9 is rotated clockwise, the lid raising plate 49a is rotated in the opposite direction, that is, counterclockwise.
They will actively go to pick up the enemy by their own rotation.
Therefore, during this time, the gap t between the lid raising claw 51a and the force set 9 is quickly reduced. That is, while the holder 2 is rotated from the A1 position to the A2 position, the guide pin 52b is brought from the lower end position B of the bent guide hole 53b to the bent part position B2, while the fulcrum pin 33a Since the rotating force of the guide pin 52a clockwise by an angle θ2 centered on is transmitted to the lid raising plate 49a, the guide pin 52c is located at the lower end position C of the arcuate guide hole 53c. The lid raising plate 49a approaches the force set 9 as it is rotated counterclockwise around the lid. And holder 2 is the 11th C
When the A3 position in the figure is reached, the lid raising pawl 51a is inserted between the notches 18a of the force set 9 that has also reached the C3 position, and the lid raising pawl 51a is engaged under the front lid 21a. .

At this point, the lid raising plate 49a is brought into contact with the rear surface of the force set 9 almost parallel to it. Thereafter, the lid raising plate 49a is rotated clockwise together with the force set 9 while maintaining its parallel state. However, holder 2
is successively rotated clockwise from the above state, and this moves to each position A4, A, A, shown in FIGS. 11D and 11E.
By being rotated to the forward movement position A6 shown in FIG. 11F, the force set 9 is also moved to the forward movement position A6 shown in FIGS.
It is rotated through the positions C4 and C5 shown in the figure to the force set installation completion position of position C6 shown in FIG. 11F.

Then, during this time, the guide pin 52c is inserted into the arcuate guide hole 53.
This guide pin 53 is pushed up along the arcuate surface of c.
c is each position C2, C3, C of this circular guide hole 53c
4, and is brought to its upper end position C5.

At this time, in connection with the movement of this guide pin 53c, both guide pins 52a, 52b also move into both guide holes 53a, 53b.
These two guide pins 52a, 52
b is also the position A2 of both guide holes 53a and 53b.
, a3, a4 and B2, b3, b4, and are brought to these upper end positions A5, b5. As a result, the lid raising plate 49a is moved upward relative to the force set 9 while maintaining the above-mentioned parallel state.

That is, the lid raising plate 49a is raised relative to the force set 9 while being rotated clockwise together with the force set 9. During the above period, the lid raising claw 51a is moved to the front lid 21a.
Since the front cover 21a is pushed up from below, the front cover 21a is automatically opened.

In other words, by pushing up the lid raising claw 51a, the front lid 21a is returned about the fulcrum pin 22a and rotated counterclockwise against the spring 23a as shown in FIG. 5, and is opened. According to the force setting mounting device described above, at the beginning of rotation of the holder 2 from the backward movement position to the forward movement position, the lid raising claw 5
1a quickly engages with the front cover 21a of the force set 9, and the front cover 21a can be opened quickly and reliably, which is very convenient.

With the above steps, a series of force set mounting operations are completed, and by mounting the force set 9, the tension detection pin 67, tape shifter 68, and pinch roller 69 in the backward movement position are moved to the notch 19b of the force set 9 as shown in FIG. , 19a, 18a
are inserted into the force set 9, and these are inserted inside the tape 14 (lower side in the figure). On the other hand tape 1
4 is inserted into the front side (lower side in the figure) of both heads 63, 64, tape guide 65, and capstan 66. In this tape deck, when the record button 3 or the playback button 5 is pressed to switch to the recording mode or the playback mode after the force setting is installed, the tension arm 72, shifter arm 74, and pinch roller arm 76 are activated, respectively, as shown in FIG. The tension detection pin 6 is rotated upward as shown by the chain line.
7. The tape shifter 68 and the pinch roller 69 are pulled out from the notches 19a, 19b, 18a of the force set 9 above the force set 9, and moved to the forward movement position indicated by the chain line in FIG.

As a result, the tape 14 is pulled out from the opening 17 of the force set 9 as shown by the chain line in FIG.
, 64, and is loaded onto the running path in a state where it is in contact with both tape guides 65 and 71, respectively. At the same time, the tape 14 is moved to the capstan 66 by the pinch roller 69.
is crimped. Therefore, the tape 14 is run in the drawn out state as described above, and recording or reproduction as known in the art is performed. Note that the tape 14 is fast-forwarded or rewinded while the tape 14 is being pulled back into the force set 9 as shown by the solid line in FIG. When ejecting the guide set 9, the eject button 8 is pressed, the lock pin 40 is removed from the locking pawl 37, and the holder 2 is unlocked.

As a result, the holder 2 is rotated from the forward movement position to the backward movement position by the return spring 36, and the force set 9 is rotated to the both reel shafts 57a.
, 57b and both loading pins 58a, 58b, both front lids 21a, 21b are returned to the springs 23a, 23 by the reverse operation of the force setting mounting operation described above.
It will be automatically closed by b. Then the 12th
The tape running drive mechanism and related mechanisms will be explained with reference to FIGS.

First, reel stands 80a and 80b are attached to the base sides of both reel shafts 57a and 57b, respectively, as is conventionally known. An FWD idler 81 is arranged on one side of the take-up reel stand 80a, and both reel stands 80a, 8
A REW idler 82 and an FF idler 83 are arranged vertically shifted from each other between 0b. Further, a drive motor 84 is attached to a predetermined position of the chassis 31. The FWD idler 81 is rotatably supported at one end of an idler lever 86 which is rotatably supported on the chassis 31 via a fulcrum pin 85. Also, the above RE
The W idler 82 is rotatably and swingably supported via a pendulum 90 at one end of an idler lever 89 which is rotatably supported on the chassis 31 via a fulcrum pin 88 . Furthermore, the FF idler 83 has a fulcrum pin 9.
It is rotatably supported on an idler lever 92 which is rotatably supported on the chassis 31 via 1. Pulleys 96 are fixed to the idler shaft 94 of the FWD idler 81 and the idler shaft 95 of the FF idler 83, respectively.
97 and one 99 of the two-stage pulleys 99 and 100 fixed to the motor shaft 98 of the motor 84 is a bell opening 0.
1 is wrapped around it. Further, a pulley 103 integrally formed with a flywheel 102 fixed to the capstan 66 and the other one of the two-stage pulleys 99 and 100
A belt 104 is wound around the belt 00. Therefore, the capstan 66 and both idlers 81 and 83 are always driven one rotation by the operation of the motor 84 via the belt and pulley group. On the other hand, the chassis 31 has five sliders 107, 1 for mode switching.
08, 109, 110, and 111 are vertically spaced apart from each other by a predetermined distance, and each is mounted horizontally.

Note that each of these sliders 107, 108, 109, 1
10 and 111 are respectively engaged with a pair of guide pins 112 installed in the chassis 31 through elongated holes 113, and are configured to be slidable in the left-right direction in FIG. 12, respectively.

And each of these levers 107, 108, 109, 11
0 and 111 are return springs 114 and 1 made of tension springs, respectively.
15, 116, 117, and 118, it is slidably biased toward the right side in FIG. In addition, the supply side reel stand 80
A ten-leg lever 120 is arranged on one side of b.
This ten-leg lever 120 is rotatably supported on the chassis 31 via a fulcrum pin 121.

A brake shoe 122 is fixed to one end of this ten-leg lever 120.
is configured such that it can be pressed onto and separated from the circumferential surface of the reel stand 80b. The other end of the tension lever 120 is connected to the other end of the tension arm 72 through a connection structure formed by a long hole 123 and a pin 124. The tension arm 120 is rotated clockwise in FIG. 12 by a tension spring 125, and the tension arm 72 is rotated counterclockwise in FIG. 12 in conjunction with this. ing. The tension arm 72 is always in contact with a cam piece 127 formed integrally with a part of the slider 107 by means of a pin 126 implanted in a part of the tension arm 72. Also, slider 1 above
A conversion lever 129 is disposed between the idler lever 86 and the idler lever 86, and the conversion lever 129 is rotatably supported on the chassis 31 via a fulcrum pin 130. The other end of the idler lever 86 and one end of the conversion lever 129 are coupled via a coupling structure formed by a pin 131 and a long hole 132. The idler lever 86 is rotated clockwise in FIG. 12 by a limiter spring 133 made of a tension spring, and in conjunction with this, the conversion lever 129 is rotated counterclockwise in FIG. There is. The other end of the conversion lever 129 is brought into contact with a pin 134 implanted in a part of the slider 107. Also, this pin 134 and the shifter arm 7
A shifter spring 136 made of a tension spring is tensioned between the pin 135 implanted at the other end of the pin 1.
35 is constantly pressed against the end surface 137 of the slider 107. Further, the idler lever 89 is biased to rotate clockwise in FIG. The other end of the lever 89 is the end surface 139 of the slider 111.
is in constant contact with the The position of the pendulum 90 is regulated by a guide hole 140 provided in the chassis 31. Further, a conversion lever 142 is disposed between the idler lever 92 and the slider 190, and the conversion lever 142 is rotatably supported on the chassis 31 via a fulcrum pin 143. Then, one end of the idler lever 92 and one end of this conversion lever 142 are connected to the pin 1.
44 and a long hole 145, which are connected to each other through a connecting structure. The idler lever 92 is rotated and biased in the clockwise direction in FIG. 12 by a limiter spring 146 consisting of a tension spring, and in conjunction with this, the conversion lever 142 is rotated and biased in the counterclockwise direction in FIG. There is. The other end of this conversion lever 142 is the end surface 1 of the slider 109.
47 at all times. Furthermore, the fulcrum pin J and V of the pinch roller arm 76 are connected to the capstan 66.
The pinch roller arm 76 is connected to the first pinch roller arm 76 by a limiter spring 150, which is a tension spring, stretched between the pinch roller arm 76 and the slider 108.
In Figure 2, it is rotated clockwise. Note that this pinch roller arm 76 is always in contact with an end surface 151 of the slider 108 by a pin 151 implanted at the other end. Further, a pair of left and right limiter brakes 155a, 155b are disposed above both reel stands 80a, 80b.

These limiter brakes 155a, 155b are composed of brake levers 157a, 157b to which brake shoes 156a, 156b are fixed, respectively, and brake levers 158a, 158b. Fulcrum pin 159a,
It is rotatably supported on the chassis 31 via 159b.

Both brake levers 158a and 158b have an inverted tenon T-shape, and one of the arm portions 16
Both brake levers 157a are attached to 0a and 160b.
, 157b are rotatably supported via fulcrum pins 162a, 162b, respectively. As clearly shown in FIG. 18B, the other arm portions 161a, 161b of both brake levers 158a, 158b are diagonally cut portions 163a,
163b, they face each other in the horizontal plane and overlap each other in their longitudinal direction.

Further, a limiter spring 164 made of a tension spring is stretched between both brake levers 157a, 157b, and between each brake lever 158a, 158b and each brake shutter lever 157a, 157b. A pair of limiter springs 167a made of tension springs are installed between the spring receivers 165a, 165b and 166a, 166b.
, 167b are stretched.

Between the limiter brakes 155a, 155b and the sliders 109, 110, a conversion lever 168 having a semi-inverted L shape is disposed. This conversion lever 168 is rotatably supported on the chassis 31 via a fulcrum pin 169, and has one horizontally extending end 168a.
extends above the overlapping portion of both arm portions 161a and 161b, and the other end 168b is suspended toward both sliders 109 and 111.

A notch 171 formed in the slider 109 includes a bent portion 170 physically formed in a part of this other end 168b.
A projecting piece 172 inserted into the slider 109 and integrally formed with the slider 109 is configured to be able to come into contact with the bent portion 170. Further, a projecting piece 173 integrally formed on the slider 111 is configured to be able to abut on a bent portion 174 integrally formed on the lowermost end of the other end 168b. A bent portion 175 formed integrally with a portion of the slider 107 is configured to be able to abut against a spring receiver 165a of a brake lever 158a of one of the limiter brakes 155a. In addition, a bent portion 180 integrally formed in a part of the slider 108 is connected to the other limiter brake 155.
The brake lever 157b is configured to be able to come into contact with the brake lever 157b. As clearly shown in FIG. 18A, a switch operating lever 176 is rotatably provided on the chassis 31 toward one end of the slider 110 via a fulcrum pin 177.

A limiter spring 178 consisting of a tension spring tensioned between one end 176a of the switch operating lever 176 and the slider 110 urges the switch operating lever 176 to rotate clockwise in FIG. 18A. It is in contact with the end surface 179. The other end 176b of this switch operating lever 176 is a recording/reproducing circuit changeover switch S1 composed of a slide switch.
is engaged with the slider 181 of.

Next, the state of tape running and driving by the tape running drive mechanism described above will be explained.

First, the five sliders 107, 108, 109, 1
10 and 111 have a bent portion 183 at the left end in FIG. 12, respectively.
, 184, 185, 186, and 187 are integrally molded, and these bent portions are connected to the three mode selection mechanisms described later.
The slider 107 is selectively driven by three mode selection levers 189, 190, 191.
, 108, 109, 110, and 111 are configured to be selectively driven.

However, in this case, as will be described later, only one mode selection lever 189
exclusively drives only one slider 107, but the other two mode selection levers 190 and 191 are configured to selectively drive each pair of sliders 108 and 109, 110 and 111. [Stop Mode] This stop mode is the state shown in FIG. 12, which is the state when the force set 9 described above is installed at a predetermined position.

At this time, the tension detection pin 67 and tape shifter 6
8. The pinch roller 69 is inserted inside the tape 14,
And it is in the state of being moved backward to the backward movement position. Further, at this time, the FWD idler 81 is separated from the take-up side reel stand 80a. Furthermore, at this time both limiter brakes 155
The re-brake shoes 156a, 156a of a, 155b are crimped to both reel stands 80a, 80b, and the rotation of both reel stands 80a, 80b is stopped. Further, at this time, the brake shoe 122 of the ten leg lever 120 is separated from the supply side reel stand 80b. Note that if the power switch is already turned on in this stop mode, the motor 84 is operating, and the capstan 6 is powered by the motor 84.
6. The FWD idler 81 and the FF idler 83 are each rotated in the direction of the arrow. [Reproduction Mode] This reproduction mode is the state shown in FIG. 13, and is carried out, for example, by pressing the reproduction button 5 in the above-mentioned stop mode and turning on the reproduction switch described later.

When the playback switch is turned on now, the mode selection lever 189 first contacts the bent portion 183 of the slider 107 and slides the slider 107 to the left in FIG. 13 against the return spring 114.

Then, a little later, the mode selection lever 190 comes into contact with the bent portion 184 of the slider 108 and slides the slider 108 to the left in FIG. 13 against the return spring 115. First, when the slider 107 is slid to the left in FIG.
2 is rotated counterclockwise.

As a result, the tension detection pin 67 moves to the upper side of the force set 9 and reaches the forward movement position.
2 is lightly pressed onto the supply side reel stand 80b. At the same time, the shifter arm 74 is rotated clockwise via the limiter spring 136, and the tape shifter 68 moves above the force set 9 to reach the forward movement position. At this time, the tape shifter 68 enters a notch 193 formed in a part of the head substrate 70 and its position is regulated. With the above operation, the tape 14 is pulled out above the cassette 9 by the tension detection pin 67 and the tape shifter 68, and the tape 14 is pulled out above the cassette 9, and both heads 63, 64 and both tape guides 6 are pulled out.
5 and 71, respectively. Simultaneously with the tape drawing operation, the idler lever 86 and the conversion lever 129 are rotated clockwise and counterclockwise by the action of the limiter spring 133, and the FWD idler 81 is pressed against the take-up reel stand 80a.

At the same time, the bent portion 175 comes into contact with the spring receiver 165a of one brake lever 158a and presses it, so that this brake lever 158a
The brake shoe 156 is rotated counterclockwise against the
a is separated from the take-up side reel stand 80a. At this time, the limiter spring 164 is a pair of limiter springs 1.
The other brake lever 158b is held in the above-described stop mode because it has a weaker spring than the brake levers 67a and 167b. That is, the brake shoe 156b
is crimped onto the supply side reel stand 80b, and this reel stand 8
The rotation of 0b is stopped. Next, a little later than the slider 107, the slider 108 is slid to the left in FIG. , and press the tape 14 onto the capstan 66.

At the same time, the bent portion 180 contacts and pushes the brake lever 157b, so the brake lever 157b is rotated clockwise against the limiter spring 164, and the brake lever 156b is moved to the supply side. It is separated from the reel stand 80b. Therefore, in this playback mode,
With the tape 14 pulled out above the force set 9 and loaded onto a predetermined running path, it is pressed against the capstan 66 by the pinch roller 69, and the brakes of both reel stands 80a and 80b are released. and FWD
The take-up reel stand 80a is driven to rotate in the direction of the arrow (tape winding direction) by the idler 81, so that the tape 14 runs rightward in FIG. The desired regeneration is achieved by the following.

During this playback mode, the tension detection pin 67 constantly detects the tension of the tape 14, and in conjunction with the action of the limiter spring 125, the tension arm 72 is swung clockwise and counterclockwise in response to changes in tape tension. As a result, the ten-leg lever 120 is swung counterclockwise and clockwise. As a result, the brake system 122 repeatedly presses and separates from the supply reel stand 80b, the back tension of the tape 14 is automatically adjusted, and the tape 14 runs stably at a constant tension. [Recording Mode] This recording mode is the state shown in FIG.
is pressed at the same time, and a playback switch and a recording switch, which will be described later, are turned on at the same time.

When the playback switch and the record switch are turned on at the same time, the slider 107 is first slid to the left in FIG. 1st
Figure 4: Slides to the left.

Note that the slider 110 is reset by the return spring 1 when the mode selection lever 191 comes into contact with the bent portion 186 of the slider 110 and presses it.
It is slid against 17. And this slider 1
The switch operating lever 176 is rotated clockwise in FIG. 18A by the slide of 10 via the limiter spring 178, and the other end 176b slides the slider 181 of the changeover switch S1 to switch the switch S1 from the play mode to the record mode. . The other operations are exactly the same as those in the playback mode described above, and the tape 14 is
4, it is run at a predetermined speed in the right direction in FIG. 4, and desired recording is performed by the recording/reproducing head 64. [
Pause mode] The pause mode for temporarily stopping the running of the tape 14 during the recording or playback mode described above is activated when the pause button 10 is pressed during the recording or playback mode and a pause switch, which will be described later, is turned on. It is done by twisting.

FIG. 15 shows this pause mode. For example, when the pause switch is turned on during playback mode, the slider 108 is released from sliding by the mode selection lever 190, and the slider 108 is moved by the return spring 115. It is moved back to the right in Fig. 13.

Then, the pinch roller arm 76 is moved back and the pinch roller 69 is separated from the capstan 66, and at the same time,
Since the bent portion 180 of the slider 108 separates from the brake lever 157b, this brake lever 1
57b is moved back clockwise in FIG. 13 by the limiter spring 164, and the brake shoe 156b is pressed against the supply side reel stand 80b.

Therefore, in this pause mode, the drive of the tape 14 by the capstan 66 is cut off, and at the same time, the supply side reel stand 8
A brake is applied to 0b, and the running of the tape 14 is temporarily stopped. However, in this pose mode, FWD
Since the idler 81 is still press-fitted to the take-up reel stand 80a, this reel stand 80a is still rotationally driven. However, as is conventionally known, the H-mount idler 81 frictionally drives the reel stand 80a via a torque limiter mechanism, while the supply reel stand 80b is braked.
is tensioned, and the rotation of the reel stand 80a on the winding side and the reel shaft 57a is stopped by the tape 14. Note that when the pause switch is turned on during recording mode, the slider 110 is moved by the mode selection lever 191.
The slider 110 is also released, and the slider 110 is moved back to the right in FIG. 14 by the return spring 117, and the other operations are exactly the same as the pause in the playback mode.

In addition, this tape deck allows switching from the stop mode to the above-mentioned pause mode, and in this case, only one slider 107 is slid to the left by the mode selection lever 189 as shown in FIG. state.

At this time, the tape 14 is pulled out from inside the force set 9, loaded onto a predetermined running path, and then tensioned.
And the running is temporarily stopped. [Fast-forward mode] 7. This fast-forward mode is in the state shown in Figure 16, which is achieved by pressing the fast-forward button 4 in the stop mode described above and turning on the fast-forward switch described later. It will be done.

If the fast forward switch is turned on now, mode selection lever 1
90 comes into contact with the bent portion 185 of the slider 109, causing the slider 109 to slide to the left in FIG. 16 against the return spring 116.

As a result, the idler lever 92 is rotated clockwise by the limiter spring 146, and the FF idler 83 is pressed onto the take-up reel stand 80a. At the same time, the protruding piece 172 of the slider 109 comes into contact with the bending part 170 of the conversion lever 168 and pushes it, so this conversion lever 16
8 is rotated clockwise, and its one end 168a is connected to both arm portions 161a, 1 of both brake levers 158a, 158b.
61b Pressed by soil. As a result, these brake levers 158a and 158b are rotated counterclockwise and clockwise, respectively, against the limiter spring 164, and these brake shoes 15qa and 156b are rotated against both reel stands 80.
a and 80b at the same time. Therefore, in this fast-forward mode, the brakes of both reel stands 80a and 80b are released, and at the same time, the winding side reel stand 80a is rotated and driven at high speed in the direction of the arrow (tape winding direction) by the FF idler 83. , the tape 14 is run rightward in FIG. 16 at high speed.

At this time, since the tension detection pin 67 and tape shifter 68 are in the backward movement position, the tape 14 is run within the force set 9. [Rewind mode] This rewind mode is the state shown in FIG. 17, and is activated by pressing the rewind button 7 in the stop mode described above and turning on the rewind switch described later. It is done.

If the rewind switch is turned on now, mode selection lever 1
91 comes into contact with the bent portion 187 of the slider 111, and the slider 111 is slid to the left in FIG. 17 against the return spring 118.

As a result, the idler lever 89 is rotated clockwise via the limiter spring 138, and the RE
The W idler 82 is pulled diagonally to the lower left side in Figure 17,
This REW idler 82 connects the supply side reel stand 80b and the FF
It is crimped between the idler 83 and the idler 83. At the same time, the protruding piece 173 of the slider 111 comes into contact with the bending part 174 of the conversion lever 168 and pushes it, so this conversion lever 16
8 is rotated clockwise, and its one end 168a is connected to both arm portions 161a, 1 of both brake levers 158a, 158b.
61b. As a result, both brake shoes 156a, 156b are simultaneously separated from both reel stands 80a, 80b, similar to the above-described fast-forward remote operation. Therefore, in this rewind mode, the brakes of both reel stands 80a and 80b are both released, and at the same time, the supply side reel stand 80b is moved in the direction of the arrow (tape winding direction) by the REW idler 82 driven via the FF idler 83. direction) at high speed, and the tape 14 is run at high speed in the left direction in FIG.

At this time, as well as in the fast forward mode described above, tape 1
4 will be run within force set 9. Note that switching from each of the above-mentioned modes to the stop mode is performed by pressing the stop button 6 and turning on a stop switch, which will be described later. When the stop switch is turned on, the sliders 107, 108, 109, 110, and 111 are all released by the mode selection levers 189, 190, 191, so these sliders that had been slid to the left as described above are released. sliders 107, 108, 109
, 110, and 111 are respectively moved back to the right as shown in FIG. 12, and all the mechanisms are returned to the state shown in FIG. For example, when switching from playback mode to stop mode, the following operations are performed.

When the stop switch is turned on during the playback mode, first the slider 108 is released from sliding by the mode selection lever 190 and the slider 108 is moved back, and a little later the mode selection lever 189 is released and the slider 108 is moved back. 107 is returned. and slider 108
When the retractor is moved backward, the pinch roller 69 is separated from the capstan 66 as in the above-described pause mode, and at the same time, the brake shoe 156b is pressed against the supply side reel stand 80b.

At this time, due to the conventionally known function of the limiter brake 155b, the brake shoe 156b is connected to the supply side reel stand 8.
Since it is strongly pressed against the reel 0b by the biting action, a strong brake is applied to the reel stand 80b and its rotation is stopped instantly.

Then, when the slider 108 is moved back, the cam piece 127 (and thus the pin 126) is pushed, the tension arm 72 is rotated clockwise against the tension spring 125, and the tension detection pin 67 is set to the force setting position. It is moved back to the return position within 9.

At the same time, the pin 135 is pushed by the end surface 137 of the slider 107, so the shifter arm 74 is rotated counterclockwise, and the tape shifter 68 is moved to the force setting 9.
It is moved back to the return position within. And after this slider 1
When the bent portion 175 of the brake lever 158a separates from the spring receiver 165a of the brake lever 158a, the brake lever 158
a is rotated clockwise by the limiter spring 164, and the brake shoe 156a is rotated to the take-up side reel stand 80a.
is crimped. At this time, the limiter brake 155a
By the conventionally known function, the brake shoe 156a is lightly pressed against the take-up reel stand 80a with a relief action, and a weak brake is applied to this reel stand 80a. and immediately after this slider 107
Since the pin 134 pushes the conversion lever 129 and rotates it clockwise, the idler lever 86 is rotated counterclockwise against the limiter spring 133, and the FWD idler 81 is separated from the take-up reel stand 80a. It turns out. That is, as shown in FIG. 19, first, the pinch roller 69 is separated from the capstan 66, and at the same time,
A brake is applied to the supply side reel stand 80b, and the supply of the tape 14 is stopped.

Subsequently, the tension detection pin 67 and the tape shifter 68 are moved back, so that the tape 14 can be pulled back into the force set 9.

At this moment, the tape 14 becomes slack.

However, during this time, the FWD idler 81 is still crimped to the take-up reel stand 80a, and the reel stand 80a continues to rotate in the tape winding direction, so the moment the tape 14 becomes slack, , the slack of the tape 14 is taken up on the take-up reel 13. The tape 14 is therefore pulled back into the force set 9 by the winding and is also tensioned within the force set 9.

Finally, the brake is applied to the take-up reel stand 80a, and the drive of the reel stand 80a is cut off, so that the tensioned state of the tape 14 is maintained.

Note that when the recording mode is switched to the stop mode, the tape 14 is pulled back into the force set 9 and tensioned by the same operation as described above.

If the tension is maintained within the tape 14 as described above,
When the force set 9 is once ejected and then reinstalled, since there is no slack in the tape 14, the tape 14 can be reliably and smoothly inserted into a relatively narrow gap such as between the capstan 66 and the pinch roller 69. It can be inserted.
In this tape deck, it is possible to switch from the stop mode to the pause mode, and if this operation is repeated, the tape 14 may become slack.

That is, as mentioned above, in the pause mode, the supply side reel stand 8
Since the brake is applied on the 0a side and the brake on the take-up reel stand 80a side is released, the tape 14
is pulled out from the take-up reel 13 side and loosens, causing the tape 14
A positional shift occurs, which causes inconvenience during the next reproduction or recording.

However, in this tape deck, as mentioned above, during the pause mode, the FWD idler 81 frictionally drives the take-up reel table 80a, keeping the tape 14 under constant tension, so it is difficult to switch between the stop mode and the pause mode. Even if this is repeated, the tape 14 will not become loose or misaligned.

Next, the mode selection mechanism and related mechanisms will be explained with reference to FIGS. 20 to 27.

First, a sub-chassis 196 is fixed to the rear side of the chassis 31 at a position offset to the left in FIG.

Three plunger solenoids (hereinafter simply referred to as plungers) 197, 198, and 199 for mode selection are mounted on the subchassis 196 at a predetermined distance vertically and in a substantially horizontal state. Note that due to the drawings, the plungers 197, 198, and 199 are arranged horizontally in FIGS. 20 to 22 and 25, but the plunger 197 on the right side in these drawings is located at the top, and the plunger 197 on the left side is located at the top. The plunger 199 is located at the bottom. Each of the above plungers 197, 198, 1
99 plunger pins 200, 201, 202, connecting plates 205, 206, 207 are connected to pin 2, respectively.
08,209,210.

Note that the tip of each of these connecting plates 206, 207, 208 is a vertical plate part 1 integrally formed on the sub chassis 196.
They are inserted through slits 211, 212, and 213 formed in 96a, respectively. In addition, each of these connecting plates 205, 2
Spring receivers 205a, 2 integrally molded on 06, 207
Return springs 214, 215, 216 made of tension springs are stretched between the vertical plate portions 196a and 06a, 207a, respectively, and these connecting plates 205, 206, 20
7 and each plunger pin 200, 201, 202 are biased to slide in the left direction in FIGS. 23, 24, and 26 (also the left direction in FIG. 12). Note that these connecting plates 205, 206, 207 are brought into contact with the vertical plate part 196a and their backward movement position is regulated by a stopper 217, such as a dowel, which is stamped on the negative part of these parts.
On the other hand, a guide shaft 218 which also serves as a fulcrum shaft is disposed between a pair of upper and lower horizontal plate portions 196b integrally formed on the sub-chassis 196.
is installed vertically.

The mode selection lever 1 is attached to the guide shaft 218 of the lever.
89, 190, and 191 are engaged, respectively.

Note that each of these mode selection levers 189, 190, and 191 has a U-shaped portion 219 integrally molded at one end thereof, and a shaft insertion boss portion 220 integrally molded at the middle portion thereof. There are two mode selection levers 190 and 191.
A stopper portion 221 is integrally molded in a portion of the and. One mode selection lever 189 is inserted into the guide shaft 218 by the boss portion 220 and is configured to be rotatable around the guide shaft 218, and the remaining two mode selection levers 190, 191 are configured to be rotatable around the guide shaft 218. The guide shaft 218 is inserted through these boss portions 220 so that the guide shaft 218 is slidable vertically along the guide shaft 218 and rotatable about the guide shaft 218. . However, mode selection lever 1 located at the top of these three mode selection levers
The tip 189a of 89 is the bent portion 1 of the slider 107.
83.

In addition, the tips 190a and 191a of the two mode selection levers 190 and 191 located at the middle and bottom portions can be moved up and down along the guide shaft 218, so that the tips 190a and 191a of the two mode selection levers 190 and 191 located at the middle and bottom portions are connected to each pair of sliders 108 by changing their positions up and down along the guide shaft 218. 109 and 11
Bent parts 184 and 185 and 186 and 18 between 0 and 111
7. Note that each of the mode selection levers 189, 190, 191 has a U-shaped portion 219 that connects each of the connection plates 205, 206,
207, and each of these U-shaped parts 2
19, the connecting plates 205, 206, 207 are connected to each other through pins 222, 223, 224 slidably inserted thereinto.

In addition, each mode selection lever 189, 190, 191 is connected to this and three spring receivers 225 provided on the sub chassis 196.
, 226, 227 are rotated in the counterclockwise direction as shown in FIGS. . Further, a slider 23 is provided inside the vertical plate portion 196a.
2 are arranged vertically. The slider 232 has its upper and lower ends 232a and 232b inserted into a long hole 233 formed in the vertical plate part 196a and an insertion hole 234 formed in the lower horizontal plate part 196b, and is guided by these in the vertical direction. It is configured to be slidable. The slider 232 is urged to slide downward by a return spring 236, which is a tension spring, stretched between a spring receiver 235 integrally formed in a part of the slider 235 and the lower horizontal plate 196b. ing. Furthermore, grooves 237, 238, and 239 are formed at three locations under the soil of this slider 232, respectively. Between the upper end 232a of this slider 232 and the mode selection lever 189 is a conversion lever 24 having a YL shape.
1 is placed. This conversion lever 241 is rotatably supported on the sub-chassis 196 via a fulcrum pin 242, and one end 241a thereof is attached to the mode selection lever 18.
9, and the other end 2
41b is engaged in the groove 237 at the top of the slider 232. In addition, the remaining two mode selection levers 19
0 and 191 are partially engaged in the other two grooves 238 and 239 of the slider 232, respectively.
Furthermore, the three mode selection levers 189, 190,
3 molded into the sub chassis 196 so that 191 can be inserted through it.
Among the three insertion holes 244, 245, and 246, 244 is configured to have a small width, but the remaining two holes 245 and 246 are configured to have a large width ( A stopper piece 247 corresponding to each stopper part 221 of both the mode selection levers 190 and 191 is provided on one side of the insertion holes 245 and 246 and at the center position in the vertical direction. It is integrally molded. Next, the mode selection situation by the mode selection mechanism described above will be explained.

In this mode selection mechanism, the on/off operation of the three plungers 197, 198, 199, which is a small number, causes the five sliders 107, 108, which are a large number, to be turned on and off.
109, 110, 111 are selectively slid and driven,
This is used to switch between the aforementioned modes.

[When equivalent to stop mode]

At this time, all the planshas 197, 198, 199
is in the off state.

Then, as shown in FIG. 20, the slider 232
6, both groove portions 238
, 239, both mode selection levers 190, 191 are hooked, and these levers 190, 191 are connected to the guide shaft 2.
18 (position offset to the left in FIGS. 22 and 25). In this state, each tip 1 of the mode selection levers 190, 191 is
90a, 191a are two mode selection levers 109, 1
11, respectively. [
At the time of switching the playback mode] At this time, first, current is supplied to the plunger 197 and the plunger 197 is turned on, and a little later, current is supplied to the plunger 198 and the plunger 197 is turned on.

First, when the plunger 197 is turned on, the plunger pin 200 pushes the connecting plate 20 as shown in FIG.
5 is pulled to the right against the return spring 214, and the mode selection lever 189 is rotated clockwise against the return spring 228.

As a result, the bent portion 183 of the slider 107 is pushed by the tip 189a of the mode selection lever 189, and the slider 107 is slid to the left in FIG. 12 as described above. At the same time, one end 241a of the conversion lever 241 is pushed by the boss portion 243 of the mode selection lever 189, so that the conversion lever 241 is rotated clockwise as shown in FIG. Then, the other end 24 of the conversion lever 241
1b, the slider 232 releases the return spring 23 as shown in FIG.
6 and is pulled upward. As a result, both mode selection levers 190 and 191 are hooked by both grooves 238 and 239 of this slider 232, and both of these levers 1
90 and 191 are reciprocated along the guide shaft 218 to a raised position (a position shifted to the right in FIGS. 22 and 25). As a result, both mode selection levers 190,1
The tips 190a and 190b of the mode selection levers 91 are switched to be engaged with the bent portions 184 and 186 of the two mode selection levers 108 and 110, respectively. However, when the plunger 198 is turned on a little later than the above operation, the connecting plate 206 is pulled to the right by the plunger 201 against the return spring 215, as shown in FIG. 24, and the mode selection lever is 190 is rotated clockwise against return spring 229.

As a result, the bent portion 184 of the slider 108 is pushed by the tip 190a of the mode selection lever 190, and the slider 108 is slid to the left in FIG. 12 as described above. [When switching the recording mode] At this time, as in the case of switching the playback mode, current is first supplied to the plunger 197 and this plunger 197 is turned on, after which the remaining two plungers 198 and 199 are supplied with current after a short delay. Electric current is supplied to these two plungers 198, 199.
are turned on at the same time.

At this time, since the plunger 199 is in the on state, the plunger pin 202 causes the connecting plate 2 to
07 is pulled to the right in FIG. 26 against the return spring 216, the mode selection lever 191 is rotated clockwise in FIG.
87 is pressed, and this slider 111 is slid to the left in FIG. 12 as described above.

Note that the other operations are exactly the same as those at the time of switching the reproduction mode described above. [When switching the pause mode] To switch the pause mode to temporarily stop the running of the tape 14 during the recording or playback mode, keep only the plunger 197 in the on state while the playback or record mode is switched as described above. , other planshas 198, 199
These plungers 198,
199 to the off state.

Note that when the plungers 198 and 199 are turned off, the mode selection levers 190 and 191 and the connecting plate 206 are turned off.
, 207 etc. are return springs 229, 230 and 215, 21
Slider 1 is to be moved back respectively by 6.
08 and 110 are moved back to the right in FIG. 12 as described above.

Further, when switching from the stop mode to the pause mode, only one plunger 197 is turned on, and the related operations at this time are exactly the same as those when switching the reproduction mode described above.

[When switching to fast forward mode]

At this time, the plunger 197 remains off and only the plunger 198 turns on.

At this time, since the mode selection lever 190 is in the lowered position (the position shifted to the left in FIGS. 22 and 25), the plunger 198 is turned off and on, and the mode selection lever 190 is moved to the lower position by the above-described operation. When rotated clockwise in FIG. 24, the slider 10 is rotated at its tip 190a.
9 is pushed, and this slider 109 is slid to the left in FIG. 12 as described above.

[When switching the rewind mode] At this time, the plunger 197 remains off, and only the plunger 199 turns on, similar to when switching the fast forward mode.

At this time, as in the case of fast forward remote switching, the mode selection lever 191 is still in the lowered position (position shifted to the left in Figs. 22 and 25), so the plunger 199 is in the on state. When the mode selection lever 191 is rotated clockwise in FIG. 26 by the above-described operation,
The bent portion 187 of the slider 111 is pushed by the tip 191a, and the slider 111 is moved to the twelfth position as described above.
The image is slid to the left.

Note that in the mode selection mechanism as described above, each pair of sliders 108 and 109 and 110 and 111 is selectively slid by changing the vertical position of both mode selection levers 190 and 191. , 191 must be accurately moved to either the upper or lower position.

On the other hand, these mode selection levers 190, 191
If the position of the plungers 198, 199 becomes erroneous for some reason and it unexpectedly stops at an intermediate position between the upper and lower sides (the position indicated by the dashed line in Fig. 25),
Even if the mode selection levers 190 and 191 are turned on,
However, it becomes difficult to slide the sliders 108, 109, 110, and 111 correctly. For example, if none of the sliders are slid, or if each pair of sliders 108 and 10
9, 110, and 111 may similarly slide, causing malfunctions. Therefore, in this tape deck, if the above-mentioned positional deviation occurs in both mode selection levers 190, 191, the operation of both mode selection levers 190, 191 is stopped even if both plungers 198, 199 are in the ON state. This is to prevent the occurrence of malfunctions as described above.

That is, when both plungers 198, 199 are turned on with the mode selection levers 190, 191 displaced as shown by the dashed line in FIG.
As clearly shown in Figure 6, these two mode selection levers 19
0,191 stopper part 221 is a stopper piece 247
The levers 190 and 191 are prevented from rotating.

Next, the ejection prevention mechanism will be explained with reference to FIGS. 28 to 31.

First, the lower end 38b of the lock lever 38 has a bent portion 25.
0 is integrally molded, and is engaged with the notch 45 of the ejector lever 44 by this bent portion 250.

Further, a projecting piece 251 is integrally formed on the lower end 38b, and this projecting piece 251 forms the bent portion 4 of the support plate 32a.
28, the rotation of this lock lever 38 in the clockwise direction in FIG. 28 is restricted. Further, the eject lever 44 is inserted into a pair of guide grooves 253, 254 formed in the bent portion 42 and the lever support portion 47, and is configured to be slidable in the longitudinal direction, which is the front-rear direction.

A pair of stopper pieces 255 and 256 are integrally formed on the ejector lever 44 at its longitudinally intermediate portion and rear end portion. Further, a slider 258 for preventing ejection is arranged vertically on the lateral outer side of the support plate 32a, and is installed between horizontal plate parts 47a and 47b formed in pairs above and below the lever support part 47. .

Note that this slider 258 is attached to both horizontal plate portions 47a, 4.
It is inserted into a pair of guide grooves 259 and 260 formed in 7b and is configured to be slidable in the vertical direction. The slider 258 is slid upward by a return spring 262, which is a tension spring, stretched between a spring receiver 261 integrally formed in a part of the slider 258 and the upper horizontal plate portion 47a. Forced. Note that a projecting piece 263 is integrally molded on the lower end of this slider 258, and this projecting piece 26
3 comes into contact with the lower horizontal plate portion 47b, thereby restricting sliding toward the Hijikata side. Further, a notch 264 is formed in the slider 258 at a position opposite to the stopper piece 255 of the ejector lever 44. On the other hand, a conversion lever 266 is disposed between the upper end 258a of the slider 258 and the brake lever 158a of the limiter brake 155a on the take-up reel stand 80a side.

This conversion lever 266 is rotatably supported on the chassis 31 via a fulcrum pin 267, and both ends 266a
, 266b are in contact with the arm portion 160a of the brake lever 158a and the upper end 258a of the slider 258. Next, the ejection prevention situation by the ejection prevention mechanism described above will be explained.

This ejection prevention mechanism is intended to prevent ejection of the force set 9 in all modes other than the aforementioned stop mode.

That is, when the force set 9 is installed as described above,
The holder 2 is locked by the lock pin 40 being locked with the locking pawl 37 of the holder 2.

On the other hand, when ejecting, the second
9 Press the eject button 8 as shown in Figure 9, and press the eject button 4.
4 slides to the rear. Then, the bent portion 250 of the lock lever 38 is pushed by the notch 45, the lock lever 38 is rotated counterclockwise against the return spring 43, and the lock pin 40 is removed from the locking hole 37. Holder 2 is unlocked. As a result, the holder 2 is rotated from the forward position to the backward position by the return spring 36, and the cassette 9 is ejected as described above. However, if this cassette eject operation is unexpectedly performed in a mode other than the stop mode, that is, in the play mode, record mode, pause mode, fast forward mode, rewind mode, etc., the tape 14, tape running, and drive system etc. can be damaged in an instant, and such scandals must be avoided at all costs.

By the way, in all modes other than the stop mode, the brake on the take-up reel stand 80a is released as described above, and the brake lever 158a is rotated counterclockwise as shown by the chain line in FIG.

As a result, the arm portion 16 of the brake lever 158a
0a pushes up one pin 268, the conversion lever 266 is rotated clockwise as shown by the chain line in FIG. 30, and the other pin 269 pushes up the upper end 258a of the slider 258
is pressed, and the slider 258 is held in a lowered position against the return spring 262 as shown by the chain line in FIG. However, due to the lowering of the slider 258, the notch 264 is opened to the stopper piece 255 of the ejector lever 144.
The front surface 258b of the upper side of the notch 264 of this slider 258 is biased downwardly, and the stopper piece 255
It is in a lowered state at the rear of the car. Therefore, even if you try to press the eject button 8 in this state, the stopper piece 25
5 collides with the upper side front surface 258b, and the ejector lever 44 cannot be slid rearward, making it impossible to eject the force set 9 described above.

Therefore, in this tape deck, the force set 9 is prevented from ejecting in all modes other than the stop mode (play mode, record mode, pause mode, fast forward mode, rewind mode, etc.). Note that the other stopper piece 256 comes into contact with the back surface 258c of the slider 258, thereby preventing the ejector lever 44 from coming off to the front side. Next, a device for attaching the front cover 27 of the holder 2 will be explained with reference to FIGS. 32 to 39.

FIGS. 32 to 34 show the front lid 27, in which a transparent plate 273 such as a glass plate is fixed to the inside of a horizontally long rectangular lid frame 272. Also, the lid frame 272
A pair of left and right side plates 274a, 274b are integrally formed on the back side of both left and right end portions 272a, 272b.
On the back side of both left and right ends 272a and 272b of the lid frame 272, an inverted L-shaped locking claw 27 is located at a position that is biased upward.
5a and 275b are integrally molded. Further, a pair of left and right guide grooves 296a, 296b whose lower ends are open are formed at the inner lower end positions of the side plates 274a, 274b. Furthermore, a pair of recessed left and right locking portions 277a and 277b are formed. Note that the bottom surfaces of both guide grooves 276a and 276b are tapered surfaces 278a.
, 278b. On the other hand, as shown in FIG. 35, the pair of left and right side plates 28a, 2
A pair of left and right bent portions 282a and 282b, which are bent inward from the front side of 8b, are integrally formed.

A pair of left and right insertion guides 283a, 283b of the front lid 27 made of synthetic resin moldings are fixed to the back sides of both bent portions 282a, 282b. Further, a pair of left and right locking claws 284a, 284b are integrally formed on both left and right sides of the lower end sides of these insertion guides 283a, 283b. Note that both of these locking claws 284a, 284
b is given elasticity in the left and right direction using these root portions 285a, 285b as fulcrums, and both of these locking claws 284a, 284b are attached to the side plates 28a, 28b and the bent portion 2.
It is inserted through a pair of left and right notches 286a, 286b formed at the bent corners with 82a, 282b, and protrudes to both left and right sides. Furthermore, locking pieces 287a and 287b are integrally formed at the upper ends of both bent portions 282a and 282b. Furthermore, recesses 288a and 288b for insertion of the locking claws 275a and 275b of the front lid 27 are formed on the front sides of the insertion guides 283a and 283b.

Furthermore, inside the position slightly biased downward from both the locking pieces 287a, 287b, there are the insertion guides 283a,
A pair of left and right semicircular portions 289a and 289b are integrally molded on 283b. Note that the double force setting presser spring 46 is actually fixed to the back surface of the double insertion guides 283a and 283b. However, the front cover 27 is as shown in Fig. 36~
It is detachably attached to the holder 2 as shown in FIG. 38.

That is, the back side of the front lid 27 is inserted into both insertion guides 283a and 283b.
This front lid 2 is in close contact with the front surface of the
7 to the lower side along the front surfaces of both insertion guides 283a and 283b.

As a result, both locking pieces 2 are inserted into both locking claws 275a and 275b.
At the same time when 87a and 287b are inserted relatively, both locking claws 284a and 284b are inserted into both guide grooves 276a and 276.
inserted into b. At this time, both locking claws 284a, 28
4b is the tapered surface 27 of both guide grooves 276a, 276b.
8a, 278b, the locking pieces 287a, 287b are inserted while being slightly burned inward as shown by the chain lines in FIG. At the moment when the front cover 27 comes into contact with the upper end and its position is restricted with respect to the holder 2, the two locking claws 284a, 284b expand outward due to their elasticity, and the two locking portions 277a, 277b engaged within.

The front lid 27 is fixed to the holder 2 through the above steps. When removing the front cover 27 from the holder 2, by pulling up the front cover 27 a little forcefully in the opposite direction to the above-mentioned operation, the locking claws 275a and 275b will come off from the locking portions 277a and 277b. This front cover 27 can be easily removed diagonally upward. As described above, in this tape deck, the front cover 27 of the holder 2 can be removed very easily. When the front cover 27 is removed, the holder 2 is connected to the force set receiver 29 and the left and right side plates 28a, 28b.
There is only an upwardly open U-shaped frame formed by the above, and a large space is formed in the center.As a result, the force set mounting part can be viewed from the opening 17 of the cabinet 1 through this space with great ease. It becomes possible to enter
For example, cleaning of the heads 63, 64 and the capstan 66, as well as repair and inspection of the cassette mounting section, etc., can be carried out extremely easily.

Next, the erroneous erasure prevention z detection mechanism will be explained with reference to FIGS. 12 and 40.

On the front side of the chassis 31, at the lower right end in FIG.
93 is placed.

This detection lever 293 is rotatably supported via a fulcrum pin 294. This detection lever 293 has a detection arm part 295 for detecting either one of the accidental erasure prevention pieces 30a and 30b of the force set 9 described above, and a switch actuation arm part 296 that are integrally molded vertically. has been done. And the tip 295 of the detection arm part 295
a is extended to the lower position of the mounting space of the force set 9 by the holder 2 described above, and is also connected to the switch operating arm 296.
The tip 296a extends upward. The detection lever 293 is also provided on the chassis 31. ′
A return spring 298, which is a tension spring, is stretched between the spring support 297 and the return spring 298, which is biased to rotate clockwise in FIG. The detection lever 293 is prevented from rotating in the clockwise direction by a stopper 299 provided on the chassis 31. On the other hand, the switch operating arm 296
An erroneous erasure prevention detection switch S2 consisting of a micro switch is attached to the front surface of the chassis 31 at an upper position. The tip 296a of the arm portion 296 is configured to press the detection switch S2 actuator 301. Note that the switch pressing surface 303 of the tip 296a of the arm portion 296 is connected to the fulcrum pin 294.
It is formed into an arcuate surface centered at , and has a predetermined length TlO in the direction of the arc.

However, the front end of this switch pressing surface 303 is a tapered surface 30.
Connected to 4. and the actuator 30
The tip 301a of the switch pressing surface 303 protrudes inward from the arcuate trajectory T, , of the switch pressing surface 303. According to the erroneous erasure prevention mechanism as described above, before the force set is installed, the detection lever 293 is moved back as shown by the solid line in FIG. 40, and at this time the detection switch S is in the OFF state.

When the force set 9 is installed in a predetermined position by the holder 2 as described above, the detection lever 2 is opened as shown in FIG.
The tip 295a of the detection arm 295 of 93 is connected to one of the accidental erasure prevention pieces of the force set 9, for example, the end surface 30a' of 30a.
This detection lever 293 is pushed by the return spring 29
8, it is rotated counterclockwise as shown by the chain line.

At this time, the tip 301a of the actuator 301 is guided by the tapered surface 304 of the switch operating arm section 296 and is pushed up relatively onto the switch pressing surface 303, so that the actuator 303 moves with the stroke Sl as shown by the chain line.
When pressed for O minutes, the detection switch S2 is turned on. As described above, the detection operation of the erroneous erasure prevention piece 30a is performed, and the above-mentioned recording becomes possible when the detection switch S2 is turned on.

On the other hand, when the tape 14 in the force set 9 must not be erased by mistake, the erase prevention piece 30a is pushed into the force set 9, and when the force set 9 configured in this way is installed, The erasure prevention piece 30a is the detection lever 29
Do not touch 3. Therefore, at this time, even if the force set 9 is attached, the detection lever 293 does not operate at all, and the detection switch S2 remains in the OFF state, so that the above-mentioned recording cannot be performed. Since the switch pressing surface 303 of the detection lever 293 is formed into a circular arc surface centered on the fulcrum pin 294 and has a predetermined length TlO in the direction of the arc, the accidental erasure prevention piece 30
Even if the detection lever 293 deviates slightly in the front-rear direction relative to the position indicated by the chain line in FIG. 40 when detecting point a,
No change occurs in the pressing operation of the actuator 301 by the detection lever 293.

Therefore, even if the above-mentioned positional deviation occurs, the actuator 301 always maintains the correct stroke SlO.・The on/off switching operation of the detection switch S2 can always be performed accurately. That is, for example, when the force set 9 is attached, the force set 9 may rise slightly from its normal position, or the position of the accidental erasure prevention piece 30a relative to the lower surface of the force set 9 may be incorrect.1. The relative position of the detection lever 243 with respect to the actuator 301 may be slightly shifted, or due to manufacturing errors of the detection lever 293 or errors in the mounting positions of the detection lever 293 and the detection switch S2, etc. However, even with this positional deviation, the present tape deck can always correctly detect the prevention of erroneous erasure. Next, the system control circuit in the tape deck described above will be explained based on FIG. 41.

The switches S and O are configured so that they are turned on the moment the record button 3 is pressed, and turned off when the record button 3 is not pressed. Similarly, switch SL,
is the pause button 10, switch Sl2 is the fast forward button 4, switch S,3 is the play button 5, and switch Sl4 is the stop button 6.
However, the switch Sl5 is configured to be turned on at the moment the rewind button 7 is pressed, and turned off when the rewind button 7 is not pressed. Next, regarding the circuit configuration, there is an integrated circuit 1C configured to memorize that each switch S, O-S, 5 has been pressed and obtain a signal of signal level 61O, and each of the switches S, O-S, and Sl5
a display circuit PL that displays that any one of the switches SlO to Sl5 has been pressed; a plunger drive circuit Pv that selects each mode based on whether any of the switches SlO to Sl5 has been pressed; and a tape drive motor. 84 and a supporting leg circuit MC.

Next, describing the circuit configuration of each switch Sl, to Sl5, one end of each switch Sll to Sl5 is connected to the earth line E, and the other end is connected to the integrated circuit 1.
It is connected to each input terminal of C, , 12, 13, 14, 15. At the moment the switches S and l are turned on, the input terminal 11 is grounded, and the input terminals 12 to 15 and the correspondingly connected switches Sl2 to Sl5 are similarly connected. It is configured.

Note that one ends of the switches S, O are connected to the anodes of the diodes D1, D2, and the cathodes of the diodes D, are connected to one ends of the switches S, 3.

Further, the cathode of the diode D2 is connected to the input terminal of the flip-flop circuit FF via the differentiating circuit T and the diode D3. The other end of the switch SlO is also connected to the input terminal of the flip-flop circuit FF, and when the switches S and O are turned on, the flip-flop circuit FF is set or reset. Further, the diode D4 is for switching the flip-flop circuit FF to a reset state when the switch Sl4 is turned on, and a description of the circuit configuration of this flip-flop circuit FF will be omitted. On the other hand, the output terminal 0 of the integrated circuit 1C is grounded to the line E,
From the other output terminals 02, 03, 04, 05, 06, and 07, a signal with a signal level of 81' can be obtained when any of the switches Sl, S, and 5 is on.

This level "F" signal is continuously obtained unless the integrated circuit 1C is reset.
Next, the circuit configuration of display circuit PL will be explained. The transistor TRl is for lighting a display lamp PLl for displaying the rematch mode, and its emitter is grounded and its collector is connected to the +B power supply line via the display lamp PLl.

The base is grounded via a bias resistor R2, and the output terminal 05 of the integrated circuit 1C is connected via a resistor RI.
When the signal level of the output terminal 05 reaches "1", the indicator lamp PL is turned on. The transistor TR2 is for lighting the display lamp PL2 that indicates the rewind mode, and its base is connected to the output terminal 04 of the integrated circuit C via the resistor R3, and the signal level of the output terminal 05 is "1". ”, the indicator lamp PL2 is turned on.

The transistor TR3 is for lighting a display lamp PL3 for displaying the fast forward mode, and its base is connected to the output terminal 03 of the integrated circuit 1C via a resistor R5, and the signal level of this output terminal 05 is set to " When the temperature reaches r゛, the indicator lamp PL is turned on.

The transistor TR4 controls on/off the motor 84 based on output signals from the output terminals 04 and 07 and the flip-flop circuit FF.

The emitter of the transistor TR4 is grounded, the collector is grounded to the +B power supply line via the load resistor R, and is also connected to the base of the switching transistor TR3O, so that the transistor TR4 is turned on and off. y) The motor 84 is controlled via transistors TR and O. Note that the base of the transistor TR4 is grounded via a bias resistor R8, and is connected to a resistor R2O connected in parallel via a resistor R7.
, R2l, and R22. One end of the resistors R and O is connected to the output terminal 07, and the resistor R
One end of 2l is connected to one end of the flip-flop circuit FF and the base circuit of the transistor TR23 via the output terminal 06, one end of the resistor R2, and the resistor R28.
Further, one end of the resistor R22 is connected to one end of the resistors R, 3, Rl8, the output terminal of the flip-flop circuit FF, and the base circuit of the transistor TR23, so that the output signals of the output terminals 06, 07 are all connected to the resistor R22.
The signal is supplied to the transistors TR6, TR, O, TR, and 3 via the transistors TR6, TR, O, TR, and TR3. The two-transistor TR5 is for controlling the plunger 198 as well as lighting the display lamp PL4 that indicates the pause mode. The emitter is grounded, the cathodes of diodes D and O are connected to the collector, and the indicator lamp P
It is connected to the +B power supply line via L4. The base is grounded via a bias resistor R, , and is connected to the output terminal 02 via series-connected resistors R, , R, O, and is turned on and off based on the output signal. It's becoming like that. 0 and the resistances R, l,
The intermediate point of RlO is connected to the collector of a transistor TR7 via a diode Dll, and when this TR7 is in an on state, the signal at the output terminal 02 is canceled.

Note that the anodes of the diodes D and O are connected in parallel with four resistors R232R24? connected to one end of each of R25, and output terminal 0 when transistor TR5 is on.
,,06 signals are canceled. Note that one end of the resistor R25 is connected to the bases of the transistors TR, O, and drives the plunger 198 by turning on and off the transistor TR5. In addition, the transistor TR6 is connected to a display lamp R that displays the recording mode.
The emitter is grounded, the base is grounded via a bias resistor R14, and a base current is supplied via resistors R, .

The transistor TR7 is turned on in the fast forward mode or the rewind mode, and is used to prevent switching to the pause mode at this time. The emitter of transistor TR7 is grounded and the collector is connected to diode Dl.
It is connected to the cathode of Rl, and is also connected to the +B power supply line via a load resistor Rl7. Further, the base is grounded through a resistor Rl6, and connected to one end of each of the resistors R27, R, and 7 connected in parallel through a resistor Rl5, and the level "1" is output from one of the output terminals 0, 04. The plunger drive circuit Pv is configured to turn on the transistor TR7 when the signal ``'' is obtained.The plunger drive circuit Pv will be explained next.

The transistor TRlO and the transistor TRll are for driving the plunger 197, and the bases of the transistors TR,O are grounded via a bias resistor Rl, and are connected to one end of a resistor Rl8.

And these transistors TR,. , TRll are turned on in the reproduction mode and when an output signal is obtained from the flip-flop circuit FF, respectively, and the plunger 197
is now being driven. Transistor TRlO
The emitter of is connected to the base of the transistor TR, , and the collector thereof is connected to one end of each of the load resistor R3O, the delay capacitor C, and the coupling capacitor C2.

Note that capacitor C1 and resistor R,, are plunger 19
This is for driving the plungers 198 and 199 after a predetermined time delay after the plungers 198 and 199 are operated. Further, the resistors R, l and R, are for supplying a predetermined base current to the transistor TRl2, and the capacitor C
2 is the transistor T due to the voltage drop of the load resistances R and O.
The on/off state of RlO is detected and the transistor TRl
2 to operate the constant voltage circuit ST.

Note that this constant voltage circuit ST is connected to plungers 197 and 1''.
After 9.8 is turned on with a high voltage, this one) is designed to maintain a low predetermined voltage. The emitter of the transistor TRl is connected in parallel with the resistors R34 and R3.
6, the other end of the resistor R34 is connected to the base of the transistor TS19, and the other end of the resistor R36 is connected to the base of the transistor TR22. When the transistor TR13 is on, these transistors TR19 and TR2
2 is turned on. transistor T
Rl, is provided for shunting, and after a predetermined time after the plunger 197 operates, the plunger 1 is activated.
This is for driving 98. The transistor TR2O is switched on and off by the transistor TRl, and when the transistor TR2O is turned on, the plunger 198 is driven via the transistor TR2l. Further, the collector of the transistor TR2O is connected to the anode of the diode Dl3 and the cathode of the diode D,4 through the capacitor C3, and after the constant voltage circuit ST is operated through the diode D, and the plunger 198 is operated, It is designed to apply a predetermined voltage. Note that the circuit constituted by the transistors TR22, TR23, and TR24 is for driving the plunger 199 after a predetermined time after the plunger 197 operates, and the diodes D and 6 are similar to the diode Dl3 described above. It acts on Next, the drive circuit MC of the motor 84
I will explain about it.

FG indicates a frequency generator, the output signal of which is supplied to the base of the transistor TR,l via the servo circuit S;
The rotation of the motor 84 is controlled by these transistors TR3l and TR32. Furthermore, motor 8
4 is turned on and off by switching transistor TR3O.
It is becoming controlled off. Note that P indicates a power supply circuit, and its output voltage is supplied to each circuit. The circuit operation will be briefly explained. Although this circuit can be switched to various modes as shown in FIG. 42, only the modes marked with * will be explained here.
[Reproduction mode] When the switch Sl3 is pressed, an output signal with a level of 11° is obtained from the output terminal 05, the transistor TR is turned on, and the display lamp PLl is lit.

At the same time, a differential signal is supplied to the flip-flop circuit FF via the differentiating circuit T, and the signal level at the output terminal of the flip-flop circuit FF changes from 6F to "0", turning the transistor TR4 off. The output signal of the circuit FF is the transistor TR
6, TRlO, and TR23, but since these transistors are all in an off state, the display lamp PL4 does not light up, and neither plunger 197 nor 199 operates. However, after a predetermined period of time after the output signal is obtained from the output terminal 05, the level L is output from the output terminal 06.
)'r output signal is obtained, and the transistors TR4, TR
IO is supplied.

On the other hand, the transistors TR, O are also turned on), and based on this, the transistor TRll is also turned on, and the plunger 197 is turned on. Also, transistor TR
, O are turned on, transistor TR19 is turned off after a time specified by the time constant of capacitor C1 and resistor R32, and resistors R23 and R2 are turned on.
The transistor TR2O is turned on by the signal from the output terminal 06 supplied through the transistor TR2O, and the plunger 198 is turned on. That is, when the switch S, 3 is turned on, the display lamp PL is turned on, and after a predetermined time, the plunger 197 is turned on, and after a further delay, the plunger 198 is turned on. Also, in this mode, the level of the output signal at the output terminal 04 is 0'', so the plunger 199 is not turned on. [Recording mode] In the recording mode, the switch S
When l3 and SlO are turned on, an output signal is obtained from output terminal 05 and 06 with a delay therefrom.

Note that the circuit operation based on the output terminals 0, 06 is the same as that in the reproduction mode, so the explanation thereof will be omitted. However, when the switch SlO is turned on, the flip-flop circuit FF is reset via the switch SlO, the diode D, and the switch Sl3, the level of the output signal of this FF becomes 1F, and the display lamp PL5 is lit. Further, after a predetermined time has elapsed after the plunger 197 operates, the shunt of the transistors TR, . is released, and the plunger 198 is operated by the output signal of the output terminal 06.

Furthermore, by releasing the shunt of the transistors TR,2, the output signal of the flip-flop circuit FF is transferred to the resistor R.
As a result, the transistor TR24 is turned on and the plunger 199 operates. That is, in the recording mode, after the plunger 197 operates, the plungers 198 and 199 operate simultaneously after a predetermined time. Also, transistor T
When R2O and TR2 are turned on, the diode Dl
3, the transistors TR and 4 are turned on via Dl6, the constant voltage circuit ST operates, and each plunger 197
, 198, 199 are specified to a predetermined voltage value. [Pause mode] First, let's talk about the case where switches S and l are pressed during playback mode.The output signal of output terminal 0 changes from "0" to 6.
1'', this signal is supplied to the transistor TR through the resistors R, O, and Rl, thereby turning on the transistor TR5.

Therefore, the display lamp PL4 lights up to indicate that the state has been switched to the pause state, and at the same time, the diode DlO
In order to cancel the output signal from the output terminal 06 that has been supplied to the transistors TR and O via the resistors R2 and R25, the plunger 198 changes from the on state to the off state. That is, when the switches S and 1 are turned on during the playback mode, the display lamp PL4 is turned on and the plunger 198 is turned off. Next, to switch to pause mode during recording mode, press switch Sll.
Turn on.

As a result, the transistor TR is turned on, the indicator lamp RL4 lights up, and the resistor R2 is connected via the diodes D and O.
, , one end of R,4, R2, is grounded. Then, the transistor TR2O is turned off, and the plunger 198 is switched from the on state to the off state, and at the same time, the flip-flop circuit FF is reset via the resistor R24, and the transistors TR,... are turned off, and the plunger 199 is also turned on. can be switched to the off state. That is, when the switch Sll is turned on during the recording mode, the display lamp PL4 lights up, and both plungers 198 and 199 are turned off.
[Fast forward remote] By turning on switch Sl2, the output level of output terminal 0 changes from 60" to 61".
As a result, the transistor TR3 is turned on and the display lamp PL3 is turned on.

At the same time, a signal is supplied to the transistor TR2O via the resistors R, 4, R, ., and the plunger 198 is turned on. Further, since the flip-flop circuit FF is set to the set state by the output signal of the output terminal 0, no signal is supplied to the transistors TR, . As a result, the plunger 199 is not turned on. That is, in the fast forward mode, the output terminal 0 is connected to the plungers 197 and 199.
, are not supplied, these do not operate, and only the plunger 198 is in the on state. [Rewind mode] By turning on the switch Sl5, the signal level of the output terminal 04 changes from 11'' to ``1'', the transistor TR2 turns on, and the display lamp PL2 lights up.

Since this and the flip-flop circuit FF are in the set state, no signal is supplied to the transistors TR, O, and the plunger 198 is not turned on. Also, the transistor TR. Since no signal is supplied to plunger 1
97 is also not turned on, only the transistors TR, . are turned on, and only the plunger 199 is turned on. Note that since the transistor TR is in the on state, the cathode side of the diode Dll is grounded,
At this time, even if a signal of level "1" is obtained from output terminal 0, it is canceled and the pause state does not occur.In other words, in the rewind mode, only the plunger 199 is switched to the on state. [Stop mode] When switches S and 4 are turned on in each of the above-mentioned modes, all signals from output terminals 02 to 07 become "0", and therefore plungers 197, 198, 199 are turned off, and each The indicator lamp is also turned off.

Note that a signal of level 61'' is obtained from the output terminal 0 when the playback mode is not the pause mode, and when the fast forward mode and the rewind mode are in effect, turning on the transistor TR4.

As a result, transistors TR and O are turned off and the motor 84 is constantly rotating. Note that when the stop mode is directly switched to the pause mode, there is no signal supplied to the transistor TR4, so the transistor TR4 is turned off. Therefore, the transistor T
R3O is turned on, the control signal supplied from the servo circuit S to the transistor TR3l is canceled, and the motor 84 stops rotating. Naoko\ will provide an explanation of Figure 42. In this Figure 42, PLA
Y indicates the playback mode, REC is the recording mode, FF is the fast forward mode, REW is the rewind mode, 1PAUSE is the pause mode, STO
P indicates a stop mode. In Fig. 42 below, (1) When a button has already been pressed, only the pause button changes when that button is pressed again.

(2) When the fast forward button is pressed, only the plunger 198 is turned on, regardless of the previous mode. (3) When you press the rewind button, the plunger 199
only is turned on. (4) Pressing the playback button turns the pause signal on and off: (4-1) When on, the playback pause mode is activated.

(Explanation number, 7, 18). (4-2) When turned off, it becomes playback mode.

(Explanation number, 1, 15). (5) When the record button is pressed, the previous state changes to recording monitor mode (5-1) when in stop mode.

(Explanation number, 2) (5-2) Does not work in playback, fast forward, rewind, or playback pause modes.

(Explanation number, 12, 23). (5-3) When the pause signal is on, the recording monitor mode is entered while the pause signal is on.

(Explanation number, 8). (6) When the pause button is pressed, the previous state is changed. (6-1) In fast forward and rewind modes, it does not operate, and in other cases, the pause signal is reversed each time the button is pressed.
And depending on the previous state, (6-1a) Stop mode←→Pause signal on state.

(6-1b) Recording monitor mode ←→ Recording monitor mode and pause signal on.

(6-1c) Playback mode←→Playback pause mode. (6
-1d) Recording mode ← Repeat reversal to recording pause mode.

(Explanation number, 6, 10, 11, 14, 17, 20, 22
, 25). (7) To enter recording mode and recording pause mode, press the play button and record button at the same time.

(Explanation numbers, 3, 9, 13, 16, 19, 24). In summary, the ejection prevention device in the force setting type recording/reproducing apparatus of the present invention has
) When switching from stop mode to pause mode or from stop mode to recording or playback mode, the brake for the take-up reel stand is slid to the operating position to release the brake for the take-up reel stand. A take-up side reel stand drive means is coupled to the take-up side reel stand for moving the tape shifter that moves the member forward to the forward position and further pulls out the tape in the force set out of the force set, and also applies winding torque. the first slider (b
) When switching from stop mode to recording or playback mode, by sliding the first slider to the operating position and then sliding it to the operating position, the brake for the supply reel stand is released. A second slider that moves the brake member forward to the forward position and presses the tape to the capstan using a pinch roller. (d) an eject mechanism for ejecting the attached force set, such as eject lever 44 in the embodiment; related mechanisms;
(e) an ejection prevention mechanism configured to prevent the ejecting operation of the ejecting mechanism in conjunction with the forward movement of the take-up side reel stand brake member, for example, a mechanism related to the slider 258 in the embodiment; The invention is characterized in that it is configured to prevent the force set from ejecting in any mode other than the stop mode.

That is, in all modes other than pause mode, recording or playback mode, and stop mode in high-speed modes such as fast forwarding and rewinding, the reel moves forward to the forward position to release the brake on the winding side reel table. The ejecting prevention mechanism is interlocked with the brake member for the take-up reel stand to prevent the ejecting operation by the ejecting mechanism.

This completely prevents accidental ejection of the force set in all modes other than the stop mode.

Therefore, it is possible to completely prevent the risk of accidental damage to the tape and tape running drive system due to the force set being accidentally ejected in a mode other than the stop mode, thereby increasing safety. This has the great advantage of providing a highly reliable device.

[Brief explanation of drawings]

The drawings show an embodiment in which the present invention is applied to a tape recorder, in which FIG. 1 is an overall perspective view, FIG. 2 is a perspective view of a force set, and FIG. 3 is a longitudinal sectional view of the force set. Fig. 4 is a partially cutaway front view showing the force set inserted into the force set holder in the forward position, and Fig. 5 is a partially cutaway front view showing the force set installed in the predetermined position. 6 is a sectional view taken along the line of FIG. 4, FIG. 7 is a sectional view taken along the line of FIG. 5, FIG. 8 is a sectional view taken along the line of FIG. An enlarged cross-sectional view, Figure 10 is an enlarged cross-sectional view taken along line X-X in Figure 5, and Figure 1.
Figures 1A to 11F are explanatory diagrams explaining the force set installation operation, Figure 12 is a front view of the tape drive mechanism in stop mode with the chassis removed, and Figure 13 is a reproduction of the same as above. Figure 14 is a front view in recording mode, Figure 15 is a front view in pause mode, Figure 16 is a front view in fast forward mode, Figure 1 is a front view in recording mode.
Figure 7 is a front view of the same as above in rewind mode, Figure 18A is a perspective view of the recording/reproduction switch drive system, Figure 18B is a perspective view of the brake mechanism, Figure 19 is a time chart,
Figure 0 is a partially cutaway enlarged front view of the mode switching mechanism in a mode equivalent to stop mode, Figure 21 is a partially cutaway enlarged front view of the same pose mode as above, and Figure 22 is Figure 20XX.
-XX cross-sectional view, Figure 23 is a cross-sectional view along the line XXl-XXl in Figure 20, Figure 24 is a cross-sectional view along the line XX-XX in Figure 20,
5 is a front view illustrating the prevention of malfunction as above, FIG. 26 is a sectional view taken along line XX-XXV of FIG. 25, FIG. 27 is a partially exploded perspective view of the same as above, and FIG. Figure XXVl -
XX-XXX cross-sectional view, Figure 31 is a perspective view of the same as above, Figure 3
Figure 2 is a front view of the front cover of the force set holder, Figure 33 is a sectional view taken along the line XXXl-XXXl in Figure 32, and Figure 34 is a front view of the front cover of the force set holder.
Figure 35 is a front view of the force set holder with the front cover removed, Figure 36 is a front view of the force set holder with the front cover attached, Figure 37 is Figure 36 XXX -XXX cross-sectional view, Figure 38 is Figure 37 XXXV
Figure 39 is an exploded perspective view of the force set holder and front cover, Figure 40 is an enlarged front view of the main parts to explain the accidental erasure prevention mechanism, Figure 41 is the circuit of the system control circuit. FIG. 42 is a drawing for explaining the driving situation of the plunger in each mode.

Claims (1)

[Claims] 1 After the tape wound on a pair of reels is mounted on a cassette housed in a housing at a predetermined position, the tape is formed on the front side of the cassette by switching to recording or playback mode. In an ejection prevention device for a cassette-type recording/playback device configured such that the tape is pulled out of the cassette through an opening, brought into contact with a recording/playback head, and then run, the tape is moved from a stop mode to a pause mode. or when switching from stop mode to recording or playback mode, the brake member for the take-up reel stand is moved to the forward position to release the brake on the take-up reel stand by sliding it to the operating position. a first slider that moves a tape shifter that moves the tape in the cassette to the outside of the cassette, and connects a take-up reel stand drive means that applies winding torque to the take-up reel stand; (b) When switching from stop mode to recording or playback mode, by sliding the first slider to the operating position and then sliding it to the operating position, the brake for the supply side reel stand is activated to release the brake for the supply side reel stand. (c) A second slider that moves the member forward to the forward position and presses the tape to the capstan using a pinch roller; (d) an eject mechanism for ejecting the mounted cassette;
) an ejection prevention mechanism configured to prevent the ejecting operation of the ejecting mechanism in conjunction with the forward movement of the brake member for the take-up side reel table, and prevent ejecting of the cassette in a mode other than the stop mode. An ejection prevention device in a cassette type recording/playback device, characterized in that it is configured as follows.