CN114872448B

CN114872448B - Portable printer

Info

Publication number: CN114872448B
Application number: CN202210438959.8A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Xiamen Hanyin Electronic Technology Co Ltd
Current assignee: Xiamen Hanyin Electronic Technology Co Ltd
Priority date: 2021-04-22
Filing date: 2022-04-21
Publication date: 2023-10-10
Anticipated expiration: 2042-04-21
Also published as: CN217705201U; CN217705205U; CN114872448A; CN217705202U; CN217705203U; CN217705204U

Abstract

The application provides a portable printer, which comprises a base body and a cover body covering the top of the base body; a print head arranged in a vertical direction and a platen roller opposite to the print head are arranged in the base, and the platen roller rotates around a first axis; the platen roller feeds out the recording paper by rotating in a state in which the recording paper is sandwiched between the platen roller and the print head; an actuating lever which is arranged in the base and drives the printing head to approach or separate from the platen roller in response to the opening and closing action of the cover body; wherein the actuating lever is configured to swing about a second axis parallel to the first axis, and the actuating lever has a mounting portion adapted to mount a printhead and a driving portion adapted to be driven by a cover; the cover body is provided with an abutting part which can abut against the cover body driving part to drive the actuating rod to swing. The application has the beneficial effects of compact structure, high assembly efficiency and easy carrying.

Description

Portable printer

Technical Field

The application relates to the field of printers, in particular to a portable printer which is compact in structure and small in size.

Background

Along with the improvement of living standard, people pursue the quality of life and the convenience degree of life more and more, the label printer which can improve the quality of life and enable life to be more convenient has also appeared in the market correspondingly, and the label printer not only can print out characters, but also can print figures and photos. The name and the shelf life of the article can be printed in life, so that a user can find the article more quickly and remind the user of the shelf life of the article to finish the use in the shelf life, and the article is prevented from being out of date after long-term unused. The method can be used for printing the wrong questions of the students on the study, helping the students to build the wrong question set, quickly recording the wrong questions, reducing the time of the students to copy and write the wrong question set, striving more study time for the students and improving the study efficiency.

However, the existing portable printer has a large size and is not convenient to carry in a pocket, and in order to further reduce the size, the inventor applies for a chinese patent with the publication number CN212171705U, named "a mini label printer". However, the internal structure of the patent is complex, the assembly is difficult, the production cost is extremely high, and the product competitiveness is insufficient. It is therefore highly desirable to provide a portable micro printer that is compact and has a simple internal structure and is easy to assemble.

Disclosure of Invention

The technical problem to be solved by the application is to overcome the defects of the prior art, and provide a portable miniature printer which has compact structure, simple internal structure and easy assembly.

In order to achieve the above purpose, the technical scheme adopted by the application is as follows:

a portable printer comprises a base and a cover body covering the top of the base; the base is provided with: a print head arranged in a vertical direction; and a platen roller opposite the printhead, the platen roller rotating about a first axis; the platen roller feeds out the recording paper by rotating in a state in which the recording paper is sandwiched between the platen roller and the print head; the base is also provided with an actuating rod for driving the printing head to approach or depart from the platen roller in response to the opening and closing action of the cover body; wherein the actuating lever is configured to swing about a second axis parallel to the first axis, and the actuating lever has a mounting portion adapted to mount a printhead and a driving portion adapted to be driven by a cover; the cover body is provided with an abutting part which can abut against the driving part to drive the actuating rod to swing.

The technical scheme can be further perfected as follows:

preferably, when the cover body is closed, the abutting part abuts against the driving part to drive the actuating rod to swing, and the printing head is close to the platen roller in the swinging process of the actuating rod.

Preferably, a biasing member is disposed between the actuator lever and the housing, and the biasing member is configured to bias the actuator lever in a direction in which the printhead is away from the platen roller. When the cover body is opened, the abutting part releases the driving part, the force application piece drives the actuating rod to swing, and the printing head is far away from the platen roller in the swinging process of the actuating rod. The seat body is provided with a pivot shaft extending along the second axis, the actuating rod is provided with a pivot hole, and the pivot hole is matched with the pivot shaft so that the actuating rod is pivotally connected to the seat body. The force application member is a torsion spring arranged on the pivot shaft, and at least one leg of the torsion spring is connected to the actuating rod to apply force to the actuating rod.

Preferably, the mounting portion has a mounting cavity formed therein, and the print head is disposed in the mounting cavity.

Preferably, an elastic member for pressing the print head is provided in the mounting portion, and the elastic member applies force to the print head toward the direction in which the print head approaches the platen roller, so that a gap between the print head and the platen roller can be adapted to the thickness of the recording paper when the print head is pressed against the platen roller. The printing head is connected with the mounting part through a sliding structure, and the sliding structure comprises sliding blocks arranged on the left side and the right side of the printing head and sliding grooves arranged on the left side and the right side of the mounting part. The bottom wall of the mounting part is provided with a limit protrusion for supporting the printing head and limiting the position of the printing head.

Preferably, the abutting portion is formed by extending downward from a lower side surface of the cover, and the driving portion and the mounting portion are disposed on different sides of the actuating lever. The cover body is provided with a rotating part, the cover body is pivotally connected to the base body through the rotating part, and the abutting part is formed on the rotating part. The driving part is arranged as a bump which is matched with the abutting part, and the seat body is provided with a window which is used for the driving part to extend out to be abutted by the abutting part.

Preferably, the actuating lever is slightly V-shaped with an opening facing away from the platen roller. The paper roll driving device is arranged in the base and used for driving the paper roll to rotate, the paper roll driving device comprises a driving motor and a transmission mechanism, the driving motor is arranged on one side of an opening of the actuating rod, and the central axis of the driving motor is parallel to the second axis. And the inside of the base is provided with a lining plate perpendicular to the second axis, and the driving motor and the transmission mechanism are respectively arranged at the upper side and the lower side of the lining plate. A first housing is arranged in the base, a first cavity is formed between the first housing and the inner lining plate, and the driving motor and the actuating rod are both arranged in the first cavity.

Preferably, a second housing is installed in the base, a second chamber is formed between the second housing and the inner liner, the platen roller is disposed in the second chamber, and both end portions of the platen roller are rotatably coupled to the second housing and the inner liner, respectively. A sinking groove is arranged on the inner lining plate in the swinging area of the printing head so as to increase the accommodation height in the vertical direction in the swinging area of the printing head.

Preferably, the first cover is formed with an upper convex groove protruding upward in the print head swing area, so as to increase the accommodation height in the vertical direction in the print head swing area.

Preferably, a first cover and a second cover are installed in the base, the actuating rod is arranged in the first cover, the paper pressing roller is arranged in the second cover, and a paper feeding gap for paper feeding is formed between the first cover and the second cover. The base has a housing for forming a bottom wall and side walls thereof, and the side walls of the first housing, the second housing, and the housing collectively enclose a paper compartment for mounting a recording paper roll. The inner lining plate is arranged in the base body, a third cavity is formed between the inner lining plate and the bottom wall of the shell, and a battery is arranged in the third cavity. The battery is a rechargeable battery, a circuit board is arranged in the third chamber, and a partition board is arranged between the circuit board and the battery. The cover body comprises an inner cover and an outer cover, and a limiting part for limiting upward movement of the recording paper roll is arranged on the inner cover.

Due to the adoption of the technical scheme, the application has the following beneficial effects:

in the cover closing process, the cover body directly drives the actuating rod to swing, so that the printing head is close to the paper pressing roller. During the uncapping process, the cover gradually releases the actuator lever, thereby moving the printhead away from the platen roller. The miniature printer has the advantages of small volume, portability, reasonable internal structure layout, compact structure and easy assembly, remarkably improves the production efficiency and reduces the failure rate. Compared with the structure in the prior art, the transmission structure is fewer, so that the occupied space is smaller, the transmission is more stable, and the failure rate is low.

In addition, the paper bin is formed by enclosing the shell and the two shells, has larger volume, can be used for placing more recording paper, prolongs the period of replacing the recording paper by a user, and saves the use cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following brief description of the drawings of the embodiments will make it apparent that the drawings in the following description relate only to some embodiments of the present application and are not limiting of the present application.

Fig. 1 is a schematic diagram showing a closed cover state of a portable printer according to the first embodiment.

Fig. 2 is a schematic diagram of an uncapped state of the portable printer in the first embodiment.

Fig. 3 is a cross-sectional view of a portable printer in the first embodiment.

Fig. 4 is a structural view of the base in the first embodiment.

Fig. 5 is an exploded view of the housing in the first embodiment.

Fig. 6 is an internal structure view of the base in the first embodiment.

Fig. 7 is an assembled view of the actuator lever and printhead of the first embodiment.

Fig. 8 is a second assembled view of the actuator lever and printhead of the first embodiment.

FIG. 9 is a structural view of a cover in the first embodiment;

FIG. 10 is an exploded view of the liner plate and the seat body of the first embodiment;

fig. 11 is an exploded view of the actuating rod and the interior lining in the first embodiment.

Reference numerals:

1. a cover body; 101. an inner cover; 101a, an abutting part; 101b, a limiting part; 102. an outer cover; 2. a base; 201. a first housing; 201a, windows, 201b, upper convex grooves, 202, second cover shells; 203. a housing; 203a, guiding limiting plates 204, paper bins; 205. an inner liner; 205a, a notch groove, 205b, a sinking groove, 206; 207. a circuit board; 208. a partition plate; 209. a platen roller; 210. a motor; 211. a transmission mechanism; 212. a force application member; 213. a pin joint shaft; 4. an actuating lever; 401. a driving section; 5. a print head; 6. an elastic member.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Unless defined otherwise, technical or scientific terms used in this patent document should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a," "an," or "the" and similar terms do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used merely to denote relative positional relationships, which may be changed accordingly when the absolute position of the object being described is changed, merely to facilitate description of the present application and to simplify description, and not to indicate or imply that the apparatus or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

Some embodiments of the present application are described in detail below with reference to the accompanying drawings. Features of the embodiments described below may be combined with each other without conflict.

Embodiment one:

the portable printer provided in this embodiment, as shown in fig. 1 to 11, includes a base 2 and a cover 1 covering the top of the base 2; the inside of the base 2 is provided with: a print head 5 arranged in a vertical direction, and a platen roller 209 opposed to the print head 5, the platen roller 209 rotating about a first axis. The vertical direction refers to the extending direction of the print head 5 when the printer is placed on a horizontal deck, i.e., the height direction of the printer. The platen roller 209 feeds out the recording paper by rotating in a state in which the recording paper is sandwiched between the platen roller and the print head 5; an actuator lever 4 for driving the printhead 5 to approach or separate from the platen roller 209 in response to the opening/closing operation of the cover 1 is disposed in the housing 2; wherein the actuating lever 4 is configured to swing around a second axis parallel to the first axis, the first axis and the second axis being two axes of different positions, and the first axis and the second axis being axes in the vertical direction. The actuating rod 4 is provided with a mounting part for mounting the printing head 5 and a driving part 401 which extends out of the base body 2 to be driven by the cover body 1, and the driving part 401 is positioned at the end part of the actuating rod 4; the cover 1 has an abutting portion 101a capable of abutting against the driving portion 401 to drive the actuating lever 4 to swing, the abutting portion 101a is located on the inner side surface of the cover 1, and the abutting portion 101a is not visible after closing the cover. The holding force of the printhead 5 and the platen roller 209 is derived from the holding force of the cover 1 on the actuator lever 4.

The print head 5 in this embodiment is a thermal print head including a thermal element and a print head holder for mounting the thermal element. Accordingly, the recording paper is also thermal paper. This is not a limitation of the application and other types of printheads may be used in other embodiments.

As shown in fig. 5 and 6, when the cover 1 is closed, the abutting portion 101a abuts against the driving portion 401 to drive the actuation lever 4 to swing, and the print head 5 approaches the platen roller 209 during the swing of the actuation lever 4. A biasing member 212 is disposed between the actuator lever 4 and the housing 2, and the biasing member 212 is configured to bias the actuator lever 4 in a direction in which the printhead 5 is away from the platen roller 209. When the cover 1 is opened, the abutting portion 101a releases the driving portion 401, the urging member 212 drives the actuating lever 4 to swing, and the print head 5 is away from the platen roller 209 during the swing of the actuating lever 4. The seat 2 has a pivot shaft 213 extending along the second axis, and the actuating rod 4 is formed with a pivot hole, and the pivot hole and the pivot shaft 213 are adapted to pivotally connect the actuating rod 4 to the seat 2. The urging member 212 is a torsion spring provided on the pivot shaft 213, at least one leg of which is connected to the actuation lever 4 to urge the actuation lever 4. Specifically, the top of the pivot shaft 213 has a recess, the body of the torsion spring is fixed in the recess, and the torsion spring has two legs, one leg is fastened and fixed on the pivot shaft 213, and the other leg is fastened and fixed on the actuating rod 4, so as to apply a force on the actuating rod 4, so that the actuating rod 4 can return to the initial position after losing the force of the cover 1. After the cover 1 is opened, the gap between the print head 5 and the platen roller 209 is maximized, and the user can take out the recording paper for replacement.

It should be noted that, in other embodiments, the force application member 212 may be a spring or a spring plate, for example, a spring or a spring plate is selected as the force application member 212, and the position on the actuating rod 4 near the driving portion 401 or the position near the mounting portion is provided with the spring or the spring plate, so that the abutting portion 101a needs to overcome the elastic force of the spring or the spring plate to drive the actuating rod 4 to swing when the abutting portion abuts against the driving portion 401.

Further, the cover body 1 is connected to the seat body 2 through a rotating shaft, and a cover opening torsion spring is sleeved on the rotating shaft, a first support leg of the cover opening torsion spring is abutted to the seat body 2, a second support leg is abutted to the cover body 1, and a main body part is sleeved on the rotating shaft. During the capping process, the abutting portion 101a on the cap body 1 abuts against the driving portion 401 of the actuating lever 4, so that the actuating lever 4 swings about the second axis, and the print head 5 gradually approaches the platen roller 209 during the swinging of the actuating lever 4. When the print head 5 is pressed against the platen roller 209, the recording paper is sandwiched therebetween, and the motor 210 drives the platen roller 209 to rotate through the transmission mechanism 211, thereby realizing feeding of the recording paper. During the opening process, the abutting portion 101a of the actuating lever 4 gradually releases the driving portion 401, and the actuating lever 4 is reversed by the urging member 212, so that the print head 5 is moved away from the platen roller 209. Fig. 1 shows a closed cover state of the printer, and fig. 2 shows an opened cover state of the printer.

Compared with the actuating mechanism used for driving the printing head to approach or separate from the paper pressing roller in the prior art, the actuating rod is simple in structure, less in required transmission mechanism, no multiple transmission is needed, and more elastic elements are not needed to drive the actuating mechanism to reset, so that the actuating rod in the portable printer is simpler and more convenient in structure, more direct and effective in action, smaller in occupied space and capable of better meeting the use requirements of miniaturization and portability. And because the transmission mechanism is fewer, the number of times of faults is reduced, the damage is less easy, and the later maintenance and replacement are more convenient.

As shown in fig. 7 and 8, a mounting chamber is formed in the mounting portion of the actuating lever 4, and the print head 5 is disposed in the mounting chamber. The mounting cavity is a concave cavity recessed inward from the end of the actuating rod 4, and the end of the actuating rod 4 has an opening through which the print head 5 is fitted into the mounting cavity. An elastic member 6 for pressing the print head 5 is arranged in the mounting part, and the elastic member 6 is a cylindrical spring. The elastic member 6 applies force to the print head 5 in a direction in which the print head 5 approaches the platen roller 209, so that a gap between the print head 5 and the platen roller 209 can be adapted to the thickness of the recording paper when the print head 5 abuts against the platen roller 209, and thus, papers in a larger thickness range can be adapted to avoid failing to pass through the gap between the print head 5 and the platen roller 209, that is, a paper feed path when the papers are thicker. Specifically, both ends of the cylindrical spring abut against the print head 5 and the chamber wall of the installation chamber, respectively.

In this embodiment, the print head 5 and the mounting portion are connected by a sliding structure, that is, the print head 5 can float up and down in the mounting cavity, where the sliding structure includes a sliding block disposed on the left and right sides of the print head 5 and a sliding groove disposed on the left and right side walls of the mounting portion, the sliding blocks on the left and right sides extend into the sliding groove, and the sliding block and the print head 5 support are integrally disposed and can slide up and down in the sliding groove. The bottom wall of the mounting part is provided with a limiting protrusion for supporting the printing head 5 and limiting the position of the printing head 5, and the limiting protrusion is positioned at the tail part of the printing head 5 bracket. The limit projection and the platen roller 209 together form a stable support for the print head 5 during printing.

Further, in order to achieve the compact structure, the actuating rod 4 is arranged in a shape of a V with an opening facing away from the platen roller 209, as shown in fig. 6-8, a mounting portion is provided at an end of the actuating rod 4 near the platen roller 209, a driving portion 401 is provided at an end of the actuating rod 4 far away from the platen roller 209, the driving portion 401 is formed by extending a rod body of the actuating rod 4 laterally thereto, and the second axis is located at a bending position on the actuating rod 4, that is, the mounting portion and the driving portion are respectively located at different sides of the actuating rod with respect to the second axis. Specifically, a pivot shaft 213 extending along the second axis is provided on the seat 2, and a pivot hole is formed at the bending position on the actuating rod 4, and the pivot hole and the pivot shaft 213 are adapted to enable the actuating rod 4 to be pivotally connected to the seat 2; the cover body 1 is provided with a rotating part, the base body 2 is provided with a rotating shaft, the cover body 1 is matched with the rotating shaft to rotate and cover the base body 2, the rotating part is provided with an abutting part 101a for abutting against the driving part 401, and correspondingly, the driving part is provided with a lug matched with the abutting part. The first casing 201 has a window 201a through which the driving portion 401 extends, and the driving portion 401 extends from the window 201a to the first casing 201, so that the cover 1 can press the driving portion 401 to swing the actuating lever 4 around the second axis during the closing process.

As shown in fig. 5 and 6, a paper roller driving device for driving the paper roller 209 to rotate is provided in the base 2, the paper roller driving device includes a driving motor 210 and a transmission mechanism 211, the driving motor 210 is installed at the opening side of the actuating lever 4, and the central axis and the second axis of the driving motor 210 are parallel. Inside the seat 2, there is a lining board 205 perpendicular to the second axis, and the driving motor 210 and the transmission mechanism 211 are respectively disposed on the upper and lower sides of the lining board 205. Specifically, the transmission mechanism 211 includes a plurality of gears that intermesh to drive, and in other embodiments other transmission mechanisms 211 are possible, such as a belt transmission mechanism 211. The motor 210 may transmit power to the platen roller 209 through a transmission mechanism 211 so that the platen roller 209 rotates. The recording paper can be moved to feed the recording paper when the platen roller 209 rotates. The motor 210 and the transmission mechanism 211 are respectively located on the upper side and the lower side of the inner lining plate 205, which is beneficial to making the structure of the whole machine more compact.

As shown in fig. 4, a first housing 201 is installed in the base 2, a first chamber is formed between the first housing 201 and the inner liner 205, and the driving motor 210 and the actuating rod 4 are disposed in the first chamber. The second housing 202 is installed in the base 2, a second chamber is formed between the second housing 202 and the inner liner 205, the platen roller 209 is disposed in the second chamber, and both end portions of the platen roller 209 are rotatably coupled to the second housing 202 and the inner liner 205, respectively. The above configuration is advantageous in that the overall structure is compact. In the present embodiment, the outer case 203 is a bottomed cylindrical structure, and the inner liner 205 is fitted into the outer case 203 through a top opening of the outer case 203, and the first cover 201 and the second cover 202 are both detachably mounted on the inner liner 205.

Referring further to fig. 4, a first cover 201 and a second cover 202 are installed in the base 2, the first cover 201 and the second cover 202 are downward open and fastened to the inner lining 205, the actuating rod 4 is disposed in the first cover 201, the platen roller 209 is disposed in the second cover 202, a paper feeding gap for paper feeding is formed between the first cover 201 and the second cover 202, and the print head 5 and the platen roller 209 are disposed at both sides of the paper feeding gap. The housing 2 has a housing 203 for constituting a bottom wall and side walls thereof, and the side walls of the first housing 201, the second housing 202 and the housing 203 are collectively enclosed as a paper compartment 204 for mounting paper rolls. The forming structure of the paper bin 204 can maximize the volume of the paper bin 204, put more recording paper in the paper bin 204, and has simple structure and convenient installation.

As shown in fig. 3 and 5, the interior lining 205 is disposed in the housing 2, and a third chamber is formed between the interior lining 205 and the bottom wall of the housing 203, and a battery 206 and a circuit board 207 are mounted in the third chamber. Specifically, the battery 206 is a rechargeable battery 206, the third chamber is internally provided with a circuit board 207, and a partition plate 208 is disposed between the circuit board 207 and the battery 206, so that the partition plate 208 can prevent heat generated by the battery 206 from being transferred to the circuit board 207 during operation, and normal operation of the circuit board 207 is affected. The spacer 208 is fixed to the inner liner 205 by screws, the battery 206 is also fixed to the inner liner 205, and the circuit board 207 is fixed to the spacer 208.

As shown in fig. 3 and 9, the cover 1 includes an inner cover 101 and an outer cover 102, and a stopper 101b for restricting upward movement of the paper roll is provided on the inner cover 101 to prevent paper jam caused by paper roll jump during printing.

As shown in fig. 10, in order to facilitate the assembly of the lining board 205, in this embodiment, a guiding and limiting board 203a is further disposed on the inner side wall of the base along the height direction of the printer, and a notch groove 205a adapted to the guiding and limiting board is disposed on the lining board 205, and the guiding and limiting board 203a cooperates with the notch groove 205a to guide the lining board to be placed into the accommodating cavity and limit the lining board. That is, when the lining board is assembled, the notch groove on the lining board can be aligned with the guide limiting plate in the base body for insertion, and after the lining board is assembled in place, the guide limiting plate and the notch groove can be used for preventing the lining board from shaking along the horizontal direction.

As shown in fig. 11, in order to further reduce the overall design thickness of the printer, in this embodiment, a sinking groove 205b is further provided on the inner liner in the print head swinging area to increase the accommodation height in the vertical direction in the print head swinging area, that is, the thickness of the inner liner itself is reduced in the above area on the inner liner, so that the overall thickness of the printer can be reduced on the premise of determining the print head length. Further, as shown in fig. 2, 4 and 5, in this embodiment, an upper protruding groove 201b is formed on the first housing 201 and protrudes upward in the print head swinging area, so as to increase the accommodation height in the vertical direction in the print head swinging area, that is, a certain accommodation space is formed on the first housing and protrudes upward in the area, so that the thickness of the whole printer can be reduced on the premise of determining the length of the print head.

In addition, a detection switch is arranged on the actuating rod 4, and a trigger piece is arranged in the second housing 202; or a detection switch is arranged in the second housing 202, and a trigger piece is arranged on the actuating rod 4; the trigger triggers a detection switch to generate an electrical signal when the printhead 5 approaches the platen roller 209. The trigger piece is a magnet, and the detection switch is a Hall element. When the printing head 5 approaches the platen roller 209, the magnet triggers the Hall element to generate an electric signal so as to judge whether the cover is closed in place or not, and whether the gap between the printing head 5 and the platen roller 209 is in a state suitable for printing or not, thereby avoiding wasting the recording paper.

Further, a detecting device for detecting whether or not there is recording paper in the paper feed path may be provided, and the detecting device may be two opposed infrared sensors, and when there is paper in the paper feed path, the recording paper shields infrared rays generated by the infrared ray generator so that the infrared ray receiver cannot receive the infrared rays, thereby realizing the determination of the paper.

Further, in order to determine the open/close state of the cover 1, a magnet is provided on the cover 1 in the further embodiment, and a hall element is provided inside the second housing 202. When the cover 1 is in the closed state, the magnet can trigger the hall element, and the control device determines that the cover is closed. When the cover body 1 is in the cover opening state, the magnet is far away from the Hall element, the Hall element is in the disconnection state, and the control device determines that the cover opening state is achieved.

The working process of the application is as follows:

in use, the cover 1 is opened and a roll of recording paper is placed in the paper bin 204. At this time, the gap between the print head 5 and the platen roller 209 is maximized, the recording paper can be led out from the paper feed path, and then the cover 1 is closed, and in the closing process, the abutting portion 101a on the cover 1 abuts against the driving portion 401, so that the actuating lever 4 is rotated to bring the print head 5 close to the platen roller 209, and the recording is held in the gap therebetween. When the motor 210 drives the platen roller 209 to rotate, it is possible to feed the recording paper while printing. After printing is completed, the user can cut the recording paper by a cutter provided at the opening of the paper feed passage. When the paper in the paper bin 204 is out of the paper, the cover 1 can be opened for replacement.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present application should be included in the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims

1. A portable printer comprises a base and a cover body covering the top of the base; the base is provided with:

a print head arranged in a vertical direction; and, a step of, in the first embodiment,

a platen roller opposite the printhead, the platen roller rotating about a first axis:

the platen roller feeds out the recording paper by rotating in a state in which the recording paper is sandwiched between the platen roller and the print head;

the method is characterized in that:

the base is also provided with an actuating rod for driving the printing head to approach or depart from the platen roller in response to the opening and closing action of the cover body;

wherein the actuating lever is configured to swing about a second axis parallel to the first axis, and the actuating lever has a mounting portion adapted to mount a printhead and a driving portion adapted to be driven by a cover;

the cover body is provided with an abutting part which can abut against the driving part to drive the actuating rod to swing, when the cover body is closed, the abutting part abuts against the driving part to drive the actuating rod to swing, and in the swing process of the actuating rod, the printing head is close to the platen roller.

2. The portable printer according to claim 1, wherein a biasing member is disposed between the actuating lever and the housing, the biasing member being configured to bias the printhead against the actuating lever in a direction away from the platen roller.

3. The portable printer according to claim 2, wherein the abutting portion releases the driving portion when the cover is opened, the urging member drives the actuating lever to swing, and the print head is away from the platen roller during the swing of the actuating lever.

4. The portable printer of claim 2, wherein the housing has a pivot axis extending along the second axis, and wherein the actuator lever has a pivot aperture formed therein, the pivot aperture and the pivot axis being adapted to pivotally connect the actuator lever to the housing.

5. The portable printer of claim 4, wherein said urging member is a torsion spring disposed on the pivot shaft, a leg of said torsion spring being connected to said actuating lever to urge the actuating lever.

6. The portable printer of claim 1, wherein said mounting portion has a mounting cavity formed therein, said printhead being disposed within said mounting cavity.

7. The portable printer according to claim 6, wherein an elastic member for pressing the print head is provided in the mounting portion, and the elastic member is biased toward the print head in a direction in which the print head approaches the platen roller, so that a gap between the print head and the platen roller can be adapted to a thickness of the recording paper.

8. The portable printer of claim 7, wherein the printhead and the mounting portion are engaged by a sliding structure comprising a slider disposed on left and right sides of the printhead and a chute disposed on left and right side walls of the mounting portion.

9. The portable printer of claim 8, wherein the mounting portion has a bottom wall provided with a spacing projection for supporting the printhead and defining a printhead position.

10. The portable printer according to claim 1, wherein the abutment portion is formed by a downward extension of a lower side surface of the cover, and the driving portion and the mounting portion are disposed on different sides of the actuating lever.

11. The portable printer according to claim 10, wherein the cover is provided with a rotating portion, the cover is pivotally connected to the base by the rotating portion, and the abutting portion is formed on the rotating portion.

12. The portable printer according to claim 11, wherein the driving portion is provided as a projection corresponding to the abutting portion, and the base is provided with a window through which the driving portion protrudes to be pressed by the abutting portion.

13. The portable printer of claim 12 wherein said actuator lever is slightly V-shaped with an opening facing away from said platen roller.

14. The portable printer according to claim 13, wherein a paper roller driving device for driving the platen roller to rotate is provided in the housing, the paper roller driving device includes a driving motor and a transmission mechanism, the driving motor is installed at an opening side of the actuating lever, and a central axis and a second axis of the driving motor are parallel.

15. The portable printer of claim 14, wherein a liner plate perpendicular to the second axis is disposed in the housing, and the driving motor and the transmission mechanism are disposed on upper and lower sides of the liner plate, respectively.

16. The portable printer of claim 15, wherein a first housing is mounted within said housing, a first chamber is formed between said first housing and said interior liner, and said drive motor and actuator rod are both disposed within said first chamber.

17. The portable printer of claim 15, wherein a second housing is mounted in the housing, a second chamber is formed between the second housing and the interior lining, the platen roller is disposed in the second chamber, and both end portions of the platen roller are rotatably coupled to the second housing and the interior lining, respectively.

18. The portable printer of claim 15, wherein the interior liner has a countersink in the print head oscillation area to increase the vertical height of the print head oscillation area.

19. The portable printer according to claim 16 or 18, wherein the first housing has an upper convex groove formed thereon so as to protrude upward in the print head swing area, so as to increase the accommodation height in the vertical direction in the print head swing area.

20. The portable printer according to claim 1, wherein the housing has a first housing and a second housing, the actuating lever is disposed in the first housing, the platen roller is disposed in the second housing, and a paper feed gap for feeding paper is formed between the first housing and the second housing.

21. The portable printer of claim 20, wherein said housing has a housing for forming a bottom wall and side walls thereof, said first and second housings and side walls of the housing collectively enclosing a paper compartment for mounting a recording paper roll.

22. The portable printer of claim 21, wherein a liner is disposed within said housing, a third chamber being defined between said liner and a bottom wall of said housing, said third chamber having a battery mounted therein.

23. The portable printer of claim 22, wherein said battery is a rechargeable battery, a circuit board is mounted in said third chamber, and a separator is disposed between said circuit board and the battery.

24. The portable printer according to claim 21, wherein the cover body includes an inner cover and an outer cover, and wherein the inner cover is provided with a stopper portion for restricting upward movement of the recording paper roll.