JPH0412530B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a mechanism for canceling a song interval detection operation in a tape recorder that can detect the song gaps on a tape and locate the beginning of the song. In particular, the configuration is simplified and the cost is reduced.

[Technical background of the invention and its problems] Conventionally, the inter-music detection operation has been canceled by operating a plunger when detecting an inter-musical interval.
In order to cancel this during detection, a method is generally used in which a switch is electrically operated to cancel the detection. However, such a conventional song interval detection/cancellation mechanism has been problematic in that it is structurally complex and requires an increased number of parts, and is expensive due to electrical cancellation. In addition, such a complicated structure increases the size of the tape recorder, making it impossible to meet the demand for smaller tape recorders, especially for tape recorders that are stored in limited spaces such as those used in cars. ,
This was a major drawback.

[Object of the Invention] The present invention was proposed in order to solve the problems of the prior art as described above, and its purpose is to reduce costs by simplifying the configuration and reducing the number of parts. Moreover, it is an object of the present invention to provide a song interval detection canceling mechanism for a tape recorder that allows the tape recorder to be miniaturized.

[Summary of the Invention] The song interval detection and release mechanism in the tape recorder of the present invention holds the fast forward and rewind levers on the plunger with a lock plate having a suction piece attached to one end that is suctioned on the suction plunger. The lock plate is swingable relative to the suction piece through a connecting portion, and a lock pin for locking the fast forward/rewind lever is provided at the other end of the lock plate, and a guide elongated hole is provided approximately in the center to guide the lock plate. A fixing pin is inserted into the elongated hole, and between the lock plate and this fixing pin, the lock plate is urged in the locking direction centering on the connecting part between the lock plate and the suction piece, and the guide elongated hole of the lock plate is pressed. By attaching the first spring for abutting the fixing pin to one side, when the plunger is attracted while detecting the distance between tracks, by pressing the lever that is not locked, the lever locks the lock plate. In this state, the guide hole of the lock plate is movable relative to the fixing pin, so the lock plate moves against the first spring around the connecting part with the suction piece. The switch rotates in the release direction, and the song interval detection operation is released. In this case, the guide elongated hole moves in the opposite direction to the fixed pin.

Further, the lock plate has a mechanism for urging the lock plate in the locking direction around the fixing pin when the lock plate is biased by the first spring and the fixing pin is in contact with one of the elongated guide holes. By providing a second spring, when you start detecting between songs during play, you can press either the fast forward or rewind lever.
The protruding part of the lever presses the lock pin of the lock plate, but at this time, one of the elongated guide holes of the lock plate is in contact with the fixed pin by the first spring, so the lock plate rotates around the fixed pin. It is once rotated in the release direction against the second spring. After the protruding portion of the lever passes over the lock pin of the lock plate, the lock plate rotates about the fixing pin in the locking direction due to the biasing force of the second spring, and is attracted to the plunger to lock the lever.

[Embodiment of the Invention] An embodiment of the inter-track detection canceling mechanism for a tape recorder according to the present invention as described above will be specifically described with reference to the drawings.

As shown in FIG. 1, the fast forward lever 1 and the rewind lever 2 are each provided with a connecting portion a to the head plate side and a protruding portion c forming the locking portion with a locking portion b. Both levers 1 and 2
are connected to a cam plate 4 having a cam portion d via respective connecting portions a, and a connecting pin of a head plate 6 having a head 5 is connected to the cam portion d of the cam plate 4. e is inserted, and this structure allows the cam plate 4 and head plate 6 to interlock, and at that time, the reel bases 7 and 8 are rotated by a structure not shown.
That is, by pressing either lever 1 or 2, the head plate 6 moves via the cam plate 4, retreats to a position where the head 5 on the plate 6 lightly contacts the tape, and the reel base 7,
8 is rotated to fast forward or rewind.

On the other hand, the retention of both levers 1 and 2 on the suction plunger 9 is achieved by
0 is attached to one end of the lock plate 11, and this lock plate is swingable relative to the suction piece 11 via a connecting portion 12. and,
A lock pin 13 for locking the fast-forward and rewind levers 1 and 2 is provided at the other end of the lock plate 11, and when each lever 1 and 2 is pressed to a predetermined position, the lock portion b is locked. It seems to be engaged.

Further, a guide elongated hole 14 is provided in the center of the lock plate 11, and a fixing pin 15 is inserted into this guide elongated hole 14. A first spring 16 is installed between the fixing pin 15 and the lock plate 11, and this causes the lock plate 11 to move in its locking direction (see Fig. Therefore, the fixing pin 15 is always biased toward one side of the guide elongated hole 14 of the lock plate 11 (towards the right in the figure) relative to the lock plate 11.
It is biased so that it comes into contact with.

Furthermore, the lock plate 11 is provided with a second spring 17, which allows the lock plate 11 to hold the fixing pin 15 when the fixing pin 15 is in the normal abutting state as described above. The center is biased in the locking direction (clockwise in the figure).

In addition, the fast forward and rewind levers 1 and 2 are
As shown in the drawings after FIG. 2, the spring 18,
It is urged in the backward direction (downward in the figure) at 19.

The operation of the present invention having the above configuration is as follows.

First, in the play state, as shown in FIG. 2, the fast forward and rewind levers 1 and 2 are in the retracted position, and therefore the head plate 6, not shown in the figure, is in the forward position. In this case, since the suction plunger 9 is in an excited state, the lock plate 11
The suction piece 10 is suctioned to the suction plunger 9, and the lock plate 11 is positioned in the locking direction by the first and second springs 16 and 17.
Therefore, the fixing pin 15 is in contact with the guide elongated hole 14 of the lock plate 11. Further, the lock pin 13 of the lock plate 11 is in contact with the tips of the protruding portions c of the fast forward and rewind levers 1 and 2.

In this state, when starting song interval detection, first press the rewind lever 2 of the fast forward and rewind levers 1 and 2, as shown in FIG. presses the lock pin 13 of the lock plate 11. In this case, the lock plate 11 is locked in the lock direction (clockwise in the figure) by the first spring 16 as shown in FIG.
The fixing pin 15 is biased against the lock plate 11.
Since the lock plate 11 is in contact with the guide elongated hole 14, the lock plate 11 rotates about the fixing pin 15 in the release direction (counterclockwise in the figure) against the second spring 17.

Furthermore, when the rewind lever 2 is pushed in and moved forward to a predetermined position, the protruding portion c of the lever 2
lock pin 13 because it overcomes lock pin 13.
is released from the pressure in the release direction, and as a result, the lock plate 11 is rotated in the lock direction about the fixing pin 15 by the second spring, and the lock plate 11 is rotated in the lock direction by the second spring.
is engaged with the lock portion b, and the rewind lever 2 is locked onto the lock plate 11 as shown in FIG. At this time, by passing a current through the suction plunger 9, the suction piece 10 is attracted, thereby maintaining the lock, and detecting the song interval.

This inter-track detection is performed until the inter-track interval (non-recording band) of the tape reaches the head 5. When the inter-track interval is reached, a detection circuit (not shown) is activated to stop the current flowing through the suction plunger 9. , the fast forward/rewind operation is automatically canceled. and,
As the suction plunger 9 no longer suctions the suction piece 10, the lock plate 11 is moved around the fixing pin 15 by the second spring 17 as shown in FIG.
The taper of the lock portion b rotates in the release direction (counterclockwise in the figure) against the rotational speed, the lock pin 13 comes off, and the rewind lever 2 returns to the rear by the spring 19.

Canceling the operation during the song interval detection operation as shown in FIG. 4 (before the song interval is reached) can be easily performed by manual operation of pressing the fast forward lever 1. That is, when the fast forward lever 1 is pressed, the lever 1 presses the lock pin 13 at the tip of the protruding portion c, and this lock pin 13 is disengaged from the lock portion b of the rewind lever 2, and the rewind lever 2 is moved to the fifth position. As shown in the figure, it returns to the rear by the spring 19,
As a result, the inter-track detection state is canceled. In this case, since the song interval detection is in progress, the suction piece 10 is suctioned by the suction plunger 9 as shown in the figure, so the rotation of the lock plate 11 is due to the connection between the suction piece 10 and the lock plate 11. It is carried out against the first spring 16 around the part 12,
Therefore, the guide elongated hole 14 of the lock plate 11 moves to the right in the figure with respect to the fixing pin 15.

In addition to the above-mentioned manual release method, an electrical release method is also available in which the electric current of the suction plunger 9 is stopped in the state shown in FIG. Similarly, the lock plate 11 rotates about the fixing pin 15 in the releasing direction (counterclockwise in the figure) against the second spring 17, returning to the state shown in FIG. 3.

In this way, the present invention has a simple structure in which a single lock plate is provided with a suction part, a connecting part thereof, a guide elongated hole, and a lock pin. Two types of release are possible: manual operation and electrical operation. Therefore, compared to conventional mechanisms, the number of parts is significantly reduced, the entire tape recorder can be made smaller, and costs can be reduced. Furthermore, the miniaturization of the entire device has the advantage that it can be used satisfactorily for use in vehicles, etc.

In the above embodiment, only the case where the rewind lever is pushed in is illustrated, but the same effect can be obtained when the fast forward lever is pushed in, and in this case, manual release is performed using the rewind lever. Needless to say, it will happen.

[Effects of the Invention] As explained above, according to the song interval detection canceling mechanism of the present invention, the simple configuration using a lock plate having two rotation centers allows manual and electrical operations to be performed during song interval detection. Since it is possible to release two types of cancellations, it is possible to significantly reduce the number of parts, downsize the entire device, reduce costs, and provide an excellent tape recorder with high operability.

[Brief explanation of drawings]

1 to 5 are diagrams showing one embodiment of the inter-track detection canceling mechanism of a tape recorder according to the present invention, in which FIG. 1 is a plan view showing the whole, and FIGS.
The figures are plan views showing the operation of the main parts, respectively: Fig. 2 is the play state, Fig. 3 is the inter-song detection start state and return state, Fig. 4 is the inter-song detection state, and Fig. 5 is the inter-song detection. It is a figure which shows the state of manual release in the middle. 1...Fast forward lever, 2...Rewind lever, 9
...Suction plunger, 10...Suction piece, 11...
Lock plate, 12... Connecting portion, 13... Lock pin, 14... Guide elongated hole, 15... Fixed pin, 16-19... Spring, b... Lock portion, c... Projecting portion.

Claims (1)

[Scope of Claims] 1. By pressing one of the two levers for fast forwarding or rewinding and holding this lever with a suction plunger, the head plate can be moved between the head and the tape. In a tape recorder that detects a track interval on a tape by retracting the lever to a position, the fast forward or rewind lever is held on the plunger by a lock plate having two rotation centers, and one end of the lock plate has two rotation centers. The lock pin that locks the fast forward rewind lever is
A suction piece that is suctioned by the suction plunger is attached to the other end, and the connecting portion of the lock plate with the suction piece is the first rotation center, and on the other hand,
A guide elongated hole is provided approximately in the center of the lock plate, and the fixing pin inserted into this guide elongated hole serves as the second rotation center. The lock plate is rotated by being guided by a fixing pin through an elongated guide hole, and between the lock plate and the fixing pin, the lock plate is biased in the locking direction about the first rotation center. A first spring is attached to bring one of the guide elongated holes of the lock plate into contact with the fixing pin, and the lock plate is further biased by the first spring so that one of the guide elongated holes comes into contact with the fixing pin. In the state of contact, the lock plate rotates about the fixed pin, which is the second rotation center, and the lock plate is biased in the locking direction about the second rotation center. A song interval detection canceling mechanism for a tape recorder, characterized in that a second spring is provided for the purpose of canceling the song interval detection.