JPH0467702B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a portable tape recorder that records data such as electrocardiographic waveforms using a cassette tape.

[Conventional Example] Conventionally, this type of portable tape recorder is generally required to have excellent portability, to be equipped with only a recording head, and to reliably record data over a long period of time (12 to 24 hours). In other words, it is necessary to maintain a more accurate recording state than conventional tape recorders used in other fields for recording conversations and music. For example, in the medical field, Holter recorders are used to record electrocardiographic waveforms on tape over a long period of time (12 to 24 hours) when carried by the examinee (patient), and then later played back by the doctor. In order to analyze data and provide appropriate diagnosis and therapy, it is particularly desirable to maintain optimal recording conditions at all times during recording.

[Problem that the invention seeks to solve]

Conventional portable tape recorders such as those described above do not have sufficient measures to meet the above-mentioned needs, and in particular, the cassette lid can be opened and closed at will even during recording. The problem is that recording is performed with the cassette lid not completely closed, or the cassette is accidentally touched or moved during recording, which often results in loss of reliability of the recorded data. It was hot.

This invention has been made to solve this problem, and provides a highly reliable recording lock for a tape recorder that can record while keeping the cassette lid in the locked state when the cassette lid is in the closed recording position. The purpose is to obtain equipment.

[Means for solving problems]

A recording lock device for a tape recorder according to the present invention slides and displaces an inclined end surface provided on an eject lever by a lock pin embedded in the cassette lid when the cassette lid is in the closed recording position. The rotation of the eject lever is controlled, and the lock pin is locked to a hook-shaped portion provided on the eject lever to prevent it from coming off.

[Effect]

In the recording lock device for a tape recorder of the present invention, when the cassette lid is in the recording position with the lid closed, the rotation of the eject lever is controlled by a lock pin embedded in the cassette lid;
This locking pin is locked to a hook-shaped part provided on the eject lever to prevent it from coming off, so the cassette lid is reliably closed and kept locked during recording, ensuring high reliability. Data can be recorded.

〔Example〕

1, 2, and 3a and 3b are partially sectional planes for explaining the operating principle mainly based on the mechanical block section in a recording lock device for a tape recorder which is an embodiment of the present invention, respectively. FIG. 3 is a partially sectional front view and a partial plan view for explaining an operating state. In each figure, 1 is a chassis that serves as a reference for attaching each part of the mechanical block section, and this chassis 1 includes a pedestal 1-1, a guide pin 1-2, and a cassette holder 1-3 for fixing the cassette 2 in position. It is provided on the front side. The slide plate 3 has a head 4 for recording data.
are arranged by mounting screws via each head support 4-1, 4-2 and azimuth adjustment spring 4-3,
Similarly, the tape guide 5 is connected to each guide column 5-1,
5-2 and a height adjustment spring 5-3 with mounting screws. On the other hand, pinch roller 6
is rotatable by a pinch roller arm 6-2 and a pinch roller shaft 6-3, with the pinch roller guide shaft 6-1 fixed to the slide plate 3 as the center of rotation, and the capstan is rotated by a pinch pressure biasing spring 6-4. It is attached so that it is kept pressed against the shaft 7. Embedded in the back side of the chassis 1 are slide plate guide shafts 8 and 9 for guiding the operation of the slide plate 3, as shown in FIG.
It is fitted into the elongated hole 3-1 made in the slide plate 3 shown in b, so that the slide plate 3 operates smoothly in the direction of arrow A or B, and the gap in the height direction is kept constant. A retaining ring (not shown) is fitted to the holder. However, since the slide plate guide shaft 8 also serves to guide the rotation of the eject lever 14 as will be described later, its axial length is longer than that of the slide plate guide shaft 9. Further, the eject spring 10 has its winding portion guided by the eject spring support column 11, one end of the arm portion is restricted by the side surface of the stopper 1-4 protruding from the chassis 1, and the other end is connected to the slide plate 3. It engages with the cut-and-raised portion 3-2, and constantly urges the slide plate 3 in the direction of arrow A by spring repulsive force. On the other hand, an L-shaped locking hole 3-3 is bored in the slide plate 3, and the engaging portion 12 of the lock lever 12 rotates around the lock lever support shaft 1-5 protruding from the rear surface of the chassis 1. -1 limits the operating position due to the urging force in the direction of arrow A. Further, since this lock lever 12 is always given a weak rotational force in the direction of arrow C by the lock lever biasing spring 12-2 (relative to the rotational force of the eject lever 14, which will be described later), the slide plate 3 is rotated in the direction of arrow B. When the lock lever 12 is fully pushed, the engaging portion 1 of the lock lever 12 is inserted into the expanded portion of the L-shaped locking hole 3-3.
2-1 enters and arrow A on slide plate 3
Preventing restoration in direction. This state is the recording (REC) state to be described later (positions of the pinch roller 6 and head 4 shown in Fig. 3a), and the cassette tape is pressed between the capstan shaft 7 and the pinch roller 6, and the head 4 is pressed against the tape surface. It is in a position where it comes into contact with. In addition, this position of the slide plate 3 keeps the power switch 13 fixed to the back of the chassis 1 in the ON state, so that all electric circuits are energized and data can be recorded and maintained. Here, since the principle of driving the tape is not directly related to the present invention, a detailed explanation thereof will be omitted.

Next, a stop operation for restoring the position of the slide plate 3, which maintains the recording state described above, to its original state position will be described. The eject lever 14, which is rotatably attached to an eject lever support shaft 1-6 protruding from the back surface of the chassis 1, has a protruding portion 14 at one end that abuts the engaging portion 12-1 of the lock lever 12. -1 is provided, and the other end is provided with a hook-shaped portion having an upwardly rising shape and consisting of an inclined end surface 14-2 and a recessed portion 14-3. Since the eject lever support shaft 1-6 passes through the slide plate 3, it goes without saying that long holes corresponding to the strokes in the directions of arrows A and B are bored on the slide plate 3 side. Nor. In addition, in order to limit the rotation of the eject lever 14, a long hole 14-4 that engages with the slide plate guide shaft 8 is bored, and the eject lever spring 14-5 counteracts the rotational force. given in a clockwise direction. The rotational force of the ejection lever 14 has enough strength to overcome the rotational force at the position of the protruding portion 14-1 compared to the engaging portion 12-1 of the locking lever 12, so that In order to maintain this, it is necessary to rotate the eject lever 14 clockwise by the required amount and retract it. This required amount is determined by the above-mentioned engaging portion 12-1 of the lock lever 12.
It can be easily understood from the explanation of the operation so far that it is sufficient to obtain the necessary amount to lock the L-shaped locking hole 3-3 in the expanded portion of the L-shaped locking hole 3-3 of the slide plate 3. In other words, the state of the recording position is
4 must be kept turned clockwise by the required amount, and in order to maintain that state,
A lock pin 19 embedded in the cassette lid 15, which will be described later, is brought into contact with the recess 14-3 of the eject lever 14, and when the lock pin 19 is in a state where there is no restriction (the cassette lid 15 is in an open state), The eject lever 14 is rotated counterclockwise by the eject lever spring 14-5, and the engaging portion 12-1 of the lock lever 12 is removed from the expanded portion of the L-shaped locking hole 3-3 of the slide plate 3. Therefore, the slide plate 3 is restored in the direction of arrow A by the urging force of the eject spring 10.
Due to this restoration of the slide plate 3, the power switch 13 is also turned off.

4 and 5 are a partially sectional right side view and a right side view, respectively, for explaining the operating state of a recording lock device for a tape recorder which is an embodiment of the invention of this application. In each figure, 15 is a cassette lid, and this cassette lid 1
A cassette hinge frame 15-1 with a hinge part is integrally formed inside the frame 5 (in this case, glued).
It is rotatably supported on both sides by a hinge pin 17-1 protruding from the hinge stay 17 at the hinge fulcrum. In addition, a cassette lid reversing spring 18 is provided on at least one of the inner surfaces of the cassette lid 15 so that the opening angle of the cassette lid 15 reaches the maximum opening angle state or the fully closed state by itself at a position other than the opening/closing neutral point. Spring shaft 15-2, 17-2
Therefore, when the cassette lid 15 is at its maximum opening angle, the arm portion of the cassette hinge frame 15-1 is in contact with the edge of the upper cabinet 16. Therefore, since the cassette lid 15 maintains a constant maximum opening angle state as described above, the cassette 2 can be easily installed (or removed), and the pedestal 1-1, guide pin 1-2, and The cassette presser foot 1-3 allows the cassette to be installed in the correct position. Since the cassette lid 15 is gradually closed from the maximum open angle state and moves to the fully closed state by itself after passing the opening/closing neutral point, the lock pin 19 protruding inward of the cassette hinge frame 15-1 also moves from position 19A to position 19B. , and the inclined end surface 14-2 of the eject lever 14 is slid and displaced from the position 14-2D to the direction of the position 14-2E. When the cassette lid 15 is fully closed, the lock pin 19 moves to the position 19C, so the hook-shaped portion with the inclined end surface 14-2 of the eject lever 14, which has been removed to the position 14-2F,
It is restored by the eject lever spring 14-5 and becomes in a state where the lock pin 19 is wrapped in the recess 14-3 (the state position shown in FIG. 4). When the cassette lid 15 is fully closed, the cassette 2 is pressed down by the cassette pressing spring 15-3 attached to the back side of the cassette lid 15, so that the pedestal 1-1, guide pin 1-2 and cassette retainer mentioned above are pressed down. 1-
Combined with the effect of 3, it is possible to wait for the state of the recording position to be fixed securely. Further, the position of the protruding portion 14-1 of the eject lever 14 is also rotated clockwise due to the presence of the lock pin 19, and the protruding portion 14-1 is moved from the position shown in FIG. 3b to the position shown in FIG. Avoiding to position a. Next, when the recording button 20 fixed to one end of the slide plate 3 is pushed in, the front cabinet 21
The slide plate 3 moves straight by the guide portion 21-1 and each slide plate guide shaft 8, 9,
The L-shaped locking hole 3-3 positions the engaging portion 12-1 of the lock lever 12 in its expanded portion. Therefore, as described above, the lock lever 12 immediately rotates in the direction of arrow C, and the engaging portion 12 of the lock lever 12
-1 is the kicking part 14 of the eject lever 14-
1 and can prevent the slide plate 3 from returning to its original state. Note that even if the slide plate 3 is further pushed in by the recording button 20, the elongated hole 3-1 comes into contact with each of the slide plate guide shafts 8 and 9, so that the slide plate 3 cannot be pushed any further in a straight line. As described above, even if you stop pressing the record button 20, the slide plate 3 cannot be reset, and the power switch 13 is also turned on.
At the same time, the pinch roller 6 and the head 4 described above are also maintained at the recording position, so the capstan shaft 7 rotates and enters the recording state. This recording lock state continues regardless of the tape recorder's posture, so it is possible to record for a long time while carrying the tape recorder. After recording is complete, remove the cassette tape from front cabinet 2.
The cassette lid 15 can be opened by hand by moving the eject knob 22 exposed through the window 21-2 provided on the side surface of the cassette lid 15 in the direction of arrow G. In other words, even if you try to open the cassette lid 15 once it is fully closed, the lock pin 19 cannot escape from the recess 14-3 forming the hook-shaped portion of the eject lever 14. The inclined end surface 14-2 is moved from the position 14-2E to the position 14-2F by the eject knob 22 that partially projects. This movement restriction is provided by slot 14-4. Therefore, the lock pin 19 is released from its restriction, and the cassette lid 15 can be opened as desired. On the other hand, since the lock pin 19 is not present in the recess 14-3 constituting the hook-shaped portion of the eject lever 14, when the eject lever 14 is released from the operation of the eject lever 22, the eject lever spring 14
-5 return force causes eject lever support shaft 1-
6 in the counterclockwise direction, and the engaging portion 12- of the lock lever 12 is rotated by the protruding portion 14-1.
1, the slide plate 3 whose return has been restricted returns to its original position (STOP) by the repulsive force of the eject spring 10 and the biasing force in the direction of arrow A as described above. The power switch 13 also moves as the position of the slide plate 3 moves.
Since the head 4, pinch roller 6, and tape guide 5 disposed on the slide plate 3 are also released from the cassette 2, all recording on the tape is completed and the cassette tape can be taken out.

In the above embodiment, the cassette lid 15 has a double structure, and the cassette hinge frame 1 is installed inside the cassette lid 15.
5-1 to provide a hinge function, and a lock pin 19 is embedded and fixed therein. For example, the cassette lid 15 is made of synthetic resin, and the cassette hinge frame 15-1 and lock pin 19 are integrated. It may also be configured, and in this case, it also contributes to reducing material costs.

Furthermore, in the above embodiment, the case where the application is applied to a tape recorder specialized for long-time recording has been explained, but it may also be applied to a general tape recorder or tape player with a playback function, and it can be used not only for recording but also for recording. It also has excellent stability during playback, and produces the same effects as the above embodiments.

〔Effect of the invention〕

As explained above, the present invention is a recording lock device for a tape recorder, in which the rotation of the eject lever is controlled by a lock pin embedded in the cassette lid when the cassette lid is in the closed recording position, and the lock pin is Since the cassette lid is locked to a hook-shaped part on the eject lever so that it cannot be removed, the cassette lid is securely closed and kept locked during recording, and even during long recording periods. This has the excellent effect of being able to record extremely reliable data.

[Brief explanation of the drawing]

1, 2, and 3a and 3b are partially sectional planes for explaining the operating principle mainly based on the mechanical block section in a recording lock device for a tape recorder which is an embodiment of the present invention, respectively. 4 and 5, respectively, show the operating state of a recording lock device of a tape recorder which is an embodiment of the present invention. FIG. 2 is a partially cross-sectional right side view and a right side view for explaining. In the figure, 1... Chassis, 1-1... Pedestal, 1
-2...Guide pin, 1-3...Cassette holder, 1-
4...Stopper, 1-5...Lock lever support shaft, 1-
6... Eject lever support shaft, 2... Cassette, 3...
Slide plate, 3-1...long hole, 3-2...cut and raised portion, 3-3...L-shaped locking hole, 4...head, 4-
1, 4-2...Head support, 4-3...Azimuth adjustment spring, 5...Tape guide, 5-2, 5-2...Guide support 5-3...Height adjustment spring, 6...Pinch roller, 6-1... Pinch roller guide shaft, 6-2...Pinch roller arm, 6-3...Pinch roller shaft, 6
-4...Pinch pressure biasing spring, 7...Capstan shaft,
8, 9... Slide plate guide shaft, 10... Eject spring, 11... Eject spring support column, 12... Lock lever, 12-1... Engaging portion,
12-2...Lock lever biasing spring, 13...Power switch, 14...Eject lever, 14-1...Kicked out portion, 14-2...Slanted end surface, 14-3...Concave portion, 14-4...Long hole, 14- 5... Eject lever spring, 15... Cassette lid, 15-1... Cassette hinge frame, 15-2... Spring shaft, 15-3... Cassette pressing spring, 16... Upper cabinet, 17... Hinge stay, 17-1... Hinge pin, 17-2...Spring shaft, 18...Cassette lid reversing spring, 19...Lock pin, 20
...Record button, 21...Front cabinet, 2
1-1...Guide part, 21-2...Window part, 22...Eject knob. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1 In a tape recorder that records data on a cassette tape, a recording head 4, a pinch roller 6
A slide plate 3 is provided with a tape guide 5, etc., and the slide plate 3 is engaged with a locking hole 3-3 provided in the slide plate 3 to prevent the slide plate 3 from returning from the recording position to the stop position. A lock lever 12 for blocking and a support shaft 1-6 protruding from the chassis 1 are rotatable, and one end is provided with a protrusion 14-1 that abuts the lock lever 12 and rotates it. At the other end, there is an eject lever 14 which is shaped upwardly and has a hook-shaped part consisting of an inclined end face 14-2 and a recessed part 14-3, and a lock pin 19 embedded in the cassette lid 15. When the cassette lid 15 is in the closed recording position, the lock pin 1
9, the inclined end surface 1 of the eject lever 14 is
By slidingly displacing 4-2, this eject lever 1
4. A recording lock device for a tape recorder, characterized in that the lock pin 19 is locked to a hook-shaped portion of the eject lever 14 to prevent it from coming off.