JPH0697523B2 - Magnetic recording / reproducing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a magnetic recording / reproducing apparatus suitable for miniaturization.

Conventional configuration and its problems Conventionally, as a magnetic recording / reproducing apparatus, it is known that a cassette tape magazine is mounted and the head substrate is moved at the same time so that operation in each mode can be performed. Its configuration was complicated. In particular, the magnetic head is always in the playback (or recording) mode position when the cassette tape magazine is mounted, and the magnetic head can be moved to a position away from the pad in the cassette tape magazine when converting to the fast forward or fast rewind mode. Therefore, the number of parts, the cost, etc. have been increasing.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a magnetic recording / reproducing apparatus capable of realizing not only the reproduction (or recording) mode but also the basic modes of fast-forward and fast-reverse with a small number of parts.

To achieve the above object, in the magnetic recording / reproducing apparatus of the present invention, a cassette sensor for detecting the presence or absence of a cassette tape magazine is provided in a standby spring member having a control cam portion that engages with a head substrate. The present invention is characterized in that the cassette sensor pin is configured to release the engagement state between the control cam portion and the head substrate according to the mounting of the cassette tape magazine. According to this structure, when the cassette tape magazine is mounted, the control cam portion of the standby spring member and the head substrate are disengaged from each other, and the pinch roller means provided on the head substrate is pressed against the capstan shaft. The head substrate can be moved so as to be held at a second position which is intermediate between the first position and the first position allowing the mounting of the cassette tape magazine, and the head having the pinch roller means and the magnetic head from the second position. Since the basic modes of reproduction (or recording) and fast-forward / rewind can be realized by controlling the stroke of the substrate, there is an advantage that the number of parts for realizing these basic modes can be reduced.

Description of Embodiments FIGS. 1 to 3 show an embodiment of a magnetic recording / reproducing apparatus of the present invention. 1 to 3, a cassette sensor pin 2 for detecting the presence or absence of a cassette tape magazine is planted in a standby spring 3 having a control cam portion 3a. It is fastened to the substrate 6 (hereinafter referred to as PS). here,
The control cam portion 3a and the long hole portion 5a of the head substrate 5 are engaged and held, and the pinch roller means provided on the head substrate 5 holds the first state in which mounting of the cassette tape magazine is allowed. . The cassette sensor pin 2 penetrates the main substrate 4, the head substrate 5 and the decorative plate 7 and is projected. The head substrate 5 is biased in the direction of arrow A in the figure by a spring 20 that is installed between the head substrate 5 and the main substrate 4. The head substrate 5 is connected to a sub head substrate 15 which can move forward and backward with respect to the cassette tape magazine, and the sub head substrate 15 is provided with a pinch roller arm 8 so as to be rotatable about a shaft 14. There is. Further, a rotatable pinch roller 9 is provided at the tip of the pinch roller arm 8. A pinch spring 21 is provided between the pinch roller arm 8 and the sub head substrate 15 to apply a biasing force to bring the pinch roller 9 into contact with the capstan shaft 10 at a predetermined pressure.
Is provided. A magnetic head 12 is provided on the sub head substrate 15. The head shift lever 16 rotatably supported on the main board 4 is the sub head board 15 described above.
And is urged in the direction opposite to the arrow A in the drawing by a spring (not shown). In the figure, 11 is a stop lever, 13 is a play lever, 17 is a reference axis,
18 is a take-up reel and 19 is a supply reel.

In such a configuration, normally, the pinch roller and the magnetic head 12 are in the first position which allows the mounting of the cassette tape magazine 1 and are held in that state. That is, in this first state, the control cam portion 3a provided on the standby spring 3 penetrates the main board 4 and engages with the elongated hole 5a of the head board 5, and the head board based on the urging force of the spring 20. 5 and the sub head substrate 15 are prevented from moving in the direction of arrow A in the drawing.

When the tape cassette magazine 1 is mounted in the first state, the cassette sensor pin 2 and the cassette tape magazine 1 come into contact with each other as shown in FIG. The engagement state with 5a is released, and the spring-biased head substrate 5 moves in the direction of arrow A in the figure, and shifts to the second state. At this time, the upper end surface portion of the control cam portion 3a and the head substrate 5 contact each other, whereby the standby spring 3 bends, and the contact between the cassette sensor pin 2 and the cassette tape magazine 1 is released. Therefore, the cassette tape magazine 1 is prevented from floating by the cassette sensor pin 2 in the second state. In this second state, the head substrate 5 is moved in the direction of arrow A in the figure by the urging force of the spring 20.
Since the sub head substrate 15 connected to the head substrate 5 is connected to the head shift lever 16 which is biased in the direction opposite to the arrow A in the figure, and receives the biasing force in the direction opposite to the moving direction of the head substrate 5. The pinch roller 9 at the tip of the pinch roller arm 8 provided on the sub head substrate 15 does not contact the capstan shaft 10 with a predetermined pressure, and the magnetic head 12 provided on the sub head substrate 15 is the cassette tape magazine 1 The pad pressure therein does not abut the magnetic tape as it acts. Therefore, the second state can be automatically realized by mounting the cassette tape magazine. In this second state, when the play lever 13 is pressed, the head shift lever 16 rotates against the urging force thereof, and the sub head substrate 15 is forcibly forced in the direction of arrow A in the figure. Can be moved. Therefore, the magnetic head 12 is brought into contact with the magnetic tape at a predetermined pressure in cooperation with the pad in the cassette tape magazine, and the pinch roller 9 is held at the third position in which the pinch spring 21 is brought into contact with the capstan shaft at a predetermined pressure. Will come

Next, when detaching the cassette magazine 1, first, the head substrate 5 is forcibly moved to the first state,
By taking out the cassette tape magazine 1 in this state, the control cam portion 3a of the standby spring 3 and the long hole portion 5a of the head substrate 5 are brought into an engaged state, and the first state can be restored.

As described above, according to the present invention, there is provided pinch roller means for bringing the magnetic tape in the cassette tape magazine into contact with the capstan shaft at a predetermined pressure so that the magnetic tape can be moved to the cassette tape magazine side. A standby spring provided with a spring-biased head substrate, a control cam portion that engages with the head substrate, and a cassette sensor pin that detects the presence or absence of the cassette tape magazine is provided. The cassette sensor pin releases the engagement holding state between the control cam portion provided on the standby spring and the head substrate to move the head substrate, and the pinch roller means allows mounting of the cassette tape magazine. It is located at a second position which is intermediate between the first position and the third position which is pressed against the capstan shaft. With this configuration, it is sufficient to move the head from the second position so as to realize the basic modes of reproduction (or recording), fast forward, and rewind, and to realize those basic modes with a small number of parts. Yes, this second
At the position, the contact between the cassette sensor pin and the cassette tape magazine is released by the control cam portion and the head substrate, and the cassette sensor pin can be prevented from floating.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention, FIG. 1 is a plan view in a first state, FIG. 2 is a plan view of a main portion thereof,
FIG. 3 is a sectional view of the main part, FIG. 4 is a plan view in the second state, FIG. 5 is a sectional view of the main part, and FIG. 6 is a plan view in the reproduction mode. 1 ... Cassette tape magazine, 2 ... Cassette sensor pin, 3 ... Standby spring, 3a ... Control cam part, 5
...... Head substrate, 6 …… PS substrate, 8 …… Pinch roller arm, 9 …… Pinch roller, 10 …… Capstan shaft, 12
...... Magnetic head, 14 ...... Pinch roller arm shaft, 15 ……
Sub head board, 16 …… Head shift lever.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuyuki Yaburo 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) Reference JP-A-54-119906 (JP, A) JP-A-51-118404 (JP, A)

Claims (1)

[Claims] 1. A head substrate having pinch roller means for bringing a magnetic tape in a cassette tape magazine into contact with a capstan shaft at a predetermined pressure so as to be movable toward the cassette tape magazine side. And a standby spring member provided with a control cam portion that engages with the head substrate and a cassette sensor pin that detects the presence or absence of the cassette tape magazine. According to the mounting of the cassette tape magazine, A first position where the engagement state between the control cam portion provided on the standby spring member and the head substrate is released to advance the head substrate, and the pinch roller means allows the cassette tape magazine to be loaded and unloaded. And the pinch roller means at a second position intermediate between the third position where the pinch roller means is pressed against the capstan shaft. The standby spring member is bent when the control cam portion comes into contact with the lower surface of the head substrate at the time of shifting to the second position, and the contact between the cassette sensor pin and the cassette tape magazine is released. Characteristic magnetic recording / reproducing device.