JPH0640407B2 - Cassette slider-opening / closing mechanism - Google Patents

Description

TECHNICAL FIELD The present invention relates to a slider opening / closing mechanism for a cassette, which is applied to a digital audio tape recorder or the like.

SUMMARY OF THE INVENTION The present invention is a slider opening / closing mechanism for a cassette, in which a slider is moved within the cassette holding tray by moving the cassette holding tray at a timing slightly delayed after the slide lever starts moving. The opening / closing operation of is automatically performed.

[Prior Art] A slider opening / closing mechanism in a conventional R-DAT (digital audio tape recorder) or the like uses the force of inserting / drawing a cassette into / from a cassette holding tray to open / close the slider. This is done by removing the lock on the slider.

[Problems to be Solved by the Invention] However, with such a conventional slider opening / closing mechanism, a mechanism for detecting whether or not the slider is locked in the open state is required when the cassette is inserted, and the cassette is removed. At times, the cassette and the slider may be pulled out while being sandwiched by hand, and as a result, there is a problem that it is easy to perform an erroneous operation such as a high possibility of pulling out the cassette while the slider is open and locked.

The present invention has been made to address such a problem, and an object of the present invention is to provide a slider mechanism for a cassette that automatically opens and closes the slider within the cassette holding tray.

[Means for Voting Problems] To achieve the above object, the present invention provides a loading guide frame having a horizontal guide groove and an L-shaped guide groove on a side plate, and the L-shaped guide disposed in the loading guide frame. A cassette holding tray having a first guide pin on a side plate that slidably engages with the groove, and is disposed between the loading guide frame and the cassette holding tray and slidably engages with the horizontal guide groove. A slide lever having a second guide pin and having a pressing piece for pressing the cassette holding tray or the end of the cassette, and a slide arm for giving a moving force to the slide lever by pressing the second guide pin. And a moving stroke amount of the slide lever along the horizontal guide groove is equal to a horizontal moving stroke along the L-shaped guide groove of the cassette holding tray. The feature is that it is set to be larger than the stake amount by the stalk amount required for opening and closing the slider of the cassette.

[Operation] The cassette holding tray can be moved by the slide lever at a timing slightly delayed after the slide lever starts moving. Therefore, the opening / closing operation of the slider can be automatically performed in the cassette holding tray.

[Embodiment of the Invention] FIGS. 1 and 2 are a side view and a front view showing a slider opening / closing mechanism of a cassette according to an embodiment of the present invention. Horizontal guide grooves 7A, 7B and L-shaped guide grooves 7a, 7b are formed on a side plate. And a cassette holding tray 3 having side plates having first guide pins 3A and 3B slidably engaged with the L-shaped guide grooves 7a and 7b. Are placed. A cassette pack 4 is inserted into the cassette holding tray 3.

Further, when the cassette pack 4 is inserted into the tray 3, the front end of the slider 4a engages with the front end protrusion of the tray 3.

In addition, the loading guide frame 7 and the cassette holding tray 3
And a second guide pin 1A, 1B slidably engaged with the horizontal guide groove 7A, 7B, and a pressing piece for pressing the end of the cassette holding tray 3 or the cassette 4. A slide lever 1 having 1a, 1b is arranged. Reference numeral 2 denotes a slide arm, and a third guide pin 2A provided at an end of the slide arm engages with a cam groove 6A of a cam gear 6, and the cam gear 6 meshes with a loading arm gear 5.
When the loading arm gear 5 is driven by this, the cam gear 6 rotates and the slide arm 2
The third guide pin 2A is guided by the cam groove 6A and rotates clockwise about the pin 2B in FIG. As a result, since the recess 2C at the tip of the slide arm 2 is engaged with the second pin guide 1A, the pin 1A
Horizontal guide groove 7 for slide lever 1 via
It operates so as to give a moving force in the clockwise direction along A and 7B.

At this time, the moving stroke amount of the slide lever 1 is controlled by the pattern of the cam groove 6A of the cam gear 6, and when the cassette holding tray 3 is horizontally moved along the L-shaped guide grooves 7a and 7b, the slider stroke of the cassette is larger than this moving stroke amount. It is set to increase the stroke amount required for opening and closing.

With the above configuration, the pressing piece 1a or 1b of the slide lever 1 is moved to the cassette holding tray 3 at a timing slightly delayed after the slide lever 1 starts to move.
Alternatively, by pushing the end portion of the cassette pack 4, the cassette holding tray 3 also moves in the clockwise direction along the L-shaped guide grooves 7a and 7b. As a result, the slider 4a is pressed by the tray 3 for a short time to unlock and open the slider 4a, so that the slider opening / closing operation is automatically performed in the cassette holding tray 3, which may be caused by an erroneous operation by the user. It is possible to prevent a malfunction of opening and closing the slider.

Although the slide lever 1 and the slide arm 2 are provided on both side plates in FIG. 2, they may be provided on at least one side. Further, although an example in which the timing and stroke amount of the slide arm 2 and the loading arm gear 5 are controlled by the cam gear 6 is shown, the cam gear 6 serves as a cutting gear and the timing with the loading arm gear 5 is used to adjust the slide arm 2 and the sliding arm 2. The slide lever 1 may be driven by integrating with the cam gear 6. Further, the slide lever 1 may be configured such that the portion for pushing the cassette pack 4 is not integrated in the front and rear, and is divided into two portions on the left and right sides with respect to the cassette pack 4 in FIG.

EFFECTS OF THE INVENTION As described above, according to the present invention, the cassette holding tray is moved by the slide lever at a timing slightly delayed after the start of the movement of the slide lever. Can be prevented.

[Brief description of drawings]

1 and 2 are a side view and a front view showing a slider opening / closing mechanism of a cassette according to an embodiment of the present invention. 1 ... Slide lever, 1a, 1b ... Pressing piece, 1A, 1B, 2A, 3A, 3B ... Guide pin, 2 ... Slide arm, 2B ... Pin, 2C ... Concave, 3 ... Case holding Tray, 4 ... Cassette pack, 5 ... Loading arm gear, 6 ... Cam gear, 6A ... Cam groove, 7 ... Loading guide frame, 7A, 7B ... Horizontal guide groove, 7a, 7b ... L shape Guide groove.

Claims (1)

[Claims] 1. Horizontal guide grooves (7A), (7B) on the side plate.
And a loading guide frame (7) having L-shaped guide grooves (7a) and (7b), and slidably engaged with the L-shaped guide grooves (7a) and (7b) arranged in the loading guide frame (7). The horizontal guide is arranged between the cassette holding tray (3) having the first guide pins (3A) and (3B) that fit together on the side plate, and the loading guide frame (7) and the cassette holding tray (3). To have a second guide pin (1A), (1B) slidably engaged with the groove (7A), (7B) and for pushing the end of the cassette holding tray (3) or cassette (4) Slide lever (1) having pressing pieces (1a) and (1b), and a slide arm (2) that gives a moving force to the slide lever (1) by pressing the second guide pins (1A) and (1B). ) And the horizontal guide The movement stroke amount of the slide lever (1) along (7A) and (7B) is larger than the horizontal movement stroke amount along the L-shaped guide grooves (7a) and (7b) of the cassette holding tray (3). A cassette slide opening / closing mechanism, which is set to increase the stroke amount required to open / close the slider.