JPH0119257Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a loading mechanism for a tape cassette, and as loading is automated, the tape cassette and reel shaft are engaged and disengaged while the reel shaft is braked. Regarding the mechanism.

For example, in a front loading type cassette deck, when installing a tape cassette, first open the lid that covers the front of the cassette storage space using the eject button, drop the cassette inside the lid, and then close the lid by hand to place the cassette. However, loading mechanisms have now appeared that automate this hand-pushing operation by pressing a button. However, in this type of conventional autoloading mechanism, when the lid closes and the tape cassette engages with the reel shaft, the reel stand is usually braked, so the reel inside the tape cassette is free of play. The reel shafts may engage the reel shafts in a way that pulls the tape against each other, which not only gives unnecessary tension to the tape, but also increases the lid drive load when the cassette is installed. There was a drawback.
Also, when opening the lid and ejecting the tape cassette from the reel shaft, if the brake is applied to the reel stand while tension is applied to the tape, the lid driving load will become large and ejection will become impossible. It was hot.

The present invention eliminates the above drawbacks, and when the reel in the cassette engages and disengages from the reel shaft as the tape cassette is lead-in or ejected, the brake on the reel stand is kept in a released state. An object of the present invention is to provide a loading mechanism for a tape cassette that allows a reel of the cassette to be smoothly engaged and disengaged from a reel shaft.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an embodiment of a cassette deck to which the loading mechanism of the present invention is applied, FIG. 2 is an exploded perspective view of an embodiment of the loading mechanism, and FIGS. 3A and 3B are loading control cams. A cam diagram for explaining the cam shapes of the front and back surfaces of the wheel is shown.

In Fig. 1, the cassette deck 1 is of a front-loading type and has all electronic operation buttons. Following the lead-in operation, recording, playback, fast forward, and rewind operations can be performed as a series of operations, and by pressing the eject button 6, the eject operation can be performed as a series of operations following the stop of tape running. It has the characteristic that it can be

The loading mechanism 7, as shown in FIG. Operations such as pressure welding are performed using four cam grooves 14-8, two cam grooves carved on the front and rear sides of the loading control cam wheel 14, shown in FIGS. 3A and 3B.
14-11, 14-12, and 14-13 according to a predetermined sequence. The cam wheel 14 is driven in forward and reverse rotation by a loading motor 16 provided separately from the capstan drive motor 15, and rotates approximately 360 degrees from the start to the end of loading.

Now, the operation when loading from a state where the lid 8 is open (ejected state) will be explained, taking as an example the case where the playback button 3 is pressed. First, the loading motor 16 rotates forward by pressing the playback button 3, and the rotation is transmitted to the cam wheel 14 via the pulley 17 and pinion 17a. Cam groove 14 for lid opening/closing carved on the back of the cam wheel 14
-8 is engaged with a pin 18a implanted at one end of the swing lever 18, and as the cam wheel 14 rotates, the other end of the swing lever 18 rotates clockwise. An engaging element 19a of a slider 19 provided on the left end of the frame 9 so as to be able to rise and fall is engaged with the other end of the swing lever 18.
As the slider 8 rotates clockwise, the slider 19 is upwardly displaced.

Here, a pin 20a implanted in the upper arm of a doglegged arm 20 that is pivotally supported on the side plate of the frame 9 is engaged with the slider 19, and a long hole 20b at the lower end of the doglegged arm 20 is engaged with the slider 19. A pin 8a on the side of the lid 8 is engaged. Therefore, as the slider 19 rises, the lower end of the doglegged arm 20 is retracted to the rear, and the lid 8 rotates in the closing direction around the pivot pins 8b at the lower ends of both ends.

By the above lead-in operation, the reel shaft 11a is inserted into the reel of the tape cassette, and the capstan 21, which is coaxially and directly connected to the capstan drive motor 15, is inserted through the capstan insertion hole of the tape cassette.This will be explained below. Thus, the operation of the brake 22 for braking the reel base is devised so that the reel shaft 11a and the reel of the tape cassette can be engaged without any trouble.

The brake 22 for braking the reel stand is a pair of L-shaped levers 2 pivoted below each reel stand 11.
Attach a rubber pad 23a to one end of the lever 23, loosely fit the other ends of the lever 23 into the connecting pin 24,
Further, one end portion of both levers 23 is biased by a tension spring 25 in a direction toward each other. The connecting pin 24 is locked to the upper surface of one end of a rotating lever 26 that is pivotally supported on the back surface of the motor chassis 10.
A guide pin 26a installed at the other end of the rotary lever 26 engages with a reel stand braking cam groove 14-11 on the back surface of the cam wheel 14. Therefore, as the rotating lever 26 rotates clockwise about its pivot pin 26b, the connecting pin 24 is allowed to move downward, and as a result, both levers 23 are moved by the force of the spring 25. The rubber pad 23a is the reel stand 11
Rotate in the direction in which it comes into contact with.

The reel stand 1 due to the rotation of the lever 23
The braking for 1 is as shown in Fig. 3A and B.
This is performed when recording/playback is completed and when fast forwarding/rewinding is completed, and excess rotation due to the inertia of the reel stand 11 is forcibly braked. More precisely, the brake 22, including the brake applied to the stopped reel stand 11, is used for recording purposes. It operates once before and after playback, and once before and after fast forward/rewind.

By the way, except for these cases, cam groove 1
As is clear from the shape of 4-11, brake 2
2 is in the brake release state, but especially when the lead-in or ejection is performed with the opening/closing operation of the lid 8, in other words, the cam groove is It is important that the brake 22 is released due to the shape of 14-11.

That is, for example, when the reel shaft 11a engages with the reel of the tape cassette at the end of the operation during lead-in, the shape of the tip of the reel shaft 11a and the shape of the shaft insertion hole of the reel may not coincide with each other. However, since the reel shaft 11a is freely rotatable, it can be rotated to the alignment position when the reel shaft 11a engages with the reel. Therefore, the inconvenience of being forcibly engaged with the reel shaft 11a while the reel side is under tape tension does not occur.

Furthermore, even when ejecting, before the operation starts, the brake 22 is in the released state and the reel shaft 1
Since the reel 1a is allowed to rotate freely, there is no problem such as being forcibly removed from the reel shaft 11a while the reel is under tape tension.

In this manner, the loading mechanism 7 configured as described above has the actuation timing of the brake 22 set at the desired timing described above by the reel base braking cam groove 14-11 of the cam wheel 14, so that the reel axis The engagement and disengagement between the tape cassette 11a and the tape cassette can be carried out extremely smoothly while the brake on the reel stand 11 is released.

As explained above, according to the tape cassette loading mechanism of the present invention, the tape cassette and the reel shaft are engaged and disengaged while the reel is released from the reel. The reel shaft can be engaged with the reel shaft in a consistent manner, thereby preventing the inconvenience of forcibly leading in the tape cassette while creating tape tension, and also preventing the tape cassette from separating from the reel shaft. This provides excellent effects such as being able to eject the tape cassette with ease.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of a cassette deck to which the loading mechanism of the present invention is applied, FIG. 2 is an exploded perspective view of an embodiment of the loading mechanism, and FIGS. 3A and 3B are loading control cams. FIG. 3 is a cam diagram for explaining the cam shapes of the front and back surfaces of the wheel. 1... Cassette deck, 7... Loading mechanism, 8... Lid, 11... Reel stand, 11a...
Reel shaft, 14...Cam wheel, 14-11...
...Cam groove for reel stand braking, 22...Brake, 2
3... Lever, 24... Connection pin, 25... Tension spring, 26... Rotating lever.

Claims (1)

[Scope of utility model registration request] A cam wheel for loading control that allows the tape to continue running after the lead-in of the tape cassette, or to eject the tape cassette after the running tape has stopped, and a reel stand brake that brakes the reel stand before and after tape running. and a reel base braking cam of the loading control cam wheel which is linked to the reel base braking brake and controls the brake, and during the lead-in and eject operations of the tape cassette. A loading mechanism for a tape cassette, wherein the brake for braking the reel base releases the brake on the reel base and allows free rotation so that the reel shaft can engage and disengage from the reel of the tape cassette in a consistent manner.