Printer

Abstract

The utility model discloses a printer which comprises a main machine, a cover body, a pressing roller and a driving mechanism, the pressing roller is arranged on the cover body and provided with a first transmission gear, the driving mechanism comprises a second transmission gear, a first projection is formed on a first plane through the first transmission gear, and a second projection is formed on the first plane through the second transmission gear. The connecting line of the center of the first projection and the center of the second projection is the first connecting line, the first connecting line extends in an inclined mode, and the first plane is perpendicular to the axis of the pressing roller, so that when the cover body covers the pressing roller, the first transmission gear and the second transmission gear are difficult to collide with each other in a centering mode, and the situation that the first transmission gear and the second transmission gear abut against each other tightly is difficult to occur. When the first transmission gear and the second transmission gear collide with each other, at least one of the first transmission gear and the second transmission gear rotates under the action of tangential component force, so that the first transmission gear and the second transmission gear are meshed more easily, the cover is more easily closed, and the cover body is not prone to deformation and collapse.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printing technology, and in particular to a printer. BACKGROUND

[0002] The printer comprises a main body and a cover, the cover is provided with a pressure roller, also known as a printing roller, for rolling and pressing a printing object to improve printing effect, the main body is provided with a transmission assembly, one end of the pressure roller is provided with a first transmission gear, the transmission assembly comprises a second transmission gear, when the cover is closed, the second transmission gear can engage with the first transmission gear to drive rotation of the first transmission gear.

[0003] In the related art, when the cover is closed, the first transmission gear and the second transmission gear will interfere with each other, and the cover will be difficult to close and will be deformed. CONTENT OF THE INVENTION

[0004] The present application provides a printer which can solve the technical problem that the cover is difficult to close and is deformed.

[0005] In a first aspect, the present application provides a printer comprising:

[0006] a main body;

[0007] a cover rotationally connected to the main body to have a closed state and an unfolded state;

[0008] a pressure roller provided on the cover, the pressure roller being provided with a first transmission gear; and

[0009] a driving mechanism provided on the main body, the driving mechanism comprising a second transmission gear, when the cover is in the closed state, the first transmission gear engages with the second transmission gear;

[0010] wherein the first transmission gear has a first projection in a first plane, the second transmission gear has a second projection in the first plane, a line connecting the center of the first projection and the center of the second projection is a first line, the first line extends obliquely, and the first plane is perpendicular to the axis of the pressure roller.

[0011] In some embodiments, an included angle between the extension direction of the first line and the vertical direction is α, and α satisfies: 5°≤α≤45°.

[0012] In some embodiments, the tooth width of the first transmission gear is smaller than the tooth width of the second transmission gear.

[0013] In some embodiments, the pressing roller is located in the cover, and the pressing roller is capable of sliding relative to the cover along the axial direction of the pressing roller, so that the pressing roller has a sliding area, and the first transmission gear is located between the two sides of the second transmission gear along the axial direction of the second transmission gear when the pressing roller is located in the sliding area.

[0014] In some embodiments, the host is provided with a clamping assembly, and the clamping assembly forms a clamping groove, and the pressing roller is clamped in the clamping groove when the cover is in the closed state.

[0015] In some embodiments, the clamping assembly comprises:

[0016] a connecting rod, which is fixedly connected to the host;

[0017] a driving mechanism, which comprises a first end, a second end, and a pressing end connecting the first end and the second end, the first end is rotationally connected to the connecting rod, and the pressing end is elastically connected to the host; and

[0018] a clamping piece, which is connected to the second end, and the clamping piece forms a clamping groove, and the clamping piece is capable of rotating around the axis of the connecting rod when the driving mechanism moves.

[0019] In some embodiments, the printer further comprises a print head assembly, which is movably connected to the host, and the print head assembly elastically abuts against both ends of the pressing roller when the cover is in the closed state, so that the pressing roller abuts against the clamping assembly.

[0020] In some embodiments, the cover comprises two mounting plates which are spaced apart along the axial direction of the pressing roller, and the mounting plates are provided with mounting holes, the pressing roller is inserted into the mounting holes, and the pressing roller has a gap with the inner wall of the mounting hole.

[0021] In some embodiments, the clamping assembly is provided with two groups, which are respectively arranged at both ends of the pressing roller, and the gap is less than 2 mm.

[0022] In some embodiments, the cover has a rotating end, the rotating end is rotationally connected to the host, and the center of the first transmission gear is located on the side of the center of the second transmission gear which faces the rotating end.

[0023] In some embodiments, the second transmission gear comprises a transmission disc and a meshing disc which are connected to each other, and the transmission disc is arranged on the side of the meshing disc.

[0024] When the cover is in the closed state, the first transmission gear is engaged with the engaging disc, and the first transmission gear is spaced apart from the engaging disc along the axial direction of the compression roller.

[0025] In some embodiments, the compression roller comprises a roller part, a shaft core, and a shaft sleeve set, the roller part is sleeved on the shaft core, the shaft sleeve set is sleeved on the shaft core and located at the end side of the roller part, the shaft sleeve set is movably connected to the cover, and the shaft core is rotatable relative to the cover and the shaft sleeve set.

[0026] In some embodiments, the first transmission gear is arranged at the end of the shaft core, and the first transmission gear is spaced apart from the shaft sleeve set along the axial direction of the engaging disc.

[0027] In some embodiments, the shaft core comprises a middle mounting section and sleeve sections located at both ends of the mounting section, the roller part is sleeved on the mounting section and fixed relative to the mounting section, the shaft sleeve set comprises two shaft sleeves, and the two shaft sleeves are respectively sleeved on the two sleeve sections, and the inner diameter of the shaft sleeve is smaller than the outer diameter of the mounting section.

[0028] In some embodiments, the roller part is an elastic roller part.

[0029] The printer based on the embodiments of the present application comprises a host, a cover, a compression roller, and a driving mechanism, the compression roller is arranged on the cover and has a first transmission gear, the driving mechanism comprises a second transmission gear, the first transmission gear has a first projection in a first plane, the second transmission gear has a second projection in the first plane, the center line of the first projection and the center line of the second projection is a first center line, the first center line extends obliquely, the first plane is perpendicular to the axial line of the compression roller, so that when the cover is switched from the unfolded state to the closed state, the first transmission gear and the second transmission gear are difficult to be concentrically collided, and it is difficult to be abutted and deadlocked, and the first center line extends obliquely, so that when the first transmission gear and the second transmission gear are collided, at least one of the first transmission gear and the second transmission gear is rotated due to the tangential force, so that the first transmission gear and the second transmission gear are more easily engaged, the cover is more easily closed, and the cover is not easily deformed and collapsed. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0031] Figure 1 Structure diagram of a printer according to an embodiment of the present application;

[0032] Figure 2 Structure diagram of the inside of a printer according to an embodiment of the present application;

[0033] Figure 3 Structure diagram of the inside of a printer according to an embodiment of the present application from another perspective;

[0034] Figure 4 Structure diagram of a printer according to an embodiment of the present application; Figure 2 Enlarged structure diagram of A in the above figure

[0035] Figure 5 Structure diagram of a printer according to an embodiment of the present application;

[0036] Figure 6 Structure diagram of a printer according to an embodiment of the present application; Figure 5 Enlarged structure diagram of B in the above figure

[0037] Figure 7 Structure diagram of a printer according to an embodiment of the present application from another perspective;

[0038] Figure 8 Structure diagram of a printer according to an embodiment of the present application;

[0039] Figure 9 Structure diagram of a printer according to an embodiment of the present application; Figure 8 Enlarged structure diagram of C in the above figure

[0040] Figure 10 Structure diagram of a printing roller and a first transmission gear according to an embodiment of the present application;

[0041] Figure 11 Structure diagram of a printing roller and a first transmission gear according to an embodiment of the present application; Figure 10 Sectional structure diagram of A-A in the above figure

[0042] Reference numerals in the figures:

[0043] 100, main body

[0044] 200, cover; 201, mounting plate

[0045] 300, pressing roller; 301, first transmission gear; 310, roller part; 320, shaft core; 321, mounting section; 322, sleeving section; 330, shaft sleeve set

[0046] 400, driving mechanism; 410, second transmission gear; 411, transmission disc; 412, meshing disc

[0047] 500, the hook assembly; 500a, the hook groove; 510, the connecting rod; 520, the driving part; 521, the first connecting end; 522, the second connecting end; 523, the pressing end; 530, the hook piece;

[0048] 600, the print head assembly;

[0049] MM, the first connecting line. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0051] The printer comprises a main machine and a cover, the cover is provided with a pressure roller, also known as a printing roller, which is used to roll and press the object to be printed to improve the printing effect. The main machine is provided with a transmission assembly, one end of the pressure roller is provided with a first transmission gear, and the transmission assembly comprises a second transmission gear. When the cover is closed, the second transmission gear can engage with the first transmission gear, thereby driving the rotation of the first transmission gear.

[0052] In the prior art, when the cover is closed, the first transmission gear and the second transmission gear will interfere with each other and abut against each other, which causes the cover to be difficult to close and to be deformed.

[0053] To solve the above technical problems, please refer to Figures 1-2 The present application proposes a printer which can print objects such as label paper and belts that need to have labels or patterns printed on the surface. In the embodiments of the present application, the printer is exemplarily described as a label printer, i.e. the printer comprises a main machine 100, a cover 200, a pressure roller 300 and a driving mechanism 400. The components of the printer will be described in detail below.

[0054] The main machine 100 is the core component of the entire label printer, responsible for controlling the printing process, processing printing data and providing support and power for other components. The main machine 100 integrates circuit boards, power management modules, data processing units and other key electronic components. When receiving a printing instruction, the print head will spray ink or carbon powder on the object to be printed according to the preset pattern or text information, completing the printing task. The main machine 100 is also provided with a hook assembly 500 and a print head.

[0055] The cover 200 is rotationally connected to the main machine 100. The cover 200 and the main machine 100 are rotationally connected through hinges, sliding rails, shafts and other structures, which can also allow the cover 200 to have a closed state and an unfolded state, and the cover 200 can be flexibly switched between the closed state and the unfolded state.

[0056] When the cover 200 is in the closed state, the internal printing mechanism and consumables are protected from external interference, and when the cover 200 is in the unfolded state, the user can easily access the printing area to load label paper, clean the printhead assembly 600, or replace the print roller, etc., improving the ease of use and maintenance convenience of the device.

[0057] The pressure roller 300, also known as a print roller, can flatten the label paper during the printing process to ensure print quality, and secondly, when the pressure roller 300 rotates, it can also drive the movement of the label paper to continuously print the label paper.

[0058] The drive mechanism 400 is provided in the main machine 100, and the drive mechanism 400 includes a second transmission gear 410. When the cover 200 is in the closed state, the first transmission gear 301 is engaged with the second transmission gear 410. During printing, the second transmission gear 410 can drive the first transmission gear 301 to rotate, and the first transmission gear 301 can in turn drive the pressure roller 300 to rotate. Through the rotation of the pressure roller 300, the movement of the label paper is also driven, thereby continuously printing the label paper.

[0059] Please refer to Figures 3-4 , the first transmission gear 301 has a first projection in the first plane, and the second transmission gear 410 has a second projection in the first plane. The center line of the first projection and the center line of the second projection is the first line MM, and the first line MM extends obliquely. The first plane is perpendicular to the axis of the pressure roller 300.

[0060] The oblique extension of the first line MM can be understood as the first line MM being relatively inclined to the direction perpendicular to the horizontal workbench surface when the printer is placed on the horizontal workbench surface. In this way, when the cover 200 switches from the unfolded state to the closed state, it is difficult for the first transmission gear 301 and the second transmission gear 410 to have a concentric collision, and it is also difficult for them to be blocked and dead. Since the first line MM extends obliquely, when the first transmission gear 301 and the second transmission gear 410 collide, at least one of them will rotate due to the tangential component of force, thereby making it easier for the first transmission gear 301 and the second transmission gear 410 to engage, making it easier for the cover to close, and the cover 200 is not easy to deform or collapse.

[0061] Optionally, please refer to Figure 3The first connecting line MM extends in a direction forming an angle a with the vertical direction, and a satisfies 5°≤a≤45°, that is, a can be in a range formed by any two of 5°, 15°, 30° and 45°. By setting a in a proper range, the first transmission gear 301 and the second transmission gear 410 can be prevented from being locked, and the first transmission gear 301 can have sufficient contact area with the second transmission gear 410, so that the first transmission gear 301 and the second transmission gear 410 can be fully engaged.

[0062] Optionally, in an embodiment of the present application, the tooth width of the first transmission gear 301 is smaller than the tooth width of the second transmission gear 410. Since the second transmission gear 410 transmits power to the first transmission gear 301, the tooth width of the second transmission gear 410 is set to be larger than that of the first transmission gear 301. Since the tooth width of the first transmission gear 301 is smaller, the first transmission gear 301 can be more easily engaged in the tooth groove of the second transmission gear 410, so that the two gears can be fully engaged, thereby ensuring stable transmission.

[0063] In addition, during the covering stage of the cover 200, the first transmission gear 301 is located between the two sides of the second transmission gear 410 along the axial direction of the first transmission gear 301, so that the probability of misalignment engagement of the first transmission gear 301 and the second transmission gear 410 can be reduced, and the printer can have stable transmission performance during operation, thereby reducing the failure rate caused by transmission failure.

[0064] It should be understood that, since the pressure roller 300 needs to drive the label paper to move during printing, in some embodiments, the pressure roller 300 is inserted into the mounting hole provided in the cover 200. In order to ensure the rotation of the pressure roller 300, the outer wall of the pressure roller 300 has a gap with the inner wall of the mounting hole. The gap not only enables the pressure roller 300 to rotate, but also enables the pressure roller 300 to slide along the axial direction of the pressure roller 300.

[0065] Since the limiting mechanism is provided on the cover 200 or the pressure roller 300 to prevent the pressure roller 300 from being pulled out, the pressure roller 300 slides in the sliding area. When the pressure roller 300 is located in the sliding area, the first transmission gear 301 is located between the two sides of the second transmission gear 410 along the axial direction of the second transmission gear 410, that is, during the covering process of the cover 200, no matter where the pressure roller 300 is located, the first transmission gear 301 and the second transmission gear 410 can still have sufficient contact area when the cover 200 is in the covering state, that is, the first transmission gear 301 and the second transmission gear 410 can be fully engaged, thereby ensuring stable transmission.

[0066] Please refer to Figures 5-6In an embodiment of the present application, the host 100 is provided with a clamping assembly 500, which forms a clamping groove 500a. When the cover 200 is in the closed state, the pressure roller 300 is clamped in the clamping groove 500a.

[0067] By clamping the pressure roller in the clamping groove 500a, the stability of the cover 200 in the closed state can be ensured, i.e. the cover 200 does not need to be provided with another locking mechanism to ensure the stability of the cover 200 in the closed state, which is conducive to the miniaturization and lightweight design of the entire printer.

[0068] Based on the good stability of the cover 200 in the closed state, the stability of the engagement of the first transmission gear 301 and the second transmission gear 410 can be ensured. In addition, the stable pressure roller can also ensure the stability and accuracy during the printing process, avoiding the printing quality problems caused by the shaking or displacement of the pressure roller.

[0069] As described above, during the closing process of the cover 200, the clamping assembly 500 rotates under the abutting action of the pressure roller. In order to limit the pressure roller from being pulled out, the clamping assembly 500 needs to be restored to its original state, thereby completing the clamping of the pressure roller. Please refer to Figure 6 In an embodiment of the present application, the clamping assembly 500 includes a connecting rod 510, a driving part 520, and a clamping piece 530.

[0070] The connecting rod 510 is fixedly connected to the host 100. The driving part 520 includes a first connecting end 521, a second connecting end 522, and a pressing end 523 connecting the first connecting end 521 and the second connecting end 522. The first connecting end 521 is rotationally connected to the connecting rod 510. The pressing end 523 is elastically connected to the host 100. The clamping piece 530 is connected to the second connecting end 522 and rotationally connected to the host 100. The clamping piece 530 forms the clamping groove 500a. When the driving part 520 moves, the clamping piece 530 can rotate relative to the host 100.

[0071] In an embodiment, the pressing end 523 is elastically connected to the host 100 by a spring, i.e. one end of the spring is connected to the pressing end 523, and the other end is connected to the host 100. During the process in which the pressure roller 300 enters the clamping groove 500a by abutting the clamping piece 530, the spring is in a stretched state at this time. When the pressure roller 300 is clamped in the clamping groove 500a, the spring resets, so that the pressure roller 300 is stably clamped in the clamping groove 500a, ensuring the printing effect.

[0072] In addition, by pressing the pressing end 523, the clamping hook piece 530 can also be driven to rotate, so as to adjust the direction of the notch of the clamping hook groove 500a, so that the pressure roller 300 can be separated from the clamping hook groove 500a when the cover 200 is switched from the closed state to the unfolded state, and it is difficult to interfere with the rotation of the cover 200.

[0073] Among them, the driving part 520 can be provided with two, respectively located at both ends of the connecting rod 510, and the clamping hook piece 530 can also be provided with two, so that the clamping hook groove 500a formed also has two, so as to clamp the pressure roller 300 from both ends, thereby improving the stability of the pressure roller 300.

[0074] It should be understood that since the two clamping hook pieces 530 are respectively located at both ends of the connecting rod 510, in order to ensure that the pressure roller 300 can be clamped in the two clamping hook grooves 500a synchronously, the two clamping hook pieces 530 can be connected together through a connecting piece, so that when one pressing end 523 is pressed, the two clamping hook pieces 530 can be rotated synchronously relative to the host 100 under the action of the connecting piece.

[0075] In another embodiment of the present application, please refer to Figure 7 , the printer further comprises a print head assembly 600, which is movably connected to the host 100, and when the cover 200 is in the closed state, the print head assembly 600 elastically abuts against both ends of the pressure roller 300, so that the pressure roller 300 abuts against the clamping hook assembly 500.

[0076] Among them, the print head assembly 600 can form a printing channel with the pressure roller 300, and the printing channel can pass through the printing consumables such as label paper and carbon tape. By elastically abutting the print head assembly 600 against the pressure roller 300, the pressure roller 300 abuts against the clamping hook assembly 500, that is, it can ensure that the carbon tape and the label paper are stably attached together, thereby ensuring the printing effect.

[0077] Secondly, by abutting the pressure roller 300 against the clamping hook assembly 500, it is ensured that the pressure roller 300 is difficult to move relative to the cover 200, that is, the stability of the engagement between the first transmission gear 301 and the second transmission gear 410 is ensured.

[0078] It should also be understood that since the print head assembly 600 elastically abuts against both ends of the pressure roller 300, it can ensure that the pressure roller 300 can remain horizontal, even if the pressure roller 300 has a first transmission gear 301 on one side, it is difficult to tilt the entire pressure roller 300 due to gravity, thereby ensuring that the first transmission gear 301 can be stably engaged with the second transmission gear 410 when the cover 200 is closed.

[0079] Please refer to Figures 8-9In an embodiment of the present application, the cover 200 comprises two mounting plates 201 spaced along the axial direction of the compression roller 300, and mounting holes are formed in the mounting plates 201, and the compression roller 300 is inserted into the mounting holes. The mounting plates 201 serve as a support structure for the compression roller 300, and can ensure that the compression roller 300 has good stability after being mounted.

[0080] The gap between the compression roller 300 and the inner wall of the mounting hole allows the compression roller 300 to have a certain space for movement in the mounting hole. The gap can reduce the influence of assembly errors, thereby ensuring smooth meshing between the compression roller 300 and the gear.

[0081] Further, the catch assembly 500 is provided in two groups, one on each end of the compression roller 300. By providing the catch assembly 500 on both ends of the compression roller 300, the compression roller 300 can be more effectively fixed, preventing it from tilting or shaking during transmission, enhancing the stability of the compression roller 300 in the mounting hole, and ensuring that it maintains the correct position and posture under various working conditions.

[0082] When the compression roller 300 meshes with the gear, the alignment accuracy between the two needs to be ensured. If the compression roller 300 tilts or shakes, it may cause one side of the compression roller 300 close to the gear to be caught in the catch assembly 500, while the other side is not caught, which can affect the smoothness of the transmission and may also cause damage to the gear. By controlling the gap between the compression roller 300 and the inner wall of the mounting hole to be less than 2mm, the compression roller 300 can maintain the correct position and posture during meshing, thereby reducing the occurrence of the situation where one side of the compression roller 300 is caught in the catch assembly 500, while the other side is difficult to be caught in the catch assembly 500.

[0083] Since the cover 200 is rotationally connected to the main machine 100, the cover 200 has a rotating end that is rotationally connected to the main machine 100. The center of the first transmission gear 301 is on the side of the center of the second transmission gear 410 facing the rotating end. In this way, the shorter force arm allows the cover 200 to better resist deformation and damage when subjected to external forces, which helps to enhance the strength of the entire transmission structure, thereby improving the durability and reliability of the equipment.

[0084] Please refer to Figure 4 In an embodiment of the present application, the second transmission gear 410 comprises a transmission disc 411 and a meshing disc 412 connected to each other. The transmission disc 411 is arranged on the side of the meshing disc 412, and the meshing disc 412 is used to mesh with the first transmission gear 301, while the transmission disc 411 is used to connect with the driving member. The rotation of the transmission disc 411 is driven by the driving member, which in turn drives the rotation of the meshing disc 412, and further drives the rotation of the first transmission gear 301, finally realizing the rotation of the entire compression roller 300, and ensuring the stability and continuity of printing.

[0085] The transmission disc 411 can be integrally formed with the meshing disc 412, thereby ensuring the structural strength of the entire second transmission gear 410, and when the first transmission gear 301 meshes with the meshing disc 412, the first transmission gear 301 is spaced apart from the meshing disc 412 in the axial direction of the meshing disc 412, that is, the first transmission gear 301 is difficult to contact the transmission disc 411 during rotation of the compression roller 300, which not only reduces the wear of the structure and prolongs the service life of the equipment, but also ensures the stable rotation of the compression roller 300, thereby ensuring the stability and continuity of printing.

[0086] In order to further improve the stability and continuity of printing, in an embodiment of the present application, please refer to Figures 10-11 The compression roller 300 includes a roller portion 310, a shaft core 320, and a shaft sleeve set 330. The roller portion 310 is sleeved on the shaft core 320, the shaft sleeve set 330 is sleeved on the shaft core 320 and located at the end side of the roller portion 310, the shaft sleeve set 330 is connected to the cover 200, and the shaft core 320 can rotate relative to the cover 200 and the shaft sleeve set 330.

[0087] When the shaft sleeve set 330 is connected to the cover 200, the shaft sleeve set 330 is difficult to rotate relative to the cover 200 or is basically stationary through the gap between the shaft sleeve set 330 and the cover 200. Thus, when the cover 200 is in the closed state, the roller portion 310 and the shaft core 320 rotate under the driving action of the first transmission gear 301, and the friction generated is mainly the friction between the shaft core 320 and the shaft sleeve set 330. Since the shaft core 320 is a smooth metal rod, even if friction is generated, the friction between the shaft core 320 and the shaft sleeve set 330 is relatively small, so that the smoothness of the shaft core 320 during rotation can be improved.

[0088] It should be understood that during printing, the roller portion 310 contacts the label paper, so the roller portion 310 and the shaft core 320 rotate synchronously, that is, the roller portion 310 is relatively fixed to the shaft core 320. When the roller portion 310 is fixed relative to the shaft core 320, it can be fixed by interference fit or key connection, that is, a key groove is processed on the shaft core 320, and a corresponding key hole is formed on the inner diameter of the roller portion 310. Then the key is inserted into the key groove and the key hole, and the roller portion 310 is fixed on the shaft core 320 through the transmission torque action of the key. It can also be a threaded connection or a glue connection, etc. In the embodiments of the present application, it is not limited, as long as the roller portion 310 can be stably connected to the shaft core 320.

[0089] Please return and refer to Figure 11Further, the first transmission gear 301 is arranged at the end of the shaft core 320 and spaced apart from the shaft sleeve set 330 along the axial direction of the pressure roller 300. In this way, when the first transmission gear 301 rotates, the transmission gears of the first transmission gear 301 will not interfere with the shaft sleeve set 330, that is, the shaft sleeve set 330 is fixed relative to the cover 200, thereby further ensuring smooth rotation of the shaft core 320 and the roller part 310.

[0090] In an embodiment of the present application, referring to Figure 11 The shaft core 320 includes a middle mounting section 321 and sleeve sections 322 at both ends of the mounting section 321, and the roller part 310 is sleeved on the mounting section 321 and fixed relative to the mounting section 321. The shaft sleeve set 330 includes two shaft sleeves, and the two shaft sleeves are respectively sleeved on the two sleeve sections 322, and the inner diameter of the shaft sleeve is smaller than the outer diameter of the mounting section 321.

[0091] That is, the outer diameter of the mounting section 321 is greater than the inner diameter of the sleeve section 322, so that the two ends of the mounting section 321 can limit the shaft sleeve, determine the mounting position of the roller part 310 and the shaft sleeve, and also avoid interference between the roller part 310 and the shaft sleeve. The two shaft sleeves are respectively sleeved on both ends of the shaft core 320 to provide more balanced and stable support for the printing roller, which helps to reduce the vibration and shaking of the printing roller during high-speed rotation, thereby ensuring the stability and consistency of the printing quality.

[0092] Further, the roller part 310 is an elastic roller part 310, that is, the material of the roller part 310 is elastic. Optionally, the roller part 310 adopts rubber or silicone. The elastic material has good flexibility and recovery, which can better adhere to the label paper during printing to ensure uniform ink transmission, thereby improving the printing quality.

[0093] In addition, the elastic roller part 310 can absorb part of the vibration and impact during printing, reduce the generation of noise, and improve the running stability of the equipment.

[0094] The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary description, and cannot be understood as a limitation of the present patent. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0095] The above only describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A printer characterized by comprising: The printer comprises: a main body; a cover body rotatably connected with the main body to have a closed state and an unfolded state; a pressing roller provided on the cover body, the pressing roller being provided with a first transmission gear; a driving mechanism provided on the main body, the driving mechanism comprising a second transmission gear, the first transmission gear being engaged with the second transmission gear when the cover body is in the closed state; wherein the first transmission gear has a first projection on a first plane, the second transmission gear has a second projection on the first plane, a line connecting the center of the first projection and the center of the second projection is a first line, the first line extends obliquely, and the first plane is perpendicular to the axis of the pressing roller. An included angle between the extension direction of the first line and the vertical direction is α, and α satisfies 5°≤α≤45°.

2. The printer of claim 1, wherein, The tooth width of the first transmission gear is smaller than the tooth width of the second transmission gear.

3. The printer of claim 1, wherein, The pressing roller is located in the cover body, and the pressing roller can slide relative to the cover body along the axial direction of the pressing roller to have a sliding area, the first transmission gear is located between the two sides of the second transmission gear along the axial direction of the second transmission gear when the pressing roller is located in the sliding area.

4. The printer of claim 1, wherein, A clamping hook assembly is arranged on the main body, the clamping hook assembly forms a clamping hook slot, and the pressing roller is clamped in the clamping hook slot when the cover body is in the closed state.

5. The printer of claim 1, wherein, The clamping hook assembly comprises:

6. The printer of claim 5, wherein, a connecting rod fixedly connected with the main body; a driving part comprising a first connecting end, a second connecting end and a pressing end connecting the first connecting end and the second connecting end, the first connecting end being rotatably connected with the connecting rod, and the pressing end being elastically connected with the main body; and a clamping hook piece connected with the second connecting end, the clamping hook piece forming a clamping hook slot, and the clamping hook piece being capable of rotating around the axis of the connecting rod when the driving part moves. The printer further comprises a print head assembly movably connected with the main body, the print head assembly elastically abutting against both ends of the pressing roller when the cover body is in the closed state, so that the pressing roller abuts against the clamping hook assembly.

7. The printer of claim 5, wherein, The cover body comprises two mounting plates spaced apart along the axial direction of the pressing roller, mounting holes are formed in the mounting plates, the pressing roller is inserted into the mounting holes, and a gap is formed between the pressing roller and the inner wall of the mounting hole.

8. The printer of claim 5, wherein, The clamping hook assembly is provided with two groups of clamping hook assemblies arranged at both ends of the pressing roller, and the gap is less than 2mm.

9. The printer of claim 8, wherein, The cover body has a rotating end rotatably connected with the main body, and the center of the first transmission gear is located on the side of the center of the second transmission gear facing the rotating end.

10. The printer of claim 1, wherein, The second transmission gear comprises a transmission disc and an engaging disc connected with each other, and the transmission disc is arranged on the side of the engaging disc.

11. The printer of claim 1, wherein, When the cover body is in the closed state, the first transmission gear is engaged with the engaging disc, and the first transmission gear and the engaging disc are arranged at intervals along the axial direction of the engaging disc. ​ 12. The printer of claim 1, wherein, The pressing roller comprises a roller part, a shaft core and a shaft sleeve set, the roller part is sleeved on the shaft core, the shaft sleeve set is sleeved on the shaft core and located at the end side of the roller part, the shaft sleeve set is connected to the cover body, and the shaft core can rotate relative to the cover body and the shaft sleeve set.

13. The printer of claim 12, wherein, The first transmission gear is arranged at the end of the shaft core and spaced apart from the shaft sleeve set along the axial direction of the pressing roller.

14. The printer of claim 12, wherein, The shaft core comprises a middle mounting section and sleeve sections located at both ends of the mounting section, the roller part is sleeved on the mounting section and fixed relative to the mounting section, the shaft sleeve set comprises two shaft sleeves, the two shaft sleeves are respectively sleeved on the two sleeve sections, and the inner diameter of the shaft sleeve is smaller than the outer diameter of the mounting section.

15. The printer of claim 12, wherein, The roller part is an elastic roller part.

Images