JPS62217448A - Cassette type recording and reproducing device - Google Patents

Abstract

PURPOSE:To detect the position of a cassette in a cassette holder and to prevent the cassette and a device from breaking by switching >=2 switches by a lever which is driven abutting on a cassette and rotates from its initial position against energizing force according to the angle of the rotation. CONSTITUTION:When the cassette 1 is inserted into the cassette holder 2 as shown by an arrow C, the cassette 1 strikes on the lever 9 at the end of the insertion to rotate the lever 9 slightly against a spring 7 as shown by an arrow D. At this time, the lever 9 switches an insertion decision switch 10, and the complete insertion of the cassette 11 into the cassette holder 2 is detected. Then, the cassette 1 is further pushed in to further rotate the lever 9 as shown by an arrow D, and a start decision switch 11 is switched to move the cassette holder 2 to a specific cassette loading position. In this case, the cassette holder 2 does not move unless the insertion decision switch 10 is switched, so the cassette and device are prevented from breaking.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is a cassette-type recording/reproducing device, and is an improvement in the position detection mechanism of a cassette (for example, a cassette that stores a magnetic tape, a magnetic disk, or an optical disk). It is related to.

[Conventional technology]

A conventional cassette type recording and reproducing device of this type is shown in Figs. 5 to 7.
The diagram will be explained. FIG. 5 is a plan view of the main part when the cassette is inserted, FIG. 6 is a plan view of the main part when the cassette is inserted and further pushed in, and Figure f47 is a plan view of the main part when the cassette is installed. In the figure, (1) is a cassette, (2) is a cassette holder that stores and holds the cassette (1), (3) is a guide pin fixed to the cassette holder (2), and (4) is a cassette holder.
) is a base plate having guide holes (not shown) on both sides for guiding the guide pin (3), (5) is a lever having an arc portion (5A), and (6) is the rotation center of the lever (5). The shaft is provided on the lower side of the upper surface of the base plate (4).

(7) is a return spring which urges the lever (5) to the position shown in Figure 's5, and is hung between the base plate (4) and the lever (5). (8) is the arc part (5A) of lever (5)
The start switch is located near the corner (5a).

Next, the operation will be explained. When the cassette (1) is inserted into the cassette holder (2), the cassette (1) comes into contact with the lever (5) as shown in Fig. 5, and the cassette (1) is moved when the start switch (8) is not switched. It is held within the cassette holder (2). Then, when inserting the cassette in the state shown in Fig. 5, apply a strong force to the arrow (
When the cassette (1) is manually pushed in the direction A), the cassette (1) rotates the lever (5) in the direction of the arrow (B), so that the start switch (8) is switched as shown in FIG. When this switching is detected, another drive source starts driving, the cassette holder (2) is moved, and the cassette (1) is moved to a predetermined cassette mounting position shown in FIG. Further, in this device, by pressing a performance start button (not shown), the drive source can be started without having to manually push the cassette (1).

[Problem that the invention seeks to solve]

In the conventional cassette-type recording/playback device as described above, there is only a start switch (8), so if the cassette (1) gets caught in the cassette holder (2) for some reason, for example, the cassette (1) may not fully reach its normal position. Even if the cassette (1) is held in the cassette holder (2) without being inserted, pressing the play start button will activate the drive source and move the cassette holder (2). There is a problem in that the cassette (1) interferes with other parts of the device, making it difficult to operate smoothly, and even causing damage to the cassette (1) and the device.

This invention was made to solve this problem, and by detecting the position of the cassette in the cassette holder, if the cassette is not completely inserted into the cassette holder, even if the cassette is pushed in, Another object of the present invention is to provide a cassette-type recording and reproducing device in which the drive by the drive source does not start even when a performance start button is pressed, and damage to the cassette and the device can be prevented.

[Means for solving problems]

The cassette type recording and reproducing device according to the present invention includes a lever that is biased to an initial position, contacts a cassette in a cassette holder, is driven, and rotates from the initial position against the biasing force, and rotation of the lever. It is equipped with two or more switches that switch depending on the angle.

[Effect]

In this invention, the position of the cassette in the cassette holder can be detected by switching two or more switches that are switched in accordance with the rotation angle of the lever that is in contact with the cassette and driven. It becomes possible to determine whether or not to start driving.

[Embodiments of the invention]

An embodiment of the present invention shown in FIGS. 1 to 4 will be described below. Figure 1 is a plan view of the main parts of the cassette insertion/g1 serving, Figure 2 is a side view of Figure 1, Figure 3 is a plan view of the main parts when the cassette is inserted, and Figure 4 is when the cassette is pushed further after insertion. 1 is a plan view of the main parts of the apparatus. In the figure, the same or corresponding parts as those of the above-mentioned conventional apparatus are given the same reference numerals, and the explanation thereof will be omitted.

In the figure, (9) is a lever having arcuate parts (9A) and (9B), which is biased to the initial position shown in FIGS. 1 and 2 by a return spring (7).

(10) is the corner (9a) of the arc part (9A) of the lever (9)
With the insertion judgment switch located nearby, the cassette (1)
is completely inserted into the cassette holder (2). (11) is a start judgment switch located a little away from the corner (9b) of the arcuate part (9B) of the lever (9), when the cassette (1) is completely inserted into the cassette holder (2). This is to determine whether or not it has been pushed in further.

Next, the operation will be explained. In Figures 1 and 2, when the cassette (1) is inserted into the cassette holder (2) in the direction of arrow (C), the cassette (1) collides with the lever (9) towards the end of its insertion, and the lever ( 9) is slightly rotated in the direction of arrow (D) against the biasing force of the return spring (7) and inserted into the cassette insertion position shown in FIG. At this time, the lever (9) switches the insertion determination switch (10) as shown in FIG. 3, so that it is detected that the cassette (1) is completely inserted into the cassette holder (2).

Then, when the cassette (1) is manually pushed in the direction of the arrow (C) in the cassette insertion state shown in Fig. 3 with a stronger force than when it was inserted, the cassette (1) moves the lever (9) to the direction of the arrow (DJ).
Since the force direction is further rotated, press the start judgment switch (
11) is switched as shown in FIG.

When this switching is detected, another drive source starts driving and moves the cassette holder (2) to a predetermined cassette mounting position.

In the above embodiment, even if the cassette (1) is pushed in even more forcefully without the insertion determination switch (10) being switched, the lever (9) will not rotate to the predetermined position and the start determination switch (11) will not be switched. The drive source is not driven. Furthermore, even if a performance start button (not shown) provided on the device is pressed, the drive source will not be driven unless the insertion determination switch (10) has been switched.

That is, unless the cassette (1) is completely inserted into the cassette holder (2), the cassette holder (2) will not move.

Further, in the above embodiment, two switches are provided, but for example, a final check switch for detecting the position of the cassette at the cassette mounting position may be added as a third switch, or a third switch may be added. You may add switches for different purposes as appropriate.

〔Effect of the invention〕

As explained above, this invention can detect the position of the cassette in the cassette holder, so if the cassette is not completely inserted into the cassette holder, the cassette will not be activated even if the cassette is pushed in or the play start button is pressed. This has the effect of preventing the cassette or the device from being damaged due to the power source not starting the drive.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 2 is a side view of FIG. 1, FIG. 3 is a plan view of the main part when the cassette is inserted, and FIG. The figure is a plan view of the main part when the cassette is pushed further after insertion, FIG. 5 is a plan view of the main part when the cassette is inserted in the conventional device, FIG. The figure is a plan view of the main parts when the cassette is installed. In the figure, (1) is a cassette, (2) is a cassette holder, (9) is a lever, (10) is an insertion judgment switch,
(11) is a start determination switch. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Patent Attorney Masuo Oiwa Figure 7

Claims (2)

[Claims] (1) In a cassette type recording and reproducing device having a cassette holder that stores a cassette and moves between a cassette insertion position and a cassette mounting position, the cassette is urged to an initial position and comes into contact with the cassette in the cassette holder; a lever that is driven and rotates from the initial position against the biasing force; and two or more switches that are switched according to the rotation angle of the lever, and each of the switches controls the cassette holder of the cassette. 1. A cassette-type recording and reproducing device characterized by detecting a position within the cassette. (2) There are two switches, one of which is an insertion judgment switch that determines whether the cassette is fully inserted into the cassette holder, and the other is a switch that determines whether the cassette is fully inserted into the cassette holder and is further pushed in. The cassette-type recording/reproducing apparatus according to claim 1, wherein the cassette-type recording/reproducing apparatus is a start determination switch for determining whether or not the start determination switch is activated.