JPH04126335U - Tape recorder recording timing control device - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of the present invention is to provide a recording timing control device for a tape recorder that can control a desired recording start timing without requiring complicated adjustment work. do. [Structure] A contact spring 46 is installed on the erasing head support lever 38 that brings the erasing head 44 into and out of contact with the magnetic tape 64. - The stop post 24 mounted on the seat 10 is made of electrically conductive material. The erasing head support lever moves the erasing head to a position where it contacts the magnetic tape, thereby bringing the contact spring into contact with the stop column, and this contact controls the electric circuit so that the recording/reproducing head 16 functions as a recording head. , the audio signal to be recorded on the magnetic tape is supplied from the electric circuit to the recording/reproducing head 16.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a recording timing control device for a tape recorder.

0002

[Conventional technology]

In conventional tape recorders, the recording mode can be changed from another mode using an operating member. Mechanical noise generated when switching to the magnetic head is recorded on the magnetic tape via the magnetic head. To prevent this from being recorded, a switch called a transient switch is installed. controls the recording start timing. Furthermore, this transient switch In order to operate, there is a sliding operation button that sets the recording mode, and a push button is linked. A rotary lever is provided that rotates with the rotation.

0003 When setting the recording mode, use the rotating lever mentioned above to turn the transient switch. After operating the pinch roller, you can move the pinch roller by completing the operation of the sliding operation button, etc. Immediately after the mechanical system is set up and the electrical system is set to recording mode, start recording from the electrical system. The signal to be recorded is supplied to the sound head.

0004

[Problem that the idea aims to solve]

In conventional tape recorders such as those mentioned above, the transient switch is In order to operate at the appropriate timing, the rotary lever has a predetermined relationship with the operating member. The adjustment work was complicated.

[0005] This idea was made under the above circumstances, and allows for the desired recording without the need for complicated adjustment work. Recording timing control for tape recorders that can control the sound start timing The goal is to provide equipment.

[0006]

[Means to solve the problem]

In order to achieve the above-mentioned purpose of this invention, a tape recorder according to this invention was developed. The recording timing control device is equipped with an erasing head using a permanent magnet. a first position where the card is in contact with the magnetic tape and a second position where the card is separated from the magnetic tape; an erase head lever movable between the erase head lever and the erase head lever to a first position; Equipped with a switch mechanism that controls the timing of recording start as you move. It is a feature.

[0007]

[Effect]

A tape recorder according to this invention is characterized by being constructed as described above. In Da's recording timing control device, an erasing head using a permanent magnet is mounted. a first position where the erasing head contacts the magnetic tape and a position where the erasing head is separated from the magnetic tape; an erase head lever movable between the second position and the first position; The switch mechanism controls the timing of recording start.

[0008]

【Example】

The plan view of FIG. 1 shows a recording timing control device according to an embodiment of this invention. The main parts of the tape recorder obtained are schematically shown in a stop mode setting state.

[0009] The above main part is made of metal that constitutes the bottom plate of the tape cassette storage recess of the tape recorder. The main chassis 10 has a rectangular flat plate shape. The tape recorder above has a microphone. Using a tape cassette called a cassette, the upper surface of the main chassis 10 is At approximately the center of the tape cassette is a pair of reel hubs that are inserted into and engaged with a pair of reel hubs. - A wheel shaft 12 is supported.

0010 One side edge (lower edge in Figure 1) of the main chassis 10 has an upper edge (perpendicular to the plane of the paper in Figure 1). A side wall 10a is formed that stands up in the direction of the main A recording/reproducing head support extending along the side wall 10a is provided at one side edge of the upper surface of the chassis 10. A lever 14 is arranged. The recording/reproducing head support lever 14 is located at the center in its longitudinal direction. A recording/reproducing head 16 with a tape guide 16a is supported on the right side, and the longitudinal direction The center left side of the direction can be freely rotated on the top surface of the main chassis 10 by the rotation center shaft 18. installed.

[0011] The left end of the recording/reproducing head support lever 14 is an opening formed in the main chassis 10. An engaging protrusion 14a protrudes from the bottom surface of the main chassis 10 via the main chassis 10b. The engaging protrusion 14a is rotatably attached to the lower surface of the main chassis 10. It is engaged with an engagement hook 20a at one end of the engagement lever 20.

0012 The other end of the engagement lever 20 projects toward the upper surface of the main chassis 10 through the opening 10b. The engagement lever 20 is connected to the main chassis. 10 is biased to the above-mentioned engagement position by a torsion coil spring 22 supported on the upper surface of the It is. The cassette detection section 20b is a tape cassette storage recess of the tape recorder. The engagement lever 20 is twisted and the coil spring is pressed by the tape cassette stored in the It is rotated clockwise from the above-mentioned engagement position against the biasing force of the screw 22. engagement This rotation of the lever 20 causes the engagement protrusion 14a on the left end of the recording/reproducing head support lever 14 to The engagement of the engagement hook 20a at one end of the engagement lever 20 is released.

[0013] At the right end of the recording/reproducing head support lever 14, there is a hole (not shown) between it and the main chassis 10. A tension coil spring is stretched around it, and the recording/reproducing head support lever 14 is The rotation center axis 18 is rotated by the biasing force of the tension coil spring in the direction shown by arrow A. It is biased to rotate clockwise. Recording/playback head support lever 14 Measles However, due to the above-mentioned engagement with the engagement lever 20, the above-mentioned biasing force is resisted as shown in FIG. held in the stopped position.

[0014] On the upper surface of the main chassis 10, inward from the right end of the recording/reproducing head support lever 14. (Upper in Figure 1) is a stop of conductive material fixed to the top surface of the main chassis 10. A pillar 24 is located there. In this embodiment, the stop column 24 is made of gold-plated steel rod. It is formed and grounded to the main chassis 10.

[0015] The recording/reproducing head supporting lever 14 is located in the center area of the upper surface of the recording/reproducing head supporting lever 14. The rotation center shaft 2 is fixed to the upper surface of the main chassis 10 near the rotation center shaft 18 of the main chassis 10. A pinch roller support lever 28 rotatably supported at 6 is disposed. pin The tyro roller support lever 28 is connected to its rotation center shaft 26 and the recording/reproducing head support lever 14. A pinch roller 30 is rotatably supported between the recording and reproducing head 16. pinchiro - The roller support lever 28 is wound around the rotation center shaft 26 and the pinch roller support lever 2 8 and the side wall 10a of the main chassis 10. 32 is biased counterclockwise around the rotation center axis 26, but during rotation A stop claw 28a extending from the central shaft 26 into the opening 10b of the main chassis 10 The torsion coil spring is activated by contacting the left end of the inner edge of the head support lever 14. It is held at the stop position shown in FIG. 1 against the urging force of 32.

[0016] The pinch roller support lever 28 is connected to the recording/reproducing head support lever 14 and the pinch roller. The recording/reproducing head support lever 14 and the main shaft are moved approximately along the rotating direction of the support lever 28. - To the bottom side of the main chassis 10 through the elongated through hole formed in the chassis 10. Insert the protruding pinch roller control pin 28b near the rotation center axis of the pinch roller 30. has.

[0017] The recording/reproducing head support lever 14 and the pinch roller are supported on the top surface of the main chassis 10. The inner edge of the recording/reproducing head support lever 14 is located between the lever 28 and the pair of reel shafts 12. A pair of cassette positioning pins 34 spaced apart from each other in the direction along the The pinch roller 30 moves inwardly between the pair of cassette positioning pins 34. A capstan shaft 36 rotatably supported by the main chassis 10 is arranged on the trace. has been done.

[0018] The outer edge of the right end of the recording/reproducing head support lever 14 on the upper surface of the main chassis 10 (Fig. 1, there is a gap along the side wall 10a between the lower edge) and the side wall 10a of the main chassis 10. An extended erase head support lever 38 is disposed. Erase head support lever 3 8 is formed by integral molding of synthetic resin, and includes a recording/reproducing head 16 and a pinch roller 30. The left end near the main chassis 10 is rotated on the rotation center shaft 40 fixed to the top surface of the main chassis 10. Supported for free movement. The erasing head support lever 38 is wound around the rotation center shaft 40. Both ends are hooked onto the side wall 10a of the main chassis 10 and the erasing head support lever 38. Clockwise around the rotation center axis 40 due to the biasing force of the handed torsion coil spring 42 By contacting the side wall 10a, the torsion coil spring 42 It is held at the stop position shown in FIG. 1 against the urging force of.

[0019] The right end of the erasing head support control lever 38 is located above the recording/reproducing head support lever 14. It protrudes toward the inside (upward in FIG. 1) of the chassis 10, and the protruding end has a An erasing head 44 constituted by a permanent magnet is supported. The right edge above is blank. Adjacent to the removal head 44, a plate-shaped metal conductive material is pressed into a shape. A contact spring 46 is attached. In this embodiment, the contact spring 46 is Made of bronze and plated with gold. 2(a) and (b) show the contact point at the right end of the erasing head support lever 38. The support structure for spring 46 is shown enlarged.

[0020] A right end portion of the erasing head support lever 38 is provided to firmly hold the base end of the erasing head 44. In order to A raised erase head receiving block 38a is formed. Erase head holder From block 38a, on the main chassis 10, as shown particularly best in FIG. The contact spring support locking protrusion 38b protrudes to the right at a position higher than the stop column 24. ing.

[0021] The contact spring 46 has a substantially U-shaped planar shape, as particularly shown in FIG. 2(a). In the space surrounded by the curved part, an eraser is placed on the upper surface of the right end of the eraser head support lever 38. A contact spring holder is formed outside and adjacent to the head receiving block 38a. The mounting pin 38c is inserted through the mounting pin 38c. One piece of the approximately U-shaped contact spring 46 is removed. A contact spring support locking protrusion is provided along the outward facing rising surface of the pad receiving block 38a. It extends onto the outer surface of the raised part 38b, and the extending end is as shown particularly in FIG. 2(b). The erase head receiving block 38a is branched upward and downward, and the lower branch is elastic. This constitutes a contact point 46a.

[0022] The other piece of the approximately U-shaped contact spring 46 is attached to the above-mentioned vertical position of the erasing head receiving block 38a. Along the rising surface, cut the upper surface of the right end of the erasing head support lever 38 in the same way as the above piece. After extending, along another contact spring mounting pin 38d formed on the upper surface. direction away from the rising surface of the erase head receiving block 38a (main shaft) - It is bent outward on the upper surface of the sheet 10. Another contact spring remover The upper end of the mounting pin 38d is in contact with the upper edge of the outwardly bent end of the other piece of the contact spring 46. The contact spring 46 is raised from the upper surface of the right end of the erase head support lever 38. A floating prevention collar 38e is formed to prevent this.

[0023] As mentioned above, the erase head receiving block 38a, the contact spring support locking protrusion 38b, etc. A contact spring mounting pin 38c and another contact spring mounting pin 38d are formed. For the upper surface of the right end of the erasing head support lever 38 that has been A U-shaped contact spring 46 can be attached.

[0024] First, pinch both halves of the approximately U-shaped contact spring 46 and place the halves of the contact spring 46 close together. The spring 46 is brought closer to the upper surface of the right end from above the right end, and the contact spring 46 is Cover the space surrounded by the curved part over the contact spring mounting pin 38c on the upper surface of the right end part. Ru. Next, release the pinching force applied to both pieces of the contact spring 46 to release the two pieces from approaching each other. Then, the above-mentioned piece has a contact spring support locking protrusion as shown in FIGS. 2(a) and 2(b). The other piece is placed at a predetermined position on the outer surface of the riser 38b, and another contact point is placed on the other piece. It is latched onto the spring mounting pin 38d as described above.

[0025] At the outer bent end of the other piece of the contact spring 46 is a tape recorder (not shown). A conductive wire 48 is connected which is electrically connected to an electric circuit in the main body. And extinguish The head support lever 38 is rotated inward of the main chassis 10 as will be detailed later. The elastic contact 46a of the contact spring 46 contacts the stop column 24 on the main chassis 10. In order to cause the recording/playback head 16 to function as a recording head when grounded, The signal to be recorded on the magnetic tape in the electrical circuit is switched for recording in the electrical circuit. control so that the signal is supplied to the recording/reproducing head 16 from the amplifier.

[0026] That is, the contact spring 46 and the stop column 24 are connected when the tape recorder is set to the recording mode. When the circuit is switched for recording in the electrical circuit before they come into contact with each other, The timing at which the signal to be recorded on the magnetic tape is supplied from the amplifier to the recording/reproducing head 16 It is called a so-called transient switch or mute switch to control It consists of a recording timing control switch. And the elasticity of the contact spring 46 When the contact 46a is in contact with the stop column 24, it is cut off for recording in the electric circuit. The audio signal from the amplifier being replaced is supplied to the recording/playback head 16, and the contact spring 4 When the elastic contact 46a of No. 6 is separated from the stop column 24, the The audio signal from the amplifier that is switched for recording is not supplied to the recording/playback head 16. It controls the recording timing.

[0027] As shown in FIG. 1, on the bottom surface of the main chassis 10, there is a Eject lever 50a having an eject button 50 protruding outward from the side wall 10a A fast forward lever 52a having a fast forward button 52 and a fast forward lever 52a are arranged. A sliding operation button 54 protrudes outward from the side wall 10a from the right end of one side edge. A slide lever 54a is arranged. In FIG. 1, the eject button 50, The fast forward button 52 and the sliding operation button 54 are each placed at the rest position. The tape cassette is stored in the tape cassette storage recess of the tape recorder mentioned above. Not yet.

[0028] The sliding operation button 54 moves one step to the right and two steps to the left from the rest position. The rest position above, the first stage on the right, and the first stage on the left are shown in the diagram. It is held with a predetermined force by a click mechanism. There is a slider in the second row on the left. The slide lever is activated by the finger force of the tape recorder operator applied to the manual operation button 54. - Diagram of the tape recorder stretched between 54a and the bottom surface of the main chassis 10 It can be held against the biasing force of biasing means (not shown).

[0029] In this embodiment, the rest position of the sliding operation button 54 is set to the stop mode. The first position on the right is the recording mode setting position, and the first position on the left is the recording mode setting position. The movement position of the first row is the playback mode setting position, and the movement position of the second row on the left is This is the fast rewind mode setting position.

[0030] The slide lever 54a has an amplifier circuit in the electrical circuit of the tape recorder for recording. Or an amplifier circuit selection switch called a slide switch for switching for playback. are connected, and the amplifier circuit selector switch has a sliding operation button 54 that controls the recording mode. When placed at the mode setting position, the amplifier circuit is switched to recording mode and the playback mode setting position is set. switch the amplifier circuit for playback when placed in the

[0031] The sliding operation button 54 is located at the center of rotation 40 at the left end of the erasing head support lever 38. The left end of the erasing head support lever 38 is located opposite to the left and right sides of the rotation center shaft 40. Forcibly extruded passive protrusions 56 protruding from both sides toward the sliding operation button 54 and strong A retraction passive protrusion 58 is formed.

[0032] The sliding operation button 54 is a forced push-out receiver on the left end of the erasing head support lever 38. A forced extrusion driving protrusion 60 and a forced retraction passive protrusion contacting the left edge of the movable protrusion 56 58 with a forced retraction drive protrusion 62 facing the outwardly protruding end of 58 with a slight gap therebetween. is formed. In this case, the forced retraction drive protrusion 62 serves as an erase head support. Through a slight gap to the outward protruding end of the passive protrusion 58 of the holding lever 38 The opposing inner surfaces are inclined diagonally outward to the left in the figure. Next, recording timing control according to an embodiment of this invention configured as described above. The operation of the device will be described in detail with reference to FIGS. 3 and 4.

[0033] In a tape recorder equipped with the recording timing control device described above, the tape cassette The opening of the cassette storage recess is covered with a kangaru-pocket type cassette lid. This cassette lid can be moved to the open position by pressing the eject button 50. I can do that. In the open position, place it in the kangal pocket of the cassette lid in the specified position. If you move the cassette lid to the closed position after installing the specified tape cassette, the tape cassette will close. The tape cassette can be stored in the set storage recess. main shear An engagement lever protrudes from the opening 10b of the chassis 10 toward the upper surface of the main chassis 10. At this time, the cassette detection section 20b of 20 is pressed against the tape cassette. do The engagement lever 20 moves from the engagement position shown in FIG. 1 against the biasing force of the torsion coil spring 22. Rotate clockwise to engage 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 engagement lever 20 with respect to the protrusion 14a is released. Ru.

[0034] Then, the recording/reproducing head support lever 14 is moved by a puller (not shown) connected to the right end. counterclockwise around its own rotation center axis 18 due to the biasing force of the coil spring in the direction of arrow A. Rotate in the direction. This rotation of the recording/reproducing head support lever 14 is performed at the right end of its inner edge. As shown in FIG. 3, the main chassis 10 is and stop. Here, there are one pair of recording/reproducing heads 16 on the recording/reproducing head support lever 14. into the head insertion window (not shown) of the tape cassette together with the tape guide 16a. It enters and comes into contact with the magnetic tape 64 in the tape cassette.

[0035] The pinch roller support lever 28 is located between itself and the side wall 10a of the main chassis 10. The recording/reproducing head support lever 14 is It rotates counterclockwise around its own rotation center axis 26 following the above-mentioned rotation of . The pinch roller control pin 28b at the right end of the pinch roller support lever 28 is connected to the recording/playback The slide moves through the aforementioned through hole of the head support lever 14 and the main chassis 10. It hits the cam surface (not shown) formed on the slide lever 54a of the manual operation button 54. When the pinch roller 30 comes into contact with the magnetic tape 64, the pinch roller - The rotation of the support lever 28 is stopped. Pinch roller support lever 28 saw The position is the standby position. In this way, in the above tape recorder, a predetermined tape cassette is stored in the tape cassette storage recess. Standby mode is automatically set just by storing the set.

[0036] Next, move the sliding operation button 54 to the rest position (stop mode setting position) shown in FIG. If you move it from to the first position on the right (recording mode setting position), the pinch The roller support lever 28 is the same as the slide lever 54a of the slide operation button 54. The rotation restriction by the cam surface (not shown) is released, and the pinch roller 30 is rotated as shown in FIG. Press the magnetic tape 64 onto the capstan 36, and the pinch roller 30 The magnetic tape 64 is held in cooperation with the tongue 36.

[0037] The sliding operation button 54, which is moved as described above, is forced to push out the drive protrusion 60. Then move the left edge of the forced extrusion passive protrusion 56 on the left end of the erasing head support lever 38 to the right. This causes the erase head support lever 38 to move between itself and the main chassis 10. against the biasing force of the torsion coil spring 42 stretched between the side wall 10a of the It is pressed in a counterclockwise direction around the rotation center axis 40 of.

[0038] The erasing head support lever 3 tries to rotate counterclockwise due to this pressing force. 8 indicates that the slide operation button 54 is moved to the right as described above. The above-mentioned inner surface that is inclined diagonally outward to the left of the forced retraction drive protrusion 62 of the operation button 54 The outside of the forcibly retractable passive protrusion 58 on the left end of the erase head support lever 38 at the top. The opposing position of the protruding end moves from the right end to the left end on the inside surface, so turn it counterclockwise. By rotating in the direction, the outward protruding end of the forced retraction passive projection 58 slides This prevents the forced retraction drive protrusion 62 of the operation button 54 from coming into contact with the inclined inner surface. It has been stopped.

[0039] That is, the erasing head caused by the above-mentioned rightward movement of the sliding operation button 54 The counterclockwise rotation of the support lever 38 is achieved by forcibly pulling the sliding operation button 54. The left end of the erasing head support lever 38 is aligned with the inner surface of the drive projection 62. The forced retraction is not prevented by the collision of the outwardly protruding end of the passive protrusion 58.

[0040] Move the sliding operation button 54 to the first step position on the right (recording mode setting position). When the movement is completed, the forced push-out drive protrusion 60 of the sliding operation button 54 forces the The erasing head was being rotated counterclockwise by being pressed by the push-out passive protrusion 56. The support lever 38 also stops rotating, and is moved by the biasing force of the torsion coil spring 42. The outer edge of the forced extrusion passive protrusion 56 comes into contact with the forced extrusion drive protrusion 60 The stopping position is determined by In addition, the erase head support lever 38 has a As shown in FIG. 4, the contact spring 46 that has been This contact causes the contact spring 46 to bend and become an elastic contact. 46a is pressed against the stop column 24 by its elastic force. Furthermore, the contact spring 46 The erase head support lever 38 is separated from the contact spring support locking protrusion 38b.

[0041] Here, the erasing head 44 on the erasing head support lever 38 is attached to the tape cover mentioned above. The magnetic tape 64 in the tape cassette entered the head insertion window (not shown) of the set. comes into contact with.

[0042] The contact on the erase head support lever 38 to the stop post 24 on the main chassis 10 The elastic contact 46a of the point spring 46 comes into contact with the tape recorder (not shown) as described above. It controls the electric circuit in the main body and sends the audio signal to be recorded on the magnetic tape 64 to the electric circuit. The signal is supplied to the recording/playback head 16 from an amplifier circuit that has already been switched for recording on the road. let For example, in the above electric circuit, the elastic contact 46a is in contact with the stop column 24 (i.e., Immediately after the mechanical and electrical systems for recording have been set up) The audio signal is supplied to the recording/reproducing head 16. Note that the audio signal is supplied to the recording/playback head 16. can be delayed if necessary.

[0043] The sliding operation button 54 is connected to the electrical circuit in the main body of the tape recorder (not shown). The motor on/off switch on the road is linked, and the slider to the recording mode setting position The motor on/off switch is turned on by the arrangement of the idle type operation button 54, as shown in the diagram above. The motor in the main body of the tape recorder rotates the rotating shaft in a predetermined direction at a predetermined speed. make it turn

[0044] The rotation of the rotary shaft of the motor is performed by rotating the capstan 36 clockwise in FIG. 4 at a predetermined speed. At the same time, the left reel shaft 12 in Fig. 1 is rotated at a predetermined speed. Drive in a clockwise direction. As a result, the magnetic tape 64 is attached to the tape cassette. The reel on the left side is connected from the reel hub (not shown) attached to the reel shaft 12 on the right side in FIG. The reel is wound at a predetermined speed onto a reel hub (not shown) attached to the reel shaft 12. In the meantime, the magnetic recording signal is erased by the erasing head 44 on the magnetic recording surface, as shown in the figure above. Sound input from a microphone installed in the main body of a tape recorder (not shown) is magnetically recorded by a recording/reproducing head 16 functioning as a recording head.

[0045] That is, in the embodiment described above, the contact supported by the erasing head support lever 38 is The point spring 46 and the stop post 24 on the main chassis 10 are connected to the erase head support lever 38. The so-called recording start timing is controlled by the movement of the Recording timing switch called transient switch or mute switch It constitutes a switch mechanism.

[0046] Next, move the slide operation button 54 from the recording mode setting position shown in FIG. 4 to the stop position shown in FIG. When the stop mode is returned to the setting position, the above-mentioned The motor on/off switch is turned off and the aforementioned motor stops rotating the rotating shaft. Ru. As a result, the above-described running of the magnetic tape 64 is stopped. In addition, the slide type operation The aforementioned amplifier circuit changeover switch linked to the operation button 54 switches the recording/playback head 16 for recording. The electric circuit is controlled to stop functioning as a sound head.

[0047] The above-mentioned return of the sliding operation button 54 is a forced retraction drive of the sliding operation button 54. The erasing head support lever is formed by the above-mentioned inner surface that is inclined diagonally outward to the left of the movable projection 62. The forced retraction of the left end of the The erasing head support lever 38 is moved by the pressing force of Move from the operating position (contact position) shown in Figure 4 to the rest position (non-contact position) shown in Figure 3. move. Furthermore, the pinch roller support lever 28 is also slid by the sliding operation button 54. The rotation restriction by the aforementioned cam surface (not shown) of the lever 54a is reset, as shown in FIG. from the operating position (contact position) to the rest position or standby mode setting position shown in Figure 3. (non-contact position).

[0048] It should be noted that the sliding operation button 54 is moved from the recording mode setting position to the stop mode setting position. The elastic contact 46 of the contact spring 46 on the erasing head support lever 38 during the initial stage of the movement a is separated from the stop column 24 on the main chassis 10 and is connected to the recording/playback head from the microphone. Since the supply of audio signals to the keyboard 16 is stopped, the sliding operation button 54 will no longer be activated. The so-called transient noise generated with the above movement of the magnetic tape 64 is Not recorded.

[0049] Next, move the sliding operation button 54 to the rest position (stop mode setting position) shown in FIG. If you move from the left side to the first movement position (playback mode setting position) The roller support lever 28 is the same as the slide lever 54a of the slide operation button 54. The rotation restriction by the cam surface (not shown) is released, and it is the same as when setting the recording mode described above. Then, as shown in FIG. 4, press the magnetic tape 64 onto the capstan 36 using the pinch roller 30. The pinch roller 30 cooperates with the capstan 36 to pinch the magnetic tape 64. Ru.

[0050] The forced retraction engagement protrusion 62 of the sliding operation button 54 is moved as described above. The aforementioned inner surface is the forcibly retractable passive protrusion 58 at the left end of the erasing head support lever 38. As the sliding operation button 54 is moved, it passes under the outwardly projecting end of the button. The erase head support lever 38 moves from the rest position (non-contact position) shown in FIG. Never.

[0051] In addition, by the above-mentioned movement of the sliding operation button 54, the electrical circuit of the tape recorder is The amplifier circuit is switched to playback, and the recording/playback head 16 functions as a playback head. .

[0052] The arrangement of the sliding operation button 54 to the playback mode setting position is the motor on/off position. The switch is turned on, and the motor in the main body of the tape recorder (not shown) is activated. Rotate the rotating shaft in a predetermined direction at a predetermined speed.

[0053] The rotation of the rotary shaft of the motor is performed by rotating the capstan 36 clockwise in FIG. 3 at a predetermined speed. At the same time, the left reel shaft 12 in Fig. 1 is rotated at a predetermined speed. Drive in a clockwise direction. As a result, the magnetic tape 64 is attached to the tape cassette. The reel on the left side is connected from the reel hub (not shown) attached to the reel shaft 12 on the right side in FIG. The reel is wound at a predetermined speed onto a reel hub (not shown) attached to the reel shaft 12. In the meantime, the recording/reproducing head 16, which functions as a reproducing head, is attached to the magnetic recording surface of the magnetic tape 64. The information recorded magnetically is detected, and the detected information is transferred to the aforementioned tape disc (not shown). Connect the speaker installed on the main body of the coder or the earphones connected to the main body above. played through.

[0054] Slide operation button 54 from the rest position (stop mode setting position) shown in FIG. By moving it to the second position on the left (fast rewind mode setting position). The fast rewind mode and fast forward mode set on the tape recorder (not shown) described above By pressing the button 52 from the rest position shown in FIG. -The fast forward mode set on the precoder is according to one embodiment of this invention. Since this is unrelated to the operation of the recording timing control device, the explanation will be omitted.

[0055] In the above-mentioned tape recorder (not shown), the eject button 50 is operated in a sliding manner. When the button 54 is located at the rest position (stop mode setting position) shown in FIG. It is possible to press only the cassette lid, and when pressed, the cassette lid opens as described above. can be moved to the open position. and the cassette lid moves to the open position. The tape cassette in the Kangaru pocket on the cassette lid also has a tape cassette storage recess. It is discharged from the place.

[0056] In the embodiment described above, contact spring 46 rotates on elongated erase head support lever 38. It is arranged at the end opposite to the rotation center axis 40 and is sufficiently far away from the rotation center axis 40. Ru. Therefore, the erasing head support lever 38 can be moved between the rest position (non-operating position) and the contact position ( When rotating around the rotation center axis 40 between the main chassis 1 Switching between the contact state and the separation state of the contact spring 46 with respect to the stop column 24 on 0 The speed is fast. Therefore, recording timing can be controlled more precisely. Note that this invention is not limited to the embodiment described above.

[0057] For example, the stop column 24 is cut out from the main chassis 10 and stands up like the side wall 10a. It can also be configured by raising it. In this case, the independent It is necessary to prepare the assembled parts, assemble them into the main chassis 10, and manage inventory. It becomes unnecessary.

[0058] Further, the stop column 24 functions as a stopper for the recording/reproducing head support lever 14. It is not necessary, but the stopper of the recording/reproducing head support lever 14 is independent of the stop column 24. The stop pillar 24 is provided on the main chassis 10 and is provided only for contacting the contact spring 46. You can also do that. However, the stop column 24 is used as a stopper for the recording/reproducing head support lever 14. It is better to reduce the number of parts, simplify assembly, and manage parts inventory. It is clear that it is easy.

[0059] Further, contrary to the aspect of the embodiment described above, the stop column 24 is separated from the main chassis 10. It is electrically connected to the electrical circuit of the tape recorder, and the contact spring is connected to the electrical circuit of the tape recorder. 46 to the main chassis 10, the above-described implementation can also be achieved. A switch mechanism can be constructed that functions similarly to the example case.

[0060] Note that in the above-mentioned embodiment, a switch mechanism for controlling the recording timing is configured. The stop column 24 and electrical contact members such as the contact spring 46 are located on the main chassis 10 and on the main chassis 10. The erase head support lever 38 is rotatable relative to the erase head chassis 10. However, both electrical contact members can be placed on the main chassis 10 or The erasing head supporting lever 38 is placed only on either side of the erasing head supporting lever 38. 38 is placed in the contact position (operating position) to turn on the switch. You can also do it. The point is that the above switch mechanism responds to the erase head support lever. Any configuration that can be used is fine.

[0061] As detailed above, the recording timing of the tape recorder according to an embodiment of this invention is as follows. For recording control devices, there is a close connection with the recording mode setting, and The erasing head support lever, which is precisely positioned, allows for Since it controls the on/off of the agent switch, the switching timing is It is easy to set the timing to a desired state.

[0062]

[Effect of the idea]

In the tape recorder recording timing control device according to this invention, recording The operation of the switch mechanism that controls the timing is linked to the movement of the erase head lever. This allows you to obtain the desired recording start timing without having to make complicated adjustments during assembly. As a result, problems such as recording so-called transient noise are eliminated. be done.

[Brief explanation of drawings]

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

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

[Figure 3] The main parts of the tape recorder in Figure 1 are shown in standby mode.
FIG. 3 is a plan view schematically showing a state in which a mode is set.

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

[Explanation of symbols]

24...Stop pillar (switch mechanism), 38...Erasing head support lever, 44...Erasing head, 46...Contact spring (switch mechanism), 54...Sliding operation button, 64...Magnetic tape.

Claims (1)

[Scope of utility model registration request] 1. An erasing head using a permanent magnet is mounted, and the erasing head is movable between a first position in contact with the magnetic tape and a second position away from the magnetic tape. 1. A recording timing control device for a tape recorder, comprising: an erasing head lever; and a switch mechanism for controlling recording start timing when the erasing head lever is moved to a first position.