Cutter mechanism for realizing semi-cutting and full-cutting and printer comprising same

Abstract

The invention discloses a cutter mechanism for realizing semi-cutting and full-cutting and a printer comprising the cutter mechanism. The cutter mechanism comprises a supporting frame, an upper cutter rest assembly, a cutting board assembly, a driving motor and a gear transmission assembly. The upper cutter rest assembly comprises a sliding rail assembly, a cutter support and an upper cutter. A main shaft of the chopping board assembly is provided with two planes which are adjacent to each other and form a 90-degree angle, and the flexible cutter strip and the lower cutter are fixed on the two planes respectively; the gear transmission assembly drives the upper knife rest assembly and the cutting board assembly to move relatively under the action of the driving motor, and semi-cutting or full-cutting action is achieved. And the full-half cutting conversion assembly can achieve rotation of a main shaft in the cutting board assembly, and conversion between the flexible cutter strip and the lower cutter is completed. Through coaxial arrangement of the flexible cutter strip and the lower cutter and cam surface arrangement of the large cam gear and the small cam gear, under the driving of positive and negative rotation of the driving motor, the full-cutting and half-cutting functions can be achieved, automatic switching of the full-cutting and half-cutting functions can also be achieved, the automation degree is high, and different cutting requirements of customers are met.

Description

Technical Field

[0001] The invention relates to the field of printers, in particular to a cutter mechanism for realizing half cutting and full cutting and a printer comprising the same. Background Art

[0002] At present, printers all include a cutter mechanism for cutting printed linear or strip-shaped flexible media. Most of the existing cutter mechanisms can only achieve a single half cut or a single full cut of the media. In order to achieve both full and half cut functions, a few printers will install two modules in the printer, one for half cut and the other for full cut. This structure will cause inaccurate segment lengths of the cut media due to the different positions of the full cut and half cut, affecting product quality. Although some printers integrate the full cut mechanism and the half cut mechanism into the same cutter mechanism, the conversion between the full cut and half cut functions requires manual operation, which leads to inconvenient operation and poor customer experience. In addition, the existing cutting methods also have limitations, which affect the application scope of the printer.

[0003] It can be seen that the existing printer cutter mechanism still has inconveniences and defects, and is in urgent need of further improvement. How to create a new cutter mechanism for realizing half-cutting and full-cutting and a printer including the same, so that it can realize half-cutting and full-cutting functions in the same module through structural improvement, and can also realize automatic conversion between half-cutting and full-cutting functions, with high cutting efficiency, can meet customers' needs for different cutting forms, and has a wide range of applications, has become a goal that the current industry urgently needs to improve. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a cutter mechanism for realizing half cutting and full cutting, so that through structural improvement, the half cutting and full cutting functions can be realized in the same module, and the automatic conversion between the half cutting and full cutting functions can be realized. The cutting efficiency is high, the requirements of customers for different cutting forms can be met, and the scope of use is wide, thereby overcoming the shortcomings of the existing cutter mechanism.

[0005] In order to solve the above technical problems, the present invention provides a cutting mechanism for realizing half cutting and full cutting, comprising a support frame and an upper knife holder assembly, an anvil assembly, a driving motor and a gear transmission assembly arranged on the support frame.

[0006] The support frame comprises a front side wall, a rear side wall, a left side wall and a right side wall;

[0007] The upper knife frame assembly includes a slide rail assembly, a cutter bracket and an upper cutter, the slide rail assembly includes two guide rails and sliders arranged in the guide rails, the two guide rails are symmetrically arranged on both sides of the inner wall of the rear side wall, the cutter bracket adopts a square frame, the upper part of the square frame is provided with the upper cutter with the blade facing downward, the lower middle position of the square frame is provided with a roller, the roller shaft of the roller is perpendicular to the blade surface of the upper cutter, the two sides of the square frame are respectively fixedly connected with the sliders in the two guide rails, so as to realize the up and down movement of the square frame along the guide rails;

[0008] The cutting board assembly comprises a main shaft, the two ends of which are rotatably arranged on the left side wall and the right side wall respectively, and the middle part of the main shaft is provided with two adjacent planes at 90 degrees, a flexible knife strip is fixed on one plane for realizing a half-cutting function relative to the upper cutter, and a lower cutter is fixed on the other plane for realizing a full-cutting function in contact with the upper cutter;

[0009] The driving motor is arranged outside the rear side wall, and the motor shaft end thereof extends into the interior of the supporting frame;

[0010] The gear transmission assembly includes a reduction gear and a large cam gear. The reduction gear is respectively meshed with the shaft end gear of the drive motor and the large cam gear. A cam is provided on one side of the large cam gear. The outer side surface of the cam is in contact with the roller at the lower part of the cutter bracket. When the large cam gear rotates under the forward and reverse rotation of the drive motor, it can act on the roller to drive the cutter bracket to slide up and down, and then drive the upper cutter to move up and down, thereby realizing the relative movement of the upper cutter and the flexible knife strip or the lower cutter in the anvil assembly, and completing the half-cutting or full-cutting action.

[0011] As a further improvement, an arc-shaped skirt is provided on the other side of the large cam gear, a first gap is provided on the arc-shaped skirt, and the cutter mechanism also includes a position sensor for detecting the first gap to obtain the 0-point position of the large cam gear.

[0012] As a further improvement, a second gap is also provided on the arc-shaped skirt for cooperating with the position sensor to obtain a pre-half-cut position or a pre-full-cut position of the large cam gear.

[0013] As a further improvement, the widths of the first gap and the second gap are different.

[0014] As a further improvement, the upper knife holder assembly also includes a return spring, one end of which is connected to the bottom of the cutter holder, and the other end is connected to the support frame, so as to realize automatic return of the cutter holder after cutting is completed.

[0015] As a further improvement, the lower cutter adopts a V-shaped structure.

[0016] A further improvement includes a full-half-cut conversion assembly, which includes a transmission gear set, a small cam gear and a conversion mechanism, wherein the transmission gear set is meshed with the large cam gear and the small cam gear respectively, and a semi-enclosed cam is provided on one side of the small cam gear, wherein the semi-enclosed cam has an inner arc surface and an outer arc surface, wherein the inner arc surface has a constant diameter arc surface, and the outer arc surface is a variable diameter arc surface; the conversion mechanism includes a conversion plate and a reversing spring, wherein one end of the conversion plate is rotatably connected to the front side wall, and the other end is connected to the main shaft of the anvil assembly through the reversing spring, and the rotation A rotating wheel is provided in the middle of the changing plate, and the rotating wheel is in fit with the inner and outer arc surfaces of the semi-enclosed cam of the small cam gear. The small cam gear rotates under the drive of the large cam gear. When the rotating wheel and the inner arc surface of the semi-enclosed cam form a sliding surface, the conversion plate does not move. When the rotating wheel and the outer arc surface of the semi-enclosed cam form a sliding surface, the conversion plate rotates downward under the drive of the semi-enclosed cam, and then drives the reversing spring to pull the main shaft to rotate until the main shaft rotates 90 degrees, completing the conversion of the flexible knife strip and the lower cutting knife in the anvil assembly.

[0017] As a further improvement, the outer arc surface of the semi-closed cam also includes a constant diameter arc surface connected to the variable diameter arc surface, which is used to ensure that the main shaft remains stationary after rotating 90 degrees.

[0018] As a further improvement, a limit block is fixed at one end of the main shaft, and one end of the limit block is connected to the reversing spring for realizing the rotation of the main shaft under the tension of the reversing spring. A retaining spring is provided at the other end of the main shaft for realizing automatic return of the main shaft when there is no tension.

[0019] As another improvement of the present invention, the present invention also provides a printer, wherein the printer comprises the above-mentioned cutter mechanism for realizing half cutting and full cutting.

[0020] After adopting such a design, the present invention has at least the following advantages:

[0021] 1. The cutter mechanism of the present invention can realize the coaxial setting of the flexible knife strip and the lower cutter by setting the anvil spindle with two planes, and then realize the up and down sliding of the upper cutter by driving the large cam gear, so that it corresponds to the flexible knife strip or the lower cutter respectively, completing the full cutting and half cutting functions in one module, and the cutting position is fixed, which does not affect the length of the media segmentation section, improves the cutting efficiency, and enhances the cutting quality. It can also be used for cutting needs of different media, and has a wide range of applications.

[0022] 2. Through the setting of the position sensor and the first gap and the second gap, the position of the large cam gear can be accurately detected to meet the control of precise cutting; it can also meet the pre-half-cutting and pre-full-cutting functions, greatly saving cutting time and improving efficiency.

[0023] 3. The full-cut and half-cut conversion component setting can also realize automatic conversion between full-cut and half-cut functions without manual operation. It has a high degree of automation and can meet customers' needs for various cutting forms, greatly improving user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Figure 1 It is a schematic diagram of the structure of the cutter mechanism of the present invention in an initial position.

[0026] Figure 2 It is a three-dimensional structural schematic diagram of the cutter mechanism of the present invention in an initial position.

[0027] Figure 3 It is a structural schematic diagram of the slide rail assembly in the cutter mechanism of the present invention.

[0028] Figure 4 It is a structural schematic diagram of a cutter support in the cutter mechanism of the present invention.

[0029] Figure 5 It is a three-dimensional structural schematic diagram of the cutter support in the cutter mechanism of the present invention.

[0030] Figure 6 It is a structural schematic diagram of the cutting board assembly in the cutting mechanism of the present invention.

[0031] Figure 7 and Figure 8 It is a structural schematic diagram of the large cam gear in the cutter mechanism of the present invention.

[0032] Fig. 9 It is a structural schematic diagram of the small cam gear in the cutter mechanism of the present invention.

[0033] Fig.10 It is a structural schematic diagram of a conversion plate in the cutter mechanism of the present invention.

[0034] Fig.11 It is a schematic front view of the structure of the cutter mechanism of the present invention in a half-cutting completion position.

[0035] Fig.12 It is a three-dimensional structural schematic diagram of the cutter mechanism of the present invention in a half-cutting completion position.

[0036] Fig.13It is a schematic diagram of the front view of the structure of the cutter mechanism of the present invention in the pre-half-cutting position.

[0037] Fig.14 It is a three-dimensional structural schematic diagram of the cutter mechanism of the present invention in a pre-half-cutting position.

[0038] Fig.15 It is a schematic front view of the structure of the cutter mechanism of the present invention in a fully cut position.

[0039] Fig.16 It is a three-dimensional structural schematic diagram of the cutter mechanism of the present invention in a fully cut completion position.

[0040] Fig.17 It is a side view of the cutter mechanism of the present invention (used to illustrate the entry of the printing medium into the cutter mechanism). DETAILED DESCRIPTION

[0041] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0042] The cutter mechanism of the present application is used to realize the half-cutting and full-cutting functions of the printing medium. The printing medium is but not limited to heat shrink tubes, sleeves, stickers, signboards, etc. The half-cutting function means that for heat shrink tubes and sleeves, the printing medium is cut along the cross section to a certain thickness, leaving a thickness connection of 0.05-0.07mm, which can be torn apart manually while ensuring that the cut surface is flat and burr-free; for sticker-type printing media, the face paper is completely cut and the bottom paper is not cut, which is convenient for customers to separate the bottom paper from the face paper for use. The full-cutting function is to cut the heat shrink tube and sleeve directly along the cross section to completely separate the front and back of the printing medium.

[0043] Refer to the attached Figure 1 and 2 As shown, the cutting mechanism of this embodiment includes a supporting frame 1 and an upper knife holder assembly 2, a cutting board assembly 3, a driving motor 4 and a gear transmission assembly 5 arranged on the supporting frame 1.

[0044] The support frame 1 described in this embodiment includes a front side wall 11, a rear side wall 12, a left side wall 13, a right side wall 14 and a bottom plate, which belongs to the main frame of the cutter mechanism and provides a mounting surface for other components.

[0045] The upper knife holder assembly 2 includes a slide rail assembly 21, a knife support 22 and an upper knife 23. Figure 1 and 3As shown, the slide rail assembly 21 includes two guide rails 211 and sliders 212 disposed in the guide rails 211. The two guide rails 211 are symmetrically disposed on both sides of the inner wall of the rear side wall 12. Figure 4 and 5 As shown, the cutter support 22 is a square frame, the upper portion of the square frame is provided with the upper cutter 23 with the blade facing downward, and the lower middle portion of the square frame is provided with a roller 221, and the roller shaft 222 of the roller 221 is perpendicular to the blade surface of the upper cutter 23. The two sides of the square frame are respectively fixedly connected to the sliders 212 in the two guide rails 211, so that the square frame can move up and down along the guide rails 211.

[0046] Please refer to the attached Figure 6 As shown, the anvil assembly 3 includes a main shaft 31, and the two ends of the main shaft 31 are rotatably arranged on the left side wall 13 and the right side wall 14 through shaft sleeves 32, and the middle part of the main shaft 31 is provided with two adjacent planes at 90 degrees, a flexible blade strip 33 is fixed on one plane, which is used to realize the half-cutting function relative to the upper cutter 23, and a lower cutter 34 is fixed on the other plane, which is used to realize the full-cutting function in contact with the upper cutter 23. Among them, the lower cutter 34 adopts a V-shaped structure, which can better keep the cutting position of the medium fixed.

[0047] In this embodiment, the driving motor 4 is arranged on the outer side of the rear side wall 12 , and the motor shaft end thereof extends into the interior of the supporting frame 1 .

[0048] Refer to the attached Figure 1 and 2 As shown, the gear transmission assembly 5 includes a reduction gear 51 and a large cam gear 52, and the reduction gear 51 is meshed with the shaft end gear 41 of the drive motor 4 and the large cam gear 52 respectively. In this embodiment, the reduction gear 51 adopts a double-layer gear, whose gear shaft is fixed on the rear side wall 12, and its lower large gear end is meshed with the shaft end gear 41 of the drive motor 4, and its upper small gear end is meshed with the large cam gear 52. The large cam gear 52 is fixed to the front side wall 11 and the rear side wall 12 through a large cam shaft, and a cam 521 is provided on one side of the large cam gear 52, as shown in the attached Figure 7 As shown, the outer side surface of the cam 521 contacts the roller 221 at the bottom of the cutter bracket 22 to form a sliding surface. When the large cam gear 52 rotates under the forward and reverse rotation of the driving motor 4, it can act on the roller 221 to drive the cutter bracket 22 to slide up and down, and then drive the upper cutter 23 to move up and down, so as to achieve the relative movement of the upper cutter 23 and the flexible blade 33 or the lower cutter 34 in the anvil assembly 3, and complete the half-cutting or full-cutting action.

[0049] Better, such as Figure 8 As shown, the other side of the large cam gear 52 is provided with an arcuate skirt 522, and a first gap 523, such as a 1 mm gap, is provided on the arcuate skirt 522. The cutter mechanism also includes a position sensor, which is arranged on the rear side wall 12, for detecting the first gap 523 to obtain the 0-point position of the large cam gear 52.

[0050] More preferably, the arc-shaped skirt 522 is further provided with a second gap 524 , such as a 2 mm gap, for cooperating with the position sensor to obtain the pre-half-cut position or pre-full-cut position of the large cam gear 52 .

[0051] Also, as attached Figure 1 and 2 As shown, the upper tool holder assembly 2 also includes two return springs 24 located on the left and right sides respectively, one end of the return spring 24 is connected to the bottom of the cutter bracket 22, and the other end is connected to the left and right side walls of the support frame 1, for realizing the automatic return of the cutter bracket 22 after cutting is completed.

[0052] In order to realize the automatic conversion of the full and half cutting functions of the cutter mechanism, the cutter mechanism further includes a full and half cutting conversion component 6. Figure 1 and 2 As shown, the full-half-cut conversion assembly 6 includes a transmission gear set, a small cam gear 61 and a conversion mechanism. The transmission gear set is meshed with the large cam gear 52 and the small cam gear 61 respectively, and specifically includes a large gear 62, a small gear 60 and a transition shaft 64 connecting the large gear 62 and the small gear 60. The large gear 62, the small gear 60 and the transition shaft 64 are fixedly connected as a whole, and the two ends of the transition shaft 64 are movably connected to the front side wall 11 and the rear side wall 12 through bushings respectively. The large gear 62 is meshed with the large cam gear 52, and the small gear 60 is meshed with the small cam gear 61. The small cam gear 61 is arranged on the front side wall 11 through a camshaft. As shown in the attached Fig. 9 As shown, a semi-enclosed cam 611 is provided on one side of the small cam gear 61, and the semi-enclosed cam 611 has an inner arc surface 612 and an outer arc surface 613, wherein the inner arc surface 612 has a constant diameter arc surface, and the outer arc surface 613 has a variable diameter arc surface and a constant diameter arc surface connected thereto. Figure 1 , 2As shown in Figures 10 and 10, the conversion mechanism 63 includes a conversion plate 631 and a reversing spring 632. One end of the conversion plate 631 is rotatably connected to the front side wall 11, and the other end is connected to the main shaft 31 of the anvil assembly 3 through the reversing spring 632. A rotating wheel 633 is provided in the middle of the conversion plate 631, and the rotating wheel 633 is in contact with the inner and outer arc surfaces of the semi-enclosed cam 611 of the small cam gear 61. Then the small cam gear 61 rotates under the drive of the large cam gear 52. When the rotating wheel 633 forms a sliding surface with the inner arc surface 612 of the semi-enclosed cam 611, the conversion plate 631 does not move. When the rotating wheel 633 forms a sliding surface with the outer arc surface 613 of the semi-enclosed cam 611, the conversion plate 631 rotates downward under the drive of the semi-enclosed cam 611, thereby driving the reversing spring 632 to pull the main shaft 31 to rotate until the main shaft 31 rotates 90 degrees, completing the conversion between the flexible knife strip 33 and the lower cutting knife 34 in the anvil assembly 3. After the rotation of the main shaft 31 is completed, the rotating wheel 633 forms a sliding surface with the constant diameter arc surface of the outer arc surface 613, so that the main shaft 31 remains stationary.

[0053] For details, please refer to the attached Figure 6 As shown, a limit block 35 is fixed at one end of the main shaft 31, and one end of the limit block 35 is connected to the reversing spring 632, so as to realize the rotation of the main shaft 31 under the tension of the reversing spring 632. A retaining spring 36 is provided at the other end of the main shaft 31, so as to realize the automatic return of the main shaft 31 when there is no tension.

[0054] The cutter mechanism of this embodiment can be used in any existing printer to achieve full or half cutting of the printing medium, meet the various cutting form requirements of customers, greatly improve cutting efficiency, and enhance user experience.

[0055] The specific half-cutting process is as follows: Fig.17 As shown, after the printing medium completes the printing action, the printing medium is sent to the cutter cutting position through the conveying mechanism. At this time, the first gap 523 of the 1mm notch in the skirt 522 of the large cam gear 52 is just at the detection position of the position sensor, and this position is defined as the cutter 0 point position.

[0056] Refer to the attached Fig.11 and 12As shown, when cutting starts, the driving motor 4 starts to rotate counterclockwise, and the motor gear 41 drives the large cam gear 52 to rotate counterclockwise through the reduction gear 51, and the cam 521 in the large cam gear 52 also rotates counterclockwise. Since the cam surface of the large cam gear 52 is in contact with the roller 221 in the upper knife holder assembly 2, when the large cam gear 52 rotates counterclockwise, it will drive the cutter bracket 22 to slide downward along the guide rail 211. At this time, the upper cutter 23 is fixed on the cutter bracket 22, and the upper cutter 23 also moves downward. At this time, the flexible blade 33 of the anvil assembly 3 is perpendicular to the blade surface of the upper cutter 23 at 90° as the working surface. At the same time, when the large cam gear 52 rotates counterclockwise, the large gear 62 meshing with it rotates clockwise, and the large gear 62 drives the small gear 60 to rotate clockwise together. The small gear 60 meshes with the small cam gear 61, and the small cam gear 61 rotates counterclockwise. At this time, the inner arc surface 612 of the small cam gear 61 fits with the rotating shaft 633 on the conversion plate 631 and makes relative rotational motion. Since the diameter of the inner arc surface 612 does not change, the rotation of the small cam gear 61 will not have a downward force on the conversion plate 631, and the conversion plate 631 in the full-half-cut conversion mechanism 6 will not have a relative displacement, the full-half-cut conversion mechanism 6 will not work, and the anvil plate assembly 3 will remain in the initial position.

[0057] The driving motor 4 continues to rotate counterclockwise. When the large cam gear 52 drives the upper cutter 23 to a position where the end face of the blade is 0.05 mm to 0.07 mm away from the working surface of the flexible blade strip 33, the cross section of the printing medium is cut into only two connected sections with a thickness of 0.05 mm. At this time, the half-cutting function is completed. Fig.11 As shown in Figure 12. After the half-cutting function is completed, the driving motor 4 starts to rotate clockwise until the large cam gear 52 returns to the 0 o'clock position, the cutter mechanism returns to the initial state, and the whole half-cutting process is completed.

[0058] When continuous half-cutting is required, in order to save time during the entire cutting process, when the first cutting starts from the 0-point position, after the printing medium is cut, the driving motor 4 has a pre-half-cut position when it returns halfway clockwise, as shown in the attached figure. Fig.13 and 14 As shown, this is the pre-half-cut position, that is, the second gap notch position of the skirt 522 on the large cam gear 52. At this time, there is space for the printing medium to continue to enter the cutter mechanism. After the printing medium is transferred to the right position, the drive motor 4 can rotate counterclockwise again to start the next half-cut, and then return to the pre-half-cut position again until the last half-cut task is completed. The large cam gear 52 returns to the 0 o'clock position and waits for the next round of cutting tasks.

[0059] The specific process of full cutting is as follows: Fig.17As shown, after the printing medium completes the printing action, the printing medium is sent to the cutter cutting position through the conveying mechanism. At this time, the first gap 523 in the skirt 522 in the large cam gear 52 is at the position sensor position, which is defined as the cutter 0 point position.

[0060] Refer to the attached Fig.15 and 16 As shown, when cutting starts, the driving motor 4 starts to rotate clockwise, and the motor gear 41 drives the large cam gear 52 to rotate clockwise through the reduction gear 51, and the cam 521 in the large cam gear 52 also rotates clockwise. Since the cam surface of the large cam gear 52 is in contact with the roller 221 in the upper knife holder assembly 2, when the large cam gear 52 rotates clockwise, it will also drive the cutter bracket 22 to slide downward along the guide rail 211. At this time, the upper cutter 23 is fixed on the cutter bracket 22, and the upper cutter 23 also moves downward. At this time, the flexible blade 33 of the anvil assembly 3 is perpendicular to the blade surface of the upper cutter 23 at 90°. At the same time, when the large cam gear 52 rotates clockwise, the large gear 62 meshing with it rotates counterclockwise, and the large gear 62 drives the small gear 60 to rotate counterclockwise together. The small gear 60 meshes with the small cam gear 61, and the small cam gear 61 rotates clockwise. At this time, the outer arc surface 613 of the small cam gear 61 fits with the rotating shaft 633 on the conversion plate 631 and makes relative rotational motion. Since the diameter of the reducing arc surface of the outer arc surface 613 changes, there is a downward force on the rotating shaft 633, and the moving end of the conversion plate 631 in the full-half cutting conversion mechanism 6 rotates, and the reversing spring 632 connected to it moves downward, thereby driving the limit block 35 in the anvil assembly 3 to rotate, and the limit block 35 drives the main shaft 31 to rotate, so that the main shaft 31 rotates from the upward working surface of the flexible knife strip 33 to the upward working surface of the lower cutting knife 34. At this time, when the second gap of the skirt 522 of the large cam gear 52 rotates to the position sensor detection position, the cam 611 of the small cam gear 61 rotates to the maximum position of the outer arc surface, that is, the outer arc surface 613 of the cam 611 reaches the arc surface with constant diameter, the conversion plate 631 rotates to the maximum rotation position, and the reversing spring 632 is also stretched to the maximum. The reversing of the anvil assembly 3 is completed. At this time, the blade surface of the lower cutting knife 34 is tangent to the blade surface of the upper cutting knife 23, and the closest distance is 6mm. This position is defined as the full and half switching knife completion position, which is also the pre-full cutting position.

[0061] Then the driving motor 4 continues to rotate clockwise, and when the large cam gear 52 drives the blade end face of the upper cutter 23 to overlap with the blade face of the lower cutter 34 without any gap, the cross section of the printing medium is cut into two sections, front and back, and the full cutting function is realized at this time. Fig.15 and 16 After the full-cut function is completed, the drive motor 4 starts to rotate counterclockwise until the large cam gear 52 returns to the 0 o'clock position, the cutter mechanism returns to the initial state, and the full-cut process is completed.

[0062] Similarly, when continuous full cutting is required, in order to save time for the entire cutting process, when the first cutting starts from the 0 o'clock position, after the printing medium is cut, the drive motor 4 returns to the pre-full-cut position defined above when it returns counterclockwise, and the printing medium can continue to enter the cutter mechanism space. After the printing medium is transferred into place, the drive motor 4 can rotate clockwise again to start the next full cut, and then return to the pre-full-cut position again until the last full-cut task is completed. The large cam gear 52 returns to the 0 o'clock position to wait for the next round of cutting tasks.

[0063] The above process is a separate implementation process description of half cutting and full cutting. In actual use, half cutting and full cutting will be interspersed. For example, after one half cut, a full cut is performed next time, and after multiple half cuts, a full cut is performed again. The cutting mechanism of this application can complete all of these, meeting the customer's needs for various different cutting forms and greatly improving the user experience.

[0064] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Those skilled in the art may make some simple modifications, equivalent changes or modifications using the technical contents disclosed above, which all fall within the protection scope of the present invention.

Claims

1. A cutting mechanism for achieving half cutting and full cutting, characterized in that: It includes a support frame and an upper knife holder assembly, an anvil assembly, a drive motor and a gear transmission assembly arranged on the support frame. The support frame comprises a front side wall, a rear side wall, a left side wall and a right side wall; The upper knife frame assembly includes a slide rail assembly, a cutter bracket and an upper cutter, the slide rail assembly includes two guide rails and sliders arranged in the guide rails, the two guide rails are symmetrically arranged on both sides of the inner wall of the rear side wall, the cutter bracket adopts a square frame, the upper part of the square frame is provided with the upper cutter with the blade facing downward, the lower middle position of the square frame is provided with a roller, the roller shaft of the roller is perpendicular to the blade surface of the upper cutter, the two sides of the square frame are respectively fixedly connected with the sliders in the two guide rails, so as to realize the up and down movement of the square frame along the guide rails; The cutting board assembly comprises a main shaft, the two ends of which are rotatably arranged on the left side wall and the right side wall respectively, and the middle part of the main shaft is provided with two adjacent planes at 90 degrees, a flexible knife strip is fixed on one plane for realizing a half-cutting function relative to the upper cutter, and a lower cutter is fixed on the other plane for realizing a full-cutting function in contact with the upper cutter; The driving motor is arranged outside the rear side wall, and the motor shaft end thereof extends into the interior of the supporting frame; The gear transmission assembly includes a reduction gear and a large cam gear. The reduction gear is respectively meshed with the shaft end gear of the drive motor and the large cam gear. A cam is provided on one side of the large cam gear. The outer side surface of the cam is in contact with the roller at the lower part of the cutter bracket. When the large cam gear rotates under the forward and reverse rotation of the drive motor, it can act on the roller to drive the cutter bracket to slide up and down, and then drive the upper cutter to move up and down, thereby realizing the relative movement of the upper cutter and the flexible knife strip or the lower cutter in the anvil assembly, and completing the half-cutting or full-cutting action.

2. The cutting mechanism for achieving half cutting and full cutting according to claim 1, characterized in that: An arc-shaped skirt is provided on the other side of the large cam gear, and a first gap is provided on the arc-shaped skirt. The cutter mechanism also includes a position sensor for detecting the first gap to obtain the 0-point position of the large cam gear.

3. The cutting mechanism for achieving half cutting and full cutting according to claim 2, characterized in that: The arc-shaped skirt is also provided with a second gap for cooperating with the position sensor to obtain the pre-half-cut position or the pre-full-cut position of the large cam gear.

4. The cutting mechanism for achieving half cutting and full cutting according to claim 3, characterized in that: The first gap and the second gap have different widths.

5. The cutting mechanism for achieving half cutting and full cutting according to claim 1, characterized in that: The upper knife holder assembly also includes a return spring, one end of which is connected to the bottom of the cutter bracket, and the other end is connected to the support frame, so as to realize automatic return of the cutter bracket after cutting is completed.

6. The cutting mechanism for achieving half cutting and full cutting according to claim 1, characterized in that: The lower cutter adopts a V-shaped structure.

7. The cutter mechanism for achieving half cutting and full cutting according to any one of claims 1 to 6, characterized in that: It also includes a full-half-cut conversion component, which includes a transmission gear set, a small cam gear and a conversion mechanism. The transmission gear set is meshed with the large cam gear and the small cam gear respectively. A semi-enclosed cam is provided on one side of the small cam gear. The semi-enclosed cam has an inner arc surface and an outer arc surface. The inner arc surface has a constant diameter arc surface, and the outer arc surface is a variable diameter arc surface. The conversion mechanism includes a conversion plate and a reversing spring. One end of the conversion plate is rotatably connected to the front side wall, and the other end is connected to the main shaft of the anvil assembly through the reversing spring. The conversion plate A rotating wheel is provided in the middle, and the rotating wheel is in fit with the inner and outer arc surfaces of the semi-enclosed cam of the small cam gear. The small cam gear rotates under the drive of the large cam gear. When the rotating wheel forms a sliding surface with the inner arc surface of the semi-enclosed cam, the conversion plate does not move. When the rotating wheel forms a sliding surface with the outer arc surface of the semi-enclosed cam, the conversion plate rotates downward under the drive of the semi-enclosed cam, and then drives the reversing spring to pull the main shaft to rotate until the main shaft rotates 90 degrees, completing the conversion of the flexible knife strip and the lower cutting knife in the anvil assembly.

8. The cutting mechanism for achieving half cutting and full cutting according to claim 7, characterized in that: The outer arc surface of the semi-enclosed cam also includes a constant diameter arc surface connected to the variable diameter arc surface, which is used to ensure that the main shaft remains stationary after rotating 90 degrees.

9. The cutting mechanism for achieving half cutting and full cutting according to claim 8, characterized in that: A limit block is fixed at one end of the main shaft, and one end of the limit block is connected to the reversing spring, which is used to realize the rotation of the main shaft under the tension of the reversing spring. A retaining spring is provided at the other end of the main shaft, which is used to realize automatic return of the main shaft when there is no tension.

10. A printer, characterized in that: A cutting mechanism for achieving half cutting and full cutting comprising the cutting mechanism described in any one of claims 1 to 9.

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