Continuous thermal transfer printer

Abstract

The utility model discloses a continuous thermal transfer printer, relates to the technical field of thermal transfer printing, and aims to solve the problems that the existing transmission system needs to realize power transmission through multi-stage gear speed reduction, belt tension pulley adjustment and the like, the assembly working hours are increased, and the overall stability is easily influenced by accumulative errors, and the continuous thermal transfer printer comprises a bottom plate, a blocking roller is arranged below one end of the bottom plate, a printing transmission mechanism is connected to the interior of the blocking roller, a feeding mechanism is connected to the side, close to the printing transmission mechanism, of the bottom plate, the feeding mechanism is used for winding and placing an ink ribbon, the printing transmission mechanism comprises a cam, and the cam is connected to the middle of the upper portion of the blocking roller. According to the printing transmission mechanism, the printing transmission structure is simple, the design is ingenious, the printing action is achieved through the rotation angle of the motor, the transmission structure is simplified to a great extent, the production and machining cost is reduced, and the number of accessories is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat transfer printing technical field especially relates to a continuous heat transfer printing machine. BACKGROUND

[0002] The heat transfer printer is widely used in the printing scene of label, barcode, bill and other fields, and its core function relies on the transmission mechanism to drive the print head to complete accurate horizontal displacement, and the transmission system of the traditional heat transfer printer adopts mechanical structures such as gear set, belt pulley or synchronous belt;

[0003] The existing transmission system needs to realize power transmission through multistage gear reduction, belt tensioning wheel adjustment and other modes, and the number of parts is large (usually more than 15), which leads to increased assembly time and the overall stability is easily affected by cumulative error, for example, the gear meshing gap needs to be repeatedly adjusted, and the assembly efficiency is low; the elastic sliding phenomenon exists in the belt transmission, and the gear transmission is affected by the gear side gap, so it is difficult to meet the high-precision printing demand (such as ±0.1mm level), especially in high-speed continuous printing, the transmission lag will cause the misplacement or blur of the printing content. SUMMARY

[0004] The continuous heat transfer printing machine solves the existing problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a continuous heat transfer printing machine, comprising a bottom plate, the middle lower part of the bottom plate is provided with a printing transmission mechanism, and the printing transmission mechanism comprises a cam, the cam is installed in the middle part of the bottom plate, and the bottom plate below the cam is provided with a groove, the inside of the groove is installed with a sliding plate, the top of the sliding plate is connected with the bottom plate through a tension spring, and the upper side of the sliding plate is provided with a bearing pulley, the bearing pulley is in contact with the cam, and the cam is connected with the output shaft of the servo motor, the rotation angle of the servo motor drives the cam to press down the bearing pulley, realizes the continuous reciprocating pressing down of the sliding plate, and the side of the sliding plate is installed with a print head.

[0006] Preferably, two blocking rollers are symmetrically connected on the upper end of the bottom plate, and blocking plates are installed on the both ends and the middle part of the upper side of the bottom plate.

[0007] Preferably, the bottom part of the sliding plate is slidably connected with the bottom plate through a straight line sliding rail, a connecting plate is connected to the outer side of the sliding plate, a T-shaped clamping plate is connected to one end of the connecting plate, and a supporting plate is connected to the other end of the connecting plate, and the print head is installed on the supporting plate through a print head bracket.

[0008] Preferably, the two tension springs are symmetrically arranged on the both sides of the cam.

[0009] Preferably, a proximity switch is installed between the bottom plate and the upper end of the sliding plate.

[0010] Preferably, the outer side of the bottom plate is provided with a feeding mechanism for winding the color band, and the feeding mechanism is internally through conveying the color band.

[0011] Preferably, the feeding mechanism comprises color band shafts, the color band shafts are provided with two, the two color band shafts are respectively symmetrically connected to the upper side of one side of the bottom plate, and the outer side of the color band shaft is close to the blocking roller.

[0012] Preferably, the feeding mechanism further comprises unwinding color band guide rollers, the unwinding color band guide rollers are also provided with two, the two unwinding color band guide rollers are respectively connected to the lower side of one side of the bottom plate, unwinding color band guide rollers are provided with winding color band guide rollers above, and the unwinding color band guide roller is connected with a tension hall element through a fixed plate at one end.

[0013] The beneficial effects of the present application are as follows: the cam bearing pulley is used to drive the printing head on the sliding plate to complete the printing work, the printing transmission structure is simple, the design is ingenious, the printing action is realized by the rotation angle of the motor, the transmission structure is greatly simplified, the production and processing cost is reduced, and the number of accessories is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a structural front view of the present application.

[0015] Fig. 2 It is a schematic view of the printing transmission mechanism of the present application.

[0016] Fig. 3 It is a color band path schematic view of the present application.

[0017] Marked numbers in the figure: 1, bottom plate; 101, blocking roller; 102, baffle; 2, printing transmission mechanism; 201, cam; 202, bearing pulley; 203, sliding plate; 204, tension spring; 205, servo motor; 206, connecting plate; 207, supporting plate; 3, feeding mechanism; 301, color band shaft; 302, unwinding color band guide roller; 303, winding color band guide roller; 304, tension hall element; 401, printing head; 402, printing head bracket; 5, color band; 6, proximity switch. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0019] REFERENCE Figs. 1-3The utility model provides a technical scheme: a continuous heat transfer printing machine, including bottom plate 1, the lower middle part of bottom plate 1 is provided with printing drive mechanism 2, and printing drive mechanism 2 includes cam 201, cam 201 is installed in the middle part of bottom plate 1, and the bottom plate 1 below cam 201 is provided with recess, recess is installed with sliding plate 203 in the inside, sliding plate 203 top is connected with bottom plate 1 through tension spring 204, and tension spring 204 is symmetrically distributed and is provided with two on the both sides of cam 201, and the upper side of sliding plate 203 is provided with bearing pulley 202, bearing pulley 202 contacts with cam 201, and cam 201 is connected with servo motor 205 output shaft, and the rotation angle of servo motor 205 drives cam 201 to press down bearing pulley 202, realizes the continuous reciprocating press down of sliding plate 203, and the one side of sliding plate 203 is installed with print head 401, and the bottom of sliding plate 203 is slidably connected with bottom plate 1 through linear slide rail (not shown in the drawing), and the outside of sliding plate 203 is connected with connecting plate 206, one end of connecting plate 206 is connected with T-shaped clamping plate, the other end of connecting plate 206 is connected with support plate 207, and print head 401 is installed on support plate 207 bottom through print head bracket 402;Proximity switch 6 is installed between bottom plate 1 and the upper end of sliding plate 203.

[0020] Specific implementation, the ribbon 5 is passed through print head 401 below, when starting printing, servo motor 205 is started through output shaft rotation and drives cam 201 to swing repeatedly (cam 201 only carries out the reciprocating rotation of small angle, not whole circle rotation), cam 201 swings and drives larger arc surface to press down bearing pulley 202, bearing pulley 202 moves downward, bearing pulley 202 moves and drives sliding plate 203 to move through T-shaped clamping plate, sliding plate 203 moves and cooperates the upper side of both sides to pull tension spring 204 and provides reverse tension to move reciprocatingly, pulls back sliding plate 203 to initial position, forms continuous periodic motion, sliding plate 203 moves and drives the upper side of connecting plate 206 to move up and down, one end of connecting plate 206 is connected with print head 401 through support plate 207, print head 401 follows connecting plate 206 and moves and completes transfer printing uninterruptedly downward, simultaneously, proximity switch 6 connected with the upper end of sliding plate 203 side carries out real-time detection and inducts the action completion of sliding plate 203 each time, guarantees the completion of print head 401 printing action.

[0021] Reference Fig. 3The bottom plate 1 is symmetrically connected with two blocking rollers 101 at both sides of the upper end of the bottom plate 1, and the bottom plate 1 is provided with a baffle 102 at both ends and the middle part of the upper end of the bottom plate 1; the outer side of the bottom plate 1 is provided with a feeding mechanism 3 for winding the color band, and the feeding mechanism 3 is internally penetrated by the color band 5, and the feeding mechanism 3 comprises a color band shaft 301, and the color band shaft 301 is provided with two color band shafts 301 which are symmetrically connected to the upper side of one side of the bottom plate 1, and the outer side of the color band shaft 301 is close to the blocking roller 101, and the feeding mechanism 3 further comprises a color band unwinding guide roller 302, and the color band unwinding guide roller 302 is also provided with two color band unwinding guide rollers 302 which are connected to the lower side of one side of the bottom plate 1, and the color band unwinding guide roller 302 is provided with a color band winding guide roller 303 in the upper side of the color band unwinding guide roller 302 in a spaced manner, and the color band unwinding guide roller 302 is connected with a tension Hall element 304 through a fixed plate at one end of the color band unwinding guide roller 302.

[0022] In the specific implementation, the personnel winds the color band 5 at both ends to the two color band shafts 301 (or directly installs the color band roll / disk on the color band shaft), and the two color band shafts 301 cooperate with each other to release and wind the color band 5, the middle part of the color band 5 is wound around the four color band unwinding guide rollers 302 and the color band winding guide rollers 303, the unused color band 5 is wound on one color band shaft 301 and is pulled downward to be wound around the color band winding guide roller 303 and the color band unwinding guide roller 302 in an S shape, passes below the print head 401, and is wound around the color band unwinding guide roller 302 and the color band winding guide roller 303 on the other side in an S shape again, and is wound on the other color band shaft 301, and when printing, the two color band shafts 301 start to rotate at the same time, and the two color band shafts 301 cooperate with each other to rotate to release the color band 5, and the length and time of the color band 5 released are monitored in real time by the Hall element 304 on one side.

[0023] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A continuous thermal transfer printer, comprising a base plate (1), characterized in that, A printing transmission mechanism (2) is provided in the lower middle part of the base plate (1), and the printing transmission mechanism (2) includes a cam (201). The cam (201) is installed in the middle of the base plate (1), and a groove is provided in the base plate (1) below the cam (201). A slide plate (203) is installed inside the groove. The top of the slide plate (203) is connected to the base plate (1) through a tension spring (204). A bearing pulley (202) is provided above the slide plate (203). The bearing pulley (202) is in contact with the cam (201), and the cam (201) is connected to the output shaft of the servo motor (205). By rotating the servo motor (205), the cam (201) is driven to press down the bearing pulley (202), so as to realize the continuous reciprocating pressing of the slide plate (203). At the same time, a print head (401) is installed on one side of the slide plate (203).

2. A continuous thermal transfer printer according to claim 1, characterized in that, Two guide rollers (101) are symmetrically connected on both sides of the upper end of the base plate (1), and baffles (102) are installed at both ends and the middle of the upper part of the base plate (1).

3. A continuous thermal transfer printer according to claim 1, characterized in that, The bottom of the slide plate (203) is slidably connected to the base plate (1) via a linear slide rail, and a connecting plate (206) is connected to the outside of the slide plate (203). One end of the connecting plate (206) is connected to a T-shaped card plate, and the other end of the connecting plate (206) is connected to a support plate (207). The bottom of the support plate (207) is equipped with a print head (401) via a print head bracket (402).

4. A continuous thermal transfer printer according to claim 1, characterized in that, The tension springs (204) are symmetrically distributed on both sides of the cam (201) with two springs.

5. A continuous thermal transfer printer according to claim 1, characterized in that, A proximity switch (6) is installed between the upper ends of the base plate (1) and the slide plate (203).

6. A continuous thermal transfer printer according to claim 1, characterized in that, The outer side of the base plate (1) is provided with a feeding mechanism (3) for winding the ribbon, and the ribbon (5) is conveyed through the inside of the feeding mechanism (3).

7. A continuous thermal transfer printer according to claim 6, characterized in that, The feeding mechanism (3) includes a ribbon shaft (301), and there are two ribbon shafts (301). The two ribbon shafts (301) are symmetrically connected to the upper side of the bottom plate (1), and the outer side of the ribbon shaft (301) is close to the guide roller (101).

8. A continuous thermal transfer printer according to claim 6, characterized in that, The feeding mechanism (3) also includes an unwinding ribbon guide roller (302), and there are two unwinding ribbon guide rollers (302). The two unwinding ribbon guide rollers (302) are respectively connected to the lower side of the base plate (1). A winding ribbon guide roller (303) is arranged at intervals above the unwinding ribbon guide roller (302), and a tension Hall element (304) is connected to one end of the unwinding ribbon guide roller (302) through a fixing plate.

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