CN117021788B

CN117021788B - Rotary cutter structure and portable printing equipment

Info

Publication number: CN117021788B
Application number: CN202311305150.9A
Authority: CN
Inventors: 李朝用; 刘丹
Original assignee: Zhuhai Xinye Electronic Technology Co Ltd
Current assignee: Zhuhai Xinye Electronic Technology Co Ltd
Priority date: 2023-10-10
Filing date: 2023-10-10
Publication date: 2024-01-16
Anticipated expiration: 2043-10-10
Also published as: CN117021788A

Abstract

The invention relates to the technical field of printing equipment, and discloses a rotary cutter structure and portable printing equipment, wherein the rotary cutter structure comprises a surface cover, a sliding block, a shifting block, a fixed cutter strip, a guide rail and a spring block. The surface cover is provided with a paper outlet, and one side of the paper outlet is provided with a first guide groove; the sliding block is arranged on the inner side of the surface cover in a sliding way, and the shifting block penetrates through the first guide groove to be connected with the sliding block; the fixed knife strip is arranged in the surface cover and is close to the paper outlet; the guide rail is arranged on the inner side of the surface cover, and a first guide surface and a second guide surface are arranged at two ends of the guide rail; the bullet piece is provided with the limit structure who matches with the guide rail, and the bullet piece rotates towards the one end of fixed knife strip and is provided with the cutter, is provided with the elastic component between bullet piece and the slider. In this rotatory cutter structure, the bullet piece can drive the cutter and remove and overturn in the direction of delivery opening and fixed knife strip under the guiding action of first guide face and second guide face, can improve the safety in utilization of cutter, avoids cutter fish tail user, also does not influence delivery opening delivery.

Description

Rotary cutter structure and portable printing equipment

Technical Field

The invention relates to the technical field of printing equipment, in particular to a rotary cutter structure and portable printing equipment.

Background

With the development of printing technology, the portability of the printing device is increasing, and when a user uses the portable printing device to print, the lengths of the used printing papers are different due to different lengths of the printing contents, so that the printing papers are often required to be cut according to the lengths of the printing contents. Printing equipment among the prior art can set up the cutter in paper outlet department and realize the cutting of printing paper, but the cutter exposes in paper outlet department, and the security is relatively poor, leads to the user to be injured easily, and cuts unsmoothly, cuts bad paper easily, still can influence the normal paper of printer. And the cutter rotation of the existing printing equipment is often realized through friction between a rubber ring and a side wall, so that slipping is easy, and the cutter rotation of some printing equipment is driven by a motor, so that the volume and the power consumption of the equipment are increased, and portability is affected.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide a rotary cutter structure and portable printing equipment, which can be provided with a telescopic lifting cutter, so that the cutting safety is improved.

In order to solve the problems, the technical scheme adopted by the invention is as follows: a rotary cutter structure comprising: the surface cover is provided with a paper outlet and a first guide groove, and the first guide groove is positioned at one side of the paper outlet; the sliding block is arranged on the inner side of the surface cover in a sliding manner and can slide back and forth along the first guide groove; the shifting block is arranged on the outer side of the face cover and penetrates through the first guide groove to be connected with the sliding block; the fixed knife strip is arranged in the surface cover and is close to the paper outlet; the guide rail is arranged on the inner side of the surface cover and is positioned between the first guide groove and the paper outlet, two ends of the guide rail are provided with a first guide surface and a second guide surface, the first guide surface faces the end part of the guide rail and inclines towards the direction far away from the paper outlet, the second guide surface is positioned on one side of the guide rail far away from the surface cover, and the second guide surface faces the two ends of the guide rail and inclines towards the direction far away from the surface cover; the elastic block is slidably connected with the guide rail through a limiting structure, is slidably and rotatably connected with the sliding block, a cutter is rotatably arranged at one end, close to the fixed knife strip, of the elastic block, an elastic piece is arranged between the elastic block and the sliding block, and the elastic piece can apply a pulling force to the elastic block towards the paper outlet; when the sliding block moves to the two ends of the first guide groove, the elastic block moves away from the paper outlet under the guidance of the first guide surface and turns over in the direction away from the fixed knife strip under the guidance of the second guide surface.

Compared with the prior art, the invention has the beneficial effects that: this rotary cutter structure can be through manual shifting the shifting block and slide along first guide slot to drive slider and bullet piece and slide along the paper outlet, realize the cutting of cutter to the paper. When the slider is located the middle section of first guide slot, the bullet piece breaks away from the spacing of first guide face and second guide face, and the bullet piece removes the upset to the paper outlet direction under the pulling force effect of elastic component, makes the cutter stretch into in the paper outlet and offset with fixed knife strip in order to form the blade of V type, is convenient for carry out smooth cutting to the paper, avoids damaging the paper. After cutting, the slider is located the both ends of first guide slot, and the bullet piece overcomes the pulling force of elastic component and removes and overturn to the direction of keeping away from exit slot and fixed strip under the guide of first guide face and second guide face for the cutter leaves the exit slot region, and separates with fixed strip, can improve the safety in utilization of cutter, avoids cutter fish tail user, also does not influence exit slot paper.

According to the rotary cutter structure, the gear is arranged on the mandrel of the cutter, the rack matched with the gear is arranged on one side, close to the sliding block, of the paper outlet, and when the sliding block slides along the first guide groove, the gear can be meshed with the rack to enable the cutter to rotate under the cooperation of the gear and the rack.

The rotary cutter structure comprises a rotary cutter body, wherein one of the rotary cutter body and the rotary cutter body is provided with a sliding groove, the other rotary cutter body is provided with a rotary shaft corresponding to the sliding groove, the rotary shaft stretches into the sliding groove and can slide along the sliding groove, and the rotary cutter body is connected with the sliding groove in a sliding and rotating mode through the cooperation of the rotary shaft and the sliding groove.

According to the rotary cutter structure, the two sliding grooves are formed in the elastic block, the two sliding grooves are symmetrically formed in two sides of the elastic block, and the two rotating shafts are symmetrically arranged on the sliding block at positions corresponding to the sliding grooves.

The rotary cutter structure comprises a rotary cutter body and a plurality of sliding grooves, wherein a rotary limiting rib is arranged between the sliding grooves, one end of each rotary limiting rib, which is opposite to the cutter, is provided with an arc surface, and the arc surface is bent towards the direction away from the sliding block.

According to the rotary cutter structure, the elastic piece is the tension spring, and the tension spring is far away from the face cover than the rotating shaft.

According to the rotary cutter structure, the second guide groove is formed between the guide rail and the paper outlet, and the inclined sections corresponding to the first guide surface are arranged at two ends of the second guide groove.

Foretell rotatory cutter structure, limit structure includes first spacing bead, the spacing bead of second and the spacing bead of third, first spacing bead with form spacing slit between the spacing bead of second, the spacing bead of third set up in the spacing slit, the guide rail passes spacing slit.

The rotary cutter structure comprises a first limiting rib and a second limiting rib, wherein the first limiting rib and the second limiting rib are U-shaped, and U-shaped protrusions of the first limiting rib and the second limiting rib are oppositely arranged to form the limiting slit.

A portable printing device comprises the rotary cutter structure.

The invention is described in further detail below with reference to the drawings and the detailed description.

Drawings

FIG. 1 is a top view of a rotary cutter structure according to an embodiment of the present invention;

FIG. 2 is a bottom view of a rotary cutter structure according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view at A-A of FIG. 2;

FIG. 4 is an exploded view of a cutter portion of a rotary cutter structure according to an embodiment of the present invention;

FIG. 5 is a schematic rear view of a cutter portion of a rotary cutter structure according to an embodiment of the present invention;

FIG. 6 is a partial cross-sectional view of a rotary cutter structure according to an embodiment of the present invention;

FIG. 7 is a schematic view of a guide rail according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view of FIG. 7 at B-B;

fig. 9 is a schematic view showing an internal structure at a paper outlet of a portable printing apparatus according to an embodiment of the present invention;

fig. 10 is a cross-sectional view of a portable printing apparatus according to an embodiment of the present invention at a paper outlet.

Reference numerals illustrate:

100 face covers, 110 paper outlets, 120 first guide grooves, 130 guide rails, 131 first guide surfaces, 132 second guide surfaces, 140 second guide grooves, 150 racks, 160 lower covers, 170 upper covers, 200 sliding blocks, 210 rotating shafts, 220 sliding limiting bosses, 300 shifting blocks, 400 fixed blades, 410 pressing strips, 500 elastic blocks, 510 cutters, 511 gears, 512 shaft sleeves, 513 spindles, 520 limiting structures, 521 first limiting ribs, 522 second limiting ribs, 523 third limiting ribs, 530 sliding grooves, 540 rotation limiting ribs, 600 elastic pieces, 700 printing head assemblies and 710 printing rubber rollers.

Detailed Description

Embodiments of the present invention are described in detail below, and with reference to fig. 1, 2, 7 and 8, the embodiments of the present invention provide a rotary cutter structure for cutting printed paper to achieve cutting of printed paper according to the length of the print content, and printing of non-A4-specification paper. The rotary cutter structure comprises a surface cover 100, wherein the surface cover 100 is provided with a paper outlet 110, one side of the paper outlet 110 is provided with a first guide groove 120, the outer side of the surface cover 100 is provided with a shifting block 300, the inner side of the surface cover 100 is provided with a sliding block 200, a part of area of the shifting block 300 penetrates through the first guide groove 120 and stretches into the inner side of the surface cover 100 to be connected with the sliding block 200, and when the rotary cutter structure is used, the shifting block 300 can be shifted to enable the sliding block 200 to slide reciprocally along the first guide groove 120.

Referring to fig. 2 and 3, a guide rail 130 is provided at the inner side of the cover 100, and the guide rail 130 is provided between the first guide groove 120 and the paper outlet 110. Referring to fig. 7 to 9, both ends of the guide rail 130 are provided with first guide surfaces 131, and the first guide surfaces 131 are inclined toward the end of the guide rail 130 and toward a direction away from the paper outlet 110 in the X1X2 direction. Referring to fig. 8, at a position corresponding to the first guide surface 131, second guide surfaces 132 are further provided at both ends of the guide rail 130, and the second guide surfaces 132 are inclined toward the end of the guide rail 130 and away from the face cover 100 in the Z1Z2 direction. Specifically, referring to the enlarged partial view of fig. 9, the first guide surface 131 is located at a side wall of the guide rail 130, and the second guide surface 132 is located at a side of the guide rail 130 remote from the face cover 100.

Referring to fig. 2, a spring block 500 is slidably and rotatably provided on the slider 200, referring to fig. 3 and 4, a limit structure 520 matched with the guide rail 130 is provided on the spring block 500, a fixed knife bar 400 is provided on one side of the paper outlet 110 far from the slider 200, a rotatable cutter 510 is provided on one end of the spring block 500 near the fixed knife bar 400, an elastic member 600 is provided between the spring block 500 and the slider 200, and the elastic member 600 can apply a pulling force to the spring block 500 toward the paper outlet 110.

Specifically, the first guide surface 131 is used to move the cutter 510 away from or near the paper outlet 110 in the X1X2 direction, and the second guide surface 132 is used to lift the cutter 510 in the Z1Z2 direction to move the cutter 510 away from or against the fixed blade 400. Specifically, when the slider 200 is located at two ends of the first guide groove 120, the first guide surface 131 guides the pellet block 500 to slide away from the paper outlet 110 through the limiting structure 520 on the pellet block 500, and the second guide surface 132 turns the pellet block 500 away from the fixed blade 400. When the slider 200 is located at the middle section of the first guide groove 120, the elastic block 500 is separated from the limiting effect of the first guide surface 131 and the second guide surface 132, and the elastic block 500 slides towards the paper outlet 110 and turns towards the fixed blade 400 under the tensile force of the elastic member 600, so that the blade portion of the cutter 510 abuts against the fixed blade 400 to form a V-shaped cutting edge. Specifically, the width of both ends of the guide rail 130 is wider than that of the middle region, and both ends of the guide rail 130 are farther from the paper outlet 110 than the middle region in the X1-X2 direction.

Specifically, when the slider 200 slides from the middle portion to the two ends along the first guide groove 120, after the elastic block 500 passes over the first guide surface 131 and the second guide surface 132, the cutter 510 is separated from the fixed blade 400 and away from the paper outlet 110 under the action of the first guide surface 131 and the second guide surface 132, so that the cutter 510 is prevented from affecting the normal paper outlet of the printing apparatus, and the cutter 510 is prevented from being scratched due to the fact that a finger is erroneously inserted into the paper outlet 110 during operation. When the slider 200 is located in the middle of the first guide slot 120, the elastic block 500 slides towards the paper outlet 110 and turns over towards the fixed blade 400 under the tension of the elastic member 600, so that the cutting edge of the cutter 510 abuts against the fixed blade 400. Therefore, when the paper needs to be cut, only the shifting block 300 is required to be shifted, so that the slider 200 slides from one end to the other end along the first guide groove 120, and the cutter 510 can extend into the paper outlet 110 and form a V-shaped cutting edge against the fixed knife bar 400, so that the paper is cut and then retracted to a position far away from the paper outlet 110, thereby being safe and convenient.

Referring to fig. 3 and 10, in order to facilitate installation and maintenance, the face cover 100 is formed by combining an upper cover 170 and a lower cover 160, and the paper outlet 110 is formed at a junction of the upper cover 170 and the lower cover 160. The fixed blade 400 is disposed at the upper edge of the lower cover 160 by the pressing bar 410, the rest of the structure is disposed on the upper cover 170, and the slider 200 and the elastic block 500 are disposed in the cavity between the fixing plate of the printhead assembly 700 and the upper cover 170. The first guide surface 131 and the second guide surface 132 may be cambered surfaces or inclined surfaces, and in this embodiment, referring to fig. 7 to 9, the first guide surface 131 and the second guide surface 132 are both inclined surfaces.

Referring to fig. 2, 4 and 5, in the present embodiment, the cutter 510 is in a disc shape, the cutting edge of the cutter 510 is located at the outer peripheral edge of the disc-shaped structure, the cutter 510 is rotatably disposed on the elastic block 500 through the shaft sleeve 512 and the spindle 513, in order to prevent the cutter 510 from slipping due to insufficient friction force when rotating, the spindle 513 is provided with the gear 511 toward one side of the face cover 100, and the lower edge of the upper cover 170 is provided with the rack 150 matching with the gear 511. When the cutter 510 abuts against the fixed knife bar 400, the gear 511 is meshed with the rack 150, and when the sliding block 200 slides, the rack 150 can drive the gear 511 to rotate to drive the cutter 510 to rotate, so that smooth cutting of paper is realized, and the paper is prevented from being cut. A second guide groove 140 is further provided between the rack 150 and the guide rail 130, the second guide groove 140 having an inclined section corresponding to the first guide surface 131 of the guide rail 130, the second guide groove 140 being for avoiding the spindle 513 and the gear 511, and providing a space for the spindle 513 and the gear 511 to rotate.

In some embodiments, the sliding and rotating connection between the elastic block 500 and the sliding block 200 may be achieved by the cooperation of the rotating shaft 210 and the sliding groove 530, where one of the elastic block 500 and the sliding block 200 is provided with the sliding groove 530, and the other is correspondingly provided with the rotating shaft 210 that can slide along the sliding groove 530. Referring to fig. 4 and 6, in the present embodiment, two symmetrical sliding grooves 530 are provided on two sides of the spring block 500, two symmetrical rotating shafts 210 are provided on the slider 200, and the two rotating shafts 210 respectively extend into the sliding grooves 530 on the corresponding sides and can slide along the sliding grooves 530 and rotate in the sliding grooves 530. The elastic member 600 is a tension spring, and two ends of the tension spring are respectively hung on two upright posts on the sliding block 200 and the elastic block 500. Specifically, referring to fig. 9, the tension spring is farther from the face cover 100 than the rotation shaft 210, one end of the tension spring, which is closer to the rack 150, is fastened to the slider 200, and one end of the tension spring, which is farther from the rack 150, is fastened to the spring block 500. Because the tension spring is not coplanar with the axis of the rotating shaft 210, under the action of tension force of the tension spring and the action force between the rotating shaft 210 and the sliding groove 530, the elastic block 500 always receives component forces in the direction Z2 and the direction X1, so that the elastic block 500 slides towards the paper outlet 110 and turns towards the fixed blade 400, when the elastic block 500 is located in the middle, the tension force of the tension spring can enable the cutter 510 to be abutted against the fixed blade 400, and when the elastic block 500 is located at two ends, the elastic block 500 is limited by the second guide surface 132, one end, close to the rack 150, of the elastic block 500 is lifted upwards, so that the cutter 510 is separated from the fixed blade 400 and limited by the first guide surface 131, and the cutter 510 is also far away from the paper outlet 110, namely, is retracted.

Referring to fig. 4, in order to limit and guide the turning action of the elastic block 500, a rotation limiting rib 540 is disposed between two sliding grooves 530, one end of the rotation limiting rib 540 facing away from the direction of the cutter 510 is provided with an arc surface curved facing away from the direction of the slider 200, and the arc surface of the rotation limiting rib 540 abuts against the outer surface of the slider 200 to limit the turning angle of the elastic block 500 under the action of the second guiding surface 132. The sliding block 200 is provided with a sliding limit boss 220, the sliding limit boss 220 is arranged between the two rotating shafts 210, a sliding guide groove matched with the sliding limit boss 220 is formed between the two rotating limit ribs 540, the sliding limit boss 220 can slide along the sliding guide groove, and sliding guide of the elastic block 500 relative to the sliding block 200 is realized.

Referring to fig. 3 and 5, the limiting structure 520 includes a first limiting bead 521, a second limiting bead 522, and a third limiting bead 523, the first limiting bead 521 and the second limiting bead 522 form a limiting slit through which the guide rail 130 passes, and the third limiting bead 523 is disposed in the limiting slit. When the slider 200 slides along the first guide groove 120, the limit slit slides along the guide rail 130. In this embodiment, the first spacing bead 521 and the second spacing bead 522 are both U-shaped, and the protruding portions of the first spacing bead 521 and the second spacing bead 522 are disposed opposite to each other to form a spacing slit. Under the action of tension of the tension spring, the guide rail 130 is always propped against the convex part of the second limit convex edge 522 in the X1-X2 direction, and the guide rail 130 is always propped against the third limit convex edge 523 in the Z1-Z2 direction. When the sliding block 200 moves from the middle part to the two ends and moves to the first guide surface 131, the guide rail 130 gradually moves away from the paper outlet 110 in the X1-X2 direction, the second limit convex edge 522 slides along the guide rail 130 and also moves away from the paper outlet 110, and the elastic block 500 is driven to move away from the paper outlet 110 against the tension of the tension spring, so that the cutter 510 is retracted; meanwhile, the guide rail 130 is gradually far away from the face cover 100 in the Z1-Z2 direction, the third limit protruding edge 523 moves along the upper edge of the guide rail 130 in the Z1-Z2 direction, and under the limitation of the rotating shaft 210 and the sliding groove 530, the guide rail overcomes the tension force of the tension spring and deflects towards the direction far away from the fixed knife strip 400, so that the separation of the cutter 510 and the fixed knife strip 400 is realized.

Referring to fig. 9 and 10, the portable printing apparatus according to the embodiment of the present invention includes the above-mentioned rotary cutter structure, and further includes a print head assembly 700 for printing contents on a paper sheet to realize a developing, and after the print head assembly 700 prints, the paper sheet is fed out from the paper outlet 110 by a distance through a printing rubber roller 710. At this time, the pulling block 300 is manually pulled from one end of the first guide slot 120 to the other end, so that the paper at the paper outlet 110 can be cut, and printing of materials with standard specifications such as non-A4 can be realized. The cutter 510 rotates without slipping during cutting, and the fixed blade 400 forms a V-shaped cut, so that smooth cutting of paper can be performed. And after finishing cutting, the cutter blade is retracted outside the paper outlet 110 and separated from the fixed knife strip 400, so that the cutter blade 510 is prevented from hurting people, and the normal paper outlet of the paper outlet 110 is not influenced. The rotation of the cutter 510 is realized by the cooperation of the gear 511 and the rack 150, so that the installation space occupation is small, and the portable desktop printing device is suitable for portable desktop printing equipment.

It should be noted that, in the description of the present invention, if an azimuth or positional relationship is referred to, for example, upper, lower, front, rear, left, right, etc., the azimuth or positional relationship is based on the azimuth or positional relationship shown in the drawings, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the referred device or element must have a specific azimuth, be configured or operated in a specific azimuth, and should not be construed as limiting the present invention.

In the description of the present invention, a plurality means one or more, and a plurality means two or more, and it is understood that greater than, less than, exceeding, etc. does not include the present number, and it is understood that greater than, less than, within, etc. include the present number. If any, first or second, etc. are described for the purpose of distinguishing between technical features only and not for the purpose of indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.

Claims

1. A rotary cutter structure, comprising:

the surface cover (100) is provided with a paper outlet (110) and a first guide groove (120), and the first guide groove (120) is positioned at one side of the paper outlet (110);

a slider (200) slidably provided on the inner side of the cover (100) and reciprocally slidable along the first guide groove (120);

a shifting block (300) arranged on the outer side of the face cover (100), wherein the shifting block (300) passes through the first guide groove (120) and is connected with the sliding block (200);

a fixed knife strip (400) which is arranged in the surface cover (100) and is close to the paper outlet (110);

a guide rail (130) disposed inside the cover (100) and located between the first guide groove (120) and the paper outlet (110), both ends of the guide rail (130) having a first guide surface (131) and a second guide surface (132), the first guide surface (131) being inclined toward an end of the guide rail (130) and toward a direction away from the paper outlet (110), the second guide surface (132) being located on a side of the guide rail (130) away from the cover (100), and the second guide surface (132) being inclined toward both ends of the guide rail (130) and toward a direction away from the cover (100); and

the elastic block (500) can be connected with the guide rail (130) in a sliding manner through the limiting structure (520), the elastic block (500) can be connected with the sliding block (200) in a sliding manner and can rotate, one end, close to the fixed knife strip (400), of the elastic block (500) is rotatably provided with a cutter (510), an elastic piece (600) is arranged between the elastic block (500) and the sliding block (200), and the elastic piece (600) can apply a pulling force to the elastic block (500) towards the paper outlet (110);

a gear (511) is arranged on a spindle (513) of the cutter (510), a rack (150) matched with the gear (511) is arranged on one side, close to the sliding block (200), of the paper outlet (110), and when the sliding block (200) slides along the first guide groove (120), the gear (511) can be in meshed connection with the rack (150) so that the cutter (510) can rotate under the cooperation of the gear (511) and the rack (150);

when the sliding block (200) moves to the two ends of the first guide groove (120), the elastic block (500) moves away from the paper outlet (110) under the guidance of the first guide surface (131) and turns over in the direction away from the fixed knife strip (400) under the guidance of the second guide surface (132).

2. The rotary cutter structure according to claim 1, wherein one of the bullet block (500) and the slider (200) is provided with a chute (530), the other of the bullet block (500) and the slider (200) is provided with a rotation shaft (210) corresponding to the chute (530), the rotation shaft (210) extends into the chute (530) and can slide along the chute (530), and the bullet block (500) is connected with the slider (200) in a sliding and rotating manner by the cooperation of the rotation shaft (210) and the chute (530).

3. The rotary cutter structure according to claim 2, wherein two sliding grooves (530) are provided on the elastic block (500), the two sliding grooves (530) are symmetrically provided on both sides of the elastic block (500), and two rotating shafts (210) are symmetrically provided on the sliding block (200) corresponding to the positions of the sliding grooves (530).

4. A rotary cutter structure according to claim 3, characterized in that a rotation limiting rib (540) is provided between two of the sliding grooves (530), one end of the rotation limiting rib (540) facing away from the cutter (510) is provided with an arc surface, and the arc surface is curved in a direction away from the slider (200).

5. The rotary cutter structure according to claim 2, wherein the elastic member (600) is a tension spring which is further away from the face cover (100) than the rotary shaft (210).

6. The rotary cutter structure according to claim 1, wherein a second guide groove (140) is provided between the guide rail (130) and the paper outlet (110), and both ends of the second guide groove (140) are provided with inclined sections corresponding to the first guide surface (131).

7. The rotary cutter structure according to claim 1, wherein the limiting structure (520) comprises a first limiting bead (521), a second limiting bead (522), and a third limiting bead (523), a limiting slit is formed between the first limiting bead (521) and the second limiting bead (522), the third limiting bead (523) is disposed in the limiting slit, and the guide rail (130) passes through the limiting slit.

8. The rotary cutter structure according to claim 7, wherein the first limiting bead (521) and the second limiting bead (522) are both U-shaped, and the U-shaped protrusions of the first limiting bead (521) and the second limiting bead (522) are oppositely arranged to form the limiting slit.

9. A portable printing device comprising a rotary cutter structure according to any one of claims 1 to 8.