A distortion-proof label printing device

Abstract

The application discloses a kind of anti-deformation label printing device, belong to label printing technical field, the device includes lower body, and the one end of lower body is rotatably connected with upper cover body, and the bottom of upper cover body is provided with print head near rotating opening, and the upper end of lower body is provided with conveying rubber roller near rotating opening, and the upper end of lower body is provided with heat-sensitive paper frame, and heat-sensitive paper frame clamps paper roll, and the upper end of lower body between heat-sensitive paper frame and conveying rubber roller is provided with support roller, and the upper cover body is provided with perspective window, and the lower of conveying rubber roller is provided with rubber roller support, and conveying rubber roller is rotatably connected with rubber roller support, and the upper end of lower body is provided with mounting chamber near print head, and the inside of mounting chamber is installed with inclined assembly, and rubber roller support is rotatably connected with the rotation of U-shaped rotating frame through rotating lug to realize self-adapting swing, and simultaneously rotating plate pushes sliding seat to slide along sliding rod and compresses corresponding side support spring, so that conveying rubber roller always keeps parallel with print head.

Description

Technical Field

[0001] This invention belongs to the field of label printing technology, and more specifically, relates to a label printing device that prevents deformation. Background Technology

[0002] Thermal printers are widely used in warehousing, logistics, and point-of-sale (POS) scenarios. They typically use thermal technology to create images or text on thermal paper, after which the printed paper is removed. Currently, thermal printers generally use two types of label paper: one where the face stock is attached to release paper with adhesive, the printed image is thermally transferred to the face stock, and after printing, the face stock needs to be peeled off the release paper before being attached to the item; the other type has no release paper, only the face stock, where after printing, adhesive or double-sided tape is applied to the opposite side of the printed surface before the face stock is attached to the item.

[0003] Publication No. CN219988802U discloses a thermal printer, including a housing and a paper feed roller rotatably mounted in the housing. The thermal printer also includes an attachment assembly for supplying adhesive. As the paper feed roller rotates, the adhesive is attached to the imaging medium. By providing the attachment assembly in the thermal printer, the adhesive can be attached to the back of the imaging medium during the printing process, thereby eliminating the need for manual addition of adhesive and improving efficiency.

[0004] Existing thermal printheads are prone to tilting or slight deformation of the mounting base under long-term pressure, continuous printing thermal expansion and contraction, and frequent opening and closing of the cover. Existing rubber rollers are mostly rigidly fixed or only have a whole up and down floating structure, which cannot adaptively compensate for the tilt deviation of the printhead. This causes the parallelism between the rubber roller and the printhead to fail. Excessive pressure on one side of the label causes squeezing wrinkles and deformation, while insufficient pressure on the other side results in light printing and ghosting. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] To address the issues raised in the background art, such as the tendency for thermal printheads to tilt or undergo slight deformation of the mounting base under prolonged pressure, continuous printing thermal expansion and contraction, and frequent opening and closing of the cover, and the fact that existing rubber rollers are mostly rigidly fixed or only have a single floating structure, which cannot adaptively compensate for the tilt deviation of the printhead, resulting in the failure of the parallelism between the rubber roller and the printhead, excessive pressure on one side of the label causing squeezing wrinkles and deformation, and insufficient pressure on the other side causing faint printing and ghosting, the present invention adopts the following technical solution.

[0007] A deformation-resistant label printing device includes a lower body, an upper cover rotatably connected to one end of the lower body, a print head disposed at the bottom of the upper cover near the rotating opening, a conveying roller disposed at the upper end of the lower body near the rotating opening, a thermal paper holder disposed at the upper end of the lower body, the thermal paper holder clamping a paper roll, a support roller disposed at the upper end of the lower body between the thermal paper holder and the conveying roller, a viewing window disposed on the upper cover, a roller bracket disposed below the conveying roller, the conveying roller and the roller bracket being rotatably connected, and an installation chamber disposed at the upper end of the lower body near the print head, an inclined component being installed inside the installation chamber, the inclined component ensuring that the conveying roller is always parallel to the print head.

[0008] Preferably, a floating adjustment component is installed on the rubber roller bracket, and the conveying rubber roller is rotatably connected to the floating adjustment component, which enables the conveying rubber roller to float up and down adaptively.

[0009] Preferably, the tilting assembly includes a rotating ear, a U-shaped rotating frame, a sliding rod, a sliding seat, a support spring, and a rotating plate. The rotating ear is fixedly connected to the bottom of the rubber roller bracket. The U-shaped rotating frame is detachably connected to the bottom of the inner side of the mounting chamber. The rotating ear is rotatably connected to the inside of the U-shaped rotating frame. Sliding rods are detachably connected to the front and rear sides of the inside of the mounting chamber. Sliding seats are slidably connected to the left and right outer walls of the sliding rods. Support springs are sleeved on the left and right outer walls of the sliding seats. Rotating plates are rotatably connected to both sides of the rubber roller bracket. The rotating plates are rotatably connected to the sliding seats. When the print head is tilted and the conveying rubber roller presses the thermal paper against the print head, the rubber roller bracket, through the rotating ear and the rotational connection of the U-shaped rotating frame, causes the rubber roller bracket to drive the conveying rubber roller to tilt adaptively.

[0010] Preferably, the floating adjustment component includes a cross groove, a cross sliding block, and a primary spring. The inner wall of the rubber roller bracket is provided with cross grooves on both sides, and the cross sliding blocks are slidably connected inside the cross grooves on both sides. The conveying rubber roller is rotatably connected to the cross sliding blocks on both sides. A servo motor is detachably connected to the outer wall of one side of the cross sliding block. The rotating end of the servo motor is connected to one end of the conveying rubber roller. A primary spring is fixedly provided between the bottom end of the cross groove and the cross sliding plate. After the upper cover is closed, the conveying rubber roller contacts the thermal paper. According to the thickness of the thermal paper, the conveying rubber roller moves downward with the two rubber roller brackets and compresses the primary spring, thereby enabling the conveying rubber roller to float adaptively according to the thickness of the thermal paper.

[0011] Preferably, a cross sliding plate is slidably connected inside the cross groove below the rubber roller bracket. The upper end of the primary spring is fixedly connected to the bottom of the cross sliding plate. The two ends of the secondary spring are fixedly connected between the cross sliding plate and the rubber roller bracket. The elastic stroke of the secondary spring is less than that of the primary spring, and the elastic force of the secondary spring is less than that of the primary spring.

[0012] Preferably, the inner walls of both sides of the rubber roller bracket are provided with sliding grooves, and sliders are slidably connected inside the sliding grooves on both sides. Connecting plates are fixedly connected to the outer walls of the sliders on both sides. The two ends of the connecting plates extend to the outer walls of the cross sliding blocks, and the two ends of the connecting plates are fixed to the cross sliding blocks with fastening bolts. A feeding rectangular track is fixedly connected to the outer wall of the connecting plate, and the feeding rectangular track is opposite to the conveying rubber roller.

[0013] Preferably, a heat dissipation component is provided on the rectangular feeding track, which dissipates heat from the thermal paper inside the rectangular feeding track.

[0014] Preferably, the heat dissipation component includes a miniature silent axial fan, and the upper end of the rectangular unloading track is provided with multiple through slots, and the miniature silent axial fan is detachably connected to the upper end of the rectangular unloading track.

[0015] Preferably, the outer walls on both sides of the rectangular feeding track are provided with multiple air outlets. A miniature silent axial fan blows the external cooling air into the interior of the rectangular feeding track through the through slot and flows outward from the air outlets on both sides.

[0016] Preferably, mounting brackets are fixedly connected to the upper two sides of the rectangular track near the conveying roller, and guide rollers are rotatably connected between the two mounting brackets.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. In this invention, by means of a tilting component, when the print head tilts to one side due to long-term use or frequent opening and closing of the cover, the roller bracket achieves adaptive swinging through the rotating ear and the U-shaped rotating frame. At the same time, the rotating plate pushes the sliding seat to slide along the sliding rod and compresses the corresponding side support spring, so that the conveying roller always remains parallel to the print head, avoiding the squeezing wrinkles, deformation, and light printing and ghosting problems caused by uneven pressure on one side of the label, thus improving the stability of printing quality.

[0019] 2. In this invention, by setting a graded floating adjustment structure, when printing on thin thermal paper, only the secondary spring undergoes a small stroke compression, avoiding deformation of the thin paper due to excessive pressure. When printing on thick thermal paper, after the secondary spring has contracted, the cross slide plate drives the primary spring to compress, and the large elastic force of the primary spring ensures a tight fit between the conveying roller and the print head, ensuring clear printing of the content on the thick paper, and realizing adaptive pressure adjustment for thermal paper of different thicknesses.

[0020] 3. In this invention, the printed thermal paper enters the feeding rectangular track linked with the conveying rubber roller. The track is fixed to the cross sliding block by the connecting plate. It can float up and down with the conveying rubber roller and swing left and right with the rubber roller bracket, always accurately aligning with the conveying rubber roller, physically forcibly straightening the thermal paper, effectively offsetting the internal stress of the paper roll during winding and the bending tendency caused by thermal expansion and contraction after printing.

[0021] 4. In this invention, a miniature silent axial fan at the upper end of the rectangular feeding track blows cooling air into the track through a through slot. The airflow is quickly discharged through the air outlets on both sides, achieving rapid cooling and shaping while the thermal paper is straightened. This completely locks in the straight shape and prevents the thermal paper from springing back and bending after being removed from the track. At the same time, the coating of the cooled thermal paper hardens, avoiding scratches and ghosting caused by friction. Furthermore, the air outlets facing both sides prevent hot air from contacting the print head and the conveyor roller, preventing abnormal heating of components from affecting the printing effect. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a deformation-resistant label printing device according to the present invention;

[0023] Figure 2 This is an exploded view of the printing device in this invention;

[0024] Figure 3 This is a schematic diagram of the exploded side view of the printing device in this invention;

[0025] Figure 4 This is a schematic diagram of the conveying roller structure in this invention;

[0026] Figure 5 In this invention Figure 4 Enlarged structural diagram of section A;

[0027] Figure 6 This is a schematic cross-sectional view of the lower body structure in this invention;

[0028] Figure 7 This is a schematic diagram of the attitude adjustment component structure in this invention;

[0029] Figure 8 This is a schematic diagram of the straightening component structure in this invention;

[0030] Figure 9 In this invention Figure 8 Enlarged structural diagram of section B;

[0031] Figure 10 In this invention Figure 8 Enlarged structural diagram of section C.

[0032] The correspondence between the labels and component names in the attached figures is as follows:

[0033] 100. Lower body; 101. Upper cover; 102. Viewing window; 103. Printhead; 104. Thermal paper holder; 105. Support roller; 106. Mounting chamber;

[0034] 200. Conveyor roller; 201. Roller bracket; 202. Cross slide block; 203. Servo motor; 204. Cross slide groove; 205. Primary spring; 206. Cross slide plate; 207. Secondary spring; 208. Rotating ear; 209. U-shaped rotating frame; 210. Sliding groove;

[0035] 300. Rectangular feeding track; 301. Miniature silent axial fan; 302. Through slot; 303. Air outlet; 304. Connecting plate; 305. Fastening bolt; 307. Slider; 308. Mounting bracket; 309. Guide roller;

[0036] 400. Sliding seat; 401. Rotating plate; 402. Sliding rod; 403. Support spring. Detailed Implementation

[0037] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments. The present invention provides the following embodiments.

[0040] like Figure 1 , Figure 2 as well as Figure 3The diagram shows a preferred embodiment of the present invention: a deformation-resistant label printing device. This embodiment includes a lower body 100, with an upper cover 101 rotatably connected to one end of the lower body 100. A viewing window 102 is provided on the upper cover 101. A thermal paper holder 104 is provided at the upper end of the lower body 100, clamping a paper roll. A print head 103 is provided at the bottom of the upper cover 101 near the rotating opening. The lower body 100 is located near the rotating opening... The upper end is provided with a conveying roller 200, and the lower body 100 between the thermal paper holder 104 and the conveying roller 200 is provided with a support roller 105. In this embodiment, the thermal paper holder 104 clamps the paper roll, and one end of the paper roll is placed on the upper end of the conveying roller 200 through the support roller 105. The upper cover 101 is closed so that one end of the thermal paper is clamped between the conveying roller 200 and the print head 103. The conveying roller 200 rotates to convey the thermal paper outward, and the print head 103 prints the content on the thermal paper.

[0041] Because thermal paper varies in thickness, the conveyor roller 200 needs to adjust its position according to the thickness of the thermal paper. Specific floating components can be adopted as follows: Figure 4 as well as Figure 5 In the illustrated embodiment, a roller support 201 is provided below the conveying roller 200. Cross grooves 204 are provided on both sides of the inner wall of the roller support 201. Cross sliding blocks 202 are slidably connected inside the cross grooves 204 on both sides. The conveying roller 200 is rotatably connected to the cross sliding blocks 202 on both sides. A servo motor 203 is detachably connected to the outer wall of one side of the cross sliding block 202. The rotating end of the servo motor 203 is connected to one end of the conveying roller 200. A primary spring 205 is fixedly provided between the bottom end of the cross groove 204 and the cross sliding plate 206. In this embodiment, after the upper cover 101 is closed, the conveying roller 200 contacts the thermal paper. Based on the thickness of the thermal paper, the conveying roller 200 moves downward with the roller supports 201 on both sides and compresses the primary spring 205. This allows the conveying roller 200 to adaptively float according to the thickness of the thermal paper, ensuring that the thermal paper remains in close contact with the print head 103 during printing, thus guaranteeing the printing effect.

[0042] When the thermal paper is thin, excessive pressure will cause it to deform; conversely, when the thermal paper is thick, insufficient pressure will result in unclear printed content. To allow the conveyor roller 200 to adjust the clamping force according to the thickness of the thermal paper, a specific structure can be adopted as follows: Figure 5In the embodiment shown, a cross slide plate 206 is slidably connected inside the cross slide groove 204 below the rubber roller bracket 201. The upper end of the primary spring 205 is fixedly connected to the bottom of the cross slide plate 206. The two ends of the secondary spring 207 are fixedly connected between the cross slide plate 206 and the rubber roller bracket 201. The elastic stroke of the secondary spring 207 is less than the elastic stroke of the primary spring 205, and the elastic force of the secondary spring 207 is less than the elastic force of the primary spring 205. In this embodiment, when dealing with thin thermal paper, the small stroke of the secondary spring 207 is sufficient to complete the floating adjustment of the conveying rubber roller 200. When dealing with thick thermal paper, after the secondary spring 207 retracts, the cross slide plate 206 will move downward to compress the primary spring 205, which can ensure the printing effect of thick thermal paper.

[0043] Repeated opening and closing of the top cover 101 and prolonged use can cause the print head 103 to tilt to one side, making it unable to adaptively compensate for the tilt deviation of the print head 103. This leads to a failure in the parallelism between the rubber roller and the print head 103, resulting in excessive pressure on one side of the label causing compression wrinkles and deformation, while insufficient pressure on the other side results in faint printing and ghosting. To solve this problem, a specific structure can be adopted as follows: Figure 7 In the embodiment shown, a rotating ear 208 is fixedly connected to the bottom of the roller bracket 201. An installation chamber 106 is provided at the upper end of the lower body 100 near the print head 103. A U-shaped rotating frame 209 is detachably connected to the bottom inner side of the installation chamber 106. The rotating ear 208 is rotatably connected to the interior of the U-shaped rotating frame 209. Sliding rods 402 are detachably connected to the front and rear sides of the interior of the installation chamber 106. Sliding seats 400 are slidably connected to the outer walls of the left and right sides of the sliding rods 402. Supporting springs 403 are sleeved on the outer walls of the sliding seats 400 on both sides of the sliding rods 402. Rotating plates 401 are rotatably connected to both sides of the printing head 103. The rotating plates 401 are rotatably connected to the sliding seat 400. In this embodiment, when the printing head 103 is tilted and the conveying roller 200 presses the thermal paper against the printing head 103, the roller support 201 is rotatably connected to the U-shaped rotating frame 209 through the rotating ear 208. This allows the roller support 201 to drive the conveying roller 200 to tilt adaptively. When tilted, the rotating plate 401 rotates adaptively and pushes the sliding seat 400 to slide along the outer wall of the sliding rod 402, compressing the support spring 403 on the corresponding side. Thus, even when the printing head 103 is tilted, there is still a good printing effect.

[0044] Due to prolonged winding, the paper roll will bend. After being heated and printed by printhead 103, the coating shrinks due to heat. The back of the thermal paper, however, is not directly heated, resulting in completely different expansion and contraction rates. This contraction and contraction creates internal stress, causing the thermal paper to bend towards the printing surface. To straighten the printed thermal paper, a specific structure can be adopted as follows: Figure 8 as well as Figure 9In the embodiment shown, sliding grooves 210 are formed on the inner walls of both sides of the rubber roller bracket 201. Sliding blocks 307 are slidably connected inside the sliding grooves 210. Connecting plates 304 are fixedly connected to the outer walls of the sliding blocks 307. Both ends of the connecting plates 304 extend to the outer walls of the cross sliding blocks 202, and both ends of the connecting plates 304 are fixed to the cross sliding blocks 202 using fastening bolts 305. A feeding rectangular track 300 is fixedly connected to the outer wall of the connecting plates 304, and the feeding rectangular track 300 is opposite to the conveying rubber roller 200. In this embodiment... The printed thermal paper enters the interior of the feeding rectangular track 300 and is straightened. It is detachably connected to the outer wall of the cross sliding block 202 via the connecting plate 304. When the conveying roller 200 floats up and down or the roller bracket 201 swings and tilts left and right, the feeding rectangular track 300 is simultaneously driven to float and tilt. This ensures that the feeding rectangular track 300 is always aligned with the conveying roller 200. Even when the print head 103 and the conveying roller 200 are tilted, the printed thermal paper can still accurately enter the interior of the feeding rectangular track 300 and be straightened.

[0045] After printing, thermal paper is in a softened state at high temperatures. Simply straightening it physically cannot eliminate the internal and thermal stresses of the roll. It will quickly spring back and bend after being removed. To fix the straightened paper, it needs to be cooled. A suitable cooling structure could be as follows: Figure 8 In the embodiment shown, the upper end of the rectangular feeding track 300 is provided with multiple through slots 302, and the outer walls on both sides of the rectangular feeding track 300 are provided with multiple air outlets 303. A miniature silent axial flow fan 301 is detachably connected to the upper end of the rectangular feeding track 300. In this embodiment, the miniature silent axial flow fan 301 blows external cooling air into the interior of the rectangular feeding track 300 through the through slots 302 and flows outward from the air outlets 303 on both sides, thereby quickly cooling the thermal paper. Furthermore, the air outlets 303 are located on both sides of the rectangular feeding track 300 to prevent hot air from contacting the print head 103 or the conveying roller 200, thus preventing abnormal heating of the print head 103 and the conveying roller 200.

[0046] To ensure the printed thermal paper can better enter the rectangular feed track 300, the specific structure can be as follows: Figure 10 In the embodiment shown, mounting brackets 308 are fixedly connected to both sides of the upper end of the feeding rectangular track 300 near the conveying roller 200, and guide rollers 309 are rotatably connected between the two mounting brackets 308. In this embodiment, the printed thermal paper is guided into the interior of the feeding rectangular track 300 by the guide rollers 309 to prevent the thermal paper from deviating.

[0047] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted herein.

Claims

1. A label printing device for preventing deformation, comprising a lower body (100), an upper cover (101) rotatably connected to one end of the lower body (100), a print head (103) disposed at the bottom of the upper cover (101) near the rotating opening, a conveying roller (200) disposed at the upper end of the lower body (100) near the rotating opening, a thermal paper holder (104) disposed at the upper end of the lower body (100), the thermal paper holder (104) clamping a paper roll, a support roller (105) disposed at the upper end of the lower body (100) between the thermal paper holder (104) and the conveying roller (200), and a viewing window (102) disposed on the upper cover (101), characterized in that, A roller support (201) is provided below the conveyor roller (200), and the conveyor roller (200) is rotatably connected to the roller support (201). An installation chamber (106) is provided at the upper end of the lower body (100) near the print head (103). An inclined component is installed inside the installation chamber (106), which makes the conveyor roller (200) always parallel to the print head (103).

2. The anti-deformation label printing device according to claim 1, characterized in that, A floating adjustment component is installed on the rubber roller bracket (201). The conveying rubber roller (200) is rotatably connected to the floating adjustment component, which enables the conveying rubber roller (200) to float up and down adaptively.

3. The anti-deformation label printing device according to claim 1, characterized in that, The tilting assembly includes a rotating ear (208), a U-shaped rotating frame (209), a sliding rod (402), a sliding seat (400), a support spring (403), and a rotating plate (401). The rotating ear (208) is fixedly connected to the bottom of the rubber roller bracket (201). The U-shaped rotating frame (209) is detachably connected to the bottom of the inner side of the mounting chamber (106). The rotating ear (208) is rotatably connected to the inside of the U-shaped rotating frame (209). Sliding rods (402) are detachably connected to the front and rear sides of the inside of the mounting chamber (106). The left and right outer walls of the sliding rods (402) are slidably connected. A sliding seat (400) is connected, and a sliding rod (402) is located on the outer walls of the left and right sides of the sliding seat (400) with a support spring (403). The two sides of the rubber roller bracket (201) are rotatably connected with rotating plates (401). The rotating plates (401) are rotatably connected to the sliding seat (400). When the print head (103) is tilted and the conveying rubber roller (200) presses the thermal paper against the print head (103), the rubber roller bracket (201) is rotatably connected to the U-shaped rotating frame (209) through the rotating ear (208), so that the rubber roller bracket (201) drives the conveying rubber roller (200) to tilt adaptively.

4. The anti-deformation label printing device according to claim 2, characterized in that, The floating adjustment assembly includes a cross groove (204), a cross sliding block (202), and a primary spring (205). The inner wall of the rubber roller bracket (201) is provided with cross grooves (204) on both sides. Cross sliding blocks (202) are slidably connected inside the two cross grooves (204). The conveying rubber roller (200) is rotatably connected to the two cross sliding blocks (202). A servo motor (203) is detachably connected to the outer wall of one cross sliding block (202). The rotation of the servo motor (203)... The moving end is connected to one end of the conveying roller (200) for transmission. A first-stage spring (205) is fixedly installed between the bottom end of the cross slide groove (204) and the cross slide plate (206). After the upper cover (101) is closed, the conveying roller (200) contacts the thermal paper. According to the thickness of the thermal paper, the conveying roller (200) moves downward with the roller supports (201) on both sides and compresses the first-stage spring (205). Thus, the conveying roller (200) can adaptively float according to the thickness of the thermal paper.

5. The anti-deformation label printing device according to claim 4, characterized in that, Inside the cross slide groove (204), a cross slide plate (206) is slidably connected below the rubber roller bracket (201). The upper end of the first-stage spring (205) is fixedly connected to the bottom of the cross slide plate (206). The two ends of the second-stage spring (207) are fixedly connected between the cross slide plate (206) and the rubber roller bracket (201). The elastic stroke of the second-stage spring (207) is less than that of the first-stage spring (205), and the elastic force of the second-stage spring (207) is less than that of the first-stage spring (205).

6. The anti-deformation label printing device according to claim 1, characterized in that, The inner walls of the two sides of the rubber roller bracket (201) are provided with sliding grooves (210). The sliding grooves (210) on both sides are slidably connected with sliders (307). The outer walls of the sliders (307) on both sides are fixedly connected with connecting plates (304). The two ends of the connecting plates (304) extend to the outer walls of the cross sliding blocks (202). The two ends of the connecting plates (304) are fixed to the cross sliding blocks (202) with fastening bolts (305). The outer walls of the connecting plates (304) are fixedly connected with a feeding rectangular track (300). The feeding rectangular track (300) is opposite to the conveying rubber roller (200).

7. The anti-deformation label printing device according to claim 6, characterized in that, A heat dissipation component is provided on the feeding rectangular track (300) to dissipate heat from the thermal paper inside the feeding rectangular track (300).

8. The anti-deformation label printing device according to claim 7, characterized in that, The heat dissipation assembly includes a miniature silent axial fan (301), and multiple through slots (302) are provided at the upper end of the blanking rectangular track (300). The miniature silent axial fan (301) is detachably connected to the upper end of the blanking rectangular track (300).

9. The anti-deformation label printing device according to claim 8, characterized in that, Multiple air outlets (303) are provided on the outer walls of both sides of the feeding rectangular track (300). The external cooling air is blown into the interior of the feeding rectangular track (300) through the through slot (302) by a miniature silent axial flow fan (301), and flows outward from the air outlets (303) on both sides.

10. The anti-deformation label printing device according to claim 7, characterized in that, The upper ends of the feeding rectangular track (300) near the conveying rubber roller (200) are fixedly connected to the mounting brackets (308), and the mounting brackets (308) on both sides are rotatably connected to the guide roller (309).

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