JPS61160867A - Detecting mechanism for cassette position - Google Patents

Abstract

PURPOSE:To make a cassette position detecting mechanism small in size by providing a detecting metallic parts to a cassette holder and a detecting means for said detecting metallic tape to the inner side wall of a loading mechanism respectively and detecitng the vertical and horizontal positions of the cassette holder by one of the detecting means. CONSTITUTION:A cassette position detecting mechanism contains a projected detecting metallic parts 8 attached at the tip of a cassette holder 2. Then a detecting means 9 for the parts 8 is set on an inner side wall 10 at the left end position of the loading mechanism 1. The mechanism 1 contains the holder 2 hanged by a rail 3, and a cassette 4 is put into the holder 2 from the direction of an arrow head A in a state I shown in the figure. Then the holder 2 moves horizontally up to a state II. Here it is detected that the parts 8 is set at the left end position. Then the horizontal shift of the cassette 4 is stopped and the cassette 4 is moved vertically in a state III. When the cassette 4 is shifted to the state II from the state III, the vertical shift of the cassette 4 is stopped to set the cassette in the state I after detecting that the parts 8 is set at the upper limit position. Thus the cassette 4 is moved horizontally. In such a way, the miniaturization is possible with the cassette position detecting mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cassette type magnetic tape device having a cassette loading mechanism, and a set position detection mechanism for the loading.

A magnetic tape device is a device that records/reproduces information on a magnetic tape based on instructions from a computer or the like.

The magnetic tape wound on a reel is mounted on a magnetic tape device, and reciprocated between the two reels, during which time it comes into contact with a magnetic head to read/write information.

Recently, magnetic tape and two reels have been made into cassettes,
A cassette is inserted into the loading mechanism of a magnetic tape device and sent to a recording/reproducing section, where the magnetic tape is read/written, and when finished, returned to its original insertion position by the loading mechanism.

When a cassette inserted into a loading mechanism of a magnetic tape device is transported to a recording/reproducing section, the cassette is usually moved horizontally and vertically and is loaded into a boss.

Therefore, in order to accurately attach the reel to the reel boss, it is necessary to detect the position of the cassette in the horizontal direction and in the vertical direction. Since the mechanism for detecting the cassette position in two directions is generally a complicated mechanism, a simple detection mechanism is desired.

[Conventional technology]

FIG. 2 shows a front view for explaining the cassette position detection mechanism of a conventional loading mechanism. is inserted into the cassette holder 2 from the direction of arrow A. After insertion, the cassette holder 2 moves sideways to the position marked ■. At this time, it is detected by the sensor 5 attached to the cassette holder that it is confirmed that the left limit is reached, the horizontal movement is stopped, and the vertical movement is performed, resulting in the state shown in (3). At this time, use a stopper (not shown)
The cassette holder 2 is stopped, and the presence of the cassette 2 in the reel boss 7 is confirmed by a sensor (not shown) located near the reel boss 7 of the recording/reproducing section.

This time, conversely, when moving from state ■ to state ■, the rail position is detected by the sensor 6 that detects the upper limit of rail 3, it is confirmed that it is at the upper limit, vertical movement is stopped, and then horizontal movement is stopped. This is done, resulting in the state shown in ■.

As described above, separate sensors are used to detect the cassette position in the horizontal and vertical directions.

Another method is a mechanism that detects the stop position based on changes in motor load without using a sensor. This requires torque to hit the stopper and stop the motor.
Therefore, this method utilizes the fact that a large amount of current flows, and detects the driving state and the stopping state S based on the current difference, as shown in FIG.

[Problem that the invention seeks to solve]

In the conventional cassette position detection mechanism shown in FIG. 2, the position of the sensor 5 moves as the rail 3 moves up and down.
It was not possible to detect the rail 3 in the vertical direction, so a sensor 6 was provided to detect the vertical position. Therefore, there is a problem that two sensors and two circuits are also required.

The latter mechanism detects changes in motor load,
There are problems in that a large load is placed on the motor, the life of the motor is shortened, and the control circuit becomes complicated.

[Means for solving problems]

The above problem is solved by providing a detection fitting on the cassette holder of a magnetic tape device, and a detection means for detecting the detection fitting on the inner side wall of the loading mechanism that does not operate due to the vertical movement of the rail, and using only the detection means to detect the cassette. This problem is solved by the cassette position detection mechanism of the present invention, which is configured to enable vertical and horizontal position detection of the holder.

[Effect]

That is, a detection metal fitting is attached to the tip of the cassette holder, and a sensor for detecting the detection metal fitting is installed on the inner side wall at the left limit position of the loading mechanism, so that the cassette holder with the cassette inserted changes from the state of ■ to the state of ■. When the detection fitting attached to the cassette holder is detected by the detection means (sensor), the left limit is confirmed, horizontal movement is stopped, and vertical movement is performed, resulting in the state shown in (3).

This time, when moving from state ■ to state ■, the detection metal fitting is detected by the sensor, confirming that it is at the upper limit, stopping vertical movement, and performing horizontal movement, resulting in state I. , left limit, and upper limit can be detected with one sensor.

〔Example〕

Hereinafter, the gist of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a front view illustrating an embodiment of the present invention. Note that the same reference numerals throughout the figures indicate the same objects.

In the cassette position detection mechanism shown in FIG. 1, a protruding detection metal fitting 8 is attached to the tip of the cassette holder 2, and a means (sensor) 9 for detecting the detection metal fitting 8 is attached to an inner side wall box at the leftmost position of the loading mechanism. establish.

The loading mechanism 1 is constructed in the same manner as the conventional loading mechanism shown in FIG.
Cassette 4 is suspended in the state shown in the figure.
is inserted into the cassette holder 2 from the direction of arrow A. After insertion, the cassette holder 2 moves sideways to the position marked ■.

At this time, the detection fitting 8 installed at the tip of the force separator holder 2 is detected by the sensor 9 installed on the inner side wall, and it is confirmed that the left limit is reached, the horizontal movement is stopped, and the vertical movement is performed. state. When stopping in state (2), the cassette holder 2 is stopped by a stopper (not shown), and a sensor (not shown) located near the reel boss 7 of the recording/reproducing section confirms that the cassette 4 has entered the reel boss 7. .

This time, conversely, when moving from the state of ■ to the state of ■, the detection fitting 8 provided at the tip of the cassette holder 2 is
By detecting this, it is confirmed that the upper limit has been reached, vertical movement is stopped, and horizontal movement is performed, resulting in the state of ■.

As described above, with the configuration in which the left and upper limits of the cassette holder 2 are detected by one sensor 9, the cassette position can be detected by - number of sensors instead of the conventional two sensors. It is possible to downsize the device and simplify the control circuit.

〔Effect of the invention〕

As explained above, according to the present invention, the mechanism can be downsized and the control circuit can be simplified by using a mechanism that can detect the horizontal and vertical positions of the cassette with one sensor.

[Brief explanation of drawings]

FIG. 1 is a front view illustrating an embodiment of the present invention, FIG. 2 is a front view illustrating a conventional cassette position detection mechanism of a loading mechanism, and FIG. 3 is a diagram illustrating conventional detection based on motor load fluctuations. It is. In the figure, ■ is a loading mechanism, 2 is a cassette holder, 3 is a rail, 4 is a cassette holder, 7 is a reel boss, 8 is a detection fitting, 9 is a detection means,

Claims (1)

[Claims] In a cassette position detection mechanism of a loading device of a type in which a cassette is inserted into a cassette holder of a magnetic tape device using a cassette-type magnetic tape having two reels, a detection fitting is attached to the cassette holder, and the detection fitting is detected. A cassette position detection mechanism characterized in that detection means are provided on the inner side walls of the loading mechanism, and the detection means is configured such that the position of the cassette holder in the vertical and horizontal directions can be detected with just one detection means.