JPS6120939B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder equipped with a pinch roller mechanism with a small movement space.

In previously known tape recorders, the pinch roller is supported on a support plate in the form of a pivotable lever. Such a pinch roller support plate, that is, a pinch roller support lever, rotates from a fixed position to a contact position with the magnetic tape in conjunction with the operation of the play button, so the rotation range is required as a rotation space, and the size of the tape recorder is reduced. It has drawbacks that hinder its development.

The object of the invention is to provide a tape recorder with a pinch roller mechanism that requires only a small amount of movement space.

An embodiment of the present invention will be described in detail below with reference to the drawings. In the example, the tape recorder has a smaller area ratio than the compact cassette.
Although the present invention is embodied as a small cassette tape recorder for a small cassette of about 1/4 size, it goes without saying that the present invention is not limited to this.

As shown schematically in FIG. 1, a (cassette) tape recorder 10 according to the present invention includes a recorder body 12 having a concave tape cassette loading section 11 formed on its upper surface.
is covered by a hinge cover 13 that can be opened and closed. A stop button 14, a play button 16, and a record button 18 are provided on one side of the recorder body 12.
are arranged respectively. Also, the recorder body 1
Shift button 22 for FF and REW on the other side of 2
are respectively disposed, and a volume knob 23 and a pause button 24 are disposed on the upper end surface of the recorder main body 12, respectively. Not only FF and REW, but also queue and review can be set by operating the shift button 22. Furthermore, a condenser microphone 26, a microphone jack 27, and an earphone jack 28 are provided on the upper end surface of the recorder body 12, respectively.

A board is fixed inside the recorder main body 12, and reel shafts 32, 33 and a pinch roller 3 are mounted on the top surface of this board.
4, an electromagnetic head 35, an erase head 36, etc. are respectively disposed, and many other components are disposed on the lower surface of the substrate.

In order to reduce the weight, the substrate is preferably molded from synthetic resin rather than metal. However, in order to avoid complicating the diagram, the circuit board is removed in the diagram below, and the stop button 14, record button 16, and record button 18 are arranged at the bottom of the diagram to make it easier to understand the operation. .

The various components attached to the board will be briefly explained with reference to FIG.
Each is fixed at 0. Stop button plate 38
The cassette can be ejected by interlocking the eject plate 42 and eject lever 43. The play button plate 39 consists of a first play button plate 46 to which the play button 16 is fixed, and a second play button plate 47 to which the pinch roller 34 and the electromagnetic head 35 are attached and which extends to the vicinity of the shift button plate 41. A second play button plate is formed on the first play button plate and positioned between the base plate and the first play button plate. When the first play button plate 46 is pressed, the second play button plate 47 is also pressed integrally. Then, by moving the second play button plate 47, the power switch 49 is turned on, and the brake shoe 51 of the brake mechanism 50 is moved to the reel gears 52, 5.
Departs from 3. Further, the play button plate 39 is locked in its pressed position by a seesaw lever 66 of the lock mechanism 54 provided on the side surface of the opposing board. A support substrate 56 is fixed to the other side of the substrate as an auxiliary substrate, and an erroneous erasure prevention lever 58 is rotatably disposed on the support substrate. In addition, when the power switch 49 is operated, a motor (not shown) is activated.
The driving force transmitted from the reel to the flywheel 59 is transmitted to the reel shafts 32 and 33 by a drive mechanism 60 having a large number of gears that mesh appropriately in accordance with modes such as play and record.

Further, each component will be explained in detail.
First, regarding the lock mechanism 54, as can be seen from FIGS. 2 and 3, the lock mechanism includes a seesaw lever 66 rotatably disposed on one side of the base plate facing the play button plate 39. The seesaw lever 66 is arranged vertically with respect to the board and the play button plate 39, and as can be clearly seen from FIG.
A torsion spring 7 is wound around a planted pin 67 on the seesaw lever, and each end of the spring comes into contact with a planted pin 68 on the support substrate 56 and a bent piece 69 of the seesaw lever.
0, it is subjected to a clockwise biasing force around the rotation axis 71. The planting pin 68 is a seesaw lever 66
It also acts as a stopper to restrict counterclockwise rotation. The seesaw lever 66 has an engaging piece 74 that bends inward at one end on its upper edge, an engaging piece 75 that bends outward at its lower edge, and has an engaging piece 75 that bends inward at its other end. Guide piece 7
6 on the upper edge. The clockwise rotation of the seesaw lever 66 is regulated by a downwardly extending lock piece 77 coming into contact with the first play button plate 46 of the play button plate 38.

As can be seen from FIG. 3, the first play button plate 4
6 indicates two guide pins implanted on the board and the first
Its sliding movement is guided by a pair of guides 80 and 81 consisting of two elongated guide grooves formed in the play button plate. and seesaw lever 6
The lock piece 77 of No. 6 is brought into contact with the stepped piece 82 of the first play button plate 46, and this stepped piece 82 is located at the same level as the first play button plate 47. The tip of the stepped piece 82 is slightly separated from the end surface of the second play button plate, and when the first play button plate 46 is pressed and slides, the second play button plate 46 is moved away from the end surface of the second play button plate in the latter half of the sliding stroke. 47 and acts to further slide the second play button plate. 1st
The second play button plate 47 located overlapping the play button plate 46 has three guides 86, 87, 8 consisting of three guide pins and three elongated guide grooves.
Its sliding movement is guided by 8. Embedded pin 92 of another stepped piece 91 of the first play button plate 46
One end of the torsion spring 93 wound around the second play button plate 47 contacts the planted pin 94 extending downward from the second play button plate 47 and biases the planted pin 94 against the stopper piece 95 of the first play button plate. ing. By elastically holding the planted pin 94 between the stopper piece 95 and one end of the torsion spring 93, integral operation of the first and second play button plates is ensured. The other end of the torsion spring 93 is in contact with the stepped portion of the stepped piece 91 .
One end of a torsion spring 99 disposed on the board comes into contact with the implant pin 98 on the second play button plate 47, thereby applying a biasing force to press the play button plate 39 in the home position direction. .

When the first play button plate 46 is pressed together with the play button 16 from the fixed position, the pressing force is transmitted to the second play button plate 47 due to the resilient clamping of the implanted pin 94, thereby resisting the biasing force of the torsion spring 99. Then, the first and second play button plates slide inward. The sliding stroke is regulated by a guide. Seesole lever 6
Since the lock piece 77 of No. 6 is in contact with the stepped piece 82 of the first play button plate 46 due to the biasing force of the torsion spring 70, the lock piece 77 slides on the stepped piece 82 during the sliding stroke. move. At the end of the sliding stroke, the locking piece 77 falls from the stepped piece 82 onto the first play button plate 46 at the lower level.
Even if the pushing force on the first play button plate 46 is removed in a state where the lock piece 77 has fallen below the stepped piece 82, the lock piece 77 will engage with the step of the stepped piece 82 and the play button plate 39 will be locked. In order to lock the button, the play button plate is blocked by the locking piece 77 and cannot return to its normal position, so it is locked in the pressed position.

Generally speaking, conventional lock mechanisms are equipped with a lock member that rotates in the horizontal direction, but the illustrated lock mechanism 54 uses a seesaw lever 66 that rotates in the vertical direction as a lock member, making it easier to install the lock mechanism. Space is reduced. Also seesaw lever 6
6 is not overlapped on the board and does not require any specific installation space in the thickness direction of the board. Therefore, it is possible to make the tape recorder smaller and thinner. Furthermore, since the seesaw lever 66 is disposed on the side surface of the board, the rigidity of the side surface of the board against pressing of the stop button 14, play button 16, and record button 18 can be increased.

As shown in the figure, the play button plate 39 has two overlapping play button plates 46 and 47, which are connected by resiliently holding a planting pin 94 using a torsion spring 93. There is. The stepped piece 82 of the first play button plate 46 is located slightly away from the second play button plate 47.

Therefore, when the first play button plate 46 is pressed through the play button 14, the second play button plate 47 slides integrally with the first play button plate due to the resilient clamping of the planted pin 94. . After sliding to a certain extent, the second play button plate 47 temporarily stops, and then the stepped piece 82 comes into contact with the second play button plate 47, so that the second play button plate further slides. When the pushing force is removed, the first play button plate 46 is pushed back by the biasing force of the torsion spring 93, and after being placed in a predetermined lock position, the torsion spring 93
The biasing force is applied to the stopper piece 95 via the implant pin 94.
As a result, the second play button plate 47 further slides slightly and is placed in a predetermined lock position. In the conventional configuration, the play button plate is formed of one plate, but the illustrated play button plate 39 has two play button plates 46 and 47, and a second one at the rear where no direct pressing force acts. A magnetic head 35 is attached to the play button plate 47 and a torsion spring 9 is attached.
3, the biasing force is constantly acting, so the head does not fluctuate and changes in sound quality during play are prevented. In addition, in the queue and review mode, it is sufficient to move only the second play button plate 47, on which the electromagnetic head 35 is installed, slightly away from the magnetic tape against the biasing force of the torsion spring 93, and the play button plate 39 itself is moved back. There's no need to do it. It should be noted that the stepped piece 82 of the first play button plate 46 is separated from the end surface of the second play button plate by a distance that allows slight fluctuation of the second play button plate 47 in this case. Not even. Further, the pinch roller 34 is also attached to the second play button plate 39, and this pinch roller is not directly pressed against the capstan shaft by the pressing force acting on the first play button plate 46, but is pressed by the torsion spring 93. is elastically pressed by the biasing force of Therefore, a constant pushing force independent of the pushing force acting on the first play button plate 46 can be transmitted from the pinch roller to the capstan shaft. In other words, the configuration using the two play button plates 46 and 47 also functions as a shock absorber.

In the conventional configuration, the pinch roller 34 was supported by a rotating pinch roller lever, whereas in the illustrated pinch roller mechanism 100, the pinch roller 34 is supported and slid by a sliding play button plate 39. . Therefore, while the conventional rotating pinch roller support lever requires a large rotation range in the lateral direction, the slide type pinch roller mechanism 83 in which the pinch roller support plate slides together with the play button plate 39 requires a small sliding space. However, the horizontal space can be effectively used as an installation space for other components such as a liquid crystal counter and an audio amplifier. Also, pinch roller 3
The pinch roller support plate 101 supporting the roller 2 is made up of two guide pins and two elongated guide grooves.
A first support plate 104 is slidably disposed on the second play button plate 47 by guides 102 and 103, and a second support plate is bolted onto the first support plate. 105. The first support plate 104 has an upright guide wall 109 and elongated guide grooves 102 and 103, and is mounted on the second play button plate 47 by locking E-rings to guide pins, respectively. ing. Here, the implanted pin 94 of the second play button plate 47 also serves as a guide pin of one guide 103. Since the planting pin 94 extends through the partially circular upright guide wall 109 and sufficiently contacts the inner surface of the guide wall, the side play of the pinch roller support plate 101 is sufficiently regulated. Therefore, the pinch roller is sufficiently prevented from collapsing in the running direction of the magnetic tape. Further, one end of a torsion spring 107 wound around the implant pin 106 on the second support plate 105 is in contact with the implant pin 94 . Therefore, the pinch roller 34 is constantly biased inwardly by the torsion spring 107 and is prevented from falling to the side by the upright guide wall 109, so that the pinch roller 34 is tilted under a constant biasing force. The capstan shaft 108 comes into contact with the capstan shaft 108 without any movement.

A record button board 40 located adjacent to the play button board 39 is located below the second play button board 47 and is at approximately the same level as the first play button board 46. As can be seen from FIGS. 1, 6, and 7, the record button plate 40 has an engagement piece 112 that can be engaged with the first play button plate 46; It has a bent piece 113 to ensure sufficient engagement of the piece 112. Also record button plate 40
is a tension coil stretched between a hook-shaped locking piece 115 bent laterally from a vertically bent piece 114 extending along the side surface of the substrate, and a locking piece 116 bent downward from the support substrate 56. It is biased in the direction of the home position by a spring 117. The sliding movement of the record button plate 40 is guided by a pair of guides 119 and 120 consisting of two guide pins and two guide grooves, and the guide pin and guide groove of one guide 120 are connected to the first play button plate. This corresponds to the guide pin and guide groove that constitute the guide 81 of No. 46. The normal position of the record button plate 40 is a bifurcated piece 118 bent from the vertical bending piece 114 and a stopper piece 119 bent downward from the accidental erasure prevention lever 58.
It is regulated by coming into contact with the Further, a seesaw lever 123 is rotatably attached to the vertically bent piece 114 of the play button plate 40. This seesaw lever 123 has a torsion spring 1 wound around a planted pin 124 attached to a lower bent piece of the support plate 56.
25 is in contact with the planted pin 126 on the seesaw lever, so that the sixth
In the figure, it is subjected to a biasing force in the clockwise direction. An eccentric pin 130 attached to the lower bent piece of the support board 56 functions as a stopper for the seesaw lever 123. This eccentric pin 130 also functions as a stopper for the seesaw lever 66 of the lock mechanism 54. The seesaw lever 123 has a locking piece 131 at the outer end and a locking piece 13 at the inner end.
2 and a curved engagement piece 134, the locking piece 1
31 is capable of being engaged with an engaging piece 75 of the seesaw lever 66, and a locking piece 132 is capable of being locked with a locking piece 133 formed on the upper bent piece of the second play button plate 47, respectively. An erase head support plate 135 on which the erase head 36 is mounted is slidably mounted on the record button plate 40. The erasing head support plate 135 is pressed by the biasing force of the torsion spring 137 wound around the implant pin 136 on the board, and the protruding piece 138 of the erasing head support plate is pressed against the tape guide on the second play button plate 47. The position of the erasing head 36 is regulated by contacting the piece 139. In this way, using the tape guide piece 139, the erasing head 3
6 is automatically positioned, no special positioning material is required.

When the play button plate 39 and the record button 40 are in their normal positions, the second play button plate 47 is moved as shown in FIG.
The locking piece 133 is located at a lower level than the locking piece 132 of the seesaw lever 123 of the record button plate 40.
Therefore, even if the play button plate 39 is pressed, the locking piece 13
3 does not come into contact with the locking piece 132, and the record button plate 40
does not slide together with the play button plate. When the play button plate 39 is pressed, the play button plate is locked in the pressed position by the clockwise rotation (in FIG. 4) of the seesaw lever 66 of the lock mechanism 54, as described above. If the seesole lever 66 is rotated clockwise until the upper bending piece 74 comes into contact with the eccentric pin 130, the lower engagement piece 75 of the seesole lever 66 will be attached to the seesole lever 123 on the play button plate as shown in FIG. It is in a position where it can come into contact with the locking piece 131. Therefore, even if the record button 18 is pressed during the play mode for follow-up recording, the locking piece 131 of the seesaw lever 123 will not move as far as the seesaw lever 12.
3, the record button plate 40 is prevented from sliding, making it impossible to press the record button plate. In other words, for follow-up recording, the locking piece 13 of the seesaw lever 123
However, by removing this locking piece 131 depending on the type of tape recorder or the needs of the consumer, follow-up recording can be made very easily. In this way, it is possible to determine whether follow-up recording is possible depending on the presence or absence of the locking piece 131, and by selecting either the seesaw lever without the locking piece 131 or the seesaw lever with the locking piece 131 as necessary, follow-up recording can be performed. Possible or impossible tape recorders can be easily provided.

In conventional tape recorders, except for follow-up recording, the record mode is set by pressing the play button and the record button simultaneously. In contrast, in the illustrated configuration, if only the record button plate 40 is pressed alone, the play button plate 39 also slides integrally, and the record mode can be set.
In FIG. 6, if the record button 18 is pressed,
As can be seen from FIG. 6, the engaging piece 112 of the record button plate 40 is connected to the bent piece 1 of the first play button plate 46.
13, the first and second play button plates 46, 4
Press 7 together. As shown in FIG. 7, the seesaw lever 123 of the record button plate 40 has a notch 142 adjacent to its upper edge that contacts the eccentric pin 130.
have. Since the seesaw lever 123 is biased clockwise by the torsion spring 125 in FIG. Rotate to.
The locking piece 132 of the seesaw lever 123 is
to a position where it can be locked with the locking piece 133 of the play button plate 47. Therefore, the record button plate 40, which is biased in the direction of the home position by the coil spring 117, is locked in the pressed position by the locking piece 132 coming into contact with the locking piece 133. Detailing the pressing stroke of the record button plate 40,
When the locking piece 112 of the record button plate comes into contact with the bent piece 113 of the first play button plate 46, the record button plate accompanies the first and second play button plates 46, 47 until a predetermined pressing position is reached. and slide. After that, when the pushing force is removed, the record button plate 40 is pushed back by the biasing force of the coil spring 117 until the locking piece 132 comes into contact with the locking piece 133, and the locking piece 132 is locked with the locking piece 133. Locked by It goes without saying that in the illustrated mechanism, the record button plate 40 may not only be pressed alone, but may also be pressed simultaneously with the play button plate 39.

As shown in FIG. 6, the accidental erasure prevention lever 58 is attached to the support substrate 56 by a machine screw 144, and a torsion spring 145 is wound around the machine screw. One end of this torsion spring 145 is connected to a machine screw 144.
The other end is in contact with the upper bent piece 146 of the erroneous erasure prevention lever 58. Therefore, the accidental erasure prevention lever 58 is biased counterclockwise in FIG. Rotation of the accidental erasure prevention lever is restricted. 6th
As can be seen from the figure, the erase prevention piece 150 that can come into contact with the erase prevention lug of the tape cassette (not shown) loaded in the cassette loading section 11 and the slide path of the seesaw lever 123 of the record button plate 40 Stopper pieces 151 that move to prevent sliding of the seesaw lever extend from the bent piece 149 to opposite sides. If the erroneous erasure prevention lug of the loaded tape cassette has not been removed and the tape has not yet been recorded, press the record button 18 and press the record button plate 40.
Even if the bifurcated piece 118 moves, the accidental erasure prevention lever 5
The erroneous erasure prevention piece 150 of No. 8 is slightly rotated counterclockwise by the biasing force of the torsion spring 145 and comes into contact with the erroneous erasure prevention lug. Therefore, further counterclockwise rotation of the accidental erasure prevention lever 58 is prevented.
Since the stopper piece 151 does not move into the sliding path of the seesaw lever 123, the pressing of the record button plate continues unhindered, and the record mode is set.
However, if a recorded tape cassette from which the erroneous erasure prevention lug has been removed is loaded, the stopper piece 151 can enter the tape cassette through the hole from which the lug has been removed without being obstructed by the erroneous erasure prevention lug. Therefore, even if the record button plate 40 is pressed by mistake when loading a recorded tape cassette from which the erroneous erasure prevention lug has been removed, the erroneous erasure prevention lever 58 will follow the movement of the bifurcated piece 118 and prevent the stopper piece 151 from inside the tape cassette. It is quickly rotated counterclockwise by the biasing force of the torsion spring 145 so that it enters the hole. As shown in FIG. 10, the stopper piece 151 moves into the sliding path of the seesaw lever 123 due to the counterclockwise rotation of the accidental erasure prevention lever 58, and the tip of the seesaw lever 123 comes into contact with the stopper piece 151, so that the record button is pressed. Sliding of the plate 40 is no longer possible.
The play of the record button plate 40 until it cannot be pressed is regulated by the distance between the tip of the seesaw lever 123 and the stopper piece 151 and the fixed position of the erroneous erasure prevention lever 58 before it is rotated. Here, the normal positions of the accidental erasure prevention lever 58 are the bifurcated piece 118 and the stopper piece 11.
It is determined by the contact with 9. Here, the bifurcated piece 118 can easily deform the abutting piece with the stopper piece by using the notch in the middle, and by deforming the abutting piece on the stopper piece 119, the erroneous erasure prevention lever 58 can be set. Position can be easily controlled.

As described above, the erroneous erasure prevention lever 58 has an erroneous erasure prevention piece 150 and a stopper piece 151 at the free end sufficiently spaced from the rotation axis, and also has a torsion spring 1.
45, the record button plate 4
It can be rotated quickly with the sliding movement of 0. Therefore, by just slightly sliding the record button plate, erroneous erasure can be detected reliably and quickly, and erroneous erasure of the recorded tape can be completely prevented. Also, the play of the record button plate 40 is due to the stopper piece 119 of the accidental erasure prevention lever 58.
This can be easily controlled by deforming the abutting piece of the stopper piece of the bifurcated piece 118 of the record button plate that abuts on the record button plate.

Stop button plate 38 to which the stop button 14 is fixed
As shown in FIG. 2, is arranged below the board adjacent to the play button plate 39 on the side opposite to the record button plate 40. This stop button plate 38 is
As can be seen from FIG. 11, a pair of guides 160 are formed of two guide pins extending downward from the board and two guide grooves formed in the stop button plate.
161. One end of the torsion spring 164 wound around the planting pin 162 of the base plate contacts the guide pin of the guide 161, and the other end contacts the lower bent piece 165 of the stop button plate 38, so that the stop button plate 38 is moved. Biased in the home position direction. The fixed position of the stop button plate 38 is regulated by the guide pin of the guide 160 coming into contact with the end surface of the guide groove.

As can be seen from FIGS. 11 and 12, the eject lever 42 located on the board has a bent piece 168 located on the side of the board, and is formed between two guide pins on the board and the eject lever. Ta2
A pair of guides 169, 1 consisting of guide grooves
Its sliding movement is guided by 70. Here, one guide 169 is formed with play so that the eject lever 42 can move upward. This eject lever 42 has one end of a torsion spring 173 wound around an implant pin 172 on the side of the board connected to the guide pin of the guide 170 and the other end connected to the bent piece 16.
The eject lever 42 is biased toward the home position by contacting the eight implant pins 174, respectively. The fixed position of the eject lever 42 is regulated by the guide pin of the guide 170 coming into contact with the end surface of the guide groove. In addition, the eject lever 42 has a curved guide piece 176 at its tip so that it can slide along the upper edge of the seesaw lever 66.
A shoulder 178 that can come into contact with an actuation piece 177 that protrudes laterally from the stop button plate 38 is a bent piece 168.
is formed. Furthermore, a cam piece 1 that can come into contact with a guide piece 76 formed on the upper edge of the seesaw lever 66
82 extends inward from the front upright wall of the stop button plate.

As can be clearly seen from FIG. 12, the eject lever 43, which is disposed on the board and which springs upward, is rotatably attached by an implant pin 172 on the side of the board. Then, one end of the torsion spring 173 that the planting pin 174 of the eject plate 168 abuts extends further, and the side locking piece 18 of the eject lever
It also touches 3. The corresponding end of the torsion spring 173 first contacts the planting pin 174 and slides the eject plate 42 in the fixed position direction, and then the locking piece 1
74. The torsion spring 173 also serves to prevent the eject lever 43 from rattling.

As described above, when the play button plate 39 is pressed, the seesaw lever 66 of the lock mechanism 54 rotates clockwise around the rotation shaft 71 to lock the play button plate in the pressed position. In this lock position,
The seesaw lever 66 is lowered on the record button side and raised on the stop button side. The upper end of the seesaw lever 66 on the rising side is connected to the eject plate 4 as shown in FIG.
When viewed from FIG. 12, the eject plate is rotated counterclockwise around the guide pin of the guide 170 of the eject plate against the biasing force of the torsion spring 173 and pushed up. Seesole lever 66
In the position where the eject plate 42 is pushed up by
(see figure). Therefore, even if the stop button plate 38 is pressed in the play mode or record mode in which the play button plate 39 is locked, the operating piece 177 does not come into contact with the shoulder 178, and only the stop button plate slides, and the eject plate 42 does not slide at all. do not. However, the cam piece 182 of the stop button plate 38 comes into contact with the raised guide piece 181 of the seesaw lever 66 and presses the guide piece 181 downward, causing the seesaw lever 66 to rotate clockwise against the biasing force of the torsion spring 70. do. Since the lock piece 77 of the seesaw lever is raised by the counterclockwise rotation of the seesaw lever 66, the play button plate 39 is returned to its home position by the biasing force of the torsion spring 99 without being hindered by anything. In the play mode in which the record button plate 40 is pressed and locked together with the play button plate 39, as shown in FIG. The record button plate is locked by coming into contact with the engagement piece 133. Therefore, when the play button plate 39 is unlocked and the play button plate returns to the normal position, the record button plate 40 follows the rotation of the engagement piece 133 by the biasing force of the coil spring 117 and returns to the normal position. Return. At this time, the eccentric pin 130 is disengaged from the notch 142, so that the seesaw lever 123 rotates against the biasing force of the torsion spring 125 and returns to its home position.

The stop button 14 of the stop button plate 38 has the stop function of returning the play button plate 39 alone or together with the record button plate 40 to the normal position as described above, and can also operate the eject plate 42 to eject the play button plate 39. In other words, if the play button plate 39 is in the normal position, the eject plate 42 will not be pushed up by the seesaw lever 66, and the shoulder 178 of the eject plate will move along the movement path of the operating piece 177 of the stop button plate 38, as shown in FIG. It's within. Therefore, when the stop button plate 38 is pressed, the actuation piece 177 comes into contact with the shoulder 178 and the eject plate 42 also slides together with the stop button plate, as shown in FIG. It comes into contact with the end face of the electric lever 43. When the stop button plate 38 is further pressed, the eject lever 43 is pressed by the planting pin 172.
The planted pin 1 resists the biasing force of the torsion spring 173.
The tape cassette is ejected by the counterclockwise rotating force around 72, and the eject lever springs up. As described above, the stop button 14 of the stop button plate 38 has a multi-functionality, serving as a stop function in the play and record modes, and as an eject button in the stop mode. The stop button 14 having such multi-functions not only reduces the number of parts by simply eliminating the eject button, but also sufficiently improves the operability of the tape record.

The drive mechanism 60 that transmits the driving force from the motor to the reel shaft includes a flywheel 59 that rotates integrally with the capstan shaft 108. As shown in FIGS. 15 and 16, this flywheel 59 is formed by outsert a metal frame or brass onto plastic, and has external gears 187 molded from plastic and internal teeth. Gears 188 are arranged at the center and on the inner surface of the outer periphery. The external gear 187 has a flanged annular portion 189 on the gate side, and a wedge-shaped engagement piece 190 protrudes from the inner circumferential surface and engages inside the solid wheel body 191, so that the thrust direction of the external gear Also, radial direction slippage and collapse are completely prevented. The internal gear 188 also has a large number of flanged gate pieces 193 on the gate side.
(only a portion is shown in FIG. 15), and a wedge-shaped engagement piece 194 protrudes from the outer peripheral surface and engages inside the wheel body 191, causing the internal gear to come off in the thrust direction and radial direction. Prevents folding. In this way, by forming the wheel body of the flywheel 59 from metal and outsert the internal and external gears by plastic molding, a flywheel that is completely prevented from coming off and collapsing can be obtained at low cost. Then, such a flywheel 59 is removed, and folding is completely prevented, and a tape recorder with no rattling and low gear noise is obtained.

As shown in FIG. 17, the drive mechanism 60 includes a steady running idle gear 199 attached to a steady running lever 198 rotatably mounted on a base plate by a rotation shaft 197. In the steady running idle gear 199, the steady running lever 198 is connected to a torsion spring 20 wound around a planted pin 200 on a base plate.
External gear 187 of flywheel 59 by 1
By receiving a biasing force in the direction of the external gear 187 and the reel gear 52,
It is meshed with 2. Therefore, during steady running, the driving force transmitted from the motor (not shown) to the flywheel 59 by the endless belt (not shown) is transmitted from the flywheel's external gear 187 to the idler gear 199 to the reel gear on the take-up reel side. 52. The free end of the steady running lever 198 has a bifurcated piece 203, and a guide pin 206 is implanted in one end of a steady running release lever 205 which is rotatably mounted on the base plate by a rotation shaft 204 and extends upward. This forked piece 20
It is restricted within 3. A guide pin 207 is also implanted at the other end of the steady running release lever 205, and this guide pin extends downward to release the torsion spring 2.
The biasing force of 01 causes the cam surface 2 of the shift button plate 41 to
It is in contact with 08. However, when the shift button plate 41 is slid from the neutral position shown in FIG. 17 in the FF or REW direction as shown in FIG. 19 or FIG. A clockwise rotational force is generated on the steady running release lever 205 around this point. Here, the steady running release lever 205 and the steady running lever 198 are connected by a guide pin 206 being restrained by the bifurcated piece 203. Therefore, torsion spring 2
The lever 205 resists the biasing force of the rotation shaft 20
4, the lever 198 rotates clockwise around rotation axis 1
97 in a counterclockwise direction. Then, when the steady running lever 198 rotates counterclockwise around the rotating shaft 197, the idler gear 199 on the lever 198 moves to a position where it does not mesh with either the external gear 187 or the reel gear 52, and the steady running is canceled. Ru. Shift button plate 41 is FF,
When in the REW position, the guide pin 207 is pressed against the cam surface 208 by the biasing force of the torsion spring 201, so that the idler gear 199 is reliably maintained at the steady running release position.

As shown in FIGS. 3 and 17, the brake mechanism 50 includes a brake lever 211 to which a brake shoe 51 made of a soft material such as rubber, which contacts the reel gears 52 and 53, is fixed. Lower bent piece 2 of this brake lever 211
12 is brought into contact with one end of a torsion spring 214 wound around a pin 213 on the base plate, and the brake shoe 51 on the brake lever is pressed by the reel gears 52 and 53 to prevent the rotation of the reel shafts 32 and 33. It is prevented. The brake shoe 51 may be configured not to be brought into direct contact with the reel gears 52 and 53, but brought into contact with a disk coaxial with the reel gears. The brake lever 211 has a play button plate 39 with a spring 9
When pressed against the biasing force of 9, the engagement piece 216 of the second play button plate 47 engages the shoulder 2 of the brake lever.
17, it slides together with the play button plate 39. The brake lever 211 slides between two guide pins on the board and the brake lever 211.
It is guided by a pair of guides 218 and 219 consisting of elongated guide grooves formed in the grooves.
One guide 219 is formed with a sufficient gap left between the guide pin 220 and the elongated guide groove 221 to allow the guide lever 211 to swing. The guide pin of the other guide 218 is a planted pin 213 around which a torsion spring 214 is wound.
matches. A triangular cam groove 223 is formed at one end of the brake lever 211, and a guide pin 224 on the shift button plate 41 projects into the cam groove 223. This guide pin 224 contacts the cam surfaces 225 and 226 when the shift button plate 41 slides for FF and REW, and the torsion spring 214
The brake lever 211 can be slid in the direction in which the brake shoe 51 moves away from the reel gears 52 and 53 against the biasing force of the brake lever 211 .

As can be seen from FIG. 17, the drive mechanism 60 is
It further includes an FF gear 230 and a REW gear 231, which are connected to an FF lever 234 which is rotatably mounted on the base plate by rotation shafts 232 and 213.
It is arranged at one end of the REW lever 235. Here, the rotation axis of the REW lever 235 is the torsion spring 2.
This corresponds to the 14 wrapped guide pins 213. Then, the other end of the torsion spring 214 comes into contact with the lower bent piece 236 of the REW lever, and the guide pin 2
Around 13, a counterclockwise biasing force is applied to the REW lever. A guide piece 239 formed at the other end of the REW lever 231 is pressed by the biasing force of the torsion spring 214 against a cam surface 240 of the shift button plate 41 and an annular grooved guide pin 241 on the base plate. The operation of the REW lever 231 is based on the guide pin 2.
44. Further, an intermediate gear 242 that can mesh with the internal gear 188 of the flywheel 59 is coaxial with the REW gear 231 and is attached downwardly to one end of the REW lever 235. On the other hand, a pulley 243 that can be pressed against the outer peripheral surface of the flywheel 59 via an endless belt is connected to the FF gear 230.
It is coaxial with the FF lever 234 and is attached downward to one end of the FF lever 234. The FF lever 234 is made of an elastic thin plate, and has a narrow curved arm 246 at one end of the guide pin. A guide pin 247 extending upward is installed at the free end of the curved arm 246, and this guide pin extends into a cam groove 248 formed in the shift button plate 41.
The curved arm 246 has a guide pin 247 that moves into the cam groove 248 when the shift button 41 is set to FF.
When pressed and deformed in the direction of arrow F, the spring functions as a spring that applies a clockwise biasing force to the FF lever 234 around the rotation shaft 234. Since one end of the FF lever 234 functions as a spring in this way, a torsion spring for the FF lever is not required, which provides advantages such as a reduction in the number of parts and a simplified configuration.

The progress of driving force transmission in the drive mechanism 60 configured as described above during neutral, FF, and REW will be sequentially described. In FIG. 18, which shows the neutral state, the driving force transmitted to the flywheel 59 is transmitted to the reel shaft 32 by the meshing between the external gear 187 of the flywheel and the idler gear 199, and the meshing between the idler gear and the reel gear 52. 32 is used as a take-up reel and runs steadily. In addition, in the FF mode, the FF lever 234 rotates counterclockwise around the rotation shaft 232 due to the biasing force of the curved arm 246 as described above, and the pulley 243 moves around the outer circumference of the flywheel 59 via an endless belt. and the FF gear 230 is pressed by the reel gear 252.
(See Figure 20). At the same time, the steady travel release lever 205 rotates clockwise around the rotation shaft 204, and the steady travel lever 198 rotates counterclockwise around the rotation shaft 197 against the biasing force of the torsion spring 201. Idler gear 199 separates from reel gear 52 and flywheel external gear 187, respectively. Therefore, as can be clearly seen from FIG. 20, the driving force is transmitted from the flywheel 59 to the pulley 243 in the FF mode. Needless to say, the pulley 243 has a smaller diameter and fewer teeth than the flywheel 59, so it rotates at high speed, and the reel gear 52 also rotates clockwise at high speed through the FF gear 230, which is coaxial with the pulley. Thereby, the reel shaft 32 rotates at high speed as a fast-forward take-up reel. Furthermore
During REW, as mentioned above, the REW lever 235
The FF gear 231 rotates counterclockwise around the guide pin 213, which is also a rotation axis, against the biasing force of the torsion spring 214.
3, the intermediate gears 242 mesh with the internal gears 186 of the flywheel 59 (see FIG. 22). Then, as in the case of FF, the idler gear 199 separates from the reel gear 52 and the external gear 187, respectively. Therefore, as can be clearly seen from FIG. 22, the driving force is applied to the internal gear 1 of the flywheel 59.
88 and the intermediate gear 242, the REW gear 231 is rotated at high speed and the reel gear 53 is also rotated at high speed. Here, since the driving force is transmitted through the internal gear 188, the rotation direction of the reel gear 53 is opposite to the rotation direction of the flywheel 59, and the reel shaft 33 is rotated counterclockwise at high speed as a fast-return take-up reel. Rotate.

As described above, the shift button plate 41 has the cam groove 2 that restrains the guide pin 247 of the FF lever 234.
48, the guide pin 207 of the steady running release lever 205, and the guide piece 23 of the REW lever 235.
9 comes into contact with cam surfaces 208 and 240. And the cam groove 223 of the brake lever 211
The guide pin 224 located inside the shift button plate 41
It is planted on the top of the. Further, the shift button plate 41 has a vertical bent piece 250 facing the back side of the board,
As shown in FIG. 23, a pair of guides 251 and 252 are formed by two guide pins made of small screws engaged with a board and located in guide grooves formed in a bent piece 250 together with a washer. The sliding movement of the shift button plate is guided by. For example, a pair of wedge-shaped switch actuation pieces 254 and 255 made of an insulating material such as plastic protrude, and when the shift button plate 41 slides, one of the switch actuation pieces moves the movable piece 256 of the power switch 49.
The power switch is turned on by bringing the movable piece into contact with the fixed piece 257.
The shift button plate 41 has a bent piece 250 so that its positioning is ensured by a quick ball system.
A series of oval positioning holes 258, 259, 26
0 is formed, and a steel ball 263 is biased so as to fit into the positioning hole by a leaf spring 262 attached to a suspension part 261 of the board. The steel ball 263 is fitted into the large central positioning hole 259 when the shift button plate 41 is in its neutral position. A guide pin 269 projects upward from the side projecting piece 268 of the shift button plate 41, and this guide pin is used as the second guide pin when the play button plate 39 is pressed.
cam surface 270 of the play button plate 47 (see Figure 3)
The second play button plate is pushed back slightly by contacting the button, thereby setting the queue and review. Furthermore, as can be seen from FIG. 17, the shift button plate 41 is
It has a triangular cam surface 272 and a bifurcated piece 273 that can be engaged with the engagement piece 134 formed on the seesaw lever 122 of the record button plate 40. As shown in FIG. 24, one of the bifurcated pieces 273 has a downward bent portion 274, and the other engaging piece 1
34 has an upper bent piece 275.

Move the shift button plate 41 from the neutral position shown in FIG.
The case where the switch is slid in the FF direction, that is, to the right in the figure, and switched to the FF position shown in FIG. 19 will be described in detail. First, the operation of each component of the drive mechanism 60 will be repeated. When the side pin 207 is moved by the cam 208, the steady running release lever 205 is rotated clockwise around the rotation shaft 204, and because the guide pin 206 is restrained by the bifurcated piece 203, the steady running lever 198 is rotated. They each rotate counterclockwise around the moving shaft 197 against the biasing force of the torsion spring 201 . The idler gear 199 on the steady running lever 198 is separated from the external gear 187 of the flywheel 186 and the reel gear 52. Furthermore, as the guide pin 247 is guided in the cam groove 248 in the F direction, the curved arm 246 is deformed and the FF lever 234
is biased counterclockwise around rotation axis 232. Therefore, the FF gear 230 on the FF lever 234
is pressed by the reel gear 52 and meshes with the pulley 2.
43 is pressed against the outer peripheral surface of the flywheel 59 via an endless belt. On the other hand, REW lever 2
35 is the REW gear 231 which does not rotate even when the shift button plate 41 moves in the FF direction, the intermediate gear 242 is the reel gear 53, and the internal gear 1 of the flywheel 236.
88, respectively, are maintained in an inoperative position spaced apart from each other. Therefore, as can be clearly seen from FIG. 20, the driving force is transmitted from the flywheel 186 to the pulley 243,
The signal is transmitted to the reel gear 52 through the FF gear 230 and rotates the reel shaft 32 at high speed. Here, regarding the brake mechanism 50, the shift button plate 41
When the shift button slides in the FF direction, the guide pin 224 on the shift button comes into contact with the cam surface 226 of the cam groove 223, causing the brake lever 211 to slide against the biasing force of the torsion spring 214. is moved away from the reel gears 52, 53 to release the brake. Further, the switch actuating piece 254 comes into contact with the movable piece 256 of the power switch 49 and brings the movable piece into contact with the fixed piece 257, thereby turning on the power switch 49 and thereby starting a motor (not shown).

Also, a case will be described in which the shift button plate 41 is slid in the FF direction with the play button plate 39 locked in the pressed position, that is, the case where a queue occurs. In this case, the power switch 49 is already turned on by the second play button plate 47 of the play button plate 39 (see FIG. 3), and the switch operating piece 254 does not operate effectively. When the shift button plate 41 is in the neutral position and the play button plate 39 is in the lock position, the second
The cam surface 270 of the play button plate 47 is connected to the shift button plate 4.
It is located adjacent to the guide pin 269 of No. 1 (see FIG. 17). Therefore, when the shift button plate 41 slides in the FF direction, the guide pin 269 comes into contact with the cam surface 270 and moves the second play button plate 47 from the position shown by the dashed line to the position shown by the chain double dotted line as shown in FIG. Push it back slightly into position. Here, as described above, the second play button plate 47 is configured so that the implanted pin 94 on the second play button plate is biased by the torsion spring 93 to the stopper piece 95 of the first play button plate 46. Therefore, it is elastically connected to the first play button plate. Therefore, the displacement of the second play button plate 47 given by the shift button plate 41 is absorbed by the deformation of the torsion spring 93, and the first play button plate 46 does not move at all. Then, due to the slight displacement of the second play button plate, the pinch roller 34 and the magnetic head 35 on the second play button plate are slightly separated from the magnetic tape. Therefore, a slight gap is created between the pinch roller 34 and the capstan shaft 108, and a queue state can be set in which the reel shaft 32 is rotated at high speed clockwise while the magnetic tape is brought into slight contact with the magnetic head 35.

However, when the record button plate 40 and the play button plate 39 were in the lock position, the shift button plate 41
Even if you press in the FF direction, the shift button plate will not slide. That is, when the record button plate 40 is locked, the engaging piece 134 of the seesaw lever 122 is on the bifurcated piece 273 of the shift button plate 41, as shown by the dashed line in FIG. As can be seen from FIG. 23, the downward bent portion 274 formed on one side of the bifurcated piece 273 faces the inclined surface of the engaging piece 134, while the other piece of the bifurcated piece is located above the engaging piece 134. It faces the bent portion 275. Therefore, the shift button plate 41
Even if you try to slide it in the FF direction, the bifurcated piece 273
is obstructed by contacting the upper bent portion 275 of the engagement piece 134, so that the shift button plate does not move any further. Therefore, even if the shift button plate 41 is accidentally pressed in the FF direction in the record mode, the shift button plate will not slide, and malfunctions can be completely prevented.

Furthermore, slide the shift button plate 41 from the neutral position shown in FIG. 17 in the REW direction, that is, to the left in the figure,
The case of switching to the REW position shown in FIG. 1 will also be described in detail. When the drive mechanism 60 first rotates, the guide pin 20 is moved by the cam 208.
9 moves, the idler gear 199 moves away from the external gear 187 and the reel gear 52 through the same operation as at the time of FF. Also, guide pin 2
47 only moves laterally within the cam groove 248, and the curved arm 246 does not deform and does not generate any biasing force, so the FF lever does not move and the FF gear 23
0, pulley 243 is maintained in its inoperative position. On the other hand, the biasing force of the torsion spring 214 causes the guide piece 239 to rotate around the planted pin 213, which is the rotation axis, so as to come into contact with the inclined surface of the cam surface 240.
By rotating the REW lever 235, the FF gear 231, the reel gear 53, the intermediate gear 242, and the internal gear 188 of the flywheel 236 are brought into mesh with each other. Therefore, as can be clearly seen from FIG. 22, the driving force is transferred from the flywheel 59 to the internal gear 1.
88 and is transmitted to the gears 242, 231 and the reel gear 53 to rotate the reel shaft 33 at high speed. Here, since the driving force is transmitted to the reel shaft 33 via the internal gear 188, the reel shaft 33 rotates in a direction opposite to the rotational direction of the flywheel 59. Regarding the brake mechanism 50, the shift button plate 41 is REW.
Guide pin 2 on the shift button plate when sliding in the direction
24 comes into contact with the cam surface 256 of the cam groove 223 to move the brake shoe 51 away from the reel gears 52, 53 and release the brake. On the other hand, the switch operating piece 255 comes into contact with the movable piece 256 and brings the movable piece into contact with the fixed piece 257, thereby turning on the power switch and thereby starting a motor (not shown).

Also, a case will be described in which the shift button plate 41 is slid in the REW direction with the play button plate 39 alone or together with the record button plate 40 locked in the pressed position, that is, the case of a review. In this case, the power switch 49 is already turned on and the switch operating piece 255 does not operate effectively. Shift button plate 4
1 is in the neutral position and the play button plate 39 is in the lock position, the cam surface 270 of the second play button plate 47 is located adjacent to the guide pin 269 of the play button plate 41. Therefore, the shift button plate 41
When sliding in the REW direction, the guide pin 269 comes into contact with the cam surface 270, so that the second play button plate 47 is slightly moved from the one-dot chain line position to the two-dot chain line position in the same way as in the FF case described above. Push back.
Therefore, as in the case of FF, there is a slight gap between the pinch roller 34 and the captan shaft 108, and a review state is set in which the reel shaft 33 is rotated counterclockwise while the magnetic tape is slightly in contact with the magnetic head 35. can. Here, if the record button plate 40 and the play button plate 39 are in the lock position, the engagement piece 134 of the seesaw lever 122 will be moved as described above.
As shown by the dashed line in FIG. 17, the shift button plate 4
It is on the bifurcated piece 273 of 1. However, unlike in the FF mode, when the shift button plate 41 is pressed in the REW direction, the lower bent piece 274 of the bifurcated piece 273 comes into contact with the inclined surface of the engaging piece 134, as shown in FIG. The shift button plate can slide without being hindered by the engagement piece. At this time, the downward bent piece 27
4 pushes up the engagement piece 134, the seesaw lever 123 is engaged by rotating counterclockwise against the biasing force of the torsion spring 125, as shown by the dashed line in FIG. The stopper piece 132 is the second
from the locking piece 133 of the play button plate 47.
Here, the seesaw lever 123 has a locking piece 13 at the tip.
1 is the engagement piece 75 of the seesaw lever 66 for locking.
Rotate sufficiently until it is located at a lower level than the In the record button plate 40, the locking piece 132 is the locking piece 1.
33 and becomes free, returning to the home position by the biasing force of the coil spring 117. When the record button plate 40 returns, the locking piece 131 passes below the engagement piece 75 and does not come into contact with the bent piece, so the locking seesaw lever 66 is moved to the play button plate 3.
9 is not moved from the locked position, so the play button plate 39 is still maintained in its locked position. As mentioned above, in record mode, shift button plate 4
1 in the REW direction, only the record button plate 40 returns to its normal position, and the play button plate 39 is still maintained at the lock position. Therefore, during recording
By using REW, the recorded portion can be immediately played back, dramatically increasing the operability of the tape recorder.

In order to return from FF and REW to the neutral position shown in FIG.
235 rotates in the opposite direction to the above and returns to the corresponding home position. When switching from FF or REW to STOP, the magnetic tape is more likely to sag. Such tape slack can be prevented by first applying the brakes to the supply reel and then applying the brakes to the take-up reel. Therefore, in the illustrated brake mechanism 50, the guide pin 220 of one of the guides 218 and 219 is arranged in a guide groove 220 so as to allow the brake lever 211 to swing.
It is formed with a sufficient gap between the two. If the shift button plate 41 is slid to the left in the figure from the FF position shown in FIG. 19, the guide pin 22 of the shift button plate
4 also moves to the left together with the shift button plate. Since the brake lever 211 is biased by the torsion spring 214 in the direction in which the brake shoe 51 contacts the reel gears 52 and 53, the guide pin 224
When the cam surface 226 moves, the cam surface 226 comes into contact with the guide pin and is pushed back in the direction shown by the dashed line. At this time, since there is a sufficient gap between the guide pin 230 and the guide groove 221 to cause the brake lever 211 to swing, the brake lever 211 is moved to the second position.
As shown in FIG. 5, it moves in a clockwise swinging state about the implant pin 213. Then, when the guide pin 224 moves further, the brake shoe 51 on the brake lever first contacts the reel gear 53 on the supply side as shown in FIG.
3, and then comes into contact with the reel gear 52 on the winding side and brakes the reel shaft 32, returning to the complete braking position shown in FIG. 17. On the other hand, if you slide the shift button plate 41 to the right from the REW position, the brake lever 211
Since it moves in a counterclockwise oscillating state around the planting pin 213, it first contacts the reel gear 52 on the supply side in REW, and then contacts the reel gear 53 on the winding side, resulting in the complete state shown in FIG. 17. Return to brake position. In this way, in the illustrated brake mechanism 50, by providing one of the pair of guides 218 and 219 with a gap that allows the swing of the brake lever 211, it is possible to improve the FF and REW.
When returning to STOP, the brake shoe 51 is first brought into contact with the reel gear on the supply side to apply a brake to the reel shaft on the supply side. Then, a brake shoe is brought into contact with the reel gear on the take-up side to apply a brake to the reel shaft on the take-up side, and the brakes are not applied to the pair of reel shafts at the same time. Therefore, by first applying the brake to the reel shaft on the supply side, sufficient back tension is applied to the tape, and then the brake is applied to the reel shaft on the take-up side, so there is no room for the tape to slack, and the tape has sufficient slack. is prevented.

When the shift button plate 41 is slid in the FF or REW direction, the steel ball 263 separates from the central positioning hole 259 and moves into the corresponding positioning hole 258.
Needless to say, it is fitted within the 260 (see FIG. 22). The illustrated tape recorder 10 uses such a quick ball system to automatically shift the shift button plate 41 to the neutral position even if the stop button 14 is pressed with the shift button plate 41 locked in FF or REW. Configured to return. In other words, as shown in Figures 11 and 27,
FF, REW release plate 280 is the eject lever 42
It is arranged in parallel with the bent piece 168 of the board and guided by guides 278 and 279 on the side surface of the board. this
The FF/REW release plate 280 is an inwardly bent engagement piece 2 that can be brought into contact with the actuation piece 177 of the stop button plate 38.
81 and a guide piece 284 that is guided by a pair of guides 282 and 283 on the board and is positioned opposite to the cam surface 272 of the shift button plate 41.
85 at each end. It is biased in the direction of the stop button plate 38 by a tension coil spring 288 stretched between it and the implant pin 287 on the board. Here, as shown in the illustration, the engaging piece 2
81 is located closer to the actuating piece 177 than the shoulder 178 of the eject plate 42. Therefore, when the lock seesaw lever 66 is in the normal position and the stop button plate 38 performs the eject function, when the stop button plate is pressed, the operating piece 177 of the stop button plate first comes into contact with the shoulder 178 of the eject lever 42. The coil spring 28 contacts the engagement piece 281 of the FF, REW release plate 280 and releases the FF, REW release plate 280.
8 in the direction of the shift button plate 41. If the shift button plate 41 is in the neutral position, the first
As shown by the dashed line in FIG. 7, the guide piece 284 of the FF/REW release plate 280 does not come into contact with the cam surface 272. However, the shift button plate 41 shown in FIG.
If it is in the FF position, the guide piece 284 will touch the cam surface 27.
2 and press the shift button plate in the direction shown by the dashed line. When the shift button plate 41 moves to some extent in the direction shown in the figure by the guide piece 284 and the steel ball 263 partially fits into the center positioning hole 259, the steel ball is suddenly moved by the biasing force of the leaf spring 262. into the positioning hole 259.
In this quick ball system, which has a large-diameter positioning hole 259 in the center and presses the steel ball 263 with the leaf spring 262, it is not necessary to completely return the shift button plate 41 to the neutral position, and the steel ball 263 is pressed by the leaf spring 262. It is sufficient to move the shift button plate 41 until it partially fits into the center positioning hole 259. Therefore, the shift button plate 41 can be easily moved using the illustrated FF/REW release plate 280 and the quick ball system. . In addition, the shift button plate 41 is shown in FIG.
Even when it is in the REW position, the guide piece 284 comes into contact with the cam surface, as in the case of FF, so that the REW
The shift button plate 41 can be easily moved from the neutral position to the neutral position. Then, by further sliding the stop button plate 38, the actuating piece 177 is moved from the shoulder 1 of the eject lever 42.
78, the eject lever 4
3 can be operated. Therefore, by pressing the stop button 14, you can not only perform the stop and eject functions described above, but also directly eject the cassette from FF and REW.
The operability of the tape recorder is increased.

Describing the take-up side reel of the reel mechanism in detail, as shown in Fig. 28, the reel cover 2
92 is formed integrally with a synthetic resin substrate 293, and a sleeve bearing 2 is attached to a female thread formed on the reel cover.
A reel bearing portion is constructed by meshing the male screws 94 with each other. Like this reel cover 2
By integrally molding the support cylinder 92 with the substrate 293 instead of forming it as a separate body, the number of parts is reduced and the aesthetic appearance is improved.
Disc 2 is press-fitted into the lower end of the support cylinder and attached to the outer periphery of the support cylinder.
96 is further press-fitted, and the reel gear 52 is disposed on the pulley via the felt plate 297. A seat member 298 having a locking piece fitted into a hole in the support cylinder 295 is connected to a compression coil spring 29.
9 and is pressed against the reel gear 52. The reel shaft 32 is inserted from below the sleeve bearing 294, and a plastic rotation stopper 300 is attached to the upper end of the reel shaft. tape count is N,
Magnet ring 301 with alternating south poles
is placed on the disk 296, and a magnetically sensitive element (not shown) is combined with this magnet ring to perform electrical operation, and the disk is used as a pulley to connect the endless belt 302 to a tape counter pulley (not shown). It may also be done mechanically by constructing a bridge between the two. In order to improve the aesthetic appearance of the rotation stopper 300, it is preferable to form a long groove 303 for air relief in the reel shaft 32 instead of forming an air relief hole at the upper end of the rotation stopper. However, if necessary, a small auxiliary air hole may be provided at the upper end of the rotation stopper.

In addition, in the illustrated tape recorder 10, a cassette holder spring 310 abuts against the back of the cassette.
is a pair of bifurcated pieces 311, 31 as shown in FIG.
2. By locking the bifurcated pieces 311 and 312 to the locking protrusions 313 and 314 on the side of the board, the cassette holder spring 310
is arranged at a predetermined position on the side surface of the board. Since the cassette holder spring 310 is disposed by simply fitting the bifurcated pieces 311, 312 and the locking protrusions 313, 314, assembly is extremely easy.

In addition, in the illustrated tape recorder, the number of overlapping levers and plates is up to three, thereby making the tape recorder thinner.

As mentioned above, the pinch roller mechanism of this invention is
a head support member on which a magnetic head is placed and movable linearly between a non-contact position where the magnetic head is separated from the magnetic tape and a contact position where the magnetic head is in contact with the magnetic tape; and a head support member that rotates a pinch roller. The pinch roller is attached to the head support member so as to be movable relative to the head support member along the movement trajectory of the head support member in the direction of movement of the head support member, and the pinch roller is attached to the magnetic tape at the non-contact position. a pinch roller support member that causes the pinch roller to contact the magnetic tape at the contact position; urging means that urges the pinch roller support member relative to the head support member in a direction toward the contact position; ; characterized in that the attachment position of the pinch roller to the pinch roller support member is arranged substantially on the movement locus of the attachment position of the pinch roller support member to the head support member in the moving direction of the head support member. shall be. Such a slide type pinch roller mechanism takes the form of a lever that rotates the pinch roller support plate in the pinch roller mechanism of a conventionally known tape recorder, and requires a small sliding space compared to the large rotation space required. It just requires. Therefore, space can be used effectively and this contributes to downsizing of tape recorders. The pinch roller support plate of the pinch roller mechanism is disposed on the play button plate so as to slide in the same direction as the play button plate while being guided by a pair of guides, and at least one of the guides is connected to the guide pin on the play button plate and pinched. It is preferable that the roller support plate is brought into sufficient contact with the side surface of the guide groove.
With this configuration, the side play of the pinch roller support plate is restricted, and the pinch roller is prevented from collapsing in the running direction of the magnetic tape.

[Brief explanation of the drawing]

The drawings show a tape recorder according to an embodiment of the present invention, with FIG. 1 being a schematic perspective view showing the external appearance, and FIG. 2 being a plan view of the internal structure with the board removed.
(The following drawings define the front, right side, left side, and back side based on Fig. 2), Fig. 3 is a plan view mainly showing the play button plate and lock mechanism, and Fig. 4 is the same as Fig. 3. 5 is a plan view mainly showing the play button board, FIGS. 6 and 7 are a plan view and right side view mainly showing the record button board, and FIG. is a partial right side view in play mode, Figure 9 is a right side view in record mode, Figure 10 is a plan view showing the operation of the accidental erasure prevention lever, and Figure 11 mainly shows the stop button plate and shift button plate. 12 is a left side view in stop mode, FIG. 13 is a left side view in play or record mode, and FIG. 14 is a left side view in stop mode showing eject operation.
In addition, in Fig. 12, Fig. 13, and Fig. 14,
The FF and REW release plates have been removed. Fig. 15 is a plan view of the flywheel incorporated in the tape recorder, Fig. 16 is a partial vertical sectional view of the flywheel, Figs. 17, 19, and 21. is the top view of the shift button plate at neutral, FF and REW, 1st
Figures 8, 20, and 22 are explanatory diagrams showing the driving force transmission path of the shift button plate in neutral, FF, and REW states, Figure 23 is a rear view, and Figure 24 is the 17th
25 and 26 are operation diagrams of the brake mechanism when the shift button plate is returned from FF to neutral, and FIG. 27 is a left side view in stop mode. FIG. 28 is a longitudinal sectional view of the reel mechanism. 10... Tape recorder, 14... Stop button, 16... Play button, 18... Record button, 2
2...Shift button, 32, 33...Reel axis, 34
...Pinch roller, 35...Magnetic head, 38...
...Stop button board, 39...Play button board, 40...
Record button plate, 41...Shift button plate, 42...Eject plate, 43...Eject lever, 46...
...First play button plate, 47...Second play button plate, 50...Brake mechanism, 51...Brake shoe, 100...Pinch roller mechanism, 101...
Pinch roller support plate, 102, 103... Guide, 104... First support plate, 105... Second support plate, 106... Plant pin, 107... Torsion spring, 108... Capstan shaft.

Claims (1)

[Scope of Claims] 1. A head support on which a magnetic head is mounted and is movable in a straight line between a non-contact position where the magnetic head is separated from the magnetic tape and a contact position where the magnetic head is in contact with the magnetic tape. The member: rotatably supports the pinch roller, is attached to the head support member so as to be movable relative to the head support member along the movement trajectory of the head support member in the direction of movement of the head support member, and is attached to the non-contact member. a pinch roller support member that separates the pinch roller from the magnetic tape at the position and brings the pinch roller into contact with the magnetic tape at the contact position; and a pinch roller support member that moves the pinch roller support member relative to the head support member in a direction toward the contact position. a biasing means for biasing; and the mounting position of the pinch roller with respect to the pinch roller support member is arranged approximately on the movement trajectory of the mounting position of the pinch roller support member with respect to the head support member in the moving direction of the head support member. A pinch roller mechanism for a tape recorder characterized by: