CN207433045U - It is applicable in the big thermal printer of print span - Google Patents

Abstract

The utility model, which provides a kind of big thermal printer of print span that is applicable in, to be included main body rack, print head assembly, roll shaft and pre-tightens component, the print head assembly is located at the roll shaft in main body rack, and recording sheet transfer passage is equipped with therebetween, the preload component and the print head assembly elastic connection, the preload component applies the print head assembly pretightning force, and pre-tightens force direction towards the roll shaft；Print state, the roll shaft form line on print wire with the print head assembly, recording sheet and contact, and the perpendicular bisector of the print wire is print center line；The preload component includes multiple elastic components, and the stiffness factor of multiple elastic components is identical, and multiple elastic components are symmetrical as line of symmetry using print center line；The print head assembly is bigger closer to pretightning force suffered by print center line.So that elastic force is drawn close toward print center line, avoid the problem that light both sides are dense among printing appearance, just can obtain preferable printing effect.

Description

It is applicable in the big thermal printer of print span

Technical field

The utility model is related to the technical fields of printer, and the big temperature-sensitive of print span is applicable in particular to a kind of Printer.

Background technology

Thermal printer or thermosensitive printing device, usually using the thermal printing paper for being coated with special film layer, by beating Print head is contacted and heated with printing paper so that film layer changes colour and leave a trace to form pattern after a period of time is heated.It is printing State, print head need have certain pretightning force to heat-sensitive paper, and the general spring using equal distribution applies pressure to print head, And then print head generates pressure to heat-sensitive paper.

When print span is at 6 cun or more, the spring of equal distribution easily causes malformation due to span is big, and then leads Printing is caused intermediate the phenomenon that arriving edge gradation unequal occur.Existing Normal practice be increase among the print head structure or in Between use different elastic force spring, with improve among to edge concentration it is uneven the phenomenon that.However increase structure among print head, Structure can be become more complicated, also bring along the increase of cost.Using the spring of different elastic force, puzzlement can be brought to assembling, Also the probability of loading error can be increased while increasing cost.

Utility model content

The utility model, which provides, a kind of is applicable in the big thermal printer of print span, it is intended to improve the printing in span length The problem of being susceptible to gradation unequal, and there are complicated or assembling puzzlements from the spring using different elastic force for increase structure The problem of big.

The utility model is realized in this way：

The big thermal printer of print span is applicable in, the thermal printer includes main body rack, print head assembly, roll shaft With preload component, the print head assembly is located at the roll shaft in main body rack, and it is logical to be equipped with recording sheet conveying therebetween Road, the preload component and the print head assembly elastic connection, the preload component, which applies the print head assembly, to be pre-tightened Power, and force direction is pre-tightened towards the roll shaft；

Print state, the roll shaft form line on print wire with the print head assembly, recording sheet and contact, the printing The perpendicular bisector of line is print center line；The preload component includes multiple elastic components, the stiffness system of multiple elastic components Number is identical, and multiple elastic components are symmetrical as line of symmetry using print center line；The print head assembly is in printing Pretightning force suffered by heart line is bigger.

Further, in the utility model preferred embodiment, multiple elastic components differ on print wire direction Away from distribution, become larger centered on the print center line to both sides of the edge, the spacing of the two neighboring elastic component.

Further, in the utility model preferred embodiment, between multiple elastic components and the print wire Spacing is equal.

Further, in the utility model preferred embodiment, the spacing of multiple elastic components and the print wire Unequal, distance of the elastic component apart from the print wire closer to the print wire center line is smaller.

Further, in the utility model preferred embodiment, multiple elastic components are first-class of print wire direction Away from distribution.

The beneficial effects of the utility model are：The utility model is applicable in the big heat of print span by what above-mentioned design obtained Quick printer, the distribution by adjusting elastic component on print wire direction or on print center line direction so that elastic force is past to be beaten Print center line is drawn close, and avoids the problem that print head assembly intermediate deformation causes greatly light both sides among printing appearance dense, without increasing Mechanism or the spring using different elastic force, just can obtain preferable printing effect.

Description of the drawings

It, below will be to required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment The attached drawing used is briefly described, it should be understood that and the following drawings illustrates only some embodiments of the utility model, therefore not The restriction to scope is should be considered as, for those of ordinary skill in the art, without creative efforts, It can also be obtained according to these attached drawings other relevant attached drawings.

Fig. 1 is the utility model embodiment 1, structure diagram of the printer under the first visual angle；

Fig. 2 is the utility model embodiment 1, structure diagram of the printer under the second visual angle；

Fig. 3 is the utility model embodiment 1, sectional view of the printer along print center line；

Fig. 4 is the utility model embodiment 2, structure diagram of the printer under a visual angle；

Icon：X- print wires；Z- print center lines；1- main body racks；2- roll shafts；3- pre-tightens component；31- elastic components；4- Print head assembly；41- print heads；42- support plates.

Specific embodiment

To make the purpose, technical scheme and advantage of the utility model embodiment clearer, below in conjunction with this practicality The technical solution in the utility model embodiment is clearly and completely described in attached drawing in new embodiment, shows So, described embodiment is the embodiment of a part of embodiment of the utility model rather than whole.Based on this practicality Embodiment in new, those of ordinary skill in the art are obtained every other without creative efforts Embodiment shall fall within the protection scope of the present invention.Therefore, the implementation to the utility model provided in the accompanying drawings below The detailed description of mode is not intended to limit claimed the scope of the utility model, but is merely representative of the utility model Selected embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative labor The every other embodiment obtained under the premise of dynamic, shall fall within the protection scope of the present invention.

In the description of the utility model, it is to be understood that term " " center ", " length ", " width ", " top ", " bottom ", The orientation or position relationship of instructions such as " interior " are based on orientation shown in the drawings or position relationship, are for only for ease of and describe this reality There must be specific orientation, with equipment that is simplifying description rather than instruction or hint meaning or element with specific with new Azimuth configuration and operation, therefore it is not intended that limitation to the utility model.

In addition, in the description of the utility model, " multiple " are meant that two or more, unless otherwise clearly having The restriction of body.

In the utility model, unless otherwise clearly defined and limited, the terms such as term " connection ", " fixation " should be done extensively Reason and good sense solution, for example, it may be being fixedly connected or being detachably connected or integral；Can be mechanical connection, it can also It is electrical connection；Can be directly connected, can also be indirectly connected by intermediary, can be connection inside two elements or The interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned Concrete meaning of the term in the utility model.

Embodiment 1, referring to figs. 1 to shown in Fig. 3：

Thermal printer includes main body rack 1, print head assembly 4, roll shaft 2 and pre-tightens component 3, print head assembly 4 and roller Axis 2 is located in main body rack 1.The length direction of print head assembly 4 is identical with the axial direction of roll shaft 2, and is equipped with record therebetween Paper transfer passage, i.e. recording sheet pass through from passage therebetween.Pre-tighten component 3 and 4 elastic connection of print head assembly, preload group Part 3 applies print head assembly 4 pretightning force, and pre-tightens force direction towards roll shaft 2 so that and print head assembly 4 is contacted with recording sheet, And recording sheet is heated and realizes printing.Therefore, pre-tighten component 3 to act on the pressure of print head assembly 4, directly affect printhead cluster Part 4 influences the deep or light of printing to the heating state of recording sheet.

Print state, roll shaft 2 form line on print wire X with print head assembly 4, recording sheet and contact.Print state is lower to be beaten Print head assembly 4 is contacted with record paper yarn, and 4 surface of print head assembly is printing with the line that record paper yarn contacts when both definition print Line X.The perpendicular bisector of print wire X is print center line Z, and print center line Z is virtual line, is retouched for ease of space structure It states.

Preferably, pre-tightening component 3 includes multiple elastic components 31, and the stiffness factor of multiple elastic components 31 is identical, uses stiffness The identical elastic component 31 of coefficient is convenient for assembling, without identifying or remembeing the matching relationship between position and elastic component 31.Multiple bullets Property part 31 is symmetrical as line of symmetry using print center line Z, and print head assembly 4 is got over closer to pretightning force suffered by print center line Z Greatly, overcome the problems, such as that print head assembly 4 is bigger closer to the position deflection of print center line Z, realize on whole print wire X Print uniform effect.

Further, print head assembly 4 includes print head 41 and support plate 42, and print head 41 is located in support plate 42, props up Several connecting holes are offered on fagging 42.Elastic component 31 uses helical spring, the both ends of elastic component 31 be respectively fixedly connected connecting hole with Main body rack 1.The axial direction of elastic component 31 is substantially vertical with support plate 42, and the elastic force direction that elastic component 31 applies is basically perpendicular to branch Fagging 42.

Preferably, multiple elastic components 31 unequally distributed blades in print wire X-direction, to two centered on print center line Z Lateral edges, the spacing of two neighboring elastic component 31 become larger.Specifically, two elastic components 31 near print center line Z Spacing is d1, or between two elastic components 31 near print center line Z and the elastic component 31 that is located on print center line Z Away from for d1, secondary close elastic component 31 is d2 with hithermost 31 spacing of elastic component, and so on, the elastic component 31 at most edge with time The elastic component 31 at edge is dn.Wherein, dn ＞ ... ＞ d2 ＞ d1.Using from center to both sides, 31 spacing of elastic component becomes larger Distribution mode so that pretightning force is drawn close to print center line Z, enables to intermediate deep or light uniformly with both sides printing, and is not increased Add structure or the elastic component 31 using different elastic force, there is structure optimization and printing effect is good.

Preferably, multiple elastic components 31 are equal with the spacing between print wire X.I.e. multiple elastic components 31 are located at same straight line On, and the straight line is parallel with print wire X, optimizes structure.

Embodiment 2, with reference to shown in Fig. 4：

1 phase of technique effect and embodiment of the printer that the utility model embodiment is provided, realization principle and generation Together, to briefly describe, the present embodiment does not refer to part, can refer to corresponding contents in embodiment 1.

Embodiment 2 and embodiment 1 difference lies in：The spacing of multiple elastic components 31 and print wire X is unequal, closer to beating It is smaller to print distance of the elastic component 31 of line X center lines apart from print wire X.It is more remote apart from print wire X, accordingly to print wire X It is smaller to put the elastic force of generation, with similarly elastic force being enabled to be drawn close to print center line Z.

Multiple elastic components 31 equidistantly distributed in print wire X-direction, i.e. dn=...=d2=d1.Optimize structure, reduce Equipment making difficulty.It is of course also possible to using in embodiment 1, multiple elastic components 31 Unequal distance point in print wire X-direction Cloth, to both sides of the edge centered on print center line Z, mode that the spacing of two neighboring elastic component 31 becomes larger.

It these are only the preferred embodiment of the utility model, be not intended to limit the utility model, for ability For the technical staff in domain, various modifications and changes may be made to the present invention.It is all the spirit and principles of the utility model it Interior, any modifications, equivalent replacements and improvements are made should be included within the scope of protection of this utility model.

Claims (5)

1. it is applicable in the big thermal printer of print span, which is characterized in that the thermal printer includes main body rack, print head Component, roll shaft and preload component, the print head assembly are located at the roll shaft in main body rack, and are equipped with record therebetween Paper transfer passage, the preload component and the print head assembly elastic connection, the preload component is to the print head assembly Apply pretightning force, and pre-tighten force direction towards the roll shaft；

Print state, the roll shaft form line on print wire with the print head assembly, recording sheet and contact, the print wire Perpendicular bisector is print center line；The preload component includes multiple elastic components, the stiffness factor phase of multiple elastic components Together, multiple elastic components are symmetrical as line of symmetry using print center line；The print head assembly is closer to print center line Suffered pretightning force is bigger.

2. according to claim 1 be applicable in the big thermal printer of print span, which is characterized in that multiple elastic components It is arranged at intervals along print wire, and unequally distributed blades between multiple elastic components, to both sides centered on the print center line Edge, the spacing of the two neighboring elastic component become larger.

3. according to claim 2 be applicable in the big thermal printer of print span, which is characterized in that multiple elastic components Spacing between the print wire is equal.

4. according to claim 1 be applicable in the big thermal printer of print span, which is characterized in that multiple elastic components It is unequal with the spacing of the print wire, closer to the print wire center line the elastic component apart from the print wire away from From smaller.

5. according to claim 4 be applicable in the big thermal printer of print span, which is characterized in that multiple elastic components The equidistantly distributed on print wire direction.