CN202071512U

CN202071512U - Printing head

Info

Publication number: CN202071512U
Application number: CN2011201225220U
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: 2011-12-14
Anticipated expiration: 2021-04-22

Abstract

The utility model provides a printing head which comprises an outer shell and a needle seat assembly, wherein the needle seat assembly comprises a needle seat, a needle guide plate and a fixed rod; the needle guide plate extends upward from the needle seat; the fixed rod extends upward from the needle guide plate; and the shell is sleeved on the fixed rod and is matched through a bolt. The needle guide plate of the printing head extends upward from the needle seat, the fixed rod extends upward from the needle guide plate, and the shell is sleeved on the fixed rod and matched through the bolt, so that the bolt connection is more reliable, the needle seat assembly and the shell are easy to assemble, and the loosening of the whole structure can be avoided; meanwhile, the printing quality is more stable.

Description

Printhead

Technical field

The utility model relates to the printer technology field, relates 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 kind 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, client's use cost height.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.By this core component, the printing ink of colour band can be impacted on the medium, thereby finish 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 most widely used; Require the bill printed clear, complete just in these fields, great information dropout can not be arranged, thus for the 9 stylus printers seal head member 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 be fixed between them, but this fixed form is in producing assembling, cause the connection loosing of printhead integral body 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.

The utility model content

The purpose of this utility model is to overcome the defective of prior art, and a kind of simple, easy to operate, as to have reduced cost printhead that assembles is provided.

The utility model is to realize like this, a kind of printhead, comprise shell and needle stand assembly, described needle stand assembly comprises needle stand, guide board and fixed bar, described guide board extends upward from described needle stand, described fixed bar extends upward from described guide board, and described shell is enclosed within on the described fixed bar and cooperates with bolt.

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

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

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

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

Further, described pin hole is used for running through for print needle, and described pin hole is provided with 9, circle of the section constitution of described pin hole.

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

Further, described shell is an aluminium frame.

The utlity model has following technique effect:

1) guide board of the utility model printhead extends upward from described needle stand, described fixed bar extends upward from described guide board, described shell is enclosed within on the described fixed bar and cooperates with bolt, bolt connects more reliable, and make described needle stand assembly and described 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 utility model first alignment pin is fixed on described carriage on the described needle stand by 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) described iron core adopts silicon steel material, has increased the magnetic several times by silicon steel sheet, thereby has strengthened the magnetic attraction to print needle.

4) the further described shell of the utility model is an aluminium frame, and wherein, shell adopts aluminum alloy materials to make, 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 among the utility model embodiment;

Fig. 2 is the structural representation of needle stand assembly and carriage among the utility model embodiment;

Fig. 3 is the intact generalized section of printhead assembling among the utility model embodiment.

The specific embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

The basic functional principle of the utility model needle type print head: be to utilize machinery and circuit 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 finish print out task.Printer is under on line state, receive printing control command, character printing or the graphic printing order that PC sends by interface, again after the CPU processing by 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 utility model embodiment provides a kind of printhead 1 according to above-mentioned principle, comprise shell 13 and needle stand assembly 11, described needle stand assembly 11 comprises needle stand 111, guide board 112 and fixed bar 113, described guide board 113 extends upward from described needle stand 111, described fixed bar 113 extends upward from described guide board 112, and described shell 13 is enclosed within on the described fixed bar 113 and cooperates with bolt.Like this, the guide board 112 of the utility model printhead 1 extends upward from described needle stand 111, described fixed bar 113 extends upward from described guide board 112, described shell 13 is enclosed within on the described fixed bar 113 and cooperates with bolt, bolt connects more reliable, and make described needle stand assembly 11 and described 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 utility model specific embodiment structure, described needle stand 111, described guide board 112, described fixed bar 113 is by integrated injection molding, wherein guide board 112 is cylindrical, fixed bar 113 is here for having the screw rod of certain-length, also cylindrical, described carriage 12 is fixed on the described needle stand 111 by two alignment pins, described 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, described first alignment pin 114 is arranged on a side of described guide board 112, described second alignment pin 115 is arranged on the opposite side of described guide board 112, like this so that described carriage 12 is fixed on the described needle stand 111, the diameter of first alignment pin 114 described here is greater than the diameter of described second alignment pin 115, two alignment pins are distinct, make that assembling is simple to operation, the workman maloperation can not occur, carriage described in the prior art 12 is integrated with described needle stand 111, present embodiment can not be realized described carriage 12 is shaped on the described needle stand 111 because the Shooting Technique condition limits.

Please again referring to Fig. 2, in the utility model specific embodiment structure, described guide board 112 extends upward from the middle position of described needle stand 111, on described guide board 112, be provided with 9 pin holes 1121, described pin hole 1121 is through to the lower surface of described needle stand 111 from the upper surface of described guide board 112, and particularly, described pin hole 1121 is used for running through for print needle 116, described pin hole 1121 is provided with 9, circle of the section constitution of described pin hole 1121.

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

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

The above only is the utility model preferred embodiment; its structure is not limited to the above-mentioned shape of enumerating; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

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

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

3. a kind of printhead as claimed in claim 1 is characterized in that: described printhead also comprises a carriage, and described carriage is fixed on the described needle stand by 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 described guide board, one second alignment pin is arranged on the opposite side of described guide board, and the diameter of described first alignment pin is greater than the diameter of described second alignment pin.

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

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

7. a kind of printhead as claimed in claim 1 is characterized in that: described printhead comprises that also row is located at most interior coil blocks of described shell successively, and described coil block comprises coil and iron core, and described 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: described shell is an aluminium frame.