A thermal printer

Abstract

The present invention provides a thermal printer, comprising a first component and a second component, wherein the first component is configured to be able to swing relative to the second component around a fixed axis so as to be convertible between a closed position and an open position, wherein in the closed position, the first component and the second component are interlocked with each other to form a prism having at least four prisms, and a joint surface formed by the first component and the second component is arranged between two of the two opposing prisms, one of the two opposing prisms is provided with a paper outlet, and the other is provided with a pivoting portion for the first component to pivotally connect with the second component, a printing area, a paper feeding channel, a paper roll storage chamber and a pivoting portion are arranged in sequence along the joint surface, and in the open position, the first component and the second component are unfastened and an opening for taking and placing cylindrical recording paper is formed between the two. The present invention effectively optimizes the structure, makes printing more stable, and has a larger printing paper capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of printers, and in particular to a thermal printer. Background Art

[0002] In daily life, printing is often required, and portable small printers are the first choice for people to print when going out. However, there are many problems with the current micro printers. First, due to the small size and unreasonable structural design, the amount of printing paper loaded is very small, and the printing paper often needs to be replaced. For example, a patent discloses a micro printer with a stable opening and closing cover. The patent publication number is CN106827834A. The main technology disclosed is: a micro printer with a stable opening and closing cover, including a shell body and an upper cover, the upper cover is buckled on the shell body, and the top surface of the shell body and the bottom surface of the upper cover are mutually matching surfaces; the bottom surface of the upper cover is provided with a buckle protruding toward the shell body, and a slot is correspondingly provided on the shell body, and the buckle is buckled with the slot; an elastic convex point is provided in the slot, and the elastic convex point presses the buckle toward the buckling point; the upper cover can be pushed forward and backward relative to the shell body. When the upper cover is opened, the upper cover is pushed to disengage the elastic convex point from pressing the buckle, and the buckle is disengaged from the slot.

[0003] In addition, the structural design and layout of functional components of the micro printer in the prior art are unreasonable, resulting in a small amount of printing paper loaded, and the paper path of the printing paper is too long, which is prone to deflection, thereby affecting the printing quality. Summary of the invention

[0004] In order to solve the above technical problems and optimize the structural design, the present invention adopts the following solutions:

[0005] A thermal printer comprises a first component and a second component;

[0006] Wherein, the first component is equipped with a thermal head and a control unit for controlling the operation of the thermal head;

[0007] Wherein, the second component is equipped with an embossing roller and a driving unit for driving the embossing roller to rotate;

[0008] The thermal head and the platen roller are arranged opposite to each other to form a printing area, and the recording paper is output from the paper outlet by rotating with the recording paper sandwiched between them;

[0009] A paper roll storage chamber for storing cylindrical recording paper and a paper feeding passage connecting the paper roll storage chamber and the printing area are formed between the first component and the second component;

[0010] The first component is configured to be able to swing relative to the second component about a fixed axis so as to be convertible between a closed position and an open position;

[0011] Features:

[0012] In the closed position, the first component and the second component are interlocked with each other to form a prism body having at least four prisms, and the joint surface formed by the first component and the second component is arranged between two opposing prisms, one of the two opposing prisms is provided with a paper outlet, and the other of the two opposing prisms is provided with a pivoting portion for the first component to be pivotally connected to the second component, and the printing area, the paper feeding channel, the paper roll storage chamber and the pivoting portion are arranged in sequence along the joint surface;

[0013] In the open position, the first component and the second component are unlocked and an opening for taking in and placing the cylindrical recording paper is formed therebetween.

[0014] As a further improvement, the prism is a quadrangular prism, and the joining surface divides the two relative prisms along the prism direction.

[0015] As a further improvement, in the open position, two side surfaces adjacent to the pivotal portion together constitute a supporting bottom surface of the thermal printer.

[0016] As a further improvement, the length of the paper feeding channel is less than 3.0 cm.

[0017] As a further improvement, the volume of the paper roll storage chamber is 40%-70% of the volume of the thermal printer.

[0018] As a further improvement, the paper roll storage chamber is a cylindrical chamber.

[0019] As a further improvement, in the closed position, the buckle portion formed on the first component is buckled and connected to the second component.

[0020] As a further improvement, a force-applying component is connected to the buckle portion, and the force-applying component applies a retaining force on the buckle portion to keep the buckle portion in a buckled connection with the second component.

[0021] As a further improvement, the snap-fit ​​connection is configured to overcome the retaining force to release the snap-fit ​​when an external force is applied to the first component and the second component.

[0022] As a further improvement, a control portion is provided at the outer end of the pivotal portion.

[0023] As a further improvement, the control unit is arranged in a first installation cavity formed between the paper roll storage chamber and a side surface of the prism, the side surface of the prism being a side surface adjacent to the paper outlet, and the control unit includes a PCB having an electronic circuit mounted thereon.

[0024] As a further improvement, the first component includes a first outer shell and a first inner shell, the first installation cavity is formed between the first outer shell and the first inner shell, and part of the paper roll storage chamber is formed on the inner side surface of the first inner shell.

[0025] As a further improvement, the PCB is parallel to the side surface of the prism.

[0026] As a further improvement, the driving unit includes a micro motor and a battery, and the battery is installed in a second installation cavity formed between the paper roll storage chamber and a prism, and the prism is another prism different from the two opposing prisms.

[0027] As a further improvement, the second component includes a second outer shell and a second inner shell, the second installation cavity is formed between the second outer shell and the second inner shell, and part of the paper roll storage chamber is formed on the inner side surface of the second inner shell.

[0028] As a further improvement, the battery is parallel to the prism.

[0029] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0030] 1. The present invention arranges the printing area, paper feeding channel, paper roll storage chamber and pivotal part in sequence along the joint surface between two opposite prisms. The length of this joint surface is the longest in any division direction within the prism body, which can effectively optimize the structure and make it more compact.

[0031] 2. The present invention provides more space for the paper roll storage chamber by arranging the paper outlet on the prism, so that more printing papers can be accommodated at one time.

[0032] 3. The present invention forms a first installation cavity and a second installation cavity through the paper roll storage cavity and the side surface of the prism, and arranges the control unit and the driving unit obliquely along the inner side surface of the paper roll storage chamber to reduce the length of the paper feeding channel, thereby improving the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a schematic diagram of the closed position structure of the present invention;

[0035] Figure 2 It is a schematic diagram of the structure of the open position of the present invention;

[0036] Figure 3 It is a cross-sectional schematic diagram of the centering of the present invention;

[0037] Figure 4 The present invention Figure 1 Schematic cross-sectional view of AA in the figure;

[0038] Figure 5 It is a schematic diagram of the decomposed structure of the present invention;

[0039] Figure 6 is a schematic diagram of the exploded structure of the first component of the present invention;

[0040] Figure 7 is a schematic diagram of the exploded structure of the second component of the present invention;

[0041] Figure 8 is a schematic structural diagram of the second component of the present invention from a first viewing angle;

[0042] Fig. 9 The present invention Figure 8 A schematic cross-sectional view of the middle BB when the adjustment mechanism is locked;

[0043] Fig.10 The present invention Figure 8 A cross-sectional view of the middle BB when the adjustment mechanism is unlocked;

[0044] Icons: 1. Second component; 2. First component; 3. Paper outlet; 4. Control unit; 5. Paper roll storage chamber; 6. Adjustment mechanism; 7. Thermal head; 8. Imprint roller; 9. Cutter; 10. Pivot; 11. Second inner shell; 12. Second outer shell; 13. Second installation cavity; 14. Bump; 15. Detection member; 21. First inner shell; 22. First outer shell; 23. First installation cavity; 24. Buckle; 51. Second storage cavity; 52. First storage cavity; 61. Moving rod; 62. Baffle; 63. Control rod; 91. Fixing hole; 92. Square hole; 100. Axis; 101. Transmitting unit; 102. Receiving unit; 103. Connecting shaft; 111. Storage battery; 112. Micro motor; 113. Reduction gear set; 114. Articulated unit; 200, prism; 201, opposite prism; 202, another prism; 211, isolation plate; 212, reinforcement strip; 213, PCB; 214, hinged tube; 215, accommodating chamber; 241, bottom end; 242, force-applying component; 521, sliding groove; 522, fixing block; 621, mounting groove; 622, limiting block; 623, groove; 624, inner wall; 625, reinforcement portion; 631, protrusion; 2111, fixing column; 2112, positioning block; 2151, stop strip. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0050] Example

[0051] The first direction in the present invention is the X direction and the -X direction in the drawings, the second direction is the Y direction and the -Y direction in the drawings, and the third direction is the Z direction and the -Z direction in the drawings.

[0052] Now combined Figures 1 to 10 The structure and function of the solution of this application are described in detail.

[0053] Combination Figures 1 to 3 This embodiment provides a thermal printer, including a first component 2 and a second component 1, wherein the first component 2 is provided with a thermal head 7 and a control unit for controlling the operation of the thermal head 7, and the second component 1 is provided with a platen roller 8 and a driving unit for driving the platen roller 8 to rotate. The thermal head 7 and the platen roller 8 are arranged opposite to each other to form a printing area, and the recording paper is output from a paper outlet 3 by rotating in a state where the recording paper is clamped between the two. A paper roll storage chamber 5 for storing cylindrical recording paper is formed between the first component 2 and the second component 1, and the storage chamber 5 is composed of a first storage chamber 52 provided on the first component 2 and a second storage chamber 51 provided on the second component 1, as well as a paper feeding channel connecting the paper roll storage chamber 5 and the printing area. Specifically, the printing of the printer is driven by the rotation of the platen roller 8 to output the recording paper forward, and the recording paper is stored in the paper roll storage chamber 5. While the platen roller 8 drives the recording paper forward, the recording paper also rotates in the paper roll storage chamber 5 to make it easier to transport the recording paper forward. Therefore, the recording paper is cylindrical and can rotate replaceably.

[0054] The first component 2 is configured to be able to swing relative to the second component 1 around a fixed axis 100 so that it can be converted between a closed position and an open position. In the closed position, the first component 2 and the second component 1 are interlocked to form a prism having four prisms 200, and the bonding surface formed by the first component 2 and the second component 1 is arranged between two relative prisms 201. Projected in the first direction, the printer is approximately square, and the two relative prisms 201 are just located at the two ends of the diagonal. One of the two relative prisms 201 is provided with a paper outlet 3, and the other is provided with a pivoting portion 10 for the first component 2 to pivotally connect to the second component 1. The printing area, paper feeding channel, paper roll storage chamber 5 and pivoting portion 10 are arranged in sequence along the bonding surface. Preferably, in this embodiment, the prism is a quadrangular prism, which has a simple structure and is easier to optimize. By dividing the two relative prisms 201 between the two relative prisms 201 and along the direction of the prisms 200, the bonding surface is the largest, which can effectively optimize the structure and make the structure more compact. By dividing the two relative prisms 201, it can be seen from the appearance that the first component 2 and the second component 1 are relatively symmetrical, and the positions of the pivoting part 10 are different, which is conducive to simplifying the manufacturing process. The division mentioned in this embodiment refers to the partial or complete division of the ends where the two relative prisms 201 are located or the prism 200 itself, and cannot be limited to the text itself. In the open position, the first component 2 and the second component 1 are unfastened and an opening for taking and placing cylindrical recording paper is formed between the two, and the recording paper located in the paper roll storage chamber 5 can be easily replaced through the opening. In other embodiments, the prism can be a pentagonal prism or a hexagonal prism, and its joint surface passes through two non-adjacent prisms 200.

[0055] Reference Figure 2 In the open position, the two side surfaces adjacent to the pivotal portion 10 together constitute the supporting bottom surface of the thermal printer. In this embodiment, a preferred solution is to open the printer to its maximum position so that the two side surfaces adjacent to the pivotal portion 10 are on the same plane, which can serve as the supporting bottom surface of the printer, so as to place the printer and ensure the stability of the printer when installing recording paper, without the need to use hands to help the printer stabilize to replace the recording paper.

[0056] Reference Figure 2 and Figure 3In this embodiment, due to the specific shape of the printer and the creative internal layout, the volume of the paper roll storage chamber 5 is relatively large, and more recording paper can be accommodated at one time, so that the frequency of changing the recording paper can be reduced. The shorter the length of the paper path, the shorter the time the recording paper spends in the paper path, and the problems of paper jam, paper tilt or fast and slow transmission speed of the recording paper due to the long paper path can be reduced, thereby improving the printing quality. In this embodiment, the printer has a creative shape and structural layout, so that the volume of the paper roll storage chamber 5 is more than 40% of the volume of the thermal printer, and can even reach 70%. Preferably, the volume of the paper roll storage chamber 5 is 50% of the volume of the thermal printer, which can effectively accommodate more recording paper and optimize the structural arrangement. In this embodiment, the length of the paper path is less than 3.0 cm. Preferably, the length of the paper path is 1.6 cm, which can reduce the time for the paper to pass through the paper path and improve the printing quality. In this embodiment, the paper roll storage chamber 5 is preferably a cylindrical chamber, which can cooperate with the cylindrical recording paper to reduce space waste, and its back side is arc-shaped, and other components can be arranged obliquely from the top surface to the bottom surface of the arc to make the structure compact, which can reduce its length arranged on the paper feed path, which is beneficial to reducing the length of the paper feed path.

[0057] Reference Figure 4In the closed position, the buckle portion 24 formed on the first component 2 is buckled and connected with the second component 1. In this embodiment, the buckle portion 24 is L-shaped. Specifically, a protrusion 14 that is buckled with the buckle portion 24 is provided on the second component 1. The bottom end 241 of the buckle portion 24 has an inclined inclined surface, and the top of the protrusion 14 also has an inclined cut surface. During the buckling process, the inclined surface of the buckle portion 24 will move along the cut surface of the protrusion 14, so that the buckle portion 24 rotates. A force-applying component 242 is connected to the buckle portion 24, and the force-applying component 242 applies a retaining force on the buckle portion 24 so that the buckle portion 24 maintains a buckled connection with the protrusion 14 on the second component 1. In this embodiment, the force-applying member 242 is a torsion spring. When the height of the plane of the bottom end 241 of the buckle portion 24 is less than the height of the protrusion 14, the force-applying member 242 will reset the buckle portion 24 to maintain contact with the protrusion 14, so that the first component 2 locks the second component 1. The buckle connection is configured to overcome the holding force of the force-applying member 242 when an external force is applied to the first component 2 and the second component 1 to release the buckle. In this embodiment, an unlocking button is provided, and an external force is applied to the unlocking button to rotate the buckle portion 24, so that the bottom end 241 of the buckle portion 24 rotates out from directly below the protrusion 14, so that the first component 2 can rotate along the pivot portion 10 to turn on the printer. Of course, other methods can also be used to unlock, which are conventional means and will not be repeated again. In this embodiment, a detection member 15 is provided on the second component 1. When the buckle portion 24 is buckled and connected with the second component 1, the buckle portion 24 will press down the detection member 15. The information that the first component 2 and the second component 1 are overlapped must be transmitted to the control unit before the printer can start printing. Otherwise, an error will be displayed and printing will fail, thereby improving the printing quality.

[0058] Reference Figure 1 and Figure 5 , a control part 4 is arranged at the outer end of the pivot part 10, specifically, a hinged tube 214 is arranged on the first component 2, and two hinged parts 114 are arranged on the second component 1, and the hinged tube 214 and the hinged part 114 are connected together through the connecting shaft 103 to form the pivot part 10 of the first component 2 and the second component 1. The hinged tube 214, the hinged part 114 and the connecting shaft 103 are all hollow and coaxially arranged. The control part 4 is electrically connected to the control unit through the hinged part 114, the connecting shaft 103 and the hinged tube 214, and the control unit is also electrically connected to the drive unit through the connecting part 114, the connecting shaft 103 and the hinged tube 214. By arranging the control part 4 at the outer end of the pivot part 10, the length of the electrical connection path between the control part 4 and the first component 2 or the second component 1 and the wire material can be reduced, making assembly easier.

[0059] Reference Figure 3 , Figure 6 and Figure 7The control unit is arranged in a first installation cavity 23 formed between the paper roll storage chamber 5 and the side surface of the prism, and the side surface of the prism is a side surface adjacent to the paper outlet 3, so that the connection line between the control unit and the thermal head 7 is shorter. The drive unit is arranged in a second installation cavity 13 formed between the paper roll storage chamber 5 and another side surface of the prism. The first component 2 includes a first outer shell 22 and a first inner shell 21, and the first installation cavity 23 is formed between the first outer shell 22 and the first inner shell 21, and part of the paper roll storage chamber 5 is formed on the inner side surface of the first inner shell 21; the second component 1 includes a second outer shell 12 and a second inner shell 11, and the second installation cavity 13 is formed between the second outer shell 12 and the second inner shell 11, and part of the paper roll storage chamber 5 is formed on the inner side surface of the second inner shell 11. Decorative parts can also be added to the outer side of the first outer shell 22 and the second outer shell 12. The decorative parts can be selected in different colors according to different preferences to make the appearance of the printer more beautiful, and different materials such as metal film materials can be selected to increase the strength of the printer to prevent the printer from being easily crushed due to its small size. The control unit includes a PCB 213 having an electronic circuit installed in the first installation cavity 23, the PCB 213 is parallel to the side of the prism, and the PCB 213 is arranged along the top of the paper roll storage chamber 5 and tilted toward the paper outlet 3 to compactly and reasonably utilize the internal space of the first installation cavity 23 to achieve structural optimization. The drive unit includes a micro motor 112 and a battery 111, and the battery 111 is installed directly below another prism 202 in the second installation cavity 13. The prism 200 is another prism 202 different from the two opposite prisms 201, and the battery 111 is parallel to the prism 202, so that the structural arrangement is more concise and orderly.

[0060] Reference Figure 3 and Figure 5 The first component 21 and the second component 12 are covered to sequentially form a paper roll storage chamber 5 for storing recording paper, a paper feeding passage for recording paper, a printing area formed by the opposite arrangement of the thermal head 7 and the platen roller 8, and a printing paper outlet 3. The paper feeding passage is directly formed by the joint surface of the first component 21 and the second component 12, and is used to connect the paper roll storage chamber 5 and the printing area. The control unit and the driving unit are arranged obliquely along the back of the paper roll storage chamber 5, which can reduce the length of the paper feeding passage, thereby improving the printing quality.

[0061] Reference Figure 6The first component 2 is also provided with a separation plate 211 at the end of the paper outlet 3. The separation plate 211 and the first inner shell 21 form a receiving cavity 215 for installing the thermal head 7 on the inner side. A cutter 9 is also fixed on the outer side of the separation plate 211 to cut the printed recording paper from the printer. The separation plate 211 separates the thermal head 7 and the cutter 9 to prevent the static electricity on the cutter 9 from affecting the printing quality of the thermal head 7 on the recording paper. It can be understood that the cutter 9 is basically made of metal materials, and the front end of the cutter 9 is exposed to the air for a long time, and static electricity is easily accumulated during use. If there is no separation plate 211 between the cutter 9 and the thermal head 7, it is easy for the cutter 9 to generate static electricity and affect the printing quality of the thermal head 7 on the recording paper. Installing the thermal head 7 in the receiving cavity 215 can reduce the static electricity on the cutter 9 from being transmitted to the thermal head 7, thereby improving the printing quality. In this embodiment, a preferred solution is that the isolation plate 211 and the first inner shell 21 are integrally formed of a resin material, preferably, an insulating resin material.

[0062] A positioning block 2112 and a fixing column 2111 are provided on the side of the isolation plate 211 facing the first housing 22. A square hole 92 matching the positioning block 2112 is provided on the cutter 9 to limit the left and right movement of the cutter 9 when cutting the recording paper, which is convenient for use. The cutter 9 is fixed on the isolation plate 211 by the fixing column 2111 in a hot-melt manner. The interior of the printer is generally made of plastic injection molding, and the isolation plate 211 is also made of plastic injection molding. The thickness of the cutter 9 is relatively thin. Several fixing holes 91 are opened on the cutter 9, and the fixing columns 2111 are melted on the fixing holes 91 by hot-melt, so that the cutter 9 is fixed on the isolation plate 211, so that the cutter 9 is integrated with the isolation plate 211 to prevent the vibration of the thermal head 7 during the printing process from causing the cutter 9 to fall off. Of course, other fixing methods such as screws can also be used. The isolation plate 211 is close to the paper outlet 3, so that the sawtooth end on the cutter 9 can protrude out of the paper outlet 3 to cut and separate the printed recording paper. Reference Figure 5, a stop bar 2151 is provided on the side of the isolation plate 211 facing the accommodating cavity 215 of the thermal head 7 to prevent the recording paper from entering the accommodating cavity 215 when it is retreated. Specifically, since the thermal head 7 will vibrate up and down during the printing process, the front end of the thermal head 7 installed in the accommodating cavity 215 will not abut against the isolation plate 211, and there will be a gap between the isolation plate 211, so that when the recording paper is printed and cut and separated by the cutter 9, the front end of the recording paper will be flush with the recording paper outlet 3. Since the recording paper is pulled upward when it is cut, the front end of the recording paper will roll up during the retreat process, which makes it easy for the front end of the recording paper to enter the accommodating cavity 215 through the gap. The stop bar 2151 is provided on the isolation plate 211 to prevent the recording paper from rolling into the accommodating cavity 215 after printing again, thereby preventing paper jams. Preferably, there are at least 4 stop bars 2151, and the stop bars 2151 are spaced apart, so that when the recording paper is retracted, there will be multiple support points, which can greatly reduce the occurrence of paper jams caused by the recording paper entering the accommodating cavity 215 when the recording paper is retracted. A reinforcing bar 212 is provided in the accommodating cavity 215 to increase the strength of the front end of the first inner shell 21. Preferably, the reinforcing bar 212 is made of hard metal to prevent the front end of the first inner shell 21 from being deformed due to the heating of the thermal head 7, resulting in a change in the height of the paper path and affecting the output of the recording paper.

[0063] Reference Figure 7 The second component 1 is also provided with a reduction gear set 213, which is connected to the micro motor 212 and the embossing roller 8. The micro motor 212 drives the reduction gear set 213 to rotate to drive the embossing roller 8 to rotate.

[0064] Reference Figure 8 , Fig. 9 and Fig.10 The paper roll storage chamber 5 of the second component 152 is provided with a paper width adjustment mechanism 6, a moving rod 61 and a sliding groove 521. The paper width adjustment mechanism 6 is provided on the moving rod 61 and can move along the moving rod 61 and the sliding groove 521 to adapt to recording papers of different paper widths. The moving rod 61 crosses the entire width of the second component 152 and is fixed on both sides of the second component 152. The lower end of the sliding groove 521 is an arc-shaped curved surface, and the upper end is a straight plane, so that the lower end can slide better when the paper width adjustment mechanism 6 is unlocked, and the upper end can be better restricted when the paper width adjustment mechanism 6 is locked.

[0065] The adjustment mechanism 6 includes a baffle 62 and a control rod 63. The baffle 62 is arranged on the moving rod 61 and can move left and right along the moving rod 61. Specifically, a through hole for the moving rod 61 to pass through is opened at the front end of the baffle 62, so that the baffle 62 is sleeved on the moving rod 61, and a shape consistent with the shape of the sliding groove 521 is provided at the rear end of the baffle 62. When in use, the rear end of the baffle 62 is stuck in the sliding groove 521 and can move along any prism 200 direction. The lower end of the baffle 62 has an arc-shaped portion that matches the paper roll storage chamber 5 so that the baffle 62 and the paper roll storage chamber 5 are tightly attached. A control rod 63 mounting groove 621 is provided on the baffle 62. The control rod 63 is arranged in the mounting groove 621 and is pivotally connected to the moving rod 61. The baffle 62 is locked by the control rod 63 to be fixed on the moving rod 61. Specifically, refer to Fig. 9 and Fig.10 A stopper 622 is provided in the mounting groove 621. When the control rod 63 swings downward, the control rod 63 contacts the inner wall 624 of the mounting groove 621 in an interference fit manner to fix the stopper 62 on the moving rod 61. At the same time, the rear end of the stopper 62 contacts the middle of the sliding groove 521 to limit the movement of the stopper 62 in the second direction. In order to prevent the control rod 63 from swinging back, a stopper 622 is provided in the mounting groove 621. When the control rod 63 swings downward to lock the stopper 62, the stopper 622 just contacts the side wall of the control rod 63 to prevent the control rod 63 from rotating around the moving rod 61 and swinging back. When the control rod 63 swings upward, the control rod 63 and the inner wall 624 of the installation groove 621 will be clearance-matched, so that the moving rod 61 and the baffle 62 are unlocked, and the baffle 62 can move along the moving rod 61. Two inclined grooves 623 are also provided in the installation groove 621. The control rod 63 is provided with a protrusion 631 that matches the two grooves 623. The protrusion 631 is elastically connected to the control rod 63. Under the action of external force, the control rod 63 can rotate, otherwise, the protrusion 631 will abut against the side wall of the groove 623 to fix the control rod 63. The adjustment mechanism 6 moves along the moving rod 61 and the sliding groove 521 to adapt to recording papers of different paper widths, and then the control rod 63 locks the baffle 62. The baffle 62 and the control rod 63 are interference-matched to directly lock the moving rod 61, thereby realizing the adjustment and fixation of the recording paper width of the paper roll storage chamber 5. In this way, the recording paper is stably fixed after adjustment, and the operation is simple.

[0066] like Fig.10 As shown, the baffle plate 62 is provided with a mounting groove 621 for the control rod 63, so that the portion where the baffle plate 62 contacts the moving rod 61 is too small when the baffle plate 62 is in interference fit. In order to prevent loosening, a reinforcement portion 625 is formed by extending the baffle plate 62 along the direction of the moving rod 61. The reinforcement portion 625 has a curved surface adapted to a certain direction of the moving rod 61, so that when the control rod 63 locks the baffle plate 62, the reinforcement portion 625 completely contacts the moving rod 61.

[0067] If the width of the recording paper is too small, the width of the paper path is constant during the printing process. The smaller the width of the recording paper, the easier it is to deviate on the paper path, which will cause errors during printing and affect the printing quality. Therefore, it is necessary to set a minimum paper width. A fixed block 522 is provided on the sliding groove 521 to limit the movement of the baffle 62 to form a recording paper roll storage chamber 5 with a minimum paper width.

[0068] Reference Figure 2 A detection device for detecting recording paper information is provided on the paper feeding channel, and the detection device includes a transmitting unit 101 and a receiving unit 102, one of which is provided on the first component 22, and the other is provided on the second component 11. When the transmitting unit 101 detects that the recording paper passes through the paper feeding channel, the transmitting unit 101 transmits the information to the receiving unit 102, and the receiving unit 102 provides the information to PCB213 after receiving the information.

[0069] The above are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

Claims

1. A thermal printer comprising a first component and a second component; in, The first component is equipped with a thermal head and a control unit for controlling the operation of the thermal head; Wherein, the second component is equipped with an embossing roller and a driving unit for driving the embossing roller to rotate; The thermal head and the platen roller are arranged opposite to each other to form a printing area, and the recording paper is output from the paper outlet by rotating with the recording paper sandwiched between them; A paper roll storage chamber for storing cylindrical recording paper and a paper feeding passage connecting the paper roll storage chamber and the printing area are formed between the first component and the second component; The first component is configured to be able to swing relative to the second component about a fixed axis so as to be convertible between a closed position and an open position; Features: In the closed position, the first component and the second component are interlocked with each other to form a prism body having at least four prisms, and the joint surface formed by the first component and the second component is arranged between two opposing prisms, one of the two opposing prisms is provided with a paper outlet, and the other of the two opposing prisms is provided with a pivoting portion for the first component to be pivotally connected to the second component, and the printing area, the paper feeding channel, the paper roll storage chamber and the pivoting portion are arranged in sequence along the joint surface; In the open position, the first component and the second component are unfastened and an opening for taking in and placing the cylindrical recording paper is formed between the two components; The control unit is arranged in a first installation cavity formed between the paper roll storage chamber and the side surface of the prism body; A detection device for detecting information on recording paper is provided on the paper feeding passage.

2. The thermal printer according to claim 1, characterized in that: The prism is a quadrangular prism, and the joining surface divides the two opposite prisms along the prism direction.

3. The thermal printer according to claim 1 or 2, characterized in that: In the open position, two side surfaces adjacent to the pivotal portion together constitute a supporting bottom surface of the thermal printer.

4. The thermal printer according to claim 1, characterized in that: The length of the paper feeding channel is less than 3.0 cm.

5. The thermal printer according to claim 1 or 4, characterized in that: The volume of the paper roll storage chamber is 40%-70% of the volume of the thermal printer.

6. The thermal printer according to claim 5, characterized in that: The paper roll storage chamber is a cylindrical chamber.

7. The thermal printer according to claim 1, characterized in that: In the closed position, the buckle portion formed on the first component is buckled and connected with the second component.

8. The thermal printer according to claim 7, characterized in that: The buckle portion is connected with a force-applying component, and the force-applying component applies a retaining force on the buckle portion so that the buckle portion maintains a buckling connection with the second component.

9. The thermal printer according to claim 8, characterized in that: The snap-fit ​​connection is configured to be able to overcome the retaining force to release the snap-fit ​​connection when an external force is applied to the first component and the second component.

10. The thermal printer according to claim 1, characterized in that: A control portion is arranged at the outer end of the pivoting portion.

11. The thermal printer according to claim 1, characterized in that: The side surface of the prism is a side surface adjacent to the paper outlet, and the control unit includes a PCB having an electronic circuit mounted thereon.

12. The thermal printer according to claim 11, characterized in that: The first component 2 includes a first outer shell and a first inner shell, the first installation cavity is formed between the first outer shell and the first inner shell, and part of the paper roll storage chamber is formed on the inner side surface of the first inner shell.

13. The thermal printer according to claim 11 or 12, characterized in that: The PCB is parallel to the side surface of the prism.

14. The thermal printer according to claim 1, 11 or 12, characterized in that: The driving unit includes a micro motor and a battery. The battery is installed in a second installation cavity formed between the paper roll storage chamber and a prism, and the prism is another prism different from the two opposite prisms.

15. The thermal printer according to claim 14, characterized in that: The second component includes a second outer shell and a second inner shell, the second installation cavity is formed between the second outer shell and the second inner shell, and part of the paper roll storage chamber is formed on the inner side surface of the second inner shell.

16. The thermal printer according to claim 14, characterized in that: The battery is parallel to the prism.

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