JPH021706Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a magnetic recording/playback device, and in particular to the improvement of a magnetic recording/playback device that controls a mechanism using a logic system. The present invention aims to provide a magnetic recording and reproducing device which is prevented from accidentally entering a music selection state, and conversely from accidentally entering a pause state when changing from a music selection state to a driving state.

An embodiment of this invention will be described below with reference to the drawings.

In Figs. 1 to 11, 1 is a base, 2 is a head board that is slidable by guiding a guide boss 8 and a rotating shaft embedded in this base, and 3 and 4 are fixed to this head board. These are the recording/playback head and the erasing head. Reference numeral 5 denotes a pinch roller rotatably attached to the rotating shaft 7, which is rotatably attached to the substrate 1 by a pinch roller spring 6, and is mounted in the direction of the capstan 12, which serves as a driving source for steady feeding of the magnetic tape. energized. 2a is a stopper that is planted on the head board and regulates the position of the pinch roller; 2c is a connecting piece that connects to a solenoid (not shown); and 2d is a contact portion that comes into contact with the guide boss 8 when the solenoid is operated. , 9 and 10 are a take-up reel stand and a supply reel stand, which are rotatably attached to the reel stand unit 38 as shown in FIG.
The reel stand unit 38 is fixed to the base 1. Reference numeral 11 denotes a brake plate that applies braking force to the take-up reel stand 9 and the supply reel stand 10, and a spring 19 causes the take-up reel stand 9 and the supply reel stand 1 to
It is biased in the 0 direction. Reference numeral 13 denotes an accidental erasure prevention lever rotatable by a pin 1a provided on the substrate 1, 14 a lever A rotatable by a pin 1b provided on the substrate 1, and 45 the aforementioned erase prevention lever. A spring 15 is stretched between the lever 13 and the lever A14, and a control plate 15 is slidable by guiding a pin 1c provided on the base plate 1, and a connecting piece 15c is provided on a part of the control plate. By engaging with the connection hole 2b provided in the head board 2, the movement position of the head board 2 and the lever A14 are adjusted.
The position of the accidental erasure prevention lever 13 is controlled by the engagement with the engagement piece 14a. Further, the position of the control plate 15 is regulated by contact between a stopper 43 provided on the base body 1 and the contact portion 15b. 20 is a spring stretched between the control plate 15 and the head base plate 2; 18 is a spring stretched between the control plate 15 and the base 1; 16 is a holder fixed to the base 1, 17 is an eject link that is slidable on the holder 16, and 23 is a lever that is rotatably attached by a rotation shaft 40 implanted in the holder. B is formed in an L-shape, and one side is in contact with the eject link 17, and the other side is arranged in a position where it abuts on the engagement piece 15a provided on the control plate 15. It is biased counterclockwise by a spring 26 stretched therebetween. A holding lever 22 is rotatably attached to a rotating shaft 39 implanted in the holder 16, and is biased clockwise by a spring 27. It has an engaging portion 22b that engages with the engaging piece 15a. 21 is a cassette holder provided with a pin 21b guided by a long hole 16a provided in the holder 16; 21a is this cassette holder 2;
A pressing portion provided on a portion of the holding lever 22 comes into contact with an abutting portion 22a provided on a portion of the holding lever 22. Reference numeral 25 denotes a lever c rotatably connected to the cassette holder 21, which is rotatable about a rotary shaft 16b implanted in the holder 16, and biased counterclockwise by a spring 28. Reference numeral 24 denotes an engagement lever which is rotatable around a rotation shaft 16c implanted in the holder 16 and is biased counterclockwise by a spring 29, which abuts a part of the control plate 15 and It is designed to engage with lever c25. 31 is a rotating shaft 36 installed in the reel stand unit 38.
A music selection holding lever is inserted through an elongated hole 46 and is attached so as to be slidable and rotatable by the size of the elongated hole, and an engaging portion 31a is provided at one end of the lever. 32 is a rotation shaft 36 installed in the reel stand unit 38.
It is inserted into the elongated hole 47 so that it can slide by the length of the elongated hole,
This is a rotatably attached temporary stop holding lever, and an engaging portion 32a is provided at one end thereof. 41
A spring urges the music selection holding lever 31 counterclockwise and the temporary stop holding lever 32 clockwise. Reference numeral 34 denotes a lever E rotatably attached to a rotating shaft 38a implanted in the reel stand unit 38, which contacts the music selection holding lever 31 and the temporary stop holding lever 32 to regulate their positions. . The mutual positional relationship between the music selection holding lever 31 and the temporary stop holding lever 32 and the head board 2 is as shown in FIG. Joint portion 31a, engagement portion 32 of temporary stop holding lever 32
It is designed to be near a. Reference numeral 35 denotes a link that is slidable on the reel stand unit 38, and the lever E34 rotates due to the sliding of this link. A spring 37 is stretched between the lever E34 and the link 35. 30
33 is a take-up idler that comes into contact with the take-up reel stand 9; 33 is a lever D rotatably attached to the reel stand unit 38; and is biased counterclockwise by a spring 33a. This lever D3
3 comes into contact with a part of the head board 2 and rotates as the head board 2 slides, and the winding idler 3
0 is pressed against the take-up reel stand 9. 42 is a magnetic tape.

Next, the operation of the magnetic recording and reproducing apparatus configured as described above will be explained.

1 and 2 show a state in which the recording/reproducing head 3 is farthest away from the magnetic tape 42 as shown in FIG. 11A, that is, a state in which the cassette holder 21 is opened. At this time, the control plate 15 is pressed downward in the figure by the lever B23, and the engagement part 22b of the holding lever 22 and the engagement part 1 of the control plate 15 are connected to each other.
5a and are held together. By this holding, the head board 2 with the recording/reproducing head 3 and the erasing head 4 attached is moved downward by the spring 20, and the connection piece 15c of the control plate 15 and the connection hole 2b of the head board 2 are moved downward.
The magnetic tape 42 and the recording/reproducing head 3 are held at the most distant position as shown in FIG. 11A. At this time, the engagement piece 2e provided on the head board 2 has a positional relationship as shown in FIG. It comes into contact with the tip of the temporary stop holding lever 31 and prevents it from rotating clockwise. From this state, the tape cassette is inserted into the cassette holder 21, and the cassette holder 21 is pressed by hand to bring it into the magnetic tape drive state shown in FIGS. 3 and 4. Due to this pressing, the pressing portion 21a of the cassette holder 21 comes into contact with the abutting portion 22a of the holding lever 22, and the holding lever 22 is rotated counterclockwise against the spring 27. This rotation causes the engagement portion 22b of the holding lever 22 and the engagement piece 15 of the control plate 15 to
a is released, the control plate 15 is moved upward by the spring 18, and the contact portion 15b provided on the control plate 15 is disengaged from the stopper 4 provided on the base body 1.
3 and the control plate 15 is positioned. Due to this movement of the control plate 15, the head board 2 is moved upward due to the engagement of the connection hole 2b of the head board 2 with the connection piece 15c of the control board 15. In this way, the control board 15
When the movement of the head board 2 is completed, the lever c25, which is rotatably connected to a part of the cassette holder 21 and rotatably attached to the pin 16b, rotates clockwise against the spring 38, and the lever c25
3 and 4 engage with the engagement lever 25.
Hold the control board 15 and head board 2 as shown in the figure,
The magnetic tape 42 and the recording/reproducing head 3 are held at a position where the recording/reproducing head 3 is slightly separated from the magnetic tape 42, as shown in FIG. 11B. At this time, the engaging piece 2e provided on the head board 2 also moves upward, but the music selection holding lever 31 and the temporary stop holding lever 32 rotatably attached to the reel stand unit 38 also move upward.
and have a positional relationship as shown in Figure 10B,
It comes into contact with the tip of the temporary stop holding lever 31 and prevents it from rotating clockwise.

In order to change from this driving state to the recording/playback state shown in FIG. 5, when the connecting piece 2c is sucked by the first solenoid (not shown), the head board 2 moves upward and the abutting part of the head board 2 is moved upward. The magnetic tape 42 and the recording/reproducing head 3 are positioned in contact with the guide boss 8, and the recording/reproducing head 3 is positioned in contact with the magnetic tape 4 as shown in FIG. 11D.
This is the position where 2 is pushed in. At this time, a magnetic tape 42 is inserted into the capstan 12 which is rotated by a motor (not shown) on the base 1, and as the head board 2 moves upward, a rotatable pinch roller 5 is attached to the head board 2. pinch roller spring 6
The magnetic tape 42 is brought into pressure contact with the magnetic tape 42, and the magnetic tape 42 is placed in a steady feeding state. Further, the brake plate 11 has one end in contact with the head board 2, moves as the head board 2 moves upward, and is released from contact with the take-up reel stand 9 and the supply reel stand 10, and the take-up reel stand is moved. 9. The supply reel stand 10 is rotatable so that the magnetic tape 42 can be supplied and wound. At this time, the lever D33, which is rotatable on the reel stand unit 38, rotates counterclockwise as the head board 2 moves upward, bringing the take-up idler 30 into contact with the take-up reel stand 9, and the take-up reel It is designed to apply rotational force to the table 9. Furthermore, at this time,
The engaging piece 2e provided on the head board 2 moves upward, and the music selection holding lever 31 and the temporary stop holding lever 32 attached to the reel stand unit 38 are moved upward.
The positional relationship is as shown in Figure 0 D, and the engaging piece 2
The position e is located above the engaging portion 31a of the music selection holding lever 31 and the engaging portion 32a of the temporary stop holding lever 32, and the temporary stop holding lever 32 is rotated clockwise.

In order to change the recording/playback state to the pause state shown in FIG. 6, the first solenoid which was suctioning the connecting piece 2c is released from suction, and the head board 2 is moved downward by the spring 20. In this movement, the engaging piece 2e provided on the head board 2 engages with the engaging portion 32a of the temporary stop holding lever 32 attached to the reel stand unit 38. Due to this engagement, the temporary stop holding lever 32 moves by the length of the elongated hole 47 against the spring pressure of the spring 41.
As shown in FIG. C, the head board 2 is held with a difference in level from the music selection holding lever 31. Therefore, the movement of the head board is small, and the magnetic tape 42 and the recording/reproducing head 3 are in contact with each other as shown in FIG. 11C. At this time, the pinch roller 5 moves together with the head substrate 2 and is at a position separated from the capstan 12. Further, the brake plate 11 moves together with the head board 2, but the take-up reel stand 9, the supply reel stand 1
It is not close to 0 but is far away. In order to return to the recording/playback state shown in FIG. 5 from this paused state, the head board 2 may be moved upward by the first solenoid. In addition, in order to change the drive state from the paused state to the drive state shown in FIG. and rotate the link 35 counterclockwise by pushing down, and rotate the temporary stop holding lever 32 counterclockwise against the spring 41 to release the engaging portion 32a and the engaging piece 2e of the head board 2. When the engagement is released, the head board 2 is moved downward by the spring 20, and the magnetic tape 42 and the recording/reproducing head 3 are brought into the driving state shown in FIG. 11B. At this time, since there is a step between the temporary stop holding lever 32 and the music selection holding lever 31, the lever E34
This rotation prevents the engaging portion 31a of the music selection holding lever 31 from accidentally engaging the engaging piece 2e of the head board 2, that is, the music selection state.

Next, the operation when changing from the recording/playback state to the fast forwarding or rewinding state will be explained. First, when the suction of the first solenoid that maintains the recording/playback state is released, the head board 2 is moved downward by the spring 20, and the engaging piece 2e provided on the head board 2 is moved downward.
and the engaging portion 32a of the temporary stop holding lever 32 attached to the reel stand unit 38 engage as shown in FIG. 10C. In this state, when the second solenoid is next sucked, the link 35 attached to the reel stand unit 38 is pushed down, the rotatable lever E34 is rotated counterclockwise, and the temporary stop holding lever 32 is rotated. By rotating counterclockwise against the spring 41, the engaging portion 32a and the engaging piece 2e of the head board 2 are disengaged, and the head board 2 is further moved downward by the spring 20, and the magnetic tape 42 and the recording/playback head 3, and the 11th
The fast forward/rewind state is the same as the drive state in Figure B. At this time, the brake plate 11 is separated from the take-up reel stand 9 and the supply reel stand 10 by some means and is rotatable.

Next, we will explain the operation when changing from the recording/playback state to the fast-forward/rewind state when the magnetic tape 42 and the recording/playback head 3 are in contact as shown in FIG. I will clarify. First, while the first solenoid is sucking and is in the recording/playback state, the second solenoid is operated to push down the link 35 and rotate the lever E34 counterclockwise. This rotation allows the reel stand unit 38 to rotate freely around the rotation shaft 36, and the spring 41 biases the lever E3 in the counterclockwise direction.
4, the music selection holding lever 31 was positioned by
rotates counterclockwise. Next, in this state, the first
When the suction of the solenoid is released, the head board 2
moves downward, and the engaging piece 2e provided on the head board 2 and the engaging portion 31a provided on the music selection holding lever 31 engage with each other. Due to this engagement, the music selection holding lever 31 is moved by the length of the elongated hole 46, and the spring 41
The magnetic tape 42 and the recording/reproducing head 3 are moved against the spring pressure of FIG. position, the take-up reel stand 9 and the supply reel stand 10 enter the fast forward/rewind state, and the song selection is maintained.

Next, in order to change from the song selection state to the recording/playback state, first, the suction of the second solenoid is released, and the link 35 is pushed upward and the lever E34 is rotated clockwise by the spring 37. This rotation causes the music selection holding lever 31 to rotate clockwise, and the engagement between the engaging piece 2e of the head board 2 and the engaging portion 31a of the music selection holding lever 31 is released. At this time, since there is a step difference between the music selection holding lever 31 and the pause holding lever 32, the rotation of the lever E34 may cause the engagement portion 32a of the pause holding lever 32 to accidentally engage with the engagement piece 2e of the head board 2, i.e. It is designed so that it does not become temporarily stopped. In addition, fast forwarding and rewinding for song selection are canceled, and then the head board 2 is moved upward by the operation of the first solenoid, and the same operation as the above-mentioned transition from the drive state to the recording/playback state is performed, and the head board 2 is moved upward. 2 engaging piece 2e
As shown in FIG. 10D, the engaging part 31a of the music selection holding lever 31 and the engaging part 3 of the pause holding lever 32
2a, and the recording/reproducing head surface 3 is in the position where the magnetic tape 42 is pushed in, as shown in FIG. 11D, and is in a recording/reproducing state.

Furthermore, in order to change from the recording/playback state to the driving state, the suction of the first solenoid is released, the state is set to the paused state as described above, and the second solenoid is further suctioned, and the drive is activated from the paused state described above. The driving state shown in FIG. 10B can be obtained by performing the operation to change the state.

Next, in order to change the cassette holder 21 from the driven state shown in FIG. 4 to the opened state shown in FIG. 2, slide the eject link 17 to the left in FIG. The lever B23, which is rotatable on the shaft 40, is rotated clockwise. This rotation causes the lever B23 to move the engagement piece 1 of the control plate 15.
5a is pushed down, and the control plate 15 and the head board 2, which is stretched between the control plate 2 and the spring 20, move downward. Further, as the control plate 15 moves downward, it is made rotatable by a pin 16c provided on the holder 16 and biased counterclockwise, and the engagement lever 24 is rotated clockwise.
The lever C25, which had been engaged with 4 to place the cassette holder 21 in the position shown in FIG. 21 uses the elongated hole 16a of the holder 16 as a guide, and moves as shown in FIG. 2 to be in the open state. When the control plate 15 moves further downward and the engagement piece 15a of the control plate 15 is below the engagement part 22b of the holding lever 22 which is rotatable on the holder 16,
The holding lever 22 is rotated clockwise by the spring 27, and the engaging piece 15a of the control plate 15 and the engaging portion 22b of the holding lever 22 engage with each other. By this engagement, the control plate 15 and the head board 22 are positioned as shown in FIG. 1, and the magnetic tape 42 and the recording/reproducing head 3 are in the positional relationship shown in FIG. 11A, and the cassette holder 21 is opened as shown in FIG. The state will be as follows.

Next, the operation of the erroneous recording prevention lever 13 will be explained. When the cassette holder 21 shown in FIGS. 1 and 2 is open, that is, when the cassette tape can be inserted, the erroneous recording prevention lever 13 is brought into contact with a part of the lever A14 by the lever A14 linked to the control board 15. The counterclockwise rotation is prevented by the spring 45, and the position is regulated upward as shown in FIG. 1, so that the insertion of the cassette tape is not obstructed. When a cassette tape is inserted into the cassette holder 21 from this state and the cassette tape is driven, the lever A14 is rotated clockwise due to the upward movement of the control plate 15. Due to this rotation, the erroneous recording prevention lever 13, which had been prevented from rotating counterclockwise, is rotated counterclockwise by the spring 45, and in the driven state is in the detection state as shown in FIG. 3.

As mentioned above, the magnetic recording and playback device of this invention is
A long hole is provided in each of the pause holding lever and music selection holding lever, which are provided on the same axis as the engagement piece provided on the head board. By providing a step, it is possible to prevent the system from accidentally selecting a song from a pause, or from selecting a song to a pause, making it highly reliable.

[Brief explanation of the drawing]

Each of the drawings shows an embodiment of this invention, and FIGS. 1 and 2 are front and side views of the cassette holder in the open state, and FIGS. 3 and 4 are front views of the cassette holder in the closed and driven state. , a side view, FIG. 5 is a front view of the recording/playback state, FIG. 6 is a front view of the paused state, and FIG. 7 is a front view of the reel stand unit.
Fig. 8 is a perspective view of the control plate portion, Figs. 9 and 10 are perspective views and front views showing the relative relationships between the engaging piece of the head board, the temporary stop holding lever, and the music selection holding lever, and Fig. 11 is a front view. FIG. 3 is a front view showing the positional relationship between the magnetic tape and the head. In the figure, 1 is a base body, 2 is a head board, 2e is an engaging piece, 3 is a recording/playback head, 21 is a cassette holder, 31 is a music selection holding lever, 31a is an engaging part, 32 is a temporary stop holding lever, and 32a is a Engagement part, 34 is a lever, 36 is a shaft, 41 is a spring, 42 is a magnetic tape, 46
47 is an elongated hole of the music selection holding lever, and 47 is an elongated hole of the temporary stop holding lever. Note that the same reference numerals in the figures represent the same parts.

Claims (1)

[Scope of utility model registration request] A head board that is slidable on a base body and has a recording/playback head attached thereto, an engaging piece formed on the head base board, and a common axis provided on the base body that is rotatable and displaceable. The cassette holder consists of a temporary stop holding lever and a song selection holding lever that have elongated holes and are biased by a spring in the direction of the engaging piece, and a lever that regulates the position of the temporary stop holding lever and song selection holding lever. Attaching the lever so as to prevent the rotation of the song selection holding lever when opening the cassette holder, closing the cassette holder, recording and playback, and pausing, and prevent the rotation of the pause holding lever when selecting a song; When pausing, the engagement piece on the head board engages with the pause holding lever to displace the position of the pause holding lever, and when selecting a song, the engagement piece on the head board engages with the music selection holding lever to move the music selection holding lever. A magnetic recording and reproducing device characterized in that the position of the head board is regulated by displacing the head board.