JPS5840259B2 - Cassette recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette type tape recorder.
The cassette can be easily inserted and removed, and eject, fast forward, and rewind operations can be performed with a single lever.

The following will be explained with reference to the drawings shown as examples. FIG. 1 shows the state before a tape cassette is inserted, and FIG. 2 shows the playing state, although the cassette is not shown.

In the figure, the cassette is placed in cassette holders 4 and 5 which are movable up and down with respect to the side plates 1 and 2 inside the side plates 1 and 2 of the U-shaped chassis consisting of the side plates 1 and 2 and the bottom plate 3 from the front a side. inserted.

The front portion a is shaped to expand outward so that the cassette can be easily inserted into the cassette holders 4 and 5.

Furthermore, the holders 4 and 5 each have two pins 6.7,
The holder 4 is fitted into the long holes 8 and 9 provided in the side plates 1 and 2.
, 5 is regulated.

Reference numeral 10 designates a pin for preventing damage to the guide of the cassette due to the provision of a piece 10' in the area where the pin 7 is provided when forming the holders 4 and 5.

Reference numerals 11 and 12 designate arms whose bases are rotatably supported by shafts 13 and 14 fixed to the bottom plate 3, and which have cassette detection pieces 17 and 18 at their tips.

In this case, arms 11.12 are partially connected to pins 19 through long holes (not shown) to synchronize the rotations of arms 11.12, while springs 15 provided on shafts 13, 14,
16, the cassette detection pieces 17 and 18 are constantly pressurized in the direction of a knob 39, which will be described later.

Reference numerals 21 and 22 are holes provided in the arms 11 and 12, into which a screwdriver, which is an adjustment tool, is inserted when adjusting the mounting angle of the magnetic head 20.

In this case, the holes 21,22 may be kerfed, as indicated by bb in FIG.

23 and 24 are stoppers provided at the bases of the arms 11 and 12, and 25 and 26 are pins 27 provided on the bottom plate 3 as shown in FIG. It has an elongated hole 28 through which it is inserted, an L-shaped guide hole 29, and a cam portion 30.

31 is a shaft rod for synchronizing the movement of the flat cams 25, 26, 32 is a capstan 33, 34, IJ-# shaft 35.
36 is a motor that rotates 36, and 37 is a chassis flat plate that has protrusions 38 on both sides to be inserted into the guide holes 29 of the flat cams 25 and 26, and has a knob 39 on the front side and a magnetic head 20 on the rear side. It is provided on the bottom plate 3.

In this case, the chassis flat plate 37 is movable in the direction shown by arrow A in FIG. 2, and is rotatable in the direction of arrow B only in the state shown in FIG.

40. 41 is a spring that is attached at one end to the chassis flat plate 37 and the other end to the bottom plate 3, and always pulls the chassis flat plate 37 in the front direction; 42 is a mounting base for attaching the reel shafts 35 and 36; It is formed so as to be exposed on the bottom plate 3 and chassis flat plate 37.

Reference numeral 43 designates a flyhole retaining plate that is attached to the lower side of the bottom plate 3 by a mounting shaft 44 and coupled to the capstans 33 and 34.

Here, the operation related to the conventional configuration will be explained.

(1) When the cassette is inserted from a state where the cassette is not inserted, the stopper parts 23 and 24 of the arms 11 and 12 are connected to the flat cam 2.
The flat cam 25.26 is engaged with the cam portion 30 of the arm 11.26 as shown in FIG. 1, and the position of the cassette detection pieces 17, 18 of the arm 11.12 is regulated.

On the other hand, the chassis flat plate 37 is constantly pulled forward by springs 40 and 41, but the projecting piece 38
．． Since it is engaged with the portion 29 of 26, the flat cam 25.
It is locked by 26.

At this time, if the cassette can be inserted into the cassette holder 4.5 from part a, the arm 11.
12 cassette detection pieces 17 and 18 hit, and the arm 11
．． 12 starts rotating around the shaft 13.14.

This allows the stopper part 23.24 of the arm 11.12 to
The cassette is attached to the cassette holder 4 in order to act on the cam portion 30 of the flat cam 25, 26 to release the lock.
, 5 is unlocked when a certain amount is inserted.

Accordingly, the flat cams 25 and 26 rotate about the pin 27 based on the tension of the springs 40 and 41, while the chassis plate 37 also moves toward the front.

The relationship between the L-shaped guide hole 29 and the protruding piece 38 of the flat cam 25, 26 changes from the state shown in FIG. 1 to the state shown in FIG. 2, and the flat cam 2
5.26 and the amount of movement of the chassis flat plate 37 are the above guide holes 2.
9 and the protruding piece 38.

At this time, part of the stopper of arms 11 and 12': 23°24
corresponds to the inner surface of the cam portion 30 of the flat cam 25, 26 as shown in FIG. 2, and the rotation of the arm 11, 12 is locked.

Further, as the chassis flat plate 37 moves as shown in FIG. 2, the cassette holders 4 and 5 also move as shown in FIG. , reel axis 35°36
correspond to

The pinch roller will be described later, but at this point it is in the playing state.

(2) When ejecting the cassette, when the knob 39 is pushed in the direction of the reel shafts 35 and 36 against the force of the springs 40 and 41, the chassis flat plate 37 moves to the bottom plate 3.
Move horizontally on top.

(Therefore, the protruding piece 38 provided on the chassis flat plate 37 also moves horizontally within the guide hole 29.

) When the knob 39 is further depressed, the protrusion 38 hits the wall of the guide hole 29 and acts to rotate the flat cams 25 and 26.

As a result, the flat cams 25 and 26 begin to rotate, but in the process, as the flat cams 25 and 26 rotate, the cassette holder 4.5 is pushed upward by the pin 6, and when rotated by a certain amount, the arms 11 and 12 are locked. is released, the arms 11 and 12 are restored to the state shown in FIG. 1 by the action of the springs 15 and 16, and the cassette is struck by the cassette detection piece 17 and 18 so as to release the cassette from the cassette holder 4.5. .

That is, in the stopped state shown in FIG. 1, the stopper parts 23, 24 of the flat cams 25, 26 and the cam part 30 are locked, so that the arms 11, 12, the cassette holder 4°5, the flat cams 25, 26,
The chassis flat plate 37 is locked, and in the playing state shown in FIG. 2, the flat cam 25.26 locks the chassis flat plate 37 and the arm 11.12.

Although not shown, in the state shown in Fig. 2, the reel shaft 35
．． The driving force is transmitted to 36 through the idler.

Next, the relationship between the pinch rollers 45, 46 and the solenoid 147 that drives them will be explained.

FIG. 5 is a diagram supplementing this series, and the illustration in the figure shows the right part viewed from above and the left part viewed from directly below the bottom plate 3.

Here, the pinch rollers 45 and 46 are the pinch roller mounting plate 4.
7.48, and the same plate 47.48 is rotatably attached to the bottom plate 3 by pins 49.50.

51 to 54 are guide holes provided in the bottom plate 3, and 51.52 is L.
53.54 is a single character shape.

Pins 55 and 56 are provided on the pinch roller mounting plates 47 and 48 and protrude downward from the bottom plate 3 through guide holes 51 and 52. Pins 57 and 58 have one end fixed to the chassis plate 37 and are attached to the pinch roller through guide holes 63 and 54. Switching plate 59.60
a shaft rotatably mounted, 61. is pinch roller switching plate 5
9. The springs 62 and 63 provided between the springs 61 and 60 are pins provided on the moving plate 64 that moves between the solid line and dotted line in FIG. 5 each time the solenoid 147 operates.
Due to the action of the same pin 62°63, the pinch roller 45.4
6 selections are made.

(The solenoid 147 is assumed to be operated by a manual switch and a signal when the tape finishes running in one direction.

) Here, Fig. 5 A is in a non-performance state (corresponding to Fig. 1);
Figure 5 shows the playing state (corresponding to Figure 2), and Figure 5 shows the state in which the movable plate 64 is in the state shown by the solid line in Figure 5, pressing the pinch roller 46 against the capstan 34. 5C shows a state in which the movable plate 64 is in the state indicated by the dotted line in FIG. 5 and presses the pinch roller 45 against the capstan 33, and FIG. 5B shows a state in fast forwarding or rewinding. ing.

Now, when the movable plate 64 is in the state shown by the solid line in FIG. 5 and the chassis flat plate 37 moves from the non-performance state in FIG. 1 to the performance state in FIG. The pinch roller 45 hits the pin 62 and prevents the pin 55 from moving, creating a space between the pinch roller 45 and the capstan 33.

On the other hand, the pinch roller switching plate 60 is in a deviated position relative to the pin 63, and the tension of the spring 61 helps to press the pinch roller 46 against the capstan 34.

In this state, if the movable plate 64 moves in the direction of the dotted line in FIG. 5, the pinch roller 45 presses against the capstan 33 as shown in FIG.

The relationship between the pinch rollers 45 and 46 has been explained above, and next, the relationship between fast forwarding and rewinding according to 2 in FIG. 5 will be explained with reference to FIGS. 6 to 9.

In Figures 6 to 9, 147' is the solenoid shaft, 65
The pin 66 of the fast forward/unwind release lever engages with a long hole 67 provided in the bottom plate 3.

6°8°69 is a cam rotatably held on the bottom plate 3, and a cross-shaped guide hole 7 is provided in the bottom plate 3 between the cams 68 and 69.
has 0.

Reference numerals 71 and 72 are stoppers for pin-cum-preventing pieces 73 and 74 that hold the springs 40 and 41 shown in FIG. 1, and the preventing pieces 73 and 74 are rotatably held on the bottom plate 3.

7'5. a and 75 b are springs that pull the prevention pieces 73 and 74 in one direction; 75 c is a spring that pulls one end of the cam 68 in one direction; 16 to 78 are pins provided on the bottom of the chassis flat plate 31; is fitted.

In FIGS. 1 and 2, 77 is a pin for regulating the position of the chassis flat plate 37.

Here, Fig. 6 shows the non-playing state, Fig. 7 shows the playing state, Fig. 8 shows the fast-forwarding state, Fig. 9 shows when the solenoid 147 is operated during fast-forwarding, and Fig. 10 shows switching from fast-forwarding to rewinding. This figure shows the action of the prevention piece 73 at this time.

In FIG. 2, it has been explained that the chassis flat plate 37 is rotatable in the direction of arrow B only during the performance state, but the spring 40.
When the knob 39 is rotated in one direction against the tension of 1, the flat plate 37 rotates to the extent that its protrusion 38 can move within the guide hole 29 of the flat cam 25.26.

At this time, the pin 76 provided on the chassis flat plate 37 moves within the guide hole 70 while pressing the cam 68 or 69 in one direction, and is locked by the cam 68 or 69 by the action of the spring 75.

FIG. 8 shows the state in which the cam 68 is locked.

Here, the solenoid 147 operates, and the solenoid shaft 147
' is pulled, the fast forward/rewind lever 65 is moved to the pin 66.
The pin 76 is unlocked by the cam 68 in order to rotate the cam 68 at one end.

In this case, even if the pin 76 is locked to the cam 69, as explained in FIG.
8 rotates clockwise, and this causes the cam 69 to rotate counterclockwise, so the pin 76 is released from the cam 69 and is moved within the guide hole 70 by the action of the springs 40 and 41 as shown in FIG. Recover.

Now, when you are fast forwarding or rewinding as shown in Figure 8, if you want to turn the knob 39 in the opposite direction to rewind or fast forward, if you do that operation suddenly, one side of the tape will suddenly run in the opposite direction. Sometimes I end up cutting the tape.

Therefore, in order to prevent this, pin 77 is installed as shown in Figure 10.
When the pin 77 moves with the movement of the chassis flat plate 37 and reaches the position of the pin 77 shown by the dotted line, it is locked by the prevention piece 73 and further movement of the pin 77 is restricted.

In this case, once the playing state is returned from the time of fast forwarding or rewinding as shown in FIG. 7, the pin 77 or pin 78 becomes as shown in FIG. 7, and the change to rewinding or fast forwarding can be performed.

As described above with reference to the embodiments, according to the present invention, the cassette holders 4 and 5 corresponding to the side surfaces of the cassette are made independent, and the movement of the holders 4 and 5 is performed by flat cams 25 and 26, and furthermore, the head Since the plate to which the recorder 20 is attached is formed of a flat plate 37, it can contribute to making the recorder thinner.

In addition, the chassis flat plate 37 is designed to protrude forward only when playing, making it easy to determine whether or not a performance is being performed depending on the position of the knob 39 attached to the flat plate 37. Since the knob 39 is buried almost to the same level, it can contribute to safety.

Furthermore, during performance, the knob protrudes from the front of the recorder, making it easy to eject the recorder.

Further, the cams 25 and 26 are connected by a shaft 31, so that both the cassette holders 4 and 5 are moved synchronously.

Even when switching from fast forwarding to rewinding or from rewinding to fast forwarding using a knob 39, the tape in the cassette is not damaged because the switching can be performed after the playing state has been set once.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of a cassette tape recorder according to an embodiment of the present invention, FIG. 2 is a perspective view showing a partially operated (playing) state of the recorder, FIGS. 3 and 4 is a perspective view of a portion of the same recorder, FIG. FIG. 1.2...Side plate, 3...Bottom plate, 4,5
...Cassette holder, 6, 7... Pin, 8, 9... Long hole, 10... Pin, 1
1.12... Arm, 13-, 14...
...Shaft, 15, 16... Spring, 17, 1
8... Cassette detection piece, 20... Magnetic head, 21° 22... Hole, 23, 24...
... Part of the stopper, 25°26 ... Flat cam,
27...pin, 28...long hole, 29.
...L-shaped guide hole, 30 ...cam part,
31...Plate cam synchronization shaft rod, 32...
Motor, 33゜34... Capstan, 35,
36... Reel shaft, 37... Chassis flat plate, 38... Projecting piece, 39... Knob, 40, 41... Spring, 42...
・Mounting base, 44...Flywheel retaining plate, 4
5°, 46...Pinch roller, 47, 48...
...Pinch roller mounting plate, 49,50...
Pins, 51-54...Guide holes, 55, 56
・-・-pin, 57, 58...shaft, 59.60
...Pinch roller switching plate, 61...Spring, 62, 63...Pin, 64...
...Moving plate, 65...Fast forward rewind release lever, 66...Pin, 67...Elongated hole, 68
, 69...Cam, 70...Cross-shaped guide hole, 71, 72...Holding pin/stopper,
73.74...Prevention piece, 75a-75c...
... Spring, 76-78 ... Pin, 14
7... Solenoid.

Claims (1)

[Scope of Claims] 1. Two independent cassette holders that are movable up and down relative to both side plates, each having a cassette tip. two arms that rotatably support the base and are arranged in an X-shape as detection pieces; a spring that applies pressure to the arms so as to constantly push out the cassette inserted by the arms; two flat cams whose one side is always in contact and rotatable, and whose rotation is regulated by the arm when not playing, and which restricts the rotation of the arm when playing; means for synchronizing the movements of both the flat cams; and a means for following the movement of the flat cam and moving the corresponding cassette holder up and down, which is movable on a bottom plate that is integrally provided with the side plate, and has a head on one side and a knob on the other side; and a chassis flat plate that engages with the flat cam and follows the movement of the flat cam, a means for moving together with the chassis flat plate and controlling the positions of two pinch rollers corresponding to the two capstans, and a means for pinching during performance. It is equipped with a means for switching the crimping of the roller to the capstan, and a spring that always pulls the chassis flat plate toward the knob, and the arm is rotated by the cassette inserted into the cassette holder to lock the flat cam. By rotating and moving the cassette holder downward and protruding the chassis flat plate forward, it is set to the playing state, and by moving the chassis flat plate in the opposite direction, the cassette holder is moved upward through the child cam. A cassette type cheap record coater characterized in that an arm is unlocked so that a cassette inserted into a cassette holder can be ejected.