JPS5931786B2 - Recording operation device for cassette tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording operation device for a micro cassette tape recorder.

With the spread of magnetic recording and reproducing devices (hereinafter referred to as tape recorders) in recent years, people have begun to record the contents of talks at conferences, lectures, etc. directly on tape recorders and play them back instead of writing notes. However, due to this usage, it is desired that the tape recorder be constructed to be small and lightweight, easy to carry, easy to operate, reliable and inexpensive.

Further, in order to conveniently repeatedly reproduce a desired recording location on a tape, it is desirable to provide an operating mechanism such as a review mechanism that allows rewinding in the playback state and a cue mechanism that allows fast forwarding in the playback state. However, if all of these conditions are to be met, the cost of the product will be extremely high. Ultra-compact tape recorders require high precision in order to make the individual parts small, and the work involved in assembling them is extremely complicated, making it extremely difficult to reduce the price. In other words, in the past, ultra-small cassette tape recorders were configured based on the configuration of large-sized cassette tape recorders, so when parts became ultra-small, automatic assembly and adjustment were complicated, and most of these tasks were done manually. This resulted in major problems in terms of accuracy and cost. The present invention aims to eliminate such difficulties and contribute to the provision of a highly accurate and low-cost ultra-compact cassette tape recorder, and is particularly characterized by a novel recording operation device that enables review operations in recording mode. It is something.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIGS. 1a and 1b showing the external appearance of the front and side surfaces of a cassette tape recorder, 1 indicates a pocket into which a cassette is inserted. is doing. 3 is the play button, 4 is the record button, 5 is the stop button, 6 is the rewind button,
It is a fast forward lever, and is also equipped with an earphone jack, a microphone jack, a volume adjustment knob, etc. (none of which are shown).

Before going into the specific internal structure of the recorder, the operating method of the above-mentioned cassette tape recorder will be briefly explained to aid in understanding the following description.

That is, when the stop button 5 is first pushed in the direction of arrow A in FIG. 1, the pocket 1 moves upward to insert a cassette tape.
When the force setting tape is inserted into pocket 1 and the pocket 1 is pressed against the machine surface, the force setting tape is loaded into position. From the state in which this power set tape is assumed to have already been recorded, pressing the playback button 3 in the direction of arrow A enters the playback mode, and during playback, rewinding and pushing the fast forward lever 6 in the direction of arrow B will be described later. As shown, the pinch roller is removed from the capstan, and at the same time, the supply side reel drive shaft is reversed, and X rewinding is performed while in the playback mode. This is a so-called review operation. Also, when rewinding or pushing the fast forward lever 6 in the direction of arrow C, fast forwarding is performed while in the playback mode. In other words, it is a single operation. The tape running is stopped by moving the stop button 5 in the direction B, and in conjunction with this, the playback button 3 returns to its original position and enters the stop mode. Next, referring to the recording operation, the recording mode is obtained by pressing the record button 4 and the playback button 3 at the same time in the direction of arrow A.

At this time, the record button 4 is installed flush with the corner window 7 of the playback button 3, so if you press the record button 4 in vain, the playback button 3 will be pressed at the same time.
Since the button is also pressed, recording operations can be performed with just one finger. Furthermore, force set tapes are generally provided with fins to prevent accidental erasure of the recorded content, and the force set tape recorder side selects whether the force set tape can be erased or vice versa. I try to let them do it, but
The set tape recorder of the present invention is also provided with an erroneous erasure prevention mechanism to detect the presence or absence of fins and to prevent erroneous erasure. Furthermore, when rewinding in recording mode and pressing the fast forward lever 6 in the direction of arrow B, the playback button 3 remains in the X position.
Then, only the recording button 4 returns to its original position, and the above-mentioned review state is entered.When the rewind is performed and the fast forward lever 6 is returned to the center, the playback mode is entered. This means that the recorded content can be played back immediately. In addition, in recording mode, the rewind and fast forward levers 6
Since there is no need for the key operation to push the button in the direction of arrow C, the pushing operation in the direction of arrow C is prevented by a stopper, which will be described later. Furthermore, when running the tape in playback mode,
The eject operation to remove the power set tape is now disabled. Next, to explain the rewind and fast forward operations, to rewind in stop mode, press the rewind/fast forward lever 6 in the direction of arrow B, and to perform fast forward, move the rewind/fast forward lever 6 in the direction of arrow C. push.

The eject operation for taking out the force setting tape is performed by pushing the stop button 5 in the direction of arrow A from the stopped state and lifting the pocket 1 by the leaf spring.

As explained above, the operation buttons for playback, recording, stop, eject, fast-forward, rewind, review, and cue operations are all located on the same side of the power-set tape recorder, and these buttons can be used to perform these operations. It is designed so that it can be applied with just one hand.

Next, to explain the specific internal structure, in FIG. A capstan 13, which is integrally connected to a flywheel 12 (located on the lower surface of the substrate 8) in a concentric manner, is supported by a bearing 11 formed in the above.

Further, pins 14, 15, 16 are implanted on the upper surface of the substrate 8, and a first sliding plate 20 has guide holes 17, 18, 19 into which the pins 14, 15, 16 are inserted. Utilizing the fit between the pin and the guide hole, it is attached so as to be slidable in the directions of arrows A and D. This first sliding plate 20 is integrated with the playback button 3, and a magnetic head mounting plate 22 to which a recording/playback magnetic head 21 is integrally fixed is mounted on the plate 20 for position adjustment. Further, a pin 23 is installed on the upper surface of the first sliding plate 20, a lever 24 is horizontally rotatably mounted on the pin 23, and a pinch roller 25 is rotatably supported on the lever 24. A torsion spring 26 is wound around the lever 23 and has one end hooked to the lever 24 and the other end hooked to the first sliding plate 20.
The lever 24 is urged to rotate counterclockwise, but the amount of rotation is regulated by the position of the pinch roller shaft protruding into the slot of the substrate 8.
Furthermore, a notch 27 is formed in the first sliding plate 20, and a pedestal 28 embedded in the stop button 5 is engaged with the notch 27. In this case, the notch 27 and the pin 28 are related to each other so as to perform the following functions. That is, as will be clear from the explanation that will be given later, when the regeneration button 3 is pushed in and the first sliding plate 20 is slid in the direction of arrow A, the pin 28 moves against the first sliding plate 20.
When the first sliding plate 20 moves within the notch 27 by a certain amount, the coil spring biasing the stop button 5 counterclockwise causes the notch to close. A pin 28 is inserted into a locking engagement hole 27a provided in 27 and controls the locking of the playback button 3 and the first sliding plate 20. Further, this lock release is accomplished by pressing the stop button 5 in the direction B. Similarly, a pin 29 shown by the imaginary line in FIG. 4 is fixed to the lower surface of the first sliding plate 20, and an L-shaped lever 30, which will be described later, is engaged with the pin 29. A force setting guide pin 31 is provided on the board 8.
, 83 are erected, and by the action of the torsion spring 32 wound around one of the pins 31, the first sliding plate 20 is constantly moved in the direction of the arrow D.
It is pressed and biased in the direction. A second sliding plate 33 is mounted on the upper surface of the first sliding plate 20, and an erasing magnetic head 34 is fixed to the second sliding plate 33.

In addition, guide holes 35 and 36 are formed in the second sliding plate 33, and pins 16 are provided upright from the substrate 8 in these guide holes 35 and 36.
, 37 are plunged in, thereby causing the second sliding plate 33 to move into the first position.
Like the sliding plate 20, it is slidable in the direction of arrow A. Furthermore, hanging pieces 38 and 39 are formed on the second sliding plate 33,
One hanging piece 38 is attached to a rotating body 61 (described later), and the other hanging piece 3
9 are engaged with the tip engaging portions 41 of the fin detection lever 40, respectively. This fin detection lever 40 is connected to the second sliding plate 3
3, a fin detection window piece 42 is rotatably connected to the pin 37 and fixed to the lever 40.
is correspondingly positioned so that it hits the fin of the force set. Furthermore, a torsion spring 43 is wound around the pin 37.
By engaging one end of the fin detection lever 3 with the fin detection lever 40 and the other end with the substrate 8, a rotational force in the counterclockwise direction is constantly applied to the fin detection lever 40. On the other hand, as shown in FIGS. 3 and 5, a fast-forwarding lever 6 is pivotally attached to the capstan bearing 11 so as to be horizontally rotatable, and a notch is provided by cutting out a part of the lever 6. A rewinding gear body 45 is housed inside 44. This gear body 45 includes a pair of upper and lower gears 45a and 45b, and a shaft 45c that integrally connects these gears.
It is held by a bearing 46 installed in a notch 44, and is meshed with a sun gear 47 fixed to the flywheel 12 with the lower gear 45b protruding into the flywheel 12. The gear body 45 is screwed to the base plate 8.
The leaf spring 49 fixed by the lever 8 is biased so that it is always located within the notch 44, and therefore follows the rotation of the fast-forwarding lever 6 for rewinding, but the amount of rotation is axis 4
5c is inserted through the guide hole 50 of the substrate 8. A motor 51 is screwed to the substrate 8, and the rotational force of the motor 51 is transmitted to the flywheel 12 via a belt 52. The rewinding gear body 45 transmits the rotational force input to the flywheel 12 to other elements, and as the rewinding and fast forwarding levers 6 are rotated, the gear 5 fixed to the take-up reel drive shaft 10 is rotated.
3, or the gear 45 on the intermediate gear 54 pivotally supported on the board 8
Selectively engage a. Note that the intermediate gear 54 always meshes with a gear 55 fixed to the supply reel drive shaft 9. On the other hand, on the lower side of the first sliding plate 20, as shown in FIGS. 4 and 6, a shaft 57 is supported by a pair of bearings 56, 56, and a clutch fixing pawl 58 is fixed to the shaft 57. At the same time, the movable clutch pawl 60 corresponding to the clutch fixing pawl 58 is always urged toward the clutch fixing pawl 58 by the action of the coil spring 59. In this case, one part of the movable clutch pawl 60 is thrust into the guide hole 65 formed in the base plate 8, so that the movable clutch pawl 60 cannot rotate and is only allowed to move forward and backward on the shaft 57. . Because of this structure, when the fixed clutch pawl 58 and the movable clutch pawl 60 engage, the shaft 57 becomes unable to rotate and is locked. Further, a rotating body 61 is fixed to the shaft 57 on the opposite side of the clutch movable pawl 60 across the coil spring 59, and projecting pieces 62 and 63 are formed on both ends of the rotating body 61. Among these, the projecting piece 62 is engaged with the hanging piece 43 of the second sliding plate 33 mentioned above, and when the shaft 57 and the rotating body 61 rotate during the recording operation, the projecting piece 62 is engaged with the hanging piece 43 of the second sliding plate 33. It acts to press the moving plate 33 in the A direction. The protruding piece 63 is also the rotating body 61
As the fast-forwarding lever 6 rotates, it rewinds and enters the rotation locus of the fast-forward lever 6, preventing the lever 6 from rotating in the fast-forwarding direction, making fast-forwarding operation from the recording mode impossible.

In other words, the protruding piece 63 is a member of the stopper. The recording button 4 and the clutch fixing claw 58 are interconnected by a square shaft 67 protruding from the circumferential surface of the clutch fixing claw 58 that is permanently fitted into a square hole 66 of the recording button 4. Press record button 4 to A
When pushing in the direction, the clutch fixing pawl 58 and shaft 57
is rotated as a whole. The movable clutch pawl 60 meshes with the fixed clutch pawl 58 as it rotates, and maintains a separated position in the non-regeneration state. Describing the mechanism for this clutch operation, a first sliding plate 20 is attached to the guide pin 14.
An L-shaped lever 30 is rotatably mounted on the lower side of the lever 30, and one end of the lever 30 is unwound, and the protrusion 69 of the fast-forward lever 6
The other end is positioned so as to be engageable with the pin 29 fixed to the first sliding plate 20, and the open free end of the other end is positioned so as to be engageable with the pin 29 fixed to the first sliding plate 20. It is fitted and locked in the groove 70. On the other hand, in order to load the force setting tape, L-shaped angle members 71 and 72 are fixed to the rear end side of the board 8, and the pocket 1 is pivotally attached between these angle members 71 and 72 via pins 73 and 74. . The stop button 5 and the eject lever 75 (force set ejection lever) are connected by a pin 76 so as to be relatively horizontally rotatable, and the pin 76 is inserted and held in a guide hole 77 on the board 8 side, thereby allowing the above-mentioned Allows for relative rotation. Note that the eject lever 75 is formed with a hanging piece 78 having a tapered surface, and a pin (not shown) is provided in the pocket 1 in opposition to this tapered surface.
The L-shaped guide hole 79 opened in the stop button 5 has a board 8
An upright pin 80 protrudes into the stop button 5, so that the stop button 5 is driven by the eject lever 75 to slide in the A direction, and can also be moved in a direction perpendicular to the A direction. The stop button 5 is always pulled diagonally downward toward the drawing in FIG. 2 by the action of a coil spring 81. Next, the operation in the above configuration will be explained.

The force setting tape 82 inserted into the pocket 1 is loaded into a predetermined position by the force setting guide pins 31, 83 and the leaf spring 84 as the pocket 1 is pressed against the board 8. First, to explain playback, playback button 3
By pushing in the A direction, the first sliding plate 20 slides.

Accordingly, the stop button 5 side pin 28 existing in the notch 27 moves relative to the notch 27, and by the action of the coil spring 81 that constantly pushes the stop button 5 in the counterclockwise direction, the lock engagement hole 27a is moved. The pin 28 enters and locks the playback button 3 and the first sliding plate 20. Further, as the first sliding plate 20 slides, the recording/reproducing magnetic head 21 fixed thereto enters into the force setting tape 82 through the opening formed on the force setting side surface and comes into contact with the tape. Further, the pinch roller 25 is driven by the first sliding plate 20, and is elastically pressed against the capstan 13 by a torsion spring 26 at a constant normal pressure, thereby enabling the tape to run at a constant speed. To make the review work,
Rewind while in the playback mode, push the fast forward lever 6 in direction B, and move the rewind gear body 45 in the notch 44 of the lever 6 out of the gear 53 on the drive shaft 10 side of the tape take-up reel 1 and into the intermediate gear 54. The rotational force of the flywheel 12 is transferred from the sun gear 47 to the gear body 45 to the intermediate gear 54 to the gear 5.
5 to the tape supply reel drive shaft 9, and the shaft 9 is rotated in the reverse direction to rewind the tape. At this time, since the rotating direction of the capstan 13 and the running direction of the tape are reversed, the pinch roller 25 is
3, but this is because when the rewinding and fast forwarding lever 6 is pushed in the direction B, the protrusion 69 of the lever 6 presses the pin 85 fixed to the lever 24, and the pinch roller 25 is moved away from the pin 23. This is done by rotating the capstan 13 about a fulcrum and separating it from the capstan 13. Next, to explain the rewinding operation, press the rewind and fast forward lever 6 in the C direction while in the playback mode.

Accordingly, the unwinding gear body 45 is replaced by the take-up reel stand side gear 5.
3, only the lever 6 rotates, a switch (not shown) is turned on, a large current is supplied to the motor 51 in terms of circuitry, the motor 51 rotates at high speed, and the tape is fed in the forward direction at high speed. At this time, the pinch roller 25 remains in pressure contact with the capstan 13. Next, to explain the normal rewind and fast forward operations, press X with the play button 3 and record button 4 stopped, press the rewind/fast forward lever 6 in the direction of B or C, and select rewind or fast forward. .

That is, when the lever 6 is pushed in the direction B, the rewinding gear body 45, which has been meshed with the take-up reel stand side gear 53, is driven and meshed with the intermediate gear 54, and at the same time, a switch (not shown) is turned on, and the motor 51 is turned on. The rotational force causes the tape supply reel drive shaft 9 to rotate counterclockwise, thereby rewinding the tape. Conversely, when the lever 6 is pushed in the C direction, the rewinding gear body 45 remains engaged with the take-up reel stand side gear 55, and the lever 6 is pushed.
As the motor 51 rotates, the aforementioned switch is turned on, and a large current is supplied to the motor 51, so that the tape is fed in the forward direction at high speed. Next, the recording operation will be explained.

When the force setting tape 82 is a tape that can be recorded, that is, the cassette has fins, the fin detection lever 40 is pushed by the fins of the force setting and rotates clockwise about the pin 37, 2. The hanging piece 39 of the sliding plate 33 disengages from the notch 41 of the fin detection lever 40,
The second sliding plate 33 becomes slidable. At this time, when the playback button 3 and the record button 4 are pushed in the A direction, the playback button 3 is locked in the same way as in the playback operation described above, but the record button 4 slides in the A direction, and as shown in FIG. 4, the playback button 3 is locked. Due to the engagement between the hole 66 and the square shaft 67 of the clutch fixing pawl 58, the shaft 57 is rotated. Accordingly, the clutch movable pawl 60 slides on the shaft 57 by the coil spring 59 and engages with the clutch fixed pawl 58. Since the clutch movable pawl 60 is guided by the guide hole 65 of the board 8,
The clutch fixing pawl 58 is locked, ie, cannot be rotated, by engagement. On the other hand, since the protruding piece 62 also follows the rotation of the shaft 57, the second sliding plate 33 is slid in the A direction by the protruding piece 62. In response to this, the erasing magnetic head 34 on the second sliding plate 33
enters the force set through a window on the side of the cassette and comes into contact with the tape. In the case of the force setting tape 82 whose fins have been removed to prevent erroneous erasure, the protruding piece 42 of the fin detection lever 40 enters the inside through the opening of the force setting as the force setting tape 82 is loaded. Fin detection lever 4
The notch 41 at No. 0 remains engaged with the second sliding plate 33, so the second sliding plate 33 is not unlocked and the pressing operation of the recording button 4 in the A direction is prevented. It is.

When rewinding in recording mode and pressing the fast forward lever 6 in the direction B, the projection 69 on the lever 6 moves the L-shaped lever 3
0 and press one end of the lever 30 with the pin 14 as the center.
, move the clutch movable pawl 60 backward against the coil spring 59 with the other end of the lever 30, and then move the clutch fixed pawl 5
8, and accordingly, the recording button 4 is returned to its original position by the torsion spring 86.

Further, in the recording mode, the rewind/fast forward lever 6 is prevented from rotating in the C direction by the protruding piece 63 of the rotary piece 61. Furthermore, to cancel the recording mode, the playback button 3 is returned to its original position by pushing the stop button 5 in the direction A, in the same way as when stopping playback. That is, the pin 29 implanted on the back surface of the first sliding plate 20 jumps the stepped portion 30a of the lever 30, rotates the lever 30 clockwise, moves the movable clutch pawl 60 backward, and moves the clutch fixed pawl 58. and return the recording button 4 to its original position. Next, the ejection operation will be explained.

When the stop button 5 is pushed in the A direction in the stop mode, the eject lever 75, which is pivotally connected by a pin 76, is driven and moved in the A direction.
Performs directional sliding. At this time, a pin (not shown) fixed to the side surface of the pocket 1 is pushed up by the tapered surface of the hanging piece 78 formed on the eject lever 75, and the pocket 1 is moved upward to a predetermined position by the leaf spring 87. . Therefore, the force setting tape 82 can be easily removed by hand. As described in detail above, according to the present invention, the rotary shaft rotates in conjunction with the operation of the recording button, and after the rotation, the rotary shaft and the recording button are locked by the engaging clutch means, and in this locked state, the stopper is locked. Since one member is made to rewind and enter into the rotation locus of the fast-forward lever to prevent the lever from rotating in the fast-forward direction, there is no possibility of erroneous operation to the fast-forward mode, and there is no possibility of erroneous operation in the rewind direction. To. It is convenient because rotation, that is, review operation is possible, and in conjunction with this review operation, the release lever releases the lock of the rotation shaft and the recording button, prompting the return to the original position, so that the playback mode can be changed from the above-mentioned playback mode. This is useful in situations where the recorded content can be rewinded without any trouble and the recorded content is immediately played back.

Moreover, since these components are arranged around the rotation axis, they can be assembled in a unitary state, so that assembly and adjustment are easy and reliable operation can be expected. Therefore, the present invention is very useful for use in ultra-compact power set tape recorders.

[BRIEF DESCRIPTION OF THE DRAWINGS] Figs. 1A and 1b are a plan view a and a side view b of a cassette tray recorder having an embodiment of the recording operation device of the present invention, Fig. 2 is an enlarged internal configuration diagram, and Fig. 3 4 is an enlarged internal configuration diagram of the recording mechanism, FIG. 5 is an exploded perspective view of the rewinding mechanism, and FIG. 6 is an exploded perspective view of the recording mechanism. 1 is the pocket, 3 is the play button, 4 is the record button, 5 is the stop button,
6 is a rewind and fast forward lever; 8 is a circuit board; 20 is a first sliding plate; 21 is a recording/playback head; 27 is a lock engagement hole 27
a notch, 28 is a pin, 30 is an L-shaped lever, 3
3 is a second sliding plate having vertical pieces 38 and 39; 34 is an erasing magnetic head; 40 is a fin detection lever having an engaging portion 41 and a fin detection protrusion 42; 57 is a shaft; and 58 is a square shaft 67. 59 is a coil spring; 60 is a clutch movable piece; 61 is a rotating piece having projecting pieces 62 and 63; 6;
6 is a square hole of the recording button 4, and 70 is a concave groove of the movable clutch pawl 60.

Claims (1)

[Claims] 1 A rotating shaft that rotates in conjunction with a recording button, a dog clutch means that locks the rotating shaft after rotation of the rotating shaft due to a recording operation, and a member that protrudes from the circumferential surface of the rotating shaft, and the above-mentioned a stopper member that rewinds after rotation and enters into the rotation locus of the fast-forward lever to allow rotation of the lever only in the rewinding direction; and a release lever having one end locked to the dog clutch means; A recording operation device for a cassette tape recorder, comprising a lever that unlocks the rotary shaft in conjunction with the rotational movement of the rewind and fast forward levers in the rewind direction.