A moving knife transmission mechanism and a printer

Abstract

The application discloses a movable cutter transmission mechanism and a printer. The movable cutter transmission mechanism is used for driving a movable cutter to rotate relative to a rack along a first rotating direction to forwardly cooperate with a fixed cutter to cut off printing materials. The movable cutter transmission mechanism comprises a movable cutter frame, a transmission member and a supporting member. A second shaft connecting portion of the transmission member is sleeved outside a first shaft connecting portion of the movable cutter frame and is rotationally matched with the first shaft connecting portion to drive the movable cutter frame to rotate. The supporting member is fixedly connected with the rack and is provided with a supporting hole rotationally matched with the second shaft connecting portion. A rear hole wall of the supporting hole is longer than a front hole wall of the supporting hole in a left-right direction relative to a matching dimension of the front hole wall of the supporting hole and the second shaft connecting portion in the left-right direction. The printer comprises the movable cutter transmission mechanism. By using the technical scheme, compared with the prior art, the influence of the reaction force of the fixed cutter on the supporting member on the movable cutter can be effectively dispersed.

Description

Technical Field

[0001] This application relates to the field of printers, specifically to a moving blade transmission mechanism and a printer. Background Technology

[0002] In existing technologies, among thermal printers, dye-sublimation printers, and thermal transfer printers, one type of printer is used to print on roll-shaped printing materials, which need to be cut after printing. The cutting operation is often accomplished by the relative movement of a moving blade relative to a fixed blade. The moving blade is driven by a moving blade drive mechanism, which includes a moving blade drive component and a moving blade transmission mechanism. One type of moving blade achieves cutting through linear motion relative to the fixed blade. In this type, during linear motion, both ends of the moving blade initially contact the fixed blade, balancing and distributing the force in the lateral direction. Another type of moving blade achieves cutting through rotation relative to the fixed blade. When the moving blade rotates, one end of the moving blade in the left-right direction often contacts the fixed blade first. When the end that contacts the fixed blade first makes a cut, it will be subjected to a strong reaction force from the fixed blade. This reaction force will be transmitted to the bushing of the moving blade, which will generate a strong friction between the moving blade holder and the bushing away from the side wall of the fixed blade. This will make the bushing and the moving blade holder more susceptible to damage and will also easily generate scraping, further aggravating the friction between the two. In some cases, the scraping may even fall into other parts of the printer and cause damage. Utility Model Content

[0003] The purpose of this application is to overcome the aforementioned defects or problems in the prior art and to provide a moving blade transmission mechanism and printer that, compared with the prior art, can more effectively disperse the influence of the reaction force of the moving blade on the support member from the stationary blade.

[0004] To achieve the above objectives, the following technical solution is adopted.

[0005] The first technical solution relates to a moving blade transmission mechanism, which drives a moving blade to rotate relative to the frame along a first rotation direction to engage with a fixed blade to cut the printing material; it includes: a moving blade holder on which the moving blade is mounted and has a first shaft connection portion; a transmission component that rotates relative to the frame about a first rotation axis extending in a left-right direction and has a second shaft connection portion, the second shaft connection portion engaging with the first shaft connection portion to drive the moving blade holder to rotate; and a support component that is fixed to the frame and has a support hole that rotatably engages with the second shaft connection portion or the first shaft connection portion, wherein the rear hole wall of the support hole is longer than the front hole wall in the left-right direction in relation to the second shaft connection portion or the first shaft connection portion.

[0006] The second technical solution is based on the first technical solution, wherein the second shaft connecting part is rotatably fitted with the support hole and sleeved outside the first shaft connecting part; the first shaft connecting part may be provided with a first protrusion; the second shaft connecting part is provided with a clearance notch for the first protrusion to protrude radially, and the moving blade extends in the left-right direction to the position of the first protrusion.

[0007] The third technical solution is based on the second technical solution, wherein the support member has a first surface facing the first protrusion along the first rotation direction, the first surface is limited to the first protrusion, the rear hole wall is formed on the rear side of the first surface, and the front hole wall is formed on the front side of the first surface.

[0008] The fourth technical solution is based on the first technical solution, wherein one of the first shaft connecting part and the second shaft connecting part is provided with an anti-rotation protrusion, and the other part is provided with an anti-rotation groove that cooperates with the anti-rotation protrusion to prevent rotation.

[0009] The fifth technical solution is based on the first technical solution, and it further includes a rotating component, which rotates about a second rotation axis parallel to the first rotation axis and is provided with a push-pull protrusion away from the second rotation axis; the transmission component is also provided with a swing part, which is provided with a sliding groove that slides in cooperation with the push-pull protrusion.

[0010] The sixth technical solution is based on the first technical solution, wherein the transmission component is provided with a baffle that abuts against the first shaft connection part in the left-right direction, the baffle is provided with a first through hole, the first through hole is for fasteners to pass through and be screwed to the first shaft connection part.

[0011] The seventh technical solution is based on the first technical solution, wherein the support member is further provided with a frame connection part, the frame connection part is provided with a second through hole, and the frame connection part is connected to the frame by a fastener passing through the second through hole.

[0012] The eighth technical solution relates to a printer, which includes a frame, a moving blade, and a moving blade transmission mechanism as described in any one of the first to seventh technical solutions; the moving blade is mounted on a moving blade holder, and the support member is fixed to the frame; the moving blade holder has a convex shaft at one end away from the first shaft connection in the left-right direction, and the convex shaft is rotatably engaged with the frame.

[0013] The ninth technical solution is based on the eighth technical solution, and it also includes a fixed blade, which is mounted on the frame. When the moving blade rotates in the first rotation direction, the end closest to the first shaft connection part first engages with the fixed blade.

[0014] Compared with existing technologies, the above solution has the following beneficial effects: In the first technical solution, the moving blade rotates forward along the first rotation direction to engage with the fixed blade, thereby subjecting the moving blade to a rearward reaction force from the fixed blade. Based on this, the lateral fit dimension between the rear wall of the support hole and the second or first shaft connection part is longer than that between the front wall of the support hole and the second or first shaft connection part. Therefore, the fit area between the rear wall of the support hole and the second or first shaft connection part is larger than that between the front wall of the support hole and the second or first shaft connection part. This configuration not only increases the contact area between the moving blade and the support member (sleeve) when subjected to the reaction force, reducing the pressure generated by the reaction force, but also more effectively disperses the impact of the reaction force from the fixed blade on the support member compared to existing technologies. Furthermore, it avoids the situation where the lengthened lateral fit dimension between the rear wall of the support hole and the second shaft connection part leads to an excessively large lateral dimension of the entire support member, thus increasing the overall lateral dimension of the printer. This allows the printer to remain lightweight.

[0015] In the second technical solution, the second shaft connecting part is rotatably fitted with the support hole and sleeved outside the first shaft connecting part; the moving blade extends in the left and right direction to the position of the first protrusion, so that the other parts of the first shaft connecting part except for the first protrusion can cooperate with the second shaft connecting part. This not only helps to reduce the size of the moving blade holder in the left and right direction, so as to reduce the overall size of the printer in the left and right direction, and realize the miniaturization and weight reduction of the printer, but also helps to ensure that the first shaft connecting part and the second shaft connecting part are anti-rotationally fitted after the size of the moving blade holder in the left and right direction is reduced.

[0016] In the third technical solution, by setting a first surface facing the first protrusion, the moving tool can return to its initial position by abutting against the first surface after resetting. A rear hole wall is set on the rear side of the first surface, and a front hole wall is set on the front side of the first surface, thereby combining the limiting effect with the effect of reducing the impact on the support component.

[0017] The third technical solution is one of the specific implementation methods of the first protrusion setting.

[0018] The fourth technical solution is one of the specific implementation methods of the anti-rotation combination.

[0019] The fifth technical solution is one of the specific implementation methods for realizing transmission through the moving tool transmission mechanism. Compared with the moving tool holder through gear transmission, the structure is simpler and it is easier to make the moving tool have a larger rotational torque.

[0020] The sixth technical solution involves screwing a fastener through the first through hole to the first shaft connection, thereby limiting the transmission component relative to the moving tool holder along the rotation axis.

[0021] The seventh technical solution is one of the specific implementation methods for connecting the support component to the frame.

[0022] The ninth technical solution illustrates an optional scenario for the use of the first technical solution. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments, the accompanying drawings used are briefly described below: Figure 1 This is a perspective view of the printer in the embodiment; Figure 2 3D breakdown of the printer in the embodiment Figure 1 ; Figure 3 This is a schematic diagram of the internal structure of the printer in the embodiment; Figure 4 for Figure 3 Sectional view along axis AA; Figure 5 This is a perspective view of the connector in the embodiment; Figure 6 3D breakdown of the printer in the embodiment Figure 2 ; Figure 7 This is an exploded perspective view of some components of the moving blade transmission mechanism in the embodiment; Figure 8 for Figure 7 A magnified view of part B.

[0024] Explanation of key figure labels: 1. Printer; 100. Frame; 200. Connector; 300. Heating head; 400. Elastic element; 500. Printing roller; 600. Fixed blade; 700. Moving blade; 800. Moving blade drive mechanism; 900. Printing roller drive mechanism; 101. Side frame; 102. Connecting frame; 103. Front frame; 104. First top abutment; 201. Connecting wall; 202. Side wall; 203. First rib; 204. Second rib; 205. Connecting seat; 206. Second top abutment; 211. First wall; 212. Second wall; 213. Third wall; 221. First side; 222. Second side; 223. Connecting hole; 301. Hot head tail end; 801, moving blade transmission mechanism; 802, moving blade drive motor; 810, moving blade holder; 811, first shaft connection part; 812, convex shaft; 813, anti-rotation groove; 814, first protrusion; 820, transmission component; 821, swinging part; 822, second shaft connection part; 823, sliding groove; 824, baffle wall; 825, first through hole; 826, anti-rotation protrusion; 827, clearance notch; 830, support component; 831, support part; 832, frame connection part; 833, first surface; 834, support hole; 835, rear hole wall; 836, front hole wall; 837, second through hole; 840, rotating component; 841, actuating protrusion; 850, moving blade drive gear; 901, printing roller transmission mechanism; 902, printing roller drive motor. Detailed Implementation

[0025] Unless otherwise specified, the terms “first,” “second,” or “third,” etc., in the claims and description are used to distinguish different objects and not to describe a particular order.

[0026] Unless otherwise specified, the terms “up and down”, “left and right”, and “front and back” in the claims and description are relative concepts, that is, the up and down, left and right and front and back directions are perpendicular to each other, rather than up and down, left and right and front and back based on the observer’s perspective.

[0027] Unless otherwise specified in the claims and description, the terms "fixed connection" or "fixed connection" shall be interpreted broadly to mean any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection, and fixed connection by other means or components.

[0028] Unless otherwise specified, in the claims and description, the terms "comprising," "having," and variations thereof mean "including but not limited to."

[0029] In the claims and description, unless otherwise specified, the term "have" means that a technical feature that follows is part of a technical feature that precedes it.

[0030] Unless otherwise specified in the claims and description, the term "anti-rotation fit" means that there is no relative rotation between the two parts, which can be achieved by a non-rotating body fit or a protrusion and groove fit.

[0031] The technical solutions in the embodiments will now be described clearly and completely with reference to the accompanying drawings.

[0032] Example See Figure 1 , Figure 2 , Figure 3 and Figure 6 , Figure 1 , Figure 2 , Figure 3 and Figure 6 Printer 1 in this embodiment is shown. (As...) Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, printer 1 includes a frame 100, a connector 200, a heating head 300, an elastic element 400, a printing roller 500, a fixed blade 600, a moving blade 700, a moving blade drive mechanism 800, and a printing roller drive mechanism 900.

[0033] See Figure 1 , Figure 3 , Figure 4 and Figure 6 , Figure 1 , Figure 3 , Figure 4 and Figure 6 The structure of the rack 100 in this embodiment is shown. For example... Figure 1 As shown, the rack 100 includes two side frames 101, a connecting frame 102, and a front frame 103. The two side frames 101 are arranged in a left-right direction, and each side frame 101 is perpendicular to the left-right direction. The connecting frame 102 connects the two side frames 101 and extends in the left-right direction. The front frame 103 is fixed relative to the side frames 101. Figure 3 and Figure 4 As shown, the connecting frame 102 has a first top abutment 104 protruding upward in the middle along the left-right direction.

[0034] See Figure 4 and Figure 5 , Figure 4 and Figure 5 The connector 200 in this embodiment is shown. Figure 5 As shown, the connector 200 has a connecting wall 201, two side walls 202, a first rib 203, a second rib 204, a connecting seat 205, and a second abutment 206 that are integrally connected to each other. Figure 5 As shown, the connecting wall 201 extends in the left-right direction. Figure 4As shown, the connecting wall 201 is provided with a first wall 211, a second wall 212, and a third wall 213 arranged along the front-to-back direction. The first wall 211 is in front, the second wall 212 is behind, and the third wall 213 is between the first wall 211 and the second wall 212 and connects the first wall 211 and the second wall 212. The first wall 211, the second wall 212, and the third wall 213 all extend in the left-to-right direction. The first wall 211 and the second wall 212 are both inclined relative to the vertical direction. The third wall 213 is perpendicular to the vertical direction. The cross-section of the first wall 211 and the second wall 212 in the vertical direction (e.g., ...) is shown in the figure. Figure 4 An upward angle is formed on the cross-section shown, thus creating an arch structure for the connecting wall 201. For example... Figure 5 As shown, two side walls 202 are provided corresponding to two side frames 102. Each side wall 202 is perpendicular to the left-right direction. Each side wall 202 has a first side portion 221 that connects to the first wall 211 and a second side portion 222 that connects to the second wall 212. The first side portion 221 and the second side wall 222 are connected to each other. The first side portion 221 and the second side wall 222 are respectively provided with connecting holes 223. The first side portion 221 and the second side wall 222 are respectively screwed to the side frame through fasteners and connecting holes 223 (see reference). Figure 2 ).like Figure 5 As shown, the first rib 203 extends in the left-right direction and connects with the side wall 202. The first rib 203 extends downward in the vertical direction from the connecting wall 201 toward the lower surface of the hot head 300. Preferably, there are at least two first ribs 203; in this embodiment, there are three first ribs 203, spaced apart in the front-back direction. The second rib 204 extends in the front-back direction. The second rib 204 extends downward in the vertical direction from the connecting wall 201 toward the lower surface of the hot head 300. Preferably, there are at least two second ribs 204; in this embodiment, there are three second ribs 204, spaced apart in the left-right direction. In this embodiment, each first rib 203 and each second rib 204 forms a grid structure. The connecting seat 205 is annular, extending downward in the vertical direction from the connecting wall 201 toward the lower surface of the hot head 300, and is used to accommodate the upper end of the elastic member 400. In this embodiment, at least one first rib 203 and at least one second rib 204 intersect the annular wall of the connecting seat 205 and extend into the connecting seat, so that the elastic member 400 abuts against the lower surfaces of the first rib 203 and the second rib 204. Preferably, there are at least two connecting seats 205; in this embodiment, there are three connecting seats 205. The second abutting portion 206 extends downward from the middle of the connecting wall 201 in the left-right direction and is opposite to the first abutting portion 104.

[0035] See Figure 3 and Figure 4 , Figure 3 and Figure 4 The heat head 300 in this embodiment is shown. For example... Figure 3 and Figure 4 As shown, the heating head 300 extends in the left-right direction and is used to heat the printing material for printing. The heating head 300 has a heating head tail end 301 at the middle part in the left-right direction and at the rear part in the front-back direction. The heating head tail end 301 is sandwiched between the first top abutment part 104 and the second top abutment part 206 so that the heating head 300 can swing in a plane perpendicular to the left-right direction.

[0036] See Figure 3 , Figure 4 and Figure 5 , Figure 3 , Figure 4 and Figure 5 The elastic element 400 in this embodiment is shown. For example... Figure 3 , Figure 4 and Figure 5 As shown, there are at least two elastic elements 400, and in this embodiment, there are three, each corresponding to a connecting seat 205. The upper end (first end) of the elastic element 400 is accommodated within the connecting seat 205 and abuts against the first rib 204 and the second rib 205. The lower end (second end) of the elastic element 400 abuts against the upper surface of the heating head 300, so that the heating head 300 abuts against the printing roller 500 in the vertical direction. In this embodiment, the elastic element 400 is a spring.

[0037] See Figure 3 and Figure 4 , Figure 3 and Figure 4 The printing roller 500 in this embodiment is shown. For example... Figure 3 and Figure 4 As shown, the printing roller 500 cooperates with the heating head 300 and drives the printing material to move along the paper output direction by rotation. The printing roller 500 is supported by two side frames 101 of the frame 100.

[0038] See Figure 6 , Figure 6 The fixed blade 600 in this embodiment is shown. For example... Figure 6 As shown, the front frame 103 is installed on the frame 100.

[0039] See Figure 6 , Figure 6 The moving blade 700 in this embodiment is shown. For example... Figure 6As shown, the moving blade 700 rotates relative to the frame 100 about a first rotation axis in a first rotation direction until it engages with the fixed blade 600 to cut the printing material. It then rotates about the first rotation axis in a second rotation direction opposite to the first rotation direction until it disengages from the fixed blade 600 and returns to its initial position. In this embodiment, the moving blade 700 is configured such that when it rotates in the first rotation direction, the end located on the left side of the moving blade 700 first engages with the fixed blade 600.

[0040] See Figure 1 and Figure 2 , Figure 1 and Figure 2 The moving blade drive mechanism 800 in this embodiment is shown. Figure 1 and Figure 2 As shown, the moving tool drive mechanism 800 includes a moving tool transmission mechanism 801 and a moving tool drive motor 802.

[0041] See Figure 6 , Figure 6 The moving blade transmission mechanism 801 in this embodiment is shown. For example... Figure 6 As shown, the moving tool transmission mechanism 801 includes a moving tool holder 810, a transmission component 820, a support component 830, a rotating component 840, and a moving tool drive gear 850.

[0042] See Figure 6 , Figure 7 and Figure 8 , Figure 6 , Figure 7 and Figure 8 The movable tool holder 810 in this embodiment is shown. Figure 6 As shown, the movable tool holder 810 houses the movable tool 700; specifically, the movable tool 700 is fixed to the lower surface of the movable tool holder 810. Figure 7 As shown, the moving tool holder 810 has a first shaft connecting part 811 at its left end and a convex shaft 812 at its right end that extends away from the first shaft connecting part 811 in a left-right direction. The convex shaft 812 is supported by a side frame 101 located on the right side of the frame 100 and is rotatably engaged with the side frame 101. (See also...) Figure 8 The first shaft connecting part 811 has anti-rotation grooves 813 on both the upper and lower sides, and a first protrusion 814 on the front side. The moving cutter 700 extends in the left-right direction to the position of the first protrusion.

[0043] See Figure 7 and Figure 8 , Figure 7 and Figure 8 The transmission component 820 in this embodiment is shown. For example... Figure 8As shown, the transmission component 820 rotates relative to the frame 100 about a first rotation axis extending in the left-right direction and is used to drive the movable tool holder 810 to rotate. The transmission component 820 is provided with a swing portion 821 and a second shaft connecting portion 822 arranged in the left-right direction. The swing portion 821 extends radially perpendicular to the first rotation axis and is provided with a radially extending groove 823. A baffle 824 is provided on the swing portion 821 corresponding to the position of the first shaft connecting portion 811. The baffle 824 abuts against the first shaft connecting portion 811 and is provided with a first through hole 825. The first through hole 825 allows a fastener to pass through and be screwed to the first shaft connecting portion 811. The second shaft connecting portion 822 is provided with an annular wall. The second shaft connecting portion 822 is sleeved outside the first shaft connecting portion 811 and engages with the first shaft connecting portion 811 to prevent rotation and drive the movable tool holder 810 to rotate. In other embodiments, the first shaft connecting portion 811 may also be sleeved outside the second shaft connecting portion 822. Specifically, in this embodiment, the second shaft connecting portion 822 has two anti-rotation protrusions 826 corresponding to the anti-rotation groove 813 of the first shaft connecting portion 811. The anti-rotation protrusions 826 are inserted into the anti-rotation groove 813. Of course, the anti-rotation protrusions 826 can also be provided in the first shaft connecting portion 811, and the anti-rotation groove 813 can also be provided in the second shaft connecting portion 822. The anti-rotation engagement between the second shaft connecting portion 822 and the first shaft connecting portion 811 can also adopt other methods, such as non-rotating surface engagement, so that the moving tool holder 810 rotates with the transmission member 820. In this embodiment, the annular wall of the second shaft connecting portion 823 is also provided with a clearance notch 827, which allows the first protrusion 814 of the first shaft connecting portion 811 to protrude radially. In other embodiments, the first protrusion 814 can also be provided in the second shaft connecting portion 823.

[0044] See Figure 8 , Figure 8 The support member 830 in this embodiment is shown. Figure 8As shown, the support member 830 has a support portion 831 and a frame connecting portion 832 that are integrally connected. The support portion 831 has a first surface 833 and a support hole 834. The first surface 833 faces the first protrusion 814 in a first rotation direction, and the first surface 833 is adapted to limit the first protrusion 814 so that when the moving tool holder 810 is reset to the initial position, the first protrusion 814 abuts against the first surface 833. The support hole 834 is rotatably engaged with the second shaft connecting portion 822. In this embodiment, the fit dimension between the rear hole wall 835 of the support hole 834 and the second shaft connecting portion 822 in the left-right direction is longer than the fit dimension between the front hole wall 836 and the second shaft connecting portion 822 in the left-right direction. In other embodiments, when the first shaft connecting portion 811 is sleeved outside the second shaft connecting portion 822, the mating dimension between the rear hole wall 835 of the support hole 834 and the first shaft connecting portion 811 in the left-right direction is longer than the mating dimension between the front hole wall 836 and the first shaft connecting portion 811 in the left-right direction. Specifically, the rear hole wall 835 of the support hole 834 is formed behind the first surface 833, and the front hole wall 836 of the support hole 834 is formed in front of the first surface 833. The frame connecting portion 832 is provided with a second through hole 837 so that the frame connecting portion 832 is connected to the side frame 101 on the left side of the frame 100 by a fastener passing through the second through hole 837.

[0045] See Figure 6 , Figure 6 The rotating member 840 and the moving blade drive gear 850 in this embodiment are shown. Figure 6 As shown, the rotating member 840 rotates about a second rotation axis parallel to the first rotation axis, and is provided with teeth that mesh with the moving tool drive gear 850, and a lever protrusion 841 that protrudes to the left and away from the second rotation axis in the left-right direction. The lever protrusion 841 is inserted into the slide groove 823 of the transmission member 820 and slides in cooperation with the slide groove 823, so that the rotation of the rotating member 840 drives the transmission member 820 to rotate. The moving tool drive gear 850 is driven by the moving tool drive motor 802 to rotate about a third rotation axis parallel to the second rotation axis, and drives the rotating member 840 to rotate by meshing with the teeth of the rotating member 840.

[0046] See Figure 1 and Figure 2 , Figure 1 and Figure 2 The moving blade drive motor 802 in this embodiment is shown, as follows: Figure 1 and Figure 2 As shown, the moving blade drive motor 802 is mounted on the left side frame 101 and located behind the printing roller 500. The moving blade drive motor 802 drives the entire moving blade transmission mechanism 801 to rotate the moving blade 700. In this embodiment, the entire moving blade drive mechanism 800 is mounted on the left side frame 101.

[0047] See Figure 2, Figure 2 The printing roller drive mechanism 900 in this embodiment is shown. For example... Figure 2 As shown, the printing roller drive mechanism 900 is mounted on the right side frame 101 and includes a printing roller transmission mechanism 901 and a printing roller drive motor 902. The printing roller transmission mechanism 901 consists of a series of gears and is driven by the printing roller drive motor 902 to rotate the printing roller 500 and is located on the rear side of the printing roller 500.

[0048] In this embodiment, the first wall 211 and the second wall 212 of the connecting wall 201 of the connector 200 are arranged in the front-back direction and are both inclined in the vertical direction relative to the hot head 300 and the printing roller 500, and form an upward angle between them in the cross section perpendicular to the left-right direction. This makes the connector 200 form an upward arch bridge structure in the front-back direction. Based on this, the first side 221 connected to the first wall 211 and the second side 222 connected to the second wall 212 on the side wall 202 of the connector 200 are respectively fixed to the side frame 101, and the first side 221 and the second side 222 are connected to each other. This makes the upper ends of the first wall 211 and the second wall 212 subjected to stress that may cause them to bend upward when the connecting wall 201 is subjected to an upward reaction force. This stress will drive the first side 221 and the second side 222 respectively. The part where the first side 221 and the second side 222 are connected to each other is converted into stresses that are opposite to each other in the left and right direction. Since the stresses that are opposite to each other can only compress the part where the first side 221 and the second side 222 are connected to each other and cannot be released through other deformations, and since the side wall 202, as a solid, has a strong resistance to compression, the entire connector 200 is less likely to deform when subjected to an upward reaction force. Especially in the context of printer miniaturization and weight reduction, even if the thickness of the side frame 101 needs to be reduced, the aforementioned connector 200 is not easily deformed and does not easily cause the upper parts of the two side frames 101 to move closer to each other in the left and right directions, resulting in higher structural rigidity of the overall frame 100. Compared with existing technologies, it can provide more balanced resistance to each elastic component, thus making it less likely for the printed media to exhibit uneven density in the left and right directions after printing.

[0049] In this embodiment, the first side 221 and the second side 222 are respectively screwed to the side frame 101 by fasteners and connecting holes 223. Compared with other fastening methods such as snap-fit, it is easier to ensure the positional accuracy and connection strength of the connector 200 relative to the frame 100, easier to ensure that the connector 200 does not deviate in the left and right direction along the up and down direction, and easier to ensure the structural rigidity of the connector 200 after it is connected to the frame 100.

[0050] In this embodiment, the first rib 203 extends in the left-right direction and connects with the two side walls 202. If the connector 200 is subjected to upward stress in the left-right direction, the first rib 203 will be subjected to compressive stress in the left-right direction by the connecting wall 201 and the two side walls 202. As a solid, the first rib 203 has strong resistance to compression, thus making the connector 200 less prone to upward bending deformation.

[0051] In this embodiment, the second rib 204 extends in the front-back direction. If the connector 200 bends and deforms in the front-back direction along the up-down direction, the second rib 204 will be stretched or compressed. The second rib 204 has a strong ability to resist stretching or compression, thus making the connector 200 less prone to bending and deformation in the front-back direction.

[0052] In this embodiment, the first rib 203 and the second rib 204 are connected to each other to form a grid structure, which makes the connector 200 more resistant to deformation.

[0053] In this embodiment, the first rib 203 and the second rib 204 intersect with the connecting seat 205 and extend into the connecting seat 205, so that the reaction force of the elastic element 400 acts directly on the first rib 203 and the second rib 204, thereby better improving the bending deformation resistance of the connecting element 200.

[0054] In this embodiment, the moving blade drive mechanism 800 and the printing roller drive mechanism 900 are respectively mounted on the corresponding side frames. Since the printing roller 500 and the moving blade 700 do not work simultaneously under normal circumstances, when the printing roller 500 is driven to move or the moving blade 700 is driven to move, only one side frame 101 is subjected to force, which can easily cause the entire connecting frame 200 to deform. However, the bending deformation resistance of the connecting frame 200 in this embodiment can also strengthen the rigidity of the frame 100 connected to it to resist bending deformation and torsion. Therefore, the printer 1 in this application can also resist bending and deformation caused by the force on only one side frame 101.

[0055] In this embodiment, since both the moving blade drive motor 802 and the printing roller drive motor 902 are located behind the printing roller 500 in the front-to-back direction, the rear part of the side frame 101 is subjected to downward gravity, and the printing roller 500 is subjected to downward force from the heating head 300, making it easy for the side frame 101 to bend downwards at both ends in the left-to-right direction. In this embodiment, the first side portion 221 and the second side portion 22 of the connector 200 are connected to each other and to the side frame 101, which can convert the downward stress at both ends of the side frame 101 in the left-to-right direction into inward compressive stress at the connection between the first side portion 221 and the second side portion 222, thereby resisting the bending deformation of the side frame 101 and improving the rigidity of the frame 100.

[0056] In this embodiment, the movable blade 700 rotates forward along the first rotation direction to engage with the fixed blade 600, thereby causing the movable blade 700 to be subjected to the rearward reaction force of the fixed blade 600. Based on this, the left-right fit dimension between the rear hole wall 835 of the support hole 834 and the second shaft connection portion 822 is longer than that between the front hole wall 836 and the second shaft connection portion 822. Therefore, the fit area between the rear hole wall 835 of the support hole 834 and the second shaft connection portion 822 is larger than that between the front hole wall 836 and the second shaft connection portion 822. This configuration not only increases the contact area between the moving blade 700 and the support member 830 (shoulder sleeve) when subjected to reaction force, reducing the pressure generated by the reaction force, but also more effectively disperses the impact of the reaction force from the fixed blade 600 on the support member 830 compared to existing technologies. Furthermore, it avoids the entire support member 830 becoming excessively large in the left-right direction due to the increased fit dimension between the rear hole wall 835 and the second shaft connection portion 822, thus increasing the overall size of the printer 1 in the left-right direction. This allows the printer 1 to remain lightweight.

[0057] In this embodiment, the movable blade 700 extends in the left-right direction to the location of the first protrusion 814, so that the other parts of the first shaft connecting part 811, except for the first protrusion 814, can cooperate with the second shaft connecting part 822. This not only helps to reduce the size of the movable blade holder 810 in the left-right direction, so as to reduce the overall size of the printer 1 in the left-right direction, thereby achieving miniaturization and weight reduction of the printer 1, but also helps to ensure that the first shaft connecting part 811 and the second shaft connecting part 822 can still be anti-rotated after the size of the movable blade holder 810 in the left-right direction is reduced.

[0058] In this embodiment, by providing a first surface 833 facing the first protrusion 814, the moving tool 700 can return to its initial position by abutting the first surface 833 through the first protrusion 814 after resetting. A rear hole wall 835 is provided on the rear side of the first surface 833, and a front hole wall 836 is provided on the front side of the first surface 833, thereby combining the limiting effect with the effect of reducing the impact on the support member 830.

[0059] In this embodiment, the sliding engagement between the actuating protrusion 841 and the sliding groove 823 is simpler in structure than the gear transmission of the moving tool holder 810, and makes it easier for the moving tool 700 to have a larger rotational torque.

[0060] The description of the above specification and embodiments is used to explain the scope of protection of this application, but does not constitute a limitation on the scope of protection of this application.

Claims

1. A moving blade transmission mechanism, used to drive a moving blade to rotate relative to the frame in a first rotation direction until it moves forward to engage with a fixed blade to cut the printing material; characterized in that, It includes: A movable tool holder, on which a movable tool is mounted and a first shaft connecting part is provided; A transmission component, which rotates relative to the frame about a first rotation axis extending in a left-right direction, and is provided with a second shaft connection portion, the second shaft connection portion engaging with the first shaft connection portion to prevent rotation, thereby driving the moving tool holder to rotate; and The support member is fixed to the frame and has a support hole that rotatably engages with the second shaft connection part or the first shaft connection part. The rear hole wall of the support hole is longer in the left-right direction than the front hole wall in the left-right direction.

2. The moving tool transmission mechanism as described in claim 1, characterized in that, The second shaft connection part is rotatably fitted with the support hole and sleeved outside the first shaft connection part; the first shaft connection part is provided with a first protrusion; the second shaft connection part is provided with a clearance notch for the first protrusion to protrude radially, and the moving blade extends in the left-right direction to the position of the first protrusion.

3. The moving tool transmission mechanism as described in claim 2, characterized in that, The support member has a first surface facing the first protrusion along the first rotation direction. The first surface is in a limiting fit with the first protrusion. The rear hole wall is formed on the rear side of the first surface, and the front hole wall is formed on the front side of the first surface.

4. The moving tool transmission mechanism as described in claim 1, characterized in that, One of the first shaft connecting part and the second shaft connecting part is provided with an anti-rotation protrusion, and the other part is provided with an anti-rotation groove that cooperates with the anti-rotation protrusion to prevent rotation.

5. The moving tool transmission mechanism as described in claim 1, characterized in that, It also includes a rotating component, which rotates about a second rotation axis parallel to the first rotation axis and is provided with a tug protrusion away from the second rotation axis; the transmission component is also provided with a swinging part, which is provided with a sliding groove that slides in cooperation with the tug protrusion.

6. The moving tool transmission mechanism as described in claim 1, characterized in that, The transmission component is provided with a baffle that abuts against the first shaft connection part in the left-right direction. The baffle is provided with a first through hole for fasteners to pass through and be screwed to the first shaft connection part.

7. The moving tool transmission mechanism as described in claim 1, characterized in that, The support member is also provided with a frame connection part, which has a second through hole. The frame connection part is connected to the frame by a fastener passing through the second through hole.

8. A printer, characterized in that, It includes a frame, a moving blade, and a moving blade transmission mechanism as described in any one of claims 1 to 7; the moving blade is mounted on a moving blade holder, and the support member is fixed to the frame; the moving blade holder has a convex shaft at one end away from the first shaft connection in the left-right direction, and the convex shaft is rotatably engaged with the frame.

9. The printer as claimed in claim 8, characterized in that, It also includes a fixed blade, which is mounted on the frame. When the moving blade rotates in the first rotation direction, the end closest to the first shaft connection part first engages with the fixed blade.

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