JP2606472Y2 - Recording timing control device for tape recorder - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording timing control device for a tape recorder.

[0002]

2. Description of the Related Art In a conventional tape recorder, mechanical noise generated when switching from another mode to a recording mode using an operating member is generated by a magnetic tape via a magnetic head.
In order to prevent the recording from being performed on the recording, a switch called a transient switch is provided to control the recording start timing. Further, in order to operate the transient switch, there are provided a slide-type operation button for setting a recording mode and a rotation lever which rotates in conjunction with the push button.

When the recording mode is set, the transient switch is operated by the above-mentioned rotary lever, and the mechanical system setting such as the movement of the pinch roller is completed by the completion of the operation of the slide type operation button and the like, and the electric system is completed. Immediately after the recording mode is set, a signal to be recorded is supplied from the electric system to the recording head.

[0004]

In the conventional tape recorder as described above, in order to operate the transient switch at an optimum timing, the rotary lever is moved with a predetermined relationship with the operating member. It has to be adjusted, and the adjustment work is complicated.

The present invention has been made under the circumstances described above, and it is an object of the present invention to provide a tape recorder recording timing control device capable of controlling a desired recording start timing without requiring a complicated adjustment operation. .

[0006]

In order to achieve the above-mentioned object of the present invention, a recording timing device for a tape recorder according to the first invention has a recording mode setting operation member and an erasing head mounted thereon. , Operation for setting the above recording mode
Engage with the member via the engagement section, and perform the recording mode setting operation.
An erasing head mounting member supported so as to rotate between a first position where the erasing head is in contact with the magnetic tape and a second position where the erasing head is separated from the magnetic tape by moving the working member ; The rotation of the erasing head mounting member
The center of rotation is larger than the distance from the center of
And a switch mechanism configured to control the timing of recording start with the rotation of the erasing head mounting member to the first position when the recording mode is set. It is characterized by. The recording timing control device for a tape recorder according to the second invention includes a recording mode setting operation member and the recording mode setting operation member.
Switch for switching the amplifier circuit for recording or reproduction by operating the operation member for erasing, and the erasing head mounted thereon, and engaged with the operation member for recording mode setting.
The recording mode setting operation member.
By moving, the erasing head mounting member which is supported so as to pivot between a second position spaced from the first position and the magnetic tape to which the erase head is in contact with the magnetic tape, the erasing head From the center of the rotation of the mounting member
More distant from the center of rotation than the distance to the engagement part
Position, and when the recording mode is set,
In response to the rotation of the head mounting member to the first position,
After switching the amplifier circuit for recording,
The audio signal to be recorded in the loop
And a switch mechanism for controlling recording start timing by supplying the recording head to the raw head . Further, the recording timing control device of the tape recorder according to the third invention is an amplifier circuit switching device for switching an amplifier circuit for recording or reproduction by operating the recording mode setting operation member and the recording mode setting operation member. and switch, erasing head is placed, the recording mode
The recording mode.
The erase head is supported so as to rotate between a first position in contact with the magnetic tape and a second position separated from the magnetic tape by moving the operation member for setting the magnetic tape.
And erasing head mounting member that is, the erasing head mounting member
Above the distance from the center of rotation to the engagement portion.
A contact point provided at a position distant from the center of rotation;
The erasing head mounting member is brought into contact with the contact portion at a predetermined rotation position.
It has a stop part that comes in contact with the
Based on the contact state between the point and the stop, the amplifier
After switching the circuit for recording,
The audio signal to be recorded from the amplifier circuit
And a switch mechanism for controlling the timing of recording start by supplying the signal to the recording device.

[0007]

In the recording timing control device for a tape recorder according to the first aspect of the present invention, the recording mode setting operation member is engaged with the recording mode setting operation member . Erase head
The mounting member rotates to the first position, and the switch mechanism controls the timing of starting recording in accordance with the rotation . Also, the second
In the recording timing control device of the tape recorder according to the invention, the operating member for setting the recording mode is operated.
And the amplifier changeover switch switches the amplifier circuit for recording
You. On the other hand, when the eraser engaged with the recording mode
The pad mounting member rotates to the first position, and responds to this rotation.
After the switch mechanism switches the amplifier circuit for recording
The audio signal to be recorded on the magnetic tape from the amplifier circuit
The recording start timing is controlled by supplying the recording / playback head . Further, in the recording timing control device of the tape recorder according to the third invention, when the recording mode setting operation member is operated, the amplifier changeover switch is operated.
Switches the amplifier circuit for recording. Meanwhile, recording mode
The erase head mounting member engaged with the setting operation member is the first
Rotate to the position. At this time, the erasing head
And the stop which comes into contact with the contact
Based on these contact states.
After switching the amplifier circuit for recording,
Audio signal to be recorded from amplifier circuit to recording / playback head
The timing of the start of recording is controlled by the supply .

[0008]

FIG. 1 is a plan view schematically showing a main part of a tape recorder provided with a recording timing control device according to an embodiment of the present invention in a stop mode setting state. I have.

The main part is provided with a metal-made square flat plate-shaped main chassis 10 constituting the bottom plate of the tape cassette storage recess of the tape recorder. The tape recorder uses a tape cassette called a microcassette, and is inserted into and engaged with a pair of reel hubs of the tape cassette at substantially the center of the upper surface of the main chassis 10. A pair of reel shafts 12 are supported.

One side edge (the lower edge in FIG. 1) of the main chassis 10 is upward (in FIG. 1, the direction in which it rises perpendicularly to the paper surface).
The main chassis 10 is provided with a recording / reproducing head supporting lever 14 extending along the side wall 10a at one side edge of the upper surface of the main chassis 10. The recording / reproducing head support lever 14 supports a recording / reproducing head 16 with a tape guide 16a near the center right in the longitudinal direction, and the rotation center axis 18 is closer to the center left in the longitudinal direction.
Thus, it is rotatably mounted on the upper surface of the main chassis 10.

The left end of the recording / reproducing head support lever 14 is formed as an engaging projection 14a projecting from the lower surface of the main chassis 10 through an opening 10b formed in the main chassis 10. Is engaged with an engagement hook 20a at one end of an engagement lever 20 rotatably attached to the lower surface of the main chassis 10.

The other end of the engaging lever 20 constitutes a cassette detecting portion 20b projecting from the upper surface of the main chassis 10 through the opening 10b, and the engaging lever 20 is provided on the upper surface of the main chassis 10. The torsion coil spring 22 is urged to the above-described engagement position by the supported torsion coil spring 22. The cassette detecting portion 20b is pressed by the tape cassette stored in the tape cassette storing recess of the tape recorder, and the engaging lever is engaged.
20 is rotated clockwise from the engagement position described above against the urging force of the torsion coil spring 22. Engaging lever-2
This rotation of 0 releases the engagement of the engagement hook 20a at one end of the engagement lever 20 with the engagement projection 14a at the left end of the recording / reproducing head support lever 14.

At the right end of the recording / reproducing head support lever 14, a tension coil spring (not shown) is bridged between the main chassis 10 and the recording / reproducing head support lever 14 by the arrow A of the tension coil spring. It is urged to rotate around the rotation center shaft 18 in the counterclockwise direction by the urging force in the direction shown. However, the recording / reproducing head supporting lever 14 is held at the stop position shown in FIG. 1 against the urging force by the above-mentioned engagement with the engaging lever 20.

On the upper surface of the main chassis 10, inwardly (upward in FIG. 1) of the right end of the recording / reproducing head support lever 14, a stop column 24 made of a conductive material fixed to the upper surface of the main chassis 10. Is located. In this embodiment, the stop pillar 24 is used.
Is formed of a gold-plated steel bar and is earthed to the main chassis 10.

In the center area of the upper surface of the recording / reproducing head support lever 14, a rotation center shaft 26 fixed to the upper surface of the main chassis 10 near the rotation center axis 18 of the recording / reproducing head support lever 14 is provided. A rotatable pinch roller support lever
28 are arranged. The pinch roller support lever 28 rotatably supports the pinch roller 30 between the rotation center shaft 26 and the recording / reproducing head 16 on the recording / reproducing head supporting lever 14. The pinch roller support lever 28 is wound around the rotation center shaft 26, and the rotation center shaft is rotated by a torsion coil spring 32 whose both ends are bridged between the pinch roller support lever 28 and the side wall 10a of the main chassis 10. The stop pawl 28 is urged in a counterclockwise direction around 26, but extends into the opening 10b of the main chassis 10 from the rotation center shaft 26.
1 a is held at the stop position shown in FIG. 1 against the biasing force of the torsion coil spring 32 by contacting the left end of the inner edge of the recording / reproducing head support lever 14.

The pinch roller support lever 28 is formed to be elongated in the recording / reproducing head support lever 14 and the main chassis 10 substantially along the rotation direction of the recording / reproducing head supporting lever 14 and the pinch roller supporting lever 28. The pinch roller control pin 28b protrudes to the lower surface side of the main chassis 10 through the through hole formed in the vicinity of the rotation center axis of the pinch roller 30.

An inner edge of the recording / reproducing head support lever 14 is provided between the pair of reel shafts 12 and the recording / reproducing head supporting lever 14 and the pinch roller supporting lever 28 on the upper surface of the main chassis 10. A pair of cassette positioning pins 34 spaced apart from each other in the direction along the arrow are fixed, and the main chassis 10 is located on the locus of inward movement of the pinch roller 30 between the pair of cassette positioning pins 34. A capstan shaft 36 rotatably supported on the shaft is disposed.

The upper surface of the main chassis 10 extends along the side wall 10a between the outer edge (lower edge in FIG. 1) of the right end of the recording / reproducing head support lever 14 and the side wall 10a of the main chassis 10. The erase head support lever 38 is disposed. The erasing head supporting lever 38 is formed by integral molding of a synthetic resin, and the left end near the recording / reproducing head 16 and the pinch roller 30 is turned on a turning center axis 40 fixed to the upper surface of the main chassis 10. It is freely supported. The erasing head support lever 38 is wound around a rotation center shaft 40, and both ends are rotated by a biasing force of a torsion coil spring 42 which is bridged between the side wall 10 a of the main chassis 10 and the erasing head support lever 38. It is urged clockwise around 40, and is held at the stop position shown in FIG. 1 against the urging force of the torsion coil spring 42 by contacting the side wall 10a.

The right end of the erasing head support control lever 38 projects inward (upward in FIG. 1) of the main chassis 10 above the recording / reproducing head support lever 14, and its protruding end is formed by a permanent magnet. The configured erasing head 44 is supported. At the right end, adjacent to the erase head 44,
A contact spring 46 formed by pressing a plate-shaped metal conductive material is attached. In this embodiment, the contact spring 46 is made of phosphor bronze and plated with gold. FIGS. 2A and 2B show an enlarged view of the support structure of the contact spring 46 at the right end of the erase head support lever 38. FIG.

At the right end of the erasing head supporting lever 38, an erasing head receiving portion which rises larger than the base end of the erasing head 44 from the upper surface of the erasing head supporting lever 38 to firmly hold the base of the erasing head 44. A block 38a is formed. From the erase head receiving block 38a, FIG.
(B), the contact spring support locking projection 38b protrudes rightward at a position higher than the stop post 24 on the main chassis 10.

As shown in FIG. 2A, the contact spring 46 has a substantially U-shaped planar shape, and a space surrounded by a curved portion has an upper surface at the right end of the erasing head supporting lever 38. The contact spring mounting pin 38c formed adjacent to the erasing head receiving block 38a is inserted outside the erasing head receiving block 38a. One piece of the substantially U-shaped contact spring 46 extends along the outwardly facing rising surface of the erasing head receiving block 38a and onto the outer surface of the contact spring supporting and locking projection 38b. (B), the upper surface of the erasing head receiving block 38a is branched upward and downward, and a lower branch portion forms an elastic contact 46a.

The other piece of the substantially U-shaped contact spring 46 extends along the rising surface of the erasing head receiving block 38a on the upper surface of the right end of the erasing head supporting lever 38 in the same manner as the above piece, and thereafter, A direction (main shaft) away from the rising surface of the erasing head receiving block 38a along another contact spring mounting pin 38d formed on the upper surface.
It is bent outward (on the upper surface of the sheet 10). The upper end of the other contact spring mounting pin 38d is in contact with the upper edge of the outer bent end of the other contact spring 46 to contact the upper end of the right end of the erasing head support lever 38 with the contact spring 4 from above.
A lifting prevention collar 38e for preventing the lifting of No. 6 is formed.

As described above, the erasing head receiving block 38
a, the contact spring support locking projection 38b, the contact spring mounting pin 38c, and another contact spring mounting pin 38d are formed on the upper surface of the right end of the erasing head support lever 38 as follows. A U-shaped contact spring 46 can be attached.

First, the contact spring 46 is approached from above the right end to the upper surface of the right end while the two pieces of the contact spring 46 having a substantially U shape are pinched and brought close to each other.
The space surrounded by the curved portion 6 is put on the contact spring mounting pin 38c on the upper surface of the right end. Next, when the gripping force applied to the two pieces of the contact spring 46 is released to release the approach of the two pieces, the above-mentioned one piece becomes contact spring supporting and locking projection as shown in FIGS. 2 (a) and 2 (b). 38b is placed at a predetermined position on the outer surface, and the other piece is hooked onto another contact spring mounting pin 38d as described above.

A lead wire 48 electrically connected to an electric circuit in the main body of the tape recorder (not shown) is connected to the outer bent end of the other piece of the contact spring 46. Then, the erasing head supporting lever 38 is rotated inward of the main chassis 10 as described later in detail, and the elastic contact 46a of the contact spring 46 contacts the stop column 24 on the main chassis 10 to be earthed. Then, in order for the recording / reproducing head 16 to function as a recording head, a signal for recording the electric circuit on a magnetic tape is supplied to the recording / reproducing head 16 from an amplifier in the electric circuit which is switched for recording. Control.

That is, the contact spring 46 and the stop column 24 are connected by a tape.
When the recording mode is set in the pre-recorder, a signal to be recorded on the magnetic tape is supplied to the recording / reproducing head 16 from the amplifier which has been switched for recording in the electric circuit before the mutual contact is made. A recording timing control switch called a transient switch or a mute switch for controlling the timing of the recording is constructed. When the elastic contact 46a of the contact spring 46 is in contact with the stop column 24, an audio signal from the amplifier which is switched for recording in the electric circuit is supplied to the recording / reproducing head 16, and the elasticity of the contact spring 46 is When the contact 46a is separated from the stop post 24, the recording timing is controlled so that the audio signal from the amplifier switched for recording in the electric circuit is not supplied to the recording / reproducing head 16.

As shown in FIG. 1, on the lower surface of the main chassis 10, an eject lever 5 having an eject button 50 protruding outward from the side wall 10a from the left end of one side edge described above.
0a and a fast-forward lever 52a having a fast-forward button 52, and a slide lever 54a having a slide-type operation button 54 protruding outward from the side wall 10a from the right end of one side edge described above. Have been. In FIG. 1, each of an eject button 50, a fast-forward button 52, and a slide-type operation button 54 is arranged at a rest position, and a tape cassette is stored in the tape cassette storage recess of the above-mentioned tape recorder. Not.

The sliding operation button 54 can be moved one step to the right and two steps to the left from the above-mentioned rest position, and is not shown at the above-mentioned rest position, the first step to the right and the first step to the left. It is held with a predetermined force by the click mechanism. In the position of the second stage on the left side, the slide lever is operated by the finger force of the operator of the tape recorder applied to the slide operation button 54.
The tape recorder held between the lower surface 54a and the lower surface of the main chassis 10 can be held against the urging force of the urging means (not shown) of the tape recorder.

In this embodiment, the above-mentioned rest position of the slide type operation button 54 is a stop mode setting position, the right first stage moving position is a recording mode setting position, and the left first stage. Is the playback mode setting position, and the second left movement position is the fast rewind mode setting position.

The slide lever 54a is connected to an amplifier circuit changeover switch called a slide switch for switching the amplifier circuit in the electric circuit of the tape recorder for recording or reproduction, and the amplifier circuit changeover switch is a slide type. When the operation button 54 is located at the recording mode setting position, the amplifier circuit is switched for recording, and when the operation button 54 is located at the reproduction mode setting position, the amplifier circuit is switched for reproduction.

The slide type operation button 54 is opposed to the rotation center axis 40 at the left end of the erasing head support lever 38, and the left end of the erasure head support lever 38 is located at the left and right sides of the rotation center axis 40. A forced pushing passive projection 56 and a forced retracting passive projection 58 protruding toward the sliding operation button 54 are formed.

The sliding operation button 54 is slightly attached to the outwardly projecting ends of the forcibly pushing drive projection 60 and the forcibly retracting passive projection 58 which are in contact with the left edge of the forcibly pushing passive projection 56 at the left end of the erasing head support lever 38. A forced retraction drive projection 62 is formed to face through the gap. In this case, the inner surface of the forced retraction drive projection 62 which faces the outwardly projecting end of the forced retraction passive projection 58 of the erasing head support lever 38 via a slight gap is inclined obliquely outward to the left in the drawing. I have. Next, the operation of the recording timing control device according to one embodiment of the present invention configured as described above will be described in detail with reference to FIGS.

In the tape recorder provided with the recording timing control device described above, the opening of the tape cassette storage recess is covered with a kangar-pocket type cassette lid. The lid can be moved to the open position. The tape cassette can be stored in the tape cassette storage recess by moving the cassette lid to the closed position after mounting the predetermined tape cassette in the kangar-pocket of the cassette lid in the predetermined position in the open position. At this time, the cassette detecting portion 20b of the engaging lever 20 projecting from the opening 10b of the main chassis 10 to the upper surface side of the main chassis 10 is pressed by the tape cassette. Then the engagement lever-2
0 rotates clockwise from the engagement position in FIG. 1 against the urging force of the torsion coil spring 22, and engages with the engagement protrusion 14a on the left end of the recording / reproducing head support lever 14 as shown in FIG. The engagement of the engagement hook 20a at one end of the lever 20 is released.

Then, the recording / reproducing head support lever 14 rotates counterclockwise around its own rotation center axis 18 by the urging force in the direction of arrow A of a tension coil spring (not shown) connected to the right end. . This rotation of the recording / reproducing head support lever 14 is stopped when the right end of the inner edge thereof comes into contact with a stop post 24 on the upper surface of the main chassis 10 as shown in FIG. Here, the recording / reproducing head 16 on the recording / reproducing head support lever 14 enters a head insertion window (not shown) of the tape cassette together with a pair of tape guides 16a and strikes a magnetic tape 64 in the tape cassette. Touch

The pinch roller support lever 28 is provided with a recording / reproducing head support lever by the urging force of a torsion coil spring 32 stretched between itself and the side wall 10a of the main chassis 10.
14 rotates counterclockwise around its own rotation center axis 26 following the above rotation. Pinch roller support lever
The pinch roller control pin 28b at the right end of the lever 28 moves through the above-mentioned through hole of the recording / reproducing head support lever 14 and the main chassis 10, and the slide lever of the slide type operation button 54 is moved.
The rotation of the pinch roller support lever 28 is stopped immediately before the pinch roller 30 comes into contact with the magnetic tape 64 by contacting a cam surface (not shown) formed at 54a. This position of the pinch roller support lever 28 is a standby position. As described above, in the tape recorder, the standby mode is automatically set only by storing a predetermined tape cassette in the tape cassette storage recess.

Next, when the slide type operation button 54 is moved from the rest position (stop mode setting position) shown in FIG. 3 to the first stage right movement position (recording mode setting position), The pinch roller support lever 28 is released from the above-described rotation control of the slide lever 54a of the slide type operation button 54 by the cam surface (not shown), and the pinch roller 30 turns the magnetic tape 64 as shown in FIG. 36, and the pinch roller 30 cooperates with the capstan 36 to form the magnetic tape 6.
4 is pinched.

The sliding operation button 54 which is moved as described above presses the left edge of the forcibly pushed passive projection 56 at the left end of the erasing head support lever 38 to the right by the forcibly pushed driving projection 60, whereby the erasing head is erased. Support lever 38
Is pressed counterclockwise around its own rotation center axis 40 against the biasing force of the torsion coil spring 42 bridged between itself and the side wall 10a of the main chassis 10.

The erasing head supporting lever 38, which is to be rotated in the counterclockwise direction by this pressing force, is forcibly driven by the sliding operation button 54 in accordance with the rightward movement of the sliding operation button 54 described above. The position where the outwardly projecting end of the forcibly retracted passive projection 58 at the left end of the erasing head support lever 38 on the above-mentioned inner surface which is inclined diagonally outward to the left of the projection 62 is positioned from the right end to the left end on the inner surface. As a result, the outwardly protruding end of the forced retraction passive projection 58 is prevented from contacting the inclined inner surface of the forced retraction drive projection 62 of the slide operation button 54 by rotating in the counterclockwise direction. ing.

That is, the counterclockwise rotation of the erasing head support lever 38, which causes the above-mentioned rightward movement of the slide operation button 54, is performed by the forced retraction drive projection 62 of the slide operation button 54. Forcibly retracted passive projection 58 at the left end of erase head support lever 38 with respect to the aforementioned inner surface.
Are not prevented by the collision of the outwardly protruding ends of the.

When the movement of the slide-type operation button 54 to the first position to the right (recording mode setting position) is completed,
The erasing head support lever 38, which has been rotated in the counterclockwise direction by the forcedly pushing passive projection 56 being pressed by the forcibly pushing driving projection 60 of the sliding operation button 54, also stops the above rotation, and the torsion coil spring 42 The stop position is determined by the outer edge of the forcibly pushed passive projection 56 abutting on the forcibly pushed drive projection 60 by the urging force. A contact spring 46 provided at the right end of the erasing head support lever 38 causes the elastic contact 46a to contact the stop column 24 on the upper surface of the main chassis 10, as shown in FIG. The bending elastic contact 46a presses the stop column 24 by its elastic force. Further, the contact spring 46 is separated from the contact spring supporting and retaining projection 38b of the erasing head supporting lever 38.

Here, the erasing head 44 on the erasing head supporting lever 38 enters the head insertion window (not shown) of the tape cassette and comes into contact with the magnetic tape 64 in the tape cassette.

The contact of the resilient contact 46a of the contact spring 46 on the erasing head support lever 38 with the stop column 24 on the main chassis 10 is achieved by a tape recorder (not shown) as described above.
An electric circuit in the main body of the magnetic tape is controlled so that an audio signal to be recorded on the magnetic tape 64 is supplied to the recording / reproducing head 16 from the amplifier circuit in the electric circuit which has already been switched for recording. For example, the electric circuit immediately supplies an audio signal to the recording / reproducing head 16 when the elastic contact 46a comes into contact with the stop column 24 (that is, immediately after the mechanical system and the electric system for recording have been set). . The supply of the audio signal to the recording / reproducing head 16 can be delayed as necessary.

The slide-type operation button 54 is used to turn on / off the electric circuit in the main body of the tape recorder (not shown).
The off switch is interlocked, and the motor on / off switch is turned on by the arrangement of the slide type operation button 54 at the recording mode setting position, and the mode in the main body of the above-mentioned tape recorder (not shown) is turned on. The rotation of the rotary shaft in a predetermined direction at a predetermined speed.

The rotation of the rotating shaft of the motor is controlled by the capstan 36.
Is rotated clockwise in FIG. 4 at a predetermined speed, and the reel shaft 12 on the left side in FIG. 1 is driven clockwise at a predetermined speed. As a result, the magnetic tape 64 is moved from the reel hub (not shown) mounted on the reel shaft 12 on the right side in FIG.
The tape is wound around a reel hub (not shown) mounted on the reel shaft 12 at a predetermined speed. During this time, the magnetic recording surface, on which the magnetic recording signal has been once erased by the erasing head 44, has a tape recorder (not shown). Sound input from a microphone provided in the main body is magnetically recorded by a recording / reproducing head 16 functioning as a recording head.

That is, in the above-described embodiment, the contact spring 46 supported by the erasing head supporting lever 38 and the stop column 24 on the main chassis 10 correspond to the erasing head supporting lever.
A recording timing switch mechanism called a transient switch or a mute switch for controlling the recording start timing in accordance with the movement of the 38 to the operating position (contact position).

Next, when the sliding operation button 54 is returned from the recording mode setting position shown in FIG. 4 to the stop mode setting position shown in FIG. The motor on / off switch turns off and the motor
Stops rotation of the rotating shaft. Thus, the above-described running of the magnetic tape 64 is stopped. The above-described amplifier circuit changeover switch linked to the slide operation button 54 controls the electric circuit so as to stop the recording / reproducing head 16 from functioning as a recording head.

The return of the slide operation button 54 is performed by forcibly pressing the left end of the erasing head support lever 38 by the above-mentioned inner surface that is inclined leftward and obliquely outward of the forced retraction drive projection 62 of the slide operation button 54. Pressing of the outwardly projecting end of the retracted passive projection 58 causes the pressing force and the urging force of the torsion coil spring 42 to move the erasing head support lever 38 from the operating position (contact position) shown in FIG. Move to the rest position (non-contact position). Further, the pinch roller support lever 28 is also provided with the slide lever 5 of the slide operation button 54.
The rotation restriction by the cam surface (not shown) of 4a described above is reset, and it moves from the operating position (contact position) shown in FIG. 4 to the rest position or standby mode setting position (non-contact position) shown in FIG. .

In the initial stage of the movement of the slide type operation button 54 from the recording mode setting position to the stop mode setting position, the elastic contact 46a of the contact spring 46 on the erasing head supporting lever 38 is connected to the main chassis. Since the supply of the audio signal from the microphone to the recording / reproducing head 16 is stopped at a distance from the stop column 24 on the recording head 10, the so-called transient noise generated by the above-mentioned movement of the slide operation button 54 thereafter is reduced to a magnetic field. Not recorded in the loop 64.

Next, when the slide type operation button 54 is moved from the rest position (stop mode setting position) shown in FIG. 3 to the first left movement position (reproduction mode setting position), The pinch roller support lever 28 is released from the rotation restriction by the cam surface (not shown) of the slide lever 54a of the slide type operation button 54, and the pinch roller as shown in FIG. The magnetic tape 64 is pressed onto the capstan 36 by the roller 30, and the pinch roller 30 cooperates with the capstan 36 to clamp the magnetic tape 64.

The aforementioned inner surface of the forced retraction engagement projection 62 of the sliding operation button 54 moved as described above is located below the outwardly protruding end of the forced retraction passive projection 58 on the left end of the erasing head support lever 38. As the slide operation button 54 moves, the erase head support lever-3
8 does not move from the rest position (non-contact position) shown in FIG.

By the movement of the slide type operation button 54, the amplifier circuit in the electric circuit of the tape recorder is switched for reproduction, and the recording / reproducing head 16 functions as a reproducing head.

The arrangement of the slide-type operation button 54 at the reproduction mode setting position causes the motor on / off switch to be turned on, and the mode in the main body of the above-mentioned tape recorder (not shown).
The rotation of the rotary shaft in a predetermined direction at a predetermined speed.

The rotation of the rotating shaft of the motor is controlled by the capstan 36.
Is rotated clockwise in FIG. 3 at a predetermined speed, and the reel shaft 12 on the left side in FIG. 1 is driven clockwise at a predetermined speed. As a result, the magnetic tape 64 is moved from the reel hub (not shown) mounted on the reel shaft 12 on the right side in FIG.
The recording / reproducing head 16 functioning as a reproducing head is wound around a reel hub (not shown) mounted on the reel shaft 12 at a predetermined speed, and the information recorded on the magnetic recording surface of the magnetic tape 64 is recorded. Is detected, and the detected information is transmitted to a speaker provided on the main body of the above-mentioned tape recorder (not shown).
The music is played back through the microphone or an earphone connected to the main body.

The slide type operation button 54 is moved from the rest position (stop mode setting position) shown in FIG. 3 to the second leftward movement position (early rewind mode setting position). The fast-rewind mode set in the above-described not-shown tape recorder, or the above-noted not-shown tape is pressed by pressing the fast-forward button 52 from the rest position shown in FIG.
The fast-forward mode set in the precoder is irrelevant to the operation of the recording timing control device according to one embodiment of the present invention, and will not be described.

In the above-mentioned tape recorder (not shown), the eject button 50 can be pressed only when the slide operation button 54 is located at the rest position (stop mode setting position) shown in FIG. The cassette lid can be moved to the open position as described above by being pressed. When the cassette lid moves to the open position, the tape cassette in the kangar pocket of the cassette lid is also discharged from the tape cassette storage recess.

In the above-described embodiment, the contact spring 46 is disposed on the elongated erase head supporting lever 38 at the end opposite to the rotation center axis 40, and is sufficiently away from the rotation center axis 40. Therefore, when the erasing head support lever 38 rotates around the rotation center axis 40 between the rest position (non-operation position) and the contact position (operation position), the main chassis 10 is rotated.
The switching speed between the contact state of the contact spring 46 with the upper stop post 24 and the separated state is high. For this reason, the control of the recording timing can be performed more precisely. This invention is not limited to the above-described embodiment.

For example, the stop column 24 is provided for the main chassis 10.
It can also be constructed by standing up like a side wall 10a. In this case, there is no need to prepare an independent part for the stop post 24, assemble it to the main chassis 10, and manage inventory.

The stop column 24 is a recording / reproducing head supporting lever-1.
The stopper of the recording / reproducing head support lever 14 is provided on the main chassis 10 independently of the stop column 24, and the stop column 24 is used only for the contact of the contact spring 46. Can also be provided. However, it is apparent that the use of the stop post 24 as a stopper of the recording / reproducing head support lever 14 can reduce the number of components, simplify assembly, and facilitate component inventory management.

In contrast to the above-described embodiment, the stop column 24 is insulated from the main chassis 10 and the taper 24 is fixed.
By electrically connecting to the electric circuit of the precoder and by grounding the contact spring 46 to the main chassis 10, a switch mechanism which functions in the same manner as in the above-described embodiment is constituted. I can do it.

In the above-described embodiment, the electric contact members such as the stop post 24 and the contact spring 46 constituting the switch mechanism for controlling the recording timing are relative to the main chassis 10 and to the main chassis 10. Although it is arranged separately on the erasing head supporting lever 38 which is rotatable,
Both electric contact members are disposed only on either the main chassis 10 or the erasing head supporting lever 38, and the erasing head supporting lever 38 is disposed at the contact position (operating position), so that the switch is turned on. It can also be configured to do so. In short, any configuration is possible as long as the switch mechanism operates in response to the erasing head supporting lever.

As described in detail above, in the recording timing control device of the tape recorder according to one embodiment of the present invention, the recording mode setting is closely related, and accurate positioning for recording is performed. Erase head mounted
The erasing head support lever 38 as a member is
4 has been moved to the first position where it has been brought into contact with the magnetic tape 64 by the switch mechanism of the recording timing control switch constituted by the contact spring 46 and the stop post 24 .
Detected Ri, the switch mechanism as the result, the audio signal to be recorded on the magnetic tape, since from the amplifier circuit is switched to the recording and controls the timing of supplying the recording and reproducing head, the recording It is easy to set the start timing to a desired state. Further, the slide operation button 54 as an operation member for recording mode setting
Erase head support as erase head mounting member by operation
By configuring the lever 34 to rotate, highly accurate recording timing control can be performed while securing the degree of freedom in design.

[0062]

[Effect of the invention] Oite recordings timing control system for a tape recorder according to this invention is, without a complicated adjustment work during assembly to obtain desired recording start timing,
As a result, the problem of recording transient noise is eliminated.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing a main part of a tape recorder provided with a recording timing control device according to an embodiment of the present invention in a stop mode setting state.

FIG. 2 includes (a) and (b), where (a) is a plan view showing an enlarged main part of the recording timing control device of FIG. 1;
(B) is a right side view of an enlarged main part of (a).

FIG. 3 shows a main part of the tape recorder shown in FIG. 1 in a standby mode.
FIG. 3 is a plan view schematically showing a state in which a mode is set.

FIG. 4 is a plan view schematically showing a main part of the tape recorder of FIG. 1 in a recording mode setting state.

[Explanation of symbols]

Reference numeral 24: stop column (switch mechanism), 38: erase head support lever, 44: erase head, 46: contact spring (switch mechanism), 54: slide operation button, 64: magnetic tape.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-81506 (JP, A) JP-A-52-13307 (JP, A) Actually open Showa 54-118110 (JP, U) Actually open 42228 (JP, U) Japanese Utility Model 57-94647 (JP, U) Japanese Utility Model 49-5050211 (JP, U)

Claims (3)

(57) [Scope of request for utility model registration] An operating member for setting a recording mode and an erasing head mounted thereon, wherein the operating member for setting a recording mode is provided.
And the recording mode setting operation section
By moving the timber between a first position and erasing head mounting member which is supported so as to pivot between a second position spaced from said tape in which the erase head is in contact with the magnetic tape, the From the center of the rotation of the erasing head mounting member,
At a position farther from the center of rotation than the distance to the joint
And a switch mechanism for controlling the timing of the start of recording in accordance with the rotation of the erasing head mounting member to the first position when the recording mode is set. Recording timing control device. 2. A for recording mode setting operation member by the operation of the recording mode setting operation member, and the amplifier circuit changeover switch for switching the amplifier circuit for recording or reproducing, erasing head is mounted, the recording mode Operating member for setting
And the recording mode setting operation section
By moving the timber between a first position and erasing head mounting member which is supported so as to pivot between a second position spaced from said magnetic tape in which the erase head is in contact with the magnetic tape, the From the center of the rotation of the erasing head mounting member,
At a position farther from the center of rotation than the distance to the joint
When the recording mode is set, the erase head
In response to the rotation of the mounting member to the first position,
After switching the tape circuit for recording,
The audio signal to be recorded is recorded and played back from the amplifier circuit.
And a switch mechanism for controlling the timing of recording start by supplying the recording timing to the tape recorder. 3. A for recording mode setting operation member by the operation of the recording mode setting operation member, and the amplifier circuit changeover switch for switching the amplifier circuit for recording or reproducing, erasing head is mounted, the recording mode Operating member for setting
And engaged through an engagement portion, the recording mode setting operation unit
By moving the timber between a first position and erasing head mounting member which is supported so as to pivot between a second position spaced from said magnetic tape in which the erase head is in contact with the magnetic tape, the From the center of the rotation of the erasing head mounting member,
At a position farther from the center of rotation than the distance to the joint
The provided contact portion and the erase head mounting member are
A stop portion that contacts the contact portion at the rotation position,
When the mode is set, the contact state between the contact section and the stop section
Based on the above, after switching the amplifier circuit for recording
The audio signal to be recorded on the magnetic tape
Start recording by supplying from circuit to recording / playback head
And a switch mechanism for controlling the timing of the recording timing control device of the tape recorder.