CN219856499U

CN219856499U - Thermal printer

Info

Publication number: CN219856499U
Application number: CN202321132207.5U
Authority: CN
Inventors: 钮李明
Original assignee: Xiamen Pinnacle Electrical Co ltd
Current assignee: Xiamen Pinnacle Electrical Co ltd
Priority date: 2023-05-11
Filing date: 2023-05-11
Publication date: 2023-10-20
Anticipated expiration: 2033-05-11

Abstract

The utility model provides a thermal printer, which comprises a printer body, a printer rubber roll side assembly and a printing head piece side assembly, wherein the printer rubber roll side assembly is arranged on the printer body; the printer rubber roll side assembly is provided with two first clamping hooks distributed left and right and positioning shaft sleeves positioned at two sides of the rubber roll, and the two positioning shaft sleeves are provided with first positioning matching structures; the printing head sheet side assembly is provided with two second clamping hooks and two second positioning matching structures which are distributed along the left and right directions; the printing head piece side component covers the printer rubber roller side component and is fixed by hooking the first clamping hooks on the left side and the right side with the second clamping hooks, and the first positioning matching structure is matched with the second positioning matching structure so that the rubber roller and the printing head piece side component are accurately limited in the paper outlet direction. The accurate closing and positioning of the superposition of the heating unit position of the printing head piece side component and the tangent position of the outer diameter of the rubber roller side component of the printer is realized.

Description

Thermal printer

Technical Field

The present utility model relates to a thermal printer.

Background

The thermal printer has the structure shown in fig. 1, and comprises a printer body 10, a printer rubber roller side assembly 20 fixed on the printer body 10, and a printing head piece side assembly 30 in hinged arrangement; the print head side assembly 30 corresponds to the printer rubber roll side assembly 20, the print head side assembly 30 covers the print head side assembly 20 to form a paper feeding channel, and the rubber roll 21 of the printer rubber roll side assembly 20 presses the paper 1 on a plane where the heating unit 31 of the print head side assembly 30 is located. The rubber roller 21 drives the paper 1 to advance, and the heating unit 31 in the printing head sheet side assembly 30 heats according to the printing information content under the control of the printing control program, so that the corresponding information content is displayed at the corresponding position of the thermal paper, and the printing of the thermal printer is realized.

The key factor of the printing effect of the thermal printer is the fitting precision of the print head piece and the rubber roller 21, and the theoretical best effect is that the position of the printing heating unit 31 in the print head piece is tangential and overlapped with the outer diameter of the rubber roller 21, but the position precision of the print head piece side assembly 30 when being covered on the print head piece side assembly 20 is generally poor at present, and needs further improvement.

Disclosure of Invention

Therefore, the present utility model provides a thermal printer capable of being precisely positioned to solve the above problems.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

a thermal printer comprises a printer body, a printer rubber roller side assembly fixed on the printer body, and a printing head piece side assembly hinged on the printer body or the printer rubber roller side assembly; the method comprises the steps of defining the axial direction of a rubber roller side assembly of a printer to be a left-right direction, wherein the rubber roller side assembly of the printer is provided with two first clamping hooks distributed along the left-right direction and positioning shaft sleeves positioned at two sides of the rubber roller, and the two positioning shaft sleeves are provided with first positioning matching structures; the printing head sheet side assembly is provided with two second clamping hooks and two second positioning matching structures which are distributed along the left and right directions; the printing head piece side assembly covers the printer rubber roller side assembly and is hooked and fixed with the second hook through the first hook on the left side and the right side, and the first positioning matching structure on the left side and the right side is matched with the second positioning matching structure so that the rubber roller and the printing head piece side assembly form limit in the paper outlet direction.

Further, the first clamping hook is a movable clamping hook, an elastic piece is arranged on the printer rubber roll side assembly, the elastic piece applies a force for keeping the first clamping hook, and a driving button for driving the first clamping hook to unhook is further arranged on the outer side of the printer rubber roll side assembly.

Further, a connecting shaft is arranged on the printer rubber roll side assembly, and first clamping hooks at the left side and the right side are respectively and fixedly assembled at two ends of the connecting shaft.

Further, the driving button is provided with one first clamping hook and is matched with one first clamping hook.

Further, the drive button includes elasticity and presses the section and have the butt section of slope leading edge, the outer tip of the elasticity of drive button presses the section and fixes the outside edge at printer rubber roll side subassembly, the slope leading edge butt of butt section is on first trip.

Further, the first hook is provided with a first support arm and a second support arm, the first support arm is provided with a hook part for hooking and fixing the second hook, and the inclined guide edge of the abutting section abuts against the second support arm of the first hook.

Further, the elastic piece is a torsion spring sleeved on the connecting shaft, one torsion arm of the torsion spring is fixed on a fixed component of the printer rubber roll side assembly, and the other torsion arm is abutted on the first clamping hook so as to apply a force for keeping the first clamping hook.

Further, the second hook is a fixed hook, and the second hook and the second positioning matching structure on the same side are formed on the same cover plate of the print head sheet side assembly.

Further, the first positioning matching structure is a positioning bayonet arranged on the positioning shaft sleeve, the second positioning matching structure is a positioning convex part arranged in a protruding mode, and when the printing head piece side assembly covers the printer rubber roller side assembly, the positioning convex parts on the left side and the right side are respectively inserted into the positioning bayonet to form left and right limiting.

The technical scheme provided by the utility model has the following beneficial effects:

when the printing head piece side assembly is covered on the printer rubber roll side assembly, the first clamping hooks and the second clamping hooks at the left side and the right side are hooked and fixed, so that the closing limit of the printing head piece side assembly and the rubber roll side assembly in the covering direction is realized, and meanwhile, the first positioning matching structure and the second positioning matching structure are matched to enable the rubber roll and the printing head piece side assembly to form limit in the paper outlet direction; the accurate limit in the paper outlet direction is realized; thereby realizing the accurate closing and positioning of the coincidence of the heating unit position of the printing head piece side assembly and the tangential position of the outer diameter of the rubber roller side assembly of the printer; the positioning accuracy is high, and the structure is simple.

Drawings

FIG. 1 is a schematic diagram of a thermal printer according to the related art;

FIG. 2 is a schematic perspective view showing a thermal printer in a hook-off state according to an embodiment;

FIG. 3 is a schematic diagram showing a second perspective structure of the thermal printer in a hook-off state according to the embodiment;

FIG. 4 is a partial cross-sectional view of a thermal printer in an unhooked state according to an embodiment;

fig. 5 is a schematic perspective view showing a thermal printer in a hook state according to an embodiment;

FIG. 6 is a partial cross-sectional view showing a thermal printer in a hook state according to the embodiment;

fig. 7 is a schematic structural diagram of the first hook set in an assembled state in the embodiment;

FIG. 8 is an exploded view of the first hook assembly according to the embodiment;

fig. 9 is a schematic diagram illustrating the cooperation between the first hook and the elastic member in the embodiment.

Detailed Description

For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.

The utility model will now be further described with reference to the drawings and detailed description.

Referring to fig. 2 to 9, the thermal printer according to the present embodiment includes a printer body 10, a printer rubber roll side assembly 20 fixed on the printer body 10, and a printhead side assembly 30 hinged on the printer body 10, specifically, the printhead side assembly 30 is hinged on the printer body 10 through a rotation shaft 40 (of course, in other embodiments, the printhead side assembly 30 may be hinged on the printer rubber roll side assembly 20). Specifically, the printer rubber roll side assembly 20 has a rubber roll 21, the print head sheet side assembly 30 has a print head sheet on which a heating unit 31 is provided; the arrangement of the glue roller 21 and the print head sheet is known in the art and will not be described in detail here.

Specifically, as shown in fig. 4, the printhead die side assembly 30 is located below the printer rubber roll side assembly 20, and the printhead die side assembly 30 is turned upward to cover the printer rubber roll side assembly 20, and after the covering, the covering is shown in fig. 6.

The axial direction of the rubber roller 21 of the rubber roller side assembly 20 of the printer is defined as a left-right direction, namely, a direction perpendicular to the paper surface is defined as a left-right direction as shown in fig. 4 and 6, the rubber roller side assembly 20 of the printer is also provided with two first clamping hooks 23 distributed along the left-right direction and positioning shaft sleeves 22 positioned at two sides of the rubber roller 21, namely, the two first clamping hooks 23 are distributed along the left-right direction; the two positioning shaft sleeves 22 are respectively arranged at the left side and the right side of the rubber roller 21 and are used for positioning the rubber roller 21; and both positioning bosses 22 are provided with a first positioning mating structure 24 (specifically, positioning bayonet 241 in this embodiment).

The print head side assembly 30 has two second hooks 33 and two second positioning matching structures 34 distributed along the left and right; that is, the two second hooks 33 are distributed along the left and right direction, and the two second positioning engaging structures 34 are also distributed along the left and right direction, in this embodiment, the second positioning engaging structures 34 are positioning protrusions 341.

The print head sheet side assembly 30 is covered on the printer rubber roll side assembly 20 and is hooked and fixed with the second hook 33 through the first hook 23 at the left side and the right side, so that the print head sheet side assembly 30 is covered and fixed with the printer rubber roll side assembly 20, and the first positioning matching structure 24 at the left side and the right side is matched with the second positioning matching structure 34, namely the positioning convex parts 341 at the left side and the right side are respectively inserted into the positioning bayonets 241 to form limit; in this way, the glue roller 21 and the head-sheet side assembly 30 can be limited in the paper-out direction (front-rear direction in fig. 6), and the glue roller 21 and the heat generating unit of the head sheet of the head-sheet side assembly 30 can be maintained in a tangential position.

The print head sheet side assembly 30 and the printer rubber roller side assembly 20 are covered and form a paper feeding channel therebetween, two groups of hooks (a first hook 23 and a second hook 33) fixed by hooking are positioned at the left side and the right side of the paper feeding channel, and two groups of matched positioning and matching structures (a first positioning and matching structure 24 and a second positioning and matching structure 34) are also positioned at the left side and the right side of the paper feeding channel, so that the running of paper is not hindered.

Meanwhile, the two groups of hooks are in left-right layout, after the two groups of hooks are covered and fixed, the gap difference between the left side and the right side of the printing head piece side assembly 30 and the printer rubber roller side assembly 20 can be well reduced, the abnormal conditions that the gap on one side is small and the gap on the other side is large are avoided, and the closing limit of the printing head piece side assembly 30 and the printer rubber roller side assembly 20 in the covering direction (namely the up-down direction) is realized; the positioning matching structure realizes the accurate limit of the rubber roll 21 and the printing head piece side assembly 30 in the paper outlet direction, and prevents the printing head piece side assembly 30 and the printer rubber roll side assembly 20 from generating offset in the paper outlet direction; thereby realizing the accurate closing positioning of the position of the heating unit of the printing head piece side assembly 30 and the tangential position of the outer diameter of the rubber roller 21 of the rubber roller side assembly 20; the positioning accuracy is high, and the structure is simple.

Further, in this embodiment, the first hook 23 is a movable hook, an elastic member 25 is disposed on the printer rubber roll side assembly 20, the elastic member 25 applies a force for holding the hook to the first hook 23, and a driving button 27 for driving the first hook 23 to unhook is further disposed on the outer side of the printer rubber roll side assembly 20. In the covering state, the first hook 23 and the second hook 33 keep a hooking state under the driving action of the elastic member 25, so as to fix the rubber roller side assembly 20 and the print head sheet side assembly 30 of the printer. When the separation is needed, the first clamping hook 23 is driven to be unhooked by the driving button 27, so that the separation is realized; the operation is simple.

Specifically, the printer rubber roll side assembly 20 is provided with a connecting shaft 26, and the first hooks 23 on the left and right sides are respectively and fixedly assembled at two ends of the connecting shaft 26, so that the first hooks 23 on the left and right sides can realize synchronous motion. The driving button 27 is provided with one and is matched with one of the first hooks 23, so that the structure can be simplified, and the operation is simpler and more convenient.

The driving button 27 includes an elastic pressing section 271 and an abutting section 272 with an inclined guiding edge 273, the outer end of the elastic pressing section 271 of the driving button 27 is fixed on the outer side edge of the printer rubber roll side assembly 20, and the inclined guiding edge 273 of the abutting section 272 abuts against the first hook 23. When the elastic pressing section 271 of the driving button 27 is pressed, the elastic pressing section 271 deforms and drives the abutting section 272 to act, and when the abutting section 272 moves, the first hook 23 is forced to be unhooked and rotated by the inclined guiding edge 273 until the first hook is unhooked from the second hook 33. When the external force is removed, the elastic pressing section 271 of the driving button 27 is deformed, and the first hook 23 is reset under the driving action of the elastic member 25. Has the characteristics of simple structure and convenient operation. Of course, in other embodiments, the structure of the driving button 27 is not limited thereto, or other manners are adopted to drive the first hook 23 to unhook.

The first hooks 23 on the left and right sides have the same structure, realize sharing, and reduce the types of parts. Of course, this may be different in other embodiments.

Specifically, the first hook 23 has a first support arm 231 and a second support arm 232, the first support arm 231 has a hook portion 233 for hooking and fixing with the second hook 33, and the inclined guiding edge 273 of the abutting section 272 abuts against the second support arm 232 of the first hook 23, so that the hook portion 233 of the first hook 23 can be abducted, and the overall structure of the layout is more reasonable. Of course, in other embodiments, the structure of the first hook 23 is not limited thereto.

The elastic member 25 is a torsion spring sleeved on the connecting shaft 26, one torsion arm of the torsion spring 25 is fixed on a fixing component of the printer rubber roll side assembly 20, and the other torsion arm is abutted on the first hook 23 so as to apply a torsion force for holding the hook to the first hook 23. Of course, in other embodiments, the elastic member 25 may be replaced by other elastic members such as tension springs, elastic sheets, etc.

Specifically, the second hook 33 is a fixed hook, and the second hook 33 and the second positioning matching structure 34 on the same side are formed on the same cover plate 32 of the printhead die side assembly 30, so that the number of parts can be reduced, and the integration level is better.

The above arrangement of the first hook 23 and the second hook 33 is one of the preferred embodiments of the present utility model, however, in other embodiments, the arrangement is not limited thereto, and for example, the first hook 23 may be a fixed hook and the second hook 33 may be a movable hook; or the first hook 23 and the second hook 33 are movable hooks.

The first positioning matching structure 24 is a positioning bayonet 241 formed on the positioning sleeve 22, the second positioning matching structure 34 is a positioning protrusion 341 formed by protruding, and when the printhead die side assembly 30 is covered on the printer rubber roll side assembly 20, the positioning protrusions 341 on the left and right sides are respectively inserted into the positioning bayonet 241 to form left and right limiting. Through the cooperation of inserting of location convex part 341 and location bayonet socket 241, can be fine carry out the spacing of left and right directions to printing head piece side subassembly 30, and simple structure realizes easily. Of course, in other embodiments, the structure of mating the first positioning mating structure 24 and the second positioning mating structure 34 is not limited thereto, such as the first positioning mating structure 24 being provided as a positioning protrusion and the second positioning mating structure 34 being provided as a positioning bayonet; or other mating structures may be used instead, etc.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A thermal printer comprises a printer body, a printer rubber roller side assembly fixed on the printer body, and a printing head piece side assembly hinged on the printer body or the printer rubber roller side assembly; the axial direction of the rubber roller side assembly of the definition printer is the left-right direction, and is characterized in that: the printer rubber roll side assembly is provided with two first clamping hooks distributed left and right and positioning shaft sleeves positioned on two sides of the rubber roll, and the two positioning shaft sleeves are provided with first positioning matching structures; the printing head sheet side assembly is provided with two second clamping hooks and two second positioning matching structures which are distributed along the left and right directions; the printing head piece side assembly covers the printer rubber roller side assembly and is hooked and fixed with the second hook through the first hook on the left side and the right side, and the first positioning matching structure on the left side and the right side is matched with the second positioning matching structure so that the rubber roller and the printing head piece side assembly form limit in the paper outlet direction.

2. A thermal printer according to claim 1, wherein: the printer rubber roll side assembly comprises a printer rubber roll side assembly, a first clamping hook and a second clamping hook, wherein the first clamping hook is a movable clamping hook, an elastic piece is arranged on the printer rubber roll side assembly, the elastic piece exerts a force for keeping the first clamping hook, and a driving button for driving the first clamping hook to unhook is further arranged on the outer side of the printer rubber roll side assembly.

3. A thermal printer according to claim 2, wherein: the printer rubber roll side subassembly is provided with a connecting axle, and the first trip of left and right sides is fixed assembly respectively at the both ends of connecting axle.

4. A thermal printer according to claim 3, wherein: the driving button is provided with one first clamping hook and is matched with one first clamping hook.

5. A thermal printer according to claim 3 or 4, wherein: the driving button comprises an elastic pressing section and an abutting section with an inclined guide edge, the outer end part of the elastic pressing section of the driving button is fixed on the outer side edge of the rubber roller side assembly of the printer, and the inclined guide edge of the abutting section abuts against the first clamping hook.

6. The thermal printer of claim 5, wherein: the first hook is provided with a first support arm and a second support arm, the first support arm is provided with a hook part for hooking and fixing the second hook, and the inclined guide edge of the abutting section abuts against the second support arm of the first hook.

7. A thermal printer according to claim 3, wherein: the elastic piece is a torsion spring sleeved on the connecting shaft, one torsion arm of the torsion spring is fixed on a fixed component of the printer rubber roll side component, and the other torsion arm is abutted on the first clamping hook so as to apply a force for keeping the first clamping hook.

8. A thermal printer according to claim 2, wherein: the second clamping hook is a fixed clamping hook, and the second clamping hook and the second positioning matching structure on the same side are formed on the same cover plate of the printing head sheet side assembly.

9. The thermal printer of claim 1 or 8, wherein: the first positioning matching structure is a positioning bayonet arranged on the positioning shaft sleeve, the second positioning matching structure is a positioning convex part arranged in a protruding mode, and when the printing head piece side assembly covers the printer rubber roller side assembly, the positioning convex parts on the left side and the right side are respectively inserted into the positioning bayonet to form left and right limiting.