A printer

Abstract

The application provides a printer, which comprises a rubber roller and a printing head, the printing head has a heating plane and a rotation axis, the heating plane is provided with a heating line body, the printing head can rotate around the rotation axis to be close to or away from the rubber roller, the printing head cooperates with the rubber roller and can load printing media with different thicknesses; in the case that the heating plane contacts the rubber roller, the heating plane is in linear contact with the rubber roller and forms a first contact line; wherein the rotation axis is located on the heating plane; or the rotation axis is located on one side of the heating plane, and the distance between the rotation axis and the heating plane is X, the distance between the projection of the rotation axis on the heating plane and the first contact line is L, and 0X≤1 / 3L. Through the application, the printing clarity can be effectively improved when printing printing media with different thicknesses.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing equipment, in particular to a printer. BACKGROUND

[0002] When the printer prints the printing medium such as heat-sensitive label paper, the printing medium is clamped between the print head and the rubber roller of the printer. The heating wire body is arranged on the print head, which can heat the printing medium to realize the printing of information.

[0003] In the related art, when the printer prints the printing medium with different thicknesses, the printing clarity is insufficient. SUMMARY

[0004] The present application provides a printer, which can effectively improve the printing clarity when printing the printing medium with different thicknesses.

[0005] The printer provided by the present application comprises:

[0006] a rubber roller; and

[0007] a print head having a heating plane and a rotation axis, the heating plane being provided with a heating wire body, the print head being capable of rotating around the rotation axis to approach or move away from the rubber roller, the print head cooperating with the rubber roller to load the printing medium with different thicknesses; in the case that the heating plane contacts the rubber roller, the heating plane linearly contacts the rubber roller to form a first contact line;

[0008] wherein the rotation axis is located on the heating plane, or the rotation axis is located on one side of the heating plane, and the distance between the rotation axis and the heating plane is X, the distance between the projection of the rotation axis on the heating plane and the first contact line is L, and 0X≤1 / 3L.

[0009] The scheme provided by the embodiments of the present application can control the offset degree of the heating wire body and the first contact line within a suitable range when printing the printing medium with different thicknesses, so that the heating wire body and the first contact line at least partially coincide, avoiding the complete misalignment of the first contact line and the heating wire body, thereby improving the printing clarity.

[0010] In some possible implementation manners, the heating wire body is closer to the rotation axis than the first contact line.

[0011] In some possible implementation manners, the distance between the heating wire body and the first contact wire is greater than or equal to 0.01 mm and less than or equal to 0.2 mm.

[0012] In some possible implementation manners, the heating wire body is in a strip structure, and a width of the heating wire body is greater than or equal to 0.3 mm and less than or equal to 0.8 mm.

[0013] In some possible implementation manners, the heating wire body is farther away from the rotation axis than the first contact wire, and the distance between the heating wire body and the first contact wire is greater than 0 and less than or equal to 0.1 mm.

[0014] In some possible implementation manners, the printing head comprises:

[0015] a rotation shaft having the rotation axis,

[0016] a support frame rotationally connected to the rotation shaft;

[0017] a mounting plate rotationally connected to the rotation shaft and capable of rotating relative to the support frame, the mounting plate having the heating plane;

[0018] a resilient member arranged between the support frame and the mounting plate;

[0019] In a case where the heating plane is in contact with the rubber roller, the mounting plate is capable of compressing the resilient member and rotating around the rotation axis towards the support frame.

[0020] In some possible implementation manners, the support frame is provided with a first protrusion on a side close to the mounting plate.

[0021] The mounting plate is provided with a second protrusion on a side close to the support frame.

[0022] One end of the resilient member is connected to the first protrusion, and the other end is connected to the second protrusion.

[0023] In some possible implementation manners, the resilient member is provided in a plurality of numbers, and the plurality of resilient members are symmetrically arranged about a symmetry plane.

[0024] The symmetry plane is a plane perpendicular to the rotation axis and passing through a geometric center of the mounting plate.

[0025] In some possible implementation manners, the mounting plate is provided with a waist-shaped hole penetrating the rotating shaft, and a length direction of the waist-shaped hole is perpendicular to the heating wire body.

[0026] In some possible implementation manners, the printer further includes:

[0027] a support, which is rotationally connected with the print head; the print head has a stowed position and a printing position relative to the support;

[0028] a driving member, which is configured to drive the print head to switch from the stowed position to the printing position;

[0029] a reset elastic member, which is arranged between the print head and the support, and is configured to drive the print head to reset from the printing position to the stowed position when the driving member is separated from the print head.

[0030] In some possible implementation manners, the reset elastic member is a torsion spring, one end of the torsion spring is sleeved on one end of the rotating shaft, and the other end of the torsion spring abuts against the support.

[0031] In some possible implementation manners, when the print head is in the printing position, the driving member is in linear contact with the support and forms a second contact line.

[0032] The second contact line is parallel to the heating wire body. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a partial structural schematic diagram of a printer provided by an embodiment of the present application;

[0034] Figure 2 is Figure 1 a right view of the printer without the driving member;

[0035] Figure 3 is Figure 1 a structural schematic diagram of the print head in the printer;

[0036] Figure 4 is Figure 3 an exploded structural schematic diagram of the print head;

[0037] Figure 5 is Figure 3 a bottom view of the print head without the support;

[0038] The following is a description of the reference signs in the drawings:

[0039] 100 – printer;

[0040] 1—rubber roller; 11—first contact line;

[0041] 2—Print head;

[0042] 21—Mounting plate; 210—Heating plane; 211—Heating wire; 212—Second protrusion; 213—Oval hole;

[0043] 22—shaft; 220—axis of rotation;

[0044] 23—Support frame; 231—First protrusion;

[0045] 24—Elastic element;

[0046] 3—Drive components;

[0047] 4—Reset elastic element;

[0048] L—plane of symmetry; X—length direction of the oblong hole. Detailed Implementation

[0049] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0051] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0052] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0053] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0054] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0055] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0056] When a printer prints on thermal label paper or other printing media, the printing media is sandwiched between the printer's print head and the printing roller. The print head is equipped with heating elements that heat the printing media, thereby enabling the printing of information.

[0057] In related technologies, printers are prone to insufficient print clarity when printing on media of different thicknesses.

[0058] To address the aforementioned technical problems, this application provides a printer. The following is a detailed description of one embodiment of this application with reference to the accompanying drawings.

[0059] Please refer to Figure 1 and Figure 2 This application discloses a printer 100 comprising a rubber roller 1 and a print head 2. The print head 2 has a heating plane 210 and a rotation axis 220. The heating plane 210 is provided with heating lines 211. The print head 2 is capable of rotating around the rotation axis 220 to move closer to or further away from the rubber roller 1. The print head 2 cooperates with the rubber roller 1 to load printing media of different thicknesses. When the heating plane 210 is in contact with the rubber roller 1, the heating plane 210 and the rubber roller 1 make line contact and form a first contact line 11. The rotation axis 220 is located on the heating plane 210; or, the rotation axis 220 is located on one side of the heating plane 210, and the distance between the rotation axis 220 and the heating plane 210 is X, and the distance between the projection of the rotation axis 220 on the heating plane 210 and the first contact line 11 is L, where 0 < X ​​≤ 1 / 3L.

[0060] First, it should be noted that printers in related technologies, in order to adapt to printing media of different thicknesses, have a similar structure to the printer in this application; see [link to related technology]. Figure 1 and Figure 2 The printhead 2 can rotate relative to the roller 1 about the rotation axis 220. Therefore, the movement trajectory of the heating line 211 on the printhead 2 is arc-shaped. Before the printing medium is loaded between the printhead 2 and the roller 1, the heating plane 210 on the printhead 2 makes line contact with the roller 1 and forms the first contact line 11.

[0061] The applicant's research found that, please continue to see... Figure 2 After the printing medium is loaded between the print head 2 and the roller 1, the printing medium causes the print head 2 to rotate away from the roller 1. This causes the heating wire 211 on the print head 2 to shift relative to the first contact wire 11, and the shift increases with the thickness of the printing medium. When the shift exceeds a certain critical value, the printer will experience insufficient print sharpness. In other words, when using printing media within a certain thickness range, such as 0.025mm to 0.12mm, the printer will not experience insufficient sharpness. However, when using printing media thicker than this range, such as those thicker than 0.12mm, the printer will experience insufficient sharpness, and the sharpness will decrease further with increasing thickness until it fails to meet the usage requirements.

[0062] The applicant's further research revealed that, for printing media of the same thickness, the distance between the rotation axis 220 of the printhead 2 and the heating plane 210 on the printhead 2 affects the printer's print clarity.

[0063] The applicant, through in-depth analysis of the underlying reasons, discovered that the distance between the heating wire 211, which is positioned on the heating plane 210, and the rotation axis 220 of the print head 2, and the heating plane 210 on the print head 2 determines the radius of rotation between the heating wire 211 on the heating plane 210 and the rotation axis 220. The larger this radius of rotation, the greater the degree of offset of the heating wire 211 relative to the first contact line 11. This radius of rotation is jointly determined by the distance X between the rotation axis 220 and the heating plane 210, the projection of the rotation axis 220 onto the heating plane 210, and the distance L between the first contact line 11.

[0064] For example, if the distance L between the projection of the rotation axis 220 on the heating plane 210 and the first contact line 11 is 45mm, for a printing medium with a thickness of 0.2mm, under the condition that other conditions remain unchanged, when the distance between the rotation axis 220 of the print head 2 and the heating plane 210 on the print head 2 is 1 / 9L, i.e. 5mm, after loading the printing medium, the distance by which the heating line 211 is offset relative to the first contact line 11 is 0.04mm.

[0065] When the distance between the rotation axis 220 of the printhead 2 and the heating plane 210 on the printhead 2 is 1 / 3L, i.e. 15mm, after loading the printing medium, the distance by which the heating line 211 is offset relative to the first contact line 11 is 0.09mm.

[0066] It can be seen that, while keeping the distance L between the projection of the rotation axis 220 on the heating plane 210 and the first contact line 11 constant, as the distance between the rotation axis 220 of the print head 2 and the heating plane 210 on the print head 2 increases, that is, as the rotation radius between the heating line 211 on the heating plane 210 and the rotation axis 220 increases, the printing clarity of the printer will gradually decrease until it can no longer meet the usage requirements, resulting in insufficient printing clarity.

[0067] Based on the above research results, the present application preferably places the rotation axis 220 on the heating plane 210. In this way, the distance between the rotation axis 220 of the print head 2 and the heating plane 210 on the print head 2 is 0, and the rotation radius between the heating line 211 on the heating plane 210 and the rotation axis 220 is minimized. When loading the printing medium, the degree of offset of the heating line 211 relative to the first contact line 11 can be minimized, thereby obtaining the best printing effect.

[0068] However, considering the limitations of other conditions on the printer 100 in practical applications, such as the arrangement of other components, the present application can also set the rotation axis 220 on one side of the heating plane 210, and the distance between the rotation axis 220 and the heating plane 210 is X, and the distance between the projection of the rotation axis 220 on the heating plane 210 and the first contact line 11 is L, 0 < X ​​≤ 1 / 3L. In this way, although the distance between the rotation axis 220 of the print head 2 and the heating plane 210 on the print head 2 is 0, the increase in the rotation radius between the heating line 211 on the heating plane 210 and the rotation axis 220 is small. When loading the printing medium, the degree of offset of the heating line 211 relative to the first contact line 11 can be small, thereby making the offset of the heating line 211 relative to the first contact line 11 controllable, ensuring that the printer 100 does not have insufficient clarity during printing, and meeting the usage requirements of the printer 100.

[0069] In summary, the solution provided by the embodiments of this application, by setting the rotation axis 220 on the heating plane 210, or setting it on one side of the heating plane 210 and at a predetermined distance from the heating plane 210, can control the degree of offset between the heating line 211 and the first contact line 11 within a suitable range when printing on printing media of different thicknesses, so that the heating line 211 and the first contact line 11 at least partially overlap, avoiding the situation where the first contact line 11 and the heating line 211 are completely misaligned, thereby improving the clarity of printing.

[0070] See Figure 2 and Figure 3 Considering that the first contact line 11 will shift towards the rotation axis 220 after the printing media is loaded between the print head 2 and the roller 1, in some embodiments, the heating line 211 is closer to the rotation axis 220 than the first contact line 11. That is, before loading the printing media, the heating line 211 is pre-staggered from the first contact line 11 by a certain distance. In this way, after loading the printing media, the first contact line 11 will shift towards the rotation axis 220, compensating for the pre-staggered distance, so that after loading the printing media, the heating line 211 is closer to the first contact line 11, thereby further improving the printing clarity.

[0071] Since there are many types of printing media thicknesses, such as 0.025mm, 0.04mm, 0.05mm, 0.08mm, 0.1mm, 0.12mm, 0.15mm, etc., when the heating wire 211 is set closer to the rotation axis 220 than the first contact wire 11, the distance between the heating wire 211 and the first contact wire 11 needs to be set reasonably to prevent overcompensation.

[0072] Considering that if the distance between the heating line 211 and the first contact line 11 is too large compared to the thickness of commonly used printing media, then after loading a thinner printing medium between the print head 2 and the roller 1, the offset of the first contact line 11 towards the rotation axis 220 will be too small compared to the distance between the heating line 211 and the first contact line 11. In this case, the heating line 211 cannot get closer to the first contact line 11, which will lead to insufficient printing clarity. Therefore, in some embodiments, the distance between the heating line 211 and the first contact line 11 can be greater than or equal to 0.01 mm and less than or equal to 0.2 mm. For example, it can be 0.01 mm, 0.02 mm, 0.025 mm, 0.04 mm, 0.05 mm, 0.08 mm, 0.1 mm, 0.12 mm, 0.15 mm, 0.18 mm, 0.2 mm, etc. In this way, offset compensation for commonly used thickness printing media can be met, effectively avoiding insufficient printing clarity.

[0073] Considering that a width greater than 0.8mm would result in lower print resolution, while a width less than 0.3mm would make it difficult to eliminate the impact of significant offset between the heating line 211 and the first contact line 11 on print clarity, in this embodiment, the heating line 211 is a long strip structure with a width greater than or equal to 0.3mm and less than or equal to 0.8mm. For example, it can be 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, or 0.8mm. This not only ensures a high print resolution but also guarantees that the first contact line 11 at least partially overlaps with the heating line 211 even with significant offset, further reducing the impact of the offset on print clarity.

[0074] In practical applications, the heating line 211 of the printhead 2 and the first contact line 11 of the roller 1 may shift due to the influence of processing accuracy and assembly errors. To reduce the impact of this shift on print clarity, in some embodiments of this application, the amount of shift is controlled. That is, in some embodiments, the heating line 211 is controlled to be further away from the rotation axis 220 than the first contact line 11. Meanwhile, considering that the first contact line 11 will shift towards the rotation axis 220 after the printing medium is loaded between the printhead 2 and the roller 1, and due to the uncertainty of processing accuracy and assembly errors, to avoid excessive shift between the heating line 211 and the first contact line 11, affecting the print clarity of the printer 100, embodiments of this application also limit the distance between the heating line 211 and the first contact line 11 when controlling the heating line 211 to be further away from the rotation axis 220. The distance between them is controlled to be within a small range. Specifically, the distance between the heating line 211 and the first contact line 11 is greater than 0 and less than or equal to 0.1 mm. For example, the thickness can be 0.01mm, 0.02mm, 0.03mm, 0.05mm, 0.06mm, 0.08mm, 0.1mm, etc. This reduces the impact of machining accuracy and assembly errors, improves the printing clarity of the printer 100, and prevents excessive offset between the heating line 211 and the first contact line 11, which could affect the printing clarity of the printer 100.

[0075] The printhead 2 can have various structural forms. See [link / reference] Figure 4 In some embodiments, the printhead 2 may include a rotating shaft 22, a support frame 23, a mounting plate 21, and an elastic element 24. The rotating shaft 22 has a rotation axis 220, and the support frame 23 is rotatably connected to the rotating shaft 22. The mounting plate 21 is rotatably connected to the rotating shaft 22 and can rotate relative to the support frame 23. The mounting plate 21 has a heating surface 210. The elastic element 24 is disposed between the support frame 23 and the mounting plate 21. When the heating surface 210 contacts the rubber roller 1, the mounting plate 21 can compress the elastic element 24 and rotate about the rotation axis 220 towards the support frame 23. The elastic element 24 may be a tension spring, compression spring, sheet spring, rubber spring, etc. Before loading the printing media, the mounting plate 21 can contact the rubber roller 1 under the elastic force of the elastic element 24. After loading the printing media, the mounting plate 21 can cooperate with the rubber roller 1 to clamp the printing media under the elastic force of the elastic element 24. When printing media of different thicknesses are placed between the rubber roller 1 and the mounting plate 21, the elastic element 24 can automatically extend and retract adaptively, thereby moving the mounting plate 21 closer to or further away from the support frame 23, ensuring that printing media of different thicknesses are in the appropriate position between the print head 2 and the rubber roller 1.

[0076] SeeFigure 4 and Figure 5 In some embodiments, the support frame 23 has a first protrusion 231 on the side near the mounting plate 21; the mounting plate 21 has a second protrusion 212 on the side near the support frame 23; one end of the elastic member 24 is connected to the first protrusion 231 and the other end is connected to the second protrusion 212.

[0077] It is understandable that the first protrusion 231 on the support frame 23 and the second protrusion 212 on the mounting plate 21 provide a mounting base for the elastic element 24. The first protrusion 231 and the second protrusion 212 can have various structural forms, and their structures can be the same or different. For example... Figure 4 and Figure 5 As shown, when the elastic element 24 is a telescopic spring, the first protrusion 231 can be an outwardly convex arc-shaped structure, and the second protrusion 212 can be an outwardly convex cross-shaped structure. The outer contours of the first protrusion 231 and the second protrusion 212 are both adapted to the inner diameter of the telescopic spring. Therefore, one end of the elastic element 24 can be sleeved on the first protrusion 231, and the other end can be fastened to the second protrusion 212, realizing the effective positioning and reliable connection of the elastic element 24 between the support frame 23 and the mounting plate 21.

[0078] In some embodiments, the number of elastic elements 24 is multiple, and the multiple elastic elements 24 are symmetrically arranged about a plane of symmetry L; wherein, the plane of symmetry L is a plane perpendicular to the rotation axis 220 and passing through the geometric center of the mounting plate 21. The number of elastic elements 24 can be... Figure 4 The figure shows four, but it can also be two, six, eight, etc. Designers can flexibly set the number of elastic elements 24 according to actual needs.

[0079] This embodiment of the application, by symmetrically arranging multiple elastic elements 24, ensures that the mounting plate 21 is subjected to uniform force, which can avoid uneven pressure on the printing medium between the print head 2 and the printer, thus preventing uneven printing density and preventing inconsistent printing density of the printer 100, thereby further improving the printing effect of the printer 100.

[0080] Due to installation errors and other reasons, the rubber roller 1 of the printer 100 may tilt relative to the mounting plate 21, thereby affecting the printing quality of the printer 100. To mitigate the impact of the rubber roller 1's tilt on printing quality, in some embodiments, the mounting plate 21 is provided with a waist-shaped hole 213 passing through the rotating shaft 22. The length direction X of the waist-shaped hole 213 is perpendicular to the heating line 211. The fact that the length direction X of the waist-shaped hole 213 is perpendicular to the heating line 211 ensures that the mounting plate 21 is adjusted in a direction perpendicular to the heating line 211. The length of the waist-shaped hole 213 can be determined based on the travel distance of the rotating shaft 22 caused by the tilt of the rubber roller 1.

[0081] This embodiment of the application can adaptively adjust the relative position of the mounting plate 21 and the rubber roller 1 under the action of the elastic member 24, so that the mounting plate 21 and the rubber roller 1 are in close contact, thereby making the heating wire 211 on the mounting plate 21 parallel to the first contact line 11, and automatically improving the impact of the tilt of the rubber roller 1 on the printing quality. For example, see Figure 4 When the left side of the rubber roller 1 tilts upward, the left side of the mounting plate 21 will be lifted upward under the action of the elastic element 24 and come into contact with and adhere to the rubber roller 1, so that the heating line 211 on the mounting plate 21 is parallel to the first contact line 11, effectively improving the impact of the tilt of the rubber roller 1 on the printing quality.

[0082] See Figure 1 In some embodiments, the printer 100 may further include a bracket (not shown), a drive member 3, and a reset elastic member 4. The bracket is rotatably connected to the print head 2; the print head 2 has a retracted position and a printing position relative to the bracket; the drive member 3 is used to drive the print head 2 to switch from the retracted position to the printing position; the reset elastic member 4 is disposed between the print head 2 and the bracket so as to drive the print head 2 to reset from the printing position to the retracted position when the drive member 3 disengages from the print head 2.

[0083] The bracket provides a mounting base for the print head 2, which can rotate relative to the bracket. When the printer 100 is in the power-off reset state, the print head 2 is in the retracted position, separated from the rubber roller 1 and moved away from the rubber roller 1 by a preset distance. When the printer 100 is in the printing state, the print head 2 is in the printing position and cooperates with the rubber roller 1 to hold the printing medium. The drive component 3 can have various structural forms, for example, it can be... Figure 3 The cam-like structure shown can also be replaced by a chain drive mechanism, gear drive mechanism, etc. The drive element 3 can be driven by a power source such as a motor or cylinder. The reset elastic element 4 is used to apply a restoring force to the print head 2 after printing is completed and the drive element 3 disengages from the print head 2, so that the print head 2 returns to the retracted position from the printing position.

[0084] The reset elastic element 4 can be a torsion spring, which is sleeved on one end of the rotating shaft 22. One end of the torsion spring presses against the bracket, and the other end presses against the print head 2. Thus, when the driving element 3 disengages from the print head 2, it can drive the print head 2 to reset from the printing position to the retracted position. The torsion spring being sleeved on one end of the rotating shaft 22 allows it to be located at the edge of the print head 2, facilitating its installation.

[0085] As described above, the printhead 2 includes a mounting plate 21 and a support frame 23. The mounting plate 21 and the support frame 23 are rotatably connected, and an elastic element 24 is provided between them. Theoretically, the other end of the torsion spring can press against either the mounting plate 21 or the support frame 23. However, considering that the mounting plate 21 and the support frame 23 are rotatably connected, and that an elastic element 24 is provided between the support frame 23 and the mounting plate 21, if the other end of the torsion spring presses against the mounting plate 21, when the printhead 2 is in the printing position, the elastic force exerted by the other end of the torsion spring on the mounting plate 21 will offset part of the elastic force exerted by the elastic element 24 on the mounting plate 21. This results in the elastic force exerted by the elastic element 24 on the side of the mounting plate 21 closer to the torsion spring being less than the elastic force exerted by the elastic element 24 on the side of the mounting plate 21 farther from the torsion spring. Consequently, the pressure between the mounting plate 21 and the roller 1 becomes uneven, thus affecting the printing effect of the printer 100. If the other end of the torsion spring is pressed against the support frame 23, the support frame 23 of the print head 2, located at the printing position, can be reliably supported by the drive member 3, thus avoiding the influence of the elastic force applied to the support frame 23 by the other end of the torsion spring. Therefore, see Figure 1 In some embodiments of this application, the other end of the torsion spring is arranged to press against the support frame 23. In this way, the normal operation of the elastic element 24 can be avoided, so that the printer 100 can obtain better printing results.

[0086] See Figure 1 In some embodiments, when the print head 2 is in the printing position, the drive member 3 makes line contact with the support frame 23 and forms a second contact line; the second contact line is parallel to the heating line 211.

[0087] It is understandable that during the process of the drive component 3 driving the print head 2 to switch from the retracted position to the printing position, a force is applied to the print head 2 specifically through contact with the support frame 23. For example... Figure 1 As shown, the drive unit 3 drives the support frame 23 to lift, thereby moving the print head 2 to the printing position.

[0088] In this embodiment, when the print head 2 is in the printing position, making the second contact line between the drive member 3 and the support frame 23 parallel to the heating line 211 on the mounting plate 21 of the print head 2 can reduce the probability of the print head 2 tilting, thereby reducing the probability of the heating line 211 and the first contact line 11 on the rubber roller 1 being completely misaligned due to the tilt of the print head 2, effectively improving the printing clarity of the printer 100.

[0089] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0090] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A printer (100), characterized in that, include: Rubber roller (1); and The print head (2) has a heating plane (210) and a rotation axis (220). The heating plane (210) is provided with a heating line (211). The print head (2) can rotate around the rotation axis (220) to move closer to or away from the rubber roller (1). The print head (2) cooperates with the rubber roller (1) and can load printing media of different thicknesses. When the heating plane (210) is in contact with the rubber roller (1), the heating plane (210) makes line contact with the rubber roller (1) and forms a first contact line (11). Before loading the printing medium, the heating wire (211) is offset from the first contact wire (11); The distance between the rotation axis (220) and the heating plane (210) is 0; or, the rotation axis (220) is located on one side of the heating plane (210), and the distance between the rotation axis (220) and the heating plane (210) is X, and the distance between the projection of the rotation axis (220) on the heating plane (210) and the first contact line (11) is L, 0 < X ​​≤ 1 / 3L.

2. The printer (100) according to claim 1, characterized in that, The heating wire (211) is closer to the rotation axis (220) than the first contact wire (11).

3. The printer (100) according to claim 2, characterized in that, The distance between the heating wire (211) and the first contact wire (11) is greater than or equal to 0.01 mm and less than or equal to 0.2 mm.

4. The printer (100) according to claim 2, characterized in that, The heating wire (211) is a long strip structure, and the width of the heating wire (211) is greater than or equal to 0.3 mm and less than or equal to 0.8 mm.

5. The printer (100) according to claim 1, characterized in that, The heating wire (211) is further away from the rotation axis (220) than the first contact wire (11), and the distance between the heating wire (211) and the first contact wire (11) is greater than 0 and less than or equal to 0.1 mm.

6. The printer (100) according to claim 1, characterized in that, The print head (2) includes: The rotating shaft (22) has the said rotation axis (220). The support frame (23) is rotatably connected to the rotating shaft (22); Mounting plate (21) is rotatably connected to the rotating shaft (22) and is rotatable relative to the support frame (23). Mounting plate (21) has the heating plane (210). An elastic element (24) is disposed between the support frame (23) and the mounting plate (21); When the heating plane (210) is in contact with the rubber roller (1), the mounting plate (21) can compress the elastic element (24) and rotate about the rotation axis (220) toward the support frame (23).

7. The printer (100) according to claim 6, characterized in that, The support frame (23) has a first protrusion (231) on the side near the mounting plate (21). The mounting plate (21) has a second protrusion (212) on the side near the support frame (23). One end of the elastic element (24) is connected to the first protrusion (231), and the other end is connected to the second protrusion (212).

8. The printer (100) according to claim 6, characterized in that, The number of elastic elements (24) is multiple, and the multiple elastic elements (24) are symmetrically arranged about the plane of symmetry (L); The plane of symmetry (L) is a plane that is perpendicular to the axis of rotation (220) and passes through the geometric center of the mounting plate (21).

9. The printer (100) according to claim 6, characterized in that, The mounting plate (21) is provided with an oblong hole (213) through which the rotating shaft (22) passes, and the length direction (X) of the oblong hole (213) is perpendicular to the heating wire (211).

10. The printer (100) according to claim 6, characterized in that, The printer (100) also includes: The bracket is rotatably connected to the print head (2); the print head (2) has a retracted position and a printing position relative to the bracket; A drive unit (3) is used to drive the print head (2) to switch from the retracted position to the printing position; A reset elastic element (4) is disposed between the print head (2) and the bracket to drive the print head (2) to reset from the printing position to the retracted position when the drive element (3) disengages from the print head (2).

11. The printer (100) according to claim 10, characterized in that, The reset elastic element (4) is a torsion spring, which is sleeved on one end of the rotating shaft (22). One end of the torsion spring presses against the bracket, and the other end presses against the support frame (23).

12. The printer (100) according to claim 10, characterized in that, When the print head (2) is in the printing position, the drive member (3) makes line contact with the support frame (23) and forms a second contact line; The second contact line is parallel to the heating wire body (211).

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