A portable item validity period label printer

Abstract

The present invention relates to a portable item validity period label printer, comprising a body, a door hingedly mounted on the body, a reeling mechanism mounted inside the body, a printing mechanism mounted inside the body, a separating mechanism mounted inside the body, an outlet mounted on the body, and first and second control modules mounted on the body; the reeling mechanism comprises a first base mounted on the body, a first rotating shaft with one end passing through and rotatably mounted on the body, a second rotating shaft with one end rotatably mounted on the body, a third rotating shaft and a fourth rotating shaft with one end rotatably mounted on the body, a fifth rotating shaft and a sixth rotating shaft with one end rotatably mounted on the body, and a first motor mounted on the first base and used to drive the first rotating shaft to rotate. The printer automatically separates the label from the backing paper, and after separation, the front end of the label tilts upward, making it easier for medical personnel to pinch the tilted end and peel the label off the backing paper, thereby saving time and effort and reducing the workload of medical personnel.

Description

Technical Field

[0001] The present invention relates to the field of printing technology, and in particular to a portable item validity period label printer. Background Art

[0002] In clinical practice, many sterile items (such as dry cotton swabs, sterile cotton swabs, sterile trays, etc.) need to be marked with the opening time and expiration time after opening. Different items have different effective times due to different materials and application ranges, so the opening time and expiration time need to be marked for each item. Since most medical staff mark items manually, and sometimes they forget to mark or mark items improperly due to busy work, automatic marking devices, namely label printers, have appeared on the market. However, after the label is printed, it is necessary to manually remove the label from the base paper and stick it to the corresponding item. However, when manually removing the label, it is often necessary to first pry open the edge of the label to make it slightly tilted up, and then pinch this position to peel off the label. This process is time-consuming and labor-intensive, increasing the workload of medical staff. Summary of the Invention

[0003] In view of the problems in the prior art, the present invention provides a portable item validity period label printer.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a portable item validity period label printer, including a body, a door hinged on the body, a winding mechanism arranged inside the body, a printing mechanism arranged inside the body, a separation mechanism arranged inside the body, an outlet arranged on the body, a first control module and a second control module arranged on the body; the winding mechanism includes a first base arranged on the body, a first rotating shaft with one end passing through and rotatably arranged on the body, a second rotating shaft with one end rotatably arranged on the body, a third rotating shaft and a fourth rotating shaft with one end rotatably arranged on the body, a fifth rotating shaft and a sixth rotating shaft with one end rotatably arranged on the body, and a first motor arranged on the first base and used to drive the first rotating shaft to rotate; the diameters of the first to fifth rotating shafts are all set to be the same, and the diameter of the sixth rotating shaft is much smaller than the diameter of the first rotating shaft.

[0005] Specifically, the first rotating shaft is fixedly provided with a first sleeve, a first limiting ring is fixedly provided on the first rotating shaft, and a first reel is movably provided on the first sleeve.

[0006] Specifically, the second shaft is fixedly provided with a second sleeve, a second limiting ring is fixedly provided on the second shaft, a second reel is movably provided on the second sleeve, a base paper is wound around the reel, and a label is provided on the base paper.

[0007] Specifically, a first guide member is provided between the third rotating shaft and the fourth rotating shaft, and a second guide member is provided between the fifth rotating shaft and the first rotating shaft; the first guide member and the second guide member have the same structure.

[0008] Specifically, the first guide member includes a plate body with one end fixed on the machine body, a first guide block fixed on the plate body, and a second guide block.

[0009] The cam is adapted to move the movable member into engagement with the movable member so as to move the movable member into engagement with the movable member and the movable member being movable in engagement with the movable member.

[0010] Specifically, the separation mechanism includes a second support plate fixed on the machine body at one end, a continuous air intake component provided on the second support plate, a hollow plate provided on the machine body, an automatic air injection component provided on the continuous air intake component, a connecting pipe connected to the hollow plate, and multiple blowing holes provided on the hollow plate.

[0011] The transmission gear of the present invention is a gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a or a plurality of gears selected from the group consisting of a plurality of gears, a plurality of gears having respective opposite ends, and a plurality of gears selected from the group consisting of a plurality of gears and a plurality of gears.

[0012] The transmission gear of the present invention is a gear which is connected with the gear of the gear train of the said cam and the gear train is connected with the gear of the gear train of the said cam, and the gear train of the said gear train is connected with the gear of the gear train of the said cam.

[0013] Specifically, the machine body is provided with an auxiliary winding assembly, which includes a fourth support plate fixed on the machine body, a movable rod passing through and movably arranged on the fourth support plate, an arc plate fixed on the movable rod, and a sixth spring with one end arranged on the arc plate and the other end arranged on the fourth support plate.

[0014] The beneficial effects of the present invention are:

[0015] (1) The bottom paper is rolled up and released by the reeling mechanism, and the used bottom paper is automatically rolled up for easy storage and management; the bottom paper is corrected by the first guide and the second guide to prevent the bottom paper from tilting during the reeling process; after the bottom paper is used, it is rolled up by the first reel, and the other end of the bottom paper is automatically attached to the bottom paper by the auxiliary reeling mechanism to prevent the rolled bottom paper from falling apart;

[0016] (2) Printing the time (start time and expiration time) of the label through the first control module, the second control module and the printing mechanism;

[0017] (3) The separation mechanism is used to separate the label from the base paper, making it easier for medical staff to peel the label off the base paper, saving time and effort and reducing the workload of medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and examples.

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a partial structural diagram of the present invention;

[0021] Figure 3 for Figure 2 A magnified view of point A in the figure;

[0022] Figure 4 for Figure 2 Enlarged view of point B in FIG.

[0023] Figure 5 It is a partial structural diagram of the present invention;

[0024] Figure 6 for Figure 5 AA line structural cross-sectional view;

[0025] Figure 7 for Figure 6 Enlarged view of point C in the figure;

[0026] Figure 8 It is a partial structural diagram of the present invention;

[0027] Figure 9 for Figure 8 The enlarged view of point D in the figure;

[0028] Figure 10 It is a partial structural diagram of the present invention;

[0029] Figure 11 It is a partial structural diagram of the present invention. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0031] like Figures 1-11As shown, the portable item validity period label printer described in the present invention includes a body 1, a door 2 hingedly arranged on the body, a reeling mechanism 3 arranged inside the body, a printing mechanism 4 arranged inside the body, a separation mechanism 5 arranged inside the body, an outlet 6 arranged on the body, a first control module 7 and a second control module 8 arranged on the body; the reeling mechanism 3 includes a first base 31 arranged on the body, a first rotating shaft 32 with one end passing through and rotatably arranged on the body, a second rotating shaft 33 with one end rotatably arranged on the body, a third rotating shaft 34 and a fourth rotating shaft 35 with one end rotatably arranged on the body, a fifth rotating shaft 36 and a sixth rotating shaft 37 with one end rotatably arranged on the body, and a first motor 38 arranged on the first base and used to drive the first rotating shaft to rotate; the diameters of the first rotating shaft 32 to the fifth rotating shaft 36 are all set to be the same, and the diameter of the sixth rotating shaft 37 is much smaller than the diameter of the first rotating shaft 32. First, the backing paper is wound onto the second reel. To install the backing paper, a full roll of backing paper and the second reel are placed onto the second sleeve. The other end of the backing paper is then wound around the third, fourth, sixth, and fifth rotating shafts in sequence and attached to the first reel. A reeling mechanism then retracts and releases the backing paper, automatically rewinding it after use for easier storage and management. First and second guides correct the backing paper to prevent it from tilting during reeling. After use, the first reel reels it, and an auxiliary reeling mechanism automatically attaches the other end of the backing paper to it to prevent it from falling apart. To remove the reel, simply pull the first reel and backing paper from the first sleeve. The first control module, the second control module, and the printing mechanism print the time (start time and expiration time) on the label. A separation mechanism separates the label from the backing paper, making it easier for medical staff to remove the label from the backing paper, saving time and effort and reducing workload.

[0032] Specifically, a first sleeve 321 is fixedly mounted on the first rotating shaft 32, a first limiting ring 322 is fixedly mounted on the first rotating shaft, and a first reel 323 is movably mounted on the first sleeve. Rotation of the first rotating shaft drives the first sleeve and the first reel to rotate, further winding the bottom paper. After the bottom paper is wound, the first reel can be directly removed from the first sleeve, facilitating replacement of the bottom paper.

[0033] Specifically, the second shaft 33 is fixedly mounted with a second sleeve 331, a second retaining ring 332 fixedly mounted on the second shaft, a second reel 333 movably mounted on the second sleeve, a backing paper 334 wound around the reel, and a label 335 attached to the backing paper. Both ends of the backing paper are adhesive. Rotation of the second shaft drives the second sleeve and reel to rotate, further allowing the backing paper to be released. The second reel can be directly removed from the second sleeve, facilitating replacement of the backing paper.

[0034] Specifically, a first guide member 9 is provided between the third rotating shaft 34 and the fourth rotating shaft 35, and a second guide member 10 is provided between the fifth rotating shaft 36 and the first rotating shaft 32. The first guide member 9 and the second guide member 10 have the same structure. The first and second guide members correct the bottom paper to prevent it from tilting during the retraction and release process.

[0035] Specifically, the first guide member 9 includes a plate 91 fixed at one end to the machine body, a first guide block 92 fixed to the plate, and a second guide block 93. The base paper passes through the first and second guide blocks, which align the positions of the base paper on both sides to prevent the base paper from tilting, further facilitating subsequent printing.

[0036] Specifically, the printing mechanism 4 includes a bottom plate 41 with one end fixed on the machine body, a first support plate 42 fixed on the bottom plate, a first shaft 43 with one end passing through and rotatably mounted on the first support plate, a second base 44 provided on the first support plate, a second motor 45 provided on the second base and used to drive the first shaft to rotate, a first guide rod 46 and a second guide rod 47 fixed on the bottom plate, a connecting rod 48 with one end fixed on the first guide rod and the other end fixed on the second guide rod, and a movable plate 49 with one end movably sleeved on the first guide rod and the other end movably sleeved on the second guide rod. A slide 410 slidably mounted on the movable plate; a circular plate 411 fixedly mounted on the first shaft and rotatably mounted on the slide; a first spring 412 and a second spring 413 with one end mounted on the connecting rod and the other end mounted on the movable plate; a third spring 414 and a fourth spring 415 with one end mounted on the movable plate and the other end mounted on the base plate; an L-shaped plate 416 with one end fixedly mounted on the movable plate; a printing frame 417 mounted on the L-shaped plate; and a thermal print head 418 mounted on the printing frame. The first control module is connected to the second control module, which is connected to the thermal print head, which is connected to the second motor. The first control module, the second control module, and the thermal print head are all conventional. The first control module includes a key module, a display screen and a power key, and the key module is connected to the display screen and the power key; and the key module includes several time buttons, a function switching button and a clock unit, the several time buttons include: 4h, 1d, 2d, 3d, 7d, 15d, 28d, ×2, ×3, and the function switching button includes: a switch key and an OK key. When the medical staff turns on the power button, the name of the sterile items will be displayed on the display screen according to the data stored in advance by the second control module, including dry cotton swabs, disinfected cotton swabs, sterile trays and other names. Each name is imported in advance by the computer. After the first control module is turned on by the power button, the name is automatically displayed on the display screen, and then the name can be switched through the switch key. Press the confirm key to select the current name; press the switch key again to display the current time. By selecting the time button, the clock unit calculates the expiration time according to the selected duration. After pressing the confirm key, the name, start time and expiration time are displayed in sequence on the display screen. After pressing the confirm key again to confirm the print content, the clock module sends a signal to the second control module, and the second control module controls the thermal print head and the second motor to print the font of the label. It should be noted that the usage of ×2 and ×3 is: when selecting the corresponding duration, select any one of the buttons 4h, 1d, 2d, 3d, 7d, 15d, 28d and press it, then press ×2 or ×3, the clock module will automatically multiply the selected duration by the selected 2 or 3 to convert the corresponding duration, then press the OK button, the name, start time and expiration time will be displayed on the screen in sequence, and then press the OK button to confirm the final duration and confirm printing.For example, if the start time is 2023.9.7 10:00:00, after selecting "Disinfectant Swabs," pressing the "15d" key, then the "×2" key, and then pressing the OK key, the display will show: Name: Disinfectant Swabs, Start Time: 2023.9.7 10:00, Expiration Time: 2023.10.7 10:00. The clock unit refers to the alarm clock setting program or existing units, which is prior art and will not be elaborated here. The calculation of the above time is based on Chinese Utility Model Patent Application No. "202320278718.1" and will not be further described here. After calculating the time, the second control module controls the thermal print head and the second motor (the second motor rotates once per revolution). During this rotation of the second motor, the first shaft rotates, which in turn drives the circular plate, which in turn moves the slide on the movable plate. Simultaneously, the movable plate, the print frame, and the thermal print head first move downward and then upward, achieving reciprocating movement of the thermal print head, further enabling the thermal print head to print on the label on the backing paper. The first through fourth springs ensure smoother up and down movement of the movable plate.

[0037] Specifically, the separation mechanism 5 includes a second support plate 51 fixed at one end to the body, a continuous air supply assembly 52 mounted on the second support plate, a hollow plate 53 mounted on the body, an automatic air injection assembly 54 mounted on the continuous air supply assembly, a connecting pipe 55 connected to the hollow plate, and a plurality of air blowing holes 56 mounted on the hollow plate. The base paper bends when passing through the sixth rotating shaft. Due to the high hardness of the label, the label does not bend after the base paper bends. At this time, the front end of the label separates from the base paper, achieving a preliminary separation. Due to label processing issues, the hardness of the labels varies. After the two are separated, the front end of some labels may bend downward, making it difficult for medical staff to grasp the front end of the label, which in turn causes inconvenience to medical staff. At this time, the separation mechanism blows air upward at the front end of the label, causing the front end of the label to tilt upward after separation, effectively separating the label from the base paper and making it easier for medical staff to quickly pinch the tilted portion of the label and peel it off the base paper.

[0038] Specifically, the continuous air intake assembly 52 includes a housing 521 fixed on the second support plate, a bracket 522 fixed on the second support plate, a first gear 523 fixedly mounted on the sixth rotating shaft, a second shaft 524 fixed on the bracket, a second gear 525 rotatably mounted on the second shaft and meshing with the first gear, a third shaft 526 rotatably mounted on the bracket and rotatably mounted on the housing, a third gear 527 fixedly mounted on the third shaft and meshing with the second gear, A turntable 528 fixedly mounted on the third shaft, three sets of rotating members 529 mounted on the turntable, an air inlet pipe 5210 mounted on the housing, and an air outlet pipe 5211 mounted on the housing and connected to the connecting pipe. The rotating member 529 includes a first slide 5291 mounted on the turntable, a sliding rod 5292 mounted on the housing and slidably mounted on the first slide, and a fifth spring 5293 with one end mounted on the sliding rod and the other end mounted on the turntable. The sixth rotating shaft 37 extends through the bracket 522 and is rotatable. When the first motor is driven to rotate, it drives the first rotating shaft to rotate, causing the first reel to rotate, thereby winding the bottom paper and further causing the second to sixth rotating shafts to rotate. When the sixth shaft rotates, it drives the first gear to rotate. Since the first gear is meshed with the second gear, the rotation of the first gear will drive the second gear to rotate. Since the third gear is rotated with the second gear, the second gear rotation will drive the third gear to rotate, further driving the third shaft to rotate, further driving the turntable to rotate, and further driving the three sets of rotating parts to work, so that the gas entering the air inlet pipe is continuously transported to the air outlet pipe and blown out through the connecting pipe, hollow plate and multiple blowing holes, so that the front end of the label is tilted, making it easier for subsequent medical personnel to remove the label. When the turntable rotates, it drives the sliding rod and the fifth spring to rotate, and at the same time causes the sliding rod to slide on the first slide groove. At the same time, the fifth spring is extended and retracted, and the fifth spring ensures that one end of the sliding rod is always close to the inner wall of the shell.

[0039] Specifically, the automatic gas injection assembly 54 includes a fourth shaft 541 rotatably mounted on the machine body at one end, a conveyor belt 542 with one end wound around the third shaft and the other end wound around the fourth shaft, a fourth gear 543 fixedly mounted on the fourth shaft, a third support plate 544 fixedly mounted on the machine body, a fifth shaft 545 rotatably mounted on the third support plate, a fifth gear 546 fixedly mounted on the fifth shaft and meshing with the fourth gear, a disc 547 fixedly mounted on the fifth shaft, and a The air intake pipe comprises a second chute 548, a slide bar 549 slidably mounted on the second chute, a sealing ring 5410 fixedly mounted on the slide bar and slidably mounted on the air intake pipe, a rotating rod 5411 rotatably mounted on a disc at one end and rotatably mounted on the slide bar at the other end, a first one-way valve 5412 disposed in the air intake pipe, a second one-way valve 5413 disposed on the slide bar, and a third one-way valve 5414 disposed in the air intake pipe. The first one-way valve 5412 to the third one-way valve 5414 all have the same structure. Air pumps are commonly used for air injection, but this is expensive. The automatic air injection assembly of the present invention achieves automatic air injection, saving costs. When the third shaft body rotates, it drives the conveyor belt to rotate, further drives the fourth shaft body to rotate, and further drives the fourth gear to rotate. Since the fourth gear is meshed with the fifth gear, when the fourth gear rotates, it will drive the fifth gear to rotate, further drive the fifth shaft body to rotate, further make the disc rotate, further make the rotating rod rotate, further make the slide bar slide on the second slide groove, and at the same time drive the sealing ring to slide on the intake pipe, and the sealing ring achieves a sealing effect with the second slide groove; when the slide bar slides on the second slide groove, it will drive the second one-way valve to move toward the direction of the first one-way valve first, and then move in the opposite direction, to achieve continuous reciprocating movement; when the second one-way valve moves toward the direction of the first one-way valve, the first one-way valve The pressure in the cavity between the valve and the second one-way valve (called the first cavity) increases and the pressure in the cavity between the second one-way valve and the third one-way valve (called the second cavity) decreases, further causing the second one-way valve to open, allowing the gas in the first cavity to enter the second cavity through the second one-way valve. When the second one-way valve moves toward the direction of the third one-way valve, the pressure in the first cavity decreases and the pressure in the second cavity increases. At this time, the negative pressure in the first cavity attracts and causes the first valve to open, further allowing external air to enter the first cavity through the first valve. Since the pressure in the second cavity increases, the third valve opens, further allowing the gas in the second cavity to enter the shell through the third valve. In summary, through the three one-way valves and the change in pressure, the external air can be automatically injected into the shell, and there is no need to use an air pump for air injection, which saves costs. In addition, the overall portability is also achieved by not connecting an air pump.

[0040] Specifically, the machine body 1 is provided with an auxiliary winding assembly 11, which includes a fourth support plate 111 fixed to the machine body, a movable rod 112 extending through the fourth support plate, a curved plate 113 fixed to the movable rod, and a sixth spring 114 with one end mounted on the curved plate and the other end mounted on the fourth support plate. After the base paper is used up, it is wound up by the first reel. During the winding process, the base paper on the first reel forms a complete roll. When the base paper is finally wound up, it contacts the curved plate, further causing the curved plate and the movable rod to move, causing the sixth spring to expand and contract. The sixth spring applies a reaction force to the curved plate, further causing the curved plate to cling tightly to the base paper, so that the other end of the base paper clings tightly to the base paper. Since both ends of the base paper are adhesive, the other end of the base paper automatically adheres to the base paper when the clinging occurs, completing the winding process and preventing the base paper from falling apart after being wound up.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0042] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A portable item validity period label printer, characterized by: The invention comprises a machine body (1), a machine door (2) hingedly arranged on the machine body, a reeling mechanism (3) arranged inside the machine body, a printing mechanism (4) arranged inside the machine body, a separating mechanism (5) arranged inside the machine body, an outlet (6) arranged on the machine body, a first control module (7) and a second control module (8) arranged on the machine body; the reeling mechanism (3) comprises a first base (31) arranged on the machine body, a first rotating shaft (32) rotatably arranged on the machine body with one end passing through it, a second rotating shaft (33) rotatably arranged on the machine body with one end, a third rotating shaft (34) and a fourth rotating shaft (35) rotatably arranged on the machine body with one end, a fifth rotating shaft (36) and a sixth rotating shaft (37) rotatably arranged on the machine body with one end, and a first motor (38) arranged on the first base and used for driving the first rotating shaft to rotate; the diameters of the first rotating shaft (32) to the fifth rotating shaft (36) are all set to be the same, and the diameter of the sixth rotating shaft (37) is much smaller than the diameter of the first rotating shaft (32); The separation mechanism (5) comprises a second support plate (51) fixedly mounted on the machine body at one end, a continuous air intake assembly (52) mounted on the second support plate, a hollow plate (53) mounted on the machine body, an automatic air injection assembly (54) mounted on the continuous air intake assembly, a connecting pipe (55) connected to the hollow plate, and a plurality of air blowing holes (56) mounted on the hollow plate. The continuous air inlet assembly (52) includes a housing (521) fixedly mounted on the second support plate, a bracket (522) fixedly mounted on the second support plate, a first gear (523) fixedly mounted on the sixth rotating shaft, a second shaft (524) fixedly mounted on the bracket, a second gear (525) rotatably mounted on the second shaft and meshing with the first gear, a third shaft (526) rotatably mounted on the bracket and rotatably mounted on the housing, a third gear (527) fixedly mounted on the third shaft and meshing with the second gear, and a second gear (528) fixedly mounted on the third shaft. A turntable (528) on the third shaft, three sets of rotating parts (529) arranged on the turntable, an air inlet pipe (5210) arranged on the shell, and an air outlet pipe (5211) arranged on the shell and connected to the connecting pipe; the rotating part (529) includes a first slide groove (5291) arranged on the turntable, a sliding rod (5292) with one end abutting against the first slide groove and arranged on the shell and slidably arranged on the first slide groove, and a fifth spring (5293) with one end arranged on the sliding rod and the other end arranged on the turntable; the sixth rotating shaft (37) passes through and is rotatably arranged on the bracket (522); The automatic gas injection assembly (54) includes a fourth shaft (541) rotatably mounted on the machine body at one end, a conveyor belt (542) wound around the third shaft at one end and wound around the fourth shaft at the other end, a fourth gear (543) fixedly mounted on the fourth shaft, a third support plate (544) fixedly mounted on the machine body, a fifth shaft (545) rotatably mounted on the third support plate, a fifth gear (546) fixedly mounted on the fifth shaft and meshing with the fourth gear, a disk (547) fixedly mounted on the fifth shaft, and a fourth gear (543) fixedly mounted on the air inlet pipe. a second slide groove (548) on the intake pipe, a slide rod (549) slidably arranged on the second slide groove, a sealing ring (5410) fixedly arranged on the slide rod and slidably sleeved on the intake pipe, a rotating rod (5411) rotatably arranged on the disc at one end and rotatably arranged on the slide rod at the other end, a first one-way valve (5412) arranged in the intake pipe, a second one-way valve (5413) arranged on the slide rod, and a third one-way valve (5414) arranged in the intake pipe; the structures of the first one-way valve (5412) to the third one-way valve (5414) are all arranged in the same manner; The machine body (1) is provided with an auxiliary winding assembly (11), which comprises a fourth support plate (111) fixedly provided on the machine body, a moving rod (112) passing through and movably provided on the fourth support plate, an arc-shaped plate (113) fixedly provided on the moving rod, and a sixth spring (114) having one end provided on the arc-shaped plate and the other end provided on the fourth support plate.

2. The portable item expiration date label printer according to claim 1, characterized in that: A first sleeve (321) is fixedly sleeved on the first rotating shaft (32), a first limiting ring (322) is fixedly sleeved on the first rotating shaft, and a first reel (323) is movably sleeved on the first sleeve.

3. The portable item expiration date label printer according to claim 2, characterized in that: A second sleeve (331) is fixedly sleeved on the second rotating shaft (33), a second limiting ring (332) is fixedly sleeved on the second rotating shaft, a second reel (333) is movably sleeved on the second sleeve, a base paper (334) is wound around the reel, and a label (335) is provided on the base paper.

4. The portable item expiration date label printer according to claim 3, characterized in that: A first guide member (9) is provided between the third rotating shaft (34) and the fourth rotating shaft (35), and a second guide member (10) is provided between the fifth rotating shaft (36) and the first rotating shaft (32); the first guide member (9) and the second guide member (10) have the same structure.

5. The portable item validity period label printer according to claim 4, characterized in that: The first guide member (9) comprises a plate body (91) with one end fixed on the machine body, a first guide block (92) fixed on the plate body, and a second guide block (93).

6. The portable item validity period label printer according to claim 5, characterized in that: The printing mechanism (4) comprises a bottom plate (41) fixed on the machine body at one end, a first support plate (42) fixed on the bottom plate, a first shaft (43) rotatably provided on the first support plate at one end, a second base (44) provided on the first support plate, a second motor (45) provided on the second base and used to drive the first shaft to rotate, a first guide rod (46) and a second guide rod (47) fixed on the bottom plate, a connecting rod (48) fixed on the first guide rod at one end and fixed on the second guide rod at the other end, and a connecting rod (48) movably sleeved on the first guide rod at one end and A movable plate (49) movably sleeved on the second guide round rod, a slide plate (410) slidably arranged on the movable plate, a circular plate (411) fixedly arranged on the first shaft and rotatably arranged on the slide plate, a first spring (412) and a second spring (413) with one end arranged on the connecting rod and the other end arranged on the movable plate, a third spring (414) and a fourth spring (415) with one end arranged on the movable plate and the other end arranged on the bottom plate, an L-shaped plate (416) with one end fixed on the movable plate, a printing frame (417) arranged on the L-shaped plate, and a thermal print head (418) arranged on the printing frame.

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