Opening-closing device of manuscript pressing plate and office machine

Abstract

The invention provides an opening-closing device of a manuscript pressing plate, when the manuscript pressing plate is opened from the closed state of the manuscript pressing plate, and closed from the opened state of the manuscript pressing plate, the manuscript pressing plate is made to smoothly ascend and descend at a horizontal state. The opening-closing device of a manuscript pressing plate is formed by an opening-closing mechanism of the manuscript pressing plate and a lifting mechanism, the manuscript pressing plate is assembled on an assembling assembly of an office machine body. The opening-closing device works as a construction of opening and closing the manuscript pressing plate; the lifting mechanism makes the manuscript pressing plate lifted, opened and closed at the horizontal state; an elastic device relative to the cross direction of an upper arm assembly is configured, and via a motion selection device, when the ascending state of the manuscript pressing plate at the horizontal state completes, the opening-closing device operates, and when the closing motion ends, the lifting mechanism makes the manuscript pressing plate descend at the horizontal state.

Description

technical field [0001] The invention relates to an opening and closing device for assembling an original pressing plate of an office machine relative to a machine body, and is suitable for an opening and closing device for an original pressing plate with a lifting function, and an office machine with the original pressing plate opening and closing device. Among them, the original press plate is an original press plate of office machines such as copiers, printing machines, or list machines, or an original press plate of office machines such as so-called multifunction machines that have various functions such as list machines, facsimile machines, and scanners in addition to photocopying functions. , or an original press plate with an ADF device (automatic document feeder) (in the present invention, these are all referred to as an original press plate). Background technique [0002] At present, most of the original press plates of office machines sold on the market are as descr...

AI Technical Summary

Problems solved by technology

[0009] The above-mentioned Patent Documents 1 and 2 respectively describe the document press plate opening and closing device. When, for example, a thin document is placed on the contact glass of the scanning unit and the document press plate is closed, the wind flows obliquely from the rear of the contact glass to the front. Therefore, there is a problem that the loading position of the original is easily shifted by the flow of wind.

Therefore, the document pressing plate is slowly closed so that the position of the original document does not deviate, or the original document pressing plate must be closed while pressing the upper side of the original document with the hand, therefore, it takes time and time in the photocopying operation. The problem of easy pinching

[0010] Furthermore, the structure of the known document presser plate opening and closing device described in Patent Document 1 has a large load on the thick document, which may cause deviation of the printing position, or cause damage to the thick document, or cause damage to the contact glass of the scanning part. problems such as overload

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