JP2635060B2 - Magnetic recording / reproducing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a magnetic recording / reproducing apparatus.

2. Description of the Related Art A magnetic recording / reproducing apparatus includes an operation member for switching the mode of the magnetic recording / reproducing apparatus and a slide switch for switching the mode of the amplifier to recording or reproduction, and the slide switch operates the amplifier in accordance with the operation of the operation member. Switch the mode between recording and playback. That is, when the operation member is placed at the recording mode setting position, the slide switch records the amplifier mode by the operation member, and when the operation member is placed at the reproduction mode setting position, the slide switch reproduces the amplifier mode by the operation member. When the operation member is located at the stop mode setting position, the slide switch sets the mode of the amplifier to either recording or reproduction by the operation member.

(Problems to be Solved by the Invention) When performing magnetic recording in a magnetic recording / reproducing apparatus,
In order to avoid useless magnetic recording, the mode of the magnetic recording / reproducing apparatus is frequently switched between recording and stop. In the conventional apparatus having the above-described configuration, when the operation member is placed at the stop mode setting position, the mode setting of the amplifier by the slide switch is reproduced, and the operation member causes the mode of the magnetic recording / reproducing apparatus to be reproduced and stopped. A slide switch associated with the operating member each time it is frequently switched between and also switches the mode of the amplifier between recording and playback. The generation of noise due to switching between the recording and reproduction of the amplifier mode by the slide switch causes the noise to be recorded on the recording medium at the time of recording, and becomes annoying at the time of reproduction.

Further, the conventional magnetic recording / reproducing apparatus is used for so-called dictating purpose, in which audio recording information recorded by the magnetic recording / reproducing apparatus is converted into character recording information by a word processor or the like while listening while being divided into appropriate lengths during reproduction. Sometimes. Also in this case, when the operation mode of the amplifier by the slide switch is set to the recording mode when the operation member is disposed at the stop mode setting position, the operation member switches the mode of the magnetic recording / reproducing apparatus between the reproduction and the stop. Each time the switch is switched, a slide switch associated with the operating member also switches the mode of the amplifier between reproduction and recording. Switching between amplifier playback and recording with the slide switch reduces the life of the slide switch.

The present invention has been made in view of the above circumstances, and an object of the present invention is to enable the mode of the amplifier to be changed even if the mode of the magnetic recording / reproducing apparatus is frequently switched between recording and stopping and between reproducing and stopping by an operating member. An object of the present invention is to provide a magnetic recording / reproducing apparatus which does not generate noise in a slide switch for switching and can make the slide switch last longer.

(Means for Solving the Problems) An object of the present invention as described above is to provide an operation member for switching the mode of the magnetic recording / reproducing apparatus, a slide switch for switching the mode of the amplifier to recording or reproduction, and an operation member for switching from the recording mode to the recording mode. Holding means for holding the position of the slide switch at the recording position when the mode is switched to the stop mode, and holding the position of the slide switch at the play position when the operating member is switched from the play mode to the stop mode. This is achieved by a magnetic recording and reproducing apparatus.

(Operation) In the magnetic recording / reproducing apparatus according to the present invention having the above-described configuration, even if the operation member for switching the mode of the magnetic recording / reproducing apparatus is switched from the recording mode to the reproducing mode, the mode of the amplifier is not changed. The position of the slide switch for switching the recording to the recording or reproduction is held at the recording position. Further, even if the operation member for switching the mode of the magnetic recording / reproducing apparatus is switched from the reproduction mode to the stop mode, the position of the slide switch for switching the mode of the amplifier to the recording or reproduction is maintained at the reproduction position.

(Example) Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a tape recorder chassis 10 as one type of a magnetic recording / reproducing apparatus according to an embodiment of the present invention from the front side. Here, various operation members and switches of the tape recorder are mounted on the chassis. The chassis 10 is indicated by a two-dot chain line because it is located on the back side of the chassis 10.
The tape recorder is a handy type tape recorder using a tape cassette called a so-called microcassette. Micro cassette is chassis 10
It is placed at a predetermined position on the surface of the chassis 10 by a positioning pin (not shown) mounted on the front surface side and implanted on the front surface side. The chassis on the front side of the chassis 10
A take-up reel shaft and a take-up reel shaft inserted into a pair of reel hubs of a microcassette (not shown) disposed at predetermined positions on the surface of the micro-cassette 10 are arranged, and a take-up reel shaft and a rewind reel shaft are provided. Center of rotation of each 12,14
The base is inserted into openings 16 and 18 formed in the chassis 10 and fixed to tongue pieces 20 and 22 that are bent from the periphery of the openings 16 and 18 to the back side.

Rotation center shafts 12 and 14 located on the back side of chassis 10
A take-up reel gear 24 and a rewind reel gear 26, which are concentrically connected to a take-up reel shaft and a rewind reel shaft, respectively, via a known slip mechanism, are rotatably mounted on the base portion of the motor.

On the back side of the chassis 10, a slide operation lever 28 extending further along the lower edge of the chassis 10 is arranged, and the slide operation lever 28 is an operation button protruding outward from the lower edge of the chassis 10. Has 29. The slide-type operation lever 28 is guided by a plurality of guide pins 30 that are implanted on the rear surface of the chassis 10 or bent to protrude to the rear surface side so as to move along the lower edge of the chassis 10. Three positioning recesses 32, 34, 36 are continuously formed on the lower edge of the sliding operation lever 28, and one of these positioning recesses 32, 34, 36 is formed on the side wall of the chassis 10. A roller 40 rotatably attached to the other end of the leaf spring 38 having one end fixed thereto is engaged. The three positioning recesses 32,3 on the lower edge of the sliding operation lever 28
And a roller 40 rotatably supported by a leaf spring 38 fixed to the side wall of the chassis 10 and engaged with one of the three positioning recesses 32, 34, 36, a sliding operation lever. A so-called click stop mechanism for selectively holding 28 in three predetermined positions is provided.

A capstan 44 rotatably held by a bearing 42 on the chassis 10 is disposed near the upper edge of the slide operation lever 28 at a substantially intermediate position between the take-up reel gear 24 and the take-up reel gear 26. A flywheel 46 is concentrically fixed to the base of the capstan 44 located on the back side of the chassis 10, and a drive gear is mounted on the upper surface of the flywheel 46 facing the back side of the chassis 10. 48 are concentrically fixed.

On the peripheral surface of the flywheel 46, a pulley 52 on the output shaft of a motor 50 fixed to the chassis 10 on the side of the chassis 10.
And a power transmission belt 54 is stretched between them. motor
50 rotates at a predetermined speed only in one direction indicated by arrow A.

The outer peripheral surface of the bearing 42 on the chassis 10 has a rotating lever 56 between the rear surface of the chassis 10 and the drive gear 48 of the flywheel 46.
Is mounted so as to be rotatable along the rear surface of the chassis 10, and a large-diameter first rocking gear 58 meshed with the driving gear 48 is rotated at the other end of the rotating lever 56. Mounted freely. The first swing gear 58 is a rotating lever 56
A small-diameter second oscillating gear 60 integrally formed concentrically on its outer surface facing the second oscillating gear, and the second oscillating gear 60 meshes with the take-up reel gear 24. ing.

The rotating lever 56 is provided with a contact pin 62 at one end on the slide operation lever 28 side, and the contact pin 62 contacts the upper edge of the slide operation lever 28 so that the rotation lever 56 Rotation in the same direction as the rotation direction of the output shaft (clockwise direction in FIG. 1) is prevented.

The other end of the rotating lever 56 is further rotatably mounted on the rear surface of the chassis 10 on the side of the rewind reel gear 26 side with respect to the rotation center shaft 64 implanted on the rear surface of the chassis 10. A rewind idler gear 66 is disposed. The rewind idler gear 66 meshes with the rewind reel gear 26, and is located in the same plane as the large-diameter first swing gear 58 rotatably supported at the other end of the rotary lever 56. positioned.

The take-up reel gear 24 has a small-diameter rapid feed gear 68 formed concentrically and integrally on the back surface thereof. A large-diameter first fast-forward idler gear 66 rotatably mounted on a rotation center shaft 70 implanted on the back surface of the chassis 10 meshes with the fast-forward gear 68, and the first fast-forward idler The gear 66 meshes with a small-diameter second fast-forward idler gear 76 rotatably mounted on a rotation center shaft 74 implanted on the rear surface of the chassis 10. The second fast-forward idler gear 76 is also located in the same plane as the large-diameter first oscillating gear 58 rotatably supported at the other end of the rotating lever 56. But capstan 44
Is located within the extension of the movement trajectory drawn by the large-diameter first oscillating gear 58 when turned around in the counterclockwise direction.

A notch 78 is formed at the upper edge of the slide operation lever 28 so as to extend further rightward from a position separated by a predetermined distance to the right of the contact pin 62 at one end of the rotation lever 56.

A first switch lever 80 extending vertically along the left edge of the chassis 10 is disposed on the rear surface of the chassis 10. The lower end of the first switch lever 80 is attached to a protruding end of a fixing pin 82 planted at the left corner of the rear surface of the chassis 10 so as to be rotatable in parallel to the rear surface of the chassis 10. One end of a tension coil spring 84 is locked to the upper end of one switch lever 80. The other end of the tension coil spring 84 is hooked on a fixing pin 85 planted on the back surface of the chassis 10, and the tension coil spring 84
84 urges the first switch lever 80 to rotate clockwise around the fixing pin 82.

To the left of the upper end of the first switch lever 80, a start switch 86 for a motor 50 and a magnetic head (not shown) arranged on the front surface of the chassis 10 is fixed to the rear surface of the chassis 10.

An arm 88 extending rightward is formed at the lower end of the first switch lever 80, and a chassis 10 is provided at the end of the arm 88.
A guide pin 90 protruding toward the rear surface side is implanted. This guide pin 90 is formed by an inverted leg-shaped notch formed on the upper edge of the left extension of the slide operation lever 28.
Seated during 92.

A second switch lever 94 extending vertically along the right edge is disposed on the back surface of the chassis 10. Second
The central portion of the switch lever 94 is mounted so as to be rotatable in parallel to the rear surface of the chassis 10 by a fixing pin 96 planted on the rear surface of the chassis 10 and wound around the fixing pin 96. Both ends of the torsion coil spring 98 are engaged with engaging projections 100 formed on the upper and lower ends of the second switch lever 94. The lower end of the torsion coil spring 98 protrudes into a substantially quadrangular switch switching control cutout 102 formed at the right end of the upper edge of the slide operation lever 28.

A small first engagement protrusion 104 protruding downward so as to be adjacent to the left side of the lower end of the torsion coil spring 98 is provided at a lower edge of the second switch lever 94, and an upper portion of the right edge of the slide operation lever 28 is adjacent to the upper edge. And a large second engagement projection 106 protruding downward.

To the left of the upper end of the second switch lever 94, a slide switch 108 for switching the mode of an amplifier (not shown) for a magnetic head (not shown) to record or playback is provided on the chassis 1
It is attached to the back of 0. The operation unit 110 of the slide switch 108 is connected to the upper end of the second switch lever 94.

In the tape recorder constructed as described above, when the slide operation lever 28 engages the roller 40 of the click stop mechanism in the positioning recess 34 in the middle of the click stop mechanism as shown in FIG. A stop mode is set at this time, and at this time, a magnetic recording tape (not shown) in a tape cassette (not shown) held at a predetermined position on the upper surface of the chassis 10 by a cassette holder (not shown) arranged at a closed position. Thus, a magnetic head (not shown) on the upper surface of the chassis 10 is in light contact with the erasing head (not shown), and a pinch roller (not shown) is slightly separated from the capstan 44. In this case, as shown in FIG.
Since the upper end of 0 is separated and the start switch 86 is turned off, the magnetic head and the motor 50 (not shown) are not operating. However, in FIG. 1, the operation unit 110 of the slide switch 108 is disposed at a protruding position protruding rightward, and the operation unit 110 disposed at the protruding position is used as an amplifier for a magnetic head (not shown). Playback mode is set.

In the tape recorder shown in FIG. 1, the slide operation lever 28 is moved from the stop (stop) mode setting position shown in FIG. When the mechanism roller 40 moves until it engages in the rightmost positioning recess 36, the playback mode is set to tape recorder. Here, the aforementioned magnetic head (not shown) is in contact with a magnetic recording tape (not shown), the erasing head (not shown) is kept away from the magnetic recording tape (not shown), and a pinch roller (not shown) cooperates with the capstan 44. A magnetic recording tape (not shown) is sandwiched.

As shown in FIG. 2, the lever engaging portion 112, which is isolated by the switch switching control notch 102 at the right end of the upper edge of the slide operation lever 28 disposed at the play mode setting position, has a switch switching control notch 102 side. Is in contact with the lower end of the torsion coil spring 98 of the second switch lever 94. FIG. 2 shows the second engagement projection 106 of the second switch lever 94 which is arranged at the reproduction mode setting position when the slide operation lever 28 is arranged at the stop mode setting position shown in FIG. Are indicated by two-dot chain lines. As can be seen, while the sliding operation lever 28 moves between the stop mode setting position shown in FIG. 1 and the play mode setting position shown in FIG. The joining portion 112 only reciprocates between the second engagement protrusion 106 of the second switch lever 94 disposed at the reproduction mode setting position and the lower end of the coil spring 98, and the second switch lever 94 The second switch lever 94 is not driven by the lever engaging portion 112 of the slide operation lever 28, and thus remains at the reproduction mode setting position.

The slide operation lever 28 is moved to the play mode setting position by moving the guide pin 90 of the arm 88 of the first switch lever 80 from the cutout 92 of the left extension of the slide operation lever 28.
As a result, the rotation of the first switch lever 80 in the counterclockwise direction against the biasing force of the tension coil spring 84, as shown in FIG.
Turn on 86. The drive gear 48 of the flywheel 46 that has received a clockwise rotational force from the output shaft of the motor 50 has a state in which the rotating lever 56 has brought the contact pin 62 into contact with the upper edge of the slide operation lever 28. 2 and is prevented from rotating in the same direction as the rotation direction of the drive gear 48 due to the rotation of the drive gear 48, the rotation of the drive gear 48 through the first swing gear 58 having a large diameter. To transmit the rotating power to the take-up reel gear 24. As a result, a magnetic head (not shown) drawn out at a constant speed by a capstan 44 and a pinch roller (not shown) from a reel hub on the rewind reel shaft connected to the rewind reel gear 26 to which the rotational force from the motor 50 is not transmitted. A magnetic head (not shown) started by a start switch 86 in which an amplifier (not shown) is set to a reproduction mode by a slide switch 108 performs magnetic recording on the recording tape. A magnetic recording tape (not shown) passing between the capstan 44 and a pinch roller (not shown)
It is wound on a reel hub on a take-up reel shaft connected to a take-up reel gear 26 to which a rotational force from 50 is transmitted.

The sliding operation lever 28 is further shifted leftward from the play mode setting position shown in FIG. 2 by the arrow C, and the roller 40 of the click stop mechanism is located on the right side of the positioning recess 36 at the right end. When the tape recorder is moved until it rides on the inclined surface of the lower edge, the review mode is set in the tape recorder. In the review mode, the lever engaging portion 112 at the right end of the upper edge of the slide operation lever 28 is connected to the torsion coil spring 98 of the second switch lever 94.
Press the lower edge to the left. Here, the second switch lever 94 is shown in FIG. 1 and FIG. 2 in which the rotation amount regulating projection 114 protruding leftward from the left edge of the lower end portion abuts on the guide pin 30 on the back surface of the chassis 10. Since further rotation from the play mode setting position in the clockwise direction is prevented,
Only the lower edge of the torsion coil spring 98 of the second switch lever 94 pressed to the left by the lever engagement portion 112 of the slide operation lever 28 is left from the engagement projection 100 on the lower edge of the second switch lever 94. Move away from you.

Also in the review mode, the erasing head (not shown) and the pinch roller (not shown) are separated from the magnetic recording tape (not shown) and the capstan 44, and the magnetic head (not shown) remains in contact with the magnetic recording tape (not shown). At this time, the notch 78 at the upper edge of the slide operation lever 28 faces the contact pin 62 of the rotating lever 56. Accordingly, in the same manner as in the above-described play mode, the driving gear 48 that rotates in the same direction as the output shaft of the motor 50 by receiving the rotational force from the output shaft of the motor 50 for which the start switch 86 is turned ON is rotated. To rotate in the same direction as its own rotation direction, that is, clockwise direction.
The contact pin 62 enters the notch 78 at the upper edge of the slide operation lever 28, so that the rotation lever 56 rotates clockwise from the position shown in FIG. Then, the small-diameter second oscillating gear 60 is separated from the take-up reel gear 24, and the large-diameter first oscillating gear 58 is brought into contact with the rewind idler gear 66. This allows the magnetic recording tape (not shown) to rotate from the output shaft of the motor 50 from above the reel hub on the take-up reel shaft connected to the take-up reel gear 24 to which the rotational force from the output shaft of the motor 50 is not transmitted. It is wound onto a reel hub on a rewind reel shaft connected to a rewind reel gear 26 to which force is transmitted. During this time, the magnetic head (not shown) reproduces magnetic recording from the running magnetic recording tape (not shown) as described above.

The slide operation lever 28 is moved from the stop mode setting position shown in FIG. 1 to the right as shown by the arrow D in FIG. 1, and as shown in FIG. When the tape recorder is moved until it is engaged, the recording mode is set in the tape recorder.

While the sliding operation lever 28 is moved from the stop mode setting position shown in FIG. 1 to the record mode setting position shown in FIG. 3, the left edge of the switch switching control notch 102 on the upper edge of the sliding operation lever 28 The first engagement protrusion 104 of the second switch lever 94 is pressed to the right, whereby the second switch lever 94 rotates around the fixing pin 96 on the rear surface of the chassis 10 as shown in FIG. It is rotated counterclockwise from the mode setting position. The counterclockwise rotation of the second switch lever 94 from the reproduction mode setting position shown in FIG.
10 is caused to move to the left, whereby the slide switch 108 sets a recording mode for an amplifier (not shown) for the magnetic head (not shown), and the magnetic head (not shown) can function as a magnetic recording head.

Also in the record mode, as shown in FIG. 3, the rotating lever 56 keeps the contact pin 62 in contact with the upper edge of the sliding operation lever 28. The record mode differs from the play mode described above in that an erasing head (not shown) abuts on a magnetic recording tape (not shown), and a magnetic head (not shown) functions as a magnetic recording head.

When the sliding operation lever 28 is moved from the record mode setting position shown in FIG. 3 to the left as shown by the arrow E in FIG. 3 to the stop mode setting position shown in FIG. As shown by a two-dot chain line in FIG.
The second switch lever 94, which is arranged at the recording mode setting position as shown in FIG. 3, only slightly touches the lower end of the torsion coil spring 98 and does not press it. Therefore,
Once the slide operation lever 28 is set to the record mode setting position as shown in FIG. 3 and the mode of the slide switch 108 linked to the second switch lever 94 is set to the recording mode, The movement of the slide operation lever 28 between the record mode setting position shown in FIG. 3 and the stop mode setting position shown in FIG. 1 is performed by moving the second switch lever 94 from the record mode setting position shown in FIG. The movement to the play mode setting position shown in the drawing does not occur, and as a result, the mode of the slide switch 108 is maintained in the recording mode.

In the above-described tape recorder, a fast forward (fast forward) lever (not shown) is connected to the rotating lever 56. The fast forward lever (not shown) can be operated only when the slide operation lever 28 is located at the stop mode setting position shown in FIG. 1, and when not operated, the rotating lever 56 is further moved from the position shown in FIG. The clockwise rotation prevents the small-diameter second rocking gear 60 from disengaging from the take-up reel gear 24. When a fast forward lever (not shown) is operated, the rotating lever 56 is forcibly rotated further counterclockwise from the position shown in FIG. 1 by a fast forward lever (not shown).
Swing gear 60 is spaced apart from the take-up reel gear 24, and instead a large-diameter first swing gear 58 is replaced with a second fast-forward idler gear.
Engage with 76. Even when a fast forward lever (not shown) is operated, the first switch lever 80 rotates counterclockwise against the urging force of the tension coil spring 84 to turn on the start switch 86, so that the output of the motor 50 The shaft rotates clockwise as shown by arrow A in FIG. 1, and the rotational force from the output shaft of the motor 50 is applied to the drive gear 48 of the flywheel 46,
The first swing gear 58, the second rapid feed idler gear 76, the first
Is transmitted to the take-up reel gear 24 via the fast-forward idler gear 72 and the fast-forward gear 68.

In the fast forward mode, a magnetic head and an erasing head (not shown) arranged on the upper surface of the chassis 10 from a magnetic recording tape in a tape cassette (not shown) arranged at a predetermined position on the upper surface of the chassis 10,
And all of the pinch rollers are spaced apart. Accordingly, the magnetic recording tape is pulled out from the reel hub on the take-up reel shaft (not shown) connected to the rewind reel gear 26 to which the rotational force from the output shaft of the motor 50 is not transmitted, and It is taken up on a reel hub on a take-up reel shaft (not shown) connected to a take-up reel gear 24 to which rotational force is transmitted.

When the operation of the unillustrated fast forward lever is released, the rotating lever 56 is forcibly returned to the position shown in FIG. 1 by the unillustrated fast forward lever. The fast forward lever (not shown) does not interfere with the rotation of the rotation lever 56 in the clockwise direction from the position shown in FIG. 1, that is, the rotation to the position when the above-described review mode is set.

(Effects) As described in detail above, the magnetic recording / reproducing apparatus according to the present invention has an operation member for switching the mode of the magnetic recording / reproducing apparatus, a slide switch for switching the mode of the amplifier to the recording or reproduction, and an operation member for the recording mode. Holding means for holding the position of the slide switch at the recording position when the operation mode is switched to the stop mode, and holding the position of the slide switch at the reproduction position when the operation member is switched from the reproduction mode to the stop mode. Even if the mode of the magnetic recording / reproducing apparatus is frequently switched between recording and stop and between reproduction and stop by the operating member, noise is generated in the slide switch for switching the mode of the amplifier. Without
In addition, the life of the slide switch is prolonged.

[Brief description of the drawings]

Fig. 1 is a schematic plan view of a main part of the tape recorder when a stop mode is set in the tape recorder according to the embodiment of the present invention, viewed from the front side of a chassis; FIG. 3 is a plan view showing a main part of the tape recorder when the playback (play) mode is set in the tape recorder shown in FIG. The figure is recorded (record) on the tape recorder shown in Fig. 1.
FIG. 2 is a plan view simplified from FIG. 1 when a main part of the tape recorder is viewed from the front side of a chassis when a mode is set. 10: chassis, 24: take-up reel gear, 26: rewind reel gear, 28: slide operation member, 44: capstan, 46: flywheel, 50: motor, 54 ...
... power transmission belt, 94 ... second switch lever, 98 ...
... torsion coil spring, 102 ... switch switching control notch, 104 ... first engagement protrusion, 108 ... slide switch.

Claims (1)

(57) [Claims] An operation member for switching the mode of the magnetic recording / reproducing apparatus, a slide switch for switching the mode of the amplifier between recording and reproduction, and a position of the slide switch when the operation member is switched from the recording mode to the stop mode. And a holding means for holding the position of the slide switch at the playback position when the operation member is switched from the playback mode to the stop mode.