CN111216461A

CN111216461A - Printing module and printing equipment

Info

Publication number: CN111216461A
Application number: CN202010129323.6A
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: CN212267035U; CN212289202U; CN111216457A; CN212289203U; CN212267036U

Abstract

The invention relates to a printing module, which is provided with a head unit and an impression unit, and is also provided with a metal bracket, wherein the metal bracket is fixedly arranged on a head frame in a detachable way and comprises a body and two outer blocking parts, the two outer blocking parts are respectively formed on the left side and the right side of the body in an integrated way and correspond to the outer blocking parts, the left side and the right side of the head frame are respectively provided with an inner blocking part, and the outer blocking parts and the corresponding inner blocking parts jointly form a positioning groove with an opening; the platen roller has a support part on each of left and right sides in a first direction, the support part being fitted into the positioning groove through an opening of the positioning groove to couple the platen roller to the metal holder such that power of a driving source disposed on the head frame is transmitted to the driving wheel; the invention also relates to a printing device for packaging the printing module. The scheme disclosed by the invention is more reasonable in layout and is convenient for later-stage maintenance of equipment.

Description

Printing 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.

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. When the positioning groove component is broken or broken, the whole fixing frame needs to be assembled, disassembled and replaced, and the replacement of the whole fixing frame is very troublesome and time-consuming;

disclosure of Invention

In order to meet the requirements of mechanical strength and overall lightness of the printing equipment during working or collision prevention, the invention provides the following technical scheme, which comprises the following steps: a print module includes:

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, and has a transmission wheel at one end in the 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;

the print module further includes: the metal bracket is fixedly arranged on the head frame in a detachable mode and comprises a body and two outer blocking parts, the two outer blocking parts are respectively and integrally formed on the left side and the right side of the body and correspond to the outer blocking parts, the left side and the right side of the head frame are respectively provided with an inner blocking part, and the outer blocking parts and the corresponding inner blocking parts form a positioning groove with an opening together;

the platen roller has a support portion on each of left and right sides in a first direction, the support portion being fitted into the positioning groove through an opening of the positioning groove to couple the platen roller to the metal holder, so that power of a driving source disposed on the head frame is transmitted to the driving wheel.

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.

Preferably, the second direction is perpendicular to the first direction.

Preferably, the thermal head is mounted on the head frame via a support frame and capable of swinging around a pivot shaft, the metal support has a connecting arm on each of left and right sides in the first direction, and the connecting arm is connected to the pivot shaft through a positioning shaft hole arranged at an end portion to form a mounting and positioning reference of the metal support.

Preferably, a photoelectric sensing assembly for detecting recording paper information is arranged on the body of the metal support, the photoelectric sensing assembly comprises a sensor, a sensor support plate and a mounting base, and the mounting base is clamped on the body.

Preferably, the metal bracket is an integral metal bracket formed by die casting.

Preferably, the left side and the right side of the head frame are respectively provided with a fixed seat formed integrally with the head frame, and the fixed seats are fixedly connected with the metal bracket through bolts.

Preferably, the support portion has a shaft hole penetrating in the first direction, and the rotary shaft of the platen roller passes through the shaft hole and is rotatable in the shaft hole.

Preferably, the embossing unit further comprises:

an elastic bracket which is supported on the stamping frame in a manner of rotating around the central axis of the stamping roller, and is provided with a transfer arm on the left side and the right side in the first direction respectively, and the transfer arm is provided with a shaft hole for the rotating shaft of the stamping roller to pass through;

the elastic support is provided with a swinging shaft in a penetrating way at a position far away from the switching arm, the outer blocking part of the metal support is provided with a limiting groove used for supporting the swinging shaft, and the limiting groove is provided with an opening for the swinging shaft to go in and out.

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 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.

3. The stamping device is supported on the stamping frame in a manner of rotating around the central axis of the stamping roller by adopting the elastic support, and the left side and the right side of the elastic support in the first direction are respectively provided with a transfer arm which is provided with a shaft hole for the rotating shaft of the stamping roller to pass through; the elastic support is far away from the switching arm and penetrates through a swinging shaft, the outer blocking part of the metal support is provided with a limiting groove used for supporting the swinging shaft, and the limiting groove is provided with an opening for the swinging shaft to go in and out, so that the printing equipment is more compact and exquisite when meeting the functional requirements and is convenient to carry.

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 depicts a component assembly schematic of the print module of the present invention.

Fig. 9 is a schematic drawing showing a disassembled structure of the head unit 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 perspective of the present invention.

Fig. 13 is a partially 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 small 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, 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, one end of the platen roller 14 in the first direction has a transmission wheel 12, and the transmission wheel 12 is in transmission connection with a driving source 24 on a head frame 28, and receives a force from the driving source 24 to rotate. In the present embodiment, the driving source 24 is drivingly connected to the transmission wheel 12 via a plurality of gears engaging with each other, and specifically, the number and size of the gears are determined as described in the transmission ratio and transmission distance between the driving source 24 and the transmission wheel 12. 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 limit groove 316 for supporting the swing shaft 17 is arranged on the outer baffle part 31 of the metal support 3, and the limit groove 316 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 16 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 supporting frame 22, the two sides of the front end of the supporting frame 22 are provided with the limiting rods 223, the rear end of the supporting 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 supporting frame and assembled on the head frame 28, the limiting rods 223 of the supporting 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 more conveniently pass through the shaft hole 2813 of the head frame after passing through the shaft hole of the connecting arm, and the assembly is easier, and the situation that the pivot shaft 222 cannot be installed in the head frame due to machining errors is avoided on the premise that the assembly accuracy of the shaft hole of the connecting arm and the pivot shaft 222 is ensured.

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 fig. 13, the head unit 2 has two protruding mounting

portions

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

portions

281 and 282 in the first direction, the metal holder 3 is mounted in the receiving space in a manner of being restricted from translating in the first direction, the receiving space has an opening through which the metal holder 3 is mounted in the receiving space, and the metal holder 3 is restricted from translating in the first direction in the receiving space, that is, it cannot translate in the first direction or can move only a small displacement. 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 includes:

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

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 and two outer blocking parts, the two outer blocking parts are respectively and integrally formed on the left side and the right side of the body and correspond to the outer blocking parts, the left side and the right side of the head frame are respectively provided with an inner blocking part, and the outer blocking parts and the corresponding inner blocking parts form a positioning groove with an opening together;

2. The print module assembly of claim 1, wherein the head frame defines a receiving space in the first direction, and the metal bracket is translationally fixed in the receiving space in the first direction.

3. The print module of claim 2, wherein the metal frame has a positioning recess extending in the second direction on each of 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.

4. A print module according to claim 3, wherein the second direction is perpendicular to the first direction.

5. The print module according to any one of claims 1 to 4, wherein the thermal head is mounted on the head frame via a support frame and is capable of swinging about a pivot shaft, and the metal holder has a connecting arm on each of left and right sides in the first direction, the connecting arm being connected to the pivot shaft through a positioning shaft hole provided at an end portion to constitute a mounting positioning reference of the metal holder.

6. The printing module according to claim 1, wherein a photoelectric sensing assembly for detecting information of recording paper is arranged on the body of the metal support, the photoelectric sensing assembly comprises a sensor, a sensor carrier plate and a mounting base, and the mounting base is clamped on the body.

7. The printing module of claim 1, wherein the metal frame is a die-cast, unitary metal frame.

8. The printing module of claim 1, wherein the left and right sides of the head frame each have a fixing seat integrally formed therewith, and the fixing seats are fastened to the metal bracket by bolts.

9. The print module of claim 1, wherein the support portion has a shaft hole extending therethrough in the first direction, and the platen roller has a shaft extending therethrough and rotatable therein.

10. The printing module of claim 1, wherein the stamping unit further comprises:

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