JPS6013071Y2 - Tape recorder control device - Google Patents

Description

[Detailed description of the invention] The present invention moves the magnetic head and pinch roller to the playing position by performing high-speed tape running operation (fast forwarding or rewinding) during playback when the magnetic head and pinch roller are set at the playing position. The present invention relates to an improvement in a control device for a tape recorder that allows a cheap recorder to be moved back slightly toward a stop position, that is, a cue or review operation.

During the review state, the tape is fast-forwarding or rewinding at high speed while in contact with the magnetic head, so the magnetic head detects the signal recorded on the tape while the tape is running at high speed and detects the signal recorded on the tape. Many music selection systems are used in which the tape drive mechanism is switched from a high-speed tape running state to a playback state using a no-signal portion between signals.

In this case, if the pressure between the tape and the magnetic head is too strong,
The load of running the tape makes it impossible to wind the tape smoothly, and if the pressure contact between the tape and the magnetic head is weak, the recording signal on the tape cannot be detected by the magnetic head. The mechanism becomes difficult to control.

Therefore, the positional relationship of the magnetic head with respect to the tape is important in the music selection system.

Therefore, the present invention operates a tape high-speed operation lever during playback, and even if the operation lever is moved by a certain stroke,
The backward stroke of the support plate equipped with the magnetic head can be adjusted.

In other words, even if there is a concern that the backward stroke of the support plate may change due to component installation errors, weakening the pressure contact between the magnetic head and the tape, or causing the two to separate, the stroke can be easily adjusted. This makes it possible to obtain an appropriate pressure contact relationship between the tape and the tape.

Embodiments of the device of the present invention shown in the drawings will be described below.

A support plate 3 with magnetic heads 1 and 2 on its upper surface has a pair of elongated holes 4 and 4 in combination with guide shafts 5 and 5 to be able to slide freely in the front and back direction, and can be moved to a forward playing position and a retracted stop position. The position is set by guide shafts 5,5.

When the regeneration button 6 is pressed from the stopped state shown in FIG. Move forward from position to performance position.

At this time, the pinch lever 11 rotates counterclockwise about the support shaft 12 via the spring 10 wound around the shaft 9 on the support plate 3, and the pinch roller 13 is pressed against the capstan 14. At the same time, the magnetic heads 1 and 2 on the support plate 3
is pressed against the magnetic tape 16 in the cassette 15 indicated by the dashed line.

These structures are well-known mechanisms, and the playback button 6 is locked by a lock lever (not shown) to enter the playback state shown in FIG. 2.

A characteristic feature of the apparatus of the present invention is a mechanism for performing a high-speed tape running operation from the above-mentioned playback state. When the tape high-speed running button 17 is pressed, the operating lever 18 interlocked therewith moves in the direction of arrow A.

A contact piece 18' is provided at the tip of the operating lever 18, and one end 19a of the control lever 19 is attached to the corresponding contact piece 18'.
are facing each other so as to be in contact with each other or to be separated from each other.

The control lever 19 is rotatably provided around a shaft 20, and the other end 19b faces the tip 3a of the support plate 3.

A spring 21 is connected between the control lever 19 and the operating lever 18, and when the operating lever 18 is not operated, its contact piece 18' causes the other end 19a of the control lever 19 to be separated from the support plate 3. It is forcibly rotated counterclockwise.

Therefore, when the control lever 18 is operated, the control lever 19 rotates clockwise due to the expansion of the spring 21 in response to its stroke, and the other end 19b abuts against the support plate 3.

A long hole 23 is provided in the shaft 22 in the rotation passage of the control lever 19.
A stopper 25 is provided along the guide wall 24 and is adjustable in the direction of arrow A.

Note that the tension of the spring 21 is set to be sufficiently stronger than the tension of the spring 8.

However, in the playback state shown in FIG. 2, when the tape is run at high speed, the control lever 18 is moved by a certain stroke in the direction of arrow A, and at the same time, the control lever 19 is rotated clockwise by the extension of the spring 21.

The rotation stroke of the control lever 19 at this time is the stopper 2.
5, the other end 19b of the control lever 19 abuts against the tip 3a of the support plate 3, and the support plate 3 is moved from the playing position toward the stop position against the tension of the spring 8. Move it backwards slightly (see Figure 3).

The slight backward movement of the support plate 3 maintains the proper pressure contact between the magnetic heads 1 and 2 and the tape 16, and separates the pinch roller 13 from the capstan 14.

To adjust the pressure contact between the magnetic heads 1 and 2 and the tape 16,
This is possible by adjusting the stopper 25 in the direction of arrow A.

That is, by changing the position of the stopper 25, the rotation stroke of the control lever 19 can be changed, and as a result, the amount of backward movement of the support plate 3 can be changed.
The magnetic heads 1 and 2 are brought into optimal pressure contact with the tape 16.

Adjustment of the stopper 25 changes the rotation stroke of the control lever 19, but since the operating lever 18 is connected to the control lever 19 by the spring 21,
Of the constant operating stroke of the operating lever, a stroke greater than the stroke required to rotate the control lever 19, ie, an overstroke, is absorbed by the expansion of the spring 21.

As described above, when the device of the present invention detects the presence or absence of a signal on the tape during high-speed tape running operation in the playback state using the magnetic head, the pressure relationship between the magnetic head and the tape can be adjusted simply by adjusting the operating stroke of the control lever. Since it can be easily optimized, it is possible to easily prevent the occurrence of defects caused by loads during tape running due to variations in component installation and insufficient contact between the tape and the magnetic head, making it practical. It is something like that.

In addition, even if the operating stroke of the control lever changes, the overstroke of the operating lever for high-speed driving of the TEF is absorbed by the spring connected between the control lever, so it will not affect the operation of the operating lever. It is something.

[Brief explanation of the drawing]

The drawings show the apparatus of the present invention; FIG. 1 is a plan view in a stopped state, FIG. 2 is a plan view in a reproducing state, and FIG. 3 is a plan view in a state in which the tape is running at high speed in the reproducing state.

Claims (1)

[Scope of utility model registration request] In the tape recorder, the magnetic head and the pinch roller are slightly retracted from the performance position toward the stop position by performing a high-speed tape running operation during playback when the magnetic head and the pinch roller are set at the performance position. A control lever is movably provided between a support plate provided with a magnetic head and an operating lever that is linked to high-speed tape running operation, and the operating lever and the control lever are connected by a spring, and the operating lever is connected within the movement path of the control lever. A tape recorder characterized in that an adjustable stopper is provided, and by adjusting the operating stroke of the control lever with the stopper, the backward stroke of the support plate is adjusted, and the overstroke of the operating lever is absorbed by the spring. control device.