CN102744975A

CN102744975A - Printing head

Info

Publication number: CN102744975A
Application number: CN2011101028833A
Authority: CN
Inventors: 赵慧
Original assignee: Multi & Information Technology (shenzhen) Co Ltd
Current assignee: Shenzhen win win innovation Polytron Technologies Inc
Priority date: 2011-04-22
Filing date: 2011-04-22
Publication date: 2012-10-24
Anticipated expiration: 2031-04-22
Also published as: CN102744975B

Abstract

The invention provides a printing head comprising a shell and a needle file assembly. The needle file assembly comprises a needle file, a needle guide plate and a fixing rod, wherein the needle guide plate extends upwards from the needle file, the fixing rod extends upwards from the needle guide plate, and the shell is sheathed on the fixing rod so as to be matched by virtue of a bolt. Therefore, according to the needle guide plate of the printing head provided by the invention, the needle guide plate extends upwards from the needle file, the fixing rod extends upwards from the needle guide plate, the shell is sheathed on the fixing rod so as to be matched by virtue of the bolt, so that the connection of the bolt is reliable, the needle file assembly and the shell can be assembled easily, the whole structure can not loosen, and meanwhile, the printing quality is stable.

Description

Printhead

Technical field

The present invention relates to the printer technology field, relate in particular to a kind of improvement of print head structure.

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 printhead 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, wherein 9 stylus printers are imprinted on finance, tax revenue, fields such as POS machine are used the most extensive; Require the bill of printing clear, complete just in these fields, great information dropout can not be arranged, thus print head member for 9 stylus printers of printer core, must be reasonable in design, reliable in function, and have certain life-span could satisfy the printing requirement.

Existing 9 needle type print heads to the needle stand assembly of printhead and shell mount the time, adopt the mode of mutual trip to fix between them; But this fixed form is in producing assembling; Cause the whole connection loosing of printhead easily, thereby influence the unstable or decline of print quality, simultaneously; Because the high-frequency of print needle impacts when printing, noise also increases easily.

Therefore, in sum, still there is defective in above-mentioned prior art, and the existing a kind of new printhead of design that needs is to overcome above-mentioned deficiency.

Summary of the invention

The objective of the invention is to overcome the defective of prior art, a kind of simple, easy to operate, as to have reduced cost printhead that assembles is provided.

The present invention realizes like this; A kind of printhead; Comprise shell and needle stand assembly, said needle stand assembly comprises needle stand, guide board and fixed bar, and said guide board extends upward from said needle stand; Said fixed bar extends upward from said guide board, and said shell is enclosed within on the said fixed bar and cooperates with bolt.

Further, said needle stand, said guide board, said fixed bar are integrated injection moldings.

Further, said printhead also comprises a carriage, and said carriage is fixed on the said needle stand through at least two alignment pins.

Further, one first alignment pin is arranged on a side of said guide board, and one second alignment pin is arranged on the opposite side of said guide board, and the diameter of said first alignment pin is greater than the diameter of said second alignment pin.

Further, said guide board extends upward from the middle position of said needle stand, on said guide board, is provided with most pin holes, and said pin hole is through to the lower surface of said needle stand from the upper surface of said guide board.

Further, said pin hole is used to supply print needle to run through, and said pin hole is provided with 9, circle of the section constitution of said pin hole.

Further, printhead comprises that also row is located at most coil blocks in the said shell successively, and said coil block comprises coil and iron core, and said iron core is a kind of silicon steel sheet of U type structure.

Further, said shell is an aluminium frame.

The present invention has following technique effect:

1) guide board of printhead of the present invention extends upward from said needle stand; Said fixed bar extends upward from said guide board; Said shell is enclosed within on the said fixed bar and cooperates with bolt, and bolt connects more reliable, and makes said needle stand assembly and said shell ratio be easier to assembling; Can not cause integrally-built becoming flexible, make that simultaneously print quality is more stable.

2) diameter of the present invention's first alignment pin is fixed on said carriage on the said needle stand through these two alignment pins greater than the diameter of second alignment pin, makes that assembling is simple to operation, and the workman maloperation can not occur.

3) said iron core adopts silicon steel material, has increased the magnetic several times through silicon steel sheet, thereby has strengthened the magnetic attraction to print needle.

4) the further said shell of the present invention is an aluminium frame, and wherein, shell adopts aluminum alloy materials to process, and heat distributes when being convenient to the work of printhead interior loop.

Description of drawings

Fig. 1 is the decomposing schematic representation of printhead in the embodiment of the invention;

Fig. 2 is the structural representation of needle stand assembly and carriage in the embodiment of the invention;

Fig. 3 is the intact generalized section of printhead assembling in the embodiment of the invention.

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.Printer 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 printer; 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. 3; The embodiment of the invention provides a kind of printhead 1 according to above-mentioned principle; Comprise shell 13 and needle stand assembly 11, said needle stand assembly 11 comprises needle stand 111, guide board 112 and fixed bar 113, and said guide board 113 extends upward from said needle stand 111; Said fixed bar 113 extends upward from said guide board 112, and said shell 13 is enclosed within on the said fixed bar 113 and cooperates with bolt.Like this; The guide board 112 of printhead 1 of the present invention extends upward from said needle stand 111, and said fixed bar 113 extends upward from said guide board 112, and said shell 13 is enclosed within on the said fixed bar 113 and cooperates with bolt; Bolt connects more reliable; And make said needle stand assembly 11 and said shell 13 and assemble, can not cause integrally-built becoming flexible, make that simultaneously print quality is more stable than being easier to.

Further, in the concrete example structure of the present invention, said needle stand 111, said guide board 112, said fixed bar 113 are through integrated injection molding; Wherein guide board 112 is cylindrical, and fixed bar 113 is here for having the screw rod of certain-length, and is also cylindrical; Said carriage 12 is fixed on the said needle stand 111 through two alignment pins, and said carriage 12 is in order to form the cavity of a sealing, particularly; These two alignment pins are respectively first alignment pin 114 and second alignment pin 115, and said first alignment pin 114 is arranged on a side of said guide board 112, and said second alignment pin 115 is arranged on the opposite side of said guide board 112; Like this so that said carriage 12 is fixed on the said needle stand 111; The diameter of first alignment pin 114 described here is greater than the diameter of said second alignment pin 115, and two alignment pins are distinct, makes that assembling is simple to operation; The workman maloperation can not occur; Carriage described in the prior art 12 is integrated with said needle stand 111, and present embodiment can not be realized said carriage 12 is shaped on the said needle stand 111 because the Shooting Technique condition limits.

Please again referring to Fig. 2, in the concrete example structure of the present invention, said guide board 112 extends upward from the middle position of said needle stand 111; On said guide board 112, be provided with 9 pin holes 1121; Said pin hole 1121 is through to the lower surface of said needle stand 111 from the upper surface of said guide board 112, and particularly, said pin hole 1121 is used to supply 116 of print needles to run through; Said pin hole 1121 is provided with 9, circle of the section constitution of said pin hole 1121.

Further; The printhead 2 of 1 mount of printhead fixed structure; Comprise that also row is located at most coil blocks 14 in the said shell 13 successively, said coil block 14 comprises coil 141 and iron core 142, and said iron core 142 is a kind of silicon steel sheet of U type structure; Increased the magnetic several times through silicon steel sheet, thereby strengthened magnetic attraction print needle 116; Heat distributed when the frame structure that said shell 13 is processed for aluminum alloy materials, aluminum alloy materials were convenient to 141 work of printhead 1 interior loop.

Further; As shown in Figure 1; Said printhead 2 also comprises a nut 15 and a pin arm component 16, and said pin arm component 16 is assemblied on the said shell 13, the fixing pin arm 161 of print needle in it; Wherein, said nut 15 cooperatively interacts with fixing said coil block 14 and said print needle with said fixed bar 113.

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. printhead; Comprise shell and needle stand assembly, it is characterized in that: said needle stand assembly comprises needle stand, guide board and fixed bar, and said guide board extends upward from said needle stand; Said fixed bar extends upward from said guide board, and said shell is enclosed within on the said fixed bar and cooperates with bolt.

2. a kind of printhead as claimed in claim 1 is characterized in that: said needle stand, said guide board, said fixed bar are integrated injection moldings.

3. a kind of printhead as claimed in claim 1 is characterized in that: said printhead also comprises a carriage, and said carriage is fixed on the said needle stand through at least two alignment pins.

4. a kind of printhead as claimed in claim 3; It is characterized in that: one first alignment pin is arranged on a side of said guide board; One second alignment pin is arranged on the opposite side of said guide board, and the diameter of said first alignment pin is greater than the diameter of said second alignment pin.

5. a kind of printhead as claimed in claim 1; It is characterized in that: said guide board extends upward from the middle position of said needle stand; On said guide board, be provided with most pin holes, said pin hole is through to the lower surface of said needle stand from the upper surface of said guide board.

6. a kind of printhead as claimed in claim 5 is characterized in that: said pin hole is used to supply print needle to run through, and said pin hole is provided with 9, circle of the section constitution of said pin hole.

7. a kind of printhead as claimed in claim 1 is characterized in that: said printhead comprises that also row is located at most coil blocks in the said shell successively, and said coil block comprises coil and iron core, and said iron core is a kind of silicon steel sheet of U type structure.

8. a kind of printhead as claimed in claim 7 is characterized in that: said shell is an aluminium frame.