A portable printer

Abstract

The utility model discloses a portable printer, include: casing, casing includes detachable connection's bottom shell and middle shell, and the bottom shell is formed with the middle shell and holds the cavity, and the bottom shell is provided with at least two positioning post and at least one fixed column, and the fixed column is equipped with the fastening hole, and the middle shell has the paper bin, the cover, the cover rotation is installed in the middle shell, and the cover is used for closing the paper bin, the core, the core sets up in the holding cavity, and the core is provided with the positioning hole and the mounting hole, and the positioning post is equipped with in the positioning hole, and the mounting hole is formed with the fixed column and communicates and forms the connecting hole, and the connecting hole is provided with the fastener, and the fastener is equipped with the mounting hole and is connected to the fixed column. The utility model through setting at least two positioning post on the bottom shell and the hole axle cooperation of the positioning hole on the core, has realized the quick preposition of the core in the holding cavity, avoided the core deviation or misplacement due to artificial righting shortage in the fastener locking process, thereby improved the assembly accuracy and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of printer technology, and in particular to a portable printer. Background Technology

[0002] In the manufacturing of portable printers, the printer mechanism, as a core functional module, directly impacts the overall assembly quality and production cost due to the accuracy and efficiency of its installation. Some existing printer structures, in pursuit of functional integration or diverse appearances, often include numerous components, leading to cumbersome assembly processes and higher costs. In contrast, using pre-formed embedded mechanisms is an effective way to simplify the overall structure, reduce material quantity, and lower assembly complexity. However, the full realization of this structure's advantages largely depends on the mechanism's installation and fixation process within the printer. Specifically, during assembly, the mechanism is typically secured to the housing frame using screws. If the mechanism lacks effective and rapid pre-positioning before screwing, relying solely on manual alignment by the operator, it is highly susceptible to displacement or misalignment during screw tightening. This misalignment can not only lead to poor connection between the mechanism and connecting components such as the motherboard, affecting printing functionality, but may even damage precision components, resulting in rework or scrap, thus negating the efficiency gains and cost advantages brought by fewer parts and easier assembly. Therefore, we provide a portable printer to address these issues. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a portable printer.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A portable printer includes:

[0006] The housing includes a detachably connected bottom shell and a middle shell, the bottom shell and the middle shell forming an accommodating cavity, the bottom shell being provided with at least two positioning posts and at least one fixing post, the fixing post being provided with fastening holes, and the middle shell having a paper compartment;

[0007] A cover body, which is rotatably mounted on the middle shell, is used to close the paper compartment;

[0008] The movement is disposed in the receiving cavity. The movement is provided with a positioning hole and a mounting hole. The positioning post passes through the positioning hole. The mounting hole communicates with the fixing post to form a connecting hole. A fastener is provided in the connecting hole. The fastener passes through the mounting hole and is connected to the fixing post.

[0009] Preferably, the cover is provided with rotating arms on both sides, the rotating arms are provided with rotating shafts, the middle shell is provided with fixing holes on both sides, and the rotating shaft extends at least partially into the fixing holes.

[0010] Preferably, the rotating arm is further provided with a positioning protrusion, and guide grooves are provided on both sides of the middle shell. The guide groove is an arc-shaped elongated groove with the fixing hole as the center and the distance between the rotating shaft and the positioning protrusion as the radius. The positioning protrusion extends into the guide groove.

[0011] Preferably, the middle shell includes a shell member and flanges, and flanges are provided on both sides of the shell member. The flanges are provided with clearance through holes for avoiding the rotating arm.

[0012] Preferably, the cover body is further provided with fixed walls on both sides, and the fixed walls are provided with mounting grooves, in which a rubber roller is rotatably disposed;

[0013] The mechanism includes a mounting frame and a rotary drive component. The mounting frame has a positioning groove, and a limit spring is provided on one side of the positioning groove. The end of the rubber roller extends into the positioning groove, and the limit spring abuts against the rubber roller. The rotary drive component is connected to the rubber roller and drives the rubber roller to rotate. A print head is also mounted on the mounting frame.

[0014] Preferably, the rubber roller includes a roller body disposed in the mounting groove, and bushings are provided on both ends of the roller body. A transmission tooth is also installed on one end of the roller body. The limiting spring abuts against the bushing circumference, and the transmission tooth is connected to the rotary drive component.

[0015] Preferably, the opening of the positioning groove is provided with a guide surface.

[0016] Preferably, the cover has anti-slip grooves on both sides, and anti-slip protrusions are provided on the bottom wall of the anti-slip grooves.

[0017] Preferably, the portable printer further includes a circuit control board and a power supply, both of which are disposed within the accommodating cavity.

[0018] This utility model has the following advantages:

[0019] 1. This utility model achieves rapid pre-positioning of the movement within the accommodating cavity by engaging at least two positioning pins on the bottom shell with the positioning holes on the movement. This avoids movement offset or misalignment caused by insufficient manual alignment during fastener tightening, thereby improving assembly accuracy and efficiency, ensuring reliable connection between the movement and connecting components such as the circuit control board, reducing rework or scrap rates caused by improper installation, and fully leveraging the advantages of simplified structure and convenient assembly of pre-processed embedded movement.

[0020] 2. This utility model achieves a stable and smooth rotational connection between the cover and the middle shell by setting fixing holes on both sides of the middle shell and cooperating with the rotating shafts on the rotating arms on both sides of the cover. This ensures that the cover is structurally stable and has a clear movement trajectory during the opening and closing process, thereby facilitating users to reliably open or close the paper compartment and improving the product's ease of use and assembly reliability.

[0021] 3. This utility model sets a positioning protrusion on the rotating arm and opens arc-shaped elongated grooves on both sides of the middle shell with the fixing hole as the center and the distance between the rotating shaft and the positioning protrusion as the radius. This allows the positioning protrusion to slide in the guide groove, providing a precise arc-shaped trajectory guide for the rotation of the cover. This effectively prevents the problem of the cover rotation jamming caused by the misalignment of the rotating shaft and the fixing hole due to the tolerance of the parts processing or assembly, and ensures the smoothness and stability of the opening and closing action of the cover. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the printer's structure in an exploded state.

[0023] Figure 2 This is a schematic diagram of the bottom shell structure of this utility model.

[0024] Figure 3 This is a first-view structural diagram of the movement of this utility model.

[0025] Figure 4 This is a schematic diagram of the second-view structure of the movement of this utility model.

[0026] Figure 5 This is a schematic diagram of the structure of the shell and cover in the exploded state of this utility model.

[0027] Figure 6 This is a schematic diagram of the structure of the mechanism and the rubber roller of this utility model in the form of their interaction.

[0028] In the diagram, 100 is the outer shell; 101 is the accommodating cavity; 110 is the bottom shell; 111 is the positioning post; 112 is the fixing post; 1121 is the fastening hole; 120 is the middle shell; 1201 is the paper tray; 1202 is the fixing hole; 1203 is the guide groove; 1204 is the clearance through hole; 121 is the shell component; 122 is the flange; 200 is the cover; 201 is the anti-slip groove; 202 is the anti-slip protrusion; 210 is the rotating arm; and 211 is the rotating shaft. 212. Positioning protrusion; 220. Fixed wall; 221. Mounting groove; 300. Mechanism; 301. Positioning hole; 302. Mounting hole; 310. Mounting bracket; 311. Positioning groove; 3111. Guide surface; 312. Limiting spring; 320. Rotary drive component; 330. Print head; 400. Rubber roller; 410. Roller body; 420. Bushing; 430. Transmission gear; 500. Circuit control board; 600. Power supply. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] like Figure 1 — Figure 6 The example shown.

[0032] This application provides a portable printer, which includes a housing 100, a cover 200, and a mechanism 300. Specifically, the housing 100 includes a detachably connected bottom shell 110 and a middle shell 120, which together form a receiving cavity 101. The bottom shell 110 is provided with at least two positioning posts 111 and at least one fixing post 112. The fixing post 112 is provided with a fastening hole 1121. The middle shell 120 has a paper tray 1201. The cover 200 is rotatably mounted on the middle shell 120 and is used to close the paper tray 1201. The mechanism 300 is disposed in the receiving cavity 101 and is provided with a positioning hole 301 and a mounting hole 302. The positioning post 111 passes through the positioning hole 301, and the mounting hole 302 communicates with the fixing post 112 to form a connecting hole. A fastener is provided in the connecting hole and passes through the mounting hole 302 to connect to the fixing post 112.

[0033] Please see Figure 1 , Figure 2 , Figure 3 as well as Figure 4As shown, when installing the movement 300, first align the positioning hole 301 with the positioning post 111, so that the positioning post 111 extends into the positioning hole 301 to position the entire movement 300. At the same time, the mounting hole 302 of the movement 300 is located at the position of the fixing post 112, and the mounting hole 302 is connected to the fastening hole 1121. Next, the fastener can be inserted through the mounting hole 302 and placed in the fastening hole 1121 to complete the installation of the movement 300, so that the movement 300 is relatively fixed to the bottom case 110.

[0034] There are two positioning pins 111 and two positioning holes 301. It can be understood that in order to position the movement 300, at least two positioning pins 111 and two positioning holes 301 are needed on a plane to define the position of the movement 300. Alternatively, only one mounting hole 302 and one fixing pin 112 are needed to install the movement 300. In this embodiment, in order to improve the installation effect of the movement 300, the two mounting holes 302 and the two fixing pins 112 are connected. It should be noted that the fastening hole 1121 is a threaded hole, and the fastener is a screw. That is, the movement 300 and the bottom shell 110 are fixed by connecting screws and threaded holes.

[0035] It should be noted that before fixing the movement 300, the movement 300 is fixed by the hole-shaft cooperation between the positioning pin 111 and the positioning hole 301. When tightening with screws, no manual straightening is required, making the installation of the movement 300 more accurate.

[0036] In some embodiments, rotating arms 210 are provided on both sides of the cover 200, and rotating shafts 211 are provided on the rotating arms 210. Fixing holes 1202 are provided on both sides of the middle shell 120, and the rotating shafts 211 extend at least partially into the fixing holes 1202.

[0037] Please see Figure 5 As shown, in order to enable the cover 200 to be rotatably connected relative to the middle shell 120, fixing holes 1202 are opened on both sides of the middle shell 120, and the fixing holes 1202 on both sides are coaxially arranged. Next, the rotating shaft 211 on the rotating arm 210 is inserted into the fixing hole 1202 to achieve shaft-hole fit, so that the cover 200 can rotate around the fixing hole 1202 as the rotation center and the rotating shaft 211 as the rotation axis to close and open the paper compartment 1201.

[0038] In some embodiments, the rotating arm 210 is also provided with a positioning protrusion 212, and the middle shell 120 is provided with guide grooves 1203 on both sides. The guide groove 1203 is an arc-shaped elongated groove with the fixing hole 1202 as the center and the distance between the rotating shaft 211 and the positioning protrusion 212 as the radius. The positioning protrusion 212 extends into the guide groove 1203.

[0039] Please continue reading. Figure 5 As shown, since the cover 200 and the middle shell 120 only rotate through the cooperation of the rotating shaft 211 and the hole 1202, manufacturing errors may cause the axis of the fixed hole 1202 to be out of line with the axis of the rotating shaft 211, which may cause the cover 200 to rotate too far and get stuck. To address this, guide grooves 1203 are provided on both sides of the middle shell 120 and positioning protrusions 212 are provided on the rotating arm 210. During the rotation of the cover 200 relative to the middle shell 120, the positioning protrusions 212 move along the trajectory of the guide grooves 1203, thereby achieving a guiding function.

[0040] It is understandable that the rotating arm 210 and the positioning protrusion 212 both rotate around the fixing hole 1202. Therefore, the rotation trajectory of the positioning protrusion 212 is an arc. To cooperate with the positioning protrusion 212 to guide the cover 200, the guide groove 1203 is an arc-shaped groove with the distance between the rotating shaft 211 and the positioning protrusion 212 as the radius, specifically an arc-shaped elongated oval groove.

[0041] In some embodiments, the middle shell 120 includes a shell 121 and a flange 122. The shell 121 is provided with flanges 122 on both sides, and the flanges 122 are provided with clearance through holes 1204 for avoiding the rotating arm 210.

[0042] Please continue reading. Figure 5 As shown, the middle shell 120 is composed of a shell 121 and flanges 122 extending outward from the top of the two sides of the shell 121. In order to ensure the connection strength, the shell 121 and the flanges 122 are integrally formed. The fixing hole 1202 and the guide groove 1203 are provided on the two sides of the shell 121. Since the fixing hole 1202 needs to cooperate with the rotating shaft 211 and the guide groove 1203 needs to cooperate with the positioning protrusion 212, in order to prevent the flange 122 from causing motion interference to the installation of the rotating shaft 211 and the positioning protrusion 212, a clearance through hole 1204 is opened through the upper surface of the flange 122. This allows the rotating arm 210 to pass through the clearance through hole 1204 to install the rotating shaft 211 into the fixing hole 1202 and to install the positioning protrusion 212 into the guide groove 1203.

[0043] In some embodiments, the cover 200 is further provided with fixed walls 220 on both sides, and the fixed walls 220 are provided with mounting grooves 221. A rubber roller 400 is rotatably disposed in the mounting grooves 221. The mechanism 300 includes a mounting frame 310 and a rotary drive 320. A positioning groove 311 is provided on the mounting frame 310. A limit spring 312 is provided on one side of the positioning groove 311. The end of the rubber roller 400 extends into the positioning groove 311, and the limit spring 312 abuts against the rubber roller 400. The rotary drive 320 is connected to the rubber roller 400 in a transmission connection, driving the rubber roller 400 to rotate. A print head 330 is also mounted on the mounting frame 310.

[0044] Please see Figure 4 , Figure 5 and Figure 6 As shown, the fixed wall 220 is integrally formed on the cover 200. The mounting groove 221 on the fixed wall 220 has an opening, allowing the end of the rubber roller 400 to enter it. When the cover 200 flips towards the middle shell 120 to close the paper tray 1201, both ends of the rubber roller 400 will enter the positioning groove 311 of the inverted mounting bracket 310. At the same time, the limiting spring 312 on one side of the positioning groove 311 will abut against both ends of the rubber roller 400 to prevent the rubber roller 400 from disengaging from the positioning groove 311. After the end of the rubber roller 400 is inserted into the positioning groove 311, the rubber roller 400 is connected to the rotary drive 320 for transmission. The rotary drive 320 drives the rubber roller 400 to rotate, thereby driving the printing paper roll to unwind and print.

[0045] In this embodiment, the limiting spring 312 is a clamping spring adapted to the peripheral surface of the end of the rubber roller 400. The elasticity of the spring restricts the rubber roller 400 within the positioning groove 311. It can be understood that if the force of the cover 200 driving the rubber roller 400 is greater than the elastic force of the spring, the rubber roller 400 will disengage from the rotating shaft 211 and the cover 200 will rotate in the opposite direction to open the cover.

[0046] In some embodiments, the rubber roller 400 includes a roller body 410 disposed in the mounting groove 221. Both ends of the roller body 410 are provided with bushings 420. One end of the roller body 410 is also provided with a transmission tooth 430. A limiting spring 312 abuts against the circumferential surface of the bushing 420. The transmission tooth 430 is connected to the rotation drive 320 in a transmission connection.

[0047] Please continue reading. Figure 4 , Figure 5 as well as Figure 6As shown, the rubber roller 400 includes a roller body 410 and bushings 420 located at both ends of the roller body 410. It can be understood that the bushings 420 are rotatable relative to the roller body 410. Initially, the mounting groove 221 is circular and has an opening when viewed from the side. The fixing wall 220 can deform under force to change the size of the opening of the mounting groove 221. The opening of the mounting groove 221 should be slightly smaller than the bushings 420. Therefore, during installation, the bushings 420 can be inserted into the mounting groove 221 and fixed by the fixing wall. The force generated by the deformation of 220 will firmly insert the bushing 420 into the mounting groove 221, completing the installation of the roller body 410. Correspondingly, when the cover 200 rotates to close the paper compartment 1201, the bushings 420 at both ends of the roller body 410 will press down to overcome the elastic force of the positioning groove 311, thereby installing the bushing 420 into the positioning groove 311, realizing the connection between the bushing 420 and the positioning groove 311, avoiding the pinching limit spring 312 abutting against the circumferential surface of the bushing 420 to prevent the bushing 420 from falling out of the positioning groove 311.

[0048] It is understandable that in order to drive the roller 410 to rotate via the rotary drive 320, the rotary drive 320 is connected to the transmission gear 430 at one end of the roller 410. The rotary drive 320 transmits power to the transmission gear 430 to finally achieve the rotation of the roller 410.

[0049] For example, the rotary drive 320 is a motor, and a gear is installed at the power output end of the rotary drive 320. During the closing process of the cover 200, the roller 410 is driven to move towards the core 300. At the same time, the bushings 420 at both ends of the roller 410 enter the positioning groove 311, and the transmission gear 430 meshes with the gear at the output end of the rotary drive 320 to transmit power.

[0050] For example, the bushing 420 can be a bearing, the limiting spring 312 abuts against the outer ring of the bearing, and the roller body 410 is installed on the inner ring of the bearing.

[0051] In some embodiments, a guide surface 3111 is provided at the opening of the positioning groove 311.

[0052] Please continue reading. Figure 6 As shown, in order to facilitate the bushing 420 entering the positioning groove 311, a guide surface 3111 is provided at the opening of the positioning groove 311 to guide it.

[0053] In some embodiments, the cover 200 is provided with anti-slip grooves 201 on both sides, and anti-slip protrusions 202 are provided on the bottom wall of the anti-slip grooves 201.

[0054] Please see Figure 5As shown, in order to make it easier to flip the cover 200 to open the paper compartment 1201, the anti-slip groove 201 and anti-slip protrusion 202 are designed to provide a force point when opening, making it easier to flip the cover 200 in the opposite direction to open.

[0055] In some embodiments, the portable printer further includes a circuit control board 500 and a power supply 600, both of which are disposed within the accommodating cavity 101.

[0056] like Figure 1 As shown, the circuit control board 500 is electrically connected to the print head 330 and the power supply 600. The circuit control board 500 controls the print head 330 to print fonts or patterns. The power supply 600 provides power to the circuit control board 500 and the print head 330. The circuit control board 500 has a corresponding charging port and a data interface. The charging port charges the power supply 600, and the data interface provides the corresponding printing data to the circuit control board 500. In this embodiment, the charging port and the data interface share a single interface. For example, this interface can be a Type-C, Micro USB, or other similar interface.

[0057] The working process of this utility model is as follows: When the printer is working, the user puts the printing paper into the paper tray 1201 of the middle shell 120, and then rotates the cover 200 to close the paper tray 1201. The rotating shafts 211 on the rotating arms 210 on both sides of the cover 200 extend into the fixing holes 1202 on both sides of the middle shell 120 to achieve rotation. At the same time, the positioning protrusions 212 on the rotating arms 210 move along the guide grooves 1203 on both sides of the middle shell 120 to guide, so that the cover 200 can smoothly close the paper tray 1201. During the closing process of the cover 200, the ends of the rubber rollers 400 in the mounting grooves 221 on the fixing walls 220 on both sides of the cover 200 extend into the positioning grooves 31 of the mounting bracket 310 of the core 300. 1. The limiting spring 312 abuts against the circumferential surface of the bushing 420 of the rubber roller 400 to prevent disengagement. The transmission gear 430 of the rubber roller 400 meshes with the rotation drive component 320 of the mechanism 300. The rotation drive component 320 drives the rubber roller 400 to rotate, thereby unwinding the printing paper roll. The circuit control board 500 controls the print head 330 to print. The power supply 600 provides power to the circuit control board 500 and the print head 330 to complete the printing process. When it is necessary to open the paper tray 1201, the user rotates the cover 200 in the opposite direction to separate the cover 200 from the middle shell 120. At this time, the elastic force of the limiting spring 312 is less than the force of the cover 200 driving the rubber roller 400, so that the rubber roller 400 disengages from the positioning groove 311, making it easy to replace the printing paper.

[0058] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A portable printer, characterized in that, include: The housing (100) includes a detachably connected bottom shell (110) and a middle shell (120), the bottom shell (110) and the middle shell (120) forming a receiving cavity (101), the bottom shell (110) is provided with at least two positioning posts (111) and at least one fixing post (112), the fixing post (112) is provided with a fastening hole (1121), and the middle shell (120) has a paper tray (1201). A cover (200) is rotatably mounted on the middle shell (120) and is used to close the paper tray (1201). The mechanism (300) is disposed in the accommodating cavity (101). The mechanism (300) is provided with a positioning hole (301) and a mounting hole (302). The positioning post (111) passes through the positioning hole (301). The mounting hole (302) communicates with the fixing post (112) to form a connecting hole. A fastener is provided in the connecting hole. The fastener passes through the mounting hole (302) and is connected to the fixing post (112).

2. The portable printer according to claim 1, characterized in that: The cover (200) is provided with rotating arms (210) on both sides, and a rotating shaft (211) is provided on the rotating arms (210). The middle shell (120) is provided with fixing holes (1202) on both sides, and the rotating shaft (211) extends at least partially into the fixing holes (1202).

3. The portable printer according to claim 2, characterized in that: The rotating arm (210) is also provided with a positioning protrusion (212), and the middle shell (120) is provided with guide grooves (1203) on both sides. The guide groove (1203) is an arc-shaped elongated groove with the fixing hole (1202) as the center and the distance between the rotating shaft (211) and the positioning protrusion (212) as the radius. The positioning protrusion (212) extends into the guide groove (1203).

4. The portable printer according to claim 3, characterized in that: The middle shell (120) includes a shell (121) and a flange (122). The shell (121) has flanges (122) on both sides. The flanges (122) have clearance through holes (1204) for avoiding the rotating arm (210).

5. The portable printer according to claim 1, characterized in that: The cover (200) is also provided with fixed walls (220) on both sides. The fixed walls (220) are provided with mounting grooves (221). A rubber roller (400) is rotatably installed in the mounting grooves (221). The mechanism (300) includes a mounting frame (310) and a rotary drive (320). The mounting frame (310) has a positioning groove (311). A limit spring (312) is provided on one side of the positioning groove (311). The end of the rubber roller (400) extends into the positioning groove (311), and the limit spring (312) abuts against the rubber roller (400). The rotary drive (320) is connected to the rubber roller (400) and drives the rubber roller (400) to rotate. A print head (330) is also mounted on the mounting frame (310).

6. The portable printer according to claim 5, characterized in that: The rubber roller (400) includes a roller body (410) disposed in the mounting groove (221). Both ends of the roller body (410) are provided with bushings (420). One end of the roller body (410) is also provided with a transmission tooth (430). The limiting spring (312) abuts against the bushing (420). The transmission tooth (430) is connected to the rotary drive (320) in a transmission connection.

7. The portable printer according to claim 5, characterized in that: The opening of the positioning groove (311) is provided with a guide surface (3111).

8. The portable printer according to claim 1, characterized in that: The cover (200) has anti-slip grooves (201) on both sides, and anti-slip protrusions (202) are provided on the bottom wall of the anti-slip grooves (201).

9. The portable printer according to claim 1, characterized in that: The portable printer also includes a circuit control board (500) and a power supply (600), both of which are disposed within the accommodating cavity (101).

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