JPS606032B2 - Cassette ejection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to, for example, a cassette type tape recorder or VTR.
A cassette ejecting device that is most suitable for application to a recording/reproducing device using a cassette containing a recording medium such as
In particular, a cassette ejecting member is reciprocatably attached to a cassette holder for mounting and ejecting the inserted cassette from the cassette device position, and when the cassette is mounted, the cassette ejecting member is pressed by the cassette inserted into the cassette holder. The cassette ejecting member is then moved back from the backward movement position to the forward movement position against the spring, and when the cassette is ejected, the cassette ejection member is moved back from the forward movement position to the forward movement position by the restoring force of the spring. The present invention relates to a cassette ejecting device configured to eject a cassette to a predetermined position outside a cassette holder using this cassette ejecting member.

Conventionally, this kind of cassette ejecting device usually presses a leaf spring or the like against the side of the cassette being ejected to the outside of the cassette holder to apply a brake on the cassette, thereby ensuring that the cassette is completely removed from the cassette holder. We are working hard to ensure that it does not jump out. However, the braking force of the cassette due to the leaf spring etc. is a very unstable force with large variations, and moreover, the cassette ejecting force is due to the restoring force of the cassette ejecting spring that ejects the cassette out of the cassette holder via the cassette ejecting member. It was set regardless of the Therefore, conventionally,
If it is extremely difficult to set the brake force to a stable value that is appropriate and consistent with the cassette ejection force, and the braking force is too strong for the cassette ejection force, the cassette will be removed from the cassette holder. If the amount of cassette ejection is insufficient and the braking force is too weak relative to the cassette ejection force, the cassette may easily eject completely out of the cassette holder, causing a major defect in which the amount of ejection of the cassette is difficult to maintain. there were. It was also very difficult to adjust the braking force. The present invention was invented to correct the above-mentioned defects, and it is an object of the present invention to provide a cassette ejecting device that can always accurately eject a cassette to a predetermined position outside the cassette holder. .

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

Note that this tape recorder uses an ordinary compact cassette. First, the cassette loading (cassette loading/unloading device) device 49 will be explained.

(See Figures IA to 8) 50' is a conventionally known compact cassette (hereinafter simply referred to as a cassette).

Reference numerals 51 and 52 designate mechanical boards stacked in two layers, 53 a cassette holder, 54 a holder support, and 55 a head board.

First, the head substrate 55 is layered on the upper mechanical substrate 51, and is configured to be able to reciprocate in the left-right direction as shown in FIG. 5A by mutually being guided by long holes, guide pins, etc. There is. A reproducing head 57 is attached to the left end layer of the head substrate 55 in FIG. 5A. Also, a pinch loaf 5 is provided on one side of the playback head 57.
8 is placed. The pinch roller 58 is configured to be freely rotatable around a fulcrum shaft 60 fixed on the upper mechanical board 51 via a pinch lever 59. Note that the pinch roller lever 59 is biased to rotate clockwise in FIG. IB by a spring (tension spring) 61'; It is configured to be regulated by a board 55.
Further, the head substrate 55 is biased to slide rightward in FIG. 5A. The head board 55 is configured to be locked by a head board locking lever 62 in the retreated position shown by the solid line in FIG. That is, as clearly shown in FIG. 8, the head board lock lever 62 is rotatably supported on the upper mechanical board 51 at a pupil on one side of the head board 65 about a fulcrum pivot 63. A spring (tension spring) 641 is therefore biased clockwise in FIG. A locking pawl 65 is integrally formed on one side of the tip 62a side of the head substrate locking lever 62, and this locking pawl 65 engages with a locked portion 66 formed at one end of the head substrate 55. It is configured to engage and lock the head substrate 55. On the other hand, on the upper mechanical board 51, a cassette mounting position 71 is provided on the right side in FIG. 5A relative to the reproducing head 57 and pinch roller 58.

That is, as clearly shown in FIG.
1 is provided with a pair of reels 72 and 73 spaced apart from each other in the left-right direction as shown in FIG. 4A, and a capstan 74 is provided at a position on the left side in FIG. 5A. 75 again
76 is a pair of cassette positioning pins that also serves to regulate the height of the cassette. 76 is a pair of cassette height regulating pins.
The cassette holder 53 is located at the cassette mounting position 71.
It is located at the top of the , and is configured to be movable vertically at this position.

As clearly shown in FIGS. 4A and 5A, the cassette holder 53 has a U-shaped cross section with upper and lower plates 78, 79 and side plates 80 in a sideways open state. The cassette holder 53 is provided with a cassette insertion port 81 at the right end in FIG. 4A, and a gate 82 is formed on the left end surface in FIG. 5A, which is completely opened along its longitudinal direction. The cassette 50 has a front opening 5
The cassette holder 53 is placed in a so-called horizontal state with the side 0a facing left in FIG. 5A, and inserted into the cassette insertion slot 81 from one end in the longitudinal direction as shown in FIG. 4A. Moreover, it is configured to be inserted horizontally from the surface direction, or vice versa. As clearly shown in FIGS. IA and IB, the holder support 54 is composed of a horizontal plate-like member,
A pair of left and right projecting pieces 84a and 84b are bent vertically at one end 54a.

On the other hand, a side plate 85 is vertically provided at the right end of the lower mechanical board 52 in FIG. 5A and is integrally bent therefrom. Further, a support plate 86 facing the side plate 85 is fixed onto the upper mechanical board 51. The holder support body 54 is pivotally supported by the side plate 85 and the support plate 86 at the pair of projections 84a and 84b by a pair of fulcrum pins 87a and 87b coaxially arranged in the vertical direction. . The centers of the fulcrum pins 87a and 87b are horizontal and perpendicular to the direction in which the cassette 50 is inserted into the cassette holder 59.
Further, the cassette holder 53 is connected to the holder support 5.
It is arranged below the pond edge 54b of No. 4. The other end 54b of the holder support 54 is rotatably supported by a hinge 88 at a substantially intermediate position in the longitudinal direction of the upper plate 78 of the cassette holder 63. Note that the hinge pin 89 of this hinge 88 is in a dowel-centered state parallel to the fulcrum pins 87a and 87b. On the other hand, as shown in FIG. 3, a slide plate 9 is provided on the outer surface of the side plate 80 of the cassette holder 53.
1 is installed.

The slide plate 91 is mutually guided by elongated holes and guide pins between the side plate 8Q and is configured to be slidable in the left-right direction in FIG. 6A along the side plate 8. A slide pin 92 is fixed at right angles to the inside of the left end of this slide plate 91 in FIG. 4A.
The slide pin 92 is inserted into the cassette holder 53 through a long hole 93 formed in the side plate 80'. Further, another slide pin 94 is fixed to the outside of this slide plate 91 at a right angle. Furthermore, two slide plates 96 and 97 are provided on both the inner and outer sides of the side plate 85.
are installed on top of each other. Both slide plates 9
6 and 97 are mutually guided by elongated holes, guide pins, etc. between the side plates 85, and are configured to be slidable in the left and right direction as shown in FIG. 6A. Note that both these slide plates 96, 9
7 is connected to the sixth by springs (tension springs) 98 and 99, respectively.
In figure A, it is energized by sliding to the left. A guide groove 100 is formed in the side plate 85 at its right end in FIG. 6A. This guide groove 100 is formed into a groove bent at right angles by a horizontal groove 101 and a vertical groove 102 hanging down from the right end in FIG. 6A. Further, a vertical guide groove 1 is formed in a part of the inner slide plate 96.
03 is formed. The slide pin 94 passes through both the guide grooves 103 and 100 and projects further outward from the outer slide plate 97. Note that this slide pin 94 is configured to be able to slide vertically with respect to one guide groove 103, and with respect to the other guide groove 10.
0, it is configured to be slidable horizontally along a horizontal groove 101 and vertically along a vertical groove 102. On the other hand, the IA of the holder support 54
A side piece 104 is bent vertically at the right end in the figure.

A guide pin 105 is fixed at right angles to the inside of the left end of this side piece 104 in FIG. Also, both the fulcrum pins 87a, 87b
A spring 106 is attached to a position near the fulcrum pin 87b on the right side in FIG. 5A via a fulcrum pin 87b'. Note that this spring 106' is composed of a wound spring, and is wound around the fulcrum pin 87b', and one end 106a thereof extends downward from the fulcrum pin 87b' and is a part of the holder support 54. Spring receiver 10 integrally molded into
7 from the right side in FIG. 6A, and the other end 1060 extends substantially horizontally from the fulcrum pin 87b' to the left side in FIG. 6A and is locked to a part of the side piece 104. Further, one end 106a of the spring 106 is connected to a slit 109 of a spring receiver 108 integrally formed in a part of the slide plate 97.
In Figure 6A, it is in a state where it enters from the right side. Further, the slide pin 97 is provided on the outer slide plate 97.
and 2 facing the lower part of the guide pin 05, respectively.
Cam tabs 11 and 112 are integrally molded at the locations. Note that the upper end surfaces 111a of these cam pieces 111 and 112
, 111b are formed on horizontal surfaces substantially flush with the lower edge surface 101a of the horizontal groove 101 and the upper end surface 96a of the slide plate 96. Note that both of these cam pieces 111,1
In FIG. 6A of FIG. 12, slopes 111b and i12b, which are inclined at approximately 45 degrees, are formed on the left side. Further, a lock portion 113 for the guide pin 105 is provided at the left end portion of the inner slide plate 96 in FIG. 6A. This locking portion 113 is configured as a step edge cut downward in an arc shape from the upper end surface 96a, and the sliding plate 9
6 is formed into an arcuate surface that is approximately equal to the radius of rotation of the guide pin 105 relative to the fulcrum pin 87b when the guide pin 105 is slid to the right in FIG. 6A. Further, a lock lever 116 is attached to the inside of this slide plate 96. This lock lever turtle 6 is supported by a fulcrum pin 117 at approximately the center in its longitudinal direction so that it can be rotated freely.
tension spring) No. 118? In figure A, it is rotated clockwise. A lock pin 19 is fixed at right angles to the inside of the left end of the side plate 85 in FIG. It is configured so that the position is controlled by being supported by the side. Also this end 11
A locking portion 120 for the locking pin 119 is provided on a portion of the upper end surface of 6a. Furthermore, a lock pin turtle 2 is installed inside the right end of the outer slide plate 97 in FIG. 7A.
1 is fixed at a right angle. This locking pin is inserted through a long hole 122 formed in the side plate 85 and protrudes inside the slide plate 96. The other end of the lock lever 116 has the lock pin 1211.
A corresponding lock pawl 123 is integrally molded. Note that this lock claw turtle 23 has a recess 123a and a slope 123b.
is formed. In addition, 124 in the drawing is a lift regulating plate for the cassette holder 53.
5 or integrally formed with this side plate 86,
An upper plate 78 of the cassette insertion end of the cassette holder 53 is formed by a protruding piece 24a bent at its upper end.
It is designed to suppress. Also, Figure IB and 2
As clearly illustrated in Figure B, a protection device 126 for the reproducing head 57 is provided around the reproducing head 57.

This head protection device 126 includes a pair of pins 1 vertically fixed on the head substrate 55 on both sides of the reproducing head 57.
27, a horizontal plate 128 fixed between the upper ends of both pins 127, and a guide roller 129 pivoted to a protrusion 128a bent downward from one end of the horizontal plate 128.
It is made up of. On the other hand, a pair of protrusions 130a and 130b bent downward from the upper plate 78 are formed on the side wall of the cassette holder 53 on the side of the entrance 82. These protruding pieces 130a and turtle 30b are arranged so that the cassette 50 inserted into the cassette holder 53 is opened on the side.
82 to 5A to prevent it from jumping out to the left.
Note that one protrusion 3Qa is formed at a position facing the guide roller 1298. Next, the loading and ejecting operations of the cassette 50 to the cassette mounting position 71 will be explained based on the structure described above.

First, before the loading of the cassette is started, the cassette holder 53 is moved back to the raised position shown in FIG. 4A, and the slide pin 92 is also moved back to the return position shown by the chain line in FIG. 4A.

Furthermore, the head substrate 55 has also been moved to the retracted position shown in FIG. 5A. First, the operation during power loading of the cassette 5Q will be explained.

First, with the front entrance 58a of the cassette 58 facing left as shown in Fig. 5A, insert this cassette 50 from its longitudinal direction into the cassette insertion slot 8M as shown in Fig. 4A, and then press the cassette 5Q by hand to insert the cassette 50 into the cassette insertion slot 8M. It is inserted horizontally into the holder 53 toward the left as shown in FIG. 4A.

Then, the tip of the cassette 50 will eventually come into contact with the slide pin 92, and with the subsequent insertion of the cassette, the slide pin 92 will also push the cassette 50 and slide it from the position shown by the chain line to the position shown by the solid line in FIG. 4A. Meanwhile, during this time, the slide plate 96 is also slid to the right in FIG. 6A against the spring 9 via the slide pin 94 of the slide plate 91, and during this time the spring 981 is charged with a cassette ejection force, which will be described later. And both slide pins g2,9
4 reaches the position indicated by the solid line in FIGS. 4A and 6A, the manual cassette insertion operation is completed. Due to the sliding of the slide plate 96 during the manual insertion of the cassette, the lock lever 1 6 is also slid to the left in FIG. 7A, and is moved from the position shown by the chain line in FIG. TA as shown by the dotted line. At the moment when the manual cassette insertion is completed, the lock lever 116 is rotated clockwise by the spring 118 as shown in FIG. 7A.
As shown by the solid line in FIG. 7A, the lock portion 120 is connected to the lock pin 1.
Locked to 19. Note that the locking of the slide plate 96 at this time is a temporary fixation against the lock caused by the guide pin 105 falling into the lock portion 113. However, even if the user releases the cassette 50 after this, the cassette 505 will remain in the inserted position. When inserting the cassette by hand, the slide pin 94 is slid inside the horizontal groove 101 to the position shown in FIG. Although it comes off the green surface 101a and reaches the upper end of the vertical groove 102, the cam piece 11 is expected here, so this slide pin 94 moves from the lower green surface 101a of the horizontal groove 101 to the cam piece 11. 111 onto the upper end surface turtle 11a, the vertical groove 102
I can't bring myself to fall inward.

Similarly, when the slide plate 96 is slid to the position shown in FIG. 6A, the lock portion 113 is slid against the guide pin 05, and the guide pin 105 is removed from the upper end surface 96a of the slide plate 96. Lock part 11
This means that the cam piece 112 has been moved relatively to the position of 3, but since the cam piece 112 is expected to be located here, "this guide pin 1
05 is the upper end surface 1 12 of the cam piece 112 from the upper end surface 96a.
a, but does not fall into the lock part 113. Therefore, even after the manual insertion of the cassette is completed, the cassette holder 53 is still held in the raised position. However, when the cassette is inserted by the manual pusher 1, the spring 106 for driving the cassette 50 downward is not driven in any way, and the spring 98 is simply charged with the cassette ejecting force, so the load is applied when the cassette is inserted. is very small.

Therefore, the cassette 50 can be inserted by pressing it very lightly by hand. On the other hand, when the manual cassette insertion is completed and the slide plate 96 reaches the position shown in FIG. Start rotating.

Then, the slide plate 97 is slid to the right in FIG. 68 against the spring 99 by a power loading device to be described later that utilizes the rotational force of this motor. As the slide plate 97 slides, the spring receiver 108 starts pressing one end IQ6a of the spring 106 in the right direction in FIG. 6B.

Then, for the first time, the spring 106 is rotated in the opposite direction in FIG. 6A against the anti-reverse force, and the other side 106
b starts pressing the holder support 54 downward. Therefore, until now both cam pieces 111 and the upper end surface 11 of the oven 12 have been damaged by their own weight.
The slide pin 94 and guide pin 105 that were placed on the upper end surfaces 111a and 112a
It begins to be actively pushed upwards. Furthermore, slide plate 9
7, the cam piece 111" is connected to the 6th B with respect to the slide pin 94 and the guide pin 105.
Move to the right in the diagram. At the same time, the pressing force of one end 106a of the spring 106 toward the right in FIG. 68 progresses, and the downward pressing force of the cassette holder 53 by the other end 106b gradually increases. Also, as the slide plate 97 slides, the slide pin 94 and the guide pin will eventually move! 05 is the slope 111b of both cam pieces 111, 112,
It will slide down the stove 12b.

When the slide plate 97 reaches the position shown in FIG.
The guide pin 1051 also locks the lock part 113.
will become depressed. However, both these pins 97,1
The above-mentioned falling action of 05 is performed by the rotation of the holder support 54, and at this time the holder 54 is moved by the spring 1.
06, both fulcrum pins 87a, 87b are
As shown in the figure, it will be rotated clockwise, that is, downward.

Then, due to the rotation of the holder support 54, the cassette holder 53 is moved substantially horizontally downward as shown in FIG. 4B, and the cassette 50 inserted into this cassette holder 53 as described above is moved substantially horizontally downward. As a result, the cassette can be smoothly mounted at the cassette mounting position 71. That is, the cassette holder 53 is pivotally supported at its longitudinally intermediate portion by a hinge 88 to the lower part of the other end 54b of the holder support 54, and the cassette 50 is inserted into the cassette holder 53, that is, the fourth A In the state shown in the figure, the weight is balanced around the hinge 88 to maintain a substantially horizontal state.

Therefore, in this state, when the holder support 54 is rotated downward as described above and the other end 54b is lowered, the cassette holder 53 is also moved downward in substantially parallel while maintaining a substantially horizontal state. The internal cassette 50 is also moved downward in a substantially parallel manner while maintaining a substantially horizontal state, to the cassette mounting position 71 as shown in FIG. 4B.
mounted horizontally. At this time, the cassette holder 53 is placed at the 4th A with the hinge 88 as the center relative to the holder support 54.
As shown in the figure, the cassette 50 is inserted into the reel shafts 72, 73, capstan 74, cassette positioning pin 75, etc. at the cassette mounting position 71 because it has a degree of freedom that allows it to rotate freely in the rising direction and its return direction. When the cassette holder 53 is rotated freely in the counterclockwise direction and the return direction, the cassette 50 is moved down so that the reel shafts 72 and 73 are also connected to the capstan 74, the cassette positioning pin 75, etc. It is installed very smoothly and without any difficulty.

In this cassette mounted state, the cassette 5 is horizontally positioned above the cassette height regulating pin 76 as shown in FIG. 4B. On the other hand, when the cassette is installed, the guide pin turtle 05 is inserted into the lock portion 113 as described above.
(see FIG. 7B), the inner slide plate 96 is locked at the slide position described above.

As a result of the above, the slide plate 96 is finally locked against the side plate 85 while the cassette ejecting force is charged in the spring 98. Also, the outer slide plate 97 is the 6th B.
At the moment when the position shown in the figure is reached, as shown in Fig. 7B, the lock pin 2 tortoise touches the lock pawl wing 23 of the lock lever li6, and by the cam action of the slope tortoise 23M, this lock lever tortoise 16 The slide plate 97 enters the recess 123a while being rotated counterclockwise as shown by the chain line in FIG. Like the slide plate 96, it is locked at the position shown in FIG. 6B.On the other hand, when the cassette is installed, just before the cassette installation is completed, the slide plate 97 is moved to the right end in FIG. 6A as shown in FIG. Push the tip 62a of the head board lock lever mount 2 using the notch 32 formed therein.

Then, the lock lever 82 is rotated counterclockwise against the spring 64 as shown by the chain line in FIG. It comes off like this. As a result, the head substrate 65 is slid to the right in FIG. 5B by a spring to be described later, and the playback head 57 and pinch roller 58 are automatically inserted into the front opening 50a of the cassette 50 as shown in FIG. 5B. Become. However, at this time, when the head substrate 55 moves forward slightly, the guide roller 29 comes into contact with the protrusion 130a of the cassette holder 53.

At the moment of this contact, insertion of the reproducing head 57 and the pinch roller 58 into the cassette 50 is temporarily restricted. On the other hand, the cassette holder 53 is being lowered as described above even at this moment. Then, at the moment when the cassette 50 is completely installed in the cassette installation position 71 as described above,
The guide roller 129 rides on the upper plate 78 of the cassette holder 53 from the protruding piece 130a. As a result, the above-mentioned restrictions on the playback head 57 and the pinch roller 58 are released, and the playback head 57 and the pinch roller 58 are correctly inserted into the front opening 50a of the cassette 50 as shown in FIG. The pinch roller 68 will be pressed against the capstan 74 at the same time as the inner tape (not shown) is contacted.
That is, when the cassette is installed, the head protection device 126
'Well, only after the cassette 60 is correctly installed at the cassette installation position TI, the cassette 50 is placed in the playback head 5.
7 and the pinch roller 58 are inserted into the cassette 58 correctly.
Also, the pinch roller 58 is reliably prevented from colliding with the front of the cassette 50, the cassette holder 53, etc. and causing damage to them.

With the above, a series of cassette loading operations is completed. At the moment of completion, the tape recorder enters the playback mode, and the signal on the tape in the cassette 68 is played back by the playback head 57. In addition, in the state where the cassette is completely installed, the guide roller turtle 29 presses the upper plate T8 of the cassette holder 53, and both pins 1
27 comes into contact with the front surface of the cassette store 8 and presses it to the right in FIG.

Therefore, in this state, the cassette 5Q' is completely prevented from moving vertically and horizontally, and is extremely stably fixed at the cassette mounting position 71 without any unexpected disturbance due to vibrations, etc. become. Next, the operation during manual loading of the cassette 50 will be described.

In addition, when implementing this manual loading device,
The lock pin 119 and the lock portion 120 of the lock lever 1 16 are omitted, and the lock pawl 123 of the lever 116 is previously locked to the lock pin 121 of the outer slide plate 97 before the cassette 50 starts to be installed. Configure the state.

On the other hand, during manual loading, the cassette 50 can be inserted into the cassette holder 53 in exactly the same manner as during power loading described above.

That is, when the cassette 50 is manually inserted into the cassette holder 53 as described above in the above state, the cassette 5
0 pushes the slide pin 92, and the slide plate 91
, the inner slide plate 96 via the slide pin 94
is slid to the right in FIG. 6A.

However, at this time, the lock claw 12 of the lock lever 116
3 hooks the lock pin 121 and pulls it, and at this time, the outer slide plate 97 is simultaneously slid to the right in FIG. 6A. As a result, the slide pin 94 is slid in the horizontal groove 101 of the side plate 85 to the right in FIG. At the same time, both cam pieces 111 and 112 are also slid to the right in FIG. 6A. When the slide pin 94 reaches the upper end of the vertical groove 102 and the guide pin 105 moves onto the lock portion 113 as shown in FIG. 6A, both cam pieces 111 and 112 have reached the position shown in FIG. Instantly, the holder support 54 is rotated downward by the spring 106 as described above, and the cassette 50 is mounted at the cassette mounting position 71.
Next, the operation when ejecting the cassette 50 will be described.

Although this cassette ejection is performed by an ejecting device which will be described later, here, the ejecting operation for the above-mentioned power loading device will be explained first.

First, the head substrate 55 is moved back from the forward position shown in FIG. 5B to the retreated position shown in FIG. 5A by the ejecting device, as will be described later, and the reproducing head 57 and pinch roller 58 are moved from the front opening 50a of the cassette 50 to the retracted position shown in FIG. 4A. It is extracted again like this.

After this, the lock lever 1 is in the state shown by the solid line in Fig. 7B.
16 is rotated counterclockwise against the spring 118 as shown by the chain line in FIG.
removed from At this time, the lock portion 120 of the lock lever 116 is also closed. It is removed from the lock pin 119. The lock lever 116 is maintained in the unlocked state until the slide plate 96 is moved back as described later. Note that at the moment the lock lever 116 is released, the outer slide lever 97 is first released.
is instantaneously slid back from the position shown in FIG. 6B to the position shown in FIG. 6A by a spring 99. As a result, the slide pin 94 and the guide pin 105 are moved by the cam action by the slopes 111b and 112b of both cam pieces 111 and 112.
is pushed up above the vertical groove 102 and the lock portion 113, and the slide plate 97 is moved back to the position shown in FIG. 6A.
5 is the upper end surface 111a, 112 of both cam pieces 111, 112
Reach above a. On the other hand, at this moment, one end 106 of the spring 106
Since the pressing force to the right is released in FIG. 6B of a, the one end 106a is moved back clockwise while pushing the slide plate 97 back to the left in FIG. 68 by the rebuttal force.
The entire spring 106 is connected to the 6A centering on the fulcrum pin 87b'.
It is rotated clockwise as shown in the figure.

As a result, the downward force on the holder support 54, which had been pressed by the one end 106b of the spring 106, is released. Therefore, at this time, the slide pin 94 and the guide pin 105 are pushed up very lightly by both cam pieces 111 and 112.

By this pushing up, the holder support 54 is rotated counterclockwise in FIG. 4A around both fulcrum pins 87a and 87b, and the cassette holder 53 is pulled up to the raised position as shown in FIG. 4A. As a result, the cassette 50 is lifted from the cassette mounting position 71 to the raised position shown by the solid line in FIG. 4A. At this time as well, the cassette holder 53 is pulled up while being freely rotated about the hinge 88 with respect to the holder support 54, and the cassette 50 is moved to the cassette mounting position 71 in the same way as when mounting the cassette described above. Reel ball 72, 73 "Capstan 7
4. The cassette can be pulled out from the cassette positioning pin 75 etc. easily and very smoothly.

At this time, due to the return movement of the slide plate 97 mentioned above, the lock lever 62 is rotated clockwise by the spring 64 and returned to the position shown by the solid line as shown in FIG.

As a result, the locking claw 65 locks into the locked portion 6 of the head substrate 55.
6 to lock the head substrate 55 in the retracted position shown in FIG. 5A. The upper plate 78 of the cassette holder 53 that has been raised as described above comes into contact with the protrusion 124a of the elevation regulating plate 124, and its elevated position is regulated.

At the next moment when the guide pin 105 is released above the lock portion 113, the inner slide plate 96 is momentarily slid to the left in FIG. 6A by the spring 98 and is moved back. As a result, the slide plate 91 is slid to the left in FIG. 6A by the slide plate 96 via the slide pin 94, and instantaneously moves back. At this time, the slide pin 94 is inserted into the horizontal groove 1 from the upper end surface 111a of the cam piece 111.
01 and is moved back to the left end position of the horizontal groove 101 in FIG.
2 to the upper end surface 96a of the slide plate 96.
is moved relative to the top. On the other hand, slide plate 91 at this time
Due to the above-mentioned instantaneous return movement, the slide pin 92 pushes the cassette 50 out of the cassette insertion opening 81 of the cassette holder 53 as shown by the chain line in FIG. 4A, thus completing a series of cassette ejection operations. becomes. In this case, in the above-mentioned manual loading device, when the slide plate 96 is moved back as shown by the chain line in FIG. However, in this power loading device, the above-mentioned engagement is not performed.

Further, the cassette holder 53 is provided with a cassette brake device 141 that stops the cassette 50 pushed out from the cassette insertion port 81 at a predetermined position during the ejection described above.

Therefore, this cassette brake device 141 will be explained next.

(See Figures 9 and 10) The cassette holder 53
A brake plate 142 is rotatably supported by a pivot pin 143 at the end of the side plate 80' on the side of the cassette insertion port 81.

This brake plate 142 is bent into an approximately L shape,
The upper side portion 142a has a substantially horizontal shape, and is slightly bent upward at the tip. Also, this brake plate 142
The lower side portion 142b extends vertically along the side plate 8. The upper side 142a is inserted into a notch 144 formed in the upper plate 78 of the cassette holder 53, and as the brake plate 142 rotates about the pivot pin 143, the upper side 142a swings up and down. It is configured to be attached to the upper surface of the cassette 50 located in the cassette holder 53 and to be detachable therefrom. On the other hand, as described above, a slide plate 91 is attached along the side plate 80' of the cassette holder 53, which is slidable in the left-right direction as shown in FIG.

The tip 145 of the slide plate 91 is configured to be able to come into contact with the lower end of the lower side portion 142b of the brake plate 142 from the right side in FIG. 10. Furthermore, this slide plate 91
As mentioned above, is biased to slide to the left in FIG. 10 by a spring 98 via a slide pin 94 and a slide plate 96. Next, the cassette brake device 141 described above
The braking operation of the cassette 50 will be explained below. First, when the cassette 50 is not yet inserted into the cassette holder 53, the tip 145 of the slider 91 is pressed against the spring 98.
Due to the force, the brake plate 142 is brought into contact with the lower end of the lower side portion 142b. In this state, as described above, when the cassette 60 is inserted into the cassette holder 53 and the slide pin 92 is pushed to the right in FIG. The tip 145 of the brake plate 1 is slid to the right in the figure.
42, the brake plate 142
The brake is released. Therefore, the cassette can be inserted very easily from now on. On the other hand, as mentioned above, when ejecting a cassette, after the cassette holder 53 is pushed up to the raised position shown in FIG.
1 is momentarily slid to the left in FIG. 10 by the cassette ejecting force of the spring 98, and the cassette 50 in the cassette holder 53 is moved from the cassette insertion opening 81 to the left in FIG. 9 by the slide pin 92. being pushed out.

However, until the tip 145 of the slider 91 comes into contact with the lower side 142b of the brake plate 142, the brake by the brake plate 142 is still in the open state.

Therefore, at this moment, the cassette 50 is pushed out very smoothly and reliably pushed out to a predetermined position. At the final point of this cassette extrusion, the slider 91
The tip 145 of the brake plate 142 contacts the lower end of the lower side portion 142b of the brake plate 142 as shown by the chain line in FIG.

At this moment, the brake plate 142 is rotated clockwise in FIG.
The tip of a is pressed against the upper surface of the cassette 50 which is in the middle of being pushed out, and an emergency brake is applied to this cassette 5. As a result, the cassette 50' is extremely reliably stopped at a predetermined position where the cassette 50' is pushed out to a predetermined length from the cassette insertion opening 81. Moreover, this cassette brake device 1
According to No. 41, the cassette 501 is braked by the brake plate 142 using the cassette ejecting force generated by the spring 98, so that the cassette 50 is suddenly braked with a braking force commensurate with the strength of the cassette ejecting force. Can be hung.

That is, when the cassette eject force is strong, the cassette 5 will be ejected from the cassette insertion slot 81 with great force, but at this time, the braking force will also be strong, so the cassette 5
0'A strong sudden brake can be applied to reliably prevent the vehicle from jumping out. Furthermore, when the cassette ejection force is weak, the cassette 50 tends to be pushed out insufficiently from the cassette insertion port 81, but at this time, the braking force is also weak, so the cassette 50 can be pushed out reliably to a predetermined position. . Therefore, according to this cassette brake device 141, when ejecting a cassette, the ejecting amount of the cassette 50 may be insufficient because the brake is too effective, or the cassette 50 may not be pushed into the cassette holder 53 due to insufficient braking.
There is no chance of it jumping out,
The cassette 50 can be pushed out to the required size from the cassette insertion port 81 very accurately and stopped, and the operation is very reliable.

Further, it exhibits advantages such as being able to adjust the braking force very easily. In implementing this device, a more effective braking operation can be achieved by pasting a material such as rubber or leather having an appropriate coefficient of friction on the lower surface of the upper side 142a of the brake plate 142. There is also a possibility. Next, the tape running drive section 147 of this tape recorder will be explained.

(See Figures 11 and 12) A dual capstan system is adopted here so that an auto-reverse device, which will be described later, can be implemented, but one of the pair of capstans is used here as a mere transmission ball. It is being That is, 148 is a capstan used as the above-mentioned transmission shaft, and this capstan shaft 48 is connected to the above-mentioned tape running drive cabstan 7 with the playback head 57 in between.
It is provided in a position symmetrical to 4. Both of these capstans 74, 148 are rotatably supported by the upper mechanical board 61, and are thrust supported by the lower mechanical board 52. Further, both the reel shafts 72 and 73 are also rotatably supported by the upper mechanical board 51. 149, 16 Under the upper mechanical board 51, both capstans 74, 148
It is a flywheel that doubles as a pulley and is fixed to the lower end of the .

Further, the reel stands 51 and 162 are attached to the lower ends of the two reel shafts 72 and 73 under the upper mechanical board 61,
These reel stands 151 and 152 are connected to both reel shafts 7 through torque limiters (friction transmission mechanisms), respectively.
2, 73 to transmit rotational force. 1
53 are both reel stands i51, 152 under the upper mechanical board 51
This idler is provided between the flywheels 149 and 150 and is used for both FF and REW.

This idler 153 is configured in two stages, upper and lower. The upper stage 153a is configured to be attached to and separated from both the reel stands 161 and 152, and the lower stage 153b is configured to be attached to and separated from both the reel stands 161 and 152.
49, 15 so that they can be crimped and separated at will. Reference numeral 154 denotes a FWD idler provided below the upper mechanical board 51 between the boss 149a of the one flywheel 149 and the winding reel stand 152.

Reference numeral 156 denotes an end detection pulley, which is rotatably supported by a shaft 157 under the upper mechanical board 51.

On the other hand, a motor counterfeit stand 159 lowered one step is provided directly at the right end of the upper mechanical board 51 in FIG. are being sent to war.

The lower end of the motor shaft 161 of this motor shaft 60 has two
Even if the step pulley 162 is fixed, the upper step 162a of the two-step pulley 162 and both flywheel turtles 49,
A belt 163 is wound approximately in a P-shape between IS0 and IS0. In addition, the motor platform 159 has a fixed shaft with 6
4. Rotatably supported rotary shaft blade 65, fixed blade 16
6 are arranged and attached almost in a straight line. A pulley 167 and a gear 168, which are formed integrally with each other under the motor mounting table turtle 59, are rotatably supported on the shaft 164, and the pulley 167 and the two-stage pulley 16
The lower stage 162b of 2 is moved by a belt 169. Also, at the lower end of the rotating shaft 165 is a motor Sentaka stand 153.
Gears i70 and 171 of different sizes are fixed below the gears, and a gear 172 of a small diameter is fixed to the upper end of the gears on the motor platform 159. Further, at the upper end of the shaft 166, a large-diameter gear 173 and a pulley 174, which are formed integrally with each other on the motor platform 159, are rotatably supported.
Further, a large toothless gear 175 is rotatably supported at its lower end under the motor platform turtle 59. Then, gear 168 is engaged with gear IT, gear 172 is engaged with gear 173, and gear 178 is engaged with gear 1.
75 and is configured to be able to engage and disengage freely. Further, the pulley blade 74 and the end detection pulley 156 are connected to the belt 17.
It is linked by 6. According to the tape running drive system 147 configured as described above, when the power switch described later is turned on and the motor 160 starts rotating, the rotational force of the motor shaft 161 is transferred to the two-stage pulley 162, the belt 163,
The power is transmitted to both capstans 74, 148 via flywheels 149, 150, and these two capstans 4
, 148 are rotated in opposite directions as shown by arrows in FIG. At this time, both flywheels 149,1
The so-called anti-rolling drive is achieved by rotating the rollers 50 in mutually opposite directions. On the other hand, the rotational force of the motor shaft 161 is generated by the two-stage booley 162, the belt 169, and the gears 168, 171.
is transmitted to the rotating shaft 165 via the rotating shaft 165.
is rotated in the direction of the arrow in FIG. Furthermore, the rotational force of this rotating shaft 165 is applied to gears 172, 173 and pulley 1.
74, end detection pulley 156 via belt 176
is transmitted to the twelfth end detection pulley 156.
Rotate in the direction of the arrow in the figure. However, playback mode (F
In the WD mode), the pinch roller 58 is pressed against the capstan 74 as shown by the chain line in FIG.
D-idler! 54 is the boss 14 of the flywheel 149
It is crimped between the winding reel 9a and the winding reel stand 152 as shown in the line in Figure 12.

As a result, the rotational force of the flywheel 149 is transmitted to the take-up roll stand 152, and the take-up roll wheel 73 is driven to rotate at low speed in the direction of the arrow in FIG. 12 via the take-up roll stand 152. , the tape is run at a constant speed as conventionally known. In addition, in the fast forward mode (FF mode), the dual-purpose idler 153 connects the flywheel 149 and the winding reel stand 1.
52 as shown by the chain line in FIG.

As a result, the rotational force of the flywheel 149 is transmitted to the take-up roll stand 152 at high speed, and the take-up roll shaft 73 is driven to rotate at high speed in the direction of the arrow in FIG. 12 via this take-up roll stand 152. Then, the tape is fast-forwarded as is known in the art. Furthermore, in the rewind mode (REW mode), a dual-purpose idler 153 is pressed between the flywheel 150 and the supply reel stand 151 as shown by the chain line in FIG.

As a result, the rotational force of the flywheel 150 is transmitted at high speed to the supply reel stand 1511.
The supply reel shaft 72 is driven to rotate at high speed in the direction of the arrow in FIG. Next, the power loading device 180 used in the cassette loading device 49 described above will be explained.
(See FIGS. 13A to 15) This power loading device 18 is attached to the toothless gear portion 75, and is associated with both the slide plates 96 and 97 described above.

First, a portion of the toothless gear 175 is provided with a toothless portion 181. Further, an eccentric cam 182 is integrally formed on the lower surface of the partially toothed gear 175. Furthermore, a pin I83 is integrally formed on the upper surface of the toothless gear 175. And below this toothless gear 175 is the above-mentioned eccentric
A loading lever 186 is located at the same height as the cam 182.
are arranged. This loading lever 186 has one end 186a rotatably supported by a fulcrum pin 187 under the motor platform calendar 159, and the other end 186b.
A roller 188 is pivotally mounted thereon. Further, this loading lever 186 is bent at its intermediate portion 86c, and is biased to rotate clockwise in FIG. 13A around a fulcrum pin 187 by a spring (tension spring) 19. The intermediate portion 186c is configured to be firmly attached to the circumferential surface of the eccentric cam 182. Further, the roller 188 is provided with a bent piece 191 that is integrally bent at the right end of the outer slide plate 97 in FIG. 6A, so that it can be applied from the left side in FIG. 13. Further, a switch operating lever 193 is provided on the motor platform 159, and this switch operating lever 153 is rotatably supported on the motor platform 159 by a fulcrum pin 194. At the tip 193a of this switch operating lever 193, there is a bent piece 195 integrally bent to the right end of the inner slide plate 96 in FIG. 6A.
It is configured so that it can be supported from the left side in the figure. Further, a pair of stopper pieces 196a and 196b for selectively engaging the pin 183 are provided approximately in the middle of the switch operating lever 193 in the longitudinal direction. These two stopper pieces 196a, 196b are bent downward to form a notch 197 formed in the motor platform 159.
The switch actuating lever 193 is pushed clockwise in FIG. 13A by a spring (tension spring) 199. However, since the stopper piece 196b comes into contact with one side edge of the notch 197, the first
It is stopped at the position indicated by the solid line in Figure 3A. Note that 202 is a power switch, and this power switch 202 is attached to the end of the motor platform 159.

This power switch 202 is constituted by a leaf switch, and a pair of contacts 204a, 204b are fixed to the inside of the tips of a pair of leaf springs 203a, 203b in a state in which they face each other. The tip 193a of the switch operating lever 193 is connected to the power switch 202.
The leaf spring 203a is configured to come into contact with and press the leaf spring 203a from the left side in FIG. 13A. Here, the power loading device 18 configured as above
The power loading operation of the 0' cassette 50 will be explained.

First, before the above-mentioned cassette loading starts, the motor 160' is stopped.

Further, as shown by the solid line in FIG. 13-A, the toothless gear 175 faces the gear 170 by its toothless portion 181, and is not meshed with the gear 170. Furthermore, the switch operating lever 193 is stopped at the position shown by the solid line in FIG. 13A, and at this time, the pin 183 of the toothless gear 175 is supported by one stopper piece 196a of the switch operating lever 193. Furthermore, eccentric cam turtle 8 with toothless gear 175
2 is in the phase state indicated by the dotted line in FIG. 13A, and the intermediate portion 186c of the loading lever 186 is pressed against the eccentric cam 182 by the pressing force exerted by the spring 1901. Therefore, due to the pressing action of the loading lever 186 at this time, the toothless gear 175 is moved to the 13th gear via the eccentric cam 182.
In Fig. A, a slight rotational force is applied in the counterclockwise direction, but since the pin 183 is held against the stopper piece 196a as described above, the toothless gear 175 is rotated in the counterclockwise direction. rotation is stopped. Loading of the cassette 50 by the cassette loading device 49 described above is started in the above state.

First, as mentioned above, the cassette holder 5 is in the raised position.
When the cassette 50 is manually inserted into the cassette 3 and the slide plate 96 is slid to the position shown in FIG. 6A, the bent piece 195 is moved to the position shown by the chain line in FIG. 13A.

'At this time, the bent piece 195 is connected to the switch operating lever 193.
This switch operating lever 1 is placed in contact with the tip 193a of
93 is rotated counterclockwise against the spring 199 as shown by the chain line in FIG. 13A. At this time, the tip 193a comes into contact with the leaf spring 203a of the power switch 202 and presses it, so this leaf spring 203a
In Fig. 13A, both contacts 204a and 20 are shown as dashed lines.
4b is touched and the power switch 202 is turned on. When the power switch 2Q2 is turned on, the motor 160 starts rotating and the tape running drive system 147 described above starts driving.

When the mower turtle 60 starts rotating, the gear 178 starts rotating in the direction of the arrow in FIG. i2A via the rotating shaft 65 as described above. On the other hand, switch actuation lever angle 93
is rotated to the position indicated by the chain line in FIG.
Run to the right in the diagram.

Therefore, at this moment, the rotation stop of the partially toothed gear 75 is released. At this moment, the toothless gear 175 is slightly rotated counterclockwise as shown by the chain line in FIG. 13B by the rotational force caused by the pressing action of the loading lever 186 mentioned above. As a result, Z6 is engaged with the gear 170 by the toothless gear, and thereafter the toothless gear turtle 76 is rotationally driven in the counterclockwise direction by the toothless gear mechanism 7. And this toothless gyaa 1
75 starts rotating in the counterclockwise direction, the eccentric cam 182 rotates the middle part of the loading lever 6.
6c from the left side as shown in Figure 3B and gradually press it.
6 is gradually rotated counterclockwise around the fulcrum pin turtle 87 against the spring force 901. Then, the roller bar at the tip 186b of the loading lever 1 flea 8 eventually comes into contact with the bent piece 91 of the outer slide plate 7 from the left side in Fig. 13B. Then slide to the right as shown in Figure 6B mentioned above. However, the above-described lowering operation of the cassette holder 53 is performed from the slide of the slide plate g7, and the cassette 6 is moved to the cassette device position 71.
0 will be installed. In addition, toothless Gya turtle 7
When the rotation of the loading lever 1 crab 6 in the counterclockwise direction is almost completed when the rotation of the loading lever 1 crab 6 by the monkey heart cam 1 and 2 is completed, the loading lever 1 crab 6 rotates approximately half a turn.
Reach the position shown.

Immediately before this, the slide plate 99 reaches the position shown in FIG. 68 and is locked by the lock lever 116 described above. On the other hand, the toothless gear box 76 continues to be the 13th C.
In the figure, the loading lever 86 is rotated in the direction of the rebound indicator, but as the eccentric cam 182 rotates, the loading lever 86 is rotated.
is moved back clockwise in FIG. 13C by spring 190.

When the toothless gear 176 has rotated approximately once, the toothless portion 181 reaches the gear 178, and at this moment the meshing between the gear 78 and the toothless gear 175 is broken.

Also, at this time, the pin 183 comes into contact with the other stopper piece 196b of the switch operating lever i93, and the toothless gear IT
5 is stopped. With the above steps, a series of power loading operations is completed.

It should be noted that when the aforementioned cassette eject operation is carried out in the above-mentioned state and the slide plate 96 is moved back to the left in FIG.
3 is released, this switch operating lever 19
3 is in the return position indicated by the chain line in Fig. 13C by the spring 199;
That is, it is returned to the original position indicated by the solid line in FIG. 13A. As a result, the other stopper piece [96b] escapes to the left with respect to the pin force 83 as shown in Fig. 3C. On the other hand, even at this time, the loading lever 186 is pressed against the eccentric cam 182 by the spring 1901, so that at the above moment the toothless gear lever 75 is slightly rotated counterclockwise as shown in Fig. 13C.
The pin 196b is attached to one stopper piece 196a at the 13th A.
As shown in the figure, they come into contact and are stopped again at the original position. The loading lever 386 is also moved back to its original position as shown in FIGS. 3A. As the switch operating lever turtle 93 is returned as described above, the leaf spring 233a of the power switch 202 is moved back as shown by the solid line in FIG. 13A by its own spring force, and both contacts 204a and 284b are separated. "
This power switch 2Q2 is turned off.

As a result, the rotation of the motor turtle 60 is stopped, and the tape running drive system blade 47 described above is stopped.Next, the mode switching operation lever device 211 will be explained.(See Figures 18 to 9) First, As clearly shown in FIG. 6, the head substrate 5
5 is placed on the upper mechanical board 51, and is mutually guided between the upper mechanical board 5 and the upper mechanical board 5 by elongated holes and guide pins, etc., so that it can freely slide in the vertical direction as shown in FIG. There is.

A pin 212 is fixed to the lower surface of the head substrate 55 at approximately the center of the upper side in FIG. 16. This pin 282 is inserted through a long hole 213 formed in the upper mechanical board 51 and is suspended downward. On the other hand, the lower mechanical board 5
2, a conversion lever 214 is rotatably supported by a fulcrum pin 215 on the upper left layer in FIG. 18A. This conversion lever 214 has a substantially L-shape, with one end 214a extending rightward in FIG. 18A, and the other end 214b extending downward in FIG. 18A. and a groove 2 formed in the one end 214a.
The lower end of the pin 212 from the head substrate 55 is inserted into the pin 24 . Further, in FIG. 18A, a pin 216 is provided in the upper left layer, which is fixed between the upper and lower mechanical boards 51 and 52, and a spring 217 is attached to this pin 216. Note that this spring 217 is composed of a wound spring, and is wound around the pin 216, and one end 2 of the spring 217 is wound around the pin 216.
17a is a spring receiver 218 formed integrally with one end 214a of the conversion lever 210 from above in FIG. The receiver 219 is coming from the left side in FIG. 18A. Therefore, the head substrate 55 is biased to slide downward in FIG. 16, that is, to the right in FIG. 5A, by the spring 217 via the conversion lever 214 and pin 212.

Note that this head board 55 has both capstans 74,
A pair of openings 220, 221 are formed to escape from the opening 148, and a pair of cam surfaces 222, 223 are formed in a part of both these entrances 220, 221.

On the other hand, the FWD idler 154 has an idler core 225.
The idler lever 226 is rotatably supported at the tip of the idler lever 226. This idler lever 226 is connected to a pair of guide and support pins 2 fixed to the lower surface of the upper mechanical board 51.
27 and 228 through a pair of holes 229 and 230, and is slidably supported on the lower surface of the upper mechanical board 51. The idler lever 226 is biased to slide rightward in FIG. 16 by a spring (tension spring) 231. The upper end of the idler shaft 225 is connected to a pair of left and right holes 232a formed in the upper mechanical board 51 in FIG.
, 232b is inserted into one of the entrances 220 of the head substrate 55, and the one cam surface 222 is inserted by the spring force of the spring 231.
is being driven crazy. Further, a pair of left and right holes 233 and 234 are formed in the head substrate 55 at a position that is tilted toward the upper side in FIG. A projecting piece 235 that is integrally suspended downward from a portion of the pinch roller lever 59 is inserted into one of the holes 233. As described above, the pinch roller 59 is urged to rotate clockwise in FIG. 16 by the spring 61, so that the protrusion 235 is brought into contact with the lower edge of the hole 233 in FIG. On the other hand, as clearly shown in FIG. 18A, an operating lever 237 is provided on the upper part of the lower mechanical board 52 for switching between fast forward and rewind ejects. This operation lever 237' is arranged to be substantially orthogonal to the end 214b' of the conversion lever 214, and the knob 237a formed at the left end in FIG. 18A is connected to the lower mechanical board 52 in FIG. 18A. It extends a predetermined length in the left direction. First, a pin 238 is fixed to the bottom of the operation lever 237 at a position deviated to the left in FIG. It is inserted into the hole 239. Note that this guide hole 239 is approximately V-shaped, and the center portion is the 18th hole.
The FWD lock part 239a is recessed on the right side in Figure A, and the FWD lock part 239a has a vertically
From now on, the slopes 240a and 240b will be on the left side in Figure 18A.
A REW lock portion 239b and an FF lock portion 239c are formed so as to be gradually raised. Further, a horizontal groove 241 is formed approximately at the center of the operating lever 237 in the longitudinal direction. Furthermore, this horizontal groove 241
There is a horizontal groove 242 at a position tilted to the right in Fig. 18A.
A guide groove 244 is formed in the operating lever 237 and has a substantially inverted U-shape in which a circular arc groove 243 and a circular arc groove 243 are connected to each other. Note that a guide pin 245 fixed on the lower mechanical board 52 is loosely placed in the guide groove 244. Further, a lower end of a rotating pin 246 that is rotatably supported by the upper mechanical board 51 and hangs downward is engaged with the horizontal groove 241. As clearly shown in FIG. 17, this rotation pin 246 is rotatably supported by the upper mechanical board 51 by its upper end 246a, and its lower end is formed into an oval shape. The lower end oval part 246b is the horizontal groove 241.
Sonai has been. Note that the tip 23T of the operation lever 237
b, a pair of springs (tension springs) 247a, 247b are related to each other in a substantially V-shape, and these springs 247a,
247b maintains the operating lever 237 in a horizontal state in FIG. 18A, and is biased to slide leftward in FIG. 18A. This operating lever 237 is the 18th
When it is slid to the left at A, the guide pin 24
5 comes into contact with approximately the center of the circular arc hole 243 as shown by the solid line in FIG. 18A. In this state, the arcuate hole 243 assumes an arcuate state with the rotating pin 246 in the center. The dual-purpose idler 153 is located at the tip 26 of the idler lever 261.
1a is rotatably supported by an idler ball 262.

This idler lever 261 is provided at the lower part of the upper mechanical board 51, and is engaged with a support pin 263 fixed under the upper mechanical board 51 through an elliptical hole 264 at approximately the center in the longitudinal direction, so that it can be swung. Supported for free movement.
Further, on the upper mechanical board 51, the rotation pin 246
The tip of the comb spring 265 fixed to the upper end 246a and extending downward in FIG. 16 is connected to the idler lever 261.
It is inserted through a hole 2661 formed at the other end 261b. In addition, a pair of springs (pulling springs) 267a and 267b are connected to the rest of the idler lever 261 in a substantially V-shape, and these springs 267a and 267b keep the idler lever 261 in the vertical state as shown in FIG. It is held and is biased to slide upward in FIG. Further, as clearly shown in FIG. 19, there is an ejector 2 on the right end of the lower mechanical board 52 in FIG. 18A.
51 are provided.

Note that this ejection device 251 is connected to the operating lever 237.
The tape is configured to operate in both manual eject mode and auto eject mode at the end of the tape during playback, fast forward, and rewind modes.

Reference numeral 252 denotes an eject lever, which is rotatably supported on the lower mechanical board 52 by a fulcrum pin 253 at its longitudinally central portion.

This eject lever 252 is a spring (tension spring)
254 is rotated counterclockwise in FIG. 18A, and one end 252a thereof is opposed to and close to the tip 237b of the operation lever 237.The other end 252b is the lock lever 254 described above. A projecting piece 255 integrally formed at a position below the fulcrum pin 1 17 in 1 16 is configured so that it can be applied from the right side in Fig. 18A. It is a conversion lever, and its longitudinal center portion is rotatably supported on the lower mechanical board 52 by a fulcrum pin 257.One end 256a of this conversion lever 256
A projecting piece 2581 integrally formed on the one end 252a side of the eject lever 252 is abutted from the left side in FIG. 18A. Here, the mode switching operation and cassette ejecting operation by the operating lever device 211 and the ejecting device 261 configured as above will be explained.

First, as described above, before cassette loading is started, the head substrate 55 is moved back against the spring 217 to the retracted position shown by the solid line in FIG.

At this time, the lock claw 65 of the head board lock lever 62
engages with the locked portion 66 of the head base plate 55 as shown by the solid line in FIG. 16, and the head base plate 55 is locked in the retracted position. Also, at this time, since one cam surface 222 of the head board 55 presses the idler shaft 255 diagonally to the upper left side in FIG. 16, the idler lever 226 is slid in the same direction against the spring 231. A FWD idler 154 is spaced apart from the take-up roll stand 152. At this time, since the lower edge of the hole 233 of the head substrate 55 presses the protrusion 235 upward in FIG.
1, the pinch loaf 58 is separated from the capstan 74 by being rotated in the direction of the rebound indicator as shown by the solid line in FIG. When the above-mentioned cassette loading is performed in the above-mentioned state, the head board lock lever 62 is rotated counterclockwise by the slide plate 97 as shown by the chain line in FIG. It comes off from the hook 66.Then, the spring 217 rotates the conversion lever 214 clockwise around the fulcrum pin 2 and turtle 5 as shown by the solid line in FIG. As a result, the head substrate 55 is slid to the forward position as shown by the chain line in FIG. 16.As a result, the playback head 57 is moved forward as shown by the chain line in FIG. 50 and is brought into contact with the tape. At the same time, in synchronization with the advancement of the head substrate 55, the pinch roller lever 59 is moved by the spring 61 to the 16th
The pinch roller 5 is rotated clockwise as shown by the chain line in the figure.
8 is inserted into the front entrance 50a of the cassette 50 and crimped onto the capstan 74 as described above. Also, at this time, the motor 160 has already started rotating as described above, and the tape drive system 147 causes the capstan to
4 is rotated. Then, as the head board 55 moves forward, the cam surface 222 escapes to the position indicated by the chain line in FIG.
In Figure 6, the FWD idler 154 is slid to the right.
is crimped between the boss 149a of the flywheel 149 and the take-up roll stand 152 as shown by the chain line in FIG. As a result of the above, the tape recorder enters playback mode and the cassette 5
The tape within 0 is played back by the playback head 57.

When switching from the playback mode to the fast forward mode (FF mode), press the operating lever 23 as shown by the solid line in Fig. 18B.
Rotate the knob 237a of No. 7 from the playback position to the fast forward position.

As a result of the above, the operating lever 237 is rotated counterclockwise against the spring 247b as shown by the solid line in FIG. 188.

At this time, the operating lever 237 is rotated about the rotation pin 246 while relatively moving the guide pin 245 in an arc within the arc hole 243. Then, first pin 238
From the FWD lock part 239a of the guide groove 239 to the slope 2
While pressing 40b, it enters the FF lock portion 239c and is locked. During this time, the end 214b of the conversion lever 214 is pushed to the right in FIG. 188. As a result, the conversion lever 214 is slightly rotated counterclockwise against the spring 217 as shown in FIG. 18B. As a result, pin 21
2, the head substrate 55 is slightly retracted upward in FIG. 18B. At this time, the cam surface 2 of the head board 55
22 presses the idler shaft 225 slightly to the upper left side in FIG.
52 to the upper left side in FIG. 188. At the same time, as the head substrate 55 retreats, the protrusion 235 of the pinch roller lever 59 is pushed up by the lower edge of the hole 233 of the head substrate 55, and the pinch roller lever 59 moves against the spring 61 and moves toward the fulcrum shaft 60. The pinch roller 58 is rotated slightly counterclockwise in FIG. 18B around , and the pinch roller 58 is separated from the capstan 74. On the other hand, by rotating the operating lever 237 in the counterclockwise direction, the lower end oval part 24 is moved to the horizontal register 241.
The rotation pin 246 with which 6b is engaged is rotated in the same direction around its center. Then, the haba spring 265 is rotated in the same direction, and the idler lever 2 is rotated by this haba spring 265.
61 is stretched around the support pin 263 in the same direction against the spring 267b. As a result, the dual-purpose idler 153 is swung leftward as shown by the solid line in FIG. 188, and its upper and lower stages 153a and 153b are pressed between the flywheel 149 and the take-up reel stand 152. At this time, stick spring 2
65 resists its elasticity and collapses as shown in the figure. As a result of the above, the tape recorder is switched to the above-mentioned fast forward mode.

Next, from the playback mode to the rewind mode (REW mode)
When switching to the rewind position, the knob 237a of the operating lever 237 is rotated from the playback position to the rewind position as shown by the chain line in FIG.

As a result of the above, the operating lever 237 is rotated clockwise against the spring 247a as shown by the chain line in FIG. 18B.

At this time, the operation lever 23 is pressed in the same way as in the fast forward mode.
7 is rotated around a rotation pin 246. Then, the pin 238 moves from the FWD lock part 239a of the guide book 239 to the REW lock part 239b while pressing the slope 240a.
enters and gets locked. During this time, the conversion lever 214 is rotated slightly counterclockwise as shown in FIG. 18B in the same way as during fast forwarding, the head board 55 is also slightly retracted upward in FIG. While being separated from the stand 152, the pinch roller 58
is spaced from the capstan 74. On the other hand, at this time, the rotation pin 246 is rotated in the same direction around the sea bream center by the rotation of the operating lever 237 in the clockwise direction, and the twill spring 2
65, the idler lever 261 is rotated in the same direction about the support pin 263 against the spring 267a. As a result, the dual-purpose idler 153 is swung rightward as shown by the chain line in FIG. 18B, and its upper and lower stages 153a and 153b are pressed between the flywheel 150 and the supply reel stand 161. With the above, the tape recorder can also be switched to the rewind mode described above.

When switching from the aforementioned fast-forward and rewind modes to the playback mode, move the knob 237a of the operating lever 237 from the fast-forward and rewind layers indicated by solid lines and chain lines in Fig. 18B to the solid lines in Fig. 8A. Return to playback position.

As a result of the above, the pin 238 climbs over the FF lock part 239c and the REW lock part 239b of the guide groove 239 and returns into the FWD lock part 239a.

Then, the conversion lever 214 is rotated clockwise by the spring 217, returning from the state shown in FIG. 188 to the state shown by the solid line in FIG. The recorder is also returned to the playback mode described above. Next, the manual ejection operation of the cassette 50 during the above-described playback mode will be explained.

During the playback mode, push the knob 237a of the operating lever 237, which is in the playback position indicated by the solid line in FIG. 18A, to the right in FIG. [At this time, when the bar 237 is slid slightly to the right, the guide pin 245 relatively enters the horizontal groove 242, and thereafter both horizontal grooves 241, 242
Since the lower end oval portion 246b of the rotating pin 246 and the guide pin 245 are guided to move relatively within the rotating pin 246, the operating lever 237 is linearly moved to the right.

Further, at this time, the rotation pin 246 does not rotate. ], first, the pin 238 is placed in the FWD lock portion 239a of the guide groove 239, and the other end 214b of the conversion lever 214 is strongly pushed to the right in FIG. 18A.
The 18th A is centered around the fulcrum pin 215 against the spring 217.
It is rotated significantly counterclockwise as shown by the chain line in the figure. Then, the head substrate 56 is retracted via the pin 212 to the original retracted position indicated by the solid line in FIG. At this time, the head board lock lever 62 is quickly rotated by the spring 64 to the position shown by the solid line in FIG. locked again. Note that since the head substrate 55 is retracted to the retracted position, the reproducing head 57 and the pinch roller 5
8 is pulled out of the front entrance 50a of the cassette 50, and at the same time the running of the tape in the cassette 50 is stopped, preparations for ejecting the cassette 50 described above are made. Meanwhile, during this time, the tip 237b of the operating lever 237, which was slid to the right in FIG.
comes into contact with one end 252a of the eject lever 252,
This is pressed to the right in FIG. 18A.

This causes the eject lever 252 to move toward the fulcrum pin 25.
3 in the clockwise direction as shown by the chain line in FIG. 18A against the spring 254. As a result, the other end 252b of the eject lever 252 comes into contact with and presses the protrusion 255 of the lock lever turtle 16, which causes the lock lever 116 to move into the state shown by the solid line in FIG. 78 as described above. The spring 1 is centered around the fulcrum pin 117 as shown by the chain line.
18 in the counterclockwise direction, and the aforementioned slide plate 97 is unlocked. As a result of the above, the cassette 50 is ejected by the cassette loading device 49 described above. Further, after the cassette is ejected, the motor 160 also stops as described above. According to the manual eject operation described above, the head substrate 55 is moved backward by pushing the operating lever 237 as shown by the chain line in FIG. 18A, and then the ejecting lever 252 is rotated with the tip 237b of the operating lever 237. Since the tape recorder ejects the cassette 50, it has the advantage that the cassette 50 can be ejected even when the power to the tape recorder is turned off.

In addition, in this tape recorder, when the tape reaches the end while the tape is running in each of the playback, fast forward, and rewind modes described above, the ejection device based on tape end detection, which will be described later, operates, and the head board 55 is first moved to the retracted position in the same manner as described above. After being moved backward, the conversion lever 256 in the ejector 2518 is rotated counterclockwise as shown by the chain line in FIG. 18A, and one end 256a of the conversion lever 256 moves the protrusion 258 of the ejector lever 252 to the right in FIG. 18A. This eject lever 252 is also rotated clockwise as shown by the chain line in FIG. 18A.

Therefore, the cassette 50 can be ejected in the same manner as described above even at the end of the tape during playback, fast forward, and rewind modes.

Next, the tape end detection device 281 and the tape end ejection device 282 related thereto will be explained. (Second
(See Figures 0 to 248) First, the tape end detection device 28
1' is provided at the bottom of the winding roll table 152.

284 is an end detection lever, and one end of the end detection lever 28, 4 is inserted under the winding roll stand 152, and is swingable around the central axis 285 of the winding roll shaft 73. is supported by

The end detection lever 284 is in frictional contact with the lower surface of the winding roll table 152 with a weak force, and is configured to swing in the direction of rotation of the winding roll table 152. At this time, the rotational load on the winding reel table 152 caused by the end detection lever 284 is almost negligible. A guide groove 286 having a substantially arrowhead shape is formed in the end detection lever 284. The guide groove 286 has a central groove 287 and a pair of notch grooves 288 and 289 that are cut in a substantially triangular shape on both sides of the central groove 287 from one end 287a of the central groove 287 to approximately the center in the longitudinal direction. It is made up of. At the ends of both cut grooves 288 and 289, a pair of stepped portions 288a and 28 are provided at approximately the central portion of the central groove 287 in the longitudinal direction.
9a is formed. 291 is an end detection arm, and this end detection arm 291 is connected to the upper mechanical board 51.
It is pivotably supported by a fulcrum pin 292 below.

. This end detection arm 291 is bent into a substantially U-shape, and an end detection pin 2 is provided below one end 291a.
93 is integrally molded.
3 is fitted into the guide groove 286 from above. The guide groove 286 is curved with a curvature that almost matches the spreading radius of the end detection pin 293, and the end detection pin 293 has a central groove 287 and both cut grooves 288, 2.
It is configured to be movable within 89. The end detection arm 291 is urged to rotate counterclockwise in FIG. 20 about a fulcrum pin 292 by a spring (wound spring) 294. The other end 29 of this end detection arm 291
1b' extends below the end detection pulley 156. A cam pin 295 is integrally formed on the lower surface of this end detection pulley 156, and rotation of this end detection pulley 156 in the direction of the arrow in FIG.
This cam pin 295 is the other end 2 of the end detection arm 291.
It is configured to intermittently come into contact with 91b and perform a rolling operation. Further, a cam piece 296 is integrally formed in a portion of the end detection arm 291 near the fulcrum pin 292. This cam piece 296 has the fulcrum pin 2
A circular arc portion 296a centered at 92 and a stepped portion 296b formed at the tip of the circular arc portion 296a are provided.
is integrally molded, and a trick detection prevention pin 298 is integrally molded on the upper surface of this flat plate portion 297. On the other hand, the tape end ejection device 282 is configured to operate using the rotational force of the flywheel 149 of the capstan 74.

First, a toothless gear 302 having a toothless portion 301 on a part of its circumferential surface is disposed between the upper mechanical board 51 and the flywheel 149 near the capstan 74, and is connected to the upper mechanism by a shaft 303. It is rotatably supported on a substrate 51. The toothless gear 302 is configured to be able to engage and disengage from a small gear 304 integrally formed on the upper end of the boss 149a of the flywheel 149. Further, the shaft 303 is provided on the lower surface of this partially toothed gear 302.
An arcuate cam 305 that is eccentric with respect to the cam 305 is integrally molded. Further, a head board retraction lever 306 is disposed below the upper mechanical board 51 at an upper position in FIG.

This head board retraction lever 306 has a generally L-shape as a whole, and the right end of the head board retraction lever 306 has a fulcrum pin 3 at its right end in FIG.
07, it is rotatably supported on the upper mechanical board 51. The head board retraction lever 306 has one end 306a extending horizontally to the left in FIG.
The tip thereof is inserted under the toothless gear 302 and is configured to be able to come into contact with the circumferential surface of the arcuate cam 305. Further, a recess 308 is formed on the upper surface side in FIG. 20 at approximately the midpoint in the longitudinal direction of one end 306a, and the pin 212 hanging from the head board 55 is inserted into this recess 308 as described above. The other end 306b of the head board retraction lever 306 extends downward in FIG. 20, and comes into contact with the other end 256b of the conversion lever 256 of the ejector 251 from the right side in FIG. The head board retraction lever 306 is biased by a spring (tension spring) 309 to rotate counterclockwise in FIG. 305. Also, an eject operating lever 31 is provided at the left end in FIG. 20 to connect the tape end detection device 281 and the tape end eject device 282.
1 is placed.

This ejection operating lever 311 has a substantially L-shape as a whole, and a knob portion 312 extending leftward in FIG. 20 is integrally formed at one end 311a. The eject operating lever 311 is swingably supported under the upper mechanical board 51 by a fulcrum pin 313 at approximately the center in the longitudinal direction. Further, the other end 311b of this eject operation lever 311 is inserted into the upper part of the toothless gear 302. And this other end 3
1.1M is integrally formed with a locking portion 314 formed in a substantially fishing shape, and a pin 315 that is intermittently locked by this locking portion 314 is attached to the upper surface of the toothless gear 302. It is integrally molded. Note that this eject operation lever 3111 and spring (tension spring) 31
6 in the clockwise direction in FIG.
On the other hand, an end operating lever 317 is provided above one end 311a of the wing of the eject operating lever 31.

This end operation lever 311' project operation lever
A long hole 319 engages a pin 3 protruding from one end 3 of the 311 and a spring (tension spring) 320.
1. Therefore, in FIG. 20, the slide force is applied clockwise and to the left. The end actuation lever 317 is prevented from sliding to the left in FIG. 20 by a stopper piece 321 that is integrally bent downward from a portion of the upper mechanical board 51. The tip 317a of the end actuating lever 317 is formed into a substantially fishing shape.
It is configured to be able to engage with and disengage from the stepped portion 296b of the cam piece 296 of 91. Note that a pin 322 is integrally molded on the upper part of the other end 317b of this end actuation lever 317, and as shown in FIG. It is inserted into the formed recess 324. Also, the second recess 324
In Figure 3, a slope 325 is formed at the lower end. The auto-eject operation at the tape end during each of the playback, fast forward, and rewind modes (while the tape is running) by the tape end detection device 281 and tape end ejection device 282 described above will now be described.

Note that while the tape is running as described above, the eject operation lever
311 is located at the position of the solid line in Fig. 2Q.

At this time, one end 306a of the head board retraction lever 306 is pressed against the one end 305a of the arcuate cam 305 as shown by the solid line in FIG. As a result, the toothless gear 302 has a second
In Figure 0, a clockwise rotational force is applied. However, at this time, the pin 315 of the toothless gear 302 is locked to the locking portions 3 and 14 of the eject operation lever 3 turtle 1 as shown by the solid line in FIG.
2 is prevented from rotating in the clockwise direction. In this state, the toothless gear 302 is opposed to the small gear 384 by its toothless portion 301, and this fourth gear 38
The connection with the turtle has been severed. The tape end eject operation in both playback and fast forward modes will now be explained.
First, in both the playback and fast-forward modes, the capstan? 4 to the winding wheel table blade 52 and the end detection pulley turtle 56 are respectively second
In figure 0, it is rotated counterclockwise.

At this time, however, as shown in FIG. 24A, the end detection lever 284 is urged to rotate in the same direction due to the rotation of the unwinding roll table 152 in the counterclockwise direction.

On the other hand, due to the rotation of the end detection pulley 156 in the counterclockwise direction, the cam pin 295 is also rotated in the same direction with a constant rotation radius. Therefore, at this time, the cam pin 295 comes into contact with the end 291b of the end detection arm 291 intermittently and is rotated. By working together with the spring 294, the end detection arm 291 moves to the fulcrum pin 291 at a constant cycle. It is driven to swing back and forth around the center. At this time, since the end detection lever 284 is rotated counterclockwise, the end detection pin 293 in the guide groove 286
maintains a relatively pressed state toward one of the notch grooves 288, and the stepped portion 288a of this notch groove 288 and the central groove 2
87 and one end 287a. That is, when the end detection arm 291 is rotated clockwise by the cam pin 295, the end detection pin 293
One end 2 of the central groove 287 along the cut groove 288 from 8a.
87a.

At this time, the end detection lever 284 is pushed back to the neutral position P by the end detection pin 293 from the biased position P2, which is deflected counterclockwise against the rotating force due to the friction. One end detection arm 29
1 is rotated in the counterclockwise direction by the spring 294, the end detection pin 293 touches one end 287a of the central groove 287.
From there, it is moved along the groove 288 to the stepped portion 288a. At this time, as the end detection pin 293 moves, the end detection lever 284 is rotated counterclockwise from the neutral position P to the biased position P2. As a result of the above, the swing stroke of the end detection arm 291 is regulated, and this end detection arm 291 moves between the A position and the B position.
The cam piece 29 is constantly oscillated back and forth with the stroke of .
The step portion 296b of No. 6 is also constantly oscillated back and forth between the a position and the b position with a stroke of S,'. On the other hand, at this time, the end actuation lever 317 is rotated clockwise around the pin 318 by the spring 320, and the end actuation lever 317
7a is pressed against the circumferential surface of the arcuate portion 296a of the cam piece 296.

At this time, since the cam piece 296 is reciprocated between the a position and the b position, its hook-shaped tip 317a is attached to the cam piece 29.
It does not reach the point where it is engaged with the step portion 296b of No. 6. While the tape is running in both the fast play and fast forward modes, the tape end detection device 281 repeats the above operations.

However, when the tape reaches the end while the tape is running,
As is well known, the rotation of the winding roll shaft 73 is stopped by the tape, and the rotation of the winding roll stand 152 in the counterclockwise direction is stopped.

As a result, the force that urges the end detection lever 284 to rotate counterclockwise is also released, and the end detection lever 284 is thereafter in a free state. Meanwhile, during this time, the end detection pulley 156 continues to rotate as described above, and the aforementioned reciprocating movement of the end detection arm 291 continues. After the tape ends, the end detection pin 293 is moved from the step 288a of the guide groove 286 to the one end 287a of the central groove 287 along the cut groove 288, so that the end detection lever 284 is moved to the end detection pin 293.
As shown in FIG. 24B, it is pushed back from the rowing position P2 to the neutral position P, and is thereafter stopped at this neutral position.

On the other hand, after this, the end detection arm 291 continues to the 24th end detection arm 291.
In Fig. B, the end detection pin 293 is rotated counterclockwise, but at this time, the end detection pin 293 comes off the cut groove 288 and moves along the central groove 287. Therefore, at this time, the end detection pin 293
is not engaged with the stepped portion 288a and is moved to the other end 287b of the central groove 287, as shown by the solid line in FIG. 24B. That is, at this time, the end detection arm 291'
It will then pass through position B and swing significantly to position C.

Similarly, the stepped portion 296b of the cam piece 296 also passes through the b position and reaches the c position. At this moment, the end actuation lever 317 is rotated clockwise around the pin 318 by the force of the spring 32, and its copper-shaped tip 317a moves from the circumferential surface of the arcuate portion 296a of the cam piece 296 to the stepped portion 296b.
24B, and is engaged as shown by the solid line in FIG. 24B. Meanwhile, at the next moment, the cam pin 295 of the end detection pulley 156
As a result, the end detection lever 291 is rotated clockwise, and the end detection lever 291 is swung from the C position to the A position with a stroke of S2. Similarly, the stepped portion 296b of the cam piece 296 is also moved from the c position to the a & layer S2.
It is oscillated with a stroke of . However, when levering the cam piece 29
6 hooks the end actuation lever 317 and moves it to the second
In Figure 48, pull from the solid line position to the chain line position.

Then, this end actuation lever 317 pulls the pin 318 at the end of its elongated hole 319, and the eject operation lever 3
11 against the spring 316 around the fulcrum pin 322.
Rotate it slightly counterclockwise as shown by the chain line in Figure 0. Then, the locking portion 314 of the eject operation lever 311 locks into the pin 3.
In Fig. 20 of 15, the gear escapes to the left, and the rotation stop state of the toothless gear 302 is released.

On the other hand, since a rotational force is applied to this toothless gear 302 in the clockwise direction in FIG. 20, the toothless gear 302 meshes with the small gear 304 as shown by the chain line in FIG. Thereafter, the small gear 304 rotated by the flywheel 149 rotates the partially toothed gear 302 clockwise in FIG. 20.

This rotation causes the arcuate cam 305 to move from the other end 305b to the one end 30 of the head board retraction lever 306.
6a and press it to release the head board retraction lever 3.
66 against the spring 309 and centering on the fulcrum pin 301.
It rotates clockwise as shown by the chain line in Figure 0. When the head board retraction lever 306 is rotated as described above, the pin 212 is pushed upward by the recess 308 in FIG. locked.

As a result, as described above, the reproducing head 57 and the pinch roller 58 are pulled out of the front entrance 50a of the cassette 50 and prepared for ejection.Meanwhile, when the head board 55 is retracted, Since the slope 325 contacts the pin 322 and pushes it to the left, the end actuation lever 317 is rotated counterclockwise about the pin 318 against the spring 320, and its pot-shaped tip 317a engages the cam piece. 296 from the stepped portion 296b.Then, the eject operating lever 311 is moved from the fulcrum pin 3 by the spring 316.
13 in the clockwise direction in Figure 20,
It is moved back to the original position shown by the solid line in the figure. At this time, pin 3
The eject operating lever 317 is also pulled back to its initial position by
96 is pressed against the circumferential surface of the arcuate portion 296a. Then, as mentioned above, the head board retraction lever 3 is rotated clockwise.
The other end 306b of the ejector 251 contacts the end 256b of the conversion lever 256 of the ejector 251 and rotates it as shown by the chain line in FIG. It rotates as shown by the chain line.

As a result of the above, the lock lever 116 is unlocked as described above, and the cassette 50 is auto-ejected. When the toothless gear 302 has rotated approximately once, the toothless portion 301 enters the small gear 304 again, and the meshing with the small gear 304 is broken.

At this time, one end 306a of the head board retraction arm 306, which is moved counterclockwise in FIG. The gear 302 continues to be rotated clockwise as shown in FIG.
11, the toothless gear 302 stops rotating in the state shown by the solid line in FIG. 20 and remains in that state thereafter. Regarding the auto-eject operation, as the winding reel table 152 is rotated clockwise in FIG. 20, the end detection lever 284 is rotated in the same direction, so the end detection pin 293 is guided Except for reciprocating along the cut groove 289 on the other side of the groove 286, the operation is exactly the same as at the end of the tape in both the playback and fast-forward modes described above.

Further, according to the tape end ejection device 282 described above, the cassette 50 can be ejected very lightly even when the tape is running in each of playback, fast forward, and rewind modes.

In other words, the eject operation lever 311 is
When you push the knob 3 to the right as shown in Figure 20, the eject operating lever 311 will move against the spring 316 and
The pin 315 is rotated slightly counterclockwise as shown by the chain line in Figure 0, and the locking portion 314 of the pin 315 is released.

Then, as described above, the partially toothed gear 30-2 is driven to rotate, and a cassette eject operation that is exactly the same as the auto-eject at the tape end described above is performed. Knob section 312
Since the cassette 50 can be ejected by simply pressing lightly against the spring 316, a so-called feather touch auto-ejection can be realized.

Next, the safety device 328 attached to the tape end detection device 281 described above will be explained.

(See FIG. 25) That is, the tape end detection device 281 operates as described above.
If the end detection pin 293 were to have entered the other end 287b of the central groove 287 of the guide groove 286 when the cassette loading was performed, the motor 160 would be At the next moment when the end detection pulley 156 starts rotating, the end operating lever 317 is pulled by the end detection arm 291 as shown by the chain line in FIG. 248, and the end operating lever 311 is As a result of the oscillation as described above, the cassette 50 may be unexpectedly auto-ejected, which is very inconvenient.

Therefore, this safety device 328 is provided with the end detection pin 29.
The above-mentioned inconvenience is prevented by preventing the cassette 50 from being ejected while the cassette 50 remains inserted into the other machine 287b side of the central groove 287.

That is, reference numeral 329 denotes a tampering detection prevention lever, which is rotatably supported by a fulcrum pin 330 on the upper mechanical board 51 at a position corresponding to the upper part of the end detection arm 291.

In addition, this trick detection prevention lever 329, spring (wound spring) 33
1 in the counterclockwise direction in FIG. The trick detection prevention lever 329 has a substantially L-shape as a whole, and its one end 329a is brought into contact with a stopper 333 fixed on the upper mechanical board 51 to prevent the rebound meter from rotating in all directions. regulated. Further, a slope 334 facing the erroneous detection prevention pin 298 of the end detection arm 291 is formed on one end 329'a side of the erroneous detection prevention lever 329, and the erroneous detection prevention pin 298 is provided at the tip of this slope 334. A locking portion 335 for locking 298 is formed. In addition, the above-mentioned conspiracy detection prevention pin 2
98 is inserted through a hole 336 formed in the upper mechanical board 51 and extends to the side of the slope 334. On the other hand, a protrusion 337 for pushing up the other end 329b of the erratic detection prevention lever 329 upward in FIG. 25 is integrally formed on the left end of the head substrate 55 in FIG. However, according to the safety device 328, the protrusion 337 of the head board 55 is in the position indicated by the chain line in FIG. is located at the dotted line in Figure 25,
This protruding piece 337 does not come into contact with the erroneous detection prevention lever 329. Therefore, at these times, the false detection prevention lever 329 is in the state shown by the chain line in FIG. There is. Next, the end detection pin 293
When the motor 160 is inserted into the side as shown by the chain line in FIG. 25, the motor 160 stops, and the cassette 5
The operation when a 0 is rejected will be explained.

First, the head substrate 55 is retracted to the retracted position by the cassette eject as described above. As a result, the protruding piece 337 is moved to the position indicated by the solid line in FIG. 25.
At this time, the protruding piece 337 is activated by the false detection prevention lever 329.
In order to press against the pond end 329b, this false detection prevention lever 329 moves the spring 3 around the fulcrum pin 330.
31 in the clockwise direction in FIG. 25 and moves to the position indicated by the solid line. However, at this time, the slope 334 hits the treacherous detection prevention pin 298, and the cam action causes this to become the second
Push it to the right in Figure 5. As a result, end detection arm 2
91 is rotated clockwise in FIG. 25 about the fulcrum pin 292 and moved to the position indicated by the solid line. As a result, the end detection pin 293 is automatically pushed out from the other end 287b of the central groove 287 to approximately the center. At this time, the erroneous detection prevention pin 298 enters the lock portion 335 from the slope 334 and is temporarily secured by the lock portion 335. Note that if the cassette 50 is then loaded again and the head board 55 is moved forward, the protruding piece 337 will also be moved to the position indicated by the chain line or dotted line in FIG. Power is released. Then, at the moment when the aforementioned rotation of the end detection pulley 156 is started and the end detection arm 291 is further rotated slightly clockwise from the position indicated by the solid line in FIG. 335, the tamper detection prevention lever 329 is automatically moved back to the position indicated by the chain line in FIG. 25 by the spring 331. Next, the auto-reverse device 351 will be explained.

(See Figures 26 to 29M) This auto-reverse device 351 automatically reverses the running direction of the tape when it reaches the end of the tape during the playback mode described above to perform reverse playback, and also performs the fast forward playback described above. When the tape reaches the end during both the rewind and rewind modes, the running direction of the tape is automatically reversed and the mode is automatically switched to the playback mode.

The auto-reverse device 351 is configured so that switching to the reverse playback and playback modes can be arbitrarily performed by manual operation while the tape is running in the playback, fast forward, and reverse modes. Note that this auto-reverse device 351 can eject a cassette only by manual operation. First, as clearly shown in FIG. 26, the aforementioned pinch roller 58 is provided opposite to the one capstan 74, and this pinch roller 58 is attached to the upper mechanical board 61 by the fulcrum shaft 6. The pinch roller lever 59 is pivotally supported at the tip of the pinch roller lever 59 which is rotatably supported above.

And the other capstan 14M is another pinch.
rollers 352 are provided facing each other. This pinch loaf 352 is pivotally attached to the tip of a pinch roller lever 354 rotatably supported on the upper mechanical board 51 by a fulcrum shaft 353. Note that both pinch roller levers 59
, 354 have a mutually symmetrical shape and arrangement. A slide village 357 is provided between the spring receiving pieces 355 and 356 that are integrally provided on both the pinch roller levers 59 and 354. In addition, this slide is good 35
7 is mutually guided by elongated holes, guide pins, etc. between the upper mechanical board 51 and is configured to be slidable in the left-right direction as shown in FIG. And both the spring receiving pieces 355, 35
One spring (tension spring) 358 is tensioned between the two springs 355 and 356, and these spring receiving pieces 355 and 356 are pressed against both ends 357a and 357b of the slide punch 357. Therefore, the slide village 357 is When slid to the right in the figure, one pinch roller lever 59 is
is rotated clockwise around the fulcrum 60 by the spring 358, and one pinch roller 58 is pressed against one capstan 74.
2 is separated from the other capstan 148. Furthermore, when the slide village 357 is slid to the left in FIG. 352 is pressed to the other capstan 148, and conversely, one pinch roller 58 is pressed to the other capstan 148.
is configured to be spaced apart from one capstan 74. Further, as described above, one pinch roller lever 59 is inserted into the one hole 233 of the head substrate 55 by a protrusion 235 integrally formed therein, and the other pinch roller lever 354 is inserted into the one hole 233 of the head substrate 55. It is inserted into the other hole 234 of the head substrate 55 by a protrusion 359 that is integrally formed with the head substrate 55 . Therefore, when the head board 55 is retreated from the forward position to the backward position as described above, the lower green portions of the holes 233 and 234 in FIG. 26 push up the protrusions 235 and 359 upward in FIG. , at this time both pinch roller levers 59,
354 are rotated counterclockwise and clockwise in FIG. 26, respectively, so that both pinch rollers 58, 352 are spaced apart from both capstans 74, 148. Further, as clearly shown in FIG. 27, an FWD idler 154 supported by the idler lever 226 is disposed between the boss 149a of the one flywheel 149 and the take-up reel stand 152.

and the boss 150 of the other flywheel 150.
A FWD idler 361 for reverse playback is also arranged between a and the supply reel stand 151. This FWD
The idler 361 is supported by an idler shaft 367' at the tip of an idler lever 362. This idler lever 362 is connected to the idler lever 226.
The upper mechanical board 51 has a symmetrical shape and arrangement with respect to the upper mechanical board 51.
A pair of support pins 363, 364 provided below and fixed under the upper mechanical board 51 are provided with a pair of outermost holes 365, 3.
66, and is supported so as to be slidable in the left and right direction in FIG. 27. Furthermore, this idler lever 3
62 is biased to slide to the left in FIG. 27 by a spring (tension spring) 367. As described above, the upper end of the idler shaft 225 of one FWD idler 154 is inserted through the one hole 232a formed in the upper mechanical board 51 and into the one closing opening 220 of the head board 55. , is opposed to the one cam surface 222, and similarly, the upper end of the idler contact 367' of the other FWD idler 361 is connected to the other hole 2 of the upper mechanical board 51.
32b to the other gate 2 of the head substrate 55.
21 and is opposed to the other cam surface 223. In addition, both the idler levers 226, 362
A reversing lever 369 is arranged below. This reversing lever 369 is connected to both idler levers 226, . A fulcrum pin 370 fixed under the upper mechanical board 51 at the middle part of 362
It is configured to be able to swing freely around the center. A projecting piece 371 that is integrally bent at a portion of the reversing lever 369 near the fulcrum pin 370 is attached to both the idler levers 2 and 3.
It is inserted between 26 and 362. Further, a hole 372 is formed in a part of the reversing lever 369, and a pin 373 that is fixed and suspended below the approximately central portion of the slide punch 357 in the longitudinal direction is inserted into the hole 372. has been done. However, the reversing lever 369 is the 27th lever.
By being slightly swung clockwise about the fulcrum pin 370 as shown by the solid line in the figure, the slide punch 357 is slid to the right in FIG. 26 via the pin 373. Due to this rocking, the protruding piece 371 is separated from one idler lever 226, and the other idler lever 37
2 is slid to the right in FIG. 27 against the spring 367. Therefore, at this time, one FWD idler 154
is pressed by a spring 231 between the boss 149a of one flywheel 149 and the take-up reel stand 152 as shown by the solid line in FIG.
is spaced apart from the supply reel stand 151. Further, as the reversing lever 369 is slightly swung counterclockwise about the fulcrum pin 370 as shown by the chain line in FIG.
The slide punch 357 is slid to the left in FIG. 26 through the slide punch 357. As a result of this swinging, the protruding piece 371 separates from the other idler lever 362, causing one idler lever 226 to slide to the left in FIG. 27 against the spring 231. Therefore, at this time, the other FWD
An idler 361 is crimped by a spring 367 between the boss 150a of the other flywheel 150 and the supply reel stand 151 as shown by the chain line in FIG.
The idler 164 is spaced apart from the take-up roll table 162. Note that when the head board 55 is retreated from the forward position to the backward position as described above, both the idler shafts 225, 367' are pushed out to the upper left side and to the upper side of the stone in FIG. 27 by the cam surfaces 222, 223. , both FWD idlers 154, 361 are configured to be spaced apart from both reel stands 152, 151 against both springs 231, 367. Further, as described above, the reversing gear 375 is rotatably supported on the shaft 303 fixed under the upper mechanical board 51 in the vicinity of the capstan 74. This reversing gear 375 is a small gear of the one flywheel 149.
304 so that it can be engaged with and disengaged from it. In addition, a pair of toothless parts 376 and 377 are provided on the circumferential surface of this reversing gear 375.
is formed point-symmetrically with respect to the gear center.
Also, a pair of pins 378 are provided on the bottom surface of this reversing gear 375.
, 379 and a pair of cams 380, 381 are integrally formed in a point symmetrical shape with respect to the center of the gear. Note that a pin 382 projecting further downward is integrally formed at the end of the other cam 381. On the other hand, as described above, one end 306a of the head board retraction lever 306, which is pivotably supported under the upper mechanical board 51, is inserted into the lower part of the reversing gear 375, and is selectively connected to both the cams 380, 381. It is configured to be pressed all at once. An elongated hole 384 is formed approximately in the middle in the longitudinal direction of one end 306a of the head substrate retraction lever 306, and a pin 212 hanging from the head substrate 55 is inserted into the elongated hole 384. The reversing lever 369 is disposed below one end 306a of the head substrate retraction lever 306, and the pin 382 of the reversing gear 375 is inserted into a long hole 385 formed in the one end 369a. And this reversing gear 37
5 is configured to be driven half a rotation intermittently,
By the half rotation, the reversing lever 369 is rotated through the pin 382.
is configured to be oscillated between the position shown by the solid line and the position shown by the chain line in FIG. Further, reference numeral 387 denotes a reversing operation lever, and this reversing operation lever 387 is configured to be operated in conjunction with the tape end detection operation by the aforementioned tape end detection device 281, like the aforementioned eject operation lever 311. That is, the reversing operation lever 311 is pivotally supported under the upper mechanical board 51 by a fulcrum pin 388, and is urged to rotate clockwise in FIG. 27 by a spring (tension spring) 389. The reversing operation lever 387 has a substantially L-shape as a whole, and has a knob 390 at one end 387a.
is integrally molded. Note that the aforementioned end actuation lever 317 is attached on one end 387a. Further, a pair of lock arms 391 and 392 are integrally formed in a substantially arc shape at the end 387b of the reversing operation lever 387.
Lock portions 391a and 392a for alternately locking a pair of front-end pins 378 and 379 are formed at the tips of 1,392. Further, as clearly shown in FIGS. 27 and 28, the 28th section of the side plate 85 on the lower mechanical board 62
An eject operating lever 394 is provided inside the left end in the figure.

The ejection operating lever 394 is mutually guided by a side plate 399 of the upper mechanical board 51 through elongated holes, guide pins, etc., and is configured to be slidable in the left-right direction as shown in FIG. Further, an ejection prevention lever 395 is rotatably supported by a fulcrum pin 396 on the left machine portion of the side plate 85 in FIG. This ejection prevention lever 395 has a substantially L-shape, and a lock pin 397 is fixed at right angles to one end 395a. The lock pin 397 is configured to be able to freely enter and exit a notch 398 formed in the upper twill portion of the side plate 85. As described above, when the cassette 50 is loaded and the slide plate 97 is slid to the right as shown by the solid line in FIG. 28, the lock pin 397 enters into the notch 398 as shown by the solid line in FIG. The lock pin 397 is configured to lock the end portion 400 of the slide plate 97. Also, a spring receiver 4 integrally formed in a part of the eject operation lever 394
01 and Ikehata 395 of the ejection prevention lever 395
This eject operation lever 39
4 is biased to slide to the left in FIG. 28, and is configured such that a protrusion 404 integrally formed on a portion thereof abuts against the other end 395b of the ejection prevention lever 395 and stops. Further, a protruding piece 405 integrally formed on a part of the eject operating lever 394 is connected to a pin 406 fixed to the knob portion 390 of the reversing operating lever 387.
In FIG. 27, it is abutted from the left direction. In this section, the operation of the auto-reverse device 351 described above will be explained.

First, when the cassette 50 is loaded as described above, the playback mode is entered as described above.

However, in this auto-reverse device 351, when cassette loading is performed, the tape is run in the opposite direction to the tape running direction when the previous cassette ejection was performed. However, in the auto-reverse device 351, in the state before cassette loading starts, the lock pin 39 of the eject prevention lever 395 is
7 is pressed onto the upper edge 407 of the end portion 400 of the slide plate 97 as shown by the chain line in FIG. 28 by the spring force of the spring 403.

When the slide plate 97 is slid to the right as shown by the solid line in FIG. 28 due to the loading of the cassette 50 described above, the ejection prevention lever 395 is rotated clockwise around the fulcrum pin 396 by the spring 403. A lock pin 397 falls into the notch 398 from the upper green 407 and locks the slide plate 97 at its sliding position at the end 400 portion of the slide plate 97. Thereafter, the slide plate 97 is prevented from moving back to the left in FIG. As described above, the cassette 50 is ejected only when the slide plate 97 is moved back to the left in FIG. 28, so by preventing the slide plate 97 from moving back as described above,
This makes it possible to prevent the cassette 50 from being ejected. It is assumed that the above-described cassette loading has been performed and the tape recorder is now in a normal playback state. In this normal playback state, as shown in FIG. 29A, one pinch roller 58 is pressed against one capstan 74, and one FWD idler 154 is pressed against one flywheel 149.
is crimped between the boss 149a and the take-up roll stand 152.

Therefore, at this time, the tape in the cassette 50 is driven to run by one of the capstans 74, and by the rotational drive of the take-up roll shaft 73, it is wound toward the take-up roll shaft 73 in a leftward direction in FIG. 29A. It is being run on. In the above-mentioned normal playback state, the above-described switching to fast forward and rewind can be freely performed by switching the operating lever 237 as described above.

In addition, in the normal playback state described above, "one end 306a of the head board retraction lever 386 is pressing the other cam 381 of the reversing gear 375 by the spring force of the spring 309.
This reversing gear 375 is rotated clockwise as shown in FIG.
Since it is locked at point a, the clockwise rotation of the reversing gear 375 is prevented.

At this time, the reversing gear 375 faces the small gear 304 at one toothless portion 376, and the dovetailing with the small gear 304 is cut off. However, when the tape reaches the end in the normal playback state, the tape end detection device 282 is operated as described above, and the end operation lever 317 causes the reversing operation lever 387 to swing slightly counterclockwise as shown by the chain line in FIG. 29B. be done. Then, the lock part 391a
is removed from pin 378. And at this moment, the flip-flop
375 is rotated slightly clockwise in FIG. 29B and is engaged with the small gear 304. Then after this small gya 384
The reversing gear 375 is rotationally driven in FIG. 29B, and the reversing gear 375 is driven half a rotation clockwise in FIG. 29B.
As a result, the head board retraction lever 306 is first swung clockwise by one cam 380 of the reversing gear 375 against the spring 309 as shown by the chain line in FIG.
12, the head substrate 55 is retracted as described above. At this time, the head board retraction lever 306 is in the 29th C position.
By rotating clockwise as shown by the chain line in the figure, the eject lever 252 is rotated via the conversion lever 256 as described above.
is rotated clockwise as shown by the chain line in FIG. 29C, and the aforementioned lock lever 116 is rotated clockwise as shown by the chain line in FIG.
Remove from 1 for a moment.

However, at this time, as mentioned above, since the slide plate 97 is locked by the ejection prevention lever 395, the ejection prevention lever 395 does not move back.
No ejection operation of the cassette 50 occurs. Later, when the head board retraction lever 306 is moved back in the counterclockwise direction as shown by the solid line in FIG. 29C, the lock lever 116 is also moved back in the counterclockwise direction as shown in the solid line in FIG. will be locked by the lock pin 121 again. When the head board 55 is moved backward, the projections 235, 359 of the pinch roller levers 59, 354 are pushed, and the pinch roller levers 59, 354 resist the spring 358 as indicated by the chain lines in FIG. 29E. It was rotated as if
Both pinch rollers 58, 352 are attached to both capstans 74, i.
Separated from 48.

At the same time, both idler shafts 225 and 367' are pushed by both cam surfaces 222 and 223, and both idler levers 226 and 371 are rotated as shown by chain lines in FIG. ，
151 as shown in FIG. 29F. Meanwhile, the reversing lever 36 is moved by the pin 382 of the reversing gear 375.
9 is rotated counterclockwise as shown by the chain line in FIG. 29D, and the slide village 357 is slid as shown by the chain line in FIG. 29D via the L pin 373.

As a result, one end 357a of this slide punch 357 comes into contact with the spring receiving piece 355 of one pinch roller lever 59,
Thereafter, this pinch roller lever 59 is locked in that position. Therefore, from now on, one pinch roller 58' is kept separated from one capstan 74.
At this time, the protruding piece 371 of the reversing lever 369 comes into contact with the side surface of one of the idler levers 226 as shown by the chain line in FIG. 29F, and locks the idler lever 226 in that position. Therefore, from now on, one FWD idler 154
is maintained apart from the winding reel table 152. When the other reversing gear 375 is turned 1/3 of a turn, one cam 3801 causes the head board retraction lever 3 to move.
The clockwise swinging ends in FIG. 29G of 06, and thereafter the head board retraction lever 306 is rotated counterclockwise as shown by the chain line in FIG. 29G by the spring 309.

At this time, one end 3 of the head board retraction lever 306
06a will now push one cam 308 in the opposite direction, thereby causing the reversing gear 375 to continue to rotate clockwise in FIG. 29G. Note that as the head board retraction lever 306 is rotated counterclockwise, the pin 212
The head substrate 55 is again advanced through the. During this period, one pin 378 comes into contact with the other lock portion 392b of the reversing operation lever 387 as shown by the solid line in the 29th drawing.

After that, the reversing operation lever 387 is moved back as shown by the chain line in the 29th figure, and the other pin 379 is then locked by one locking portion 398a of the reversing operation lever 387 as shown by the chain line in the 29th figure. The half rotation of the reversing gear 376 is stopped. At this point, the other toothless portion 377 of the reversing gear 375 has entered the small gear 3Q4, and the meshing of this reversing gear 375 with the small gear 304 has been cut off again. When the head substrate 55 is moved forward again, the other pinch roller 352 is pressed against the other capstan 14 as shown in FIG. 291, and the other FWD idler 381 is pressed against the other flywheel angle 50. is pressed between the boss portion 188a and the supply reel stand 151.

As a result, the tape in the cassette shop Q is now driven by the other capstan;
2, the reel is rotated to the right in FIG. 291 so as to be wound onto the supply reel shaft 72 side.

As a result of the above, the running direction of the tape is reversed with respect to the normal playback state, and so-called "reverse playback" is performed.When the tape reaches the end in this reverse playback state, the reversing gear 375 moves to the 29th
It is again rotated half a turn clockwise in the figure.

As a result, the reversing lever 369 is swung clockwise as shown by the chain line in FIG.
Slide to the right as shown by the chain line in the figure ~Other end 35
7b is the spring receiving piece 35 of the other pinch roller lever 354
6 as shown by the solid line in Fig. 29K to lock it in the clockwise rotated state as shown in Fig. 29K. Also, the beam piece 371 of the reversing lever 369 pushes the other idler lever 362 as shown by the solid line in FIG. Therefore, as described above, when the head substrate 55 is moved forward again after being once retreated, the 29th
As shown in Figure A, one pinch roller 58 and FWD idler 154 are pressed between one capstan 74 and the boss 149a of the flywheel 149, respectively, and the take-up reel stand 152, and the normal playback state is switched again. .

According to this auto-reverse device 351, each time a tape end occurs, the reproduction state is automatically switched between the normal playback state and the ij verse playback state described above.

On the other hand, according to this auto-reverse device 361, as described above, by operating the bar 237 in the middle of the playback mode, it is possible to switch between the fast-forward and rewind modes. When the end of the tape is reached, the same reversing operation as described above is performed, the tape running direction is reversed, and the ``playback mode'' is automatically switched.

- That is, when the tape ends in the fast forward mode, it is switched to the verse playback state as described above, and when the tape ends in the rewind mode, it is switched to the normal playback state as described above. In the middle of each of the above-mentioned normal playback, reverse playback, fast forward, and rewind modes, press the knob 390 of the reversing operation lever 387 by hand as shown by the chain line in FIG. When it is rotated, the same reversing operation as described above is performed.

Therefore, the above-mentioned normal reproduction-reverse, fast-forward to reverse reproduction, and rewind to normal reproduction can be freely performed at any time by manual operation.
Further, in this case, it is only necessary to lightly touch the knob portion 39 of the reversing operation lever 387, so that switching can be performed using a so-called feather touch method. Further, with this auto-reverse diamond pupil 351, ejection of the cassette 58 can only be performed by manual operation.

That is, when the eject operating lever 394 is pushed lightly as shown by the chain line in FIG. 29 while the tape is running as described above, the protrusion 405 hits and pushes the pin 406, and the reversing operation lever 387 is moved as shown by the chain line in FIG. 29M. oscillate counterclockwise.

As a result, as described above, the head board retraction lever 306 is swung as shown by the chain line in FIG. 29C, and the lock lever 11
6 is unlocked by the lock pin 121. On the other hand, at this time, the eject operation lever 394 pushes the other end 395b of the ejection prevention lever 395 with its projection 404, so the ejection prevention lever 395 rotates counterclockwise as shown by the chain line in FIG. 29M against the spring 403. The lock pin 397 is attached to the end 400 of the slide plate 97.
removed above. As a result of the above, the lock of the slide plate 97 is released, and the slide plate 97 is slid to the left in FIG. 29M by the spring 99, and the cassette 50 is ejected as described above. Next, the auto repeat device 409 will be explained.

(See Figures 30 to 31B) This auto-repeat device 409 automatically reverses the running direction of the tape when it reaches tape end during the playback mode described above, rewinds the tape at high speed, and When the tape reaches the end during high-speed rewinding, the running direction of the tape is automatically reversed and the tape is switched back to playback mode. Do the following.

Furthermore, this auto-repeat device 409 is configured so that the reversal between the playback mode and the high-speed rewind mode can be arbitrarily performed by manual operation while the tape is running in each of the playback and high-speed rewind modes. ing. The structure of this auto-repeat device 409 will be described below, but the overall structure is almost the same as the auto-reverse device 351 described above, and only the noisy part is different.

Therefore, only the different structural parts will be explained. First, the third
As clearly shown in FIG. 0, the pinch roller 5-8 described above is provided only on the one capstan 74 side.

The spring 358 for pressing the pinch roller is stretched between the spring receiving piece 355 of the pinch roller arm 59 of the pinch roller 58 and the other end 357b of the slide punch 357. is slide pestle 3
57 is pressed against one end 357a. Further, the above-mentioned reversing gear 375 is used as is, but at this time, of the two cams 380, 381 of this reversing gear 375, the other cam 381 is connected to the large cam 4 as shown in FIG.
It consists of 101 pieces. In addition, in order to increase the running speed of the tape during rewinding, the other flywheel 1
A large repeat gear 411 is provided on the 50 side. And this repeat gear 41 when rewinding at high speed
1 and the supply reel stand 151 to transmit rotational force between the flywheel 150 and the supply V supply reel stand 151. It is rotatably supported. It should be noted that the gear 41 with which the repeat gear 412 is to mesh is formed on the circumferential surface of the supply reel 151.
4 is formed. In this case, the drive system of the supply reel stand 151 was configured to be a gear drive system in order to ensure high-speed rotational drive of the supply reel stand 151 by the flywheel 1501 during high-speed winding, but it is not necessarily configured to be a gear drive system. It is not necessary to do so, and it is also possible to adopt an idler drive system using ordinary friction transmission wheels.
In addition, in this case, a repeat operation lever 415 having exactly the same structure as the above-mentioned reversing operation lever 387 is used.
-16 is its knob, 417 is its fulcrum pin, 418
419 and 420 are the pair of lock arms, and 419a and 420a are the pair of lock portions, respectively. Further, in this auto-repeat device 409, a pin 421 corresponding to the other cam surface 223 of the head substrate 55 described above is provided on the other idler lever 362 separately from the shaft 413.

The operation of the auto-repeat device 409 mentioned above will be explained.

First, in the normal playback mode, the reversing lever 369 is in the 31st position.
In the state shown in Fig. A, the FWD idler 154 is pressed between the boss 149a of one flywheel 149 and the take-up reel stand 152, and the repeat gear 412 is separated by the gear 414 of the supply reel stand 151. ing.

Further, the slide punch 367 is slid to the right by the pin 373 as shown by the solid line in FIG. 30, and the pinch roller 58 is pressed against one capstan 74 by the spring 358. ‐‐ Therefore, in this state, cassette 5
The tape in 0 is driven to travel by one capstan 74, and by the rotational drive of the winding roll shaft 73, it travels to the left in Fig. 3Q so as to be wound onto the winding roll T3 side. Normal playback is occurring.

In this reproduction mode, as described above, one end 306a of the head board retraction lever 386 is moved by the spring force of the spring 389 to the cam 381 of the reversing gear 375, as shown in FIG. 31A.
``This reversing gear 375 is rotated clockwise as shown in Figure 31A, but at this time, the 3rd Army A
As shown in the figure, one pin 378 is connected to the repeat operation lever 415.
Because it is locked at one lock part 419a of ~
The clockwise rotation of the reversing gear 375 is prevented.

At this time, the reversing gear 376' faces the small gear 3 crab 4 at the toothless portion 37 on the other side, and the engagement with the gear 4 and the gear 3041 is broken. However, when the tape end is reached in this playback mode, the tape end detection device 282 is operated as described above, and the end actuation lever 3 is also activated, causing the repeat operation lever umbrella blade 5 to turn as shown by the chain line in Figure 3A. Slightly rocked clockwise. Then lock part 4
19a is removed from pin 378. At this moment, the reversing gear 375 is slightly rotated clockwise in FIG. 31A and is dovetailed with the small gear 384. Then, after this, small gear 3
84, the reversing gear 375 is rotated clockwise in FIG. 3A as described above. As a result, as described above, the head board is moved backward by the large cam 41 of the reversing gear 375, and the bar 306 is moved clockwise in the third frame A against the spring 3Q9. Then, the head substrate 55 is temporarily retreated from the position shown by the solid line to the position shown by the chain line in FIG. At this time, as described above, the rocking of the head board retraction lever 306 unlocks the lock pin 121 caused by the puck lever 6'; Therefore, ejection of cassette 50 does not occur.

Further, when the head board 55 is retreated, the pinch roller lever 59 is rotated in the direction of the rebound indicator as shown by the chain line in FIG. 3Q against the spring 358 as described above.
8 is separated from the capstan 74 by one.

At this time, both the cam surfaces 2227223 of the head board S6 push the idler track 225 and the pin turtle 21 to the left and right in FIG. It is separated from the table 152 as shown in FIG. 318. At this time, the other idler lever 362 is also rotated, and the other repeat gear 412 is further separated from the supply reel stand 151. Meanwhile, pin 38 of the reversing gear 375
2, the reversing lever 369 is rotated counterclockwise in FIG. 31A, and the slide punch 357 is slid to the left in FIG. 30 via the pin 373.

On the other hand, when the reversing gear 375 has been rotated approximately 1'3, the swing of the head board retraction lever 3Q6, which is connected to the large cam 4, ends in the clockwise direction as shown in Fig. 31A. 306' is rotated counterclockwise in the third turtle figure A by the spring 3Q9. At this time, one end 3Q6a of the head substrate retraction lever 306 will now push the large cam mother IQ in the opposite direction, and as a result, the reversing gear 375 will continue to rotate clockwise in FIG. 31A. As the head substrate retraction lever 306 is rotated in the counterclockwise direction, the head substrate 55 is moved forward again via the pin 212. Also, during this time, as mentioned above, one pin 378 hits the other lock part 420a of the repeat operation lever 4 S as shown by the chain line in the third wing A figure, and after the parenthesis, the repeat operation lever 41 is In Fig. 31A, the other pin 379 is moved back to the position indicated by the solid line, and the other pin 379 is locked by the turtle wing ga of one of the locking parts of the repeat operation lever 4 and 5.Then, the reverse gear is moved as shown in Fig. 318. -375 is the other toothless part 377 after completing half a rotation.
Even if the small gear 304 is opposed to the small gear 304, the meshing with the small gear 304 is again cut off and stopped. Then, by driving the reversing gear 375 by half a rotation, the reversing lever 369
is swung to the position shown in Figure B of the third trial, and the slide punch 357 is slid to the position shown by the chain line in Figure 30.

As a result, one end 357a of the slide village 357 comes into contact with the spring receiving piece 355 of the pinch roller lever 59, and thereafter the pinch roller lever flea 9 is locked in that position. Therefore, from now on, this pinch roller 58 will be connected to one capstan 7.
4. At this time, however, the head substrate retraction lever 306, which is moved back counterclockwise in FIG. 31A as described above, stops when it is moved back to the position shown in FIG. 31B, and does not return to the original position shown in FIG. 31A. Not moved.

That is, since the cam 410 of the reversing gear 375 is configured as a large cam, one end 306a of the head board retraction lever 306 is connected to the other cam 381 as in the above-mentioned playback mode.
The large cam 410 limits the amount of backward movement of the head substrate retraction lever 306, and the head substrate retraction lever 306 is moved back to the position shown in FIG. 31B and stopped at that position. Ru. The amount of advance of the head substrate 55 is also limited by the head substrate retraction lever 306 via the pin 212, and at this time the head substrate 55 is advanced to the position indicated by the dotted line in FIG. 30 and stopped at that position. Since the head substrate 55 has stopped at the position indicated by the dotted line in FIG. 30, one of the cam surfaces 222 keeps the idler shaft 225 pressed in the leftward direction in FIG. 30. Therefore, FWD idler 15
4' Even if the head substrate 55 moves forward as described above, it is still maintained in a state separated from the winding roll table 152 as shown in FIG. 31B. However, at this time, since the reversing lever 369 is swung to the position shown in FIG. 31B, its protrusion 371 is separated from the other idler lever 362, and therefore the head board 55 is moved back to the position indicated by the dotted line in FIG. At times, the repeat gear 412 is engaged between the repeat gear 411 and the gear 414 of the supply reel stand 151 as shown in FIG. 31B.

At this time, the pin 421 of the idler lever 362 is slightly floating relative to the other cam surface 223 of the head substrate 55. As a result of the above, the tape recorder is switched to high speed rewind mode.

That is, the clockwise rotational force of the other flywheel 150 in FIG. 31B is transmitted from repeat gear 411 to supply reel 151 via repeat gear 412 and gear 414, and this supply reel stand 151 rotates clockwise in FIG. 31B. It is rotated at high speed in the direction. On the other hand, the pinch roller 58 is spaced apart from the capstan 74. Therefore, in this high-speed rewinding mode, the tape is run rightward at high speed in FIG. 30 in order to be wound onto the supply reel shaft 72 side, thereby performing high-speed rewinding of the tape.
, and when the tape reaches the end again in the high-speed rewind mode as described above, the reverse gear 375 is
is rotated half a turn again to return to the state shown in FIG. 31A.

As a result, the reversing lever 369 is also moved back to the position shown in FIG. 31A, and the slide punch 357 is also moved back to the position shown by the solid line in FIG. 30. Then, the protruding piece 371 of the reversing lever 369 pushes the other idler lever 362 as shown in FIG.
Lock it away from the At this time, it is preferable that the repeat gear 412 is also spaced apart from the repeat gear 411. Therefore, when the head substrate 55 is once retracted and then moved forward again as described above, the pinch roller 58 is attached to the capstan 74 as shown by the solid line in FIG. The tape recorder is pressed between the boss 149a and the take-up roll stand 152, and the tape recorder is switched to the playback mode again.

According to this auto-repeat device 409, the above-described reproduction mode and high-speed rewind mode are automatically repeated every time a tape end occurs, thereby performing a so-called repeat operation.

Further, according to this auto-repeat device 409, in the middle of the above-described playback mode and high-speed rewind mode, the knob portion 416 of the repeat operation lever 415 is pressed by hand, and the repeat operation lever 415 is rotated as shown by the chain line in FIG. 31A. When rocking clockwise, a reversal action similar to that described above is performed.

Therefore, the above-described reversal between the reproduction mode and the high-speed rewind mode can be freely performed at any time by manual operation. Although the embodiments of the present invention have been described above, the present invention is not limited to tape recorders for car stereos, but can also be applied to tape recorders for various other uses and other types of recording using cassettes containing various recording media. It can be applied to a very wide range of playback devices and the like.

In particular, in the auto-reverse device 351 mentioned above,
A toggle mechanism is provided so that the ejection prevention lever 395 can be held selectively between the locked position shown by the solid line in FIG. 28 and the unlocked position shown by the chain line in FIG. By using this toggle mechanism, if the eject prevention lever 395 is arbitrarily rotated to the unlocked position and held at that position, the cassette 50 is automatically ejected at the end of the tape during normal playback or reverse playback. It becomes possible to do so.

As mainly explained in FIGS. 9 and 10, the present invention
A brake member whose one end can come into contact with the cassette ejecting member and whose other end can support the ejected cassette.
For example, a cassette ejecting member [brake plate 142] is movably attached to a cassette holder [e.g., cassette holder 53], and is moved back from a forward position to a backward position by the restoring force of a spring (e.g., spring 98) when ejecting a cassette. For example, just before the slide plate 91 reaches its backward and forward movement, the cassette ejection member is loosened against one end of the brake member, and the other end of the brake member is applied with a force corresponding to the restoring force of the spring. This cassette ejecting device is configured to apply a brake to the ejected cassette in support of the ejected cassette.

Therefore, according to the present invention, the cassette ejecting force caused by the restoring force of the cassette ejecting spring that ejects the cassette out of the cassette holder via the cassette ejecting member can be converted into the braking of the cassette by the brake member. can be set to an appropriate and stable value without variation according to the cassette ejection force. That is, when the cassette ejection force is strong and the cassette flies out of the cassette holder, the braking force also becomes strong, so that the cassette can be reliably stopped at a predetermined position by the strong braking force. Conversely, when the cassette ejection force is weak and the amount of the cassette that pops out of the cassette holder tends to be insufficient, the braking force will also be weak, making it difficult to reliably push the cassette to the specified position against the weak braking force. I can do it. As a result, the amount of protrusion of the cassette is always constant, and the cassette can always be accurately ejected to a predetermined position outside the cassette holder. Moreover, since the braking force can be set at a stable value that is appropriate and consistent with the cassette ejecting force with almost no adjustment, assembly and adjustment are very easy and productivity is very high. In addition, in the embodiment, the brake plate 14 which is a brake member
2 has been configured in a rolling manner, but it is not limited to this.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment in which the present invention is applied to a tape recorder for a car stereo, and FIGS. IA to 8 relate to a cassette loading device, and FIGS. 2A and 2B are overall perspective views showing the cassette loading state, FIG. 3 is an exploded perspective view of the main parts of the same, and FIG. 4A is an overall perspective view showing the cassette loading start state. 4A in Figure IA
- 4A line sectional view, Figure 4B is a 4B-4B line sectional view in Figure 2A, Figure 5A is a 5A-5A line sectional view in Figure IA,
Figure 5B is a sectional view taken along the line 5B-5B in Figure 2A; Figure 6A is a sectional view taken along the line 6A-6A in Figure IA;
The 6B-6B line arrow view in the figure, Figure 7A is the 7 in Figure 5A.
A-7A line sectional view, Figure 7B is 7B-7B in Figure 58
The line sectional view and FIG. 8 are perspective views of the cassette mounting position portion.

FIG. 9 is a partially cutaway plan view of the cassette brake device, and FIG. 10 is a partially cutaway side view of the same. FIG. 11 is a perspective view of the tape running drive system, and FIG. 12 is a plan view of the same. 13A to 15 relate to the power loading device, and FIGS. 13A to 13C are plan views illustrating the power loading operation, and are shown with the upper mechanical board removed. FIG. 14 is a sectional view taken along the line 14-14 in FIG. 13A, and FIG. 15 is a perspective view of the main parts of the same. 16 to 19 relate to the operating lever device for mode switching, and FIG. 16 is a plan view of the head board portion;
7 is a sectional view taken along the line 17-17 in FIG. 16, and FIGS. 18A and 18B are plan views for explaining the mode switching operation, and these are shown with the upper mechanical board removed. FIG. 19 is a perspective view of the eject device. 20 to 248 relate to the tape end detection device and the tape end ejection device, FIG. 20 is an overall plan view, FIG. 21 is a perspective view showing the drive system, and FIG. 22 is the state related to the same lever. FIG. 23 is a plan view illustrating the related operation between the head substrate and the eject operating lever. FIGS. 24A and 24B are enlarged plan views of the main parts that perform the tape end detection operation, and are shown with the upper mechanical board removed. FIG. 25 is a plan view of the safety device, with the upper mechanical board removed. 26 to 29M relate to the auto-reverse device, FIG. 26 is a plan view of the head board portion, FIG. 27 is a plan view of the same as above with the upper mechanical board removed,
Figure 28 is a view taken along the line 28-28 in Figure 27, and Figure 29A.
29M are perspective views illustrating auto-reverse operation. Figures 30 to 31B relate to the auto-repeat device; Figure 30 is a plan view of the head board portion, and Figures 31A and 31B are plan views illustrating the auto-repeat operation, with the upper mechanical board removed. It is in a state of
In addition, in the reference numerals used in the drawings, 501 is a cassette, 53 is a cassette holder, 91 is a slide plate which is a cassette ejection part, 98 is a spring, and 142 is a brake plate which is a brake member.

Figure 1Figure 1 Figure 2 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 13 Figure 14 Figure 15 Figure 17 Figure 16 Figure 19 Figure 18 Figure 18 Figure 20 Figure 21 Figure 22 Figure 23 Fig. Figure 25 Figure 26 Figure 27 False figure phantom map Figure number Figure 29 Figure 29 No. map Figure 31 Figure 31

Claims (1)

[Claims] 1. A cassette ejecting member is reciprocatably attached to a cassette holder for mounting and ejecting an inserted cassette from the cassette mounting position, and when mounting a cassette, the cassette ejecting member is pressed by the cassette inserted into the cassette holder. The lever moves the cassette ejecting member from the backward movement position to the forward movement position against the spring, and when the cassette is ejected, the cassette ejection member is moved back from the forward movement position to the forward movement position by the restoring force of the spring. In a cassette ejection device configured to eject a cassette to a predetermined position outside a cassette holder by means of a cassette ejection member, one end can come into contact with the cassette ejection member, and the other end can come into contact with the cassette to be ejected. A brake member is movably attached to the cassette holder, and when the cassette is ejected, the cassette discharge member, which is moved back from the forward position to the backward movement position by the restoring force of the spring, is moved back to the backward movement position. A cassette discharge member is brought into contact with one end of the brake member, and the other end of the brake member is brought into contact with the discharged cassette with a force corresponding to the restoring force of the spring to apply a brake to the cassette. A cassette ejecting device characterized by being configured as follows.