Printing mechanism and printer

Abstract

The present invention provides a printing mechanism and a printer, which relates to the technical field of printing devices, and includes: a machine cover, a machine body, a print head, a paper pressing roller, a cutting device and a positioning mechanism; the positioning mechanism comprises: a positioning component and a limiting component; the positioning component comprises a first positioning component arranged on the print head and a second positioning component arranged on the other side of the machine cover and the machine body, the second positioning component is arranged to abut against the first positioning component to limit the movement tendency of the print head toward the downstream side; the limiting component comprises a first limiting component arranged on one side of the machine cover and the machine body, and a second limiting component arranged on the other side of the machine cover and the machine body, the second limiting component is arranged to abut against the first limiting component to limit the movement tendency of one side of the machine cover and the machine body toward the upstream side, so as to avoid the machine cover or the machine body driving the print head to move, so as to achieve the purpose of stabilizing the pressure contact line between the print head and the paper pressing roller.

Description

Technical Field

[0001] The present invention relates to the technical field of printing devices, and in particular to a printing mechanism and a printer thereof. Background Art

[0002] With the popularization of self-service equipment, more and more self-service equipment is equipped with a printing mechanism, and the printing mechanism needs to have an automatic paper cutting structure to facilitate users to take out the printed paper.

[0003] The current printer mechanism only needs to leave a space slightly larger than the printing width above the printer mechanism, so that the product can be quickly opened and closed, which is convenient for changing paper and eliminating printer mechanism failures. The printer mechanism sets the cover and the body independently, and the pressure roller and the print head are respectively set on the cover or the body. When the cover and the body are closed, the pressure contact between the pressure roller and the print head is used to record the content on the recording medium. In order to achieve the printing effect, the print head is set in a movable manner so that the pressure contact between the print head and the pressure roller is uniform. In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: during the printing process, when the print head is subjected to external force, it will move in an unexpected direction relative to the pressure roller, thereby causing fluctuations in printing quality. Summary of the invention

[0004] The invention discloses a printer mechanism, aiming to improve the problem that a print head moves in an unexpected direction relative to a paper pressing roller during printing.

[0005] The present invention adopts the following scheme:

[0006] In a first aspect, the present invention provides a printing mechanism, comprising: a machine cover, a machine body, a print head, a paper pressing roller, a cutting device and a positioning mechanism; the print head is used to print recording media and is swingably arranged on one side of the machine cover and the machine body under external force; the paper pressing roller is in pressure contact with the print head and is arranged on the other side of the machine cover and the machine body; the cutting device comprises: a fixed blade and a movable blade; the fixed blade is arranged on the downstream side of the conveying direction of the recording medium relative to the print head; the movable blade is movably arranged relative to the fixed blade, and is arranged to be closely spaced relative to the fixed blade on the downstream side of the fixed blade so as to be able to move in a certain direction when there is a movement. The recording medium is cut under the contact state of pressure; the positioning mechanism comprises: a positioning member and a limiting member; the positioning member comprises a first positioning member arranged on the print head and a second positioning member arranged on the other side of the machine cover and the machine body, the second positioning member is arranged to abut the first positioning member to limit the movement tendency of the print head to the downstream side; the limiting member comprises a first limiting member arranged on one side of the machine cover and the machine body, and a second limiting member arranged on the other side of the machine cover and the machine body, the second limiting member is arranged to abut the first limiting member to limit the movement tendency of one side of the machine cover and the machine body to the upstream side.

[0007] As a further improvement, one end of the cover in the lateral direction is hinged to the body, and the other end is fastened to the body in a detachable manner relative to the body; the print head includes a mounting frame, a thermal component fixed to the mounting frame, and a first elastic component, the first elastic component is arranged between the cover and the mounting frame to generate pressure between the print head and the horizontally placed paper pressing roller when the cover is fastened to the body; wherein the lateral direction is perpendicular to the conveying direction.

[0008] As a further improvement, the first limiting component includes two protrusions formed on the machine cover and protruding laterally, and the second limiting component includes two recessed portions formed on the body and capable of respectively abutting against one of the protrusions; the upstream end of the protrusion abuts against the recessed portion when the machine cover is fastened to the body, so as to limit the movement tendency of the machine cover when the movable blade is in pressure contact with the fixed blade; wherein the downstream end of the protrusion is clearance-matched with the recessed portion.

[0009] As a further improvement, the body includes two support walls arranged at both ends in the horizontal direction and respectively having a recessed portion, and the paper pressing roller is rotatably supported on the two support walls by shaft sleeves arranged at both ends thereof; wherein the shaft sleeves are fixed on the support walls; the cover includes two side walls arranged at both ends in the horizontal direction and respectively having a protruding portion, the two side walls are integrally formed, the two support walls are integrally formed, and the protruding portion is inserted into the recessed portion when the cover is buckled with the body.

[0010] As a further improvement, each of the recessed portions is provided with guiding portions at the end edges of both ends in the conveying direction, and the protruding portion can be inserted into the recessed portion under the guidance of the guiding portions.

[0011] As a further improvement, the first limiting component includes two protrusions formed on the upper side of the fuselage and protruding laterally, and the second limiting component includes two recessed portions formed on the cover and capable of respectively abutting against one of the protrusions; the downstream end of the recessed portion abuts against the protrusion when the cover is fastened to the fuselage, so as to limit the movement tendency of the cover when the movable blade is in pressure contact with the fixed blade; wherein the upstream end of the protrusion and the recessed portion are clearance-matched.

[0012] As a further improvement, the first positioning component includes two positioning protrusions formed on the mounting frame and protruding laterally, and the second positioning component includes two positioning recesses formed on the body, each used to abut against a positioning protrusion; when the cover is fastened to the body, the downstream end of the positioning protrusion can abut against the positioning recess when the paper pressing roller rotates, so as to limit the movement tendency of the mounting frame toward the downstream side.

[0013] As a further improvement, the fixed blade is swingably supported on the machine cover by a second elastic component arranged between the fixed blade and the machine cover, the fixed blade is provided with pivot arms at both lateral ends, and the machine cover is provided with pivot grooves at both lateral ends connected to the pivot arms to limit the swing range of the fixed blade.

[0014] As a further improvement, the machine cover includes two side walls arranged at both ends in the horizontal direction, and the two side walls are provided with clearance grooves. The two positioning protrusions are respectively inserted into a clearance groove, and the downstream ends of the positioning protrusions are loosely matched with the clearance grooves so that the movable print head can be supported on the machine body.

[0015] In a second aspect, the present invention further provides a printer mechanism, comprising: a machine cover, a machine body, a print head, a paper pressing roller, a cutting device and a positioning mechanism; the print head is used to print recording media and is swingably arranged on one side of the machine cover and the machine body under external force; the paper pressing roller is in pressure contact with the print head and is arranged on the other side of the machine cover and the machine body; the recording medium cutting device comprises: a fixed blade and a movable blade; the fixed blade is arranged on the downstream side of the conveying direction of the recording medium relative to the print head; the movable blade is movably arranged relative to the fixed blade, and is arranged to be closely spaced relative to the fixed blade on the upstream side of the fixed blade so as to The recording medium is cut in a contact state with pressure; the positioning mechanism comprises: a positioning member and a limiting member; the positioning member comprises a first positioning member arranged on the print head and a second positioning member arranged on the other side of the machine cover and the body, the second positioning member is arranged to abut against the first positioning member to limit the movement tendency of the print head toward the downstream side; the limiting member comprises a first limiting member arranged on one side of the machine cover and the body, and a second limiting member arranged on the other side of the machine cover and the body, the second limiting member is arranged to abut against the first limiting member to limit the movement tendency of one side of the machine cover and the body toward the downstream side.

[0016] In a third aspect, the present invention further provides a printer comprising any of the above-mentioned printer mechanisms.

[0017] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0018] The printer mechanism in the above scheme is provided with a first positioning component configured on the print head and a second positioning component arranged in coordination therewith, wherein the second positioning component is located on the machine body, so that when the cover is closed, the second positioning component can abut against the first positioning component to limit the movement of the print head with the first positioning component to the downstream side (the conveying direction of the recording medium), wherein during printing, the platen roller conveys the recording medium to the downstream side, and the second positioning component abuts against the first positioning component to limit the movement of the print head to the downstream side, thereby preventing the print head from continuing to deviate following the recording medium, ensuring that the print head is always in the printing position during the printing process, and achieving accurate positioning and printing. The second limiting component of the limiting component is arranged to abut against the first limiting component when the cover is closed, so as to limit the movement tendency of the machine cover to the upstream side (opposite to the conveying direction of the recording medium), so that when the movable blade contacts the fixed blade to cut the recording medium under pressure, the force transmitted to the upstream side of the machine cover will not cause the machine cover to drive the print head to move along the upstream side relative to the machine body, thereby achieving the stability of the contact line between the print head and the platen roller.

[0019] Furthermore, the positioning member corresponds to limiting the movement of the print head to the downstream side, and the limiting member corresponds to limiting the movement of the cover and the body to the upstream side, and the first positioning member of the positioning member is arranged at the print head position, and the first limiting member / second limiting member of the limiting member is arranged on the side of the body, so as to ensure that the two members are arranged separately, not only when the cover and the body are closed, the cutting and printing positions are corrected, but also the consistency and reliability of positioning are always guaranteed. At the same time, since the first positioning member is arranged on the print head placed on the cover or the body, it will not affect the offset of the print head to the limit state (printing position) during normal operation, which is beneficial to the performance and life of the printer mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a schematic structural diagram of a printer mechanism according to an embodiment of the present invention at a first viewing angle;

[0022] Figure 2 yes Figure 1 A partial enlarged view of the middle I area;

[0023] Figure 3 is a schematic structural diagram of a printer mechanism according to an embodiment of the present invention at a second viewing angle;

[0024] Figure 4 1 is a schematic diagram of the structure of a cover of a printer mechanism according to an embodiment of the present invention, wherein the lower figure is a schematic diagram of partial disassembly;

[0025] Figure 5 is a schematic diagram of a partial disassembly of a cover of a printer mechanism according to an embodiment of the present invention from another viewing angle;

[0026] Figure 6 is a schematic structural diagram of a printer mechanism according to an embodiment of the present invention at a third viewing angle;

[0027] Figure 7 is a schematic structural diagram of a printer mechanism according to an embodiment of the present invention when the cover is closed;

[0028] Figure 8 yes Figure 7 Schematic diagram of the structure from another perspective.

[0029] Icons: 1-machine cover; 11-side wall; 12-upper frame; 13-pivot slot; 2-machine body; 21-support wall; 22-axis; 3-print head; 31-mounting frame; 32-thermal component; 33-first elastic component; 4-paper pressing roller; 5A-fixed blade; 5A1-pivot arm; 5B-movable blade; 5C-second elastic component; 6A-first positioning component; 6A1-positioning protrusion; 6B-second positioning component; 6B1-positioning recess; 7A-first limiting component; 7A1-protrusion; 7B-second limiting component; 7B1-recess; 7B2-guide; 8-hook; 81-plate; 82-double hook; 9-reset spring. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] Example

[0036] Combination Figures 1 to 8 One embodiment of the present invention provides a printing mechanism, including: a machine cover 1, a machine body 2, a print head 3, a paper pressing roller 4, a cutting device (not shown) and a positioning mechanism (not shown). The print head 3 is used to print the recording medium and is swingably arranged on the machine cover 1 under external force. The paper pressing roller 4 is in pressure contact with the print head 3 and is arranged on the machine body 2. The cutting device includes a fixed blade 5A and a movable blade 5B. The fixed blade 5A is arranged on the downstream side of the conveying direction of the recording medium relative to the print head 3. The movable blade 5B is movably arranged relative to the fixed blade 5A, and is arranged to be closely spaced relative to the fixed blade 5A on the downstream side of the fixed blade 5A to cut the recording medium in a contact state with pressure. In this embodiment, the positioning mechanism includes a positioning member (not shown) and a limiting member (not shown). The positioning member has a first positioning component 6A arranged on the print head 3 and a second positioning component 6B arranged on the machine body 2, and the second positioning component 6B is arranged to abut the first positioning component 6A to limit the movement tendency of the print head 3 to the downstream side. The limiting member includes a first limiting component 7A disposed on the hood 1 and a second limiting component 7B disposed on the body 2 . The second limiting component 7B is configured to abut against the first limiting component 7A to limit the movement tendency of the upstream side of the hood 1 .

[0037] In this embodiment, a first positioning component 6A is configured on the print head 3 and a second positioning component 6B is arranged in coordination therewith, wherein the second positioning component 6B is located on the cover 1 or the body 2 on the side opposite to the first positioning component 6A, so that when the cover is closed, the second positioning component 6B can abut against the first positioning component 6A to limit the movement of the print head 3 with the first positioning component 6A toward the downstream side (the conveying direction of the recording medium). During printing, the platen roller 4 conveys the recording medium toward the downstream side, and the second positioning component 6B abuts against the first positioning component 6A to limit the movement of the print head 3 toward the downstream side, thereby preventing the print head 3 from continuing to deviate following the recording medium, and ensuring that the print head 3 is always in the printing position during the printing process, so as to achieve precise positioning and printing. In addition, the second limiting component 7B of the limiting member is arranged to abut against the first limiting component 7A when the cover is closed, and to limit the movement tendency of one side of the machine cover 1 and the machine body 2 toward the upstream side (opposite to the direction of recording medium conveying). Based on the fact that the movable blade 5B is arranged to be able to be on the downstream side of the fixed blade 5A and closely spaced relative to the fixed blade 5A, it cuts the recording medium in a contact state with pressure, so that the movable blade provides the fixed blade 5A with a movement tendency to move along the upstream side. Under the abutment restriction of the second limiting component 7B, the first limiting component 7A is prevented from moving along the upstream side under the force generated by the cutting device during the cutting process, thereby ensuring that the print head arranged on the machine cover 1 will not move along the upstream side with the machine cover 1, thereby ensuring that during the printing process, the pressure contact line between the print head 3 and the paper pressing roller 4 remains stable.

[0038] It should be mentioned that the positioning component corresponds to limiting the movement of the print head 3 toward the downstream side, and the limiting component corresponds to limiting the movement of the machine cover 1 and the body 2 toward the upstream side, and the first positioning component 6A of the positioning component is arranged at the position of the print head 3, and the first limiting component 7A / the second limiting component of the limiting component is arranged at the body 2, thereby ensuring that the two components are arranged separately, which not only allows the contact line between the print head 3 and the platen roller 4 to be adjusted to maintain it at a preset pressure contact position when the machine cover 1 and the body 2 are closed, but also ensures that during operation, the print head 3 and the platen roller 4 remain stable at this position, so as to achieve the purpose of not causing the position of the contact line to change due to external force.

[0039] In one embodiment, one end of the cover 1 in the horizontal direction is hinged to the body 2, and the other end is fastened to the body 2. The print head 3 includes a mounting frame 31, a thermal component 32 fixed on the mounting frame 31, and a first elastic component 33. The first elastic component 33 is arranged between the cover 1 and the mounting frame 31, so that when the cover 1 is fastened to the body 2, pressure is generated between the print head 3 and the horizontally placed paper pressing roller 4, so that the mounting frame 31 is elastically arranged on the cover 1 in a swingable manner through the first elastic member. When the cover is closed and fastened, the paper pressing roller 4 presses and lifts the mounting frame 31, and when the recording medium is conveyed, the mounting frame 31 is driven to deviate to the printing position of the thermal component 32 along the downstream side, and the mounting frame 31 is swingably arranged on the cover 1 through the first elastic component 33, so that the thermal component 32 and the paper pressing roller 4 are in pressure contact. The transverse direction is perpendicular to the conveying direction, so that the cover 1 disposed at one end of the transverse direction is covered on the body 2 in a lateral hinged manner, and is closed with precise alignment through a positioning mechanism.

[0040] See also Figures 2 to 8 In one embodiment, the first limiting component 7A includes two protrusions 7A1 formed on the cover 1 along the lateral protrusions, and the second limiting component 7B includes two recessed portions 7B1 formed on the body 2 to be able to abut against a protrusion 7A1 respectively. The upstream end (one end along the upstream side) of the protrusion 7A1 abuts against the recessed portion 7B1 when the cover 1 is fastened to the body 2, so as to limit the movement tendency of the cover 1 when the movable blade 5B is in pressure contact with the fixed blade 5A. Among them, the downstream end of the protrusion 7A1 and the recessed portion 7B1 are clearance-matched. When the cover is closed, the protrusion 7A1 can only abut and fit against the groove wall of the recessed portion 7B1 along the upstream end. The cover 1 is fastened to the body 2, and the raised portion 7A1 is embedded in the recessed portion 7B1, the upstream end of the raised portion 7A1 is in contact with the recessed portion 7B1, and the downstream end of the raised portion 7A1 is in gap with the recessed portion 7B1. The upstream end of the raised portion 7A1 is in contact with the groove wall of the recessed portion 7B1, thereby limiting the movement of the raised portion 7A1 to the upstream side, and leaving a gap for movement along the downstream side, so that the raised portion 7A1 and the recessed portion 7B1 are always in an incompletely engaged state, so as to avoid the situation that the raised portion 7A1 cannot be completely engaged with the recessed portion 7B1 due to manufacturing errors. At least the first limiting portion 7A and the second limiting portion 7B can prevent the cover 1 and the body 2 from being offset in the direction of the force when the two cutters are in contact when the cutting device is in cutting operation, thereby preventing the cover 1 and the body 2 from offsetting in the direction of the force.

[0041] Correspondingly, the machine body 2 includes two support walls 21 arranged at two ends in the horizontal direction and respectively having a recessed portion 7B1, and the paper pressing roller 4 is rotatably supported on the two support walls 21 through shaft sleeves arranged at both ends. Among them, the shaft sleeve is fixed on the support wall 21. The paper pressing roller 4 is arranged at the position of the machine body 2 through the shaft sleeve, and the print head 3 is swingably arranged at the position of the machine cover 1 through the mounting frame 31, and when the cover is closed, the paper pressing roller 4 and the print head 3 cooperate to form a paper feeding channel for conveying recording media. In particular, the machine cover 1 includes two side walls 11 arranged at two ends in the horizontal direction and respectively having a raised portion 7A1, the two side walls 11 are integrally formed, and the two support walls 21 are integrally formed, and the raised portion 7A1 is inserted into the recessed portion 7B1 when the machine cover 1 is fastened to the machine body 2.

[0042] See also Figures 3 to 5 In other embodiments, the cover 1 is provided with an upper frame 12 in a rectangular frame, and the mounting frame 31 and the fixed blade 5A are both mounted on the upper frame 12. The two side walls 11 are respectively formed at the two side positions of the upper frame 12 in the lateral direction. It should be noted that the mounting frame 31 is mounted in the upper frame 12 in a hanging manner through the first elastic component 33, and under the elastic configuration of the first elastic component 33, the mounting frame 31 can be elastically offset as a whole along the upper and lower end surface and the front and rear directions relative to the upper frame 12.

[0043] Preferably, each recessed portion 7B1 is provided with a guide portion 7B2 at the edge of both ends in the conveying direction, and the protruding portion 7A1 can be inserted into the recessed portion 7B1 through the guide portion 7B2. The opening of the recessed portion 7B1 is provided with a guide portion 7B2 that facilitates the protruding portion 7A1 to enter the groove of the recessed portion 7B1, and the groove of the recessed portion 7B1 is relatively expanded. The guide portion 7B2 can guide the protruding portion 7A1 to slide when contacting it, so that the protruding portion 7A1 directly and smoothly enters the groove under the action of the guide portion 7B2, thereby completing a cabin closing and positioning action.

[0044] See also Figures 2 to 8In one embodiment, the first positioning component 6A includes two positioning protrusions 6A1 formed on the mounting frame 31 and protruding in the lateral direction, and the second positioning component 6B includes two positioning recesses 6B1 formed on the body 2 and used to abut against a positioning protrusion 6A1 respectively. When the cover 1 is fastened to the body 2, the downstream end of the positioning protrusion 6A1 can abut against the positioning recess 6B1 when the paper pressing roller 4 rotates, so as to limit the movement tendency of the mounting frame 31 to the downstream side. In this embodiment, the protrusion 7A1 and the recessed portion 7B1 of the limiting member limit the movement tendency along the upstream side, and position the cover 1 and the body 2 along the upstream direction to avoid pushing the cover 1 and the body 2 to be misaligned when cutting the recording medium. In coordination with this, the positioning protrusion 6A1 and the positioning recess 6B1 of the positioning component limit the movement tendency along the downstream side, position the print head 3 stably in the printing position along the downstream direction, and prevent the print head 3 from being deviated from the paper pressing roller 4 by force, thereby ensuring that during the printing process, the pressure contact line between the print head 3 and the paper pressing roller 4 remains stable.

[0045] In a preferred embodiment, the machine cover 1 includes two side walls 11 arranged at both ends in the horizontal direction, and a clearance groove (not shown) is opened on the two side walls 11. The two positioning protrusions 6A1 are respectively inserted into a clearance groove, and the downstream end of the positioning protrusion 6A1 is gap-matched with the clearance groove, so that during the printing process, when the platen roller 4 transports the recording medium to the downstream side, when the print head 3 is pushed by the platen roller 4, the thrust will not be transmitted to the machine cover 1, ensuring that during the printing process, the fixed blade 5A or the movable blade 5B arranged on the machine cover 1 will not follow the movement, so as to ensure the stability of the cutting position of the movable blade 5B and the fixed blade 5A.

[0046] In one embodiment, the raised portion 7A1 is in an arc shape with a gradually changing raised height from top to bottom, and the raised height of the raised portion 7A1 at the lower end is greater than the raised height of the upper end. When the cover is closed, the contact area between the raised portion 7A1 and the recessed portion 7B1 changes from large to small, which is conducive to the cover contact along the positioning direction, making the opening and closing of the cover more convenient. In particular, the raised portion 7A1 is protrudingly arranged on the side walls 11 on the left and right sides of the upper frame 12, and is consistent with the protruding direction of the positioning protrusion 6A1. Among them, the recessed portion 7B1 and the positioning recessed portion 6B1 are spaced apart from each other along the conveying direction, and are both located on the support walls 21 on the left and right sides of the fuselage 2. The limiting components and the positioning components are arranged at the same two side positions of the cover 1, and the protruding directions of the protrusions 7A1 / positioning protrusions 6A1 are roughly outward, so that the corresponding recessed portions 7B1 and positioning recessed portions 6B1 are arranged one by one on one side of the body 2 along the same straight line direction, and positioning mechanisms are arranged on the left and right sides of the cover 1 and the body 2, thereby achieving efficient and stable positioning and covering of the cover 1 and the body 2.

[0047] In one embodiment, the protrusion 7A1 is extended and arranged at the left and right end surfaces of the mounting frame 31, and the left and right sides of the fuselage 2 are correspondingly provided with a recessed portion 7B1. The horizontal height of the protrusion 7A1 is lower than the horizontal height of the positioning protrusion 6A1. The mounting frame 31 is assembled on the upper frame 12, and the horizontal height position of the protrusion 7A1 arranged on one side of the mounting frame 31 is higher than the horizontal height position of the positioning protrusion 6A1 extending and arranged on one side of the mounting frame 31. When closing the cover, the protrusion 7A1 with a low position height is embedded and matched with the recessed groove on the fuselage 2 to perform preliminary positioning, and then the positioning protrusion 6A1 with a high position height is embedded and matched with the positioning recessed portion 6B1 to accurately close the cover.

[0048] In one embodiment, the fixed blade 5A is swingably supported on the cover 1 by a second elastic component 5C disposed between the fixed blade 5A and the cover 1, and the fixed blade 5A is provided with pivot arms 5A1 at both ends in the horizontal direction, and the cover 1 is provided with pivot slots 13 at both ends in the horizontal direction, which are connected to the pivot arms 5A1 to limit the swing range of the fixed blade 5A. In addition, the fixed blade 5A and the mounting frame 31 are spaced apart and do not interfere with each other.

[0049] Combined with the picture Figure 2 , Figure 4 and Figure 5 In the present embodiment, a printing mechanism is provided, including: a machine cover 1 and a machine body 2. One end of the machine cover 1 in the lateral direction is hinged to the machine body 2, and the other end is fastened to the machine body 2. It also includes a fastening mechanism (not shown) and a positioning mechanism. The fastening mechanism includes a hook portion 8 arranged on the machine cover 1, and the machine body 2 is correspondingly provided with a shaft portion 22 that cooperates with the hook portion 8. When the machine cover 1 is covered on the machine body 2, the hook portion 8 is operable to rotate to hook the shaft portion 22 so that the machine body 2 and the machine cover 1 are covered and fastened. The positioning mechanism has a limiting component, and the limiting component has a first limiting component 7A arranged on the machine cover 1, and a second limiting component 7B arranged on the machine body 2, and the second limiting component 7B is configured to abut against the first limiting component 7A to limit the movement tendency of the machine cover 1 to the upstream side.

[0050] In this embodiment, a snap-fitting mechanism is arranged on the machine cover 1, and the machine body 2 is correspondingly provided with an axis 22. After closing, the hook portion 8 of the snap-fitting mechanism is rotated to hook the axis 22, so that the machine body 2 and the machine cover 1 are closed and fastened together, and the positioning structure is used to make the machine cover 1 close to the position of the machine body 2 along the positioning direction, thereby achieving precise positioning and closing, ensuring printing quality, and its structure is simple, which is convenient for users to open and close the cover. Furthermore, by means of the first limiting component 7A of the limiting member and the second limiting component 7B arranged in correspondence thereto, wherein the second limiting component 7B is arranged to abut against the first limiting component 7A when the cover is closed, and to limit the movement tendency of one side of the cover 1 and the body 2 toward the upstream side (opposite to the direction of recording medium conveying), based on the movable blade 5B being arranged to be able to cut the recording medium in a contact state with pressure at the downstream side of the fixed blade 5A and closely spaced relative to the fixed blade 5A, the movable blade provides the fixed blade 5A with a movement tendency to move along the upstream side, and the first limiting component 7A is prevented from moving along the upstream side under the abutment restriction of the second limiting component 7B under the driving force generated by the cutting device during the cutting process, thereby ensuring that the fixed blade 5A and the movable blade 5B are overlapped and opposed to each other for accurate cutting, and further ensuring the precise positioning of the print head 3.

[0051] In one embodiment, the hook 8 is hingedly arranged on one lateral side of the cover 1, and the snap-fit ​​mechanism is arranged on the other end of the cover 1 away from the hinged end. The cover 1 is closed to the body 2, triggering the hook 8 to be hooked on the shaft 22 with elastic force. Among them, the snap-fit ​​mechanism uses the reset spring 9 to make the hook 8 elastically arranged on the cover 1, so that the hook 8 can be hinged upward and downward relative to the cover 1, corresponding to the hook 8 being disengaged from or clamped on the shaft 22, corresponding to the reset spring 9 being in a deformed state or an initial state. Correspondingly, the hook 8 is detachably hinged on one lateral side of the cover 1, and the shaft 22 is horizontally arranged on the same side of the body 2. The reset spring 9 can apply an elastic pulling force to the movement of the hook 8, and when no external force is applied to the hook 8, the hook 8 can always remain in the initial position under the action of the reset spring 9. When it is necessary to open the cover, the hook 8 is hinged upward to make the hook 8 disengage from the shaft 22, and then the cover 1 is rotated upward to complete the opening and closing of the cover.

[0052] In particular, the hook portion 8 includes a plate 81 hinged horizontally to one side of the cover 1 and a double hook 82 disposed on the plate 81 and arranged inward. The plate 81 is triggered by the user to rotate upward or downward, driving the double hook 82 to disengage or engage with the shaft 22 along the rotation direction. When the cover 1 is relatively covered with the body 2, the user rotates the plate 81 to correspondingly drive the double hook 82 to rotate to avoid that the cover 1 and the body 2 are completely covered. At this time, the force on the hook portion 8 is canceled, and the hook portion 8 is correspondingly driven by the reset spring 9 to return to the initial state to hook the double hook 82 on the shaft 22, ensuring that the cover 1 is firmly on the body 2 and is closed for printing.

[0053] In other embodiments (not shown), the paper pressing roller is arranged on one side of the machine cover, and the print head is arranged on one side of the machine body. The second positioning component is formed on one side of the machine cover so that the print head can move downstream relative to the machine cover. The first limiting component is formed on the machine body, and the second limiting component is formed on the machine cover, so that when the movable blade contacts the fixed blade by pressure, the machine cover is prevented from moving relative to the machine body. Among them, the structure, function and implementation method of the first positioning component, the second positioning component, the first limiting component and the second limiting component are combined with any of the above embodiments, and will not be described in detail here.

[0054] One embodiment of the present invention provides a printing mechanism (not shown), a machine cover, a machine body, a print head, a paper pressing roller, a cutting device and a positioning mechanism, wherein the print head is swingably arranged on the machine cover under external force, and the paper pressing roller is in pressure contact with the print head and is arranged on the machine body. The cutting device has a fixed blade and a movable blade. The movable blade is movably arranged relative to the fixed blade, and is arranged to be able to be on the upstream side of the fixed blade and closely spaced relative to the fixed blade so as to cut the recording medium in a pressure contact state. Different from the above-mentioned embodiment, the fixed blade of this embodiment is arranged on the downstream side of the conveying direction of the recording medium relative to the print head, and the limiting component of the positioning mechanism has a first limiting component arranged on the machine cover, and a second limiting component arranged on the machine body, and the second limiting component is arranged to be able to abut the first limiting component. Based on the movable blade 5B being arranged to be able to be on the upstream side of the fixed blade 5A and closely spaced relative to the fixed blade 5A, the recording medium is cut in a contact state with pressure, so that the movable blade applies force to the fixed blade 5A toward the downstream side, so that the cover used to support it has a tendency to move along the downstream side, and through the abutment restriction of the second limiting component arranged on the body, the cover supporting the print head is prevented from moving relative to the body under the push of the movable blade, thereby achieving the control of the stability of the contact line between the print head and the paper pressing roller. It is understandable that, unlike this embodiment, in other embodiments, the print head can be arranged on one side of the body, the paper pressing roller can be arranged on one side of the cover, the first limiting component is correspondingly arranged on the body, and the second limiting component is correspondingly arranged on the cover. Other features not mentioned in this embodiment may be the same as any of the above embodiments, and the variant implementation methods and their beneficial effects that can be adopted may also be the same as any of the above embodiments, so they will not be repeated.

[0055] In one embodiment (not shown), the first limiting component includes two protrusions formed on the upper side of the fuselage and protruding laterally, and the second limiting component includes two recessed portions formed on the cover so as to respectively abut against a protrusion. The downstream end of the recessed portion abuts against the protrusion when the cover is fastened to the fuselage to limit the movement tendency of the cover when the movable blade is in pressure contact with the fixed blade. It should be noted that the upstream end of the protrusion and the recessed portion are in clearance fit. Other features not mentioned in this embodiment may be the same as any of the above embodiments, and the deformed implementation methods and their beneficial effects that can be adopted may also be the same as any of the above embodiments, so they will not be repeated.

[0056] An embodiment of the present invention further provides a printer, which includes any of the above-mentioned printer mechanisms.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A printing mechanism, characterized in that: include: Engine cover; body; A print head, used for printing a recording medium, and swingably arranged on one side of the cover and the body under an external force; A paper pressing roller, which is in pressure contact with the print head and is arranged on the other side of the cover and the body; Cutting device, comprising: a fixed blade disposed on a downstream side in a conveying direction of the recording medium relative to the print head; and a movable blade movably disposed relative to the fixed blade, and disposed so as to be closely spaced relative to the fixed blade on the downstream side of the fixed blade so as to cut the recording medium in a contact state with pressure; and Positioning mechanism, having: A positioning member having a first positioning component disposed on the print head and a second positioning component disposed on the other side of the cover and the body, wherein the second positioning component is configured to abut against the first positioning component to limit the movement tendency of the print head toward the downstream side; and The limiting component has a first limiting component arranged on one side of the hood and the fuselage, and a second limiting component arranged on the other side of the hood and the fuselage, wherein the second limiting component is configured to abut against the first limiting component to limit the movement tendency of one side of the hood and the fuselage toward the upstream side.

2. The printing mechanism according to claim 1, characterized in that: One end of the cover in the horizontal direction is hinged to the body, and the other end is fastened to the body in a detachable manner relative to the body; the print head comprises a mounting frame, a thermal component fixed to the mounting frame, and a first elastic component, wherein the first elastic component is arranged between the cover and the mounting frame to generate pressure between the print head and the horizontally placed paper pressing roller when the cover is fastened to the body; Wherein, the transverse direction is perpendicular to the conveying direction.

3. The printing mechanism according to claim 2, characterized in that: The first limiting component includes two protrusions formed on the machine cover and protruding along the lateral direction, and the second limiting component includes two recessed portions formed on the body and capable of respectively abutting against one of the protrusions; the upstream end of the protrusion abuts against the recessed portion when the machine cover is fastened to the body, so as to limit the movement tendency of the machine cover when the movable blade is in pressure contact with the fixed blade; wherein the downstream end of the protrusion is clearance-matched with the recessed portion.

4. The printer mechanism according to claim 3, characterized in that: The body includes two support walls which are arranged at two ends in the horizontal direction and respectively have recessed portions, and the paper pressing roller is rotatably supported on the two support walls by shaft sleeves arranged at both ends thereof; wherein the shaft sleeves are fixed on the support walls; the cover includes two side walls which are arranged at two ends in the horizontal direction and respectively have protrusions, the two side walls are integrally formed, the two support walls are integrally formed, and the protrusions are inserted into the recessed portions when the cover is fastened to the body.

5. The printer mechanism according to claim 3, characterized in that: Each of the recessed portions is provided with guide portions at the end edges of both ends in the conveying direction, and the protruding portion can be inserted into the recessed portion under the guidance of the guide portions.

6. The printer mechanism according to claim 2, characterized in that: The first limiting component includes two protrusions formed on the upper side of the fuselage and protruding laterally, and the second limiting component includes two recessed portions formed on the cover and capable of respectively abutting against one of the protrusions; the downstream end of the recessed portion abuts against the protrusion when the cover is fastened to the fuselage to limit the movement tendency of the cover when the movable blade is in pressure contact with the fixed blade; wherein the upstream end of the protrusion and the recessed portion are clearance-matched.

7. The printer mechanism according to any one of claims 2 to 6, characterized in that: The first positioning component includes two positioning protrusions formed on the mounting frame and protruding along the lateral direction, and the second positioning component includes two positioning recesses formed on the body, respectively used to abut against a positioning protrusion; when the cover is fastened to the body, the downstream end of the positioning protrusion can abut against the positioning recess when the paper pressing roller rotates, so as to limit the movement tendency of the mounting frame toward the downstream side.

8. A printer mechanism according to claim 7, characterized in that: The machine cover includes two side walls arranged at both ends in the horizontal direction, and the two side walls are provided with clearance grooves. The two positioning protrusions are respectively inserted into a clearance groove, and the downstream ends of the positioning protrusions are gap-matched with the clearance grooves so that the movable print head can be supported on the machine body.

9. A printing mechanism, characterized in that: include: Engine cover; body; A print head, used for printing a recording medium, and swingably arranged on one side of the cover and the body under an external force; A paper pressing roller, which is in pressure contact with the print head and is arranged on the other side of the cover and the body; A cutting device comprising: a fixed blade disposed on a downstream side in a conveying direction of the recording medium relative to the print head; and a movable blade movably disposed relative to the fixed blade, and disposed so as to be closely spaced relative to the fixed blade on the upstream side of the fixed blade so as to cut the recording medium in a contact state with pressure; and A positioning mechanism having: A positioning member having a first positioning component disposed on the print head and a second positioning component disposed on the other side of the cover and the body, wherein the second positioning component is configured to abut against the first positioning component to limit the movement tendency of the print head toward the downstream side; and The limiting component has a first limiting component arranged on the machine cover and a second limiting component arranged on the fuselage, wherein the second limiting component is configured to abut against the first limiting component to limit the movement tendency of one of the machine cover and the fuselage toward the downstream side.

10. A printer, characterized in that: It comprises a printing mechanism as described in any one of claims 1 to 9.

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