A cutter structure for a printer core

Abstract

The present invention provides a cutter structure for a printer core, which relates to the technical field of printing devices and includes: a movable cutter and a fixed cutter; the movable cutter and the fixed cutter are arranged overlapping up and down with each other, the movable cutter is slidably arranged and can be straddled on the surface of the fixed cutter, and cooperates with the fixed cutter to cut the recording paper; it further includes a tool holder for assembling the fixed cutter; the fixed cutter is an integral tool, and the fixed cutter is horizontally arranged elastically on the tool holder through a pressing mechanism; the fixed cutter can swing integrally relative to the tool holder, and the fixed cutter is triggered by the movable cutter to swing adaptively, correspondingly swinging the fixed cutter to be flush with the movable cutter. During the cutting process, the fixed cutter and the movable cutter are always in a tightly matched state, so that the blade body of the fixed cutter can swing and adjust adaptively by receiving the acting force of the pressing mechanism, and the two cutters that are misaligned with each other are adjusted so that the fixed cutter swings slightly to be parallel to the movable cutter, realizing smooth cutting and making it easier to completely cut the recording paper.

Description

Technical Field

[0001] The present invention relates to the technical field of printing devices, and more particularly to a cutter structure for a printer core. Background Art

[0002] At present, printers are widely used in the printing of various labels, receipts, bills, etc. There are two common paper cutting states: full paper cutting and half paper cutting. Full paper cutting means cutting the paper completely; half paper cutting means leaving a small section in the middle of the paper uncut. Traditional automatic paper cutting knife structures for micro printers have various structures, but there are problems such as unsmooth cutting and affecting the use performance.

[0003] For the two common paper cutting methods currently in use, there are mainly two paper cutting structures on the market: the moving knife (fixed knife) is integrated, or the moving knife (fixed knife) is composed of two symmetrically arranged blades. The integrated cutter has the advantages of simple structure and low cost; the two symmetrically arranged cutters have the characteristic of more stable cutting.

[0004] However, for the integrated cutter, during the cutting process, it is necessary to ensure good contact between the left and right contact points of the moving and fixed knives without mutual interference, which requires relatively strict requirements for the structure of the cutter and the precision of production and manufacturing. Once the cutter becomes dull or the manufacturing error is large, the force conditions at the left and right contact points will inevitably be inconsistent, and even an incomplete cutting phenomenon may occur where the paper is cut on one side and directly slides past on the other side. For the multi-piece independent cutter, since the two blades of each cutter are independent of each other and do not interfere with each other, the situation of only cutting one side will not occur. However, changing the original single cutter to two blades increases the structural complexity and the production and manufacturing cost. At the same time, there will be a gap between the two symmetrically arranged blades, and this gap will cause a small section in the middle of the paper to change from being cut to being torn, which will lead to unstable cutting when complete cutting is required and the problem of incomplete cutting cannot be eliminated. Summary of the Invention

[0005] The present invention discloses a cutter structure for a printer core, aiming to improve the problems of uneven force on the existing integrated cutter and complex structure and incomplete cutting of the multi-piece independent cutter.

[0006] The present invention adopts the following scheme:

[0007] The present application provides a cutter structure for a printer core, including: a movable cutter and a fixed cutter; the movable cutter and the fixed cutter are arranged overlapping each other vertically, the movable cutter is slidably arranged and can be straddled on the surface of the fixed cutter, and cooperates with the fixed cutter to cut the recording paper; it also includes a tool holder for assembling the fixed cutter; the fixed cutter is an integral tool, and the fixed cutter is horizontally arranged elastically on the tool holder through a pressing mechanism; the fixed cutter can swing integrally relative to the tool holder, and the fixed cutter is triggered by the movable cutter to swing adaptively, corresponding to swing the fixed cutter to be flush with the movable cutter, and the fixed cutter and the movable cutter are always in a tightly matched state during the cutting process.

[0008] As a further improvement, the pressing mechanism includes elastic members arranged on the tool holder, and a plurality of the elastic members are arranged at intervals in the length direction of the fixed cutter between the tool holder and the fixed cutter to provide an elastic pressure for the fixed cutter to approach the movable cutter.

[0009] As a further improvement, a convex portion is provided on the fixed cutter extending along the side away from its cutting edge, and the tool holder is correspondingly provided with a receiving groove adapted to the convex portion; at least a part of the convex portion is placed in the receiving groove, and the fixed cutter can rotate relative to the receiving groove through the convex portion to swing integrally.

[0010] As a further improvement, the convex portion and the receiving groove are engaged in a point contact manner; both sides of the receiving groove in the length direction of the fixed cutter are engaged and abutted against the convex portion, and the fixed cutter can swing integrally back and forth around the abutting portion.

[0011] As a further improvement, hemispherical clamping portions are provided on both sides of the receiving groove close to the convex portion, the two clamping portions are arranged opposite to each other and protrude along the groove wall of the receiving groove; a clamping space for accommodating the fixed cutter with a gradually changing width is formed between the clamping portions.

[0012] As a further improvement, the convex portion is generally arranged at the middle position of the fixed cutter, and reference portions are provided at the opposite ends of the fixed cutter extending, the reference portions are generally flush with the convex portion, and the tool holder is correspondingly provided with reference grooves capable of accommodating the reference portions, and the reference grooves are generally parallel to the reference portions.

[0013] As a further improvement, the fixed cutter is in an arc structure, and the arc structure protrudes in the middle and is arranged higher than both sides in the length direction of the fixed cutter.

[0014] As a further improvement, the fixed knife is in the shape of a thin sheet. When the fixed knife is installed on the tool holder, the pressing mechanism applies force to the fixed knife, so that when the fixed knife is separated from the movable knife, the fixed knife is in an arc state, and the arc state is convex in the middle and concave on both sides along the length direction of the fixed knife.

[0015] As a further improvement, the two sides of the fixed knife along the swing reference axis are close to the movable knife, and when the movable knife slides towards the fixed knife, the fixed knife is triggered to swing as a whole, so as to balance the pressure at both ends when the fixed knife and the movable knife cut.

[0016] As a further improvement, a notch is provided in the middle of the cutting edge of the movable knife facing the fixed knife, and the notch is arranged approximately collinear with the swing reference axis of the fixed knife.

[0017] By adopting the above technical solutions, the following technical effects can be achieved by the present invention:

[0018] For the cutter structure of the printer core of the present application, a fixed knife with an integrated tool structure is adopted, which avoids the problems of complex structure and incomplete cutting of the existing multi-piece independent cutter structure. Among them, the fixed knife is elastically arranged on the tool holder via a pressing mechanism, and the fixed knife can swing as a whole relative to the tool holder. When the movable knife overlaps and straddles towards the fixed knife, the movable knife triggers the fixed knife to swing adaptively, and the fixed knife swings to be flush with the movable knife, ensuring that the two cutters are always in a tightly matched state during the cutting process. The close cooperation between the cutters is conducive to the effective cutting of the recording paper. Moreover, the movable knife moves close to the fixed knife along the sliding direction to cooperate with each other for cutting. When the two cutters are misaligned, the movable knife can contact the surface of the fixed knife to trigger the fixed knife to swing relatively adaptively, correspondingly causing the fixed knife to swing back and forth along its swing reference axis. Under the elastic pressing cooperation of the pressing mechanism, the force on the fixed knife on the tool holder is adjusted, so that the blade body of the fixed knife can swing back and forth adaptively by receiving the force of the pressing mechanism, adjusting the two misaligned cutters so that the fixed knife swings slightly to be parallel to the movable knife, ensuring that the overall force on the fixed knife is balanced, realizing stable cutting and making it easier to completely cut off the recording paper. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of the cutter structure of the embodiment of the present invention;

[0021] Figure 2 It is a partial disassembly schematic diagram of the fixed knife and the tool holder of the cutting knife structure according to an embodiment of the present invention;

[0022] Figure 3 It is Figure 1 A structural schematic diagram from another perspective;

[0023] Figure 4 It is a structural schematic diagram of the movable knife and the fixed knife of the cutting knife structure according to an embodiment of the present invention, wherein the two cutting edges are in a non-overlapping and straddling state.

[0024] Icons: 1 - movable knife; 11 - notch; 12 - guiding part; 2 - fixed knife; 21 - protruding part; 22 - reference part; 3 - tool holder; 31 - accommodating groove; 311 - clamping part; 32 - reference groove; 4 - pressing mechanism; 5 - printing body; 51 - machine cover; 511 - fastening mechanism; 5111 - reset hook part; 52 - fuselage; 521 - driving mechanism; 522 - mating shaft part; 53 - hinge shaft. Detailed implementation manners

[0025] To make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0027] In the present invention, unless otherwise clearly defined or limited, terms such as "install", "connect", "join", "fix", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present invention, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0029] Embodiment

[0030] Combined with Figures 1 to 4 , this embodiment provides a cutter structure for a printer core, including: a movable cutter 1 and a fixed cutter 2.

[0031] In this embodiment, the movable cutter 1 and the fixed cutter 2 are arranged overlapping each other vertically. The movable cutter 1 is slidably arranged and can straddle on the surface of the fixed cutter 2, and cooperates with the fixed cutter 2 to cut the recording paper. Wherein, the cutter structure further includes a tool holder 3 for assembling the fixed cutter 2. The fixed cutter 2 is an integral tool, and the fixed cutter 2 is horizontally and elastically arranged on the tool holder 3 through a pressing mechanism 4. The fixed cutter 2 can swing integrally relative to the tool holder 3, and is triggered by the movable cutter 1 to swing adaptively, corresponding to swing the fixed cutter 2 to be flush with the movable cutter 1, and the fixed cutter 2 and the movable cutter 1 are always in a tightly matched state during the cutting process.

[0032] In this embodiment, the fixed cutter 2 with an integrated cutter structure is adopted, which avoids the problems of the existing multi-piece independent cutter structure being complex and the cutting being incomplete. Among them, the fixed cutter 2 is elastically arranged on the cutter holder 3 via the pressing mechanism 4, and the fixed cutter 2 can swing integrally relative to the cutter holder 3. When the movable cutter 1 overlaps and straddles the fixed cutter 2, the movable cutter 1 triggers the adaptive swing of the fixed cutter 2, and the fixed cutter 2 swings to be flush with the movable cutter 1, ensuring that the two cutters are always in a tightly matched state during the cutting process. The close cooperation between the cutters is conducive to the effective cutting of the recording paper. Moreover, when the movable cutter 1 moves close to the fixed cutter 2 along the sliding direction for mutual cooperation in cutting, the movable cutter 1 can contact the surface of the fixed cutter 2 when the two cutters are misaligned, so as to trigger the relative adaptive swing of the fixed cutter 2, correspondingly causing the fixed cutter 2 to swing back and forth along its swing reference axis, adjusting the force of the fixed cutter on the cutter holder 3 under the elastic pressing cooperation of the pressing mechanism 4, and enabling the blade body of the fixed cutter 2 to swing adaptively back and forth by receiving the acting force of the pressing mechanism 4, adjusting the two misaligned cutters so that the fixed cutter 2 swings and fine-tunes to be parallel to the movable cutter 1, ensuring the overall balanced force of the fixed cutter and achieving stable cutting and making it easier to completely cut off the recording paper.

[0033] It should be mentioned that the integral swing of the fixed cutter 2 relative to the cutter holder 3 is realized according to the swing reference axis of the fixed cutter 2 on the cutter holder 3. The fixed cutter 2 swings relatively back and forth around the swing reference axis, and the two ends of the cutter on both sides of the reference axis swing synchronously, one before and the other after, so that the fixed cutter 2 swings integrally relative to the cutter holder 3, thereby adaptively adjusting the cutting angle of the fixed cutter 2 to fit the movable cutter 1 to complete the cutting of the recording paper.

[0034] In this embodiment, the pressing mechanism includes elastic members arranged on the cutter holder 3, and a plurality of elastic members are arranged at intervals along the length direction of the fixed cutter 2 between the cutter holder 3 and the fixed cutter 2 to provide a spring force for the fixed cutter 2 to approach the movable cutter 1. Preferably, the elastic members are relatively evenly spaced from each other, so that elastic members are elastically arranged at both ends of the cutter on both sides of the swing reference axis, correspondingly adjusting the elastic pressure when the fixed cutter 2 swings integrally. Among them, the elastic member is preferably a compression spring.

[0035] In one embodiment of the present invention, a protrusion 21 is provided on the fixed knife 2 extending along the side away from its cutting edge. The tool holder 3 is correspondingly provided with a receiving groove 31 adapted to the protrusion 21. At least a part of the protrusion 21 is placed in the receiving groove 31, and the fixed knife 2 can rotate relative to the receiving groove 31 via the protrusion 21 to swing as a whole. Among them, the protrusion 21 and the receiving groove 31 are engaged in a point contact manner, and both sides of the receiving groove 31 along the length direction of the fixed knife 2 are engaged and abutted against the protrusion 21, and the fixed knife 2 can swing back and forth as a whole around the abutting position. The fixed knife 2 can swing back and forth relative to the abutting point between the protrusion 21 and the receiving groove 31, and the vertical straight line position perpendicular to the fixed knife 2 where the abutting point is located is the swing reference axis of the fixed knife 2 on the tool holder 3. Preferably, the protrusion 21 is in the shape of a sheet and is smoothly butted against the blade body of the fixed knife 2. Hemispherical clamping parts 311 are provided on both sides of the receiving groove 31 close to the protrusion 21, and the protrusion 21 is in point contact engagement with the two clamping parts 311. By clamping and fixing the two clamping parts 311 relative to the protrusion 21 of the fixed knife 2 back and forth, the fixed knife 2 can swing back and forth around the hemispherical clamping parts 311 to reach a point contact clamping state.

[0036] Among them, hemispherical clamping parts 311 are provided on both sides of the receiving groove 31 close to the said protrusion 21. The two clamping parts 311 are arranged opposite to each other and protrude along the groove wall of the receiving groove 31. A clamping space for accommodating the fixed knife 2 with a gradually changing width is formed between the two clamping parts 311 arranged opposite to each other. The fixed knife 2 is clamped and placed in this space, abutted against the outer side wall of the clamping part 311, and the abutting position therebetween moves along the outer side wall of the clamping part 311 relative to the swinging direction, and the swing reference axis of the fixed knife 2 relative to the tool holder 3 remains unchanged. Preferably, the protrusion 21 is generally provided at the middle position of the fixed knife 2, and reference parts 22 are provided at the opposite ends of the fixed knife 2 extending. The reference parts 22 are generally flush with the protrusion 21, and the tool holder 3 is correspondingly provided with reference grooves 32 capable of accommodating the reference parts 22, and the reference grooves 32 are generally parallel to the reference parts 22. When the fixed knife 2 is placed horizontally relative to the tool holder 3, its reference parts 22 are parallel to the reference grooves 32 on the tool holder 3, and whether the fixed knife 2 swings is determined by their mutual parallelism. When the movable knife 1 is misaligned with the fixed knife 2, the movable knife 1 straddles the surface of the fixed knife 2. At this time, the reference parts 22 on the fixed knife 2 are offset and swing relative to the reference grooves 32, and the fixed knife 2 swings as a whole to adaptively cooperate with the movable knife 1 to achieve cutting, thereby avoiding problems such as unstable cutting and inability to cut due to misalignment between the two cutting edges. And the user can intuitively obtain that there is misalignment between the two cutting edges, which is convenient for adjusting and maintaining the two cutting edges.

[0037] Please refer to Figure 1 and Figure 4, a notch 11 is formed in the middle of the cutting edge of the movable knife 1 facing the fixed knife 2, and the notch 11 is arranged substantially collinear with the swing reference axis of the fixed knife 2. Specifically, the movable knife 1 is generally concave in a V shape from its two ends to the center, and the notch 11 is formed at the concave portion and is recessed inward along the cutting edge. The notch 11 is collinear with the swing reference axis of the fixed knife 2, further ensuring smoother cutting when the two cutting edges overlap. Moreover, in order to enable the movable knife 1 that moves up and down close to the fixed knife 2 to better cross and overlap with the surface of the fixed knife 2 for cutting, the two ends of the movable knife are provided with relatively inclined guiding portions 12, and the guiding portions 12 are inclined towards the surface away from the fixed knife 1, so that when the two cutting edges approach, the movable knife is smoothly placed on the surface of the fixed knife 2 along the guiding portions 12, and at the same time, it is ensured that the movable knife 1 can smoothly trigger the swing adjustment of the fixed knife 2.

[0038] In this embodiment, specifically, the fixed knife 2 has an arc-shaped structure, and the arc-shaped structure protrudes in the middle from both sides along the length direction of the fixed knife 2, so that the movable knife 1 can more easily abut against one side of the arc-shaped fixed knife 2 through its guiding portion 12 to trigger the swing of the fixed knife 2. And the fixed knife 2 has an arc-shaped structure with elastic recovery. When the two cutting knives overlap for cutting cooperation, the arc-shaped fixed knife 2 returns to a state flush with the movable knife 1 to achieve a tightly matched cutting method.

[0039] Preferably, the fixed knife 2 is in the shape of a thin sheet. When the fixed knife 2 is installed on the tool holder 3, the pressing mechanism 4 applies force to the fixed knife 2, so that when the fixed knife 2 is separated from the movable knife 1, the fixed knife 2 is in an arc shape, and the arc shape protrudes in the middle from both sides along the length direction of the fixed knife 2. The pressing mechanism 4 is elastically pressed on the blade body of the fixed knife 2 and is located on both sides of its swing reference axis respectively, so that the fixed knife 2 arranged on the tool holder 3 is generally arched in an arc shape. Specifically, the elastic members of the pressing mechanism 4 respectively abut against the left and right sides close to the convex portion 21 of the fixed knife 2. Under the abutting support of the elastic members, the thin-sheet-shaped fixed knife 2 squeezes and drives the left and right sides of the fixed knife 2 to bend and deform relatively, so that the fixed knife 2 arches slightly towards the movable knife 1 along the axis where the convex portion 21 is located to form a symmetrical arc shape.

[0040] Among them, the fixed knife 2 is close to the movable knife 1 on both sides along the swing reference axis. When the movable knife 1 slides in the direction of the fixed knife 2, it correspondingly triggers the fixed knife 2 to swing as a whole, so as to balance the pressures at both ends when the fixed knife 2 and the movable knife 1 perform cutting. The movable knife 1 slides so as to be able to abut against one side of the fixed knife 2, correspondingly triggering the fixed knife 2 to swing as a whole. The fixed knife 2 with an arc-shaped structure cooperates with the movable knife 1 straddling its surface. When the cutting edge of the movable knife 1 gradually contacts the arc-shaped arched fixed knife 2, the recording paper is correspondingly cut, ensuring that it is easier to completely cut off the recording paper. Moreover, both sides of the fixed knife 2 are bent and deformed towards the knife body close to the movable knife 1, so that when the two cutting knives are misaligned, the movable knife 1 can contact one side of the fixed knife 2 through the guiding parts 12 correspondingly arranged on both sides of it, so as to smoothly trigger the fixed knife 2 to swing as a whole and always be tightly matched with the movable knife 1.

[0041] The above is only the preferred implementation manner of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention.

Claims

1. A cutter structure for a printer core, comprising: A movable knife (1) and a fixed knife (2); the movable knife (1) and the fixed knife (2) are arranged overlapping each other vertically, the movable knife (1) is slidably arranged and can be straddled on the surface of the fixed knife (2), and cooperates with the fixed knife (2) to cut the recording paper; characterized in that, It further includes a tool holder (3) for assembling the fixed knife (2); the fixed knife (2) is an integral tool, and the fixed knife (2) is horizontally arranged elastically on the tool holder (3) through a pressing mechanism (4); the fixed knife (2) can swing integrally relative to the tool holder (3), and the fixed knife (2) is triggered by the movable knife (1) to swing adaptively, correspondingly making the fixed knife (2) swing to be flush with the movable knife (1), and the fixed knife (2) and the movable knife (1) are always in a tightly matched state during the cutting process; A convex portion (21) is provided on the fixed knife (2) extending along the side away from its cutting edge; the tool holder (3) is correspondingly provided with a receiving groove (31) adapted to the convex portion (21); at least a part of the convex portion (21) is placed in the receiving groove (31), and the fixed knife (2) can rotate relative to the receiving groove (31) through the convex portion (21) to swing integrally; The receiving groove (31) is provided with clamping portions (311) along both sides close to the convex portion (21), the two clamping portions (311) are arranged opposite to each other and protrude along the groove wall of the receiving groove (31); a clamping space for accommodating the fixed knife (2) with a gradually changing width is formed between the clamping portions (311).

2. The cutter structure according to claim 1, wherein, The pressing mechanism (4) includes elastic members arranged on the tool holder (3), and a plurality of the elastic members are arranged at intervals along the length direction of the fixed knife (2) between the tool holder (3) and the fixed knife (2) to provide an elastic pressure for the fixed knife (2) to approach the movable knife (1).

3. The cutter structure according to claim 1, wherein The convex portion (21) and the receiving groove (31) are engaged in a point contact manner; both sides of the receiving groove (31) along the length direction of the fixed knife (2) are engaged and abutted against the convex portion (21), and the fixed knife (2) can swing integrally back and forth around the abutting position.

4. The cutter structure according to claim 3, wherein The clamping portion (311) is hemispherical.

5. The cutter structure according to claim 3, wherein The convex portion (21) is approximately arranged at the middle position of the fixed knife (2), and reference portions (22) are provided at the opposite ends of the fixed knife (2) extending; the reference portions (22) are approximately flush with the convex portion (21), and the tool holder (3) is correspondingly provided with reference grooves (32) capable of accommodating the reference portions (22), and the reference grooves (32) are approximately parallel to the reference portions (22).

6. The cutter structure according to claim 1, wherein The fixed knife (2) is of an arc structure, and this arc structure protrudes in the middle and is recessed on both sides along the length direction of the fixed knife (2).

7. The cutter structure of a printer core according to claim 1, characterized in that: The fixed knife (2) is in the shape of a thin sheet. When the fixed knife (2) is installed on the tool holder (3), the pressing mechanism (4) applies a force to the fixed knife (2) so that when the fixed knife (2) is separated from the movable knife (1), the fixed knife (2) is in an arc state, and the middle of the arc state protrudes from both sides along the length direction of the fixed knife (2).

8. The cutter structure according to claim 7, characterized in that The fixed knife (2) approaches the movable knife (1) on both sides along the swing reference axis. When the movable knife (1) slides in the direction of the fixed knife (2), it correspondingly triggers the fixed knife (2) to swing as a whole to balance the pressure at both ends when the fixed knife (2) and the movable knife (1) perform cutting.

9. The cutter structure according to claim 1, wherein A notch (11) is formed in the middle of the cutting edge on the side of the movable knife (1) facing the fixed knife (2), and the notch (11) is arranged substantially collinear with the swing reference axis of the fixed knife (2).

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