CN2254403Y

CN2254403Y - Positioning optical grating for typing head of microprinter

Info

Publication number: CN2254403Y
Application number: CN 96232467
Authority: CN
Inventors: 王贤福; 周宏囿; 郑志雄
Original assignee: XINDALU COMPUTER CO Ltd FUJIAN
Current assignee: XINDALU COMPUTER CO Ltd FUJIAN
Priority date: 1996-08-01
Filing date: 1996-08-01
Publication date: 1997-05-21
Anticipated expiration: 2006-08-01

Abstract

The utility model relates to a positioning optical grating for a printing head of a micro printer. The utility model is characterized in that the interior of the printing head with the positioning optical grating is provided with a plurality of optical grating bars with equal distances. Both ends of the positioning grating are provided with installation fixing positions. When the utility model is installed, only both ends of the positioning grating are respectively fixedly installed on a right and a left reset metal plates inside a reset optical coupler under the printing head. Under the condition that an original structure is not changed, the utility model overcomes the defects that because the moving errors of the printing head of the printer, the density of dot matrixes of printed characters is uniform and uneven.

Description

The location grating of mini-printer printhead

The utility model belongs to the computer outside plant, relates to a kind of location grating of mini-printer printhead specifically.

Existing mini-printer is simple and compact for structure, and volume is little, and is easy to operate, is a kind of instrument that uses the wider printing Chinese and western language character of face.But this class printer is when printing the Chinese and western language character, because printhead is subjected to displacement motor, main passive roller gear, guide rail, factors such as the precision of mechanism components such as tooth-shaped conveying belt and inertia and produce offset deviation, can't accurately locate, the print pulse that main frame can not be sent here is exported accurately, the distance of position pulse that shows output is irregular, neglect wide narrowly suddenly, make the character that prints, particularly chinese character the serious first half and Lower Half misalignment can occur, the phenomenon of the stroke plucked of character, as shown in Figure 1.

The location grating that the utility model purpose is to provide a kind of mini-printer printhead in order to accurate response printhead displaced position improves the irregular and not attractive in appearance shortcoming of former printer prints character.

The solution that solves the utility model purpose is by setting up a location grating resetting about printer port of printer between (RESET) position, utilize former in the printer to be used for detecting about printhead to reset the grating pulse of gratings strips of print zone of the photo coupler detection and location grating that resets of (RESET) position.Photo coupler is to be fixed on printing head support part below owing to reset, move with printer support together with printhead, so but the grating pulse by the detection gratings strips just accurate response go out the accurate position of walking of printhead.The anti-main frame of sending back to of grating pulse of photo coupler output-response printhead walking position resets, export revised print pulse through main frame again, make print needle export the accurate drop point of revised print pulse by main frame, improved chinese character top and the bottom degree of registration, make the character pattern density that prints even, the font neat appearance.

Specifically describe the utility model in conjunction with the embodiments below by accompanying drawing.

Fig. 1 is the chinese character sample diagrammatic sketch of printing with existing mini-printer.

Fig. 2 is a kind of structural representation of the utility model location grating.

Fig. 3 is the utility model scheme of installation.

Fig. 4 is that the A-A of Fig. 3 is to view.

Fig. 5 is with the chinese character sample diagrammatic sketch that the location grating is printed has been installed.

With reference to shown in Figure 2, the location grating adopts the strip plastic sheet to make, be advisable on the sheet metal of its length with left and right resetting (RESET) end that can just be installed in printer, installation fixing position 2 is left at grating two ends, location, location grating central authorities are print zones 1, be shaped on some equidistant gratings strips 11 on 1 of print zone, gratings strips 11 equates with adjacent non-gratings strips 12 width.Be scratched for fear of the location grating, on the grating face, can establish a protecting film 3 protection.

Fig. 3, Fig. 4 are the installation site schematic diagrames of location grating, and wherein Fig. 4 is that the A-A of Fig. 3 is to view.As shown in the figure, during installation, as long as the two ends fixed bit 2 that will locate grating respectively with bonding agent and metal clip 4 be fixed on printhead 5 belows the photo coupler 7 that resets the inboard about reset on the sheet metal 6 of (RESET) end.

Fig. 4 illustrates as follows among Fig. 5: 5-printhead, 51-printing head support part, the sheet metal that resets about 6-, the 7-photo coupler that resets, 8-wiring board, 9-guide rail.

Fig. 5 is the chinese character master drawing that expression is printed with the mini-printer that the location grating is installed.Can know demonstration from figure, each Chinese character first half aligns with Lower Half, be greatly improved than character among Fig. 1 on the degree, and dot matrix is even, and whole printed words are neat, attractive in appearance.

The utility model characteristics are that structure is especially simple, with low cost, install easy and convenient, it Must not change mini-printer original structure state, can overcome because the printhead offset deviation and Inhomogeneous, the irregular shortcoming of printable character dot matrix density that causes makes the character that prints Neat appearance, thus print quality improved.

Claims

1, a kind of location grating of the mini-printer printhead in order to accurate response printhead displaced position is characterized in that being shaped on some equidistant gratings strips in the print zone of this location grating, and the two ends of this location grating are provided with and install and fix the position.

2, location according to claim 1 grating is characterized in that locating grating and adopts the strip plastic sheet to make.

3, location according to claim 1 and 2 grating, the gratings strips part that it is characterized in that locating grating is wide with adjacent non-gratings strips part.