Printing head assembly and label printer

Abstract

The utility model discloses a printing head assembly and a label printer. The printing head assembly comprises a mounting plate and a printing head. The mounting plate is provided with a mounting surface, a boss structure extending in the first direction is arranged on the mounting surface, the first direction is parallel to the length direction of the mounting plate, a mounting space is defined by the boss structure and the mounting plate, the side, facing the mounting space, of the boss structure is a positioning surface, and a plurality of positioning protrusions arranged at intervals in the first direction are arranged on the positioning surface; the printing head is installed in the installation space and connected with the installation face, and the side, facing the positioning face, of the printing head abuts against the positioning protrusion. The installation precision of the printing head can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of label printing, in particular to a print head assembly and a label printer. BACKGROUND

[0002] A label refers to a text, graphic symbol and all instructions on a product. Labels are widely used in scenarios such as supermarkets, retail, industrial production, express delivery, clothing and office management. A label printer is a device capable of printing labels on a label paper to other objects. A print head assembly is a component used for label printing on a label printer. The print head assembly usually includes a mounting plate and a print head mounted on the mounting plate.

[0003] However, the overall manufacturing tolerance of the print head is difficult to control during processing and manufacturing, which affects the installation precision of the print head on the mounting plate, and further affects the printing effect. Utility model content

[0004] The present application provides a print head assembly and a label printer, which can improve the installation precision of the print head.

[0005] In a first aspect, the present application provides a print head assembly, comprising:

[0006] A mounting plate having a mounting surface, wherein the mounting surface is provided with a boss structure extending along a first direction, the first direction is parallel to the length direction of the mounting plate, the boss structure and the mounting plate define a mounting space, one side of the boss structure facing the mounting space is a positioning surface, and a plurality of positioning protrusions are arranged on the positioning surface along the first direction.

[0007] A print head is installed in the mounting space and connected with the mounting surface, and one side of the print head facing the positioning surface abuts against the positioning protrusions.

[0008] In some embodiments, the dimension of the positioning protrusions along the first direction is d1, and 0.05 mm≤d1≤0.3 mm.

[0009] In some embodiments, the distance between the top of the positioning protrusion and the positioning surface is L, and 0.05 mm≤L≤0.5 mm.

[0010] In some embodiments, at least two positioning protrusions are symmetrically distributed about a first median line of the positioning surface, and the first median line is perpendicular to the first direction.

[0011] In some embodiments, the distance between the two farthest positioning protrusions along the first direction is D1, and the dimension of the print head along the first direction is D2, and D1<D2.

[0012] In some embodiments, the mounting plate comprises two first end surfaces arranged along the first direction, and the printhead comprises two second end surfaces arranged along the first direction; wherein the positioning protrusion closest to the first end surface is a first positioning protrusion, and the distance between the top of the first positioning protrusion and the closest second end surface along the first direction is D3, 0.5 mm≤D3≤5 mm.

[0013] In some embodiments, a groove is arranged on the mounting surface, and the groove is located on the side of the boss structure close to the mounting space.

[0014] In some embodiments, the groove extends along the first direction to pass through both ends of the mounting plate.

[0015] In some embodiments, the groove is located at the junction of the positioning surface and the mounting surface.

[0016] In some embodiments, the groove has a groove width m, 0.5 mm≤m≤1.5 mm.

[0017] In some embodiments, the side surface of the boss structure away from the mounting plate is a paper guide surface, the side surface of the printhead away from the mounting plate is a printing surface, the distance between the paper guide surface and the mounting surface along the second direction is n1, the distance between the printing surface and the mounting surface along the second direction is n2, and the second direction is parallel to the thickness direction of the mounting plate; wherein n1

[0018] In some embodiments, 0.001 mm≤|n2-n1|≤0.2 mm.

[0019] In a second aspect, the present application also provides a label printer comprising a body and a printhead assembly as described in any one of the above embodiments, wherein the printhead assembly is mounted on the body.

[0020] In some embodiments, the body has a paper bin for accommodating a label paper roll, the printhead assembly is located outside the paper bin, the mounting plate is connected to the body, and the printhead is located on the side of the mounting plate facing the paper bin.

[0021] The beneficial effects of the present application are as follows: the positioning protrusion provides mounting positioning of the print head on the mounting plate. Compared with the overall volume of the mounting plate and the print head, the volume of the positioning protrusion is smaller, the difficulty of processing and forming is lower, and the manufacturing tolerance is easy to control. The positioning protrusion can ensure sufficient manufacturing precision, so that when the print head is mounted on the mounting plate, the distance between the print head and the positioning surface is controlled through the positioning protrusion, so that the distance between the print head and the positioning surface is easy to control, thereby improving the mounting precision of the print head on the mounting plate, and preventing the low mounting precision of the print head from affecting the printing effect. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 FIG. 1 is a structural schematic view of a print head assembly in a first perspective view according to an embodiment of the present application;

[0024] Figure 2 FIG. 2 is an enlarged schematic view of position A in FIG. 1; Figure 1

[0025] Figure 3 FIG. 3 is a structural schematic view of a print head assembly in a second perspective view according to an embodiment of the present application;

[0026] Figure 4 FIG. 4 is an enlarged schematic view of position B in FIG. 3; Figure 3

[0027] Figure 5 FIG. 5 is an exploded schematic view of a print head assembly according to an embodiment of the present application;

[0028] Figure 6 FIG. 6 is a structural schematic view of a label printer according to an embodiment of the present application;

[0029] Figure 7 FIG. 7 is a partial structural schematic view of a label printer according to an embodiment of the present application.

[0030] REFERENCE SIGNS:

[0031] 10, mounting plate; 11, mounting surface; 12, boss structure; 121, positioning surface; 122, paper guide surface; 13, mounting space; 14, positioning protrusion; 15, first positioning protrusion; 16, first end surface; 17, groove; 20, print head; 21, second end surface; 22, printing surface; 30, machine body; 31, paper bin; K, first center line. DETAILED DESCRIPTION​​

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0033] This application provides a printhead assembly and a label printer to solve the problem in the related art where the overall manufacturing tolerance of the printhead is difficult to control during processing and manufacturing, which affects the installation accuracy of the printhead on the mounting plate and thus affects the printing effect.

[0034] Firstly, this application provides a printhead assembly, such as... Figures 1 to 5 As shown, the printhead assembly includes a mounting plate 10 and a printhead 20. The printhead assembly can be used in a label printer to print labels from label paper onto other objects.

[0035] The mounting plate 10 has a mounting surface 11, on which a boss structure 12 extending along a first direction XX is provided. The first direction XX is parallel to the length direction of the mounting plate 10. The boss structure 12 and the mounting plate 10 define a mounting space 13 (e.g., Figure 5 The boss structure 12 has a positioning surface 121 on the side facing the mounting space 13. Multiple positioning protrusions 14 are arranged at intervals along the first direction XX on the positioning surface 121. There can be two, three, or more positioning protrusions 14. The mounting plate 10 is a device used to provide a mounting position for the printhead 20, facilitating the mounting of the printhead 20 onto the body 30 of the label printer (e.g., ...). Figure 4 For installation on the printhead 20, the mounting plate 10 can be long and narrow to better accommodate the installation of the printhead 20.

[0036] The print head 20 is installed in the installation space 13 and connected to the installation surface 11. The side of the print head 20 facing the positioning surface 121 abuts against the positioning protrusion 14. A heating wire can be provided on the print head 20, and the label on the label paper is printed onto other objects by heating the label paper.

[0037] It can be understood that, in the present application, the positioning protrusion 14 provides mounting positioning for the printhead 20 on the mounting plate 10, the volume of the positioning protrusion 14 is small compared to the overall volume of the mounting plate 10 and the printhead 20, the difficulty of processing and forming is low, the manufacturing tolerance is easy to control, and the manufacturing tolerance of the positioning protrusion 14 can be controlled to be even less than 0.08 mm. The positioning protrusion 14 can ensure sufficient manufacturing precision, so that when the printhead 20 is mounted on the mounting plate 10, the distance between the printhead 20 and the positioning surface 121 is controlled by the positioning protrusion 14, thereby making it easy to control the distance between the printhead 20 and the positioning surface 121, and further improving the mounting precision of the printhead 20 on the mounting plate 10, preventing the low mounting precision of the printhead 20 from affecting the printing effect.

[0038] Continuing to refer to FIGS. 1-3, Figure 1 and Figure 2 In some embodiments, the distance between the top of the positioning protrusion 14 and the positioning surface 121 is L, and 0.05 mm≤L≤0.5 mm. It can be understood that when L is greater than 0.5 mm, the volume of the positioning protrusion 14 is too large, which can cause the distance between the printhead 20 and the positioning surface 121 to be too large, thereby reducing the overlap between the printhead 20 and the mounting plate 10, and further causing the overall volume of the printhead assembly to be too large. When L is less than 0.05 mm, the distance between the printhead 20 and the positioning surface 121 is too small, which can make it difficult to ensure the mounting precision of the printhead 20 on the mounting plate 10. In some embodiments, L can be 0.05 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.5 mm, or other sizes.

[0039] In some embodiments, the side surface of the mounting plate 10 away from the printhead 20 is a paper guide surface 122, and the side surface of the printhead 20 away from the mounting plate 10 is a printing surface 22. The printing surface 22 is the side surface of the printhead 20 that is used to contact the printing paper and perform label printing. The distance between the paper guide surface 122 and the mounting surface 11 along the second direction YY is n1, and the distance between the printing surface 22 and the mounting surface 11 along the second direction YY is n2. The second direction YY is parallel to the thickness direction of the mounting plate 10. The specific values of n1 and n2 can be selected according to actual needs, and the present application does not make any limitation.

[0040] In some embodiments, n1 Figure 1 As shown in the view angle, the paper guide surface 122 is lower than the printing surface 22, and the printing surface 22 protrudes from the paper guide surface 122, which facilitates the contact between the paper guide surface and the label paper during label printing.

[0041] In some other embodiments, n2 Figure 1As shown in the perspective view, the paper guide surface 122 is higher than the printing surface 22, so that the printing surface 22 can be hidden in the mounting space 13, and the printing surface 22 can be damaged by friction with other objects during the process of mounting the printing assembly on the machine body 30.

[0042] In some embodiments, 0.001 millimeter≤|n2-n1|≤0.2 millimeter, that is, the absolute value of n2 and n1 is greater than or equal to 0.001 millimeter and greater than or equal to 0.2 millimeter. When n1

[0043] In some embodiments, the mounting surface 11 is provided with a groove 17, and the groove 17 is located on the side of the boss structure 12 close to the mounting space 13. It can be understood that when the printhead 20 is mounted, the printhead 20 can be adhered to the mounting surface 11 by an adhesive, and the groove 17 can provide a space for accommodating excess adhesive, so that the printhead 20 is mounted more stably, thereby further improving the mounting accuracy of the printhead 20.

[0044] Further, the groove width of the groove 17 is m, and 0.5 millimeter≤m≤1.5 millimeter. It can be understood that when m is greater than 1.5 millimeter, the part of the printhead 20 opposite to the position of the groove 17 is easy to tilt into the groove 17 when the printhead 20 is mounted, which reduces the mounting accuracy of the printhead 20; when m is less than 0.5 millimeter, the volume of the groove 17 is small, and the adhesive capacity is poor, which makes it difficult to accommodate more adhesive. Wherein, m can be 0.5 millimeter, 0.8 millimeter, 1 millimeter, 1.5 millimeter or other values.

[0045] In some embodiments, the groove 17 is located at the connection between the positioning surface 121 and the mounting surface 11, so that the positioning surface 121 can extend into the groove 17, part of the positioning surface 121 forms a groove wall surface of the groove 17, the length of the positioning surface 121 in the second direction YY can be extended, the volume of the positioning surface 121 is larger, so that the processing and forming of the positioning protrusion 14 on the positioning surface 121 is easier, thereby the manufacturing precision of the positioning protrusion 14 is easier to ensure.

[0046] In some embodiments, as shown in Figure 5 the groove 17 extends along the first direction XX to pass through both ends of the mounting plate 10, so that when the adhesive is excessive, the adhesive in the groove 17 can be discharged outward through both ends of the groove 17.

[0047] As shown in Figure 3 and Figure 4 In some embodiments, the size of the positioning protrusion 14 along the first direction XX is d1, 0.05 millimeters ≤ d1 ≤ 0.3 millimeters. It can be understood that when d1 is greater than 0.3 millimeters, the volume of the positioning protrusion 14 is too large, it is difficult to ensure the manufacturing precision of the positioning protrusion 14, and the installation precision of the print head 20 on the mounting plate 10 is reduced; when d1 is less than 0.05 millimeters, the volume of the positioning protrusion 14 is too small, which will cause the contact area between the positioning protrusion 14 and the print head 20 to be too small, it is difficult to ensure the stable installation of the print head 20, and the positioning protrusion 14 is prone to significantly reduce the positioning precision due to small wear. Wherein, d1 can be 0.05 millimeters, 0.1 millimeters, 0.15 millimeters, 0.2 millimeters, 0.3 millimeters or other sizes.

[0048] In some embodiments, the mounting plate 10 includes two first end surfaces 16 arranged along the first direction XX, the print head 20 includes two second end surfaces 21 arranged along the first direction XX, the positioning protrusion 14 closest to the first end surface 16 is a first positioning protrusion 15, the distance between the convex top of the first positioning protrusion 15 and the closest second end surface 21 along the first direction XX is D3, 0.5 millimeters ≤ D3 ≤ 5 millimeters.

[0049] It can be understood that the first end surface 16 is an end surface of the mounting plate 10, the second end surface 21 is an end surface of the print head 20, the first positioning protrusion 15 is the positioning protrusion 14 closest to the second end surface 21 among the plurality of positioning protrusions 14, and the first positioning protrusion 15 is used to contact the portion near the end of the print head 20. When D3 is greater than 5 mm, the distance between the first positioning protrusion 15 and the second end surface 21 is too large, it is difficult to provide stable limiting and support for the end of the print head 20, and the end of the print head 20 is prone to tilting, thereby reducing the installation accuracy of the print head 20; when D3 is less than 0.5 mm, the distance between the first positioning protrusion 15 and the second end surface 21 is too small, and if the end of the print head 20 is slightly tilted, the print head 20 cannot be in contact with the first positioning protrusion 15. Wherein, D3 can be 0.5 mm, 1 mm, 2 mm, 3 mm, 5 mm or other sizes.

[0050] As shown in Figure 5 , in some embodiments, at least two positioning protrusions 14 are symmetrically distributed about a first median line K of the positioning surface 121, and the first median line K is perpendicular to the first direction XX. It can be understood that, taking the view angle shown in Figure 3 as an example, the first median line K is a line connecting the midpoints of the two long edges of the positioning surface 121, and the use of two positioning protrusions 14 symmetric about the first median line K to abut against the two ends of the print head 20 can prevent the end of the print head 20 from tilting, making the installation of the print head 20 on the mounting plate 10 more stable, thereby improving the installation accuracy of the print head 20.

[0051] In some embodiments, the distance between the two farthest positioning protrusions 14 along the first direction XX is D1, and the size of the print head 20 along the first direction XX is D2, and D1 < D2, so that all the positioning protrusions 14 can be in contact with the print head 20, thereby making the installation of the print head 20 on the mounting plate 10 more stable, and thereby improving the installation accuracy of the print head 20. Wherein, the specific values of D1 and D2 can be selected according to actual needs, which are not limited by the present application.

[0052] In a second aspect, based on the above-mentioned print head assembly, the present application further provides a label printer, as shown in Figure 6 and Figure 7 , the label printer comprises a body 30 and a print head assembly according to any one of the above-mentioned embodiments, and the print head assembly is installed on the body 30.

[0053] In some embodiments, the body 30 has a paper bin 31 for accommodating a label paper tube, the label paper tube has label paper wound thereon, the print head assembly is located outside the paper bin 31, the mounting plate 10 is connected to the body 30, the print head 20 is located on the side of the mounting plate 10 facing the paper bin 31, and the print head 20 is installed on the body 30 through the mounting plate 10.

[0054] The above merely provides the preferred embodiment of the present application, and not intended to limit the present application. Accordingly, any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall fall within the scope of protection of the present application.

Claims

1. A printhead assembly, characterized in that, include: The mounting plate has a mounting surface, on which a boss structure extending along a first direction is provided. The first direction is parallel to the length direction of the mounting plate. The boss structure and the mounting plate define an installation space. The side of the boss structure facing the installation space is a positioning surface. The positioning surface is provided with a plurality of positioning protrusions spaced apart along the first direction. A printhead is installed in the installation space and connected to the installation surface, with the side of the printhead facing the positioning surface abutting against the positioning protrusion.

2. The printhead assembly according to claim 1, characterized in that, The dimension of the positioning protrusion along the first direction is d1, where 0.05 mm ≤ d1 ≤ 0.3 mm.

3. The printhead assembly according to claim 1, characterized in that, The distance between the convex top of the positioning protrusion and the positioning surface is L, where 0.05 mm ≤ L ≤ 0.5 mm.

4. The printhead assembly according to claim 1, characterized in that, At least two of the positioning protrusions are symmetrically distributed about a first centerline of the positioning surface, and the first centerline is perpendicular to the first direction.

5. The printhead assembly according to claim 1, characterized in that, The distance between the two furthest positioning protrusions along the first direction is D1, and the dimension of the print head along the first direction is D2, where D1 < D2.

6. The printhead assembly according to claim 1, characterized in that, The mounting plate includes two first end faces arranged along the first direction, and the print head includes two second end faces arranged along the first direction; The positioning protrusion closest to the first end face is the first positioning protrusion, and the distance between the top of the first positioning protrusion and the second end face closest to it along the first direction is D3, where 0.5 mm ≤ D3 ≤ 5 mm.

7. The printhead assembly according to claim 1, characterized in that, A groove is provided on the mounting surface, and the groove is located on the side of the boss structure close to the mounting space.

8. The printhead assembly according to claim 7, characterized in that, The groove extends along the first direction to penetrate both ends of the mounting plate.

9. The printhead assembly according to claim 7, characterized in that, The groove is located at the junction of the positioning surface and the mounting surface.

10. The printhead assembly according to claim 7, characterized in that, The groove width is m, where 0.5 mm ≤ m ≤ 1.5 mm.

11. The printhead assembly according to claim 1, characterized in that, The side of the boss structure away from the mounting plate is the paper guide surface, and the side of the print head away from the mounting plate is the printing surface. The distance between the paper guide surface and the mounting surface along the second direction is n1, and the distance between the printing surface and the mounting surface along the second direction is n2. The second direction is parallel to the thickness direction of the mounting plate. Where n1 < n2, or n2 < n1.

12. The printhead assembly according to claim 11, characterized in that, 0.001 mm ≤ |n2-n1 ≤ 0.2 mm.

13. A label printer, characterized in that, It includes a body and a printhead assembly as described in any one of claims 1 to 12, the printhead assembly being mounted on the body.

14. The label printer according to claim 13, characterized in that, The machine body has a paper tray for receiving label paper tubes, the printhead assembly is located outside the paper tray, the mounting plate is connected to the machine body, and the printhead is located on the side of the mounting plate facing the paper tray.

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