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Paper size sensing device

A technology for sensing device and paper size, applied in electrography, optics, instruments, etc., can solve the problems of high price of variable resistor 43 and unconformity with economical considerations, and achieve the effect of saving space and manufacturing cost

Inactive Publication Date: 2013-01-23
PRIMAX ELECTRONICS LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the price of variable resistor 43 is on the high side, which does not meet economic considerations

Method used

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Examples

Experimental program
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Embodiment Construction

[0057] see Figure 4 , which is a structural schematic diagram of a preferred embodiment of the paper size sensing device of the present invention. The paper size sensing device 2 is applied to a paper feeding tray 3 of a paper feeding device, and includes an adjustment module 21, a sensing module 22 and a control unit 23 (such as Figure 7shown), wherein the adjustment module 21 includes a first paper guide part 211 arranged at one end of the adjustment module 21, a second paper guide part 212 arranged at the other end of the adjustment module 21, an adjustment part 213 having a tooth structure 2131 And the circular gear 214, the tooth structure 2131 includes the first rack 21311 connected to the first paper guide part 211 and the second rack 21312 connected to the second paper guide part 212, and the first rack 21311 and the second rack 21311 The racks 21312 are parallel, and the circular gear 214 is disposed between the first rack 21311 and the second rack 21312 and meshes...

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Abstract

The invention belongs to a paper size sensing device comprising an adjusting module, a sensing module and a control unit. The adjusting module comprises a first paper-guiding part, a second paper-guiding part, an adjusting part and a round gear, wherein the adjusting part moves so that the first paper-guiding part and the second paper-guiding part respectively abut on the two parallel side edges of a piece of paper and drive the round gear to rotate; and the sensing module comprises a contact element and a circuit board, wherein the contact element is connected to the lower side of the round gear and can contact with different sensing regions on the circuit board according to different rotation quantity of the round gear so that the control unit can receive different sensing signals and acquire the distance between two parallel side edges of the paper. The paper size sensing device provided by the invention saves more use space and manufacture cost.

Description

technical field [0001] The invention relates to a paper size sensing device, in particular to a paper size sensing device applied to a paper feeding device. Background technique [0002] Since the automatic paper feeding device is becoming more and more sophisticated nowadays, it has been widely used in printers, copiers and business machines. The main purpose is to automatically feed most documents into these machines to save manpower consumption. Generally speaking, the paper feeding device has a paper size detection mechanism, and the paper feeding device detects the size of the document before feeding the document, so as to facilitate the operation of these machines. For example, blank papers of various sizes (A3, A4, A5, B4, B5, etc.) It will detect the size of the document to be copied in advance, and send the detection signal to the copier, so that the copier will automatically provide A4 size blank paper for copying. [0003] Please also refer to figure 1 and fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/00
Inventor 郭秉宏
Owner PRIMAX ELECTRONICS LTD
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