Printer

Abstract

The utility model discloses a printer which comprises a main body and a paper tearing knife, a paper feeding channel for label paper to pass through is formed in the main body, the paper feeding channel is provided with a paper feeding end and a paper discharging end, the paper tearing knife is arranged on the main body and located at the paper discharging end of the paper feeding channel, the paper tearing knife comprises a connecting part and a paper tearing part, the connecting part is connected to the main body, and the paper tearing part is connected to the main body. The paper tearing part is arched towards the direction far away from the connecting part, so that along with the proceeding of paper tearing, even if the label paper is taken out, the paper tearing knife is arched towards the direction far away from the connecting part, the stroke of part of the label paper is compensated equivalently, the edge of the torn paper can be kept to be a straight line, and the label paper can be prevented from being torn to a printing area of the label paper; and the paper waste is reduced.

Description

TECHNICAL FIELD

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

[0002] In the related art, a label printer has a paper passing channel, and a paper tearing knife is arranged at the end of the paper passing channel. The blade of the paper tearing knife is configured in a sawtooth shape. However, when a user tears the paper, the label paper is taken out of the paper passing channel, which causes the edge of the torn label paper to be not flat enough, and sometimes even tears the printing area of the label paper, resulting in waste of the paper in the printing area. CONTENT OF THE UTILITY MODEL

[0003] The embodiments of the present application provide a printer, which can solve the technical problem that when tearing the paper, the label paper is taken out of the paper passing channel, which causes the edge of the torn label paper to be not flat enough, and sometimes even tears the printing area of the label paper, resulting in waste of the paper in the printing area.

[0004] In a first aspect, the embodiments of the present application provide a printer, comprising:

[0005] a main body, which forms a paper passing channel for passing label paper, the paper passing channel having an inlet end and an outlet end;

[0006] a paper tearing knife, which is arranged on the main body and located at the outlet end of the paper passing channel, the paper tearing knife comprising a connecting portion and a paper tearing portion, the connecting portion being connected to the main body, and the paper tearing portion being arched away from the connecting portion.

[0007] In some embodiments, the distance between the arch top of the paper tearing portion and the two ends of the paper tearing portion along the width direction of the paper tearing knife is h1, and h1 satisfies: 0.5mm≤h1≤3mm.

[0008] In some embodiments, the paper tearing portion is a symmetrical structure.

[0009] In some embodiments, the paper tearing knife has a first end face and a second end face which are distributed along the length direction of the paper tearing knife, and the distance between the arch top of the paper tearing portion and the first end face is less than the distance between the arch top of the paper tearing portion and the second end face.

[0010] In some embodiments, the side of the connecting portion facing the paper tearing portion is an arc surface.

[0011] In some embodiments, the main body comprises a main machine and a cover, the cover being rotationally connected to the main machine, so that the cover has a closed position and an open position, and when the cover is located at the closed position, the main machine and the cover form the paper passing channel.

[0012] In some embodiments, the paper tearing cutter is arranged in one of the main body and the cover.

[0013] In some embodiments, the paper passing channel has two side walls arranged at intervals, the paper tearing cutter is arranged in one of the two side walls, and the paper tearing cutter is arranged at an angle with the side wall in which the paper tearing cutter is arranged.

[0014] In some embodiments, the angle between the paper tearing cutter and the side wall in which the paper tearing cutter is arranged is α, and α satisfies 5°≤α≤60°.

[0015] In some embodiments, at least one of the side walls is provided with a plurality of paper guiding ribs arranged along the paper passing direction of the paper passing channel, and the plurality of paper guiding ribs are arranged at intervals along the length direction of the paper tearing cutter.

[0016] In some embodiments, the upper surface of the main body is an arc surface protruding away from the direction of the paper passing channel.

[0017] In some embodiments, the paper tearing part is located inside the paper passing channel.

[0018] In some embodiments, in the vertical direction, the distance between the paper tearing cutter and the end surface of the paper outlet end away from the paper inlet end is h2, and h2 satisfies 1mm≤h2≤3.5mm.

[0019] In some embodiments, the side of the paper tearing cutter away from the paper tearing part is provided with a connecting part, the connecting part is connected to the main body, and the connecting part is located outside the paper passing channel.

[0020] In some embodiments, in the length direction of the paper tearing cutter, the distance between the two ends of the paper passing channel is less than the length of the paper tearing cutter.

[0021] The printer based on the embodiments of the present application comprises a main body and a paper tearing cutter, the main body is formed with a paper passing channel for passing label paper, the paper passing channel has a paper inlet end and a paper outlet end, the paper tearing cutter is arranged in the main body and located at the paper outlet end of the paper passing channel, the paper tearing cutter comprises a connecting part and a paper tearing part, the connecting part is connected to the main body, and the paper tearing part is arched away from the connecting part. Thus, as the paper tearing proceeds, even if the label paper is taken out, since the paper tearing cutter is arched away from the connecting part, the travel of the label paper is compensated, the edge of the paper tearing can be kept straight, the printing area of the label paper can be avoided from being torn, and the waste of paper is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the accompanying drawings in the following description only only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative labor.

[0023] Figure 1 The structure schematic view of the printer cover body provided by the embodiment of the present application in the closed position is shown in the figure.

[0024] Figure 2 The structure schematic view of the printer cover body provided by the embodiment of the present application in the open position is shown in the figure.

[0025] Figure 3 The structure schematic view of the printer provided by the embodiment of the present application is shown in the figure. Figure 1 The structure schematic view of the printer from another perspective provided by the embodiment of the present application is shown in the figure.

[0026] Figure 4 The structure schematic view of the printer provided by the embodiment of the present application is shown in the figure. Figure 3 The sectional structure schematic view of the printer at A-A provided by the embodiment of the present application is shown in the figure.

[0027] Figure 5 The enlarged schematic view of the A part provided by the embodiment of the present application is shown in the figure. Figure 4 The enlarged schematic view of the B part provided by the embodiment of the present application is shown in the figure.

[0028] Figure 6 The internal structure schematic view of the printer provided by the embodiment of the present application is shown in the figure.

[0029] Figure 7 The enlarged schematic view of the B part provided by the embodiment of the present application is shown in the figure. Figure 6 The enlarged schematic view of the B part provided by the embodiment of the present application is shown in the figure.

[0030] Figure 8 The structure schematic view of the paper tearing knife provided by the embodiment of the present application is shown in the figure.

[0031] The reference signs in the figure:

[0032] 10, main body; 10a, paper bin; 10b, paper feeding channel; 10b1, paper feeding end; 10b2, paper discharging end; 10b3, side wall surface; 10b4, paper guiding rib; 101, matching part;

[0033] 110, main machine;

[0034] 120, cover body;

[0035] 20, paper tearing knife; 21, connecting part; 211, first connecting part; 212, second connecting part; 2121, positioning part; 22, paper tearing part; 221, vault; 20a, first end surface; 20b, second end surface. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0037] The label printer has a paper running channel, and a paper tearing knife is arranged at the end of the paper running channel, and the cutting edge of the paper tearing knife is configured in a sawtooth shape. However, when the user tears the paper, the label paper will be taken out along with the tearing, so that the edge of the torn label paper is not flat enough, and sometimes even tears the printing area of the label paper, and the paper in the printing area is wasted.

[0038] To solve the above technical problems, please refer to Figures 1-2 The present application provides a printer, which comprises a main body 10 and a paper tearing knife 20. The main body 110 and the paper tearing knife 20 will be further described below in combination with the drawings.

[0039] The main body 110 is the main body 10 structure of the printer, which provides stable support for all other components, ensuring the stability and durability of the printer during operation. In addition, the main body 110 is the core component of the entire label printer, responsible for controlling the printing process, processing print data, and providing support and power for other components. The main body 110 integrates circuit boards, power management modules, data processing units and other key electronic components. When receiving a print instruction, the heating print head makes the ink or carbon powder on the ribbon transfer to the paper or other media, completing the printing task.

[0040] Please refer to Figures 3-5 The main body 10 forms a paper bin 10a for placing label paper inside, and a paper running channel 10b communicating with the paper bin 10a. The paper running channel 10b has a paper inlet end 10b1 and a paper outlet end 10b2. The paper inlet end 10b1 guides the unprinted label paper in the paper bin 10a into the paper running channel 10b, and the paper running channel 10b restricts the direction of the paper to ensure the accuracy of the label paper printing. The paper outlet end 10b2 guides the printed label paper to travel to the outside of the main body 10 according to the preset path.

[0041] Please refer to Figures 6-8The tearing knife 20 is arranged on the main body 10 and located at the paper outlet end 10b2 of the paper passing channel 10b, so as to tear the printed label paper. The tearing knife 20 comprises a connecting portion 21 and a tearing portion 22. The connecting portion 21 is connected to the main body 10, and the tearing portion 22 is arched away from the connecting portion 21. The tearing portion 22 is the part directly contacting the label paper. By arching the tearing portion 22 away from the connecting portion 21, even if the label paper is taken out by the user when tearing, the arched part can compensate for the travel of part of the label paper, so that the edge of the torn paper can remain straight, and the printed area of the label paper can be avoided from being torn, thereby reducing the waste of paper.

[0042] Optionally, the distance between the arch top 221 of the tearing portion 22 and the two ends of the tearing portion 22 along the width direction of the tearing knife 20 is h1, and h1 satisfies 0.5mm≤h1≤3mm. h1 can be 0.5mm, 1mm, 2mm, 3mm or any range between any two of the above values.

[0043] It should be understood that, in the tearing process, the printer generally clamps the label paper to avoid the label paper from being unable to exert force when tearing. However, since the tearing is an instantaneous force, the length of the part of the label paper pulled out by the tearing is generally not large. Therefore, the appropriate size of h1 not only reduces the cost, but also facilitates the miniaturization and lightweight design of the entire printer.

[0044] In addition, since the label paper generally comprises a base paper and a plurality of face papers, the face papers are generally attached to the base paper, and the tearing is mainly performed on the base paper region between the adjacent two face papers. By setting h1 in the above range, the arching height of the tearing portion 22 is also appropriate, that is, the compensation distance that the tearing portion 22 can achieve when the label paper is torn is also appropriate, so that the spacing between the adjacent two face papers in the label paper is appropriate, thereby ensuring the space utilization rate of the face papers.

[0045] In an embodiment, the tearing portion 22 has a symmetrical structure. The symmetrical structure allows the stress to be uniformly distributed along the center line when the tearing portion 22 is subjected to tension, thereby avoiding deformation or fatigue caused by unilateral overload. The symmetrical design allows the user to tear the label paper from left to right or from right to left without distinguishing the front and back, thereby improving the operation flexibility and being suitable for multiple user scenarios.

[0046] In addition, the symmetrical structure can be produced by mirror processing or a single mold, thereby reducing the mold opening cost and production cycle. Moreover, during installation, the symmetrical structure can be compatible with more installation directions, thereby improving the installation efficiency.

[0047] In another embodiment, the tearing knife 20 has a first end face 20a and a second end face 20b which are spaced apart along the length direction of the tearing knife 20. The distance between the arch top 221 of the tearing portion 22 and the first end face 20a is less than the distance between the arch top 221 of the tearing portion 22 and the second end face 20b.

[0048] With reference to the orientation shown, the first end face 20a can be the end face on the left side of the paper tearing knife 20, and the second end face 20b can be the end face on the right side of the paper tearing knife 20. Of course, the first end face 20a can also be the end face on the right side of the paper tearing knife 20, and the second end face 20b can be the end face on the left side of the paper tearing knife 20. Figure 8 With reference to the orientation shown, the first end face 20a can be the end face on the left side of the paper tearing knife 20, and the second end face 20b can be the end face on the right side of the paper tearing knife 20. Of course, the first end face 20a can also be the end face on the right side of the paper tearing knife 20, and the second end face 20b can be the end face on the left side of the paper tearing knife 20.

[0049] The distance between the vault 221 of the paper tearing part 22 and the first end face 20a is less than the distance between the vault 221 of the paper tearing part 22 and the second end face 20b, that is, the vault 221 of the paper tearing part 22 can be selected to be close to the left side or the right side. In general, the user's tearing habit is from the left to the right side, at this time, the left side bears more force, so the left side of the label paper is relatively pulled out more, and therefore the first end face 20a is the end face on the left side of the paper tearing knife 20. By making the vault 221 of the paper tearing part 22 close to the left side, the stroke of the label paper near the left side can be compensated, thereby ensuring that the tearing edge of the label paper is flush.

[0050] Therefore, whether the first end face 20a is the end face on the left side of the paper tearing knife 20 or the end face on the right side of the paper tearing knife 20 can be customized according to the actual use habit of the user.

[0051] Please refer to Figure 8 The side of the connecting part 21 facing the paper tearing part 22 is an arc surface. Since the paper tearing part 22 generally includes a plurality of paper tearing knife edges arranged at intervals along the length direction of the paper tearing knife 20, by making the side of the connecting part 21 facing the paper tearing part 22 an arc surface, the paper tearing knife edges can automatically form an arch shape when installed on the connecting part 21.

[0052] That is, various sizes of paper tearing knife edges do not need to be designed, and only a single specification of paper tearing knife edge needs to be designed, thereby reducing the number of molds and the production complexity.

[0053] Of course, it can be understood that the entire paper tearing knife 20 can also be integrally injection molded or integrally forged, thereby ensuring the strength of the entire paper tearing knife 20.

[0054] Please refer to Figure 2 Further, the main body 10 includes a main machine 110 and a cover body 120. The cover body 120 is rotationally connected to the main machine 110, so that the cover body 120 has an open cover position and a closed cover position. When the cover body 120 is located at the closed cover position, a paper running channel 10b is formed between the main machine 110 and the cover body 120.

[0055] When the cover body 120 is located at the closed cover position, the paper bin 10a can be protected from dust from the outside entering the paper bin 10a, and the paper running channel 10b can be formed between the main machine 110 and the cover body 120, thereby limiting the paper running direction of the label paper.

[0056] When the cover 120 is in the open position, the paper bin 10a can be exposed, which is convenient for the user to replace the label paper and also facilitates the inspection of the print head, sensor and other structures on the host 110.

[0057] In the light of the above, the paper cutter 20 can be arranged on the host 110 or the cover 120. When the paper cutter 20 is arranged on the host 110, the host 110 does not need to be opened and closed like the cover 120, and when tearing paper, no opening force is applied to the cover 120 in the opening direction, so the cover 120 is not easily permanently displaced relative to the host 110 due to long-term tearing of paper, which makes it difficult for the cover 120 to cooperate with the host 110 to clamp the label paper when the cover 120 is closed, thereby affecting the printing effect.

[0058] When the paper cutter 20 is arranged on the cover 120, the paper cutter 20 is directly exposed after the cover 120 is opened, which is convenient for replacing and repairing the paper cutter 20.

[0059] Please refer to Figure 5 , the paper path 10b has two side wall surfaces 10b3 arranged at intervals, the paper cutter 20 is arranged in one of the two side wall surfaces 10b3, and the paper cutter 20 is arranged at an angle with the side wall surface 10b3 where the paper cutter 20 is arranged.

[0060] By arranging the paper cutter 20 at an angle with the side wall surface 10b3 where the paper cutter 20 is arranged, the label paper can be conveniently arranged at an angle with the paper cutter 20, which is conducive to tearing the label paper. In addition, based on the arrangement of the paper cutter 20 at an angle with the side wall surface 10b3 where the paper cutter 20 is arranged, when tearing paper, the tearing part 22 has a certain avoidance area with the side wall surface 10b3 where the paper cutter 20 is arranged, so that the label paper can be fully contacted with the paper cutter 20, thereby ensuring the smoothness of the tearing.

[0061] It can be understood that when the main body 10 includes the host 110 and the cover 120, one of the two side wall surfaces 10b3 is formed by the host 110, and the other side wall surface 10b3 is formed by the cover 120.

[0062] In the light of the above, please continue to refer to Figure 5 , the angle between the paper cutter 20 and the side wall surface 10b3 where the paper cutter 20 is arranged is α, and α satisfies: 5°≤α≤60°, wherein α can be 5°, 10°, 20°, 30°, 40°, 50°, 60° or any range between any two of the above values.

[0063] By α being in the above range, the label paper can be conveniently formed with an included angle with the paper tearing knife 20, so that the paper tearing knife 20 can be pressed against the label paper, thereby facilitating the tearing of the label paper, and the paper tearing part 22 can also have a certain spacing with the side wall surface 10b3 where the paper tearing knife 20 is located, so that the label paper is in full contact with the paper tearing knife 20, thereby ensuring the smoothness of the tearing.

[0064] In addition, by α being in the above range, when the size of the paper tearing knife 20 is certain, the paper tearing knife 20 does not excessively occupy the vertical space, i.e. reduces the risk of the paper tearing knife 20 protruding from the main body 10 and hurting people, and at the same time, the paper tearing knife 20 also does not excessively occupy the space of the paper passing channel 10b, thereby ensuring the smoothness of the label paper passing.

[0065] In order to improve the smoothness of the label paper passing in the paper passing channel 10b, please refer to Figure 5 , at least one side wall surface 10b3 is provided with a plurality of paper guide ribs 10b4, the paper guide ribs 10b4 are arranged along the passing direction of the paper passing channel 10b, and the plurality of paper guide ribs 10b4 are arranged in the length direction of the paper tearing knife 20.

[0066] The paper tearing knife 20 can reduce the contact area between the label paper and the side wall surface 10b3, thereby reducing the friction and improving the smoothness of the passing, and the paper guide ribs 10b4 along the passing direction of the paper passing channel 10b can also guide the passing of the label paper, thereby further ensuring the smoothness of the passing of the label paper.

[0067] It can be understood that one side wall surface 10b3 can be provided with the paper guide ribs 10b4, or both side wall surfaces 10b3 can be provided with the paper guide ribs 10b4, when one side wall surface 10b3 is formed by the main body 110 and the other side wall surface 10b3 is formed by the cover body 120, i.e. the main body 110 can be provided with the paper guide ribs 10b4, or the cover body 120 can be provided with the paper guide ribs 10b4, or both the main body 110 and the cover body 120 can be provided with the paper guide ribs 10b4, which is specifically set according to the actual situation.

[0068] Since the part of the label paper in the paper passing channel 10b and the part outside the paper passing channel 10b form an included angle during the tearing of the label paper, the tearing of the label paper is facilitated, and by the upper surface of the main body 10 being an arc surface protruding away from the paper passing channel 10b, the part of the label paper outside the paper passing channel 10b is attached to the arc surface, so that the label paper can displace along the arc surface during the tearing process, so that the displacement of the label paper is relatively smooth, thereby improving the smoothness of the tearing.

[0069] Please refer to Figure 5In an embodiment, the paper tearing part 22 is located inside the paper passing channel 10b. Since the main body 10 forms the paper passing channel 10b, when the paper tearing part 22 is located inside the paper passing channel 10b, i.e. the paper tearing part 22 is located inside the main body 10 and does not protrude from the outer surface of the main body 10, thus, when a user contacts the printer, it is difficult to be cut by the protruding paper tearing part 22, thereby ensuring the safety of the entire printer.

[0070] Further, in the vertical direction, the distance between the paper tearing knife 20 and the end surface of the paper outlet end 10b2 away from the paper inlet end 10b1 is h2, and h2 satisfies: 1mm≤h2≤3.5mm, wherein h2 can be 1mm, 2mm, 2.5m, 3.5mm or any value between any two of the above, by h being in the above range, when a user contacts the printer, it is difficult to be cut by the protruding paper tearing part 22, thereby ensuring the safety of the entire printer.

[0071] In addition, reasonable h2 can ensure that the label paper is easy to contact the paper tearing knife 20, thereby ensuring the convenience of paper tearing.

[0072] In an embodiment of the present application, referring to Figures 7-8 The connecting part 21 comprises a first connecting part 211 and a second connecting part 212 connected to each other, the first connecting part 211 is connected with the paper tearing part 22, and the second connecting part 212 is provided with a positioning part 2121, and the main body 10 is provided with a cooperating part 101 cooperating with the positioning part 2121.

[0073] That is, the entire paper tearing knife 20 is connected to the main body 10 through the second connecting part 212, and through the cooperation of the positioning part 2121 and the cooperating part 101, the connecting part 21 can be quickly aligned with the main body 10 interface, reducing assembly error and improving production efficiency.

[0074] The cooperation between the positioning part 2121 and the cooperating part 101 can adopt concave-convex buckles, pin hole structures, etc., and of course other fastening structures are also needed to increase the connection strength between the connecting part 21 and the main body 10.

[0075] Optionally, in an embodiment of the present application, in the length direction of the paper tearing knife 20, the distance between the two ends of the paper passing channel 10b is less than the length of the paper tearing knife 20, i.e. the paper tearing knife 20 does not protrude from the main body 10 design in the length direction of the paper tearing knife 20, thereby meeting the miniaturization design of the printer.

[0076] It can be understood that accidental collision during transportation and use can also be avoided to cause damage to the blade, and the risk of user touching the sharp edge is also reduced.

[0077] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it is understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationships in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0078] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A printer characterized by comprising: The application relates to a paper tearing device for a label printer. The paper tearing device comprises: a main body, which is provided with a paper passing channel for passing label paper, the paper passing channel having a paper inlet end and a paper outlet end; and a paper tearing cutter, which is arranged on the main body and located at the paper outlet end of the paper passing channel, the paper tearing cutter comprising a connecting part and a paper tearing part, the connecting part being connected to the main body, and the paper tearing part being arched away from the connecting part.

2. The printer of claim 1, wherein, The distance between the arch top of the paper tearing part and the two ends of the paper tearing part along the width direction of the paper tearing cutter is h1, and h1 satisfies 0.5mm<=h1<=3mm.

3. The printer of claim 1, wherein, The paper tearing part is of a symmetrical structure.

4. The printer of claim 1, wherein, The paper tearing cutter is provided with a first end face and a second end face which are distributed along the length direction of the paper tearing cutter, the distance between the arch top of the paper tearing part and the first end face is smaller than the distance between the arch top of the paper tearing part and the second end face.

5. The printer of claim 1, wherein, The side of the connecting part facing the paper tearing part is an arc surface.

6. The printer of claim 1, wherein, The main body comprises a main machine and a cover, the cover being rotationally connected to the main machine so that the cover has an open position and a closed position, and the paper passing channel is formed between the main machine and the cover when the cover is located at the closed position.

7. The printer of claim 6, wherein, The paper tearing cutter is arranged on one of the main machine and the cover.

8. The printer of claim 1, wherein, The paper passing channel is provided with two side wall surfaces which are arranged at intervals, the paper tearing cutter is arranged on one of the two side wall surfaces, and the paper tearing cutter is arranged at an included angle with the side wall surface on which the paper tearing cutter is arranged.

9. The printer of claim 8, wherein, The included angle between the paper tearing cutter and the side wall surface on which the paper tearing cutter is arranged is alpha, and alpha satisfies 5<=alpha<=60.

10. The printer of claim 8, wherein, At least one of the side wall surfaces is provided with a plurality of paper guide ribs, the paper guide ribs are arranged along the paper passing direction of the paper passing channel, and the plurality of paper guide ribs are arranged at intervals along the length direction of the paper tearing cutter.

11. The printer of claim 1, wherein, The upper surface of the main body is an arc surface which is convex in the direction away from the paper passing channel.

12. The printer of claim 1, wherein, The paper tearing part is located inside the paper passing channel.

13. The printer of claim 12, wherein, In the vertical direction, the distance between the paper tearing cutter and the end surface of the paper outlet end away from the paper inlet end is h2, and h2 satisfies 1mm<=h2<=3.5mm.

14. The printer of claim 1, wherein, The connecting part comprises a first connecting part and a second connecting part which are connected to each other, the first connecting part is connected to the paper tearing part, the second connecting part is provided with a positioning part, and the main body is provided with a matching part which matches the positioning part.

15. The printer of claim 1, wherein, In the length direction of the paper tearing cutter, the distance between the two ends of the paper passing channel is smaller than the length of the paper tearing cutter.

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