CN220129820U - Printer with a printing mechanism - Google Patents

Abstract

The utility model relates to a printer, which comprises a shell, wherein a paper accommodating cavity and a printing main body are arranged in the shell, the printing main body comprises a printing device, a cutter device and a paper conveying channel, the cutter device comprises a movable blade and a static blade which are respectively arranged at two sides of the paper conveying channel, a cutter cavity is arranged at the upper side of the static blade in the printing main body, and the movable blade can move towards the static blade until being inserted into the cutter cavity to cut off printing paper; the printing machine is characterized in that a paper blocking block is further arranged on the printing main body or the machine shell, the paper blocking block is blocked between the cutter cavity and the paper conveying channel and used for guiding printing paper into the paper conveying channel, the movable blade can push the paper blocking block or the static blade to move to avoid the position in the process of inserting the movable blade into the cutter cavity, and the paper blocking block or the static blade can reset. The paper blocking block is arranged between the cutter cavity and the paper conveying channel, so that the problem of paper jam caused by the fact that the end part of printing paper enters the cutter cavity can be solved.

Description

Printer with a printing mechanism

Technical Field

The present utility model relates to the technical field of printing equipment, and more particularly to a printer.

Background

The printers for printing receipts such as shopping list, registration list and medicine bill list are thermal receipt printers or dot matrix receipt printers, the printers all adopt roll printing paper for printing, and strip continuous printing paper is conveyed by a printing rubber roller and is output by a paper outlet after sequentially passing through a printing head and a cutter device. The cutter device in the prior art comprises a static blade and a movable blade which are respectively positioned at two sides of the printing paper transmission path, a cutter cavity is further formed in one side of the static blade, and the movable blade can move towards the static blade and extend into the cutter cavity, so that printing paper is cut off. Since the roll paper is curled in a natural state, the end of the curled paper is easily entered into the cutter cavity at the time of conveyance, which may cause paper jam.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a printer which can solve the problem of paper jam caused by the fact that the end part of printing paper enters the cavity of the cutter.

The technical scheme includes that the printer comprises a shell, a paper accommodating cavity and a printing main body are arranged in the shell, the printing main body comprises a printing device, a cutter device and a paper conveying channel, the cutter device comprises a movable blade and a static blade which are respectively arranged at two sides of the paper conveying channel, a cutter cavity is formed in the printing main body at the upper side of the static blade, and the movable blade can move towards the static blade until being inserted into the cutter cavity to cut off printing paper; the printing machine is characterized in that a paper blocking block is further arranged on the printing main body or the machine shell, the paper blocking block is blocked between the cutter cavity and the paper conveying channel and used for guiding printing paper into the paper conveying channel, the movable blade can push the paper blocking block or the static blade to move to avoid the position in the process of inserting the movable blade into the cutter cavity, and the paper blocking block or the static blade can reset.

Compared with the prior art, the printer has the following advantages: in the process of cutting off the printing paper, the movable blade moves towards the static blade and pushes the paper blocking block or the static blade to move away from the position until the movable blade is inserted into the cutter cavity, so that the printing paper can be smoothly cut off, namely, the paper blocking block is arranged and the cutting of the printing paper by the cutter device is not influenced; in the printing process, the cutter device does not act, the paper blocking block or the static blade is reset, and then the paper blocking block is blocked between the cutter cavity and the paper conveying channel, and can guide printing paper into the paper conveying channel, so that the problem of paper jam caused by the fact that the end part of the printing paper enters the cutter cavity is solved.

Preferably, the paper blocking block is rotatably connected with the printing main body or the machine shell, a paper blocking block torsion spring is arranged between the paper blocking block and the printing main body or the machine shell, and two ends of the paper blocking block torsion spring respectively collide with the paper blocking block and the printing main body or the machine shell; when the paper blocking block torsion spring is in a natural state, the lower side of the paper blocking block contacts with the upper side of the static blade to block the cutter cavity outwards; the movable blade can push the paper blocking block to rotate in the cavity of the cutter and compress the paper blocking block torsion spring, and the paper blocking block torsion spring can rebound to drive the paper blocking block to reset. By adopting the structure, the paper blocking block can rotate to keep away the movable blade, and the movable blade pushes the paper blocking block to rotate towards the inside of the cutter cavity in the process of cutting off the printing paper, so that the movable blade can be inserted into the cutter cavity to smoothly cut off the printing paper; the paper blocking block torsion spring can drive the paper blocking block to reset, so that the lower side of the paper blocking block contacts with the upper side of the static blade to block the cutter cavity outwards, and paper jam caused by the fact that printing paper enters the cutter cavity can be avoided.

Preferably, the printing main body or the casing is further provided with a limiting structure, and the limiting structure is used for limiting the paper blocking block when the torsion spring of the paper blocking block rebounds. By adopting the structure, the paper blocking block can be prevented from excessive movement in the resetting process, the lower side of the paper blocking block after resetting and the upper side of the static blade are contacted with the external blocking cutter cavity, and the paper jam caused by the occurrence of a gap between the paper blocking block and the static blade is avoided.

Preferably, the paper blocking block is slidably connected with the printing main body or the machine shell, a telescopic elastic piece is arranged between the paper blocking block and the printing main body or the machine shell, and when the telescopic elastic piece is in a natural state, the lower side of the paper blocking block contacts with the upper side of the static blade to block the cutter cavity outwards; the movable blade can push the paper blocking block to slide into the cavity of the cutter and compress the telescopic elastic piece, and the telescopic elastic piece can rebound to drive the paper blocking block to reset. By adopting the structure, the paper blocking block can slide back and forth to avoid the position of the movable blade, and the movable blade pushes the paper blocking block to slide into the cavity of the cutter in the process of cutting off the printing paper, so that the movable blade can be inserted into the cavity of the cutter to smoothly cut off the printing paper; the paper blocking block is driven to reset by the rebound energy of the telescopic elastic piece, so that the lower side of the paper blocking block contacts with the upper side of the static blade to block the cutter cavity outwards, and paper jam caused by the fact that printing paper enters the cutter cavity is avoided.

Preferably, the paper blocking block is a thin sheet made of soft elastic materials, the upper side or the upper part of the paper blocking block is fixed on the printing main body or the shell, the lower side of the paper blocking block contacts with the upper side of the static blade to block the cutter cavity outwards, the lower side of the paper blocking block can be extruded in the process of inserting the movable blade into the cutter cavity, the paper blocking block is elastically deformed to avoid the movable blade, and the paper blocking block is reset after the movable blade exits from the cutter cavity. By adopting the structure, the paper blocking block can elastically deform to keep away the movable blade, and the movable blade extrudes the lower side of the paper blocking block in the process of cutting off the printing paper by the cutter device, so that the movable blade can be inserted into the cutter cavity to smoothly cut off the printing paper; after the movable blade retreats from the cutter cavity, the paper blocking block is restored, and the lower side of the paper blocking block is contacted with the upper side of the static blade again to block the cutter cavity outwards, so that paper jam caused by the fact that printing paper enters the cutter cavity is avoided.

Preferably, the lower side of the paper blocking block contacts with the upper side of the static blade to block the cutter cavity, a static blade elastic piece is arranged between the lower side of the static blade and the printing main body, the static blade can be pressed down by the movable blade in the process of inserting the cutter cavity to enable the static blade to be separated from the paper blocking block, meanwhile, the static blade elastic piece is compressed, and the static blade elastic piece can rebound to enable the static blade to reset. By adopting the structure, the static blade can move up and down to avoid the moving blade, and the moving blade presses the static blade to separate the static blade from the paper blocking block in the process of cutting off the printing paper by the cutter device, so that the moving blade can be inserted into the cutter cavity to smoothly cut off the printing paper; the static blade elastic piece can rebound to drive the static blade to reset, so that the lower side of the paper blocking block contacts with the upper side of the static blade again to block the cutter cavity outwards, and paper jam caused by the fact that printing paper enters the cutter cavity is avoided.

Preferably, the printing main body is internally provided with a pressing rod and a supporting block which are vertically opposite, the inner side of the static blade is limited between the supporting block and the pressing rod, and the outer side of the static blade is a free side which is opposite to the paper conveying channel and can swing up and down around the inner side of the static blade. By adopting the structure, the static blade can swing up and down to avoid the moving blade, namely, the moving blade presses the static blade downwards to enable the outer side of the static blade to swing downwards so as to be separated from contact with the paper blocking block, and then the moving blade can be inserted into the cavity of the cutter; the elastic piece of the static blade can rebound to drive the outer side of the static blade to swing upwards until contacting with the paper blocking block again to block the cutter cavity outwards, so that the printing paper is prevented from entering the cutter cavity to cause paper jam.

Preferably, the static blade is slidably connected with the printing main body, the static blade can slide downwards by pressing the static blade by the moving blade, and the static blade elastic piece can return to the elastic state to enable the static blade to slide upwards and reset. By adopting the structure, the static blade can slide up and down to avoid the position of the movable blade, and the movable blade presses the static blade downwards to enable the static blade to slide downwards so as to be separated from contact with the paper blocking block, so that the movable blade can be inserted into the cavity of the cutter; the static blade elastic piece can rebound to drive the static blade to slide upwards until contacting with the paper blocking block again to block the cutter cavity outwards, so that the printing paper is prevented from entering the cutter cavity to cause paper jam.

Preferably, the inner side of the static blade is hinged with the printing main body, the outer side of the static blade is a free side opposite to the paper conveying channel and can rotate up and down around the hinged part of the static blade and the printing main body. By adopting the structure, the static blade can swing up and down to avoid the moving blade, and the connection structure between the inner side of the static blade and the printing main body is simple and easy to assemble.

Preferably, the printing main body is formed by left and right matching of a fixed cutter mechanism and a movable cutter mechanism, the paper conveying channel is positioned between the fixed cutter mechanism and the movable cutter mechanism, the printing device comprises a printing rubber roller arranged on the fixed cutter mechanism and a printing head arranged on the movable cutter mechanism, the static cutter is arranged on the fixed cutter mechanism and is positioned above the printing rubber roller, the movable cutter is arranged on the movable cutter mechanism and is opposite to the static cutter in a spaced mode, a paper guide piece is arranged between the printing rubber roller and the static cutter on the fixed cutter mechanism, and the paper guide piece is used for guiding printing paper into the paper conveying channel. By adopting the structure, the paper guide is arranged between the printing rubber roller and the static blade, so that paper jam caused by the fact that printing paper enters a gap between the printing rubber roller and the static blade can be avoided.

Drawings

Fig. 1 is a top view of a printer of the present utility model.

Fig. 2 is a cross-sectional view in the direction A-A of fig. 1.

Fig. 3 is a schematic perspective view of the cross-section in the direction B-B of fig. 1.

Fig. 4 is a schematic perspective view of the C-C section of fig. 1.

Fig. 5 is a schematic view of the structure of a printing body in the printer of the present utility model.

Fig. 6 is a cross-sectional view of a printing body in the printer of the present utility model.

As shown in the figure: 1. the printing machine comprises a machine shell, 2, a base, 3, an upper cover, 4, a front cover, 5, a cover opening button, 6, a paper accommodating cavity, 7, a paper outlet, 8, a fixed cutter mechanism, 8-1, a supporting block, 8-2, a compression bar, 8-3, a cutter cavity, 9, a static blade, 10, a static blade spring, 11, a paper blocking block, 11-1, a paper blocking block torsion spring, 12, a printing rubber roller, 13, a movable cutter mechanism, 14, a movable blade, 15, a movable cutter driving, 16, a movable cutter spring, 17 and a printing head.

Detailed Description

For a better understanding of the utility model, various aspects of the utility model will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the utility model and is not intended to limit the scope of the utility model in any way. Like reference numerals refer to like elements throughout the specification.

In the drawings, the thickness, size and shape of the object have been slightly exaggerated for convenience of explanation. The figures are merely examples and are not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including" and/or "having," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Furthermore, when an expression such as "… at least one" occurs after a list of features listed, the entire listed feature is modified rather than modifying a separate element in the list.

Example 1:

as shown in fig. 1 to 4, the printer of the present utility model comprises a casing 1, a base 2 is provided at the lower end of the casing 1, an upper cover 3, a front cover 4 and a cover opening button 5 are provided at the upper end of the casing 1, a paper outlet 7 is provided between the upper cover 3 and the front cover 4, a paper containing cavity 6 is provided below the upper cover 3 in the casing 1, the paper containing cavity 6 is used for containing a roll of printing paper, and pressing the cover opening button 5 can cause the upper cover 3 to flip upwards to open, so that the roll of printing paper can be placed or replaced.

The casing 1 is also internally provided with a printing main body, as shown in fig. 2 and 6, the printing main body comprises a fixed cutter mechanism 8 arranged on the lower side of the upper cover 3 and a movable cutter mechanism 13 arranged on the lower side of the front cover 4, the fixed cutter mechanism 8 and the movable cutter mechanism 13 are matched left and right to form a printing device and a cutter device, a paper conveying channel is arranged between the fixed cutter mechanism 8 and the movable cutter mechanism 13, and the paper conveying channel is positioned above the printing device and is communicated with the paper outlet 7.

The printing device comprises a printing rubber roller 12 arranged on the fixed cutter mechanism 8 and a printing head 17 arranged on the movable cutter mechanism 13, the roll printing paper is externally output into the paper conveying channel through the printing rubber roller 12, and the printing head 17 is opposite to the printing rubber roller 12 and can be abutted against the printing rubber roller 12 to print the printing paper.

The cutter device comprises a movable blade 14 and a static blade 9 which are respectively arranged on two sides of a paper conveying channel, the static blade 9 is arranged on the fixed blade mechanism 8 and is positioned above the printing rubber roller 12, the movable blade 14 is arranged on the movable blade mechanism 13 and is opposite to the static blade 9 in a spaced mode, a movable blade drive 15 and a movable blade spring 16 are further arranged in the movable blade mechanism 13, the movable blade drive 15 can drive the movable blade 14 to move towards the static blade 9 so as to cut off printing paper, the movable blade spring 16 is compressed in the process, and the movable blade spring 16 rebounds to enable the movable blade 14 to retract and separate from the static blade 9, so that faults caused by bonding of the movable blade 14 and the static blade 9 are avoided. The fixed cutter mechanism 8 is provided with a paper guide piece between the printing rubber roller 12 and the static blade 9, wherein the paper guide piece is a thin iron sheet and is used for guiding the printing paper passing through the printing head 17 into the paper conveying channel.

The fixed knife mechanism 8 is internally provided with a cutter cavity 8-3 at the upper side of the static blade 9, and the movable blade 14 is required to be inserted into the cutter cavity 8-3 when being matched with the static blade 9 to cut off printing paper. The shell 1 is also provided with a paper blocking block 11, the paper blocking block 11 is blocked between the cutter cavity 8-3 and the paper conveying channel, and the paper blocking block 11 can guide printing paper into the paper conveying channel, so that the printing paper is smoothly output from the paper outlet 7, and paper jam faults caused by the entering of the printing paper are avoided. When the cutter device cuts off printing paper, the paper blocking block 11 can move to keep away the movable blade 14, and the movable blade 14 is not blocked from being inserted into the cutter cavity 8-3, so that the movable blade 14 is not influenced to cut off the printing paper; when the printing device is used for printing, the paper blocking block 11 can be reset and blocked between the cutter cavity 8-3 and the paper conveying channel again.

As shown in fig. 5 and 6, both ends of the paper blocking block 11 are provided with rotating shafts, and the rotating shafts are inserted into the opposite housings 1 at both sides, so that the paper blocking block 11 can rotate on the housing 1. The rotating shaft is provided with a paper blocking block torsion spring 11-1, two ends of the paper blocking block torsion spring 11-1 are respectively abutted against the paper blocking block 11 and the shell 1, when the paper blocking block torsion spring 11-1 is in a natural state, the lower side of the paper blocking block 11 is contacted with the upper side of the static blade 9 to block the cutter cavity 8-3 outwards, and the rear end of the paper blocking block 11 is contacted with the front end of the upper cover 3. When the cutter device cuts off printing paper, the movable blade 14 pushes the paper blocking block 11 to rotate into the cutter cavity 8-3 to keep away the movable blade 14, so that the movable blade 14 can be inserted into the cutter cavity 8-3, the paper blocking block torsion spring 11-1 is compressed in the process, and the rear end of the paper blocking block 11 is separated from contact with the front end of the upper cover 3. When the movable blade 14 exits the cutter cavity 8-3, the acting force of the paper blocking block 11 is not applied any more, and the paper blocking block torsion spring 11-1 rebounds to drive the paper blocking block 11 to reset until the rear end of the paper blocking block 11 contacts with the front end of the upper cover 3. That is, the contact part between the rear end of the paper blocking block 11 and the front end of the upper cover 3 is a limiting structure, and the paper blocking block 11 is limited when the paper blocking block torsion spring 11-1 rebounds, so that the phenomenon that a gap which is easy to cause paper jam is formed between the lower side of the paper blocking block 11 and the upper side of the static blade 9 due to excessive rotation of the paper blocking block 11 is avoided.

The printing machine is characterized in that a pressing rod 8-2 and a supporting block 8-1 which are vertically opposite are arranged in the printing main body, the inner side of a static blade 9 is limited between the supporting block 8-1 and the pressing rod 8-2, the outer side of the static blade 9 is a free side which is opposite to the paper conveying channel and can swing up and down around the inner side of the static blade 9, and a static blade elastic piece, namely a static blade spring 10, is arranged between the lower side of the static blade 9 and the printing main body. The movable blade 14 can press down the stationary blade 9 during the process of inserting the cutter cavity 8-3, so that the outer side of the stationary blade 9 swings downward around the inner side of the stationary blade 9 until the movable blade 14 is inserted into the cutter cavity 8-3, the stationary blade 9 is out of contact with the paper stop 11, and the stationary blade spring 10 is compressed. When the movable blade 14 is withdrawn from the cutter cavity 8-3, the static blade spring 10 is sprung back to enable the outer side of the static blade 9 to swing upwards around the inner side of the static blade 9 until the static blade 9 is reset, and the contact with the lower side of the paper blocking block 11 is continued to block the cutter cavity 8-3 outwards.

Example 2:

the printer of this embodiment is different from embodiment 1 in that the two sides of the paper blocking block 11 are slidably connected with the casing 1, the two sides of the paper blocking block 11 are respectively provided with a sliding strip, the two opposite sides in the casing 1 are provided with sliding grooves, the sliding strips on the two sides of the paper blocking block 11 are slidably matched with the sliding grooves on the two opposite sides in the casing 1, the rear end of the paper blocking block 11 is not contacted with the front end of the upper cover 3, that is, the upper cover 3 does not limit the paper blocking block 11. A retractable spring is arranged between the rear side of the paper blocking block 11 and the printing main body, when the retractable spring is in a natural state, the paper blocking block 11 is contacted with the static blade to block the cutter cavity 8-3 of the paper conveying channel, and the paper blocking block 11 can guide printing paper into the paper conveying channel.

When the cutter device cuts off printing paper, the movable blade 14 pushes the paper baffle 11 to slide into the cutter cavity 8-3, so that the movable blade 14 can be inserted into the cutter cavity 8-3, and the telescopic spring is compressed in the process. When the movable blade 14 is withdrawn from the cutter cavity 8-3, the acting force of the paper blocking block 11 is no longer applied, the retractable spring rebounds to drive the paper blocking block 11 to slide outwards until the paper blocking block is reset, and at the moment, the paper blocking block 11 blocks the cutter cavity 8-3 again and guides printing paper.

Example 3:

the printer of this embodiment is different from embodiment 1 in that the paper blocking block 11 is a sheet made of soft elastic material, such as a rubber sheet, and the upper sides of the paper blocking block 11 and the upper parts of the left and right sides are fixed on the casing 1, and the lower side of the paper blocking block 11 contacts with the upper side of the stationary blade 9, so that the paper blocking block 11 is blocked between the paper feeding channel and the cutter cavity 8-3. The movable blade 14 can squeeze the lower side of the paper blocking block 11 in the process of inserting the movable blade 14 into the cutter cavity 8-3, so that the paper blocking block 11 is elastically deformed to avoid the movable blade 14, and the movable blade 14 can be inserted into the cutter cavity 8-3; after the movable blade 14 exits the cutter cavity 8-3, the paper blocking block 11 is not acted by the acting force of the movable blade 14, so that the paper blocking block 11 is reset, that is, the lower side of the paper blocking block 11 contacts with the upper side of the static blade 9, and the paper blocking block 11 is blocked between the paper conveying channel and the cutter cavity 8-3 again.

Example 4:

the printer of this embodiment is different from embodiment 1 in that the stationary blade 9 is slidably connected with the printing main body, two sides of the stationary blade 9 are respectively provided with a sliding strip, two opposite sides in the casing 1 are respectively provided with a sliding groove, and the sliding strips at two sides of the stationary blade 9 are slidably matched with the sliding grooves at two opposite sides in the casing 1. Still be provided with quiet blade spring 10 between the downside of quiet blade 9 and the printing main part in the aforesaid, move blade 14 and can push down quiet blade 9 in the in-process of inserting cutter cavity 8-3, make quiet blade 9 slide down until move blade 14 insert in the cutter cavity 8-3, quiet blade 9 and fender paper piece 11 break away from contact, quiet blade spring 10 is compressed simultaneously. When the movable blade 14 exits the cutter cavity 8-3, the static blade spring 10 can rebound to enable the static blade 9 to slide upwards until the static blade 9 is reset, and the contact with the lower side of the paper blocking block 11 is continued to block the cutter cavity 8-3 outwards.

Example 5:

the printer of this embodiment is different from embodiment 1 in that the inner side of the stationary blade 9 is hinged to the printing body, the outer side of the stationary blade 9 is a free side opposite to the paper feeding path and can rotate up and down around the hinge position of the stationary blade 9 and the printing body, and a stationary blade spring 10 is still provided between the lower side of the stationary blade 9 and the printing body. The movable blade 14 can press down the static blade 9 in the process of inserting the cutter cavity 8-3, so that the outer side of the static blade 9 rotates downwards around the hinging point of the static blade 9 and the printing main body until the movable blade 14 is inserted into the cutter cavity 8-3, the static blade 9 is separated from contact with the paper blocking block 11, and meanwhile, the static blade spring 10 is compressed. When the movable blade 14 is withdrawn from the cutter cavity 8-3, the static blade spring 10 is sprung back to enable the outer side of the static blade 9 to rotate upwards around the hinge part of the static blade 9 and the printing main body until the static blade 9 is reset, and the contact with the lower side of the paper blocking block 11 is continued to block the cutter cavity 8-3 outwards.

The foregoing is merely exemplary of the present utility model and is not intended to limit the scope of the present utility model; modifications and equivalent substitutions are intended to be included in the scope of the claims without departing from the spirit and scope of the present utility model.

Claims (10)

1. The printer comprises a machine shell (1), wherein a paper accommodating cavity (6) and a printing main body are arranged in the machine shell (1), the printing main body comprises a printing device, a cutter device and a paper conveying channel, the cutter device comprises a movable blade (14) and a static blade (9) which are respectively arranged at two sides of the paper conveying channel, a cutter cavity (8-3) is arranged at the upper side of the static blade (9) in the printing main body, and the movable blade (14) can move towards the static blade (9) until being inserted into the cutter cavity (8-3) to cut off printing paper; the printing machine is characterized in that a paper blocking block (11) is further arranged on the printing main body or the machine shell (1), the paper blocking block (11) is blocked between the cutter cavity (8-3) and the paper conveying channel and used for guiding printing paper into the paper conveying channel, the movable blade (14) can push the paper blocking block (11) or the static blade (9) to move to avoid the position in the process of being inserted into the cutter cavity (8-3), and the paper blocking block (11) or the static blade (9) can reset.

2. Printer according to claim 1, characterized in that a paper blocking block (11) is rotatably connected with the printing main body or the casing (1), a paper blocking block torsion spring (11-1) is arranged between the paper blocking block (11) and the printing main body or the casing (1), and two ends of the paper blocking block torsion spring (11-1) respectively collide with the paper blocking block (11) and the printing main body or the casing (1); when the paper blocking block torsion spring (11-1) is in a natural state, the lower side of the paper blocking block (11) contacts with the upper side of the static blade (9) to block the cutter cavity (8-3) outwards; the movable blade (14) can push the paper blocking block (11) to rotate towards the inside of the cutter cavity (8-3) and compress the paper blocking block torsion spring (11-1), and the paper blocking block torsion spring (11-1) can rebound to drive the paper blocking block (11) to reset.

3. Printer according to claim 2, characterized in that the printing body or the casing (1) is further provided with a limit structure for limiting the paper stop (11) when the paper stop torsion spring (11-1) rebounds.

4. Printer according to claim 1, characterized in that the paper blocking block (11) is slidably connected with the printing main body or the casing (1), a telescopic elastic piece is arranged between the paper blocking block (11) and the printing main body or the casing (1), and when the telescopic elastic piece is in a natural state, the lower side of the paper blocking block (11) contacts with the upper side of the static blade (9) to block the cutter cavity (8-3) outwards; the movable blade (14) can push the paper blocking block (11) to slide into the cutter cavity (8-3) and compress the telescopic elastic piece, and the telescopic elastic piece can rebound to drive the paper blocking block (11) to reset.

5. Printer according to claim 1, characterized in that the paper blocking block (11) is a thin sheet made of soft elastic material, the upper side or upper part of the paper blocking block (11) is fixed on the printing main body or the casing (1), the lower side of the paper blocking block (11) and the upper side of the static blade (9) are contacted to block the cutter cavity (8-3) outwards, the lower side of the paper blocking block (11) can be extruded in the process of inserting the movable blade (14) into the cutter cavity (8-3), the paper blocking block (11) is elastically deformed to avoid the position of the movable blade (14), and the paper blocking block (11) is reset after the movable blade (14) exits the cutter cavity (8-3).

6. Printer according to claim 1, characterized in that the underside of the paper blocking block (11) contacts the upper side of the stationary blade (9) to block the cutter cavity (8-3) outwards, a stationary blade elastic member is arranged between the underside of the stationary blade (9) and the printing main body, the movable blade (14) can press down the stationary blade (9) to separate the stationary blade (9) from the paper blocking block (11) in the process of inserting the cutter cavity (8-3), and at the same time, the stationary blade elastic member is compressed, and the stationary blade elastic member can rebound to reset the stationary blade (9).

7. The printer according to claim 6, wherein the printing main body is provided with a pressing rod (8-2) and a supporting block (8-1) which are opposite to each other up and down, the inner side of the static blade (9) is limited between the supporting block (8-1) and the pressing rod (8-2), and the outer side of the static blade (9) is a free side opposite to the paper conveying channel and can swing up and down around the inner side of the static blade (9).

8. The printer according to claim 6, wherein the stationary blade (9) is slidably connected to the printing body, the movable blade (14) presses the stationary blade (9) downward, the stationary blade (9) is slid downward, and the stationary blade elastic member springs back to return the stationary blade (9) upward.

9. The printer according to claim 6, wherein the inner side of the stationary blade (9) is hinged to the printing body, and the outer side of the stationary blade (9) is a free side opposite to the paper feeding path and is rotatable up and down around a hinge portion of the stationary blade (9) and the printing body.

10. The printer according to claim 1, wherein the printing main body is formed by left and right matching of a fixed cutter mechanism (8) and a movable cutter mechanism (13), the paper conveying channel is located between the fixed cutter mechanism (8) and the movable cutter mechanism (13), the printing device comprises a printing rubber roller (12) arranged on the fixed cutter mechanism (8) and a printing head (17) arranged on the movable cutter mechanism (13), the static cutter (9) is arranged on the fixed cutter mechanism (8) and is located above the printing rubber roller (12), the movable cutter (14) is arranged on the movable cutter mechanism (13) and is opposite to the static cutter (9) in a spaced mode, and a paper guide piece is arranged between the printing rubber roller (12) and the static cutter (9) on the fixed cutter mechanism (8) and is used for guiding printing paper into the paper conveying channel.