JPS6040102B2 - Pause mechanism in cassette tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pause mechanism in a cassette tape recorder, and more particularly, to a pause mechanism in a cassette tape recorder, and particularly to a pause mechanism for a pause mechanism for a tape cassette housed in a cassette holder. This invention relates to a device that moves a substrate to a pose mode position.

Traditionally, cassette tape recorders have been equipped with a pause mode mechanism, which moves the pinch roller away from the capstan during recording or playback to temporarily stop the running of the magnetic tape, allowing editing, cueing, or intermittent running of the recording. It is now possible to select the playback sound, etc.

In addition, in order to be able to quickly and arbitrarily locate the beginning of the magnetic tape during editing, the pinch roller is separated from the capstan and the magnetic head is slightly separated from the magnetic tape in the same way as in the pause state, and the cue or review mode is set. There are some things that can be formed. These pause mode, cue mode, and review mode are usually created by pressing one or more operation buttons dedicated to each of these modes provided on the tape recorder.
However, when editing a magnetic tape as described above, it is necessary to operate one or more different and troublesome modes. The task of selecting from among them is complicated and easy to make mistakes. The present invention has been made in view of the various problems of the prior art, and an object of the present invention is to guide the tape cassette housed in the cassette holder to the playing position in conjunction with the movement of the magnetic head. and pinch rollers to positions close to the magnetic tape and capstan, respectively, to immediately form a pause mode, and then operate the fast forward or fast rewind mode operation button to perform the above editing according to the cue mode, etc. To provide a pause mechanism in a new cassette tape recorder that allows immediate operation.

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a perspective view of a mechanical part of a cassette tape recorder equipped with a pause mechanism according to the present invention, with the outer shell removed;
2 is a front view, and FIG. 3 is a sectional view taken along the line A--A in FIG. 2.

Reference numeral 1 denotes a chassis board obtained by integrally molding a synthetic resin or the like, and the lower part thereof forms a protruding surface lb so as to protrude from the upper surface la.

A printed circuit board 2 having a reel motor drive circuit is attached to the upper surface la by adhesive or the like, and a plurality of flat drive windings 3 are attached to two symmetrical locations of the printed circuit board 2 by adhesive or the like. It is attached depending on the method. A through hole 4 is provided in the two central portions surrounded by the windings 3, and a bearing portion 6 through which the rotor shaft 5 provided on the base plate 1 is inserted. The rotor shaft 5, on which the rotor 8 is fixed, is rotatably supported by the bearing portion 6 through a mounting boss 7. Furthermore, a magnet 9 having a large number of poles is attached to the inside of the rotor shaft 5 so as to face the drive winding 3 . A reel drive shaft 10 having a drive claw is attached to the end of the rotor shaft 5 by a known method. Reference numeral 11 denotes a brake lever rotatably attached to the base plate 1 on two support shafts 12, which are arranged symmetrically to each other.
The elastic force a causes the friction member 13 attached to the tip of the rotor 8 to constantly come into pressure contact with the circumferential surface of the rotor 8.

Reference numeral 14 denotes an L-shaped plate that is implanted on the back surface of the base plate 1 and is rotatable around a support shaft 15. A protruding pin 16 protruding from one end of the plate toward the front of the base plate 1 connects the two brake levers 11 with each other. It is designed to support the intersection of both, and the other end is regenerated,
The plunger 17 is connected to an actuating member 18 of a plunger 17 which is energized during recording, fast rewinding, and fast winding modes.

Reference numeral 19 denotes a head substrate that is slidable in the vertical direction by guide protrusions 20 and the like protruding from the substrate 1;
An erasing head 21 and a recording/reproducing head 22 are mounted on the head substrate 19 as shown.

Reference numeral 23 designates a bent piece that protrudes a part of the head substrate 19 downward so as to pass through a through hole (not shown) in the substrate 1, and this is connected to a protrusion 24 protruding from the lower part of the substrate 1. A spring 25 is stretched between them to constantly bias the head board 19 downward.

Reference numeral 26 denotes a pin that stands horizontally at the bottom of the head board 19. A torsion spring 27 is held on this pin 26, and one end of each pin is connected to a hole 28 provided in the head board 19.
and a locking piece 29.

Reference numeral 30 denotes an arm rotatably attached to the base plate 1 about a support shaft 31, and a pinch roller 32 is rotatably attached to the end of this arm 30.

Further, a locking piece 33 is disposed near the pinch roller 32 of the arm 30, and the other end of the spring 27 is locked to this to constantly bias the pinch roller 32 counterclockwise. . 34 is a capstan, which is directly connected to the shaft of a motor provided on the back side of the board.

Reference numeral 35 denotes a cassette holder that can be opened and closed upward, and both support plates 36 of the frame plate extend downward and are rotatably attached around two support shafts 37 attached to the board 1. A tongue piece 38 provided with a lotus on one side of this support plate 36,
A spring 40 is tensioned between the cassette holder 35 and the locking piece 39 protruding from the base plate 1, and biases the cassette holder 35 in the direction of opening.

Reference numeral 41 denotes an operating piece that is integrally attached to the right side of the frame plate of the cassette holder 35 and extends to the back surface of the board 1.

Further, 42 is a cassette eject operation village that appears and retracts from the lower right side of the substrate 1 in the horizontal direction. Note that 43 is a tape counter, and 44 is a pulley 45 of the tape counter 43.
and a pulley 46 associated with the reel drive shaft 10'. Next, the mechanism on the back side of the substrate 1 will be explained while looking at the configuration of the main parts shown in FIGS. 3 and 5.

As described above, the eject operating punch 42 is provided so as to slide through the front and back sides of the substrate 1, and the support shaft 47 is located behind it.
One end of an L-shaped lever 48 that rotates in the front-back direction about do,
It is locked to the bending piece 51 of the working village 50.

Further, a spring 52 is stretched between the lever 48 and the substrate 1, and this causes the lever 48 to move as shown in FIG.
It is designed to always be biased clockwise. A spring 53 is stretched between the operating punch 50 and the pin 54 on the top of the substrate 1.

Further, the operating punch 50' is provided with two clamping pieces 55 as shown in FIG. One end 57a of 57 is locked. Each of the rotary levers 57 is provided with a locking pawl 58 at its lower edge. The rotation lever 57 is constantly urged to rotate counterclockwise by the spring 53. Furthermore, the above-mentioned actuating piece 4 is shown in green above.
A notch 59 provided at the lower edge of 1 is adapted to be locked. Reference numeral 60 denotes a toothless gear having a notch 62 and teeth 63, which is attached to the base plate 1 so as to be rotatable about the support shaft 61. On the front surface of the toothless gear 60, the rotary lever 57 is attached.
The other end 57b is facing.

Reference numeral 64 indicates a locking piece protruding from the toothless gear 60, and reference numeral 65 indicates a cam roller with a smooth circumferential surface.
It is rotatably attached around 6.

Further, a spring 69 is provided on the back side of the toothless gear 60 between a pin 67 provided at a position approximately 180 degrees from the cam roller 65 and a locking piece 68 protruding from the base plate 1.
is installed. 701 is a gear attached to the capstan 34, and is adapted to mesh with the teeth 63 of the toothless gear 60.

A spindle 71 is provided on the board 1 near the capstan 34.
A rotary lever 72 is rotatably attached to this support shaft 71. One end 72a of the rotary lever 72 extends to the lower part of the support shaft 61, and the other end 72b is engaged with a protrusion 73 formed by bending the head board 19. Reference numeral 74 denotes a lotus village whose one end is freely attached around a supporting rod 75 attached to one end of the rotary lever 72, and a protrusion 76 of this lotus village 74 and a protrusion 77 provided on the base plate 1. In between, this lotus pestle 74
A spring 78 is provided to bias the spring 78 toward the right in FIG.

The other end of this lotus punch 74 is attached to a support shaft 81 to an operating punch 80 of a plunger 79 that is energized during recording or playback.
It is rotatably attached. In addition, 8 in Figure 4
Reference numeral 2 denotes a split groove provided in the rotating lever 72. Of the two pieces 83 and 84 separated by the split groove 82, a screw 85 is screwed into one piece 83, and the tip thereof is screwed into one piece 83. It comes into contact with the opposing surface of the other piece 83, and by screwing in this screw 85, the piece 83 is pushed open in the direction of the support shaft 61, and the turning lever 72 is rotated by the cam roller 65. The head board 19 is adjusted so that the amount of operation is large.
The amount of movement is increased. Next, the operation of the pause mechanism having such a configuration will be specifically explained.

First, the power switch of the cassette tape recorder main body is turned on, and the eject operation module 42 is pushed rearward in order to accommodate the tape cassette in the cassette holder 35.

By this pushing operation, the L-shaped lever 48 is rotated counterclockwise in FIG. 5 about the support shaft 47 against the spring 52. As a result, the actuating village 50 is urged downward against the spring 53, and the rotating lever 57, one end of which is interposed between the two clamping pieces 55, is moved against the supporting shaft 5.
6 in the clockwise direction in FIG. This rotation operation locks the upper edge of the rotation lever 57. The notch 59 of the actuating piece 41 is released from its lock, and due to the elastic force of the spring 40, the cassette holder 3
5 is opened toward the front about the support shaft 37. In this operating state, the locking piece 64 is engaged with the locking pawl 68, so that the notch 62 of the partially toothed gear 60 is connected to the gear 7 attached to the capstan 34. The river is opposite. Here, a tape cassette (not shown) is prepared and housed in the cassette holder 35 as is well known, and the cassette holder 35 is moved against the elastic force of the spring 40 to bring the tape cassette to the playing position. Push it in. As a result, the actuating piece 41 is pushed inside, but once the cassette holder 35 is almost completely closed, the notch 59 provided in the actuating piece 41 engages with the upper green of the rotating lever 57. and during this engagement,
Due to the bias of the spring 53, it rotates slightly counterclockwise about the pivot bar 57 and the support shaft 56. Due to this rotation, the locking piece 64 that has been engaged with the locking pawl 58 is disengaged, and the toothless gear 60 is slightly moved in the direction of the arrow by the bias of the spring 69. This rotation causes the tip 63a of the tooth 63 to rotate.
is engaged with the gear 70. This gya 70
1) When the power switch is turned on, it is simultaneously energized to rotate.
Since it is constantly rotating, the gear with missing teeth 60 depends on the above meshing.
continues to rotate further in the direction of the arrow against the spring 69, while the cam roller 65 rotates and the bar 72 continues to rotate.
By pressing down the piece 84a, the rotating bar 72 is urged to rotate clockwise about the support shaft 71. Therefore, the protruding piece 73 that is locked to the end portion 72b is pushed upward, and the head substrate 19 integrated therewith is pushed upward. This amount of pushing up is the pose position where the magnetic heads 21 and 22 face with a slight gap between them and the magnetic tape, and this gap can be arbitrarily selected by moving the screw 85 mentioned above in and out. . In this case, the pinch roller 32 also maintains a constant gap with respect to the capstan 34. In this state, the teeth 63 and the gear 70 are disengaged, and the other end of the locking piece 64 is held in the locking position on the rotating bar 57. That is, the pause mode is continued.
Therefore, in such a state, by operating the fast winding or fast rewinding operation button, the cue or review mode is immediately established. On the other hand, in such a state, when the eject operation village 42 is pushed in and an eject operation is performed, the lever 48 moves to the support shaft 47 as described above.
Rotate counterclockwise around , and push down the upper prototype work village 50.

As a result, the rotating lever 57 supported by the ball holding piece 55 is rotated clockwise about the support shaft 56, and the locking of the locking piece 64 to the end 57b is released. The locking piece 64 returns to the original locking position of the locking claw 58. At the same time, the engagement of the actuating piece 41 with the notch is released, and the cassette holder 35 is brought into an open state by the elastic force of the spring 40. As described above in detail, the present invention includes a cassette holder that guides a tape cassette to a playing position, a first rotating lever that is rotationally biased by the guiding operation of the cassette holder, and A locking part provided on the rotating bar, a gear attached to the capstan, and a toothless gear rotatably attached to the position facing the locking part, and the toothless gear is always kept in a predetermined position. A spring that tries to pull it back to the rotating position, a locking piece and a cam provided on this gear with missing teeth, a second rotating lever provided with one end facing this cam, and this second rotating lever. a head substrate associated with the other end, the first rotary lever is rotated by the guiding operation of the cassette holder, and the locking portion and the locking piece are engaged with each other; is released, the teeth of the toothless gear are forcibly engaged with the gear by the spring, the toothless gear is rotated, and the second rotating lever is rotated by the cam, By guiding the head board to the pose position, the magnetic tape can be immediately started running in cue or review mode, which simplifies and speeds up editing work, and eliminates unnecessary cues or review mode. Dedicated operation buttons and pause operation buttons can be omitted, and erroneous operation of operation buttons can be prevented.

Further, the structure for obtaining the above effects is simple and inexpensive, and has various effects such as being extremely useful in practical use.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 shows a specific configuration of the pause mechanism, and is a perspective view of the mechanism section of a cassette tape recorder with the external sparrow removed, FIG. 2 is a front view, and FIG. The drawings are a sectional view taken along the line A--A in FIG. 2, FIG. 4 is a front view showing the main parts of the mechanism on the back side of the board, and FIG. 5 is a side sectional view. 19...Head board, 35...Cassette holder, 5
7... First folding lever, 58... Locking portion, 60... Missing tooth gear, 64... Locking piece, 66... ...Cam, 69...Spring,
72...Second rotation/ゞ. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. A cassette holder that guides a tape cassette to a performance position, a first rotating lever that is rotationally biased by the above-mentioned guiding operation of this cassette holder, and a locking portion provided on this first lever. , a gear attached to the capstan,
A partially toothed gear rotatably attached to a position facing the locking portion, a spring that always tries to pull the partially toothed gear back to a predetermined rotational position, and a locking piece and a cam provided on the partially toothed gear. , a second rotary lever provided with one end facing the cam, and a head board associated with the other end of the second rotary lever; Rotate the first rotation lever,
The engagement between the locking portion and the locking piece is released, the teeth of the partially toothed gear are forcibly engaged with the gear by the spring, and the partially toothed gear is rotated. A pause mechanism in a cassette tape recorder, in which a second rotating lever is rotated to guide the head board to a pause position.