JPS6120697Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cassette type recording and reproducing device, and in particular, a cassette containing a recording tape is inserted into a cassette holder, and the cassette holder is moved forward to place the cassette in a predetermined position in the main body of the device. The present invention relates to a cassette type recording and reproducing apparatus which is mounted on a cassette at a mounting position, and the recording tape is pulled out from the cassette by a tape pull-out means and mounted on a predetermined tape running path for recording and/or reproduction.

For example, in a cassette-type VTR (video tape recorder), a magnetic tape wound and stored in a cassette is pulled out by a tape pulling means such as a loading ring and mounted on a predetermined tape running path. In this state, the magnetic tape is run and brought into contact with the rotating magnetic head to record and reproduce video signals. Therefore, the cassette must be ejected only after the magnetic tape that has been pulled out is pulled back into the cassette. This is because if the cassette is ejected with the magnetic tape pulled out, not only the magnetic tape but also the tape guide mechanism inside the VTR body will be damaged.

Therefore, conventional VTRs are constructed so that if the magnetic tape is not pulled back into the cassette, no eject operation is performed even if the eject button is pressed. However, this configuration has the disadvantage that it is necessary to press the eject button again after the magnetic tape is pulled back, resulting in a lack of operability. Therefore, a mechanism has been proposed in which the pressing operation of the eject button is recorded in an electric circuit, and when the magnetic tape has been pulled back, the plunger is actuated based on the memory to eject the cassette. However, such a mechanism requires an electric storage means and a plunger, which not only increases the size of the device but also makes the VTR expensive.

The present invention has been developed in view of these problems, and it can significantly improve operability, eliminates the need for electrical memory means, plungers, etc., and eliminates the need for the eject operation of the eject operation member. It is an object of the present invention to provide a cassette type recording/reproducing device that requires little force and can protect the recording tape extremely reliably.

An embodiment in which the present invention is applied to a VTR will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, a fulcrum pin 2 is implanted in the chassis 1 of this VTR, and an eject lever 3 is rotatably supported by the fulcrum pin 2. The eject lever 3 is formed in an L-shape, and an eject button 4 is fixed to one end thereof. This eject button 4
It protrudes from the outside of the VTR's control panel. The other end of the eject lever 3 is connected to a connecting link 6 via a pin 5. A bending piece 7 is integrally formed on the connecting link 6, and a hold lever 9 is rotatably supported on the bending piece 7 via a pin 8. This hold lever 9 is urged to rotate counterclockwise about the pin 8 in FIG. 1 by a torsion spring 10. A hook portion 11 is formed at the tip of this hold lever 9, and this hook portion 11 is connected to a hold pin 1 attached to the bottom of the cassette holder 12.
It is now possible to engage with 3. Further, a coil spring 15 is stretched between the link 6 and a spring hook 14 fixed to the chassis 1. This coil spring 15 biases the ejector lever 3 to rotate in a counterclockwise direction, that is, in a backward direction, about the pin 2 in FIG. 3 via a link 6.

The other end of the link 6 is connected to a charge lever 17 via a pin 16. Charge lever 17
is rotatably supported by a pin 18 embedded in the chassis 1. Further, an actuation lever 19 is rotatably supported with respect to the chassis 1 by a pin 18 . And this operating lever 19
The bent piece 22 of the charge lever 17 and the bent piece 21 of the charge lever 17
A charge spring 20 is stretched between the two.
Further, a lock lever 23 is arranged on the side of the charge lever 17. This lock lever 23
is rotatably supported by a U-shaped mounting plate 24 fixed to the chassis 1 via a pin 25. A hook-shaped lock portion 26 of the lock lever 23 is configured to be able to engage with a lock pin 27 provided at the bottom of the cassette holder 12. Further, a roller 28 is attached to the lock lever 23, and this roller 28 can be pressed by the bent piece 22 of the operating lever 19. Further, the lock lever 23 is urged to rotate clockwise about the pin 25 in FIG. 1 by a coil spring 29.

A control lever 30 is attached to the side of the operating lever 19.
are arranged. This lever 30 is rotatably supported with respect to the chassis 1 by a pin 31. A protrusion 32 is provided at one end of this lever 30.
are connected together. This protrusion 32 is configured to be able to come into contact with a pin 33 implanted at one end of the operating lever 19. A pin 34 is implanted at the other end of the control lever 30, and is inserted into a recess 35 of a cam 35 during unloading of the magnetic tape. The cam 35 is rotatably supported by a pin 37, and an arm 38 integrally connected to the cam 35 has a loading ring 39 for pulling out the magnetic tape in the cassette.
It is placed in a groove 40 formed on the bottom surface of the.

Next, cassette 4 of this VTR with the above configuration.
The operation of eject 1 will be explained. Cassette 41
As shown in FIG. 1, the cassette holder 12 is inserted into the cassette holder 12, and the cassette holder 12 is moved forward to the lower position, and the cassette 41 is installed at the cassette installation position of the VTR main body. In this state, the cassette holder 12 is attached to the locked pin 2.
7 and a lock lever 23.

When all the magnetic tapes in the cassette 41 are pulled back into the cassette 41,
The cassette 41 is immediately ejected by operating the eject button 4. That is, when all the magnetic tapes are pulled back into the cassette, the loading ring 39 moves counterclockwise as shown in FIG. 39 into the groove 40. For this purpose, the control lever 30 is rotated clockwise about the pin 31 by the coil spring 42, as shown in FIG. Therefore, the protrusion 32 of the lever 30 is not opposed to the pin 33 of the operating lever 19, and the operating lever 19 is in a rotatable state.

When the eject button 4 is pressed in this state, the eject lever 3 rotates clockwise in FIG. 4 about the pin 2. This rotation of the lever 3 is transmitted to the charge lever 17 via the link 6, and the charge lever 17 rotates counterclockwise in FIG. 4 about the pin 18. Then, the rotation of the lever 17 is transmitted to the operating lever 19 by the coil spring 20, and this lever 19 also rotates counterclockwise. Therefore, the bent piece 22 of the lever 19 presses the roller 28 of the lock lever 23, causing the lock lever 23 to rotate counterclockwise in FIG. 1 about the pin 25. For this purpose, the hook portion 26 of the locking lever 23 and the locked pin 2
7 is released, the cassette holder 12 is moved upward by a biasing means (not shown), and the cassette 41 in the cassette holder 12 is ejected.

Next, with the magnetic tape in the cassette 41 mounted on the tape running path, press the eject button 4.
Define the behavior when is pressed. In this case, the pressing operation of the eject button 4 is once mechanically held, and the loading ring 39 moves back to eject the cassette 41 when all the magnetic tapes are rewound into the cassette 41. It's getting old.

That is, when the magnetic tape is being pulled out from the cassette 41 as shown in FIG. 5, the loading ring 39 is in a clockwise forward rotation state;
Therefore, the arm 38 of the cam 35 is in contact with the inner peripheral surface of the loading ring 39. Therefore cam 35
is rotated clockwise about the pin 37, and the pin 34 of the control lever 30 is in contact with the outer circumference of the cam 35. For this purpose, the control arm 30
The protrusion 32 faces the pin 33 of the actuating lever 19. That is, the operating lever 19 is in a state where it can be prevented from rotating counterclockwise by the protrusion 32 .

When the eject button 4 is pressed in this state, the eject lever 3 rotates clockwise in FIG. 5 around the pin 2.
5 to the charge lever 17, and the charge lever 17 rotates counterclockwise in FIG. 5 about the pin 18. And this lever 1
7 is rotated by the actuating lever 9 via the coil spring 20.
However, since the operating lever 19 is prevented from rotating by the protrusion 32 as described above,
As a result, the coil spring 20 is expanded by the rotation of the charge lever 17, and elastic energy is stored in the spring 20. Marani eject button 4
When the link 6 moves due to the pressure of
3 and engages with this pin 13. For this reason, the eject button 4 is held in a pressed state, and the charge lever 17 is also held in a counterclockwise rotated state. Therefore, the charge spring 20 is also stretched and the elastic energy is held in a charged state.

When the loading ring 39 moves back in this state, the arm 38 of the cam 35 enters the groove 40 of the loading ring 39, thereby causing the cam 35 to rotate counterclockwise as shown by the arrow in FIG. The recess 36 of the cam 35 receives the pin 34 of the control lever 30, as shown in phantom in FIG. Therefore, the control lever 30 is connected to the pin 3
The protrusion 32 of this lever 30 rotates clockwise in FIG.
9 to a position where it does not face the pin 33. Therefore, at this moment, the operating lever 19 rotates about the pin 18 as shown by the imaginary line in FIG. Coro 28
Press. As a result, the lock lever 23 rotates counterclockwise about the pin 25 in FIG.
The cassette holder 12 is moved upward and the cassette 41 is ejected. Further, as the cassette holder 12 moves upward, the pin 13 of the cassette holder 12 separates from the hook portion 11 of the hold lever 9, and the hold on the eject button 4 is also released.

Although the present invention has been described above with reference to embodiments, the present invention is not limited to the above-mentioned embodiments, and various modifications can be made based on the technical idea of the present invention.

For example, in the above embodiment, the present invention is applied to a VTR, but the present invention can also be applied to a tape recorder that performs recording and playback by pulling out a magnetic tape from a cassette.

Since the present invention is constructed as described above, when the eject operation member is operated forward while the recording tape is being pulled out, the cassette is automatically ejected when the recording tape has been pulled back. Therefore, the operability can be significantly improved.

Furthermore, the eject operation of the eject operation member is mechanically memorized by a charge spring, and therefore no electrical memorization means or plunger is required, which makes the device extremely simple. can.

Furthermore, the charge spring, which is elastically deformed and charged by the forward movement of the eject operating member, needs only to be charged with enough force to move the holder locking means forward to release the lock of the cassette holder. Since there is no need to charge force for backward movement, the operating force required for ejecting the eject operating member may be very small.

Further, the eject operation member is locked in its forward movement position by engaging the operation member locking means with a lock portion provided on the cassette holder, and the eject operation member is locked in its forward movement position by the return movement of the cassette holder. The eject operating member is configured to move back when the operating member locking means is unlocked. Therefore, even if you try to perform the same operation again immediately after moving the ejector operating member forward, the next forwarding operation of the ejector operating member will not be accepted until the recording tape is stored in the cassette and the cassette holder moves back. Therefore, the recording tape can be protected extremely reliably, and in particular, it is possible to extremely effectively prevent the tape from being pulled out again while the recording tape is being pulled back into the cassette.

[Brief explanation of the drawing]

The drawings show an embodiment in which the present invention is applied to a VTR, in which Fig. 1 is a vertical sectional view of essential parts of this VTR, Fig. 2 is an exploded perspective view of the same, Fig. 3 is a plan view of the same, and Fig. 3 is a plan view of the same. Figure 4 is a plan view showing the operation when the eject button is pressed with the tape being pulled back;
FIG. 5 is a plan view showing the operation when the eject button is pressed in a state where the tape is not pulled back. In addition, in the symbols used in the drawings, 3...
...Eject lever (Eject operation member), 4
... Eject button, 9 ... Hold lever (operation member locking means), 12 ... Cassette holder, 1
3... Hold pin (lock part), 17... Charge lever, 19... Operating lever, 20... Charge spring, 23... Lock lever (holder locking means), 27... Locked pin, 30... Control lever (unlocking) prohibited means), 39...loading ring, 41...cassette.

Claims (1)

[Claims for Utility Model Registration] Inserting a cassette containing a recording tape into a cassette holder, moving the cassette holder forward to attach the cassette to a predetermined device position in the main body of the device, and tape pulling means. In a cassette-type recording and reproducing apparatus in which the recording tape is pulled out from the cassette and mounted on a predetermined tape running path for recording and/or reproduction, a reciprocating operation is performed to eject the cassette. an eject operating member arranged to be reciprocally movable and biased in the backward movement direction; A holder lock means that releases the lock by forward movement; and a space between the eject operation member and the holder lock means so that the forward movement of the eject operation member delays the holder lock means by the forward movement of the eject operation member. a charge spring interposed in the cassette; a lock release inhibiting means for prohibiting the forward movement of the holder locking means until the tape is stored in the cassette; a lock portion provided on the cassette holder; an operating member locking means that moves forward in conjunction with the forward movement of the eject operating member in the forward movement state of the holder, thereby engaging the lock portion and locking the eject operating member in the forward movement position; When the eject operation member is operated forward while the recording tape is being pulled out from the cassette, the operation member lock means moves forward and engages with the lock portion, thereby ejecting the eject operation member. When the eject operating member is locked in its forward movement position and the charge spring is charged by elastic deformation, and the recording tape is stored in the cassette in this state, the prohibition by the lock release prohibition means is released. As the holder locking means moves forward due to the elastic restoring force of the charge spring, the cassette holder is unlocked by the holder locking means, and as a result, the cassette holder moves back and locks the cassette. The ejecting is performed, and the locking portion of the operating member locking means is unlocked by the locking portion due to the backward movement of the cassette holder, so that the eject operating member is configured to move back. A cassette type recording and reproducing device.