Label printing device

Abstract

A label printing device comprises: a print head assembly (1), an upper cantilever beam mounted on a side wall (3), and a print head assembly side wall mounting portion (4) mounted on the upper cantilever beam, a rubber roller assembly (2) with one end mounted on the side wall, and a rubber roller assembly side wall mounting portion (5) connected to the other end of the rubber roller assembly (2), and a connecting portion (6) between the print head assembly side wall mounting portion (4) and the rubber roller assembly side wall mounting portion (5) for connecting the two structures together, and a through passage (7) for replacing consumables. The implementation of the label printing device provided by the present invention can well solve the problems existing in the prior art, not only the overall structure of the printer is stable, but also the consumables are very convenient to install and disassemble.

Description

Technical Field

[0001] The present invention relates to the technical field of label printing, and in particular to a label printing device that can be used for industrial label printing equipment. Background Art

[0002] Industrial label printers include direct thermal label printers and thermal transfer label printers. When a thermal transfer label printer is working, the thermal print head heats the carbon ribbon attached to the printing medium (which can be ordinary paper or polymer paper). The ink coating on the thermal transfer carbon ribbon will melt due to the heating of the print head and will be separated from the carbon ribbon base film under the pressure of the print head and transferred to the printing medium, thereby displaying the content to be printed. When a direct thermal label printer is working, the thermal print head heats the printing medium with a thermal coating to make the thermal coating color and display the content to be printed. Industrial label printers generally use metal structures, and the movement module is its core component. The quality of the movement module directly affects the printing accuracy and reliability, and is the most important component of the overall stability and durability of the printer. Whether it is direct thermal or thermal transfer printing, the heat of the heating element on the print head must be transferred to the printing consumables to complete the printing action. The heat transfer method is heat conduction, which requires the print head to press the printing consumables tightly against the rubber roller. According to the technical specifications given by the print head manufacturer, the clamping force is approximately: the pressure of the print head on the rubber roller can be 3N / cm. Therefore, the relative position of the print line on the print head and the rubber roller involved in the print head assembly is very important. If there is a deviation or misalignment, it will cause unclear printing and ribbon wrinkling and other faults.

[0003] The movement structure of the prior art is divided into integrated and semi-split types. If all the movement components are fixed as a whole, an integrated movement structure is formed; if the upper and lower parts of the movement module are only fixedly connected by one side wall (left side wall), and there is no fixed connection on the other side wall (right side wall), it is divided into upper and lower parts, and the components constituting the movement module are respectively installed on the left side wall, then a semi-split movement structure is formed. Among them, the integrated movement has guaranteed precision and stable structure, but it is inconvenient to install and disassemble consumables; semi-split movement: the precision is difficult to guarantee, the structural stability is poor, but the consumables are easy to install and disassemble. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a label printer for the above-mentioned defects of the prior art, which can facilitate the replacement of consumables while overcoming the defects of easy deformation, which affects the printing effect and causes wrinkles of the carbon ribbon.

[0005] A label printing device provided in accordance with the present invention includes: a print head assembly, an upper cantilever beam mounted on a side wall, and a side wall mounting portion of the print head assembly mounted on the upper cantilever beam, a rubber roller assembly with one end mounted on the side wall, and a side wall mounting portion of the rubber roller assembly connected to the other end of the rubber roller assembly, a connecting portion between the side wall mounting portion of the print head assembly and the side wall mounting portion of the rubber roller assembly for connecting the two structures together, and a crossing channel for replacing consumables, the side wall mounting portion of the rubber roller assembly is provided with a rubber roller mounting bearing near the connecting portion, the rubber roller assembly includes a rubber roller rotatably mounted between the side wall and the side wall mounting portion of the rubber roller assembly through a bearing on the side wall and the rubber roller mounting bearing on the side wall mounting portion of the rubber roller assembly, one end of the print head assembly is fixed to the side wall, and the other end is fixed to the side wall mounting portion of the print head assembly.

[0006] In the above-mentioned label printing device of the present invention, the side wall mounting portion of the print head assembly and the side wall mounting portion of the rubber roller assembly are respectively used to install the print head assembly and the rubber roller assembly on the side wall in sequence, and the connecting portion and the side wall mounting portion of the print head assembly and the side wall mounting portion of the rubber roller assembly are an integrated structure, wherein the connecting portion is used to ensure that the print head assembly and the rubber roller assembly are rigidly connected, the adjacent width of the connecting portion and the side wall mounting portion of the print head assembly is smaller than the width of the side wall mounting portion of the print head assembly, and the adjacent width of the connecting portion and the side wall mounting portion of the rubber roller assembly is smaller than the width of the side wall mounting portion of the rubber roller assembly, thereby forming a crossing channel therebetween.

[0007] In the above-mentioned label printing device of the present invention, the width of the crossing channel is greater than the adjacent width between the connecting portion and the side wall mounting portion of the rubber roller assembly, and the width of the crossing channel is greater than the adjacent width between the connecting portion and the side wall mounting portion of the print head assembly.

[0008] In the above-mentioned label printing device of the present invention, the connecting part includes a connecting plate, the width of the connecting plate is smaller than the width of the upper side wall and the lower side wall, and the mounting part and the mounting part are fixedly connected by the connecting plate to form a whole including a crossing channel.

[0009] In the above-mentioned label printing device of the present invention, the passing channel is provided with an openable and closable flexible dust shielding device, including a plastic upper cover and a plastic lower cover respectively installed on the lower edge of the mounting part so that consumables can pass therethrough.

[0010] In the above-mentioned label printing device of the present invention, the print head assembly also includes: a print head support shaft installed between the side wall and the side wall mounting portion of the print head assembly, a print head support rotatable on the print head support shaft, and a print head installed on the print head support for controlled heating / pressure on the printing consumables in the direction of the rubber roller.

[0011] The label printing device of the present invention further includes a bottom paper tensioning mechanism for automatic paper peeling, wherein the bottom paper tensioning mechanism includes a peeling sheet, which is used to form a peeling angle between the bottom paper and the paper output direction of the printer so that when the bottom paper is tensioned during the paper output process, the surface paper with adhesive backing is peeled off; a paper peeling rubber roller, which is used to drive and tension the bottom paper; a bottom paper pressing roller, which is used to press the bottom paper on the paper peeling rubber roller to generate friction; a hook mechanism, both ends of which are rotatably mounted on the side wall and the side wall mounting part of the rubber roller assembly; a bottom paper pressing roller bracket, which is used to install the bottom paper pressing roller and apply pressure to the pressing roller; the two ends of one side of the bottom paper pressing roller bracket are respectively rotatably fixed on the side wall and the side wall mounting part of the rubber roller assembly, and the other side of the bottom paper pressing roller bracket is locked or released by the hook mechanism.

[0012] The implementation of the label printing device provided by the present invention can well solve the problems existing in the prior art. Since the print head assembly and the rubber roller assembly are respectively installed on the side wall through the print head assembly side wall mounting portion and the rubber roller assembly side wall mounting portion in sequence, and a connecting portion that integrates the two and a through channel for replacing consumables are arranged between the print head assembly side wall mounting portion and the rubber roller assembly side wall mounting portion, the replacement of consumables is very convenient and the stability of the print head assembly and the rubber roller assembly is very good. Since the connecting portion is arranged at the rubber roller mounting bearing, the operation can be kept stable during the force transmission process, and the materials required for the connecting portion and the mounting portion itself can be saved; since the width of the connecting portion is smaller than the width of the upper and lower side wall mounting portions, degree, so a passing channel can be formed to provide a passing channel for consumables when replacing consumables; since the width of the passing channel is greater than the width of the connecting part, the minimum distance actually required to be crossed can be reduced to 40 mm; since the present invention can also use a connecting plate to connect the side wall mounting part, it can not only ensure the flexibility of the spacing between the side wall mounting parts and the stability of the printing performance, but also facilitate the installation of consumables; since the passing channel of the present invention is provided with a flexible dust shielding device that can be opened and closed, when replacing consumables, the consumables pass through the distance is very short, and at the same time, flexible sunshade upper and lower covers that can be opened and closed are provided, so that the consumables can pass through when replacing, and when not replaced, the possible dust can be blocked from affecting the print head; the label printing device of the present invention is also provided. A base paper tensioning mechanism for automatic paper peeling allows the consumables in the use process to continuously form waste paper and then be tightened and maintained. In short, the implementation of the label printing device provided by the present invention not only has good overall structural stability of the printer, but also is very convenient for installing and disassembling consumables, and can ensure that the print head assembly is not affected by environmental dust through the passing channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a structural schematic diagram of a label printing device according to an embodiment of the present invention;

[0014] Figure 2 Another structural diagram of the label printing device according to an embodiment of the present invention is

[0015] Figure 3 It is a schematic diagram of the structure of the installation part in the label printer of the embodiment of the present invention;

[0016] Figure 4 It is a schematic diagram of the exploded structure of a portion of a label printing device according to an embodiment of the present invention;

[0017] Figure 5 is a partial structural schematic diagram of a print head assembly in a label printing device according to an embodiment of the present invention;

[0018] Figure 6 is a schematic structural diagram of an installation part in a label printing device according to another embodiment of the present invention;

[0019] Figure 7 is a schematic structural diagram of an installation part in a label printing device according to another embodiment of the present invention;

[0020] Figure 8 is a schematic structural diagram of a base paper tensioning unit in a label printing device according to another embodiment of the present invention;

[0021] Fig. 9 This is a schematic diagram of the installation of consumables in an embodiment of the label printing device of the present invention;

[0022] Fig.10 It is a schematic diagram of the installation of consumables of a label printer in the prior art;

[0023] Fig.11 is a structural schematic diagram of a label printing device according to another embodiment of the present invention;

[0024] The unified explanation of each number in the figure is as follows:

[0025] 1: Print head assembly; 2: Rubber roller assembly; 3: Side wall; 31: Bearing; 4: Print head assembly side wall mounting portion; 5: Rubber roller assembly side wall mounting portion; 51: Rubber roller mounting bearing; 6: Connecting portion; 7: Crossing channel; 71: Upper cover elastic sheet; 72: Lower cover elastic sheet; 8: Connecting plate; 91: Peeling sheet; 92: Paper peeling rubber roller; 93: Bottom paper pressing roller; 94: Hook mechanism; 95: Bottom paper pressing roller bracket; 101: Print head bracket; 102: Upper cantilever beam; 103: Print head; 104: Print head bracket shaft; 201: Rubber roller; 202: Lower cantilever beam; DETAILED DESCRIPTION

[0026] As shown in Figure 1, in the label printing device provided in the embodiment of the present invention, it includes: a print head assembly 1, a rubber roller assembly 2, and a print head assembly side wall mounting portion 4 and a rubber roller assembly side wall mounting portion 5 for respectively mounting the print head assembly 1 and the rubber roller assembly 2 on the side wall 3 in sequence. The side wall 3 may be a part of the chassis of the printer, or a part of the chassis or main structure of the printing module of the device or system. In order to realize the main axis of the print head assembly and the rubber roller assembly required for label printing, they must be mounted on the side wall 3 perpendicular to the side wall. In the embodiment of the present invention, the print head assembly side wall mounting portion 4 and the rubber roller assembly side wall mounting portion 5 are respectively used, so that the print head assembly can be mounted on the side wall 3 through the print head assembly side wall mounting portion 4, wherein the upper cantilever beam 102 is mounted between the side wall and the print head assembly side wall mounting portion 4, and the rubber roller assembly can be mounted on the side wall 3 through the rubber roller assembly side wall mounting portion 5; the rubber roller 201 is mounted between the side wall and the rubber roller assembly side wall mounting portion 5.

[0027] In the embodiment, the upper cantilever beam 102 and the lower cantilever beam 202 are fixed to the side wall 3 by positioning columns and fixing screws, and the print head assembly side wall mounting portion 4 and the rubber roller assembly side wall mounting portion 5 are fixed to the upper and lower cantilever beams 102 and 202 by positioning columns and positioning screws.

[0028] The rubber roller 201 is installed between the side wall 3 and the rubber roller assembly side wall mounting portion 5 through the bearing 31 installed on the side wall 3 and the rubber roller mounting bearing 51 installed on the rubber roller assembly side wall mounting portion 5. Whether it is a direct thermal or thermal transfer printing method, the heat of the heating element on the print head must be transferred to the printing consumables to complete the printing action. The heat transfer method is heat conduction, which requires the print head to press the printing consumables tightly against the rubber roller. According to the technical specifications given by the print head manufacturer, this pressing force is approximately: 3N / cm, and the reaction force of this pressing force is to push the upper half of the print head assembly 1 of the movement module upward and push the lower half of the rubber roller assembly 2 of the movement module downward. At the same time, the frequent vibrations caused by the start / stop of the rubber roller when the printer is working, and the unevenness of the surface of the printing medium, such as the gap of the die-cut label, the perforation of the tag medium, etc., and the frequent vibrations caused by the friction with the print head will produce impact loads on the movement module. Therefore, when the print head assembly side wall mounting portion 4 and the rubber roller assembly side wall mounting portion 5 are independent structures, part of the structure of the print head assembly side wall mounting portion 4 will be deformed upward, and part of the structure of the rubber roller assembly side wall mounting portion 5 will be deformed downward. Therefore, the integration of the print head assembly side wall mounting portion 4 and the rubber roller assembly side wall mounting portion 5 is necessary.

[0029] Combination Figure 1 and Figure 3It can be seen that there is a connecting portion 6 between the print head assembly side wall mounting portion 4 and the rubber roller assembly side wall mounting portion 5 to connect the two together. Since the width of the connecting portion 6 is smaller than that of the print head assembly side wall mounting portion 4 and the rubber roller assembly side wall mounting portion 5, a through passage 7 for replacing consumables is reserved between the print head assembly side wall mounting portion 4 and the rubber roller assembly side wall mounting portion 5. With this through passage 7, it is very easy to replace and add printing consumables. Figure 3 In the embodiment, the connection part 6 is an integrated structure with the side wall mounting part 4 of the print head assembly and the side wall mounting part 5 of the rubber roller assembly, wherein the connection part 6 can ensure that the print head assembly 1 and the rubber roller assembly 2 are rigidly connected, the adjacent width L1 of the connection part 6 and the side wall mounting part 4 of the print head assembly is smaller than the width L3 of the side wall mounting part 4 of the print head assembly, and the adjacent width L2 of the connection part 6 and the side wall mounting part 5 of the rubber roller assembly is smaller than the width L4 of the side wall mounting part 5 of the rubber roller assembly, thereby forming a crossing channel 7 therebetween. The width L5 of the crossing channel 7 is larger than the adjacent width L2 of the connection part 6 and the side wall mounting part 5 of the rubber roller assembly, and is also larger than the adjacent width L1 of the connection part 6 and the side wall mounting part 4 of the print head assembly. If L1 and L2 of the connection part 6 are the same, then the width of the connection part 6 is the same as L1 and L2. The smaller the width, i.e., the smaller the width, the longer the width L5 of the crossing channel, and the more conducive it is for the consumables to pass through.

[0030] In an experimental comparative test, when using the fully enclosed movement module of the prior art, the distance that needs to be traversed when replacing consumables is at least 60-80 mm. If the prior art separated movement module is used, the distance that the consumables need to traverse is 0. However, due to the reasons described above, the vibration between the print head assembly and the rubber roller assembly during operation will cause the printing quality to be unable to be guaranteed. When using the semi-enclosed movement module implemented by the present invention, the minimum distance that the consumables need to traverse when installing the consumables is only 15 mm. Obviously, such a short distance does not pose any difficulty in replacing consumables. In the label printer of the prior art using a separated structure, in order to ensure the overall strength of the rubber roller assembly, the height dimension of the rubber roller assembly 2 is generally greater than 50 mm. In the embodiment of the present invention, this part of the dimension can be reduced to the range of 20 mm, while ensuring the working stability and convenience of replacing consumables, while reducing the size of the entire movement module.

[0031] like Figure 2As shown, a rubber roller mounting bearing 51 is provided near the connecting portion 6 of the rubber roller assembly side wall mounting portion 5, a bearing 31 is provided at a corresponding height of the side wall 3, and both ends of the rubber roller 201 included in the rubber roller assembly 2 are respectively mounted between the bearing 31 on the side wall 3 and the rubber roller mounting bearing 51 on the rubber roller assembly side wall mounting portion 5, so that the rubber roller 201 can rotate. The rubber roller assembly 2 also includes a lower cantilever beam 202, one end of which is fixed to the side wall 3 by a positioning column and a screw, and the other end is fixed to the rubber roller assembly side wall mounting portion 5 by a positioning column and a screw.

[0032] Figure 1 The print head assembly 1 in Figure 2 and Figure 4 The print head assembly 1 includes an upper cantilever beam 102, one end of which is fixed to the side wall 3 by a positioning column and a screw, and the other end is fixedly mounted on the print head assembly side wall mounting portion 4 by a positioning column and a screw. The print head assembly 1 also includes a print head support shaft 104, a print head support 101 mounted on the print head support shaft 104, and a print head 103 mounted on the print head support 101. The print head assembly 1 is arranged between the side wall 3 and the print head assembly side wall mounting portion 4, and the rubber roller assembly 2 is arranged between the side wall 3 and the rubber roller assembly side wall mounting portion 5, but below the print head assembly 1, the print head assembly side wall mounting portion 4 and the rubber roller assembly side wall mounting portion 5 and the connecting portion 6 connecting the two together constitute another side wall parallel to the side wall 3, and between the side wall 3 and the other side wall (the print head assembly side wall mounting portion 4, the connecting portion 6, and the rubber roller assembly side wall mounting portion 5), the upper cantilever beam 102 and the lower cantilever beam 202 respectively support the rigid connection between the print head assembly side wall mounting portion 4 and the rubber roller assembly side wall mounting portion 5 and the side wall 3.

[0033] Combination Figure 4 The rubber roller assembly 2 includes a rubber roller 201 rotatably mounted between the side wall 3 and the rubber roller assembly side wall mounting portion 5 and a lower cantilever beam 202 fixed on the side wall 3 in a cantilever manner at one end. Figure 4 It can be seen that the cross-section of the lower cantilever beam 202 is smaller than the cross-section of the upper cantilever beam 102. Therefore, the area of ​​the corresponding print head assembly side wall mounting portion 4 is also larger than the area of ​​the rubber roller assembly side wall mounting portion 5. This is because the size of the print head assembly is larger than the size of the rubber roller assembly. Otherwise, the print head assembly side wall mounting portion 4 and the rubber roller assembly side wall mounting portion 5 may not be able to stably install the corresponding components on the side wall 3. Figure 4 It is also shown that the side wall mounting portion 4 of the print head assembly has a plurality of mounting holes.

[0034] Combination Figure 4 and Figure 5Let's look at the specific structure of the print head assembly 1. In the print head assembly 1, the print head assembly side wall mounting portion 4 is connected to the side wall 3 through the upper cantilever beam 102. The print head assembly 1 also includes: a print head support shaft 104 supported at both ends by the side wall 3 and the holes on the print head assembly side wall mounting portion 4, a print head support 101 mounted on the print head support shaft 104, and a print head 103 mounted on the print head support 101. The print head 103 is used to control the printing consumables on the rubber roller 201, the print head support 101 is used to install the print head 103, and the print head support shaft 104 is used to drive the print head to flip and print through the print head support 101, or to apply pressure on the printing consumables. Among them, one end of the upper cantilever beam 102 is fixed to the side wall 3 in a cantilever manner, for example, it is positioned and installed with a positioning column and a screw hole.

[0035] Figure 4 In the illustrated embodiment, the side wall mounting portion 4 of the print head assembly, the side wall mounting portion 5 of the rubber roller assembly, and the connection portion 6 between the side wall mounting portion 4 of the print head assembly and the side wall mounting portion 5 of the rubber roller assembly are an integrated structure. This is because the connection portion 6 is used to ensure that the print head assembly 1 and the rubber roller assembly 2 and the side wall 3 are respectively rigidly connected. The connection portion 6 connecting the side wall mounting portion 4 of the print head assembly and the side wall mounting portion 5 of the rubber roller assembly and the hollowed-out through-channel 7 are adjacent to the side wall mounting portion 4 of the print head assembly and the side wall mounting portion 5 of the rubber roller assembly, respectively, wherein, at the adjacent interface with the side wall mounting portion 4 of the print head assembly, the adjacent width of the connection portion 6 is smaller than the adjacent width of the hollowed-out through-channel 7, and similarly, at the adjacent interface with the side wall mounting portion 5 of the rubber roller assembly, the adjacent width of the connection portion 6 is smaller than the adjacent width of the hollowed-out through-channel 7, so as to ensure that the width of the connection portion 6 is smaller than the width of the through-channel 7, so as to form an open consumable through-channel that occupies as much as possible, so as to facilitate the passage of printing consumables. In this way, the width of the through channel 7 is greater than the adjacent width between the connecting portion 6 and the side wall mounting portion 5 of the rubber roller assembly, and is also greater than the adjacent width between the connecting portion 6 and the side wall mounting portion 4 of the print head assembly.

[0036] exist Figure 6 In another embodiment of the present invention, the connection portion 6 is not formed integrally with the print head assembly side wall mounting portion 4 and the rubber roller assembly side wall mounting portion 5, but is connected to the print head assembly side wall mounting portion 4 and the rubber roller assembly side wall mounting portion 5 by a connection plate constituting the connection portion 6, thereby forming a whole. Figure 6The connection part 6 includes a connection plate 8, the width of which is smaller than the width of the upper side wall and the lower side wall, respectively. The print head assembly side wall mounting part 4 and the rubber roller assembly side wall mounting part 5 are respectively fixedly connected to form a whole through the connection plate 8. This whole can be installed parallel to the side wall 3, and a through channel 7 for printing consumables is formed between the print head assembly side wall mounting part 4 and the rubber roller assembly side wall mounting part 5. The advantage of using the connection plate is that its height can be adjusted as needed to suit the size of the printer core of different combinations. For example, to adapt to print head assemblies of different sizes, it is sufficient to change the height of the connection plate.

[0037] exist Figure 7 In another embodiment of the present invention shown, an upper cover elastic sheet 71 and a lower cover elastic sheet 72 are respectively provided on the upper and lower sides of the through channel 7, forming an openable and closable flexible dust shielding device, which can be an upper cover elastic sheet 71 installed on the lower edge of the side wall mounting portion 4 of the print head assembly and a lower cover elastic sheet 72 installed on the upper edge of the side wall mounting portion 5 of the rubber roller assembly, so that the consumables can pass therebetween. Such a flexible opening and closing device provided in the hollow through channel does not affect the passing of the printing consumables, and can prevent environmental dust from entering the print head assembly through the gap of the through channel.

[0038] Back to Figure 2 In the label printing device of the embodiment of the present invention shown, another side wall is formed by the print head assembly side wall mounting portion 4, the connecting portion 6 and the rubber roller assembly side wall mounting portion 5, which are arranged in parallel with the side wall 3. In other words, it can be said that this other side wall includes an integrated mounting portion, namely an upper side wall portion and a lower side wall portion, between which a connecting portion 6 and a through channel 7 formed by a notch are formed. The connecting portion 6 is arranged on the side close to the rubber roller 21 to ensure that the upper and lower parts of the movement are rigidly connected to form an integrated movement structure. The through channel 7 is used to provide a channel for storing and accessing consumables, providing convenience for storing and accessing consumables. The other end of the upper cantilever beam 102 is fixedly connected to the print head assembly side wall mounting portion 4, and the other end of the lower cantilever beam 202 is fixedly connected to the rubber roller assembly side wall mounting portion 5 to support the entire movement module.

[0039] In the label printing device of the embodiment of the present invention, the print head assembly 1 includes a print head support 101, a print head 103 fixed on the print head support 101, a print head support shaft 104 and an upper cantilever beam 102. The two ends of the print head support shaft 104 are supported by holes provided on the side wall 3 and the print head assembly side wall mounting portion 4 respectively; the two ends of the upper cantilever beam 102 are fixed on the side wall 3 and the print head assembly side wall mounting portion 4 respectively. The rubber roller assembly 2 includes a rubber roller 201 and a lower cantilever beam 202. The two ends of the lower cantilever beam 202 are fixed on the side wall 3 and the rubber roller assembly side wall mounting portion 5 respectively. The two ends of the rubber roller 201 are rotatably mounted on the side wall 3 and the rubber roller assembly side wall mounting portion 5 respectively, and the print head 103 is pressed on the rubber roller 201. The side wall 3 is fixed on the printer base, and the upper side wall and the lower side wall are not connected to the printer base. The upper cantilever beam 102 and the lower cantilever beam 202 are fixed on the side wall 3 in a cantilever manner, and support the entire core module through fixed connection with the print head assembly side wall mounting portion 4 and the rubber roller assembly side wall mounting portion 5.

[0040] When the label printer is working, the reaction force of the clamping force applied during printing pushes the upper part of the movement module upward and the lower part of the movement module downward. At the same time, the frequent vibrations caused by the start / stop of the rubber roller when the printing device is working, as well as the unevenness of the surface of the printing medium, such as the gap of the die-cut label, the perforation of the tag medium, etc., and the frequent vibrations caused by the friction with the print head will produce impact loads on the movement module. In this case, the structure of the movement module is prone to deformation, resulting in changes in the relative position of the print line on the print head and the rubber roller, which directly affects the printing effect and causes the failure phenomenon of the carbon ribbon wrinkling.

[0041] In this embodiment, since the side wall mounting portion 4 of the print head assembly and the side wall mounting portion 5 of the rubber roller assembly are fixedly connected (or the two are the same plate), the lower cantilever beam 202 only needs to play an auxiliary role while ensuring the strength of the upper cantilever beam 102. Its overall size can be made very small, and its thickness direction size can be smaller than the diameter of the rubber roller, and can also be slightly larger than the diameter of the rubber roller.

[0042] In another embodiment, the lower cantilever beam 202 may be omitted. Fig.11 As shown, in Fig.11In another embodiment of the present invention shown, the core structure is the side wall 3 and the mounting parts (print head assembly side wall mounting part 4, rubber roller assembly side wall mounting part 5) connected by the connecting part 6 and the upper cantilever beam 102. The upper cantilever beam is used to fix the print head assembly side wall mounting part 4. Only by ensuring that the upper cantilever beam 102 has sufficient strength, can the sufficient strength between the print head assembly side wall mounting part 4 and the side wall 3 be ensured. At the same time, the upper cantilever beam 102 is between the side wall 3 and the print head assembly side wall mounting part 4, and constitutes the print head support shaft 104 of the print head assembly, the print head support 101 mounted on the print head support shaft 104, and the print head 103 mounted on the print head support 101. The print head assembly 1 is arranged between the side wall 3 and the print head assembly side wall mounting part 4. The rubber roller 201 is between the side wall 3 and the rubber roller assembly side wall mounting part 5. This embodiment does not have a lower cantilever beam, which has the advantage of reducing the installation space occupied by the rubber roller assembly, thereby achieving a compact structure of the movement while ensuring stability.

[0043] In the embodiment of the present invention, the size of the lower cantilever beam is very small, and the saved position can be used to add a bottom paper tensioning mechanism for automatic paper peeling that is easy to operate. Figure 8 In the illustrated embodiment, the bottom paper tensioning mechanism includes a peeling sheet 91, which is used to form a peeling angle between the bottom paper and the paper output direction of the printer. When the bottom paper is tightened during the paper output process, the surface paper with adhesive backing is peeled off; a paper peeling rubber roller 92, which is used to drive and tighten the bottom paper; a bottom paper pressing roller 93, which is used to press the bottom paper on the paper peeling rubber roller 92 to generate friction; a bottom paper pressing roller bracket 95, which is used to install the bottom paper pressing roller 93 and apply pressure to the bottom paper pressing roller 93; the two ends of one side of the bottom paper pressing roller bracket 95 are respectively rotatably fixed on the side wall 3 and the side wall mounting portion 5 of the rubber roller assembly, and the other side is locked or released by a hook mechanism 94; the two ends of the hook mechanism are rotatably mounted on the side wall 3 and the side wall mounting portion 5 of the rubber roller assembly.

[0044] The above printer with automatic paper peeling mechanism is suitable as a printer for automatic labeling system of production line because the size of the lower part of the machine core can be made very small. For automatic labeling system, whether it is vacuum adsorption or rolling labeling, the closer the paper outlet of label printer is to the labeled object, the better. Fig. 9 The label printer of the present invention shown in the figure has a horizontal paper feed path; Fig.10 Compared with the existing label printers, the distance between the paper outlet and the bottom of the printer is very short; the rotating bottom paper pressing roller bracket locked and released by the hook makes the operation very convenient.

[0045] The label printing device in the embodiment of the present invention is much more convenient for installing consumables than the integrated structure in the prior art, and the size of the structure is also more compact than the separate structure.

[0046] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A label printing device, characterized in that: include: A print head assembly (1), an upper cantilever beam (102) mounted on a side wall (3), and a print head assembly side wall mounting portion (4) mounted on the upper cantilever beam (102), a rubber roller assembly (2) mounted on the side wall at one end, and a rubber roller assembly side wall mounting portion (5) connected to the other end of the rubber roller assembly (2), a connecting portion (6) between the print head assembly side wall mounting portion (4) and the rubber roller assembly side wall mounting portion (5) for connecting the two structures together, and a through channel (7) for replacing consumables, wherein the A rubber roller mounting bearing (51) is provided on the rubber roller assembly side wall mounting portion (5) near the connecting portion (6); the rubber roller assembly (2) comprises a rubber roller (201) rotatably mounted between the side wall (3) and the rubber roller assembly side wall mounting portion (5) via a bearing (31) on the side wall (3) and the rubber roller mounting bearing (51) on the rubber roller assembly side wall mounting portion (5); one end of the print head assembly (1) is fixed to the side wall (3) and the other end is fixed to the print head assembly side wall mounting portion (4); The connecting portion (6) is an integrated structure with the side wall mounting portion (4) of the print head assembly and the side wall mounting portion (5) of the rubber roller assembly, or the connecting plate (8) constituting the connecting portion (6) connects the side wall mounting portion (4) of the print head assembly and the side wall mounting portion (5) of the rubber roller assembly respectively, so as to be connected as one; the width of the connecting portion (6) is smaller than the width of the side wall mounting portion (4) of the print head assembly and the side wall mounting portion (5) of the rubber roller assembly, and a through channel (7) is formed between the side wall mounting portion (4) of the print head assembly, the side wall mounting portion (5) of the rubber roller assembly and the connecting portion (6); The print head assembly (1) further comprises: a print head support shaft (104) mounted between the side wall (3) and the print head assembly side wall mounting portion (4), a print head support (101) rotatably mounted on the print head support shaft (104), and a print head (103) mounted on the print head support (101) and used for controlled heating / pressure on the printing consumables in the direction of the rubber roller (201).

2. The label printing device according to claim 1, characterized in that: The connecting portion (6) is an integrated structure with the side wall mounting portion (4) of the print head assembly and the side wall mounting portion (5) of the rubber roller assembly, wherein the connecting portion (6) is used to ensure that the print head assembly (1) and the rubber roller assembly (2) are rigidly connected, the adjacent width (L1) of the connecting portion (6) and the side wall mounting portion (4) of the print head assembly is smaller than the width (L3) of the side wall mounting portion (4) of the print head assembly, and the adjacent width (L2) of the connecting portion (6) and the side wall mounting portion (5) of the rubber roller assembly is smaller than the width (L4) of the side wall mounting portion (5), thereby forming a through channel (7) between the two.

3. The label printing device according to claim 2, characterized in that: The width (L5) of the crossing channel (7) is greater than the adjacent width (L2) of the connecting portion (6) and the side wall mounting portion (5) of the rubber roller assembly, and the width (L5) of the crossing channel is greater than the adjacent width (L1) of the connecting portion (6) and the side wall mounting portion (4) of the print head assembly.

4. The label printing device according to claim 1, characterized in that: The connecting portion (6) comprises a connecting plate (8), the width (L6) of the connecting plate (8) being smaller than the width of the side wall mounting portion (4) of the print head assembly and the side wall mounting portion (5) of the rubber roller assembly, respectively; the side wall mounting portion (4) of the print head assembly and the side wall mounting portion (5) of the rubber roller assembly are respectively fixedly connected via the connecting plate (8) to form a whole including the crossing channel (7).

5. The label printing device according to any one of claims 1 to 4, characterized in that: The passage (7) is provided with an openable and closable flexible dust shielding device, comprising an upper cover elastic sheet (71) respectively mounted on the lower edge of the side wall mounting portion (4) of the print head assembly and a lower cover elastic sheet (72) respectively mounted on the upper edge of the side wall mounting portion (5) of the rubber roller assembly, so that consumables can pass therethrough.

6. The label printing device according to any one of claims 1 to 4, characterized in that: It also includes a lower cantilever beam (202), one end of which is fixed on the side wall (3) and the other end of which is fixedly mounted on the side wall mounting portion (5) of the rubber roller assembly.

7. The label printing device according to any one of claims 1 to 4, characterized in that: The print head assembly side wall mounting portion (4) is fixed to one end of the upper cantilever beam (102) via a positioning column and a screw, and the other end of the upper cantilever beam (102) is fixed to the side wall (3) via a positioning column and a screw.

8. The label printing device according to any one of claims 1 to 4, characterized in that: The invention also comprises a bottom paper tensioning mechanism for automatic paper peeling, wherein the bottom paper tensioning mechanism comprises a peeling sheet (91) for forming a peeling angle between the bottom paper and the paper output direction of the printer so that when the bottom paper is tensioned during the paper output process, the surface paper with adhesive backing is peeled off; a paper peeling rubber roller (92) for driving and tensioning the bottom paper; a bottom paper pressing roller (93) for pressing the bottom paper against the paper peeling rubber roller to generate friction; a hook mechanism (94) with two ends rotatably mounted on the side wall (3) and the side wall mounting portion (5) of the rubber roller assembly; and a bottom paper pressing roller bracket (95) for mounting the bottom paper pressing roller (93) and applying pressure to the bottom paper pressing roller (93); two ends of one side of the bottom paper pressing roller bracket (95) are respectively rotatably fixed on the side wall (3) and the side wall mounting portion (5) of the rubber roller assembly, and the other side of the bottom paper pressing roller bracket (95) is locked or released by the hook mechanism (94).

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