JPH0562312A - Cassette detector for cassette loading device - Google Patents

Abstract

PURPOSE:To provide a cassette detection mechanism discriminating the state of cassette required for the control of a cassette loading device including an illegal loading of cassette, with the use of three detectors. CONSTITUTION:The device is constituted in such a manner that the detectors 1, 2, 3 are arranged while shifting the positions in the feeding direction of cassette 8 loading and that five kinds of state such as the state of no cassette being inserted, cassette inserted state, the state under the cassette loading operation, the state of cassette loading completed, and the state of cassette obliquely loaded, are discriminated in accordance with outputs of the detectors 1, 2, 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette detecting device in a cassette mounting device.

[0002]

2. Description of the Related Art A device for pushing a cassette into a cassette insertion port provided on the front surface of a device using a cassette and pulling the cassette into the device is used in many devices such as a VCR.

In these devices, four detectors 4, 5 are arranged as shown in FIG. 2 (a) in order to control the mounting operation of the cassette and prevent the oblique mounting of the cassette.
6 and 7 are used to determine the position states of the following five types of cassettes in accordance with the outputs of the four detectors 4, 5, 6, and 7 as shown in FIG. 2 (b). There is. That is, (1) When no detectors 4, 5, 6, 7 detect the cassette, the cassette is not inserted.
(2) A cassette is inserted when the detectors 6 and 7 do not detect the cassette and the detectors 4 or 5 or both 4 and 5 detect the cassette. (3)
A state in which the cassette is in the loading operation when the detectors 4 and 5 detect the cassette and the detectors 6 and 7 do not detect the cassette. (4) A state in which the mounting of the cassette is completed when the detectors 4 and 5 do not detect the cassette and the detectors 6 and 7 detect the cassette. (5) Detector 4,
When the cassette 6 detects the cassette and the detectors 5 and 7 do not detect the cassette, or when the detectors 5 and 7 detect the cassette and the detectors 4 and 6 do not detect the cassette, the cassette is obliquely mounted. It is the state of.

[0004]

DISCLOSURE OF THE INVENTION Discrimination of five types of position states of a cassette in the above-mentioned conventional cassette mounting apparatus is as follows.
This was done using 4 detectors.

It is an object of the present invention to provide a cassette detecting device of a compact cassette mounting device with a reduced number of detectors.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention arranges three detectors with their positions offset in the cassette feed direction, and one of the detectors is provided in the area of a cassette mounting device. It has a configuration arranged outside.

[0007]

According to the present invention, the cassette position can be detected by the above-mentioned configuration with three detectors, which are smaller in number than the conventional ones.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. As shown in FIG. 1A, the cassette 8
Let L be the length in the feeding direction of the cassette 8 '
If the lengths from the position at the back of the detector to the detector 1 and the detector 2 are l1 and l2, respectively, l2 <l2 <
The detectors 1 and 2 are arranged so as to be displaced in the cassette feeding direction so as to satisfy the condition of L <l1.

As shown in FIG. 1 (a), the detector 3 is arranged at a position where the detector 2 is displaced in the cassette feeding direction to a deep position when the cassette is mounted.

As shown in FIG. 1B, detectors 1, 2, 3
The following five types of cassettes determine the position states of the cassettes according to the output of the above. That is, (1) detectors 1, 2,
When 3 is not detecting the cassette, the state that the cassette is not inserted. (2) Detector 1 or 2, or 1
The state where the cassette is inserted when both of the cases 1 and 2 detect the cassette and the detector 3 does not detect the cassette.
(3) The detectors 1 and 2 detect the cassette, and the detector 3
When the cassette is not being detected, the cassette loading operation is in progress. (4) A state in which mounting of the cassette is completed when the detector 1 does not detect the cassette and the detectors 2 and 3 detect the cassette. (5) When the detectors 1, 2 and 3 detect the cassette, or when the detector 2 detects the cassette and the detectors 1 and 3 do not detect the cassette, the cassette is obliquely mounted. ..

As described above, according to the cassette detecting device of the cassette mounting device of the embodiment of the present invention, the three detectors are arranged to be displaced in the cassette feeding direction, so that the cassette mounting device can be controlled. It is possible to detect the status of various cassettes.

[0012]

As is apparent from the above embodiments, according to the present invention, the three detectors are arranged so as to be displaced in the cassette feeding direction, so that the state of the cassette necessary for controlling the cassette mounting device is controlled. It is possible to provide the cassette detection device of the cassette mounting device that can determine

[Brief description of drawings]

1A is a schematic diagram illustrating a cassette detection device of a cassette mounting device according to an embodiment of the present invention, and FIG. 1B is a correspondence diagram of the output of the detector and the state of the cassette of FIG. 1A.

2A is a schematic diagram of a cassette detection device of a conventional cassette mounting device, and FIG. 2B is a correspondence diagram of the output of the detector of FIG. 2A and the state of the cassette.

[Explanation of symbols]

 1 detector 2 detector 3 detector

Claims (2)

[Claims] 1. A cassette detection device for a cassette mounting device, wherein three detectors are arranged at different positions in the cassette feeding direction. 2. The cassette detecting device for a cassette mounting device according to claim 1, wherein one of the three detectors is arranged outside the area of the cassette mounting completion position.