CN217294026U - Paper cutting mechanism and label printer - Google Patents

Abstract

The utility model relates to a paper cutting mechanism and have this paper cutting mechanism's label printer, paper cutting mechanism is used for cutting off the paper of label printer exit slot, paper cutting mechanism includes the application of force subassembly and the cut paper subassembly of mutually combined, and the application of force subassembly is used for receiving the effort and drives the motion of cut paper subassembly, and the cut paper subassembly includes the cutter unit spare of mutually combined and presses the paper subassembly, and wherein, the cutter unit spare is supported by the application of force subassembly, presses the fore-and-aft direction of paper subassembly and all by the restriction of cutter unit spare about with, therefore, cutter unit spare can mutually combine with pressing the paper subassembly to be installed as an integer in the equipment step afterwards, thereby reduce the equipment degree of difficulty of the label printer that has this paper cutting mechanism.

Description

Paper cutting mechanism and label printer

Technical Field

The utility model relates to a label printer and be located paper cutting mechanism of this label printer.

Background

Label printers are widely used in the fields of warehouse logistics, cash register, etc., and generally form images or characters on thermal paper in a thermal manner, and then the imaged paper is taken out. The existing paper cutting modes are divided into an electric mode and a manual mode, and considering that a complex structure of the electric paper cutting mode occupies a large space, the cost of an electric paper cutting mechanism can greatly rise correspondingly.

The conventional paper cutting mechanism generally includes a cutter assembly and a platen assembly coupled to each other, and the platen assembly is movable together with the cutter assembly, but since the cutter assembly and the platen assembly do not have a constraint relationship with each other, the difficulty in assembling the paper cutting mechanism and the portable label printer having the paper cutting mechanism may increase.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a paper cutting mechanism, in which a cutter assembly and a paper pressing assembly can be combined with each other and installed as a whole in a subsequent assembling step, thereby reducing the assembling difficulty of a label printer having the paper cutting mechanism.

In order to achieve the purpose, the utility model adopts the following technical scheme:

paper cutting mechanism for cut off the paper of label printer exit slot, paper cutting mechanism includes the application of force subassembly and the cut paper subassembly of inter combination, and the application of force subassembly is used for receiving the effort and drives the motion of cut paper subassembly, and the cut paper subassembly includes the cutter unit spare of inter combination and presses the paper subassembly, and wherein, the cutter unit spare is supported by the application of force subassembly, presses the fore-and-aft direction of paper subassembly and all is restricted by the cutter unit spare with left right direction.

The paper pressing assembly is arranged to move in the up-and-down direction relative to the cutter assembly.

When the force application assembly applies upward acting force, the cutter assembly and the paper pressing assembly move upward for a first distance together, the paper pressing assembly keeps static, and the cutter assembly continues to move upward for a second distance.

The paper cutting mechanism further comprises an elastic piece arranged between the cutter component and the paper pressing component.

The cutter assembly comprises a cutter frame and a blade, the blade is fixedly arranged on the cutter frame, and the highest point of the blade does not exceed the uppermost part of the paper pressing assembly along the vertical direction.

The paper cutting mechanism further comprises a support, and the cutter assembly is further supported by the support; the support is still including setting up the limiting plate wherein, and the fore-and-aft direction and the left and right sides direction of cutter subassembly all are restricted by the limiting plate.

The utility model provides a label printer, including the casing and as above paper cutting mechanism, be formed with the cavity in the casing, be formed with the breach on the casing, paper cutting mechanism is installed in the casing, and paper cutting mechanism's partly exposes from the breach.

The inner side of the shell is provided with a chute which is distributed along the vertical direction, and the force application component is combined with the chute.

The label printer further comprises a paper bin located in the cavity and a resetting piece combined with the paper cutting mechanism, the resetting piece is further combined with the shell or the paper bin, and the paper cutting mechanism is fixedly installed on the shell or the paper bin.

Drawings

Fig. 1 is a perspective view of a label printer according to an embodiment of the present invention.

Fig. 2 is a perspective view of a label printer according to an embodiment of the present invention after hiding an upper cover assembly.

Fig. 3A is a state diagram of a label printer according to an embodiment of the present invention after partial disassembly.

Fig. 3B is a schematic structural diagram of an inner portion of a right end cover of a label printer according to an embodiment of the present invention.

Fig. 4A and 4B are perspective views of a push block in a paper cutting mechanism according to an embodiment of the present invention.

Fig. 5 is a perspective view of a paper pressing assembly in the paper cutting mechanism according to the first embodiment of the present invention.

Fig. 6A and 6B are perspective views of a cutter holder in a paper cutting mechanism according to an embodiment of the present invention.

Fig. 7 is a perspective view of the paper cutting mechanism according to the first embodiment of the present invention after the cutter assembly and the paper pressing assembly are combined.

Fig. 8 is a cross-sectional view of the paper cutting mechanism according to the first embodiment of the present invention, in which the cutter assembly, the paper pressing assembly, and the holder are combined and cut along a plane passing through the center of the left support column and perpendicular to the left-right direction.

Fig. 9 is a side view of the driving mechanism and the paper bin viewed in the left-right direction after the housing is hidden in the label printer according to the first embodiment of the present invention.

Fig. 10 is a state diagram of a label printer according to an embodiment of the present invention, in which parts of a transmission mechanism are disassembled.

Fig. 11 is a state diagram of a label printer according to a second embodiment of the present invention, in which parts of a transmission mechanism are disassembled.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[ EXAMPLES one ]

Fig. 1 is a perspective view of a label printer according to an embodiment of the present invention; fig. 2 is a perspective view of a label printer according to an embodiment of the present invention after hiding an upper cover assembly.

The label printer 100 comprises a main assembly 10 and a cover assembly 20 which are mutually combined, a paper outlet 21 is positioned between the main assembly 10 and the cover assembly 20, a gripping part 22 is connected with any one of the main assembly 10 or the cover assembly 20, so that a user can conveniently take the label printer, the cover assembly 20 is hinged with the main assembly 10 and can overturn relative to the main assembly 10, a mechanical locking mode and a magnetic locking mode can be adopted between the main assembly 10 and the cover assembly 20, and when the mechanical combination mode is adopted, the cover assembly 20 is also provided with an unlocking device which is operated by the user to release the locking between the main assembly 10 and the cover assembly 20.

For convenience of description, the label printer 100 will first be defined such that in a normal set state of the label printer 100, the height direction of the label printer is the up-down direction, the width direction is the left-right direction, and the direction perpendicular to both the up-down direction and the left-right direction is the front-back direction, which are also perpendicular to each other, the side where the main assembly 10 and the upper cover assembly 20 are hinged to each other is the rear, and the side opposite to the rear is the front.

Fig. 3A is a state diagram of a label printer according to an embodiment of the present invention, with parts broken away; fig. 3B is a schematic structural view of an inner portion of a right end cover of a label printer according to an embodiment of the present invention; fig. 4A and 4B are perspective views of a push block in a paper cutting mechanism according to an embodiment of the present invention.

The main assembly 10 includes a housing 11, and a paper deck 30 and a paper cutting mechanism 50 mounted on the housing 11, at least a part of the paper deck 30 and at least a part of the paper cutting mechanism 50 being located in a cavity 12 defined by the housing 11, preferably, the housing 11 includes a first housing 11a and a second housing 11b combined in the left-right direction, the cavity 12 being located between the first housing 11a and the second housing 11b, the paper required for the label printer to operate is placed in the paper deck 30 in a roll shape, and the paper cutting mechanism 50 is used to cut the paper supplied to the paper outlet 21; the first housing 11a includes a main housing 11a1 extending in the up-down direction and the front-rear direction and an extension housing 11a2 connected to the main housing 11a1, a notch 11a3 is formed at least on the extension housing 11a2, the second housing 11b has substantially the same structure as the first housing 11a and also includes a main housing 11b1 extending in the up-down direction and the front-rear direction and an extension housing 11b2 connected to the main housing 11b1, the notch 11b3 is formed at least on the extension housing 11b2, the notch 11a3 and the notch 11b3 are opposed in the left-right direction when the first housing 11a and the second housing 11b are joined, the paper cutting mechanism 50 is mounted in the cavity 12, and a part of the paper cutting mechanism 50 is exposed from the notches 11a3/11b 3.

The cutting mechanism 50 includes a force application assembly 60 and a cutting assembly 70 coupled to each other, and a user causes the cutting assembly 70 to perform a cutting action by applying a force to the force application assembly 60. A portion of the force applying assembly 60 is exposed through the notch 11a3/11b 3. as shown in the figure, the force applying assembly 60 includes a slide block 61 and a push block 62 which are coupled to each other, and when the push block 62 is pushed upward, the slide block 61 is driven to slide upward, and at the same time, the cutting assembly 70 is also pushed upward to perform a cutting operation.

As shown in fig. 4A and 4B, the slide block 61 includes a main plate 611 having a plate shape and a support portion 612 formed to protrude from the rear surface of the main plate 611, and the cutting assembly 70 may be supported by the support portion 612 so that the cutting assembly 70 may move upward along with the main plate 611; further, the left and right ends of the main plate 611 are gradually bent backward, and the thickness of the left and right ends 613 of the main plate 611 is gradually reduced, so that the main plate 611 is formed substantially in a shape in which the middle of the main plate 611 is thick and the two sides are thin in the left-right direction, and thus, the main plate 611 can be mounted to the inner side of the housing 11 (the side where the cavity 12 is located), the thickness of the housing 11 does not need to be changed, the thickness of the housing in the vicinity of the notch 11a3/11b3 can be kept constant, and the sliding grooves do not need to be formed in the housing in the vicinity of the notch 11a3/11b3 to affect the strength of the housing.

As shown in fig. 3A and 3B, the first housing 11a is provided with at least one protrusion 11c on the inner side (the side where the cavity 12 is located) close to the notch 11a3, a slide groove 11d is formed between the protrusion 11c and the first housing 11a and distributed in the vertical direction, the left/right end 613 of the main plate 611 enters the slide groove 11d, and similarly, the protrusion 11c and the slide groove 11d are provided on the inner side of the second housing 11B, and the right/left end 613 of the main plate 611 enters the slide groove 11 d; it should be noted that the "middle thickness" herein does not mean that the thickness of the middle portion in the left-right direction of the main plate 611 is larger than the thicknesses of both ends, and in general, the sliding of the slide block 61 is not affected even if the thickness of the middle portion in the left-right direction of the main plate 611 is the same as or smaller than the thicknesses of both ends, as long as the thicknesses of both ends in the left-right direction of the main plate 611 are such that both left and right ends of the main plate 611 can be guided by the slide grooves 11 d.

Fig. 5 is a perspective view of a paper pressing assembly in a paper cutting mechanism according to an embodiment of the present invention; fig. 6A and 6B are perspective views of a cutter holder in a paper cutting mechanism according to an embodiment of the present invention; fig. 7 is a perspective view of a combined cutter assembly and a combined paper pressing assembly in a paper cutting mechanism according to an embodiment of the present invention; fig. 8 is a cross-sectional view of the paper cutting mechanism according to the first embodiment of the present invention, in which the cutter assembly, the paper pressing assembly, and the holder are combined and cut along a plane passing through the center of the left support column and perpendicular to the left and right directions.

The paper cutting assembly 70 includes a cutter assembly and a paper pressing assembly 73 that are coupled to each other, the paper pressing assembly 73 can move a first distance with the cutter assembly, then the paper pressing assembly 73 does not move any more, and the cutter assembly continues to move a second distance to complete the paper cutting action. The cutter unit includes a cutter holder 71 and a cutter blade 72 which are coupled to each other, the cutter blade 72 is fixedly mounted on the cutter holder 71, and the platen 730 is coupled to the cutter holder 71, so that the cutter unit and the platen 73 can be integrally formed, and can be pre-assembled and then coupled to other components of the label printer, and the problem of the components in the cutter unit and/or the components in the platen 73 being scattered during the assembly of the paper cutting mechanism 50 can be effectively prevented.

The paper pressing assembly 73 comprises a paper pressing plate 730, a paper pressing block 76 combined with the paper pressing plate, a guiding protrusion 731 connected with the paper pressing plate 730 and a first positioning column 732 combined with the guiding protrusion 731, wherein the paper pressing block 76 can be integrally formed with the paper pressing plate 730 or formed separately, the material of the paper pressing block 76 is not limited here as long as the paper at the paper outlet 21 can be pressed, preferably, the paper pressing block 76 is made of flexible material, so that the phenomenon that a user is suddenly pressed to cause jamming when pushing the force application assembly 60 can be avoided, and the pressure of the paper pressing block 76 on the paper is gradually increased, and the phenomenon that the paper is wrinkled or worn can be avoided.

The blade holder 71 includes a plate-shaped main body 711, a front plate 713 and a bottom plate 712 extending forward and backward from the main body 711, respectively, a stopper groove 719 for restricting the blade 72 is formed between the front plate 713 and the main body 711, the main body 711 is further provided with a support surface 715 for supporting the blade 72, and a second positioning post 714 is formed to protrude upward from the bottom plate 712. Furthermore, the main body 711 is further provided with a mounting hole 717 and a guiding groove 716 which are communicated with each other, the guiding protrusion 731 and the first positioning column 732 on the paper pressing plate 730 enter from the front to the rear of the main body 711 through the mounting hole 717, the guiding protrusion 731 enters the guiding groove 716 again, the size of the second positioning column 714 or the second positioning column 714 is larger than the size of the guiding groove 716 in the left-right direction, finally, the front-back direction and the left-right direction of the paper pressing assembly 73 are limited by the cutter assembly, the paper pressing plate 730 is limited by the guiding groove 716 and can only slide in the up-down direction, the paper pressing plate 730 cannot fall off from the main body 71, and the cutter frame 71 and the paper pressing plate 730/paper pressing assembly 73 are formed into a whole.

Further, the paper cutting mechanism 50 further includes an elastic member 74 provided between the cutter holder 71 and the paper pressing plate 730, the elastic member 74 serving as an example of a force transmission member for transmitting the acting force of the force application member 60 to the paper pressing member 73 so that the paper pressing member 73 moves together with the cutter member; preferably, the elastic member 74 is a compression spring, as shown in fig. 7, one end of which is coupled to the first positioning post 732 and the other end of which is coupled to the second positioning post 714.

As shown in fig. 6A and 6B, the supporting surface 715 is located above the guiding groove 716 in the up-down direction, the dimension of the blade 72 in the up-down direction can be controlled, and further, the bottom plate 712 is located below the mounting hole 717, that is, the mounting hole 717 and the guiding groove 716 are located between the supporting surface 715 and the bottom plate 712, which not only facilitates the increase of the dimension of the mounting hole 717 so that the paper pressing plate 730 can be quickly mounted, but also allows the movement of the paper pressing plate 730 in the up-down direction not to be interfered. When the label printer is assembled, the base plate 712 is supported by the support part 612, and in particular, the front side of the base plate 712 is supported by the support part 612.

As shown in fig. 3A, the paper cutting mechanism 50 further includes a bracket 80, the bracket 80 is fixed in the cavity 12 with the paper bin 30 and/or the housing 11 by means of pin coupling or snap coupling, and the paper cutting assembly 70 is further supported by the bracket 80, specifically, the bracket 80 supports the rear side of the base plate 712, and thus, both the front side and the rear side of the base plate 712 are supported so that the paper cutting mechanism 70 is stably placed. The holder 80 includes a holder body 81, and a support arm 83 and a stopper plate 82 provided on the holder body 81, the base plate 712 is supported by the support arm 83 (as shown in fig. 8), and the blade holder main plate 711 is restricted by the stopper plate 82 to move only in the up-and-down direction, so that the cutting assembly 70 in the cutting mechanism 50 can be positioned to the holder 80, and the cutting assembly 70 can move relative to the holder 80 and perform a cutting action after being pushed upward by the urging assembly 60, and during the upward movement of the cutting assembly 70, the blade holder 71, the blade 72, and the paper pressing assembly 73 move upward together first, and then the paper pressing assembly 73 remains stationary, and the blade holder 71 and the blade 72 continue to move upward relative to the paper pressing assembly 73 until the cutting action is completed.

The blade 72 includes a blade body 721 and a tip 722 at the upper end of the blade body 721, the tip 722 being provided in a tapered shape to cut the sheet more easily; when the paper cutting mechanism 50 is assembled, the tip 722 of the blade 72 is lower than/does not exceed the uppermost position of the paper pressing member 73, that is, the blade 72 is lower than the paper pressing member 73, which not only protects the blade 72 from being broken, but also prevents the blade 72 from contacting the paper before the paper pressing member 73 and causing irregular cutting of the paper. Preferably, the distance between the tip 722 of the blade and the uppermost part of the paper pressing assembly 73 is 0.5mm to 2mm in the up-down direction, and more preferably, the distance is 1mm, so that the blade 72 can cut after the paper pressing assembly 73 completes the paper pressing action, the distance that the blade needs to move upwards is reduced while the paper cutting action is kept continuous, and correspondingly, the distance that the user pushes the force application assembly 60 to move is also shortened.

The paper cutting process of the paper cutting mechanism 50:

the user pushes the push block 62 to make the slide block 61 slide upwards along the sliding slot 11d, at the same time, the slide block 61 drives the knife rest 71 to slide upwards along the limit plate 82 of the bracket 80, the paper pressing plate 730 is pushed upwards through the elastic piece 74, the press block 76 gradually presses the paper and keeps still, at the same time, the blade 72 continues to move upwards along with the knife rest 71, the elastic piece 74 is elastically deformed, the tip 722 of the blade punctures the middle part of the paper and gradually spreads towards the two sides until the paper is completely cut off, and the blade 72 then enters the accommodating cavity (not shown) of the upper cover component corresponding to the blade.

As shown in fig. 3A, the paper cutting mechanism 50 further includes a reset piece 75 combined with the cutter holder 71 or the paper pressing plate 730, and the reset piece 75 is also combined with the housing 11. During the upward movement of the push block 62, the reset member 75 is elastically deformed, and when the user no longer applies a pushing force to the push block 62, the components of the paper cutting mechanism 50 are reset by the elastic reset force of the reset member 75. Preferably, the elastic member 74, the first positioning column 732, the second positioning column 714 and the supporting arm 83 are disposed at two positions spaced apart in the left-right direction, so that the movement of the paper cutting mechanism 50 is more stable.

The label printer 100 conveys the paper in the paper bin 30 to the paper output port 21 by the paper feeding roller 13, the paper feeding roller 13 is positioned on the paper feeding path of the paper and is rotatably installed, and thus, the label printer 100 further comprises a transmission mechanism 40 for driving the rotation of the paper feeding roller 13.

Fig. 9 is a side view of the driving mechanism and the paper bin viewed in the left-right direction after the housing is hidden in the label printer according to the first embodiment of the present invention; fig. 10 is a state diagram of a partial exploded view of a transmission mechanism in a label printer according to an embodiment of the present invention.

As shown in fig. 3A, the paper deck 30 includes a frame 31 formed with a paper chamber 39 that opens upward, a rim portion 32 located above the paper chamber 39, and two projecting portions 33 located in front of the paper chamber 39, the two projecting portions 33 being spaced apart in the left-right direction with an opening between them that exposes the paper feed roller 13; the rim 32 extends along the outer surface of the frame 31, preferably the rim 32 extends around the opening of the paper cavity 39 for engaging the paper bin 30 with the housing 11; further, the paper deck 30 is also provided with a locking portion 34, and the locking portion 34 is used to lock the upper cover assembly 20 with the main assembly 10.

The transmission mechanism 40 is for transmitting the driving force output from a motor/driving force output member (not shown) mounted in the chamber 12 to the sheet-feeding roller 13, and as shown in fig. 3A, the transmission mechanism 40 includes an intermediate transmission assembly 41 and a drive gear 42, and the intermediate transmission assembly 41 transmits the driving force to the drive gear 42 and drives the sheet-feeding roller 13 to rotate by the drive gear 42.

The intermediate transmission assembly 41 includes a first gear 411, a second gear 412 and a third gear 413 which are engaged in sequence, wherein the first gear 411 receives the driving force, and the third gear 413 is engaged with the driving gear 42; when the paper feeding roller 13 is a hollow cylindrical roller body, the transmission mechanism 40 further comprises a transmission shaft 43 combined with the driving gear 42, the paper feeding roller 13 is coated on the outer surface of the transmission shaft 43, and the driving gear 42 drives the transmission shaft 43 to rotate so as to drive the paper feeding roller 13 to rotate; when the paper feeding roller 13 is a roller body having a transmission shaft 43, the transmission shaft 43 may be directly coupled to the driving gear 42, or an intermediate member may be installed between the driving gear 42 and the transmission shaft 43 to transmit a driving force; the two ends of the paper feeding roller 13 and the two ends of the transmission shaft 43 are opposite to the convex part 33 and are clamped and fixed by the clamping part 84 of the bracket 80, namely, the paper feeding roller 13 and the transmission shaft 43 are clamped between the convex part 33 and the clamping part 84 of the bracket, so that the mounting mode is simple, and the paper feeding roller 13 and the transmission shaft 43 can be stably fixed.

As shown in fig. 9, when viewed in the left-right direction, at least a portion of the transmission mechanism 40 overlaps with the paper cavity 39/paper bin 30, which is beneficial to reduce the overall size of the label printer 100, or increase the volume of the paper bin 30 while maintaining the overall size of the label printer 100, so as to reduce the frequency of replacing paper, or increase the available space in the cavity 12 while maintaining the overall size of the label printer 100 and the volume of the paper bin 30, so as to increase the design freedom of the label printer 100, for example, increase the battery capacity of the label printer 100, increase more functions, and so on.

As shown in fig. 10, the surface of the paper bin frame 31 is further provided with a plurality of limiting protrusions 35, each limiting protrusion 35 corresponds to a gear, the movement of the gear in the radial direction is limited, further, as shown in fig. 9, the first gear 411 and the second gear 412 are both duplicate gears, the large gear part of the first gear 411 is closer to the frame 31 than the small gear part, the large gear part of the second gear 412 is farther from the frame 31 than the small gear part, when the transmission mechanism 40 is completely assembled, the large gear part of the second gear 412 is located farthest from the frame 31, and a part of the large gear part of the first gear 411 and a part of the third gear 413 are located between the large gear part of the second gear 412 and the frame 31 and are protected.

As shown in fig. 3B, the first housing 11a further includes a concave portion 11a4 that is concave from the inside (the side facing the cavity 12) toward the direction away from the cavity 12, the concave portion 11a4 is opposite to the large gear portion of the second gear 412, and finally, the second gear 412 is restricted by the first housing 11 a.

[ example two ]

Fig. 11 is a state diagram of a partial exploded view of a transmission mechanism in a label printer according to a second embodiment of the present invention.

The present embodiment is different from the above-described embodiment in that the structure of the transmission mechanism 40 is modified, as shown in fig. 11, the intermediate transmission assembly 41 of the transmission mechanism includes the first gear 411 for receiving the driving force and the belt 414 between the first gear 411 and the driving gear 42, so that the intermediate transmission assembly 41 in the present embodiment no longer transmits the driving force by means of gear engagement, but directly transmits the driving force from the first gear 411 to the driving gear 42 by using the belt 414, and not only can a plurality of gears of the intermediate transmission assembly 41 be omitted, the cost of the label printer 100 be reduced, but also the efficiency of the transmission of the driving force is higher. At least a part of the intermediate transfer assembly 41 coincides with the sheet chamber 39 when viewed in the left-right direction.

It can be understood that the surface of the belt 414 may be provided with teeth, and may not be provided with teeth, when the surface of the belt 414 is not provided with teeth, the driving force is transmitted between the belt 414 and the first gear 411 and between the belt 414 and the driving gear 42 by means of static friction, at this time, the first gear 411 may also be provided as a transmission wheel with a rough surface, when the surface of the belt 414 is provided with teeth, the belt 414 and the first gear 411 are combined in an inter-tooth meshing manner, and the belt 414 and the driving gear 42 are also combined in an inter-tooth meshing manner, and likewise, the first gear 411 may also be replaced by a transmission wheel with a rough surface, and such a combination manner is favorable for further improving the transmission efficiency; the drive wheel and the first gear 411 may be collectively referred to as a drive.

As described above, the cutter assembly 70 and the platen assembly 73 may be combined with each other and installed as a single body in a subsequent assembly step, thereby reducing the difficulty of assembling the label printer having the paper cutting mechanism 50.

Claims (10)

1. The paper cutting mechanism is used for cutting paper at the paper outlet of the label printer and comprises a force application assembly and a paper cutting assembly which are mutually combined, the force application assembly is used for receiving acting force and driving the paper cutting assembly to move, and the paper cutting mechanism is characterized in that,

the paper cutting assembly comprises a cutter assembly and a paper pressing assembly which are combined with each other, wherein the cutter assembly is supported by the force application assembly, and the front and back direction and the left and right direction of the paper pressing assembly are limited by the cutter assembly.

2. The paper cutting mechanism of claim 1, wherein the platen assembly is configured to move in an up and down direction relative to the cutter assembly.

3. The cutting mechanism of claim 2, wherein the platen assembly remains stationary after the cutter assembly and the platen assembly move upwardly together a first distance while the force assembly applies the upward force, and the cutter assembly continues to move upwardly a second distance.

4. The paper cutting mechanism of claim 3 further comprising a resilient member mounted between the cutter assembly and the platen assembly.

5. The paper cutting mechanism of claim 2, wherein the cutter assembly includes a blade holder and a blade fixedly mounted to the blade holder such that the highest point of the blade does not exceed the uppermost point of the platen assembly in the up-down direction.

6. The paper cutting mechanism as claimed in any one of claims 1 to 5, wherein the paper cutting mechanism further comprises a support, the cutter assembly further being supported by the support.

7. The paper cutting mechanism of claim 6, wherein the holder further includes a restriction plate provided therein, and the cutter unit is restricted by the restriction plate in both the front-rear direction and the left-right direction.

8. A label printer, characterised in that the label printer comprises a housing and a cutting mechanism as claimed in any one of claims 1 to 7, a cavity being formed in the housing, a gap being formed in the housing, the cutting mechanism being mounted in the housing with a portion of the cutting mechanism exposed through the gap.

9. A label printer according to claim 8, wherein the housing is formed with a chute extending in an up-down direction on an inner side thereof, the urging member being coupled to the chute.

10. The label printer according to claim 8, further comprising a paper cartridge located in the cavity and a reset member coupled to the cutting mechanism, the reset member further coupled to the housing or the paper cartridge, the cutting mechanism being fixedly mounted to the housing or the paper cartridge.

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