CN111216457A

CN111216457A - Print stable print module and printing equipment

Info

Publication number: CN111216457A
Application number: CN202010130157.1A
Authority: CN
Inventors: 不公告发明人
Original assignee: Xiamen Hanyin Electronic Technology Co Ltd
Current assignee: Xiamen Hanyin Electronic Technology Co Ltd
Priority date: 2019-08-23
Filing date: 2020-02-28
Publication date: 2020-06-02
Also published as: CN212267036U; CN212289202U; CN212267035U; CN111216461A; CN212289203U

Abstract

The invention relates to a printing module with stable printing, which is provided with a head unit, an impression unit and a metal bracket, wherein the metal bracket is fixedly arranged on a head frame in a detachable mode and comprises a body, an outer blocking part and a connecting arm, the outer blocking part and the connecting arm are arranged on two sides of the body; the platen roller is installed in the positioning groove, the thermal head is rotatably connected with the connecting arm through a pivot shaft, and the outer blocking part and the connecting arm bear the force transmitted by printing paper in the printing process. The invention also relates to a printing device for packaging the printing module. The scheme disclosed by the invention can effectively improve the stability of the printing quality of the printer and prolong the service life of the printer.

Description

Print stable print module and printing equipment

Technical Field

The invention relates to the technical field of thermal printers, in particular to a printing module and printing equipment with stable printing.

Background

In a conventional thermal printer, a print module rotates a print roller with a recording paper sandwiched between the print roller and a thermal head, and heats a print surface of the recording paper by the thermal head while conveying the recording paper, thereby developing color on the print surface to perform printing. The printing roller is arranged on the compression roller mechanism, and the thermal printing mechanism is supported on a fixed frame of the printing module in a swinging mode. The fixed frame is provided with a positioning groove, and two ends of the printing roller can be clamped into the positioning groove to fix the printing roller.

The portable printer needs to be portable and is not too heavy. The existing fixed frame is integrally formed by plastic, and under the condition of working and non-working at ordinary times, the compression roller mechanism is supported on the fixed frame by being supported in the positioning groove, and when the printing module is collided, the components of the positioning groove are easy to break or break under the action of the force of the compression roller mechanism or other external forces. In the case where the positioning groove component is broken or broken, the entire fixing frame needs to be disassembled and replaced, which is very troublesome and time-consuming.

In addition, the printing head and the printing roller of the traditional printer are separately arranged on different units and then combined into a printing module, so that the fixed printing roller and the fixed part of the printing head are easy to generate fatigue deformation or damage due to the high-frequency stress transmitted by the fixed printing roller and the fixed printing roller.

Disclosure of Invention

In order to solve the problems of unstable work and short service life of the printing equipment, the invention provides the following technical scheme:

a print module that prints stably possesses:

a head unit including a thermal head and a head frame;

an imprint unit that includes an imprint roller and an imprint frame, and that is combined with the head unit in a separable manner;

the platen roller is supported by the platen frame so as to be rotatable in a first direction;

a platen roller that is disposed opposite to the thermal head and rotates with the recording paper sandwiched therebetween to feed out the recording paper;

characterized in that, the print module still possesses:

the metal bracket is fixedly arranged on the head frame in a detachable mode and comprises a body, an outer blocking part and a connecting arm, wherein the outer blocking part and the connecting arm are arranged on two sides of the body;

the platen roller is installed in the positioning groove, the thermal head is rotatably connected with the connecting arm through a pivot shaft, and the outer blocking part and the connecting arm bear the force transmitted by printing paper in the printing process.

Preferably, the head unit further comprises a support frame, the thermal head is arranged on the support frame, a pivot shaft is arranged at the rear end of the support frame, and a shaft hole for the pivot shaft to pass through is formed in the connecting arm.

Preferably, two sides of the front end of the support frame are provided with limit rods, and the corresponding position of the head frame is provided with an installation part allowing the limit rods to move in a specific range.

Preferably, an elastic member for making the thermal head closely contact with the printing paper is arranged between the support frame and the head frame.

Preferably, the end of the platen roller at one side in the first direction has a driving wheel, the head frame is provided with a driving source, and when the platen unit is mounted on the head unit, the driving source drives the driving wheel to rotate so as to rotate the platen roller.

Preferably, the platen roller has a support in the first direction, the support being fitted into the positioning groove through an opening of the positioning groove to couple the platen roller to the metal bracket, so that power of a driving source disposed on the head frame is transmitted to the driving wheel.

Preferably, the connecting arm and the head frame are provided with mounting holes at corresponding positions, the mounting hole of the head frame is in a kidney-shaped hole shape, and the diameter of the mounting hole is larger than that of the mounting hole of the connecting arm, so that the pivot shaft can conveniently penetrate through the mounting holes of the connecting arm and the head frame.

Preferably, the head frame is formed with an accommodating space in the first direction, and the metal bracket is installed in the accommodating space in the first direction in a manner of being restricted from translating.

Preferably, the metal bracket has a positioning concave portion extending in the second direction on each of left and right sides thereof, the metal bracket further has a positioning convex portion located outside the positioning concave portion, the positioning convex portion and the positioning concave portion are spaced apart from each other and form an engaging space, the head frame has an engaging portion detachably engaged in the engaging space, and a portion of the engaging portion is matched with the positioning concave portion.

The invention also provides printing equipment which comprises a shell and the printing module, wherein the printing module is arranged in the shell.

By adopting the technical scheme, the invention can obtain the following technical effects.

1. The invention provides a printing module, which comprises a metal bracket, wherein the metal bracket is fixedly arranged on a head frame in a detachable mode, a positioning groove consists of an outer blocking part arranged on the metal bracket and an inner blocking part arranged on the head frame, and when the outer blocking part is damaged by external force, printing equipment can be conveniently and quickly maintained by replacing the metal bracket. Meanwhile, the outer blocking part is mainly used for bearing the force transmitted by the printing roller in the working process and is often collided when the printing assembly is subjected to external collision, and the outer blocking part is arranged on one part of the metal support, so that the mechanical strength of the outer blocking part can be effectively improved, and the service life and the impact resistance of the printing device are improved.

2. The metal support is enabled to bear the force transmitted by the embossing roller and the thermal head at the same time, so that the acting force and the reacting force during printing can be well borne, the printing quality in the long-term printing process is further ensured, and the problem that the fixing piece of the embossing roller or the thermal head is fatigue-deformed or damaged due to long-term high-frequency stress is solved.

3. The invention can detachably fix the metal bracket and the head frame in an embedding way, and can ensure that the metal bracket is more stably fixed in the first direction and the second direction besides being convenient to disassemble and assemble, thereby ensuring the consistency of printing equipment in the long-term printing process.

Drawings

FIG. 1 depicts a perspective view of a print module of the present invention.

Fig. 2 depicts a disassembled structural schematic of the print module of the present invention.

Fig. 3 depicts a perspective view of the embossing unit of the present invention.

Fig. 4 depicts a schematic exploded view of the embossing unit of the present invention.

Fig. 5 depicts a perspective view of the head unit of the present invention.

3 fig. 3 6 3 is 3 a 3 sectional 3 view 3 of 3 the 3 head 3 unit 3 of 3 the 3 present 3 invention 3 taken 3 along 3 the 3 direction 3 of 3 a 3- 3 a 3. 3

Fig. 7 is a drawing showing a head unit disassembled structure of the present invention.

FIG. 8 is a diagram illustrating forces applied to a print module of the present invention during printing.

Fig. 9 depicts a disassembled structural schematic view of the head unit main frame of the present invention.

Fig. 10 depicts a perspective view of a metal stent of the present invention.

FIG. 11 depicts an enlarged view of a portion of the metal stent of the present invention.

FIG. 12 depicts a head frame isometric view of the present invention

FIG. 13 is a partial enlarged view of the head frame of the present invention

Attached figure main label

1. An imprint unit; 11. an impression frame; 12. a transmission gear; 13. an elastic support; 14. a platen roller; 16. an elastic member; 17. a swing shaft; 18. a support portion; 2. a head unit; 21. a mounting frame; 22. a support frame; 28. a head frame; 3. a metal bracket; 41. positioning a groove; 51. a sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "upper", "lower", "upper section", "lower section", "upper side", "lower side", "middle", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations and positional relationships indicated based on the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

The first direction in the present invention is the X direction and the-X direction in the drawing, the second direction is the Y direction and the-Y direction in the drawing, and the third direction is the Z direction and the-Z direction in the drawing.

The structure and function of the solution of the present application will now be described in detail with reference to fig. 1 to 13.

As shown in fig. 1 and 2, the present invention provides a printing module, which includes a stamping unit 1, a head unit 2 and a metal bracket 3, wherein the stamping unit 1 and the head unit 2 are assembled and installed in a separable manner. The head unit 2 includes a thermal head 221, a head frame 28, and a driving source 24 for driving the platen roller to rotate, and the driving source 24 is preferably a motor. As shown in fig. 3 and 4, the platen unit 1 includes a platen frame 11, and a platen roller 14 and an elastic holder 13 provided on the platen frame 11, and as shown in fig. 4, the platen roller 14 is supported by the platen frame 11 so as to be rotatable in a first direction X, and one end of the platen roller 14 in the first direction has a transmission wheel 12, and the transmission wheel 12 is connected to a drive source 24 on a head frame 28, and receives a force from the drive source 24 so as to rotate. The platen roller 14 is disposed opposite the thermal head 22, and rotates with the recording paper sandwiched therebetween to feed out the recording paper.

As shown in fig. 4, the elastic bracket 13 has a transfer arm 132 on each of the left and right sides in the first direction, the transfer arm 132 has a shaft hole or a relief portion through which the rotating shaft of the platen roller 14 passes, and the elastic bracket 13 is assembled with the platen roller 14 through the shaft hole or the relief portion; the elastic support 13 is supported and mounted on the platen frame so as to be rotatable about the center axis of the platen roller 14. A swing shaft 17 is arranged on the elastic support 13 far away from the adapting arm 132, a limiting groove 3 for supporting the swing shaft 17 is arranged on the outer blocking part 31 of the metal support 3, and the limiting groove 3 is provided with an opening for the swing shaft 17 to go in and out. The platen frame 11 is provided with an arc-shaped groove 111 through which the swing shaft 17 passes, and the swing shaft 17 is movable in the arc-shaped groove 111 of the platen frame 11. An elastic piece 16 is arranged between the stamping frame 11 and the elastic support 13, and mounting parts for mounting the elastic piece are arranged on the stamping frame 11 and the elastic support 13.

As shown in fig. 4, the platen roller 14 has a support portion 18 on each of the left and right sides in the first direction X, the support portion 18 has a shaft hole penetrating in the first direction X, the rotating shaft of the platen roller 14 passes through the shaft hole and is rotatable in the shaft hole, and the support portion 18 is fitted into the positioning groove 41 via the opening of the positioning groove 41 to couple the platen roller 14 to the metal holder 3. The support portion 18 may be a member having a different shape that satisfies the functional requirements described above; the platen roller 14 may be integrally formed as a part of the platen roller.

As shown in fig. 5, a photoelectric sensing assembly 51 for detecting recording paper information is disposed on the body 32 of the metal bracket 3, the photoelectric sensing assembly 51 includes a sensor, a sensor carrier plate and a mounting base, and the mounting base is clamped on the body 32. The photoelectric sensing unit 51 is used to detect the condition information of the printing paper, such as the presence or absence of the printing paper, or different positions of the printing paper.

As shown in fig. 6 and 7, the thermal head 221 is mounted on the support frame 22, the two sides of the front end of the support frame 22 are provided with the limiting rods 223, the rear end of the support frame is provided with the mounting holes for mounting the pivot shaft 222, the pivot shaft 222 is mounted in the mounting holes of the support frame and assembled on the head frame 28, the limiting rods 223 of the support frame 22 are mounted in the grooves 2814 of the head frame 28, and the limiting rods 223 can swing around the pivot shaft 222 in the grooves 2814, and the swing range is determined by the size of the grooves 2814 and can be selected according to actual needs. The support frame 22 is mounted on the head frame in a manner of swinging around a pivot shaft 222, and an elastic member (not shown in the drawings) is disposed between the front end of the support frame 22 and the head frame, wherein the elastic member is preferably a spring for keeping a certain pre-tension of the thermal head during printing so as to enable the thermal head to be tightly attached to the printing paper. The thermal head 221 is fixed to the head frame 28 so as to be swingable around the pivot shaft 222. The pivot shaft 222 passes through the shaft hole of the connecting arm 314 of the metal bracket 3 and the shaft hole 2813 of the head frame 28, and the shaft hole 2813 is a hole with a shape similar to a kidney-shaped hole or a kidney-shaped hole, such as an oval hole. As shown in fig. 7 and 13, in the present invention, the pivot shaft 222 passes through the connecting arm 314 and the shaft hole 2813 of the head frame 28, and the diameter of the shaft hole 2813 of the head frame is larger than that of the shaft hole 2813 of the connecting arm 314, so that the pivot shaft 222 can pass through the shaft hole 2813 of the head frame more conveniently after passing through the shaft hole of the connecting arm 314, the assembly is easier, and the over-fitting condition is avoided.

As shown in fig. 8, the platen roller 14 is limited by the limiting portion 311 of the metal bracket 3, and the supporting frame 22 with the thermal head is rotatably pivoted on the connecting arm 314 of the metal bracket 3, when the printing assembly prints, printing paper is clamped between the thermal head 221 and the platen roller 14, and an acting force F1 and a reaction force F2 transmitted by the printing paper during printing are respectively transmitted to the stressed portion 311 and the connecting arm 314 of the metal bracket 3, so that the acting force and the reaction force during printing are borne by the metal bracket, and further, the printing quality is prevented from being affected by fatigue damage generated when plastic parts are frequently stressed.

As shown in fig. 10 and 11, the metal bracket 3 is an integral metal bracket formed by die casting, the metal bracket 3 is detachably and fixedly mounted on the head frame 28, the left and right sides of the head frame 28 are respectively provided with integrally formed fixing

seats

281 and 282, the fixing

seats

281 and 282 are provided with bolt mounting portions 2811, and the head frame 28 is fastened and connected with the metal bracket 3 through the bolt mounting portions 2811 by bolts. The metal bracket 3 comprises a body 32 and two outer blocking parts 31, the two outer blocking parts 31 are respectively formed on the left and right sides of the body 32 in an integrated manner, corresponding to the outer blocking parts 31, the left and right sides of the head frame 28 are respectively provided with an inner blocking part 281, and the outer blocking part 31 and the corresponding inner blocking part 281 together form a positioning groove 41 with an opening; the metal bracket 3 has a connecting arm 314 on each of the left and right sides in the first direction X, and the connecting arm 314 is provided with a shaft hole for mounting the pivot shaft 222.

As shown in fig. 9, the head unit 2 includes a head frame 28 and a mounting frame 21 assembled with the head frame 28, a cutter mounting space is formed in front of the mounting frame 21 and the head frame 28, two ends of the mounting frame 21 are bent to form bent portions 211, the bottom of the mounting frame 21 is bent to form a clamping portion 212, and mounting spaces of the driving gear set 26 of the cutter and the embossing roller gear set 23 are formed in the two bent portions 211 and two sides of the head frame 28; the clamping part 212 is positioned in the accommodating space of the head frame 28 to form a cutter motor 25 mounting space and a driving motor 24 mounting space of the platen roller with the head frame 28. The metal bracket 3 is detachably provided on the head frame 28. As shown in fig. 12 and 13, the head unit 2 has protruding mounting

portions

281 and 282 on both sides of the head frame 28, and a receiving space is formed between the mounting

portions

281 and 282 in the first direction, and the metal bracket 3 is translationally restrained in the receiving space in the first direction. As shown in fig. 13, the mounting portion 281 is further provided with a fitting portion 2812 and a mounting groove 2815 which is fitted to the convex portion of the metal holder 3. As shown in fig. 10 and 11, the metal holder 3 has positioning concave portions 313 extending in the second direction Y on both left and right sides thereof, the metal holder 3 further has positioning convex portions 315 located outside the positioning concave portions 313, the positioning convex portions 315 and the positioning concave portions 313 are spaced apart from each other to form a fitting space, the head frame 28 has a fitting portion 2812 detachably fitted in the fitting space, and a part or all of the fitting portion 2812 is fitted in the positioning concave portions 313. In the present invention, in a preferred embodiment, the second direction is perpendicular to the first direction.

The present invention further provides a printing apparatus, which is specifically a portable printing apparatus (not shown), comprising the printing module and a housing, wherein the printing module is disposed and fixed in the housing.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A print module that prints stably possesses:

a head unit including a thermal head and a head frame;

characterized in that, the print module still possesses:

2. The printing module of claim 1, wherein the head unit further comprises a support frame, the thermal head is disposed on the support frame, the pivot shaft is disposed at a rear end of the support frame, and the connecting arm is provided with a shaft hole for the pivot shaft to pass through.

3. The printing module of claim 2, wherein the support frame is provided with a stop bar at two sides of a front end thereof, and the head frame is provided with a mounting portion at a corresponding position thereof for allowing the stop bar to swing.

4. The print module as claimed in claim 3, wherein an elastic member is provided between the support frame and the head frame for urging the thermal head against the printing paper.

5. The print module of claim 1, wherein the platen roller has a driving wheel at one end in the first direction, and a driving source is provided on the head frame, and when the platen unit is mounted on the head unit, the driving source rotates the driving wheel to rotate the platen roller.

6. A print-stable print module according to claim 5, wherein the platen roller has a support in the first direction that fits into the detent via its opening to couple the platen roller to the metal support, so that power from a drive source disposed on the head frame is transmitted to the drive wheel.

7. The print module of claim 1, wherein the connecting arm and the head frame are provided with through holes at corresponding positions, and the through holes of the head frame are waist-shaped holes with a diameter larger than that of the through holes of the connecting arm, so that the pivot shaft can more conveniently pass through the through holes of the connecting arm and the head frame.

8. The print module of claim 1, wherein the head frame defines a receiving space in a first direction, and the metal support is mounted in the receiving space in a translation-limited manner in the first direction.

9. The print module of claim 8, wherein the metal frame has a positioning recess extending in the second direction on each of the left and right sides thereof, the metal frame further has a positioning protrusion located outside the positioning recess, the positioning protrusion and the positioning recess are spaced apart from each other to form a fitting space, the head frame has a fitting portion detachably fitted in the fitting space, and a portion of the fitting portion is matched with the positioning recess.

10. A printing apparatus comprising a housing, and further comprising a print module according to any of claims 1 to 9, said print module being disposed in said housing.