Handheld thermal printer

Abstract

A handheld thermal printer comprises a base and a turning cover hinged to the base, a circuit board is arranged in the turning cover, a paper bin is arranged in the base, a first paper blocking plate and a second paper blocking plate are arranged on the left side and the right side of the paper bin respectively, and at least one of the first paper blocking plate and the second paper blocking plate is arranged to be a movable paper blocking plate capable of moving left and right along the paper bin. Therefore, different paper roll widths can be adapted; the paper roll width detection assembly comprises a trigger switch and a trigger part; the trigger switch is electrically connected to the circuit board; the trigger part is at least arranged on one movable paper baffle; a plurality of trigger switches corresponding to different moving positions are arranged corresponding to at least one movable paper baffle provided with the trigger part; and when the flip cover covers the base, the trigger part on the first paper baffle and / or the second paper baffle triggers the trigger switch at the corresponding position. The handheld thermal printer can automatically detect the width of the paper roll of the printing paper, so that the operation is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of printer technology, specifically to a handheld thermal printer. Background Technology

[0002] Handheld thermal printers are widely used in various industries such as retail, logistics, healthcare, and catering, meeting the needs of different scenarios. Chinese utility model patent CN211542930U discloses a handheld thermal printer, including a housing, a flip cover, and a printing assembly. The flip cover is hinged to the housing. The printing assembly includes a rubber roller and a thermal sheet. The housing has a paper tray, within which are a fixed roller, a first guide plate, and a second guide plate. The fixed roller passes through the first and second guide plates. This handheld thermal printer places printing paper between the first and second guide plates in the paper tray and drives either the first or second guide plate to move. The distance between the first and second guide plates can be adjusted to accommodate different paper sizes.

[0003] However, existing handheld thermal printers still have the following technical problems: although they can adapt to different sizes of printing paper, they do not automatically detect the width of the paper roll, which means that the size of the printing paper needs to be manually entered when printing, making the operation very inconvenient. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a handheld thermal printer that can automatically detect the width of the paper roll, making operation more convenient.

[0005] The technical solution of this utility model is: a handheld thermal printer, including a base and a hinged cover, the hinged cover containing a circuit board, the base containing a paper tray, and a first guide plate and a second guide plate respectively on the left and right sides of the paper tray, at least one of the first guide plate and the second guide plate being a movable guide plate that can move left and right along the paper tray to accommodate different paper roll widths; it also includes...

[0006] A paper roll width detection component, comprising a trigger switch and a trigger unit;

[0007] The trigger switch is electrically connected to the circuit board;

[0008] The triggering part is provided on at least one of the movable baffle plates; at least one movable baffle plate with the triggering part is provided with a plurality of trigger switches corresponding to its different moving positions;

[0009] When the flip cover is closed on the base, the trigger portion on the first and / or second baffle plate triggers the trigger switch at the corresponding position.

[0010] With the above structure, this utility model has the following advantages:

[0011] This handheld thermal printer, by setting a trigger part on a movable guide plate and setting multiple trigger switches on the circuit board corresponding to the movable guide plate, can automatically detect the current movement position of the movable guide plate. Different positions of the movable guide plate correspond to different widths of the paper roll, thereby realizing automatic detection of the paper roll width. Since the width of the printing paper is automatically detected and identified by the machine, there is no need for manual input or setting, making the operation more convenient.

[0012] Preferably, both the first and second paper guides are movable paper guides, and they are symmetrically installed in the paper tray. This arrangement ensures that the printing paper is always in the center of the paper tray, resulting in better paper output and printing quality.

[0013] Preferably, the first and second guide rails have identical structures and both are equipped with the trigger portion. This arrangement eliminates the need to distinguish between the first and second guide rails during installation, making installation more convenient and preventing the paper roll width detection function from malfunctioning due to incorrect installation.

[0014] Preferably, both the first and second guide plate sections include a plate body. A first protrusion and an elastic portion are respectively provided on the front and rear sides of the plate body. The paper tray has a first limiting groove that can engage the first protrusion. When the plate body is installed into the paper tray, the elastic portion deforms, causing the first protrusion to engage with the first limiting groove. The first protrusion and the first limiting groove limit the plate body within the paper tray. The limiting structure is simple, and the elastic portion facilitates the engagement of the first protrusion with the first limiting groove. Furthermore, after the plate body is installed, it continuously provides a pressing force to the first protrusion and the first limiting groove, making the limiting of the plate body more reliable.

[0015] Preferably, the elastic part is further provided with a second protrusion. The first protrusion and the second protrusion are respectively located on the front and rear sides of the board body. The paper tray is provided with a second limiting groove that can engage the second protrusion. When the board body is installed into the paper tray, the elastic part deforms, causing the first protrusion to engage with the first limiting groove and the second protrusion to engage with the second limiting groove. This arrangement ensures that both the front and rear sides of the board body are limited by the protrusions and the limiting grooves, thereby allowing the first and second paperboard blocks to be more reliably fixed inside the paper tray.

[0016] Preferably, the left and right sides of the paper compartment are symmetrically provided with multiple positioning grooves corresponding to different paper roll widths. Each positioning groove contains a first limiting groove and a second limiting groove. Both the first limiting groove and the second limiting groove are through grooves. When the plate is installed into the positioning groove of the paper compartment, the first protrusion engages with the first limiting groove, and the second protrusion engages with the second limiting groove. This arrangement allows the positioning grooves to first limit the plate, thereby facilitating the positioning of the first protrusion with the first limiting groove and the second protrusion with the second limiting groove.

[0017] Preferably, one end of the elastic part is fixed to the bottom of the plate and the other end extends upward along the outer side of the plate, with a gap between the elastic part and the plate. This elastic part has a simple structure and strong deformation capacity.

[0018] Preferably, the trigger portion is formed at the end of the elastic portion. Directly forming the trigger portion from the end of the elastic portion simplifies the structure, and the elastic portion's inherent elasticity allows for better pressing of the trigger switch.

[0019] Preferably, the end of the elastic part is further provided with a serrated surface. The end of the elastic part is the position for picking up the plate, and the serrated surface can increase the friction with the fingers, making it less likely to fall when picked up.

[0020] Preferably, the second protrusion is positioned below the first protrusion. This arrangement is reasonable and provides better limiting effect. Attached image description:

[0021] Figure 1 This is a schematic diagram of the structure of the handheld thermal printer of this utility model;

[0022] Figure 2 This is an exploded view of the handheld thermal printer of this utility model;

[0023] Figure 3 This is a top view of the handheld thermal printer of this utility model;

[0024] Figure 4 for Figure 3 A sectional view at point AA';

[0025] Figure 5 for Figure 3 Cross-sectional view at point BB';

[0026] Figure 6 This is a schematic diagram of the flip-top structure of the handheld thermal printer of this utility model.

[0027] Figure 7 This is a schematic diagram of the assembly of the paper tray, the first paperboard, and the second paperboard of the handheld thermal printer of this utility model.

[0028] Figure 8 This is a schematic diagram of the structure of the first paperboard of the thermal printer of this utility model;

[0029] In the diagram: 1-base, 2-flip cover, 3-circuit board, 4-paper tray, 5-first guide plate, 6-second guide plate, 7-trigger switch, 8-trigger part, 9-plate body, 10-first protrusion, 11-elastic part, 12-first limiting groove, 13-second protrusion, 14-second limiting groove, 15-positioning groove, 16-serrated surface, 17-locking assembly, 18-button, 19-rubber roller, 20-thermal sheet, 21-printing paper. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Example:

[0032] like Figure 1-8 As shown, a handheld thermal printer includes a base 1 and a hinged cover 2. The hinged cover 2 houses a circuit board 3. The base 1 houses a paper tray 4. A first guide plate 5 and a second guide plate 6 are respectively located on the left and right sides of the paper tray 4. At least one of the first guide plate 5 and the second guide plate 6 is configured as a movable guide plate that can move left and right along the paper tray 4 to accommodate different paper roll widths. It also includes...

[0033] A paper roll width detection component, which includes a trigger switch 7 and a trigger part 8;

[0034] Trigger switch 7 is electrically connected to circuit board 3;

[0035] A trigger part 8 is provided on at least one of the movable baffle plates; a plurality of trigger switches 7 corresponding to different moving positions are provided on at least one of the movable baffle plates provided with the trigger part 8;

[0036] When the flip cover 2 is closed on the base 1, the trigger part 8 on the first stop plate 5 and / or the second stop plate 6 triggers the trigger switch 7 at the corresponding position.

[0037] When one of the first baffle plate 5 and the second baffle plate 6 is a fixed baffle plate and the other is a movable baffle plate, the trigger part 8 is provided on the movable baffle plate, and multiple trigger switches 7 corresponding to different moving positions of the movable baffle plate are provided. When both the first baffle plate 5 and the second baffle plate 6 are movable baffle plates, the trigger part 8 can be provided on the first baffle plate 5, or on the second baffle plate 6, or on both the first baffle plate 5 and the second baffle plate 6. When both the first baffle plate 5 and the second baffle plate 6 are movable baffle plates and both are provided with trigger parts 8, multiple trigger switches 7 corresponding to different moving positions of the first baffle plate 5 can be provided, multiple trigger switches 7 corresponding to different moving positions of the second baffle plate 6 can be provided, or multiple trigger switches 7 corresponding to different moving positions of the first baffle plate 5 and the second baffle plate 6 can be provided respectively. In this embodiment, both the first baffle plate 5 and the second baffle plate 6 are movable baffle plates and both are provided with trigger parts 8, but multiple trigger switches 7 corresponding to different moving positions of the first baffle plate 5 are only provided.

[0038] In this embodiment, the handheld thermal printer automatically detects the current movement position of the movable guide plate by setting a trigger part 8 on the movable guide plate and setting multiple trigger switches 7 on the circuit board 3 corresponding to the movable guide plate. Different positions of the movable guide plate correspond to different widths of the paper roll, thereby realizing automatic detection of the paper roll width. Since the width of the printing paper 21 is automatically detected and identified by the machine, no manual input or setting is required, making operation more convenient. In this embodiment, up / down, left / right, front / back... Figure 2 As the standard.

[0039] Both the first and second paperboard sections 5 and 6 are movable, and they are symmetrically installed in the paper tray 4. This arrangement ensures that the printing paper 21 is always in the center of the paper tray 4, resulting in good paper output and printing quality.

[0040] The first guide plate 5 and the second guide plate 6 have the same structure and both are equipped with a trigger part 8. This design eliminates the need to distinguish between the first guide plate 5 and the second guide plate 6 during installation, making installation more convenient and preventing the paper roll width detection function from malfunctioning due to incorrect installation.

[0041] Both the first guide plate 5 and the second guide plate 6 include a plate body 9. A first protrusion 10 and an elastic part 11 are respectively provided on the front and rear sides of the plate body 9. The paper tray 4 is provided with a first limiting groove 12 that can engage the first protrusion 10. When the plate body 9 is installed into the paper tray 4, the elastic part 11 deforms, causing the first protrusion 10 to engage into the first limiting groove 12. The first protrusion 10 and the first limiting groove 12 limit the plate body 9 within the paper tray 4. The limiting structure is simple. The elastic part 11 facilitates the engagement of the first protrusion 10 into the first limiting groove 12 and continuously provides a pressing force on the first protrusion 10 against the first limiting groove 12 after the plate body 9 is installed, making the limiting of the plate body 9 more reliable.

[0042] The elastic part 11 is also provided with a second protrusion 13. The first protrusion 10 and the second protrusion 13 are respectively located on the front and rear sides of the plate body 9. The paper tray 4 is provided with a second limiting groove 14 that can engage the second protrusion 13. When the plate body 9 is installed into the paper tray 4, the elastic part 11 deforms, causing the first protrusion 10 to engage into the first limiting groove 12 and the second protrusion 13 to engage into the second limiting groove 14. This arrangement allows both the front and rear sides of the plate body 9 to be limited by the protrusions and limiting grooves, thereby enabling the first guide plate 5 and the second guide plate 6 to be more reliably fixed in the paper tray 4.

[0043] Multiple positioning grooves 15 corresponding to different paper roll widths are symmetrically arranged on the left and right sides of the paper tray 4. Each positioning groove 15 contains a first limiting groove 12 and a second limiting groove 14. Both the first limiting groove 12 and the second limiting groove 14 are through grooves. When the plate 9 is installed into the positioning groove 15 of the paper tray 4, the first protrusion 10 engages with the first limiting groove 12, and the second protrusion 13 engages with the second limiting groove 14. In this embodiment, three positioning grooves 15 are provided on the left and right sides of the paper tray 4, which can simultaneously meet the printing needs of three sizes of printing paper 21. This arrangement can use the positioning grooves 15 to limit the plate 9 first, thereby making it easier to position the first protrusion 10 and the first limiting groove 12, as well as the second protrusion 13 and the second limiting groove 14.

[0044] One end of the elastic part 11 is fixed to the bottom of the plate 9, and the other end extends upward along the outer side of the plate 9. There is a gap between the elastic part 11 and the plate 9. In this embodiment, the elastic part 11 is formed by cutting the plate 9. The elastic part 11 has a simple structure and strong deformation ability.

[0045] The trigger part 8 is formed at the end of the elastic part 11. By directly forming the trigger part 8 at the end of the elastic part 11, the structure is further simplified, and the elastic part 11 has a certain elasticity, which makes the pressing effect of the trigger part 8 on the trigger switch 7 better.

[0046] The end of the elastic part 11 is also provided with a serrated surface 16. The end of the elastic part 11 is the position for picking up the plate. The serrated surface 16 can increase the friction with the fingers and make it less likely to fall when picking it up.

[0047] The second protrusion 13 is positioned below the first protrusion 10. This arrangement is reasonable and provides better limiting effect.

[0048] In this embodiment, the first protrusion 10 is disposed on the rear side of the plate 9, the elastic part 11 is disposed on the front side of the plate 9, and the second protrusion 13 is disposed on the front side of the elastic part 11; the rear side of the flip cover 2 is hinged to the rear side of the base 1; a locking assembly 17 is also provided between the flip cover 2 and the base 1, and a button 18 is also provided on the front side of the base 1; when the button 18 is pressed, the locking assembly 17 is unlocked, and the flip cover 2 can be flipped up and down relative to the base 1; the paper tray 4 is disposed on the rear side of the base 1, a rubber roller 19 is also provided on the front side of the base 1, and a thermal sheet 20 is also provided on the front side of the flip cover 2; a paper feeding channel is formed between the rubber roller 19 and the thermal sheet 20, and the paper tray 4 is connected to the paper feeding channel.

[0049] The working principle of the handheld thermal printer in this embodiment is as follows:

[0050] During normal use, the locking assembly 17 locks the flip cover 2 onto the base 1, and the printing paper 21 in the paper tray 4 is printed out through the paper feed channel. When it is necessary to change the size of the printing paper 21 in the paper tray 4, press the button 18, the locking assembly 17 unlocks, flip the flip cover 2 upwards, take out the printing paper 21 in the paper tray 4, and then pull out the first guide plate 5 and the second guide plate 6. Then install the first guide plate 5 and the second guide plate 6 into the positioning groove 15 corresponding to the width of the paper roll. During the installation process, the elastic part 11 deforms, the first protrusion 10 is inserted into the first limiting groove 12, and the second protrusion 13 is inserted into the second limiting groove 14. Then place the new printing paper 21 between the first guide plate 5 and the second guide plate 6. Close the flip cover 2 again, and the flip cover 2 and the base 1 are locked together again by the locking assembly 17. At the same time, the trigger part 8 at the end of the elastic part 11 of the first guide plate 5 triggers the trigger switch 7 at the corresponding position. Since the trigger switch 7 at different positions corresponds to different paper roll widths, the automatic detection of the paper roll width is realized.

Claims

1. A handheld thermal printer, comprising a base (1) and a flip cover (2) hinged to the base (1), wherein a circuit board (3) is provided inside the flip cover (2), and a paper tray (4) is provided inside the base (1). A first guide plate (5) and a second guide plate (6) are respectively provided on the left and right sides of the paper tray (4), wherein at least one of the first guide plate (5) and the second guide plate (6) is configured as a movable guide plate that can move left and right along the paper tray (4) to accommodate different paper roll widths; characterized in that: Also includes A paper roll width detection component, comprising a trigger switch (7) and a trigger part (8); The trigger switch (7) is electrically connected to the circuit board (3); The trigger part (8) is provided on at least one of the movable baffle plates; at least one movable baffle plate provided with the trigger part (8) is provided with a plurality of trigger switches (7) corresponding to its different moving positions; When the flip cover (2) is closed on the base (1), the trigger part (8) on the first baffle (5) and / or the second baffle (6) triggers the trigger switch (7) at the corresponding position.

2. A handheld thermal printer according to claim 1, characterized in that: Both the first baffle plate (5) and the second baffle plate (6) are movable baffle plates, and they are installed symmetrically in the paper bin (4).

3. A handheld thermal printer according to claim 2, characterized in that: The first baffle plate (5) and the second baffle plate (6) have the same structure and both are provided with the trigger part (8).

4. A handheld thermal printer according to claim 3, characterized in that: Both the first baffle plate (5) and the second baffle plate (6) include a plate body (9). The front and rear sides of the plate body (9) are respectively provided with a first protrusion (10) and an elastic part (11). The paper tray (4) is provided with a first limiting groove (12) that can engage the first protrusion (10). When the plate body (9) is installed on the paper tray (4), the elastic part (11) deforms and the first protrusion (10) engages in the first limiting groove (12).

5. A handheld thermal printer according to claim 4, characterized in that: The elastic part (11) is also provided with a second protrusion (13). The first protrusion (10) and the second protrusion (13) are located on the front and rear sides of the plate (9) respectively. The paper tray (4) is provided with a second limiting groove (14) that can engage the second protrusion (13). When the plate (9) is installed on the paper tray (4), the elastic part (11) deforms, causing the first protrusion (10) to engage in the first limiting groove (12) and the second protrusion (13) to engage in the second limiting groove (14).

6. A handheld thermal printer according to claim 5, characterized in that: The paper tray (4) is also symmetrically provided with multiple positioning grooves (15) corresponding to different paper roll widths on its left and right sides. Each positioning groove (15) is provided with a first limiting groove (12) and a second limiting groove (14). The first limiting groove (12) and the second limiting groove (14) are both through grooves. When the plate (9) is installed into the positioning groove (15) of the paper tray (4), the first protrusion (10) is inserted into the first limiting groove (12) and the second protrusion (13) is inserted into the second limiting groove (14).

7. A handheld thermal printer according to claim 4, characterized in that: One end of the elastic part (11) is fixed to the bottom of the plate (9) and the other end extends upward along the outside of the plate (9), and there is a gap between the elastic part (11) and the plate (9).

8. A handheld thermal printer according to claim 7, characterized in that: The trigger portion (8) is formed at the end of the elastic portion (11).

9. A handheld thermal printer according to claim 7, characterized in that: The end of the elastic part (11) is also provided with a serrated surface (16).

10. A handheld thermal printer according to claim 5, characterized in that: The second protrusion (13) is disposed below the first protrusion (10).

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