JPS5923241Y2 - Dubbing mechanism - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an after-recording mechanism for a magnetic recording/reproducing device.

The so-called dubbing mechanism re-records only the audio signal for the purpose of editing among the video and audio signals recorded on the recording medium.
With the dubbing operation, it is necessary to switch the audio circuit which is in the playback mode to the recording mode, and with the dubbing operation, it is necessary to switch the mode changeover switch of the audio circuit to the playback position.

Therefore, the conventional mode selector switch is in a state where the button is not pressed,
That is, it has a simple configuration in which it is in the playback position in stop mode and can be switched to the recording position only by dubbing and recording operations.

The present invention is designed to set the so-called EE mode in which recording audio signals can be monitored in the non-operating state by positioning the mode selector switch on the recording side in the non-operating state, and switching the mode selector switch to the playback position by the playback operation. This paper specifically proposes an after-recording mechanism in which the mode changeover switch is once forcibly returned to the recording position by an after-recording operation.

An embodiment in which the present invention is applied to an after-recording mechanism of a video tape recorder will be described below.

All of the figures show this embodiment, and FIG. 1 is an exploded perspective view showing the arrangement of the slide levers. Figure 1 is the dubbing operation rib of the dubbing button, 2 is the recording operation rib of the recording button, and 3 is an exploded perspective view showing the arrangement of the slide levers. 4 is a playback operation rib of the playback button, 4 is a playback lever that slides to the second position as the playback operation rib 3 moves, and 5 is a playback lever that slides to the second position as the recording operation rib 2 moves. A recording lever 6 that slides to the second position together with the lever is an after-recording lever that slides to the second position as the after-recording operation rib 1 moves.

Note 4a and 5a. 6a is a through hole that allows the recording operation rib 2 to enter, and 4b, 5b, and 6b are holes for each of the levers 4,
This is a long through hole for supporting the 5°6 on the support shaft 7 at different ratios.

The mechanism for operating the audio mode changeover switch by sliding each of the levers mentioned above will be explained below with reference to FIGS. 2 to 4.

FIG. 2 shows the switch changeover mechanism in a non-operated, stopped state, and the first bent piece of the regeneration lever 4, shown in figure 8, is pivoted on a support plate 9 and is biased to rotate counterclockwise. A first rotating lever 10 that brings the first engaging pin 8a into contact with the first engaging pin 8a is pivoted on the support plate 9, and makes the second retaining pin 10a face the second bent piece 6C of the dubbing lever 6. The second rotating lever 11 is pivotally supported on the first rotating lever 8, its rotation range is restricted by a bending claw 11a, and the second rotating lever 11 is rotated clockwise on the first rotating lever 8 by a first spring 12. The planting pin 10 on the second rotating lever 10 is biased into the guide hole 11b.
14 is a second lever that urges the switching lever 13 toward the guide pin; A mode changeover switch is shown in which the audio circuit is placed in the recording mode when the switching lever 13 is slid, and the audio circuit is placed in the recording mode.

Therefore, in the state shown in FIG. 2, the mode changeover switch is in the recording position, so that it is possible to monitor the audio signal.

Therefore, when the switch changeover mechanism is in the first position shown in FIG. 2, when the play button 4 is slid to the second position by pressing the play button, the first rotation lever 8 is moved as shown in FIG. is rotated to the second position, and the pivot of the third rotating lever 11 is moved clockwise.

Therefore, the state of the third rotating lever 11 changes somewhat with respect to the first rotating lever 8, but the biasing force of the second spring 12 that is greater than the biasing force of the second spring 14 causes the switching lever 13 to be moved to the first rotating lever 8. Slide the mode selector switch 15 to the 2nd position and switch the mode selector switch 15 to the playback position.

When the dubbing button is further pressed in this state, the dubbing lever 6 cannot be slid to the second position as shown in FIG. guide to rotate the second rotating lever 10 to the second position.

Therefore, the third rotating lever 11 that engages with the planting pin 10b is unable to rotate counterclockwise against the bias of the first spring 12, and the third rotating lever 11 that engages with the planting pin 10b is prevented from rotating in the counterclockwise direction. By returning to the 1 position, the mode changeover switch 1
5 is returned to the recording position until the dubbing button is released.

In this embodiment, when the record button is pressed, in addition to the recording lever 5, the playback lever 4 and the dubbing lever 6 are simultaneously moved to the second position.
The above-mentioned switch switching mechanism is
This is the same as the post-recording mode shown in FIG.

Therefore, the audio circuit falls into recording mode.

As described above, according to the present invention, by skillfully combining levers with adjacent push buttons, EE can be activated in a stopped state.
It is possible to realize a post-recording mechanism that works as a mode, and the effect is great.

[Brief explanation of the drawing]

Each of the figures shows an embodiment of the present invention; Fig. 1 is an exploded perspective view of the operating lever, Fig. 2 is a view showing the switch changeover mechanism in stop mode, and Fig. 3 is a regeneration of the same mechanism. FIG. 4 is a diagram showing the state of the same mechanism in the dubbing mode or the recording mode. Explanation of main figure numbers, 4... Playback lever, 5... Recording lever, 6... Dubbing lever, 8... First rotating lever 10... Second rotating lever, 11...・Third rotation lever, 15...mode changeover switch.

Claims (1)

[Scope of utility model registration request] a playback lever that slides to a second position when a playback button is pressed; an dubbing lever that slides to a second position when a dubbing button is pressed; and a dubbing lever that slides to the second position together with the playback lever and the dubbing lever when a recording button is pressed. a recording lever that moves; a first rotating lever that rotates to the second position as the playback lever slides to the second position; and a second rotating lever that rotates as the dubbing lever slides to the second position. a second rotating lever that rotates to a second position; and a guide pin is positioned in a second position as the first rotating lever rotates to a second position; A third rotating lever that positions the guide pin in the first position as the lever rotates to the second position, and a mode changeover switch for audio as the guide pin moves to the second position. An after-recording mechanism for a magnetic recording/reproducing device, which includes switching levers for switching from the position to the playback position.