Apparatus lid opening detecting device and detecting method

Abstract

This invention relates to machine cover open detecting device and the detecting method. It belongs to mechanical switch and electronic circuit field. Turn on and off salient point, mechanical switch and contact follow the cover open and close are set on the detecting device. The contact is connected to signal detecting storage circuit, initial state input and cover detecting output circuit are set in the storage circuit. The cover is determined whether it has been opened through output mouth level high and low. Computer storage information in the detecting device doesn't allow to be opened; it can be abstract by special using device. Device safe using and investigating after the cover is opened is easier. The circuit structure of the device is simple, cost is low. The device can be power supplied by secondary battery or external power supply, the battery is on charging state when external supply is used, so the battery using life is greatly prolonged, and the trouble of incessant changing battery is avoided. Battery low voltage comparison circuit is set to alarm low battery, and provide great convenience to consumer. It can be used to device detecting of tax control cashing machine and device familiar.

Description

(1) Technical field:

[0001] The invention is a machine cover opening detection device and a detection method, in particular for the detection of the machine cover opening of a tax-controlled cash register and similar equipment in use. It belongs to the electric switch category (H01H) and the measurement electric variable category (G01R). (two) background technology:

[0002] The existing lid opening and closing detection methods generally have the following types: ①Purely mechanical methods. ② Photoelectric detection method. ③ Electromagnetic detection method. ④Mechanical switch plus electronic detection method. Each method has its own characteristics and deficiencies. Generally, it is necessary to choose a suitable method according to the purpose of the function to be achieved by the tested equipment.

[0003] A tax-controlled cash register or similar equipment that has been disclosed or is being developed operates in the following way: the cash register inputs data thr...

Examples

Embodiment Construction

[0019] As shown in Figure 3, when the machine cover 6.2 of the detected device 6 is closed, the columnar protruding point 6.1 fixed under the cover presses on the top of the pressing key 3.2 of the light touch key 3.1, so that the pressing key moves down and is pushed and fixed on the pressing key The two sliding pieces 3.3 are downwards (the sliding pieces are embedded on the pressing key), so that the two sliding pieces are separated from the upper two contacts E and F respectively, so that the contact C and the normally closed contact A are connected, and the contact D is connected to the normally closed The contact B is connected; at this time, the spring 3.4 between the pressing key and the bottom plate of the light touch key is compressed. As shown in Figure 4, when the machine cover of the tested device 6 is opened, the protruding point 6.1 is separated from the pressing key 3.2, and the compressed spring 3.4 generates stretching force, which pushes the pressing key to m...

(1) Technical field:

[0001] The invention is a machine cover opening detection device and a detection method, in particular for the detection of the machine cover opening of a tax-controlled cash register and similar equipment in use. It belongs to the electric switch category (H01H) and the measurement electric variable category (G01R). (two) background technology:

[0002] The existing lid opening and closing detection methods generally have the following types: ①Purely mechanical methods. ② Photoelectric detection method. ③ Electromagnetic detection method. ④Mechanical switch plus electronic detection method. Each method has its own characteristics and deficiencies. Generally, it is necessary to choose a suitable method according to the purpose of the function to be achieved by the tested equipment.

[0003] A tax-controlled cash register or similar equipment that has been disclosed or is being developed operates in the following way: the cash register inputs data thr...

Examples

Embodiment Construction

[0019] As shown in Figure 3, when the machine cover 6.2 of the detected device 6 is closed, the columnar protruding point 6.1 fixed under the cover presses on the top of the pressing key 3.2 of the light touch key 3.1, so that the pressing key moves down and is pushed and fixed on the pressing key The two sliding pieces 3.3 are downwards (the sliding pieces are embedded on the pressing key), so that the two sliding pieces are separated from the upper two contacts E and F respectively, so that the contact C and the normally closed contact A are connected, and the contact D is connected to the normally closed The contact B is connected; at this time, the spring 3.4 between the pressing key and the bottom plate of the light touch key is compressed. As shown in Figure 4, when the machine cover of the tested device 6 is opened, the protruding point 6.1 is separated from the pressing key 3.2, and the compressed spring 3.4 generates stretching force, which pushes the pressing key to m...

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