JPS6115505B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cassette tape recorder,
In particular, the present invention relates to a cassette tape recorder characterized by having a so-called auto-replay function that releases the rewinding mechanism and automatically returns to the playback state when the rewinding of the tape is completed.

In conventional cassette tape recorders,
When playing a partially wound tape from the beginning, first perform a rewind operation to rewind the tape to the beginning, then perform a playback operation to play from the beginning of the tape, but in this case two operations are required. Since there is a need for simple operation of in-vehicle cassette tape recorders that are operated while driving, an auto-replay function that automatically returns to playback mode when rewinding is completed has been introduced. It was requested.

Therefore, the present invention has been made in view of this point.
If the end of the tape is reached during playback or fast-forwarding, the cassette is ejected, but if the end of the tape is reached during rewinding, the rewinding mechanism is released upon detecting the end of the tape and automatically returns to playback. The present invention provides a cassette tape recorder equipped with an auto-replay function configured to perform the following functions.

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

FIG. 1 shows a plan view of an in-vehicle cassette tape recorder embodying the present invention, in which guide shafts 3, 3 installed in the chassis 2 are accommodated in elongated holes 4, 4, and can be slid left and right. On the installed head board, the magnetic head 5 is mounted, one end is engaged with a pinch lever 8 which supports a pinch roller 7 with a bent piece 6, and is biased leftward by a coil spring 9; is engaged with a protruding shaft 11 provided on the ejection lever 10, thereby restricting its sliding to the left, and in the stopped state, the magnetic head 5 pinch roller 7 moves away from the cassette loading path.
Further, from the head board 1, an engaging pin 12 which operates during fast forwarding or rewinding is provided so as to penetrate through the chassis 2 and protrude downward. The eject lever 10 connects the chassis shafts 13, 13 to the lower part of the chassis 2 through the elongated holes 1
4 and 14, and is provided so as to be slidable back and forth, and is biased forward by a spring 15. However, when the eject lever 10 is stopped, the cut-out piece 16 of the eject lever 10 is locked by the lock lever 17, so that the spring 15 It is in a position where it has been slid backwards against the force of the At this time, the guide pin 19 provided on the cassette holder 18 is positioned above the guide groove 21 formed in the bent piece 20 of the eject lever 10, so that the cassette holder 18 is in the upper non-playing position. (See Figures 2 and 3).

FIG. 4 shows a tape drive mechanism installed below the chassis 2, 22 and 23 are a take-up reel shaft and a supply reel shaft, and during playback or quick speeding, the driving force of the motor is transmitted through the rubber belt 24. A gear 25 is connected to the take-up reel shaft 22 via an idler gear 26, and is connected to the drive gear 25 during rewinding.
is configured to be directly connected to the supply reel shaft 23, and is rotatably mounted on the chassis shaft 27 so that the drive gear 25 is selectively engaged with the idler gear 26 and the supply reel shaft 23. Board 28
It is pivoted on top. 29 is the chassis shaft 30,3
0 is accommodated in the long holes 31, 31, and is provided so as to be able to slide back and forth.
A tapered side 32 is formed that contacts the engagement pin 12 extending downward, and a coil spring 3 wound around the chassis shaft 34 is provided between the side piece 33 and the switching plate 28.
5 is installed, and the drive gear 25 is connected to the idler gear 2.
It is biased in six directions, and the rewind lever 29 is biased forward. 36 is a locking member that locks the rewinding lever 29 in the operating position where it is slid rearward, and the rewinding lever 29 is locked when the bent piece 37 engages with the engagement step 38 of the rewinding lever 29. In order to lock it, it is biased counterclockwise by a spring 39 suspended between the bending piece 37 and the chassis shaft 30.

Reference numeral 40 denotes a chassis shaft 4 so as to be slid forward when a tape end detection mechanism (not shown) detects the end of the tape.
1 and 41 are housed in the elongated holes 42 and 42, and the eject auxiliary lever is energized rearward by the spring 43.
A protruding shaft 44 whose one end is implanted in the eject lever 10
is housed in the small hole 45, and the other end on which the engagement shaft 48 of a rotation lever 47 is rotatably mounted on the pivot shaft 46 is overlapped. The eject assist lever 40 also has a support shaft 49 fixed on the lever.
A ratchet plate 50 is provided swingably energized by a coil spring 51 wound around the support shaft 49, and one side of the ratchet plate 50 is provided to prevent movement of the engaging shaft 48 of the rotary lever 46. A notch 52 is formed to allow this, and one end of the notch 52 is configured to lock the engagement shaft 48. 53, 54
A rotating plate and a rocking plate are rotatably connected by a shaft 55. The rotating plate 53 is pivotally supported by a chassis shaft 56, and one end thereof is overlapped with one end of the ratchet plate 50, and the rotating plate 53 is rotated. The ratchet plate 50 is caused to swing by coming into contact with the V-shaped bent top portion of the ratchet plate 50. On the other hand, an arc-shaped long groove 57 is formed in the swing plate 54, and the side piece 3 of the rewind lever 29
The shaft 58 installed in the shaft 3 is housed therein. In the stopped state, the rotating plate 53 and the swinging plate 54 are connected to the coil spring 59.
, the shaft 58 of the rewind lever 29 is located at one end of the long groove 57 of the swing plate 54 .

Although the fast-forward lever is not particularly shown in the drawings, it is provided with a tapered side and an engagement step similar to the rewind lever 29, and is provided on the chassis shafts 30, 30 so as to overlap with the rewind lever 29. . A tape end detection device (not shown), as described in Japanese Patent Publication No. 52-29179, detects the stoppage of rotation of a reel shaft at the end of a tape and moves an operating member using the driving force of a motor. A device is used that allows the device to stop and stop or eject.

Next, the operation of the present invention having such a configuration will be explained.

First, when the cassette 60 is loaded into the cassette holder 18 in a stopped state in which the eject lever 10 is locked at the rear position and the cassette holder 18 is in the upper non-playing position as shown in FIG.
When the side surface of the cassette 60 contacts the lock lever 17 and the lock lever 17 is rotated counterclockwise, the eject lever 10 is unlocked and slid forward under the force of the spring 15. As the eject lever 10 slides forward, the guide pin 19 of the cassette holder 18, which is engaged with the guide groove 21 of the bent piece 20 of the eject lever 10, is moved below the guide groove 21. As a result, the cassette holder 18 is moved downward to the performance position, the cassette 60 is engaged with the take-up reel shafts 22 and 23, and the head board 1 and the protruding shaft 11 provided on the eject lever 10 are engaged with each other. When the head board 1 is released, the head board 1 is slid to the left under the force of the coil spring 9, the magnetic head 5 is inserted into the cassette 60 and is pressed against the tape, and the pinch roller 7 is pressed against the capstan 61. , the tape is transferred from the supply reel shaft 23 to the take-up reel shaft 22 and enters the playback state. At this time, Ijieku lever 10
By sliding forward, the rotating lever 47
is rotated counterclockwise, and the engaging shaft 48 of the rotating lever 47 is engaged with the locking portion of the ratchet plate 50 (see FIGS. 6 and 7).

Therefore, when the end of the tape is reached during playback, the eject auxiliary lever 40 is slid forward against the bias of the spring 43 due to the operation of a tape end detection device (not shown), and rotates with the ratchet plate 50. When the lever 47 engages with the engagement shaft 48, the rotating lever 4
7 is turned clockwise, and the eject lever 1
Slide 0 backwards. When the ejector lever 10 slides rearward, the protruding shaft 11 collides with the tapered side 62 of the head board 1, so that the head board 1 is slid rightward, and the magnetic head 5 and pinch roller 7 are moved toward the cassette 60. As it moves away from the cassette holder 18, the cassette holder 18 is moved upward, and the switching piece 16 of the eject lever 10 is further locked by the lock lever 17, returning to the stopped state. Even in the fast forward state, the stop state is restored in the same manner when the end of the tape is reached.

Next, in the above-mentioned playback state, the rewind lever 29
The rewinding state shown in FIG. 8 in which is operated will be explained. If the rewind lever 29 is operated at this time,
First, the tapered side 32 of the rewinding lever 29 collides with the engaging pin 12 protruding downward from the head board 1, so that the head board 1 is slid to the right against the bias of the coil spring 9, and the magnetic head 5 is moved. At the same time, the pinch roller 7 is moved away from the cassette 60, the switching plate 28 is rotated counterclockwise by the action of the coil spring 35, the drive gear 25 is connected to the supply reel shaft 23, and the tape is transferred to the supply reel shaft 23.
Rewind to Also, when the rewind lever 29 is pressed, the swing plate 5
4, the swing plate 54 is moved rearward together with the rewind lever 29, and the swing plate 53 is rotated counterclockwise against the bias of the coil spring 59. As a result, one end of the rotating plate 53 comes into contact with the V-shaped portion of the ratchet plate 50 and presses the ratchet plate 50 at the apex of the V-shaped portion, so that the ratchet plate 50 resists the bias of the coil spring 51. 9, the engagement between the ratchet plate 50 and the engagement shaft 48 of the rotating lever 47 is released. When the rewinding lever 29 performs the above-described operation by pressing, the engagement step portion 38 is engaged with the bent piece 37 of the locking member 36, and the rewinding lever 29 is locked in the pressed position. In this state, when rewinding progresses and the end of the tape is reached, the eject auxiliary lever 40 is slid forward by the operation of the tape end detection device as described above, but in this case, the ratchet plate 50 is swung,
Since engagement with the rotating lever 47 is prevented by the rotating plate 53, the eject auxiliary lever 4
The rotation lever 47 and the eject lever 10 are not affected in any way by the sliding movement of 0, and the bent piece 63 of the eject auxiliary lever 40 comes into contact with the rotating plate 53 and presses it due to the sliding movement of the eject auxiliary lever 40. As a result, the rotating plate 53 is further rotated counterclockwise,
By transmitting this rotation to the swing plate 54,
The swing plate 54 contacts the bent piece 37 of the locking member 36, rotates the locking member 36 clockwise, and disengages the rewinding lever 29 from the engagement step 38. The rewinding lever 29 is returned to the front under the force of the coil spring 35, and the rewinding state is released.
When the rewind lever 29 is released, the head board 1 is slid to the left under the force of the coil spring 9, and the magnetic head 5 is
Then, the pinch roller 7 is reinserted into the cassette 60, and the switching plate 28 is rotated clockwise under the force of the coil spring 35, thereby connecting the drive gear 25 to the idler gear 26 and returning to the regeneration state. be done. At this time, as the eject auxiliary lever 40 is slid back to the rear under the force of the spring 43, the ratchet plate 50 is again engaged with the engagement shaft 48 of the rotary lever 47. The above explanation was based on the case where the rewinding state was continued until the end of the tape, but if rewinding is to be stopped midway, the locking plate 36 is slightly rotated by operating a fast-forward lever (not shown). As a result, the rewind lever 29 is unlocked, and the playback state can be returned immediately.

As described above, the cassette type tape recorder of the present invention is provided with a means for selectively connecting the tape end detection operation by the tape end detection device to the eject mechanism, and the connection is made when restarting or fast forwarding, and the eject operation is performed at the end of the tape. By releasing the connection during rewinding, the rewinding state is released by detecting the end of the tape without performing an eject operation at the end of the tape, so the rewinding state is automatically returned to the playback state and the tape can be played from the beginning. This is especially useful when applied to car-mounted cassette tape recorders.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the cassette tape recorder of the present invention, FIG. 2 is a front view, FIG. 3 is a side view, FIG. 4 is a plan view showing the bottom of the chassis, and FIG. FIG. 6 is a side view showing the main parts of FIG. 6, FIG. 7 is a side view showing the main parts of FIG. 6, FIG. 8 is a plan view showing the rewinding state, and FIG. FIG. 9 is a side view showing the main part of FIG. 8; 1... Head board, 2... Chassis, 10...
Eject lever, 17... Lock lever, 18
...Cassette retainer, 22...Take-up reel shaft, 2
3... Supply reel shaft, 29... Rewinding lever, 4
0... Eject auxiliary lever, 47... Rotating lever, 50... Ratchet plate, 53... Rotating plate, 5
4... rocking plate, 60... cassette.

Claims (1)

[Claims] 1. A tape end detection device, a cassette ejection mechanism, an eject auxiliary lever operated by the detection device, a means for selecting connection between the lever and the eject mechanism, a rewind lever locking means, and a rewind lever. The control means controls the selection means by operating a lever, and the control means controls the selection means by operating a rewind lever, releases the connection between the eject auxiliary lever and the eject mechanism, and when the end of the tape is reached, the selection means is controlled. A cassette type tape recorder characterized in that the eject auxiliary lever operates a control means and returns to a playback state by releasing a rewind lever locking means.