Printer

Abstract

The utility model discloses a printer. A cavity is used for placing printing paper; the cover plate is rotationally connected with the shell, the cover plate can move to an opening position and a closing position relative to the shell, and a mounting seat is arranged on the cover plate; a rubber roller is arranged on the connecting rod, the connecting rod is rotatably arranged on the mounting seat, and the axial direction of the connecting rod is a first direction; the buckle assembly comprises a mounting bracket and a first mounting frame, the mounting bracket is fixedly arranged in the shell, and the first mounting frame is rotationally connected with the mounting bracket and is configured to be capable of moving to an initial position and an unlocking position; the printing head is arranged on the buckle assembly; when the cover plate is in the closed position, the first mounting frame is configured to be in the initial position and matched with the connecting rod in a clamped mode, a paper feeding channel is formed between the rubber roller and the printing head, and the paper feeding channel communicates with the cavity and rotates around the axis of the paper feeding channel through the connecting rod. And the rubber roller is driven to rotate so as to drive the printing paper in the cavity to penetrate out of the cavity from the paper feeding channel.

Description

Technical Field

[0001] This application belongs to the field of printing technology, and in particular relates to a printer. Background Technology

[0002] In recent years, with the rapid development of business models such as food delivery and fast goods delivery, related supporting equipment has emerged to improve the accuracy of order preparation and delivery processes. Quick-dry printers are one such important piece of equipment, used to print relevant order information so that merchants and delivery personnel can accurately obtain order and delivery details.

[0003] These types of express printers are typically used by businesses in the food and beverage industry with high volumes of takeout orders. Unlike regular commercial printers and POS printers, express printers designed for the takeout business model are characterized by high print volume, variable location, and noisy surrounding environments. Especially in terms of high print volume, due to the large number of takeout orders, the printer frequently needs to be refilled, and the printer cover needs to be opened and closed frequently.

[0004] Currently, printer covers require locking mechanisms to keep them in the closed position when closed, and the rubber rollers require separate connectors to secure them to the inside of the casing or the cover. The printer has many internal components, resulting in a complex structure and a large size, which is not conducive to achieving lightweight design and is not convenient when opening the cover to refill paper or restarting the printer.

[0005] It is necessary to improve these types of quick printers to adapt to the application needs of the food delivery business model. Utility Model Content

[0006] The purpose of this application is to provide a printer.

[0007] According to a first aspect of the embodiments of this application, a printer is provided, comprising:

[0008] A housing having a cavity for holding printing paper;

[0009] A cover plate, which is rotatably connected to the housing, is movable relative to the housing to an open position and a closed position, and is provided with a mounting base on the cover plate;

[0010] A connecting rod, on which a rubber roller is provided, is rotatably mounted on the mounting base, and the axial direction of the connecting rod is a first direction;

[0011] A snap-fit ​​assembly, comprising a mounting bracket and a first mounting bracket, wherein the mounting bracket is fixedly disposed inside the housing, and the first mounting bracket is rotatably connected to the mounting bracket and configured to be movable to an initial position and an unlocked position;

[0012] A print head, wherein the print head is disposed on the snap-fit ​​assembly;

[0013] With the cover plate in the closed position, the first mounting bracket is configured to be in the initial position and engage with the connecting rod. A paper feeding channel is formed between the rubber roller and the print head. The paper feeding channel communicates with the cavity. The connecting rod rotates around its own axis, driving the rubber roller to rotate and drive the printing paper in the cavity to pass through the paper feeding channel to the outside of the cavity.

[0014] Optionally, the housing is provided with a first mounting portion, and the first mounting portion has a first through hole;

[0015] The cover plate is provided with a second mounting part, and the second mounting part has a second through hole, the first through hole and the second through hole are concentric;

[0016] A pin is inserted into the first through hole and the second through hole so that the cover plate can rotate about the axis of the pin to be in the open position or the closed position.

[0017] Optionally, the printer further includes a blocking member, which is detachably disposed in the housing and is used to prevent the pin from disengaging from the first through hole and the second through hole.

[0018] Optionally, when the first mounting bracket has moved from the initial position to the unlocked position, the latching assembly can be separated from the connecting rod so that the cover can be removed from the closed position.

[0019] Optionally, the connecting rod includes a first extension and a second extension, and along the first direction, the first extension and the second extension are respectively located on both sides of the rubber roller;

[0020] The buckle assembly further includes an unlocking component. The mounting bracket is provided with a first slot and a second slot, the first slot and the second slot being spaced apart in a first direction. The first mounting bracket is provided with a third slot and a fourth slot, the third slot being adjacent to the first slot and the fourth slot being adjacent to the second slot. The unlocking component is rotatably connected to the mounting bracket and abuts against the first mounting bracket.

[0021] When the cover is in the closed position, the first extension is engaged between the first slot and the third slot, and the second extension is engaged between the second slot and the third slot.

[0022] By rotating the unlocking component, the first mounting bracket can be driven to move from the initial position to the unlocked position, the first extension can disengage from the first slot and the third slot, and the second extension can disengage from the second slot and the fourth slot.

[0023] Optionally, the height direction of the printer is a third direction, and the direction perpendicular to the first direction and the third direction is a second direction;

[0024] The first mounting bracket includes a first mounting plate, a second mounting plate, and a third mounting plate. The first mounting plate includes a first end, a second end, and a first connecting portion. The third slot is formed in the first mounting plate and located between the first connecting portion and the first end. The first mounting plate is rotatably connected to the mounting bracket at the first connecting portion. The second mounting plate includes a third end, a fourth end, and a second connecting portion. The fourth slot is formed in the second mounting plate and located between the second connecting portion and the third end. The second mounting plate is rotatably connected to the mounting bracket at the second connecting portion. One end of the third mounting plate is connected to the second end, and the other end of the third mounting plate is connected to the fourth end.

[0025] By rotating the unlocking component, the first mounting bracket can be driven to move from the initial position to the unlocked position, the third mounting plate moves upward in the third direction, the first end moves downward in the third direction, the first extension can disengage from the first slot and the third slot, the third end moves downward in the third direction, and the second extension can disengage from the second slot and the fourth slot.

[0026] Optionally, the first slot includes a first sidewall, which includes a first segment and a second segment. The plane of the first segment is parallel to the plane containing the third direction, and the second segment is an arc surface. The third slot includes a second sidewall, which includes a third segment, a fourth segment, and a fifth segment connected in sequence. The plane of the third segment intersects with the plane containing the third direction, and the fourth segment is an arc surface. The fifth segment is tangent to the fourth segment, and the second segment is disposed opposite to the fourth segment. When the cover is in the closed position, the first extension segment is located between the second segment, the fourth segment, and the fifth segment.

[0027] The second slot includes a third sidewall, which comprises a sixth, a seventh, and an eighth segment connected in sequence. The plane of the sixth segment intersects with the plane containing the third direction, the plane of the seventh segment is parallel to the plane containing the third direction, and the eighth segment is an arc surface. The fourth slot includes a ninth, a tenth, and an eleventh segment connected in sequence. The plane of the ninth segment intersects with the plane containing the third direction, the tenth segment is an arc surface, and the eleventh segment is tangent to the tenth segment. When the cover is in the closed position, the second extension segment is located between the eighth, tenth, and eleventh segments.

[0028] Optionally, when the first mounting bracket is in the initial position, the second sidewall protrudes into the first slot in the second direction, and the fourth sidewall protrudes into the second slot in the second direction;

[0029] When the first mounting bracket is in the unlocked position, the second sidewall does not coincide with the first slot, and the fourth sidewall does not coincide with the second slot.

[0030] Optionally, the snap-fit ​​assembly further includes a second mounting bracket and an elastic element, wherein the second mounting bracket and the third mounting plate are spaced apart in a second direction, and the elastic element is disposed between the third mounting plate and the second mounting bracket;

[0031] By pressing the unlocking element to drive the first mounting bracket to move from the initial position to the unlocked position, the first mounting bracket compresses the elastic element in the second direction;

[0032] By releasing the unlocking element, the elastic element causes the first mounting bracket to return from the unlocked position to the initial position.

[0033] Optionally, the printer further includes a switch assembly disposed in the housing, the switch assembly abutting against the unlocking member, and the unlocking member can be pressed by the switch assembly.

[0034] Optionally, the second mounting bracket is disposed between the first mounting plate and the second mounting plate, the second mounting bracket is rotatably connected to the mounting support, and the print head is disposed on the side of the second mounting bracket away from the first mounting bracket.

[0035] Optionally, the mounting base is provided with a first mounting groove and a second mounting groove, wherein the first mounting groove and the second mounting groove are spaced apart in the first direction;

[0036] A portion of the first extension section is engaged in the first mounting groove, and a portion of the second extension section is engaged in the second mounting groove. The outer diameter of the first extension section is smaller than the inner diameter of the first mounting groove, and the outer diameter of the second extension section is smaller than the inner diameter of the first mounting groove.

[0037] The connecting rod is configured to oscillate relative to the mounting base in a direction perpendicular to the first direction.

[0038] Optionally, the height direction of the printer is a third direction, and the direction perpendicular to the first direction and the third direction is a second direction;

[0039] With the cover plate in the closed position as a reference, the dimension of the first mounting groove in the second direction is greater than the outer diameter of the first extension; the dimension of the second mounting groove in the second direction is greater than the outer diameter of the second extension.

[0040] Optionally, the connecting rod includes a first sub-connecting rod and a second sub-connecting rod, wherein the first sub-connecting rod is movable relative to the second sub-connecting rod in the first direction and the first sub-connecting rod is rotatable relative to the second sub-connecting rod;

[0041] The first extension section is located on the first sub-connecting rod, the second extension section is located on the second sub-connecting rod, and the rubber roller is located on the second sub-connecting rod.

[0042] Optionally, the printer further includes a drive mechanism, which includes a motor and a transmission assembly, wherein the motor is capable of driving the transmission assembly to rotate;

[0043] The buckle assembly further includes a receiving groove, which is disposed adjacent to the second buckle groove, and the transmission assembly is disposed within the receiving groove;

[0044] The transmission assembly includes at least one first gear, and the second extension is provided with a second gear. When the cover plate is in the closed position, the second gear meshes with the first gear, and the motor can drive the first gear to rotate, so as to drive the rubber roller provided on the second sub-connecting rod to rotate around its own axis through the second gear.

[0045] Optionally, it also includes a detection sensor, which is fixed relative to the housing;

[0046] The detection sensor includes a touch-sensitive switch, the touch-sensitive switch having a pressure head, and the touch-sensitive switch being mounted on the mounting bracket;

[0047] With the cover plate in the closed position, the connecting rod pushes against the pressure head to trigger the touch-sensitive switch.

[0048] Optionally, the mounting bracket is provided with a first slot and a second slot, the first slot and the second slot being spaced apart in the first direction;

[0049] The pressure head is configured to extend to the first slot or the second slot;

[0050] With the cover plate in the closed position, both ends of the connecting rod are respectively embedded in the first slot and the second slot to push the pressure head.

[0051] Optionally, the pressure head is located at the bottom of the first slot or the bottom of the second slot, and when the connecting rod is inserted into the first slot and the second slot, the connecting rod can squeeze the pressure head.

[0052] Optionally, the detection sensor includes a photoelectric sensor, which has a sensing head, and the sensing head is disposed at a position corresponding to the rubber roller;

[0053] With the cover plate in the closed position, the rubber roller covers the sensor head.

[0054] Optionally, when the cover is in the closed position, the gap between the rubber roller and the sensor head allows printing paper to pass through.

[0055] One technical advantage of this application embodiment is that multiple functions can be achieved by reusing the connecting rod. It can be used to install the rubber roller, drive the rubber roller to rotate to guide the printing paper, and cooperate with the buckle assembly to lock the cover plate in the closed position. This reduces the number of parts in the printer, making the printer structure simple and compact, and facilitating weight reduction.

[0056] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0057] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0058] Figure 1 This is a schematic diagram of the printer structure in an embodiment of this application;

[0059] Figure 2 This is a schematic diagram of the structure of the latching assembly, driving mechanism, and print head in the embodiments of this application;

[0060] Figure 3This is a schematic diagram of the structure of the latching assembly, driving mechanism, and print head in the embodiments of this application;

[0061] Figure 4 This is a schematic diagram of the structure of the latching assembly, driving mechanism, and print head in the embodiments of this application;

[0062] Figure 5 This is a cross-sectional view of the snap-fit ​​assembly in an embodiment of this application;

[0063] Figure 6 This is a cross-sectional view of the snap-fit ​​assembly in an embodiment of this application;

[0064] Figure 7 This is a schematic diagram of the buckle assembly in the embodiments of this application;

[0065] Figure 8 This is a schematic diagram of the buckle assembly and drive mechanism in the embodiments of this application.

[0066] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Cavity; 2. Cover plate; 21. Mounting base; 21. Fourth mounting plate; 211. First mounting groove; 2111. Fifth mounting plate; 221. Second mounting groove; 2211. Snap-fit ​​assembly; 3. Mounting bracket; 31. First slot; 3111. First segment; 3112. Second slot; 3121. Sixth segment; 3122. Seventh segment; 3123. Eighth segment; 3123. Receiving groove; 313. First mounting bracket; 321. First mounting plate; 321. First end; 3211. Second end; 3212. First connecting part; 3213. Third slot; 3214. Third segment; 3215. Fourth... Section 3216; Fifth section 3217; Second mounting plate 322; Third end 3221; Fourth end 3222; Second connecting part 3223; Fourth slot 3224; Ninth section 3225; Tenth section 3226; Eleventh section 3227; Third mounting plate 323; Second mounting bracket 33; Unlocking component 34; Elastic component 35; Print head 4; Drive mechanism 5; Motor 51; Transmission assembly 52; First gear 521; Rubber roller 6; Second gear 73; First extension section 74; Second extension section 75; Touch sensor switch 8; Pressure head 81; First included angle a; Second included angle b; Third included angle c. Detailed Implementation

[0067] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0068] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0069] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0070] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0071] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0072] First, it should be noted that the first direction, second direction, and third direction mentioned in the embodiments of this application are referred to in the appendix. Figure 1 , Figure 2 , Figure 5 and Figure 6 The directions are marked in the diagram. Among them, the axis of the first direction, the axis of the second direction, and the axis of the third direction intersect each other.

[0073] like Figures 1-8 As shown, according to a first aspect of the embodiments of this application, a printer is provided, including a housing 1, a cover plate 2, a rubber roller 6, a snap-fit ​​assembly 3, and a print head 4; the housing 1 has a cavity 11 for placing printing paper; the cover plate 2 is rotatably connected to the housing 1, and the cover plate 2 is movable relative to the housing 1 to a paper open position and a closed position, and the cover plate 2 is provided with a mounting base 21; the connecting rod is provided with the rubber roller 6, and the connecting rod is rotatably disposed on the mounting base 21, the axis of the connecting rod being a first direction; the snap-fit ​​assembly 3 includes a mounting bracket 31 and a first mounting frame 32, the mounting bracket 31 being fixed Located inside the housing 1, the first mounting bracket 32 ​​is rotatably connected to the mounting support 31 and is configured to move to an initial position and an unlocked position; the print head 4 is mounted on the snap-fit ​​assembly 3; when the cover plate 2 is in the closed position, the first mounting bracket 32 ​​is configured to be in the initial position and engage with the connecting rod, and a paper feeding channel is formed between the rubber roller 6 and the print head 4. The paper feeding channel communicates with the cavity 11. The connecting rod rotates around its own axis, driving the rubber roller 6 to rotate so as to drive the printing paper in the cavity 11 to pass through the paper feeding channel to the outside of the cavity 11.

[0074] like Figure 1As shown, the printer includes a housing 1, a cover plate 2, a rubber roller 6, a latching assembly 3, and a print head 4. The housing 1 has a cavity 11 for holding printing paper. The cover plate 2 is rotatably connected to the housing 1, meaning it can rotate relative to the housing 1, allowing it to be in an open or closed position. In the closed position, the cover plate 2 covers the cavity 11; in the open position, it is not restricted by the latching assembly 3, thus exposing the cavity 11 for easy paper replacement. A mounting base 21 is located inside the cover plate 2. The rubber roller 6 is mounted on the mounting base 21 via a connecting rod, which can rotate relative to the mounting base 21. The latching assembly 3 is located inside the housing 1. Specifically, a mounting bracket 31 is installed inside the housing, and a first mounting frame 32 is rotatably connected to the mounting bracket 31, allowing the first mounting frame 32 to be in an initial or unlocked position.

[0075] When the cover plate 2 is in the closed position, the connecting rod engages with the first mounting bracket 32, and a paper feeding channel is formed between the rubber roller 6 and the print head 4. The paper feeding channel is connected to the cavity 11. The printing paper passes through the paper feeding channel from the cavity 11. The rubber roller 6 rotates around its own axis, which can drive the printing paper to move to the outside of the cavity 11. When the printing paper passes through the paper feeding channel, the print head 4 can print the corresponding information on the printing paper.

[0076] When the cover plate 2 needs to be in the open position, the first mounting bracket 32 ​​moves to the unlocked position, the connecting rod is released from the cooperation with the first mounting bracket 32, and the cover plate 2 is no longer restricted by the first mounting bracket 32, so the cover plate 2 can move freely to be in the open position.

[0077] The connecting rod in this application serves two purposes: it can be used to install the rubber roller 6, providing an installation position for the rubber roller 6; and when the cover plate 2 is in the closed position, the connecting rod cooperates with the snap-fit ​​assembly 3 to lock the cover plate 2 in the closed position. The rubber roller 6 mounted on the connecting rod can form a paper path with the print head 4. Therefore, the connecting rod of the printer in this application can achieve multiple functions, thereby reducing the number of parts in the printer, resulting in a simpler, more compact printer structure and facilitating weight reduction.

[0078] The "open position" means that after the connecting rod is detached from the first mounting bracket, the cover plate 2 can move freely, either fully exposing the cavity 11 or partially exposing the cavity 11.

[0079] The cover plate 2 and the mounting base 21 can be integrally formed; or the mounting base 21 can be detachably mounted on the cover plate 2.

[0080] In one optional embodiment, the housing 1 has a first mounting portion with a first through hole; the cover plate 2 has a second mounting portion with a second through hole, the first through hole and the second through hole being concentric; a pin is inserted into the first through hole and the second through hole, so that the cover plate 2 can rotate around the axis of the pin to be in the open position or the closed position. Specifically, the pin is detachably rotatably connected to the first through hole and the second through hole. When the printer needs to be inspected or maintained, the pin can be removed from the first through hole and the second through hole, thereby allowing the cover plate 2 to be removed from the housing 1 for maintenance and repair.

[0081] In an optional embodiment, the printer further includes a blocking member detachably disposed on the housing 1. The blocking member is used to prevent the pin from disengaging from the first through hole and the second through hole. By providing the blocking member to prevent the pin from disengaging from the first and second through holes, the installation stability between the cover plate 2 and the housing 1 is effectively improved, thereby preventing the cover plate 2 from separating from the housing 1 during transportation or in the event of a drop.

[0082] In an alternative embodiment, when the first mounting bracket 32 ​​has moved from the initial position to the unlocked position, the latching assembly 3 can be separated from the connecting rod so that the cover plate 2 can be removed from the closed position.

[0083] To further explain, the latching assembly 3 not only keeps the cover plate 2 in the closed position, but also enables unlocking. The first mounting bracket 32 ​​has an initial position and an unlocked position. In the initial position, the connecting rod engages with the first mounting bracket 32. When the cover plate 2 is in the closed position, the first mounting bracket 32 ​​is in the initial position, and the connecting rod engages with the latching assembly 3. When the first mounting bracket 32 ​​moves from the initial position to the unlocked position, the connecting rod can disengage from the first mounting bracket 32, thus separating the connecting rod from the first mounting bracket 32. Therefore, the cover plate 2 can change from the closed position to the open position, and the roller 6 and the print head 4 will separate.

[0084] The latching assembly 3 of this application can lock the cover plate 2 in the closed position by cooperating with the connecting rod, and can also release the connecting rod from the latching assembly 3 by moving the latching assembly 3 from the initial position to the unlocked position, so that the cover plate 2 is in the open position. Therefore, by integrating the unlocking and locking functions into the latching assembly 3, there is no need to set up a separate unlocking mechanism, which can make the printer structure more compact and reduce the size of the printer.

[0085] The latching assembly 3 is mounted on the housing 1. Other components can also be mounted on the latching assembly 3, such as the print head 4.

[0086] In one alternative embodiment, the connecting rod includes a first extension 74 and a second extension 75, with the first extension 74 and the second extension 75 located on opposite sides of the axial direction of the rubber roller 6 along the first direction.

[0087] The buckle assembly 3 further includes an unlocking component 34. The mounting bracket 31 is provided with a first slot 311 and a second slot 312. The first slot 311 and the second slot 312 are spaced apart in a first direction. The first mounting frame 32 is rotatably connected to the mounting bracket 31. The first mounting frame 32 is provided with a third slot 3214 and a fourth slot 3224. The third slot 3214 is adjacent to the first slot 311, and the fourth slot 3224 is adjacent to the second slot 312. The unlocking component 34 is rotatably connected to the mounting bracket 31 and abuts against the first mounting frame 32.

[0088] When the cover plate 2 is in the closed position, the first extension section 74 is engaged between the first slot 311 and the third slot 3214, and the second extension section 75 is engaged between the second slot 312 and the third slot 3214.

[0089] By rotating the unlocking member 34, the first mounting bracket 32 ​​can be driven to move from the initial position to the unlocked position, the first extension 74 can disengage from the first slot 311 and the third slot 3214, and the second extension 75 can disengage from the second slot 312 and the fourth slot 3224.

[0090] like Figure 1 As shown, the connecting rod includes a first extension section 74 and a second extension section 75. The first extension section 74 and the second extension section 75 are located on both sides of the axial direction of the rubber roller 6, and the axial direction of the rubber roller 6 is the same as the first direction.

[0091] like Figures 2-4 , Figure 7 and Figure 8As shown, the latch assembly 3 also includes an unlocking component 34; wherein, the mounting bracket 31 is provided with a first latch 311 and a second latch 312, the first latch 311 and the second latch 312 being spaced apart in a first direction; the first mounting frame 32 is rotatably connected to the mounting bracket 31, the first mounting frame 32 is provided with a third latch 3214 and a fourth latch 3224, the third latch 3214 and the fourth latch 3224 being spaced apart in a first direction, the third latch 3214 and the fourth latch 3224 being located between the first latch 311 and the second latch 312, the third latch 3214 being adjacent to the first latch 311, and the fourth latch 3224 being adjacent to the second latch 312; the unlocking component 34 is rotatably connected to the mounting bracket 31, the unlocking component 34 is rotatable around the axis in the first direction, and the unlocking component 34 is able to abut against the first mounting frame 32.

[0092] When the cover plate 2 is in the closed position, the first extension section 74 is engaged in the first slot 311 and the third slot 3214, and the second extension section 75 is engaged in the second slot 312 and the third slot 3214.

[0093] When the cover plate 2 needs to be opened, the unlocking member 34 can be rotated around the axis in the first direction by rotating the unlocking member 34. Since the unlocking member 34 abuts against the first mounting bracket 32, it can drive the first mounting bracket 32 ​​to rotate around the axis in the first direction, thereby moving it from the initial position to the unlocked position. The third slot 3214 also changes position relative to the first slot 311. The first extension 74 can disengage from the first slot 311 and the third slot 3214. The fourth slot 3224 changes position relative to the second slot 312. The second extension 75 can disengage from the second slot 312 and the fourth slot 3224, thereby allowing the cover plate 2 to move to the open position.

[0094] In one optional embodiment, the height direction of the printer is a third direction, and the direction perpendicular to the first direction and the third direction is a second direction; the first mounting bracket 32 ​​includes a first mounting plate 321, a second mounting plate 322, and a third mounting plate 323. The first mounting plate 321 includes a first end 3211, a second end 3212, and a first connecting portion 3213. The third slot 3214 is formed in the first mounting plate 321 and is located between the first connecting portion 3213 and the first end 3211. The first mounting plate 321 is located at the first connecting portion. The second mounting plate 322 is rotatably connected to the mounting bracket 31 at position 3213. The second mounting plate 322 includes a third end 3221, a fourth end 3222, and a second connecting part 3223. The fourth slot 3224 is formed in the second mounting plate 322 and is located between the second connecting part 3223 and the third end 3221. The second mounting plate 322 is rotatably connected to the mounting bracket 31 at the second connecting part 3223. One end of the third mounting plate 323 is connected to the second end 3212, and the other end of the third mounting plate 323 is connected to the fourth end 3222.

[0095] By rotating the unlocking member 34, the first mounting bracket 32 ​​can be driven to move from the initial position to the unlocked position, the third mounting plate 323 moves upward in the third direction, the first end 3211 moves downward in the third direction, the first extension 74 can disengage from the first slot 311 and the third slot 3214, the third end 3221 moves downward in the third direction, and the second extension 75 can disengage from the second slot 312 and the fourth slot 3224.

[0096] First, it should be noted that this means placing the printer on a flat tabletop with the printer facing away from the tabletop, and the printer's height direction being the third direction. Both the first and second directions are perpendicular to the third direction.

[0097] like Figures 2-4 As shown, the first mounting bracket 32 ​​includes a first mounting plate 321, a second mounting plate 322 and a third mounting plate 323. The first mounting plate 321 and the second mounting plate 322 are spaced apart in a first direction and are located between the first slot 311 and the second slot 312 in the first direction.

[0098] The first mounting plate 321 includes a first end 3211, a second end 3212, and a first connecting portion 3213. A third slot 3214 is provided on the first mounting plate 321. The third slot 3214 is located between the first end 3211 and the first connecting portion 3213. The first connecting portion 3213 is located between the first end 3211 and the second end 3212. The third slot 3214 is close to the first slot 311. The first mounting plate 321 is rotatably connected to the mounting bracket 31 at the first connecting portion 3213. The first mounting plate 321 is rotatable relative to the axis in the first direction.

[0099] The second mounting plate 322 includes a third end 3221, a fourth end 3222, and a second connecting portion 3223. A fourth slot 3224 is provided on the second mounting plate 322, which is located between the third end 3221 and the second connecting portion 3223. The second connecting portion 3223 is located between the third end 3221 and the fourth end 3222. The fourth slot 3224 is close to the second slot 312. The second mounting plate 322 is rotatably connected to the mounting bracket 31 at the second connecting portion 3223. The second mounting plate 322 is rotatable relative to the axis in the first direction.

[0100] One end of the third mounting plate 323 is connected to the second end 3212, and one end of the third mounting plate 323 is connected to the fourth end 3222. The unlocking member 34 is rotatably connected to the mounting bracket 31. The unlocking member 34 can rotate relative to the axis in the first direction, and the unlocking member 34 abuts against the third mounting plate 323.

[0101] When the cover plate 2 is in the closed position, the first extension section 74 is engaged in the first slot 311 and the third slot 3214, the second extension section 75 is engaged in the second slot 312 and the fourth slot 3224, and the rubber roller 6 is located between the first mounting plate 321 and the second mounting plate 322.

[0102] When the cover plate 2 needs to be opened, the first mounting bracket 32 ​​moves from the initial position to the unlocked position. Specifically, since the unlocking member 34 abuts against the third mounting plate 323, rotating the unlocking member 34 can drive the third mounting plate 323 to rotate around the axis in the first direction. The third mounting plate 323 moves upward in the third direction and forward in the second direction. Since the third mounting plate 323 connects the first mounting plate 321 and the second mounting plate 322, it can drive the second end 3212 of the first mounting plate 321 to move upward in the third direction and forward in the second direction, while the first end 3211 moves downward in the third direction and forward in the second direction. The third slot 3214 moves upward and downward in the third direction and forward in the second direction; the fourth end 3222 of the second mounting plate 322 moves upward in the third direction and forward in the second direction, and the third end 3221 moves upward and downward in the third direction and forward in the second direction, so the fourth slot 3224 moves upward and downward in the third direction and forward in the second direction; thereby releasing the engagement relationship between the first extension section 74 and the first slot 311 and the third slot 3214, and the engagement relationship between the second extension section 75 and the second slot 312 and the fourth slot 3224, thereby changing the cover plate 2 from the closed position to the open position.

[0103] In an optional embodiment, the first slot 311 includes a first sidewall, which includes a first segment 3111 and a second segment 3112. The plane of the first segment 3111 is parallel to the plane containing the third direction, and the second segment 3112 is an arc surface. The third slot 3214 includes a second sidewall, which includes a third segment 3215, a fourth segment 3216, and a fifth segment 3217 connected in sequence. The plane of the third segment 3215 intersects the plane containing the third direction, the fourth segment 3216 is an arc surface, and the fifth segment 3217 is tangent to the fourth segment 3216. The second segment 3112 is disposed opposite to the fourth segment 3216. When the cover plate 2 is in the closed position, the first extension segment 74 is located between the second segment 3112, the fourth segment 3216, and the fifth segment 3217.

[0104] The second slot 312 includes a third sidewall, which includes a sixth segment 3121, a seventh segment 3122, and an eighth segment 3123 connected in sequence. The plane of the sixth segment 3121 intersects the plane containing the third direction, the plane of the seventh segment 3122 is parallel to the plane containing the third direction, and the eighth segment 3123 is an arc surface. The fourth slot 3224 includes a ninth segment 3225, a tenth segment 3226, and an eleventh segment 3227 connected in sequence. The plane of the ninth segment 3225 intersects the plane containing the third direction, the tenth segment 3226 is an arc surface, and the eleventh segment 3227 is tangent to the tenth segment 3226. When the cover plate 2 is in the closed position, the second extension segment 75 is located between the eighth segment 3123, the tenth segment 3226, and the eleventh segment 3227.

[0105] like Figure 5 As shown, the first slot 311 includes a first sidewall, and the third slot 3214 includes a second sidewall. The first sidewall and the second sidewall are disposed opposite to each other in the second direction.

[0106] The first sidewall comprises a first segment 3111 and a second segment 3112 connected together. The plane of the first segment 3111 facing the interior of the first slot 311 is parallel to the plane containing the third direction. The second segment 3112 is an arc surface, facing the interior of the first slot 311. The first segment 3111 and the second segment 3112 are not tangent. The second sidewall comprises a third segment 3215, a fourth segment 3216, and a fifth segment 3217 connected in sequence. The plane of the third segment 3215 facing the third slot 3214 intersects the plane containing the third direction, with the included angle being the first included angle α. Please refer to the appendix. Figure 5The first included angle α is an acute angle; the fourth segment 3216 is an arc surface, facing the interior of the third slot 3214, and the fourth segment 3216 is not tangent to the third segment 3215; the fifth segment 3217 is a plane, and the fifth segment 3217 is tangent to the fourth segment 3216; the first segment 3111 and the third segment 3215 are arranged opposite each other in the second direction, and the second segment 3112 and the fourth segment 3216 are arranged opposite each other in the second direction; in the closed position of the cover plate 2, the first extension segment 74 is located between the second segment 3112, the fourth segment 3216 and the fifth segment 3217, and the fourth segment 3216 and the fifth segment 3217 are arranged opposite each other in the second direction. All segments 3217 are arc surfaces. The fourth segment 3216 and the fifth segment 3217 can restrict the movement of the first extension segment 74. When the cover plate 2 moves from the open position to the closed position, the first extension segment 74 first passes through the first segment 3111 and the third segment 3215. Since the third segment 3215 is an inclined surface, the distance between the third segment 3215 and the first segment 3111 gradually decreases from the end away from the second segment 3112 and the fourth segment 3216 to the end closer to the second segment 3112 and the fourth segment 3216, so that the first extension segment 74 can be easily inserted into the first slot 311 and the third slot 3214.

[0107] like Figure 6 As shown, the second slot 312 includes a third sidewall, and the third slot 3214 includes a fourth sidewall. The third sidewall and the fourth sidewall are disposed opposite to each other in the second direction.

[0108] The third sidewall comprises a sixth segment 3121, a seventh segment 3122, and an eighth segment 3123 connected in sequence. The plane of the sixth segment 3121 facing the interior of the second slot 312 intersects the plane containing the third direction, with the included angle being the second included angle b. Please refer to the appendix. Figure 6 The second included angle b is an acute angle; the plane of the seventh segment 3122 facing the interior of the second slot 312 is parallel to the plane containing the third direction; the eighth segment 3123 is an arc surface, facing the interior of the second slot 312, and is not tangent to the seventh segment 3122; the fourth sidewall includes the ninth segment 3225, the tenth segment 3226, and the eleventh segment 3227 connected in sequence; the plane of the ninth segment 3225 facing the fourth slot 3224 intersects the plane containing the third direction, and the included angle is the third included angle c. Please refer to the appendix. Figure 7The third included angle c is an acute angle; the tenth segment 3226 is an arc surface, facing the interior of the fourth slot 3224; the ninth segment 3225 is not tangent to the tenth segment 3226; the eleventh segment 3227 is a plane, tangent to the ninth segment 3225; the sixth segment 3121 and the seventh segment 3122 are arranged opposite to the ninth segment 3225 in the second direction; the eighth segment 3123 is arranged opposite to the tenth segment 3226 in the second direction; when the cover plate 2 is in the closed position, the second extension segment 75 is located between the eighth segment 3123, the tenth segment 3226 and the eleventh segment 3227, and the eighth segment 3123 and the tenth segment 3224 are arranged opposite to each other in the second direction. All segments 3226 are arc surfaces. The eighth segment 3123 and the tenth segment 3226 can restrict the movement of the second extension segment 75. When the cover plate 2 moves from the open position to the closed position, the second extension segment 75 first passes through the sixth segment 3121 and the ninth segment 3225. Since the sixth segment 3121 and the ninth segment 3225 are inclined surfaces, the distance between the sixth segment 3121 and the ninth segment 3225 gradually decreases from the end away from the eighth segment 3123 and the tenth segment 3226 to the end closer to the eighth segment 3123 and the tenth segment 3226, so that the second extension segment 75 can be easily inserted into the second slot 312 and the fourth slot 3224.

[0109] In one alternative embodiment, when the first mounting bracket 32 ​​is in the initial position, the second sidewall protrudes into the first slot 311 in the second direction, and the fourth sidewall protrudes into the second slot 312 in the second direction; when the first mounting bracket 32 ​​is in the unlocked position, the second sidewall does not coincide with the first slot 311, and the fourth sidewall does not coincide with the second slot 312.

[0110] When the first mounting bracket 32 ​​is in the unlocked position, the second sidewall protrudes into the first slot 311 in the second direction. That is, in the first direction, the projection of the second sidewall is located inside the first slot 311, and the second sidewall and the first sidewall can lock the first extension 74. The fourth sidewall protrudes into the second slot 312 in the second direction. That is, in the first direction, the projection of the fourth sidewall is located inside the second slot 312, and the fourth sidewall and the third sidewall can lock the second extension 75.

[0111] In the unlocked position, the second sidewall does not coincide with the first card slot 311, that is, the projection of the second sidewall in the first direction is not located inside the first card slot 311; the fourth sidewall does not coincide with the second card slot 312, that is, the projection of the fourth sidewall in the first direction is not inside the second card slot 312.

[0112] To further explain, when it is necessary to open the cover plate 2, the first mounting bracket 32 ​​moves from the initial position to the unlocked position. Specifically, by rotating the unlocking member 34, the third slot 3214 can move upward and downward in the third direction and forward in the second direction, so as to increase the distance between the first side wall and the second side wall, thereby facilitating the first extension 74 to disengage from the first slot 311 and the third slot 3214.

[0113] The fourth slot 3224 can move upward and downward in the third direction and forward in the second direction, thus increasing the distance between the third sidewall and the fourth sidewall, thereby facilitating the second extension 75 to disengage from the first slot 311 and the third slot 3214.

[0114] In an optional embodiment, the snap-fit ​​assembly 3 further includes a second mounting bracket 33 and an elastic element 35, wherein the second mounting bracket 33 and the third mounting plate 323 are spaced apart in a second direction, and the elastic element 35 is disposed between the third mounting plate 323 and the second mounting bracket 33.

[0115] By pressing the unlocking member 34 to drive the first mounting bracket 32 ​​to move from the initial position to the unlocked position, the first mounting bracket 32 ​​presses the elastic member 35 in the second direction;

[0116] By releasing the unlocking member 34, the elastic member 35 causes the first mounting bracket 32 ​​to return from the unlocked position to the initial position.

[0117] like Figure 3 and Figure 4 As shown, the latching assembly 3 also includes a second mounting bracket 33 and an elastic member 35; the second mounting bracket 33 and the third mounting plate 323 are spaced apart in the second direction, the second mounting bracket 33 is located on the side of the third mounting plate 323 away from the unlocking member 34, one end of the elastic member 35 is connected to the second mounting bracket 33, and the other end of the elastic member 35 is connected to the third mounting plate 323.

[0118] Pressing the unlocking member 34 can drive the first mounting bracket 32 ​​to move from the initial position to the unlocked position. Since the unlocking member 34 rotates around the axis of the first direction, and the first mounting bracket 32 ​​also rotates around the axis of the first direction, the third mounting plate 323 can move upward and downward in the third direction, and can compress the elastic member 35 in the second direction. When the unlocking member 34 is released, the elastic force of the elastic member 35 can cause the third mounting plate 323 to move away from the second mounting bracket 33 in the second direction. The third mounting plate 323 moves upward and downward in the third direction, so that the first mounting bracket 32 ​​is reset from the unlocked position to the initial position.

[0119] The elastic element 35 can be a spring or a sheet. One, two, three, or four elastic elements 35 can be provided.

[0120] In an optional embodiment, the printer further includes a switch assembly disposed on the housing 1. The switch assembly abuts against the unlocking member 34, and the unlocking member 34 can be pressed by the switch assembly. By driving the unlocking member 34 to rotate, the first mounting bracket 32 ​​is driven to move from an initial position to an initial position, thereby unlocking the device. The switch assembly is disposed on the housing 1 to facilitate user access to press the unlocking member 34.

[0121] In one alternative embodiment, the second mounting bracket 33 is disposed between the first mounting plate 321 and the second mounting plate 322, the second mounting bracket 33 is rotatably connected to the mounting bracket 31, and the print head 4 is disposed on the side of the second mounting bracket 33 away from the first mounting bracket 32.

[0122] like Figure 4 As shown, the second mounting bracket 33 is rotatably connected to the mounting bracket 31, and the second mounting bracket 33 can rotate relative to the mounting bracket 31 about the axis in the first direction.

[0123] With the cover plate 2 in the closed position, a paper feeding channel can be formed between the print head 4 and the rubber roller 6. The rubber roller 6 may squeeze the print head 4 in the second direction, thereby causing the second mounting bracket 33 to squeeze the elastic member 35 in the second direction to prevent the print head 4 from being squeezed and deformed. In addition, the elastic member 35 will also give the print head 4 an elastic force towards the rubber roller 6, so that the print head 4 and the rubber roller 6 can fit together. The printing paper passes through the paper feeding channel between the print head 4 and the rubber roller 6, and the printing paper can make good contact with the print head 4, so that the print head 4 can print on the printing paper, thereby improving the printing quality.

[0124] Therefore, the elastic element 35 can not only reset the first mounting bracket 32 ​​from the unlocked position to the initial position, but also provide a buffer for the print head 4; in addition, the elastic element 35 will also give the print head 4 an elastic force toward the rubber roller 6, so that the print head 4 and the rubber roller 6 can adhere to each other, and the rubber roller 6 can press the printing paper to adhere to the print head 4, so that the printing paper can have good contact with the print head 4, thereby improving the printing quality.

[0125] In one optional embodiment, the mounting base 21 is provided with a first mounting groove 2111 and a second mounting groove 2211, the first mounting groove 2111 and the second mounting groove 2211 being spaced apart in the first direction; a portion of the first extension 74 is engaged in the first mounting groove 2111, a portion of the second extension 75 is engaged in the second mounting groove 2211, the outer diameter of the first extension 74 is smaller than the inner diameter of the first mounting groove 2111, and the outer diameter of the second extension 75 is smaller than the inner diameter of the first mounting groove 2111;

[0126] The connecting rod is configured to sway relative to the mounting base 21 in a direction perpendicular to the first direction.

[0127] like Figure 1 As shown, the mounting base 21 is provided with a first mounting groove 2111 and a second mounting groove 2211; wherein, the mounting base 21 includes a fourth mounting plate 211 and a fifth mounting plate 221, the fourth mounting plate 211 and the fifth mounting plate 221 are spaced apart in a first direction, the thickness direction of the fourth mounting plate 211 is the first direction, the thickness direction of the fifth mounting plate 221 is the first direction, the first mounting groove 2111 is formed on the fourth mounting plate 211 and penetrates the fourth mounting plate 211 in the first direction, the second mounting groove 2211 is formed on the fifth mounting plate 221 and penetrates the fifth mounting plate 221 in the first direction; a portion of the first extension 74 is engaged in the first mounting groove 2111, and the second extension 75... Part of the cover plate 2 is engaged in the second mounting groove 2211, and the rubber roller 6 is located between the fourth mounting plate 211 and the fifth mounting plate 221. The connecting rod is cylindrical, and the length of the first extension 74 in the first direction is greater than the thickness of the fourth mounting plate 211, and the length of the second extension 75 in the first direction is greater than the thickness of the fifth mounting plate 221. Therefore, only part of the first extension 74 is located in the first mounting groove 2111, and only part of the second extension 75 is located in the second mounting groove 2211. So when the cover plate 2 is in the closed position, the first extension 74 can be engaged in the first slot 311 and the third slot 3214, and the second extension 75 can be engaged in the second slot 312 and the fourth slot 3224.

[0128] To further explain, the outer diameter of the first extension 74 is smaller than the inner diameter of the first mounting groove 2111, allowing the first extension 74 to wobble relative to the first mounting groove 2111. In other words, the first extension 74 can rotate about its own axis relative to the first mounting groove 2111 and can wobble radially within the first mounting groove 2111. Similarly, the outer diameter of the second extension 75 is smaller than the inner diameter of the second mounting groove 2211, allowing the second extension 75 to wobble relative to the second mounting groove 2211. In other words, the second extension 75 can rotate about its own axis relative to the second mounting groove 2211. The first extension 74 can automatically adjust itself when it engages with the first slot 311 and the third slot 3214, and the second extension 75 can automatically adjust itself when it engages with the second slot 312 and the fourth slot 3224. Furthermore, a second gear 73 is provided on the second extension 75, and the drive mechanism 5 includes a first gear 521. The automatic adjustment of the second extension 75 also facilitates the meshing of the first gear 521 and the second gear 73.

[0129] In one optional embodiment, the height direction of the printer is a third direction, and the direction perpendicular to the first direction and the third direction is a second direction. Taking the cover plate 2 in the closed position as a reference, the dimension of the first mounting groove 2111 in the second direction is greater than the outer diameter of the first extension 74; the dimension of the second mounting groove 2211 in the second direction is greater than the outer diameter of the second extension 75. Specifically, when the cover plate 2 moves from the open position to the closed position, the first extension 74 engages with the first slot 311 and the third slot 3214, and the first extension 74 can automatically adjust along the second direction within the first mounting groove so that the first extension 74 can be accurately engaged within the first slot 311 and the third slot 3214. When the second extension 75 engages with the second slot 312 and the fourth slot 3224, the second extension 75 can automatically adjust along the second direction within the second mounting groove so that the second extension 75 can be accurately engaged within the second slot 312 and the fourth slot 3224.

[0130] In one optional embodiment, the connecting rod includes a first sub-connecting rod and a second sub-connecting rod. The first sub-connecting rod is movable relative to the second sub-connecting rod in the first direction, and the first sub-connecting rod is rotatable relative to the second sub-connecting rod. The first sub-connecting rod wobbles relative to the second sub-connecting rod in the first direction so that the first sub-connecting rod can automatically adjust in the first direction so that the first sub-connecting rod is accurately engaged in the first slot 311 and the third slot 3214, and the second sub-connecting rod is accurately engaged in the second slot 312 and the fourth slot 3224. The first extension section 74 is located on the first sub-connecting rod, the second extension section 75 is located on the second sub-connecting rod, the rubber roller 6 is disposed on the second sub-connecting rod, and the second gear 73 is disposed on the second extension section 75, that is, on the second sub-connecting rod. When the cover plate 2 is closed, the second sub-connecting rod is driven to rotate around its own axis, thereby driving the rubber roller 6 to rotate, while the first sub-connecting rod does not need to rotate. This reduces the friction between the connecting rod and the slot, improves the stability of the rubber roller 6 during rotation, and makes the rotation of the rubber roller 6 smoother.

[0131] In a preferred embodiment, a first limiting part is provided on the first sub-connecting rod, and a second limiting part is provided on the second sub-connecting rod. Both the first limiting part and the second limiting part are located between the fourth mounting plate 211 and the fifth mounting plate 221. The first limiting part will not pass through the first mounting groove 2111, and the second limiting part will not pass through the second mounting groove 2211, thereby restricting the connecting rod from disengaging from the mounting base 21 in the first direction.

[0132] In one alternative embodiment, the printer further includes a drive mechanism 5, which includes a motor 51 and a transmission assembly 52, wherein the motor 51 is capable of driving the transmission assembly 52 to rotate.

[0133] The buckle assembly 3 further includes a receiving groove 313, which is disposed adjacent to the second buckle groove 312, and the transmission assembly 52 is disposed in the receiving groove 313;

[0134] The transmission assembly 52 includes at least one first gear 521, and the second extension 75 is provided with a second gear 73. When the cover plate 2 is in the closed position, the second gear 73 meshes with the first gear 521. The motor 51 can drive the first gear 521 to rotate, so as to drive the rubber roller 6 provided on the second sub-connecting rod to rotate around its own axis through the second gear 73.

[0135] like Figure 2 and Figure 8 As shown, the printer also includes a drive mechanism 5, which includes a motor 51 and a transmission assembly 52, the transmission assembly 52 being disposed within the receiving groove 313.

[0136] To further explain, the transmission assembly 52 includes at least one first gear 521. This can be understood as the transmission assembly 52 including one first gear 521, two first gears 521, three first gears 521, or more first gears 521. If there are two first gears 521, one of the first gears 521 is connected to the output shaft of the motor 51, and the other first gear 521 meshes with the first gear 521. If there are three first gears 521, one of the first gears 521 is connected to the output shaft of the motor 51, and the three first gears 521 are meshed and connected in sequence.

[0137] To further explain, a second gear 73 is provided on the second extension section 75, that is, the second gear 73 is located at the end of the second sub-connecting rod; when the cover plate 2 is in the closed position, the second gear 73 meshes with the first gear 521, and the motor 51 can drive the second gear 73 to rotate through the transmission component 52, thereby driving the rubber roller 6 to rotate around its own axis through the second sub-connecting rod, thereby realizing the feeding of printing paper.

[0138] In one optional embodiment, the housing 1 has a first mounting portion with a first through hole; the cover plate 2 has a second mounting portion with a second through hole, the first through hole and the second through hole being concentric; a pin is inserted into the first through hole and the second through hole, so that the cover plate 2 can rotate around the axis of the pin to be in the open position or the closed position. Specifically, the pin is detachably rotatably connected to the first through hole and the second through hole. When the printer needs to be inspected or maintained, the pin can be removed from the first through hole and the second through hole, thereby allowing the cover plate 2 to be removed from the housing 1 for maintenance and repair.

[0139] In an optional embodiment, the printer further includes a blocking member detachably disposed on the housing 1. The blocking member is used to prevent the pin from disengaging from the first through hole and the second through hole. By providing the blocking member to prevent the pin from disengaging from the first and second through holes, the installation stability between the cover plate 2 and the housing 1 is effectively improved, thereby preventing the cover plate 2 from separating from the housing 1 during transportation or in the event of a drop.

[0140] In one alternative implementation, such as Figure 7As shown, it also includes a detection sensor, which is fixed relative to the housing 1. The detection sensor includes a touch-sensitive switch 8, which has a pressure head 81 and is mounted on the mounting bracket 31. When the cover 2 is in the closed position, the connecting rod pushes the pressure head 81 to trigger the touch-sensitive switch 8. The touch-sensitive switch 8 is used to detect whether the cover is in the closed or open position. When the pressure head 81 of the touch-sensitive switch 8 is pressed down, it detects that the cover 2 is in the closed state. If the cover 2 is detected to be in the open state, some functions of the printer cannot be used. If the cover 2 is in the open position and the printer is in operation, some internal components of the printer may cause injury to the user.

[0141] In one optional embodiment, the mounting bracket 31 is provided with a first slot 311 and a second slot 312, the first slot 311 and the second slot 312 being spaced apart in the first direction; the pressure head 81 is configured to extend to the first slot 311 or the second slot 312; when the cover plate 2 is in the closed position, both ends of the connecting rod are respectively embedded in the first slot 311 and the second slot 312 to push the pressure head 81; in this embodiment, when the cover plate 2 is in the closed position, the connecting rod 37 can ensure that it can push the pressure head 81, avoiding the problem of poor contact.

[0142] In a preferred embodiment, the pressure head 81 is located at the bottom of the first slot 311 or the bottom of the second slot 312. When the connecting rod 37 is engaged in the first slot 311 and the second slot 312, the connecting rod 37 can compress the pressure head 81. Specifically, by positioning the pressure head 81 at the bottom of the first slot 311 or the second slot 312, the connecting rod 37, when confined within the first slot 311 and the second slot 312, can simultaneously press and trigger the touch-sensitive switch 8. This improves both the rationality of the connection and the reliability of the touch-sensitive switch 8. Furthermore, the first slot 311 or the second slot 312 can also provide some protection for the pressure head 81, preventing accidental activation and further improving the reliability of the detection results.

[0143] In one optional embodiment, the detection sensor includes a photoelectric sensor with a sensing head positioned corresponding to the rubber roller 6. When the cover plate 2 is in the closed position, the rubber roller 6 covers the sensing head. The photoelectric sensor detects whether the cover plate 2 is in the closed or open position. When the cover plate 2 is in the open position, some functions of the printer are unusable. If the cover plate 2 is in the open position and the printer is working normally, some internal components of the printer may cause injury to the user.

[0144] Both the photoelectric sensor and the touch sensor switch 8 detect whether the cover 2 is in the open or closed position. The printer can only be used normally when both the photoelectric sensor and the touch sensor switch 8 detect that the cover 2 is in the closed position.

[0145] When the cover plate is in the closed position, the gap between the rubber roller and the sensor head allows the printing paper to pass through.

[0146] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A printer characterized by comprising: The printer comprises: a shell provided with a cavity for placing printing paper; a cover plate rotatably connected with the shell, the cover plate being movable relative to the shell to an open position and a closed position, the cover plate being provided with a mounting seat; a connecting rod provided with a rubber roller, the connecting rod being rotatably arranged in the mounting seat, the axial direction of the connecting rod being a first direction; a buckle assembly comprising a mounting bracket and a first mounting frame, the mounting bracket being fixedly arranged in the shell, the first mounting frame being rotatably connected with the mounting bracket and being configured to be movable to an initial position and an unlocked position; a print head arranged on the buckle assembly; in a state where the cover plate is in the closed position, the first mounting frame is configured to be in the initial position and to be in engagement with the connecting rod, a paper feeding channel being formed between the rubber roller and the print head, the paper feeding channel being in communication with the cavity, the rubber roller being driven to rotate by rotating the connecting rod about its own axis to drive the printing paper in the cavity to pass out of the paper feeding channel to the outside of the cavity.

2. The printer of claim 1, wherein, The shell is provided with a first mounting portion, the first mounting portion being provided with a first through hole; the cover plate is provided with a second mounting portion, the second mounting portion being provided with a second through hole, the first through hole and the second through hole being concentric; a pin shaft is inserted into the first through hole and the second through hole to enable the cover plate to rotate about the axis of the pin shaft to be located in the open position or the closed position.

3. The printer of claim 2, wherein, The printer further comprises a blocking piece, the blocking piece being detachably arranged in the shell, the blocking piece being used to prevent the pin shaft from being disengaged from the first through hole and the second through hole.

4. The printer of claim 1, wherein, in a state where the first mounting frame moves from the initial position to the unlocked position, the buckle assembly and the connecting rod can be separated to enable the cover plate to be moved away from the closed position.

5. The printer of claim 4, wherein, The connecting rod comprises a first extension section and a second extension section, the first extension section and the second extension section being respectively located on two sides of the rubber roller along the first direction; the buckle assembly further comprises an unlocking piece, the mounting bracket being provided with a first clamping groove and a second clamping groove, the first clamping groove and the second clamping groove being arranged in the first direction, the first mounting frame being provided with a third clamping groove and a fourth clamping groove, the third clamping groove being arranged adjacent to the first clamping groove, the fourth clamping groove being arranged adjacent to the second clamping groove, the unlocking piece being rotatably connected with the mounting bracket and being in abutment with the first mounting frame; in a state where the cover plate is in the closed position, the first extension section is clamped between the first clamping groove and the third clamping groove, and the second extension section is clamped between the second clamping groove and the third clamping groove; by rotating the unlocking piece, the first mounting frame can be driven to move from the initial position to the unlocked position, the first extension section can be disengaged from the first clamping groove and the third clamping groove, and the second extension section can be disengaged from the second clamping groove and the fourth clamping groove.

6. The printer according to claim 5, wherein A height direction of the printer is a third direction, and a direction perpendicular to the first direction and the third direction is a second direction; The first mounting frame comprises a first mounting plate, a second mounting plate and a third mounting plate, the first mounting plate comprises a first end, a second end and a first connecting portion, the third slot is formed in the first mounting plate and located between the first connecting portion and the first end, the first mounting plate is rotationally connected with the mounting support at the first connecting portion, the second mounting plate comprises a third end, a fourth end and a second connecting portion, the fourth slot is formed in the second mounting plate and located between the second connecting portion and the third end, the second mounting plate is rotationally connected with the mounting support at the second connecting portion, one end of the third mounting plate is connected with the second end, and the other end of the third mounting plate is connected with the fourth end; By rotating the unlocking piece, the first mounting frame can be driven to move from the initial position to the unlocking position, the third mounting plate moves upward in the third direction, the first end moves downward in the third direction, the first extension segment can be separated from the first slot and the third slot, the third end moves downward in the third direction, and the second extension segment can be separated from the second slot and the fourth slot.

7. The printer according to claim 6, wherein The first slot comprises a first side wall, the first side wall comprises a first segment and a second segment, the plane of the first segment is parallel to the plane where the third direction is located, and the second segment is a circular arc surface. The third slot comprises a second side wall, the second side wall comprises a third segment, a fourth segment and a fifth segment connected in sequence, the plane of the third segment intersects the plane where the third direction is located, the fourth segment is a circular arc surface, the fifth segment is tangent to the fourth segment, the second segment is arranged opposite to the fourth segment, and in the state that the cover plate is in the closed position, the first extension segment is located between the second segment, the fourth segment and the fifth segment. The second slot comprises a third side wall, the third side wall comprises a sixth segment, a seventh segment and an eighth segment connected in sequence, the plane of the sixth segment intersects the plane where the third direction is located, the plane of the seventh segment is parallel to the plane where the third direction is located, and the eighth segment is a circular arc surface. The fourth slot comprises a ninth segment, a tenth segment and an eleventh segment connected in sequence, the plane of the ninth segment intersects the plane where the third direction is located, the tenth segment is a circular arc surface, and the eleventh segment is tangent to the tenth segment. In the state that the cover plate is in the closed position, the second extension segment is located between the eighth segment, the tenth segment and the eleventh segment.

8. The printer of claim 7, wherein, In the case that the first mounting frame is in the initial position, the second side wall protrudes to the first slot in the second direction, and the fourth side wall protrudes to the second slot in the second direction; In the case that the first mounting frame is in the unlocking position, the second side wall does not coincide with the first slot, and the fourth side wall does not coincide with the second slot.

9. The printer of claim 6, wherein, The buckle assembly further comprises a second mounting frame and an elastic member, the second mounting frame is arranged in the second direction away from the third mounting plate, and the elastic member is arranged between the third mounting plate and the second mounting frame; By pressing the unlocking member to drive the first mounting frame to move from the initial position to the unlocking position, the first mounting frame extrudes the elastic member in the second direction; By releasing the unlocking member, the elastic member resets the first mounting frame from the unlocking position to the initial position.

10. The printer of claim 9, wherein, The printer further comprises a switch assembly arranged in the shell, the switch assembly abuts against the unlocking member, and the unlocking member can be pressed through the switch assembly.

11. The printer of claim 9, wherein, The second mounting frame is arranged between the first mounting plate and the second mounting plate, the second mounting frame is rotationally connected with the mounting bracket, and the print head is arranged on the side of the second mounting frame away from the first mounting frame.

12. The printer of claim 5, wherein, The mounting seat is provided with a first mounting groove and a second mounting groove, the first mounting groove and the second mounting groove are arranged in the first direction; Part of the first extension section is clamped in the first mounting groove, part of the second extension section is clamped in the second mounting groove, the outer diameter of the first extension section is smaller than the inner diameter of the first mounting groove, and the outer diameter of the second extension section is smaller than the inner diameter of the first mounting groove; The connecting rod is configured to be able to sway relative to the mounting seat in a direction perpendicular to the first direction.

13. The printer of claim 12, wherein, The height direction of the printer is a third direction, and the direction perpendicular to the first direction and the third direction is a second direction; In the posture that the cover plate is in the closed position, the size of the first mounting groove in the second direction is greater than the outer diameter of the first extension section, and the size of the second mounting groove in the second direction is greater than the outer diameter of the second extension section.

14. The printer of claim 11, wherein, The connecting rod comprises a first sub-connecting rod and a second sub-connecting rod, the first sub-connecting rod is movable relative to the second sub-connecting rod in the first direction, and the first sub-connecting rod is rotatable relative to the second sub-connecting rod; The first extension section is located in the first sub-connecting rod, the second extension section is located in the second sub-connecting rod, and the rubber roller is arranged on the second sub-connecting rod.

15. The printer of claim 14, wherein, The printer further comprises a driving mechanism, the driving mechanism comprises a motor and a transmission assembly, and the motor can drive the transmission assembly to rotate; The buckle assembly further comprises a containing groove, the containing groove is arranged adjacent to the second clamping groove, and the transmission assembly is arranged in the containing groove; The transmission assembly comprises at least one first gear, the second extension section is provided with a second gear, in the state that the cover plate is in the closed position, the second gear is engaged with the first gear, and the motor can drive the first gear to rotate to drive the rubber roller arranged on the second sub-connecting rod to rotate around its axis through the second gear.

16. The printer of claim 1, wherein, Further comprising a detection sensor, the detection sensor is fixed relative to the shell; The detection sensor comprises a touch sensor switch having a pressure head, and the touch sensor switch is arranged on the mounting bracket; In the state that the cover plate is in the closed position, the connecting rod pushes the pressure head to trigger the touch sensor switch.

17. The printer of claim 16, wherein, The mounting bracket is provided with a first clamping groove and a second clamping groove, and the first clamping groove and the second clamping groove are arranged in the first direction; The pressure head is configured to extend to the first clamping groove or the second clamping groove; In the state that the cover plate is in the closed position, the two ends of the connecting rod are respectively embedded in the first clamping groove and the second clamping groove to push the pressure head.

18. The printer of claim 17, wherein, The pressure head is located at the bottom of the first clamping groove or the bottom of the second clamping groove, and when the connecting rod is clamped in the first clamping groove and the second clamping groove, the connecting rod can press the pressure head.

19. The printer of claim 16, wherein, The detection sensor comprises a photoelectric sensor having a sensing light head, and the sensing light head is arranged at a position corresponding to the rubber roller; In the state that the cover plate is in the closed position, the rubber roller covers the sensing light head.

20. The printer of claim 19, wherein, In the state that the cover plate is in the closed position, the gap between the rubber roller and the sensing light head is used for the printing paper to pass through.

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