CN209869733U

CN209869733U - Portable printer

Info

Publication number: CN209869733U
Application number: CN201822203392.8U
Authority: CN
Inventors: 不公告发明人
Original assignee: Xiamen Hanyin Electronic Technology Co Ltd
Current assignee: Xiamen Hanyin Electronic Technology Co Ltd
Priority date: 2018-10-31
Filing date: 2018-12-26
Publication date: 2019-12-31
Anticipated expiration: 2028-12-26
Also published as: CN111114146B; CN209514644U; CN209971904U; CN111114146A

Abstract

The utility model provides a portable printer contains: the printer comprises a shell with a paper storage cavity and a paper outlet channel, and a printing device arranged on the shell; the printing device comprises a printer core, and the printer core can drive printing paper to move outwards through the paper outlet channel; the housing includes: the printing device comprises a casing main body and a cover body, wherein the casing main body is provided with the printing device, and the cover body is matched with the casing main body to form the paper storage cavity and the paper outlet channel; the cover body can move relative to the machine shell main body so as to switch between a first position for covering the paper storage cavity and a second position for exposing the paper storage cavity; one of the machine shell main body and the cover body is provided with a first convex part, and the other of the machine shell main body and the cover body is provided with a first groove part matched with the first convex part; the first convex part is embedded into the first groove part when the cover body covers the paper storage cavity. The cover body and the machine shell main body can be matched closely.

Description

Portable printer

Technical Field

The utility model relates to a printing apparatus specifically relates to a portable printer.

Background

A portable printer generally includes a casing generally divided into a casing main body and a cover movable relative to the casing main body to open and close the cover of a paper storage chamber, and a printing apparatus. Portable printers may be used in different positions, such as supermarket cashier hand-held printers, which the cashier may use, place, and place in an up or down position. How to ensure that the cover body can be arranged on the main body of the cabinet tightly in use is a design point of the portable printer, and the prior art lacks a technical improvement on the aspect. In view of this, the present application is specifically made.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a portable printer is provided, its apron can comparatively fasten the ground configuration in the printer main part.

In order to solve the above technical problem, the utility model provides a portable printer contains: the printer comprises a shell with a paper storage cavity and a paper outlet channel, and a printing device arranged on the shell; the printing device comprises a printer core, and the printer core can drive printing paper to move outwards through the paper outlet channel; the housing includes: the printing device comprises a casing main body and a cover body, wherein the casing main body is provided with the printing device, and the cover body is matched with the casing main body to form the paper storage cavity and the paper outlet channel; the cover body can move relative to the machine shell main body so as to switch between a first position for covering the paper storage cavity and a second position for exposing the paper storage cavity; one of the machine shell main body and the cover body is provided with a first convex part, and the other of the machine shell main body and the cover body is provided with a first groove part matched with the first convex part; the first convex part is embedded into the first groove part when the cover body covers the paper storage cavity. The printing paper may be a conventional label paper or a paper without a peelable label for a POS machine.

Preferably, the casing main body comprises a first casing part and a second casing part which are oppositely arranged up and down, and the first casing part and the second casing part are matched to form a paper storage cavity and a paper outlet channel; one of the second case portion and the cover has the first protrusion, and the other of the second case portion and the cover has the first groove portion; one of the first shell part and the cover body is provided with a second convex part, and the other of the first shell part and the cover body is provided with a second groove part matched with the second convex part; the second convex part is embedded into the second groove part when the cover body covers the paper storage cavity.

Preferably, the paper outlet of the paper outlet channel is located at the front end of the casing main body, and the cover is configured at the side of the casing main body.

Preferably, the cover body is hinged to the casing main body and is switched between the first position and the second position in a manner of being vertically hinged to the casing main body.

Preferably, the casing comprises a cover switch, and the cover switch can move relative to the casing main body to switch between a fifth position and a sixth position; when the cover body switch is in the fifth position, the cover body is limited to move from the first position to the second position, and when the cover body switch is in the sixth position, the cover body is not limited to move from the first position to the second position.

Preferably, the casing main body comprises a movement bracket configured with a printer movement; the printer core includes: paper guide roller, heat sensitive assembly and elastic part between the core support and the heat sensitive assembly; the heat-sensitive component can approach and depart from the paper guide roller in a rotating mode relative to the movement bracket; the elastic piece is correspondingly switched between a stretching state and a retracting state when the thermosensitive assembly is close to or far away from the paper guide roller; the cover body switch is connected to the rotating piece; the rotating part is rotatably supported on the machine core bracket, and the rotating axis of the rotating part is parallel to the rotating axis of the thermosensitive assembly; the rotating part is provided with a first pressure surface and a second pressure surface which are used for pressing the thermosensitive assembly, and the distance between the first pressure surface and the rotating axis of the rotating part is greater than the distance between the second pressure surface and the rotating axis of the rotating part; when the cover body switch is switched between the fifth position and the sixth position, the rotating piece is correspondingly driven to be switched between the states of pressing the thermosensitive assembly through the first pressing surface and pressing the thermosensitive assembly through the second pressing surface.

Preferably, the printer comprises: a code scanning device and a code scanning control switch which are arranged on the machine shell main body; and the control device for controlling the work of the printer core is connected with the code scanning device and the code scanning control switch.

By adopting the technical scheme, the utility model discloses can gain following technological effect:

1. according to the scheme, the convex part is arranged on one of the casing main body and the cover body, the concave part is arranged on the other of the casing main body and the cover body, and when the cover body covers the paper storage cavity, the convex part is embedded into the corresponding concave part, so that the cover body and the casing main body can be tightly matched and are not easy to separate when in use; the printer provided by the application can be applied to printers applying common label paper, such as a handheld POS printer or a supermarket cashier printer, and can be applied to printers applying label paper, such as a handheld logistics printer;

2. the cover body switch is arranged to control whether the cover body can move relative to the main body of the machine shell, and when the cover body covers the paper storage cavity, the cover body switch can ensure that the cover body is tightly matched with the main body of the machine shell;

3. under the condition that the casing main body comprises a first casing part and a second casing part which are oppositely arranged up and down and are matched with each other to form a paper storage cavity and a paper outlet channel, when the printing paper is jammed in the paper outlet channel, a user can open the cover body and apply force to the first casing part and the second casing part to enable the side parts of the first casing part and the second casing part to be relatively far away so as to slightly increase the size of the paper outlet channel, and then the jammed paper can be conveniently taken out; when the paperboard is taken out and the cover body is closed, the first convex part and the second convex part are correspondingly embedded in the first groove part and the second groove part respectively, and the first shell part and the second shell part are in a normal matching state; the casing main part adopts above-mentioned design, is favorable to taking out the card paper, and can not influence the normal work of product.

Drawings

Fig. 1 is a diagram illustrating a change of operating status of a printer according to an embodiment of the present invention during a printing operation;

fig. 2 is a schematic diagram of a printer according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a printer according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating a state change of the cover and the paper guide assembly of the printer according to an embodiment of the present invention;

fig. 5 and 6 are schematic diagrams respectively illustrating a printer according to an embodiment of the present invention in a first disassembled state at different viewing angles;

fig. 7 and 8 are schematic diagrams respectively illustrating the printer of an embodiment of the present invention in a second disassembled state at different viewing angles;

FIG. 9 is a schematic view of a paper guide assembly according to an embodiment of the present invention;

FIG. 10 is a schematic view of a first carriage configured with a first detection mechanism;

FIGS. 11 and 12 are schematic views respectively illustrating the lower housing portion configured with the second detecting mechanism at different viewing angles;

FIG. 13 is a schematic view showing the relative positions of the first shell portion, the spacer and the roll paper support bar;

FIG. 14 is a schematic view showing the variation of the movement of the thermal sensitive member with respect to the paper guide roller when the cover switch is switched;

FIG. 15 shows a schematic representation of a variation corresponding to the cross-sectional view in FIG. 14;

fig. 16 shows a schematic view of a variation of the driving roller corresponding to fig. 14.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Referring to fig. 1, in an embodiment, the portable printer of the present invention is a handheld printer, and as shown in the figure, the housing 1 has a portion for being held by a hand of a user. The printer shown in fig. 1 can be used for printing express label paper, when in use, a user firstly presses the code scanning control switch 17 on the housing 1, then the code scanning device 13 arranged on the housing reads two-dimensional code information, a printer core of the printer prints corresponding information on a label part M2 of the label paper according to the read two-dimensional code information, and a stripping mechanism of the printer further completes the operation of separating a backing paper part M1 and a label part M2 of the label paper. The mount section M1 is generally provided with a plurality of label sections M2 arranged at intervals. The non-printing side of label portion M2 has an adhesive, and after printing, the user can adhere label portion M2 to the item and further apply pressure to the label portion adhered to the item via pressure roller 16 rotatably disposed on the housing. The specific structure of the printer of fig. 1 will be further described below. In another embodiment, when the printer is a POS machine or a supermarket cashier printer, the printing paper may not be label paper, but may be a common paper tape.

Referring to fig. 2 to 8, in this embodiment, the printer includes: the printer comprises a shell 1, a printing device, a code scanning device 13, a pressure applying roller 16, a code scanning control switch 17, a control device 14 and an operation panel 15, wherein the printing device comprises a printer core 11 and a stripping mechanism 12. The peeling mechanism 12 includes a paper guide 18 and a peeling roller 19. The user controls the on/off of the printer through the operation panel 15.

The specific structure of the housing 1 will be described first, and the arrangement relationship of the other structures and the housing 1 will be described simultaneously.

Referring to fig. 3 and 4, the casing 1 has a paper storage chamber S1 and a paper discharge path S2. The sheet discharge port of the sheet discharge path S2 is located on the front side of the casing 1. Referring to fig. 5 and 6, the housing 1 includes a first housing portion 7, a second housing portion 3, a third housing portion 2, a fourth housing portion 4, a cover 5, a cover switch 6, and a fifth housing portion 8. Wherein, the first housing part 7, the second housing part 3, the third housing part 2, the fourth housing part 4 and the fifth housing part 8 are matched to form a housing main body. The first, second and fifth casing portions 7, 3, 8 cooperate to form a cartridge bay for supporting a printer cartridge 11. The first bracket 20 is disposed on the fifth casing 8 and serves as a rotation bracket for the paper guide 18. Referring to fig. 3, since the first holder 20 is disposed on the fifth casing portion 8 of the deck chassis, the paper guide 18 is movable relative to the casing main body to switch between a third position where the casing main body defines the interleaving paper path S3 and a fourth position where the interleaving paper path S3 is exposed.

The first shell part 7 and the second shell part 3 are arranged oppositely up and down and respectively have cambered surface-shaped structures so as to form a cylindrical paper storage cavity S1 and a paper outlet channel S2 in a matching manner, and the fifth shell part 8 is positioned at the right side of the paper storage cavity S1. Referring to fig. 13, the spacer 9 is disposed in the paper storage cavity S1, and the space of the paper storage cavity S1 for accommodating roll paper can be controlled by moving the spacer 9 axially relative to the paper storage cavity S1, so as to accommodate roll paper of different sizes (e.g. 2 inches of label paper or 3 inches of label paper). Specifically, the first casing 7 is provided with a plurality of screw through holes 7A, and the screw through holes are located at different cross-sectional positions along the axial direction, and the outer periphery of the spacer 9 is provided with corresponding screw mounting holes (not shown), and the screw mounting holes and the screw through holes on the spacer 9 are made to correspond to each other by moving the spacer 9 to the corresponding screw through holes 7A along the axial direction, and then the space for accommodating the roll paper is configured by fastening the screw. The control device 14 is disposed on the upper side of the first casing 7, and the operation panel 15 is disposed on the rear side of the first casing 7. The code scanning device 13 is supported on the upper side of the first shell part 7 through a second bracket 26. Referring to fig. 7 and 8, the printer core 11 and the peeling mechanism 12 are disposed on the first casing section 7 and the second casing section 3 which are disposed to face each other in the vertical direction.

The spacer 9 is disposed between the first case portion 7 and the second case portion 3. A roll paper support bar 10 is mounted on the fifth casing portion 8, passes through the spacer 9 and is located within the paper storage chamber S1 so as to support the label paper M in a roll shape. It will be appreciated that the coiled brace 10 is not a required component and may be omitted in alternative embodiments.

The fourth shell part 4 and the third shell part 2 are oppositely arranged at the left and the right and are matched to form an accommodating space, and a machine core bracket and a code scanning device 13 formed by the first shell part 7, the second shell part 3 and the fifth shell part 8 are positioned in the accommodating space. Meanwhile, the third housing part 2 and the fourth housing part 4 are cooperatively formed with a grip portion to be gripped by a user, and a code scanning control switch 17 is located on the grip portion, as shown in fig. 6, a portion 2A of the third housing part 2 and a portion 4A of the fourth housing part 4 are spliced to form the grip portion. The grip portion for the user to hold is a hollow structure in which the battery module 29 is disposed.

The paper outlet of the paper outlet channel S2 is located at the front side of the machine shell main body, the cover 5 is configured at the left side of the machine shell main body, and the cover 5 and the machine shell main body are matched to form a paper storage cavity S1 and a paper outlet channel S2. The fourth casing portion 4 exposes a side of the paper storage cavity S1, and the cover 5 is hinged to the fourth casing portion 4 of the cabinet main body. Referring to fig. 4, the cover 5 is capable of being switched between a first position covering the paper storage chamber S1 and a second position exposing the paper storage chamber S1 by being hinged up and down relative to the fourth casing portion 4 of the casing main body. As shown in fig. 4, the second housing part 3 of the cabinet main body has a first protrusion K1, and the cover 5 has a first groove portion L1 fitted with the first protrusion K1; meanwhile, the cover 5 has a second protrusion K2, and the first housing portion 7 of the cabinet body has a second groove portion L2 fitted with the second protrusion K2. When the cover 5 is rotated to cover the paper storage chamber S1, the first projection K1 is fitted into the first groove portion L1, and the second projection K2 is fitted into the second groove portion L2, by which the cover 5 and the cabinet main body can be closely fitted. It is to be readily understood that the specific arrangement of the two convex portions and the two groove portions is not limited to the above. When the label paper is stuck in the paper outlet channel, a user can open the cover body and apply force to the first shell part 7 and the second shell part 3 to enable the side parts of the first shell part and the second shell part to be relatively far away so as to slightly increase the size of the paper outlet channel, and then the paper jam can be conveniently taken out; when the paperboard is taken out and the cover body is closed, the first convex part and the second convex part are correspondingly embedded in the first groove part and the second groove part respectively, and at the moment, the first shell part and the second shell part are in a normal matching state. The casing main part adopts above-mentioned design, is favorable to taking out the card paper, and can not influence the normal work of product.

Referring to fig. 3 to 6, peeling mechanism 12 includes a paper guide member 18 and a peeling pressing roller 19, and peeling pressing roller 19 is capable of applying an oblique force to label paper M and pulling back paper portion M1 in cooperation with paper guide member 18, so that peeling mechanism 12 is capable of separating back paper portion M1 and label portion M2 of label paper M when label paper M moves outward through paper discharge path S2. Referring to fig. 5, in the present embodiment, the paper guide assembly 18 is hinged to the first carriage 20, and is switched between a third position where the mount case body defines the interleaving paper path S3 and a fourth position where the interleaving paper path S3 is exposed, by being hinged to the printer core 11 in a left-right direction. The cover 5 has a restriction portion 5A, the restriction portion 5A restricts the paper guide 18 from being switched to the fourth position when the cover 5 is at the first position and the paper guide 18 is at the third position, and the restriction portion 5A does not restrict the paper guide 18 from being switched to the fourth position when the cover 5 is at the second position and the paper guide 18 is at the third position.

Referring to fig. 4, the cover switch 6 is capable of hinge-moving clockwise and counterclockwise with respect to the casing main body to switch between a fifth position and a sixth position. When the cover switch 6 is in the fifth position, the cover 5 is restricted from moving from the first position to the second position, and when the cover switch 6 is in the sixth position, the cover 5 is not restricted from moving from the first position to the second position.

The specific structure of the printer core 11 will be further described below. With reference to fig. 5 to 8, the printer core 11 of the present embodiment includes: a paper guide roller 21 and a heat-sensitive component 22, an elastic member 23 arranged between the first shell part 7 and the heat-sensitive component 22, and a gear transmission component 24 for driving the paper guide roller 21 to rotate. The components of the printer core 11 are arranged on a core bracket formed by matching the first shell part 7, the second shell part 3 and the fifth shell part. Specifically, one side of the paper guide roller 21 is supported on the fifth casing portion 8, and the other side of the paper guide roller 21 is supported on the second casing portion 3. One side of the thermosensitive assembly 22 is supported on the fifth shell portion 8, and the other side of the thermosensitive assembly 22 is supported on the first shell portion 7. Referring to fig. 14 to 16, the thermal module 22 is hingedly movable to approach and separate from the sheet guide roller 21. The cover switch 6 is connected to the rotating member 30, and when the cover switch 6 is switched between the fifth position and the sixth position, the rotating member 30 and the elastic member 23 cooperate to drive the thermal sensitive component 22 to correspondingly switch between the positions close to and far from the paper guide roller 21. The elastic deformation of the elastic member 23 brings the thermosensitive member 22 away from the paper guide roller 21. The elastic element 23 is a tension spring, the upper end of which is hooked on the first casing 7, and the lower end of which is hooked on the thermal head holder of the thermal element 22, i.e. the elastic element 23 is arranged between the core holder and the thermal element. The rotation member 30 is supported on one side on the fifth casing portion 8 and on the other side on the first casing portion 7. The rotation axis of the rotation member 30 is parallel to the rotation axis of the heat sensitive member. The rotating member 30 has a first pressing surface 30A and a second pressing surface 30B. When the cover switch 6 is in the fifth position, the elastic element 23 is in a stretched state, and the rotating element 30 presses the thermosensitive assembly 22 through the first pressing surface 30A; when the cover switch 6 rotates counterclockwise to the sixth position, the elastic member 23 retracts from the stretched state, and the rotating member 30 presses the thermal element 22 through the second pressing surface 30B. The distance between the first pressing surface 30A and the rotation axis of the rotation member 30 is greater than the distance between the second pressing surface 30B and the rotation axis of the rotation member 30, and further when the cover switch 6 drives the rotation member 30 to rotate, the surface of the rotation member 30 pressing the heat sensitive element 22 is switched from the first pressing surface 30A to the second pressing surface 30B, and the elastic element 23 is synchronously gradually retracted from the stretching state and pulls the heat sensitive element 22 away from the paper guide roller 21. The specific principle of the proximity of the thermal element 22 to the paper guide roller 21 can be understood by referring to the above description, and the detailed description is omitted. The printer core 11 further includes a driving motor for driving the gear transmission assembly 24 to rotate, as shown in fig. 6, the driving motor is disposed on the fifth casing portion 8, and the driving motor is electrically connected to the control device 14. The paper guide roller 21 rotates to drive the label paper M to move outward along the paper output path S2. When the thermal element 22 approaches the paper guide roller 21, the two cooperate to complete the print job. Referring to fig. 8, the gear assembly 24 is disposed on the fifth housing portion 8 and includes a first transmission gear 24A, and the first bracket 20 has hinge slots opposite to each other in the up-down direction. The upper and lower ends of the right side of the paper guide 18 are hinged in the hinge groove of the first bracket 20, and the paper guide 18 has a relief groove 18A adapted to the first transmission gear 24A. The design of the abdicating groove 18A can avoid the interference between the paper guide component 18 and the first transmission gear 24A when rotating, and meanwhile, the design of the abdicating groove 18A enables the whole structure to be compact.

The specific structure of the peeling mechanism 12 will be further described below. The peeling mechanism 12 includes a paper guide 18 and a peeling roller 19. The peeling platen roller 19 is disposed on one side of the fifth casing portion 8 and on the other side of the second casing portion 3. As shown in fig. 9, the paper guide unit 18 includes a paper guide unit main body 18A and a driven roller 18B disposed on the paper guide unit main body. The upper end of the paper guide body 18A has a plurality of spaced raised edges for guiding the label portion M2 of the label paper M, and the spaced raised edges prevent the label portion M2 from sticking to the paper guide body 18A. The lower end of the paper guide assembly body 18A has uneven teeth, and when the backing paper portion M1 of the label paper M is too long, the user pulls the backing paper portion M1 so that the teeth press the backing paper portion M1 to cut off the too long backing paper portion M1. The driven roller 18B is located inside the paper guide main body 18A, which is located inside the interleaving paper passage S3 when the paper guide 18 defines the interleaving paper passage S3 in cooperation with the chassis main body. The driven roller 18B is used to cooperate with the peeling roller 19 and the paper guide roller 21 to operate, and specifically, when the paper guide roller 21 is driven to drive the label paper M to move outward, the driven roller 18B is driven to rotate by the backing paper portion M1 of the label paper M, so that the backing paper portion M1 can move along the backing paper path S. The application of the peeling mechanism to a printer for printing label paper is a common technology, and corresponding disclosures are provided in patent applications CN100469658C and CN105383193A, and other contents not mentioned in the present application can be referred to corresponding patent applications for understanding assistance.

Referring to fig. 10, the second holder 26 has a configuration groove portion 26A of the code scanner 13 and a first light passing hole 26B. The first detecting mechanism 25 is disposed on the second support 26, and is a photoelectric detecting mechanism, which can emit light through the first light passing hole 26B to irradiate the label paper M, so as to determine the traveling amount of the label paper M, and thus control the printer core to print on each label portion. The specific principle of the printer core controlling the label portions of the label paper M to be printed one by one according to the detection information of the first detection mechanism 25 is known in the art, and therefore, the detailed description thereof is omitted.

Referring to fig. 11 and 12, the second housing portion 3 has a second light passing hole 3A, and the second housing portion 3 is configured with a first detecting mechanism 27, which is also a photoelectric detecting mechanism, and can emit light through the second light passing hole 3A to irradiate the label paper M so as to determine the traveling amount of the label paper M.

It should be noted that, in the drawings, for convenience of illustration, connection wires for electrically connecting the first detecting mechanism, the second detecting mechanism, the code scanning control switch, the code scanning device, the battery module and other mechanisms to the control device are not shown.

It is to be understood that the specific embodiments are not limited to the above-described embodiments under the inventive concept of the present application. In another embodiment, the pressure applying roller 16 may be omitted or the position of the pressure applying roller 16 may be adjusted according to product needs. In another embodiment, only one detection mechanism may be included. In another embodiment, the cover switch 6 may be omitted and a matching manner between the cover and the housing main body may be additionally provided, for example, the cover controls the opening and closing of the paper storage cavity by sliding relative to the housing main body, the cover and the housing main body are matched by interference fit, and the cover can slide relative to the housing main body only when a certain external force is applied. Different from the scheme that the cover body is arranged on the right side of the machine shell main body. In another embodiment, the cover may also be disposed on the right side of the main body of the housing, and the disposition of the printer core and the peeling mechanism may be adjusted correspondingly. In another embodiment, the paper guide assembly may be directly disposed on the casing main body, instead of indirectly disposing the paper guide assembly on the core support of the casing main body through the first support. Different from the hinged mode for configuring the cover body and the paper guide assembly, the cover body and the paper guide assembly can also be movably configured in other modes as long as the cover body and the paper guide assembly can be switched at different positions.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable printer, comprising: a casing (1) having a paper storage chamber (S1) and a paper discharge path (S2), a printing device disposed on the casing (1); the printing device comprises a printer core (11), wherein the printer core (11) can drive printing paper (M) to move outwards through a paper outlet channel (S2); it is characterized in that the preparation method is characterized in that,

the cabinet (1) comprises: a casing main body provided with the printing device, and a cover body (5) which is matched with the casing main body to form the paper storage cavity (S1) and the paper outlet channel (S2);

the cover body (5) can move relative to the machine shell main body so as to switch between a first position for covering the paper storage cavity (S1) and a second position for exposing the paper storage cavity (S1);

one of the cabinet main body and the cover body is provided with a first convex part (K1), and the other of the cabinet main body and the cover body is provided with a first groove part (L1) matched with the first convex part (K1); the first protrusion (K1) is fitted into the first groove portion (L1) when the cover (5) covers the paper storage chamber (S1).

2. The printer according to claim 1, wherein the cabinet body comprises a first casing portion (7) and a second casing portion (3) disposed opposite to each other in an up-down direction, which cooperate to form a paper storage chamber (S1) and a paper discharge passage (S2); one of the second case portion (3) and the cover (5) has the first protrusion (K1), and the other of the second case portion (3) and the cover (5) has the first groove portion (L1); one of the first shell part (7) and the cover body (5) is provided with a second convex part (K2), and the other one of the first shell part (7) and the cover body (5) is provided with a second groove part (L2) matched with the second convex part (K2); the second convex portion (K2) is fitted into the second groove portion (L2) when the cover (5) covers the paper storage chamber (S1).

3. The printer according to claim 1, wherein the sheet discharge port of the sheet discharge path (S2) is located at a front end of the main body of the housing, and the cover (5) is provided at a side of the main body of the housing.

4. Printer according to claim 3 wherein said cover (5) is hinged to the main body of the cabinet and is switchable between the first position and the second position by means of a vertical hinge movement with respect to the main body of the cabinet.

5. Printer according to anyone of claims 1 to 4 wherein said cabinet (1) comprises a cover switch (6), the cover switch (6) being movable with respect to the cabinet body to switch between a fifth position and a sixth position; when the cover body switch (6) is located at the fifth position, the cover body (5) is limited to move from the first position to the second position, and when the cover body switch (6) is located at the sixth position, the cover body (5) is not limited to move from the first position to the second position.

6. The printer according to claim 5, wherein the housing main body includes a cartridge holder that configures the printer cartridge; the printer cartridge (11) comprises: a paper guide roller (21) arranged on the movement bracket, a heat-sensitive component (22) and an elastic piece (23) arranged between the movement bracket and the heat-sensitive component (22); the heat-sensitive component (22) can approach and depart from the paper guide roller (21) in a manner of rotating relative to the movement bracket; the elastic piece (23) is correspondingly switched between a stretching state and a retracting state when the heat-sensitive component (22) approaches to and departs from the paper guide roller (21); the cover body switch (6) is connected to the rotating piece (30); the rotating part (30) is rotatably supported on the movement bracket, and the rotating axis of the rotating part is parallel to the rotating axis of the heat-sensitive component (22); the rotating member (30) is provided with a first pressure surface (30A) and a second pressure surface (30B) which are used for pressing the heat-sensitive component (22), and the distance between the first pressure surface (30A) and the rotating axis of the rotating member (30) is larger than the distance between the second pressure surface (30B) and the rotating axis of the rotating member (30); when the cover body switch (6) is switched between the fifth position and the sixth position, the rotating piece (30) is correspondingly driven to switch between the states of pressing the thermosensitive assembly (22) through the first pressing surface (30A) and pressing the thermosensitive assembly (22) through the second pressing surface (30B).

7. The printer according to claim 1, comprising: a code scanning device (13) and a code scanning control switch (17) which are arranged on the machine shell main body; and a control device (14) for controlling the operation of the printer core (11) is connected with the code scanning device (13) and the code scanning control switch (17).