JPS5814438Y2 - Tape recorder mode switching mechanism - Google Patents

Description

[Detailed description of the invention] This invention relates to a tape recorder mode switching mechanism that sequentially switches between playback, stop, and recording. In order to prevent switching, the switching operating force during recording is increased to make it heavier than the normal switching mode, and once recording has started, the switching operating force must be increased to stop recording or to switch repeatedly. The purpose is to make it small so that it can be easily switched with light moderation.

In general, tape recorders are equipped with a so-called record button that alerts you to these issues when switching to recording, in order to prevent the user from accidentally switching to recording and erasing or duplicating the already recorded tape. In most cases, the recording selector switch will not operate unless you operate the switch.

However, during recording, such as during dictation recording, the recording
If it is necessary to use the stop repeatedly, it is extremely cumbersome and impractical to operate the recording button each time you switch from the stop position to recording.For this reason, conventionally, as a countermeasure, it was necessary to cancel the recording button each time the stop was stopped. There is a known recording button that is released when rewinding without rewinding, but even in this case, there is an unavoidable drawback that it is troublesome to operate the recording button separately from the changeover switch each time recording is started.

This invention is intended to eliminate such drawbacks, and will be explained below with reference to the embodiments shown in the drawings.

Figures 1 and 2 show the recording, stop, playback, and rewind switching operation knobs used in the microphone of a dictation recorder and tape recorder, and Figure 1 shows the switching operation that slides back and forth in a straight line. As an example of a knob, FIG. 2 shows an example of a switching operation knob by rotation.

In these figures, reference numeral 1 indicates a switching knob for switching between recording, stop, playback, and rewinding, and 2 indicates a drive arm that slides linearly in conjunction with the switching knob 1.

Normally, switches for recording, stopping, playing, and rewinding are driven directly or indirectly by this drive arm 2.

The drive arm 2 also includes a rotating plate 4 shown in FIG. 3, which will be described later.
It has a protrusion 3 such as a bent part or a pin for abutting on and rotating it.

Fig. 3 shows the mode switching mechanism driven by the drive arm 2, in which A shows the playback state, B shows the stopped state, C shows the recording state, and the figure shows the state returned from recording to stop. They are shown below.

In FIG. 3, 4 is a rotating plate that can rotate around an axis 5, and 6 is a braking mechanism for the rotating plate that always presses the periphery of the rotating plate 4 toward its center of rotation. In the figure, the left end of the leaf spring 6 is a fixed end, and the right end is an open end.

The braking mechanism described above does not rely on the leaf spring 6, but can also achieve the same function by combining the arm rod 7 and the spring 8, for example, as shown in FIG.

On the circumference of the rotary plate 4, cutouts a and b are provided which are prevented from freely rotating by the leaf spring 6, and the rotary plate 4 is stably stopped at a position where these are in contact with the leaf spring 6.

Furthermore, the protrusion 3 of the drive arm 2 is arranged on the rotating plate 4 between the playback position (PLAY) and the stop position (STOP) (see FIG. 3 A and B), and between the recording position (RDC) and the stop position ( ST
OP) (see FIG. 3, C and D), an escape cutout recess C is provided so as not to touch the rotating plate 4.

Now, as shown in FIG. 3AK, when the switching operation knob 1 moves from the playback position to the stop position, the protrusion 3 of the drive arm 2 that interlocks with this does not contact the rotating plate 4, and the rotating plate 4 is stopped in contact with the leaf spring 6 at the notch a.

Next, as shown in FIG. 3BK, when the switching operation knob 1 reaches the stop position, the protrusion 3 stops in contact with the first edge C□ of the notched recess C of the rotating plate 4.

Next, as shown in FIG. 3CK, when the switching operation knob 1 is switched to the recording position, the protrusion 3 rotates the rotary plate 4 clockwise in the figure, and the rotary plate 4 has a cutout portion that is connected to the plate spring. It touches 6 and stops stably.

During this time, the rotating plate 4 rotates against the pressing force of the leaf spring 6, so the switching operation force of the switching operation knob 1 between stop and recording becomes large, that is, heavy, so that it jumps from playback to stop. This eliminates the possibility of suddenly switching to recording.
It is possible to prevent accidents such as erasing a recorded section that has already been recorded or recording duplicates.

Furthermore, as shown in the third diagram, when the switching operation knob 1 is returned from recording to stop, the protrusion 3 of the drive arm 2 does not rotate the rotating plate 4, and the protrusion 3 is inserted into the notch recess of the rotating plate 4. C second
Since it stops in contact with the edge c2 of the switching operation knob 1
The switching actuation force is small, and it is possible to switch from recording to stopping with a light moderation.

When the rotary plate 4 is in the state shown in Fig. 3C and D, the recording 0 stop of the switching operation knob 1 is switched with a light moderation, and it is possible to perform a so-called pause in which the recording stops momentarily in small steps with a light moderation. can.

As described above, this invention includes a drive arm 2 having a contact portion (protrusion 3 in the embodiment) that moves in accordance with switching operations of a tape recorder mode such as playback, stop, and recording;
It has a notched recess C that engages/disengages with the abutting part of the drive arm, and when the abutting part of the drive arm moves, the first and second
The rotating plate 4 is rotated to a rotating state of , a braking mechanism (a notch a provided in the leaf spring 6 and the rotating plate 4 of the embodiment) that maintains the second rotational state (the rotational state shown in C and DK in FIG. , b, or an arm 7, a spring 8, and notches a and b provided in the rotary plate 4), and the notch recess C is provided with a first rotation of the rotary plate 4. In this state, the first edge c1 engages with the contact portion of the drive arm 2 when switching from the stop mode to the recording mode, and in the second rotating state of the rotating plate 4, the first edge c1 engages with the contact portion of the driving arm 2 when switching from the stop mode to the recording mode. a second edge c2 that engages with the abutting portion when switching to the
These two edges c1. The position of c2 is between the contact portion and each edge c1. To provide a mode switching mechanism for a tape recorder, characterized in that c2 is set at a position where it does not engage with any edge during mode switching other than mode switching in which the standstill state occurs. When switching from playback to stop, it is possible to prevent accidents such as accidentally jumping over the stop position and switching to the recording position, resulting in erroneous recording.Also, once recording has started, it is possible to stop recording or It has the advantage that these repeated switchings can be easily switched and used with light moderation.

[Brief explanation of drawings]

Figures 1 and 2 are perspective views showing an example of a sliding slide type or rotary type switching operation knob, Figures 3A, B, C,
D shows an example of the mode switching mechanism of the tape recorder according to this invention; A in the figure is in the playback state, B in the figure is in the stopped state, C is in the recording state, and the figure shows the switch back from recording to stop. FIG. 4 is a plan view showing another embodiment of this invention. 1...Switching operation knob, 2...Drive arm,
3... Protrusion, 4... Rotating plate, 5...
... shaft, 6 ... leaf spring, 7 ... arm rod, 8 ... spring, a, b ... notch in rotating plate, C...Notch recess of rotating plate.

Claims (1)

[Scope of utility model registration request] It has a drive arm having a contact portion that moves in accordance with switching operations of the tape recorder mode such as playback, stop, and recording, and a notch recess that engages and disengages with the contact portion of the drive arm,
The movement of the abutting portion of the drive arm causes a rotating plate to be rotated into the first and second rotating states, and the rotating plate has a strong force in the first rotating state and a rotating plate in the first and second rotating states. A braking mechanism is provided in the notched recess to maintain the second rotational state with a weaker moderation, and the notch recess is provided with a braking mechanism that maintains the rotational state of the rotational plate in the first rotational state when switching from the stop mode to the recording mode. a first edge that engages with the abutting portion of the drive arm;
In the second rotating state of the rotating plate, a second edge is provided that engages with the abutting portion when switching from the stop mode to the playback mode, and the positions of these two edges are as follows: The contact portion and each of the edges are set at a position where they do not engage with any of the edges when the mode is changed to be in each of the stopped states and the mode is changed outside the board. Tape recorder mode switching mechanism.