CN102744974A

CN102744974A - Needle type printing head

Info

Publication number: CN102744974A
Application number: CN2011100977605A
Authority: CN
Inventors: 赵慧
Original assignee: Multi & Information Technology (shenzhen) Co Ltd
Current assignee: Multi & Information Technology (shenzhen) Co Ltd
Priority date: 2011-04-19
Filing date: 2011-04-19
Publication date: 2012-10-24

Abstract

The invention provides a needle type printing head comprising a casing and a plurality of coil components which are sequentially arranged in the casing, wherein each coil component comprises a coil and a plurality of silicon steel sheets, and every two silicon steel sheets are mutually superposed; and moreover, parts of the silicon steel sheets are installed in the coils. In this way, the mode of installing the silicon steel sheets in the coils in a mutually superposed way is adopted according to the printing head provided by the invention, so that the magnetism is increased by a plurality of times, and magnetic attraction force to a needle arm is increased. Therefore, the printing quality is more excellent.

Description

Needle type print head

Technical field

The present invention relates to the printer technology field, relate in particular to the improvement of printhead in a kind of impact printer.

Background technology

In the printer field, mainly contain ink-jet at present, laser, the printing type that temperature-sensitive and stylus printing are four types.And the advantage of first three is that noise is little, and it is clear to print, and shortcoming is to print single-layer medium, and consumptive material is more expensive, and client's use cost is high.And the advantage of stylus printing technology is printable multilayer copy paper, and consumptive material is cheap, and client's use cost is low; But it is bigger that shortcoming is a noise; But because the advantage of the printable multilayer copy paper of impact printer, in finance, there is irreplaceable widely application in fields such as tax revenue.

In the stylus printing technology, printhead is a wherein the most key core component.Through this core component, can the printing ink of colour band be impacted on the medium, thereby accomplish print procedure; Usually needle type print head can be divided into 9 pins according to the requirement of print quality, 18 pins, 24 pins, 28 pins even more, the pin number how much determined printhead impact precision and ability, yet the increase that the pin number can bring material cost and difficulty of processing more at most; Present 9 stylus printers are imprinted on finance, tax revenue, and fields such as POS machine are used the most extensive; But in these fields, the bill that requires to print clear, complete, great information dropout can not be arranged; So 9 stylus printers seal head member for the printer core; Must be reasonable in design, reliable in function, and have certain life-span could satisfy the printing requirement.

So, in the existing 9 pin printhead technology, iron-core coil partly adopts magnetic metal cast-in-block technology; But this technical matters is complicated, and material requirements is high, so; Still there is defective in this prior art, and the existing a kind of new needle type print head of design that needs is used on the printer to overcome above-mentioned deficiency.

Summary of the invention

The objective of the invention is to overcome the defective of prior art, provide a kind of and processed simply, assemble easily and the strong needle type print head of coil block magnetic.

The present invention realizes like this; A kind of needle type print head; Comprise a shell and arrange most coil blocks that are located in the said shell successively, each said coil block comprises a coil and a majority silicon steel sheet, and each said silicon steel sheet mutual superposition and part are installed in the said coil.

Further, said silicon steel sheet is U type shape, and wherein a side is in said coil.

Further, be provided with Embedding Material in the space between every adjacent two said coil blocks.

Further, below each said coil block, be provided with two pins, said pin is electrically connected to a circuit board.

Further, between said shell and said circuit board, an insulating part is set, said insulating part is installed in the below of said shell, and said pin runs through said insulating part.

Further, said coil has a base portion, and said base portion extends upward a coil portion, extends said pin downwards, and said silicon steel sheet is located between the two said pins and an end of said silicon steel sheet is located in the said coil portion.

Further, said shell is the aluminium frame.

The present invention has following technique effect:

1) printhead of the present invention adopts silicon steel sheet mutual superposition and part to be installed in the said coil, has increased the magnetic several times, has strengthened the magnetic attraction to the pin arm, thereby has made print quality better.

2) all be provided with Embedding Material in the space between two whenever adjacent coil blocks, Embedding Material can effectively be fixed two adjacent coil blocks, makes them more firm; Embedding Material can also effectively distribute the heat that produces from coil working simultaneously, helps the stable of said printhead.

3) the further said shell of the present invention is the aluminium frame, and heat distributed when the aluminium frame that aluminum alloy materials is processed was convenient to the work of printhead interior loop.

Description of drawings

Fig. 1 is an embodiment of the invention needle type print head structural representation;

Fig. 2 is the structural representation of embodiment of the invention coil block;

Fig. 3 is another structural representation of embodiment of the invention needle type print head;

Fig. 4 is the side view of embodiment of the invention needle type print head.

The specific embodiment

In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.

The basic functional principle of needle type print head of the present invention: be to utilize machinery and drives principle, make print needle clash into colour band and print media, and then print dot matrix, form character or figure by dot matrix again and accomplish print out task.Printhead is under on line state; Receive printing control command, character printing or the graphic printing order that PC sends through interface; Again after the CPU processing through printhead; From character library, seek and this character or first address of the corresponding picture coding of figure (when forward is printed) or terminal column address (when oppositely printing), like this one finds out coding with being listed as and is sent to print-head drive circuit, and the excitation printhead goes out the impact printer seal.

Referring to Fig. 1-Fig. 2; The embodiment of the invention provides a kind of needle type print head 1 according to above-mentioned principle; Comprise a shell 11 and arrange most coil blocks 12 that are located in the said shell 11 successively; Each said coil block 12 comprises a coil 121 and most silicon steel sheets 122, and each said silicon steel sheet 122 mutual superposition and part are installed in the said coil 121.Like this, printhead 1 of the present invention adopts silicon steel sheet 122 mutual superposition to be installed in the said coil 121, has increased the magnetic several times, has strengthened the magnetic attraction to the pin arm, thereby has made print quality better.

Further, in the specific embodiment of the invention, said silicon steel sheet 122 roughly is U type structure; Wherein a side is in said coil 121; U type silicon steel sheet 122 wherein half passes coil 121 and is installed with within it, with the magnetic of intensifier coil, wherein; Said silicon steel sheet 122 is a kind of low silicon-iron soft magnetic alloys of carbon electrode that contain, and its silicon content is 0.5～4.5%.

See also shown in Figure 3ly, be provided with Embedding Material in the space between every adjacent two said coil blocks 12, Embedding Material can effectively be fixed two adjacent coil blocks 12, makes them more firm; Embedding Material can also effectively distribute the heat that is produced from coil 121 work simultaneously, helps the stable of said printhead 1, and wherein, Embedding Material generally uses epoxy resin or/and setting glue also can be admixed some coloring agents certainly and become to grade on its surface.

Further, referring to Fig. 1, said shell 11 is the aluminium frame; The distributing of heat when the aluminium frame that aluminum alloy materials is processed is convenient to printhead interior loop 121 work cooperates Fig. 2, shown in Figure 4 again, below each said coil block 12, is provided with two pins 123; Said pin 123 is electrically connected to a circuit board 13; Particularly, an insulating part 14 is set between said shell 11 and said circuit board 13, said insulating part 14 is installed in the below of said shell 11; Distributed and arranged has a plurality of steady pins 141 on said insulating part 14; Said steady pin 141 can correspondingly one by one respectively be plugged in the set mounting groove of said shell 111, on said insulating part 14, also is provided with the through hole 142 of corresponding said pin, and said pin 123 runs through said insulating part 14 through said through hole 142 one by one.Said insulating part 14 forms a semi-enclosed cavity with said shell 11; Its two, said insulating part 14 can separate said shell 11 and said circuit board 13 to play the effect of insulation.Side at said insulating part 14 also is provided with a socket 15, and said socket 15 is interface end that printhead 1 connects printer.

Further; In the concrete example structure of the present invention; It is concrete that said coil 121 has a base portion 1211 with reference to shown in Figure 2, from said base portion 1211 extend upward a coil portion 1212, said coil portion 1212 is the cylinder hollow form; Said base portion 1211 extends said pin 123 downwards, and said silicon steel sheet 122 is located between two said pins 123 and an end of said silicon steel sheet 122 is located in the said coil portion 1212.

The above is merely preferred embodiment of the present invention, and its structure is not limited to the above-mentioned shape of enumerating, and all any modifications of within spirit of the present invention and principle, being done, is equal to replacement and improvement etc., all should be included within protection scope of the present invention.

Claims

1. needle type print head; Comprise a shell and arrange most coil blocks that are located in the said shell successively; It is characterized in that: each said coil block comprises a coil and most silicon steel sheets, and each said silicon steel sheet mutual superposition and part are installed in the said coil.

2. a kind of needle type print head as claimed in claim 1 is characterized in that: said silicon steel sheet is U type shape, and wherein a side is in said coil.

3. a kind of needle type print head as claimed in claim 1 is characterized in that: be provided with Embedding Material in the space between the two whenever adjacent said coil blocks.

4. a kind of needle type print head as claimed in claim 1 is characterized in that: below each said coil block, be provided with two pins, said pin is electrically connected to a circuit board.

5. a kind of needle type print head as claimed in claim 4 is characterized in that: between said shell and said circuit board, an insulating part is set, said insulating part is installed in the below of said shell, and said pin runs through said insulating part.

6. a kind of needle type print head as claimed in claim 5; It is characterized in that: said coil has a base portion; Said base portion extends upward a coil portion, extends said pin downwards, and said silicon steel sheet is located between the two said pins and an end of said silicon steel sheet is located in the said coil portion.

7. a kind of needle type print head as claimed in claim 1 is characterized in that: said shell is the aluminium frame.