JPS6149740B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording device used in a tape recorder or the like, and is configured to smoothly switch between a manual recording level and an automatic recording level.

Generally, in tape recorders, the recording level is set manually (hereinafter referred to as MLC), in which the recording level is set to an arbitrary level according to the operator's preference.
There is also an automatic type (Automatic Level Control, hereinafter referred to as ALC) that sets the level to an appropriate level in advance, and each type is used depending on the purpose and preference. However, when using these methods, it is necessary to operate a switch each time, and after switching to MLC, manually operate the volume etc. to set the level, which is not only complicated, but also easy to forget. , when switching from ALC to MLC, if MLC is set at a low level, there is a problem that the recording will be at a low level as soon as the switch is made. Also, when switching from MLC to ALC, the above was reversed, and the sound suddenly went from being quiet to loud, which caused some inconvenience. Furthermore, when recording is gradually made louder and switched to automatic, or fade-in and fade-out recording is performed where automatic recording is gradually made quieter, it is necessary to set the automatic and manual levels to the same level before switching, so do this. The disadvantages of this method are that it is necessary to operate it in a short period of time while looking at a level indicator, etc., and it is complicated and requires a heat source.

The present invention eliminates these conventional drawbacks, and one embodiment of the present invention will be described in detail below with accompanying drawings.

Figure 1 shows the main parts of the recording system of a tape recorder. 1 is a microphone, 2 is a volume for manually adjusting the recording level, and 3 is a resistor for automatically setting the recording level, which is set to an appropriate value in advance. vessel,
4 is a switch for switching between volume 2 and resistor 3; 5 is a recording amplifier; 6 is a trap circuit; 7 is a recording bias circuit; and 8 is a recording head. The sliding terminal 2 of the volume 2 and the switch 4 are interlocked with each other.

FIG. 2 shows the combined state of the volume 2 and the switch 4, where 2 is the volume shown in FIG. 1, 9 is an operating lever for sliding the sliding terminal 2a, and 10 is the volume 2. The central through hole 11a of the guide pin 11 attached to the control lever 9 is fitted into the operating lever 9, and the left and right elongated holes 11b, 11b are loosely fitted into the guide pins 10, 10, so that the operating lever 9
A sliding plate that moves left and right simultaneously with the movement of 11
c is an engagement hole provided at its tip; 4 is the switch shown in FIG. 1; 12 is an operating lever for operating the switch 4; 12a is a concave portion of the operating lever 12; 13 is a chassis (not shown). 14 is a connecting lever rotatably attached to the pin 13, 14a is a protrusion provided at the lower end of the connecting lever 14 and engaged in the recess 12a of the operating lever 12, 14b and 14c are Connection lever 14
It is a locking piece provided at the tip of.

In the above configuration, it is assumed that if the operating lever 9 of the volume 2 is slid to the right, the recording level will become higher, and if it is slid to the left, the recording level will be lowered. In this state, if you slide the operating lever 9 to the right and gradually increase the manual recording level, the tip of the slide plate 11 will eventually touch the mating piece 14 of the connecting lever 14, as shown in FIG. 3b.
, and then rotate the connecting lever 14 clockwise as shown in Figures 3c and d. As a result, the operating lever 12 of the switch 4 is moved to the left, and the switch 4 is switched to the resistor 3 side in FIG.

From this state, if you operate the control lever 9 in the right direction, that is, in the direction to lower the recording level, the third
As shown in Figure d, the engaging piece 14b of the connecting lever 14
is completely engaged with the engagement hole 11c of the slide plate 11, so as the slide plate 11 moves to the left, the connecting lever 14 is also rotated counterclockwise, and soon the switch 4 is moved to the position shown in FIG. switch to the volume 2 side.

Therefore, if the resistance value of the volume 2 is made equal to the value of the resistor 3 at the moment the switch 4 is switched, the recording level will not change at all when switching from automatic to manual and from manual to automatic. Therefore, there is no need to perform operations in a short period of time while watching an indicator or the like in order to make the recording level the same as in the past, and fade-in and fade-out recording can be performed extremely easily.

Note that the automatic recording level is usually set slightly lower than the maximum value, and when manually setting the level, it is almost never set above the automatic recording level. Therefore, even if the mode is accidentally switched from manual to automatic during manual adjustment, there is no practical problem.

As described above, according to the present invention, it is possible to switch between the automatic recording level and the manual recording level while keeping them equal with a very simple operation, so recording level adjustment at the time of fade-in and fade-out, etc. can be performed extremely easily. .

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an embodiment of the present invention, FIG. 2 is a perspective view of its essential parts, and FIGS. 3 a, b, c, and d are explanatory diagrams of its operation. 1...Microphone, 2...Volume, 3...
...Resistor, 4...Switch, 5...Recording amplifier,
8...Recording head, 11...Slide plate, 14...
...Connection lever.

Claims (1)

[Claims] 1.Equipped with an automatic recording level adjustment device in which a recording level is set in advance, a manual recording level adjustment device that is set to an arbitrary recording level, and a switch that switches between the automatic and manual recording level adjustment device, the manual recording level adjustment device A recording device in which a level adjusting means of the device and the switch are linked so that the recording level of the manual recording level adjusting device at the moment the switch is switched is equal to the recording level of the automatic recording level adjusting device.