CN220314524U - Double-end thermal printer - Google Patents

Abstract

The utility model discloses a double-head thermal printer, which relates to the field of thermal printers, and aims at solving the problems that the existing single-head thermal printer can only print in a single temperature zone and has low paper utilization rate, the utility model provides a scheme that the double-head thermal printer comprises a first printing head and a second printing head, wherein the first printing head and the second printing head are respectively attached and provided with a first guard board and a second guard board which are used for being connected with a printer shell, and paper pressing mechanisms are arranged between two ends of the first guard board and the second guard board: the novel rolling device comprises a connecting rod, a support and a rolling shaft, wherein first grooves are formed in two ends of the connecting rod, second grooves are formed in the middle of the connecting rod, and two groups of connecting rods are parallel to each other. The two printing heads can independently set the printing temperature, and the problem that the existing single-head thermal printer can only print in a single temperature zone is effectively solved.

Description

Double-end thermal printer

Technical Field

The utility model relates to the field of thermal printers, in particular to a double-head thermal printer.

Background

The thermal printer is applied in the field of bill printing, the thermal printer and thermal printing paper on the market are generally single-sided printing, and a single thermal printing head is arranged in the printer, however, the single-sided printing has very low utilization rate to paper, does not accord with the concept of environmental protection paper, and the existing single-sided thermal printer can only print in a single temperature zone and has low utilization rate to paper, so in order to optimize the problems, a double-sided thermal printer capable of using double-sided thermal printing paper is provided.

Disclosure of Invention

The double-head thermal printer solves the problems that the existing single-head thermal printer can only print in a single temperature zone and has low paper utilization rate.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a double-end thermal printer, includes first printer head and second printer head, first printer head and second printer head laminating respectively install first backplate and the second backplate that are used for being connected with the printer shell, just all be provided with paper pressing mechanism between the both ends of first backplate and the second backplate: including connecting rod, support and roll extrusion axle, first recess has all been seted up at the both ends of connecting rod, just the second recess has been seted up at the middle part of connecting rod, two sets of be parallel to each other between the connecting rod, just the printing face of first print head and second print head all is provided with the roll extrusion axle, two sets of the roll extrusion axle is parallel to each other, just the minor axis at roll extrusion axle both ends is rotated with the connecting rod and is connected, be provided with round pin in the second recess, and every group the connecting rod is connected with two sets of supports through round pin rotation, two sets of the both ends that the support kept away from each other are respectively to first backplate and second backplate fixed connection after bending to opposite direction, and one of them a set of the peg has the extension spring between the minor axis at roll extrusion axle both ends and the second backplate.

Preferably, the first guard plate and the second guard plate are made of stainless steel by metal stamping.

Preferably, the printing surfaces of the first printing head and the second printing head are parallel to each other, the printing surfaces of the first printing head and the second printing head face opposite to each other, and a paper feeding gap of the thermal paper is arranged between the printing planes of the first printing head and the second printing head.

Preferably, the two ends of the second guard plate are stamped with hanging grooves through U-shaped punches, and one end of the tension spring is connected with the hanging grooves in a hanging mode.

Preferably, the short shaft is positioned in the first groove and is provided with an annular groove, the cross section of the annular groove is in a V shape, and the other end of the tension spring is connected with the short shaft in a hanging mode through the first groove and the annular groove.

Preferably, the rolling shaft is of a steel core rubber sleeve structure.

Preferably, two positioning pins are arranged between the first guard plate and the second guard plate and the corresponding support.

Preferably, nuts are arranged at the folded corners of the brackets, screws penetrate through the first guard plate, the second guard plate and the brackets corresponding to the first guard plate, and the screws are fastened with the nuts.

Preferably, the nut is a square nut.

Preferably, the two tension springs are parallel to each other.

The beneficial effects of the utility model are as follows:

1. different from a single thermal printing head on the market, the device is provided with a first printing head and a second printing head, the printing surfaces of the first printing head and the second printing head are parallel to each other, the surfaces of the first printing head and the second printing head face opposite to each other, and a paper feeding gap of thermal paper is arranged between a first guard plate and a second guard plate of the device;

2. the device is through printing the double-colored thermal paper, and the double-colored printing head can independently set up respectively and print the temperature, and the low temperature prints the color pattern (red, yellow, blue, green, purple etc. colour), and the high temperature prints black pattern, and the device effectually has solved current single-head thermal printer and has only single temperature print thermal paper and lead to printing the single problem of colour.

In conclusion, the device effectively solves the problems that the existing single-head thermal printer can only print single-sided thermal paper, the paper utilization rate is low, and the single-head thermal printer only prints thermal paper at a single temperature.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic view of the structure of the present utility model after the thermal paper is removed in fig. 1.

Fig. 3 is a schematic side view of the structure of fig. 2 according to the present utility model.

Fig. 4 is an enlarged view of the structure of fig. 1 a according to the present utility model.

Fig. 5 is a cross-sectional view of the structure of fig. 4 in accordance with the present utility model.

Reference numerals in the drawings: 1. a first printhead; 101. a first guard plate; 2. a second print head; 201. a second guard plate; 202. a hanging groove; 203. a tension spring; 3. a connecting rod; 301. a first groove; 302. a second groove; 4. a bracket; 401. a nut; 402. a positioning pin; 5. rolling the shaft; 501. a short shaft; 502. an annular groove; 6. thermal paper.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-5, a dual-head thermal printer includes a first print head 1 and a second print head 2, wherein the first print head 1 and the second print head 2 are respectively attached to a first guard plate 101 and a second guard plate 201 which are connected with a printer housing, and paper pressing mechanisms are respectively arranged between two ends of the first guard plate 101 and the second guard plate 201.

Specifically, the first guard plate 101 and the second guard plate 201 are made of stainless steel by stamping, and the rolling shaft 5 is of a steel core rubber sleeve structure.

Referring to fig. 5, two ends of the second guard plate 201 are stamped with hanging grooves 202 through a U-shaped punch, one end of a tension spring 203 is hung with the hanging grooves 202, a short shaft 501 is positioned in the first groove 301 and provided with an annular groove 502, the cross section of the annular groove 502 is in a V-shaped configuration, the other end of the tension spring 203 is hung with the short shaft 501 through the first groove 301 and the annular groove 502, the two tension springs 203 are parallel to each other, and proper rolling force of the rolling shaft 5 on the thermal paper 6 is maintained through the tension spring 203.

Referring to fig. 5, two positioning pins 402 are disposed between the first guard plate 101, the second guard plate 201 and the corresponding support 4, nuts 401 are disposed at the folded corners of the support 4, screws penetrate between the first guard plate 101, the second guard plate 201 and the corresponding support 4, the screws are fastened with the nuts 401, and the nuts 401 are square nuts so as to maintain correct angles and positions when the support 4 is assembled.

The device solves the working principle that the existing single-head thermal printer can only print single-sided thermal paper, which results in lower paper utilization rate: referring to fig. 2 and 1, unlike the single thermal print head on the market, the device designs the first print head 1 and the second print head 2 with printing surfaces parallel to each other and opposite to each other and provided with a paper feeding gap for thermal paper 6, and the device is fixedly connected with a shell through a first guard plate 101 and a second guard plate 201, and hinges a connecting rod 3 and two groups of guard plates through a bracket 4, so that the connecting rod 3 can deflect relative to the double print heads within a certain angle, and rolling shafts 5 at two ends of the connecting rod 3 roll the thermal paper 6 under the control of a tension spring 203, so that the two sides of the thermal paper 6 respectively fit with the first print head 1 and the second print head 2 when in paper feeding to realize double-sided thermal printing;

the concrete structure is including connecting rod 3, support 4 and roll extrusion axle 5, first recess 301 has all been seted up at the both ends of connecting rod 3, and the second recess 302 has been seted up at the middle part of connecting rod 3, be parallel to each other between two sets of connecting rods 3, and the printing face of first printing head 1 and second printing head 2 all is provided with roll extrusion axle 5, two sets of roll extrusion axles 5 are parallel to each other, and the minor axis 501 at roll extrusion axle 5 both ends is rotated with connecting rod 3 and is connected, be provided with the round pin in the second recess 302, and every group of connecting rod 3 is rotated through the round pin and is connected with two sets of supports 4, the both ends that two sets of supports 4 kept away from each other are respectively to opposite direction after bending with first backplate 101 and second backplate 201 fixed connection, and the extension spring 203 has been hung between the minor axis 501 at a set of roll extrusion axle 5 both ends and the second backplate 201.

The device solves the working principle that the existing single-head thermal printer can only print in single color: the device is mainly used for printing double-color thermal paper, the double printing heads can respectively set printing temperatures, the low-temperature printing heads print color patterns (red, yellow, blue, green, purple and other colors), and the high-temperature printing heads print black patterns, so that the problem that the existing single-head thermal printer only prints the thermal paper at a single temperature to cause single printing color is effectively solved.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (10)

1. The utility model provides a double-end thermal printer, includes first print head (1) and second print head (2), its characterized in that, first print head (1) and second print head (2) laminating respectively install first backplate (101) and second backplate (201) that are used for being connected with the printer shell, just all be provided with paper pressing mechanism between the both ends of first backplate (101) and second backplate (201): including connecting rod (3), support (4) and roll extrusion axle (5), first recess (301) have all been seted up at the both ends of connecting rod (3), just second recess (302) have been seted up at the middle part of connecting rod (3), two sets of between connecting rod (3) parallel to each other, just print the face of first print head (1) and second print head (2) all is provided with roll extrusion axle (5), two sets of roll extrusion axle (5) parallel to each other, just minor axis (501) at roll extrusion axle (5) both ends are rotated with connecting rod (3) and are connected, be provided with the round pin in second recess (302), and every group connecting rod (3) are rotated through the round pin and are connected with two sets of supports (4), two sets of after the both ends that support (4) keep away from each other are bent to opposite direction respectively with first backplate (101) and second backplate (201) fixed connection, and wherein a set of peg (501) at roll extrusion axle (5) both ends have extension spring (203) with the second backplate between (201).

2. The dual head thermal printer of claim 1 wherein the first guard (101) and the second guard (201) are stamped and fabricated from stainless steel metal.

3. A dual-head thermal printer according to claim 1, wherein the printing surfaces of the first printing head (1) and the second printing head (2) are parallel to each other, the printing surfaces of the first printing head (1) and the second printing head (2) face opposite to each other, and a paper feeding gap of thermal paper (6) is arranged between the printing planes of the first printing head (1) and the second printing head (2).

4. The double-head thermal printer according to claim 1, wherein the hanging groove (202) is punched at two ends of the second guard plate (201) through a U-shaped punch, and one end of the tension spring (203) is hung with the hanging groove (202).

5. The double-head thermal printer according to claim 4, wherein the short shaft (501) is provided with an annular groove (502) in the first groove (301), the cross section of the annular groove (502) is in a V-shaped configuration, and the other end of the tension spring (203) is connected with the short shaft (501) in a hanging mode through the first groove (301) and the annular groove (502).

6. A dual head thermal printer according to claim 1, wherein the roll spindle (5) is of steel core sleeve construction.

7. The dual-head thermal printer according to claim 1, wherein two positioning pins (402) are arranged between the first guard plate (101) and the second guard plate (201) and the corresponding bracket (4).

8. The double-head thermal printer according to claim 7, wherein nuts (401) are arranged at the folded corners of the brackets (4), screws penetrate between the first guard plate (101) and the second guard plate (201) and the corresponding brackets (4), and the screws are fastened with the nuts (401).

9. A dual head thermal printer according to claim 8, wherein the nut (401) is a square nut.

10. A dual head thermal printer according to claim 1, wherein two of said tension springs (203) are parallel to each other.