JPH0516096B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an eject operation mechanism employed in recording/reproducing apparatuses such as tape players, video tape recorders, digital audio tape recorders, compact disk players, and the like.

[Prior Art] In recent years, recording/reproducing devices such as tape players have been known to have a tape pack inserted into the device in a horizontal direction through a tape pack insertion slot provided on an operation panel (hereinafter referred to as an escutcheon) on the front of the device. A horizontal loading method in which the material is transported downwards is mainly used. Further, a dustproof door which is normally closed is rotatably provided in the tape pack insertion slot. On the other hand, the escutcheon is equipped with various operation button indicators including an eject operation button for ejecting the tape pack loaded inside the apparatus.

[Problems to be Solved by the Invention] Incidentally, the above-mentioned escutcheon tends to have a smaller area due to the miniaturization of recording/reproducing devices.
The operation buttons provided on the escutcheon had to be small due to the multifunctionality of the device.

Therefore, erroneous operations often occur due to the reduced size of the operation buttons.

The purpose of the present invention is to eliminate the above-mentioned problems and to
It is an object of the present invention to provide an eject operation mechanism that can secure sufficient operation button space in an escutcheon even when a playback device is made smaller and more multifunctional.

[Means for solving the problem] The eject operation mechanism according to the present invention is provided with a switch that detects rotation of the dustproof door in the opening direction,
The gist of the present invention is to include an eject drive circuit that drives an eject motor upon detection of the switch.

[Example] Examples of the present invention will be described below in order with reference to FIGS. 1 to 5.

FIG. 1 is a circuit diagram showing an embodiment of the present invention.

In the figure, 1 is a loading completion switch, which turns on when the tape pack is loaded to a predetermined recording/playback position, and turns on the power supply (hereinafter referred to as Vcc).
is supplied to one input terminal of the AND circuit 3. Further, a dustproof door switch 2 is interposed between this Vcc and the AND circuit 3, and is turned on when the dustproof door is rotated in the opening direction. The AND circuit 3 outputs high (H) to the T terminal of the one-shot multivibrator 4 when both the loading completion switch 1 and the dustproof door switch 2 are turned on. The one-shot multivibrator 4 outputs a single pulse of a predetermined time to the CK terminal of the flip-flop 5 in the next stage in response to the H output of the AND circuit 3. Then,
The terminal of flip-flop 5 outputs high (H), turns on switching transistor 6, and drives eject motor 7. When the tape pack is ejected to the tape pack insertion slot by the drive of the eject motor 7, an ejection completion switch 8 is activated.
is turned on and Vcc is input to the CL terminal of the flip-flop 5, the eject motor 7 stops driving.

That is, when the dustproof door switch 2 is turned on with the tape pack in the recording/reproducing position, the eject motor 7 is driven until the eject completion switch 8 is turned on, and the tape pack is ejected.

FIG. 2 is a circuit diagram showing another embodiment of the present invention. The difference from the example shown in FIG. 1 is that the dust-proof door switch 2a is turned ON when it is turned in the opening direction; The circuit configuration is the same as that of FIG. 1 except that an inverter 9 is interposed between it and the AND circuit 3. Therefore, when the dustproof door rotates in the opening direction with the tape pack in the recording/playback position, the AND circuit 3 outputs (H), and the eject motor 7 is driven until the eject completion switch 8 is turned on. The tape pack is ejected.

3a and 3b are sectional views showing a dustproof door and a dustproof door switch corresponding to FIG. 1.

Inside a tape pack insertion opening 11 provided in the escutcheon 10, a dustproof door 12 having a protrusion 12a on the front surface and an interlocking arm 1 are rotatably supported. This interlocking arm 13 is prevented from rotating counterclockwise by the folding portion 12b provided on the dustproof door 12, and is biased counterclockwise by the spring 14, so that it is in a substantially straight line with respect to the dustproof door 12. is maintained. On the other hand, a dustproof door switch 2 is fixed inside the escutcheon 10 and near the tip of the interlocking arm 13. 3rd b
As shown in the figure, when the dustproof door 12 is pressed with a finger or a tape pack, the interlocking arm 13 presses the dustproof door switch 2 as the dustproof door 12 rotates.

FIG. 4 is a sectional view showing a dustproof door and a dustproof door switch corresponding to FIG. 2, and the dustproof door 12 constantly presses the dustproof door switch 2a fixed to the inside lower part of the tape pack insertion opening 11 by a spring 15. On the other hand, the loading completion switch 16 is pressed when the tape pack 17 is loaded to the recording/reproducing position.

Although the present invention has been described above with reference to several embodiments, the device of the present invention is not limited to these examples, and when a recording/reproducing medium such as a tape pack is at the recording/reproducing position, It is clear that the present invention can also be applied to devices in a half-open state.

[Effects of the Invention] As explained above, according to the present invention, since the dustproof door is used as the eject switch button, there is no need to newly provide an eject operation button, and the ecution can be effectively utilized.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing an embodiment of the present invention.
The figure is a circuit diagram showing another embodiment of the present invention, Figures 3a and 3b are sectional views showing a dustproof door and a dustproof door switch corresponding to Figure 1, and Figure 4 is a dustproof door corresponding to Figure 2. FIG. 3 is a sectional view showing a dustproof door switch. 1... Loading completion switch, 2... Dust-proof door switch, 3... AND circuit, 4... One-shot multivibrator, 5... Flip-flop circuit, 6... Switching transistor, 7
... Eject motor, 8 ... Eject completion switch, 9 ... Inverter, 12 ... Dust-proof door.

Claims (1)

[Claims] 1. A first switch for detecting that the tape pack is loaded at the recording/playback position, and a second switch for detecting rotation of the dustproof door in the opening direction, An eject drive circuit is provided for driving an eject motor when the tape pack is in the recording/reproducing position upon detection of the first switch and the second switch, and rotation of the dustproof door is detected. The eject operation mechanism is characterized by: