JPS629536Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a cassette tape player that automatically starts and starts playback operation when a cassette is loaded, and which starts playback operation after removing slack from the tape in the cassette half. This invention relates to a slack removing device.

For example, a cassette car stereo tape player automatically starts and begins playing upon loading a tape cassette. Most of the conventional tape players of this type employ a method in which the tape is pressed against the capstan using a pinch roller in the same manner as when loading a cassette, and the winding operation is started using a pair of reel stands. However, with this conventional method, when a cassette is loaded with slack in the tape inside the cassette half and playback starts, the reel stand rotates until the slack is taken up. There was a risk that the tape might get caught in the capstan or pinch roller during this process. In order to prevent this, measures have been taken to increase the free rotation speed of the reel stand so that the reel can be wound in a short time, but this method lacks reliability.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tape player that automatically starts up and starts playing when a cassette tape is loaded, and to provide a loading method that reliably removes slack in the tape.

Hereinafter, the present invention will be specifically explained based on an embodiment shown in the drawings.

The tape slack removing device of this embodiment includes a take-up reel stand 1, an unwind reel stand 2, a head stand 3, a stopper 4, a driven piece 5, a first arm 6, a second arm 7, a cam 8, and a first gear. 9 and a second gear 10.

The take-up reel stand 1 and the unwind reel stand 2 are
They are supported by a frame 11 in pairs, and the tape in a cassette (not shown) is wound up from the unwinding reel stand 2 side by the rotational force of the take-up reel stand 1.

The head stand 3 is biased by a tension spring 23, is attached to the frame 11 so as to be movable forward and backward, and supports the head 12 at its center. The pinch roller 13 is supported by the frame 11 by an arm 14 and a support shaft 15, is biased clockwise by a spring 16, presses against the capstan 17 when the head stand 3 enters, and pinches the tape. The head stand 3 is stably locked in three positions: a play position A, a fast forward/rewind position B, and an eject position C, as shown in FIG.

The first arm 6 is connected to the frame 11 by a pin 18.
is rotatably supported by a tension spring 19.
It is energized counterclockwise by a stopper 4 and a driven piece 5 in a part thereof. This stopper 4 hits the locking part 3a of the head of the head stand 3 at the position rotated counterclockwise, and prevents the head stand 3 from entering, and the driven piece 5 is paired with the cam 8. The first arm 6 is provided integrally with the first arm 6 at the position shown in FIG. Further, the second arm 7 is rotatably attached to a support shaft 20, and has a tension spring 21.
It is biased clockwise by the locking tab 7a, and engages with the engaging portion 3b of the head stand 3 by the locking pawl 7a at its tip. The cam 8 and the first gear 9 are rotatably mounted on the second arm 7 by a rotating shaft 22, and are fixed to each other. This first gear 9 is meshed with a second gear 10. The second gear 10 is fixed to the unwinding reel stand 2 and rotates together with the rotation of the unwinding reel stand 2.

Next, the operation will be explained. First, when a tape cassette is loaded in a predetermined position, the take-up reel stand 1 begins to rotate counterclockwise. At this time, head stand 3
cannot move forward because it is blocked in the advancing direction by the stopper 4 as shown in FIG. During this time, if there is slack in the tape, the take-up reel stand 1 winds up the tape corresponding to the slack. At this time, the rewind reel stand 2 is stopped. When the slack in the tape is eliminated, the unwinding reel stand 2 rotates counterclockwise as the tape being wound runs. This rotation of the rewind reel stand 2 is transmitted from the second gear 10 to the first gear 9, so the first gear 9 rotates clockwise. And this first
The clockwise rotation of the gear 9 is directly transmitted to the cam 8. Here, the cam 8 rotates clockwise, and pushes the driven piece 5 upward in the figure at the time of approximately one rotation. Therefore, the first arm 6 rotates clockwise around the pin 18,
As shown in FIG. 3, the stopper 4 is moved to a position where it is released from the locking portion 3a of the head stand 3. This results in
The head stand 3 is immediately moved forward by being pulled by the tension spring 23, and the pinch roller 1 is attached to the capstan 17.
3 and proceed to normal playback operation. At this time, the engaging portion 3b of the head stand 3 hits the locking pawl 7a of the second arm, so the second arm 7
Since the first gear 9 rotates counterclockwise against the tension of the pull spring 21, the first gear 9 becomes separated from the second gear 10 and is displaced to a position where it is not affected by the rotation of the rewind reel stand 2. In this way, the stopper 4 of the first arm 6 is attached to the head stand 3 only at the eject position C.
Since it hits the head of the head and prevents the head stand 3 from entering, it will not lock unless it is ejected. When the head stand 3 is ejected and moved backward, the first gear 9 and second gear 10 are engaged again to prepare for the next loading operation.

As described above, in the present invention, the take-up reel stand absorbs the tape slack while the head stand is prevented from entering, and then the unwind reel stand is forcibly driven using the tape as a conductive medium, and this driving force is used to forcibly drive the rewind reel stand. The cam and the driven piece are operated to displace the first arm to release the lock on the head stand from entering, and the normal playback operation is started only after the slack has been absorbed. This prevents the rotating parts from getting caught in the tape, and in particular, the rotation of the rewind reel stand always starts after absorbing the slack in the tape, and then the head stand enters, so the slack in the tape can be prevented. It will definitely be removed. Such a tape slack removing device is effective when incorporated into, for example, a tape player of a cassette car stereo.
In addition, this device does not use a plunger or the like as a driving part, and uses the rotational force of the motor for driving the take-up reel stand, so no special driving means is required, simplifying the configuration. appropriate to do so.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the tape slack removing device of the present invention, FIG. 2 is a side view of the gear section, and FIG. 3 is a partial plan view showing the positional relationship of the head stand. DESCRIPTION OF SYMBOLS 1... Take-up reel stand, 2... Unwind reel stand, 3... Head stand, 4... Stopper, 5... Follower piece, 6... First arm, 7... Second arm, 8
...Cam, 9...1st gear, 10...2nd gear.

Claims (1)

[Scope of Claim for Utility Model Registration] A take-up reel stand that is driven to rotate as a cassette tape is loaded, a rewind reel stand, a capstan that is rotated together with the take-up reel stand as the cassette tape is loaded, and a head. a head stand to which a biasing force is applied in the forward direction; a pinch roller that is pressed against the capstan as the head base moves forward; a stopper that holds the head base in its retreated position against the biasing force; and a release means for operating the stopper in response to the rotational force of the rewind reel stand to release the holding state of the head stand in the retracted position, and the take-up reel stand rotates in response to loading of the cassette tape. The tape is pulled, and as the rewind reel base is rotated by the tension of the tape, the release means releases the head stand from being held in the retracted position by the stopper, and moves the head stand forward and releases the head stand from the capstan. A tape slack removing device characterized by having a pinch roller in pressure contact.