CN215397755U - Compact portable printer - Google Patents

Abstract

A compact portable printer comprising a housing, a printing assembly, a key assembly and a cutter assembly; the casing is equipped with exit slot, its characterized in that: the shell is provided with an upper shell, a lower shell and a mounting seat, wherein the upper shell and the lower shell are in rotatable connection and are provided with a buckle assembly to realize locking or unlocking; the mount pad is equipped with fixed plate and a plurality of closing caps, and this a plurality of closing caps are fixed in fixed plate one side in order to form a plurality of cavities and paper feed passageway, and printing subassembly and/or button cutter unit mount in one of them cavity and lie in paper feed passageway lateral part, still are formed with between these a plurality of closing caps periphery, fixed plate and the inferior valve inner wall and hold the paper groove in order to place the stock form. The utility model adopts the buckle type cover opening to save labor, has compact layout and large paper containing space, and is beautiful.

Description

Compact portable printer

Technical Field

The utility model relates to the field of printers, in particular to a compact portable printer.

Background

At present, the miniature label printer of temperature sensing on the market is provided with manual cut paper structure, print assembly, the subassembly of form advancing, control circuit board, carton and battery etc. and its print assembly can adopt the temperature sensing print assembly, and the carton is used for placing the stock form, and the subassembly of form advancing is used for conveying the paper from the carton to print assembly department and prints, reachs manual cut paper structure department again and carries out manual cut paper, and control circuit board is used for controlling each part work, and the battery is used for supplying power for control circuit board.

In the existing structure, the cover opening mode of the shell is directly separated after being opened or is opened by hands in the whole process, the operation is time-consuming and labor-consuming, the manual paper cutting structure, the printing assembly, the paper feeding assembly, the control circuit board, the paper box and the battery are all installed in the same space of the shell, the whole structure is not attractive enough, the structural layout is limited easily, the paper box is small, and the capacity is limited. The control circuit board is powered by a dry battery, has larger volume and needs to be replaced, and has limitation on the structural layout of the whole machine, thereby having inconvenience.

In addition, among the current manual paper cutting structure, be provided with cutter unit spare, button subassembly and paper bearing structure etc. be equipped with on the cutter unit spare and press paper structure and cutter, after printing, through pressing the button subassembly, press the paper structure and press paper, then the cutter cuts paper again. In order to prevent paper jam, a local clearance is reserved in front of the paper cutting position (the side of the cutter far away from the paper outlet) to serve as a paper guide structure. Because keep away the unsettled and apart from great in vacancy paper back, the intersection line of paper and the plane of perpendicular to paper direction of motion is similar to the straight line simultaneously, and the anti ability of buckling of paper is not good, and paper and cutting edge contact position can move a long section distance with the cutter under the effort of cutter during the cut paper, cause the paper to be difficult for cutting off.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to overcome the defects of the existing printer that the layout is not compact enough, the uncovering operation is labor-saving, the paper box capacity is small and the like, and provides a compact portable printer which can be uncovered with less labor and can increase the paper containing space.

The utility model adopts the following technical scheme:

a compact portable printer comprising a housing, a printing assembly, a key assembly and a cutter assembly; the casing is equipped with exit slot, its characterized in that: the shell is provided with an upper shell, a lower shell and a mounting seat, wherein the upper shell and the lower shell are in rotatable connection and are provided with a buckle assembly to realize locking or unlocking; the mount pad is equipped with fixed plate and a plurality of closing caps, and this a plurality of closing caps are fixed in fixed plate one side in order to form a plurality of cavities and paper feed passageway, and printing subassembly and/or button cutter unit mount in one of them cavity and lie in paper feed passageway lateral part, still are formed with between these a plurality of closing caps periphery, fixed plate and the inferior valve inner wall and hold the paper groove in order to place the stock form.

Preferably, the upper shell is provided with a buckling groove, the lower shell is provided with a first key, the first key is provided with a buckling strip, and the buckling strip can be buckled into or separated from the buckling groove to realize locking or unlocking; or the lower shell is provided with a rotating shaft, the upper shell is provided with a connecting part, and the connecting part is rotatably connected with the rotating shaft; the unlocking device further comprises a torsion spring, and the torsion spring penetrates through the rotating shaft to drive the upper shell to be opened when the unlocking is carried out.

Preferably, the printing assembly is provided with a printing unit, and the printing unit is movably connected with the mounting seat and is provided with a transmission groove; the upper shell is also provided with a pushing block, and the pushing block can be in transmission fit with the transmission groove to enable one end of the printing unit to move towards the direction close to or far away from the paper feeding channel.

Preferably, the battery fixing device further comprises a battery and a control main board, wherein the control main board and the battery are fixed on the other side of the fixing plate.

Preferably, the device further comprises a paper guide plate which can move relative to the mounting seat; the paper guide plate is arranged on the paper guide plate, a gap for paper to pass through is arranged between the cutter assembly and the paper guide plate, the cutter assembly is further provided with a transmission part, and the paper guide plate is in transmission fit with the transmission part so as to move to clamp paper when the cutter assembly presses paper.

Preferably, the paper guide plate is arranged to rotate relative to the mounting seat and is provided with a protrusion; the transmission part is a pushing plate which is in abutting contact with the protrusion; or the paper guide plate is arranged to be capable of lifting relative to the mounting base and is provided with a first tooth part; the transmission part is provided with a second tooth part; the gear is meshed with the first tooth part and the second tooth part.

Preferably, the cutter assembly comprises a cutter element, an elastic element and a paper pressing plate; the cutter piece is in sliding fit with the mounting seat and is provided with a first chute, and an included angle is formed between the first chute and the paper cutting direction; the paper pressing plate is in sliding fit with the first sliding chute, and the end part of the paper pressing plate is opposite to the paper guide plate; the cutter piece is in transmission connection with the key assembly; the elastic member is connected between the paper pressing plate and the cutter member.

Preferably, the paper guide plate is provided with an elastic return piece which is an elastic arm or a torsion spring; or the paper guide plate is provided with a first arc-shaped surface along the width direction of the paper, the corresponding end of the cutter assembly is provided with a second arc-shaped surface, and the first arc-shaped surface is matched with the second arc-shaped surface.

Preferably, the key assembly is provided with a second key, a transmission rod and a return piece; the mounting seat is provided with a second chute, and an included angle is formed between the second chute and the paper cutting direction; the second key is slidably arranged in the second sliding chute in a penetrating way and is rotatably connected with one end of the transmission rod; the other end of the transmission rod is rotatably connected with the cutter assembly; the reset piece is connected with the second key to drive the first key to reset.

Preferably, the key assembly further comprises a connecting rod, one end of the connecting rod is rotatably connected with the second key, and the other end of the connecting rod is rotatably connected with the mounting seat; the transmission rod and the connecting rod are respectively positioned on two opposite sides of the second key.

As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages:

1. according to the printer, the upper shell and the lower shell are in rotatable connection and are provided with the buckle assemblies to realize locking or unlocking, the cover opening is labor-saving, and the operation is simple; through closing cap and fixed plate fixed connection in order to form paper feed passageway and a plurality of cavity, printing module and cutter unit mount are in one of them cavity, and the paper groove that holds between these a plurality of closing cap peripheries, fixed plate and the inferior valve is used for placing the stock form, compact structure, more pleasing to the eye and increased the capacity that holds the paper groove.

2. According to the printer, the upper shell is further provided with the pushing block, when the upper shell is closed or opened relative to the lower shell, the pushing block can be in transmission fit with the transmission groove, so that the printing unit moves towards the direction close to or far away from the paper feeding channel, and the linkage structure is adopted, so that subsequent printing operation or paper loading operation is facilitated.

3. According to the printer, the printing assembly, the key assembly and the cutter assembly are positioned on one side of the fixing plate, the battery and the control main board are positioned on the other side of the fixing plate, different functional assemblies are partitioned, the structure is compact, and the maintenance is convenient.

4. According to the printer, the paper guide plate is arranged to rotate or lift, the cutter assembly is provided with the transmission part, when the cutter assembly presses paper, the paper guide plate is driven to act through the transmission part to clamp the paper, the hanging length of the back of the paper near the blade is reduced, the smooth paper cutting of the blade is facilitated, the structure is simple, and the realization is easy.

5. According to the printer of the utility model in the market, the pressing direction of the key assembly and the paper cutting direction form an included angle, and by adopting the structure, the cover opening is labor-saving, the key stroke of the paper cutting is short, the hand feeling is good, and the layout is easy; its nipper is sliding fit with cutter spare, and can follow first spout and remove, and the elastic component is connected between nipper and cutter spare, through the action of button subassembly drive cutter spare, realizes pressing paper in proper order, pressing from both sides paper and cut paper.

6. In the printer, the transmission part can adopt the pushing plate and is matched with the paper guide plate bulge to realize transmission, the structure is simple, and paper pressing and paper cutting operations are not influenced; or the transmission part can be arranged to be liftable and realized by utilizing the transmission of the gear and the rack, and can be selected according to different requirements.

7. According to the paper guide device, the paper guide plate is provided with the first cambered surface, the paper pressing plate is correspondingly provided with the second cambered surface, so that when paper is clamped, the paper can form the cambered surface with better bending strength, and the next paper cutting operation is facilitated

8. According to the printer, the connecting rod and the transmission rod are arranged on the two opposite sides of the second key, so that when the second key slides, the left side and the right side are stressed more evenly, and the pressing is smoother.

9. According to the printer, the second key can be arranged on the side part of the lower shell and can be pressed along the radial direction of the lower shell, so that the pressing stroke of the key can be reduced, the ergonomic requirement is met, and the more compact structural layout can be realized.

Drawings

FIG. 1 is an overall view of the present invention;

FIG. 2 is an exploded view of FIG. 2;

FIG. 3 is a view of the assembly on the mount in profile (without the cover);

FIG. 4 is a schematic view of the fixing plate and the cover;

FIG. 5 is a diagram of a key cutter assembly (embodiment one);

FIG. 6 is a diagram of a key cutter assembly (embodiment one);

FIG. 7 is a partial view of the mounting base;

FIG. 8 is a partial cross-sectional view of the present invention;

FIG. 9 is a partial cross-sectional view (cut sheet) of the present invention;

FIG. 10 is a cross-sectional view of the present invention;

FIG. 11 is a block diagram of a second embodiment of the present invention;

wherein:

10. a cutter component, 11, a cutter component, 11a, a slide block, 12, an elastic component, 13, a paper pressing plate, 14, a blade, 15, a first sliding groove, 16, a second arc-shaped surface, 17, a transmission part, 18, a sliding groove, 20, a key component, 21, a second key, 22, a transmission rod, 23, a second sliding groove, 24, a connecting rod, 25, a return component, 26, a pressing part, 27, a sliding part, 30, a paper guide plate, 31, a rotating shaft, 32, a bulge, 33, a first arc-shaped surface, 34, an elastic return component, 35, a first tooth part, 36, a gear, 37, a limiting block, 40, a shell, 41, an upper shell, 41a buckling groove, 41b, a pushing block, 42, a lower shell, 43, a fixing plate, 44, a sealing cover, 45, a paper outlet, 46, a paper containing groove, 47, a mounting seat, 47a, a paper feeding channel, 48, a first key, 48a buckling strip, 49, a charging opening, 50, a battery, 60, a control main board, 70. printing component, 71, driving groove.

Detailed Description

The utility model is further described below by means of specific embodiments.

The terms "first", "second", and the like in the present invention are merely for convenience of description to distinguish different constituent elements having the same name, and do not denote a sequential or primary-secondary relationship.

In the description of the present invention, the directions or positional relationships indicated by "upper", "lower", "left", "right", "front", and "rear", etc. are used as the directions or positional relationships indicated on the drawings, and are only for convenience of describing the present invention, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the scope of the present invention.

Referring to fig. 1 and 2, a compact portable printer includes a housing 40, a printing assembly 70, a key assembly 20, a cutter assembly 10, and the like; the casing 40 is provided with a paper outlet 45, the casing 40 is further provided with an upper casing 41, a lower casing 42 and a mounting seat 47, the upper casing 41 and the lower casing 42 are rotatably connected, and a buckle assembly is arranged between the upper casing 41 and the lower casing 42 to realize locking or unlocking.

Referring to fig. 3 and 4, the mounting base 47 of the present invention is provided with a fixing plate 43 and a plurality of covers 44, and the plurality of covers 44 are fixed to one side of the fixing plate 43 to form a paper feeding path 47a and a plurality of chambers. The printing assembly 70, the key assembly 20 and the cutter assembly 10 are installed in one of the cavities and may be located on the same side or different sides of the paper feeding path 47a, and other cavities may be used for disposing other functional components, such as a paper feeding unit and the like.

The covers 44 are located on the side of the fixing plate 43 opposite to the upper case 41, and a paper containing slot 46 is formed between the periphery of the covers and the fixing plate 43 and the lower case 42, and the paper containing slot 46 can contain roll paper. The inner wall of the lower case 42 is used as a partial side wall of the paper accommodating groove 46, and the space of the paper accommodating groove 46 is increased.

The housing 40 may be circular or rectangular, but is not limited thereto. The lower case 42 is provided with a rotation shaft, and the upper case 41 is provided with a coupling portion rotatably coupled to the rotation shaft. Specifically, the upper shell 41 is provided with a fastening groove 41a, the lower shell 42 is provided with a first button 48, the first button 48 is provided with a fastening strip 48a, and the fastening strip 48a can be fastened into or separated from the fastening groove 41a to realize locking or unlocking of the upper cover. Alternatively, the upper case 41 may be provided with a buckle bar, and the first button 48 may be provided with a buckle groove. In practical applications, the first button 48 may also be disposed on the cover 44.

Specifically, the first button 48 is provided with an elastic arm, so that the elastic arm has elasticity and can deform to enable the buckling strip 48a to be buckled into the buckling groove 41a, so as to lock the upper shell 41, and when the first button 48 is pressed, the buckling strip 48a can be separated from the buckling groove 41a, so that the upper shell 41 can be unlocked, and the upper shell 41 can be opened conveniently. Further, still include the torsional spring, this torsional spring wears to locate on the pivot, and then during the unblock of epitheca 41, this torsional spring can drive epitheca 41 and open automatically, and is very convenient.

In the utility model, the printing component 70 is provided with a printing unit which is movably connected with the mounting seat 47 and is provided with a transmission groove 71; the upper case 41 is further provided with a pushing block 41b, and the pushing block 41b can be in transmission fit with the transmission groove 71 to enable one end of the printing unit to move towards the direction close to or away from the paper feeding channel. The printing unit is used for printing contents on a sheet of paper, and has an end rotatably connected to the fixing plate 43. The pushing block 41b and the transmission groove 71 can be matched by adopting an inclined surface. When the upper case 41 is opened, the pushing block 41b is away from the transmission slot 71, and one end (i.e., the printing end) of the printing unit is driven away from the paper feeding passage 47a by the elastic member, and when the upper case 41 is closed, the pushing block 41b is inserted into the transmission slot 71, and the printing unit is driven to move toward the paper feeding passage 47a, i.e., to be attached to the paper.

The control main board 60 and the battery 50 are further provided, and are located at the bottom of the lower shell 42, that is, located at the other side of the fixing plate 43, the battery 50 is a rechargeable battery, such as a lithium battery, etc., the control main board 60 is further connected with a charging interface, the charging port 49 is correspondingly provided on the side wall of the lower shell, and the charging port 49 may also be located at other suitable positions of the upper shell 41 or the lower shell 42, without limitation, as required.

Also included is a paper guide 30 that is movable relative to the mounting block 47, the paper guide 30 being located in a different chamber than the cutter assembly 10. The paper feeding channel 47a is located between the cutter assembly 10 and the paper guide plate 30, the cutter assembly 10 is further provided with a transmission part, and the paper guide plate 30 is in transmission fit with the transmission part to act as paper clamping when the cutter assembly 10 presses paper.

Specifically, the cutter assembly 10 includes a cutter 11, an elastic element 12 and a paper pressing plate 13, wherein the cutter 11 is in sliding fit with the fixing plate 43 of the mounting seat 47; the paper pressing plate 13 is also in sliding fit with the cutter member 11 and the end thereof is opposite to the paper guide plate 30, i.e., a gap is formed between the paper guide plate 30 and the paper pressing plate 13. The cutter element 11 is provided with a slide block 11a at a side portion thereof, the fixing plate 43 is correspondingly provided with a slide groove 18, the slide block 11a is in sliding fit with the slide groove 18, and the extending direction of the slide groove 18 is the cutting direction of the cutter assembly 10. The cutter element 11 is in transmission connection with the key assembly 20, and the end part of the cutter element 11 is provided with a blade 14; the elastic member 12 is connected between the paper pressing plate 13 and the cutter member 11, and the elastic member 12 may be of a conventional elastic structure such as a spring.

Referring to fig. 8, in a conventional state, the end of the blade 14 is spaced from the end face of the paper pressing plate 13, or the end of the blade 14 is located above the end face of the paper pressing plate 13, when the key assembly 20 is pressed, the paper pressing plate 13 is pressed against the paper guide plate 30 to press paper, and then the cutter 11 continues to operate to press the elastic member 12, and the blade 14 operates to cut paper.

Further, the cutter 11 is provided with a first sliding slot 15, the first sliding slot 15 is opened towards one end of the paper guide 30, and the paper pressing plate 13 is slidably inserted through the first sliding slot 15. The first sliding slot 15 can play a guiding role to ensure that the paper pressing plate 13 slides more stably and reliably. The first sliding slot 15 may have two side walls and an inner wall, the two sides of the paper pressing plate 13 are in sliding fit with the two side walls, and the blade 14 may be mounted on the inner wall or at a suitable position on the outer wall of the first sliding slot 15, without limitation.

The transmission part 17 is arranged at one end of the paper pressing plate 13 close to the paper guide plate 30, and the transmission part 17 is also arranged at the side part of the paper guide plate 30, so that the paper pressing operation is prevented from being influenced. In this embodiment, the paper guide 30 is rotatably provided with a rotation shaft 31 and a protrusion 32, and the rotation shaft 31 is located at the middle position of the side portion of the paper guide 30 and is rotatably connected to the fixing plate 43. The protrusion 32 is located on the side of the paper guide 30 away from the blade 14, and may extend toward the paper pressing plate 13. The transmission part 17 is a pushing plate which is in abutting contact with the protrusion 32, when the paper pressing plate 13 moves to press paper, the pushing plate pushes the protrusion 32, so that the transmission part 17 rotates towards the paper pressing plate 13 on the side close to the blade 14 to clamp the paper, and the hanging length of the back of the paper near the blade 14 is reduced.

Further, referring to fig. 10, the paper guide 30 has a first curved surface 33 along the width direction of the paper, and the corresponding end of the cutter assembly 10 has a second curved surface 16, and the first curved surface 33 is matched with the second curved surface 16. The first arc-shaped surface 33 and the second arc-shaped surface 16 enable the paper to form an arc surface with better bending strength during paper clamping, and are beneficial to the next paper cutting operation.

The paper guide plate 30 of the present invention is provided with an elastic returning member 34 for driving the paper guide plate 30 to return, and the elastic returning member 34 is an elastic arm, a torsion spring, a spring, or the like, preferably, an elastic arm which abuts against a proper position below the paper guide plate 30. The number of the elastic arms may be one or two, preferably two, respectively located at both sides of the bottom surface of the paper guide 30. In order to limit the rotation angle of the paper guide 30, a stopper 37 may be provided at the bottom of the paper guide 30 on the side away from the blade 14.

Referring to fig. 5 to 7, the key assembly 20 is provided with a second key 21, a transmission rod 22 and a return member 25; the fixing plate 43 is provided with a second chute 23, and the second chute 23 forms an included angle with the paper cutting direction; the second button 21 is slidably disposed through the second sliding slot 23 and rotatably connected to one end of the transmission rod 22; the other end of the transmission rod 22 is rotatably connected with the cutter assembly 10; the return member 25 is connected to the second button 21 to urge the first button 48 back. The included angle between the second sliding chute 23 and the direction of the cutter can be selected within a large angle range, such as an obtuse angle or an acute angle, so that a more compact structural layout is easily realized, and the requirements of different pressing directions are met.

Further, the second key 21 includes a pressing portion 26 and a sliding portion 27, the pressing portion 26 is fixed on the top of the sliding portion 27, and the sliding portion 27 is in sliding fit with the second sliding groove 27. Specifically, the two second sliding grooves 23 are arranged left and right, and two opposite sides of the sliding portion 27 are respectively in sliding fit with the two second sliding grooves 23, so that when the pressing portion 26 is pressed, the sliding portion 27 can slide along the second sliding grooves 23.

Referring to fig. 5 and 6, the present invention further includes a connecting rod 24, one end of which is rotatably connected to the pressing portion 26 of the second button 21, and the other end of which is rotatably connected to the fixing plate 43. The connecting rod 24 and the transmission rod 22 are respectively located at two opposite sides, for example, the left side and the right side, of the second button 21, so that when the second button 21 slides, the force applied to the left side and the right side is more balanced, and the pressing is smoother.

Further, the return member 25 is a torsion spring or a spring for driving the second button 21 to return, and if the return member is a torsion spring, the other end of the connecting rod 24 can be sleeved with the return member and the first arm thereof is fixed, and the second arm is abutted to and contacted with the pressing portion 26 of the second button 21. When the second button 21 is released, the second arm drives the second button 21 to slide along the second sliding slot 23 to return. In the case of a spring, one end thereof is fixed and the other end thereof abuts against the bottom surface of the pressing portion 26.

In practical applications, the second button 21 can be mounted on the fixing plate 43, and its top surface can be located on the bottom surface or the side surface of the lower shell 42, and can even be located on the surface of the upper shell 41, preferably on the side surface of the lower shell 42.

In the present invention, the printing assembly 70 may include a printing unit, a paper feeding unit, and a driving unit for driving the printing unit and the paper feeding unit to operate, and the control main board 60 is connected to the printing unit and the driving unit to control the operation thereof. The paper in the paper receiving slot 46 is fed by the paper feeding unit, and the paper passes through the gap of the paper feeding path 47a and is discharged from the paper outlet 45, and the paper cutting principle is as follows:

when the second button 21 is manually pressed, the second button moves along the second chute 23 to drive the transmission rod 22 to move, the cutter 11 is pushed to move along the second chute 23, the second button 21 drives the transmission rod 22 to move, the cutter 11 is pushed, the cutter 11 drives the paper pressing plate 13 to press the paper guide plate 30, and meanwhile, the pushing plate of the transmission part 17 pushes the protrusion 32, so that one side, close to the blade 14, of the paper guide plate 30 rotates towards the blade 14 to clamp paper; thereafter, the cutting blade member 11 continues to operate to press the elastic member 12, and the blade 14 operates to cut the paper, see fig. 9. After the second push button 21 is released, the second push button 21 and the cutter member 11 return, and the paper guide plate 30 returns. When new roll paper is loaded, the upper case 41 is automatically opened by pressing the first button 48.

Example two

Referring to fig. 11, a compact portable printer has the same main structure as the first embodiment except that: the paper guide plate 30 is arranged to be liftable and provided with a first tooth portion 35; the transmission part 17 is provided with a second tooth part; a rotatable gear 36 is also included, the gear 36 meshing with the first and second teeth 35, 35.

Specifically, the gear 36 is rotatably mounted on the fixing plate 43 of the mounting seat 47, and the first teeth 35 are disposed inside the paper guide plate 30 and distributed along the longitudinal direction. The second teeth are located at one end of the platen 13 facing the gear 36 and are also longitudinally distributed. In order to ensure that the guide plate 30 is lifted and lowered more smoothly, a first tooth 35 and a gear 36 may be provided on both sides thereof, and the platen 13 may be provided with two second teeth correspondingly.

In this embodiment, the second tooth portion is moved by the action of the paper pressing plate 13, the gear 36 is driven to rotate, and the gear 36 rotates to drive the first tooth portion 35 to move, so that paper clamping is realized.

In this embodiment, the paper cutting principle is as follows:

when the second button 21 is manually pressed, the second button 21 drives the transmission rod 22 to act to push the cutter 11, the cutter 11 drives the paper pressing plate 13 to press the paper guide plate 30, and simultaneously drives the second tooth portion to move to drive the gear 36 to rotate, and the gear 36 drives the first tooth portion 35 to move to clamp paper; thereafter, the cutting blade 11 continues to operate to press the elastic member 12, and the blade 14 of the cutting blade 11 cuts the paper. After the second button 21 is released, the second button 21 returns, and the paper guide plate 30 returns.

The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.

Claims (10)

1. A compact portable printer comprising a housing, a printing assembly, a key assembly and a cutter assembly; the casing is equipped with exit slot, its characterized in that: the shell is provided with an upper shell, a lower shell and a mounting seat, wherein the upper shell and the lower shell are in rotatable connection and are provided with a buckle assembly to realize locking or unlocking; the mount pad is equipped with fixed plate and a plurality of closing caps, and this a plurality of closing caps are fixed in fixed plate one side in order to form a plurality of cavities and paper feed passageway, and printing subassembly and/or button cutter unit mount in one of them cavity and lie in paper feed passageway lateral part, still are formed with between these a plurality of closing caps periphery, fixed plate and the inferior valve inner wall and hold the paper groove in order to place the stock form.

2. A compact portable printer as in claim 1, wherein: the upper shell is provided with a buckling groove, the lower shell is provided with a first key, the first key is provided with a buckling strip, and the buckling strip can be buckled into or separated from the buckling groove to realize locking or unlocking; or the lower shell is provided with a rotating shaft, the upper shell is provided with a connecting part, and the connecting part is rotatably connected with the rotating shaft; the unlocking device further comprises a torsion spring, and the torsion spring penetrates through the rotating shaft to drive the upper shell to be opened when the unlocking is carried out.

3. A compact portable printer as in claim 1, wherein: the printing assembly is provided with a printing unit, and the printing unit is movably connected with the mounting seat and is provided with a transmission groove; the upper shell is also provided with a pushing block, and the pushing block can be in transmission fit with the transmission groove to enable one end of the printing unit to move towards the direction close to or far away from the paper feeding channel.

4. A compact portable printer as in claim 1, wherein: the battery and the control main board are fixed on the other side of the fixing plate.

5. A compact portable printer as in claim 1, wherein: the paper guide plate can move relative to the mounting seat; the paper guide plate is arranged on the paper guide plate, a gap for paper to pass through is arranged between the cutter assembly and the paper guide plate, the cutter assembly is further provided with a transmission part, and the paper guide plate is in transmission fit with the transmission part so as to move to clamp paper when the cutter assembly presses paper.

6. A compact portable printer as in claim 5, wherein: the paper guide plate is arranged to rotate relative to the mounting seat and is provided with a bulge; the transmission part is a pushing plate which is in abutting contact with the protrusion; or the paper guide plate is arranged to be capable of lifting relative to the mounting base and is provided with a first tooth part; the transmission part is provided with a second tooth part; the gear is meshed with the first tooth part and the second tooth part.

7. A compact portable printer as claimed in claim 5 or 6, wherein: the cutter component comprises a cutter element, an elastic element and a paper pressing plate; the cutter piece is in sliding fit with the mounting seat and is provided with a first chute, and an included angle is formed between the first chute and the paper cutting direction; the paper pressing plate is in sliding fit with the first sliding chute, and the end part of the paper pressing plate is opposite to the paper guide plate; the cutter piece is in transmission connection with the key assembly; the elastic member is connected between the paper pressing plate and the cutter member.

8. A compact portable printer as claimed in claim 5 or 6, wherein: the paper guide plate is provided with an elastic return piece which is an elastic arm or a torsion spring; or the paper guide plate is provided with a first arc-shaped surface along the width direction of the paper, the corresponding end of the cutter assembly is provided with a second arc-shaped surface, and the first arc-shaped surface is matched with the second arc-shaped surface.

9. A compact portable printer as in claim 1, wherein: the key assembly is provided with a second key, a transmission rod and a return piece; the mounting seat is provided with a second chute, and an included angle is formed between the second chute and the paper cutting direction; the second key is slidably arranged in the second sliding chute in a penetrating way and is rotatably connected with one end of the transmission rod; the other end of the transmission rod is rotatably connected with the cutter assembly; the reset piece is connected with the second key to drive the first key to reset.

10. A compact portable printer as in claim 9, wherein: the key assembly also comprises a connecting rod, one end of the connecting rod is rotatably connected with the second key, and the other end of the connecting rod is rotatably connected with the mounting seat; the transmission rod and the connecting rod are respectively positioned on two opposite sides of the second key.

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